Add Glist wrapper to python renderer

* Fix typo
* Extend description

.buildconfig

@@ -1,10 +0,0 @@
-[default]
-name=Default
-runtime=host
-config-opts=
-run-opts=
-prefix=/home/mari/.cache/gnome-builder/install/gds-render/host
-app-id=
-postbuild=
-prebuild=
-default=true

.gitignore

@@ -72,3 +72,5 @@ Thumbs.db
 *.exe
 
 *.user
+*.user*
+*.buildconfig

.gitmodules

@@ -0,0 +1,4 @@
+[submodule "c-style-checker"]
+	path = c-style-checker
+	url = https://git.shimatta.de/mhu/c-style-checker
+	branch = master

AUR/PKGBUILD

@@ -0,0 +1,40 @@
+# Maintainer: Mario Hüttel <mario (dot) huettel (!) gmx (dot) net>
+
+pkgname=gds-render
+pkgver=v1.2_10_g00d02b8
+pkgrel=1
+pkgdesc="Conversion tool for converting GDS layout files into TikZ Code and PDF"
+arch=('i686' 'x86_64')
+url="https://git.shimatta.de/mhu/gds-render"
+licence=('GPLv2')
+depends=('glib2' 'gtk3' 'cairo')
+makedepends=('cmake' 'git')
+privides=('gds-render')
+source=("${pkgname}-git"::"git+https://git.shimatta.de/mhu/gds-render.git")
+sha1sums=('SKIP')
+
+pkgver () {
+	_date=`date +"%Y%m%d"`
+	cd "${srcdir}/${pkgname}-git/version"
+	echo "$(echo "$(sh ./generate-version-string.sh)" | sed 's/-/_/g')"
+}
+
+build () {
+	mkdir "$srcdir/$pkgname-git/build"
+	cd "$srcdir/$pkgname-git/build"
+	cmake -DCMAKE_BUILD_TYPE=Release ..
+	make
+}
+
+package () {
+	cd "$srcdir/$pkgname-git/build"
+	make DESTDIR="${pkgdir}" install 
+	install -D -m664 "$srcdir/$pkgname-git/AUR/gds-render.desktop" \
+			 "$pkgdir/usr/share/applications/gds-render.desktop"
+	install -D -m664 "$srcdir/$pkgname-git/icon/gds-render.svg" \
+			 "$pkgdir/usr/share/icons/hicolor/scalable/apps/gds-render.svg"
+	install -D -m664 "$srcdir/$pkgname-git/icon/128x128/gds-render.png" \
+			 "$pkgdir/usr/share/icons/hicolor/128x128/apps/gds-render.png"
+	
+	(cd $srcdir/$pkgname-git/build/translations/output/ && tar cf - "locale" | (cd "$pkgdir/usr/share/" && tar xf -)) 
+}

AUR/gds-render.desktop

@@ -0,0 +1,9 @@
+[Desktop Entry]
+Version=1.0
+Type=Application
+Name=GDS-Render
+Comment=Converter for GDS layout files
+Icon=gds-render
+Exec=gds-render
+Categories=Graphics
+

CMakeLists.txt

@@ -1,38 +1,94 @@
+project(gds-render)
+
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  set(CMAKE_INSTALL_PREFIX "/usr/" CACHE PATH "..." FORCE)
+endif()
+
+if(NOT WIN32)
+  string(ASCII 27 Esc)
+  set(ColorReset "${Esc}[m")
+  set(ColorBold  "${Esc}[1m")
+  set(Red         "${Esc}[31m")
+  set(Green       "${Esc}[32m")
+  set(Yellow      "${Esc}[33m")
+  set(Blue        "${Esc}[34m")
+  set(Magenta     "${Esc}[35m")
+  set(Cyan        "${Esc}[36m")
+  set(White       "${Esc}[37m")
+  set(BoldRed     "${Esc}[1;31m")
+  set(BoldGreen   "${Esc}[1;32m")
+  set(BoldYellow  "${Esc}[1;33m")
+  set(BoldBlue    "${Esc}[1;34m")
+  set(BoldMagenta "${Esc}[1;35m")
+  set(BoldCyan    "${Esc}[1;36m")
+  set(BoldWhite   "${Esc}[1;37m")
+endif()
+
 cmake_minimum_required(VERSION 2.8)
 find_package(PkgConfig REQUIRED)
 pkg_search_module(GLIB REQUIRED glib-2.0)
 pkg_check_modules(GTK3 REQUIRED gtk+-3.0)
 pkg_check_modules(CAIRO REQUIRED cairo)
 
-project(gds-render)
+include_directories(${GLIB_INCLUDE_DIRS} ${GTK3_INCLUDE_DIRS} ${CAIRO_INCLUDE_DIRS} ${CMAKE_CURRENT_SOURCE_DIR}/include)
+add_subdirectory(plugins)
 
-add_subdirectory(glade)
+IF(CMAKE_BUILD_TYPE STREQUAL "Debug")
+        message("${Yellow}Debug mode for translations used!${ColorReset}")
+	add_definitions(-DGETTEXT_PACKAGE=\"gds-render\" -DLOCALEDATADIR=\"${CMAKE_CURRENT_BINARY_DIR}/translations/output\")
+	message("${BoldMagenta}${CMAKE_CURRENT_BINARY_DIR}/translations/output used as data dir${ColorReset}")
+else(CMAKE_BUILD_TYPE STREQUAL "Debug")
+	message("${BoldCyan}Global locale directory used. Make sure files in /usr/share/locale are available${ColorReset}")
+	add_definitions(-DGETTEXT_PACKAGE=\"gds-render\" -DLOCALEDATADIR=\"/usr/share\")
+ENDIF(CMAKE_BUILD_TYPE STREQUAL "Debug")
 
-include_directories(${GLIB_INCLUDE_DIRS} ${GTK3_INCLUDE_DIRS} ${CAIRO_INCLUDE_DIRS})
-link_directories(${GLIB_LINK_DIRS} ${GTK3_LINK_DIRS} ${CAIRO_LINK_DIRS})
-add_definitions(${GLIB2_CFLAGS_OTHER})
 
 
 aux_source_directory("widgets" LAYER_SOURCES)
-aux_source_directory("tree-renderer" RENDERER_SOURCES)
-aux_source_directory("gds-parser" PARSER_SOURCES)
-aux_source_directory("latex-output" LATEX_SOURCES)
-aux_source_directory("cairo-output" CAIRO_SOURCES)
-set(SOURCE "main.c" "layer-selector.c" "main-window.c")
+aux_source_directory("cell-selector" CELL_SELECTOR_SOURCES)
+aux_source_directory("gds-utils" GDS_SOURCES)
+aux_source_directory("output-renderers" OUTPUT_RENDERER_SOURCES)
+aux_source_directory("geometric" GEOMETRIC_SOURCES)
+aux_source_directory("layer" LAYER_SELECTOR_SOURCES)
+set(SOURCE "main.c" "command-line.c" "gds-render-gui.c")
 
 set(SOURCE
   ${SOURCE}
   ${LAYER_SOURCES}
-  ${RENDERER_SOURCES}
-  ${PARSER_SOURCES}
-  ${LATEX_SOURCES}
-  ${CAIRO_SOURCES}
+  ${CELL_SELECTOR_SOURCES}
+  ${GDS_SOURCES}
+  ${OUTPUT_RENDERER_SOURCES}
+  ${GEOMETRIC_SOURCES}
+  ${LAYER_SELECTOR_SOURCES}
 )
 
-add_compile_options(-Wall)
+set(SOURCE_GENERATED
+  ${CMAKE_CURRENT_BINARY_DIR}/resources/resources.c
+)
 
-add_executable(${PROJECT_NAME} ${SOURCE} ${CMAKE_CURRENT_BINARY_DIR}/glade/resources.c)
+link_directories(${GLIB_LINK_DIRS} ${GTK3_LINK_DIRS} ${CAIRO_LINK_DIRS})
+SET_SOURCE_FILES_PROPERTIES(${SOURCE_GENERATED} PROPERTIES GENERATED 1)
+
+add_subdirectory(test)
+
+add_compile_options(-Wall -Wextra -Wold-style-declaration -Wuninitialized -Wmaybe-uninitialized -Wunused-parameter)
+
+add_subdirectory(resources)
+add_subdirectory(doxygen)
+add_subdirectory(translations)
+add_subdirectory(version)
+
+link_directories(${GLIB_LINK_DIRS} ${GTK3_LINK_DIRS} ${CAIRO_LINK_DIRS})
+add_definitions(${GLIB2_CFLAGS_OTHER})
+
+add_executable(${PROJECT_NAME} ${SOURCE} ${SOURCE_GENERATED})
 add_dependencies(${PROJECT_NAME} glib-resources)
-SET_SOURCE_FILES_PROPERTIES(${CMAKE_CURRENT_BINARY_DIR}/glade/resources.c PROPERTIES GENERATED 1)
-target_link_libraries(${PROJECT_NAME} ${GLIB_LDFLAGS} ${GTK3_LDFLAGS} ${CAIRO_LDFLAGS} m)
+add_dependencies(${PROJECT_NAME} version)
+add_dependencies(${PROJECT_NAME} translations)
+
+install (TARGETS ${PROJECT_NAME} 
+	RUNTIME	
+		DESTINATION bin
+	)
+target_link_libraries(${PROJECT_NAME} ${GLIB_LDFLAGS} ${GTK3_LDFLAGS} ${CAIRO_LDFLAGS} m version ${CMAKE_DL_LIBS})
 

README.MD

@@ -0,0 +1,21 @@
+# GDS-Render Readme
+
+This software is a rendering programm for GDS2 layout files.
+The GDS2 format is mainly used in integrated circuit development.
+This program allows the conversion of a GDS file to a vector graphics file.
+
+## Output Formats
+* Export GDS Layout to LaTeX (using TikZ).
+* Export to PDF (Cairographics).
+
+# Features
+Note: Due to various size limitations of both TikZ and the PDF export, the layout might not render correctly. In this case adjust the scale value. A higher scale value scales down your design.
+
+* Configurable layer stack-up.
+* Layer colors configurable as ARGB color values.
+* Command line interface.
+* ~~Awesome~~ Somehow usable GUI.
+
+# License and Other Stuff
+* Free software (GPLv2 _only_)
+* Coded in plain C using GTK+3.0, Glib2, and Cairographics

cairo-output/cairo-output.c

@@ -1,248 +0,0 @@
-/*
- * GDSII-Converter
- * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
- *
- * This file is part of GDSII-Converter.
- *
- * GDSII-Converter is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * GDSII-Converter is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "cairo-output.h"
-#include <math.h>
-#include <stdlib.h>
-#include <cairo.h>
-#include <cairo-pdf.h>
-
-struct cairo_layer {
-		cairo_t *cr;
-		cairo_surface_t *rec;
-		struct layer_info *linfo;
-};
-
-static void revert_inherited_transform(struct cairo_layer *layers)
-{
-	int i;
-
-	for (i = 0; i < MAX_LAYERS; i++) {
-		if (layers[i].cr == NULL)
-			continue;
-		cairo_restore(layers[i].cr);
-	}
-}
-
-static void apply_inherited_transform_to_all_layers(struct cairo_layer *layers,
-						    const struct gds_point *origin,
-						    double magnification,
-						    gboolean flipping,
-						    double rotation,
-						    double scale)
-{
-	int i;
-	cairo_t *temp_layer_cr;
-
-	for (i = 0; i < MAX_LAYERS; i++) {
-		temp_layer_cr = layers[i].cr;
-		if (temp_layer_cr == NULL)
-			continue;
-
-		/* Save the state and apply transformation */
-		cairo_save(temp_layer_cr);
-		cairo_translate(temp_layer_cr, (double)origin->x/scale, (double)origin->y/scale);
-		cairo_rotate(temp_layer_cr, M_PI*rotation/180.0);
-		cairo_scale(temp_layer_cr, magnification,
-			    (flipping == TRUE ? -magnification : magnification));
-	}
-}
-
-static void render_cell(struct gds_cell *cell, struct cairo_layer *layers, double scale)
-{
-	GList *instance_list;
-	struct gds_cell *temp_cell;
-	struct gds_cell_instance *cell_instance;
-	GList *gfx_list;
-	struct gds_graphics *gfx;
-	GList *vertex_list;
-	struct gds_point *vertex;
-	cairo_t *cr;
-
-	/* Render child cells */
-	for (instance_list = cell->child_cells; instance_list != NULL; instance_list = instance_list->next) {
-		cell_instance = (struct gds_cell_instance *)instance_list->data;
-		if ((temp_cell = cell_instance->cell_ref) != NULL) {
-			apply_inherited_transform_to_all_layers(layers,
-								&cell_instance->origin,
-								cell_instance->magnification,
-								cell_instance->flipped,
-								cell_instance->angle,
-								scale);
-			render_cell(temp_cell, layers, scale);
-			revert_inherited_transform(layers);
-		}
-	}
-
-	/* Render graphics */
-	for (gfx_list = cell->graphic_objs; gfx_list != NULL; gfx_list = gfx_list->next) {
-		gfx = (struct gds_graphics *)gfx_list->data;
-
-		/* Get layer renderer */
-		if (gfx->layer >= MAX_LAYERS)
-			continue;
-		if ((cr = layers[gfx->layer].cr) == NULL)
-			continue;
-
-		/* Apply settings */
-		cairo_set_line_width(cr, (gfx->width_absolute ? gfx->width_absolute/scale : 1));
-
-		switch (gfx->path_render_type) {
-		case PATH_FLUSH:
-			cairo_set_line_cap(cr, CAIRO_LINE_CAP_BUTT);
-			break;
-		case PATH_ROUNDED:
-			cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
-			break;
-		case PATH_SQUARED:
-			cairo_set_line_cap(cr, CAIRO_LINE_CAP_SQUARE);
-			break;
-		}
-
-		/* Add vertices */
-		for (vertex_list = gfx->vertices; vertex_list != NULL; vertex_list = vertex_list->next) {
-			vertex = (struct gds_point *)vertex_list->data;
-
-			/* If first point -> move to, else line to */
-			if (vertex_list->prev == NULL)
-				cairo_move_to(cr, vertex->x/scale, vertex->y/scale);
-			else
-				cairo_line_to(cr, vertex->x/scale, vertex->y/scale);
-
-		}
-
-		/* Create graphics object */
-		switch (gfx->gfx_type) {
-		case GRAPHIC_PATH:
-			cairo_stroke(cr);
-			break;
-		case GRAPHIC_BOX:
-		case GRAPHIC_POLYGON:
-			cairo_set_line_width(cr, 0.1/scale);
-			cairo_close_path(cr);
-			cairo_stroke_preserve(cr); // Prevent graphic glitches
-			cairo_fill(cr);
-			break;
-		}
-
-	}
-
-}
-
-void cairo_render_cell_to_pdf(struct gds_cell *cell, GList *layer_infos, char *pdf_file, double scale)
-{
-	cairo_surface_t *pdf_surface;
-	cairo_t *pdf_cr;
-	struct layer_info *linfo;
-	struct cairo_layer *layers;
-	struct cairo_layer *lay;
-	GList *info_list;
-	int i;
-	double rec_x0, rec_y0, rec_width, rec_height;
-	double xmin = INT32_MAX, xmax = INT32_MIN, ymin = INT32_MAX, ymax = INT32_MIN;
-
-	layers = (struct cairo_layer *)calloc(MAX_LAYERS, sizeof(struct cairo_layer));
-
-	/* Clear layers */
-	for (i = 0; i < MAX_LAYERS; i++) {
-		layers[i].cr = NULL;
-		layers[i].rec = NULL;
-	}
-
-	/* Create recording surface for each layer */
-	for (info_list = layer_infos; info_list != NULL; info_list = g_list_next(info_list)) {
-		linfo = (struct layer_info *)info_list->data;
-		if (linfo->layer < MAX_LAYERS) {
-			lay = &(layers[(unsigned int)linfo->layer]);
-			lay->linfo = linfo;
-			lay->rec = cairo_recording_surface_create(CAIRO_CONTENT_COLOR_ALPHA,
-								  NULL);
-			lay->cr = cairo_create(layers[(unsigned int)linfo->layer].rec);
-			cairo_scale(lay->cr, 1, -1); // Fix coordinate system
-			cairo_set_source_rgb(lay->cr, linfo->color.red, linfo->color.green, linfo->color.blue);
-		} else {
-			printf("Layer number (%d) too high!\n", linfo->layer);
-			goto ret_clear_layers;
-		}
-	}
-
-
-	render_cell(cell, layers, scale);
-
-	/* get size of image and top left coordinate */
-	for (info_list = layer_infos; info_list != NULL; info_list = g_list_next(info_list)) {
-		linfo = (struct layer_info *)info_list->data;
-
-		if (linfo->layer >= MAX_LAYERS) {
-			printf("Layer outside of Spec.\n");
-			continue;
-		}
-
-		/* Print size */
-		cairo_recording_surface_ink_extents(layers[linfo->layer].rec, &rec_x0, &rec_y0,
-				&rec_width, &rec_height);
-		printf("Size of layer %d: %lf -- %lf\n", linfo->layer,
-		       rec_width, rec_height);
-
-		/* update bounding box */
-		xmin = MIN(xmin, rec_x0);
-		xmax = MAX(xmax, rec_x0);
-		ymin = MIN(ymin, rec_y0);
-		ymax = MAX(ymax, rec_y0);
-		xmin = MIN(xmin, rec_x0+rec_width);
-		xmax = MAX(xmax, rec_x0+rec_width);
-		ymin = MIN(ymin, rec_y0+rec_height);
-		ymax = MAX(ymax, rec_y0+rec_height);
-
-	}
-
-	printf("Bounding box: (%lf,%lf) -- (%lf,%lf)\n", xmin, ymin, xmax, ymax);
-
-	pdf_surface = cairo_pdf_surface_create(pdf_file, xmax-xmin, ymax-ymin);
-	pdf_cr = cairo_create(pdf_surface);
-
-	/* Write layers to PDF */
-	for (info_list = layer_infos; info_list != NULL; info_list = g_list_next(info_list)) {
-		linfo = (struct layer_info *)info_list->data;
-
-		if (linfo->layer >= MAX_LAYERS) {
-			printf("Layer outside of Spec.\n");
-			continue;
-		}
-
-		cairo_set_source_surface(pdf_cr, layers[linfo->layer].rec, -xmin, -ymin);
-		cairo_paint_with_alpha(pdf_cr, linfo->color.alpha);
-	}
-
-	cairo_show_page(pdf_cr);
-	cairo_destroy(pdf_cr);
-	cairo_surface_destroy(pdf_surface);
-
-ret_clear_layers:
-	for (i = 0; i < MAX_LAYERS; i++) {
-		lay = &layers[i];
-		if(lay->cr) {
-			cairo_destroy(lay->cr);
-			cairo_surface_destroy(lay->rec);
-		}
-	}
-	free(layers);
-
-	printf("cairo export finished. It might still be buggy!\n");
-}

cairo-output/cairo-output.h

@@ -1,30 +0,0 @@
-/*
- * GDSII-Converter
- * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
- *
- * This file is part of GDSII-Converter.
- *
- * GDSII-Converter is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * GDSII-Converter is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef __CAIRO_OUTPUT_H__
-#define __CAIRO_OUTPUT_H__
-
-#include "../layer-selector.h"
-#include "../gds-parser/gds-types.h"
-
-#define MAX_LAYERS (300)
-
-void cairo_render_cell_to_pdf(struct gds_cell *cell, GList *layer_infos, char *pdf_file, double scale);
-
-#endif /* __CAIRO_OUTPUT_H__ */

cell-selector/lib-cell-renderer.c

@@ -14,22 +14,35 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "lib-cell-renderer.h"
-#include "../gds-parser/gds-types.h"
+/**
+ * @file lib-cell-renderer.c
+ * @brief LibCellRenderer GObject Class
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup LibCellRenderer
+ * @{
+ */
+
+#include <gds-render/cell-selector/lib-cell-renderer.h>
+#include <gds-render/gds-utils/gds-types.h>
 
 G_DEFINE_TYPE(LibCellRenderer, lib_cell_renderer, GTK_TYPE_CELL_RENDERER_TEXT)
 
 enum {
-	PROP_LIB = 1,
-	PROP_CELL,
-	PROP_COUNT
+	PROP_LIB = 1, /**< @brief Library to display the name of */
+	PROP_CELL, /**< @brief Cell to display the name of */
+	PROP_ERROR_LEVEL, /**< @brief Error level of cell/library for coloring */
+	PROP_COUNT /**< @brief Sentinel */
 };
 
 void lib_cell_renderer_init(LibCellRenderer *self)
 {
+	(void)self;
 	/* Nothing to do */
 }
 
@@ -38,23 +51,58 @@ static void lib_cell_renderer_constructed(GObject *obj)
 	G_OBJECT_CLASS(lib_cell_renderer_parent_class)->constructed(obj);
 }
 
+static void convert_error_level_to_color(GdkRGBA *color, unsigned int error_level)
+{
+
+	/* Always use no transparency */
+	color->alpha = 1.0;
+
+	if (error_level & LIB_CELL_RENDERER_ERROR_ERR) {
+		/* Error set. Color cell red */
+		color->red = 1.0;
+		color->blue = 0.0;
+		color->green = 0.0;
+	} else if (error_level & LIB_CELL_RENDERER_ERROR_WARN) {
+		/* Only warning set; orange color */
+		color->red = 1.0;
+		color->blue = 0.0;
+		color->green = 0.6;
+	} else {
+		/* Everything okay; green color */
+		color->red = (double)61.0/(double)255.0;
+		color->green = (double)152.0/(double)255.0;
+		color->blue = 0.0;
+	}
+}
+
 static void lib_cell_renderer_set_property(GObject      *object,
 					   guint        param_id,
 					   const GValue *value,
 					   GParamSpec   *pspec)
 {
 	GValue val = G_VALUE_INIT;
-
-	g_value_init(&val, G_TYPE_STRING);
+	GdkRGBA color;
 
 	switch (param_id) {
 	case PROP_LIB:
+		g_value_init(&val, G_TYPE_STRING);
 		g_value_set_string(&val, ((struct gds_library *)g_value_get_pointer(value))->name);
 		g_object_set_property(object, "text", &val);
+		g_value_unset(&val);
 		break;
 	case PROP_CELL:
+		g_value_init(&val, G_TYPE_STRING);
 		g_value_set_string(&val, ((struct gds_cell *)g_value_get_pointer(value))->name);
 		g_object_set_property(object, "text", &val);
+		g_value_unset(&val);
+		break;
+	case PROP_ERROR_LEVEL:
+		/* Set cell color according to error level */
+		g_value_init(&val, GDK_TYPE_RGBA);
+		convert_error_level_to_color(&color, g_value_get_uint(value));
+		g_value_set_boxed(&val, &color);
+		g_object_set_property(object, "foreground-rgba", &val);
+		g_value_unset(&val);
 		break;
 	default:
 		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, param_id, pspec);
@@ -67,6 +115,8 @@ static void lib_cell_renderer_get_property(GObject      *object,
 					   GValue	*value,
 					   GParamSpec   *pspec)
 {
+	(void)value;
+
 	switch (param_id) {
 	default:
 		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, param_id, pspec);
@@ -74,11 +124,12 @@ static void lib_cell_renderer_get_property(GObject      *object,
 	}
 }
 
-static GParamSpec *properties [PROP_COUNT];
+static GParamSpec *properties[PROP_COUNT];
 
 void lib_cell_renderer_class_init(LibCellRendererClass *klass)
 {
 	GObjectClass *oclass = G_OBJECT_CLASS(klass);
+
 	oclass->constructed = lib_cell_renderer_constructed;
 	oclass->set_property = lib_cell_renderer_set_property;
 	oclass->get_property = lib_cell_renderer_get_property;
@@ -89,6 +140,8 @@ void lib_cell_renderer_class_init(LibCellRendererClass *klass)
 	properties[PROP_CELL] = g_param_spec_pointer("gds-cell", "gds-cell",
 							 "Cell reference to be displayed",
 							 G_PARAM_WRITABLE);
+	properties[PROP_ERROR_LEVEL] = g_param_spec_uint("error-level", "error-level",
+							"Error level of this cell", 0, 255, 0, G_PARAM_WRITABLE);
 
 	g_object_class_install_properties(oclass, PROP_COUNT, properties);
 }
@@ -97,3 +150,5 @@ GtkCellRenderer *lib_cell_renderer_new()
 {
 	return GTK_CELL_RENDERER(g_object_new(TYPE_LIB_CELL_RENDERER, NULL));
 }
+
+/** @} */

command-line.c

@@ -0,0 +1,248 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file command-line.c
+ * @brief Function to render according to command line parameters
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup cmdline
+ * @{
+ */
+
+#include <stdio.h>
+#include <glib/gi18n.h>
+
+#include <gds-render/command-line.h>
+#include <gds-render/gds-utils/gds-parser.h>
+#include <gds-render/layer/layer-settings.h>
+#include <gds-render/output-renderers/cairo-renderer.h>
+#include <gds-render/output-renderers/latex-renderer.h>
+#include <gds-render/output-renderers/external-renderer.h>
+#include <gds-render/gds-utils/gds-tree-checker.h>
+
+static int string_array_count(char **string_array)
+{
+	int count;
+
+	if (!string_array)
+		return 0;
+
+	for (count = 0; *string_array; string_array++)
+		count++;
+
+	return count;
+}
+
+static int create_renderers(char **renderers,
+			    char **output_file_names,
+			    gboolean tex_layers,
+			    gboolean tex_standalone,
+			    const struct external_renderer_params *ext_params,
+			    GList **renderer_list,
+			    LayerSettings *layer_settings)
+{
+	char **renderer_iter;
+	char *current_renderer;
+	int idx;
+	char *current_out_file;
+	int count_render, count_out;
+	GdsOutputRenderer *output_renderer;
+
+	if (!renderer_list)
+		return -1;
+
+	if (!renderers || !output_file_names) {
+		fprintf(stderr, _("Please specify renderers and file names\n"));
+		return -1;
+	}
+
+	count_render = string_array_count(renderers);
+	count_out = string_array_count(output_file_names);
+	if (count_render != count_out) {
+		fprintf(stderr, _("Count of renderers %d does not match count of output file names %d\n"),
+			count_render, count_out);
+		return -1;
+	}
+
+	/* Parse cmd line parameters */
+	for (renderer_iter = renderers, idx = 0; *renderer_iter; renderer_iter++, idx++) {
+		current_renderer = *renderer_iter;
+		current_out_file = output_file_names[idx];
+
+		/* File valid ? */
+		if (!current_out_file || !current_out_file[0])
+			continue;
+
+		if (!strcmp(current_renderer, "tikz")) {
+			output_renderer = GDS_RENDER_OUTPUT_RENDERER(latex_renderer_new_with_options(tex_layers,
+												     tex_standalone));
+		} else if (!strcmp(current_renderer, "pdf")) {
+			output_renderer = GDS_RENDER_OUTPUT_RENDERER(cairo_renderer_new_pdf());
+		} else if (!strcmp(current_renderer, "svg")) {
+			output_renderer = GDS_RENDER_OUTPUT_RENDERER(cairo_renderer_new_svg());
+		} else if (!strcmp(current_renderer, "ext")) {
+			if (!ext_params->so_path) {
+				fprintf(stderr, _("Please specify shared object for external renderer. Will ignore this renderer.\n"));
+				continue;
+			}
+			output_renderer = GDS_RENDER_OUTPUT_RENDERER(
+						external_renderer_new_with_so_and_param(ext_params->so_path,
+											ext_params->cli_params));
+		} else {
+			continue;
+		}
+
+		gds_output_renderer_set_output_file(output_renderer, current_out_file);
+		gds_output_renderer_set_layer_settings(output_renderer, layer_settings);
+		*renderer_list = g_list_append(*renderer_list, output_renderer);
+	}
+
+	return 0;
+}
+
+static struct gds_cell *find_gds_cell_in_lib(struct gds_library *lib, const char *cell_name)
+{
+	GList *cell_list;
+	struct gds_cell *return_cell = NULL;
+	struct gds_cell *temp_cell;
+
+	for (cell_list = lib->cells; cell_list; cell_list = g_list_next(cell_list)) {
+		temp_cell = (struct gds_cell *)cell_list->data;
+		if (!strncmp(temp_cell->name, cell_name, CELL_NAME_MAX)) {
+			return_cell = temp_cell;
+			break;
+		}
+	}
+	return return_cell;
+}
+
+int command_line_convert_gds(const char *gds_name,
+			      const char *cell_name,
+			      char **renderers,
+			      char **output_file_names,
+			      const char *layer_file,
+			      struct external_renderer_params *ext_param,
+			      gboolean tex_standalone,
+			      gboolean tex_layers,
+			      double scale)
+{
+	int ret = -1;
+	int render_ret;
+	GList *libs = NULL;
+	int res;
+	GList *renderer_list = NULL;
+	GList *list_iter;
+	struct gds_library *first_lib;
+	struct gds_cell *toplevel_cell = NULL;
+	LayerSettings *layer_sett;
+	GdsOutputRenderer *current_renderer;
+
+	/* Check if parameters are valid */
+	if (!gds_name || !cell_name || !output_file_names || !layer_file || !renderers) {
+		printf(_("Probably missing argument. Check --help option\n"));
+		return -2;
+	}
+
+	/* Load layer_settings */
+	layer_sett = layer_settings_new();
+	if (!layer_sett)
+		goto return_value;
+
+	ret = layer_settings_load_from_csv(layer_sett, layer_file);
+	if (ret) {
+		fprintf(stderr, _("Loading layer mapping file failed.\n"));
+		goto ret_destroy_layer_mapping;
+	}
+
+	/* Create renderers */
+	if (create_renderers(renderers, output_file_names, tex_layers, tex_standalone,
+			     ext_param, &renderer_list, layer_sett))
+		goto ret_destroy_layer_mapping;
+
+
+	/* Load GDS */
+	clear_lib_list(&libs);
+	res = parse_gds_from_file(gds_name, &libs);
+	if (res)
+		goto ret_destroy_library_list;
+
+	/* find_cell in first library. */
+	if (!libs)
+		goto ret_clear_renderers;
+
+	first_lib = (struct gds_library *)libs->data;
+	if (!first_lib) {
+		fprintf(stderr, _("No library in library list. This should not happen.\n"));
+		/* This is safe. Library destruction can handle an empty list element */
+		goto ret_destroy_library_list;
+	}
+
+	/* Find cell in first library */
+	toplevel_cell = find_gds_cell_in_lib(first_lib, cell_name);
+
+	if (!toplevel_cell) {
+		printf(_("Couldn't find cell in first library!\n"));
+		goto ret_destroy_library_list;
+	}
+
+	/* Check if cell passes vital checks */
+	res = gds_tree_check_reference_loops(toplevel_cell->parent_library);
+	if (res < 0) {
+		fprintf(stderr, _("Checking library %s failed.\n"), first_lib->name);
+		goto ret_destroy_library_list;
+	} else if (res > 0) {
+		fprintf(stderr, _("%d reference loops found.\n"), res);
+
+		/* do further checking if the specified cell and/or its subcells are affected */
+		if (toplevel_cell->checks.affected_by_reference_loop == 1) {
+			fprintf(stderr, _("Cell is affected by reference loop. Abort!\n"));
+			goto ret_destroy_library_list;
+		}
+	}
+
+	if (toplevel_cell->checks.affected_by_reference_loop == GDS_CELL_CHECK_NOT_RUN)
+		fprintf(stderr, _("Cell was not checked. This should not happen. Please report this issue. Will continue either way.\n"));
+
+	/* Note: unresolved references are not an abort condition.
+	 * Deal with it.
+	 */
+
+	/* Execute all rendererer instances */
+	for (list_iter = renderer_list; list_iter; list_iter = list_iter->next) {
+		current_renderer = GDS_RENDER_OUTPUT_RENDERER(list_iter->data);
+		render_ret = gds_output_renderer_render_output(current_renderer, toplevel_cell, scale);
+		if (render_ret)
+			fprintf(stderr, "Rendering failed with error code: %d\n", render_ret);
+	}
+
+ret_destroy_library_list:
+	clear_lib_list(&libs);
+ret_clear_renderers:
+	for (list_iter = renderer_list; list_iter; list_iter = list_iter->next)
+		g_object_unref(list_iter->data);
+ret_destroy_layer_mapping:
+	g_object_unref(layer_sett);
+return_value:
+	return ret;
+}
+
+/** @} */

doxygen/CMakeLists.txt

@@ -0,0 +1,19 @@
+find_package(Doxygen)
+
+if (DOXYGEN_FOUND)
+	add_custom_target(documentation DEPENDS doxygen doxygen-pdf)
+
+	add_custom_target(doxygen
+		COMMAND ./build-doxygen.sh "${PROJECT_BINARY_DIR}"
+		WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+		COMMENT "Generating documentation with Doxygen")
+
+	add_custom_target(
+	   doxygen-pdf
+	   COMMAND make
+	   WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/latex"
+	   DEPENDS doxygen
+	   )
+else (DOXYGEN_FOUND)
+	message("Doxygen needs to be installed to generate the doxygen documentation")
+endif (DOXYGEN_FOUND)

doxygen/activity-bar.dox

@@ -0,0 +1,6 @@
+/**
+ * @defgroup ActivityBar Activity Bar
+ * @ingroup Widgets
+ *
+ * Activity Status Bar 
+ */

doxygen/build-doxygen.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+SOURCE="${BASH_SOURCE[0]}"
+while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
+  DIR="$( cd -P "$( dirname "$SOURCE" )" >/dev/null && pwd )"
+  SOURCE="$(readlink "$SOURCE")"
+  [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
+done
+DIR="$( cd -P "$( dirname "$SOURCE" )" >/dev/null && pwd )"
+cd "$DIR"
+
+export PROJECT_NUMBER=`../version/generate-version-string.sh`
+
+if [ $# != 1 ]; then
+	export OUTPUT_DIRECTORY="./output"
+else
+	export OUTPUT_DIRECTORY="$1"
+fi
+
+doxygen Doxyconfig

doxygen/cairo-renderer.dox

@@ -0,0 +1,4 @@
+/**
+ * @defgroup Cairo-Renderer Cairo Renderer 
+ * @ingroup GdsOutputRenderer
+ */

doxygen/command-line.dox

@@ -0,0 +1,3 @@
+/**
+ * @defgroup cmdline Command Line Interface
+ */

doxygen/compilation.dox

@@ -0,0 +1,88 @@
+/**
+
+@page compilation Compilation
+
+@section Preface
+
+GDS-Render is designed for UNIX-like, especially GNU/Linux based systems.
+It was developed under a Linux system. Therefore, best performance is expected using a Linux operating system.
+
+@section depencencies Dependencies
+The dependencies of GDS-Render are:
+
+@subsection run-deps Program Dependencies
+
+ - GLib2
+ - GTK3
+ - Cairographics
+
+@subsection comp-deps Compilation Dependencies
+These dependencies are not needed for running the program; just for compilation.
+
+ - Build System (GCC + binutils, make, etc...). Most distributions supply a "development" meta-package containing this stuff.
+ - cmake >= 2.8
+ - More or less optional: git. Used for extraction of the precise version number. It is strongly recommended to provide git!
+ - Optional: doxygen for this nice documentation.
+
+The dependency list of GTK3 already includes Cairographics and GLib2. You should be on the safe side with a recent GTK3 version.
+
+Development is done with the following library versions:
+
+| Cairographics | GLib2      | GTK3      |
+| ------------- | ---------- | --------- |
+| 1.17.2        | 2.64.2     | 3.24.18   |
+
+@section comp-instr Compilation Instructions
+@subsection linux-build General Linux Build Instruction
+Go to the build directory you want to compile in. This may be the gds-render project root.
+Execute
+@code
+ cmake -DCMAKE_BUILD_TYPE=Release <Path to gds-render root>
+@endcode
+
+for a build in release configuartion. Use `-DCMAKE_BUILD_TYPE=Debug` for debugging. Cmake will check the dependencies.
+
+Once cmake has finished, type
+@code
+ make
+@endcode
+to build the program and 
+ 
+@code
+ make documentation
+@endcode
+to build the doxygen documentation.
+
+@subsection arch-makepkg Archlinux Package
+
+The subfolder 'AUR' contains a PKGBUILD file to build an Archlinux/Pacman package.
+
+@subsection comp-warnings Compiler Warnings
+
+The compiler will throw the following warnings. Compiled with GCC 9.3.0.
+
+| Warning | Assessment |
+| ------- | ---------- |
+| warning: ‘calculate_path_miter_points’ defined but not used [-Wunused-function] | Ignore. Function will be used in later versions. |
+
+
+@subsection windows-compilation Compilation for Windows
+
+@warning Windows is not a target system for this application, considering that this program converts GDS files which are most likely generated under a Linux system. The tips shown in this section are a guidance for anyone trying to build this application for Windows.
+
+@warning Note that the Windows compatibility may decrease in future releases and a simple compilation like with this version might not be possible anymore.
+
+The current release of 'gds-render' does not compile under a windows system, due to incompatibilities in the external library renderer.
+It is possible to comment out the code that causes the incompatibility. The external renderer will not be usable after this.
+
+Steps:
+
+ - Go to file external-renderer.c
+ - Remove `#include` <dlfcn.h>
+ - comment out all code in #external_renderer_render_cell
+
+The program should now compile.
+
+@warning This guide is out of date. The Cairo renderer doesn't compile under windows anymore due to the usage of the fork() system call. It is possible to patch this out in order to restore Windows compatibility.
+
+*/

doxygen/external-renderer.dox

@@ -0,0 +1,27 @@
+/**
+ * @defgroup ExternalRenderer External Shared Object Renderer
+ * @ingroup GdsOutputRenderer
+ *
+ * @section ExternalRendererProps Properties
+ * This class inherits all properties from its parent @ref GdsOutputRenderer.
+ * In addition to that, it implements the following properties:
+ *
+ * Property Name    | Description
+ * -----------------|----------------------------------------------------------------
+ * shared-object-path  | Path to the shared object used for rendering
+ * param-string | Command line parameters passed to external renderer's init function
+ *
+ * All these properties have to be set for rendering.
+ *
+ * @section ExternalRendererFuncs Necessary Functions
+ *
+ * The following functions and variables are necessary for an external renderer to implement:
+ *
+ * Code Define 				| Prototype  																	|  Description
+ * ---------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------
+ * @ref EXTERNAL_LIBRARY_RENDER_FUNCTION	| int EXTERNAL_LIBRARY_RENDER_FUNCTION(struct gds_cell *toplevel, GList *layer_info_list, const char *output_file_name, double scale)		| Render cell to output file
+ * @ref EXTERNAL_LIBRARY_INIT_FUNCTION		| int EXTERNAL_LIBRARY_INIT_FUNCTION(const char *option_string, const char *version_string)							| Init function. Executed before rendering. This is given the command line parameters specified for the external renderer and the version string of the currently running gds-render program.
+ * @ref EXTERNAL_LIBRARY_FORK_REQUEST		| int EXTERNAL_LIBRARY_FORK_REQUEST;														| The pure presence of this integer results in the execution inside a subprocess of hte whole shared object's code
+ * @ref EXTERNAL_LIBRARY_FINALIZE_FUNCTION | int EXTERNAL_LIBRARY_FINALIZE_FUNCTION(void) | Called after rendering
+ *
+ */

doxygen/gds-output-renderer.dox

@@ -0,0 +1,34 @@
+/**
+ * @defgroup GdsOutputRenderer GDS Output Renderer base class
+ * 
+ * The renderers are used to convert the cell structures read from the GDS layout file
+ * into different output formats.
+ * 
+ * The GdsOutputRenderer base class is used to derive all renderers from.
+ *
+ * @warning Although the GdsOutputRenderer class provides compatibility for asynchronous rendering,
+ * the class is not thread safe / re-entrant. Only use it from a signle context. Not even the rendering function called is allowed to modifiy this object.
+ * 
+ * A allowed function to be called from the async rendering thread is #gds_output_renderer_update_async_progress and the get functions for the properties.
+ *  
+ * @note The context that owned the renderer has to ensure that only one rendering is active at a time for a single instance of a renderer.
+ *
+ * By default this class implements the following features:
+ * 
+ * @section GdsOutputRendererProps Properties
+ * Property Name    | Description
+ * -----------------|----------------------------------------------------------------
+ * layer-settings   | LayerSettings object containing the layer rendering information
+ * output-file      | Output file name for rendering
+ *
+ * All these properties have to be set for rendering.
+ *
+ * @section GdsOutputRendererSignals Signals / Events
+ * Signal Name      | Description                                     | Callback prototype
+ * -----------------|-------------------------------------------------|-----------------------------------------------------------
+ * async-finished   | The asynchronous rendering is finished          | void callback(GdsOutputRenderer *src, gpointer user_data)
+ * progress-changed | The asynchronous rendering progress changed     | void callback(GdsOutputRenderer *src, const char *progress, gpointer user_data)
+ *
+ * @note The `char *progress` supplied to the callback function must not be modified or freed.
+ *
+ */

doxygen/geometric.dox

@@ -0,0 +1,8 @@
+/* This file only contains help information for doxygen */
+
+/**
+ * @defgroup geometric Geometric Helper Functions
+ * 
+ * The geometric helper function are used to calculate bounding boxes
+ * @warning Code is incomplete. Please double check for functionality!
+ */

doxygen/gui.dox

@@ -0,0 +1,5 @@
+/* This file only contains help information for doxygen */
+
+/**
+ * @defgroup GUI Graphical User Interface
+ */

doxygen/latex-renderer.dox

@@ -0,0 +1,16 @@
+/**
+ * @defgroup LaTeX-Renderer LaTeX / TikZ Renderer 
+ * @ingroup GdsOutputRenderer
+ *
+ * This is the class implementing the \f$\mbox{\LaTeX}\f$ / TikZ output rendering
+
+ * @section LaTeXRendererProps Properties
+ * This class inherits all properties from its parent @ref GdsOutputRenderer.
+ * In addition to that, it implements the following properties:
+ *
+ * Property Name    | Description
+ * -----------------|----------------------------------------------------------------
+ * standalone  | Configure output LaTeX document to be standalone compilable (requires standalone documentclass)
+ * pdf-layers | Create OCG layers in LaTeX output
+ *
+ */

doxygen/layer-selector.dox

@@ -0,0 +1,7 @@
+/**
+ * @defgroup layer-selector LayerSelector Object
+ * @ingroup GUI
+ *
+ * This objects implements the layer selector and displays the layers in a list box.
+ * It uses @ref LayerElement objects to display the individual layers inside the list box. 
+ */

doxygen/lib-cell-renderer.dox

@@ -0,0 +1,18 @@
+/**
+ * @defgroup LibCellRenderer LibCellRenderer GObject
+ * @ingroup GUI
+ *
+ * The LibCellRenderer Object is used to render @ref gds_cell and @ref gds_library elements 
+ * to a GtkTreeView.
+ *
+ * The LibCellRenderer class is derived from a GtkCellRendererText and works the same way.
+ * The additinal features are three new properties:
+ *
+ * - *gds-lib*: This property can be used to set a @ref gds_library structure. The renderer will render the name of the library.
+ * - *gds-cell*: This property can be used to set a @ref gds_cell structure. The renderer will render the name of the cell.
+ * - *error-level*: Set the error level of the cell/library. This affects the foreground color of hte rendered output.
+ *
+ * Internally the class operates by setting the 'text' property, which is inherited form the base class to the library/cell name (gds_library::name and gds_cell::name fields).
+ * The error level (@ref LIB_CELL_RENDERER_ERROR_WARN and @ref LIB_CELL_RENDERER_ERROR_ERR) is translated to the inherited 'foreground-rgba' property.
+ *
+ */

doxygen/lmf-spec.dox

@@ -0,0 +1,34 @@
+/**
+@page lmf-spec Layer Mapping File Specification
+
+File Format
+-----------
+
+The layer mapping file contains information on how to render the layers.
+The information is stored in CSV format -- *True CSV*; not that rubbish with semicolons that Excel calls CSV.
+
+Each line representing a layer consists of following fields:
+
+> layer,r,g,b,a,export,name
+
+- **layer**: Layer number identifiying this layer.
+- **r**,**b**,**g**,**a**: RGBA color value uning double precision float values in the range from 0 to 1.
+- **export**: Either '1' or '0'. Defining whether to render this layer into the output file.
+- **name**: The name of the layer.
+
+the order of the layers inside the layer mapping file defines the layer stack in the rendered output.
+The first layer is at the bottom, the last at the top.
+
+
+Handling Inside the GUI
+-----------------------
+
+The layer mapping file can be imported and exported inside the GUI.
+
+### Export 
+During export, all layer configurations are written to the mapping file
+
+### Import
+During import, all layer configurations are loaded from the mapping file. This overwrites any configuration done to that layer. Layers that are not present in the layer mapping file are appended at the end of the list. This means, they are rendered on top of the other layers. Because the layer mapping file does not contain any information on these layers, their configuration is not reset during import.
+
+*/

doxygen/main-page.dox

@@ -0,0 +1,23 @@
+/**
+
+@mainpage
+This programm converts GDS layout files to
+
+- PDF Files using the @ref Cairo-Renderer
+- Latex code (TikZ) using the @ref LaTeX-Renderer
+
+See the @subpage usage page for details and @subpage compilation for building instructions and @subpage versioning for the versioning scheme of this program.
+
+
+
+
+
+
+
+
+
+
+
+
+
+*/

doxygen/output/.gitignore

@@ -0,0 +1,3 @@
+*
+*/
+!.gitignore

doxygen/plugins.dox

@@ -0,0 +1,6 @@
+/**
+ * @defgroup plugins External Renderer Plugins
+ * 
+ * These plugins can be loaded with the @ref ExternalRenderer
+ *
+ */ 

doxygen/usage.dox

@@ -0,0 +1,40 @@
+/**
+@page usage Usage
+@section cmd Command Line Interface
+To use the application on the command line check 'gds-render `--`help'.
+
+Usage:
+  gds-render [OPTION…]  FILE - Convert GDS file `<FILE>` to graphic
+
+Help Options:  
+  -h, `--`help                          Show help options  
+  `--`help-all                          Show all help options  
+  `--`help-gtk                          Show GTK+ Options  
+  
+Application Options:  
+  -v, `--`version                       Print version  
+  -r, `--`renderer=pdf|svg|tikz|ext     Renderer to use  
+  -s, `--`scale=`<SCALE>`                 Divide output coordinates by `<SCALE>`  
+  -o, `--`output-file=PATH              Output file path  
+  -m, `--`mapping=PATH                  Path for Layer Mapping File  
+  -c, `--`cell=NAME                     Cell to render  
+  -a, `--`tex-standalone                Create standalone PDF  
+  -l, `--`tex-layers                    Create PDF Layers (OCG)  
+  -P, `--`custom-render-lib=PATH        Path to a custom shared object, that implements the render_cell_to_file function  
+  `--`display=DISPLAY                   X display to use  
+
+
+@section gui Graphical User Interface
+
+The graphical user interface (GUI) can be used to open GDS Files, configure the layer rendering (colors, order, transparency etc.), and convert cells.
+
+It is possible to export the layer configurations so they can be used later on. Even in the @ref cmd 
+
+@image html gui.png
+@image latex gui.png
+
+The cell selector on the left shows the GDS Libraries and Cells. The cells are marked green if all references inside the cell could be found. If not all references could be found, the cell is marked orange. This doens't show if child cells have missing childs. Only one level of the hierarchy is checked in order to make it easier to spot an errorneous cell. Cells with missing child cells are still renderable but `--` obviously `--` faulty. If a cell or any sub-cell contains a reference loop, the cell is marked red. In this case it can't be selected for rendering.
+
+In the above image one cell is green; so everything is okay. And the other one is red, which indicates a reference loop. This cell cannot be selected for rendering!
+*/
+

doxygen/versioning.dox

@@ -0,0 +1,36 @@
+/**
+@page versioning Version Number
+
+@section main-version Main Versioning Scheme
+The version number of this application consists of a given version in the format of 'v1.0'.
+Where the first number indicates a major release and the second number indicates minor changes.
+
+Versions, including release candidates and patch-levels, are tagged in git.
+
+@subsection rc Release Candidates
+Release candidates are software versions that seem stable and functional to become a new version but testing is not fully finished. These versions are marked with an '-rcX', where X is the number of the release candidate.
+The 3rd release candidate of version 4.2 would be '*v4.2-rc3*'.
+Release candidates are in a frozen state. Only bugfixes that are necessary for functionality are applied to these versions before releasing the final version.
+
+@subsection patch-level Patch Levels
+If an already released version contains bugs that need to be fixed, the version number is not incremented. Insted a new version number with a patch-level is created. The patch-level is appended with a dash directly after the version number. The fist patch-level of version 3.5 would be: 'v3.5-1'.
+
+
+@section git-version-num Git Based Version Number
+
+The application and this documentation contain a git-based version number. With this version number not only released versions but all development points of the software can be uniquely identified.
+
+An example for such a version number is: *v1.0-rc4-41-gaa41373-dirty*
+
+It consists of the last @ref main-version (in this case version 1.0 -- Release candidate 4) and some other information from the source code management system. The number after the version tag is the commit count after the given version. In this case the specified version is 41 commits after the last tagged version 'v1.0-rc4'. The next section always starts with a 'g' (for git) and after that contains the first letters of the commit ID. In this case an additional '-dirty' is appended, showing that the software version contains unstaged changes.
+
+In tabular form: *v1.0-rc4-41-gaa41373-dirty*
+
+| Last tagged version | Commits since that version | Start of commit ID | Unstaged changes? |
+|---------------------|----------------------------|--------------------|---------------------|
+| 1.0-rc4             | 41                         | aa41373            | yes                 |
+
+
+This git-based version number is automatically put into the application and this documentation during the application's compilation / the documentation's generation. For this *git* is needed. Therefore, it is highly recommended to have 'git' installed for compilation although it is no build dependency. In case of a missing git installation, the string "! version not set !" is compiled into the application.
+
+**/

doxygen/widgets.dox

@@ -0,0 +1,6 @@
+/* This file only contains help information for doxygen */
+
+/**
+ * @defgroup Widgets Custom GTK Widgets
+ * @ingroup GUI
+ */

gds-parser/gds-types.h

@@ -1,63 +0,0 @@
-#ifndef __GDS_TYPES_H__
-#define __GDS_TYPES_H__
-
-#include <stdint.h>
-#include <glib.h>
-
-#define CELL_NAME_MAX (100)
-#define MIN(a,b) (((a) < (b)) ? (a) : (b))
-#define MAX(a,b) (((a) > (b)) ? (a) : (b))
-
-enum graphics_type {GRAPHIC_PATH = 0, GRAPHIC_POLYGON = 1, GRAPHIC_BOX};
-enum path_type {PATH_FLUSH = 0, PATH_ROUNDED = 1, PATH_SQUARED = 2};
-
-struct gds_point {
-	int x;
-	int y;
-};
-
-struct gds_time_field {
-	uint16_t year;
-	uint16_t month;
-	uint16_t day;
-	uint16_t hour;
-	uint16_t minute;
-	uint16_t second;
-};
-
-struct gds_graphics {
-	enum graphics_type gfx_type;
-	GList *vertices;
-	enum path_type path_render_type;
-	int width_absolute;
-	int16_t layer;
-	uint16_t datatype;
-};
-
-struct gds_cell_instance {
-	char ref_name[CELL_NAME_MAX];
-	struct gds_cell *cell_ref;
-	struct gds_point origin;
-	int flipped;
-	double angle;
-	double magnification;
-};
-
-struct gds_cell {
-	char name[CELL_NAME_MAX];
-	struct gds_time_field mod_time;
-	struct gds_time_field access_time;
-	GList *child_cells;
-	GList *graphic_objs;
-};
-
-struct gds_library {
-	char name[CELL_NAME_MAX];
-	struct gds_time_field mod_time;
-	struct gds_time_field access_time;
-	double unit_to_meters;
-	GList *cells;
-	GList *cell_names;
-};
-
-#endif /* __GDS_TYPES_H__ */

gds-render-gui.c

@@ -0,0 +1,838 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file gds-render-gui.c
+ * @brief Handling of GUI
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/** @addtogroup GUI
+ * @{
+ */
+
+#include <stdio.h>
+#include <gtk/gtk.h>
+#include <glib/gi18n.h>
+
+#include <gds-render/gds-render-gui.h>
+#include <gds-render/gds-utils/gds-parser.h>
+#include <gds-render/gds-utils/gds-tree-checker.h>
+#include <gds-render/layer/layer-selector.h>
+#include <gds-render/widgets/activity-bar.h>
+#include <gds-render/cell-selector/lib-cell-renderer.h>
+#include <gds-render/output-renderers/latex-renderer.h>
+#include <gds-render/output-renderers/cairo-renderer.h>
+#include <gds-render/widgets/conv-settings-dialog.h>
+#include <gds-render/geometric/cell-geometrics.h>
+#include <gds-render/version.h>
+
+/** @brief Columns of selection tree view */
+enum cell_store_columns {
+	CELL_SEL_LIBRARY = 0,
+	CELL_SEL_CELL,
+	CELL_SEL_CELL_ERROR_STATE, /**< Used for cell color and selectability */
+	CELL_SEL_COLUMN_COUNT /**< @brief Not a column. Used to determine count of columns */
+};
+
+enum gds_render_gui_signal_sig_ids {SIGNAL_WINDOW_CLOSED = 0, SIGNAL_COUNT};
+
+static guint gds_render_gui_signals[SIGNAL_COUNT];
+
+struct gui_button_states {
+	gboolean rendering_active;
+	gboolean valid_cell_selected;
+};
+
+struct _GdsRenderGui {
+	/* Parent GObject */
+	GObject parent;
+
+	/* Custom fields */
+	GtkWindow *main_window;
+	GtkWidget *convert_button;
+	GtkWidget *open_button;
+	GtkWidget *load_layer_button;
+	GtkWidget *save_layer_button;
+	GtkWidget *select_all_button;
+	GtkTreeStore *cell_tree_store;
+	GtkTreeModelFilter *cell_filter;
+	GtkWidget *cell_search_entry;
+	LayerSelector *layer_selector;
+	GtkTreeView *cell_tree_view;
+	GList *gds_libraries;
+	ActivityBar *activity_status_bar;
+	struct render_settings render_dialog_settings;
+	ColorPalette *palette;
+	struct gui_button_states button_state_data;
+};
+
+G_DEFINE_TYPE(GdsRenderGui, gds_render_gui, G_TYPE_OBJECT)
+
+/**
+ * @brief Main window close event
+ * @param window GtkWindow which is closed
+ * @param event unused event
+ * @param user GdsRenderGui instance
+ * @return Status of the event handling. Always true.
+ */
+static gboolean on_window_close(gpointer window, GdkEvent *event, gpointer user)
+{
+	GdsRenderGui *self;
+	(void)event;
+
+	self = RENDERER_GUI(user);
+	/* Don't close window in case of error */
+	if (!self)
+		return TRUE;
+
+	/* Close Window. Leads to termination of the program/the current instance */
+	g_clear_object(&self->main_window);
+	gtk_widget_destroy(GTK_WIDGET(window));
+
+	/* Delete loaded library data */
+	clear_lib_list(&self->gds_libraries);
+
+	g_signal_emit(self, gds_render_gui_signals[SIGNAL_WINDOW_CLOSED], 0);
+
+	return TRUE;
+}
+
+/**
+ * @brief This function only allows valid cells to be selected
+ * @param selection
+ * @param model
+ * @param path
+ * @param path_currently_selected
+ * @param data
+ * @return TRUE if element is selectable, FALSE if not
+ */
+static gboolean tree_sel_func(GtkTreeSelection *selection,
+				GtkTreeModel *model,
+				GtkTreePath *path,
+				gboolean path_currently_selected,
+				gpointer data)
+{
+	GtkTreeIter iter;
+	struct gds_cell *cell;
+	unsigned int error_level;
+	gboolean ret = FALSE;
+	(void)selection;
+	(void)path_currently_selected;
+	(void)data;
+
+	gtk_tree_model_get_iter(model, &iter, path);
+	gtk_tree_model_get(model, &iter, CELL_SEL_CELL, &cell, CELL_SEL_CELL_ERROR_STATE, &error_level, -1);
+
+	/* Allow only rows with _valid_ cell to be selected */
+	if (cell) {
+		/* Cell available. Check if it passed the critical checks */
+		if (!(error_level & LIB_CELL_RENDERER_ERROR_ERR))
+			ret = TRUE;
+	}
+
+	return ret;
+}
+
+/**
+ * @brief Trigger refiltering of cell filter
+ * @param entry Unused widget, that emitted the signal
+ * @param data GdsrenderGui self instance
+ */
+static void cell_tree_view_change_filter(GtkWidget *entry, gpointer data)
+{
+	GdsRenderGui *self = RENDERER_GUI(data);
+	(void)entry;
+
+	gtk_tree_model_filter_refilter(self->cell_filter);
+}
+
+/**
+ * @brief cell_store_filter_visible_func Decides whether an element of the tree model @p model is visible.
+ * @param model Tree model
+ * @param iter Current element / iter in Model to check
+ * @param data Data. Set to static stores variable
+ * @return TRUE if visible, else FALSE
+ * @note TODO: Maybe implement Damerau-Levenshtein distance matching
+ */
+static gboolean cell_store_filter_visible_func(GtkTreeModel *model, GtkTreeIter *iter, gpointer data)
+{
+	GdsRenderGui *self;
+	struct gds_cell *cell;
+	struct gds_library *lib;
+	gboolean result = FALSE;
+	const char *search_string;
+
+	self = RENDERER_GUI(data);
+	g_return_val_if_fail(RENDERER_IS_GUI(self), FALSE);
+
+	if (!model || !iter)
+		goto exit_filter;
+
+	gtk_tree_model_get(model, iter, CELL_SEL_CELL, &cell, CELL_SEL_LIBRARY, &lib, -1);
+
+	if (lib) {
+		result = TRUE;
+		goto exit_filter;
+	}
+
+	if (!cell)
+		goto exit_filter;
+
+	search_string = gtk_entry_get_text(GTK_ENTRY(self->cell_search_entry));
+
+	/* Show all, if field is empty */
+	if (!strlen(search_string))
+		result = TRUE;
+
+	if (strstr(cell->name, search_string))
+		result = TRUE;
+
+	gtk_tree_view_expand_all(self->cell_tree_view);
+
+exit_filter:
+	return result;
+}
+
+/**
+ * @brief Setup a GtkTreeView with the necessary columns
+ * @param self Current GUI object
+ */
+int gds_render_gui_setup_cell_selector(GdsRenderGui *self)
+{
+	GtkCellRenderer *render_cell;
+	GtkCellRenderer *render_lib;
+	GtkTreeViewColumn *column;
+
+	self->cell_tree_store = gtk_tree_store_new(CELL_SEL_COLUMN_COUNT, G_TYPE_POINTER,
+					 G_TYPE_POINTER, G_TYPE_UINT);
+
+	/* Searching */
+	self->cell_filter = GTK_TREE_MODEL_FILTER(
+				gtk_tree_model_filter_new(GTK_TREE_MODEL(self->cell_tree_store), NULL));
+
+	gtk_tree_model_filter_set_visible_func(self->cell_filter,
+						(GtkTreeModelFilterVisibleFunc)cell_store_filter_visible_func,
+						 self, NULL);
+	g_signal_connect(GTK_SEARCH_ENTRY(self->cell_search_entry), "search-changed",
+			 G_CALLBACK(cell_tree_view_change_filter), self);
+
+	gtk_tree_view_set_model(self->cell_tree_view, GTK_TREE_MODEL(self->cell_filter));
+
+	render_cell = lib_cell_renderer_new();
+	render_lib = lib_cell_renderer_new();
+
+	column = gtk_tree_view_column_new_with_attributes(_("Library"), render_lib, "gds-lib", CELL_SEL_LIBRARY, NULL);
+	gtk_tree_view_append_column(self->cell_tree_view, column);
+
+	column = gtk_tree_view_column_new_with_attributes(_("Cell"), render_cell, "gds-cell", CELL_SEL_CELL,
+							  "error-level", CELL_SEL_CELL_ERROR_STATE, NULL);
+	gtk_tree_view_append_column(self->cell_tree_view, column);
+
+	/* Callback for selection
+	 * This prevents selecting a library
+	 */
+	gtk_tree_selection_set_select_function(gtk_tree_view_get_selection(self->cell_tree_view),
+					       tree_sel_func, NULL, NULL);
+
+	return 0;
+}
+
+/**
+ * @brief Callback function of Load GDS button
+ * @param button
+ * @param user GdsRenderGui instance
+ */
+static void on_load_gds(gpointer button, gpointer user)
+{
+	GList *cell;
+	GtkTreeIter libiter;
+	GtkTreeIter celliter;
+	GList *lib;
+	struct gds_library *gds_lib;
+	struct gds_cell *gds_c;
+	GdsRenderGui *self;
+	GtkWidget *open_dialog;
+	GtkFileChooser *file_chooser;
+	GtkFileFilter *filter;
+	GtkStyleContext *button_style;
+	gint dialog_result;
+	int gds_result;
+	char *filename;
+	unsigned int cell_error_level;
+
+	self = RENDERER_GUI(user);
+	if (!self)
+		return;
+
+	open_dialog = gtk_file_chooser_dialog_new(_("Open GDSII File"), self->main_window,
+						  GTK_FILE_CHOOSER_ACTION_OPEN,
+						  _("Cancel"), GTK_RESPONSE_CANCEL,
+						  _("Open GDSII"), GTK_RESPONSE_ACCEPT,
+						  NULL);
+	file_chooser = GTK_FILE_CHOOSER(open_dialog);
+
+	/* Add GDS II Filter */
+	filter = gtk_file_filter_new();
+	gtk_file_filter_add_pattern(filter, "*.gds");
+	gtk_file_filter_set_name(filter, _("GDSII-Files"));
+	gtk_file_chooser_add_filter(file_chooser, filter);
+
+	dialog_result = gtk_dialog_run(GTK_DIALOG(open_dialog));
+
+	if (dialog_result != GTK_RESPONSE_ACCEPT)
+		goto end_destroy;
+
+	/* Get File name */
+	filename = gtk_file_chooser_get_filename(file_chooser);
+
+	gtk_tree_store_clear(self->cell_tree_store);
+	clear_lib_list(&self->gds_libraries);
+
+	/* Parse new GDSII file */
+	gds_result = parse_gds_from_file(filename, &self->gds_libraries);
+
+	/* Delete file name afterwards */
+	g_free(filename);
+	if (gds_result)
+		goto end_destroy;
+
+	/* remove suggested action from Open button */
+	button_style = gtk_widget_get_style_context(GTK_WIDGET(button));
+	gtk_style_context_remove_class(button_style, "suggested-action");
+
+	for (lib = self->gds_libraries; lib != NULL; lib = lib->next) {
+		gds_lib = (struct gds_library *)lib->data;
+		/* Create top level iter */
+		gtk_tree_store_append(self->cell_tree_store, &libiter, NULL);
+
+		gtk_tree_store_set(self->cell_tree_store, &libiter,
+				   CELL_SEL_LIBRARY, gds_lib,
+				   -1);
+
+		/* Check this library. This might take a while */
+		(void)gds_tree_check_cell_references(gds_lib);
+		(void)gds_tree_check_reference_loops(gds_lib);
+
+		for (cell = gds_lib->cells; cell != NULL; cell = cell->next) {
+			gds_c = (struct gds_cell *)cell->data;
+			gtk_tree_store_append(self->cell_tree_store, &celliter, &libiter);
+
+			/* Get the checking results for this cell */
+			cell_error_level = 0;
+			if (gds_c->checks.unresolved_child_count)
+				cell_error_level |= LIB_CELL_RENDERER_ERROR_WARN;
+
+			/* Check if it is completely b0rken */
+			if (gds_c->checks.affected_by_reference_loop)
+				cell_error_level |= LIB_CELL_RENDERER_ERROR_ERR;
+
+			/* Add cell to tree store model */
+			gtk_tree_store_set(self->cell_tree_store, &celliter,
+					   CELL_SEL_CELL, gds_c,
+					   CELL_SEL_CELL_ERROR_STATE, cell_error_level,
+					   CELL_SEL_LIBRARY, gds_c->parent_library,
+					   -1);
+		} /* for cells */
+	} /* for libraries */
+
+	/* Create Layers in Layer Box */
+	layer_selector_generate_layer_widgets(self->layer_selector, self->gds_libraries);
+
+end_destroy:
+	/* Destroy dialog and filter */
+	gtk_widget_destroy(open_dialog);
+}
+
+static void process_button_state_changes(GdsRenderGui *self)
+{
+	gboolean convert_button_state = FALSE;
+	gboolean open_gds_button_state = FALSE;
+
+	/* Calculate states */
+	if (!self->button_state_data.rendering_active) {
+		open_gds_button_state = TRUE;
+		if (self->button_state_data.valid_cell_selected)
+			convert_button_state = TRUE;
+	}
+
+	/* Apply states */
+	gtk_widget_set_sensitive(self->convert_button, convert_button_state);
+	gtk_widget_set_sensitive(self->open_button, open_gds_button_state);
+}
+
+/**
+ * @brief Callback for auto coloring button
+ * @param button
+ * @param user
+ */
+static void on_auto_color_clicked(gpointer button, gpointer user)
+{
+	GdsRenderGui *self;
+	(void)button;
+
+	self = RENDERER_GUI(user);
+	layer_selector_auto_color_layers(self->layer_selector, self->palette, 1.0);
+}
+
+static void async_rendering_finished_callback(GdsOutputRenderer *renderer, gpointer gui)
+{
+	GdsRenderGui *self;
+
+	self = RENDERER_GUI(gui);
+
+	self->button_state_data.rendering_active = FALSE;
+	process_button_state_changes(self);
+	activity_bar_set_ready(self->activity_status_bar);
+
+	g_object_unref(renderer);
+}
+
+static void async_rendering_status_update_callback(GdsOutputRenderer *renderer,
+						   const char *status_message,
+						   gpointer data)
+{
+	GdsRenderGui *gui;
+	(void)renderer;
+
+	gui = RENDERER_GUI(data);
+
+	activity_bar_set_busy(gui->activity_status_bar, status_message);
+}
+
+/**
+ * @brief Convert button callback
+ * @param button
+ * @param user
+ */
+static void on_convert_clicked(gpointer button, gpointer user)
+{
+	(void)button;
+	GdsRenderGui *self;
+	GtkTreeSelection *selection;
+	GtkTreeIter iter;
+	GtkTreeModel *model;
+	struct gds_cell *cell_to_render;
+	GtkWidget *dialog;
+	RendererSettingsDialog *settings;
+	GtkFileFilter *filter;
+	gint res;
+	char *file_name;
+	union bounding_box cell_box;
+	unsigned int height, width;
+	struct render_settings *sett;
+	LayerSettings *layer_settings;
+	GdsOutputRenderer *render_engine;
+
+	self = RENDERER_GUI(user);
+
+	if (!self)
+		return;
+
+	/* Abort if rendering is already active */
+	if (self->button_state_data.rendering_active == TRUE)
+		return;
+
+	sett = &self->render_dialog_settings;
+
+	/* Get selected cell */
+	selection = gtk_tree_view_get_selection(self->cell_tree_view);
+	if (gtk_tree_selection_get_selected(selection, &model, &iter) == FALSE)
+		return;
+
+	gtk_tree_model_get(model, &iter, CELL_SEL_CELL, &cell_to_render, -1);
+
+	if (!cell_to_render)
+		return;
+
+	/* Get layers that are rendered */
+	layer_settings = layer_selector_export_rendered_layer_info(self->layer_selector);
+
+	/* Calculate cell size in DB units */
+	bounding_box_prepare_empty(&cell_box);
+	calculate_cell_bounding_box(&cell_box, cell_to_render);
+
+	/* Calculate size in database units
+	 * Note that the results are bound to be positive,
+	 * so casting them to unsigned int is absolutely valid
+	 */
+	height = (unsigned int)(cell_box.vectors.upper_right.y - cell_box.vectors.lower_left.y);
+	width = (unsigned int)(cell_box.vectors.upper_right.x - cell_box.vectors.lower_left.x);
+
+	/* Show settings dialog */
+	settings = renderer_settings_dialog_new(GTK_WINDOW(self->main_window));
+	renderer_settings_dialog_set_settings(settings, sett);
+	renderer_settings_dialog_set_database_unit_scale(settings, cell_to_render->parent_library->unit_in_meters);
+	renderer_settings_dialog_set_cell_height(settings, height);
+	renderer_settings_dialog_set_cell_width(settings, width);
+	g_object_set(G_OBJECT(settings), "cell-name", cell_to_render->name, NULL);
+
+	res = gtk_dialog_run(GTK_DIALOG(settings));
+	if (res == GTK_RESPONSE_OK) {
+		renderer_settings_dialog_get_settings(settings, sett);
+		gtk_widget_destroy(GTK_WIDGET(settings));
+	} else {
+		gtk_widget_destroy(GTK_WIDGET(settings));
+		goto ret_layer_destroy;
+	}
+
+	/* save file dialog */
+	dialog = gtk_file_chooser_dialog_new((sett->renderer == RENDERER_LATEX_TIKZ
+					      ? "Save LaTeX File" : "Save PDF"),
+					     GTK_WINDOW(self->main_window), GTK_FILE_CHOOSER_ACTION_SAVE,
+					     "Cancel", GTK_RESPONSE_CANCEL, "Save", GTK_RESPONSE_ACCEPT, NULL);
+	/* Set file filter according to settings */
+	filter = gtk_file_filter_new();
+	switch (sett->renderer) {
+	case RENDERER_LATEX_TIKZ:
+		gtk_file_filter_add_pattern(filter, "*.tex");
+		gtk_file_filter_set_name(filter, "LaTeX-Files");
+		break;
+	case RENDERER_CAIROGRAPHICS_PDF:
+		gtk_file_filter_add_pattern(filter, "*.pdf");
+		gtk_file_filter_set_name(filter, "PDF-Files");
+		break;
+	case RENDERER_CAIROGRAPHICS_SVG:
+		gtk_file_filter_add_pattern(filter, "*.svg");
+		gtk_file_filter_set_name(filter, "SVG-Files");
+		break;
+	}
+
+	gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), filter);
+
+	gtk_file_chooser_set_do_overwrite_confirmation(GTK_FILE_CHOOSER(dialog), TRUE);
+
+	res = gtk_dialog_run(GTK_DIALOG(dialog));
+	if (res == GTK_RESPONSE_ACCEPT) {
+		file_name = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
+		gtk_widget_destroy(dialog);
+
+		switch (sett->renderer) {
+		case RENDERER_LATEX_TIKZ:
+			render_engine =
+				GDS_RENDER_OUTPUT_RENDERER(latex_renderer_new_with_options(sett->tex_pdf_layers,
+											   sett->tex_standalone));
+			break;
+		case RENDERER_CAIROGRAPHICS_SVG:
+			render_engine = GDS_RENDER_OUTPUT_RENDERER(cairo_renderer_new_svg());
+			break;
+		case RENDERER_CAIROGRAPHICS_PDF:
+			render_engine = GDS_RENDER_OUTPUT_RENDERER(cairo_renderer_new_pdf());
+			break;
+		default:
+			/* Abort rendering */
+			render_engine = NULL;
+			break;
+		}
+
+		if (render_engine) {
+			gds_output_renderer_set_output_file(render_engine, file_name);
+			gds_output_renderer_set_layer_settings(render_engine, layer_settings);
+			/* Prevent user from overwriting library or triggering additional conversion */
+			self->button_state_data.rendering_active = TRUE;
+			process_button_state_changes(self);
+
+			g_signal_connect(render_engine, "async-finished", G_CALLBACK(async_rendering_finished_callback),
+					 self);
+
+			activity_bar_set_busy(self->activity_status_bar, _("Rendering cell..."));
+
+			g_signal_connect(render_engine, "progress-changed",
+					 G_CALLBACK(async_rendering_status_update_callback), self);
+			gds_output_renderer_render_output_async(render_engine, cell_to_render, sett->scale);
+		}
+		g_free(file_name);
+	} else {
+		gtk_widget_destroy(dialog);
+	}
+ret_layer_destroy:
+	g_object_unref(layer_settings);
+}
+
+/**
+ * @brief cell_tree_view_activated Callback for 'double click' on cell selector element
+ * @param tree_view The tree view the event occured in
+ * @param path path to the selected row
+ * @param column The clicked column
+ * @param user pointer to GdsRenderGui object
+ */
+static void cell_tree_view_activated(gpointer tree_view, GtkTreePath *path,
+				     GtkTreeViewColumn *column, gpointer user)
+{
+	(void)tree_view;
+	(void)path;
+	(void)column;
+
+	on_convert_clicked(NULL, user);
+}
+
+/**
+ * @brief Callback for cell-selection change event
+ *
+ * This function activates/deactivates the convert button depending on whether
+ * a cell is selected for conversion or not
+ * @param sel
+ * @param self
+ */
+static void cell_selection_changed(GtkTreeSelection *sel, GdsRenderGui *self)
+{
+	GtkTreeModel *model = NULL;
+	GtkTreeIter iter;
+
+	if (gtk_tree_selection_get_selected(sel, &model, &iter)) {
+		/* Node selected. Show button */
+		self->button_state_data.valid_cell_selected = TRUE;
+	} else {
+		self->button_state_data.valid_cell_selected = FALSE;
+	}
+
+	process_button_state_changes(self);
+}
+
+static void sort_up_callback(GtkWidget *widget, gpointer user)
+{
+	(void)widget;
+	GdsRenderGui *self;
+
+	self = RENDERER_GUI(user);
+	if (!self)
+		return;
+	layer_selector_force_sort(self->layer_selector, LAYER_SELECTOR_SORT_UP);
+}
+
+static void sort_down_callback(GtkWidget *widget, gpointer user)
+{
+	(void)widget;
+	GdsRenderGui *self;
+
+	self = RENDERER_GUI(user);
+	if (!self)
+		return;
+	layer_selector_force_sort(self->layer_selector, LAYER_SELECTOR_SORT_DOWN);
+}
+
+static void gds_render_gui_dispose(GObject *gobject)
+{
+	GdsRenderGui *self;
+
+	self = RENDERER_GUI(gobject);
+
+	clear_lib_list(&self->gds_libraries);
+
+	g_clear_object(&self->cell_tree_view);
+	g_clear_object(&self->convert_button);
+	g_clear_object(&self->layer_selector);
+	g_clear_object(&self->cell_tree_store);
+	g_clear_object(&self->cell_filter);
+	g_clear_object(&self->cell_search_entry);
+	g_clear_object(&self->activity_status_bar);
+	g_clear_object(&self->palette);
+	g_clear_object(&self->load_layer_button);
+	g_clear_object(&self->save_layer_button);
+	g_clear_object(&self->open_button);
+	g_clear_object(&self->select_all_button);
+
+	if (self->main_window) {
+		g_signal_handlers_destroy(self->main_window);
+		gtk_widget_destroy(GTK_WIDGET(self->main_window));
+		self->main_window = NULL;
+	}
+
+	/* Chain up */
+	G_OBJECT_CLASS(gds_render_gui_parent_class)->dispose(gobject);
+}
+
+static void gds_render_gui_class_init(GdsRenderGuiClass *klass)
+{
+	GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
+
+	gds_render_gui_signals[SIGNAL_WINDOW_CLOSED] =
+			g_signal_newv("window-closed", RENDERER_TYPE_GUI,
+				      G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE,
+				      NULL,
+				      NULL,
+				      NULL,
+				      NULL,
+				      G_TYPE_NONE,
+				      0,
+				      NULL);
+
+	gobject_class->dispose = gds_render_gui_dispose;
+}
+
+/**
+ * @brief Callback for the 'select all layers'-button
+ * @param button Button that triggered the event
+ * @param user_data the GdsrenderGui object containing the main-window the button is placed in
+ */
+static void on_select_all_layers_clicked(GtkWidget *button, gpointer user_data)
+{
+	GdsRenderGui *gui;
+	(void)button;
+
+	gui = RENDERER_GUI(user_data);
+	layer_selector_select_all_layers(gui->layer_selector, TRUE);
+}
+
+static void auto_naming_clicked(GtkWidget *button, gpointer user_data)
+{
+	GdsRenderGui *gui;
+	GtkDialog *dialog;
+	gboolean overwrite;
+	int dialog_result;
+	(void)button;
+
+	gui = RENDERER_GUI(user_data);
+
+	/* Don't do anything if the selector is empty. */
+	if (!layer_selector_contains_elements(gui->layer_selector))
+		return;
+
+	/* Ask for overwrite */
+	dialog = GTK_DIALOG(gtk_message_dialog_new(gui->main_window, GTK_DIALOG_USE_HEADER_BAR, GTK_MESSAGE_QUESTION,
+						   GTK_BUTTONS_YES_NO, "Overwrite existing layer names?"));
+	dialog_result = gtk_dialog_run(dialog);
+	switch (dialog_result) {
+	case GTK_RESPONSE_YES:
+		overwrite = TRUE;
+		break;
+	case GTK_RESPONSE_NO: /* Expected fallthrough */
+	default:
+		overwrite = FALSE;
+		break;
+	}
+	gtk_widget_destroy(GTK_WIDGET(dialog));
+
+	layer_selector_auto_name_layers(gui->layer_selector, overwrite);
+}
+
+GtkWindow *gds_render_gui_get_main_window(GdsRenderGui *gui)
+{
+	return gui->main_window;
+}
+
+static void gds_render_gui_init(GdsRenderGui *self)
+{
+	GtkBuilder *main_builder;
+	GtkWidget *listbox;
+	GtkHeaderBar *header_bar;
+	GtkWidget *sort_up_button;
+	GtkWidget *sort_down_button;
+	GtkWidget *activity_bar_box;
+	GtkWidget *auto_color_button;
+	GtkWidget *auto_naming_button;
+
+	main_builder = gtk_builder_new_from_resource("/gui/main.glade");
+
+	self->cell_tree_view = GTK_TREE_VIEW(gtk_builder_get_object(main_builder, "cell-tree"));
+	self->cell_search_entry = GTK_WIDGET(gtk_builder_get_object(main_builder, "cell-search"));
+
+	gds_render_gui_setup_cell_selector(self);
+
+	self->main_window = GTK_WINDOW(gtk_builder_get_object(main_builder, "main-window"));
+	self->open_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-load-gds"));
+	g_signal_connect(self->open_button,
+			 "clicked", G_CALLBACK(on_load_gds), (gpointer)self);
+
+	self->convert_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "convert-button"));
+	g_signal_connect(self->convert_button, "clicked", G_CALLBACK(on_convert_clicked), (gpointer)self);
+
+	listbox = GTK_WIDGET(gtk_builder_get_object(main_builder, "layer-list"));
+	/* Create layer selector */
+	self->layer_selector = layer_selector_new(GTK_LIST_BOX(listbox));
+
+	activity_bar_box = GTK_WIDGET(gtk_builder_get_object(main_builder, "activity-bar"));
+
+	/* Callback for selection change of cell selector */
+	g_signal_connect(G_OBJECT(gtk_tree_view_get_selection(self->cell_tree_view)), "changed",
+			 G_CALLBACK(cell_selection_changed), self);
+	g_signal_connect(self->cell_tree_view, "row-activated", G_CALLBACK(cell_tree_view_activated), self);
+
+	/* Set version in main window subtitle */
+	header_bar = GTK_HEADER_BAR(gtk_builder_get_object(main_builder, "header-bar"));
+	gtk_header_bar_set_subtitle(header_bar, _app_version_string);
+
+	/* Get layer sorting buttons and set callbacks */
+	sort_up_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-up-sort"));
+	sort_down_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-down-sort"));
+
+	g_signal_connect(sort_up_button, "clicked", G_CALLBACK(sort_up_callback), self);
+	g_signal_connect(sort_down_button, "clicked", G_CALLBACK(sort_down_callback), self);
+
+	/* Set buttons for loading and saving */
+	self->load_layer_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-load-mapping"));
+	self->save_layer_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-save-mapping"));
+	layer_selector_set_load_mapping_button(self->layer_selector, self->load_layer_button, self->main_window);
+	layer_selector_set_save_mapping_button(self->layer_selector, self->save_layer_button, self->main_window);
+
+	/* Connect delete-event */
+	g_signal_connect(GTK_WIDGET(self->main_window), "delete-event",
+			 G_CALLBACK(on_window_close), self);
+
+	/* Create and apply ActivityBar */
+	self->activity_status_bar = activity_bar_new();
+	gtk_container_add(GTK_CONTAINER(activity_bar_box), GTK_WIDGET(self->activity_status_bar));
+	gtk_widget_show(GTK_WIDGET(self->activity_status_bar));
+
+	/* Create color palette */
+	self->palette = color_palette_new_from_resource("/data/color-palette.txt");
+	auto_color_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "auto-color-button"));
+	g_signal_connect(auto_color_button, "clicked", G_CALLBACK(on_auto_color_clicked), self);
+
+
+	/* Set default conversion/rendering settings */
+	self->render_dialog_settings.scale = 1000;
+	self->render_dialog_settings.renderer = RENDERER_LATEX_TIKZ;
+	self->render_dialog_settings.tex_pdf_layers = FALSE;
+	self->render_dialog_settings.tex_standalone = FALSE;
+
+	/* Get select all button and connect callback */
+	self->select_all_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-select-all"));
+	g_signal_connect(self->select_all_button, "clicked", G_CALLBACK(on_select_all_layers_clicked), self);
+
+	/* Setup auto naming button */
+	auto_naming_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-auto-name"));
+	g_signal_connect(auto_naming_button, "clicked", G_CALLBACK(auto_naming_clicked), self);
+
+	g_object_unref(main_builder);
+
+	/* Setup default button sensibility data */
+	self->button_state_data.rendering_active = FALSE;
+	self->button_state_data.valid_cell_selected = FALSE;
+
+	/* Reference all objects referenced by this object */
+	g_object_ref(self->activity_status_bar);
+	g_object_ref(self->main_window);
+	g_object_ref(self->cell_tree_view);
+	g_object_ref(self->convert_button);
+	/* g_object_ref(self->layer_selector); <= This is already referenced by the _new() function */
+	g_object_ref(self->cell_search_entry);
+	/* g_object_ref(self->palette); */
+	g_object_ref(self->open_button);
+	g_object_ref(self->load_layer_button);
+	g_object_ref(self->save_layer_button);
+	g_object_ref(self->select_all_button);
+}
+
+GdsRenderGui *gds_render_gui_new()
+{
+	return RENDERER_GUI(g_object_new(RENDERER_TYPE_GUI, NULL));
+}
+
+/** @} */

gds-utils/gds-parser.c

@@ -14,31 +14,52 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
  */
 
-/*
+/**
+ * @file gds-parser.c
+ * @brief Implementation of the GDS-Parser
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ *
  * What's missing? - A lot:
- * Support for Boxes
  * Support for 4 Byte real
  * Support for pathtypes
  * Support for datatypes (only layer so far)
  * etc...
  */
 
+/**
+ * @addtogroup GDS-Utilities
+ * @{
+ */
 
-#include "gds-parser.h"
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdbool.h>
 #include <math.h>
 #include <cairo.h>
+#include <glib/gi18n.h>
 
-#define GDS_ERROR(fmt, ...) printf("[PARSE_ERROR] " fmt "\n", ##__VA_ARGS__)
-#define GDS_WARN(fmt, ...) printf("[PARSE_WARNING] " fmt "\n", ##__VA_ARGS__)
+#include <gds-render/gds-utils/gds-parser.h>
 
-enum record {
+/**
+ * @brief Default units assumed for library.
+ * @note This value is usually overwritten with the value defined in the library.
+ */
+#define GDS_DEFAULT_UNITS (10E-9)
+
+#define GDS_ERROR(fmt, ...) printf("[PARSE_ERROR] " fmt "\n", ##__VA_ARGS__) /**< @brief Print GDS error*/
+#define GDS_WARN(fmt, ...) printf("[PARSE_WARNING] " fmt "\n", ##__VA_ARGS__) /**< @brief Print GDS warning */
+
+#if GDS_PRINT_DEBUG_INFOS
+	/**< @brief standard printf. But can be disabled in code. */
+	#define GDS_INF(fmt, ...) printf(fmt, ##__VA_ARGS__)
+#else
+	#define GDS_INF(fmt, ...)
+#endif
+enum gds_record {
 	INVALID = 0x0000,
 	HEADER = 0x0002,
 	BGNLIB = 0x0102,
@@ -59,10 +80,37 @@ enum record {
 	STRANS = 0x1A01,
 	BOX = 0x2D00,
 	LAYER = 0x0D02,
+	DATATYPE = 0x0E02,
 	WIDTH = 0x0F03,
-	PATHTYPE = 0x2102
+	PATHTYPE = 0x2102,
+	COLROW = 0x1302,
+	AREF = 0x0B00
 };
 
+/**
+ * @brief Struct representing an array instantiation.
+ *
+ * This struct is defined locally because it is not exposed to the outside of the
+ * parser. Array references are internally converted to a bunch of standard @ref gds_cell_instance elements.
+ */
+struct gds_cell_array_instance {
+	char ref_name[CELL_NAME_MAX]; /**< @brief Name of referenced cell */
+	struct gds_cell *cell_ref; /**< @brief Referenced gds_cell structure */
+	struct gds_point control_points[3]; /**< @brief The three control points */
+	int flipped; /**< @brief Mirror each instance on x-axis before rotation */
+	double angle; /**< @brief Angle of rotation for each instance (counter clockwise) in degrees */
+	double magnification; /**< @brief Magnification of each instance */
+	int columns; /**< @brief Column count */
+	int rows; /**< @brief Row count */
+};
+
+/**
+ * @brief Name cell reference
+ * @param cell_inst Cell reference
+ * @param bytes Length of name
+ * @param data Name
+ * @return 0 if successful
+ */
 static int name_cell_ref(struct gds_cell_instance *cell_inst,
 			 unsigned int bytes, char *data)
 {
@@ -73,7 +121,7 @@ static int name_cell_ref(struct gds_cell_instance *cell_inst,
 		return -1;
 	}
 	data[bytes] = 0; // Append '0'
-	len = strlen(data);
+	len = (int)strlen(data);
 	if (len > CELL_NAME_MAX-1) {
 		GDS_ERROR("Cell name '%s' too long: %d\n", data, len);
 		return -1;
@@ -81,11 +129,46 @@ static int name_cell_ref(struct gds_cell_instance *cell_inst,
 
 	/* else: */
 	strcpy(cell_inst->ref_name, data);
-	printf("\tCell referenced: %s\n", cell_inst->ref_name);
+	GDS_INF("\tCell referenced: %s\n", cell_inst->ref_name);
 
 	return 0;
 }
 
+/**
+ * @brief Name cell reference
+ * @param cell_inst Cell reference
+ * @param bytes Length of name
+ * @param data Name
+ * @return 0 if successful
+ */
+static int name_array_cell_ref(struct gds_cell_array_instance *cell_inst,
+				unsigned int bytes, char *data)
+{
+	int len;
+
+	if (cell_inst == NULL) {
+		GDS_ERROR("Naming array cell ref with no opened cell ref");
+		return -1;
+	}
+	data[bytes] = 0; // Append '0'
+	len = (int)strlen(data);
+	if (len > CELL_NAME_MAX-1) {
+		GDS_ERROR("Cell name '%s' too long: %d\n", data, len);
+		return -1;
+	}
+
+	/* else: */
+	strcpy(cell_inst->ref_name, data);
+	GDS_INF("\tCell referenced: %s\n", cell_inst->ref_name);
+
+	return 0;
+}
+
+/**
+ * @brief Convert GDS 8-byte real to double
+ * @param data 8 Byte GDS real
+ * @return result
+ */
 static double gds_convert_double(const char *data)
 {
 	bool sign_bit;
@@ -102,7 +185,7 @@ static double gds_convert_double(const char *data)
 		if (data[i] != 0)
 			break;
 		if (i == 7) {
-			/* 7 bytes all 0 */
+			/* All 8 bytes are 0 */
 			return 0.0;
 		}
 	}
@@ -126,12 +209,17 @@ static double gds_convert_double(const char *data)
 	return ret_val;
 }
 
+/**
+ * @brief Convert GDS INT32 to int
+ * @param data Buffer containing the int
+ * @return result
+ */
 static signed int gds_convert_signed_int(const char *data)
 {
 	int ret;
 
 	if (!data) {
-		GDS_ERROR("This should not happen");
+		GDS_ERROR("Conversion from GDS data to signed int failed.");
 		return 0;
 	}
 
@@ -142,6 +230,11 @@ static signed int gds_convert_signed_int(const char *data)
 	return ret;
 }
 
+/**
+ * @brief Convert GDS INT16 to int16
+ * @param data Buffer containing the INT16
+ * @return result
+ */
 static int16_t gds_convert_signed_int16(const char *data)
 {
 	if (!data) {
@@ -152,7 +245,12 @@ static int16_t gds_convert_signed_int16(const char *data)
 			(((int16_t)(data[1]) & 0xFF) <<  0));
 }
 
-static uint16_t gds_convert_unsigend_int16(const char *data)
+/**
+ * @brief Convert GDS UINT16 String to uint16
+ * @param data Buffer containing the uint16
+ * @return result
+ */
+static uint16_t gds_convert_unsigned_int16(const char *data)
 {
 	if (!data) {
 		GDS_ERROR("This should not happen");
@@ -162,6 +260,12 @@ static uint16_t gds_convert_unsigend_int16(const char *data)
 			(((uint16_t)(data[1]) & 0xFF) <<  0));
 }
 
+/**
+ * @brief Append library to list
+ * @param curr_list List containing gds_library elements. May be NULL.
+ * @param library_ptr Return of newly created library.
+ * @return Newly created list pointer
+ */
 static GList *append_library(GList *curr_list, struct gds_library **library_ptr)
 {
 	struct gds_library *lib;
@@ -170,7 +274,7 @@ static GList *append_library(GList *curr_list, struct gds_library **library_ptr)
 	if (lib) {
 		lib->cells = NULL;
 		lib->name[0] = 0;
-		lib->unit_to_meters = 1; // Default. Will be overwritten
+		lib->unit_in_meters = GDS_DEFAULT_UNITS; // Default. Will be overwritten
 		lib->cell_names = NULL;
 	} else
 		return NULL;
@@ -180,7 +284,14 @@ static GList *append_library(GList *curr_list, struct gds_library **library_ptr)
 	return g_list_append(curr_list, lib);
 }
 
-static GList *append_graphics(GList *curr_list, enum graphics_type type,
+/**
+ * @brief Prepend graphics to list
+ * @param curr_list List containing gds_graphics elements. May be NULL
+ * @param type Type of graphics
+ * @param graphics_ptr newly created graphic is written here
+ * @return new list pointer
+ */
+static __attribute__((warn_unused_result)) GList *prepend_graphics(GList *curr_list, enum graphics_type type,
 			      struct gds_graphics **graphics_ptr)
 {
 	struct gds_graphics *gfx;
@@ -199,9 +310,16 @@ static GList *append_graphics(GList *curr_list, enum graphics_type type,
 	if (graphics_ptr)
 		*graphics_ptr = gfx;
 
-	return g_list_append(curr_list, gfx);
+	return g_list_prepend(curr_list, gfx);
 }
 
+/**
+ * @brief Appends vertext List
+ * @param curr_list List containing gds_point elements. May be NULL.
+ * @param x x-coordinate of new point
+ * @param y y-coordinate of new point
+ * @return new Pointer to List.
+ */
 static GList *append_vertex(GList *curr_list, int x, int y)
 {
 	struct gds_point *vertex;
@@ -215,6 +333,14 @@ static GList *append_vertex(GList *curr_list, int x, int y)
 	return g_list_append(curr_list, vertex);
 }
 
+/**
+ * @brief append_cell Append a gds_cell to a list
+ *
+ * Usage similar to append_cell_ref().
+ * @param curr_list List containing gds_cell elements. May be NULL
+ * @param cell_ptr newly created cell
+ * @return new pointer to list
+ */
 static GList *append_cell(GList *curr_list, struct gds_cell **cell_ptr)
 {
 	struct gds_cell *cell;
@@ -224,6 +350,9 @@ static GList *append_cell(GList *curr_list, struct gds_cell **cell_ptr)
 		cell->child_cells = NULL;
 		cell->graphic_objs = NULL;
 		cell->name[0] = 0;
+		cell->parent_library = NULL;
+		cell->checks.unresolved_child_count = GDS_CELL_CHECK_NOT_RUN;
+		cell->checks.affected_by_reference_loop = GDS_CELL_CHECK_NOT_RUN;
 	} else
 		return NULL;
 	/* return cell */
@@ -233,6 +362,14 @@ static GList *append_cell(GList *curr_list, struct gds_cell **cell_ptr)
 	return g_list_append(curr_list, cell);
 }
 
+/**
+ * @brief Append a cell reference to the reference GList.
+ *
+ * Appends a new gds_cell_instance to \p curr_list and returns the new element via \p instance_ptr
+ * @param curr_list List of gds_cell_instance elements. May be NULL
+ * @param instance_ptr newly created element
+ * @return new GList pointer
+ */
 static GList *append_cell_ref(GList *curr_list, struct gds_cell_instance **instance_ptr)
 {
 	struct gds_cell_instance *inst;
@@ -242,9 +379,9 @@ static GList *append_cell_ref(GList *curr_list, struct gds_cell_instance **insta
 	if (inst) {
 		inst->cell_ref = NULL;
 		inst->ref_name[0] = 0;
-		inst->magnification = 1;
+		inst->magnification = 1.0;
 		inst->flipped = 0;
-		inst->angle = 0;
+		inst->angle = 0.0;
 	} else
 		return NULL;
 
@@ -254,6 +391,13 @@ static GList *append_cell_ref(GList *curr_list, struct gds_cell_instance **insta
 	return g_list_append(curr_list, inst);
 }
 
+/**
+ * @brief Name a gds_library
+ * @param current_library Library to name
+ * @param bytes Lenght of name
+ * @param data Name
+ * @return 0 if successful
+ */
 static int name_library(struct gds_library *current_library,
 			unsigned int bytes, char *data)
 {
@@ -265,18 +409,26 @@ static int name_library(struct gds_library *current_library,
 	}
 
 	data[bytes] = 0; // Append '0'
-	len = strlen(data);
+	len = (int)strlen(data);
 	if (len > CELL_NAME_MAX-1) {
 		GDS_ERROR("Library name '%s' too long: %d\n", data, len);
 		return -1;
 	}
 
 	strcpy(current_library->name, data);
-	printf("Named library: %s\n", current_library->name);
+	GDS_INF("Named library: %s\n", current_library->name);
 
 	return 0;
 }
 
+/**
+ * @brief Names a gds_cell
+ * @param cell Cell to name
+ * @param bytes Length of name
+ * @param data Name
+ * @param lib Library in which \p cell is located
+ * @return 0 id successful
+ */
 static int name_cell(struct gds_cell *cell, unsigned int bytes,
 		     char *data, struct gds_library *lib)
 {
@@ -287,14 +439,14 @@ static int name_cell(struct gds_cell *cell, unsigned int bytes,
 		return -1;
 	}
 	data[bytes] = 0; // Append '0'
-	len = strlen(data);
+	len = (int)strlen(data);
 	if (len > CELL_NAME_MAX-1) {
 		GDS_ERROR("Cell name '%s' too long: %d\n", data, len);
 		return -1;
 	}
 
 	strcpy(cell->name, data);
-	printf("Named cell: %s\n", cell->name);
+	GDS_INF("Named cell: %s\n", cell->name);
 
 	/* Append cell name to lib's list of names */
 	lib->cell_names = g_list_append(lib->cell_names, cell->name);
@@ -302,7 +454,13 @@ static int name_cell(struct gds_cell *cell, unsigned int bytes,
 	return 0;
 }
 
-
+/**
+ * @brief Search for cell reference \p gcell_ref in \p glibrary
+ *
+ * Search cell referenced by \p gcell_ref inside \p glibrary and update gds_cell_instance::cell_ref with found #gds_cell
+ * @param gcell_ref gpointer cast of struct gds_cell_instance *
+ * @param glibrary gpointer cast of struct gds_library *
+ */
 static void parse_reference_list(gpointer gcell_ref, gpointer glibrary)
 {
 	struct gds_cell_instance *inst = (struct gds_cell_instance *)gcell_ref;
@@ -310,7 +468,7 @@ static void parse_reference_list(gpointer gcell_ref, gpointer glibrary)
 	GList *cell_item;
 	struct gds_cell *cell;
 
-	printf("\t\t\tReference: %s: ", inst->ref_name);
+	GDS_INF("\t\t\tReference: %s: ", inst->ref_name);
 	/* Find cell */
 	for (cell_item = lib->cells; cell_item != NULL;
 	     cell_item = cell_item->next) {
@@ -318,36 +476,57 @@ static void parse_reference_list(gpointer gcell_ref, gpointer glibrary)
 		cell = (struct gds_cell *)cell_item->data;
 		/* Check if cell is found */
 		if (!strcmp(cell->name, inst->ref_name)) {
-			printf("found\n");
+			GDS_INF("found\n");
 			/* update reference link */
 			inst->cell_ref = cell;
 			return;
 		}
 	}
 
-	printf("MISSING!\n");
+	GDS_INF("MISSING!\n");
 	GDS_WARN("referenced cell could not be found in library");
 }
 
+/**
+ * @brief Scans cell references inside cell
+ This function searches all the references in \p gcell and updates the gds_cell_instance::cell_ref field in each instance
+ * @param gcell pointer cast of #gds_cell *
+ * @param library Library where the cell references are searched in
+ */
 static void scan_cell_reference_dependencies(gpointer gcell, gpointer library)
 {
 	struct gds_cell *cell = (struct gds_cell *)gcell;
 
-	printf("\tScanning cell: %s\n", cell->name);
+	GDS_INF("\tScanning cell: %s\n", cell->name);
 
 	/* Scan all library references */
 	g_list_foreach(cell->child_cells, parse_reference_list, library);
 
 }
 
+/**
+ * @brief Scans library's cell references
+ *
+ * This function searches all the references between cells and updates the gds_cell_instance::cell_ref field in each instance
+ * @param library_list_item List containing #gds_library elements
+ * @param user not used
+ */
 static void scan_library_references(gpointer library_list_item, gpointer user)
 {
 	struct gds_library *lib = (struct gds_library *)library_list_item;
+	(void)user;
 
-	printf("Scanning Library: %s\n", lib->name);
+	GDS_INF("Scanning Library: %s\n", lib->name);
 	g_list_foreach(lib->cells, scan_cell_reference_dependencies, lib);
 }
 
+/**
+ * @brief gds_parse_date
+ * @param buffer Buffer that contains the GDS Date field
+ * @param length Length of \p buffer
+ * @param mod_date Modification Date
+ * @param access_date Last Access Date
+ */
 static void gds_parse_date(const char *buffer, int length, struct gds_time_field *mod_date, struct gds_time_field *access_date)
 {
 
@@ -364,17 +543,17 @@ static void gds_parse_date(const char *buffer, int length, struct gds_time_field
 	}
 
 	for (temp_date = mod_date; 1; temp_date = access_date) {
-		temp_date->year = gds_convert_unsigend_int16(buffer);
+		temp_date->year = gds_convert_unsigned_int16(buffer);
 		buffer += 2;
-		temp_date->month = gds_convert_unsigend_int16(buffer);
+		temp_date->month = gds_convert_unsigned_int16(buffer);
 		buffer += 2;
-		temp_date->day = gds_convert_unsigend_int16(buffer);
+		temp_date->day = gds_convert_unsigned_int16(buffer);
 		buffer += 2;
-		temp_date->hour = gds_convert_unsigend_int16(buffer);
+		temp_date->hour = gds_convert_unsigned_int16(buffer);
 		buffer += 2;
-		temp_date->minute = gds_convert_unsigend_int16(buffer);
+		temp_date->minute = gds_convert_unsigned_int16(buffer);
 		buffer += 2;
-		temp_date->second = gds_convert_unsigend_int16(buffer);
+		temp_date->second = gds_convert_unsigned_int16(buffer);
 		buffer += 2;
 
 		if (temp_date == access_date)
@@ -382,6 +561,62 @@ static void gds_parse_date(const char *buffer, int length, struct gds_time_field
 	}
 }
 
+/**
+ * @brief Convert AREF to a bunch of SREFs and append them to \p container_cell
+ *
+ * This function converts a single array reference (\p aref) to gds_cell_array_instance::rows * gds_cell_array_instance::columns
+ * single references (SREFs). See @ref gds_cell_instance.
+ *
+ * Both gds_cell_array_instance::rows and gds_cell_array_instance::columns must be larger than zero.
+ *
+ * @param[in] aref Array reference to parse
+ * @param[in] container_cell cell to add the converted single references to.
+ */
+static void convert_aref_to_sref(struct gds_cell_array_instance *aref, struct gds_cell *container_cell)
+{
+	struct gds_point origin;
+	struct gds_point row_shift_vector;
+	struct gds_point col_shift_vector;
+	struct gds_cell_instance *sref_inst = NULL;
+	int col;
+	int row;
+
+	if (!aref || !container_cell)
+		return;
+
+	if (aref->columns == 0 || aref->rows == 0) {
+		GDS_ERROR("Conversion of array instance aborted. No rows / columns.");
+		return;
+	}
+	origin.x = aref->control_points[0].x;
+	origin.y = aref->control_points[0].y;
+
+	row_shift_vector.x = (aref->control_points[2].x - origin.x) / aref->rows;
+	row_shift_vector.y = (aref->control_points[2].y - origin.y) / aref->rows;
+	col_shift_vector.x = (aref->control_points[1].x - origin.x) / aref->columns;
+	col_shift_vector.y = (aref->control_points[1].y - origin.y) / aref->columns;
+
+	/* Iterate over columns and rows */
+	for (col = 0; col < aref->columns; col++) {
+		for (row = 0; row < aref->rows; row++) {
+			/* Create new instance for this row/column and configure data */
+			container_cell->child_cells = append_cell_ref(container_cell->child_cells, &sref_inst);
+			if (!sref_inst) {
+				GDS_ERROR("Appending cell ref failed!");
+				continue;
+			}
+
+			sref_inst->angle = aref->angle;
+			sref_inst->magnification = aref->magnification;
+			sref_inst->flipped = aref->flipped;
+			strncpy(sref_inst->ref_name, aref->ref_name, CELL_NAME_MAX);
+			sref_inst->origin.x = origin.x + row_shift_vector.x * row + col_shift_vector.x * col;
+			sref_inst->origin.y = origin.y + row_shift_vector.y * row + col_shift_vector.y * col;
+		}
+	}
+	GDS_INF("Converted AREF to SREFs\n");
+}
+
 int parse_gds_from_file(const char *filename, GList **library_list)
 {
 	char *workbuff;
@@ -390,11 +625,13 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 	int run = 1;
 	FILE *gds_file = NULL;
 	uint16_t rec_data_length;
-	enum record rec_type;
+	enum gds_record rec_type;
 	struct gds_library *current_lib = NULL;
 	struct gds_cell *current_cell = NULL;
 	struct gds_graphics *current_graphics = NULL;
 	struct gds_cell_instance *current_s_reference = NULL;
+	struct gds_cell_array_instance *current_a_reference = NULL;
+	struct gds_cell_array_instance temp_a_reference;
 	int x, y;
 	////////////
 	GList *lib_list;
@@ -431,7 +668,7 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 			break;
 		}
 
-		rec_data_length = gds_convert_unsigend_int16(workbuff);
+		rec_data_length = gds_convert_unsigned_int16(workbuff);
 
 		if (rec_data_length < 4) {
 			/* Possible Zero-Padding: */
@@ -454,7 +691,8 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 			GDS_ERROR("Unexpected end of file");
 			break;
 		}
-		rec_type = gds_convert_unsigend_int16(workbuff);
+		rec_type = gds_convert_unsigned_int16(workbuff);
+
 
 		/* if begin: Allocate structures */
 		switch (rec_type) {
@@ -466,7 +704,7 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 				break;
 
 			}
-			printf("Entering Lib\n");
+			GDS_INF("Entering Lib\n");
 			break;
 		case ENDLIB:
 			if (current_lib == NULL) {
@@ -482,16 +720,24 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 				break;
 			}
 			current_lib = NULL;
-			printf("Leaving Library\n");
+			GDS_INF("Leaving Library\n");
 			break;
 		case BGNSTR:
+			if (current_lib == NULL) {
+				GDS_ERROR("Defining Cell outside of library!\n");
+				run = -4;
+				break;
+			}
 			current_lib->cells = append_cell(current_lib->cells, &current_cell);
 			if (current_lib->cells == NULL) {
 				GDS_ERROR("Allocating memory failed");
 				run = -3;
 				break;
 			}
-			printf("Entering Cell\n");
+
+			current_cell->parent_library = current_lib;
+
+			GDS_INF("Entering cell\n");
 			break;
 		case ENDSTR:
 			if (current_cell == NULL) {
@@ -506,7 +752,7 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 				break;
 			}
 			current_cell = NULL;
-			printf("Leaving Cell\n");
+			GDS_INF("Leaving Cell\n");
 			break;
 		case BOX:
 		case BOUNDARY:
@@ -515,19 +761,21 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 				run = -3;
 				break;
 			}
-			current_cell->graphic_objs = append_graphics(current_cell->graphic_objs,
-								     (rec_type == BOUNDARY ? GRAPHIC_POLYGON : GRAPHIC_BOX),
+			current_cell->graphic_objs = prepend_graphics(current_cell->graphic_objs,
+								     (rec_type == BOUNDARY
+									? GRAPHIC_POLYGON
+									: GRAPHIC_BOX),
 								     &current_graphics);
 			if (current_cell->graphic_objs == NULL) {
 				GDS_ERROR("Memory allocation failed");
 				run = -4;
 				break;
 			}
-			printf("\tEntering boundary/Box\n");
+			GDS_INF("\tEntering boundary/Box\n");
 			break;
 		case SREF:
 			if (current_cell == NULL) {
-				GDS_ERROR("Path outside of cell");
+				GDS_ERROR("Cell Reference outside of cell");
 				run = -3;
 				break;
 			}
@@ -539,7 +787,7 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 				break;
 			}
 
-			printf("\tEntering reference\n");
+			GDS_INF("\tEntering reference\n");
 			break;
 		case PATH:
 			if (current_cell == NULL) {
@@ -547,25 +795,30 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 				run = -3;
 				break;
 			}
-			current_cell->graphic_objs = append_graphics(current_cell->graphic_objs,
+			current_cell->graphic_objs = prepend_graphics(current_cell->graphic_objs,
 								     GRAPHIC_PATH, &current_graphics);
 			if (current_cell->graphic_objs == NULL) {
 				GDS_ERROR("Memory allocation failed");
 				run = -4;
 				break;
 			}
-			printf("\tEntering Path\n");
+			GDS_INF("\tEntering Path\n");
 			break;
 		case ENDEL:
 			if (current_graphics != NULL) {
-
-				printf("\tLeaving %s\n", (current_graphics->gfx_type == GRAPHIC_POLYGON ? "boundary" : "path"));
+				GDS_INF("\tLeaving %s\n", (current_graphics->gfx_type == GRAPHIC_POLYGON ? "boundary" : "path"));
 				current_graphics = NULL;
 			}
 			if (current_s_reference != NULL) {
-				printf("\tLeaving Reference\n");
+				GDS_INF("\tLeaving Reference\n");
 				current_s_reference = NULL;
 			}
+			if (current_a_reference != NULL) {
+				GDS_INF("\tLeaving Array Reference\n");
+				convert_aref_to_sref(current_a_reference, current_cell);
+				current_a_reference = NULL;
+			}
+
 			break;
 		case XY:
 			if (current_graphics) {
@@ -574,28 +827,58 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 				if (rec_data_length != 8) {
 					GDS_WARN("Instance has weird coordinates. Rendered output might be screwed!");
 				}
+			} else if (current_a_reference) {
+				if (rec_data_length != (3*(4+4)))
+					GDS_WARN("Array instance has weird coordinates. Rendered output might be screwed!");
+			}
+			break;
+		case AREF:
+			if (current_cell == NULL) {
+				GDS_ERROR("Cell array reference outside of cell");
+				run = -3;
+				break;
 			}
 
-			break;
+			if (current_a_reference != NULL) {
+				GDS_ERROR("Recursive cell array reference");
+				run = -3;
+				break;
+			}
 
+			GDS_INF("Entering Array Reference\n");
+
+			/* Array references are coverted after fully declared. Therefore,
+			 * only a static buffer is needed
+			 */
+			current_a_reference = &temp_a_reference;
+			current_a_reference->ref_name[0] = '\0';
+			current_a_reference->angle = 0.0;
+			current_a_reference->magnification = 1.0;
+			current_a_reference->flipped = 0;
+			current_a_reference->rows = 0;
+			current_a_reference->columns = 0;
+			break;
+		case COLROW:
 		case MAG:
-			break;
 		case ANGLE:
-			break;
 		case STRANS:
-			break;
 		case WIDTH:
-			break;
 		case PATHTYPE:
+		case UNITS:
+		case LIBNAME:
+		case SNAME:
+		case LAYER:
+		case DATATYPE:
+		case STRNAME:
 			break;
 		default:
-			//GDS_WARN("Record: %04x, len: %u", (unsigned int)rec_type, (unsigned int)rec_data_length);
+			GDS_INF("Unhandled Record: %04x, len: %u\n", (unsigned int)rec_type, (unsigned int)rec_data_length);
 			break;
 		} /* switch(rec_type) */
 
 
 		/* No Data -> No Processing, go back to top */
-		if (!rec_data_length) continue;
+		if (!rec_data_length || run != 1) continue;
 
 		read = fread(workbuff, sizeof(char), rec_data_length, gds_file);
 
@@ -607,9 +890,8 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 		}
 
 		switch (rec_type) {
-
+		case AREF:
 		case HEADER:
-		case UNITS:
 		case ENDLIB:
 		case ENDSTR:
 		case BOUNDARY:
@@ -620,6 +902,34 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 		case INVALID:
 			break;
 
+		case COLROW:
+			if (!current_a_reference) {
+				GDS_ERROR("COLROW record defined outside of array instance");
+				break;
+			}
+			if (rec_data_length != 4 || read != 4) {
+				GDS_ERROR("COLUMN/ROW count record contains too few data. Won't set column and row counts (%d, %d)",
+					  rec_data_length, read);
+				break;
+			}
+			current_a_reference->columns = (int)gds_convert_signed_int16(&workbuff[0]);
+			current_a_reference->rows = (int)gds_convert_signed_int16(&workbuff[2]);
+			GDS_INF("\tRows: %d\n\tColumns: %d\n", current_a_reference->rows, current_a_reference->columns);
+			break;
+		case UNITS:
+			if (!current_lib) {
+				GDS_WARN("Units defined outside of library!\n");
+				break;
+			}
+
+			if (rec_data_length != 16) {
+				GDS_WARN("Unit define incomplete. Will assume database unit of %E meters\n", current_lib->unit_in_meters);
+				break;
+			}
+
+			current_lib->unit_in_meters = gds_convert_double(&workbuff[8]);
+			GDS_INF("Length of database unit: %E meters\n", current_lib->unit_in_meters);
+			break;
 		case BGNLIB:
 			/* Parse date record */
 			gds_parse_date(workbuff, read, &current_lib->mod_time, &current_lib->access_time);
@@ -628,17 +938,17 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 			gds_parse_date(workbuff, read, &current_cell->mod_time, &current_cell->access_time);
 			break;
 		case LIBNAME:
-			name_library(current_lib, read, workbuff);
+			name_library(current_lib, (unsigned int)read, workbuff);
 			break;
 		case STRNAME:
-			name_cell(current_cell, read, workbuff, current_lib);
+			name_cell(current_cell, (unsigned int)read, workbuff, current_lib);
 			break;
 		case XY:
 			if (current_s_reference) {
 				/* Get origin of reference */
 				current_s_reference->origin.x = gds_convert_signed_int(workbuff);
 				current_s_reference->origin.y = gds_convert_signed_int(&workbuff[4]);
-				printf("\t\tSet origin to: %d/%d\n", current_s_reference->origin.x,
+				GDS_INF("\t\tSet origin to: %d/%d\n", current_s_reference->origin.x,
 				       current_s_reference->origin.y);
 			} else if (current_graphics) {
 				for (i = 0; i < read/8; i++) {
@@ -646,21 +956,37 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 					y = gds_convert_signed_int(&workbuff[i*8+4]);
 					current_graphics->vertices =
 							append_vertex(current_graphics->vertices, x, y);
-					printf("\t\tSet coordinate: %d/%d\n", x, y);
+					GDS_INF("\t\tSet coordinate: %d/%d\n", x, y);
 
 				}
+			} else if (current_a_reference) {
+				for (i = 0; i < 3; i++) {
+					x = gds_convert_signed_int(&workbuff[i*8]);
+					y = gds_convert_signed_int(&workbuff[i*8+4]);
+					current_a_reference->control_points[i].x = x;
+					current_a_reference->control_points[i].y = y;
+					GDS_INF("\tSet control point %d: %d/%d\n", i, x, y);
+				}
 			}
 			break;
 		case STRANS:
-			if (!current_s_reference) {
+			if (current_s_reference) {
+				current_s_reference->flipped = ((workbuff[0] & 0x80) ? 1 : 0);
+			} else if (current_a_reference) {
+				current_a_reference->flipped = ((workbuff[0] & 0x80) ? 1 : 0);
+			} else {
 				GDS_ERROR("Transformation defined outside of instance");
 				break;
 			}
-			current_s_reference->flipped = ((workbuff[0] & 0x80) ? 1 : 0);
 			break;
-
 		case SNAME:
-			name_cell_ref(current_s_reference, read, workbuff);
+			if (current_s_reference) {
+				name_cell_ref(current_s_reference, (unsigned int)read, workbuff);
+			} else if (current_a_reference) {
+				name_array_cell_ref(current_a_reference, (unsigned int)read, workbuff);
+			} else {
+				GDS_ERROR("Reference name set outside of cell reference");
+			}
 			break;
 		case WIDTH:
 			if (!current_graphics) {
@@ -677,7 +1003,17 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 			if (current_graphics->layer < 0) {
 				GDS_WARN("Layer negative!\n");
 			}
-			printf("\t\tAdded layer %d\n", (int)current_graphics->layer);
+			GDS_INF("\t\tAdded layer %d\n", (int)current_graphics->layer);
+			break;
+		case DATATYPE:
+			if (!current_graphics) {
+				GDS_WARN("Datatype has to be defined inside graphics object. Probably unknown object. Implement it yourself!");
+				break;
+			}
+			current_graphics->datatype = gds_convert_signed_int16(workbuff);
+			if (current_graphics->datatype < 0)
+				GDS_WARN("Datatype negative!");
+			GDS_INF("\t\tAdded datatype %d\n", (int)current_graphics->datatype);
 			break;
 		case MAG:
 			if (rec_data_length != 8) {
@@ -690,21 +1026,29 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 			}
 			if (current_s_reference != NULL) {
 				current_s_reference->magnification = gds_convert_double(workbuff);
-				printf("\t\tMagnification defined: %lf\n", current_s_reference->magnification);
+				GDS_INF("\t\tMagnification defined: %lf\n", current_s_reference->magnification);
+			}
+			if (current_a_reference != NULL) {
+				current_a_reference->magnification = gds_convert_double(workbuff);
+				GDS_INF("\t\tMagnification defined: %lf\n", current_a_reference->magnification);
 			}
 			break;
 		case ANGLE:
 			if (rec_data_length != 8) {
 				GDS_WARN("Angle is not an 8 byte real. Results may be wrong");
 			}
-			if (current_graphics != NULL && current_s_reference != NULL) {
+			if (current_graphics != NULL && current_s_reference != NULL && current_a_reference != NULL) {
 				GDS_ERROR("Open Graphics and Cell Reference\n\tMissing ENDEL?");
 				run = -6;
 				break;
 			}
 			if (current_s_reference != NULL) {
 				current_s_reference->angle = gds_convert_double(workbuff);
-				printf("\t\tAngle defined: %lf\n", current_s_reference->angle);
+				GDS_INF("\t\tAngle defined: %lf\n", current_s_reference->angle);
+			}
+			if (current_a_reference != NULL) {
+				current_a_reference->angle = gds_convert_double(workbuff);
+				GDS_INF("\t\tAngle defined: %lf\n", current_a_reference->angle);
 			}
 			break;
 		case PATHTYPE:
@@ -713,8 +1057,8 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 				break;
 			}
 			if (current_graphics->gfx_type == GRAPHIC_PATH) {
-				current_graphics->path_render_type = (int)gds_convert_signed_int16(workbuff);
-				printf("\t\tPathtype: %d\n", current_graphics->path_render_type);
+				current_graphics->path_render_type = (enum path_type)gds_convert_signed_int16(workbuff);
+				GDS_INF("\t\tPathtype: %d\n", current_graphics->path_render_type);
 			} else {
 				GDS_WARN("Path type defined inside non-path graphics object. Ignoring");
 			}
@@ -726,15 +1070,11 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 
 	fclose(gds_file);
 
-
 	if (!run) {
 		/* Iterate and find references to cells */
 		g_list_foreach(lib_list, scan_library_references, NULL);
 	}
 
-
-
-
 	*library_list = lib_list;
 
 	free(workbuff);
@@ -742,31 +1082,62 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 	return run;
 }
 
+/**
+ * @brief delete_cell_inst_element
+ * @param cell_inst
+ */
 static void delete_cell_inst_element(struct gds_cell_instance *cell_inst)
 {
-	free(cell_inst);
+	if (cell_inst)
+		free(cell_inst);
 }
 
+/**
+ * @brief delete_vertex
+ * @param vertex
+ */
 static void delete_vertex(struct gds_point *vertex)
 {
-	free(vertex);
+	if (vertex)
+		free(vertex);
 }
 
+/**
+ * @brief delete_graphics_obj
+ * @param gfx
+ */
 static void delete_graphics_obj(struct gds_graphics *gfx)
 {
+	if (!gfx)
+		return;
+
 	g_list_free_full(gfx->vertices, (GDestroyNotify)delete_vertex);
 	free(gfx);
 }
 
+/**
+ * @brief delete_cell_element
+ * @param cell
+ */
 static void delete_cell_element(struct gds_cell *cell)
 {
+	if (!cell)
+		return;
+
 	g_list_free_full(cell->child_cells, (GDestroyNotify)delete_cell_inst_element);
 	g_list_free_full(cell->graphic_objs, (GDestroyNotify)delete_graphics_obj);
 	free(cell);
 }
 
+/**
+ * @brief delete_library_element
+ * @param lib
+ */
 static void delete_library_element(struct gds_library *lib)
 {
+	if (!lib)
+		return;
+
 	g_list_free(lib->cell_names);
 	g_list_free_full(lib->cells, (GDestroyNotify)delete_cell_element);
 	free(lib);
@@ -774,9 +1145,15 @@ static void delete_library_element(struct gds_library *lib)
 
 int clear_lib_list(GList **library_list)
 {
+	if (!library_list)
+		return 0;
+
 	if (*library_list == NULL)
 		return 0;
+
 	g_list_free_full(*library_list, (GDestroyNotify)delete_library_element);
 	*library_list = NULL;
 	return 0;
 }
+
+/** @} */

gds-utils/gds-tree-checker.c

@@ -0,0 +1,211 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file gds-tree-checker.c
+ * @brief Checking functions of a cell tree
+ *
+ * This file contains checking functions for the GDS cell tree.
+ * These functions include checks if all child references could be resolved,
+ * and if the cell tree contains loops.
+ *
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup GDS-Utilities
+ * @{
+ */
+
+#include <stdio.h>
+#include <glib/gi18n.h>
+#include <gds-render/gds-utils/gds-tree-checker.h>
+
+int gds_tree_check_cell_references(struct gds_library *lib)
+{
+	GList *cell_iter;
+	struct gds_cell *cell;
+	GList *instance_iter;
+	struct  gds_cell_instance *cell_inst;
+	int total_unresolved_count = 0;
+
+	if (!lib)
+		return -1;
+
+	/* Iterate over all cells in library */
+	for (cell_iter = lib->cells; cell_iter != NULL; cell_iter = g_list_next(cell_iter)) {
+		cell = (struct gds_cell *)cell_iter->data;
+
+		/* Check if this list element is broken. This should never happen */
+		if (!cell) {
+			fprintf(stderr, _("Broken cell list item found. Will continue.\n"));
+			continue;
+		}
+
+		/* Reset the unresolved cell reference counter to 0 */
+		cell->checks.unresolved_child_count = 0;
+
+		/* Iterate through all child cell references and check if the references are set */
+		for (instance_iter = cell->child_cells; instance_iter != NULL;
+					instance_iter = g_list_next(instance_iter)) {
+			cell_inst = (struct gds_cell_instance *)instance_iter->data;
+
+			/* Check if broken. This should not happen */
+			if (!cell_inst) {
+				fprintf(stderr, _("Broken cell list item found in cell %s. Will continue.\n"),
+						cell->name);
+				continue;
+			}
+
+			/* Check if instance is valid; else increment "error" counter of cell */
+			if (!cell_inst->cell_ref) {
+				total_unresolved_count++;
+				cell->checks.unresolved_child_count++;
+			}
+		}
+	}
+
+	return total_unresolved_count;
+}
+
+/**
+ * @brief Check if list contains a cell
+ * @param list GList to check. May be a null pointer
+ * @param cell Cell to check for
+ * @return 0 if cell is not in list. 1 if cell is in list
+ */
+static int gds_tree_check_list_contains_cell(GList *list, struct gds_cell *cell)
+{
+	GList *iter;
+
+	for (iter = list; iter != NULL; iter = g_list_next(iter)) {
+		if ((struct gds_cell *)iter->data == cell)
+			return 1;
+	}
+
+	return 0;
+}
+
+/**
+ * @brief This function follows down the reference list of a cell and marks each visited subcell and detects loops
+ * @param cell_to_check The cell to check for reference loops
+ * @param visited_cells Pointer to list head. May be zero.
+ * @return 0 if no loops exist; error in processing: <0; loop found: >0
+ */
+static int gds_tree_check_iterate_ref_and_check(struct gds_cell *cell_to_check, GList **visited_cells)
+{
+	GList *ref_iter;
+	struct gds_cell_instance *ref;
+	struct gds_cell *sub_cell;
+	int res;
+
+	if (!cell_to_check)
+		return -1;
+
+	/* Check if this cell is already contained in visited cells. This indicates a loop */
+	if (gds_tree_check_list_contains_cell(*visited_cells, cell_to_check))
+		return 1;
+
+	/* Add cell to visited cell list */
+	*visited_cells = g_list_append(*visited_cells, (gpointer)cell_to_check);
+
+	/* Mark references and process sub cells */
+	for (ref_iter = cell_to_check->child_cells; ref_iter != NULL; ref_iter = g_list_next(ref_iter)) {
+		ref = (struct gds_cell_instance *)ref_iter->data;
+
+		if (!ref)
+			return -1;
+
+		sub_cell = ref->cell_ref;
+
+		/* If cell is not resolved, ignore. No harm there */
+		if (!sub_cell)
+			continue;
+
+		res = gds_tree_check_iterate_ref_and_check(sub_cell, visited_cells);
+		if (res < 0) {
+			/* Error. return. */
+			return -3;
+		} else if (res > 0) {
+			/* Loop in subcell found. Propagate to top */
+			return 1;
+		}
+	}
+
+	/* Remove cell from visted cells */
+	*visited_cells = g_list_remove(*visited_cells, cell_to_check);
+
+	/* No error found in this chain */
+	return 0;
+}
+
+int gds_tree_check_reference_loops(struct gds_library *lib)
+{
+	int res;
+	int loop_count = 0;
+	GList *cell_iter;
+	struct gds_cell *cell_to_check;
+	GList *visited_cells = NULL;
+
+
+	if (!lib)
+		return -1;
+
+	for (cell_iter = lib->cells; cell_iter != NULL; cell_iter = g_list_next(cell_iter)) {
+		cell_to_check = (struct gds_cell *)cell_iter->data;
+
+		/* A broken cell reference will be counted fatal in this case */
+		if (!cell_to_check)
+			return -2;
+
+		/* iterate through references and check if loop exists */
+		res = gds_tree_check_iterate_ref_and_check(cell_to_check, &visited_cells);
+
+		if (visited_cells) {
+			/*
+			 * If  cell contains no loop, print error when list not empty.
+			 * In case of a loop, it is completely normal that the list is not empty,
+			 * due to the instant return from gds_tree_check_iterate_ref_and_check()
+			 */
+			if (res == 0)
+				fprintf(stderr,
+					_("Visited cell list should be empty. This is a bug. Please report this.\n"));
+			g_list_free(visited_cells);
+			visited_cells = NULL;
+		}
+
+		if (res < 0) {
+			/* Error */
+			return res;
+		} else if (res > 0) {
+			/* Loop found: increment loop count and flag cell */
+			cell_to_check->checks.affected_by_reference_loop = 1;
+			loop_count++;
+		} else if (res == 0) {
+			/* No error found for this cell */
+			cell_to_check->checks.affected_by_reference_loop = 0;
+		}
+
+	}
+
+
+	return loop_count;
+}
+
+/** @} */

geometric/bounding-box.c

@@ -0,0 +1,229 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file bounding-box.c
+ * @brief Calculation of bounding boxes
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup geometric
+ * @{
+ */
+
+#include <stdio.h>
+#include <math.h>
+
+#include <gds-render/geometric/bounding-box.h>
+
+#define MIN(a, b) (((a) < (b)) ? (a) : (b)) /**< @brief Return smaller number */
+#define MAX(a, b) (((a) > (b)) ? (a) : (b)) /**< @brief Return bigger number */
+#define ABS_DBL(a) ((a) < 0 ? -(a) : (a))
+
+void bounding_box_calculate_from_polygon(GList *vertices, conv_generic_to_vector_2d_t conv_func, union bounding_box *box)
+{
+	double xmin = DBL_MAX, xmax = -DBL_MAX, ymin = DBL_MAX, ymax = -DBL_MAX;
+	struct vector_2d temp_vec;
+	GList *list_item;
+
+	/* Check for errors */
+	if (!conv_func || !box || !vertices)
+		return;
+
+	for (list_item = vertices; list_item != NULL; list_item = g_list_next(list_item)) {
+		/* Convert generic vertex to vector_2d */
+		if (conv_func)
+			conv_func((void *)list_item->data, &temp_vec);
+		else
+			vector_2d_copy(&temp_vec, (struct vector_2d *)list_item->data);
+
+		/* Update bounding coordinates with vertex */
+		xmin = MIN(xmin, temp_vec.x);
+		xmax = MAX(xmax, temp_vec.x);
+		ymin = MIN(ymin, temp_vec.y);
+		ymax = MAX(ymax, temp_vec.y);
+	}
+
+	/* Fill bounding box with results */
+	box->vectors.lower_left.x = xmin;
+	box->vectors.lower_left.y = ymin;
+	box->vectors.upper_right.x = xmax;
+	box->vectors.upper_right.y = ymax;
+}
+
+void bounding_box_update_with_box(union bounding_box *destination, union bounding_box *update)
+{
+	if (!destination || !update)
+		return;
+
+	destination->vectors.lower_left.x = MIN(destination->vectors.lower_left.x,
+						update->vectors.lower_left.x);
+	destination->vectors.lower_left.y = MIN(destination->vectors.lower_left.y,
+						update->vectors.lower_left.y);
+	destination->vectors.upper_right.x = MAX(destination->vectors.upper_right.x,
+						update->vectors.upper_right.x);
+	destination->vectors.upper_right.y = MAX(destination->vectors.upper_right.y,
+						update->vectors.upper_right.y);
+}
+
+void bounding_box_prepare_empty(union bounding_box *box)
+{
+	box->vectors.lower_left.x = DBL_MAX;
+	box->vectors.lower_left.y = DBL_MAX;
+	box->vectors.upper_right.x = -DBL_MAX;
+	box->vectors.upper_right.y = -DBL_MAX;
+}
+
+/**
+ * @brief Calculate path miter points for a pathwith a \p width and the anchors \p a \p b \p c.
+ * @param[in] a
+ * @param[in] b
+ * @param[in] c
+ * @param[out] m1
+ * @param[out] m2
+ * @param[in] width
+ * @return Miter points in \p m1 and \p m2
+ * @note This function is currently unused (and untested). Ignore any compiler warning regarding this function.
+ */
+static void calculate_path_miter_points(struct vector_2d *a, struct vector_2d *b, struct vector_2d *c,
+					struct vector_2d *m1, struct vector_2d *m2, double width)
+{
+	double angle, angle_sin, u;
+	struct vector_2d ba, bc, u_vec, v_vec, ba_norm;
+
+	if (!a || !b || !c || !m1 || !m2)
+		return;
+
+	vector_2d_subtract(&ba, a, b);
+	vector_2d_subtract(&bc, c, b);
+
+	angle = vector_2d_calculate_angle_between(&ba, &bc);
+
+	if (ABS_DBL(angle) < 0.05 || ABS_DBL(angle - M_PI) < 0.1) {
+		/* Specail cases Don*/
+		vector_2d_copy(&ba_norm, &ba);
+		vector_2d_rotate(&ba_norm, DEG2RAD(90));
+		vector_2d_normalize(&ba_norm);
+		vector_2d_scale(&ba_norm, width/2.0);
+		vector_2d_add(m1, b, &ba_norm);
+		vector_2d_subtract(m2, b, &ba_norm);
+		return;
+	}
+	angle_sin = sin(angle);
+	u = width/(2*angle_sin);
+
+	vector_2d_copy(&u_vec, &ba);
+	vector_2d_copy(&v_vec, &bc);
+	vector_2d_normalize(&u_vec);
+	vector_2d_normalize(&v_vec);
+	vector_2d_scale(&u_vec, u);
+	vector_2d_scale(&v_vec, u);
+
+	vector_2d_copy(m1, b);
+	vector_2d_add(m1, m1, &u_vec);
+	vector_2d_add(m1, m1, &v_vec);
+
+	vector_2d_copy(m2, b);
+	vector_2d_subtract(m2, m2, &u_vec);
+	vector_2d_subtract(m2, m2, &v_vec);
+}
+
+void bounding_box_update_with_path(GList *vertices, double thickness,
+					conv_generic_to_vector_2d_t conv_func, union bounding_box *box)
+{
+	GList *vertex_iterator;
+	struct vector_2d pt;
+
+	if (!vertices || !box)
+		return;
+
+	for (vertex_iterator = vertices; vertex_iterator != NULL; vertex_iterator = g_list_next(vertex_iterator)) {
+
+		if (conv_func != NULL)
+			conv_func(vertex_iterator->data, &pt);
+		else
+			(void)vector_2d_copy(&pt, (struct vector_2d *)vertex_iterator->data);
+
+		/* These are approximations.
+		 * Used as long as miter point calculation is not fully implemented
+		 */
+		box->vectors.lower_left.x = MIN(box->vectors.lower_left.x, pt.x - thickness/2);
+		box->vectors.lower_left.y = MIN(box->vectors.lower_left.y, pt.y - thickness/2);
+		box->vectors.upper_right.x = MAX(box->vectors.upper_right.x, pt.x + thickness/2);
+		box->vectors.upper_right.y = MAX(box->vectors.upper_right.y, pt.y + thickness/2);
+	}
+}
+
+void bounding_box_update_with_point(union bounding_box *destination, conv_generic_to_vector_2d_t conv_func, void *pt)
+{
+	struct vector_2d point;
+
+	if (!destination || !pt)
+		return;
+
+	if (conv_func)
+		conv_func(pt, &point);
+	else
+		(void)vector_2d_copy(&point, (struct vector_2d *)pt);
+
+	destination->vectors.lower_left.x = MIN(destination->vectors.lower_left.x, point.x);
+	destination->vectors.lower_left.y = MIN(destination->vectors.lower_left.y, point.y);
+	destination->vectors.upper_right.x = MAX(destination->vectors.upper_right.x, point.x);
+	destination->vectors.upper_right.y = MAX(destination->vectors.upper_right.y, point.y);
+}
+
+void bounding_box_get_all_points(struct vector_2d *points, union bounding_box *box)
+{
+	if (!points || !box)
+		return;
+
+	points[0].x = box->vectors.lower_left.x;
+	points[0].y = box->vectors.lower_left.y;
+	points[1].x = box->vectors.upper_right.x;
+	points[1].y = box->vectors.lower_left.y;
+	points[2].x = box->vectors.upper_right.x;
+	points[2].y = box->vectors.upper_right.y;
+	points[3].x = box->vectors.lower_left.x;
+	points[3].y = box->vectors.upper_right.y;
+}
+
+void bounding_box_apply_transform(double scale, double rotation_deg, bool flip_at_x, union bounding_box *box)
+{
+	int i;
+	struct vector_2d input_points[4];
+
+	if (!box)
+		return;
+
+	bounding_box_get_all_points(input_points, box);
+
+	/* Reset box */
+	bounding_box_prepare_empty(box);
+
+	for (i = 0; i < 4; i++) {
+		input_points[i].y *= (flip_at_x ? -1 : 1);
+		vector_2d_rotate(&input_points[i], rotation_deg * M_PI / 180.0);
+		vector_2d_scale(&input_points[i], scale);
+
+		bounding_box_update_with_point(box, NULL, &input_points[i]);
+	}
+}
+
+/** @} */

geometric/cell-geometrics.c

@@ -0,0 +1,120 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file cell-geometrics.c
+ * @brief Calculation of gds_cell trigonometrics
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#include <math.h>
+
+#include <gds-render/geometric/cell-geometrics.h>
+
+/**
+ * @addtogroup geometric
+ * @{
+ */
+
+static void convert_gds_point_to_2d_vector(struct gds_point *pt, struct vector_2d *vector)
+{
+	vector->x = pt->x;
+	vector->y = pt->y;
+}
+
+/**
+ * @brief Update the given bounding box with the bounding box of a graphics element.
+ * @param box box to update
+ * @param gfx Graphics element
+ */
+static void update_box_with_gfx(union bounding_box *box, struct gds_graphics *gfx)
+{
+	union bounding_box current_box;
+
+	bounding_box_prepare_empty(&current_box);
+
+	switch (gfx->gfx_type) {
+	case GRAPHIC_BOX:
+		/* Expected fallthrough */
+	case GRAPHIC_POLYGON:
+		bounding_box_calculate_from_polygon(gfx->vertices,
+							(conv_generic_to_vector_2d_t)&convert_gds_point_to_2d_vector,
+							&current_box);
+		break;
+	case GRAPHIC_PATH:
+		/*
+		 * This is not implemented correctly.
+		 * Please be aware if paths are the outmost elements of your cell.
+		 * You might end up with a completely wrong calculated cell size.
+		 */
+		bounding_box_update_with_path(gfx->vertices, gfx->width_absolute,
+							(conv_generic_to_vector_2d_t)&convert_gds_point_to_2d_vector,
+							&current_box);
+		break;
+	default:
+		/* Unknown graphics object. */
+		/* Print error? Nah.. */
+		break;
+	}
+
+	/* Update box with results */
+	bounding_box_update_with_box(box, &current_box);
+}
+
+void calculate_cell_bounding_box(union bounding_box *box, struct gds_cell *cell)
+{
+	GList *gfx_list;
+	struct gds_graphics *gfx;
+	GList *sub_cell_list;
+	struct gds_cell_instance *sub_cell;
+	union bounding_box temp_box;
+
+	if (!box || !cell)
+		return;
+
+	/* Update box with graphic elements */
+	for (gfx_list = cell->graphic_objs; gfx_list != NULL; gfx_list = gfx_list->next) {
+		gfx = (struct gds_graphics *)gfx_list->data;
+		update_box_with_gfx(box, gfx);
+	}
+
+	/* Update bounding box with boxes of subcells */
+	for (sub_cell_list = cell->child_cells; sub_cell_list != NULL;
+						sub_cell_list = sub_cell_list->next) {
+		sub_cell = (struct gds_cell_instance *)sub_cell_list->data;
+		bounding_box_prepare_empty(&temp_box);
+		/* Recursion Woohoo!!  This dies if your GDS is faulty and contains a reference loop */
+		calculate_cell_bounding_box(&temp_box, sub_cell->cell_ref);
+
+		/* Apply transformations */
+		bounding_box_apply_transform(ABS(sub_cell->magnification), sub_cell->angle,
+					     sub_cell->flipped, &temp_box);
+
+		/* Move bounding box to origin */
+		temp_box.vectors.lower_left.x += sub_cell->origin.x;
+		temp_box.vectors.upper_right.x += sub_cell->origin.x;
+		temp_box.vectors.lower_left.y += sub_cell->origin.y;
+		temp_box.vectors.upper_right.y += sub_cell->origin.y;
+
+		/* update the parent's box */
+		bounding_box_update_with_box(box, &temp_box);
+	}
+}
+
+/** @} */

geometric/vector-operations.c

@@ -0,0 +1,150 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file vector-operations.c
+ * @brief 2D Vector operations
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup geometric
+ * @{
+ */
+
+#include <math.h>
+#include <stdlib.h>
+
+#include <gds-render/geometric/vector-operations.h>
+
+#define ABS_DBL(a) ((a) < 0.0 ? -(a) : (a))
+
+double vector_2d_scalar_multipy(struct vector_2d *a, struct vector_2d *b)
+{
+	if (a && b)
+		return (a->x * b->x) + (a->y * b->y);
+	else
+		return 0.0;
+}
+
+void vector_2d_normalize(struct vector_2d *vec)
+{
+	double len;
+
+	if (!vec)
+		return;
+	len = sqrt(pow(vec->x, 2) + pow(vec->y, 2));
+	vec->x = vec->x/len;
+	vec->y = vec->y/len;
+}
+
+void vector_2d_rotate(struct vector_2d *vec, double angle)
+{
+	double sin_val, cos_val;
+	struct vector_2d temp;
+
+	if (!vec)
+		return;
+
+	sin_val = sin(angle);
+	cos_val = cos(angle);
+
+	(void)vector_2d_copy(&temp, vec);
+
+	/* Apply rotation matrix */
+	vec->x = (cos_val * temp.x) - (sin_val * temp.y);
+	vec->y = (sin_val * temp.x) + (cos_val * temp.y);
+}
+
+struct vector_2d *vector_2d_copy(struct vector_2d *opt_res, struct vector_2d *vec)
+{
+	struct vector_2d *res;
+
+	if (!vec)
+		return NULL;
+
+	if (opt_res)
+		res = opt_res;
+	else
+		res = vector_2d_alloc();
+
+	if (res) {
+		res->x = vec->x;
+		res->y = vec->y;
+	}
+		return res;
+}
+
+struct vector_2d *vector_2d_alloc(void)
+{
+	return (struct vector_2d *)malloc(sizeof(struct vector_2d));
+}
+
+void vector_2d_free(struct vector_2d *vec)
+{
+	if (vec)
+		free(vec);
+}
+
+void vector_2d_scale(struct vector_2d *vec, double scale)
+{
+	if (!vec)
+		return;
+
+	vec->x *= scale;
+	vec->y *= scale;
+}
+
+double vector_2d_abs(struct vector_2d *vec)
+{
+	double len = 0.0;
+
+	if (vec)
+		len = sqrt(pow(vec->x, 2) + pow(vec->y, 2));
+	return len;
+}
+
+double vector_2d_calculate_angle_between(struct vector_2d *a, struct vector_2d *b)
+{
+	double cos_angle;
+
+	if (!a || !b)
+		return 0.0;
+
+	cos_angle = ABS_DBL(vector_2d_scalar_multipy(a, b)) / (vector_2d_abs(a) * vector_2d_abs(b));
+	return acos(cos_angle);
+}
+
+void vector_2d_subtract(struct vector_2d *res, struct vector_2d *a, struct vector_2d *b)
+{
+	if (res && a && b) {
+		res->x = a->x - b->x;
+		res->y = a->y - b->y;
+	}
+}
+
+void vector_2d_add(struct vector_2d *res, struct vector_2d *a, struct vector_2d *b)
+{
+	if (res && a && b) {
+		res->x = a->x + b->x;
+		res->y = a->y + b->y;
+	}
+}
+
+/** @} */

glade/CMakeLists.txt

@@ -1,8 +0,0 @@
-add_custom_target(glib-resources DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/resources.c)
-add_custom_command(DEPENDS
-                         ${CMAKE_CURRENT_SOURCE_DIR}/*.glade
-		   OUTPUT
-			${CMAKE_CURRENT_BINARY_DIR}/resources.c
-		   COMMAND 
-			glib-compile-resources --target="${CMAKE_CURRENT_BINARY_DIR}/resources.c" --sourcedir="${CMAKE_CURRENT_SOURCE_DIR}" --generate-source "${CMAKE_CURRENT_SOURCE_DIR}/resources.xml"
-		   )

glade/dialog.glade

@@ -1,90 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!-- Generated with glade 3.22.1 -->
-<interface>
-  <requires lib="gtk+" version="3.20"/>
-  <object class="GtkAdjustment" id="adjustment1">
-    <property name="lower">1</property>
-    <property name="upper">3000</property>
-    <property name="value">1000</property>
-    <property name="step_increment">10</property>
-    <property name="page_increment">1000</property>
-  </object>
-  <object class="GtkBox" id="dialog-box">
-    <property name="visible">True</property>
-    <property name="can_focus">False</property>
-    <property name="orientation">vertical</property>
-    <child>
-      <object class="GtkRadioButton" id="latex-radio">
-        <property name="label" translatable="yes">Generate LaTeX/TikZ output</property>
-        <property name="visible">True</property>
-        <property name="can_focus">True</property>
-        <property name="receives_default">False</property>
-        <property name="active">True</property>
-        <property name="draw_indicator">True</property>
-      </object>
-      <packing>
-        <property name="expand">False</property>
-        <property name="fill">True</property>
-        <property name="position">0</property>
-      </packing>
-    </child>
-    <child>
-      <object class="GtkRadioButton" id="cairo-radio">
-        <property name="label" translatable="yes">Render PDF using Cairographics</property>
-        <property name="visible">True</property>
-        <property name="can_focus">True</property>
-        <property name="receives_default">False</property>
-        <property name="active">True</property>
-        <property name="draw_indicator">True</property>
-        <property name="group">latex-radio</property>
-      </object>
-      <packing>
-        <property name="expand">False</property>
-        <property name="fill">True</property>
-        <property name="position">1</property>
-      </packing>
-    </child>
-    <child>
-      <object class="GtkScale" id="dialog-scale">
-        <property name="visible">True</property>
-        <property name="can_focus">True</property>
-        <property name="adjustment">adjustment1</property>
-        <property name="round_digits">0</property>
-        <property name="digits">0</property>
-      </object>
-      <packing>
-        <property name="expand">False</property>
-        <property name="fill">True</property>
-        <property name="position">2</property>
-      </packing>
-    </child>
-    <child>
-      <object class="GtkCheckButton" id="standalone-check">
-        <property name="label" translatable="yes">Configure LaTeX as standalone document</property>
-        <property name="visible">True</property>
-        <property name="can_focus">True</property>
-        <property name="receives_default">False</property>
-        <property name="draw_indicator">True</property>
-      </object>
-      <packing>
-        <property name="expand">False</property>
-        <property name="fill">True</property>
-        <property name="position">3</property>
-      </packing>
-    </child>
-    <child>
-      <object class="GtkCheckButton" id="layer-check">
-        <property name="label" translatable="yes">Generate PDF Layers</property>
-        <property name="visible">True</property>
-        <property name="can_focus">True</property>
-        <property name="receives_default">False</property>
-        <property name="draw_indicator">True</property>
-      </object>
-      <packing>
-        <property name="expand">False</property>
-        <property name="fill">True</property>
-        <property name="position">4</property>
-      </packing>
-    </child>
-  </object>
-</interface>

glade/main.glade

@@ -1,134 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!-- Generated with glade 3.22.1 -->
-<interface>
-  <requires lib="gtk+" version="3.20"/>
-  <object class="GtkWindow" id="main-window">
-    <property name="height_request">250</property>
-    <property name="can_focus">False</property>
-    <child type="titlebar">
-      <object class="GtkHeaderBar">
-        <property name="name">header</property>
-        <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <property name="title" translatable="yes">GDS Renderer</property>
-        <property name="subtitle" translatable="yes">GDSII to PDF Converter</property>
-        <property name="show_close_button">True</property>
-        <child>
-          <object class="GtkButton" id="button-load-gds">
-            <property name="label">gtk-open</property>
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="receives_default">True</property>
-            <property name="use_stock">True</property>
-            <property name="always_show_image">True</property>
-            <style>
-              <class name="suggested-action"/>
-            </style>
-          </object>
-        </child>
-        <child>
-          <object class="GtkButton" id="button-load-mapping">
-            <property name="label" translatable="yes">Load Mapping</property>
-            <property name="visible">True</property>
-            <property name="sensitive">False</property>
-            <property name="can_focus">True</property>
-            <property name="receives_default">True</property>
-            <style>
-              <class name="suggested-action"/>
-            </style>
-          </object>
-          <packing>
-            <property name="position">1</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkButton" id="button-save-mapping">
-            <property name="label" translatable="yes">Save Mapping</property>
-            <property name="visible">True</property>
-            <property name="sensitive">False</property>
-            <property name="can_focus">True</property>
-            <property name="receives_default">True</property>
-            <style>
-              <class name="suggested-action"/>
-            </style>
-          </object>
-          <packing>
-            <property name="position">2</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkButton" id="convert-button">
-            <property name="label">gtk-convert</property>
-            <property name="name">button-convert</property>
-            <property name="visible">True</property>
-            <property name="sensitive">False</property>
-            <property name="can_focus">True</property>
-            <property name="receives_default">True</property>
-            <property name="use_stock">True</property>
-            <property name="always_show_image">True</property>
-            <style>
-              <class name="suggested-action"/>
-            </style>
-          </object>
-          <packing>
-            <property name="position">3</property>
-          </packing>
-        </child>
-      </object>
-    </child>
-    <child>
-      <object class="GtkBox">
-        <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <child>
-          <object class="GtkScrolledWindow">
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="hscrollbar_policy">never</property>
-            <property name="shadow_type">in</property>
-            <child>
-              <object class="GtkTreeView" id="cell-tree">
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <child internal-child="selection">
-                  <object class="GtkTreeSelection"/>
-                </child>
-              </object>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">True</property>
-            <property name="fill">True</property>
-            <property name="position">0</property>
-          </packing>
-        </child>
-        <child>
-          <object class="GtkScrolledWindow">
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="hscrollbar_policy">never</property>
-            <property name="shadow_type">in</property>
-            <child>
-              <object class="GtkViewport">
-                <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <child>
-                  <object class="GtkListBox" id="layer-list">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="selection_mode">none</property>
-                  </object>
-                </child>
-              </object>
-            </child>
-          </object>
-          <packing>
-            <property name="expand">True</property>
-            <property name="fill">True</property>
-            <property name="position">1</property>
-          </packing>
-        </child>
-      </object>
-    </child>
-  </object>
-</interface>

glade/resources.xml

@@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<gresources>
-  <gresource prefix="/">
-    <file compressed="true">main.glade</file>
-    <file compressed="true">about.glade</file>
-    <file>layer-widget.glade</file>
-    <file>dialog.glade</file>
-  </gresource>
-</gresources>
-
-

icon/gds-render.svg

@@ -0,0 +1,479 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:osb="http://www.openswatchbook.org/uri/2009/osb"
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
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+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="30mm"
+   height="30mm"
+   viewBox="0 0 30.000001 29.999999"
+   version="1.1"
+   id="svg8"
+   inkscape:version="0.92.2 2405546, 2018-03-11"
+   sodipodi:docname="gds-render.svg"
+   inkscape:export-filename="/home/mari/projects/cpp/gds-render/icon/22x22/gds-render.png"
+   inkscape:export-xdpi="18.62639"
+   inkscape:export-ydpi="18.62639">
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+  </g>
+</svg>

include/gds-render/cell-selector/lib-cell-renderer.h

@@ -14,7 +14,18 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file lib-cell-renderer.h
+ * @brief Header file for the LibCellRenderer GObject Class
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup LibCellRenderer
+ * @{
  */
 
 #ifndef __LIB_CELL_RENDERER_H__
@@ -27,15 +38,33 @@ G_BEGIN_DECLS
 G_DECLARE_FINAL_TYPE(LibCellRenderer, lib_cell_renderer, LIB_CELL, RENDERER, GtkCellRendererText)
 #define TYPE_LIB_CELL_RENDERER (lib_cell_renderer_get_type())
 
+/** @{
+ * Error levels
+ */
+#define LIB_CELL_RENDERER_ERROR_WARN (1U<<0)
+#define LIB_CELL_RENDERER_ERROR_ERR (1U<<1)
+/** @} */
+
 typedef struct _LibCellRenderer {
         /* Inheritance */
         GtkCellRendererText super;
         /* Custom Elements */
 } LibCellRenderer;
 
+/**
+ * @brief lib_cell_renderer_get_type
+ * @return GObject Type
+ */
 GType lib_cell_renderer_get_type(void);
+
+/**
+ * @brief Create a new renderer for renderering @ref gds_cell and @ref gds_library elements.
+ * @return New renderer object
+ */
 GtkCellRenderer *lib_cell_renderer_new(void);
 
 G_END_DECLS
 
 #endif /* __LIB_CELL_RENDERER_H__ */
+
+/** @} */

include/gds-render/command-line.h

@@ -0,0 +1,76 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file command-line.h
+ * @brief Render according to command line parameters
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup cmdline
+ * @{
+ */
+
+#ifndef _COMMAND_LINE_H_
+#define _COMMAND_LINE_H_
+
+#include <glib.h>
+
+/**
+ * @brief External renderer paramameters to command line renderer
+ */
+struct external_renderer_params {
+	/**
+	 * @brief Path to shared object
+	 */
+	char *so_path;
+
+	/**
+	 * @brief Command line parameters given
+	 */
+	char *cli_params;
+};
+
+/**
+ * @brief Convert GDS according to command line parameters
+ * @param gds_name Path to GDS File
+ * @param cell_name Cell name
+ * @param renderers Renderer ids
+ * @param output_file_names Output file names
+ * @param layer_file Layer mapping file
+ * @param ext_param Settings for external library renderer
+ * @param tex_standalone Standalone TeX
+ * @param tex_layers TeX OCR layers
+ * @param scale Scale value
+ * @return Error code, 0 if successful
+ */
+int command_line_convert_gds(const char *gds_name,
+			     const char *cell_name,
+			     char **renderers,
+			     char **output_file_names,
+			     const char *layer_file,
+			     struct external_renderer_params *ext_param,
+			     gboolean tex_standalone,
+			     gboolean tex_layers,
+			     double scale);
+
+#endif /* _COMMAND_LINE_H_ */
+
+/** @} */

include/gds-render/gds-render-gui.h

@@ -0,0 +1,61 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file gds-render-gui.h
+ * @brief Header for GdsRenderGui Object
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#ifndef _GDS_RENDER_GUI_
+#define _GDS_RENDER_GUI_
+
+/**
+ * @addtogroup GUI
+ * @{
+ */
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+G_DECLARE_FINAL_TYPE(GdsRenderGui, gds_render_gui, RENDERER, GUI, GObject);
+
+#define RENDERER_TYPE_GUI (gds_render_gui_get_type())
+
+/**
+ * @brief Create new GdsRenderGui Object
+ * @return New object
+ */
+GdsRenderGui *gds_render_gui_new();
+
+/**
+ * @brief Get main window
+ *
+ * This function returns the main window of the GUI, which can later be displayed.
+ * All handling of hte GUI is taken care of inside the GdsRenderGui Object
+ * @return The generated main window
+ */
+GtkWindow *gds_render_gui_get_main_window(GdsRenderGui *gui);
+
+G_END_DECLS
+
+/** @} */
+
+#endif /* _GDS_RENDER_GUI_ */

include/gds-render/gds-utils/gds-parser.h

@@ -0,0 +1,64 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file gds-parser.h
+ * @brief Header file for the GDS-Parser
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#ifndef _GDSPARSER_H_
+#define _GDSPARSER_H_
+
+/**
+ * @addtogroup GDS-Utilities
+ * @{
+ */
+
+#include <glib.h>
+
+#include <gds-render/gds-utils/gds-types.h>
+
+#define GDS_PRINT_DEBUG_INFOS (0) /**< @brief 1: Print infos, 0: Don't print */
+
+/**
+ * @brief Parse a GDS file
+ *
+ * This function parses a GDS File and creates a list of libraries,
+ * which then contain the different cells.
+ *
+ * The function appends The detected libraries to the \p library_array list.
+ * The library array may be empty, meaning *library_list may be NULL.
+ *
+ * @param[in] filename Path to the GDS file
+ * @param[in,out] library_array GList Pointer.
+ * @return 0 if successful
+ */
+int parse_gds_from_file(const char *filename, GList **library_array);
+
+/**
+ * @brief Deletes all libraries including cells, references etc.
+ * @param library_list Pointer to a list of #gds_library. Is set to NULL after completion.
+ * @return 0
+ */
+int clear_lib_list(GList **library_list);
+
+/** @} */
+
+#endif /* _GDSPARSER_H_ */

include/gds-render/gds-utils/gds-tree-checker.h

@@ -0,0 +1,61 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file gds-tree-checker.h
+ * @brief Checking functions of a cell tree (Header)
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup GDS-Utilities
+ * @{
+ */
+
+#ifndef _GDS_TREE_CHECKER_H_
+#define _GDS_TREE_CHECKER_H_
+
+#include <gds-render/gds-utils/gds-types.h>
+
+/**
+ * @brief gds_tree_check_cell_references checks if all child cell references can be resolved in the given library
+ *
+ * This function will only mark cells that
+ * directly contain unresolved references.
+ *
+ * If a cell contains a reference to a cell with unresolved references, it is not flagged.
+ *
+ * @param lib The GDS library to check
+ * @return less than 0 if an error occured during processing; 0 if all child cells could be resolved;
+ *         greater than zero if the processing was successful but not all cell references could be resolved.
+ *         In this case the number of unresolved references is returned
+ */
+int gds_tree_check_cell_references(struct gds_library *lib);
+
+/**
+ * @brief gds_tree_check_reference_loops checks if the given library contains reference loops
+ * @param lib GDS library
+ * @return negative if an error occured, zero if there are no reference loops, else a positive number representing the number
+ *         of affected cells
+ */
+int gds_tree_check_reference_loops(struct gds_library *lib);
+
+#endif /* _GDS_TREE_CHECKER_H_ */
+
+/** @} */

include/gds-render/gds-utils/gds-types.h

@@ -0,0 +1,146 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file gds-types.h
+ * @brief Defines types and macros used by the GDS-Parser
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+  * @addtogroup GDS-Utilities
+  * @{
+  */
+
+#ifndef __GDS_TYPES_H__
+#define __GDS_TYPES_H__
+
+#include <stdint.h>
+#include <glib.h>
+
+#define CELL_NAME_MAX (100) /**< @brief Maximum length of a gds_cell::name or a gds_library::name */
+
+/* Maybe use the macros that ship with the compiler? */
+#define MIN(a,b) (((a) < (b)) ? (a) : (b)) /**< @brief Return smaller number */
+#define MAX(a,b) (((a) > (b)) ? (a) : (b)) /**< @brief Return bigger number */
+
+/** @brief Defintion of check counter default value
+ *  that indicates that the corresponding check has not yet been executed */
+enum {GDS_CELL_CHECK_NOT_RUN = -1};
+
+/** @brief Types of graphic objects */
+enum graphics_type
+{
+		    GRAPHIC_PATH = 0, /**< @brief Path. Esentially a line */
+		    GRAPHIC_POLYGON = 1, /**< @brief An arbitrary polygon */
+		    GRAPHIC_BOX = 2 /**< @brief A rectangle. @warning Implementation in renderers might be buggy!*/
+};
+
+/**
+ * @brief Defines the line caps of a path
+ */
+enum path_type {PATH_FLUSH = 0, PATH_ROUNDED = 1, PATH_SQUARED = 2}; /**< Path line caps */
+
+/**
+ * @brief A point in the 2D plane. Sometimes referred to as vertex
+ */
+struct gds_point {
+	int x;
+	int y;
+};
+
+/**
+ * @brief Stores the result of the cell checks.
+ */
+struct gds_cell_checks {
+	int unresolved_child_count; /**< @brief Number of unresolved cell instances inside this cell. Default: @ref GDS_CELL_CHECK_NOT_RUN */
+	int affected_by_reference_loop; /**< @brief 1 if the cell is affected by a reference loop and therefore not renderable. Default: @ref GDS_CELL_CHECK_NOT_RUN*/
+	/**
+	 * @brief For the internal use of the checker.
+	 * @warning Do not use this structure and its contents!
+	 */
+	struct _check_internals {
+		int marker;
+	} _internal;
+};
+
+/**
+ * @brief Date information for cells and libraries
+ */
+struct gds_time_field {
+	uint16_t year;
+	uint16_t month;
+	uint16_t day;
+	uint16_t hour;
+	uint16_t minute;
+	uint16_t second;
+};
+
+/**
+ * @brief A GDS graphics object
+ */
+struct gds_graphics {
+	enum graphics_type gfx_type; /**< \brief Type of graphic */
+	GList *vertices; /**< @brief List of #gds_point */
+	enum path_type path_render_type; /**< @brief Line cap */
+	int width_absolute; /**< @brief Width. Not used for objects other than paths */
+	int16_t layer; /**< @brief Layer the graphic object is on */
+	int16_t datatype; /**< @brief Data type of graphic object */
+};
+
+/**
+ * @brief This represents an instanc of a cell inside another cell
+ */
+struct gds_cell_instance {
+	char ref_name[CELL_NAME_MAX]; /**< @brief Name of referenced cell */
+	struct gds_cell *cell_ref; /**< @brief Referenced gds_cell structure */
+	struct gds_point origin; /**< @brief Origin */
+	int flipped; /**< @brief Mirrored on x-axis before rotation */
+	double angle; /**< @brief Angle of rotation (counter clockwise) in degrees */
+	double magnification; /**< @brief magnification */
+};
+
+/**
+ * @brief A Cell inside a gds_library
+ */
+struct gds_cell {
+	char name[CELL_NAME_MAX];
+	struct gds_time_field mod_time;
+	struct gds_time_field access_time;
+	GList *child_cells; /**< @brief List of #gds_cell_instance elements */
+	GList *graphic_objs; /**< @brief List of #gds_graphics */
+	struct gds_library *parent_library; /**< @brief Pointer to parent library */
+	struct gds_cell_checks checks; /**< @brief Checking results */
+};
+
+/**
+ * @brief GDS Toplevel library
+ */
+struct gds_library {
+	char name[CELL_NAME_MAX];
+	struct gds_time_field mod_time;
+	struct gds_time_field access_time;
+	double unit_in_meters;  /**< Length of a database unit in meters */
+	GList *cells; /**< List of #gds_cell that contains all cells in this library*/
+	GList *cell_names /**< List of strings that contains all cell names */;
+};
+
+/** @} */
+
+#endif /* __GDS_TYPES_H__ */

include/gds-render/geometric/bounding-box.h

@@ -0,0 +1,153 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file bounding-box.h
+ * @brief Header for calculation of bounding boxes
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup geometric
+ * @{
+ */
+
+#ifndef _BOUNDING_BOX_H_
+#define _BOUNDING_BOX_H_
+
+#include <glib.h>
+#include <gds-render/geometric/vector-operations.h>
+#include <stdbool.h>
+
+/**
+ * @brief Union describing a bounding box
+ *
+ * Two ways of accessing a bounding box are possible.
+ *
+ * Either, use the "named" vectors struct to specifically access the points
+ * @code
+ * 	lower_left = box.vectors.lower_left;
+ * 	upper right = box.vectors.upper_right;
+ * @endcode
+ *
+ * or use the iterable vector array:
+ * @code
+ * 	for (i = 0; i < 2; i++)
+ * 		box.vector_array[i] = points[i];
+ * @endcode
+ */
+union bounding_box {
+	/**
+	 * @brief Location vectors of upper right and lower left bounding box points
+	 * @note Coordinate System is (y up | x right)
+	 */
+	struct _vectors {
+		/** @brief Lower left point of the bounding box */
+		struct vector_2d lower_left;
+		/** @brief Upper right point of the bounding box */
+		struct vector_2d upper_right;
+	} vectors;
+	/**
+	 * @brief Array of vectors representing a bounding box
+	 * @note This is more convenient for iterating
+	 */
+	struct vector_2d vector_array[2];
+};
+
+/*
+ * @brief Pointer to a function that takes any pointer and converts this object to a vector_2d struct
+ */
+typedef void (*conv_generic_to_vector_2d_t)(void *, struct vector_2d *);
+
+/**
+ * @brief Calculate bounding box of polygon
+ * @param vertices List of vertices that describe the polygon
+ * @param conv_func Conversion function to convert vertices to vector_2d structs.
+ * @param box Box to write to. This box is not updated! All previous data is discarded
+ */
+void bounding_box_calculate_from_polygon(GList *vertices, conv_generic_to_vector_2d_t conv_func, union bounding_box *box);
+
+/**
+ * @brief Update an exisitng bounding box with another one.
+ * @param destination Target box to update
+ * @param update Box to update the target with
+ */
+void bounding_box_update_with_box(union bounding_box *destination, union bounding_box *update);
+
+/**
+ * @brief Prepare an empty bounding box.
+ *
+ * Updating this specially prepared box, results in a bounding box that is the same size as the update
+ *
+ * @param box Box to preapre
+ */
+void bounding_box_prepare_empty(union bounding_box *box);
+
+/**
+ * @brief Update bounding box with a point
+ * @param destination Bounding box to update
+ * @param conv_func Conversion function to convert \p pt to a vector_2d. May be NULL
+ * @param pt Point to update bounding box with
+ */
+void bounding_box_update_with_point(union bounding_box *destination, conv_generic_to_vector_2d_t conv_func, void *pt);
+
+/**
+ * @brief Return all four corner points of a bounding box
+ * @param[out] points Array of 4 vector_2d structs that has to be allocated by the caller
+ * @param box Bounding box
+ */
+void bounding_box_get_all_points(struct vector_2d *points, union bounding_box *box);
+
+/**
+ * @brief Apply transformations onto bounding box.
+ *
+ * All corner points \f$ \vec{P_i} \f$ of the bounding box are transformed to output points \f$ \vec{P_o} \f$ by:
+ *
+ * \f$ \vec{P_o} = s \cdot \begin{pmatrix}\cos\left(\phi\right) & -\sin\left(\phi\right)\\ \sin\left(\phi\right) & \cos\left(\phi\right)\end{pmatrix} \cdot \begin{pmatrix} 1 & 0 \\ 0 & -1^{m} \end{pmatrix} \cdot \vec{P_i} \f$, with:
+ *
+ * * \f$s\f$: Scale
+ * * \f$m\f$: 1, if flipped_at_x is True, else 0
+ * * \f$\phi\f$: Rotation angle in radians. The conversion degrees => radians is done internally
+ *
+ * The result is the bounding box generated around all output points
+ *
+ * @param scale Scaling factor
+ * @param rotation_deg Rotation of bounding box around the origin in degrees (counterclockwise)
+ * @param flip_at_x Flip the boundig box on the x axis before rotating.
+ * @param box Bounding box the operations should be applied to.
+ * @note Keep in mind, that this bounding box is actually the bounding box of the rotated boundig box and not the object itself.
+ *       It might be too big.
+ */
+void bounding_box_apply_transform(double scale, double rotation_deg, bool flip_at_x, union bounding_box *box);
+
+/**
+ * @brief Calculate the bounding box of a path and update the given bounding box
+ * @param vertices Vertices the path is made up of
+ * @param thickness Thisckness of the path
+ * @param conv_func Conversion function for vertices to vector_2d structs
+ * @param box Bounding box to write results in.
+ * @warning This function is not yet implemented correctly. Miter points of paths are not taken into account.
+ *		If a path is the outmost object of your cell _and_ it is not parallel to one of the coordinate axes,
+ *		the calculated bounding box size might be off. In other cases it should be reasonable close to the real bounding box.
+ */
+void bounding_box_update_with_path(GList *vertices, double thickness, conv_generic_to_vector_2d_t conv_func, union bounding_box *box);
+
+#endif /* _BOUNDING_BOX_H_ */
+
+/** @} */

include/gds-render/geometric/cell-geometrics.h

@@ -0,0 +1,54 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file cell-geometrics.h
+ * @brief Calculation of gds_cell geometrics
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup geometric
+ * @{
+ */
+
+#ifndef _CELL_GEOMETRICS_H_
+#define _CELL_GEOMETRICS_H_
+
+#include <gds-render/geometric/bounding-box.h>
+#include <gds-render/gds-utils/gds-types.h>
+
+/**
+ * @brief Calculate bounding box of a gds cell.
+ *
+ * This function updates a given bounding box with the dimensions of a
+ * gds_cell. Please note that the handling of path miter points is not complete yet.
+ * If a path object is the outmost object of your cell at any edge,
+ * the resulting bounding box might be the wrong size. The devistion from the real size
+ * is guaranteed to be within the width of the path object.
+ *
+ * @param box Resulting boundig box. Will be updated and not overwritten
+ * @param cell Toplevel cell
+ * @warning Handling of Path graphic objects not yet implemented correctly.
+ */
+void calculate_cell_bounding_box(union bounding_box *box, struct gds_cell *cell);
+
+#endif /* _CELL_GEOMETRICS_H_ */
+
+/** @} */

include/gds-render/geometric/vector-operations.h

@@ -0,0 +1,58 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file vector-operations.h
+ * @brief Header for 2D Vector operations
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup geometric
+ * @{
+ */
+
+
+#ifndef _VECTOR_OPERATIONS_H_
+#define _VECTOR_OPERATIONS_H_
+
+#include <math.h>
+
+struct vector_2d {
+    double x;
+    double y;
+};
+
+#define DEG2RAD(a) ((a)*M_PI/180.0)
+
+double vector_2d_scalar_multipy(struct vector_2d *a, struct vector_2d *b);
+void vector_2d_normalize(struct vector_2d *vec);
+void vector_2d_rotate(struct vector_2d *vec, double angle);
+struct vector_2d *vector_2d_copy(struct vector_2d *opt_res, struct vector_2d *vec);
+struct vector_2d *vector_2d_alloc(void);
+void vector_2d_free(struct vector_2d *vec);
+void vector_2d_scale(struct vector_2d *vec, double scale);
+double vector_2d_abs(struct vector_2d *vec);
+double vector_2d_calculate_angle_between(struct vector_2d *a, struct vector_2d *b);
+void vector_2d_subtract(struct vector_2d *res, struct vector_2d *a, struct vector_2d *b);
+void vector_2d_add(struct vector_2d *res, struct vector_2d *a, struct vector_2d *b);
+
+#endif /* _VECTOR_OPERATIONS_H_ */
+
+/** @} */

include/gds-render/layer/color-palette.h

@@ -0,0 +1,70 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file color-palette.h
+ * @brief Class representing a color palette
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#ifndef _COLOR_PALETTE_H_
+#define _COLOR_PALETTE_H_
+
+#include <glib.h>
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+G_DECLARE_FINAL_TYPE(ColorPalette, color_palette, GDS_RENDER, COLOR_PALETTE, GObject);
+
+#define TYPE_GDS_RENDER_COLOR_PALETTE (color_palette_get_type())
+
+/**
+ * @brief Create a new object with from a resource containing the html hex color scheme
+ * @param resource_name Name of the resource
+ * @return New object
+ */
+ColorPalette *color_palette_new_from_resource(char *resource_name);
+
+/**
+ * @brief Get the n-th color in the palette identified by the index.
+ *
+ * This function fills the nth color into the supplied \p color.
+ * \p color is returned.
+ *
+ * If \p color is NULL, a new GdkRGBA is created and returned.
+ * This element must be freed afterwards.
+ *
+ * @param palette Color palette
+ * @param color GdkRGBA struct to fill data in. May be NULL.
+ * @param index Index of color. Starts at 0
+ * @return GdkRGBA color. If \p color is NULL, the returned color must be freed afterwards
+ */
+GdkRGBA *color_palette_get_color(ColorPalette *palette, GdkRGBA *color, unsigned int index);
+
+/**
+ * @brief Return amount of stored colors in \p palette
+ * @param palette Color palette
+ * @return Count of colors
+ */
+unsigned int color_palette_get_color_count(ColorPalette *palette);
+
+G_END_DECLS
+
+#endif /* _COLOR_PALETTE_H_ */

include/gds-render/layer/layer-selector.h

@@ -0,0 +1,137 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file layer-selector.h
+ * @brief Implementation of the Layer selection list
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup layer-selector
+ * @{
+ */
+
+#ifndef __LAYER_SELECTOR_H__
+#define __LAYER_SELECTOR_H__
+
+#include <gtk/gtk.h>
+#include <glib.h>
+#include <gds-render/layer/color-palette.h>
+#include <gds-render/layer/layer-settings.h>
+
+G_BEGIN_DECLS
+
+G_DECLARE_FINAL_TYPE(LayerSelector, layer_selector, LAYER, SELECTOR, GObject);
+
+#define TYPE_LAYER_SELECTOR (layer_selector_get_type())
+
+/**
+ * @brief Defines how to sort the layer selector list box.
+ */
+enum layer_selector_sort_algo {LAYER_SELECTOR_SORT_DOWN = 0, LAYER_SELECTOR_SORT_UP};
+
+/**
+ * @brief layer_selector_new
+ * @param list_box The associated list box, the content is displayed in
+ * @return Newly created layer selector
+ */
+LayerSelector *layer_selector_new(GtkListBox *list_box);
+
+/**
+ * @brief Generate layer widgets in in the LayerSelector instance
+ * @note This clears all previously inserted elements
+ * @param selector LayerSelector instance
+ * @param libs The libraries to add
+ */
+void layer_selector_generate_layer_widgets(LayerSelector *selector, GList *libs);
+
+/**
+ * @brief Supply button for loading the layer mapping
+ * @param selector LayerSelector instance
+ * @param button Load button. Will be referenced
+ * @param main_window Parent window for dialogs. Will be referenced
+ */
+void layer_selector_set_load_mapping_button(LayerSelector *selector, GtkWidget *button, GtkWindow *main_window);
+
+/**
+ * @brief Supply button for saving the layer mapping
+ * @param selector LayerSelector instance
+ * @param button Save button. Will be refeneced
+ * @param main_window Parent window for dialogs. Will be referenced
+ */
+void layer_selector_set_save_mapping_button(LayerSelector *selector, GtkWidget *button, GtkWindow *main_window);
+
+/**
+ * @brief Get a list of all layers that shall be exported when rendering the cells
+ * @param selector Layer selector instance
+ * @return LayerSettings containing the layer information
+ */
+LayerSettings *layer_selector_export_rendered_layer_info(LayerSelector *selector);
+
+/**
+ * @brief Force the layer selector list to be sorted according to \p sort_function
+ * @param selector LayerSelector instance
+ * @param sort_function The sorting method (up or down sorting)
+ */
+void layer_selector_force_sort(LayerSelector *selector, enum layer_selector_sort_algo sort_function);
+
+/**
+ * @brief Set 'export' value of all layers in the LayerSelector to the supplied select value
+ * @param layer_selector LayerSelector object
+ * @param select
+ */
+void layer_selector_select_all_layers(LayerSelector *layer_selector, gboolean select);
+
+/**
+ * @brief Apply colors from palette to all layers. Aditionally set alpha
+ * @param layer_selector LayerSelector object
+ * @param palette Color palette to use
+ * @param global_alpha Additional alpha value that is applied to all layers. Must be > 0
+ */
+void layer_selector_auto_color_layers(LayerSelector *layer_selector, ColorPalette *palette, double global_alpha);
+
+/**
+ * @brief Auto name all layers in the layer selector.
+ *
+ * This functions sets the name of the layer equal to its number.
+ * The \p overwrite parameter specifies if already set layer names are overwritten.
+ *
+ * @param layer_selector LayerSelector
+ * @param overwrite Overwrite existing layer names
+ */
+void layer_selector_auto_name_layers(LayerSelector *layer_selector, gboolean overwrite);
+
+/**
+ * @brief Check if the given layer selector contains layer elements.
+ *
+ * This function checks whether there are elements present.
+ * If an invalid object pointer \p layer_selector is passed,
+ * the function returns FALSE
+ *
+ * @param[in] layer_selector Selector to check
+ * @return True, if there is at least one layer present inside the selector
+ */
+gboolean layer_selector_contains_elements(LayerSelector *layer_selector);
+
+G_END_DECLS
+
+#endif /* __LAYER_SELECTOR_H__ */
+
+/** @} */

include/gds-render/layer/layer-settings.h

@@ -0,0 +1,123 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file layer-settings.h
+ * @brief LayerSettings class header file
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#ifndef _LAYER_INFO_H_
+#define _LAYER_INFO_H_
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+/**
+ * @brief Layer information.
+ *
+ * This structs contains information on how to render a layer
+ * @note You probably don't want to use this struct standalone but in combination
+ * with a LayerSettings object.
+ */
+struct layer_info
+{
+	int layer; /**< @brief Layer number */
+	char *name; /**< @brief Layer name. */
+	int stacked_position; /**< @brief Position of layer in output @warning This parameter is not used by any renderer so far @note Lower is bottom, higher is top */
+	GdkRGBA color; /**< @brief RGBA color used to render this layer */
+	int render; /**< @brief true: Render to output */
+};
+
+G_DECLARE_FINAL_TYPE(LayerSettings, layer_settings, GDS_RENDER, LAYER_SETTINGS, GObject)
+
+#define GDS_RENDER_TYPE_LAYER_SETTINGS (layer_settings_get_type())
+
+/**
+ * @brief Maximum length of a layer mapping CSV line
+ */
+#define CSV_LINE_MAX_LEN (1024)
+
+/**
+ * @brief New LayerSettings object
+ * @return New object
+ */
+LayerSettings *layer_settings_new();
+
+/**
+ * @brief layer_settings_append_layer_info
+ * @param settings LayerSettings object.
+ * @param info Info to append
+ * @return Error code. 0 if successful
+ * @note \p info is copied internally. You can free this struct afterwards.
+ */
+int layer_settings_append_layer_info(LayerSettings *settings, struct layer_info *info);
+
+/**
+ * @brief Clear all layers in this settings object
+ * @param settings LayerSettings object
+ */
+void layer_settings_clear(LayerSettings *settings);
+
+/**
+ * @brief Remove a specific layer number from the layer settings.
+ * @param settings LayerSettings object
+ * @param layer Layer number
+ * @return Error code. 0 if successful
+ */
+int layer_settings_remove_layer(LayerSettings *settings, int layer);
+
+/**
+ * @brief Get a GList with layer_info structs
+ *
+ * This function returns a GList with all layer_info structs in rendering order
+ * (bottom to top) that shall be rendered.
+ *
+ * @param settings LayerSettings object
+ * @return GList with struct layer_info elements.
+ */
+GList *layer_settings_get_layer_info_list(LayerSettings *settings);
+
+/**
+ * @brief Write layer settings to a CSV file.
+ *
+ * This function writes the layer settings to a CSV file according to the
+ * layer mapping specification (@ref lmf-spec)
+ * @param settings LayerSettings object
+ * @param path Output path for CSV file.
+ * @return 0 if successful
+ */
+int layer_settings_to_csv(LayerSettings *settings, const char *path);
+
+/**
+ * @brief Load new layer Settings from CSV
+ *
+ * This function loads the layer information from a CSV file.
+ * All data inside the \p settings is cleared beforehand.
+ *
+ * @param settings Settings to write to.
+ * @param path CSV file path
+ * @return 0 if successful
+ */
+int layer_settings_load_from_csv(LayerSettings *settings, const char *path);
+
+G_END_DECLS
+
+#endif // _LAYER_INFO_H_

include/gds-render/output-renderers/cairo-renderer.h

@@ -0,0 +1,60 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+/**
+ * @file cairo-renderer.h
+ * @brief Header File for Cairo output renderer
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+#ifndef _CAIRO_OUTPUT_H_
+#define _CAIRO_OUTPUT_H_
+
+#include <gds-render/gds-utils/gds-types.h>
+#include <gds-render/output-renderers/gds-output-renderer.h>
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+/** @addtogroup Cairo-Renderer
+ *  @{
+ */
+
+G_DECLARE_FINAL_TYPE(CairoRenderer, cairo_renderer, GDS_RENDER, CAIRO_RENDERER, GdsOutputRenderer)
+
+#define GDS_RENDER_TYPE_CAIRO_RENDERER (cairo_renderer_get_type())
+
+#define MAX_LAYERS (300) /**< \brief Maximum layer count the output renderer can process. Typically GDS only specifies up to 255 layers.*/
+
+/**
+ * @brief Create new CairoRenderer for SVG output
+ * @return New object
+ */
+CairoRenderer *cairo_renderer_new_svg();
+
+
+/**
+ * @brief Create new CairoRenderer for PDF output
+ * @return New object
+ */
+CairoRenderer *cairo_renderer_new_pdf();
+
+/** @} */
+
+G_END_DECLS
+
+#endif /* _CAIRO_OUTPUT_H_ */

include/gds-render/output-renderers/external-renderer-interfaces.h

@@ -0,0 +1,109 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __EXTERNAL_RENDERER_INTERFACES_H__
+#define __EXTERNAL_RENDERER_INTERFACES_H__
+
+#ifndef xstr
+
+#define xstr(a) str(a)
+#define str(a) #a
+
+#endif /* xstr */
+
+/**
+ * @addtogroup ExternalRenderer
+ * @{
+ */
+
+/**
+ * @brief This define is used to export a function from a shared object
+ */
+#define EXPORT_FUNC __attribute__((visibility("default")))
+
+/**
+ * @brief This define is used to export a variable symbol from a shared object
+ */
+#define EXPORT_VAR EXPORT_FUNC
+
+/**
+ * @brief Function name expected to be found in external library for rendering.
+ *
+ * The function has to be defined as follows:
+ * @code
+ * int EXTERNAL_LIBRARY_RENDER_FUNCTION(struct gds_cell *toplevel, GList *layer_info_list, const char *output_file_name, double scale);
+ * @endcode
+ */
+#define EXTERNAL_LIBRARY_RENDER_FUNCTION exported_render_cell_to_file
+
+/**
+ * @brief Function name expected to be found in external library for initialization.
+ *
+ * @code
+ * int EXTERNAL_LIBRARY_INIT_FUNCTION(const char *option_string, const char *version_string);
+ * @endcode
+ */
+#define EXTERNAL_LIBRARY_INIT_FUNCTION exported_init
+
+/**
+ * @brief Function name expected to be found in external library for finalizing.
+ *
+ * @code
+ * int EXTERNAL_LIBRARY_FINALIZE_FUNCTION(void);
+ * @endcode
+ */
+#define EXTERNAL_LIBRARY_FINALIZE_FUNCTION exported_finalize
+
+/**
+ * @brief Global integer specified by an external renderer to signal, that the init and render functions shall be executed in a subprocess
+ *
+ * The pure presence of this symbol name causes forking. The content of this variable is don't care.
+ * @note Use this if you mess with the internal structures of gds-render
+ */
+#define EXTERNAL_LIBRARY_FORK_REQUEST exported_fork_request
+
+/**
+ * @brief Define for declaring the exported functions.
+ *
+ * This not only helps with the declaration but also makes the symbols visible, so they can be called from outside the library
+ */
+#define EXPORTED_FUNC_DECL(FUNC) EXPORT_FUNC FUNC
+
+/**
+ * @brief Define for declaring exported variables
+ *
+ * This not only helps with the declaration but also makes the symbols visible, so they can be accessed from outside the library
+ */
+#define EXPORTED_VAR_DECL(VAR) EXPORT_VAR VAR
+
+/**
+ * @brief Define for declaring variables based on a define expansion
+ * @note If you want to declare an exported variable use @ref EXPORTED_VAR_DECL
+ */
+#define VAR_DECL(VAR) VAR
+
+/**
+ * @brief Define for declaring functions based on a define expansion
+ * @note If you want to declare an exported function use @ref EXPORTED_FUNC_DECL
+ */
+#define FUNC_DECL(FUNC) FUNC
+
+/** @} */
+
+#endif /* __EXTERNAL_RENDERER_INTERFACES_H__ */

include/gds-render/output-renderers/external-renderer.h

@@ -0,0 +1,62 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file external-renderer.h
+ * @brief Render according to command line parameters
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup ExternalRenderer
+ * @{
+ */
+
+#ifndef _EXTERNAL_RENDERER_H_
+#define _EXTERNAL_RENDERER_H_
+
+#include <gds-render/output-renderers/gds-output-renderer.h>
+#include <gds-render/gds-utils/gds-types.h>
+#include <gds-render/output-renderers/external-renderer-interfaces.h>
+
+G_BEGIN_DECLS
+
+#define GDS_RENDER_TYPE_EXTERNAL_RENDERER (external_renderer_get_type())
+
+G_DECLARE_FINAL_TYPE(ExternalRenderer, external_renderer, GDS_RENDER, EXTERNAL_RENDERER, GdsOutputRenderer)
+
+/**
+ * @brief Create new ExternalRenderer object
+ * @return New object
+ */
+ExternalRenderer *external_renderer_new();
+
+/**
+ * @brief Create new ExternalRenderer object with specified shared object path
+ * @param so_path Path to shared object, the rendering function is searched in
+ * @param param_string Command line parameter string passed to external renderer
+ * @return New object.
+ */
+ExternalRenderer *external_renderer_new_with_so_and_param(const char *so_path, const char *param_string);
+
+G_END_DECLS
+
+#endif /* _EXTERNAL_RENDERER_H_ */
+
+/** @} */

include/gds-render/output-renderers/gds-output-renderer.h

@@ -0,0 +1,161 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file gds-output-renderer.h
+ * @brief Header for output renderer base class
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup GdsOutputRenderer
+ * @{
+ */
+
+#ifndef _GDS_OUTPUT_RENDERER_H_
+#define _GDS_OUTPUT_RENDERER_H_
+
+#include <gds-render/gds-utils/gds-types.h>
+#include <glib-object.h>
+#include <glib.h>
+#include <gds-render/layer/layer-settings.h>
+
+G_BEGIN_DECLS
+
+#define GDS_RENDER_TYPE_OUTPUT_RENDERER (gds_output_renderer_get_type())
+
+G_DECLARE_DERIVABLE_TYPE(GdsOutputRenderer, gds_output_renderer, GDS_RENDER, OUTPUT_RENDERER, GObject);
+
+/**
+ * @brief Base output renderer class structure.
+ * @note This structure is only used for internal inheritance of GObjects. Do not use in code outside of these classes.
+ */
+struct _GdsOutputRendererClass {
+	GObjectClass parent_class;
+
+	/**
+	 * @brief Virtual render output function. Overwritten by final class implementation
+	 */
+	int (*render_output)(GdsOutputRenderer *renderer,
+				struct gds_cell *cell,
+	                        double scale);
+	gpointer padding[4];
+};
+
+enum {
+	GDS_OUTPUT_RENDERER_GEN_ERR = -100, /**< @brief Error set by the _GdsOutputRendererClass::render_output virtual function, if renderer is invalid. */
+	GDS_OUTPUT_RENDERER_PARAM_ERR = -200 /**< @brief Error set by the _GdsOutputRendererClass::render_output virtual function, if parameters are faulty. */
+};
+
+/**
+ * @brief Create a new GdsOutputRenderer GObject.
+ * @return New object
+ */
+GdsOutputRenderer *gds_output_renderer_new();
+
+/**
+ * @brief Create a new GdsOutputRenderer GObject with its properties
+ * @param output_file Output file of the renderer
+ * @param layer_settings Layer settings object
+ * @return New object
+ */
+GdsOutputRenderer *gds_output_renderer_new_with_props(const char *output_file, LayerSettings *layer_settings);
+
+/**
+ * @brief gds_output_renderer_render_output
+ * @param renderer Renderer object
+ * @param cell Cell to render
+ * @param scale scale value. The output is scaled *down* by this value
+ * @return 0 if successful
+ */
+int gds_output_renderer_render_output(GdsOutputRenderer *renderer,
+                                        struct gds_cell *cell,
+                                        double scale);
+
+/**
+ * @brief Convenience function for setting the "output-file" property
+ * @param renderer Renderer object
+ * @param file_name Output file path
+ */
+void gds_output_renderer_set_output_file(GdsOutputRenderer *renderer, const gchar *file_name);
+
+/**
+ * @brief Convenience function for getting the "output-file" property
+ * @param renderer
+ * @return Output file path. This must not be freed
+ */
+const char *gds_output_renderer_get_output_file(GdsOutputRenderer *renderer);
+
+/**
+ * @brief Get layer settings
+ *
+ * This is a convenience function for getting the
+ * "layer-settings" property. This also references it.
+ * This is to prevent race conditions with another thread that might
+ * alter the layer settings before they are read out.
+ *
+ * @param renderer Renderer
+ * @return Layer settings object
+ */
+LayerSettings *gds_output_renderer_get_and_ref_layer_settings(GdsOutputRenderer *renderer);
+
+/**
+ * @brief Set layer settings
+ *
+ * This is a convenience function for setting the
+ * "layer-settings" property.
+ *
+ * If another Layer settings has previously been supplied,
+ * it is unref'd.
+ *
+ * @param renderer Renderer
+ * @param settings LayerSettings object
+ */
+void gds_output_renderer_set_layer_settings(GdsOutputRenderer *renderer, LayerSettings *settings);
+
+/**
+ * @brief Render output asynchronously
+ *
+ * This function will render in a separate thread.
+ * To wait for the completion of the rendering process.
+ *
+ * @note A second async thread cannot be spawned.
+ *
+ * @param renderer Output renderer
+ * @param cell Cell to render
+ * @param scale Scale
+ * @return 0 if successful. In case no thread can be spawned < 0
+ */
+int gds_output_renderer_render_output_async(GdsOutputRenderer *renderer, struct gds_cell *cell, double scale);
+
+/**
+ * @brief This function emits the 'progress-changed' in the thread/context that triggered an asynchronous rendering
+ *
+ * If the rendering is not asynchronous, this function has no effect.
+ *
+ * @param renderer GdsOutputrenderer object
+ * @param status Status to supply to signal emission
+ */
+void gds_output_renderer_update_async_progress(GdsOutputRenderer *renderer, const char *status);
+
+G_END_DECLS
+
+#endif /* _GDS_OUTPUT_RENDERER_H_ */
+
+/** @} */

include/gds-render/output-renderers/latex-renderer.h

@@ -0,0 +1,74 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file latex-renderer.h
+ * @brief LaTeX output renderer
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup LaTeX-Renderer
+ * @{
+ */
+
+#ifndef _LATEX_OUTPUT_H_
+#define _LATEX_OUTPUT_H_
+
+#include <gds-render/output-renderers/gds-output-renderer.h>
+#include <gds-render/gds-utils/gds-types.h>
+
+G_BEGIN_DECLS
+
+G_DECLARE_FINAL_TYPE(LatexRenderer, latex_renderer, GDS_RENDER, LATEX_RENDERER, GdsOutputRenderer)
+
+#define GDS_RENDER_TYPE_LATEX_RENDERER (latex_renderer_get_type())
+
+/**
+ * @brief Buffer for LaTeX Code line in KiB
+ */
+#define LATEX_LINE_BUFFER_KB (10)
+
+/**
+ * @brief Create new LatexRenderer object
+ * @return New object
+ */
+LatexRenderer *latex_renderer_new();
+
+/**
+ * @brief Create new LatexRenderer object
+ *
+ * This function sets the 'pdf-layers' and 'standalone'
+ * properties for the newly created object.
+ *
+ * They can later be changes by modifying the properties again.
+ * On top of that, The options can be changed in the resulting
+ * LaTeX output file if needed.
+ *
+ * @param pdf_layers If PDF OCR layers should be enabled
+ * @param standalone If output TeX file should be standalone compilable
+ * @return New object
+ */
+LatexRenderer *latex_renderer_new_with_options(gboolean pdf_layers, gboolean standalone);
+
+G_END_DECLS
+
+#endif /* _LATEX_OUTPUT_H_ */
+
+/** @} */

include/gds-render/version.h

@@ -14,16 +14,17 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef __GDSPARSE_H__
-#define __GDSPARSE_H__
+/**
+ * @addtogroup version
+ * @{
+ */
 
-#include <glib.h>
-#include "gds-types.h"
+/** @brief This string holds the @ref git-version-num of the app */
+extern const char *_app_version_string;
 
-int parse_gds_from_file(const char *filename, GList **library_array);
-int clear_lib_list(GList **library_list);
-
-#endif /* __GDSPARSE_H__ */
+/** @brief This string holds the git commit hash of the current HEAD revision */
+extern const char *_app_git_commit;
+/** @} */

include/gds-render/widgets/activity-bar.h

@@ -0,0 +1,68 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file activity-bar.h
+ * @brief Header file for activity bar widget
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup ActivityBar
+ * @ingroup Widgets
+ * @{
+ */
+
+#ifndef __LAYER_ELEMENT_H__
+#define __LAYER_ELEMENT_H__
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+/* Creates Class structure etc */
+G_DECLARE_FINAL_TYPE(ActivityBar, activity_bar, ACTIVITY, BAR, GtkBox)
+
+#define TYPE_ACTIVITY_BAR (activity_bar_get_type())
+
+/**
+ * @brief Create new Object ActivityBar
+ * @return New object. In case of error: NULL.
+ */
+ActivityBar *activity_bar_new();
+
+/**
+ * @brief Deletes all applied tasks and sets bar to "Ready".
+ * @param[in] bar AcitivityBar object.
+ */
+void activity_bar_set_ready(ActivityBar *bar);
+
+/**
+ * @brief Enable spinner and set \p text. If text is NULL, 'Working...' is displayed
+ * @param bar Activity bar object
+ * @param text Text to display, may be NULL
+
+ */
+void activity_bar_set_busy(ActivityBar *bar, const char *text);
+
+G_END_DECLS
+
+#endif /* __LAYER_ELEMENT_H__ */
+
+/** @} */

include/gds-render/widgets/conv-settings-dialog.h

@@ -0,0 +1,102 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file conv-settings-dialog.h
+ * @brief Header file for the Conversion Settings Dialog
+ * @author Mario.Huettel@gmx.net <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup RendererSettingsDialog
+ * @ingroup Widgets
+ * @{
+ */
+
+#ifndef __CONV_SETTINGS_DIALOG_H__
+#define __CONV_SETTINGS_DIALOG_H__
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+/** @brief return type of the RedererSettingsDialog */
+enum output_renderer {RENDERER_LATEX_TIKZ, RENDERER_CAIROGRAPHICS_PDF, RENDERER_CAIROGRAPHICS_SVG};
+
+G_DECLARE_FINAL_TYPE(RendererSettingsDialog, renderer_settings_dialog, RENDERER, SETTINGS_DIALOG, GtkDialog)
+
+/**
+ * @brief Create a new RedererSettingsDialog GObject
+ * @param parent Parent window
+ * @return Created dialog object
+ */
+RendererSettingsDialog *renderer_settings_dialog_new(GtkWindow *parent);
+
+#define RENDERER_TYPE_SETTINGS_DIALOG (renderer_settings_dialog_get_type())
+
+/**
+ * @brief This struct holds the renderer configuration
+ */
+struct render_settings {
+	double scale; /**< @brief Scale image down by this factor. @note Used to keep image in bound of maximum coordinate limit */
+	enum output_renderer renderer; /**< The renderer to use */
+	gboolean tex_pdf_layers; /**< Create OCG layers when rendering with TikZ */
+	gboolean tex_standalone; /**< Create a standalone compile TeX file */
+};
+
+G_END_DECLS
+
+/**
+ * @brief Apply settings to dialog
+ * @param dialog
+ * @param settings
+ */
+void renderer_settings_dialog_set_settings(RendererSettingsDialog *dialog, struct render_settings *settings);
+
+/**
+ * @brief Get the settings configured in the dialog
+ * @param dialog
+ * @param settings
+ */
+void renderer_settings_dialog_get_settings(RendererSettingsDialog *dialog, struct render_settings *settings);
+
+/**
+ * @brief renderer_settings_dialog_set_cell_width Set width for rendered cell
+ * @param dialog
+ * @param width Width in database units
+ */
+void renderer_settings_dialog_set_cell_width(RendererSettingsDialog *dialog, unsigned int width);
+
+/**
+ * @brief renderer_settings_dialog_set_cell_height Set height for rendered cell
+ * @param dialog
+ * @param height Height in database units
+ */
+void renderer_settings_dialog_set_cell_height(RendererSettingsDialog *dialog, unsigned int height);
+
+/**
+ * @brief renderer_settings_dialog_set_database_unit_scale Set database scale
+ * @param dialog dialog element
+ * @param unit_in_meters Database unit in meters
+ */
+void renderer_settings_dialog_set_database_unit_scale(RendererSettingsDialog *dialog, double unit_in_meters);
+
+#endif /* __CONV_SETTINGS_DIALOG_H__ */
+
+/** @} */

include/gds-render/widgets/layer-element.h

@@ -0,0 +1,149 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file layer-element.h
+ * @brief Implementation of the layer element used for configuring layer colors etc.
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup LayerElement
+ * @ingroup Widgets
+ * @{
+ */
+
+#ifndef __LAYER_ELEMENT_H__
+#define __LAYER_ELEMENT_H__
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+/* Creates Class structure etc */
+G_DECLARE_FINAL_TYPE(LayerElement, layer_element, LAYER, ELEMENT, GtkListBoxRow)
+
+#define TYPE_LAYER_ELEMENT (layer_element_get_type())
+
+typedef struct _LayerElementPriv {
+	GtkEntry *name;
+	GtkLabel *layer;
+	int layer_num;
+	GtkEventBox *event_handle;
+	GtkColorButton *color;
+	GtkCheckButton *export;
+} LayerElementPriv;
+
+struct _LayerElement {
+	/* Inheritance */
+	GtkListBoxRow parent;
+	/* Custom Elements */
+	LayerElementPriv priv;
+};
+
+/**
+ * @brief This structure holds the necessary data to set up a LayerElement for Drag'n'Drop
+ */
+struct layer_element_dnd_data {
+	/** @brief Array of target entries for the DnD operation */
+	GtkTargetEntry *entries;
+	/** @brief Count of elements in layer_element_dnd_data::entries array */
+	int entry_count;
+	/** @brief Callback function for drag_begin event */
+	void (*drag_begin)(GtkWidget *, GdkDragContext *, gpointer);
+	/** @brief Callback fucktion for data_get event */
+	void (*drag_data_get)(GtkWidget *, GdkDragContext *, GtkSelectionData *, guint, guint, gpointer);
+	/** @brief Callback function for drag_end event */
+	void (*drag_end)(GtkWidget *, GdkDragContext *, gpointer);
+};
+
+/**
+ * @brief Create new layer element object
+ * @return new object
+ */
+GtkWidget *layer_element_new(void);
+
+/**
+ * @brief get name of the layer
+ * @param elem Layer element
+ * @return Name. Must not be changed, freed or anything else.
+ */
+const char *layer_element_get_name(LayerElement *elem);
+
+/**
+ * @brief layer_element_set_name
+ * @param elem set the name of the layer
+ * @param name Name. Can be freed after call to this function
+ */
+void layer_element_set_name(LayerElement *elem, const char* name);
+
+/**
+ * @brief Set layer number for this layer
+ * @param elem Layer element
+ * @param layer Layer number
+ */
+void layer_element_set_layer(LayerElement *elem, int layer);
+
+/**
+ * @brief Get layer number
+ * @param elem Layer Element
+ * @return Number of this layer
+ */
+int layer_element_get_layer(LayerElement *elem);
+
+/**
+ * @brief Set export flag for this layer
+ * @param elem Layer Element
+ * @param export flag
+ */
+void layer_element_set_export(LayerElement *elem, gboolean export);
+
+/**
+ * @brief Get export flag of layer
+ * @param elem Layer Element
+ * @return
+ */
+gboolean layer_element_get_export(LayerElement *elem);
+
+/**
+ * @brief Get color of layer
+ * @param elem Layer Element
+ * @param rgba RGBA color
+ */
+void layer_element_get_color(LayerElement *elem, GdkRGBA *rgba);
+
+/**
+ * @brief Set color of layer
+ * @param elem Layer Element
+ * @param rgba RGBA color
+ */
+void layer_element_set_color(LayerElement *elem, GdkRGBA *rgba);
+
+/**
+ * @brief Setup drag and drop of \p elem for use in the LayerSelector
+ * @param elem Layer element to set up
+ * @param data Data array containing the necessary callbacks etc. for drag and drop.
+ */
+void layer_element_set_dnd_callbacks(LayerElement *elem, struct layer_element_dnd_data *data);
+
+G_END_DECLS
+
+#endif /* __LAYER_ELEMENT_H__ */
+
+/** @} */

latex-output/latex-output.c

@@ -1,240 +0,0 @@
-/*
- * GDSII-Converter
- * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
- *
- * This file is part of GDSII-Converter.
- *
- * GDSII-Converter is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * GDSII-Converter is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "latex-output.h"
-#include <math.h>
-
-#define WRITEOUT_BUFFER(buff) fwrite((buff)->str, sizeof(char), (buff)->len, tex_file)
-
-static void write_layer_definitions(FILE *tex_file, GList *layer_infos, GString *buffer)
-{
-	GList *list;
-	struct layer_info *lifo;
-	char *end_str;
-
-	for (list = layer_infos; list != NULL; list = list->next) {
-		lifo = (struct layer_info *)list->data;
-		g_string_printf(buffer, "\\pgfdeclarelayer{l%d}\n\\definecolor{c%d}{rgb}{%lf,%lf,%lf}\n",
-				lifo->layer, lifo->layer,
-				lifo->color.red, lifo->color.green, lifo->color.blue);
-		WRITEOUT_BUFFER(buffer);
-	}
-
-	g_string_printf(buffer, "\\pgfsetlayers{");
-	WRITEOUT_BUFFER(buffer);
-
-	for (list = layer_infos; list != NULL; list = list->next) {
-		lifo = (struct layer_info *)list->data;
-
-		if (list->next == NULL)
-			end_str = ",main}";
-		else
-			end_str = ",";
-		g_string_printf(buffer, "l%d%s", lifo->layer, end_str);
-		WRITEOUT_BUFFER(buffer);
-	}
-	fwrite("\n", sizeof(char), 1, tex_file);
-}
-
-/**
- * @brief write_layer_env
- * @param tex_file
- * @param layer
- * @param buffer
- * @return TRUE if layer is placeable
- */
-static gboolean write_layer_env(FILE *tex_file, GdkRGBA *color, int layer, GList *linfo, GString *buffer)
-{
-	GList *temp;
-	struct layer_info *inf;
-
-	for (temp = linfo; temp != NULL; temp = temp->next) {
-		inf = (struct layer_info *)temp->data;
-		if (inf->layer == layer) {
-			color->alpha = inf->color.alpha;
-			color->red = inf->color.red;
-			color->green = inf->color.green;
-			color->blue = inf->color.blue;
-			g_string_printf(buffer, "\\begin{pgfonlayer}{l%d}\n\\ifcreatepdflayers\n\\begin{scope}[ocg={ref=%d, status=visible,name={%s}}]\n\\fi]\n",
-					layer, layer, inf->name);
-			WRITEOUT_BUFFER(buffer);
-			return TRUE;
-		}
-	}
-	return FALSE;
-}
-
-
-static void generate_graphics(FILE *tex_file, GList *graphics, GList *linfo, GString *buffer, double scale)
-{
-	GList *temp;
-	GList *temp_vertex;
-	struct gds_graphics *gfx;
-	struct gds_point *pt;
-	GdkRGBA color;
-	static const char *line_caps[] = {"butt", "round", "rect"};
-
-	for (temp = graphics; temp != NULL; temp = temp->next) {
-		gfx = (struct gds_graphics *)temp->data;
-		if (write_layer_env(tex_file, &color, (int)gfx->layer, linfo, buffer) == TRUE) {
-
-			/* Layer is defined => create graphics */
-			if (gfx->gfx_type == GRAPHIC_POLYGON || gfx->gfx_type == GRAPHIC_BOX ) {
-				g_string_printf(buffer, "\\draw[line width=0.00001 pt, draw={c%d}, fill={c%d}, fill opacity={%lf}] ",
-						gfx->layer, gfx->layer, color.alpha);
-				WRITEOUT_BUFFER(buffer);
-				/* Append vertices */
-				for (temp_vertex = gfx->vertices; temp_vertex != NULL; temp_vertex = temp_vertex->next) {
-					pt = (struct gds_point *)temp_vertex->data;
-					g_string_printf(buffer, "(%lf pt, %lf pt) -- ", ((double)pt->x)/scale, ((double)pt->y)/scale);
-					WRITEOUT_BUFFER(buffer);
-				}
-				g_string_printf(buffer, "cycle;\n");
-				WRITEOUT_BUFFER(buffer);
-			} else if (gfx->gfx_type == GRAPHIC_PATH) {
-
-				if (g_list_length(gfx->vertices) < 2) {
-					printf("Cannot write path with less than 2 points\n");
-					break;
-				}
-
-				if (gfx->path_render_type < 0 || gfx->path_render_type > 2) {
-					printf("Path type unrecognized. Setting to 'flushed'\n");
-					gfx->path_render_type = PATH_FLUSH;
-				}
-
-				g_string_printf(buffer, "\\draw[line width=%lf pt, draw={c%d}, opacity={%lf}, cap=%s] ",
-						gfx->width_absolute/scale, gfx->layer, color.alpha,
-						line_caps[gfx->path_render_type]);
-				WRITEOUT_BUFFER(buffer);
-
-				/* Append vertices */
-				for (temp_vertex = gfx->vertices; temp_vertex != NULL; temp_vertex = temp_vertex->next) {
-					pt = (struct gds_point *)temp_vertex->data;
-					g_string_printf(buffer, "(%lf pt, %lf pt)%s",
-							((double)pt->x)/scale,
-							((double)pt->y)/scale,
-							(temp_vertex->next ? " -- " : ""));
-					WRITEOUT_BUFFER(buffer);
-				}
-				g_string_printf(buffer, ";\n");
-				WRITEOUT_BUFFER(buffer);
-			}
-
-			g_string_printf(buffer, "\\ifcreatepdflayers\n\\end{scope}\n\\fi\n\\end{pgfonlayer}\n");
-			WRITEOUT_BUFFER(buffer);
-		}
-
-	} /* For graphics */
-}
-
-
-static void render_cell(struct gds_cell *cell, GList *layer_infos, FILE *tex_file, GString *buffer, double scale)
-{
-
-	GList *list_child;
-	struct gds_cell_instance *inst;
-
-	/* Draw polygons of current cell */
-	generate_graphics(tex_file, cell->graphic_objs, layer_infos, buffer, scale);
-
-	/* Draw polygons of childs */
-	for (list_child = cell->child_cells; list_child != NULL; list_child = list_child->next) {
-		inst = (struct gds_cell_instance *)list_child->data;
-
-		/* Abort if cell has no reference */
-		if (!inst->cell_ref)
-			continue;
-
-		/* generate translation scope */
-		g_string_printf(buffer, "\\begin{scope}[shift={(%lf pt,%lf pt)}]\n",
-				((double)inst->origin.x)/scale,((double)inst->origin.y)/scale);
-		WRITEOUT_BUFFER(buffer);
-
-		g_string_printf(buffer, "\\begin{scope}[rotate=%lf]\n", inst->angle);
-		WRITEOUT_BUFFER(buffer);
-
-		g_string_printf(buffer, "\\begin{scope}[yscale=%lf, xscale=%lf]\n", (inst->flipped ? -1*inst->magnification : inst->magnification),
-				inst->magnification);
-		WRITEOUT_BUFFER(buffer);
-
-		render_cell(inst->cell_ref, layer_infos, tex_file, buffer, scale);
-
-		g_string_printf(buffer, "\\end{scope}\n");
-		WRITEOUT_BUFFER(buffer);
-
-		g_string_printf(buffer, "\\end{scope}\n");
-		WRITEOUT_BUFFER(buffer);
-
-		g_string_printf(buffer, "\\end{scope}\n");
-		WRITEOUT_BUFFER(buffer);
-	}
-
-}
-
-void latex_render_cell_to_code(struct gds_cell *cell, GList *layer_infos, FILE *tex_file, double scale,
-			       gboolean create_pdf_layers, gboolean standalone_document)
-{
-	GString *working_line;
-
-
-	if (!tex_file || !layer_infos || !cell)
-		return;
-
-	/* 10 kB Line working buffer should be enough */
-	working_line = g_string_new_len(NULL, LATEX_LINE_BUFFER_KB*1024);
-
-	/* standalone foo */
-	g_string_printf(working_line, "\\newif\\iftestmode\n\\testmode%s\n",
-			(standalone_document ? "true" : "false"));
-	WRITEOUT_BUFFER(working_line);
-	g_string_printf(working_line, "\\newif\\ifcreatepdflayers\n\\createpdflayers%s\n",
-			(create_pdf_layers ? "true" : "false"));
-	WRITEOUT_BUFFER(working_line);
-	g_string_printf(working_line, "\\iftestmode\n");
-	WRITEOUT_BUFFER(working_line);
-	g_string_printf(working_line, "\\documentclass[tikz]{standalone}\n\\usepackage{xcolor}\n\\usetikzlibrary{ocgx}\n\\begin{document}\n");
-	WRITEOUT_BUFFER(working_line);
-	g_string_printf(working_line, "\\fi\n");
-	WRITEOUT_BUFFER(working_line);
-
-	/* Write layer definitions */
-	write_layer_definitions(tex_file, layer_infos, working_line);
-
-	/* Open tikz Pictute */
-	g_string_printf(working_line, "\\begin{tikzpicture}\n");
-	WRITEOUT_BUFFER(working_line);
-
-	/* Generate graphics output */
-	render_cell(cell, layer_infos, tex_file, working_line, scale);
-
-
-	g_string_printf(working_line, "\\end{tikzpicture}\n");
-	WRITEOUT_BUFFER(working_line);
-
-	g_string_printf(working_line, "\\iftestmode\n");
-	WRITEOUT_BUFFER(working_line);
-	g_string_printf(working_line, "\\end{document}\n");
-	WRITEOUT_BUFFER(working_line);
-	g_string_printf(working_line, "\\fi\n");
-	WRITEOUT_BUFFER(working_line);
-
-	fflush(tex_file);
-	g_string_free(working_line, TRUE);
-}

latex-output/latex-output.h

@@ -1,33 +0,0 @@
-/*
- * GDSII-Converter
- * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
- *
- * This file is part of GDSII-Converter.
- *
- * GDSII-Converter is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * GDSII-Converter is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef __LATEX_OUTPUT_H__
-#define __LATEX_OUTPUT_H__
-
-#include "../gds-parser/gds-types.h"
-#include <glib.h>
-#include <stdio.h>
-#include "../layer-selector.h"
-
-#define LATEX_LINE_BUFFER_KB (10)
-
-void latex_render_cell_to_code(struct gds_cell *cell, GList *layer_infos, FILE *tex_file, double scale,
-			       gboolean create_pdf_layers, gboolean standalone_document);
-
-#endif /* __LATEX_OUTPUT_H__ */

layer-selector.c

@@ -1,436 +0,0 @@
-/*
- * GDSII-Converter
- * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
- *
- * This file is part of GDSII-Converter.
- *
- * GDSII-Converter is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * GDSII-Converter is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "layer-selector.h"
-#include "gds-parser/gds-parser.h"
-#include "widgets/layer-element.h"
-#include <glib.h>
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-static GtkWidget *global_load_button;
-static GtkWidget *global_save_button;
-static GtkListBox *global_list_box;
-
-void delete_layer_info_struct(struct layer_info *info)
-{
-	if (info)
-		free(info);
-}
-
-/**
- * @brief export_rendered_layer_info
- * @return new list with all info elements needed to render cells
- */
-GList *export_rendered_layer_info()
-{
-	GList *info_list = NULL;
-	LayerElement *le;
-	struct layer_info *linfo;
-	GList *row_list;
-	GList *temp;
-	int i;
-
-	row_list = gtk_container_get_children(GTK_CONTAINER(global_list_box));
-
-	/* Iterate through  widgets and add layers that shall be exported */
-	for (i = 0, temp = row_list; temp != NULL; temp = temp->next, i++) {
-
-		le = LAYER_ELEMENT(temp->data);
-
-		if (layer_element_get_export(le) == TRUE) {
-			/* Allocate new info and fill with info */
-			linfo = (struct layer_info *)malloc(sizeof(struct layer_info));
-			layer_element_get_color(le, &linfo->color);
-			linfo->layer = layer_element_get_layer(le);
-			linfo->stacked_position = i;
-			linfo->name = (char *)layer_element_get_name(le);
-
-			/* Append to list */
-			info_list = g_list_append(info_list, (gpointer)linfo);
-		}
-	}
-
-	return info_list;
-}
-
-void clear_list_box_widgets(GtkListBox *box)
-{
-	GList *list;
-	GList *temp;
-
-	list = gtk_container_get_children(GTK_CONTAINER(box));
-	for (temp = list; temp != NULL; temp = temp->next) {
-		gtk_container_remove(GTK_CONTAINER(box), GTK_WIDGET(temp->data));
-	}
-	/* Widgets are already destroyed when removed from box because they are only referenced inside the container */
-
-	g_list_free(list);
-
-	/* Deactivate buttons */
-	gtk_widget_set_sensitive(global_load_button, FALSE);
-	gtk_widget_set_sensitive(global_save_button, FALSE);
-}
-
-static gboolean check_if_layer_widget_exists(int layer) {
-	GList *list;
-	GList *temp;
-	LayerElement *widget;
-	gboolean ret = FALSE;
-
-	list = gtk_container_get_children(GTK_CONTAINER(global_list_box));
-
-	for (temp = list; temp != NULL; temp = temp->next) {
-		widget = LAYER_ELEMENT(temp->data);
-		if (layer_element_get_layer(widget) == layer) {
-			ret = TRUE;
-			break;
-		}
-	}
-
-	g_list_free(list);
-
-	return ret;
-}
-
-static void analyze_cell_layers(GtkListBox *listbox, struct gds_cell *cell)
-{
-	GList *graphics;
-	struct gds_graphics *gfx;
-	int layer;
-	GtkWidget *le;
-
-	for (graphics = cell->graphic_objs; graphics != NULL; graphics = graphics->next) {
-		gfx = (struct gds_graphics *)graphics->data;
-		layer = (int)gfx->layer;
-		if (check_if_layer_widget_exists(layer) == FALSE) {
-			le = layer_element_new();
-			layer_element_set_layer(LAYER_ELEMENT(le), layer);
-			gtk_list_box_insert(listbox, le, -1);
-			gtk_widget_show(le);
-		}
-	}
-}
-
-gint sort_func(GtkListBoxRow *row1, GtkListBoxRow *row2, gpointer unused)
-{
-	LayerElement *le1, *le2;
-	gint ret;
-
-	le1 = LAYER_ELEMENT(row1);
-	le2 = LAYER_ELEMENT(row2);
-
-	ret = layer_element_get_layer(le1) - layer_element_get_layer(le2);
-
-	return ret;
-}
-
-void generate_layer_widgets(GtkListBox *listbox, GList *libs)
-{
-	GList *cell_list = NULL;
-	struct gds_library *lib;
-
-	global_list_box = listbox;
-
-	clear_list_box_widgets(listbox);
-	gtk_list_box_set_sort_func(listbox, sort_func, NULL, NULL);
-
-	for (; libs != NULL; libs = libs->next) {
-		lib = (struct gds_library *)libs->data;
-		for (cell_list = lib->cells; cell_list != NULL; cell_list = cell_list->next) {
-			analyze_cell_layers(listbox, (struct gds_cell *)cell_list->data);
-		} /* For Cell List */
-	} /* For libs */
-
-	/* Force sort */
-	gtk_list_box_invalidate_sort(listbox);
-
-	/* Disable sort, so user can sort layers */
-	gtk_list_box_set_sort_func(listbox, NULL, NULL, NULL);
-
-	/* Activate Buttons */
-	gtk_widget_set_sensitive(global_load_button, TRUE);
-	gtk_widget_set_sensitive(global_save_button, TRUE);
-}
-
-/**
- * @brief load_csv_line
- * @param file
- * @param export
- * @param name
- * @param layer
- * @param color
- * @param opacity
- * @return 0 if succesfull, 1 if line was malformatted or parameters are broken, -1 if file end
- */
-static int load_csv_line(GDataInputStream *stream, gboolean *export, char **name, int *layer, GdkRGBA *color)
-{
-	int ret;
-	gsize len;
-	gchar *line;
-	GRegex *regex;
-	GMatchInfo *mi;
-	char *match;
-
-	if ((!export) || (!name) || (!layer) || (!color)) {
-		ret = 1;
-		goto ret_direct;
-	}
-
-	regex = g_regex_new("^(?<layer>[0-9]+),(?<r>[0-9\\.]+),(?<g>[0-9\\.]+),(?<b>[0-9\\.]+),(?<a>[0-9\\.]+),(?<export>[01]),(?<name>.*)$", 0, 0, NULL);
-
-	line = g_data_input_stream_read_line(stream, &len, NULL, NULL);
-	if (!line) {
-		ret = -1;
-		goto destroy_regex;
-	}
-
-	/* Match line in CSV */
-	g_regex_match(regex, line, 0, &mi);
-	if (g_match_info_matches(mi)) {
-		/* Line is valid */
-		match = g_match_info_fetch_named(mi, "layer");
-		*layer = (int)g_ascii_strtoll(match, NULL, 10);
-		g_free(match);
-		match = g_match_info_fetch_named(mi, "r");
-		color->red = g_ascii_strtod(match, NULL);
-		g_free(match);
-		match = g_match_info_fetch_named(mi, "g");
-		color->green = g_ascii_strtod(match, NULL);
-		g_free(match);
-		match = g_match_info_fetch_named(mi, "b");
-		color->blue = g_ascii_strtod(match, NULL);
-		g_free(match);
-		match = g_match_info_fetch_named(mi, "a");
-		color->alpha = g_ascii_strtod(match, NULL);
-		g_free(match);
-		match = g_match_info_fetch_named(mi, "export");
-		*export = ((!strcmp(match, "1")) ? TRUE : FALSE);
-		g_free(match);
-		match = g_match_info_fetch_named(mi, "name");
-		*name = match;
-
-		ret = 0;
-	} else {
-		/* Line is malformatted */
-		printf("Could not recognize line in CSV as valid entry: %s\n", line);
-		ret = 1;
-	}
-
-	g_match_info_free(mi);
-	g_free(line);
-destroy_regex:
-	g_regex_unref(regex);
-ret_direct:
-	return ret;
-
-}
-
-static LayerElement *find_layer_element_in_list(GList *el_list, int layer)
-{
-	LayerElement *ret = NULL;
-	for (; el_list != NULL; el_list = el_list->next) {
-		if (layer_element_get_layer(LAYER_ELEMENT(el_list->data)) == layer) {
-			ret = LAYER_ELEMENT(el_list->data);
-			break;
-		}
-	}
-	return ret;
-}
-
-static void load_layer_mapping_from_file(gchar *file_name)
-{
-	GFile *file;
-	GFileInputStream *stream;
-	GDataInputStream *dstream;
-	LayerElement *le;
-	char *name;
-	gboolean export;
-	int layer;
-	GdkRGBA color;
-	int result;
-	GList *rows;
-	GList *temp;
-
-	file = g_file_new_for_path(file_name);
-	stream = g_file_read(file, NULL, NULL);
-
-	if (!stream)
-		goto destroy_file;
-
-	dstream = g_data_input_stream_new(G_INPUT_STREAM(stream));
-
-	rows = gtk_container_get_children(GTK_CONTAINER(global_list_box));
-
-	/* Reference and remove all rows from box */
-	for (temp = rows; temp != NULL; temp = temp->next) {
-		le = LAYER_ELEMENT(temp->data);
-		/* Referencing protets the widget from being deleted when removed */
-		g_object_ref(G_OBJECT(le));
-		gtk_container_remove(GTK_CONTAINER(global_list_box), GTK_WIDGET(le));
-	}
-
-	while((result = load_csv_line(dstream, &export, &name, &layer, &color)) >= 0) {
-		/* skip broken line */
-		if (result == 1)
-			continue;
-
-		/* Add rows in the same order as in file */
-		if ((le = find_layer_element_in_list(rows, layer))) {
-			gtk_list_box_insert(global_list_box, GTK_WIDGET(le), -1);
-
-			layer_element_set_color(le, &color);
-			layer_element_set_export(le, export);
-			layer_element_set_name(le, name);
-			g_free(name);
-
-			/* Dereference and remove from list */
-			g_object_unref(G_OBJECT(le));
-			rows = g_list_remove(rows, le);
-		}
-	}
-
-	/* Add remaining elements */
-	for (temp = rows; temp != NULL; temp = temp->next) {
-		le = LAYER_ELEMENT(temp->data);
-		/* Referencing protets the widget from being deleted when removed */
-		gtk_list_box_insert(global_list_box, GTK_WIDGET(le), -1);
-		g_object_unref(G_OBJECT(le));
-	}
-
-	/* Delete list */
-	g_list_free(rows);
-
-	/* read line */
-	g_object_unref(dstream);
-	g_object_unref(stream);
-destroy_file:
-	g_object_unref(file);
-}
-
-static void load_mapping_clicked(GtkWidget *button, gpointer user_data)
-{
-	GtkWidget *dialog;
-	gint res;
-	gchar *file_name;
-
-	dialog = gtk_file_chooser_dialog_new("Load Mapping File", GTK_WINDOW(user_data), GTK_FILE_CHOOSER_ACTION_OPEN,
-					     "Cancel", GTK_RESPONSE_CANCEL, "Load Mapping", GTK_RESPONSE_ACCEPT, NULL);
-	res = gtk_dialog_run(GTK_DIALOG(dialog));
-	if (res == GTK_RESPONSE_ACCEPT) {
-		file_name = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
-		load_layer_mapping_from_file(file_name);
-		g_free(file_name);
-	}
-	gtk_widget_destroy(dialog);
-}
-
-static void create_csv_line(LayerElement *layer_element, char *line_buffer, size_t max_len)
-{
-	GString *string;
-	gboolean export;
-	const gchar *name;
-	int layer;
-	GdkRGBA color;
-
-	string = g_string_new_len(NULL, max_len-1);
-
-	/* Extract values */
-	export = layer_element_get_export(layer_element);
-	name = (const gchar*)layer_element_get_name(layer_element);
-	layer = layer_element_get_layer(layer_element);
-	layer_element_get_color(layer_element, &color);
-
-	/* print values to line */
-	g_string_printf(string, "%d,%lf,%lf,%lf,%lf,%d,%s\n",
-			layer, color.red, color.green,
-			color.blue, color.alpha, (export == TRUE ? 1 : 0), name);
-
-	if (string->len > (max_len-1)) {
-		printf("Layer Definition too long. Please shorten Layer Name!!\n");
-		line_buffer[0] = 0x0;
-		return;
-	}
-
-	/* copy max_len bytes of string */
-	strncpy(line_buffer, (char *)string->str, max_len-1);
-	line_buffer[max_len-1] = 0;
-
-	/* Completely remove string */
-	g_string_free(string, TRUE);
-}
-
-static void save_layer_mapping_data(const gchar *file_name, GtkListBox *list_box)
-{
-	FILE *file;
-	char workbuff[512];
-	GList *le_list;
-	GList *temp;
-
-	/* Overwrite existing file */
-	file = fopen((const char *)file_name, "w");
-
-	le_list = gtk_container_get_children(GTK_CONTAINER(list_box));
-
-	/* File format is CSV: <Layer>,<target_pos>,<R>,<G>,<B>,<Alpha>,<Export?>,<Name> */
-	for (temp = le_list; temp != NULL; temp = temp->next) {
-		/* To be sure it is a valid string */
-		workbuff[0] = 0;
-		create_csv_line(LAYER_ELEMENT(temp->data), workbuff, sizeof(workbuff));
-		fwrite(workbuff, sizeof(char), strlen(workbuff), file);
-	}
-
-	g_list_free(le_list);
-
-	/* Save File */
-	fflush(file);
-	fclose(file);
-}
-
-static void save_mapping_clicked(GtkWidget *button, gpointer user_data)
-{
-	GtkWidget *dialog;
-	gint res;
-	gchar *file_name;
-
-	dialog = gtk_file_chooser_dialog_new("Save Mapping File", GTK_WINDOW(user_data), GTK_FILE_CHOOSER_ACTION_SAVE,
-					     "Cancel", GTK_RESPONSE_CANCEL, "Save Mapping", GTK_RESPONSE_ACCEPT, NULL);
-	res = gtk_dialog_run(GTK_DIALOG(dialog));
-	if (res == GTK_RESPONSE_ACCEPT) {
-		file_name = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
-		save_layer_mapping_data(file_name, global_list_box);
-		g_free(file_name);
-	}
-	gtk_widget_destroy(dialog);
-}
-
-void setup_load_mapping_callback(GtkWidget *button, GtkWindow *main_window)
-{
-	g_object_ref(G_OBJECT(button));
-	global_load_button = button;
-	g_signal_connect(button, "clicked", G_CALLBACK(load_mapping_clicked), main_window);
-}
-
-void setup_save_mapping_callback(GtkWidget *button,  GtkWindow *main_window)
-{
-	g_object_ref(G_OBJECT(button));
-	global_save_button = button;
-	g_signal_connect(button, "clicked", G_CALLBACK(save_mapping_clicked), main_window);
-}

layer-selector.h

@@ -1,40 +0,0 @@
-/*
- * GDSII-Converter
- * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
- *
- * This file is part of GDSII-Converter.
- *
- * GDSII-Converter is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * GDSII-Converter is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef __LAYER_SELECTOR_H__
-#define __LAYER_SELECTOR_H__
-
-#include <gtk/gtk.h>
-#include <glib.h>
-
-struct layer_info
-{
-	int layer;
-	char *name;
-	int stacked_position; ///< Lower is bottom, higher is top
-	GdkRGBA color;
-};
-
-void generate_layer_widgets(GtkListBox *listbox, GList *libs);
-void setup_load_mapping_callback(GtkWidget *button, GtkWindow *main_window);
-void setup_save_mapping_callback(GtkWidget *button, GtkWindow *main_window);
-GList *export_rendered_layer_info();
-void delete_layer_info_struct(struct layer_info *info);
-
-#endif /* __LAYER_SELECTOR_H__ */

layer/color-palette.c

@@ -0,0 +1,259 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file color-palette.c
+ * @brief Class representing a color palette
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#include <gds-render/layer/color-palette.h>
+
+struct _ColorPalette {
+		/* Inheritance */
+		GObject parent;
+
+		/* Custom fields */
+		/** @brief The internal array to store the colors */
+		GdkRGBA *color_array;
+		/** @brief The length of the _ColorPalette::color_array array */
+		unsigned int color_array_length;
+
+		/* Dummy bytes to ensure ABI compatibility in future versions */
+		gpointer dummy[4];
+};
+
+G_DEFINE_TYPE(ColorPalette, color_palette, G_TYPE_OBJECT)
+
+/**
+ * @brief Return the number of non empty lines in array
+ *
+ * This function returns the number of non empty lines in an
+ * array. The scanning is either terminated by the given length
+ * or if a \0 terminator is found.
+ *
+ * @param[in] data Array to count lines in
+ * @param[in] length Length of \p data
+ * @return < 0: Error, >=0: Lines
+ */
+static int count_non_empty_lines_in_array(const char *data, size_t length)
+{
+	unsigned int idx;
+	int non_empty_lines = 0;
+	char last_char = '\n';
+
+	if (!data)
+		return -1;
+
+	/* Count each '\n' as a new line if it is not directly preceded by another '\n' */
+	for (idx = 0; idx < length && data[idx]; idx++) {
+		if (data[idx] == '\n' && last_char != '\n')
+			non_empty_lines++;
+		last_char = data[idx];
+	}
+
+	/* Count the last line in case the data does not end with a '\n' */
+	if (data[idx-1] != '\n')
+		non_empty_lines++;
+
+	return non_empty_lines;
+}
+
+/**
+ * @brief color_palette_fill_with_resource
+ * @param palette
+ * @param resource_name
+ * @return 0 if successful
+ */
+static int color_palette_fill_with_resource(ColorPalette *palette, char *resource_name)
+{
+	GBytes *data;
+	char line[10];
+	int line_idx;
+	unsigned int color_idx;
+	int idx;
+	const char *char_array;
+	gsize byte_count;
+	int lines;
+	GRegex *regex;
+	GMatchInfo *mi;
+	char *match;
+
+	if (!palette || !resource_name)
+		return -1;
+
+	data = g_resources_lookup_data(resource_name, 0, NULL);
+
+	if (!data)
+		return -2;
+
+	char_array = (const char *)g_bytes_get_data(data, &byte_count);
+
+	if (!char_array || !byte_count)
+		goto ret_unref_data;
+
+	/* Get maximum lenght of color palette, assuming all entries are valid */
+	lines = count_non_empty_lines_in_array(char_array, byte_count);
+
+	if (lines <= 0)
+		goto ret_unref_data;
+
+	palette->color_array = (GdkRGBA *)malloc(sizeof(GdkRGBA) * (unsigned int)lines);
+
+	/* Setup regex for hexadecimal RGB colors like 'A0CB3F' */
+	regex = g_regex_new("^(?<red>[0-9A-Fa-f][0-9A-Fa-f])(?<green>[0-9A-Fa-f][0-9A-Fa-f])(?<blue>[0-9A-Fa-f][0-9A-Fa-f])$",
+			    0, 0, NULL);
+
+	/* Reset line */
+	line_idx = 0;
+	line[0] = '\0';
+
+	/* Set color index */
+	color_idx = 0;
+
+	/* interate over lines and match */
+	for (idx = 0 ; (unsigned int)idx < byte_count; idx++) {
+		/* Fillup line. */
+		line[line_idx] = char_array[idx];
+
+		/* If end of line/string is reached, process */
+		if (line[line_idx] == '\n' || line[line_idx] == '\0') {
+			line[line_idx] = '\0';
+
+			/* Match the line */
+			g_regex_match(regex, line, 0, &mi);
+			if (g_match_info_matches(mi) && color_idx < (unsigned int)lines) {
+				match = g_match_info_fetch_named(mi, "red");
+				palette->color_array[color_idx].red =
+						(double)g_ascii_strtoll(match, NULL, 16) / 255.0;
+				g_free(match);
+				match = g_match_info_fetch_named(mi, "green");
+				palette->color_array[color_idx].green =
+						(double)g_ascii_strtoll(match, NULL, 16) / 255.0;
+				g_free(match);
+				match = g_match_info_fetch_named(mi, "blue");
+				palette->color_array[color_idx].blue =
+						(double)g_ascii_strtoll(match, NULL, 16) / 255.0;
+				g_free(match);
+
+				/* Only RGB supported so far. Fix alpha channel to 1.0 */
+				palette->color_array[color_idx].alpha = 1.0;
+
+				color_idx++;
+			}
+
+			g_match_info_free(mi);
+
+			/* End of string */
+			if (char_array[idx] == '\0')
+				break;
+
+			line_idx = 0;
+			continue;
+		}
+
+		/* increment line index. If end is reached write all bytes  to the line end.
+		 * Line is longer than required for parsing. This ensures, that everything works as expected
+		 */
+		line_idx += ((unsigned int)line_idx < sizeof(line)-1 ? 1 : 0);
+	}
+
+	/* Data read; Shrink array in case of invalid lines */
+	palette->color_array = realloc(palette->color_array, (size_t)color_idx * sizeof(GdkRGBA));
+	palette->color_array_length = color_idx;
+
+	g_regex_unref(regex);
+ret_unref_data:
+	g_bytes_unref(data);
+
+	return 0;
+}
+
+ColorPalette *color_palette_new_from_resource(char *resource_name)
+{
+	ColorPalette *palette;
+
+	palette = GDS_RENDER_COLOR_PALETTE(g_object_new(TYPE_GDS_RENDER_COLOR_PALETTE, NULL));
+	if (palette)
+		(void)color_palette_fill_with_resource(palette, resource_name);
+
+	return palette;
+}
+
+GdkRGBA *color_palette_get_color(ColorPalette *palette, GdkRGBA *color, unsigned int index)
+{
+	GdkRGBA *c = NULL;
+
+	if (!palette)
+		goto ret_c;
+
+	if (index >= palette->color_array_length)
+		goto ret_c;
+
+	if (color)
+		c = color;
+	else
+		c = (GdkRGBA *)malloc(sizeof(GdkRGBA));
+
+	/* Copy color */
+	c->red = palette->color_array[index].red;
+	c->green = palette->color_array[index].green;
+	c->blue = palette->color_array[index].blue;
+	c->alpha = palette->color_array[index].alpha;
+ret_c:
+	return c;
+}
+
+unsigned int color_palette_get_color_count(ColorPalette *palette)
+{
+	unsigned int return_val = 0;
+
+	if (palette)
+		return_val = palette->color_array_length;
+
+	return return_val;
+}
+
+static void color_palette_dispose(GObject *gobj)
+{
+	ColorPalette *palette;
+
+	palette = GDS_RENDER_COLOR_PALETTE(gobj);
+	if (palette->color_array) {
+		palette->color_array_length = 0;
+		free(palette->color_array);
+	}
+
+	/* Chain up to parent class */
+	G_OBJECT_CLASS(color_palette_parent_class)->dispose(gobj);
+}
+
+static void color_palette_class_init(ColorPaletteClass *klass)
+{
+	GObjectClass *gclass;
+
+	gclass = G_OBJECT_CLASS(klass);
+	gclass->dispose = color_palette_dispose;
+}
+
+static void color_palette_init(ColorPalette *self)
+{
+	self->color_array = NULL;
+	self->color_array_length = 0;
+}

layer/layer-selector.c

@@ -0,0 +1,901 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file layer-selector.c
+ * @brief Implementation of the layer selector
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup layer-selector
+ * @{
+ */
+
+#include <glib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <gds-render/layer/layer-selector.h>
+#include <gds-render/gds-utils/gds-parser.h>
+#include <gds-render/widgets/layer-element.h>
+
+struct _LayerSelector {
+	/* Parent */
+	GObject parent;
+	/* Own fields */
+	GtkWidget *associated_load_button;
+	GtkWidget *associated_save_button;
+	GtkWindow *load_parent_window;
+	GtkWindow *save_parent_window;
+	GtkListBox *list_box;
+
+	GtkTargetEntry dnd_target;
+
+	gpointer dummy[4];
+};
+
+G_DEFINE_TYPE(LayerSelector, layer_selector, G_TYPE_OBJECT)
+
+/*
+ * Drag and drop code
+ * Original code from https://blog.gtk.org/2017/06/01/drag-and-drop-in-lists-revisited/
+ */
+
+static void sel_layer_element_drag_begin(GtkWidget *widget, GdkDragContext *context, gpointer data)
+{
+	GtkWidget *row;
+	GtkAllocation alloc;
+	cairo_surface_t *surface;
+	cairo_t *cr;
+	int x, y;
+	(void)data;
+
+	row = gtk_widget_get_ancestor(widget, GTK_TYPE_LIST_BOX_ROW);
+	gtk_widget_get_allocation(row, &alloc);
+	surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, alloc.width, alloc.height);
+	cr = cairo_create(surface);
+
+	gtk_style_context_add_class(gtk_widget_get_style_context(row), "drag-icon");
+	gtk_widget_draw(row, cr);
+	gtk_style_context_remove_class(gtk_widget_get_style_context(row), "drag-icon");
+
+	gtk_widget_translate_coordinates(widget, row, 0, 0, &x, &y);
+	cairo_surface_set_device_offset(surface, -x, -y);
+	gtk_drag_set_icon_surface(context, surface);
+
+	cairo_destroy(cr);
+	cairo_surface_destroy(surface);
+
+	g_object_set_data(G_OBJECT(gtk_widget_get_parent(row)), "drag-row", row);
+	gtk_style_context_add_class(gtk_widget_get_style_context(row), "drag-row");
+}
+
+static void sel_layer_element_drag_end(GtkWidget *widget, GdkDragContext *context, gpointer data)
+{
+	GtkWidget *row;
+	(void)context;
+	(void)data;
+
+	row = gtk_widget_get_ancestor(widget, GTK_TYPE_LIST_BOX_ROW);
+	g_object_set_data(G_OBJECT(gtk_widget_get_parent(row)), "drag-row", NULL);
+	gtk_style_context_remove_class(gtk_widget_get_style_context(row), "drag-row");
+	gtk_style_context_remove_class(gtk_widget_get_style_context(row), "drag-hover");
+}
+
+static void sel_layer_element_drag_data_get(GtkWidget *widget, GdkDragContext *context,
+					    GtkSelectionData *selection_data,
+					    guint info, guint time, gpointer data)
+{
+	(void)context;
+	(void)info;
+	(void)time;
+	(void)data;
+	GdkAtom atom;
+
+	atom = gdk_atom_intern_static_string("GTK_LIST_BOX_ROW");
+
+	gtk_selection_data_set(selection_data, atom,
+			       32, (const guchar *)&widget, sizeof(gpointer));
+}
+
+static GtkListBoxRow *layer_selector_get_last_row(GtkListBox *list)
+{
+	int i;
+	GtkListBoxRow *row;
+	GtkListBoxRow *tmp;
+
+	row = NULL;
+	for (i = 0; ; i++) {
+		tmp = gtk_list_box_get_row_at_index(list, i);
+		if (tmp == NULL)
+			break;
+		row = tmp;
+	}
+
+	return row;
+}
+
+static GtkListBoxRow *layer_selector_get_row_before(GtkListBox *list, GtkListBoxRow *row)
+{
+	int pos;
+
+	pos = gtk_list_box_row_get_index(row);
+	return gtk_list_box_get_row_at_index(list, pos - 1);
+}
+
+static GtkListBoxRow *layer_selector_get_row_after(GtkListBox *list, GtkListBoxRow *row)
+{
+	int pos;
+
+	pos = gtk_list_box_row_get_index(row);
+	return gtk_list_box_get_row_at_index(list, pos + 1);
+}
+
+static void layer_selector_drag_data_received(GtkWidget *widget, GdkDragContext *context, gint x, gint y,
+					     GtkSelectionData *selection_data, guint info, guint32 time,
+					     gpointer data)
+{
+	GtkWidget *row_before, *row_after;
+	GtkWidget *row;
+	GtkWidget *source;
+	int pos;
+
+	/* Handle unused parameters */
+	(void)context;
+	(void)x;
+	(void)y;
+	(void)info;
+	(void)time;
+	(void)data;
+
+	row_before = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-before"));
+	row_after = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-after"));
+
+	g_object_set_data(G_OBJECT(widget), "row-before", NULL);
+	g_object_set_data(G_OBJECT(widget), "row-after", NULL);
+
+	if (row_before)
+		gtk_style_context_remove_class(gtk_widget_get_style_context(row_before), "drag-hover-bottom");
+	if (row_after)
+		gtk_style_context_remove_class(gtk_widget_get_style_context(row_after), "drag-hover-top");
+
+	row = (gpointer) *((gpointer *)gtk_selection_data_get_data(selection_data));
+	source = gtk_widget_get_ancestor(row, GTK_TYPE_LIST_BOX_ROW);
+
+	if (source == row_after)
+		return;
+
+	g_object_ref(source);
+	gtk_container_remove(GTK_CONTAINER(gtk_widget_get_parent(source)), source);
+
+	if (row_after)
+		pos = gtk_list_box_row_get_index(GTK_LIST_BOX_ROW(row_after));
+	else
+		pos = gtk_list_box_row_get_index(GTK_LIST_BOX_ROW(row_before)) + 1;
+
+	gtk_list_box_insert(GTK_LIST_BOX(widget), source, pos);
+	g_object_unref(source);
+}
+
+static gboolean layer_selector_drag_motion(GtkWidget *widget, GdkDragContext *context, int x, int y, guint time)
+{
+	GtkAllocation alloc;
+	GtkWidget *row;
+	int hover_row_y;
+	int hover_row_height;
+	GtkWidget *drag_row;
+	GtkWidget *row_before;
+	GtkWidget *row_after;
+	(void)context;
+	(void)x;
+	(void)y;
+	(void)time;
+
+	row = GTK_WIDGET(gtk_list_box_get_row_at_y(GTK_LIST_BOX(widget), y));
+
+	drag_row = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "drag-row"));
+	row_after = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-after"));
+	row_before = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-before"));
+
+	gtk_style_context_remove_class(gtk_widget_get_style_context(drag_row), "drag-hover");
+	if (row_before)
+		gtk_style_context_remove_class(gtk_widget_get_style_context(row_before), "drag-hover-bottom");
+	if (row_after)
+		gtk_style_context_remove_class(gtk_widget_get_style_context(row_after), "drag-hover-top");
+
+	if (row) {
+		gtk_widget_get_allocation(row, &alloc);
+		hover_row_y = alloc.y;
+		hover_row_height = alloc.height;
+
+		if (y < hover_row_y + hover_row_height/2) {
+			row_after = row;
+			row_before = GTK_WIDGET(layer_selector_get_row_before(GTK_LIST_BOX(widget),
+									      GTK_LIST_BOX_ROW(row)));
+		} else {
+			row_before = row;
+			row_after = GTK_WIDGET(layer_selector_get_row_after(GTK_LIST_BOX(widget),
+									    GTK_LIST_BOX_ROW(row)));
+		}
+	} else {
+		row_before = GTK_WIDGET(layer_selector_get_last_row(GTK_LIST_BOX(widget)));
+		row_after = NULL;
+	}
+
+	g_object_set_data(G_OBJECT(widget), "row-before", row_before);
+	g_object_set_data(G_OBJECT(widget), "row-after", row_after);
+
+	if (drag_row == row_before || drag_row == row_after) {
+		gtk_style_context_add_class(gtk_widget_get_style_context(drag_row), "drag-hover");
+		return FALSE;
+	}
+
+	if (row_before)
+		gtk_style_context_add_class(gtk_widget_get_style_context(row_before), "drag-hover-bottom");
+	if (row_after)
+		gtk_style_context_add_class(gtk_widget_get_style_context(row_after), "drag-hover-top");
+
+	return TRUE;
+}
+
+static void layer_selector_drag_leave(GtkWidget *widget, GdkDragContext *context, guint time)
+{
+	GtkWidget *drag_row;
+	GtkWidget *row_before;
+	GtkWidget *row_after;
+	(void)context;
+	(void)time;
+
+	drag_row = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "drag-row"));
+	row_before = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-before"));
+	row_after = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-after"));
+
+	gtk_style_context_remove_class(gtk_widget_get_style_context(drag_row), "drag-hover");
+	if (row_before)
+		gtk_style_context_remove_class(gtk_widget_get_style_context(row_before), "drag-hover-bottom");
+	if (row_after)
+		gtk_style_context_remove_class(gtk_widget_get_style_context(row_after), "drag-hover-top");
+
+}
+
+static const char *dnd_additional_css =
+	".row:not(:first-child) { "
+	"  border-top: 1px solid alpha(gray,0.5); "
+	"  border-bottom: 1px solid transparent; "
+	"}"
+	".row:first-child { "
+	"  border-top: 1px solid transparent; "
+	"  border-bottom: 1px solid transparent; "
+	"}"
+	".row:last-child { "
+	"  border-top: 1px solid alpha(gray,0.5); "
+	"  border-bottom: 1px solid alpha(gray,0.5); "
+	"}"
+	".row.drag-icon { "
+	"  background: #282828; "
+	"  border: 1px solid blue; "
+	"}"
+	".row.drag-row { "
+	"  color: gray; "
+	"  background: alpha(gray,0.2); "
+	"}"
+	".row.drag-row.drag-hover { "
+	"  border-top: 1px solid #4e9a06; "
+	"  border-bottom: 1px solid #4e9a06; "
+	"}"
+	".row.drag-hover image, "
+	".row.drag-hover label { "
+	"  color: #4e9a06; "
+	"}"
+	".row.drag-hover-top {"
+	"  border-top: 1px solid #4e9a06; "
+	"}"
+	".row.drag-hover-bottom {"
+	"  border-bottom: 1px solid #4e9a06; "
+	"}";
+
+static void layer_selector_dispose(GObject *self)
+{
+	LayerSelector *sel = LAYER_SELECTOR(self);
+
+	g_clear_object(&sel->list_box);
+	g_clear_object(&sel->load_parent_window);
+	g_clear_object(&sel->save_parent_window);
+	g_clear_object(&sel->associated_load_button);
+	g_clear_object(&sel->associated_save_button);
+
+	if (sel->dnd_target.target) {
+		g_free(sel->dnd_target.target);
+		sel->dnd_target.target = NULL;
+	}
+
+	/* Chain up to parent's dispose function */
+	G_OBJECT_CLASS(layer_selector_parent_class)->dispose(self);
+}
+
+static void layer_selector_class_init(LayerSelectorClass *klass)
+{
+	GObjectClass *object_class = G_OBJECT_CLASS(klass);
+	GtkCssProvider *provider;
+
+	/* Implement handles to virtual functions */
+	object_class->dispose = layer_selector_dispose;
+
+	/* Setup the CSS provider for the drag and drop animations once */
+	provider = gtk_css_provider_new();
+	gtk_css_provider_load_from_data(provider, dnd_additional_css, -1, NULL);
+	gtk_style_context_add_provider_for_screen(gdk_screen_get_default(), GTK_STYLE_PROVIDER(provider), 800);
+
+	g_object_unref(provider);
+}
+
+static void layer_selector_setup_dnd(LayerSelector *self)
+{
+	gtk_drag_dest_set(GTK_WIDGET(self->list_box), GTK_DEST_DEFAULT_MOTION | GTK_DEST_DEFAULT_DROP,
+			  &self->dnd_target, 1, GDK_ACTION_MOVE);
+	g_signal_connect(self->list_box, "drag-data-received", G_CALLBACK(layer_selector_drag_data_received), NULL);
+	g_signal_connect(self->list_box, "drag-motion", G_CALLBACK(layer_selector_drag_motion), NULL);
+	g_signal_connect(self->list_box, "drag-leave", G_CALLBACK(layer_selector_drag_leave), NULL);
+}
+
+/* Drag and drop end */
+
+static void layer_selector_init(LayerSelector *self)
+{
+	self->load_parent_window = NULL;
+	self->save_parent_window = NULL;
+	self->associated_load_button = NULL;
+	self->associated_save_button = NULL;
+
+	self->dnd_target.target = g_strdup_printf("LAYER_SELECTOR_DND_%p", self);
+	self->dnd_target.info = 0;
+	self->dnd_target.flags = GTK_TARGET_SAME_APP;
+}
+
+LayerSelector *layer_selector_new(GtkListBox *list_box)
+{
+	LayerSelector *selector;
+
+	if (GTK_IS_LIST_BOX(list_box) == FALSE)
+		return NULL;
+
+	selector = LAYER_SELECTOR(g_object_new(TYPE_LAYER_SELECTOR, NULL));
+	selector->list_box = list_box;
+	layer_selector_setup_dnd(selector);
+	g_object_ref(G_OBJECT(list_box));
+
+	return selector;
+}
+
+LayerSettings *layer_selector_export_rendered_layer_info(LayerSelector *selector)
+{
+	LayerSettings *layer_settings;
+	struct layer_info linfo;
+	GList *row_list;
+	GList *iterator;
+	LayerElement *le;
+	int i;
+
+	layer_settings = layer_settings_new();
+	if (!layer_settings)
+		return NULL;
+
+	row_list = gtk_container_get_children(GTK_CONTAINER(selector->list_box));
+
+	for (i = 0, iterator = row_list; iterator != NULL; iterator = g_list_next(iterator), i++) {
+		le = LAYER_ELEMENT(iterator->data);
+
+		/* Get name from layer element. This must not be freed */
+		linfo.name = (char *)layer_element_get_name(le);
+
+		layer_element_get_color(le, &linfo.color);
+		linfo.render = (layer_element_get_export(le) ? 1 : 0);
+		linfo.stacked_position = i;
+		linfo.layer = layer_element_get_layer(le);
+
+		/* This function copies the entire layer info struct including the name string.
+		 * Therefore, using the same layer_info struct over and over is safe.
+		 */
+		layer_settings_append_layer_info(layer_settings, &linfo);
+	}
+
+	return layer_settings;
+}
+
+static void layer_selector_clear_widgets(LayerSelector *self)
+{
+	GList *list;
+	GList *temp;
+
+	list = gtk_container_get_children(GTK_CONTAINER(self->list_box));
+	for (temp = list; temp != NULL; temp = temp->next)
+		gtk_container_remove(GTK_CONTAINER(self->list_box), GTK_WIDGET(temp->data));
+
+	/* Widgets are already destroyed when removed from box because they are only referenced inside the container */
+
+	g_list_free(list);
+
+	/* Deactivate buttons */
+	if (self->associated_load_button)
+		gtk_widget_set_sensitive(self->associated_load_button, FALSE);
+	if (self->associated_save_button)
+		gtk_widget_set_sensitive(self->associated_save_button, FALSE);
+}
+
+/**
+ * @brief Check if a specific layer element with the given layer number is present in the layer selector
+ * @param self LayerSelector instance
+ * @param layer Layer number to check for
+ * @return TRUE if layer is present, else FALSE
+ */
+static gboolean layer_selector_check_if_layer_widget_exists(LayerSelector *self, int layer)
+{
+	GList *list;
+	GList *temp;
+	LayerElement *widget;
+	gboolean ret = FALSE;
+
+	list = gtk_container_get_children(GTK_CONTAINER(self->list_box));
+
+	for (temp = list; temp != NULL; temp = temp->next) {
+		widget = LAYER_ELEMENT(temp->data);
+		if (layer_element_get_layer(widget) == layer) {
+			ret = TRUE;
+			break;
+		}
+	}
+
+	g_list_free(list);
+
+	return ret;
+}
+
+/**
+ * @brief Setup the necessary drag and drop callbacks of layer elements.
+ * @param self LayerSelector instance. Used to get the DnD target entry.
+ * @param element LayerElement instance to set the callbacks
+ */
+static void sel_layer_element_setup_dnd_callbacks(LayerSelector *self, LayerElement *element)
+{
+	struct layer_element_dnd_data dnd_data;
+
+	if (!self || !element)
+		return;
+
+	dnd_data.entries = &self->dnd_target;
+	dnd_data.entry_count = 1;
+	dnd_data.drag_end = sel_layer_element_drag_end;
+	dnd_data.drag_begin = sel_layer_element_drag_begin;
+	dnd_data.drag_data_get = sel_layer_element_drag_data_get;
+
+	layer_element_set_dnd_callbacks(element, &dnd_data);
+}
+
+/**
+ * @brief Analyze \p cell layers and append detected layers to layer selector \p self
+ * @param self LayerSelector instance
+ * @param cell Cell to analyze
+ */
+static void layer_selector_analyze_cell_layers(LayerSelector *self, struct gds_cell *cell)
+{
+	GList *graphics;
+	struct gds_graphics *gfx;
+	int layer;
+	GtkWidget *le;
+
+	for (graphics = cell->graphic_objs; graphics != NULL; graphics = graphics->next) {
+		gfx = (struct gds_graphics *)graphics->data;
+		layer = (int)gfx->layer;
+		if (layer_selector_check_if_layer_widget_exists(self, layer) == FALSE) {
+			le = layer_element_new();
+			sel_layer_element_setup_dnd_callbacks(self, LAYER_ELEMENT(le));
+			layer_element_set_layer(LAYER_ELEMENT(le), layer);
+			gtk_list_box_insert(self->list_box, le, -1);
+			gtk_widget_show(le);
+		}
+	}
+}
+
+/**
+ * @brief sort_func Sort callback for list box
+ * @param row1
+ * @param row2
+ * @param unused
+ * @note Do not use this function. This is an internal callback
+ * @return See sort function documentation of GTK+
+ */
+static gint layer_selector_sort_func(GtkListBoxRow *row1, GtkListBoxRow *row2, gpointer unused)
+{
+	LayerElement *le1, *le2;
+	gint ret;
+	static const enum layer_selector_sort_algo default_sort = LAYER_SELECTOR_SORT_DOWN;
+	const enum layer_selector_sort_algo *algo = (const enum layer_selector_sort_algo *)unused;
+
+	/* Assume downward sorting */
+	/* TODO: This is nasty. Find a better way */
+	if (!algo)
+		algo = &default_sort;
+
+	le1 = LAYER_ELEMENT(row1);
+	le2 = LAYER_ELEMENT(row2);
+
+	/* Determine sort fow downward sort */
+	ret = layer_element_get_layer(le1) - layer_element_get_layer(le2);
+
+	/* Change order if upward sort is requested */
+	ret *= (*algo == LAYER_SELECTOR_SORT_DOWN ? 1 : -1);
+
+	return ret;
+}
+
+void layer_selector_generate_layer_widgets(LayerSelector *selector, GList *libs)
+{
+	GList *cell_list = NULL;
+	struct gds_library *lib;
+
+	layer_selector_clear_widgets(selector);
+
+	for (; libs != NULL; libs = libs->next) {
+		lib = (struct gds_library *)libs->data;
+		for (cell_list = lib->cells; cell_list != NULL; cell_list = cell_list->next)
+			layer_selector_analyze_cell_layers(selector, (struct gds_cell *)cell_list->data);
+	} /* For libs */
+
+	/* Sort the layers */
+	layer_selector_force_sort(selector, LAYER_SELECTOR_SORT_DOWN);
+
+	/* Activate Buttons */
+	if (selector->associated_load_button)
+		gtk_widget_set_sensitive(selector->associated_load_button, TRUE);
+	if (selector->associated_save_button)
+		gtk_widget_set_sensitive(selector->associated_save_button, TRUE);
+}
+
+/**
+ * @brief Find LayerElement in list with specified layer number
+ * @param el_list List with elements of type LayerElement
+ * @param layer Layer number
+ * @return Found LayerElement. If nothing is found, NULL.
+ */
+static LayerElement *layer_selector_find_layer_element_in_list(GList *el_list, int layer)
+{
+	LayerElement *ret = NULL;
+
+	for (; el_list != NULL; el_list = el_list->next) {
+		if (layer_element_get_layer(LAYER_ELEMENT(el_list->data)) == layer) {
+			ret = LAYER_ELEMENT(el_list->data);
+			break;
+		}
+	}
+	return ret;
+}
+
+/**
+ * @brief Load the layer mapping from a CSV formatted file
+ *
+ * This function imports the layer specification from a file (see @ref lmf-spec).
+ * The layer ordering defined in the file is kept. All layers present in the
+ * current loaded library, which are not present in the layer mapping file
+ * are appended at the end of the layer selector list.
+ *
+ * @param self LayerSelector instance
+ * @param file_name File name to load from
+ */
+static void layer_selector_load_layer_mapping_from_file(LayerSelector *self, const gchar *file_name)
+{
+	GFile *file;
+	GFileInputStream *stream;
+	GDataInputStream *dstream;
+	LayerElement *le;
+	GList *rows;
+	GList *temp;
+	GList *layer_infos;
+	int status;
+	LayerSettings *layer_settings;
+	struct layer_info *linfo;
+
+	file = g_file_new_for_path(file_name);
+	stream = g_file_read(file, NULL, NULL);
+
+	if (!stream)
+		goto destroy_file;
+
+	dstream = g_data_input_stream_new(G_INPUT_STREAM(stream));
+
+	rows = gtk_container_get_children(GTK_CONTAINER(self->list_box));
+
+	/* Reference and remove all rows from box */
+	for (temp = rows; temp != NULL; temp = temp->next) {
+		le = LAYER_ELEMENT(temp->data);
+		/* Referencing protects the widget from being deleted when removed */
+		g_object_ref(G_OBJECT(le));
+		gtk_container_remove(GTK_CONTAINER(self->list_box), GTK_WIDGET(le));
+	}
+
+	/* Load Layer settings. No need to check pointer, will be checked by load csv func. */
+	layer_settings = layer_settings_new();
+
+	status = layer_settings_load_from_csv(layer_settings, file_name);
+	if (status)
+		goto abort_layer_settings;
+
+	layer_infos = layer_settings_get_layer_info_list(layer_settings);
+	if (!layer_infos)
+		goto abort_layer_settings;
+
+	/* Loop over all layer infos read from the CSV file */
+	for (; layer_infos; layer_infos = g_list_next(layer_infos)) {
+		linfo = (struct layer_info *)layer_infos->data;
+		le = layer_selector_find_layer_element_in_list(rows, linfo->layer);
+		if (!le)
+			continue;
+
+		layer_element_set_name(le, linfo->name);
+		layer_element_set_export(le, (linfo->render ? TRUE : FALSE));
+		layer_element_set_color(le, &linfo->color);
+		gtk_container_add(GTK_CONTAINER(self->list_box), GTK_WIDGET(le));
+		rows = g_list_remove(rows, le);
+	}
+
+abort_layer_settings:
+	/* Destroy layer settings. Not needed for adding remaining elements */
+	g_object_unref(layer_settings);
+
+	/* Add remaining elements */
+	for (temp = rows; temp != NULL; temp = temp->next) {
+		le = LAYER_ELEMENT(temp->data);
+		/* Referencing protets the widget from being deleted when removed */
+		gtk_list_box_insert(self->list_box, GTK_WIDGET(le), -1);
+		g_object_unref(G_OBJECT(le));
+	}
+
+	/* Delete list */
+	g_list_free(rows);
+
+	/* read line */
+	g_object_unref(dstream);
+	g_object_unref(stream);
+destroy_file:
+	g_object_unref(file);
+}
+
+/**
+ * @brief Callback for Load Mapping Button
+ * @param button
+ * @param user_data
+ */
+static void layer_selector_load_mapping_clicked(GtkWidget *button, gpointer user_data)
+{
+	LayerSelector *sel;
+	GtkWidget *dialog;
+	gint res;
+	gchar *file_name;
+	(void)button;
+
+	sel = LAYER_SELECTOR(user_data);
+
+	dialog = gtk_file_chooser_dialog_new("Load Mapping File", GTK_WINDOW(sel->load_parent_window),
+					     GTK_FILE_CHOOSER_ACTION_OPEN,
+					     "Cancel", GTK_RESPONSE_CANCEL, "Load Mapping", GTK_RESPONSE_ACCEPT, NULL);
+	res = gtk_dialog_run(GTK_DIALOG(dialog));
+	if (res == GTK_RESPONSE_ACCEPT) {
+		file_name = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
+		layer_selector_load_layer_mapping_from_file(sel, file_name);
+		g_free(file_name);
+	}
+	gtk_widget_destroy(dialog);
+}
+
+
+
+/**
+ * @brief Save layer mapping of selector \p self to a file
+ * @param self LayerSelector instance
+ * @param file_name File name to save to
+ */
+static void layer_selector_save_layer_mapping_data(LayerSelector *self, const gchar *file_name)
+{
+	LayerSettings *layer_settings;
+
+	g_return_if_fail(LAYER_IS_SELECTOR(self));
+	g_return_if_fail(file_name);
+
+	/* Get layer settings. No need to check return value. to_csv func is safe */
+	layer_settings = layer_selector_export_rendered_layer_info(self);
+	(void)layer_settings_to_csv(layer_settings, file_name);
+}
+
+/**
+ * @brief Callback for Save Layer Mapping Button
+ * @param button
+ * @param user_data
+ */
+static void layer_selector_save_mapping_clicked(GtkWidget *button, gpointer user_data)
+{
+	GtkWidget *dialog;
+	gint res;
+	gchar *file_name;
+	LayerSelector *sel;
+	(void)button;
+
+	sel = LAYER_SELECTOR(user_data);
+
+	dialog = gtk_file_chooser_dialog_new("Save Mapping File", GTK_WINDOW(sel->save_parent_window),
+					     GTK_FILE_CHOOSER_ACTION_SAVE,
+					     "Cancel", GTK_RESPONSE_CANCEL, "Save Mapping", GTK_RESPONSE_ACCEPT, NULL);
+	gtk_file_chooser_set_do_overwrite_confirmation(GTK_FILE_CHOOSER(dialog), TRUE);
+
+	res = gtk_dialog_run(GTK_DIALOG(dialog));
+	if (res == GTK_RESPONSE_ACCEPT) {
+		file_name = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
+		layer_selector_save_layer_mapping_data(sel, file_name);
+		g_free(file_name);
+	}
+	gtk_widget_destroy(dialog);
+}
+
+void layer_selector_set_load_mapping_button(LayerSelector *selector, GtkWidget *button, GtkWindow *main_window)
+{
+	g_clear_object(&selector->load_parent_window);
+	g_clear_object(&selector->associated_load_button);
+
+	g_object_ref(G_OBJECT(button));
+	g_object_ref(G_OBJECT(main_window));
+	selector->associated_load_button = button;
+	selector->load_parent_window = main_window;
+	g_signal_connect(button, "clicked", G_CALLBACK(layer_selector_load_mapping_clicked), selector);
+}
+
+void layer_selector_set_save_mapping_button(LayerSelector *selector, GtkWidget *button,  GtkWindow *main_window)
+{
+	g_clear_object(&selector->save_parent_window);
+	g_clear_object(&selector->associated_save_button);
+
+	g_object_ref(G_OBJECT(button));
+	g_object_ref(G_OBJECT(main_window));
+	selector->associated_save_button = button;
+	selector->save_parent_window = main_window;
+	g_signal_connect(button, "clicked", G_CALLBACK(layer_selector_save_mapping_clicked), selector);
+}
+
+void layer_selector_force_sort(LayerSelector *selector, enum layer_selector_sort_algo sort_function)
+{
+	GtkListBox *box;
+
+	if (!selector)
+		return;
+
+	box = selector->list_box;
+	if (!box)
+		return;
+
+	/* Set sorting function, sort, and disable sorting function */
+	gtk_list_box_set_sort_func(box, layer_selector_sort_func, (gpointer)&sort_function, NULL);
+	gtk_list_box_invalidate_sort(box);
+	gtk_list_box_set_sort_func(box, NULL, NULL, NULL);
+}
+
+void layer_selector_select_all_layers(LayerSelector *layer_selector, gboolean select)
+{
+	GList *le_list;
+	GList *iter;
+	LayerElement *le;
+
+	g_return_if_fail(LAYER_IS_SELECTOR(layer_selector));
+	g_return_if_fail(GTK_IS_LIST_BOX(layer_selector->list_box));
+
+	le_list = gtk_container_get_children(GTK_CONTAINER(layer_selector->list_box));
+
+	for (iter = le_list; iter != NULL; iter = g_list_next(iter)) {
+		le = LAYER_ELEMENT(iter->data);
+		if (LAYER_IS_ELEMENT(le))
+			layer_element_set_export(le, select);
+	}
+
+	g_list_free(le_list);
+}
+
+void layer_selector_auto_color_layers(LayerSelector *layer_selector, ColorPalette *palette, double global_alpha)
+{
+	GList *le_list;
+	GList *le_list_ptr;
+	LayerElement *le;
+	unsigned int color_index = 0;
+	unsigned int color_count;
+	GdkRGBA color;
+
+	if (GDS_RENDER_IS_COLOR_PALETTE(palette) == FALSE || LAYER_IS_SELECTOR(layer_selector) == FALSE)
+		return;
+	if (global_alpha <= 0)
+		return;
+	if (GTK_IS_LIST_BOX(layer_selector->list_box) == FALSE)
+		return;
+
+	le_list = gtk_container_get_children(GTK_CONTAINER(layer_selector->list_box));
+
+	/* iterate over layer elements and fill colors */
+	color_index = 0;
+	color_count = color_palette_get_color_count(palette);
+	if (color_count == 0)
+		goto ret_free_le_list;
+
+	for (le_list_ptr = le_list; le_list_ptr != NULL; le_list_ptr = le_list_ptr->next) {
+		le = LAYER_ELEMENT(le_list_ptr->data);
+		if (le) {
+			color_palette_get_color(palette, &color, color_index++);
+			color.alpha *= global_alpha;
+			layer_element_set_color(le, &color);
+
+			if (color_index >= color_count)
+				color_index = 0;
+		}
+	}
+
+ret_free_le_list:
+	g_list_free(le_list);
+}
+
+void layer_selector_auto_name_layers(LayerSelector *layer_selector, gboolean overwrite)
+{
+	GList *le_list;
+	GList *le_list_ptr;
+	LayerElement *le;
+	const char *old_layer_name;
+	GString *new_layer_name;
+
+	g_return_if_fail(LAYER_IS_SELECTOR(layer_selector));
+
+	new_layer_name = g_string_new_len(NULL, 10);
+	le_list = gtk_container_get_children(GTK_CONTAINER(layer_selector->list_box));
+
+	for (le_list_ptr = le_list; le_list_ptr != NULL; le_list_ptr = g_list_next(le_list_ptr)) {
+		le = LAYER_ELEMENT(le_list_ptr->data);
+		if (!le)
+			continue;
+		old_layer_name = layer_element_get_name(le);
+
+		/* Check if layer name is empty or may be overwritten */
+		if (!old_layer_name || *old_layer_name == '\0' || overwrite) {
+			g_string_printf(new_layer_name, "Layer %d", layer_element_get_layer(le));
+			layer_element_set_name(le, new_layer_name->str);
+		}
+	}
+
+	g_string_free(new_layer_name, TRUE);
+	g_list_free(le_list);
+}
+
+gboolean layer_selector_contains_elements(LayerSelector *layer_selector)
+{
+	GList *layer_element_list;
+
+	/* Check objects */
+	g_return_val_if_fail(LAYER_IS_SELECTOR(layer_selector), FALSE);
+	g_return_val_if_fail(GTK_IS_LIST_BOX(layer_selector->list_box), FALSE);
+
+	/* Get a list of the child elements inside the list boy associated with this selector */
+	layer_element_list = gtk_container_get_children(GTK_CONTAINER(layer_selector->list_box));
+
+	/* Return TRUE if there is an element in the list, else return FALSE */
+	return (layer_element_list ? TRUE : FALSE);
+}
+
+/** @} */

layer/layer-settings.c

@@ -0,0 +1,354 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file layer-settings.c
+ * @brief Implementation of the LayerSettings class
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#include <gds-render/layer/layer-settings.h>
+#include <stdlib.h>
+
+struct _LayerSettings {
+	GObject parent;
+	GList *layer_infos;
+	gpointer padding[12];
+};
+
+G_DEFINE_TYPE(LayerSettings, layer_settings, G_TYPE_OBJECT)
+
+static void layer_settings_init(LayerSettings *self)
+{
+	self->layer_infos = NULL;
+}
+
+static void layer_info_delete_with_name(struct layer_info *const info)
+{
+	if (!info)
+		return;
+
+	if (info->name)
+		free(info->name);
+	free(info);
+}
+
+static void layer_settings_dispose(GObject *obj)
+{
+	LayerSettings *self;
+
+	self = GDS_RENDER_LAYER_SETTINGS(obj);
+
+	if (self->layer_infos) {
+		g_list_free_full(self->layer_infos, (GDestroyNotify)layer_info_delete_with_name);
+		self->layer_infos = NULL;
+	}
+
+	G_OBJECT_CLASS(layer_settings_parent_class)->dispose(obj);
+}
+
+static void layer_settings_class_init(LayerSettingsClass *klass)
+{
+	GObjectClass *oclass;
+
+	oclass = G_OBJECT_CLASS(klass);
+	oclass->dispose = layer_settings_dispose;
+
+	return;
+}
+
+/**
+ * @brief Copy layer_info struct
+ *
+ * This function copies a layer info struct.
+ *
+ * @note Be aware, that it does not only copy the pointer to the
+ *       layer name, but instead duplicates the string.
+ * @param info Info to copy
+ * @return new layer_info struct
+ */
+static struct layer_info *layer_info_copy(const struct layer_info * const info)
+{
+	struct layer_info *copy;
+
+	if (!info)
+		return 0;
+
+	copy = (struct layer_info *)malloc(sizeof(struct layer_info));
+	if (!copy)
+		return 0;
+
+	/* Copy data */
+	memcpy(copy, info, sizeof(struct layer_info));
+	/* Duplicate string */
+	if (info->name)
+		copy->name = strdup(info->name);
+
+	return copy;
+}
+
+LayerSettings *layer_settings_new()
+{
+	return g_object_new(GDS_RENDER_TYPE_LAYER_SETTINGS, NULL);
+}
+
+int layer_settings_append_layer_info(LayerSettings *settings, struct layer_info *info)
+{
+	struct layer_info *info_copy;
+
+	g_return_val_if_fail(GDS_RENDER_IS_LAYER_SETTINGS(settings), -1);
+	if (!info)
+		return -2;
+
+	/* Copy layer info */
+	info_copy = layer_info_copy(info);
+
+	/* Append to list */
+	settings->layer_infos = g_list_append(settings->layer_infos, info_copy);
+
+	return (settings->layer_infos ? 0 : -3);
+}
+
+void layer_settings_clear(LayerSettings *settings)
+{
+	g_return_if_fail(GDS_RENDER_IS_LAYER_SETTINGS(settings));
+
+	/* Clear list and delete layer_info structs including the name field */
+	g_list_free_full(settings->layer_infos, (GDestroyNotify)layer_info_delete_with_name);
+	settings->layer_infos = NULL;
+}
+
+int layer_settings_remove_layer(LayerSettings *settings, int layer)
+{
+	GList *list_iter;
+	GList *found = NULL;
+	struct layer_info *inf;
+
+	g_return_val_if_fail(GDS_RENDER_IS_LAYER_SETTINGS(settings), -1);
+
+	/* Find in list */
+	for (list_iter = settings->layer_infos; list_iter; list_iter = list_iter->next) {
+		inf = (struct layer_info *)list_iter->data;
+
+		if (!inf)
+			continue;
+		if (inf->layer == layer)
+			found = list_iter;
+	}
+
+	if (found)  {
+		/* Free the layer_info struct */
+		layer_info_delete_with_name((struct layer_info *)found->data);
+		/* Delete the list element */
+		settings->layer_infos = g_list_delete_link(settings->layer_infos, found);
+		return 0;
+	}
+
+	return -2;
+}
+
+GList *layer_settings_get_layer_info_list(LayerSettings *settings)
+{
+	g_return_val_if_fail(GDS_RENDER_IS_LAYER_SETTINGS(settings), NULL);
+	return settings->layer_infos;
+}
+
+/**
+ * @brief Generate a layer mapping CSV line for a given layer_info struct
+ * @param string Buffer to write to
+ * @param linfo Layer information
+ */
+static void layer_settings_gen_csv_line(GString *string, struct layer_info *linfo)
+{
+	int i;
+
+	g_string_printf(string, "%d:%lf:%lf:%lf:%lf:%d:%s\n",
+			linfo->layer, linfo->color.red, linfo->color.green,
+			linfo->color.blue, linfo->color.alpha, (linfo->render ? 1 : 0), linfo->name);
+	/* Fix broken locale settings */
+	for (i = 0; string->str[i]; i++) {
+		if (string->str[i] == ',')
+			string->str[i] = '.';
+	}
+
+	for (i = 0; string->str[i]; i++) {
+		if (string->str[i] == ':')
+			string->str[i] = ',';
+	}
+}
+
+int layer_settings_to_csv(LayerSettings *settings, const char *path)
+{
+	GFile *file;
+	GOutputStream *w_fstream;
+	GString *string;
+	GList *info_iter;
+	struct layer_info *linfo;
+	int ret = 0;
+
+	file = g_file_new_for_path(path);
+	w_fstream = G_OUTPUT_STREAM(g_file_replace(file, NULL, FALSE, G_FILE_CREATE_NONE, NULL, NULL));
+	if (!w_fstream) {
+		ret = -1;
+		goto ret_unref_file;
+	}
+
+	/* Allocate new working buffer string. A size bigger than 200 is unexpected, but possible
+	 * 200 is a tradeoff between memory usage and preventing the necessity of realloc'ing the string
+	 */
+	string = g_string_new_len(NULL, 200);
+	if (!string) {
+		ret = -2;
+		goto ret_close_file;
+	}
+
+	/* Loop over layers and write CSV lines */
+	for (info_iter = settings->layer_infos; info_iter; info_iter = info_iter->next) {
+		linfo = (struct layer_info *)info_iter->data;
+
+		layer_settings_gen_csv_line(string, linfo);
+		g_output_stream_write(w_fstream, string->str, string->len * sizeof(gchar), NULL, NULL);
+	}
+
+	/* Delete string */
+	g_string_free(string, TRUE);
+ret_close_file:
+	g_output_stream_flush(w_fstream, NULL, NULL);
+	g_output_stream_close(w_fstream, NULL, NULL);
+	g_object_unref(w_fstream);
+ret_unref_file:
+	g_object_unref(file);
+
+	return ret;
+}
+
+/**
+ * @brief Load a line from \p stream and parse try to parse it as layer information
+ * @param stream Input data stream
+ * @param linfo Layer info struct to fill
+ * @return 1 if malformatted line, 0 if parsing was successful and parameters are valid, -1 if file end
+ */
+static int layer_settings_load_csv_line_from_stream(GDataInputStream *stream, struct layer_info *linfo)
+{
+	int ret;
+	gsize len;
+	gchar *line;
+	GRegex *regex;
+	GMatchInfo *mi;
+	char *match;
+
+	if (!linfo) {
+		ret = 1;
+		goto ret_direct;
+	}
+
+	regex = g_regex_new("^(?<layer>[0-9]+),(?<r>[0-9\\.]+),(?<g>[0-9\\.]+),(?<b>[0-9\\.]+),(?<a>[0-9\\.]+),(?<export>[01]),(?<name>.*)$", 0, 0, NULL);
+
+	line = g_data_input_stream_read_line(stream, &len, NULL, NULL);
+	if (!line) {
+		ret = -1;
+		goto destroy_regex;
+	}
+
+	/* Match line in CSV */
+	g_regex_match(regex, line, 0, &mi);
+	if (g_match_info_matches(mi)) {
+		/* Line is valid */
+		match = g_match_info_fetch_named(mi, "layer");
+		linfo->layer = (int)g_ascii_strtoll(match, NULL, 10);
+		g_free(match);
+		match = g_match_info_fetch_named(mi, "r");
+		linfo->color.red = g_ascii_strtod(match, NULL);
+		g_free(match);
+		match = g_match_info_fetch_named(mi, "g");
+		linfo->color.green = g_ascii_strtod(match, NULL);
+		g_free(match);
+		match = g_match_info_fetch_named(mi, "b");
+		linfo->color.blue = g_ascii_strtod(match, NULL);
+		g_free(match);
+		match = g_match_info_fetch_named(mi, "a");
+		linfo->color.alpha = g_ascii_strtod(match, NULL);
+		g_free(match);
+		match = g_match_info_fetch_named(mi, "export");
+		linfo->render = ((!strcmp(match, "1")) ? 1 : 0);
+		g_free(match);
+		match = g_match_info_fetch_named(mi, "name");
+		linfo->name = match;
+
+		ret = 0;
+	} else {
+		/* Line is malformatted */
+		printf("Could not recognize line in CSV as valid entry: %s\n", line);
+		ret = 1;
+	}
+
+	g_match_info_free(mi);
+	g_free(line);
+destroy_regex:
+	g_regex_unref(regex);
+ret_direct:
+	return ret;
+
+}
+
+int layer_settings_load_from_csv(LayerSettings *settings, const char *path)
+{
+	GFile *file;
+	int ret = 0;
+	GInputStream *in_stream;
+	GDataInputStream *data_stream;
+	int parser_ret;
+	int stacked_pos;
+	struct layer_info linfo;
+
+	file = g_file_new_for_path(path);
+	in_stream = G_INPUT_STREAM(g_file_read(file, NULL, NULL));
+
+	g_return_val_if_fail(GDS_RENDER_IS_LAYER_SETTINGS(settings), -2);
+
+	if (!in_stream) {
+		ret = -1;
+		goto ret_destroy_file;
+	}
+	/* Delete old settings */
+	layer_settings_clear(settings);
+
+	data_stream = g_data_input_stream_new(in_stream);
+
+	stacked_pos = 0;
+	while ((parser_ret = layer_settings_load_csv_line_from_stream(data_stream, &linfo)) >= 0) {
+		/* Line broken */
+		if (parser_ret == 1)
+			continue;
+
+		linfo.stacked_position = stacked_pos++;
+
+		layer_settings_append_layer_info(settings, &linfo);
+		/* Clear name to prevent memory leak */
+		if (linfo.name)
+			g_free(linfo.name);
+	}
+
+	g_object_unref(data_stream);
+	g_object_unref(in_stream);
+ret_destroy_file:
+	g_object_unref(file);
+
+	return ret;
+}

main-window.c

@@ -1,316 +0,0 @@
-/*
- * GDSII-Converter
- * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
- *
- * This file is part of GDSII-Converter.
- *
- * GDSII-Converter is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * GDSII-Converter is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "main-window.h"
-#include <stdio.h>
-#include "gds-parser/gds-parser.h"
-#include <gtk/gtk.h>
-#include "layer-selector.h"
-#include "tree-renderer/tree-store.h"
-#include "latex-output/latex-output.h"
-#include "widgets/conv-settings-dialog.h"
-#include "cairo-output/cairo-output.h"
-
-struct open_button_data {
-	GtkWindow *main_window;
-	GList **list_ptr;
-	GtkTreeStore *cell_store;
-	GtkListBox *layer_box;
-};
-
-struct convert_button_data {
-	GtkTreeView *tree_view;
-	GtkWindow *main_window;
-};
-
-static gboolean on_window_close(gpointer window, gpointer user)
-{
-	gtk_widget_destroy(GTK_WIDGET(window));
-	return TRUE;
-}
-
-static GString *generate_string_from_date(struct gds_time_field *date)
-{
-	GString *str;
-
-	str = g_string_new_len(NULL, 50);
-	g_string_printf(str, "%02u.%02u.%u - %02u:%02u",
-			(unsigned int)date->day,
-			(unsigned int)date->month,
-			(unsigned int)date->year,
-			(unsigned int)date->hour,
-			(unsigned int)date->minute);
-	return str;
-}
-
-
-static void on_load_gds(gpointer button, gpointer user)
-{
-	GList *cell;
-	GtkTreeIter libiter;
-	GtkTreeIter celliter;
-	GList *lib;
-	struct gds_library *gds_lib;
-	struct gds_cell *gds_c;
-	struct open_button_data *ptr = (struct open_button_data *)user;
-	GtkTreeStore *store = ptr->cell_store;
-	GtkWidget *open_dialog;
-	GtkFileChooser *file_chooser;
-	GtkFileFilter *filter;
-	GtkStyleContext *button_style;
-	gint dialog_result;
-	int gds_result;
-	char *filename;
-	GString *mod_date;
-	GString *acc_date;
-
-	open_dialog = gtk_file_chooser_dialog_new("Open GDSII File", ptr->main_window, GTK_FILE_CHOOSER_ACTION_OPEN,
-						  "Cancel", GTK_RESPONSE_CANCEL, "Open GDSII", GTK_RESPONSE_ACCEPT, NULL);
-	file_chooser = GTK_FILE_CHOOSER(open_dialog);
-	/* Add GDS II Filter */
-	filter = gtk_file_filter_new();
-	gtk_file_filter_add_pattern(filter, "*.gds");
-	gtk_file_filter_set_name(filter, "GDSII-Files");
-	gtk_file_chooser_add_filter(file_chooser, filter);
-
-	dialog_result = gtk_dialog_run(GTK_DIALOG(open_dialog));
-
-	if (dialog_result == GTK_RESPONSE_ACCEPT) {
-
-		/* Get File name */
-		filename = gtk_file_chooser_get_filename(file_chooser);
-
-		gtk_tree_store_clear(store);
-		clear_lib_list(ptr->list_ptr);
-
-		/* Parse new GDSII file */
-		gds_result = parse_gds_from_file(filename, ptr->list_ptr);
-
-		/* Delete file name afterwards */
-		g_free(filename);
-		if (gds_result)
-			goto end_destroy;
-
-		/* remove suggested action from Open button */
-		button_style = gtk_widget_get_style_context(GTK_WIDGET(button));
-		gtk_style_context_remove_class(button_style, "suggested-action");
-
-		for (lib = *(ptr->list_ptr); lib != NULL; lib = lib->next) {
-			gds_lib = (struct gds_library *)lib->data;
-			/* Create top level iter */
-			gtk_tree_store_append (store, &libiter, NULL);
-
-			/* Convert dates to String */
-			mod_date = generate_string_from_date(&gds_lib->mod_time);
-			acc_date = generate_string_from_date(&gds_lib->access_time);
-
-			gtk_tree_store_set (store, &libiter,
-					    CELL_SEL_LIBRARY, gds_lib,
-					    CELL_SEL_MODDATE, mod_date->str,
-					    CELL_SEL_ACCESSDATE, acc_date->str,
-					    -1);
-
-			/* Delete GStrings including string data. */
-			/* Cell store copies String type data items */
-			g_string_free(mod_date, TRUE);
-			g_string_free(acc_date, TRUE);
-
-			for (cell = gds_lib->cells; cell != NULL; cell = cell->next) {
-				gds_c = (struct gds_cell *)cell->data;
-				gtk_tree_store_append (store, &celliter, &libiter);
-
-				/* Convert dates to String */
-				mod_date = generate_string_from_date(&gds_c->mod_time);
-				acc_date = generate_string_from_date(&gds_c->access_time);
-
-				gtk_tree_store_set (store, &celliter,
-						    CELL_SEL_CELL, gds_c,
-						    CELL_SEL_MODDATE, mod_date->str,
-						    CELL_SEL_ACCESSDATE, acc_date->str,
-						    -1);
-
-				/* Delete GStrings including string data. */
-				/* Cell store copies String type data items */
-				g_string_free(mod_date, TRUE);
-				g_string_free(acc_date, TRUE);
-			}
-		}
-
-		/* Create Layers in Layer Box */
-		generate_layer_widgets(ptr->layer_box, *(ptr->list_ptr));
-	}
-
-end_destroy:
-	/* Destroy dialog and filter */
-	gtk_widget_destroy(open_dialog);
-}
-
-static void on_convert_clicked(gpointer button, gpointer user)
-{
-	static struct render_settings sett = {
-		.scale = 1000.0f,
-				.renderer = RENDERER_LATEX_TIKZ,
-	};
-	struct convert_button_data *data = (struct convert_button_data *)user;
-	GtkTreeSelection *selection;
-	GtkTreeIter iter;
-	GtkTreeModel *model;
-	GList *layer_list;
-	struct gds_cell *cell_to_render;
-	FILE *output_file;
-	GtkWidget *dialog;
-	RendererSettingsDialog *settings;
-	GtkFileFilter *filter;
-	gint res;
-	char *file_name;
-
-	/* Get selected cell */
-	selection = gtk_tree_view_get_selection(data->tree_view);
-	if (gtk_tree_selection_get_selected(selection, &model, &iter) == FALSE)
-		return;
-
-	gtk_tree_model_get(model, &iter, CELL_SEL_CELL, &cell_to_render, -1);
-
-	if (!cell_to_render)
-		return;
-
-	/* Get layers that are rendered */
-	layer_list = export_rendered_layer_info();
-
-	settings = renderer_settings_dialog_new(GTK_WINDOW(data->main_window));
-	renderer_settings_dialog_set_settings(settings, &sett);
-	res = gtk_dialog_run(GTK_DIALOG(settings));
-	if (res == GTK_RESPONSE_OK) {
-		renderer_settings_dialog_get_settings(settings, &sett);
-		gtk_widget_destroy(GTK_WIDGET(settings));
-	} else {
-		gtk_widget_destroy(GTK_WIDGET(settings));
-		goto ret_layer_destroy;
-	}
-
-
-
-	/* save file dialog */
-	dialog = gtk_file_chooser_dialog_new((sett.renderer == RENDERER_LATEX_TIKZ
-					      ? "Save LaTeX File" : "Save PDF"),
-					     GTK_WINDOW(data->main_window), GTK_FILE_CHOOSER_ACTION_SAVE,
-					     "Cancel", GTK_RESPONSE_CANCEL, "Save", GTK_RESPONSE_ACCEPT, NULL);
-	/* Set file filter according to settings */
-	filter = gtk_file_filter_new();
-	if (sett.renderer == RENDERER_LATEX_TIKZ) {
-		gtk_file_filter_add_pattern(filter, "*.tex");
-		gtk_file_filter_set_name(filter, "LaTeX-Files");
-	} else {
-		gtk_file_filter_add_pattern(filter, "*.pdf");
-		gtk_file_filter_set_name(filter, "PDF-Files");
-	}
-	gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), filter);
-
-	res = gtk_dialog_run(GTK_DIALOG(dialog));
-	if (res == GTK_RESPONSE_ACCEPT) {
-		file_name = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
-		gtk_widget_destroy(dialog);
-
-		switch (sett.renderer) {
-		case RENDERER_LATEX_TIKZ:
-			output_file = fopen(file_name, "w");
-			latex_render_cell_to_code(cell_to_render, layer_list, output_file, sett.scale,
-						  sett.tex_pdf_layers, sett.tex_standalone);
-			fclose(output_file);
-			break;
-		case RENDERER_CAIROGRAPHICS:
-			cairo_render_cell_to_pdf(cell_to_render, layer_list, file_name, sett.scale);
-			break;
-		}
-		g_free(file_name);
-
-	} else {
-		gtk_widget_destroy(dialog);
-	}
-ret_layer_destroy:
-	g_list_free_full(layer_list, (GDestroyNotify)delete_layer_info_struct);
-}
-
-/* This function activates/deactivates the convert button depending on whether
- * a cell is selected for conversion or not */
-static void cell_selection_changed(GtkTreeSelection *sel, GtkWidget *convert_button)
-{
-	GtkTreeModel *model = NULL;
-	GtkTreeIter iter;
-
-	if (gtk_tree_selection_get_selected(sel, &model, &iter)) {
-		/* Node selected. Show button */
-		gtk_widget_set_sensitive(convert_button, TRUE);
-	} else {
-		gtk_widget_set_sensitive(convert_button, FALSE);
-	}
-}
-
-GtkWindow *create_main_window()
-{
-	GtkBuilder *main_builder;
-	GtkTreeView *cell_tree;
-	GtkTreeStore *cell_store;
-	GtkWidget *listbox;
-	GtkWidget *conv_button;
-	static GList *gds_libs;
-	static struct open_button_data open_data;
-	static struct convert_button_data conv_data;
-
-	main_builder = gtk_builder_new_from_resource("/main.glade");
-	gtk_builder_connect_signals(main_builder, NULL);
-
-
-
-	cell_tree = GTK_TREE_VIEW(gtk_builder_get_object(main_builder, "cell-tree"));
-	cell_store = setup_cell_selector(cell_tree);
-
-
-	open_data.cell_store = cell_store;
-	open_data.list_ptr = &gds_libs;
-	open_data.main_window = GTK_WINDOW(gtk_builder_get_object(main_builder, "main-window"));
-	g_signal_connect(GTK_WIDGET(gtk_builder_get_object(main_builder, "button-load-gds")),
-			 "clicked", G_CALLBACK(on_load_gds), (gpointer)&open_data);
-
-	/* Connect delete-event */
-	g_signal_connect(GTK_WIDGET(open_data.main_window), "delete-event",
-			 G_CALLBACK(on_window_close), NULL);
-
-	/* Connect Convert button */
-	conv_data.tree_view = cell_tree;
-	conv_data.main_window = open_data.main_window;
-
-	conv_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "convert-button"));
-	g_signal_connect(conv_button, "clicked", G_CALLBACK(on_convert_clicked), &conv_data);
-
-	listbox = GTK_WIDGET(gtk_builder_get_object(main_builder, "layer-list"));
-	open_data.layer_box = GTK_LIST_BOX(listbox);
-
-	/* Set buttons fpr layer mapping GUI */
-	setup_load_mapping_callback(GTK_WIDGET(gtk_builder_get_object(main_builder, "button-load-mapping")),
-				    open_data.main_window);
-	setup_save_mapping_callback(GTK_WIDGET(gtk_builder_get_object(main_builder, "button-save-mapping")),
-				    open_data.main_window);
-
-	/* Callback for selection change of cell selector */
-	g_signal_connect(G_OBJECT(gtk_tree_view_get_selection(cell_tree)), "changed",
-			 G_CALLBACK(cell_selection_changed), conv_button);
-
-	return (conv_data.main_window);
-}

main.c

@@ -14,89 +14,337 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file main.c
+ * @brief main.c
+ * @author Mario Hüttel <mario.huettel@gmx.net>
  */
 
 #include <stdio.h>
 #include <gtk/gtk.h>
-#include "main-window.h"
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <locale.h>
 
+#include <gds-render/gds-render-gui.h>
+#include <gds-render/command-line.h>
+#include <gds-render/output-renderers/external-renderer.h>
+#include <gds-render/version.h>
+
+/**
+ * @brief Structure containing The GtkApplication and a list containing the GdsRenderGui objects.
+ */
 struct application_data {
-	GtkApplication *app;
-	GtkWindow *main_window;
+		GtkApplication *app;
+		GList *gui_list;
 };
 
-
+/**
+ * @brief Callback for the menu entry 'Quit'
+ *
+ * Destroys all GUIs contained in the application_data structure
+ * provided by \p user_data.
+ *
+ * The complete suspension of all main windows leads to the termination of the
+ * GApplication.
+ *
+ * @param action unused
+ * @param parameter unused
+ * @param user_data application_data structure
+ */
 static void app_quit(GSimpleAction *action, GVariant *parameter, gpointer user_data)
 {
-	struct application_data *appdata = (struct application_data *)user_data;
-	gtk_widget_destroy(GTK_WIDGET(appdata->main_window));
+	struct application_data * const appdata = (struct application_data *)user_data;
+	(void)action;
+	(void)parameter;
+	GList *list_iter;
+	GdsRenderGui *gui;
+
+	/* Dispose all GUIs */
+	for (list_iter = appdata->gui_list; list_iter != NULL; list_iter = g_list_next(list_iter)) {
+		gui = RENDERER_GUI(list_iter->data);
+		g_object_unref(gui);
+	}
+
+	g_list_free(appdata->gui_list);
+	appdata->gui_list = NULL;
 }
 
+/**
+ * @brief Callback for the 'About' menu entry
+ *
+ * This function shows the about dialog.
+ *
+ * @param action GSimpleAction, unused
+ * @param parameter Unused.
+ * @param user_data Unused
+ */
 static void app_about(GSimpleAction *action, GVariant *parameter, gpointer user_data)
 {
 	GtkBuilder *builder;
 	GtkDialog *dialog;
-	struct application_data *appdata = (struct application_data *)user_data;
+	GdkPixbuf *logo_buf;
+	GError *error = NULL;
+	(void)user_data;
+	(void)action;
+	(void)parameter;
+	GString *comment_text;
 
-	builder = gtk_builder_new_from_resource("/about.glade");
+	comment_text = g_string_new(_("gds-render is a free tool for rendering GDS2 layout files into vector graphics."));
+	g_string_append_printf(comment_text, _("\n\nFull git commit: %s"), _app_git_commit);
+
+	builder = gtk_builder_new_from_resource("/gui/about.glade");
 	dialog = GTK_DIALOG(gtk_builder_get_object(builder, "about-dialog"));
-	gtk_window_set_transient_for(GTK_WINDOW(dialog), appdata->main_window);
+	gtk_window_set_transient_for(GTK_WINDOW(dialog), NULL);
+	gtk_about_dialog_set_version(GTK_ABOUT_DIALOG(dialog), _app_version_string);
+	gtk_about_dialog_set_comments(GTK_ABOUT_DIALOG(dialog), comment_text->str);
+
+	g_string_free(comment_text, TRUE);
+
+	/* Load icon from resource */
+	logo_buf = gdk_pixbuf_new_from_resource_at_scale("/images/logo.svg", 100, 100, TRUE, &error);
+	if (logo_buf) {
+		/* Set logo */
+		gtk_about_dialog_set_logo(GTK_ABOUT_DIALOG(dialog), logo_buf);
+
+		/* Pixbuf is now owned by about dialog. Unref */
+		g_object_unref(logo_buf);
+	} else if (error) {
+		fprintf(stderr, _("Logo could not be displayed: %s\n"), error->message);
+		g_error_free(error);
+	}
+
 	gtk_dialog_run(dialog);
 
-	gtk_widget_destroy(dialog);
+	gtk_widget_destroy(GTK_WIDGET(dialog));
 	g_object_unref(builder);
 }
 
-const GActionEntry app_actions[] = {
-	{ "quit", app_quit },
-	{ "about", app_about }
+/**
+ * @brief Contains the application menu entries
+ */
+static const GActionEntry app_actions[] = {
+	{ "quit", app_quit, NULL, NULL, NULL, {0} },
+	{ "about", app_about, NULL, NULL, NULL, {0} },
 };
 
+/**
+ * @brief Called when a GUI main window is closed
+ *
+ * The GdsRenderGui object associated with the closed main window
+ * is removed from the list of open GUIs (\p user_data) and dereferenced.
+ *
+ * @param gui The GUI instance the closed main window belongs to
+ * @param user_data List of GUIs
+ */
+static void gui_window_closed_callback(GdsRenderGui *gui, gpointer user_data)
+{
+	GList **gui_list = (GList **)user_data;
+
+	/* Dispose of Gui element */
+	*gui_list = g_list_remove(*gui_list, gui);
+	g_object_unref(gui);
+}
+
+/**
+ * @brief Activation of the GUI
+ * @param app The GApplication reference
+ * @param user_data Used to store the individual GUI instances.
+ */
 static void gapp_activate(GApplication *app, gpointer user_data)
 {
 	GtkWindow *main_window;
-	struct application_data *appdata = (struct application_data *)user_data;
+	GdsRenderGui *gui;
+	struct application_data * const appdata = (struct application_data *)user_data;
+
+	gui = gds_render_gui_new();
+	appdata->gui_list = g_list_append(appdata->gui_list, gui);
+
+	g_signal_connect(gui, "window-closed", G_CALLBACK(gui_window_closed_callback), &appdata->gui_list);
+
+	main_window = gds_render_gui_get_main_window(gui);
 
-	main_window = create_main_window();
-	appdata->main_window = main_window;
 	gtk_application_add_window(GTK_APPLICATION(app), main_window);
 	gtk_widget_show(GTK_WIDGET(main_window));
 }
 
-int main(int argc, char **argv)
+/**
+ * @brief Start the graphical interface.
+ *
+ * This function starts the GUI. If there's already a
+ * running instance of this program, a second window will be
+ * created in that instance and the second one is terminated.
+ *
+ * @param argc
+ * @param argv
+ * @return
+ */
+static int start_gui(int argc, char **argv)
 {
 	GtkApplication *gapp;
+	GString *application_domain;
 	int app_status;
-	struct application_data appdata;
+	static struct application_data appdata = {
+		.gui_list = NULL
+	};
 	GMenu *menu;
 	GMenu *m_quit;
 	GMenu *m_about;
 
-	gapp = gtk_application_new("de.shimatta.gds-render", G_APPLICATION_FLAGS_NONE);
+	/*
+	 * Generate version dependent application id
+	 * This allows running the application in different versions at the same time.
+	 */
+	application_domain = g_string_new(NULL);
+	g_string_printf(application_domain, "de.shimatta.gds_render_%s", _app_git_commit);
+
+	gapp = gtk_application_new(application_domain->str, G_APPLICATION_FLAGS_NONE);
+	g_string_free(application_domain, TRUE);
+
 	g_application_register(G_APPLICATION(gapp), NULL, NULL);
-	//g_action_map_add_action_entries(G_ACTION_MAP(gapp), app_actions, G_N_ELEMENTS(app_actions), &appdata);
-	g_signal_connect (gapp, "activate", G_CALLBACK(gapp_activate), &appdata);
-
+	g_signal_connect(gapp, "activate", G_CALLBACK(gapp_activate), &appdata);
 
+	if (g_application_get_is_remote(G_APPLICATION(gapp)) == TRUE) {
+		g_application_activate(G_APPLICATION(gapp));
+		printf(_("There is already an open instance. Will open second window in that instance.\n"));
+		return 0;
+	}
 
 	menu = g_menu_new();
 	m_quit = g_menu_new();
 	m_about = g_menu_new();
-	g_menu_append(m_quit, "Quit", "app.quit");
-	g_menu_append(m_about, "About", "app.about");
+	g_menu_append(m_quit, _("Quit"), "app.quit");
+	g_menu_append(m_about, _("About"), "app.about");
 	g_menu_append_section(menu, NULL, G_MENU_MODEL(m_about));
 	g_menu_append_section(menu, NULL, G_MENU_MODEL(m_quit));
-	g_action_map_add_action_entries(G_ACTION_MAP(gapp), app_actions, G_N_ELEMENTS(app_actions), &appdata);
+	g_action_map_add_action_entries(G_ACTION_MAP(gapp), app_actions,
+					G_N_ELEMENTS(app_actions), &appdata);
 	gtk_application_set_app_menu(GTK_APPLICATION(gapp), G_MENU_MODEL(menu));
 
 	g_object_unref(m_quit);
 	g_object_unref(m_about);
 	g_object_unref(menu);
 
+	app_status = g_application_run(G_APPLICATION(gapp), argc, argv);
+	g_object_unref(gapp);
 
-	app_status = g_application_run (G_APPLICATION(gapp), argc, argv);
-	g_object_unref (gapp);
+	g_list_free(appdata.gui_list);
+
+	return app_status;
+}
+
+/**
+ * @brief Print the application version string to stdout
+ */
+static void print_version(void)
+{
+	printf(_("This is gds-render, version: %s\n\nFor a list of supported commands execute with --help option.\n"),
+	       _app_version_string);
+}
+
+/**
+ * @brief The "entry point" of the application
+ * @param argc Number of command line parameters
+ * @param argv Command line parameters
+ * @return Execution status of the application
+ */
+int main(int argc, char **argv)
+{
+	int i;
+	GError *error = NULL;
+	GOptionContext *context;
+	gchar *gds_name;
+	gchar **output_paths = NULL;
+	gchar *mappingname = NULL;
+	gchar *cellname = NULL;
+	gchar **renderer_args = NULL;
+	gboolean version = FALSE, pdf_standalone = FALSE, pdf_layers = FALSE;
+	int scale = 1000;
+	int app_status = 0;
+	struct external_renderer_params so_render_params;
+
+	so_render_params.so_path = NULL;
+	so_render_params.cli_params = NULL;
+
+	bindtextdomain(GETTEXT_PACKAGE, LOCALEDATADIR "/locale");
+	bind_textdomain_codeset(GETTEXT_PACKAGE, "UTF-8");
+	textdomain(GETTEXT_PACKAGE);
+
+	GOptionEntry entries[] = {
+		{"version", 'v', 0, G_OPTION_ARG_NONE, &version, _("Print version"), NULL},
+		{"renderer", 'r', 0, G_OPTION_ARG_STRING_ARRAY, &renderer_args,
+			_("Renderer to use. Can be used multiple times."), "pdf|svg|tikz|ext"},
+		{"scale", 's', 0, G_OPTION_ARG_INT, &scale, _("Divide output coordinates by <SCALE>"), "<SCALE>" },
+		{"output-file", 'o', 0, G_OPTION_ARG_FILENAME_ARRAY, &output_paths,
+			_("Output file path. Can be used multiple times."), "PATH" },
+		{"mapping", 'm', 0, G_OPTION_ARG_FILENAME, &mappingname, _("Path for Layer Mapping File"), "PATH" },
+		{"cell", 'c', 0, G_OPTION_ARG_STRING, &cellname, _("Cell to render"), "NAME" },
+		{"tex-standalone", 'a', 0, G_OPTION_ARG_NONE, &pdf_standalone, _("Create standalone TeX"), NULL },
+		{"tex-layers", 'l', 0, G_OPTION_ARG_NONE, &pdf_layers, _("Create PDF Layers (OCG)"), NULL },
+		{"custom-render-lib", 'P', 0, G_OPTION_ARG_FILENAME, &so_render_params.so_path,
+			_("Path to a custom shared object, that implements the necessary rendering functions"), "PATH"},
+		{"render-lib-params", 'W', 0, G_OPTION_ARG_STRING, &so_render_params.cli_params,
+			_("Argument string passed to render lib"), NULL},
+		{NULL, 0, 0, 0, NULL, NULL, NULL}
+	};
+
+	context = g_option_context_new(_(" FILE - Convert GDS file <FILE> to graphic"));
+	g_option_context_add_main_entries(context, entries, NULL);
+	g_option_context_add_group(context, gtk_get_option_group(TRUE));
+
+	if (!g_option_context_parse(context, &argc, &argv, &error)) {
+		g_print(_("Option parsing failed: %s\n"), error->message);
+		exit(1);
+	}
+
+	g_option_context_free(context);
+
+	if (version) {
+		print_version();
+		goto ret_status;
+	}
+
+	if (argc >= 2) {
+		if (scale < 1) {
+			printf(_("Scale < 1 not allowed. Setting to 1\n"));
+			scale = 1;
+		}
+
+		/* Get gds name */
+		gds_name = argv[1];
+
+		/* Print out additional arguments as ignored */
+		for (i = 2; i < argc; i++)
+			printf(_("Ignored argument: %s"), argv[i]);
+
+		app_status =
+			command_line_convert_gds(gds_name, cellname, renderer_args, output_paths, mappingname,
+						 &so_render_params, pdf_standalone, pdf_layers, scale);
+
+	} else {
+		app_status = start_gui(argc, argv);
+	}
+
+ret_status:
+	/* If necessary, free command line parameters.
+	 * This is only really necessary for automated mem-leak testing.
+	 * Omitting these frees would be perfectly fine.
+	 */
+	if (output_paths)
+		g_strfreev(output_paths);
+	if (renderer_args)
+		g_strfreev(renderer_args);
+	if (mappingname)
+		g_free(mappingname);
+	if (cellname)
+		free(cellname);
+	if (so_render_params.so_path)
+		free(so_render_params.so_path);
+	if (so_render_params.cli_params)
+		g_free(so_render_params.cli_params);
 
 	return app_status;
 }

output-renderers/cairo-renderer.c

@@ -0,0 +1,511 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+/**
+ * @file cairo-renderer.c
+ * @brief Output renderer for Cairo PDF export
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/** @addtogroup Cairo-Renderer
+ *  @{
+ */
+
+#include <math.h>
+#include <stdlib.h>
+#include <cairo.h>
+#include <cairo-pdf.h>
+#include <cairo-svg.h>
+#include <glib/gi18n.h>
+
+#include <gds-render/output-renderers/cairo-renderer.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+struct _CairoRenderer {
+	GdsOutputRenderer parent;
+	gboolean svg; /**< @brief TRUE: SVG output, FALSE: PDF output */
+};
+
+G_DEFINE_TYPE(CairoRenderer, cairo_renderer, GDS_RENDER_TYPE_OUTPUT_RENDERER)
+
+/**
+ * @brief The cairo_layer struct
+ * Each rendered layer is represented by this struct.
+ */
+struct cairo_layer {
+	cairo_t *cr; /**< @brief cairo context for layer*/
+	cairo_surface_t *rec; /**< @brief Recording surface to hold the layer */
+	struct layer_info *linfo; /**< @brief Reference to layer information */
+};
+
+/**
+ * @brief Revert the last transformation on all layers
+ * @param layers Pointer to #cairo_layer structures
+ */
+static void revert_inherited_transform(struct cairo_layer *layers)
+{
+	int i;
+
+	for (i = 0; i < MAX_LAYERS; i++) {
+		if (layers[i].cr == NULL)
+			continue;
+		cairo_restore(layers[i].cr);
+	}
+}
+
+/**
+ * @brief Applies transformation to all layers
+ * @param layers Array of layers
+ * @param origin Origin translation
+ * @param magnification Scaling
+ * @param flipping Mirror image on x-axis before rotating
+ * @param rotation Rotation in degrees
+ * @param scale Scale the image down by. Only used for sclaing origin coordinates. Not applied to layer.
+ */
+static void apply_inherited_transform_to_all_layers(struct cairo_layer *layers,
+						    const struct gds_point *origin,
+						    double magnification,
+						    gboolean flipping,
+						    double rotation,
+						    double scale)
+{
+	int i;
+	cairo_t *temp_layer_cr;
+
+	for (i = 0; i < MAX_LAYERS; i++) {
+		temp_layer_cr = layers[i].cr;
+		if (temp_layer_cr == NULL)
+			continue;
+
+		/* Save the state and apply transformation */
+		cairo_save(temp_layer_cr);
+		cairo_translate(temp_layer_cr, (double)origin->x/scale, (double)origin->y/scale);
+		cairo_rotate(temp_layer_cr, M_PI*rotation/180.0);
+		cairo_scale(temp_layer_cr, magnification,
+			    (flipping == TRUE ? -magnification : magnification));
+	}
+}
+
+/**
+ * @brief render_cell Render a cell with its sub-cells
+ * @param cell Cell to render
+ * @param layers Cell will be rendered into these layers
+ * @param scale sclae image down by this factor
+ */
+static void render_cell(struct gds_cell *cell, struct cairo_layer *layers, double scale)
+{
+	GList *instance_list;
+	struct gds_cell *temp_cell;
+	struct gds_cell_instance *cell_instance;
+	GList *gfx_list;
+	struct gds_graphics *gfx;
+	GList *vertex_list;
+	struct gds_point *vertex;
+	cairo_t *cr;
+
+	/* Render child cells */
+	for (instance_list = cell->child_cells; instance_list != NULL; instance_list = instance_list->next) {
+		cell_instance = (struct gds_cell_instance *)instance_list->data;
+		temp_cell = cell_instance->cell_ref;
+		if (temp_cell != NULL) {
+			apply_inherited_transform_to_all_layers(layers,
+								&cell_instance->origin,
+								cell_instance->magnification,
+								cell_instance->flipped,
+								cell_instance->angle,
+								scale);
+			render_cell(temp_cell, layers, scale);
+			revert_inherited_transform(layers);
+		}
+	}
+
+	/* Render graphics */
+	for (gfx_list = cell->graphic_objs; gfx_list != NULL; gfx_list = gfx_list->next) {
+		gfx = (struct gds_graphics *)gfx_list->data;
+
+		/* Get layer renderer */
+		if (gfx->layer >= MAX_LAYERS)
+			continue;
+
+		cr = layers[gfx->layer].cr;
+		if (cr == NULL)
+			continue;
+
+		/* Apply settings */
+		cairo_set_line_width(cr, (gfx->width_absolute ? gfx->width_absolute/scale : 1));
+
+		switch (gfx->path_render_type) {
+		case PATH_FLUSH:
+			cairo_set_line_cap(cr, CAIRO_LINE_CAP_BUTT);
+			break;
+		case PATH_ROUNDED:
+			cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
+			break;
+		case PATH_SQUARED:
+			cairo_set_line_cap(cr, CAIRO_LINE_CAP_SQUARE);
+			break;
+		}
+
+		/* Add vertices */
+		for (vertex_list = gfx->vertices; vertex_list != NULL; vertex_list = vertex_list->next) {
+			vertex = (struct gds_point *)vertex_list->data;
+
+			/* If first point -> move to, else line to */
+			if (vertex_list->prev == NULL)
+				cairo_move_to(cr, vertex->x/scale, vertex->y/scale);
+			else
+				cairo_line_to(cr, vertex->x/scale, vertex->y/scale);
+		}
+
+		/* Create graphics object */
+		switch (gfx->gfx_type) {
+		case GRAPHIC_PATH:
+			cairo_stroke(cr);
+			break;
+		case GRAPHIC_BOX:
+			/* Expected fallthrough */
+		case GRAPHIC_POLYGON:
+			cairo_set_line_width(cr, 0.1/scale);
+			cairo_close_path(cr);
+			cairo_stroke_preserve(cr); // Prevent graphic glitches
+			cairo_fill(cr);
+			break;
+		}
+	} /* for gfx list */
+}
+
+/**
+ * @brief Read a line from a file descriptor
+ *
+ * In case of a broken pipe / closed writing end, it will terminate
+ *
+ * @param fd File descriptor to read from
+ * @param buff Buffer to write data in
+ * @param buff_size Buffer size
+ * @return length of read data
+ */
+static int read_line_from_fd(int fd, char *buff, size_t buff_size)
+{
+	ssize_t cnt;
+	char c;
+	unsigned int buff_cnt = 0;
+
+	while ((cnt = read(fd, &c, 1)) == 1) {
+		if (buff_cnt < (buff_size-1)) {
+			buff[buff_cnt++] = c;
+			if (c == '\n')
+				break;
+		} else {
+			break;
+		}
+	}
+
+	buff[buff_cnt] = 0;
+	return (int)buff_cnt;
+}
+
+/**
+ * @brief Render \p cell to a PDF file specified by \p pdf_file
+ * @param renderer The current renderer this function is running from
+ * @param cell Toplevel cell to @ref Cairo-Renderer
+ * @param layer_infos List of layer information. Specifies color and layer stacking
+ * @param pdf_file PDF output file. Set to NULL if no PDF file has to be generated
+ * @param svg_file SVG output file. Set to NULL if no SVG file has to be generated
+ * @param scale Scale the output image down by \p scale
+ * @return Error
+ */
+static int cairo_renderer_render_cell_to_vector_file(GdsOutputRenderer *renderer,
+						     struct gds_cell *cell,
+						     GList *layer_infos,
+						     const char *pdf_file,
+						     const char *svg_file,
+						     double scale)
+{
+	cairo_surface_t *pdf_surface = NULL, *svg_surface = NULL;
+	cairo_t *pdf_cr = NULL, *svg_cr = NULL;
+	struct layer_info *linfo;
+	struct cairo_layer *layers;
+	struct cairo_layer *lay;
+	GList *info_list;
+	int i;
+	double rec_x0, rec_y0, rec_width, rec_height;
+	double xmin = INT32_MAX, xmax = INT32_MIN, ymin = INT32_MAX, ymax = INT32_MIN;
+	pid_t process_id;
+	int comm_pipe[2];
+	char receive_message[200];
+
+	if (pdf_file == NULL && svg_file == NULL) {
+		/* No output specified */
+		return -1;
+	}
+
+	/* Generate communication pipe for status updates */
+	if (pipe(comm_pipe) == -1)
+		return -2;
+
+	/* Fork to a new child process. This ensures the memory leaks (see issue #16) in Cairo don't
+	 * brick everything.
+	 *
+	 * And by the way: This now bricks all Windows compatibility. Deal with it.
+	 */
+	process_id = fork();
+	//process_id = -1;
+	if (process_id < 0) {
+		/* This should not happen */
+		fprintf(stderr, _("Fatal error: Cairo Renderer: Could not spawn child process!"));
+		exit(-2);
+	} else if (process_id > 0) {
+		/* Woohoo... Successfully dumped the shitty code to an unknowing victim */
+		goto ret_parent;
+	}
+
+	/* We are now in a separate process just for rendering the output image.
+     * You may print a log message to the activity bar of the gui by writing a line
+     * teminated with '\n' to comm_pipe[1]. This will be handled by the parent process.
+     * Directly calling the update function 
+     *     gds_output_renderer_update_async_progress()
+     * does not have any effect because this is a separate process.
+     */
+  
+	/*
+     * Close stdin and (stdout and stderr may live on)
+     */
+	close(0);
+	close(comm_pipe[0]);
+
+	layers = (struct cairo_layer *)calloc(MAX_LAYERS, sizeof(struct cairo_layer));
+
+	/* Clear layers */
+	for (i = 0; i < MAX_LAYERS; i++) {
+		layers[i].cr = NULL;
+		layers[i].rec = NULL;
+	}
+
+	/* Create recording surface for each layer */
+	for (info_list = layer_infos; info_list != NULL; info_list = g_list_next(info_list)) {
+		linfo = (struct layer_info *)info_list->data;
+		if (linfo->layer < MAX_LAYERS) {
+			/* Layer shall not be rendered */
+			if (!linfo->render)
+				continue;
+
+			lay = &(layers[(unsigned int)linfo->layer]);
+			lay->linfo = linfo;
+			lay->rec = cairo_recording_surface_create(CAIRO_CONTENT_COLOR_ALPHA,
+								  NULL);
+			lay->cr = cairo_create(layers[(unsigned int)linfo->layer].rec);
+			cairo_scale(lay->cr, 1, -1); // Fix coordinate system
+			cairo_set_source_rgb(lay->cr, linfo->color.red, linfo->color.green, linfo->color.blue);
+		} else {
+			printf("Layer number (%d) too high!\n", linfo->layer);
+			goto ret_clear_layers;
+		}
+	}
+
+	dprintf(comm_pipe[1], "Rendering layers\n");
+	render_cell(cell, layers, scale);
+
+	/* get size of image and top left coordinate */
+	for (info_list = layer_infos; info_list != NULL; info_list = g_list_next(info_list)) {
+		linfo = (struct layer_info *)info_list->data;
+
+		if (linfo->layer >= MAX_LAYERS) {
+			printf(_("Layer number too high / outside of spec.\n"));
+			continue;
+		}
+
+		if (!linfo->render)
+			continue;
+
+		/* Print size */
+		cairo_recording_surface_ink_extents(layers[linfo->layer].rec, &rec_x0, &rec_y0,
+				&rec_width, &rec_height);
+		dprintf(comm_pipe[1], _("Size of layer %d%s%s%s: <%lf x %lf> @ (%lf | %lf)\n"),
+			linfo->layer,
+			(linfo->name && linfo->name[0] ? " (" : ""),
+			(linfo->name && linfo->name[0] ? linfo->name : ""),
+			(linfo->name && linfo->name[0] ? ")" : ""),
+			rec_width, rec_height, rec_x0, rec_y0);
+
+		/* update bounding box */
+		xmin = MIN(xmin, rec_x0);
+		xmax = MAX(xmax, rec_x0);
+		ymin = MIN(ymin, rec_y0);
+		ymax = MAX(ymax, rec_y0);
+		xmin = MIN(xmin, rec_x0+rec_width);
+		xmax = MAX(xmax, rec_x0+rec_width);
+		ymin = MIN(ymin, rec_y0+rec_height);
+		ymax = MAX(ymax, rec_y0+rec_height);
+
+	}
+
+	/* printf("Cell bounding box: (%lf | %lf) -- (%lf | %lf)\n", xmin, ymin, xmax, ymax); */
+
+	if (pdf_file) {
+		pdf_surface = cairo_pdf_surface_create(pdf_file, xmax-xmin, ymax-ymin);
+		pdf_cr = cairo_create(pdf_surface);
+	}
+
+	if (svg_file) {
+		svg_surface = cairo_svg_surface_create(svg_file, xmax-xmin, ymax-ymin);
+		svg_cr = cairo_create(svg_surface);
+	}
+
+	/* Write layers to PDF */
+	for (info_list = layer_infos; info_list != NULL; info_list = g_list_next(info_list)) {
+		linfo = (struct layer_info *)info_list->data;
+
+		dprintf(comm_pipe[1], _("Exporting layer %d to file\n"), linfo->layer);
+
+		if (linfo->layer >= MAX_LAYERS) {
+			printf(_("Layer outside of spec.\n"));
+			continue;
+		}
+
+		if (!linfo->render)
+			continue;
+
+		if (pdf_file && pdf_cr) {
+			cairo_set_source_surface(pdf_cr, layers[linfo->layer].rec, -xmin, -ymin);
+			cairo_paint_with_alpha(pdf_cr, linfo->color.alpha);
+		}
+
+		if (svg_file && svg_cr) {
+			cairo_set_source_surface(svg_cr, layers[linfo->layer].rec, -xmin, -ymin);
+			cairo_paint_with_alpha(svg_cr, linfo->color.alpha);
+		}
+	}
+
+	if (pdf_file) {
+		cairo_show_page(pdf_cr);
+		cairo_destroy(pdf_cr);
+		cairo_surface_destroy(pdf_surface);
+	}
+
+	if (svg_file) {
+		cairo_show_page(svg_cr);
+		cairo_destroy(svg_cr);
+		cairo_surface_destroy(svg_surface);
+	}
+
+ret_clear_layers:
+	for (i = 0; i < MAX_LAYERS; i++) {
+		lay = &layers[i];
+		if (lay->cr) {
+			cairo_destroy(lay->cr);
+			cairo_surface_destroy(lay->rec);
+		}
+	}
+	free(layers);
+
+	printf(_("Cairo export finished. It might still be buggy!\n"));
+
+	/* Suspend child process */
+	exit(0);
+
+ret_parent:
+	close(comm_pipe[1]);
+
+	while (read_line_from_fd(comm_pipe[0], receive_message, sizeof(receive_message)) > 0) {
+		/* Strip \n from string and replace with ' ' */
+		for (i = 0; receive_message[i] != '\0'; i++) {
+			if (receive_message[i] == '\n')
+				receive_message[i] = ' ';
+		}
+
+		/* Update asyc progress*/
+		gds_output_renderer_update_async_progress(renderer, receive_message);
+	}
+
+	waitpid(process_id, NULL, 0);
+
+	close(comm_pipe[0]);
+	return 0;
+}
+
+static void cairo_renderer_init(CairoRenderer *self)
+{
+	/* PDF default */
+	self->svg = FALSE;
+}
+
+static int cairo_renderer_render_output(GdsOutputRenderer *renderer,
+					struct gds_cell *cell,
+					double scale)
+{
+	CairoRenderer *c_renderer = GDS_RENDER_CAIRO_RENDERER(renderer);
+	const char *pdf_file = NULL;
+	const char *svg_file = NULL;
+	LayerSettings *settings;
+	GList *layer_infos = NULL;
+	const char *output_file;
+	int ret;
+
+	if (!c_renderer)
+		return -2000;
+
+	output_file = gds_output_renderer_get_output_file(renderer);
+	settings = gds_output_renderer_get_and_ref_layer_settings(renderer);
+
+	/* Set layer info list. In case of failure it remains NULL */
+	if (settings)
+		layer_infos = layer_settings_get_layer_info_list(settings);
+
+	if (c_renderer->svg == TRUE)
+		svg_file = output_file;
+	else
+		pdf_file = output_file;
+
+	gds_output_renderer_update_async_progress(renderer, _("Rendering Cairo Output..."));
+	ret = cairo_renderer_render_cell_to_vector_file(renderer, cell, layer_infos, pdf_file, svg_file, scale);
+
+	if (settings)
+		g_object_unref(settings);
+
+	return ret;
+}
+
+static void cairo_renderer_class_init(CairoRendererClass *klass)
+{
+	GdsOutputRendererClass *renderer_class = GDS_RENDER_OUTPUT_RENDERER_CLASS(klass);
+
+	renderer_class->render_output = cairo_renderer_render_output;
+}
+
+CairoRenderer *cairo_renderer_new_pdf()
+{
+	CairoRenderer *renderer;
+
+	renderer = GDS_RENDER_CAIRO_RENDERER(g_object_new(GDS_RENDER_TYPE_CAIRO_RENDERER, NULL));
+	renderer->svg = FALSE;
+
+	return renderer;
+}
+
+CairoRenderer *cairo_renderer_new_svg()
+{
+	CairoRenderer *renderer;
+
+	renderer = GDS_RENDER_CAIRO_RENDERER(g_object_new(GDS_RENDER_TYPE_CAIRO_RENDERER, NULL));
+	renderer->svg = TRUE;
+
+	return renderer;
+}
+
+/** @} */

output-renderers/external-renderer.c

@@ -0,0 +1,293 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file external-renderer.c
+ * @brief This file implements the dynamic library loading for the external rendering feature
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup ExternalRenderer
+ * @{
+ */
+
+#include <dlfcn.h>
+#include <stdio.h>
+#include <sys/wait.h>
+#include <glib/gi18n.h>
+
+#include <gds-render/output-renderers/external-renderer.h>
+#include <gds-render/version.h>
+
+#define FORCE_FORK 0U /**< @brief if != 0, then forking is forced regardless of the shared object's settings */
+
+struct _ExternalRenderer {
+	GdsOutputRenderer parent;
+	char *shared_object_path;
+	char *cli_param_string;
+};
+
+enum {
+	PROP_SO_PATH = 1, /**< @brief Shared object path property */
+	PROP_PARAM_STRING, /** @brief Shared object renderer parameter string from CLI */
+	N_PROPERTIES /**< @brief Used to get property count */
+};
+
+G_DEFINE_TYPE(ExternalRenderer, external_renderer, GDS_RENDER_TYPE_OUTPUT_RENDERER)
+
+/**
+ * @brief Execute render function in shared object to render the supplied cell
+ * @param toplevel_cell Cell to render
+ * @param layer_info_list Layer information (Color etc.)
+ * @param output_file Destination file
+ * @param scale the scaling value to scale the output cell down by.
+ * @param so_path Path to shared object
+ * @param params Parameters passed to EXTERNAL_LIBRARY_INIT_FUNCTION
+ * @return 0 if successful
+ */
+static int external_renderer_render_cell(struct gds_cell *toplevel_cell, GList *layer_info_list,
+				   const char *output_file, double scale,  const char *so_path, const char *params)
+{
+	int (*so_render_func)(struct gds_cell *, GList *, const char *, double) = NULL;
+	int (*so_init_func)(const char *, const char *) = NULL;
+	int (*so_finalize_func)(void) = NULL;
+	void *so_handle = NULL;
+	char *error_msg;
+	int forking_req;
+	int ret = 0;
+	pid_t fork_pid = 0;
+	int forked_status;
+
+	if (!so_path) {
+		fprintf(stderr, _("Path to shared object not set!\n"));
+		return -3000;
+	}
+
+	/* Check parameter sanity */
+	if (!output_file || !toplevel_cell || !layer_info_list)
+		return -3000;
+
+	/* Load shared object */
+	so_handle = dlopen(so_path, RTLD_LAZY);
+	if (!so_handle) {
+		fprintf(stderr, _("Could not load external library '%s'\nDetailed error is:\n%s\n"), so_path, dlerror());
+		return -2000;
+	}
+
+	/* Load rendering symbol from library */
+	so_render_func = (int (*)(struct gds_cell *, GList *, const char *, double))
+				dlsym(so_handle, xstr(EXTERNAL_LIBRARY_RENDER_FUNCTION));
+	error_msg = dlerror();
+	if (error_msg) {
+		fprintf(stderr, _("Rendering function not found in library:\n%s\n"), error_msg);
+		goto ret_close_so_handle;
+	}
+
+	/* Load the init function */
+	so_init_func = (int (*)(const char *, const char *))dlsym(so_handle, xstr(EXTERNAL_LIBRARY_INIT_FUNCTION));
+	error_msg = dlerror();
+	if (error_msg) {
+		fprintf(stderr, _("Rendering function not found in library:\n%s\n"), error_msg);
+		goto ret_close_so_handle;
+	}
+
+	/* Load the finalize function */
+	so_finalize_func = (int (*)(void))dlsym(so_handle, xstr(EXTERNAL_LIBRARY_FINALIZE_FUNCTION));
+	error_msg = dlerror();
+	if (error_msg) {
+		fprintf(stderr, "Finalize function not found in library:\n%s\n", error_msg);
+		goto ret_close_so_handle;
+	}
+
+	/* Check if forking is requested */
+	if (dlsym(so_handle, xstr(EXTERNAL_LIBRARY_FORK_REQUEST)))
+		forking_req = 1;
+	else if (FORCE_FORK)
+		forking_req = 1;
+	else
+		forking_req = 0;
+
+	/* Execute */
+
+	g_message(_("Calling external renderer."));
+
+	if (forking_req)
+		fork_pid = fork();
+	if (fork_pid != 0)
+		goto end_forked;
+
+	ret = so_init_func(params, _app_version_string);
+	if (!ret)
+		ret = so_render_func(toplevel_cell, layer_info_list, output_file, scale);
+
+	/* Finalize the external renderer */
+	ret |= so_finalize_func();
+
+	/* If we are in a separate process, terminate here */
+	if (forking_req)
+		exit(ret);
+
+	/* The forked paths end here */
+end_forked:
+	if (forking_req) {
+		waitpid(fork_pid, &forked_status, 0);
+		ret = WEXITSTATUS(forked_status);
+	}
+
+	g_message(_("External renderer finished."));
+
+ret_close_so_handle:
+	dlclose(so_handle);
+	return ret;
+}
+
+static int external_renderer_render_output(GdsOutputRenderer *renderer,
+					    struct gds_cell *cell,
+					    double scale)
+{
+	ExternalRenderer *ext_renderer = GDS_RENDER_EXTERNAL_RENDERER(renderer);
+	LayerSettings *settings;
+	GList *layer_infos = NULL;
+	const char *output_file;
+	int ret;
+
+	output_file = gds_output_renderer_get_output_file(renderer);
+	settings = gds_output_renderer_get_and_ref_layer_settings(renderer);
+
+	/* Set layer info list. In case of failure it remains NULL */
+	if (settings)
+		layer_infos = layer_settings_get_layer_info_list(settings);
+
+	ret = external_renderer_render_cell(cell, layer_infos, output_file, scale, ext_renderer->shared_object_path,
+					    ext_renderer->cli_param_string);
+	if (settings)
+		g_object_unref(settings);
+
+	return ret;
+}
+
+static void external_renderer_get_property(GObject *obj, guint property_id, GValue *value, GParamSpec *pspec)
+{
+	ExternalRenderer *self;
+
+	self = GDS_RENDER_EXTERNAL_RENDERER(obj);
+
+	switch (property_id) {
+	case PROP_SO_PATH:
+		g_value_set_string(value, self->shared_object_path);
+		break;
+	case PROP_PARAM_STRING:
+		g_value_set_string(value, self->cli_param_string);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID(obj, property_id, pspec);
+		break;
+	}
+}
+
+static void external_renderer_set_property(GObject *obj, guint property_id, const GValue *value, GParamSpec *pspec)
+{
+	ExternalRenderer *self;
+
+	self = GDS_RENDER_EXTERNAL_RENDERER(obj);
+
+	switch (property_id) {
+	case PROP_SO_PATH:
+		if (self->shared_object_path)
+			g_free(self->shared_object_path);
+		self->shared_object_path = g_value_dup_string(value);
+		break;
+	case PROP_PARAM_STRING:
+		if (self->cli_param_string)
+			g_free(self->cli_param_string);
+		self->cli_param_string = g_value_dup_string(value);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID(obj, property_id, pspec);
+		break;
+	}
+}
+
+static void external_renderer_dispose(GObject *self_obj)
+{
+	ExternalRenderer *self;
+
+	self = GDS_RENDER_EXTERNAL_RENDERER(self_obj);
+
+	if (self->shared_object_path) {
+		g_free(self->shared_object_path);
+		self->shared_object_path = NULL;
+	}
+
+	G_OBJECT_CLASS(external_renderer_parent_class)->dispose(self_obj);
+}
+
+static GParamSpec *external_renderer_properties[N_PROPERTIES] = {NULL};
+
+static void external_renderer_class_init(ExternalRendererClass *klass)
+{
+	GdsOutputRendererClass *inherited_parent_class;
+	GObjectClass *oclass;
+
+	inherited_parent_class = GDS_RENDER_OUTPUT_RENDERER_CLASS(klass);
+	oclass = G_OBJECT_CLASS(klass);
+
+	/* Override virtual function */
+	inherited_parent_class->render_output = external_renderer_render_output;
+
+	/* Setup Gobject callbacks */
+	oclass->set_property = external_renderer_set_property;
+	oclass->get_property = external_renderer_get_property;
+	oclass->dispose = external_renderer_dispose;
+
+	/* Setup properties */
+	external_renderer_properties[PROP_SO_PATH] =
+			g_param_spec_string(N_("shared-object-path"),
+					    N_("Shared object file path"),
+					    N_("Path to the shared object to search rendering function in."),
+					    NULL,
+					    G_PARAM_READWRITE);
+	external_renderer_properties[PROP_PARAM_STRING] =
+			g_param_spec_string(N_("param-string"),
+					    N_("Shared object renderer parameter string"),
+					    N_("Command line arguments passed to the external shared object renderer"),
+					    NULL,
+					    G_PARAM_READWRITE);
+	g_object_class_install_properties(oclass, N_PROPERTIES, external_renderer_properties);
+}
+
+static void external_renderer_init(ExternalRenderer *self)
+{
+	self->shared_object_path = NULL;
+	self->cli_param_string = NULL;
+}
+
+ExternalRenderer *external_renderer_new()
+{
+	return g_object_new(GDS_RENDER_TYPE_EXTERNAL_RENDERER, NULL);
+}
+
+ExternalRenderer *external_renderer_new_with_so_and_param(const char *so_path, const char *param_string)
+{
+	return g_object_new(GDS_RENDER_TYPE_EXTERNAL_RENDERER, N_("shared-object-path"), so_path,
+				N_("param-string"), param_string, NULL);
+}
+
+/** @} */

output-renderers/gds-output-renderer.c

@@ -0,0 +1,455 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file gds-output-renderer.c
+ * @brief Base GObject class for output renderers
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/** @addtogroup GdsOutputRenderer
+ *  @{
+ */
+
+#include <gds-render/output-renderers/gds-output-renderer.h>
+#include <glib/gi18n.h>
+
+struct renderer_params {
+		struct gds_cell *cell;
+		double scale;
+};
+
+struct idle_function_params {
+	GMutex message_lock;
+	char *status_message;
+};
+
+typedef struct {
+	gchar *output_file;
+	LayerSettings *layer_settings;
+	GMutex settings_lock;
+	gboolean mutex_init_status;
+	GTask *task;
+	GMainContext *main_context;
+	struct renderer_params async_params;
+	struct idle_function_params idle_function_parameters;
+	gpointer padding[11];
+} GdsOutputRendererPrivate;
+
+enum {
+	PROP_OUTPUT_FILE = 1,
+	PROP_LAYER_SETTINGS,
+	N_PROPERTIES
+};
+
+G_DEFINE_TYPE_WITH_PRIVATE(GdsOutputRenderer, gds_output_renderer, G_TYPE_OBJECT)
+
+enum gds_output_renderer_signal_ids {ASYNC_FINISHED = 0, ASYNC_PROGRESS_CHANGED, GDS_OUTPUT_RENDERER_SIGNAL_COUNT};
+static guint gds_output_renderer_signals[GDS_OUTPUT_RENDERER_SIGNAL_COUNT];
+
+static int gds_output_renderer_render_dummy(GdsOutputRenderer *renderer,
+						struct gds_cell *cell,
+						double scale)
+{
+	(void)renderer;
+	(void)cell;
+	(void)scale;
+
+	g_warning(_("Output renderer does not define a render_output function!"));
+	return 0;
+}
+
+static void gds_output_renderer_dispose(GObject *self_obj)
+{
+	GdsOutputRenderer *renderer = GDS_RENDER_OUTPUT_RENDERER(self_obj);
+	GdsOutputRendererPrivate *priv;
+
+	priv = gds_output_renderer_get_instance_private(renderer);
+
+	if (priv->mutex_init_status) {
+		/* Try locking the mutex, to test if it's free */
+		g_mutex_lock(&priv->settings_lock);
+		g_mutex_unlock(&priv->settings_lock);
+		g_mutex_clear(&priv->settings_lock);
+
+		g_mutex_lock(&priv->idle_function_parameters.message_lock);
+		g_mutex_unlock(&priv->idle_function_parameters.message_lock);
+		g_mutex_clear(&priv->idle_function_parameters.message_lock);
+
+		priv->mutex_init_status = FALSE;
+	}
+
+	g_clear_object(&priv->task);
+
+	if (priv->output_file)
+		g_free(priv->output_file);
+
+	if (priv->idle_function_parameters.status_message) {
+		g_free(priv->idle_function_parameters.status_message);
+		priv->idle_function_parameters.status_message = NULL;
+	}
+
+	g_clear_object(&priv->layer_settings);
+
+	/* Chain up to parent class */
+	G_OBJECT_CLASS(gds_output_renderer_parent_class)->dispose(self_obj);
+}
+
+static void gds_output_renderer_get_property(GObject *obj, guint property_id, GValue *value, GParamSpec *pspec)
+{
+	GdsOutputRenderer *self = GDS_RENDER_OUTPUT_RENDERER(obj);
+	GdsOutputRendererPrivate *priv;
+
+	priv = gds_output_renderer_get_instance_private(self);
+
+	switch (property_id) {
+	case PROP_OUTPUT_FILE:
+		g_value_set_string(value, priv->output_file);
+		break;
+	case PROP_LAYER_SETTINGS:
+		g_value_set_object(value, priv->layer_settings);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID(obj, property_id, pspec);
+		break;
+	}
+}
+
+static void gds_output_renderer_set_property(GObject *obj, guint property_id, const GValue *value, GParamSpec *pspec)
+{
+	GdsOutputRenderer *self = GDS_RENDER_OUTPUT_RENDERER(obj);
+	GdsOutputRendererPrivate *priv;
+
+	priv = gds_output_renderer_get_instance_private(self);
+
+	switch (property_id) {
+	case PROP_OUTPUT_FILE:
+		g_mutex_lock(&priv->settings_lock);
+		if (priv->output_file)
+			g_free(priv->output_file);
+		priv->output_file = g_strdup(g_value_get_string(value));
+		g_mutex_unlock(&priv->settings_lock);
+		break;
+	case PROP_LAYER_SETTINGS:
+		g_mutex_lock(&priv->settings_lock);
+		g_clear_object(&priv->layer_settings);
+		priv->layer_settings = g_value_get_object(value);
+		g_object_ref(priv->layer_settings);
+		g_mutex_unlock(&priv->settings_lock);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID(obj, property_id, pspec);
+		break;
+	}
+}
+
+static GParamSpec *gds_output_renderer_properties[N_PROPERTIES] = {NULL};
+
+static void gds_output_renderer_class_init(GdsOutputRendererClass *klass)
+{
+	GObjectClass *oclass = G_OBJECT_CLASS(klass);
+	GType progress_changed_param_types[1] = {G_TYPE_POINTER};
+
+	klass->render_output = gds_output_renderer_render_dummy;
+
+	oclass->dispose = gds_output_renderer_dispose;
+	oclass->set_property = gds_output_renderer_set_property;
+	oclass->get_property = gds_output_renderer_get_property;
+
+	/* Setup properties */
+	gds_output_renderer_properties[PROP_OUTPUT_FILE] =
+			g_param_spec_string(N_("output-file"), N_("output file"), N_("Output file for renderer"),
+					    NULL, G_PARAM_READWRITE);
+	gds_output_renderer_properties[PROP_LAYER_SETTINGS] =
+			g_param_spec_object(N_("layer-settings"), N_("Layer Settings object"),
+					    N_("Object containing the layer rendering information"),
+					    GDS_RENDER_TYPE_LAYER_SETTINGS, G_PARAM_READWRITE);
+	g_object_class_install_properties(oclass, N_PROPERTIES, gds_output_renderer_properties);
+
+	/* Setup output signals */
+	gds_output_renderer_signals[ASYNC_FINISHED] =
+			g_signal_newv(N_("async-finished"), GDS_RENDER_TYPE_OUTPUT_RENDERER,
+				      G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE,
+				      NULL,
+				      NULL,
+				      NULL,
+				      NULL,
+				      G_TYPE_NONE,
+				      0,
+				      NULL);
+	gds_output_renderer_signals[ASYNC_PROGRESS_CHANGED] =
+			g_signal_newv(N_("progress-changed"), GDS_RENDER_TYPE_OUTPUT_RENDERER,
+				      G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE,
+				      NULL,
+				      NULL,
+				      NULL,
+				      NULL,
+				      G_TYPE_NONE,
+				      1,
+				      progress_changed_param_types);
+}
+
+void gds_output_renderer_init(GdsOutputRenderer *self)
+{
+	GdsOutputRendererPrivate *priv;
+
+	priv = gds_output_renderer_get_instance_private(self);
+
+	priv->layer_settings = NULL;
+	priv->output_file = NULL;
+	priv->task = NULL;
+	priv->mutex_init_status = TRUE;
+	priv->main_context = NULL;
+	priv->idle_function_parameters.status_message = NULL;
+	g_mutex_init(&priv->settings_lock);
+	g_mutex_init(&priv->idle_function_parameters.message_lock);
+}
+
+GdsOutputRenderer *gds_output_renderer_new()
+{
+	return GDS_RENDER_OUTPUT_RENDERER(g_object_new(GDS_RENDER_TYPE_OUTPUT_RENDERER, NULL));
+}
+
+GdsOutputRenderer *gds_output_renderer_new_with_props(const char *output_file, LayerSettings *layer_settings)
+{
+	return GDS_RENDER_OUTPUT_RENDERER(g_object_new(GDS_RENDER_TYPE_OUTPUT_RENDERER,
+						       N_("layer-settings"), layer_settings,
+						       N_("output-file"), output_file,
+						       NULL));
+}
+
+void gds_output_renderer_set_output_file(GdsOutputRenderer *renderer, const gchar *file_name)
+{
+	g_return_if_fail(GDS_RENDER_IS_OUTPUT_RENDERER(renderer));
+
+	/* Check if the filename is actually filled */
+	if (!file_name || !file_name[0])
+		return;
+	g_object_set(renderer, N_("output-file"), file_name, NULL);
+}
+
+const char *gds_output_renderer_get_output_file(GdsOutputRenderer *renderer)
+{
+	const char *file = NULL;
+
+	g_object_get(renderer, N_("output-file"), &file, NULL);
+	return file;
+}
+
+LayerSettings *gds_output_renderer_get_and_ref_layer_settings(GdsOutputRenderer *renderer)
+{
+	LayerSettings *ret = NULL;
+	GdsOutputRendererPrivate *priv;
+
+	priv = gds_output_renderer_get_instance_private(renderer);
+
+	/* Acquire settings lock */
+	g_mutex_lock(&priv->settings_lock);
+
+	/* This function seems to already reference the LayerSettings object */
+	g_object_get(renderer, N_("layer-settings"), &ret, NULL);
+
+	/* It is now safe to clear the lock */
+	g_mutex_unlock(&priv->settings_lock);
+
+	return ret;
+}
+
+void gds_output_renderer_set_layer_settings(GdsOutputRenderer *renderer, LayerSettings *settings)
+{
+	g_return_if_fail(GDS_RENDER_IS_LAYER_SETTINGS(settings));
+
+	g_object_set(renderer, N_("layer-settings"), settings, NULL);
+}
+
+int gds_output_renderer_render_output(GdsOutputRenderer *renderer, struct gds_cell *cell, double scale)
+{
+	int ret;
+	GdsOutputRendererClass *klass;
+	GdsOutputRendererPrivate *priv = gds_output_renderer_get_instance_private(renderer);
+
+	if (GDS_RENDER_IS_OUTPUT_RENDERER(renderer) == FALSE) {
+		g_error(_("Output Renderer not valid."));
+		return GDS_OUTPUT_RENDERER_GEN_ERR;
+	}
+
+	if (!priv->output_file || !priv->output_file[0]) {
+		g_error(_("No/invalid output file set."));
+		return GDS_OUTPUT_RENDERER_GEN_ERR;
+	}
+
+	if (!priv->layer_settings) {
+		g_error(_("No layer specification supplied."));
+		return GDS_OUTPUT_RENDERER_GEN_ERR;
+	}
+
+	if (!cell) {
+		g_error(_("Output renderer called without cell to render."));
+		return GDS_OUTPUT_RENDERER_PARAM_ERR;
+	}
+
+	klass = GDS_RENDER_OUTPUT_RENDERER_GET_CLASS(renderer);
+	if (klass->render_output == NULL) {
+		g_critical(_("Output Renderer: Rendering function broken. This is a bug."));
+		return GDS_OUTPUT_RENDERER_GEN_ERR;
+	}
+
+	ret = klass->render_output(renderer, cell, scale);
+
+	return ret;
+}
+
+static void gds_output_renderer_async_wrapper(GTask *task,
+					     gpointer source_object,
+					     gpointer task_data,
+					     GCancellable *cancellable)
+{
+	GdsOutputRenderer *renderer;
+	GdsOutputRendererPrivate *priv;
+	int ret;
+	(void)task_data;
+	(void)cancellable;
+
+	renderer = GDS_RENDER_OUTPUT_RENDERER(source_object);
+	priv = gds_output_renderer_get_instance_private(renderer);
+	if (!priv) {
+		ret = -1000;
+		goto ret_from_task;
+	}
+	if (!priv->mutex_init_status) {
+		ret = -1001;
+		goto ret_from_task;
+	}
+
+	ret = gds_output_renderer_render_output(renderer, priv->async_params.cell, priv->async_params.scale);
+
+ret_from_task:
+	g_task_return_int(task, ret);
+}
+
+static void gds_output_renderer_async_finished(GObject *src_obj, GAsyncResult *res, gpointer user_data)
+{
+	GdsOutputRendererPrivate *priv;
+	(void)user_data;
+	(void)res; /* Will hopefully be destroyed later */
+
+	priv = gds_output_renderer_get_instance_private(GDS_RENDER_OUTPUT_RENDERER(src_obj));
+
+	priv->main_context = NULL;
+
+	g_signal_emit(src_obj, gds_output_renderer_signals[ASYNC_FINISHED], 0);
+	g_clear_object(&priv->task);
+
+	/* Clear reference set in gds_output_renderer_render_output_async() */
+	g_object_unref(src_obj);
+}
+
+int gds_output_renderer_render_output_async(GdsOutputRenderer *renderer, struct gds_cell *cell, double scale)
+{
+	GdsOutputRendererPrivate *priv;
+	int ret = -1;
+
+	priv = gds_output_renderer_get_instance_private(renderer);
+	if (priv->task) {
+		g_warning(_("Renderer already started asynchronously"));
+		return -2000;
+	}
+
+	priv->task = g_task_new(renderer, NULL, gds_output_renderer_async_finished, NULL);
+	
+	/* This function is not available on current debian distros. */
+	/* g_task_set_name(priv->task, "Rendering Thread"); */
+
+	g_mutex_lock(&priv->settings_lock);
+	priv->async_params.cell = cell;
+	priv->async_params.scale = scale;
+	priv->main_context = g_main_context_default();
+	g_mutex_unlock(&priv->settings_lock);
+
+	/* Self reference. This could end up being nasty... */
+	g_object_ref(renderer);
+
+	/* Do the magic */
+	g_task_run_in_thread(priv->task, gds_output_renderer_async_wrapper);
+
+	return ret;
+}
+
+static gboolean idle_event_processor_callback(gpointer user_data)
+{
+	GdsOutputRenderer *renderer;
+	GdsOutputRendererPrivate *priv;
+	char *status_message;
+
+	/* If the rendering is finished before the mainloop gets to this point
+	 * the renderer is already disposed. Catch this!
+	 */
+	if (!GDS_RENDER_IS_OUTPUT_RENDERER(user_data))
+		return FALSE;
+
+	renderer = GDS_RENDER_OUTPUT_RENDERER(user_data);
+	priv = gds_output_renderer_get_instance_private(renderer);
+
+	if (g_mutex_trylock(&priv->idle_function_parameters.message_lock)) {
+		status_message = priv->idle_function_parameters.status_message;
+		g_signal_emit(renderer, gds_output_renderer_signals[ASYNC_PROGRESS_CHANGED], 0, status_message);
+		g_free(priv->idle_function_parameters.status_message);
+		priv->idle_function_parameters.status_message = NULL;
+		g_mutex_unlock(&priv->idle_function_parameters.message_lock);
+	} else {
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+void gds_output_renderer_update_async_progress(GdsOutputRenderer *renderer, const char *status)
+{
+	GSource *idle_event_processor;
+	GdsOutputRendererPrivate *priv;
+	gboolean skip_source = FALSE;
+
+	g_return_if_fail(GDS_RENDER_IS_OUTPUT_RENDERER(renderer));
+	if (!status)
+		return;
+
+	priv = gds_output_renderer_get_instance_private(renderer);
+
+	/* If rendering is not async */
+	if (!priv->main_context)
+		return;
+
+	g_mutex_lock(&priv->idle_function_parameters.message_lock);
+	if (priv->idle_function_parameters.status_message) {
+		g_free(priv->idle_function_parameters.status_message);
+
+		/* Skip adding new idle source because there's already an active one */
+		skip_source = TRUE;
+	}
+	priv->idle_function_parameters.status_message = g_strdup(status);
+	g_mutex_unlock(&priv->idle_function_parameters.message_lock);
+
+	if (!skip_source) {
+		idle_event_processor = g_idle_source_new();
+		g_source_set_callback(idle_event_processor, idle_event_processor_callback, (gpointer)renderer, NULL);
+		g_source_attach(idle_event_processor, priv->main_context);
+	}
+}
+
+/** @} */

output-renderers/latex-renderer.c

@@ -0,0 +1,465 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file latex-renderer.c
+ * @brief LaTeX Output Renderer
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#include <math.h>
+#include <stdio.h>
+#include <gds-render/output-renderers/latex-renderer.h>
+#include <gdk/gdk.h>
+#include <glib/gi18n.h>
+
+/**
+ * @addtogroup LaTeX-Renderer
+ * @{
+ */
+
+/**
+ * @brief Struct representing the LaTeX-Renderer object.
+ *
+ * This struct holds the LaTeX renderer internal data. It is only used inside the @ref LaTeX-Renderer class.
+ */
+struct _LatexRenderer {
+	GdsOutputRenderer parent;
+	gboolean tex_standalone;
+	gboolean pdf_layers;
+};
+
+G_DEFINE_TYPE(LatexRenderer, latex_renderer, GDS_RENDER_TYPE_OUTPUT_RENDERER)
+
+enum {
+	PROP_STANDALONE = 1,
+	PROP_PDF_LAYERS,
+	N_PROPERTIES
+};
+
+/**
+ * @brief Writes a GString \p buffer to the fixed file tex_file
+ * @note This is a convinience macro. Do not use this anywhere else. It might change behavior in futurtre releases
+ */
+#define WRITEOUT_BUFFER(buff) fwrite((buff)->str, sizeof(char), (buff)->len, tex_file)
+
+/**
+ * @brief Write the layer declarration to TeX file
+ *
+ * This writes the declaration of the layers and the mapping in which order
+ * the layers shall be rendered by TikZ. Layers are written in the order they are
+ * positioned inside the \p layer_infos list.
+ *
+ * @param tex_file TeX-File to write to
+ * @param layer_infos List containing layer_info structs.
+ * @param buffer
+ * @note  The field layer_info::stacked_position is ignored. Stack depends on list order.
+ */
+static void write_layer_definitions(FILE *tex_file, GList *layer_infos, GString *buffer)
+{
+	GList *list;
+	struct layer_info *lifo;
+
+	for (list = layer_infos; list != NULL; list = list->next) {
+		lifo = (struct layer_info *)list->data;
+
+		if (!lifo->render)
+			continue;
+
+		g_string_printf(buffer, "\\pgfdeclarelayer{l%d}\n\\definecolor{c%d}{rgb}{%lf,%lf,%lf}\n",
+				lifo->layer, lifo->layer,
+				lifo->color.red, lifo->color.green, lifo->color.blue);
+		WRITEOUT_BUFFER(buffer);
+	}
+
+	g_string_printf(buffer, "\\pgfsetlayers{");
+	WRITEOUT_BUFFER(buffer);
+
+	for (list = layer_infos; list != NULL; list = list->next) {
+		lifo = (struct layer_info *)list->data;
+
+		if (!lifo->render)
+			continue;
+
+		g_string_printf(buffer, "l%d,", lifo->layer);
+		WRITEOUT_BUFFER(buffer);
+	}
+	g_string_printf(buffer, "main}\n");
+	WRITEOUT_BUFFER(buffer);
+}
+
+/**
+ * @brief Write layer Envirmonment
+ *
+ * If the requested layer shall be rendered, this code writes the necessary code
+ * to open the layer. It also returns the color the layer shall be rendered in.
+ *
+ * The followingenvironments are generated:
+ *
+ * @code{.tex}
+ * \begin{pgfonlayer}{<layer>}
+ * % If pdf layers shall be used also this is enabled:
+ * \begin{scope}[ocg={ref=<layer>, status=visible,name={<Layer Name>}}]
+ * @endcode
+ *
+ *
+ * If the layer shall not be rendered, FALSE is returned and the color is not filled in and
+ * the cod eis not written to the file.
+ *
+ * @param tex_file TeX file to write to
+ * @param color Return of the layer's color
+ * @param layer Requested layer number
+ * @param linfo Layer information list containing layer_info structs
+ * @param buffer Some working buffer
+ * @return TRUE, if the layer shall be rendered.
+ * @note The opened environments have to be closed afterwards
+ */
+static gboolean write_layer_env(FILE *tex_file, GdkRGBA *color, int layer, GList *linfo, GString *buffer)
+{
+	GList *temp;
+	struct layer_info *inf;
+
+	for (temp = linfo; temp != NULL; temp = temp->next) {
+		inf = (struct layer_info *)temp->data;
+		if (inf->layer == layer && inf->render) {
+			color->alpha = inf->color.alpha;
+			color->red = inf->color.red;
+			color->green = inf->color.green;
+			color->blue = inf->color.blue;
+			g_string_printf(buffer,
+					"\\begin{pgfonlayer}{l%d}\n\\ifcreatepdflayers\n\\begin{scope}[ocg={ref=%d, status=visible,name={%s}}]\n\\fi\n",
+					layer, layer, inf->name);
+			WRITEOUT_BUFFER(buffer);
+			return TRUE;
+		}
+	}
+	return FALSE;
+}
+
+/**
+ * @brief Writes a graphics object to the specified tex_file
+ *
+ * This function opens the layer, writes a graphics object and closes the layer
+ *
+ * @param tex_file File to write to
+ * @param graphics Object to render
+ * @param linfo Layer information
+ * @param buffer Working buffer
+ * @param scale Scale abject down by this value
+ */
+static void generate_graphics(FILE *tex_file, GList *graphics, GList *linfo, GString *buffer, double scale)
+{
+	GList *temp;
+	GList *temp_vertex;
+	struct gds_graphics *gfx;
+	struct gds_point *pt;
+	GdkRGBA color;
+	static const char * const line_caps[] = {"butt", "round", "rect"};
+
+	for (temp = graphics; temp != NULL; temp = temp->next) {
+		gfx = (struct gds_graphics *)temp->data;
+		if (write_layer_env(tex_file, &color, (int)gfx->layer, linfo, buffer) == TRUE) {
+
+			/* Layer is defined => create graphics */
+			if (gfx->gfx_type == GRAPHIC_POLYGON || gfx->gfx_type == GRAPHIC_BOX) {
+				g_string_printf(buffer,
+						"\\draw[line width=0.00001 pt, draw={c%d}, fill={c%d}, fill opacity={%lf}] ",
+						gfx->layer, gfx->layer, color.alpha);
+				WRITEOUT_BUFFER(buffer);
+				/* Append vertices */
+				for (temp_vertex = gfx->vertices;
+				     temp_vertex != NULL;
+				     temp_vertex = temp_vertex->next) {
+					pt = (struct gds_point *)temp_vertex->data;
+					g_string_printf(buffer, "(%lf pt, %lf pt) -- ",
+							((double)pt->x)/scale,
+							((double)pt->y)/scale);
+					WRITEOUT_BUFFER(buffer);
+				}
+				g_string_printf(buffer, "cycle;\n");
+				WRITEOUT_BUFFER(buffer);
+			} else if (gfx->gfx_type == GRAPHIC_PATH) {
+
+				if (g_list_length(gfx->vertices) < 2) {
+					printf("Cannot write path with less than 2 points\n");
+					break;
+				}
+
+				if (gfx->path_render_type < 0 || gfx->path_render_type > 2) {
+					printf("Path type unrecognized. Setting to 'flushed'\n");
+					gfx->path_render_type = PATH_FLUSH;
+				}
+
+				g_string_printf(buffer, "\\draw[line width=%lf pt, draw={c%d}, opacity={%lf}, cap=%s] ",
+						gfx->width_absolute/scale, gfx->layer, color.alpha,
+						line_caps[gfx->path_render_type]);
+				WRITEOUT_BUFFER(buffer);
+
+				/* Append vertices */
+				for (temp_vertex = gfx->vertices;
+				     temp_vertex != NULL;
+				     temp_vertex = temp_vertex->next) {
+					pt = (struct gds_point *)temp_vertex->data;
+					g_string_printf(buffer, "(%lf pt, %lf pt)%s",
+							((double)pt->x)/scale,
+							((double)pt->y)/scale,
+							(temp_vertex->next ? " -- " : ""));
+					WRITEOUT_BUFFER(buffer);
+				}
+				g_string_printf(buffer, ";\n");
+				WRITEOUT_BUFFER(buffer);
+			}
+
+			g_string_printf(buffer, "\\ifcreatepdflayers\n\\end{scope}\n\\fi\n\\end{pgfonlayer}\n");
+			WRITEOUT_BUFFER(buffer);
+		}
+
+	} /* For graphics */
+}
+
+/**
+ * @brief Render cell to file
+ * @param cell Cell to render
+ * @param layer_infos Layer information
+ * @param tex_file File to write to
+ * @param buffer Working buffer
+ * @param scale Scale output down by this value
+ * @param renderer The current renderer as GdsOutputRenderer. This is used to emit the status updates to the GUI
+ */
+static void render_cell(struct gds_cell *cell, GList *layer_infos, FILE *tex_file, GString *buffer, double scale,
+			GdsOutputRenderer *renderer)
+{
+	GString *status;
+	GList *list_child;
+	struct gds_cell_instance *inst;
+
+	status = g_string_new(NULL);
+	g_string_printf(status, _("Generating cell %s"), cell->name);
+	gds_output_renderer_update_async_progress(renderer, status->str);
+	g_string_free(status, TRUE);
+
+	/* Draw polygons of current cell */
+	generate_graphics(tex_file, cell->graphic_objs, layer_infos, buffer, scale);
+
+	/* Draw polygons of childs */
+	for (list_child = cell->child_cells; list_child != NULL; list_child = list_child->next) {
+		inst = (struct gds_cell_instance *)list_child->data;
+
+		/* Abort if cell has no reference */
+		if (!inst->cell_ref)
+			continue;
+
+		/* generate translation scope */
+		g_string_printf(buffer, "\\begin{scope}[shift={(%lf pt,%lf pt)}]\n",
+				((double)inst->origin.x) / scale, ((double)inst->origin.y) / scale);
+		WRITEOUT_BUFFER(buffer);
+
+		g_string_printf(buffer, "\\begin{scope}[rotate=%lf]\n", inst->angle);
+		WRITEOUT_BUFFER(buffer);
+
+		g_string_printf(buffer, "\\begin{scope}[yscale=%lf, xscale=%lf]\n",
+				(inst->flipped ? -1*inst->magnification : inst->magnification),
+				inst->magnification);
+		WRITEOUT_BUFFER(buffer);
+
+		render_cell(inst->cell_ref, layer_infos, tex_file, buffer, scale, renderer);
+
+		g_string_printf(buffer, "\\end{scope}\n");
+		WRITEOUT_BUFFER(buffer);
+
+		g_string_printf(buffer, "\\end{scope}\n");
+		WRITEOUT_BUFFER(buffer);
+
+		g_string_printf(buffer, "\\end{scope}\n");
+		WRITEOUT_BUFFER(buffer);
+	}
+
+}
+
+static int latex_render_cell_to_code(struct gds_cell *cell, GList *layer_infos, FILE *tex_file, double scale,
+			       gboolean create_pdf_layers, gboolean standalone_document, GdsOutputRenderer *renderer)
+{
+	GString *working_line;
+
+
+	if (!tex_file || !layer_infos || !cell)
+		return -1;
+
+	/* 10 kB Line working buffer should be enough */
+	working_line = g_string_new_len(NULL, LATEX_LINE_BUFFER_KB*1024);
+
+	/* standalone foo */
+	g_string_printf(working_line, "\\newif\\iftestmode\n\\testmode%s\n",
+			(standalone_document ? "true" : "false"));
+	WRITEOUT_BUFFER(working_line);
+	g_string_printf(working_line, "\\newif\\ifcreatepdflayers\n\\createpdflayers%s\n",
+			(create_pdf_layers ? "true" : "false"));
+	WRITEOUT_BUFFER(working_line);
+	g_string_printf(working_line, "\\iftestmode\n");
+	WRITEOUT_BUFFER(working_line);
+	g_string_printf(working_line,
+			"\\documentclass[tikz]{standalone}\n\\usepackage{xcolor}\n\\usetikzlibrary{ocgx}\n\\begin{document}\n");
+	WRITEOUT_BUFFER(working_line);
+	g_string_printf(working_line, "\\fi\n");
+	WRITEOUT_BUFFER(working_line);
+
+	/* Write layer definitions */
+	write_layer_definitions(tex_file, layer_infos, working_line);
+
+	/* Open tikz Pictute */
+	g_string_printf(working_line, "\\begin{tikzpicture}\n");
+	WRITEOUT_BUFFER(working_line);
+
+	/* Generate graphics output */
+	render_cell(cell, layer_infos, tex_file, working_line, scale, renderer);
+
+
+	g_string_printf(working_line, "\\end{tikzpicture}\n");
+	WRITEOUT_BUFFER(working_line);
+
+	g_string_printf(working_line, "\\iftestmode\n");
+	WRITEOUT_BUFFER(working_line);
+	g_string_printf(working_line, "\\end{document}\n");
+	WRITEOUT_BUFFER(working_line);
+	g_string_printf(working_line, "\\fi\n");
+	WRITEOUT_BUFFER(working_line);
+
+	fflush(tex_file);
+	g_string_free(working_line, TRUE);
+
+	return 0;
+}
+
+static int latex_renderer_render_output(GdsOutputRenderer *renderer,
+					  struct gds_cell *cell,
+					  double scale)
+{
+	LatexRenderer *l_renderer = GDS_RENDER_LATEX_RENDERER(renderer);
+	FILE *tex_file;
+	int ret = -2;
+	LayerSettings *settings;
+	GList *layer_infos = NULL;
+	const char *output_file;
+
+	output_file = gds_output_renderer_get_output_file(renderer);
+	settings = gds_output_renderer_get_and_ref_layer_settings(renderer);
+
+	/* Set layer info list. In case of failure it remains NULL */
+	if (settings)
+		layer_infos = layer_settings_get_layer_info_list(settings);
+
+	tex_file = fopen(output_file, "w");
+	if (tex_file) {
+		ret = latex_render_cell_to_code(cell, layer_infos, tex_file, scale,
+						l_renderer->pdf_layers, l_renderer->tex_standalone, renderer);
+		fclose(tex_file);
+	} else {
+		g_error(_("Could not open LaTeX output file"));
+	}
+
+	if (settings)
+		g_object_unref(settings);
+
+	return ret;
+}
+
+static void latex_renderer_init(LatexRenderer *self)
+{
+	self->pdf_layers = FALSE;
+	self->tex_standalone = FALSE;
+}
+
+static void latex_renderer_get_property(GObject *obj, guint property_id, GValue *value, GParamSpec *pspec)
+{
+	LatexRenderer *self = GDS_RENDER_LATEX_RENDERER(obj);
+
+	switch (property_id) {
+	case PROP_STANDALONE:
+		g_value_set_boolean(value, self->tex_standalone);
+		break;
+	case PROP_PDF_LAYERS:
+		g_value_set_boolean(value, self->pdf_layers);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID(obj, property_id, pspec);
+		break;
+	}
+}
+
+static void latex_renderer_set_property(GObject *obj, guint property_id, const GValue *value, GParamSpec *pspec)
+{
+	LatexRenderer *self = GDS_RENDER_LATEX_RENDERER(obj);
+
+	switch (property_id) {
+	case PROP_STANDALONE:
+		self->tex_standalone = g_value_get_boolean(value);
+		break;
+	case PROP_PDF_LAYERS:
+		self->pdf_layers = g_value_get_boolean(value);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID(obj, property_id, pspec);
+		break;
+	}
+}
+
+static GParamSpec *latex_renderer_properties[N_PROPERTIES] = {NULL};
+
+static void latex_renderer_class_init(LatexRendererClass *klass)
+{
+	GdsOutputRendererClass *render_class = GDS_RENDER_OUTPUT_RENDERER_CLASS(klass);
+	GObjectClass *oclass = G_OBJECT_CLASS(klass);
+
+	/* Overwrite virtual function */
+	render_class->render_output = latex_renderer_render_output;
+
+	/* Property stuff */
+	oclass->get_property = latex_renderer_get_property;
+	oclass->set_property = latex_renderer_set_property;
+
+	latex_renderer_properties[PROP_STANDALONE] =
+			g_param_spec_boolean("standalone",
+					     N_("Standalone TeX file"),
+					     N_("Generate a standalone LaTeX file."),
+					     FALSE,
+					     G_PARAM_READWRITE);
+	latex_renderer_properties[PROP_PDF_LAYERS] =
+			g_param_spec_boolean("pdf-layers",
+					     N_("PDF OCR layers"),
+					     N_("Generate OCR layers"),
+					     FALSE,
+					     G_PARAM_READWRITE);
+
+	g_object_class_install_properties(oclass, N_PROPERTIES, latex_renderer_properties);
+}
+
+LatexRenderer *latex_renderer_new()
+{
+	return GDS_RENDER_LATEX_RENDERER(g_object_new(GDS_RENDER_TYPE_LATEX_RENDERER, NULL));
+}
+
+LatexRenderer *latex_renderer_new_with_options(gboolean pdf_layers, gboolean standalone)
+{
+	GObject *obj;
+
+	obj = g_object_new(GDS_RENDER_TYPE_LATEX_RENDERER, "standalone", standalone, "pdf-layers", pdf_layers, NULL);
+	return GDS_RENDER_LATEX_RENDERER(obj);
+}
+
+/** @} */

plugins/CMakeLists.txt

@@ -0,0 +1,4 @@
+add_subdirectory(plugin-example)
+add_subdirectory(python-renderer)
+
+add_custom_target(plugins DEPENDS pluginexample pythonrenderer)

plugins/plugin-example/CMakeLists.txt

@@ -0,0 +1,13 @@
+project(pluginexample)
+cmake_minimum_required(VERSION 2.8)
+find_package(PkgConfig REQUIRED)
+
+aux_source_directory(src SOURCES)
+
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include)
+link_libraries(version)
+
+add_library(${PROJECT_NAME} SHARED EXCLUDE_FROM_ALL ${SOURCES})
+add_dependencies(${PROJECT_NAME} version)
+set_target_properties(${PROJECT_NAME} PROPERTIES C_VISIBILITY_PRESET hidden)
+set_target_properties(${PROJECT_NAME} PROPERTIES CXX_VISIBILITY_PRESET hidden)

plugins/plugin-example/src/plugin-main.c

@@ -0,0 +1,54 @@
+/*
+ * GDSII-Converter example plugin
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @defgroup example-plugin Example Plugin for External Renderer
+ * @ingroup plugins
+ * This is a template / example for an external renderer plugin
+ * @addtogroup example-plugin
+ * @{
+ */
+
+#include <stdio.h>
+#include <glib.h>
+#include <gds-render/gds-utils/gds-types.h>
+#include <gds-render/output-renderers/external-renderer-interfaces.h>
+
+int EXPORTED_FUNC_DECL(EXTERNAL_LIBRARY_RENDER_FUNCTION)(struct gds_cell *toplevel, GList *layer_info_list, const char *output_file_name, double scale)
+{
+	if (!toplevel)
+		return -1000;
+
+	printf("Rendering %s\n", toplevel->name);
+	return 0;
+}
+
+int EXPORTED_FUNC_DECL(EXTERNAL_LIBRARY_INIT_FUNCTION)(const char *params, const char *version)
+{
+	printf("Init with params: %s\ngds-render version: %s\n", params, version);
+	return 0;
+}
+
+int EXPORTED_FUNC_DECL(EXTERNAL_LIBRARY_FINALIZE_FUNCTION)(void)
+{
+	printf("Finalize function called.\n");
+	return 0;
+}
+
+/** @} */

plugins/python-renderer/CMakeLists.txt

@@ -0,0 +1,34 @@
+project(pythonrenderer)
+cmake_minimum_required(VERSION 2.8.8)
+find_package(PythonLibs)
+
+if(NOT WIN32)
+  string(ASCII 27 Esc)
+  set(ColorReset "${Esc}[m")
+  set(ColorBold  "${Esc}[1m")
+  set(Red         "${Esc}[31m")
+  set(Green       "${Esc}[32m")
+  set(Yellow      "${Esc}[33m")
+  set(Blue        "${Esc}[34m")
+  set(Magenta     "${Esc}[35m")
+  set(Cyan        "${Esc}[36m")
+  set(White       "${Esc}[37m")
+  set(BoldRed     "${Esc}[1;31m")
+  set(BoldGreen   "${Esc}[1;32m")
+  set(BoldYellow  "${Esc}[1;33m")
+  set(BoldBlue    "${Esc}[1;34m")
+  set(BoldMagenta "${Esc}[1;35m")
+  set(BoldCyan    "${Esc}[1;36m")
+  set(BoldWhite   "${Esc}[1;37m")
+endif()
+
+aux_source_directory(src SOURCES)
+
+include_directories(${PYTHON_INCLUDE_DIRS} ${CMAKE_CURRENT_SOURCE_DIR}/include)
+link_libraries(${PYTHON_LIBRARIES} version)
+
+message("${BoldCyan}Python version found: ${PYTHONLIBS_VERSION_STRING}${ColorReset}")
+
+add_library(${PROJECT_NAME} SHARED EXCLUDE_FROM_ALL ${SOURCES})
+add_dependencies(${PROJECT_NAME} version)
+

plugins/python-renderer/include/python-renderer/force-fork.h

@@ -0,0 +1,43 @@
+/*
+ * GDSII-Converter Python Plugin
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file force-fork.h
+ * @brief Header file force fork variabel definition.
+ *
+ * This file makes the force fork variable accessible.
+ * Actually this is kind of useless. However, here it is :)
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#ifndef __PYTHON_PLUGIN_FORCE_FORK_H__
+#define __PYTHON_PLUGIN_FORCE_FORK_H__
+
+/**
+ * @addtogroup python-plugin
+ * @{
+ */
+#include <gds-render/output-renderers/external-renderer-interfaces.h>
+
+extern const int VAR_DECL(EXTERNAL_LIBRARY_FORK_REQUEST);
+
+/** @} */
+
+#endif /* __PYTHON_PLUGIN_FORCE_FORK_H__ */
+

plugins/python-renderer/include/python-renderer/gds-render-module.h

@@ -0,0 +1,49 @@
+/*
+ * GDSII-Converter Python Plugin
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file gds-render-module.h
+ * @brief Header file for the gds-render python module implementation
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#ifndef __GDS_RENDER_MODULE_H__
+#define __GDS_RENDER_MODULE_H__
+
+/**
+ * @addtogroup python-renderer
+ * @{
+ */
+
+#include <Python.h>
+
+/**
+ * @brief The gds_render python module name as string
+ */
+#define GDS_RENDER_MOD_NAME "gds_render"
+
+/**
+ * @brief Set up the gds_render python module
+ * @return New module reference
+ */
+PyObject *init_gds_render_module();
+
+/** @} */
+
+#endif /* __GDS_RENDER_MODULE_H__ */

plugins/python-renderer/include/python-renderer/glist.h

@@ -0,0 +1,50 @@
+/*
+ * GDSII-Converter Python Plugin
+ * Copyright (C) 2020  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file python-renderer/glist.c
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @defgroup python-plugin-glist GList wrapper for python
+ * @ingroup python-plugin
+ * This is a wrapping class for GLists
+ * @addtogroup python-plugin-glist
+ * @{
+ */
+
+#ifndef __GLIST_H__
+#define __GLIST_H__
+
+#ifndef PY_SSIZE_T_CLEAN
+#define PY_SSIZE_T_CLEAN
+#endif
+#include <Python.h>
+#include <glib.h>
+
+extern PyTypeObject GListType;
+
+typedef struct _GListObject GListObject;
+
+void glist_set_head_ptr(GListObject *self, GList *head);
+
+#endif /* __GLIST_H__ */
+
+/** @} */

plugins/python-renderer/src/force-fork.c

@@ -0,0 +1,37 @@
+/*
+ * GDSII-Converter Python Plugin
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file python-renderer/force-fork.c
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#include <python-renderer/force-fork.h>
+
+/**
+ * @addtogroup python-plugin
+ * @{
+ */
+
+/* The precense of this variable tells the gds-render application to execute this plugin in a separate process
+ * The variable's value is don't care
+ */
+const int EXPORTED_VAR_DECL(EXTERNAL_LIBRARY_FORK_REQUEST) = 1;
+
+/** @} */

plugins/python-renderer/src/gds-render-module.c

@@ -0,0 +1,100 @@
+/*
+ * GDSII-Converter Python Plugin
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file gds-render-module.c
+ * @brief Gds-render python module implementation
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#include <python-renderer/gds-render-module.h>
+#include <gds-render/gds-utils/gds-types.h>
+#include <python-renderer/glist.h>
+
+static PyObject *test(PyObject *self, PyObject *args)
+{
+	long int i;
+
+	if(!PyArg_ParseTuple(args, "l:get_number", &i))
+		return NULL;
+
+	i *= i;
+
+	return PyLong_FromLong(i);
+}
+
+static PyMethodDef gds_render_methods[] = {
+	{"get_number", test, METH_VARARGS, "Return the number of arguments received by the process."},
+	{NULL, NULL, 0, NULL}
+};
+
+static PyModuleDef gds_render_module_def = {
+	PyModuleDef_HEAD_INIT,
+	.m_name = GDS_RENDER_MOD_NAME,
+	.m_doc = "GDS Render Base App Module",
+	.m_size = -1,
+	.m_methods = gds_render_methods,
+	NULL, NULL, NULL, NULL
+};
+
+static int gds_render_module_check_types_ready()
+{
+	if (!PyType_Ready(&GListType))
+		return -1;
+
+	return 0;
+}
+
+static int gds_render_module_add_types(PyObject *module)
+{
+	int err;
+
+	Py_INCREF(&GListType);
+	err = PyModule_AddObject(module, "GdsPoint", (PyObject *)&GListType);
+	if (err < 0) {
+		goto decref_glist;
+	}
+
+	return 0;
+
+decref_glist:
+	Py_DECREF(&GListType);
+	return -1;
+}
+
+PyObject *init_gds_render_module(void)
+{
+	int err;
+	PyObject *gds_render_module;
+
+	if (gds_render_module_check_types_ready())
+		return NULL;
+
+	gds_render_module = PyModule_Create(&gds_render_module_def);
+
+	err = gds_render_module_add_types(gds_render_module);
+	if (err) {
+		Py_DECREF(gds_render_module);
+		gds_render_module = NULL;
+		goto return_module;
+	}
+
+return_module:
+	return gds_render_module;
+}

plugins/python-renderer/src/glist.c

@@ -0,0 +1,72 @@
+/*
+ * GDSII-Converter Python Plugin
+ * Copyright (C) 2020  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file python-renderer/glist.c
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @defgroup python-plugin-glist GList wrapper for python
+ * @ingroup python-plugin
+ * This is a wrapping class for GLists
+ * This wrpper acts as a read only access to the lists
+ *
+ * @addtogroup python-plugin-glist
+ * @{
+ */
+
+#include <python-renderer/glist.h>
+
+struct _GListObject {
+	PyObject_HEAD
+	GList *head;
+	size_t len;
+};
+
+static PyObject *glist_to_list(GListObject *self, PyObject *Py_UNUSED(ignored))
+{
+	return Py_BuildValue("");
+}
+
+static PyMethodDef glist_methods[] = {
+	{"tolist", (PyCFunction)glist_to_list, METH_NOARGS, "Convert GList to editable list"}
+};
+
+void glist_set_head_ptr(GListObject *self, GList *head)
+{
+	if (!self || !head)
+		return;
+
+	self->head = head;
+	self->len = g_list_length(self->head);
+}
+
+PyTypeObject GListType = {
+	PyVarObject_HEAD_INIT(NULL, 0)
+	.tp_name = "gds_render.GList",
+	.tp_doc = "Read only GList",
+	.tp_basicsize = sizeof(GListObject),
+	.tp_itemsize = 0,
+	.tp_flags = Py_TPFLAGS_DEFAULT,
+	.tp_new = PyType_GenericNew,
+	.tp_methods = glist_methods
+};
+
+/** @} */

plugins/python-renderer/src/plugin-main.c

@@ -0,0 +1,173 @@
+/*
+ * GDSII-Converter Python Plugin
+ * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GDSII-Converter. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file python-renderer/plugin-main.c
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @defgroup python-plugin Python Plugin for External Renderer
+ * @ingroup plugins
+ * This is a plugin for calling an external python script as renderer
+ * @addtogroup python-plugin
+ * @{
+ */
+
+#include <stdio.h>
+#include <libgen.h>
+#include <glib.h>
+#include <unistd.h>
+#include <Python.h>
+
+#include <gds-render/gds-utils/gds-types.h>
+#include <gds-render/output-renderers/external-renderer-interfaces.h>
+
+#include <python-renderer/gds-render-module.h>
+
+/**
+ * @brief Global variable for loaded module. This is not very nice.
+ * @warning This has to be changed, if this api wants to be re-entrant.
+ */
+static PyObject *p_module = NULL;
+
+int EXPORTED_FUNC_DECL(EXTERNAL_LIBRARY_RENDER_FUNCTION)(struct gds_cell *toplevel, GList *layer_info_list, const char *output_file_name, double scale)
+{
+	int ret = 0;
+	PyObject *p_render_func;
+	PyObject *p_return_value;
+
+	if (!toplevel)
+		return -1000;
+	if (!p_module)
+		return -2000;
+
+	printf("Rendering %s\n", toplevel->name);
+
+	p_render_func = PyObject_GetAttrString(p_module, "test_func");
+	if (!p_render_func && !PyCallable_Check(p_render_func)) {
+		if (PyErr_Occurred())
+			PyErr_Print();
+		else
+			fprintf(stderr, "Function not found in python module\n");
+
+		ret = -1;
+		goto return_value;
+	}
+
+	p_return_value = PyObject_CallObject(p_render_func, NULL);
+	if (p_return_value) {
+		printf("Result of call: %ld\n", PyLong_AsLong(p_return_value));
+		Py_DECREF(p_return_value);
+	}
+
+	Py_XDECREF(p_render_func);
+
+return_value:
+	return ret;
+}
+
+int EXPORTED_FUNC_DECL(EXTERNAL_LIBRARY_INIT_FUNCTION)(const char *params, const char *version)
+{
+	int ret = 0;
+	PyObject *p_name;
+	PyObject *p_sys_path;
+	PyObject *p_mod_dir_string;
+	PyObject *gds_render_module;
+	char file_path[PATH_MAX];
+	char *file_path_for_dir;
+	char *file_path_for_base;
+	char *dir_name;
+	char *base_name;
+
+	if (!params || !version)
+		return -1000;
+
+	printf("Init with params: %s\ngds-render version: %s\n", params, version);
+
+	ret = PyImport_AppendInittab("gds_render", &init_gds_render_module);
+	if (ret) {
+		ret = -1;
+		fprintf(stderr, "Registration of gds_render python module failed\n");
+		goto return_value;
+	}
+
+	Py_Initialize();
+
+	if (!realpath(params, file_path)) {
+		ret = -2;
+		fprintf(stderr, "Invalid file name.\n");
+		goto return_value;
+	}
+
+	file_path_for_dir = strdup(file_path);
+	if (!file_path_for_dir) {
+		ret = -3;
+		goto return_value;
+	}
+
+	file_path_for_base = strdup(file_path);
+	if (!file_path_for_base) {
+		ret = -3;
+		free (file_path_for_dir);
+		goto return_value;
+	}
+
+	dir_name = dirname(file_path_for_dir);
+	base_name = basename(file_path_for_base);
+
+	printf("Dir name : %s\n BAse name: %s\n", dir_name, base_name);
+
+	p_sys_path = PySys_GetObject("path");
+	p_mod_dir_string = PyUnicode_FromString(dir_name);
+	PyList_Append(p_sys_path, p_mod_dir_string);
+	Py_DECREF(p_mod_dir_string);
+
+	p_name = PyUnicode_DecodeFSDefault(strtok(base_name, "."));
+	p_module = PyImport_Import(p_name);
+	Py_DECREF(p_name);
+
+	if (!p_module) {
+		PyErr_Print();
+		fprintf(stderr, "Failed to load %s\n", params);
+		ret = -1;
+		goto return_value;
+	}
+
+	free(file_path_for_dir);
+	free(file_path_for_base);
+
+return_value:
+	return ret;
+}
+
+int EXPORTED_FUNC_DECL(EXTERNAL_LIBRARY_FINALIZE_FUNCTION)(void)
+{
+	int ret;
+
+	printf("Finalizing\n");
+
+	if (p_module)
+		Py_DECREF(p_module);
+
+	ret = Py_FinalizeEx();
+	return ret;
+}
+
+/** @} */

resources/CMakeLists.txt

@@ -0,0 +1,10 @@
+add_custom_target(glib-resources DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/resources.c")
+add_custom_command(DEPENDS
+	                 "${CMAKE_CURRENT_SOURCE_DIR}/*.glade"
+			 "${CMAKE_CURRENT_SOURCE_DIR}/resources.xml"
+			 "${CMAKE_CURRENT_SOURCE_DIR}/color-palette.txt"
+		   OUTPUT
+		        "${CMAKE_CURRENT_BINARY_DIR}/resources.c"
+		   COMMAND 
+			glib-compile-resources --target="${CMAKE_CURRENT_BINARY_DIR}/resources.c" --sourcedir="${CMAKE_CURRENT_SOURCE_DIR}" --generate-source "${CMAKE_CURRENT_SOURCE_DIR}/resources.xml"
+		   )

resources/about.glade

@@ -6,11 +6,12 @@
     <property name="can_focus">False</property>
     <property name="type_hint">dialog</property>
     <property name="program_name">GDS-Render Tool </property>
-    <property name="comments" translatable="yes">Tool for rendering GDS(II) layout files into LaTeX/TikZ code or directly into a PDF file</property>
+    <property name="version">!! Replaced during runtime !!</property>
+    <property name="comments" translatable="yes">!! Replaced during runtime !!</property>
     <property name="website">https://git.shimatta.de/mhu/gds-render</property>
     <property name="website_label" translatable="yes">Git Repository</property>
     <property name="authors">Mario Hüttel &lt;mario.huettel@gmx.net&gt;</property>
-    <property name="logo_icon_name">applications-graphics</property>
+    <property name="logo_icon_name"/>
     <property name="license_type">gpl-2-0-only</property>
     <child>
       <placeholder/>

resources/color-palette.txt

@@ -0,0 +1,255 @@
+800000
+008000
+808000
+000080
+800080
+008080
+c0c0c0
+808080
+ff0000
+00ff00
+ffff00
+0000ff
+ff00ff
+00ffff
+f105f5
+000000
+00005f
+000087
+0000af
+0000d7
+0000ff
+005f00
+005f5f
+005f87
+005faf
+005fd7
+005fff
+008700
+00875f
+008787
+0087af
+0087d7
+0087ff
+00af00
+00af5f
+00af87
+00afaf
+00afd7
+00afff
+00d700
+00d75f
+00d787
+00d7af
+00d7d7
+00d7ff
+00ff00
+00ff5f
+00ff87
+00ffaf
+00ffd7
+00ffff
+5f0000
+5f005f
+5f0087
+5f00af
+5f00d7
+5f00ff
+5f5f00
+5f5f5f
+5f5f87
+5f5faf
+5f5fd7
+5f5fff
+5f8700
+5f875f
+5f8787
+5f87af
+5f87d7
+5f87ff
+5faf00
+5faf5f
+5faf87
+5fafaf
+5fafd7
+5fafff
+5fd700
+5fd75f
+5fd787
+5fd7af
+5fd7d7
+5fd7ff
+5fff00
+5fff5f
+5fff87
+5fffaf
+5fffd7
+5fffff
+870000
+87005f
+870087
+8700af
+8700d7
+8700ff
+875f00
+875f5f
+875f87
+875faf
+875fd7
+875fff
+878700
+87875f
+878787
+8787af
+8787d7
+8787ff
+87af00
+87af5f
+87af87
+87afaf
+87afd7
+87afff
+87d700
+87d75f
+87d787
+87d7af
+87d7d7
+87d7ff
+87ff00
+87ff5f
+87ff87
+87ffaf
+87ffd7
+87ffff
+af0000
+af005f
+af0087
+af00af
+af00d7
+af00ff
+af5f00
+af5f5f
+af5f87
+af5faf
+af5fd7
+af5fff
+af8700
+af875f
+af8787
+af87af
+af87d7
+af87ff
+afaf00
+afaf5f
+afaf87
+afafaf
+afafd7
+afafff
+afd700
+afd75f
+afd787
+afd7af
+afd7d7
+afd7ff
+afff00
+afff5f
+afff87
+afffaf
+afffd7
+afffff
+d70000
+d7005f
+d70087
+d700af
+d700d7
+d700ff
+d75f00
+d75f5f
+d75f87
+d75faf
+d75fd7
+d75fff
+d78700
+d7875f
+d78787
+d787af
+d787d7
+d787ff
+d7af00
+d7af5f
+d7af87
+d7afaf
+d7afd7
+d7afff
+d7d700
+d7d75f
+d7d787
+d7d7af
+d7d7d7
+d7d7ff
+d7ff00
+d7ff5f
+d7ff87
+d7ffaf
+d7ffd7
+d7ffff
+ff0000
+ff005f
+ff0087
+ff00af
+ff00d7
+ff00ff
+ff5f00
+ff5f5f
+ff5f87
+ff5faf
+ff5fd7
+ff5fff
+ff8700
+ff875f
+ff8787
+ff87af
+ff87d7
+ff87ff
+ffaf00
+ffaf5f
+ffaf87
+ffafaf
+ffafd7
+ffafff
+ffd700
+ffd75f
+ffd787
+ffd7af
+ffd7d7
+ffd7ff
+ffff00
+ffff5f
+ffff87
+ffffaf
+ffffd7
+ffffff
+080808
+121212
+1c1c1c
+262626
+303030
+3a3a3a
+444444
+4e4e4e
+585858
+626262
+6c6c6c
+767676
+808080
+8a8a8a
+949494
+9e9e9e
+a8a8a8
+b2b2b2
+bcbcbc
+c6c6c6
+d0d0d0
+dadada
+e4e4e4
+eeeeee

resources/dialog.glade

@@ -0,0 +1,184 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.22.1 -->
+<interface>
+  <requires lib="gtk+" version="3.20"/>
+  <object class="GtkAdjustment" id="adjustment1">
+    <property name="lower">1</property>
+    <property name="upper">4000</property>
+    <property name="value">1000</property>
+    <property name="step_increment">10</property>
+    <property name="page_increment">1000</property>
+  </object>
+  <object class="GtkBox" id="dialog-box">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="orientation">vertical</property>
+    <child>
+      <object class="GtkRadioButton" id="latex-radio">
+        <property name="label" translatable="yes">Generate LaTeX/TikZ output</property>
+        <property name="visible">True</property>
+        <property name="can_focus">True</property>
+        <property name="receives_default">False</property>
+        <property name="active">True</property>
+        <property name="draw_indicator">True</property>
+      </object>
+      <packing>
+        <property name="expand">False</property>
+        <property name="fill">True</property>
+        <property name="position">0</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkRadioButton" id="cairo-pdf-radio">
+        <property name="label" translatable="yes">Render PDF using Cairographics</property>
+        <property name="visible">True</property>
+        <property name="can_focus">True</property>
+        <property name="receives_default">False</property>
+        <property name="draw_indicator">True</property>
+        <property name="group">latex-radio</property>
+      </object>
+      <packing>
+        <property name="expand">False</property>
+        <property name="fill">True</property>
+        <property name="position">1</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkRadioButton" id="cairo-svg-radio">
+        <property name="label" translatable="yes">Render SVG using Cairographics (too buggy at the moment)</property>
+        <property name="visible">True</property>
+        <property name="sensitive">False</property>
+        <property name="can_focus">True</property>
+        <property name="receives_default">False</property>
+        <property name="draw_indicator">True</property>
+        <property name="group">latex-radio</property>
+      </object>
+      <packing>
+        <property name="expand">False</property>
+        <property name="fill">True</property>
+        <property name="position">2</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkScale" id="dialog-scale">
+        <property name="visible">True</property>
+        <property name="can_focus">True</property>
+        <property name="adjustment">adjustment1</property>
+        <property name="fill_level">4000</property>
+        <property name="round_digits">0</property>
+        <property name="digits">0</property>
+      </object>
+      <packing>
+        <property name="expand">False</property>
+        <property name="fill">True</property>
+        <property name="position">3</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkCheckButton" id="standalone-check">
+        <property name="label" translatable="yes">Configure LaTeX as standalone document</property>
+        <property name="visible">True</property>
+        <property name="can_focus">True</property>
+        <property name="receives_default">False</property>
+        <property name="draw_indicator">True</property>
+      </object>
+      <packing>
+        <property name="expand">False</property>
+        <property name="fill">True</property>
+        <property name="position">4</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkCheckButton" id="layer-check">
+        <property name="label" translatable="yes">Generate PDF Layers</property>
+        <property name="visible">True</property>
+        <property name="can_focus">True</property>
+        <property name="receives_default">False</property>
+        <property name="draw_indicator">True</property>
+      </object>
+      <packing>
+        <property name="expand">False</property>
+        <property name="fill">True</property>
+        <property name="position">5</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkDrawingArea" id="shape-drawer">
+        <property name="height_request">200</property>
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+      </object>
+      <packing>
+        <property name="expand">True</property>
+        <property name="fill">True</property>
+        <property name="position">6</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkBox">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <child>
+          <object class="GtkLabel" id="x-label">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+          </object>
+          <packing>
+            <property name="expand">True</property>
+            <property name="fill">True</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkLabel" id="y-label">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+          </object>
+          <packing>
+            <property name="expand">True</property>
+            <property name="fill">True</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+      <packing>
+        <property name="expand">False</property>
+        <property name="fill">True</property>
+        <property name="position">7</property>
+      </packing>
+    </child>
+    <child>
+      <object class="GtkBox">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <child>
+          <object class="GtkLabel" id="x-output-label">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+          </object>
+          <packing>
+            <property name="expand">True</property>
+            <property name="fill">True</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkLabel" id="y-output-label">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+          </object>
+          <packing>
+            <property name="expand">True</property>
+            <property name="fill">True</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+      <packing>
+        <property name="expand">False</property>
+        <property name="fill">True</property>
+        <property name="position">8</property>
+      </packing>
+    </child>
+  </object>
+</interface>

resources/main.glade

@@ -0,0 +1,331 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.22.1 -->
+<interface>
+  <requires lib="gtk+" version="3.20"/>
+  <object class="GtkImage" id="auto-name-img">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="stock">gtk-edit</property>
+  </object>
+  <object class="GtkImage" id="color-img">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="stock">gtk-select-color</property>
+  </object>
+  <object class="GtkImage" id="load-mapping-img">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="stock">gtk-open</property>
+  </object>
+  <object class="GtkImage" id="save-mapping-img">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="tooltip_text" translatable="yes">Save the current layer configuration to CSV</property>
+    <property name="stock">gtk-save-as</property>
+  </object>
+  <object class="GtkImage" id="select-all-img">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="stock">gtk-apply</property>
+  </object>
+  <object class="GtkImage" id="sort-down-img">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="stock">gtk-sort-ascending</property>
+  </object>
+  <object class="GtkImage" id="sort-up-img">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="stock">gtk-sort-descending</property>
+  </object>
+  <object class="GtkWindow" id="main-window">
+    <property name="height_request">250</property>
+    <property name="can_focus">False</property>
+    <property name="icon_name">gds-render</property>
+    <child type="titlebar">
+      <object class="GtkHeaderBar" id="header-bar">
+        <property name="name">header</property>
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="title" translatable="yes">GDS-Render</property>
+        <property name="show_close_button">True</property>
+        <child>
+          <object class="GtkButton" id="button-load-gds">
+            <property name="label">gtk-open</property>
+            <property name="visible">True</property>
+            <property name="can_focus">True</property>
+            <property name="receives_default">True</property>
+            <property name="tooltip_text" translatable="yes">Open GDS2 Database</property>
+            <property name="use_stock">True</property>
+            <property name="always_show_image">True</property>
+            <style>
+              <class name="suggested-action"/>
+            </style>
+          </object>
+        </child>
+        <child>
+          <object class="GtkButton" id="button-load-mapping">
+            <property name="label" translatable="yes">Load Mapping</property>
+            <property name="visible">True</property>
+            <property name="sensitive">False</property>
+            <property name="can_focus">True</property>
+            <property name="receives_default">True</property>
+            <property name="tooltip_text" translatable="yes">Load the current layer configuration from CSV</property>
+            <property name="image">load-mapping-img</property>
+            <property name="always_show_image">True</property>
+            <style>
+              <class name="suggested-action"/>
+            </style>
+          </object>
+          <packing>
+            <property name="position">1</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkButton" id="button-save-mapping">
+            <property name="label" translatable="yes">Save Mapping</property>
+            <property name="visible">True</property>
+            <property name="sensitive">False</property>
+            <property name="can_focus">True</property>
+            <property name="receives_default">True</property>
+            <property name="image">save-mapping-img</property>
+            <property name="always_show_image">True</property>
+            <style>
+              <class name="suggested-action"/>
+            </style>
+          </object>
+          <packing>
+            <property name="position">2</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkButton" id="convert-button">
+            <property name="label">gtk-convert</property>
+            <property name="name">button-convert</property>
+            <property name="visible">True</property>
+            <property name="sensitive">False</property>
+            <property name="can_focus">True</property>
+            <property name="receives_default">True</property>
+            <property name="tooltip_text" translatable="yes">Convert selected cell</property>
+            <property name="use_stock">True</property>
+            <property name="always_show_image">True</property>
+            <style>
+              <class name="suggested-action"/>
+            </style>
+          </object>
+          <packing>
+            <property name="position">3</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+    <child>
+      <object class="GtkBox">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="orientation">vertical</property>
+        <child>
+          <object class="GtkBox">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <child>
+              <object class="GtkBox">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="orientation">vertical</property>
+                <child>
+                  <object class="GtkSearchEntry" id="cell-search">
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="primary_icon_name">edit-find-symbolic</property>
+                    <property name="primary_icon_activatable">False</property>
+                    <property name="primary_icon_sensitive">False</property>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="position">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkScrolledWindow">
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="hscrollbar_policy">never</property>
+                    <property name="shadow_type">in</property>
+                    <child>
+                      <object class="GtkTreeView" id="cell-tree">
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="enable_search">False</property>
+                        <property name="enable_grid_lines">both</property>
+                        <child internal-child="selection">
+                          <object class="GtkTreeSelection"/>
+                        </child>
+                      </object>
+                    </child>
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                    <property name="fill">True</property>
+                    <property name="position">1</property>
+                  </packing>
+                </child>
+              </object>
+              <packing>
+                <property name="expand">True</property>
+                <property name="fill">True</property>
+                <property name="position">0</property>
+              </packing>
+            </child>
+            <child>
+              <object class="GtkBox">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="orientation">vertical</property>
+                <child>
+                  <object class="GtkBox">
+                    <property name="visible">True</property>
+                    <property name="can_focus">False</property>
+                    <child>
+                      <object class="GtkButton" id="button-up-sort">
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="receives_default">True</property>
+                        <property name="tooltip_text" translatable="yes">Sort layers ascending</property>
+                        <property name="image">sort-up-img</property>
+                        <property name="always_show_image">True</property>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">0</property>
+                      </packing>
+                    </child>
+                    <child>
+                      <object class="GtkButton" id="button-down-sort">
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="receives_default">True</property>
+                        <property name="tooltip_text" translatable="yes">Sort layers descending</property>
+                        <property name="image">sort-down-img</property>
+                        <property name="always_show_image">True</property>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">1</property>
+                      </packing>
+                    </child>
+                    <child>
+                      <object class="GtkButton" id="auto-color-button">
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="receives_default">True</property>
+                        <property name="tooltip_text" translatable="yes">Automatically color layers</property>
+                        <property name="image">color-img</property>
+                        <property name="always_show_image">True</property>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">2</property>
+                      </packing>
+                    </child>
+                    <child>
+                      <object class="GtkButton" id="button-select-all">
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="receives_default">True</property>
+                        <property name="tooltip_text" translatable="yes">Select all layers for export</property>
+                        <property name="image">select-all-img</property>
+                        <property name="always_show_image">True</property>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">3</property>
+                      </packing>
+                    </child>
+                    <child>
+                      <object class="GtkButton" id="button-auto-name">
+                        <property name="visible">True</property>
+                        <property name="can_focus">True</property>
+                        <property name="receives_default">True</property>
+                        <property name="tooltip_text" translatable="yes">Automatically name layers</property>
+                        <property name="image">auto-name-img</property>
+                        <property name="always_show_image">True</property>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">4</property>
+                      </packing>
+                    </child>
+                  </object>
+                  <packing>
+                    <property name="expand">False</property>
+                    <property name="fill">False</property>
+                    <property name="position">0</property>
+                  </packing>
+                </child>
+                <child>
+                  <object class="GtkScrolledWindow">
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="margin_top">1</property>
+                    <property name="hscrollbar_policy">never</property>
+                    <property name="shadow_type">in</property>
+                    <child>
+                      <object class="GtkViewport">
+                        <property name="visible">True</property>
+                        <property name="can_focus">False</property>
+                        <child>
+                          <object class="GtkListBox" id="layer-list">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="selection_mode">none</property>
+                          </object>
+                        </child>
+                      </object>
+                    </child>
+                  </object>
+                  <packing>
+                    <property name="expand">True</property>
+                    <property name="fill">True</property>
+                    <property name="position">1</property>
+                  </packing>
+                </child>
+              </object>
+              <packing>
+                <property name="expand">True</property>
+                <property name="fill">True</property>
+                <property name="position">1</property>
+              </packing>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">True</property>
+            <property name="fill">True</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkBox" id="activity-bar">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <property name="orientation">vertical</property>
+            <child>
+              <placeholder/>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">False</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>

resources/resources.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gresources>
+	<gresource prefix="/gui">
+		<file compressed="true">main.glade</file>
+		<file compressed="true">about.glade</file>
+		<file>layer-widget.glade</file>
+		<file>dialog.glade</file>
+	</gresource>
+	<gresource prefix="/data">
+		<file compressed="true">color-palette.txt</file>
+	</gresource>
+	<gresource prefix="/images">
+		<file compressed="true" alias="logo.svg">../icon/gds-render.svg</file>
+	</gresource>
+</gresources>
+
+

test/CMakeLists.txt

@@ -0,0 +1,41 @@
+project(gds-render-test)
+
+add_custom_target(test "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}" "-r compact" "-s" DEPENDS ${PROJECT_NAME})
+
+if(NOT WIN32)
+  string(ASCII 27 Esc)
+  set(ColorReset "${Esc}[m")
+  set(ColorBold  "${Esc}[1m")
+  set(Red         "${Esc}[31m")
+  set(Green       "${Esc}[32m")
+  set(Yellow      "${Esc}[33m")
+  set(Blue        "${Esc}[34m")
+  set(Magenta     "${Esc}[35m")
+  set(Cyan        "${Esc}[36m")
+  set(White       "${Esc}[37m")
+  set(BoldRed     "${Esc}[1;31m")
+  set(BoldGreen   "${Esc}[1;32m")
+  set(BoldYellow  "${Esc}[1;33m")
+  set(BoldBlue    "${Esc}[1;34m")
+  set(BoldMagenta "${Esc}[1;35m")
+  set(BoldCyan    "${Esc}[1;36m")
+  set(BoldWhite   "${Esc}[1;37m")
+endif()
+
+cmake_minimum_required(VERSION 2.8)
+find_package(PkgConfig REQUIRED)
+
+include_directories("${CMAKE_CURRENT_SOURCE_DIR}/catch-framework")
+
+aux_source_directory("geometric" GEOMETRIC_TEST_SOURCES)
+set(TEST_SOURCES
+	${GEOMETRIC_TEST_SOURCES}
+)
+
+set(DUT_SOURCES
+	"../geometric/vector-operations.c"
+)
+
+add_executable(${PROJECT_NAME} EXCLUDE_FROM_ALL "test-main.cpp" ${TEST_SOURCES} ${DUT_SOURCES})
+target_link_libraries(${PROJECT_NAME} ${GLIB_LDFLAGS} ${GTK3_LDFLAGS} ${CAIRO_LDFLAGS} m version ${CMAKE_DL_LIBS})
+