Fix #17: Reference loop detection fix. This will be part of v1.0-1

Code wasn't unnecessary. Oops.

This reverts commit aa413732f1.

.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 +1,3 @@
+[submodule "c-style-checker"]
+	path = c-style-checker
+	url = https://git.shimatta.de/mhu/c-style-checker

AUR/PKGBUILD

@@ -0,0 +1,37 @@
+	# Maintainer: Mario Hüttel <mario (dot) huettel (!) gmx (dot) net>
+
+pkgname=gds-render
+pkgver=20180725.001
+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}/${pkgname}-git"
+	echo "$_date.$(git rev-list --count master).$(git rev-parse --short master)"
+}
+
+build () {
+	cd "$srcdir/$pkgname-git"
+	cmake .
+	make
+}
+
+package () {
+	cd "$srcdir/$pkgname-git"
+	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"
+}

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

@@ -1,36 +1,46 @@
+project(gds-render)
+
 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)
-
-project(gds-render)
+pkg_check_modules(CAIRO REQUIRED cairo)
 
 add_subdirectory(glade)
+add_subdirectory(doxygen)
+add_subdirectory(version)
 
-include_directories(${GLIB_INCLUDE_DIRS} ${GTK3_INCLUDE_DIRS})
-link_directories(${GLIB_LINK_DIRS} ${GTK3_LINK_DIRS})
+include_directories(${GLIB_INCLUDE_DIRS} ${GTK3_INCLUDE_DIRS} ${CAIRO_INCLUDE_DIRS} ${CMAKE_CURRENT_SOURCE_DIR}/include)
+link_directories(${GLIB_LINK_DIRS} ${GTK3_LINK_DIRS} ${CAIRO_LINK_DIRS})
 add_definitions(${GLIB2_CFLAGS_OTHER})
 
-
-aux_source_directory("layer-widget" LAYER_SOURCES)
+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)
-set(SOURCE "main.c" "layer-selector.c")
-
+aux_source_directory("gds-utils" GDS_SOURCES)
+aux_source_directory("latex-renderer" LATEX_SOURCES)
+aux_source_directory("cairo-renderer" CAIRO_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" "external-renderer.c")
 
 set(SOURCE
   ${SOURCE}
   ${LAYER_SOURCES}
   ${RENDERER_SOURCES}
-  ${PARSER_SOURCES}
+  ${GDS_SOURCES}
   ${LATEX_SOURCES}
+  ${CAIRO_SOURCES}
+  ${GEOMETRIC_SOURCES}
+  ${LAYER_SELECTOR_SOURCES}
 )
 
 add_compile_options(-Wall)
 
 add_executable(${PROJECT_NAME} ${SOURCE} ${CMAKE_CURRENT_BINARY_DIR}/glade/resources.c)
 add_dependencies(${PROJECT_NAME} glib-resources)
+add_dependencies(${PROJECT_NAME} version)
 SET_SOURCE_FILES_PROPERTIES(${CMAKE_CURRENT_BINARY_DIR}/glade/resources.c PROPERTIES GENERATED 1)
-target_link_libraries(${PROJECT_NAME} ${GLIB_LDFLAGS} ${GTK3_LDFLAGS} m)
+target_link_libraries(${PROJECT_NAME} ${GLIB_LDFLAGS} ${GTK3_LDFLAGS} ${CAIRO_LDFLAGS} m version ${CMAKE_DL_LIBS})
+install (TARGETS ${PROJECT_NAME} DESTINATION bin)
 
+add_custom_target(documentation DEPENDS doxygen)

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-renderer/cairo-output.c

@@ -0,0 +1,316 @@
+/*
+ * 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-output.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 <gds-render/cairo-renderer/cairo-output.h>
+
+/**
+ * @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 Rotattion 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;
+		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_vector_file(struct gds_cell *cell, GList *layer_infos, char *pdf_file, char *svg_file, double scale)
+{
+	cairo_surface_t *pdf_surface, *svg_surface;
+	cairo_t *pdf_cr, *svg_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;
+
+	if (pdf_file == NULL && svg_file == NULL) {
+		/* No output specified */
+		return;
+	}
+
+	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%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;
+
+		if (linfo->layer >= MAX_LAYERS) {
+			printf("Layer outside of Spec.\n");
+			continue;
+		}
+
+		if (pdf_file) {
+			cairo_set_source_surface(pdf_cr, layers[linfo->layer].rec, -xmin, -ymin);
+			cairo_paint_with_alpha(pdf_cr, linfo->color.alpha);
+		}
+
+		if (svg_file) {
+			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");
+}
+
+/** @} */

command-line.c

@@ -0,0 +1,204 @@
+/*
+ * 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 <gds-render/command-line.h>
+#include <gds-render/gds-utils/gds-parser.h>
+#include <gds-render/layer/mapping-parser.h>
+#include <gds-render/layer/layer-info.h>
+#include <gds-render/cairo-renderer/cairo-output.h>
+#include <gds-render/latex-renderer/latex-output.h>
+#include <gds-render/external-renderer.h>
+#include <gds-render/gds-utils/gds-tree-checker.h>
+
+/**
+ * @brief Delete layer_info and free nem element.
+ *
+ * Like delete_layer_info_struct() but also frees layer_info::name
+ * @param info
+ * @warning This function must not be used if the layer_info::name field references the internal storage strings if e.g. an entry field
+ */
+static void delete_layer_info_with_name(struct layer_info *info)
+{
+	if (info) {
+		if (info->name)
+			g_free(info->name);
+		free(info);
+	}
+}
+
+void command_line_convert_gds(char *gds_name, char *pdf_name, char *tex_name, gboolean pdf, gboolean tex,
+			      char *layer_file, char *cell_name, double scale, gboolean pdf_layers,
+			      gboolean pdf_standalone, gboolean svg, char *svg_name, char *so_name, char *so_out_file)
+{
+	GList *libs = NULL;
+	FILE *tex_file;
+	int res;
+	GFile *file;
+	int i;
+	GFileInputStream *stream;
+	GDataInputStream *dstream;
+	gboolean layer_export;
+	GdkRGBA layer_color;
+	int layer;
+	char *layer_name;
+	GList *layer_info_list = NULL;
+	GList *cell_list;
+	struct layer_info *linfo_temp;
+	struct gds_library *first_lib;
+	struct gds_cell *toplevel_cell = NULL, *temp_cell;
+
+
+	/* Check if parameters are valid */
+	if (!gds_name || (!pdf_name && pdf)  || (!tex_name && tex) || !layer_file || !cell_name) {
+		printf("Probably missing argument. Check --help option\n");
+		return;
+	}
+
+	/* Load GDS */
+	clear_lib_list(&libs);
+	res = parse_gds_from_file(gds_name, &libs);
+	if (res)
+		goto ret_destroy_library_list;
+
+	file = g_file_new_for_path(layer_file);
+	stream = g_file_read(file, NULL, NULL);
+
+	if (!stream) {
+		printf("Layer mapping not readable!\n");
+		goto ret_destroy_file;
+	}
+	dstream = g_data_input_stream_new(G_INPUT_STREAM(stream));
+	i = 0;
+	do {
+		res = mapping_parser_load_line(dstream, &layer_export, &layer_name, &layer, &layer_color);
+		if (res == 0) {
+			if (!layer_export)
+				continue;
+			linfo_temp = (struct layer_info *)malloc(sizeof(struct layer_info));
+			if (!linfo_temp) {
+				printf("Out of memory\n");
+				goto ret_clear_layer_list;
+			}
+			linfo_temp->color.alpha = layer_color.alpha;
+			linfo_temp->color.red = layer_color.red;
+			linfo_temp->color.green = layer_color.green;
+			linfo_temp->color.blue = layer_color.blue;
+			linfo_temp->name = layer_name;
+			linfo_temp->stacked_position = i++;
+			linfo_temp->layer = layer;
+			layer_info_list = g_list_append(layer_info_list, (gpointer)linfo_temp);
+		}
+	} while(res >= 0);
+
+
+	/* find_cell in first library. */
+	if (!libs)
+		goto ret_clear_layer_list;
+
+	first_lib = (struct gds_library *)libs->data;
+	if (!first_lib) {
+		fprintf(stderr, "No library in library list. This should not happen.\n");
+		goto ret_clear_layer_list;
+	}
+
+	for (cell_list = first_lib->cells; cell_list != NULL; cell_list = g_list_next(cell_list)) {
+		temp_cell = (struct gds_cell *)cell_list->data;
+		if (!strcmp(temp_cell->name, cell_name)) {
+			toplevel_cell = temp_cell;
+			break;
+		}
+	}
+
+	if (!toplevel_cell) {
+		printf("Couldn't find cell in first library!\n");
+		goto ret_clear_layer_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_clear_layer_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_clear_layer_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.
+	 */
+
+	/* Render outputs */
+	if (pdf == TRUE || svg == TRUE) {
+		cairo_render_cell_to_vector_file(toplevel_cell, layer_info_list, (pdf == TRUE ? pdf_name : NULL),
+						 (svg == TRUE ? svg_name : NULL), scale);
+	}
+
+	if (tex == TRUE) {
+		tex_file = fopen(tex_name, "w");
+		if (!tex_file)
+			goto ret_clear_layer_list;
+		latex_render_cell_to_code(toplevel_cell, layer_info_list, tex_file, scale, pdf_layers, pdf_standalone);
+		fclose(tex_file);
+	}
+
+	if (so_name && so_out_file) {
+		if (strlen(so_name) == 0 || strlen(so_out_file) == 0)
+			goto ret_clear_layer_list;
+
+		/* Render output using external renderer */
+		printf("Invoking external renderer!\n");
+		external_renderer_render_cell(toplevel_cell, layer_info_list, so_out_file, so_name);
+		printf("External renderer finished!\n");
+	}
+
+ret_clear_layer_list:
+	g_list_free_full(layer_info_list, (GDestroyNotify)delete_layer_info_with_name);
+
+	g_object_unref(dstream);
+	g_object_unref(stream);
+ret_destroy_file:
+	g_object_unref(file);
+	/* Delete all allocated libraries */
+ret_destroy_library_list:
+	clear_lib_list(&libs);
+}
+
+/** @} */

doxygen/CMakeLists.txt

@@ -0,0 +1,10 @@
+find_package(Doxygen)
+
+if (DOXYGEN_FOUND)
+ 	add_custom_target(doxygen
+		COMMAND ./build-doxygen.sh "${PROJECT_BINARY_DIR}"
+		WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+		COMMENT "Generating documentation with Doxygen")
+else (DOXYGEN_FOUND)
+  message("Doxygen need to be installed to generate the doxygen documentation")
+endif (DOXYGEN_FOUND)

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 renderers
+ */

doxygen/command-line.dox

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

doxygen/compilation.dox

@@ -0,0 +1,67 @@
+/**
+
+@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   |
+| ------------- | ---------- | ------ |
+| 1.16.0-2      | 2.60.0-1   | 3.24.7 |
+
+@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 <Path to gds-render root>
+@endcode
+
+Cmake will check the dependencies. Once cmake has finished. Type
+
+@code
+ make
+@endcode
+
+in order 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 Compiler Warnings
+
+The compiler will throw the following warnings. Compiled with GCC 8.2.1.
+
+| Warning | Assessment |
+| ------- | ---------- |
+| warning: ‘calculate_path_miter_points’ defined but not used [-Wunused-function] | Ignore. Function will be used in later versions. |
+*/

doxygen/external-renderer.dox

@@ -0,0 +1,4 @@
+/**
+ * @defgroup external-renderer External Shared Object Renderer
+ * @ingroup renderers
+ */

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 +1,4 @@
+/**
+ * @defgroup LaTeX-Renderer LaTeX/TikZ Renderer 
+ * @ingroup renderers
+ */

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/renderers.dox

@@ -0,0 +1,9 @@
+/**
+ * @defgroup renderers Output Renderers
+ * 
+ * The renderers are used to convert the cell structures read from the GDS layout file
+ * into different output formats.
+ * 
+ * Currently the renders are statically implemented without the use of GObjects.
+ * This will probably change in future releases in order to make it easier to integrate new rendering methods.
+ */

doxygen/usage.dox

@@ -0,0 +1,34 @@
+/**
+@page usage Usage
+@section cmd Command Line Interface
+To use the application on the command line check 'gds-render `--`help'.
+
+Application Options:
+-  -t, `--`tikz                         Output TikZ code
+-  -p, `--`pdf                          Output PDF document
+-  -s, `--`scale=SCALE                Divide output coordinates by SCALE
+-  -o, `--`tex-output=PATH              Optional path for TeX file
+-  -O, `--`pdf-output=PATH              Optional path for PDF file
+-  -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
+-  -e, `--`external-lib-output=PATH     Output path for external render library
+-  `--`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 the cell is green; so everything is okay. 
+
+*/

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 path-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 doxumentation 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
+ */

external-renderer.c

@@ -0,0 +1,72 @@
+/*
+ * 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 external-renderer
+ * @{
+ */
+
+#include <dlfcn.h>
+#include <stdio.h>
+
+#include <gds-render/external-renderer.h>
+
+int external_renderer_render_cell(struct gds_cell *toplevel_cell, GList *layer_info_list,
+				  char *output_file, char *so_path)
+{
+	int (*so_render_func)(struct gds_cell *, GList *, char *) = NULL;
+	void *so_handle = NULL;
+	char *error_msg;
+	int ret = 0;
+
+	/* Check parameter sanity */
+	if (!output_file || !so_path || !toplevel_cell || !layer_info_list)
+		return -3000;
+
+	/* Load shared object */
+	so_handle = dlopen(so_path, RTLD_LAZY);
+	if (!so_handle) {
+		printf("Could not load external library '%s'\nDetailed error is:\n%s\n", so_path, dlerror());
+		return -2000;
+	}
+
+	/* Load symbol from library */
+	so_render_func = (int (*)(struct gds_cell *, GList *, char *))dlsym(so_handle, EXTERNAL_LIBRARY_FUNCTION);
+	error_msg = dlerror();
+	if (error_msg != NULL) {
+		printf("Rendering function not found in library:\n%s\n", error_msg);
+		goto ret_close_so_handle;
+	}
+
+	/* Execute */
+	if (so_render_func)
+		so_render_func(toplevel_cell, layer_info_list, output_file);
+
+ret_close_so_handle:
+	dlclose(so_handle);
+	return ret;
+}
+
+/** @} */

gds-parser/gds-types.h

@@ -1,61 +0,0 @@
-#ifndef __GDS_TYPES_H__
-#define __GDS_TYPES_H__
-
-#include <stdint.h>
-#include <glib.h>
-
-#define CELL_NAME_MAX (100)
-
-enum graphics_type {GRAPHIC_PATH = 0, GRAPHIC_POLYGON = 1};
-enum path_type {PATH_FLUSH = 0, PATH_ROUNDED = 1, PATH_SQUARED = 2};
-
-struct gds_time_field {
-		uint16_t year;
-		uint16_t month;
-		uint16_t day;
-		uint16_t hour;
-		uint16_t minute;
-		uint16_t second;
-};
-
-struct gds_point {
-		int x;
-		int y;
-};
-
-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 +1,559 @@
+/*
+ * 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 <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/tree-renderer/tree-store.h>
+#include <gds-render/tree-renderer/lib-cell-renderer.h>
+#include <gds-render/latex-renderer/latex-output.h>
+#include <gds-render/cairo-renderer/cairo-output.h>
+#include <gds-render/widgets/conv-settings-dialog.h>
+#include <gds-render/geometric/cell-geometrics.h>
+#include <gds-render/version.h>
+
+enum gds_render_gui_signal_sig_ids {SIGNAL_WINDOW_CLOSED = 0, SIGNAL_COUNT};
+
+static guint gds_render_gui_signals[SIGNAL_COUNT];
+
+struct _GdsRenderGui {
+	/* Parent GObject */
+	GObject parent;
+
+	/* Custom fields */
+	GtkWindow *main_window;
+	GtkWidget *convert_button;
+	GtkTreeStore *cell_tree_store;
+	GtkWidget *cell_search_entry;
+	LayerSelector *layer_selector;
+	GtkTreeView *cell_tree_view;
+	GList *gds_libraries;
+	struct render_settings render_dialog_settings;
+};
+
+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;
+
+	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 generate string from gds_time_field
+ * @param date Date to convert
+ * @return String with date
+ */
+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;
+}
+
+/**
+ * @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;
+	GString *mod_date;
+	GString *acc_date;
+	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);
+
+		/* 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(self->cell_tree_store, &libiter,
+				   CELL_SEL_LIBRARY, gds_lib,
+				   CELL_SEL_MODDATE, mod_date->str,
+				   CELL_SEL_ACCESSDATE, acc_date->str,
+				   -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);
+		/* 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(self->cell_tree_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);
+
+			/* 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_MODDATE, mod_date->str,
+					   CELL_SEL_ACCESSDATE, acc_date->str,
+					   CELL_SEL_CELL_ERROR_STATE, cell_error_level,
+					   -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 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);
+}
+
+/**
+ * @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;
+	GList *layer_list;
+	struct gds_cell *cell_to_render;
+	FILE *output_file;
+	GtkWidget *dialog;
+	RendererSettingsDialog *settings;
+	GtkFileFilter *filter;
+	gint res;
+	char *file_name;
+	union bounding_box cell_box;
+	unsigned int height, width;
+	struct render_settings *sett;
+
+	self = RENDERER_GUI(user);
+
+	if (!self)
+		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_list = 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:
+			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_SVG:
+		case RENDERER_CAIROGRAPHICS_PDF:
+			cairo_render_cell_to_vector_file(cell_to_render, layer_list,
+							 (sett->renderer == RENDERER_CAIROGRAPHICS_PDF
+							  ? file_name
+							  : NULL),
+							 (sett->renderer == RENDERER_CAIROGRAPHICS_SVG
+							  ? file_name
+							  : NULL),
+							 sett->scale);
+			break;
+		}
+		g_free(file_name);
+
+	} else {
+		gtk_widget_destroy(dialog);
+	}
+ret_layer_destroy:
+	g_list_free_full(layer_list, (GDestroyNotify)layer_info_delete_struct);
+}
+
+/**
+ * @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 */
+		gtk_widget_set_sensitive(self->convert_button, TRUE);
+	} else {
+		gtk_widget_set_sensitive(self->convert_button, FALSE);
+	}
+}
+
+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_search_entry);
+
+	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;
+}
+
+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;
+	struct tree_stores *cell_selector_stores;
+	GtkWidget *sort_up_button;
+	GtkWidget *sort_down_button;
+
+	main_builder = gtk_builder_new_from_resource("/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"));
+
+	cell_selector_stores = setup_cell_selector(self->cell_tree_view, GTK_ENTRY(self->cell_search_entry));
+
+	self->cell_tree_store = cell_selector_stores->base_store;
+
+	self->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)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));
+
+
+	/* 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 */
+	layer_selector_set_load_mapping_button(self->layer_selector,
+					       GTK_WIDGET(gtk_builder_get_object(main_builder, "button-load-mapping")),
+					       self->main_window);
+	layer_selector_set_save_mapping_button(self->layer_selector, GTK_WIDGET(gtk_builder_get_object(main_builder, "button-save-mapping")),
+					       self->main_window);
+
+	/* Connect delete-event */
+	g_signal_connect(GTK_WIDGET(self->main_window), "delete-event",
+			 G_CALLBACK(on_window_close), self);
+
+	g_object_unref(main_builder);
+
+	/* 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;
+
+
+	/* Reference all objects referenced by this object */
+	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);
+	g_object_ref(self->cell_tree_store);
+	g_object_ref(self->cell_search_entry);
+}
+
+GdsRenderGui *gds_render_gui_new()
+{
+	return RENDERER_GUI(g_object_new(RENDERER_TYPE_GUI, NULL));
+}
+
+/** @} */

gds-utils/gds-parser.c

@@ -17,27 +17,47 @@
  * 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>
 
-#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
+	#define GDS_INF(fmt, ...) printf(fmt, ##__VA_ARGS__) /**< @brief standard printf. But can be disabled in code */
+#else
+	#define GDS_INF(fmt, ...)
+#endif
+enum gds_record {
 	INVALID = 0x0000,
 	HEADER = 0x0002,
 	BGNLIB = 0x0102,
@@ -62,6 +82,13 @@ enum record {
 	PATHTYPE = 0x2102
 };
 
+/**
+ * @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)
 {
@@ -72,7 +99,7 @@ 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;
@@ -80,11 +107,16 @@ 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 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;
@@ -125,6 +157,11 @@ 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;
@@ -141,6 +178,11 @@ 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) {
@@ -151,6 +193,11 @@ static int16_t gds_convert_signed_int16(const char *data)
 			(((int16_t)(data[1]) & 0xFF) <<  0));
 }
 
+/**
+ * @brief Convert GDS UINT16 String to uint16
+ * @param data Buffer containing the uint16
+ * @return result
+ */
 static uint16_t gds_convert_unsigend_int16(const char *data)
 {
 	if (!data) {
@@ -161,6 +208,12 @@ 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;
@@ -169,7 +222,7 @@ 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;
@@ -179,6 +232,13 @@ static GList *append_library(GList *curr_list, struct gds_library **library_ptr)
 	return g_list_append(curr_list, lib);
 }
 
+/**
+ * @brief Append 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 GList *append_graphics(GList *curr_list, enum graphics_type type,
 			      struct gds_graphics **graphics_ptr)
 {
@@ -201,6 +261,13 @@ static GList *append_graphics(GList *curr_list, enum graphics_type type,
 	return g_list_append(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;
@@ -214,6 +281,14 @@ 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;
@@ -223,6 +298,9 @@ 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 */
@@ -232,6 +310,14 @@ 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;
@@ -253,6 +339,13 @@ 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)
 {
@@ -264,18 +357,26 @@ 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)
 {
@@ -286,14 +387,14 @@ 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);
@@ -301,15 +402,21 @@ static int name_cell(struct gds_cell *cell, unsigned int bytes,
 	return 0;
 }
 
-
-void parse_reference_list(gpointer gcell_ref, gpointer glibrary)
+/**
+ * @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;
 	struct gds_library *lib = (struct gds_library *)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) {
@@ -317,37 +424,58 @@ 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");
 }
 
-void scan_cell_reference_dependencies(gpointer gcell, gpointer 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);
 
 }
 
-void scan_library_references(gpointer library_list_item, gpointer user)
+/**
+ * @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);
 }
 
-void gds_parse_date(const char *buffer, int length, struct gds_time_field *mod_date, struct gds_time_field *access_date)
+/**
+ * @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)
 {
 
 	struct gds_time_field *temp_date;
@@ -389,7 +517,7 @@ 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;
@@ -465,7 +593,7 @@ 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) {
@@ -481,16 +609,24 @@ 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) {
@@ -505,27 +641,28 @@ 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 BOX:
 		case BOUNDARY:
 			if (current_cell == NULL) {
-				GDS_ERROR("Boundary outside of cell");
+				GDS_ERROR("Boundary/Box outside of cell");
 				run = -3;
 				break;
 			}
 			current_cell->graphic_objs = append_graphics(current_cell->graphic_objs,
-								     GRAPHIC_POLYGON, &current_graphics);
+								     (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\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;
 			}
@@ -537,7 +674,7 @@ 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) {
@@ -552,16 +689,16 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 				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;
 			}
 			break;
@@ -575,6 +712,7 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 			}
 
 			break;
+
 		case MAG:
 			break;
 		case ANGLE:
@@ -585,6 +723,8 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 			break;
 		case PATHTYPE:
 			break;
+		case UNITS:
+			break;
 		default:
 			//GDS_WARN("Record: %04x, len: %u", (unsigned int)rec_type, (unsigned int)rec_data_length);
 			break;
@@ -592,7 +732,7 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 
 
 		/* 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);
 
@@ -606,7 +746,6 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 		switch (rec_type) {
 
 		case HEADER:
-		case UNITS:
 		case ENDLIB:
 		case ENDSTR:
 		case BOUNDARY:
@@ -617,6 +756,20 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 		case INVALID:
 			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);
@@ -625,17 +778,17 @@ 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++) {
@@ -643,7 +796,7 @@ 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);
 
 				}
 			}
@@ -657,7 +810,11 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 			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 {
+				GDS_ERROR("reference name set outside of cell reference.\n");
+			}
 			break;
 		case WIDTH:
 			if (!current_graphics) {
@@ -674,7 +831,7 @@ 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 MAG:
 			if (rec_data_length != 8) {
@@ -687,7 +844,7 @@ 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);
 			}
 			break;
 		case ANGLE:
@@ -701,7 +858,7 @@ int parse_gds_from_file(const char *filename, GList **library_list)
 			}
 			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);
 			}
 			break;
 		case PATHTYPE:
@@ -710,8 +867,8 @@ 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");
 			}
@@ -723,7 +880,6 @@ 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);
@@ -736,31 +892,62 @@ 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);
@@ -768,9 +955,15 @@ 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 +1,207 @@
+/*
+ * 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 cehcking 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 <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);
+		}
+
+		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 +1,204 @@
+/*
+ * 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_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_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;
+}
+
+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_calculate_path_box(GList *vertices, double thickness,
+					conv_generic_to_vector_2d_t conv_func, union bounding_box *box)
+{
+	GList *vertex_iterator;
+	struct vector_2d pt;
+
+	printf("Warning! Function bounding_box_calculate_path_box not yet implemented correctly!\n");
+
+	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_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);
+}
+
+/**
+ * @brief Apply transformations onto bounding box.
+ * @param scale Scaling factor
+ * @param rotation_deg Roation 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.
+ */
+void bounding_box_apply_transform(double scale, double rotation_deg, bool flip_at_x, union bounding_box *box)
+{
+	int i;
+
+	/* Due to linearity, the order of the operations does not matter.
+	 * flip must be applied before rotation as defined by the GDS format
+	 */
+	for (i = 0; i < 2; i++) {
+		box->vector_array[i].y *= (flip_at_x ? -1 : 1);
+		vector_2d_rotate(&box->vector_array[i], rotation_deg * M_PI / 180);
+		vector_2d_scale(&box->vector_array[i], scale);
+	}
+}
+
+/** @} */

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_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_calculate_path_box(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_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_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 ? -(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);
+
+	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 +1,7 @@
 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}/main.glade
-			 ${CMAKE_CURRENT_SOURCE_DIR}/layer-widget.glade
 		   OUTPUT
 			${CMAKE_CURRENT_BINARY_DIR}/resources.c
 		   COMMAND 

glade/about.glade

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.22.1 -->
+<interface>
+  <requires lib="gtk+" version="3.20"/>
+  <object class="GtkAboutDialog" id="about-dialog">
+    <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="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"/>
+    <property name="license_type">gpl-2-0-only</property>
+    <child>
+      <placeholder/>
+    </child>
+    <child internal-child="vbox">
+      <object class="GtkBox">
+        <property name="can_focus">False</property>
+        <property name="orientation">vertical</property>
+        <property name="spacing">2</property>
+        <child internal-child="action_area">
+          <object class="GtkButtonBox">
+            <property name="can_focus">False</property>
+            <property name="layout_style">end</property>
+            <child>
+              <placeholder/>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">False</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <placeholder/>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>

glade/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>

glade/main.glade

@@ -2,17 +2,26 @@
 <!-- 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>
+  <object class="GtkImage" id="image1">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
+    <property name="stock">gtk-go-up</property>
+  </object>
+  <object class="GtkImage" id="image2">
+    <property name="visible">True</property>
+    <property name="can_focus">False</property>
+    <property name="stock">gtk-go-down</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">
+      <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 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">
@@ -35,7 +44,7 @@
             <property name="can_focus">True</property>
             <property name="receives_default">True</property>
             <style>
-              <class name="destructive-action"/>
+              <class name="suggested-action"/>
             </style>
           </object>
           <packing>
@@ -82,19 +91,48 @@
         <property name="visible">True</property>
         <property name="can_focus">False</property>
         <child>
-          <object class="GtkScrolledWindow">
+          <object class="GtkBox">
             <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="hscrollbar_policy">never</property>
-            <property name="shadow_type">in</property>
+            <property name="can_focus">False</property>
+            <property name="orientation">vertical</property>
             <child>
-              <object class="GtkTreeView" id="cell-tree">
+              <object class="GtkSearchEntry" id="cell-search">
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
-                <child internal-child="selection">
-                  <object class="GtkTreeSelection"/>
+                <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="headers_clickable">False</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>
@@ -104,23 +142,74 @@
           </packing>
         </child>
         <child>
-          <object class="GtkScrolledWindow">
+          <object class="GtkBox">
             <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="hscrollbar_policy">never</property>
-            <property name="shadow_type">in</property>
+            <property name="can_focus">False</property>
+            <property name="orientation">vertical</property>
             <child>
-              <object class="GtkViewport">
+              <object class="GtkBox">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <child>
-                  <object class="GtkListBox" id="layer-list">
+                  <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="image">image1</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="image">image2</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>
+              </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="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>
-                    <property name="selection_mode">none</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>

glade/resources.xml

@@ -2,7 +2,10 @@
 <gresources>
   <gresource prefix="/">
     <file compressed="true">main.glade</file>
+    <file compressed="true">about.glade</file>
     <file>layer-widget.glade</file>
+    <file>dialog.glade</file>
+    <file compressed="true" alias="logo.svg">../icon/gds-render.svg</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"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   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">
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="8"
+     inkscape:cx="123.37499"
+     inkscape:cy="62.837322"
+     inkscape:document-units="mm"
+     inkscape:current-layer="layer2"
+     showgrid="false"
+     units="mm"
+     inkscape:window-width="2880"
+     inkscape:window-height="1508"
+     inkscape:window-x="0"
+     inkscape:window-y="38"
+     inkscape:window-maximized="1" />
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+    <linearGradient
+       inkscape:collect="always"
+       id="linearGradient4825-0">
+      <stop
+         style="stop-color:#c4a000;stop-opacity:1"
+         offset="0"
+         id="stop4821" />
+      <stop
+         style="stop-color:#c4a000;stop-opacity:0"
+         offset="1"
+         id="stop4823" />
+    </linearGradient>
+    <linearGradient
+       osb:paint="solid"
+       id="linearGradient4788">
+      <stop
+         id="stop4786"
+         offset="0"
+         style="stop-color:#c4a000;stop-opacity:1;" />
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+        </g>
+      </g>
+    </g>
+  </g>
+</svg>

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

@@ -0,0 +1,48 @@
+/*
+ * 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-output.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/layer/layer-info.h>
+
+/** @addtogroup Cairo-Renderer
+ *  @{
+ */
+
+#define MAX_LAYERS (300) /**< \brief Maximum layer count the output renderer can process. Typically GDS only specifies up to 255 layers.*/
+
+/**
+ * @brief Render \p cell to a PDF file specified by \p pdf_file
+ * @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
+ */
+void cairo_render_cell_to_vector_file(struct gds_cell *cell, GList *layer_infos, char *pdf_file, char *svg_file, double scale);
+
+/** @} */
+
+#endif /* _CAIRO_OUTPUT_H_ */

include/gds-render/command-line.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 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 Convert GDS according to supplied parameters
+ * @param gds_name GDS File path
+ * @param pdf_name Cairo-PDF path
+ * @param tex_name TeX/TikZ path
+ * @param pdf Render Cairo
+ * @param tex Render LaTeX
+ * @param layer_file Layer mapping file
+ * @param cell_name Cell name to render
+ * @param scale Scale image down by this value
+ * @param pdf_layers TikZ creates OCG layers
+ * @param pdf_standalone LaTeX document is standalone7
+ * @param svg Render to SVG file
+ * @param so_name Path to shared object of custom renderer
+ * @param so_out_file Output file path for custom renderer
+ * @param svg_name SVG file name
+ *
+ * @note This function is pretty damn retarded (Lots of parameters). Will be reworked when generating GObjects for renderers.
+ */
+void command_line_convert_gds(char *gds_name, char *pdf_name, char *tex_name, gboolean pdf, gboolean tex,
+			      char *layer_file, char *cell_name, double scale, gboolean pdf_layers,
+			      gboolean pdf_standalone, gboolean svg, char *svg_name, char *so_name, char *so_out_file);
+
+#endif /* _COMMAND_LINE_H_ */
+
+/** @} */

include/gds-render/external-renderer.h

@@ -0,0 +1,59 @@
+/*
+ * 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 external-renderer
+ * @{
+ */
+
+#ifndef _EXTERNAL_RENDERER_H_
+#define _EXTERNAL_RENDERER_H_
+
+#include <gds-render/gds-utils/gds-types.h>
+#include <glib.h>
+
+/**
+ * @brief function name expected to be found in external library.
+ * 
+ * The function has to be defined as follows:
+ * @code
+ * int function_name(gds_cell *toplevel, GList *layer_info_list, char *output_file_name)
+ * @endcode
+ */
+#define EXTERNAL_LIBRARY_FUNCTION "render_cell_to_file"
+
+/**
+ * @brief external_renderer_render_cell
+ * @param toplevel_cell The toplevel cell to render
+ * @param layer_info_list The layer information. Contains #layer_info elements
+ * @param output_file Output file
+ * @param so_path Path to the shared object file containing #EXTERNAL_LIBRARY_FUNCTION
+ * @return 0 on success
+ */
+int external_renderer_render_cell(struct gds_cell *toplevel_cell, GList *layer_info_list, char *output_file, char *so_path);
+
+#endif /* _EXTERNAL_RENDERER_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

@@ -17,24 +17,34 @@
  * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef __LAYER_SELECTOR_H__
-#define __LAYER_SELECTOR_H__
+/**
+ * @file gds-parser.h
+ * @brief Header file for the GDS-Parser
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup GDS-Utilities
+ * @{
+ */
+
+#ifndef _GDSPARSER_H_
+#define _GDSPARSER_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;
-};
+#include <gds-render/gds-utils/gds-types.h>
 
-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);
+#define GDS_PRINT_DEBUG_INFOS (0) /**< @brief 1: Print infos, 0: Don't print */
 
-#endif /* __LAYER_SELECTOR_H__ */
+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 /* _GDSPARSE_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 references 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 */
+	uint16_t datatype;
+};
+
+/**
+ * @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 +1,58 @@
+/*
+ * 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 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>
+
+union bounding_box {
+	/** Coordinate System is (y up | x right) */
+	struct _vectors {
+		struct vector_2d lower_left;
+		struct vector_2d upper_right;
+	} vectors;
+	struct vector_2d vector_array[2];
+};
+
+typedef void (*conv_generic_to_vector_2d_t)(void *, struct vector_2d *);
+
+void bounding_box_calculate_polygon(GList *vertices, conv_generic_to_vector_2d_t conv_func, union bounding_box *box);
+void bounding_box_update_box(union bounding_box *destination, union bounding_box *update);
+void bounding_box_prepare_empty(union bounding_box *box);
+void bounding_box_update_point(union bounding_box *destination, conv_generic_to_vector_2d_t conv_func, void *pt);
+void bounding_box_apply_transform(double scale, double rotation_deg, bool flip_at_x, union bounding_box *box);
+void bounding_box_calculate_path_box(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 +1,47 @@
+/*
+ * 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_cell_bounding_box Calculate bounding box of gds cell
+ * @param box Resulting boundig box. Will be uüdated and not overwritten
+ * @param cell Toplevel cell
+ * @warning Path handling 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/latex-renderer/latex-output.h

@@ -0,0 +1,56 @@
+/*
+ * 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-output.h
+ * @brief LaTeX output renderer
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#ifndef __LATEX_OUTPUT_H__
+#define __LATEX_OUTPUT_H__
+
+/**
+ * @addtogroup LaTeX-Renderer
+ * @{
+ */
+
+#include <glib.h>
+#include <stdio.h>
+
+#include "gds-render/layer/layer-info.h"
+#include <gds-render/gds-utils/gds-types.h>
+
+#define LATEX_LINE_BUFFER_KB (10) /**< @brief Buffer for LaTeX Code line in KiB */
+
+/**
+ * @brief Render \p cell to LateX/TikZ code
+ * @param cell Cell to render
+ * @param layer_infos Layer information
+ * @param tex_file Already opened file to write data in
+ * @param scale Scale image down by this value
+ * @param create_pdf_layers Optional content groups used
+ * @param standalone_document document can be compiled standalone
+ */
+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__ */

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

@@ -0,0 +1,51 @@
+/*
+ * 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-info.h
+ * @brief Helper functions and definition of layer info struct
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#ifndef _LAYER_INFO_H_
+#define _LAYER_INFO_H_
+
+#include <gtk/gtk.h>
+
+/**
+ * @brief Layer information.
+ *
+ * This structs contains information on how to render a layer
+ */
+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 */
+};
+
+/**
+ * @brief Delete a layer_info struct
+ * @param info Struct to be deleted.
+ * @note The layer_info::name Element has to be freed manually
+ */
+void layer_info_delete_struct(struct layer_info *info);
+
+#endif // _LAYER_INFO_H_

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

@@ -0,0 +1,97 @@
+/*
+ * 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>
+
+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 List of layer_info structures containing the layer information
+ */
+GList *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);
+
+G_END_DECLS
+
+#endif /* __LAYER_SELECTOR_H__ */
+
+/** @} */

include/gds-render/layer/mapping-parser.h

@@ -0,0 +1,59 @@
+/*
+ * 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 mapping-parser.h
+ * @brief Function to read a mapping file line and parse it.
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#ifndef __MAPPING_PARSER_H__
+#define __MAPPING_PARSER_H__
+
+/**
+ * @addtogroup  Mapping-Parser
+ * @{
+ */
+
+#include <glib.h>
+
+#include <gds-render/widgets/layer-element.h>
+
+/**
+ * @brief Load a line from \p stream and parse try to parse it as layer information
+ * @param stream Input data stream
+ * @param export Layer shall be exported
+ * @param name Layer name. Free returned pointer after using.
+ * @param layer Layer number
+ * @param color RGBA color.
+ * @return 1 if malformatted line, 0 if parsing was successful and parameters are valid, -1 if file end
+ */
+int mapping_parser_load_line(GDataInputStream *stream, gboolean *export, char **name, int *layer, GdkRGBA *color);
+
+/**
+ * @brief Create Line for LayerMapping file with supplied information
+ * @param layer_element information
+ * @param line_buffer buffer to write to
+ * @param max_len Maximum length that cna be used in \p line_buffer
+ */
+void mapping_parser_gen_csv_line(LayerElement *layer_element, char *line_buffer, size_t max_len);
+
+/** @} */
+
+#endif /* __MAPPING_PARSER_H__ */

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

@@ -17,6 +17,17 @@
  * 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__
 #define __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/tree-renderer/tree-store.h

@@ -0,0 +1,57 @@
+/*
+ * 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 tree-store.h
+ * @brief Header file for Tree store implementation
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup GUI
+ * @{
+ */
+
+#ifndef __TREE_STORE_H__
+#define __TREE_STORE_H__
+
+#include <gtk/gtk.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_MODDATE,
+        CELL_SEL_ACCESSDATE,
+	CELL_SEL_COLUMN_COUNT /**< @brief Not a column. Used to determine count of columns */
+};
+
+struct tree_stores {
+		GtkTreeView *base_tree_view;
+		GtkTreeStore *base_store;
+		GtkTreeModelFilter *filter;
+		GtkEntry *search_entry;
+};
+
+struct tree_stores *setup_cell_selector(GtkTreeView* view, GtkEntry *search_entry);
+
+#endif /* __TREE_STORE_H__ */
+
+/** @} */

include/gds-render/version.h

@@ -17,13 +17,12 @@
  * 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__ */
+/** @} */

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 Omplementation 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-renderer/latex-output.c

@@ -17,11 +17,36 @@
  * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "latex-output.h"
+/**
+ * @file latex-output.c
+ * @brief LaTeX output renderer
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
 #include <math.h>
 
+#include <gds-render/latex-renderer/latex-output.h>
+
+/**
+ * @addtogroup LaTeX-Renderer
+ * @{
+ */
+
+/** @brief Writes a GString \p buffer to the fixed file tex_file */
 #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;
@@ -53,11 +78,30 @@ static void write_layer_definitions(FILE *tex_file, GList *layer_infos, GString
 }
 
 /**
- * @brief write_layer_env
- * @param tex_file
- * @param layer
- * @param buffer
- * @return TRUE if layer is placeable
+ * @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)
 {
@@ -71,7 +115,7 @@ static gboolean write_layer_env(FILE *tex_file, GdkRGBA *color, int layer, GList
 			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",
+			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;
@@ -80,8 +124,18 @@ static gboolean write_layer_env(FILE *tex_file, GdkRGBA *color, int layer, GList
 	return FALSE;
 }
 
-
-static void generate_graphics(FILE *tex_file, GList *graphics, GList *linfo, GString *buffer)
+/**
+ * @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;
@@ -95,19 +149,19 @@ static void generate_graphics(FILE *tex_file, GList *graphics, GList *linfo, GSt
 		if (write_layer_env(tex_file, &color, (int)gfx->layer, linfo, buffer) == TRUE) {
 
 			/* Layer is defined => create graphics */
-			if (gfx->gfx_type == GRAPHIC_POLYGON) {
+			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)/1000.0, ((double)pt->y)/1000.0);
+					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) {
+			} else if (gfx->gfx_type == GRAPHIC_PATH) {
 
 				if (g_list_length(gfx->vertices) < 2) {
 					printf("Cannot write path with less than 2 points\n");
@@ -116,11 +170,11 @@ static void generate_graphics(FILE *tex_file, GList *graphics, GList *linfo, GSt
 
 				if (gfx->path_render_type < 0 || gfx->path_render_type > 2) {
 					printf("Path type unrecognized. Setting to 'flushed'\n");
-					gfx->path_render_type = 0;
+					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/1000.0, gfx->layer, color.alpha,
+						gfx->width_absolute/scale, gfx->layer, color.alpha,
 						line_caps[gfx->path_render_type]);
 				WRITEOUT_BUFFER(buffer);
 
@@ -128,8 +182,8 @@ static void generate_graphics(FILE *tex_file, GList *graphics, GList *linfo, GSt
 				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)/1000.0,
-							((double)pt->y)/1000.0,
+							((double)pt->x)/scale,
+							((double)pt->y)/scale,
 							(temp_vertex->next ? " -- " : ""));
 					WRITEOUT_BUFFER(buffer);
 				}
@@ -144,32 +198,44 @@ static void generate_graphics(FILE *tex_file, GList *graphics, GList *linfo, GSt
 	} /* For graphics */
 }
 
-
-static void render_cell(struct gds_cell *cell, GList *layer_infos, FILE *tex_file, GString *buffer)
+/**
+ * @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
+ */
+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);
+	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)/1000.0,((double)inst->origin.y)/1000.0);
+				((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=%s]\n", (inst->flipped ? "-1" : "1"));
+		g_string_printf(buffer, "\\begin{scope}[yscale=%lf, xscale=%lf]\n", (inst->flipped ? -1*inst->magnification : inst->magnification),
+				inst->magnification);
 		WRITEOUT_BUFFER(buffer);
 
-		if (inst->cell_ref)
-			render_cell(inst->cell_ref, layer_infos, tex_file, buffer);
+		render_cell(inst->cell_ref, layer_infos, tex_file, buffer, scale);
 
 		g_string_printf(buffer, "\\end{scope}\n");
 		WRITEOUT_BUFFER(buffer);
@@ -183,7 +249,8 @@ static void render_cell(struct gds_cell *cell, GList *layer_infos, FILE *tex_fil
 
 }
 
-void render_cell_to_code(struct gds_cell *cell, GList *layer_infos, FILE *tex_file)
+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;
 
@@ -195,9 +262,11 @@ void render_cell_to_code(struct gds_cell *cell, GList *layer_infos, FILE *tex_fi
 	working_line = g_string_new_len(NULL, LATEX_LINE_BUFFER_KB*1024);
 
 	/* standalone foo */
-	g_string_printf(working_line, "\\newif\\iftestmode\n\\testmodefalse %% Change to true for standalone rendering\n");
+	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\\createpdflayersfalse %% Change to true for Embedded layers in PDF output\n");
+	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);
@@ -214,7 +283,7 @@ void render_cell_to_code(struct gds_cell *cell, GList *layer_infos, FILE *tex_fi
 	WRITEOUT_BUFFER(working_line);
 
 	/* Generate graphics output */
-	render_cell(cell, layer_infos, tex_file, working_line);
+	render_cell(cell, layer_infos, tex_file, working_line, scale);
 
 
 	g_string_printf(working_line, "\\end{tikzpicture}\n");
@@ -230,3 +299,5 @@ void render_cell_to_code(struct gds_cell *cell, GList *layer_infos, FILE *tex_fi
 	fflush(tex_file);
 	g_string_free(working_line, TRUE);
 }
+
+/** @} */

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 "layer-widget/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-widget/layer-element.h

@@ -1,61 +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_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;
-
-typedef struct _LayerElement {
-	/* Inheritance */
-	GtkListBoxRow parent;
-	/* Custom Elements */
-	LayerElementPriv priv;
-} LayerElement;
-
-GtkWidget *layer_element_new(void);
-
-const char *layer_element_get_name(LayerElement *elem);
-void layer_element_set_name(LayerElement *elem, const char* name);
-void layer_element_set_layer(LayerElement *elem, int layer);
-int layer_element_get_layer(LayerElement *elem);
-void layer_element_set_export(LayerElement *elem, gboolean export);
-gboolean layer_element_get_export(LayerElement *elem);
-void layer_element_get_color(LayerElement *elem, GdkRGBA *rgba);
-void layer_element_set_color(LayerElement *elem, GdkRGBA *rgba);
-
-G_END_DECLS
-
-#endif /* __LAYER_ELEMENT_H__ */

layer/layer-info.c

@@ -0,0 +1,33 @@
+/*
+ * 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-info.c
+ * @brief Helper functions for layer info struct
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+#include <gds-render/layer/layer-info.h>
+
+void layer_info_delete_struct(struct layer_info *info)
+{
+	if (info)
+		free(info);
+}
+

layer/layer-selector.c

@@ -0,0 +1,784 @@
+/*
+ * 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/layer/layer-info.h>
+#include <gds-render/gds-utils/gds-parser.h>
+#include <gds-render/widgets/layer-element.h>
+#include <gds-render/layer/mapping-parser.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;
+
+	row = NULL;
+	for (i = 0; ; i++) {
+		GtkListBoxRow *tmp;
+		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;
+
+	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;
+
+	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;
+
+	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;
+}
+
+GList *layer_selector_export_rendered_layer_info(LayerSelector *selector)
+{
+	GList *info_list = NULL;
+	LayerElement *le;
+	struct layer_info *linfo;
+	GList *row_list;
+	GList *temp;
+	int i;
+
+	if (!selector)
+		return NULL;
+
+	row_list = gtk_container_get_children(GTK_CONTAINER(selector->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;
+}
+
+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 Cell List */
+	} /* 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, 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(self->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(self->list_box), GTK_WIDGET(le));
+	}
+
+	while((result = mapping_parser_load_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 = layer_selector_find_layer_element_in_list(rows, layer))) {
+			gtk_list_box_insert(self->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(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;
+
+	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)
+{
+	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(self->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;
+		mapping_parser_gen_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);
+}
+
+/**
+ * @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;
+
+	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);
+}
+
+/** @} */

layer/mapping-parser.c

@@ -0,0 +1,144 @@
+/*
+ *
+ * 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 mapping-parser.c
+ * @brief Function to read a mapping file line and parse it.
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup Mapping-Parser
+ * @{
+ */
+
+#include <gds-render/layer/mapping-parser.h>
+
+int mapping_parser_load_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;
+
+}
+
+void mapping_parser_gen_csv_line(LayerElement *layer_element, char *line_buffer, size_t max_len)
+{
+	int i;
+	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);
+	/* 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] = ',';
+	}
+
+	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);
+}
+
+/** @} */
+

main.c

@@ -17,261 +17,318 @@
  * 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 "gds-parser/gds-parser.h"
 #include <gtk/gtk.h>
-#include "layer-widget/layer-element.h"
-#include "layer-selector.h"
-#include "tree-renderer/tree-store.h"
-#include "latex-output/latex-output.h"
+#include <glib.h>
 
-struct open_button_data {
-	GtkWindow *main_window;
-	GList **list_ptr;
-	GtkTreeStore *cell_store;
-	GtkListBox *layer_box;
+#include <gds-render/gds-render-gui.h>
+#include <gds-render/command-line.h>
+#include <gds-render/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;
+		GList *gui_list;
 };
 
-struct convert_button_data {
-	GtkTreeView *tree_view;
-	GtkWindow *main_window;
+/**
+ * @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 * 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;
+	GdkPixbuf *logo_buf;
+	GError *error = NULL;
+	(void)user_data;
+	(void)action;
+	(void)parameter;
+
+	builder = gtk_builder_new_from_resource("/about.glade");
+	dialog = GTK_DIALOG(gtk_builder_get_object(builder, "about-dialog"));
+	gtk_window_set_transient_for(GTK_WINDOW(dialog), NULL);
+	gtk_about_dialog_set_version(GTK_ABOUT_DIALOG(dialog), _app_version_string);
+
+	/* Load icon from resource */
+	logo_buf = gdk_pixbuf_new_from_resource_at_scale("/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(GTK_WIDGET(dialog));
+	g_object_unref(builder);
+}
+
+/**
+ * @brief Contains the application menu entries
+ */
+const static GActionEntry app_actions[] = {
+	{"quit", app_quit, NULL, NULL, NULL, {0}},
+	{"about", app_about, NULL, NULL, NULL, {0}}
 };
 
-gboolean on_window_close(gpointer window, gpointer user)
+/**
+ * @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 unreferenced.
+ *
+ * @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)
 {
-	gtk_widget_destroy(GTK_WIDGET(window));
-	gtk_main_quit();
-	return TRUE;
+	GList **gui_list = (GList **)user_data;
+
+	/* Dispose of Gui element */
+	*gui_list = g_list_remove(*gui_list, gui);
+	g_object_unref(gui);
 }
 
-static GString *generate_string_from_date(struct gds_time_field *date)
+/**
+ * @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)
 {
-	GString *str;
+	GtkWindow *main_window;
+	GdsRenderGui *gui;
 
-	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;
+	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);
+
+	gtk_application_add_window(GTK_APPLICATION(app), main_window);
+	gtk_widget_show(GTK_WIDGET(main_window));
 }
 
-void on_load_gds(gpointer button, gpointer user)
+/**
+ * @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)
 {
-	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);
+	GtkApplication *gapp;
+	int app_status;
+	static struct application_data appdata = {
+		.gui_list = NULL
+	};
+	GMenu *menu;
+	GMenu *m_quit;
+	GMenu *m_about;
 
-	dialog_result = gtk_dialog_run(GTK_DIALOG(open_dialog));
+	gapp = gtk_application_new("de.shimatta.gds-render", G_APPLICATION_FLAGS_NONE);
+	g_application_register(G_APPLICATION(gapp), NULL, NULL);
+	g_signal_connect(gapp, "activate", G_CALLBACK(gapp_activate), &appdata);
 
-	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));
+	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 said instance.\n");
+		return 0;
 	}
 
-end_destroy:
-	/* Destroy dialog and filter */
-	gtk_widget_destroy(open_dialog);
+	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_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);
+	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);
+
+	g_list_free(appdata.gui_list);
+
+	return app_status;
 }
 
-static void on_convert_clicked(gpointer button, gpointer user)
+/**
+ * @brief Print the application version string to stdout
+ */
+static void print_version(void)
 {
-	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 *tex_file;
-	GtkWidget *dialog;
-	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();
-
-	/* save file dialog */
-	dialog = gtk_file_chooser_dialog_new("Save TeX File", GTK_WINDOW(data->main_window), GTK_FILE_CHOOSER_ACTION_SAVE,
-					     "Cancel", GTK_RESPONSE_CANCEL, "Save", 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));
-		tex_file = fopen(file_name, "w");
-		g_free(file_name);
-		gtk_widget_destroy(dialog);
-		render_cell_to_code(cell_to_render, layer_list, tex_file);
-		fclose(tex_file);
-	} else {
-		gtk_widget_destroy(dialog);
-	}
-
-	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);
-	}
+	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)
 {
-	GtkBuilder *main_builder;
-	GList *gds_libs = NULL;
-	GtkTreeView *cell_tree;
-	GtkTreeStore *cell_store;
-	GtkWidget *conv_button;
-	GtkWidget *listbox;
+	int i;
+	GError *error = NULL;
+	GOptionContext *context;
+	gchar *gds_name;
+	gchar *basename;
+	gchar *pdfname = NULL, *texname = NULL, *mappingname = NULL, *cellname = NULL, *svgname = NULL;
+	gboolean tikz = FALSE, pdf = FALSE, pdf_layers = FALSE, pdf_standalone = FALSE, svg = FALSE;
+	gboolean version = FALSE;
+	gchar *custom_library_path = NULL;
+	gchar *custom_library_file_name = NULL;
+	int scale = 1000;
+	int app_status = 0;
 
-	struct open_button_data open_data;
-	struct convert_button_data conv_data;
+	GOptionEntry entries[] = {
+		{"version", 'v', 0, G_OPTION_ARG_NONE, &version, "Print version", NULL},
+		{"tikz", 't', 0, G_OPTION_ARG_NONE, &tikz, "Output TikZ code", NULL },
+		{"pdf", 'p', 0, G_OPTION_ARG_NONE, &pdf, "Output PDF document", NULL },
+		//{"svg", 'S', 0, G_OPTION_ARG_NONE, &svg, "Output SVG image", NULL },
+		{"scale", 's', 0, G_OPTION_ARG_INT, &scale, "Divide output coordinates by <SCALE>", "<SCALE>" },
+		{"tex-output", 'o', 0, G_OPTION_ARG_FILENAME, &texname, "Optional path for TeX file", "PATH" },
+		{"pdf-output", 'O', 0, G_OPTION_ARG_FILENAME, &pdfname, "Optional path for PDF file", "PATH" },
+		//{"svg-output", 0, 0, G_OPTION_ARG_FILENAME, &svgname, "Optional path for PDF file", "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 PDF", 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, &custom_library_path, "Path to a custom shared object, that implements the " EXTERNAL_LIBRARY_FUNCTION " function", "PATH"},
+		{"external-lib-output", 'e', 0, G_OPTION_ARG_FILENAME, &custom_library_file_name, "Output path for external render library", "PATH"},
+		{NULL}
+	};
 
-	gtk_init(&argc, &argv);
+	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));
 
-	main_builder = gtk_builder_new_from_resource("/main.glade");
-	gtk_builder_connect_signals(main_builder, NULL);
+	if (!g_option_context_parse(context, &argc, &argv, &error)) {
+		g_print("Option parsing failed: %s\n", error->message);
+		exit(1);
+	}
 
+	if (version) {
+		print_version();
+		goto ret_status;
+	}
 
+	if (argc >= 2) {
+		if (scale < 1) {
+			printf("Scale < 1 not allowed. Setting to 1\n");
+			scale = 1;
+		}
 
-	cell_tree = (GtkTreeView *)gtk_builder_get_object(main_builder, "cell-tree");
-	cell_store = setup_cell_selector(cell_tree);
+		/* No format selected */
+		if (!(tikz || pdf || svg))
+			tikz = TRUE;
 
+		/* Get gds name */
+		gds_name = argv[1];
 
-	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);
+		/* Print out additional arguments as ignored */
+		for (i = 2; i < argc; i++) {
+			printf("Ignored argument: %s", argv[i]);
+		}
 
-	/* Connect delete-event */
-	g_signal_connect(GTK_WIDGET(open_data.main_window), "delete-event", G_CALLBACK(on_window_close), NULL);
-	
+		/* Check if PDF/TeX names are supplied. if not generate */
+		basename = g_path_get_basename(gds_name);
 
-	/* Connect Convert button */
-	conv_data.tree_view = cell_tree;
-	conv_data.main_window = open_data.main_window;
+		if (!texname)
+			texname = g_strdup_printf("./%s.tex", basename);
 
-	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);
+		if (!pdfname)
+			pdfname = g_strdup_printf("./%s.pdf", basename);
 
-	listbox = GTK_WIDGET(gtk_builder_get_object(main_builder, "layer-list"));
-	open_data.layer_box = GTK_LIST_BOX(listbox);
+		if (!svgname)
+			svgname = g_strdup_printf("./%s.svg", basename);
 
-	/* 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);
+		command_line_convert_gds(gds_name, pdfname, texname, pdf, tikz,
+					 mappingname, cellname, (double)scale,
+					 pdf_layers, pdf_standalone, svg, svgname,
+					 custom_library_path, custom_library_file_name);
+		/* Clean up */
+		g_free(pdfname);
+		g_free(texname);
+		g_free(svgname);
+		g_free(basename);
+		if (mappingname)
+			g_free(mappingname);
+		if (cellname)
+			g_free(cellname);
+		app_status = 0;
+	} else {
+		app_status = start_gui(argc, argv);
+	}
 
-	/* 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);
-
-	gtk_main();
-
-	return 0;
+ret_status:
+	return app_status;
 }

tree-renderer/lib-cell-renderer.c

@@ -17,14 +17,26 @@
  * 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/tree-renderer/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_ERROR_LEVEL,
 	PROP_COUNT
 };
 
@@ -38,24 +50,56 @@ 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);
 		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);
 		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);
+		break;
 	default:
 		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, param_id, pspec);
 		break;
@@ -74,11 +118,12 @@ 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 +134,8 @@ 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 +144,5 @@ GtkCellRenderer *lib_cell_renderer_new()
 {
 	return GTK_CELL_RENDERER(g_object_new(TYPE_LIB_CELL_RENDERER, NULL));
 }
+
+/** @} */

tree-renderer/tree-store.c

@@ -1,7 +1,46 @@
-#include "tree-store.h"
-#include "lib-cell-renderer.h"
-#include "../gds-parser/gds-types.h"
+/*
+ * 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 tree-store.h
+ * @brief Tree store implementation
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup GUI
+ * @{
+ */
+
+#include <gds-render/tree-renderer/tree-store.h>
+#include <gds-render/tree-renderer/lib-cell-renderer.h>
+#include <gds-render/gds-utils/gds-types.h>
+
+/**
+ * @brief this function olny allows 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,
@@ -10,59 +49,116 @@ static gboolean tree_sel_func(GtkTreeSelection *selection,
 {
 	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, -1);
+	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)
-		return TRUE;
-	else
-		return FALSE;
+	/* 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;
 }
 
-GtkTreeStore *setup_cell_selector(GtkTreeView* view)
+/**
+ * @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)
 {
-	GtkTreeStore *cell_store;
+	struct tree_stores *stores = (struct tree_stores *)data;
+	struct gds_cell *cell;
+	struct gds_library *lib;
+	gboolean result = FALSE;
+	const char *search_string;
 
+	if (!model || !iter || !stores)
+		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(stores->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(stores->base_tree_view);
+
+exit_filter:
+	return result;
+}
+
+static void change_filter(GtkWidget *entry, gpointer data)
+{
+	struct tree_stores *stores = (struct tree_stores *)data;
+	(void)entry;
+
+	gtk_tree_model_filter_refilter(stores->filter);
+}
+
+/**
+ * @brief Setup a GtkTreeView with the necessary columns
+ * @param view Tree view to set up
+ * @param search_entry Entry field for search
+ * @return Tree stores for storing data inside the GtkTreeView
+ */
+struct tree_stores *setup_cell_selector(GtkTreeView* view, GtkEntry *search_entry)
+{
+	static struct tree_stores stores;
 	GtkCellRenderer *render_dates;
 	GtkCellRenderer *render_cell;
 	GtkCellRenderer *render_lib;
 	GtkTreeViewColumn *column;
-	GdkRGBA cell_text_color;
-	GValue val = G_VALUE_INIT;
 
-	cell_store = gtk_tree_store_new(CELL_SEL_COLUMN_COUNT, G_TYPE_POINTER, G_TYPE_POINTER, G_TYPE_STRING, G_TYPE_STRING);
-	gtk_tree_view_set_model(view, GTK_TREE_MODEL(cell_store));
+	stores.base_tree_view = view;
+	stores.search_entry = search_entry;
+
+	stores.base_store = gtk_tree_store_new(CELL_SEL_COLUMN_COUNT, G_TYPE_POINTER, G_TYPE_POINTER, G_TYPE_UINT, G_TYPE_STRING, G_TYPE_STRING);
+
+	/* Searching */
+	if (search_entry) {
+		stores.filter = GTK_TREE_MODEL_FILTER(gtk_tree_model_filter_new(GTK_TREE_MODEL(stores.base_store), NULL));
+		gtk_tree_model_filter_set_visible_func (stores.filter,
+								(GtkTreeModelFilterVisibleFunc)cell_store_filter_visible_func,
+								 &stores, NULL);
+		g_signal_connect(GTK_SEARCH_ENTRY(search_entry), "search-changed", G_CALLBACK(change_filter), &stores);
+	}
+
+	gtk_tree_view_set_model(view, GTK_TREE_MODEL(stores.filter));
 
 	render_dates = gtk_cell_renderer_text_new();
 	render_cell = lib_cell_renderer_new();
 	render_lib = lib_cell_renderer_new();
 
-	/* Set foreground color for cell column */
-	cell_text_color.alpha = 1;
-	cell_text_color.red = (double)61.0/(double)255.0;
-	cell_text_color.green = (double)152.0/(double)255.0;
-	cell_text_color.blue = 0.0;
-
-	g_value_init(&val, G_TYPE_BOOLEAN);
-	g_value_set_boolean(&val, TRUE);
-	g_object_set_property(G_OBJECT(render_cell), "foreground-set", &val);
-	g_value_unset(&val);
-
-	g_value_init(&val, GDK_TYPE_RGBA);
-	g_value_set_boxed(&val, &cell_text_color);
-	g_object_set_property(G_OBJECT(render_cell), "foreground-rgba", &val);
-	g_value_unset(&val);
-
-
-
-
 	column = gtk_tree_view_column_new_with_attributes("Library", render_lib, "gds-lib", CELL_SEL_LIBRARY, NULL);
 	gtk_tree_view_append_column(view, column);
 
-	/* Cell color: #3D9801 */
-	column = gtk_tree_view_column_new_with_attributes("Cell", render_cell, "gds-cell", CELL_SEL_CELL, NULL);
+	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(view, column);
 
 	column = gtk_tree_view_column_new_with_attributes("Mod. Date", render_dates, "text", CELL_SEL_MODDATE, NULL);
@@ -75,5 +171,6 @@ GtkTreeStore *setup_cell_selector(GtkTreeView* view)
 	 * This prevents selecting a library */
 	gtk_tree_selection_set_select_function(gtk_tree_view_get_selection(view), tree_sel_func, NULL, NULL);
 
-	return cell_store;
+	return &stores;
 }
+/** @} */

tree-renderer/tree-store.h

@@ -1,16 +0,0 @@
-#ifndef __TREE_STORE_H__
-#define __TREE_STORE_H__
-
-#include <gtk/gtk.h>
-
-enum cell_store_columns {
-        CELL_SEL_LIBRARY = 0,
-        CELL_SEL_CELL,
-        CELL_SEL_MODDATE,
-        CELL_SEL_ACCESSDATE,
-        CELL_SEL_COLUMN_COUNT
-};
-
-GtkTreeStore *setup_cell_selector(GtkTreeView* view);
-
-#endif /* __TREE_STORE_H__ */

version/CMakeLists.txt

@@ -0,0 +1,5 @@
+add_library(version STATIC "version.c")
+execute_process(COMMAND bash ./generate-version-string.sh
+		WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}		
+		OUTPUT_VARIABLE GIT_VER)
+target_compile_definitions(version PUBLIC PROJECT_GIT_VERSION=${GIT_VER})

version/generate-version-string.sh

@@ -0,0 +1 @@
+git describe --tags --dirty

version/version.c

@@ -17,16 +17,20 @@
  * 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"
+/**
+ * @defgroup version Version Number
+ * See @ref git-version-num
+ * @addtogroup version
+ * @{
+ */
 
-#define LATEX_LINE_BUFFER_KB (10)
+#ifdef PROJECT_GIT_VERSION
+#define xstr(a) str(a)
+#define str(a) #a
+const char *_app_version_string = xstr(PROJECT_GIT_VERSION);
+#else
+const char *_app_version_string = "! version not set !";
+#endif
 
-void render_cell_to_code(struct gds_cell *cell, GList *layer_infos, FILE *tex_file);
-
-#endif /* __LATEX_OUTPUT_H__ */
+/** @} */

widgets/conv-settings-dialog.c

@@ -0,0 +1,398 @@
+/*
+ * 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.c
+ * @brief Implementation of the setting dialog
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup RendererSettingsDialog
+ * @ingroup Widgets
+ * @{
+ */
+
+#include <gds-render/widgets/conv-settings-dialog.h>
+
+struct  _RendererSettingsDialog {
+		GtkDialog parent;
+		/* Private loot */
+		GtkWidget *radio_latex;
+		GtkWidget *radio_cairo_pdf;
+		GtkWidget *radio_cairo_svg;
+		GtkWidget *scale;
+		GtkWidget *layer_check;
+		GtkWidget *standalone_check;
+		GtkDrawingArea *shape_drawing;
+		GtkLabel *x_label;
+		GtkLabel *y_label;
+
+		GtkLabel *x_output_label;
+		GtkLabel *y_output_label;
+
+		unsigned int cell_height;
+		unsigned int cell_width;
+		double unit_in_meters;
+};
+
+G_DEFINE_TYPE(RendererSettingsDialog, renderer_settings_dialog, GTK_TYPE_DIALOG)
+
+enum {
+	PROP_CELL_NAME = 1,
+	PROP_COUNT
+};
+
+static GParamSpec *properties[PROP_COUNT];
+
+static void renderer_settings_dialog_set_property(GObject *object, guint property_id,
+						  const GValue *value, GParamSpec *pspec)
+{
+	const gchar *title = NULL;
+
+	switch (property_id) {
+	case PROP_CELL_NAME:
+		title = g_value_get_string(value);
+		if (title)
+			gtk_window_set_title(GTK_WINDOW(object), title);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec);
+		break;
+	}
+}
+
+static void renderer_settings_dialog_get_property(GObject *object, guint property_id,
+						  GValue *value, GParamSpec *pspec)
+{
+	const gchar *title;
+
+	switch (property_id) {
+	case PROP_CELL_NAME:
+		title = gtk_window_get_title(GTK_WINDOW(object));
+		g_value_set_string(value, title);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec);
+		break;
+	}
+}
+
+static void renderer_settings_dialog_class_init(RendererSettingsDialogClass *klass)
+{
+	GObjectClass *oclass = G_OBJECT_CLASS(klass);
+
+	/* Override virtual functions */
+	oclass->set_property = renderer_settings_dialog_set_property;
+	oclass->get_property = renderer_settings_dialog_get_property;
+
+	properties[PROP_CELL_NAME] = g_param_spec_string("cell-name",
+							 "cell-name",
+							 "Cell name to be displayed in header bar",
+							 "",
+							 G_PARAM_READWRITE);
+	g_object_class_install_properties(oclass, PROP_COUNT, properties);
+}
+
+static void show_tex_options(RendererSettingsDialog *self)
+{
+	gtk_widget_show(self->layer_check);
+	gtk_widget_show(self->standalone_check);
+
+}
+
+static void hide_tex_options(RendererSettingsDialog *self)
+{
+	gtk_widget_hide(self->layer_check);
+	gtk_widget_hide(self->standalone_check);
+}
+
+static void latex_render_callback(GtkToggleButton *radio, RendererSettingsDialog *dialog)
+{
+	if (gtk_toggle_button_get_active(radio))
+		show_tex_options(dialog);
+	else
+		hide_tex_options(dialog);
+}
+
+static gboolean shape_drawer_drawing_callback(GtkWidget *widget, cairo_t *cr, gpointer data)
+{
+	int width;
+	int height;
+	GtkStyleContext *style_context;
+	GdkRGBA foreground_color;
+	RendererSettingsDialog *dialog = (RendererSettingsDialog *)data;
+	double usable_width;
+	double usable_height;
+	double height_scale;
+	double width_scale;
+	double final_scale_value;
+
+	style_context = gtk_widget_get_style_context(widget);
+	width = gtk_widget_get_allocated_width(widget);
+	height = gtk_widget_get_allocated_height(widget);
+
+	gtk_render_background(style_context, cr, 0, 0, width, height);
+
+	gtk_style_context_get_color(style_context, gtk_style_context_get_state(style_context),
+					&foreground_color);
+
+	gdk_cairo_set_source_rgba(cr, &foreground_color);
+
+	cairo_save(cr);
+
+	/* Tranform coordiante system */
+	cairo_scale(cr, 1, -1);
+	cairo_translate(cr, (double)width/2.0, -(double)height/2.0);
+
+	/* Define usable drawing area */
+	usable_width = (0.95*(double)width) - 15.0;
+	usable_height = (0.95*(double)height) - 15.0;
+
+	width_scale = usable_width/(double)dialog->cell_width;
+	height_scale = usable_height/(double)dialog->cell_height;
+
+	final_scale_value = (width_scale < height_scale ? width_scale : height_scale);
+
+	cairo_rectangle(cr, -(double)dialog->cell_width*final_scale_value/2.0, -(double)dialog->cell_height*final_scale_value/2.0,
+			(double)dialog->cell_width*final_scale_value, (double)dialog->cell_height*final_scale_value);
+	cairo_stroke(cr);
+	cairo_restore(cr);
+
+	return FALSE;
+}
+
+static double convert_number_to_engineering(double input, const char **out_prefix)
+{
+	const char *selected_prefix = NULL;
+	double return_val = 0.0;
+	int idx;
+	const static char * prefixes[] = {"y", "z", "a", "f", "p", "n", "u", "m", "c", "d", /* < 1 */
+				 "", /* 1 */
+				 "h", "k", "M", "G", "T", "P", "E", "Z", "Y"}; /* > 1 */
+	const static double scale[] = {1E-24, 1E-21, 1E-18, 1E-15, 1E-12, 1E-9, 1E-6, 1E-3, 1E-2, 1E-1,
+					1,
+					1E2, 1E3, 1E6, 1E9, 1E12, 1E15, 1E18, 1E21, 1E24};
+	const int prefix_count = (int)(sizeof(prefixes)/sizeof(char *));
+
+	/* If pointer is invalid, return NaN */
+	if (!out_prefix)
+		return 0.0 / 0.0;
+
+	/* Start with the 2nd smallest prefix */
+	for (idx = 1; idx < prefix_count; idx++) {
+		if (input < scale[idx]) {
+			/* This prefix is bigger than the number. Take the previous one */
+			selected_prefix = prefixes[idx-1];
+			return_val = input / scale[idx-1];
+			break;
+		}
+	}
+
+	/* Check if prefix was set by loop. Else take the largest in the list */
+	if (selected_prefix == NULL) {
+		selected_prefix = prefixes[prefix_count-1];
+		return_val = input / scale[prefix_count-1];
+	}
+
+	if (out_prefix)
+		*out_prefix = selected_prefix;
+
+	return return_val;
+}
+
+static void renderer_settings_dialog_update_labels(RendererSettingsDialog *self)
+{
+	char default_buff[100];
+	double scale;
+	double width_meters;
+	double height_meters;
+	double width_engineering;
+	const char *width_prefix;
+	double height_engineering;
+	const char *height_prefix;
+
+	if (!self)
+		return;
+
+	width_meters = (double)self->cell_width * self->unit_in_meters;
+	height_meters = (double)self->cell_height * self->unit_in_meters;
+
+	width_engineering = convert_number_to_engineering(width_meters, &width_prefix);
+	height_engineering = convert_number_to_engineering(height_meters, &height_prefix);
+
+	snprintf(default_buff, sizeof(default_buff), "Width: %.3lf %sm", width_engineering, width_prefix);
+	gtk_label_set_text(self->x_label, default_buff);
+	snprintf(default_buff, sizeof(default_buff), "Height: %.3lf %sm", height_engineering, height_prefix);
+	gtk_label_set_text(self->y_label, default_buff);
+
+	scale = gtk_range_get_value(GTK_RANGE(self->scale));
+
+	/* Set the pixel sizes */
+	snprintf(default_buff, sizeof(default_buff), "Output Width: %u px",
+		 (unsigned int)((double)self->cell_width / scale));
+	gtk_label_set_text(self->x_output_label, default_buff);
+	snprintf(default_buff, sizeof(default_buff), "Output Height: %u px",
+		 (unsigned int)((double)self->cell_height / scale));
+	gtk_label_set_text(self->y_output_label, default_buff);
+}
+
+static void scale_value_changed(GtkRange *range, gpointer user_data)
+{
+	(void)range;
+	RendererSettingsDialog *dialog;
+
+	dialog = RENDERER_SETTINGS_DIALOG(user_data);
+	renderer_settings_dialog_update_labels(dialog);
+}
+
+static void renderer_settings_dialog_init(RendererSettingsDialog *self)
+{
+	GtkBuilder *builder;
+	GtkWidget *box;
+	GtkDialog *dialog;
+
+	dialog = &self->parent;
+
+	builder = gtk_builder_new_from_resource("/dialog.glade");
+	box = GTK_WIDGET(gtk_builder_get_object(builder, "dialog-box"));
+	self->radio_latex = GTK_WIDGET(gtk_builder_get_object(builder, "latex-radio"));
+	self->radio_cairo_pdf = GTK_WIDGET(gtk_builder_get_object(builder, "cairo-pdf-radio"));
+	self->radio_cairo_svg = GTK_WIDGET(gtk_builder_get_object(builder, "cairo-svg-radio"));
+	self->scale = GTK_WIDGET(gtk_builder_get_object(builder, "dialog-scale"));
+	self->standalone_check = GTK_WIDGET(gtk_builder_get_object(builder, "standalone-check"));
+	self->layer_check = GTK_WIDGET(gtk_builder_get_object(builder, "layer-check"));
+	self->shape_drawing = GTK_DRAWING_AREA(gtk_builder_get_object(builder, "shape-drawer"));
+	self->x_label = GTK_LABEL(gtk_builder_get_object(builder, "x-label"));
+	self->y_label = GTK_LABEL(gtk_builder_get_object(builder, "y-label"));
+	self->x_output_label = GTK_LABEL(gtk_builder_get_object(builder, "x-output-label"));
+	self->y_output_label = GTK_LABEL(gtk_builder_get_object(builder, "y-output-label"));
+
+	gtk_dialog_add_buttons(dialog, "Cancel", GTK_RESPONSE_CANCEL, "OK", GTK_RESPONSE_OK, NULL);
+	gtk_container_add(GTK_CONTAINER(gtk_dialog_get_content_area(dialog)), box);
+	gtk_window_set_title(GTK_WINDOW(self), "Renderer Settings");
+
+	g_signal_connect(self->radio_latex, "toggled", G_CALLBACK(latex_render_callback), (gpointer)self);
+	g_signal_connect(G_OBJECT(self->shape_drawing),
+				"draw", G_CALLBACK(shape_drawer_drawing_callback), (gpointer)self);
+
+	g_signal_connect(self->scale, "value-changed", G_CALLBACK(scale_value_changed), (gpointer)self);
+
+	/* Default values */
+	self->cell_width = 1;
+	self->cell_height = 1;
+	self->unit_in_meters = 1E-6;
+	renderer_settings_dialog_update_labels(self);
+
+	g_object_unref(builder);
+}
+
+RendererSettingsDialog *renderer_settings_dialog_new(GtkWindow *parent)
+{
+	RendererSettingsDialog *res;
+
+	res = RENDERER_SETTINGS_DIALOG(g_object_new(RENDERER_TYPE_SETTINGS_DIALOG, NULL));
+	if (res && parent) {
+		gtk_window_set_transient_for(GTK_WINDOW(res), parent);
+	}
+	return res;
+}
+
+void renderer_settings_dialog_get_settings(RendererSettingsDialog *dialog, struct render_settings *settings)
+{
+
+	if (!settings || !dialog)
+		return;
+	settings->scale = gtk_range_get_value(GTK_RANGE(dialog->scale));
+
+	/* Get active radio button selection */
+	if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(dialog->radio_latex)) == TRUE) {
+		settings->renderer = RENDERER_LATEX_TIKZ;
+	} else if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(dialog->radio_cairo_pdf)) == TRUE) {
+		settings->renderer = RENDERER_CAIROGRAPHICS_PDF;
+	} else if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(dialog->radio_cairo_svg)) == TRUE) {
+		settings->renderer = RENDERER_CAIROGRAPHICS_SVG;
+	}
+
+	settings->tex_pdf_layers = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(dialog->layer_check));
+	settings->tex_standalone = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(dialog->standalone_check));
+}
+
+void renderer_settings_dialog_set_settings(RendererSettingsDialog *dialog, struct render_settings *settings)
+{
+	if (!settings || !dialog)
+		return;
+
+	gtk_range_set_value(GTK_RANGE(dialog->scale), settings->scale);
+	gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(dialog->layer_check), settings->tex_pdf_layers);
+	gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(dialog->standalone_check), settings->tex_standalone);
+
+	switch (settings->renderer) {
+	case RENDERER_LATEX_TIKZ:
+		gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(dialog->radio_latex), TRUE);
+		show_tex_options(dialog);
+		break;
+	case RENDERER_CAIROGRAPHICS_PDF:
+		hide_tex_options(dialog);
+		gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(dialog->radio_cairo_pdf), TRUE);
+		break;
+	case RENDERER_CAIROGRAPHICS_SVG:
+		hide_tex_options(dialog);
+		gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(dialog->radio_cairo_svg), TRUE);
+		break;
+	}
+}
+
+void renderer_settings_dialog_set_cell_width(RendererSettingsDialog *dialog, unsigned int width)
+{
+	if (!dialog)
+		return;
+
+	if (width == 0)
+		width = 1;
+
+	dialog->cell_width = width;
+	renderer_settings_dialog_update_labels(dialog);
+}
+
+void renderer_settings_dialog_set_cell_height(RendererSettingsDialog *dialog, unsigned int height)
+{
+	if (!dialog)
+		return;
+
+	if (height == 0)
+		height = 1;
+
+	dialog->cell_height = height;
+	renderer_settings_dialog_update_labels(dialog);
+}
+
+void renderer_settings_dialog_set_database_unit_scale(RendererSettingsDialog *dialog, double unit_in_meters)
+{
+	if (!dialog)
+		return;
+
+	if (unit_in_meters < 0)
+		unit_in_meters *= -1;
+
+	dialog->unit_in_meters = unit_in_meters;
+	renderer_settings_dialog_update_labels(dialog);
+}
+
+/** @} */

widgets/layer-element.c

@@ -17,7 +17,26 @@
  * along with GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "layer-element.h"
+/*
+ * The drag and drop implementation is adapted from
+ * https://gitlab.gnome.org/GNOME/gtk/blob/gtk-3-22/tests/testlist3.c
+ *
+ * Thanks to the GTK3 people for creating these examples.
+ */
+
+/**
+ * @file layer-element.c
+ * @brief Implementation of the layer element used for configuring layer colors etc.
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup LayerElement
+ * @ingroup Widgets
+ * @{
+ */
+
+#include <gds-render/widgets/layer-element.h>
 
 G_DEFINE_TYPE(LayerElement, layer_element, GTK_TYPE_LIST_BOX_ROW)
 
@@ -39,77 +58,6 @@ static void layer_element_class_init(LayerElementClass *klass)
 	oclass->constructed = layer_element_constructed;
 }
 
-static GtkTargetEntry entries[] = {
-	{ "GTK_LIST_BOX_ROW", GTK_TARGET_SAME_APP, 0 }
-};
-
-static void layer_element_drag_begin(GtkWidget *widget,
-				     GdkDragContext *context,
-				     gpointer data)
-{
-	GtkWidget *row;
-	GtkAllocation alloc;
-	cairo_surface_t *surface;
-	cairo_t *cr;
-	int x, y;
-
-	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);
-}
-
-static void layer_element_drag_data_get(GtkWidget *widget,
-					GdkDragContext *context,
-					GtkSelectionData *selection_data,
-					guint info,
-					guint time,
-					gpointer data)
-{
-	gtk_selection_data_set(selection_data, gdk_atom_intern_static_string("GTK_LIST_BOX_ROW"),
-			       32, (const guchar *)&widget, sizeof(gpointer));
-}
-
-static void layer_element_drag_data_received(GtkWidget        *widget,
-					     GdkDragContext   *context,
-					     gint              x,
-					     gint              y,
-					     GtkSelectionData *selection_data,
-					     guint             info,
-					     guint32           time,
-					     gpointer          data)
-{
-	GtkWidget *target;
-	GtkWidget *row;
-	GtkWidget *source;
-	int pos;
-
-	target = widget;
-
-	pos = gtk_list_box_row_get_index (GTK_LIST_BOX_ROW (target));
-	row = (gpointer) *(gpointer *)gtk_selection_data_get_data (selection_data);
-	source = gtk_widget_get_ancestor (row, GTK_TYPE_LIST_BOX_ROW);
-
-	if (source == target)
-		return;
-
-	g_object_ref (source);
-	gtk_container_remove (GTK_CONTAINER (gtk_widget_get_parent (source)), source);
-	gtk_list_box_insert (GTK_LIST_BOX (gtk_widget_get_parent (target)), source, pos);
-	g_object_unref (source);
-}
-
 static void layer_element_init(LayerElement *self)
 {
 	GtkBuilder *builder;
@@ -125,13 +73,6 @@ static void layer_element_init(LayerElement *self)
 	self->priv.name = GTK_ENTRY(gtk_builder_get_object(builder, "entry"));
 	self->priv.event_handle = GTK_EVENT_BOX(gtk_builder_get_object(builder, "event-box"));
 
-	/* Setup drag and drop */
-	gtk_drag_source_set(GTK_WIDGET(self->priv.event_handle), GDK_BUTTON1_MASK, entries, 1, GDK_ACTION_MOVE);
-	g_signal_connect(self->priv.event_handle, "drag-begin", G_CALLBACK(layer_element_drag_begin), NULL);
-	g_signal_connect(self->priv.event_handle, "drag-data-get", G_CALLBACK(layer_element_drag_data_get), NULL);
-	gtk_drag_dest_set(GTK_WIDGET(self), GTK_DEST_DEFAULT_ALL, entries, 1, GDK_ACTION_MOVE);
-	g_signal_connect(GTK_WIDGET(self), "drag-data-received", G_CALLBACK(layer_element_drag_data_received), NULL);
-
 	g_object_unref(builder);
 }
 
@@ -180,10 +121,30 @@ void layer_element_get_color(LayerElement *elem, GdkRGBA *rgba)
 {
 	if (!rgba)
 		return;
+
 	gtk_color_chooser_get_rgba(GTK_COLOR_CHOOSER(elem->priv.color), rgba);
 }
 
 void layer_element_set_color(LayerElement *elem, GdkRGBA *rgba)
 {
+	if (!elem || !rgba)
+		return;
+
 	gtk_color_chooser_set_rgba(GTK_COLOR_CHOOSER(elem->priv.color), rgba);
 }
+
+void layer_element_set_dnd_callbacks(LayerElement *elem, struct layer_element_dnd_data *data)
+{
+	if (!elem || !data)
+		return;
+
+	/* Setup drag and drop */
+	gtk_style_context_add_class (gtk_widget_get_style_context(GTK_WIDGET(elem)), "row");
+	gtk_drag_source_set(GTK_WIDGET(elem->priv.event_handle), GDK_BUTTON1_MASK, data->entries, data->entry_count, GDK_ACTION_MOVE);
+	g_signal_connect(elem->priv.event_handle, "drag-begin", G_CALLBACK(data->drag_begin), NULL);
+	g_signal_connect(elem->priv.event_handle, "drag-data-get", G_CALLBACK(data->drag_data_get), NULL);
+	g_signal_connect(elem->priv.event_handle, "drag-end", G_CALLBACK(data->drag_end), NULL);
+
+}
+
+/** @} */