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gds-render/latex-output/latex-output.c

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/*
* 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.c
* @brief LaTeX output renderer
* @author Mario Hüttel <mario.huettel@gmx.net>
*/
#include "latex-output.h"
#include <math.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;
struct layer_info *lifo;
char *end_str;
for (list = layer_infos; list != NULL; list = list->next) {
lifo = (struct layer_info *)list->data;
g_string_printf(buffer, "\\pgfdeclarelayer{l%d}\n\\definecolor{c%d}{rgb}{%lf,%lf,%lf}\n",
lifo->layer, lifo->layer,
lifo->color.red, lifo->color.green, lifo->color.blue);
WRITEOUT_BUFFER(buffer);
}
g_string_printf(buffer, "\\pgfsetlayers{");
WRITEOUT_BUFFER(buffer);
for (list = layer_infos; list != NULL; list = list->next) {
lifo = (struct layer_info *)list->data;
if (list->next == NULL)
end_str = ",main}";
else
end_str = ",";
g_string_printf(buffer, "l%d%s", lifo->layer, end_str);
WRITEOUT_BUFFER(buffer);
}
fwrite("\n", sizeof(char), 1, tex_file);
}
/**
* @brief Write layer Envirmonment
*
* If the requested layer shall be rendered, this code writes the necessary code
* to open the layer. It also returns the color the layer shall be rendered in.
*
* The followingenvironments are generated:
*
* @code{.tex}
* \begin{pgfonlayer}{<layer>}
* % If pdf layers shall be used also this is enabled:
* \begin{scope}[ocg={ref=<layer>, status=visible,name={<Layer Name>}}]
* @endcode
*
*
* If the layer shall not be rendered, FALSE is returned and the color is not filled in and
* the cod eis not written to the file.
*
* @param tex_file TeX file to write to
* @param color Return of the layer's color
* @param layer Requested layer number
* @param linfo Layer information list containing layer_info structs
* @param buffer Some working buffer
* @return TRUE, if the layer shall be rendered.
* @note The opened environments have to be closed afterwards
*/
static gboolean write_layer_env(FILE *tex_file, GdkRGBA *color, int layer, GList *linfo, GString *buffer)
{
GList *temp;
struct layer_info *inf;
for (temp = linfo; temp != NULL; temp = temp->next) {
inf = (struct layer_info *)temp->data;
if (inf->layer == layer) {
color->alpha = inf->color.alpha;
color->red = inf->color.red;
color->green = inf->color.green;
color->blue = inf->color.blue;
g_string_printf(buffer, "\\begin{pgfonlayer}{l%d}\n\\ifcreatepdflayers\n\\begin{scope}[ocg={ref=%d, status=visible,name={%s}}]\n\\fi\n",
layer, layer, inf->name);
WRITEOUT_BUFFER(buffer);
return TRUE;
}
}
return FALSE;
}
/**
* @brief Writes a graphics object to the specified tex_file
*
* This function opens the layer, writes a graphics object and closes the layer
*
* @param tex_file File to write to
* @param graphics Object to render
* @param linfo Layer information
* @param buffer Working buffer
* @param scale Scale abject down by this value
*/
static void generate_graphics(FILE *tex_file, GList *graphics, GList *linfo, GString *buffer, double scale)
{
GList *temp;
GList *temp_vertex;
struct gds_graphics *gfx;
struct gds_point *pt;
GdkRGBA color;
static const char *line_caps[] = {"butt", "round", "rect"};
for (temp = graphics; temp != NULL; temp = temp->next) {
gfx = (struct gds_graphics *)temp->data;
if (write_layer_env(tex_file, &color, (int)gfx->layer, linfo, buffer) == TRUE) {
/* Layer is defined => create graphics */
if (gfx->gfx_type == GRAPHIC_POLYGON || gfx->gfx_type == GRAPHIC_BOX ) {
g_string_printf(buffer, "\\draw[line width=0.00001 pt, draw={c%d}, fill={c%d}, fill opacity={%lf}] ",
gfx->layer, gfx->layer, color.alpha);
WRITEOUT_BUFFER(buffer);
/* Append vertices */
for (temp_vertex = gfx->vertices; temp_vertex != NULL; temp_vertex = temp_vertex->next) {
pt = (struct gds_point *)temp_vertex->data;
g_string_printf(buffer, "(%lf pt, %lf pt) -- ", ((double)pt->x)/scale, ((double)pt->y)/scale);
WRITEOUT_BUFFER(buffer);
}
g_string_printf(buffer, "cycle;\n");
WRITEOUT_BUFFER(buffer);
} else if (gfx->gfx_type == GRAPHIC_PATH) {
if (g_list_length(gfx->vertices) < 2) {
printf("Cannot write path with less than 2 points\n");
break;
}
if (gfx->path_render_type < 0 || gfx->path_render_type > 2) {
printf("Path type unrecognized. Setting to 'flushed'\n");
gfx->path_render_type = PATH_FLUSH;
}
g_string_printf(buffer, "\\draw[line width=%lf pt, draw={c%d}, opacity={%lf}, cap=%s] ",
gfx->width_absolute/scale, gfx->layer, color.alpha,
line_caps[gfx->path_render_type]);
WRITEOUT_BUFFER(buffer);
/* Append vertices */
for (temp_vertex = gfx->vertices; temp_vertex != NULL; temp_vertex = temp_vertex->next) {
pt = (struct gds_point *)temp_vertex->data;
g_string_printf(buffer, "(%lf pt, %lf pt)%s",
((double)pt->x)/scale,
((double)pt->y)/scale,
(temp_vertex->next ? " -- " : ""));
WRITEOUT_BUFFER(buffer);
}
g_string_printf(buffer, ";\n");
WRITEOUT_BUFFER(buffer);
}
g_string_printf(buffer, "\\ifcreatepdflayers\n\\end{scope}\n\\fi\n\\end{pgfonlayer}\n");
WRITEOUT_BUFFER(buffer);
}
} /* For graphics */
}
/**
* @brief Render cell to file
* @param cell Cell to render
* @param layer_infos Layer information
* @param tex_file File to write to
* @param buffer Working buffer
* @param scale Scale output down by this value
*/
static void render_cell(struct gds_cell *cell, GList *layer_infos, FILE *tex_file, GString *buffer, double scale)
{
GList *list_child;
struct gds_cell_instance *inst;
/* Draw polygons of current cell */
generate_graphics(tex_file, cell->graphic_objs, layer_infos, buffer, scale);
/* Draw polygons of childs */
for (list_child = cell->child_cells; list_child != NULL; list_child = list_child->next) {
inst = (struct gds_cell_instance *)list_child->data;
/* Abort if cell has no reference */
if (!inst->cell_ref)
continue;
/* generate translation scope */
g_string_printf(buffer, "\\begin{scope}[shift={(%lf pt,%lf pt)}]\n",
((double)inst->origin.x)/scale,((double)inst->origin.y)/scale);
WRITEOUT_BUFFER(buffer);
g_string_printf(buffer, "\\begin{scope}[rotate=%lf]\n", inst->angle);
WRITEOUT_BUFFER(buffer);
g_string_printf(buffer, "\\begin{scope}[yscale=%lf, xscale=%lf]\n", (inst->flipped ? -1*inst->magnification : inst->magnification),
inst->magnification);
WRITEOUT_BUFFER(buffer);
render_cell(inst->cell_ref, layer_infos, tex_file, buffer, scale);
g_string_printf(buffer, "\\end{scope}\n");
WRITEOUT_BUFFER(buffer);
g_string_printf(buffer, "\\end{scope}\n");
WRITEOUT_BUFFER(buffer);
g_string_printf(buffer, "\\end{scope}\n");
WRITEOUT_BUFFER(buffer);
}
}
/**
* @brief Renders \p cell with its subcells to TikZ code.
* @note Preferences \p create_pdf_layers and \p standalone_document can be changed in LaTeX code afterwards.
* @param cell Cell to render
* @param layer_infos Layer information
* @param tex_file Destination file
* @param scale Scaling factor. Image will be scaled by scale^-1
* @param create_pdf_layers Default value for pdf OCR layers
* @param standalone_document Default value for standalone document class
*/
void latex_render_cell_to_code(struct gds_cell *cell, GList *layer_infos, FILE *tex_file, double scale,
gboolean create_pdf_layers, gboolean standalone_document)
{
GString *working_line;
if (!tex_file || !layer_infos || !cell)
return;
/* 10 kB Line working buffer should be enough */
working_line = g_string_new_len(NULL, LATEX_LINE_BUFFER_KB*1024);
/* standalone foo */
g_string_printf(working_line, "\\newif\\iftestmode\n\\testmode%s\n",
(standalone_document ? "true" : "false"));
WRITEOUT_BUFFER(working_line);
g_string_printf(working_line, "\\newif\\ifcreatepdflayers\n\\createpdflayers%s\n",
(create_pdf_layers ? "true" : "false"));
WRITEOUT_BUFFER(working_line);
g_string_printf(working_line, "\\iftestmode\n");
WRITEOUT_BUFFER(working_line);
g_string_printf(working_line, "\\documentclass[tikz]{standalone}\n\\usepackage{xcolor}\n\\usetikzlibrary{ocgx}\n\\begin{document}\n");
WRITEOUT_BUFFER(working_line);
g_string_printf(working_line, "\\fi\n");
WRITEOUT_BUFFER(working_line);
/* Write layer definitions */
write_layer_definitions(tex_file, layer_infos, working_line);
/* Open tikz Pictute */
g_string_printf(working_line, "\\begin{tikzpicture}\n");
WRITEOUT_BUFFER(working_line);
/* Generate graphics output */
render_cell(cell, layer_infos, tex_file, working_line, scale);
g_string_printf(working_line, "\\end{tikzpicture}\n");
WRITEOUT_BUFFER(working_line);
g_string_printf(working_line, "\\iftestmode\n");
WRITEOUT_BUFFER(working_line);
g_string_printf(working_line, "\\end{document}\n");
WRITEOUT_BUFFER(working_line);
g_string_printf(working_line, "\\fi\n");
WRITEOUT_BUFFER(working_line);
fflush(tex_file);
g_string_free(working_line, TRUE);
}
/** @} */
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