src/exportimage.c

   1 /*
   2  * gEDA - GNU Electronic Design Automation
   3  * This file is a part of gerbv.
   4  *
   5  *   Copyright (C) 2000-2002 Stefan Petersen (spe@stacken.kth.se)
   6  *
   7  * Contributed by Dino Ghilardi <dino.ghilardi@ieee.org>
   8  *
   9  * $Id$
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
  24  */
  25
  26 /** \file exportimage.c
  27     \brief This file contains image exporting functions for exporting to PNG, PDF, SVG, and Postscript formats
  28     \ingroup libgerbv
  29 */
  30
  31 #ifdef HAVE_CONFIG_H
  32 #include <config.h>
  33 #endif
  34
  35 #ifdef HAVE_UNISTD_H
  36 #include <unistd.h>
  37 #endif
  38
  39 #include <math.h>
  40 #include <gdk-pixbuf/gdk-pixbuf.h>
  41 #include <png.h>
  42
  43 #include "gerbv.h"
  44
  45 #include "draw.h"
  46 #include <cairo.h>
  47 #include <cairo-pdf.h>
  48 #include <cairo-ps.h>
  49 #include <cairo-svg.h>
  50
  51 extern gerbv_render_info_t screenRenderInfo;
  52
  53 void exportimage_render_to_surface_and_destroy (gerbv_project_t *gerbvProject,
  54                 cairo_surface_t *cSurface, gerbv_render_info_t *renderInfo, gchar const* filename) {
  55       cairo_t *cairoTarget = cairo_create (cSurface);
  56
  57       gerbv_render_all_layers_to_cairo_target_for_vector_output (gerbvProject, cairoTarget, renderInfo);
  58         cairo_destroy (cairoTarget);
  59         cairo_surface_destroy (cSurface);
  60 }
  61
  62 gerbv_render_info_t gerbv_export_autoscale_project (gerbv_project_t *gerbvProject) {
  63         gerbv_render_size_t bb;
  64         gerbv_render_get_boundingbox(gerbvProject, &bb);
  65         // add a border around the bounding box
  66         gfloat tempWidth = bb.right  - bb.left;
  67         gfloat tempHeight = bb.bottom - bb.top;
  68         bb.right += (tempWidth*0.05);
  69         bb.left -= (tempWidth*0.05);
  70         bb.bottom += (tempHeight*0.05);
  71         bb.top -= (tempHeight*0.05);
  72         float width  = bb.right  - bb.left + 0.001;     // Plus a little extra to prevent from
  73         float height = bb.bottom - bb.top + 0.001; // missing items due to round-off errors
  74
  75         gerbv_render_info_t renderInfo = {72, 72, bb.left, bb.top, 3, width*72, height*72};
  76         return renderInfo;
  77 }
  78
  79 void gerbv_export_png_file_from_project_autoscaled (gerbv_project_t *gerbvProject, int widthInPixels,
  80                 int heightInPixels, gchar const* filename) {
  81         gerbv_render_info_t renderInfo = {1, 1, 0, 0, 3, widthInPixels, heightInPixels};
  82
  83         gerbv_render_zoom_to_fit_display (gerbvProject, &renderInfo);
  84         gerbv_export_png_file_from_project (gerbvProject, &renderInfo, filename);
  85 }
  86
  87 void gerbv_export_png_file_from_project (gerbv_project_t *gerbvProject, gerbv_render_info_t *renderInfo, gchar const* filename) {
  88         cairo_surface_t *cSurface = cairo_image_surface_create  (CAIRO_FORMAT_ARGB32,
  89                                                          renderInfo->displayWidth, renderInfo->displayHeight);
  90         cairo_t *cairoTarget = cairo_create (cSurface);
  91         gerbv_render_all_layers_to_cairo_target (gerbvProject, cairoTarget, renderInfo);
  92         cairo_surface_write_to_png (cSurface, filename);
  93         cairo_destroy (cairoTarget);
  94         cairo_surface_destroy (cSurface);
  95 }
  96
  97 void gerbv_export_pdf_file_from_project_autoscaled (gerbv_project_t *gerbvProject, gchar const* filename) {
  98         gerbv_render_info_t renderInfo = gerbv_export_autoscale_project(gerbvProject);
  99         gerbv_export_pdf_file_from_project (gerbvProject, &renderInfo, filename);
 100 }
 101
 102 void gerbv_export_pdf_file_from_project (gerbv_project_t *gerbvProject, gerbv_render_info_t *renderInfo,
 103                 gchar const* filename) {
 104         cairo_surface_t *cSurface = cairo_pdf_surface_create (filename, renderInfo->displayWidth,
 105                                                                 renderInfo->displayHeight);
 106
 107       exportimage_render_to_surface_and_destroy (gerbvProject, cSurface, renderInfo, filename);
 108 }
 109
 110 void gerbv_export_postscript_file_from_project_autoscaled (gerbv_project_t *gerbvProject, gchar const* filename) {
 111         gerbv_render_info_t renderInfo = gerbv_export_autoscale_project(gerbvProject);
 112         gerbv_export_postscript_file_from_project (gerbvProject, &renderInfo, filename);
 113 }
 114
 115 void gerbv_export_postscript_file_from_project (gerbv_project_t *gerbvProject, gerbv_render_info_t *renderInfo,
 116                 gchar const* filename) {
 117         cairo_surface_t *cSurface = cairo_ps_surface_create (filename, renderInfo->displayWidth,
 118                                                                 renderInfo->displayHeight);
 119       exportimage_render_to_surface_and_destroy (gerbvProject, cSurface, renderInfo, filename);
 120 }
 121
 122 void gerbv_export_svg_file_from_project_autoscaled (gerbv_project_t *gerbvProject, gchar const* filename) {
 123         gerbv_render_info_t renderInfo = gerbv_export_autoscale_project(gerbvProject);
 124         gerbv_export_svg_file_from_project (gerbvProject, &renderInfo, filename);
 125 }
 126
 127 void gerbv_export_svg_file_from_project (gerbv_project_t *gerbvProject, gerbv_render_info_t *renderInfo,
 128                 gchar const* filename) {
 129         cairo_surface_t *cSurface = cairo_svg_surface_create (filename, renderInfo->displayWidth,
 130                                                                 renderInfo->displayHeight);
 131       exportimage_render_to_surface_and_destroy (gerbvProject, cSurface, renderInfo, filename);
 132 }
 133