export-image.c

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/*
 * gEDA - GNU Electronic Design Automation
 * This file is a part of gerbv.
 *
 *   Copyright (C) 2000-2002 Stefan Petersen (spe@stacken.kth.se)
 *
 * Contributed by Dino Ghilardi <dino.ghilardi@ieee.org>
 *
 * $Id$
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
 */
 
#include "gerbv.h"
#include "common.h"
 
#include <math.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <png.h>
 
#include "render.h"
 
#include "draw.h"
#include <cairo.h>
#include <cairo-pdf.h>
#include <cairo-ps.h>
#include <cairo-svg.h>
 
void
exportimage_render_to_surface_and_destroy(
    gerbv_project_t* gerbvProject, cairo_surface_t* cSurface, gerbv_render_info_t* renderInfo, const gchar* filename
) {
    cairo_t* cairoTarget = cairo_create(cSurface);
 
    gerbv_render_all_layers_to_cairo_target_for_vector_output(gerbvProject, cairoTarget, renderInfo);
    cairo_destroy(cairoTarget);
    cairo_surface_destroy(cSurface);
}
 
gerbv_render_info_t
gerbv_export_autoscale_project(gerbv_project_t* gerbvProject) {
    gerbv_render_size_t bb;
    gerbv_render_get_boundingbox(gerbvProject, &bb);
    // add a border around the bounding box
    gfloat tempWidth  = bb.right - bb.left;
    gfloat tempHeight = bb.bottom - bb.top;
    bb.right += (tempWidth * 0.05);
    bb.left -= (tempWidth * 0.05);
    bb.bottom += (tempHeight * 0.05);
    bb.top -= (tempHeight * 0.05);
    float width  = bb.right - bb.left + 0.001;  // Plus a little extra to prevent from
    float height = bb.bottom - bb.top + 0.001;  // missing items due to round-off errors
 
    gerbv_render_info_t renderInfo = { 72,         72,         bb.left, bb.top, GERBV_RENDER_TYPE_CAIRO_HIGH_QUALITY,
                                       width * 72, height * 72 };
    return renderInfo;
}
 
void
gerbv_export_png_file_from_project_autoscaled(
    gerbv_project_t* gerbvProject, int widthInPixels, int heightInPixels, const gchar* filename
) {
    gerbv_render_info_t renderInfo = {
        1, 1, 0, 0, GERBV_RENDER_TYPE_CAIRO_HIGH_QUALITY, widthInPixels, heightInPixels
    };
 
    gerbv_render_zoom_to_fit_display(gerbvProject, &renderInfo);
    gerbv_export_png_file_from_project(gerbvProject, &renderInfo, filename);
}
 
void
gerbv_export_png_file_from_project(
    gerbv_project_t* gerbvProject, gerbv_render_info_t* renderInfo, const gchar* filename
) {
    cairo_surface_t* cSurface =
        cairo_image_surface_create(CAIRO_FORMAT_ARGB32, renderInfo->displayWidth, renderInfo->displayHeight);
    cairo_t* cairoTarget = cairo_create(cSurface);
    gerbv_render_all_layers_to_cairo_target(gerbvProject, cairoTarget, renderInfo);
    if (CAIRO_STATUS_SUCCESS != cairo_surface_write_to_png(cSurface, filename)) {
        GERB_COMPILE_ERROR(_("Exporting error to file \"%s\""), filename);
    }
    cairo_destroy(cairoTarget);
    cairo_surface_destroy(cSurface);
}
 
void
gerbv_export_pdf_file_from_project_autoscaled(gerbv_project_t* gerbvProject, const gchar* filename) {
    gerbv_render_info_t renderInfo = gerbv_export_autoscale_project(gerbvProject);
    gerbv_export_pdf_file_from_project(gerbvProject, &renderInfo, filename);
}
 
void
gerbv_export_pdf_file_from_project(
    gerbv_project_t* gerbvProject, gerbv_render_info_t* renderInfo, const gchar* filename
) {
    cairo_surface_t* cSurface = cairo_pdf_surface_create(filename, renderInfo->displayWidth, renderInfo->displayHeight);
 
    exportimage_render_to_surface_and_destroy(gerbvProject, cSurface, renderInfo, filename);
}
 
void
gerbv_export_postscript_file_from_project_autoscaled(gerbv_project_t* gerbvProject, const gchar* filename) {
    gerbv_render_info_t renderInfo = gerbv_export_autoscale_project(gerbvProject);
    gerbv_export_postscript_file_from_project(gerbvProject, &renderInfo, filename);
}
 
void
gerbv_export_postscript_file_from_project(
    gerbv_project_t* gerbvProject, gerbv_render_info_t* renderInfo, const gchar* filename
) {
    cairo_surface_t* cSurface = cairo_ps_surface_create(filename, renderInfo->displayWidth, renderInfo->displayHeight);
    exportimage_render_to_surface_and_destroy(gerbvProject, cSurface, renderInfo, filename);
}
 
void
gerbv_export_svg_file_from_project_autoscaled(gerbv_project_t* gerbvProject, const gchar* filename) {
    gerbv_render_info_t renderInfo = gerbv_export_autoscale_project(gerbvProject);
    gerbv_export_svg_file_from_project(gerbvProject, &renderInfo, filename);
}
 
void
gerbv_export_svg_file_from_project(
    gerbv_project_t* gerbvProject, gerbv_render_info_t* renderInfo, const gchar* filename
) {
    cairo_surface_t* cSurface = cairo_svg_surface_create(filename, renderInfo->displayWidth, renderInfo->displayHeight);
    exportimage_render_to_surface_and_destroy(gerbvProject, cSurface, renderInfo, filename);
}