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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*-
test-rsvg.c: Command line utility for exercising rsvg.
Copyright (C) 2000 Eazel, Inc.
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 02111-1307, USA.
Author: Raph Levien <raph@artofcode.com>
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <png.h>
#include <popt.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "rsvg.h"
/* The following routine is lifted wholesale from nautilus-icon-factory.c.
It should find a permanent home somewhere else, at which point it should
be deleted here and simply linked. -RLL
*/
/* utility routine for saving a pixbuf to a png file.
* This was adapted from Iain Holmes' code in gnome-iconedit, and probably
* should be in a utility library, possibly in gdk-pixbuf itself.
*/
static gboolean
save_pixbuf_to_file (GdkPixbuf *pixbuf, char *filename)
{
FILE *handle;
char *buffer;
gboolean has_alpha;
int width, height, depth, rowstride;
guchar *pixels;
png_structp png_ptr;
png_infop info_ptr;
png_text text[2];
int i;
g_return_val_if_fail (pixbuf != NULL, FALSE);
g_return_val_if_fail (filename != NULL, FALSE);
g_return_val_if_fail (filename[0] != '\0', FALSE);
if (!strcmp (filename, "-"))
handle = stdout;
else
handle = fopen (filename, "wb");
if (handle == NULL) {
return FALSE;
}
png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (png_ptr == NULL) {
fclose (handle);
return FALSE;
}
info_ptr = png_create_info_struct (png_ptr);
if (info_ptr == NULL) {
png_destroy_write_struct (&png_ptr, (png_infopp)NULL);
fclose (handle);
return FALSE;
}
if (setjmp (png_ptr->jmpbuf)) {
png_destroy_write_struct (&png_ptr, &info_ptr);
fclose (handle);
return FALSE;
}
png_init_io (png_ptr, handle);
has_alpha = gdk_pixbuf_get_has_alpha (pixbuf);
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
depth = gdk_pixbuf_get_bits_per_sample (pixbuf);
pixels = gdk_pixbuf_get_pixels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
png_set_IHDR (png_ptr, info_ptr, width, height,
depth, PNG_COLOR_TYPE_RGB_ALPHA,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
/* Some text to go with the png image */
text[0].key = "Title";
text[0].text = filename;
text[0].compression = PNG_TEXT_COMPRESSION_NONE;
text[1].key = "Software";
text[1].text = "Test-Rsvg";
text[1].compression = PNG_TEXT_COMPRESSION_NONE;
png_set_text (png_ptr, info_ptr, text, 2);
/* Write header data */
png_write_info (png_ptr, info_ptr);
/* if there is no alpha in the data, allocate buffer to expand into */
if (has_alpha) {
buffer = NULL;
} else {
buffer = g_malloc(4 * width);
}
/* pump the raster data into libpng, one scan line at a time */
for (i = 0; i < height; i++) {
if (has_alpha) {
png_bytep row_pointer = pixels;
png_write_row (png_ptr, row_pointer);
} else {
/* expand RGB to RGBA using an opaque alpha value */
int x;
char *buffer_ptr = buffer;
char *source_ptr = pixels;
for (x = 0; x < width; x++) {
*buffer_ptr++ = *source_ptr++;
*buffer_ptr++ = *source_ptr++;
*buffer_ptr++ = *source_ptr++;
*buffer_ptr++ = 255;
}
png_write_row (png_ptr, (png_bytep) buffer);
}
pixels += rowstride;
}
png_write_end (png_ptr, info_ptr);
png_destroy_write_struct (&png_ptr, &info_ptr);
g_free (buffer);
if (handle != stdout)
fclose (handle);
return TRUE;
}
int
main (int argc, char **argv)
{
FILE *f;
char *out_fn;
GdkPixbuf *pixbuf;
char *zoom_str = "1.0";
poptContext optCtx;
struct poptOption optionsTable[] = {
{ "zoom", 'z', POPT_ARG_STRING, &zoom_str, 0, NULL, "zoom factor" },
POPT_AUTOHELP
{ NULL, 0, 0, NULL, 0 }
};
char c;
const char * const *args;
optCtx = poptGetContext ("test-rsvg", argc, (const char **)argv, optionsTable, 0);
c = poptGetNextOpt (optCtx);
args = poptGetArgs (optCtx);
if (args == NULL || args[0] == NULL) {
f = stdin;
out_fn = "-";
} else {
f = fopen(args[0], "r");
if (f == NULL) {
fprintf(stderr, "Error opening source file %s\n", argv[0]);
}
if (args[1] == NULL)
out_fn = "-";
else
out_fn = (char *)args[1];
}
pixbuf = rsvg_render_file (f, atof (zoom_str));
if (f != stdin)
fclose(f);
if (pixbuf != NULL)
save_pixbuf_to_file (pixbuf, out_fn);
else {
fprintf (stderr, "Error loading SVG file.\n");
return 1;
}
return 0;
}
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