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/*
* io-tiff.c: GdkPixbuf I/O for TIFF files.
* Copyright (C) 1999 Mark Crichton
* Author: Mark Crichton <crichton@gimp.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Cambridge, MA 02139, USA.
*
*/
/* Following code (almost) blatantly ripped from Imlib */
#include <config.h>
#include <stdio.h>
#include <string.h>
#include <glib.h>
#include <tiffio.h>
#include "gdk-pixbuf.h"
/*#include "gdk-pixbuf-io.h" */
GdkPixbuf *
image_load (FILE *f)
{
GdkPixbuf *pixbuf;
TIFF *tiff;
art_u8 *pixels, *tmppix;
gint w, h, x, y, num_pixs, fd;
uint32 *rast, *tmp_rast;
g_return_val_if_fail(f != NULL, NULL);
fd = fileno(f);
tiff = TIFFFdOpen(fd, "libpixbuf-tiff", "r");
if (!tiff)
return NULL;
TIFFGetField(tiff, TIFFTAG_IMAGEWIDTH, &w);
TIFFGetField(tiff, TIFFTAG_IMAGELENGTH, &h);
num_pixs = w * h;
/* Yes, it needs to be _TIFFMalloc... */
rast = (uint32 *) _TIFFmalloc(num_pixs * sizeof(uint32));
if (!rast) {
TIFFClose(tiff);
return NULL;
}
if (TIFFReadRGBAImage(tiff, w, h, rast, 0)) {
pixels = art_alloc(num_pixs * 4);
if (!pixels) {
_TIFFfree(rast);
TIFFClose(tiff);
return NULL;
}
tmppix = pixels;
for (y = 0; y < h; y++) {
/* Unexplainable...are tiffs backwards? */
/* Also looking at the GIMP plugin, this
* whole reading thing can be a bit more
* robust.
*/
tmp_rast = rast + ((h - y - 1) * w);
for (x = 0; x < w; x++) {
tmppix[0] = TIFFGetR(*tmp_rast);
tmppix[1] = TIFFGetG(*tmp_rast);
tmppix[2] = TIFFGetB(*tmp_rast);
tmppix[3] = TIFFGetA(*tmp_rast);
tmp_rast++;
tmppix += 4;
}
}
}
_TIFFfree(rast);
TIFFClose(tiff);
pixbuf = gdk_pixbuf_new (art_pixbuf_new_rgba (pixels, w, h, (w * 4)),
NULL);
if (!pixbuf)
art_free (pixels);
return pixbuf;
}
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