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/* $Id$ */
/*
libg3d - 3D object loading library
Copyright (C) 2005-2009 Markus Dahms <mad@automagically.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <g3d/config.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <gdk/gdk.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <g3d/types.h>
#include <g3d/stream.h>
static gboolean gdkpixbuf_init(void);
static gboolean gdkpixbuf_postprocess(GdkPixbuf *pixbuf, G3DImage *image,
const gchar *uri);
#define BUFSIZE 1024
EAPI
gboolean plugin_load_image_from_stream(G3DContext *context, G3DStream *stream,
G3DImage *image, gpointer user_data)
{
GdkPixbuf *pixbuf;
GdkPixbufLoader *loader;
GError *error = NULL;
guint8 buffer[BUFSIZE];
gsize n;
gboolean retval;
if(!gdkpixbuf_init())
return FALSE;
loader = gdk_pixbuf_loader_new();
if (NULL == loader)
{
g_warning("gdkpixbuf - plugin_load_image_from_stream(): no loader");
return FALSE;
}
while(!g3d_stream_eof(stream)) {
n = g3d_stream_read(stream, buffer, BUFSIZE);
if(0 >= n)
break;
if(!gdk_pixbuf_loader_write(loader, buffer, n, &error)) {
g_warning("error loading image data from stream: %s",
error->message);
g_error_free(error);
g_object_unref(loader);
return FALSE;
}
}
if(!gdk_pixbuf_loader_close(loader, &error)) {
g_warning("error loading image data from stream: %s",
error->message);
g_error_free(error);
g_object_unref(loader);
return FALSE;
}
pixbuf = gdk_pixbuf_loader_get_pixbuf(loader);
gdk_pixbuf_ref(pixbuf);
retval = gdkpixbuf_postprocess(pixbuf, image, stream->uri);
g_object_unref(loader);
return retval;
}
EAPI
gchar *plugin_description(G3DContext *context)
{
return g_strdup("Read most image formats using the GdkPixbuf library.");
}
EAPI
gchar **plugin_extensions(G3DContext *context)
{
gchar *extensions = g_strdup("");
gchar **retval;
gchar *tmp, **ext;
GSList *fitem;
GdkPixbufFormat *format;
fitem = gdk_pixbuf_get_formats();
while(fitem)
{
gboolean doit = TRUE;
format = (GdkPixbufFormat *)fitem->data;
ext = gdk_pixbuf_format_get_extensions(format);
if (0 == g_strcmp0("bmp", *ext))
doit = FALSE;
else if (0 == g_strcmp0("jpg", *ext))
doit = FALSE;
else if (0 == g_strcmp0("jpeg", *ext))
doit = FALSE;
else if (0 == g_strcmp0("jfif", *ext))
doit = FALSE;
else if (0 == g_strcmp0("jif", *ext))
doit = FALSE;
if (doit)
{
tmp = g_strdup_printf("%s%s%s", extensions, strlen(extensions) ? ":" : "", g_strjoinv(":", ext));
g_free(extensions);
extensions = tmp;
}
fitem = fitem->next;
}
retval = g_strsplit(extensions, ":", 0);
g_free(extensions);
return retval;
}
/*****************************************************************************/
static gboolean gdkpixbuf_init(void)
{
static gboolean init = TRUE;
if(init) {
/* initialize GDK */
/* FIXME: problem if already initialized with gtk_init()? */
gint argc = 0;
if(!gdk_init_check(&argc, NULL))
return FALSE;
init = FALSE;
}
return TRUE;
}
static gboolean gdkpixbuf_postprocess(GdkPixbuf *pixbuf, G3DImage *image,
const gchar *uri)
{
guint32 x, y, nchannels;
guchar *p;
if(gdk_pixbuf_get_colorspace(pixbuf) != GDK_COLORSPACE_RGB) {
g_warning("GdkPixbuf: %s: colorspace is not RGB", uri);
gdk_pixbuf_unref(pixbuf);
return FALSE;
}
nchannels = gdk_pixbuf_get_n_channels(pixbuf);
if(nchannels < 3)
{
g_warning("GdkPixbuf: %s: has only %d channels", uri,
gdk_pixbuf_get_n_channels(pixbuf));
gdk_pixbuf_unref(pixbuf);
return FALSE;
}
image->width = gdk_pixbuf_get_width(pixbuf);
image->height = gdk_pixbuf_get_height(pixbuf);
image->depth = 32;
image->name = g_path_get_basename(uri);
image->pixeldata = g_new0(guint8, image->width * image->height * 4);
for(y = 0; y < image->height; y ++)
for(x = 0; x < image->width; x ++)
{
p = gdk_pixbuf_get_pixels(pixbuf) + y *
gdk_pixbuf_get_rowstride(pixbuf) + x * nchannels;
image->pixeldata[(y * image->width + x) * 4 + 0] = p[0];
image->pixeldata[(y * image->width + x) * 4 + 1] = p[1];
image->pixeldata[(y * image->width + x) * 4 + 2] = p[2];
if(gdk_pixbuf_get_n_channels(pixbuf) >= 4)
image->pixeldata[(y * image->width + x) * 4 + 3] = p[3];
}
/* set alpha to 1.0 */
if(gdk_pixbuf_get_n_channels(pixbuf) < 4)
for(y = 0; y < image->height; y ++)
for(x = 0; x < image->width; x ++)
image->pixeldata[(y * image->width + x) * 4 + 3] = 0xFF;
gdk_pixbuf_unref(pixbuf);
#if DEBUG > 0
g_print("GdkPixbuf: image '%s' loaded (%dx%d)\n",
image->name, image->width, image->height);
#endif
return TRUE;
}
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