pidgin/pidgin

closing merged branch
port-changes-from-branch-2.x.y-to-default
13 months ago, Gary Kramlich
2f836435c33c
closing merged branch
/* pidgin
*
* Pidgin is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#include "pidgin/pidgingdkpixbuf.h"
GdkPixbuf *
pidgin_gdk_pixbuf_new_from_image(PurpleImage *image, GError **error) {
GdkPixbufLoader *loader = NULL;
GdkPixbuf *pixbuf = NULL;
GBytes *data = NULL;
gboolean success = FALSE;
g_return_val_if_fail(PURPLE_IS_IMAGE(image), NULL);
data = purple_image_get_contents(image);
success = gdk_pixbuf_loader_write_bytes(loader, data, error);
g_bytes_unref(data);
if(success) {
if(error != NULL && *error != NULL) {
g_object_unref(G_OBJECT(loader));
return NULL;
}
if(gdk_pixbuf_loader_close(loader, error)) {
pixbuf = gdk_pixbuf_loader_get_pixbuf(loader);
if(pixbuf != NULL) {
pixbuf = g_object_ref(pixbuf);
}
}
g_object_unref(G_OBJECT(loader));
}
return pixbuf;
}
void pidgin_gdk_pixbuf_make_round(GdkPixbuf *pixbuf) {
gint width, height, rowstride;
guchar *pixels;
if (!gdk_pixbuf_get_has_alpha(pixbuf)) {
return;
}
width = gdk_pixbuf_get_width(pixbuf);
height = gdk_pixbuf_get_height(pixbuf);
rowstride = gdk_pixbuf_get_rowstride(pixbuf);
pixels = gdk_pixbuf_get_pixels(pixbuf);
if (width < 6 || height < 6) {
return;
}
/* The following code will conver the alpha of the pixel data in all
* corners to look something like the following diagram.
*
* 00 80 c0 FF FF c0 80 00
* 80 FF FF FF FF FF FF 80
* c0 FF FF FF FF FF FF c0
* FF FF FF FF FF FF FF FF
* FF FF FF FF FF FF FF FF
* c0 FF FF FF FF FF FF c0
* 80 FF FF FF FF FF FF 80
* 00 80 c0 FF FF c0 80 00
*/
/* Top left */
pixels[3] = 0;
pixels[7] = 0x80;
pixels[11] = 0xC0;
pixels[rowstride + 3] = 0x80;
pixels[rowstride * 2 + 3] = 0xC0;
/* Top right */
pixels[width * 4 - 1] = 0;
pixels[width * 4 - 5] = 0x80;
pixels[width * 4 - 9] = 0xC0;
pixels[rowstride + (width * 4) - 1] = 0x80;
pixels[(2 * rowstride) + (width * 4) - 1] = 0xC0;
/* Bottom left */
pixels[(height - 1) * rowstride + 3] = 0;
pixels[(height - 1) * rowstride + 7] = 0x80;
pixels[(height - 1) * rowstride + 11] = 0xC0;
pixels[(height - 2) * rowstride + 3] = 0x80;
pixels[(height - 3) * rowstride + 3] = 0xC0;
/* Bottom right */
pixels[height * rowstride - 1] = 0;
pixels[(height - 1) * rowstride - 1] = 0x80;
pixels[(height - 2) * rowstride - 1] = 0xC0;
pixels[height * rowstride - 5] = 0x80;
pixels[height * rowstride - 9] = 0xC0;
}
gboolean
pidgin_gdk_pixbuf_is_opaque(GdkPixbuf *pixbuf) {
gint height, rowstride, i;
guchar *pixels;
guchar *row;
if (!gdk_pixbuf_get_has_alpha(pixbuf)) {
return TRUE;
}
height = gdk_pixbuf_get_height (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
pixels = gdk_pixbuf_get_pixels (pixbuf);
/* check the top row */
row = pixels;
for (i = 3; i < rowstride; i+=4) {
if (row[i] < 0xfe) {
return FALSE;
}
}
/* check the left and right sides */
for (i = 1; i < height - 1; i++) {
row = pixels + (i * rowstride);
if (row[3] < 0xfe || row[rowstride - 1] < 0xfe) {
return FALSE;
}
}
/* check the bottom */
row = pixels + ((height - 1) * rowstride);
for (i = 3; i < rowstride; i += 4) {
if (row[i] < 0xfe) {
return FALSE;
}
}
return TRUE;
}