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/*
* Purple - Internet Messaging Library
* Copyright (C) Pidgin Developers <devel@pidgin.im>
*
* Purple 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, see <https://www.gnu.org/licenses/>.
*/
#include "libpurple/purplegdkpixbuf.h"
#include "debug.h"
void purple_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 convert 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
purple_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;
}
static GObject *purple_gdk_pixbuf_from_data_helper(const guchar *buf, gsize count, gboolean animated)
{
GObject *pixbuf;
GdkPixbufLoader *loader;
GError *error = NULL;
loader = gdk_pixbuf_loader_new();
if (!gdk_pixbuf_loader_write(loader, buf, count, &error) || error) {
purple_debug_warning("gtkutils", "gdk_pixbuf_loader_write() "
"failed with size=%" G_GSIZE_FORMAT ": %s\n", count,
error ? error->message : "(no error message)");
g_clear_error(&error);
g_object_unref(G_OBJECT(loader));
return NULL;
}
if (!gdk_pixbuf_loader_close(loader, &error) || error) {
purple_debug_warning("gtkutils", "gdk_pixbuf_loader_close() "
"failed for image of size %" G_GSIZE_FORMAT ": %s\n", count,
error ? error->message : "(no error message)");
g_clear_error(&error);
g_object_unref(G_OBJECT(loader));
return NULL;
}
if (animated)
pixbuf = G_OBJECT(gdk_pixbuf_loader_get_animation(loader));
else
pixbuf = G_OBJECT(gdk_pixbuf_loader_get_pixbuf(loader));
if (!pixbuf) {
purple_debug_warning("gtkutils", "%s() returned NULL for image "
"of size %" G_GSIZE_FORMAT "\n",
animated ? "gdk_pixbuf_loader_get_animation"
: "gdk_pixbuf_loader_get_pixbuf", count);
g_object_unref(G_OBJECT(loader));
return NULL;
}
g_object_ref(pixbuf);
g_object_unref(G_OBJECT(loader));
return pixbuf;
}
GdkPixbuf *purple_gdk_pixbuf_from_data(const guchar *buf, gsize count)
{
return GDK_PIXBUF(purple_gdk_pixbuf_from_data_helper(buf, count, FALSE));
}
GdkPixbuf *
purple_gdk_pixbuf_from_image(PurpleImage *image)
{
return purple_gdk_pixbuf_from_data(purple_image_get_data(image),
purple_image_get_data_size(image));
}
GdkPixbuf *purple_gdk_pixbuf_new_from_file(const gchar *filename)
{
GdkPixbuf *pixbuf;
GError *error = NULL;
g_return_val_if_fail(filename != NULL, NULL);
g_return_val_if_fail(filename[0] != '\0', NULL);
pixbuf = gdk_pixbuf_new_from_file(filename, &error);
if (!pixbuf || error) {
purple_debug_warning("gtkutils", "gdk_pixbuf_new_from_file() "
"returned %s for file %s: %s\n",
pixbuf ? "something" : "nothing",
filename,
error ? error->message : "(no error message)");
g_clear_error(&error);
g_clear_object(&pixbuf);
return NULL;
}
return pixbuf;
}
GdkPixbuf *purple_gdk_pixbuf_new_from_file_at_size(const char *filename, int width, int height)
{
GdkPixbuf *pixbuf;
GError *error = NULL;
g_return_val_if_fail(filename != NULL, NULL);
g_return_val_if_fail(filename[0] != '\0', NULL);
pixbuf = gdk_pixbuf_new_from_file_at_size(filename,
width, height, &error);
if (!pixbuf || error) {
purple_debug_warning("gtkutils", "gdk_pixbuf_new_from_file_at_size() "
"returned %s for file %s: %s\n",
pixbuf ? "something" : "nothing",
filename,
error ? error->message : "(no error message)");
g_clear_error(&error);
g_clear_object(&pixbuf);
return NULL;
}
return pixbuf;
}
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