/* -*- Mode: C; c-basic-offset: 2; -*- */
/* GdkPixbuf library - test loaders
*
* Copyright (C) 2016 Red Hat, 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, see <http://www.gnu.org/licenses/>.
*
* Author: Andrey Tsyvarev
* Bastien Nocera
*/
#include <stdio.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
/* maximum number of frames in animation(before repeating) */
#define MAX_NUMBER_FRAMES 1000
/* Information about currently loading frame of animation.
*
* pixbuf == NULL means that animation is fully loaded
* (no currently loading frames exist).
*/
typedef struct {
GdkPixbufAnimationIter* iter; /* iterator pointed to the frame */
GTimeVal time; /* time when this frame appears */
GdkPixbuf *pixbuf; /* current content of the frame */
} FrameData;
/* Auxiliary function, returns numeric representation of pixel.
* For RGB format it is rrggbb(in hex), for RGBA - rrggbbaa. */
static guint32
get_pixel (GdkPixbuf *pixbuf, int x, int y)
{
guchar *colors;
guint32 pixel;
colors = ((guchar*)gdk_pixbuf_get_pixels(pixbuf)
+ gdk_pixbuf_get_n_channels(pixbuf) * x
+ gdk_pixbuf_get_rowstride(pixbuf) * y);
pixel = (colors[0] << 16) | (colors[1] << 8) | colors[2];
if (gdk_pixbuf_get_n_channels (pixbuf) == 4)
pixel = (pixel << 8) | colors[3];
return pixel;
}
/* Verify whether all pixels outside the updated area
* have the same values in pixbuf_old and pixbuf_new. */
static gboolean
pixbuf_not_changed_outside_area (GdkPixbuf *pixbuf_new,
GdkPixbuf *pixbuf_old,
int x,
int y,
int width,
int height)
{
int pixbuf_width, pixbuf_height;
int x_curr, y_curr;
pixbuf_width = gdk_pixbuf_get_width (pixbuf_new);
pixbuf_height = gdk_pixbuf_get_height (pixbuf_new);
for (x_curr = 0; x_curr < pixbuf_width; x_curr++) {
for (y_curr = 0; y_curr < pixbuf_height; y_curr++) {
if ((x_curr >= x)
&& (x_curr < x + width)
&& (y_curr >= y)
&& (y_curr < y + height)) {
continue; /* inside area - don't compare pixels. */
}
if (get_pixel (pixbuf_new, x_curr, y_curr) != get_pixel (pixbuf_old, x_curr, y_curr)) {
printf("Pixel at (%d, %d) changed from %x to %x,\n",
x_curr, y_curr,
get_pixel (pixbuf_old, x_curr, y_curr),
get_pixel (pixbuf_new, x_curr, y_curr));
printf("But it is outside of area with ");
printf("x=%d, y=%d, width=%d, height=%d\n",
x, y, width, height);
#if 0
gdk_pixbuf_save (pixbuf_old, "old.png", "png", NULL, NULL);
gdk_pixbuf_save (pixbuf_new, "new.png", "png", NULL, NULL);
#endif
g_assert_not_reached ();
}
}
}
return TRUE;
}
static void
callback_area_updated (GdkPixbufLoader *loader,
int x,
int y,
int width,
int height,
GdkPixbuf *pixbuf_old)
{
GdkPixbuf *pixbuf_new;
pixbuf_new = gdk_pixbuf_loader_get_pixbuf (loader);
pixbuf_not_changed_outside_area (pixbuf_new, pixbuf_old, x, y, width, height);
/* update copy of pixbuf */
gdk_pixbuf_copy_area (pixbuf_new, x, y, width, height, pixbuf_old, x, y);
}
/* free copy of pixbuf used in area-updated callback. */
static void
callback_closed (GdkPixbufLoader *loader,
GdkPixbuf *pixbuf_copy)
{
g_object_unref (pixbuf_copy);
}
/* prepare copy of pixbuf and connect other callbacks */
static void
callback_area_prepared (GdkPixbufLoader *loader)
{
GdkPixbuf *pixbuf_copy;
pixbuf_copy = gdk_pixbuf_copy (gdk_pixbuf_loader_get_pixbuf (loader));
/* connect callbacks for another signals for not use pointer to pointer in them. */
g_signal_connect (loader, "area-updated",
(GCallback) callback_area_updated, (gpointer) pixbuf_copy);
g_signal_connect (loader, "closed",
(GCallback) callback_closed, (gpointer) pixbuf_copy);
}
/* Read count_bytes from the channel and write them to the loader.
* Returns number of bytes written.
* count_bytes = G_MAXSIZE means read as many bytes as possible. */
static gsize
loader_write_from_channel (GdkPixbufLoader *loader,
GIOChannel *channel,
gsize count_bytes)
{
guchar* buffer;
gsize bytes_read;
GIOStatus read_status;
if(count_bytes < G_MAXSIZE) {
/* read no more than 'count_bytes' bytes */
buffer = g_malloc(count_bytes);
read_status = g_io_channel_read_chars (channel, (gchar*) buffer, count_bytes, &bytes_read, NULL);
} else {
/*read up to end */
read_status = g_io_channel_read_to_end (channel, (gchar**) &buffer, &bytes_read, NULL);
}
if ((read_status != G_IO_STATUS_NORMAL) && (read_status != G_IO_STATUS_EOF))
g_assert_not_reached ();
if (!gdk_pixbuf_loader_write(loader, buffer, bytes_read, NULL))
g_assert_not_reached ();
g_free (buffer);
return bytes_read;
}
static void
test_area_updated_ico (gconstpointer data)
{
const char *filename;
GIOChannel *channel;
GdkPixbufLoader *loader;
filename = g_test_get_filename (G_TEST_DIST, data, NULL);
/* create channel */
channel = g_io_channel_new_file(filename, "r", NULL);
g_assert_nonnull (channel);
g_io_channel_set_encoding (channel, NULL, NULL);
/* create loader */
loader = gdk_pixbuf_loader_new ();
g_assert_nonnull (loader);
g_signal_connect(loader, "area-prepared",
(GCallback) callback_area_prepared, NULL);
/* callbacks for "area-updated" and "closed" signals will be connected
* in callback_area_prepared() */
/* read image byte by byte */
while (loader_write_from_channel(loader, channel, 1) == 1);
/* or read full image at once */
#if 0
loader_write_from_channel(loader, channel, G_MAXSIZE);
#endif
/* free resources */
g_io_channel_unref (channel);
gdk_pixbuf_loader_close (loader, NULL);
g_object_unref (loader);
}
/* Auxiliary function - look for frame that's currently loading. */
static void
update_currently_loaded_frame (FrameData* frame)
{
int tmp_count;
if (gdk_pixbuf_animation_iter_on_currently_loading_frame(frame->iter))
return; /* frame is currently being loaded */
/* clear old content of pixbuf */
if (frame->pixbuf)
g_object_unref (frame->pixbuf);
frame->pixbuf = NULL;
tmp_count = 0;
do {
int delay_time;
if (++tmp_count > MAX_NUMBER_FRAMES) {
/* protection against frames repeating */
return;
}
delay_time = gdk_pixbuf_animation_iter_get_delay_time (frame->iter);
if (delay_time < 0) {
/* this is last frame in the animation */
return;
}
g_time_val_add (&frame->time, delay_time * 1000);
gdk_pixbuf_animation_iter_advance (frame->iter, &frame->time);
} while (!gdk_pixbuf_animation_iter_on_currently_loading_frame (frame->iter));
/* store current content of the frame */
frame->pixbuf = gdk_pixbuf_copy (gdk_pixbuf_animation_iter_get_pixbuf (frame->iter));
}
static void
callback_area_updated_anim (GdkPixbufLoader *loader,
int x,
int y,
int width,
int height,
FrameData *frame_old)
{
GdkPixbuf *pixbuf_new;
/* "area-updated" signal was emitted after animation had fully loaded. */
g_assert_nonnull (frame_old->pixbuf);
pixbuf_new = gdk_pixbuf_animation_iter_get_pixbuf (frame_old->iter);
pixbuf_not_changed_outside_area (pixbuf_new, frame_old->pixbuf, x, y, width, height);
gdk_pixbuf_copy_area (pixbuf_new, x, y, width, height, frame_old->pixbuf, x, y);
update_currently_loaded_frame (frame_old);
}
/* free resources used in callback_area_updated_anim */
static void
callback_closed_anim(GdkPixbufLoader *loader, FrameData *frame_copy)
{
g_object_unref (frame_copy->iter);
if(frame_copy->pixbuf != NULL)
g_object_unref (frame_copy->pixbuf);
g_free (frame_copy);
}
/* prepare frame information and register other callbacks */
static void
callback_area_prepared_anim (GdkPixbufLoader* loader)
{
GdkPixbufAnimation *anim;
FrameData* frame_copy = g_new (FrameData, 1);
g_signal_connect (loader, "area-updated",
(GCallback) callback_area_updated_anim, (gpointer) frame_copy);
g_signal_connect (loader, "closed",
(GCallback) callback_closed_anim, (gpointer) frame_copy);
frame_copy->time.tv_sec = frame_copy->time.tv_usec = 0; /* some time */
anim = gdk_pixbuf_loader_get_animation (loader);
frame_copy->iter = gdk_pixbuf_animation_get_iter (anim, &frame_copy->time);
frame_copy->pixbuf = gdk_pixbuf_copy (gdk_pixbuf_animation_iter_get_pixbuf (frame_copy->iter));
update_currently_loaded_frame (frame_copy);
}
static void
test_area_updated_anim (gconstpointer data)
{
const char *filename;
GIOChannel *channel;
GdkPixbufLoader *loader;
filename = g_test_get_filename (G_TEST_DIST, data, NULL);
channel = g_io_channel_new_file (filename, "r", NULL);
g_assert_nonnull (channel);
g_io_channel_set_encoding(channel, NULL, NULL);
/*create loader */
loader = gdk_pixbuf_loader_new ();
g_assert_nonnull (loader);
g_signal_connect (loader, "area-prepared",
(GCallback) callback_area_prepared_anim, NULL);
/* other callbacks will be registered inside callback_area_prepared_anim */
/*read animation by portions of bytes */
#if 0
while(loader_write_from_channel(loader, channel, 20) == 20);
#endif
/* or read it at once */
loader_write_from_channel (loader, channel, G_MAXSIZE);
/* free resources */
g_io_channel_unref (channel);
gdk_pixbuf_loader_close (loader, NULL);
g_object_unref (loader);
}
int main(int argc, char **argv)
{
g_test_init (&argc, &argv, NULL);
g_test_add_data_func ("/pixbuf/area-updated/ico", (gconstpointer) "test-images/reftests/squares.ico", test_area_updated_ico);
g_test_add_data_func ("/pixbuf/area-updated/gif", (gconstpointer) "aero.gif", test_area_updated_anim);
g_test_add_data_func ("/pixbuf/area-updated/gif2", (gconstpointer) "1_partyanimsm2.gif", test_area_updated_anim);
g_test_add_data_func ("/pixbuf/area-updated/gif3", (gconstpointer) "test-animation.gif", test_area_updated_anim);
return g_test_run ();
}