/* 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 GdkPixbuf *
_gdk_pixbuf_new_from_uri_at_scale (const char *uri,
gint size,
GError **error)
{
gboolean result;
guchar buffer[LOAD_BUFFER_SIZE];
gssize bytes_read;
GdkPixbufLoader *loader = NULL;
GdkPixbuf *pixbuf;
GdkPixbufAnimation *animation;
GdkPixbufAnimationIter *iter;
gboolean has_frame;
SizePrepareContext info;
GFile *file;
GInputStream *input_stream;
g_return_val_if_fail (uri != NULL, NULL);
file = g_file_new_for_uri (uri);
input_stream = G_INPUT_STREAM (g_file_read (file, NULL, error));
if (input_stream == NULL) {
g_object_unref (file);
return NULL;
}
has_frame = FALSE;
result = FALSE;
while (!has_frame) {
bytes_read = g_input_stream_read (input_stream,
buffer,
sizeof (buffer),
NULL,
error);
if (bytes_read == -1) {
break;
}
result = TRUE;
if (bytes_read == 0) {
break;
}
if (loader == NULL) {
loader = create_loader (file, buffer, bytes_read);
if (1 <= size) {
info.size = size;
info.input_width = info.input_height = 0;
g_signal_connect (loader, "size-prepared", G_CALLBACK (size_prepared_cb), &info);
}
g_assert (loader != NULL);
}
if (!gdk_pixbuf_loader_write (loader,
(unsigned char *)buffer,
bytes_read,
error)) {
result = FALSE;
break;
}
animation = gdk_pixbuf_loader_get_animation (loader);
if (animation) {
iter = gdk_pixbuf_animation_get_iter (animation, NULL);
if (!gdk_pixbuf_animation_iter_on_currently_loading_frame (iter)) {
has_frame = TRUE;
}
g_object_unref (iter);
}
}
if (loader == NULL) {
/* This can happen if the above loop was exited due to the
* g_input_stream_read() call failing. */
result = FALSE;
} else if (*error != NULL) {
gdk_pixbuf_loader_close (loader, NULL);
result = FALSE;
} else if (gdk_pixbuf_loader_close (loader, error) == FALSE) {
if (!g_error_matches (*error, GDK_PIXBUF_ERROR, GDK_PIXBUF_ERROR_INCOMPLETE_ANIMATION))
result = FALSE;
else
g_clear_error (error);
}
if (!result) {
g_clear_object (&loader);
g_input_stream_close (input_stream, NULL, NULL);
g_object_unref (input_stream);
g_object_unref (file);
return NULL;
}
g_input_stream_close (input_stream, NULL, NULL);
g_object_unref (input_stream);
g_object_unref (file);
pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
if (pixbuf != NULL) {
g_object_ref (G_OBJECT (pixbuf));
g_object_set_data (G_OBJECT (pixbuf), "gnome-original-width",
GINT_TO_POINTER (info.input_width));
g_object_set_data (G_OBJECT (pixbuf), "gnome-original-height",
GINT_TO_POINTER (info.input_height));
}
g_object_unref (G_OBJECT (loader));
return pixbuf;
}
/**
* gnome_gdk_pixbuf_new_from_uri:
* @uri: the uri of an image
* @width: The width the image should have or -1 to not constrain the width
* @height: The height the image should have or -1 to not constrain the height
* @preserve_aspect_ratio: %TRUE to preserve the image's aspect ratio
*
* Loads a GdkPixbuf from the image file @uri points to, scaling it to the
* desired size. If you pass -1 for @width or @height then the value
* specified in the file will be used.
*
* When preserving aspect ratio, if both height and width are set the size
* is picked such that the scaled image fits in a width * height rectangle.
*
* Return value: The loaded pixbuf, or NULL on error
*
* Since: 2.14
**/
GdkPixbuf *
gnome_gdk_pixbuf_new_from_uri_at_scale (const char *uri,
gint width,
gint height,
gboolean preserve_aspect_ratio)
{
GnomeVFSResult result;
char buffer[LOAD_BUFFER_SIZE];
GnomeVFSFileSize bytes_read;
GdkPixbufLoader *loader;
GdkPixbuf *pixbuf;
GdkPixbufAnimation *animation;
GdkPixbufAnimationIter *iter;
gboolean has_frame;
SizePrepareContext info;
GFile *file;
GFileInputStream *file_input_stream;
g_return_val_if_fail (uri != NULL, NULL);
file = g_file_new_for_uri (uri);
file_input_stream = g_file_read (file, NULL, NULL);
if (file_input_stream == NULL) {
g_object_unref (file);
return NULL;
}
loader = gdk_pixbuf_loader_new ();
if (1 <= width || 1 <= height) {
info.width = width;
info.height = height;
info.input_width = info.input_height = 0;
info.preserve_aspect_ratio = preserve_aspect_ratio;
g_signal_connect (loader, "size-prepared", G_CALLBACK (size_prepared_cb), &info);
}
has_frame = FALSE;
result = GNOME_VFS_ERROR_GENERIC;
while (!has_frame) {
bytes_read = g_input_stream_read (G_INPUT_STREAM (file_input_stream),
buffer,
sizeof (buffer),
NULL,
NULL);
if (bytes_read == -1) {
break;
}
result = GNOME_VFS_OK;
if (bytes_read == 0) {
break;
}
if (!gdk_pixbuf_loader_write (loader,
(unsigned char *)buffer,
bytes_read,
NULL)) {
result = GNOME_VFS_ERROR_WRONG_FORMAT;
break;
}
animation = gdk_pixbuf_loader_get_animation (loader);
if (animation) {
iter = gdk_pixbuf_animation_get_iter (animation, NULL);
if (!gdk_pixbuf_animation_iter_on_currently_loading_frame (iter)) {
has_frame = TRUE;
}
g_object_unref (iter);
}
}
gdk_pixbuf_loader_close (loader, NULL);
if (result != GNOME_VFS_OK) {
g_object_unref (G_OBJECT (loader));
g_input_stream_close (G_INPUT_STREAM (file_input_stream), NULL, NULL);
g_object_unref (file_input_stream);
g_object_unref (file);
return NULL;
}
g_input_stream_close (G_INPUT_STREAM (file_input_stream), NULL, NULL);
g_object_unref (file_input_stream);
g_object_unref (file);
pixbuf = gdk_pixbuf_loader_get_pixbuf (loader);
if (pixbuf != NULL) {
g_object_ref (G_OBJECT (pixbuf));
g_object_set_data (G_OBJECT (pixbuf), "gnome-original-width",
GINT_TO_POINTER (info.input_width));
g_object_set_data (G_OBJECT (pixbuf), "gnome-original-height",
GINT_TO_POINTER (info.input_height));
}
g_object_unref (G_OBJECT (loader));
return pixbuf;
}
static VALUE
rg_on_currently_loading_frame_p(VALUE self)
{
return CBOOL2RVAL(gdk_pixbuf_animation_iter_on_currently_loading_frame(RVAL2ITR(self)));
}
