mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-12-26 13:41:07 +00:00
1f6a65d375
2005-03-03 Matthias Clasen <mclasen@redhat.com> Make the gif loader handle oom when loading animations. (#168857, Tommi Komulainen) * io-gif-animation.c (gdk_pixbuf_gif_anim_frame_composite): Handle oom by returning NULL. * io-gif.c (gif_get_lzw): Return an error if composite returns NULL.
602 lines
24 KiB
C
602 lines
24 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
|
||
/* GdkPixbuf library - animated gif support
|
||
*
|
||
* Copyright (C) 1999 The Free Software Foundation
|
||
*
|
||
* Authors: Jonathan Blandford <jrb@redhat.com>
|
||
* Havoc Pennington <hp@redhat.com>
|
||
*
|
||
* 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 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., 59 Temple Place - Suite 330,
|
||
* Boston, MA 02111-1307, USA.
|
||
*/
|
||
|
||
#include <config.h>
|
||
#include <errno.h>
|
||
#include "gdk-pixbuf-private.h"
|
||
#include "io-gif-animation.h"
|
||
|
||
static void gdk_pixbuf_gif_anim_class_init (GdkPixbufGifAnimClass *klass);
|
||
static void gdk_pixbuf_gif_anim_finalize (GObject *object);
|
||
|
||
static gboolean gdk_pixbuf_gif_anim_is_static_image (GdkPixbufAnimation *animation);
|
||
static GdkPixbuf* gdk_pixbuf_gif_anim_get_static_image (GdkPixbufAnimation *animation);
|
||
|
||
static void gdk_pixbuf_gif_anim_get_size (GdkPixbufAnimation *anim,
|
||
int *width,
|
||
int *height);
|
||
static GdkPixbufAnimationIter* gdk_pixbuf_gif_anim_get_iter (GdkPixbufAnimation *anim,
|
||
const GTimeVal *start_time);
|
||
|
||
|
||
|
||
|
||
static gpointer parent_class;
|
||
|
||
GType
|
||
gdk_pixbuf_gif_anim_get_type (void)
|
||
{
|
||
static GType object_type = 0;
|
||
|
||
if (!object_type) {
|
||
static const GTypeInfo object_info = {
|
||
sizeof (GdkPixbufGifAnimClass),
|
||
(GBaseInitFunc) NULL,
|
||
(GBaseFinalizeFunc) NULL,
|
||
(GClassInitFunc) gdk_pixbuf_gif_anim_class_init,
|
||
NULL, /* class_finalize */
|
||
NULL, /* class_data */
|
||
sizeof (GdkPixbufGifAnim),
|
||
0, /* n_preallocs */
|
||
(GInstanceInitFunc) NULL,
|
||
};
|
||
|
||
object_type = g_type_register_static (GDK_TYPE_PIXBUF_ANIMATION,
|
||
"GdkPixbufGifAnim",
|
||
&object_info, 0);
|
||
}
|
||
|
||
return object_type;
|
||
}
|
||
|
||
static void
|
||
gdk_pixbuf_gif_anim_class_init (GdkPixbufGifAnimClass *klass)
|
||
{
|
||
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
||
GdkPixbufAnimationClass *anim_class = GDK_PIXBUF_ANIMATION_CLASS (klass);
|
||
|
||
parent_class = g_type_class_peek_parent (klass);
|
||
|
||
object_class->finalize = gdk_pixbuf_gif_anim_finalize;
|
||
|
||
anim_class->is_static_image = gdk_pixbuf_gif_anim_is_static_image;
|
||
anim_class->get_static_image = gdk_pixbuf_gif_anim_get_static_image;
|
||
anim_class->get_size = gdk_pixbuf_gif_anim_get_size;
|
||
anim_class->get_iter = gdk_pixbuf_gif_anim_get_iter;
|
||
}
|
||
|
||
static void
|
||
gdk_pixbuf_gif_anim_finalize (GObject *object)
|
||
{
|
||
GdkPixbufGifAnim *gif_anim = GDK_PIXBUF_GIF_ANIM (object);
|
||
|
||
GList *l;
|
||
GdkPixbufFrame *frame;
|
||
|
||
for (l = gif_anim->frames; l; l = l->next) {
|
||
frame = l->data;
|
||
g_object_unref (frame->pixbuf);
|
||
if (frame->composited)
|
||
g_object_unref (frame->composited);
|
||
if (frame->revert)
|
||
g_object_unref (frame->revert);
|
||
g_free (frame);
|
||
}
|
||
|
||
g_list_free (gif_anim->frames);
|
||
|
||
G_OBJECT_CLASS (parent_class)->finalize (object);
|
||
}
|
||
|
||
static gboolean
|
||
gdk_pixbuf_gif_anim_is_static_image (GdkPixbufAnimation *animation)
|
||
{
|
||
GdkPixbufGifAnim *gif_anim;
|
||
|
||
gif_anim = GDK_PIXBUF_GIF_ANIM (animation);
|
||
|
||
return (gif_anim->frames != NULL &&
|
||
gif_anim->frames->next == NULL);
|
||
}
|
||
|
||
static GdkPixbuf*
|
||
gdk_pixbuf_gif_anim_get_static_image (GdkPixbufAnimation *animation)
|
||
{
|
||
GdkPixbufGifAnim *gif_anim;
|
||
|
||
gif_anim = GDK_PIXBUF_GIF_ANIM (animation);
|
||
|
||
if (gif_anim->frames == NULL)
|
||
return NULL;
|
||
else
|
||
return GDK_PIXBUF (((GdkPixbufFrame*)gif_anim->frames->data)->pixbuf);
|
||
}
|
||
|
||
static void
|
||
gdk_pixbuf_gif_anim_get_size (GdkPixbufAnimation *anim,
|
||
int *width,
|
||
int *height)
|
||
{
|
||
GdkPixbufGifAnim *gif_anim;
|
||
|
||
gif_anim = GDK_PIXBUF_GIF_ANIM (anim);
|
||
|
||
if (width)
|
||
*width = gif_anim->width;
|
||
|
||
if (height)
|
||
*height = gif_anim->height;
|
||
}
|
||
|
||
|
||
static void
|
||
iter_clear (GdkPixbufGifAnimIter *iter)
|
||
{
|
||
iter->current_frame = NULL;
|
||
}
|
||
|
||
static void
|
||
iter_restart (GdkPixbufGifAnimIter *iter)
|
||
{
|
||
iter_clear (iter);
|
||
|
||
iter->current_frame = iter->gif_anim->frames;
|
||
}
|
||
|
||
static GdkPixbufAnimationIter*
|
||
gdk_pixbuf_gif_anim_get_iter (GdkPixbufAnimation *anim,
|
||
const GTimeVal *start_time)
|
||
{
|
||
GdkPixbufGifAnimIter *iter;
|
||
|
||
iter = g_object_new (GDK_TYPE_PIXBUF_GIF_ANIM_ITER, NULL);
|
||
|
||
iter->gif_anim = GDK_PIXBUF_GIF_ANIM (anim);
|
||
|
||
g_object_ref (iter->gif_anim);
|
||
|
||
iter_restart (iter);
|
||
|
||
iter->start_time = *start_time;
|
||
iter->current_time = *start_time;
|
||
iter->first_loop_slowness = 0;
|
||
|
||
return GDK_PIXBUF_ANIMATION_ITER (iter);
|
||
}
|
||
|
||
|
||
|
||
static void gdk_pixbuf_gif_anim_iter_class_init (GdkPixbufGifAnimIterClass *klass);
|
||
static void gdk_pixbuf_gif_anim_iter_finalize (GObject *object);
|
||
|
||
static int gdk_pixbuf_gif_anim_iter_get_delay_time (GdkPixbufAnimationIter *iter);
|
||
static GdkPixbuf* gdk_pixbuf_gif_anim_iter_get_pixbuf (GdkPixbufAnimationIter *iter);
|
||
static gboolean gdk_pixbuf_gif_anim_iter_on_currently_loading_frame (GdkPixbufAnimationIter *iter);
|
||
static gboolean gdk_pixbuf_gif_anim_iter_advance (GdkPixbufAnimationIter *iter,
|
||
const GTimeVal *current_time);
|
||
|
||
|
||
|
||
static gpointer iter_parent_class;
|
||
|
||
GType
|
||
gdk_pixbuf_gif_anim_iter_get_type (void)
|
||
{
|
||
static GType object_type = 0;
|
||
|
||
if (!object_type) {
|
||
static const GTypeInfo object_info = {
|
||
sizeof (GdkPixbufGifAnimIterClass),
|
||
(GBaseInitFunc) NULL,
|
||
(GBaseFinalizeFunc) NULL,
|
||
(GClassInitFunc) gdk_pixbuf_gif_anim_iter_class_init,
|
||
NULL, /* class_finalize */
|
||
NULL, /* class_data */
|
||
sizeof (GdkPixbufGifAnimIter),
|
||
0, /* n_preallocs */
|
||
(GInstanceInitFunc) NULL,
|
||
};
|
||
|
||
object_type = g_type_register_static (GDK_TYPE_PIXBUF_ANIMATION_ITER,
|
||
"GdkPixbufGifAnimIter",
|
||
&object_info, 0);
|
||
}
|
||
|
||
return object_type;
|
||
}
|
||
|
||
static void
|
||
gdk_pixbuf_gif_anim_iter_class_init (GdkPixbufGifAnimIterClass *klass)
|
||
{
|
||
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
||
GdkPixbufAnimationIterClass *anim_iter_class =
|
||
GDK_PIXBUF_ANIMATION_ITER_CLASS (klass);
|
||
|
||
iter_parent_class = g_type_class_peek_parent (klass);
|
||
|
||
object_class->finalize = gdk_pixbuf_gif_anim_iter_finalize;
|
||
|
||
anim_iter_class->get_delay_time = gdk_pixbuf_gif_anim_iter_get_delay_time;
|
||
anim_iter_class->get_pixbuf = gdk_pixbuf_gif_anim_iter_get_pixbuf;
|
||
anim_iter_class->on_currently_loading_frame = gdk_pixbuf_gif_anim_iter_on_currently_loading_frame;
|
||
anim_iter_class->advance = gdk_pixbuf_gif_anim_iter_advance;
|
||
}
|
||
|
||
static void
|
||
gdk_pixbuf_gif_anim_iter_finalize (GObject *object)
|
||
{
|
||
GdkPixbufGifAnimIter *iter = GDK_PIXBUF_GIF_ANIM_ITER (object);
|
||
|
||
iter_clear (iter);
|
||
|
||
g_object_unref (iter->gif_anim);
|
||
|
||
G_OBJECT_CLASS (iter_parent_class)->finalize (object);
|
||
}
|
||
|
||
static gboolean
|
||
gdk_pixbuf_gif_anim_iter_advance (GdkPixbufAnimationIter *anim_iter,
|
||
const GTimeVal *current_time)
|
||
{
|
||
GdkPixbufGifAnimIter *iter;
|
||
gint elapsed;
|
||
gint loop;
|
||
GList *tmp;
|
||
GList *old;
|
||
|
||
iter = GDK_PIXBUF_GIF_ANIM_ITER (anim_iter);
|
||
|
||
iter->current_time = *current_time;
|
||
|
||
/* We use milliseconds for all times */
|
||
elapsed =
|
||
(((iter->current_time.tv_sec - iter->start_time.tv_sec) * G_USEC_PER_SEC +
|
||
iter->current_time.tv_usec - iter->start_time.tv_usec)) / 1000;
|
||
|
||
if (elapsed < 0) {
|
||
/* Try to compensate; probably the system clock
|
||
* was set backwards
|
||
*/
|
||
iter->start_time = iter->current_time;
|
||
elapsed = 0;
|
||
}
|
||
|
||
g_assert (iter->gif_anim->total_time > 0);
|
||
|
||
/* See how many times we've already played the full animation,
|
||
* and subtract time for that.
|
||
*/
|
||
|
||
if (iter->gif_anim->loading)
|
||
loop = 0;
|
||
else {
|
||
/* If current_frame is NULL at this point, we have loaded the
|
||
* animation from a source which fell behind the speed of the
|
||
* display. We remember how much slower the first loop was due
|
||
* to this and correct the position calculation in order to not
|
||
* jump in the middle of the second loop.
|
||
*/
|
||
if (iter->current_frame == NULL)
|
||
iter->first_loop_slowness = MAX(0, elapsed - iter->gif_anim->total_time);
|
||
|
||
loop = (elapsed - iter->first_loop_slowness) / iter->gif_anim->total_time;
|
||
elapsed = (elapsed - iter->first_loop_slowness) % iter->gif_anim->total_time;
|
||
}
|
||
|
||
iter->position = elapsed;
|
||
|
||
/* Now move to the proper frame */
|
||
if (iter->gif_anim->loop == 0 || loop < iter->gif_anim->loop)
|
||
tmp = iter->gif_anim->frames;
|
||
else
|
||
tmp = NULL;
|
||
while (tmp != NULL) {
|
||
GdkPixbufFrame *frame = tmp->data;
|
||
|
||
if (iter->position >= frame->elapsed &&
|
||
iter->position < (frame->elapsed + frame->delay_time))
|
||
break;
|
||
|
||
tmp = tmp->next;
|
||
}
|
||
|
||
old = iter->current_frame;
|
||
|
||
iter->current_frame = tmp;
|
||
|
||
return iter->current_frame != old;
|
||
}
|
||
|
||
int
|
||
gdk_pixbuf_gif_anim_iter_get_delay_time (GdkPixbufAnimationIter *anim_iter)
|
||
{
|
||
GdkPixbufFrame *frame;
|
||
GdkPixbufGifAnimIter *iter;
|
||
|
||
iter = GDK_PIXBUF_GIF_ANIM_ITER (anim_iter);
|
||
|
||
if (iter->current_frame) {
|
||
frame = iter->current_frame->data;
|
||
|
||
#if 0
|
||
g_print ("frame start: %d pos: %d frame len: %d frame remaining: %d\n",
|
||
frame->elapsed,
|
||
iter->position,
|
||
frame->delay_time,
|
||
frame->delay_time - (iter->position - frame->elapsed));
|
||
#endif
|
||
|
||
return frame->delay_time - (iter->position - frame->elapsed);
|
||
} else
|
||
return -1; /* show last frame forever */
|
||
}
|
||
|
||
void
|
||
gdk_pixbuf_gif_anim_frame_composite (GdkPixbufGifAnim *gif_anim,
|
||
GdkPixbufFrame *frame)
|
||
{
|
||
GList *link;
|
||
GList *tmp;
|
||
|
||
link = g_list_find (gif_anim->frames, frame);
|
||
|
||
if (frame->need_recomposite || frame->composited == NULL) {
|
||
/* For now, to composite we start with the last
|
||
* composited frame and composite everything up to
|
||
* here.
|
||
*/
|
||
|
||
/* Rewind to last composited frame. */
|
||
tmp = link;
|
||
while (tmp != NULL) {
|
||
GdkPixbufFrame *f = tmp->data;
|
||
|
||
if (f->need_recomposite) {
|
||
if (f->composited) {
|
||
g_object_unref (f->composited);
|
||
f->composited = NULL;
|
||
}
|
||
}
|
||
|
||
if (f->composited != NULL)
|
||
break;
|
||
|
||
tmp = tmp->prev;
|
||
}
|
||
|
||
/* Go forward, compositing all frames up to the current frame */
|
||
if (tmp == NULL)
|
||
tmp = gif_anim->frames;
|
||
|
||
while (tmp != NULL) {
|
||
GdkPixbufFrame *f = tmp->data;
|
||
|
||
if (f->pixbuf == NULL)
|
||
return;
|
||
|
||
gint clipped_width = MIN (gif_anim->width - f->x_offset, gdk_pixbuf_get_width (f->pixbuf));
|
||
gint clipped_height = MIN (gif_anim->height - f->y_offset, gdk_pixbuf_get_height (f->pixbuf));
|
||
|
||
if (f->need_recomposite) {
|
||
if (f->composited) {
|
||
g_object_unref (f->composited);
|
||
f->composited = NULL;
|
||
}
|
||
}
|
||
|
||
if (f->composited != NULL)
|
||
goto next;
|
||
|
||
if (tmp->prev == NULL) {
|
||
/* First frame may be smaller than the whole image;
|
||
* if so, we make the area outside it full alpha if the
|
||
* image has alpha, and background color otherwise.
|
||
* GIF spec doesn't actually say what to do about this.
|
||
*/
|
||
f->composited = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
|
||
TRUE,
|
||
8, gif_anim->width, gif_anim->height);
|
||
|
||
if (f->composited == NULL)
|
||
return;
|
||
|
||
/* alpha gets dumped if f->composited has no alpha */
|
||
|
||
gdk_pixbuf_fill (f->composited,
|
||
(gif_anim->bg_red << 24) |
|
||
(gif_anim->bg_green << 16) |
|
||
(gif_anim->bg_blue << 8));
|
||
|
||
if (clipped_width > 0 && clipped_height > 0)
|
||
gdk_pixbuf_composite (f->pixbuf,
|
||
f->composited,
|
||
f->x_offset,
|
||
f->y_offset,
|
||
clipped_width,
|
||
clipped_height,
|
||
f->x_offset, f->y_offset,
|
||
1.0, 1.0,
|
||
GDK_INTERP_BILINEAR,
|
||
255);
|
||
|
||
if (f->action == GDK_PIXBUF_FRAME_REVERT)
|
||
g_warning ("First frame of GIF has bad dispose mode, GIF loader should not have loaded this image");
|
||
|
||
f->need_recomposite = FALSE;
|
||
} else {
|
||
GdkPixbufFrame *prev_frame;
|
||
gint prev_clipped_width;
|
||
gint prev_clipped_height;
|
||
|
||
prev_frame = tmp->prev->data;
|
||
|
||
prev_clipped_width = MIN (gif_anim->width - prev_frame->x_offset, gdk_pixbuf_get_width (prev_frame->pixbuf));
|
||
prev_clipped_height = MIN (gif_anim->height - prev_frame->y_offset, gdk_pixbuf_get_height (prev_frame->pixbuf));
|
||
|
||
/* Init f->composited with what we should have after the previous
|
||
* frame
|
||
*/
|
||
|
||
if (prev_frame->action == GDK_PIXBUF_FRAME_RETAIN) {
|
||
f->composited = gdk_pixbuf_copy (prev_frame->composited);
|
||
|
||
if (f->composited == NULL)
|
||
return;
|
||
|
||
} else if (prev_frame->action == GDK_PIXBUF_FRAME_DISPOSE) {
|
||
f->composited = gdk_pixbuf_copy (prev_frame->composited);
|
||
|
||
if (f->composited == NULL)
|
||
return;
|
||
|
||
if (prev_clipped_width > 0 && prev_clipped_height > 0) {
|
||
/* Clear area of previous frame to background */
|
||
GdkPixbuf *area;
|
||
|
||
area = gdk_pixbuf_new_subpixbuf (f->composited,
|
||
prev_frame->x_offset,
|
||
prev_frame->y_offset,
|
||
prev_clipped_width,
|
||
prev_clipped_height);
|
||
|
||
if (area == NULL)
|
||
return;
|
||
|
||
gdk_pixbuf_fill (area,
|
||
(gif_anim->bg_red << 24) |
|
||
(gif_anim->bg_green << 16) |
|
||
(gif_anim->bg_blue << 8));
|
||
|
||
g_object_unref (area);
|
||
}
|
||
} else if (prev_frame->action == GDK_PIXBUF_FRAME_REVERT) {
|
||
f->composited = gdk_pixbuf_copy (prev_frame->composited);
|
||
|
||
if (f->composited == NULL)
|
||
return;
|
||
|
||
if (prev_frame->revert != NULL &&
|
||
prev_clipped_width > 0 && prev_clipped_height > 0) {
|
||
/* Copy in the revert frame */
|
||
gdk_pixbuf_copy_area (prev_frame->revert,
|
||
0, 0,
|
||
gdk_pixbuf_get_width (prev_frame->revert),
|
||
gdk_pixbuf_get_height (prev_frame->revert),
|
||
f->composited,
|
||
prev_frame->x_offset,
|
||
prev_frame->y_offset);
|
||
}
|
||
} else {
|
||
g_warning ("Unknown revert action for GIF frame");
|
||
}
|
||
|
||
if (f->revert == NULL &&
|
||
f->action == GDK_PIXBUF_FRAME_REVERT) {
|
||
if (clipped_width > 0 && clipped_height > 0) {
|
||
/* We need to save the contents before compositing */
|
||
GdkPixbuf *area;
|
||
|
||
area = gdk_pixbuf_new_subpixbuf (f->composited,
|
||
f->x_offset,
|
||
f->y_offset,
|
||
clipped_width,
|
||
clipped_height);
|
||
|
||
if (area == NULL)
|
||
return;
|
||
|
||
f->revert = gdk_pixbuf_copy (area);
|
||
|
||
g_object_unref (area);
|
||
|
||
if (f->revert == NULL)
|
||
return;
|
||
}
|
||
}
|
||
|
||
if (clipped_width > 0 && clipped_height > 0 &&
|
||
f->pixbuf != NULL && f->composited != NULL) {
|
||
/* Put current frame onto f->composited */
|
||
gdk_pixbuf_composite (f->pixbuf,
|
||
f->composited,
|
||
f->x_offset,
|
||
f->y_offset,
|
||
clipped_width,
|
||
clipped_height,
|
||
f->x_offset, f->y_offset,
|
||
1.0, 1.0,
|
||
GDK_INTERP_NEAREST,
|
||
255);
|
||
}
|
||
|
||
f->need_recomposite = FALSE;
|
||
}
|
||
|
||
next:
|
||
if (tmp == link)
|
||
break;
|
||
|
||
tmp = tmp->next;
|
||
}
|
||
}
|
||
}
|
||
|
||
GdkPixbuf*
|
||
gdk_pixbuf_gif_anim_iter_get_pixbuf (GdkPixbufAnimationIter *anim_iter)
|
||
{
|
||
GdkPixbufGifAnimIter *iter;
|
||
GdkPixbufFrame *frame;
|
||
|
||
iter = GDK_PIXBUF_GIF_ANIM_ITER (anim_iter);
|
||
|
||
frame = iter->current_frame ? iter->current_frame->data : g_list_last (iter->gif_anim->frames)->data;
|
||
|
||
#if 0
|
||
if (FALSE && frame)
|
||
g_print ("current frame %d dispose mode %d %d x %d\n",
|
||
g_list_index (iter->gif_anim->frames,
|
||
frame),
|
||
frame->action,
|
||
gdk_pixbuf_get_width (frame->pixbuf),
|
||
gdk_pixbuf_get_height (frame->pixbuf));
|
||
#endif
|
||
|
||
if (frame == NULL)
|
||
return NULL;
|
||
|
||
gdk_pixbuf_gif_anim_frame_composite (iter->gif_anim, frame);
|
||
|
||
return frame->composited;
|
||
}
|
||
|
||
static gboolean
|
||
gdk_pixbuf_gif_anim_iter_on_currently_loading_frame (GdkPixbufAnimationIter *anim_iter)
|
||
{
|
||
GdkPixbufGifAnimIter *iter;
|
||
|
||
iter = GDK_PIXBUF_GIF_ANIM_ITER (anim_iter);
|
||
|
||
return iter->current_frame == NULL || iter->current_frame->next == NULL;
|
||
}
|