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gtk2/gdk-pixbuf/io-gif-animation.c
Havoc Pennington b4e4a0ed9d fix some shell typos 
2001-05-04  Havoc Pennington  <hp@redhat.com>

	* configure.in: fix some shell typos

	* gtk/gtkcolorsel.c (gtk_color_selection_destroy): warning fix

	* gtk/gtkimage.c: handle animations

	* gtk/gtkcheckbutton.c (gtk_check_button_size_request): request
	border_width * 2, not just border_width

	* gtk/gtkscale.c: add "format_value" signal to allow people
	to override the way values are drawn.
	(gtk_scale_get_value_size): fix width/height mistake,
	and compute size from actual displayed text, not
	from made-up text.

	* gtk/gtktexttag.c (gtk_text_tag_class_init): fix return type in
	signal registration

	* tests/testtext.c: Add "Remove all tags" menu item for testing

	* gtk/gtktextbuffer.c (gtk_text_buffer_remove_all_tags): implement

	* demos/gtk-demo/main.c (main): add hack so we can find modules
	without installing gtk

	* demos/gtk-demo/textview.c (insert_text): demo font scaling

	* gtk/gtkcellrenderertext.c: Add "scale" property (font scaling
	factor)
	(gtk_cell_renderer_text_set_property): remove some bogus
	g_object_notify

	* gtk/gtktexttag.c: add "scale" property which is a font scaling
	factor

	* gtk/gtktextlayout.c (add_text_attrs): add font scale attribute
	to layout

	* gtk/gtktextiter.c (gtk_text_iter_is_start): rename from
	gtk_text_iter_is_first

2001-05-04  Havoc Pennington  <hp@redhat.com>

	* pixops/pixops.c (pixops_process): merge fix from stable: Patch
	 from hoshem@mel.comcen.com.au to fix nonzero X offsets.  Fixes
	 bug #50371.

        * gdk-pixbuf/pixops/pixops.c (pixops_composite_nearest): merge
	from stable: Patch from OKADA Mitsuru <m-okada@fjb.co.jp> to fix
	confusion of using "src" instead of "p".
        (pixops_composite_color_nearest): Use a more accurate (and
	correct, to begin with) compositing method.  This cures checks
	showing through on images with no alpha.

	* gdk-pixbuf.c (gdk_pixbuf_fill): fix bug that left some trailing
	bytes unfilled.

	* gdk-pixbuf-io.h: fix UpdatedNotifyFunc to use signed ints

	* gdk-pixbuf-loader.h (struct _GdkPixbufLoaderClass): Change
	area_updated signal to use signed ints.  Removed animation-related
	signals.

	* io-gif.c, io-gif-animation.h, io-gif-animation.c: Massive
	rewrite action

	* gdk-pixbuf-animation.c: Add GdkPixbufAnimationIter to abstract
	all the pesky details. Remove old frame-based API. Make
	GdkPixbufAnimation an abstract base class, derived by the loaders.
2001-05-07 15:58:47 +00:00

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/* -*- 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-io.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;
gdk_pixbuf_unref (frame->pixbuf);
if (frame->composited)
gdk_pixbuf_unref (frame->composited);
if (frame->revert)
gdk_pixbuf_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 (G_OBJECT (iter->gif_anim));
iter_restart (iter);
iter->start_time = *start_time;
iter->current_time = *start_time;
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 (G_OBJECT (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;
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;
}
/* See how many times we've already played the full animation,
* and subtract time for that.
*/
elapsed = elapsed % iter->gif_anim->total_time;
g_assert (elapsed < iter->gif_anim->total_time);
iter->position = elapsed;
/* Now move to the proper frame */
tmp = iter->gif_anim->frames;
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 (G_OBJECT (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->need_recomposite) {
if (f->composited) {
g_object_unref (G_OBJECT (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);
/* 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) |
(f->bg_transparent ? 0 : 255));
gdk_pixbuf_composite (f->pixbuf,
f->composited,
f->x_offset,
f->y_offset,
gdk_pixbuf_get_width (f->pixbuf),
gdk_pixbuf_get_height (f->pixbuf),
f->x_offset, f->y_offset,
1.0, 1.0,
GDK_INTERP_BILINEAR,
255);
#if 0
gdk_pixbuf_copy_area (f->pixbuf,
0, 0,
gdk_pixbuf_get_width (f->pixbuf),
gdk_pixbuf_get_height (f->pixbuf),
f->composited,
f->x_offset,
f->y_offset);
#endif
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;
prev_frame = tmp->prev->data;
/* 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);
} else if (prev_frame->action == GDK_PIXBUF_FRAME_DISPOSE) {
GdkPixbuf *area;
f->composited = gdk_pixbuf_copy (prev_frame->composited);
/* Clear area of previous frame to background */
area = gdk_pixbuf_new_subpixbuf (f->composited,
prev_frame->x_offset,
prev_frame->y_offset,
gdk_pixbuf_get_width (prev_frame->pixbuf),
gdk_pixbuf_get_height (prev_frame->pixbuf));
gdk_pixbuf_fill (area,
(gif_anim->bg_red << 24) |
(gif_anim->bg_green << 16) |
(gif_anim->bg_blue << 8) |
prev_frame->bg_transparent ? 0 : 255);
g_object_unref (G_OBJECT (area));
} else if (prev_frame->action == GDK_PIXBUF_FRAME_REVERT) {
f->composited = gdk_pixbuf_copy (prev_frame->composited);
/* 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) {
/* We need to save the contents before compositing */
GdkPixbuf *area;
area = gdk_pixbuf_new_subpixbuf (f->composited,
f->x_offset,
f->y_offset,
gdk_pixbuf_get_width (f->pixbuf),
gdk_pixbuf_get_height (f->pixbuf));
f->revert = gdk_pixbuf_copy (area);
g_object_unref (G_OBJECT (area));
}
/* Put current frame onto f->composited */
gdk_pixbuf_composite (f->pixbuf,
f->composited,
f->x_offset,
f->y_offset,
gdk_pixbuf_get_width (f->pixbuf),
gdk_pixbuf_get_height (f->pixbuf),
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;
}
}
g_assert (frame->composited != NULL);
g_assert (gdk_pixbuf_get_width (frame->composited) == gif_anim->width);
g_assert (gdk_pixbuf_get_height (frame->composited) == gif_anim->height);
}
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 : NULL;
#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;
}
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