gtk/gdk-pixbuf/io-ani-animation.c

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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
/* GdkPixbuf library - ani support
*
* Copyright (C) 2002 The Free Software Foundation
*
* Author: Matthias Clasen <maclas@gmx.de>
*
* 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-ani-animation.h"
static void gdk_pixbuf_ani_anim_class_init (GdkPixbufAniAnimClass *klass);
static void gdk_pixbuf_ani_anim_finalize (GObject *object);
static gboolean gdk_pixbuf_ani_anim_is_static_image (GdkPixbufAnimation *animation);
static GdkPixbuf* gdk_pixbuf_ani_anim_get_static_image (GdkPixbufAnimation *animation);
static void gdk_pixbuf_ani_anim_get_size (GdkPixbufAnimation *anim,
int *width,
int *height);
static GdkPixbufAnimationIter* gdk_pixbuf_ani_anim_get_iter (GdkPixbufAnimation *anim,
const GTimeVal *start_time);
static gpointer parent_class;
GType
gdk_pixbuf_ani_anim_get_type (void)
{
static GType object_type = 0;
if (!object_type) {
const GTypeInfo object_info = {
sizeof (GdkPixbufAniAnimClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gdk_pixbuf_ani_anim_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GdkPixbufAniAnim),
0, /* n_preallocs */
(GInstanceInitFunc) NULL,
};
object_type = g_type_register_static (GDK_TYPE_PIXBUF_ANIMATION,
g_intern_static_string ("GdkPixbufAniAnim"),
&object_info, 0);
}
return object_type;
}
static void
gdk_pixbuf_ani_anim_class_init (GdkPixbufAniAnimClass *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_ani_anim_finalize;
anim_class->is_static_image = gdk_pixbuf_ani_anim_is_static_image;
anim_class->get_static_image = gdk_pixbuf_ani_anim_get_static_image;
anim_class->get_size = gdk_pixbuf_ani_anim_get_size;
anim_class->get_iter = gdk_pixbuf_ani_anim_get_iter;
}
static void
gdk_pixbuf_ani_anim_finalize (GObject *object)
{
GdkPixbufAniAnim *ani_anim = GDK_PIXBUF_ANI_ANIM (object);
gint i;
for (i = 0; i < ani_anim->n_pixbufs; i++) {
if (ani_anim->pixbufs[i])
g_object_unref (ani_anim->pixbufs[i]);
}
g_free (ani_anim->pixbufs);
g_free (ani_anim->sequence);
g_free (ani_anim->delay);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gdk_pixbuf_ani_anim_is_static_image (GdkPixbufAnimation *animation)
{
GdkPixbufAniAnim *ani_anim;
ani_anim = GDK_PIXBUF_ANI_ANIM (animation);
return ani_anim->n_frames == 1;
}
static GdkPixbuf*
gdk_pixbuf_ani_anim_get_static_image (GdkPixbufAnimation *animation)
{
GdkPixbufAniAnim *ani_anim;
ani_anim = GDK_PIXBUF_ANI_ANIM (animation);
if (ani_anim->pixbufs == NULL)
return NULL;
else
return ani_anim->pixbufs[0];
}
static void
gdk_pixbuf_ani_anim_get_size (GdkPixbufAnimation *anim,
int *width,
int *height)
{
GdkPixbufAniAnim *ani_anim;
ani_anim = GDK_PIXBUF_ANI_ANIM (anim);
if (width)
*width = ani_anim->width;
if (height)
*height = ani_anim->height;
}
static void
iter_restart (GdkPixbufAniAnimIter *iter)
{
iter->current_frame = 0;
iter->position = 0;
iter->elapsed = 0;
}
static GdkPixbufAnimationIter*
gdk_pixbuf_ani_anim_get_iter (GdkPixbufAnimation *anim,
const GTimeVal *start_time)
{
GdkPixbufAniAnimIter *iter;
iter = g_object_new (GDK_TYPE_PIXBUF_ANI_ANIM_ITER, NULL);
iter->ani_anim = GDK_PIXBUF_ANI_ANIM (anim);
g_object_ref (iter->ani_anim);
iter_restart (iter);
iter->start_time = *start_time;
iter->current_time = *start_time;
return GDK_PIXBUF_ANIMATION_ITER (iter);
}
static void gdk_pixbuf_ani_anim_iter_class_init (GdkPixbufAniAnimIterClass *klass);
static void gdk_pixbuf_ani_anim_iter_finalize (GObject *object);
static int gdk_pixbuf_ani_anim_iter_get_delay_time (GdkPixbufAnimationIter *iter);
static GdkPixbuf* gdk_pixbuf_ani_anim_iter_get_pixbuf (GdkPixbufAnimationIter *iter);
static gboolean gdk_pixbuf_ani_anim_iter_on_currently_loading_frame (GdkPixbufAnimationIter *iter);
static gboolean gdk_pixbuf_ani_anim_iter_advance (GdkPixbufAnimationIter *iter,
const GTimeVal *current_time);
static gpointer iter_parent_class;
GType
gdk_pixbuf_ani_anim_iter_get_type (void)
{
static GType object_type = 0;
if (!object_type) {
const GTypeInfo object_info = {
sizeof (GdkPixbufAniAnimIterClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gdk_pixbuf_ani_anim_iter_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GdkPixbufAniAnimIter),
0, /* n_preallocs */
(GInstanceInitFunc) NULL,
};
object_type = g_type_register_static (GDK_TYPE_PIXBUF_ANIMATION_ITER,
g_intern_static_string ("GdkPixbufAniAnimIter"),
&object_info, 0);
}
return object_type;
}
static void
gdk_pixbuf_ani_anim_iter_class_init (GdkPixbufAniAnimIterClass *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_ani_anim_iter_finalize;
anim_iter_class->get_delay_time = gdk_pixbuf_ani_anim_iter_get_delay_time;
anim_iter_class->get_pixbuf = gdk_pixbuf_ani_anim_iter_get_pixbuf;
anim_iter_class->on_currently_loading_frame = gdk_pixbuf_ani_anim_iter_on_currently_loading_frame;
anim_iter_class->advance = gdk_pixbuf_ani_anim_iter_advance;
}
static void
gdk_pixbuf_ani_anim_iter_finalize (GObject *object)
{
GdkPixbufAniAnimIter *iter = GDK_PIXBUF_ANI_ANIM_ITER (object);
g_object_unref (iter->ani_anim);
G_OBJECT_CLASS (iter_parent_class)->finalize (object);
}
static gboolean
gdk_pixbuf_ani_anim_iter_advance (GdkPixbufAnimationIter *anim_iter,
const GTimeVal *current_time)
{
GdkPixbufAniAnimIter *iter;
gint elapsed;
gint tmp;
gint old;
iter = GDK_PIXBUF_ANI_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->ani_anim->total_time > 0);
/* See how many times we've already played the full animation,
* and subtract time for that.
*/
elapsed = elapsed % iter->ani_anim->total_time;
iter->position = elapsed;
/* Now move to the proper frame */
iter->elapsed = 0;
for (tmp = 0; tmp < iter->ani_anim->n_frames; tmp++) {
if (iter->position >= iter->elapsed &&
iter->position < (iter->elapsed + iter->ani_anim->delay[tmp]))
break;
iter->elapsed += iter->ani_anim->delay[tmp];
}
old = iter->current_frame;
iter->current_frame = tmp;
return iter->current_frame != old;
}
int
gdk_pixbuf_ani_anim_iter_get_delay_time (GdkPixbufAnimationIter *anim_iter)
{
GdkPixbufAniAnimIter *iter;
iter = GDK_PIXBUF_ANI_ANIM_ITER (anim_iter);
return iter->ani_anim->delay[iter->current_frame] - (iter->position - iter->elapsed);
}
GdkPixbuf*
gdk_pixbuf_ani_anim_iter_get_pixbuf (GdkPixbufAnimationIter *anim_iter)
{
GdkPixbufAniAnimIter *iter;
gint frame;
iter = GDK_PIXBUF_ANI_ANIM_ITER (anim_iter);
frame = iter->ani_anim->sequence[iter->current_frame];
/* this is necessary if the animation is displayed while loading */
while (frame > 0 && !iter->ani_anim->pixbufs[frame])
frame--;
return iter->ani_anim->pixbufs[frame];
}
static gboolean
gdk_pixbuf_ani_anim_iter_on_currently_loading_frame (GdkPixbufAnimationIter *anim_iter)
{
GdkPixbufAniAnimIter *iter;
gint frame;
iter = GDK_PIXBUF_ANI_ANIM_ITER (anim_iter);
if (iter->current_frame >= iter->ani_anim->n_frames - 1)
return TRUE;
frame = iter->ani_anim->sequence[iter->current_frame + 1];
if (!iter->ani_anim->pixbufs[frame])
return TRUE;
return FALSE;
}