New loader, for .ANI animations.

	* io-ani.c, io-ani-animation.h, io-ani-animation.c,
	pixbufloader_ani.def, Makefile.am, gdk-pixbuf-io.c: New loader,
	for .ANI animations.

1 files changed, 347 insertions, 0 deletions

diff --git a/gdk-pixbuf/io-ani-animation.c b/gdk-pixbuf/io-ani-animation.c
new file mode 100644
index 0000000000..07e70368a5
--- /dev/null
+++ b/gdk-pixbuf/io-ani-animation.c
@@ -0,0 +1,347 @@
+/* -*- 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) {
+                static 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,
+                                                      "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) {
+                static 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,
+                                                      "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;
+}
+
+
+
+
+
+
+
+
+
+