1/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
2/* GdkPixbuf library - GIF loader declarations
3 *
4 * Copyright (C) 1999 The Free Software Foundation
5 *
6 * Authors: Mark Crichton <crichton@gimp.org>
7 * Miguel de Icaza <miguel@gnu.org>
8 * Federico Mena-Quintero <federico@gimp.org>
9 * Havoc Pennington <hp@redhat.com>
10 *
11 * This library is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2 of the License, or (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
23 */
24
25#ifndef GDK_PIXBUF_GIF_H
26#define GDK_PIXBUF_GIF_H
27
28#include "gdk-pixbuf-animation.h"
29
30typedef enum {
31 /* Keep this frame and composite next frame over it */
32 /* (GIF disposal method 1) */
33 GDK_PIXBUF_FRAME_RETAIN,
34 /* Revert to background color before compositing next frame */
35 /* (GIF disposal method 2) */
36 GDK_PIXBUF_FRAME_DISPOSE,
37 /* Revert to previously-displayed composite image after
38 * displaying this frame
39 */
40 /* (GIF disposal method 3) */
41 GDK_PIXBUF_FRAME_REVERT
42} GdkPixbufFrameAction;
43
44
45
46typedef struct _GdkPixbufGifAnim GdkPixbufGifAnim;
47typedef struct _GdkPixbufGifAnimClass GdkPixbufGifAnimClass;
48typedef struct _GdkPixbufFrame GdkPixbufFrame;
49
50#define GDK_TYPE_PIXBUF_GIF_ANIM (gdk_pixbuf_gif_anim_get_type ())
51#define GDK_PIXBUF_GIF_ANIM(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_PIXBUF_GIF_ANIM, GdkPixbufGifAnim))
52#define GDK_IS_PIXBUF_GIF_ANIM(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_PIXBUF_GIF_ANIM))
53
54#define GDK_PIXBUF_GIF_ANIM_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_PIXBUF_GIF_ANIM, GdkPixbufGifAnimClass))
55#define GDK_IS_PIXBUF_GIF_ANIM_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_PIXBUF_GIF_ANIM))
56#define GDK_PIXBUF_GIF_ANIM_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_PIXBUF_GIF_ANIM, GdkPixbufGifAnimClass))
57
58/* Private part of the GdkPixbufGifAnim structure */
59struct _GdkPixbufGifAnim {
60 GdkPixbufAnimation parent_instance;
61
62 /* Total length of animation */
63 int total_time;
64
65 /* Color map */
66 guchar color_map[256 * 3];
67
68 /* List of GdkPixbufFrame structures */
69 GList *frames;
70
71 /* bounding box size */
72 int width, height;
73
74 int loop;
75
76 /* Last rendered frames */
77 GdkPixbuf *last_frame_data;
78 GdkPixbufFrame *last_frame;
79 GdkPixbuf *last_frame_revert_data;
80};
81
82struct _GdkPixbufGifAnimClass {
83 GdkPixbufAnimationClass parent_class;
84
85};
86
87GType gdk_pixbuf_gif_anim_get_type (void) G_GNUC_CONST;
88
89
90
91typedef struct _GdkPixbufGifAnimIter GdkPixbufGifAnimIter;
92typedef struct _GdkPixbufGifAnimIterClass GdkPixbufGifAnimIterClass;
93
94
95#define GDK_TYPE_PIXBUF_GIF_ANIM_ITER (gdk_pixbuf_gif_anim_iter_get_type ())
96#define GDK_PIXBUF_GIF_ANIM_ITER(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_PIXBUF_GIF_ANIM_ITER, GdkPixbufGifAnimIter))
97#define GDK_IS_PIXBUF_GIF_ANIM_ITER(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_PIXBUF_GIF_ANIM_ITER))
98
99#define GDK_PIXBUF_GIF_ANIM_ITER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_PIXBUF_GIF_ANIM_ITER, GdkPixbufGifAnimIterClass))
100#define GDK_IS_PIXBUF_GIF_ANIM_ITER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_PIXBUF_GIF_ANIM_ITER))
101#define GDK_PIXBUF_GIF_ANIM_ITER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_PIXBUF_GIF_ANIM_ITER, GdkPixbufGifAnimIterClass))
102
103G_GNUC_BEGIN_IGNORE_DEPRECATIONS
104struct _GdkPixbufGifAnimIter {
105 GdkPixbufAnimationIter parent_instance;
106
107 GdkPixbufGifAnim *gif_anim;
108
109 GTimeVal start_time;
110 GTimeVal current_time;
111
112 /* Time in milliseconds into this run of the animation */
113 gint position;
114
115 GList *current_frame;
116
117 gint first_loop_slowness;
118};
119G_GNUC_END_IGNORE_DEPRECATIONS
120
121struct _GdkPixbufGifAnimIterClass {
122 GdkPixbufAnimationIterClass parent_class;
123
124};
125
126GType gdk_pixbuf_gif_anim_iter_get_type (void) G_GNUC_CONST;
127
128
129
130struct _GdkPixbufFrame {
131 /* Compressed frame data */
132 GByteArray *lzw_data;
133 guint8 lzw_code_size;
134
135 /* Position of frame data in image */
136 int x_offset;
137 int y_offset;
138 guint16 width;
139 guint16 height;
140
141 /* Layout of pixels */
142 gboolean interlace;
143
144 /* Color map */
145 gboolean color_map_allocated;
146 guchar *color_map;
147
148 /* Transparency */
149 int transparent_index;
150
151 /* Frame duration in ms */
152 int delay_time;
153
154 /* Sum of preceding delay times */
155 int elapsed;
156
157 /* Overlay mode */
158 GdkPixbufFrameAction action;
159};
160
161#endif
162

source code of gtk/subprojects/gdk-pixbuf/gdk-pixbuf/io-gif-animation.h