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gifx.h

00001 #ifndef GIFX_H
00002 #define GIFX_H
00003 #ifdef __cplusplus
00004 extern "C" {
00005 #endif
00006 
00007 /* gifx.h - Functions to turn GIFs in memory into X Pixmaps.
00008    Copyright (C) 1997-9 Eddie Kohler, eddietwo@lcs.mit.edu
00009    This file is part of the GIF library.
00010 
00011    The GIF library is free software*. It is distributed under the GNU General
00012    Public License, version 2 or later; you can copy, distribute, or alter it
00013    at will, as long as this notice is kept intact and this source code is made
00014    available. There is no warranty, express or implied.
00015 
00016    *The LZW compression method used by GIFs is patented. Unisys, the patent
00017    holder, allows the compression algorithm to be used without a license in
00018    software distributed at no cost to the user. */
00019 
00020 #include "gif.h"
00021 #include <X11/Xlib.h>
00022 
00023 #define GIFX_COLORMAP_EXTENSION -107
00024 
00025 
00026 typedef struct Gif_XContext Gif_XContext;
00027 typedef struct Gif_XColormap Gif_XColormap;
00028 
00029 struct Gif_XContext {
00030   
00031   Display *display;
00032   int screen_number;
00033   Drawable drawable;
00034   Visual *visual;
00035   u_int16_t depth;
00036   u_int16_t ncolormap;
00037   Colormap colormap;
00038   
00039   u_int16_t nclosest;
00040   Gif_Color *closest;
00041   
00042   int free_deleted_colormap_pixels;
00043   Gif_XColormap *xcolormap;
00044   
00045   GC image_gc;
00046   GC mask_gc;
00047   
00048   unsigned long transparent_pixel;
00049   unsigned long foreground_pixel;
00050   int refcount;
00051   
00052 };
00053 
00054 
00055 Gif_XContext *  Gif_NewXContext(Display *, Window);
00056 Gif_XContext *  Gif_NewXContextFromVisual(Display *, int screen_number,
00057                                         Visual *, int depth, Colormap);
00058 void            Gif_DeleteXContext(Gif_XContext *);
00059 
00060 Pixmap          Gif_XImage(Gif_XContext *, Gif_Stream *, Gif_Image *);
00061 Pixmap          Gif_XImageColormap(Gif_XContext *, Gif_Stream *,
00062                                 Gif_Colormap *, Gif_Image *);
00063 Pixmap          Gif_XSubImage(Gif_XContext *, Gif_Stream *, Gif_Image *,
00064                                 int l, int t, int w, int h);
00065 Pixmap          Gif_XSubImageColormap(Gif_XContext *, Gif_Image *,
00066                                 Gif_Colormap *, int l, int t, int w, int h);
00067 
00068 Pixmap          Gif_XMask(Gif_XContext *, Gif_Stream *, Gif_Image *);
00069 Pixmap          Gif_XSubMask(Gif_XContext *, Gif_Image *,
00070                                 int l, int t, int w, int h);
00071 
00072 Pixmap          Gif_XNextImage(Gif_XContext *, Pixmap last_last, Pixmap last,
00073                                Gif_Stream *, int n);
00074 
00075 int             Gif_XAllocateColors(Gif_XContext *, Gif_Colormap *);
00076 void            Gif_XDeallocateColors(Gif_XContext *, Gif_Colormap *);
00077 unsigned long * Gif_XClaimStreamColors(Gif_XContext *, Gif_Stream *, int *);
00078 
00079 
00080 #ifdef __cplusplus
00081 }
00082 #endif
00083 #endif
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