1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
/* cgif.h -- a merge of some GIF-decoding files from giflib by E.S.Raymond
* by pts@fazekas.hu at Wed Feb 27 13:18:04 CET 2002
The GIFLIB distribution is Copyright (c) 1997 Eric S. Raymond
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
/******************************************************************************
* In order to make life a little bit easier when using the GIF file format, *
* this library was written, and which does all the dirty work... *
* *
* Written by Gershon Elber, Jun. 1989 *
* Hacks by Eric S. Raymond, Sep. 1992 *
*******************************************************************************
* History: *
* 14 Jun 89 - Version 1.0 by Gershon Elber. *
* 3 Sep 90 - Version 1.1 by Gershon Elber (Support for Gif89, Unique names). *
* 15 Sep 90 - Version 2.0 by Eric S. Raymond (Changes to suoport GIF slurp) *
* 26 Jun 96 - Version 3.0 by Eric S. Raymond (Full GIF89 support)
******************************************************************************/
#ifndef CGIF_H
#define CGIF_H
#ifdef __GNUC__
#ifndef __clang__
#pragma interface
#endif
#endif
#include "config2.h" /* PTS_const */
#define GIF_LIB_VERSION " Version 3.0, "
#define GIF_ERROR 0
#define GIF_OK 1
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
#ifndef NULL
#define NULL 0
#endif /* NULL */
#if _MSC_VER > 1000
# undef __PROTOTYPES__
# define __PROTOTYPES__ 1
# pragma warning(disable: 4127) /* conditional expression is constant */
# pragma warning(disable: 4244) /* =' : conversion from 'int ' to 'unsigned char ', possible loss of data */
#endif
/* at Wed Dec 11 15:33:22 CET 2002 */
/* #define USE_CGIF_FDOPEN 1 */
#undef USE_CGIF_FDOPEN
#ifdef __cplusplus
class CGIF { public:
#define EXTERN static
#else
#define EXTERN extern
#endif
typedef int GifBooleanType;
typedef unsigned char GifPixelType;
typedef unsigned char * GifRowType;
typedef unsigned char GifByteType;
#define GIF_MESSAGE(Msg) fprintf(stderr, "\n%s: %s\n", PROGRAM_NAME, Msg)
#define GIF_EXIT(Msg) { GIF_MESSAGE(Msg); exit(-3); }
#ifdef SYSV
#define VoidPtr char *
#else
#define VoidPtr void *
#endif /* SYSV */
typedef struct GifColorType {
GifByteType Red, Green, Blue;
} GifColorType;
typedef struct ColorMapObject
{
int ColorCount;
int BitsPerPixel;
GifColorType *Colors; /* on malloc(3) heap */
}
ColorMapObject;
typedef struct GifImageDesc {
int Left, Top, Width, Height, /* Current image dimensions. */
Interlace; /* Sequential/Interlaced lines. */
ColorMapObject *ColorMap; /* The local color map */
} GifImageDesc;
struct SavedImage;
typedef struct GifFileType {
int SWidth, SHeight, /* Screen dimensions. */
SColorResolution, /* How many colors can we generate? */
SBackGroundColor; /* I hope you understand this one... */
ColorMapObject *SColorMap; /* NULL if not exists. */
int ImageCount; /* Number of current image */
/*GifImageDesc Image; */ /* Block describing current image */
struct SavedImage *SavedImages; /* Use this to accumulate file state */
VoidPtr Private; /* Don't mess with this! */
} GifFileType;
typedef enum {
UNDEFINED_RECORD_TYPE,
SCREEN_DESC_RECORD_TYPE,
IMAGE_DESC_RECORD_TYPE, /* Begin with ',' */
EXTENSION_RECORD_TYPE, /* Begin with '!' */
TERMINATE_RECORD_TYPE /* Begin with ';' */
} GifRecordType;
/******************************************************************************
* GIF89 extension function codes *
******************************************************************************/
#define COMMENT_EXT_FUNC_CODE 0xfe /* comment */
#define GRAPHICS_EXT_FUNC_CODE 0xf9 /* graphics control */
#define PLAINTEXT_EXT_FUNC_CODE 0x01 /* plaintext */
#define APPLICATION_EXT_FUNC_CODE 0xff /* application block */
/******************************************************************************
* O.K., here are the routines one can access in order to decode GIF file: *
* (GIF_LIB file DGIF_LIB.C). *
******************************************************************************/
EXTERN GifFileType *DGifOpenFileName(const char *GifFileName);
#if USE_CGIF_FDOPEN
EXTERN GifFileType *DGifOpenFileHandle(int GifFileHandle);
#endif
EXTERN GifFileType *DGifOpenFILE(void/*FILE*/ *f);
EXTERN int DGifSlurp(GifFileType *GifFile);
EXTERN int DGifGetScreenDesc(GifFileType *GifFile);
EXTERN int DGifGetRecordType(GifFileType *GifFile, GifRecordType *GifType);
EXTERN int DGifGetImageDesc(GifFileType *GifFile);
EXTERN int DGifGetLine(GifFileType *GifFile, GifPixelType *GifLine, int GifLineLen);
EXTERN int DGifGetPixel(GifFileType *GifFile, GifPixelType GifPixel);
EXTERN int DGifGetComment(GifFileType *GifFile, char *GifComment);
EXTERN int DGifGetExtension(GifFileType *GifFile, int *GifExtCode,
GifByteType **GifExtension);
EXTERN int DGifGetExtensionNext(GifFileType *GifFile, GifByteType **GifExtension);
EXTERN int DGifGetCode(GifFileType *GifFile, int *GifCodeSize,
GifByteType **GifCodeBlock);
EXTERN int DGifGetCodeNext(GifFileType *GifFile, GifByteType **GifCodeBlock);
EXTERN int DGifGetLZCodes(GifFileType *GifFile, int *GifCode);
EXTERN int DGifCloseFile(GifFileType *GifFile);
#define D_GIF_ERR_OPEN_FAILED 101 /* And DGif possible errors. */
#define D_GIF_ERR_READ_FAILED 102
#define D_GIF_ERR_NOT_GIF_FILE 103
#define D_GIF_ERR_NO_SCRN_DSCR 104
#define D_GIF_ERR_NO_IMAG_DSCR 105
#define D_GIF_ERR_NO_COLOR_MAP 106
#define D_GIF_ERR_WRONG_RECORD 107
#define D_GIF_ERR_DATA_TOO_BIG 108
#define D_GIF_ERR_NOT_ENOUGH_MEM 109
#define D_GIF_ERR_CLOSE_FAILED 110
#define D_GIF_ERR_NOT_READABLE 111
#define D_GIF_ERR_IMAGE_DEFECT 112
#define D_GIF_ERR_EOF_TOO_SOON 113
/******************************************************************************
* O.K., here are the routines from GIF_LIB file GIF_ERR.C. *
******************************************************************************/
EXTERN void PrintGifError(void);
EXTERN PTS_const char *GetGifError(void);
EXTERN int GifLastError(void);
/*****************************************************************************
*
* Everything below this point is new after version 1.2, supporting `slurp
* mode' for doing I/O in two big belts with all the image-bashing in core.
*
*****************************************************************************/
/******************************************************************************
* Color Map handling from ALLOCGIF.C *
******************************************************************************/
EXTERN ColorMapObject *MakeMapObject(int ColorCount, GifColorType *ColorMap);
EXTERN void FreeMapObject(ColorMapObject *Object);
/******************************************************************************
* Support for the in-core structures allocation (slurp mode). *
******************************************************************************/
/* This is the in-core version of an extension record */
typedef struct {
/** Extension code:
* 0xf9 Graphics Control extension (not stored!)
* 0xfe Comment extension
* 0xff Netscape Loop extension (not stored!)
* .... ???
*/
int code;
int ByteCount;
/**** pts ****/
GifByteType *Bytes; /* on malloc(3) heap */
} ExtensionBlock;
/* This holds an image header, its unpacked raster bits, and extensions */
typedef struct SavedImage {
GifImageDesc ImageDesc;
/**** pts ****/
GifPixelType *RasterBits; /* on malloc(3) heap */
int ExtensionBlockCount;
ExtensionBlock *ExtensionBlocks; /* on malloc(3) heap */
/**** pts ****/
/** from Graphics Control extension: 0..63 */
unsigned char dispose;
/** from Graphics Control extension: 0..65535 */
unsigned short delay;
/** from Graphics Control extension: transparency index: -1 or 0..255 */
signed short transp;
/** from Netscape Loop extension: iteration count: 0..65535 */
unsigned short iter;
} SavedImage;
EXTERN void MakeExtension(SavedImage *New, int Function);
EXTERN int AddExtensionBlock(SavedImage *New, int Len, GifByteType ExtData[]);
EXTERN void FreeExtension(SavedImage *Image);
EXTERN SavedImage *MakeSavedImage(GifFileType *GifFile, SavedImage *CopyFrom);
EXTERN void FreeSavedImages(GifFileType *GifFile);
#ifdef __cplusplus
static int _GifError;
};
#else
extern int _GifError;
#endif
#endif /* CGIF_H */
|
