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Data Structures | |
| struct | gif_header |
| struct | gif_image |
Defines | |
| #define | COLTAB 0x80 |
| #define | COLMASK 0x70 |
| #define | COLSHIFT 4 |
| #define | PIXMASK 7 |
| #define | COLPIXVGA13 (COLTAB | (5<<COLSHIFT) | 7) |
| #define | ITLV_BIT 0x40 |
| #define | OUT_OF_MEMORY -10 |
| #define | BAD_CODE_SIZE -20 |
| #define | READ_ERROR -1 |
| #define | WRITE_ERROR -2 |
| #define | OPEN_ERROR -3 |
| #define | CREATE_ERROR -4 |
| #define | TOO_HIGH -5 |
Functions | |
| short | gif_compress_data (int min_code_size, unsigned char *pt, long size, FILE *out) |
| int | gif_decoder (int linewidth) |
| #define BAD_CODE_SIZE -20 |
| #define COLMASK 0x70 |
Definition at line 17 of file gifcodes.h.
| #define COLPIXVGA13 (COLTAB | (5<<COLSHIFT) | 7) |
| #define COLSHIFT 4 |
Definition at line 18 of file gifcodes.h.
| #define COLTAB 0x80 |
| #define CREATE_ERROR -4 |
Definition at line 44 of file gifcodes.h.
| #define ITLV_BIT 0x40 |
| #define OPEN_ERROR -3 |
Definition at line 43 of file gifcodes.h.
| #define OUT_OF_MEMORY -10 |
| #define PIXMASK 7 |
| #define READ_ERROR -1 |
| #define TOO_HIGH -5 |
Definition at line 45 of file gifcodes.h.
| #define WRITE_ERROR -2 |
Definition at line 42 of file gifcodes.h.
| short gif_compress_data | ( | int | min_code_size, | |
| unsigned char * | pt, | |||
| long | size, | |||
| FILE * | out | |||
| ) |
Definition at line 268 of file gifcomp.c.
References added_chars, code_ids, compress_data(), gentleFree(), gif_file, gif_wcount, gif_wpt, needMem(), prior_codes, and TABLE_SIZE.
Referenced by mgSaveToGif().
00269 { 00270 int ret; 00271 00272 /* Make sure min_code_size is reasonable. */ 00273 if (min_code_size < 2 || min_code_size > 9) 00274 { 00275 if (min_code_size == 1) 00276 min_code_size = 2; 00277 else 00278 return -3; 00279 } 00280 00281 /* Store input parameters where rest of routines can use. */ 00282 gif_file = out; 00283 gif_wpt = pt; 00284 gif_wcount = size; 00285 00286 ret = -2; /* out of memory default */ 00287 prior_codes = NULL; 00288 code_ids = NULL; 00289 added_chars = NULL; 00290 if ((prior_codes = (short*)needMem(TABLE_SIZE*sizeof(short))) == NULL) 00291 goto OUT; 00292 if ((code_ids = (short*)needMem(TABLE_SIZE*sizeof(short))) == NULL) 00293 goto OUT; 00294 if ((added_chars = (unsigned char*)needMem(TABLE_SIZE)) == NULL) 00295 goto OUT; 00296 00297 ret = compress_data(min_code_size); 00298 00299 OUT: 00300 gentleFree(prior_codes); 00301 gentleFree(code_ids); 00302 gentleFree(added_chars); 00303 return(ret); 00304 }
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| int gif_decoder | ( | int | linewidth | ) |
Definition at line 363 of file gifdecomp.c.
References decoder(), freeMem(), MAX_CODES, needMem(), OUT_OF_MEMORY, UBYTE, and UWORD.
00364 { 00365 UBYTE *buf, *stack, *suffix; 00366 UWORD *prefix; 00367 int ret; 00368 00369 ret = OUT_OF_MEMORY; 00370 stack = NULL; 00371 suffix = NULL; 00372 prefix = NULL; 00373 /* stack = suffix = (UBYTE *)prefix = NULL; */ 00374 if ((buf = (UBYTE *)needMem(linewidth + 1)) == NULL) 00375 goto OUT; 00376 if ((stack = (UBYTE *)needMem(MAX_CODES+1)) == NULL) 00377 goto OUT; 00378 if ((suffix = (UBYTE *)needMem(MAX_CODES+1)) == NULL) 00379 goto OUT; 00380 if ((prefix = (UWORD *)needMem((MAX_CODES+1)*sizeof(UWORD) )) == NULL) 00381 goto OUT; 00382 ret = decoder(linewidth,buf,stack,suffix,prefix); 00383 OUT: 00384 freeMem(buf); 00385 freeMem(stack); 00386 freeMem(prefix); 00387 freeMem(suffix); 00388 return(ret); 00389 }
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1.5.2