ReactOS 0.4.15-dev-6057-gd708c79
djpeg.c File Reference
#include "cdjpeg.h"
#include "jversion.h"
#include <ctype.h>
#include "cderror.h"
Include dependency graph for djpeg.c:

Go to the source code of this file.

Macros

#define JMESSAGE(code, string)   string ,
 
#define DEFAULT_FMT   FMT_PPM
 

Enumerations

enum  IMAGE_FORMATS {
  FMT_BMP , FMT_GIF , FMT_GIF0 , FMT_OS2 ,
  FMT_PPM , FMT_RLE , FMT_TARGA , FMT_TIFF
}
 

Functions

 usage (void)
 
 parse_switches (j_decompress_ptr cinfo, int argc, char **argv, int last_file_arg_seen, boolean for_real)
 
 jpeg_getc (j_decompress_ptr cinfo)
 
 print_text_marker (j_decompress_ptr cinfo)
 
int main (int argc, char **argv)
 

Variables

static const char *const cdjpeg_message_table []
 
static IMAGE_FORMATS requested_fmt
 
static const charprogname
 
static charoutfilename
 

Macro Definition Documentation

◆ DEFAULT_FMT

#define DEFAULT_FMT   FMT_PPM

Definition at line 72 of file djpeg.c.

◆ JMESSAGE

#define JMESSAGE (   code,
  string 
)    string ,

Definition at line 45 of file djpeg.c.

Enumeration Type Documentation

◆ IMAGE_FORMATS

Enumerator
FMT_BMP 
FMT_GIF 
FMT_GIF0 
FMT_OS2 
FMT_PPM 
FMT_RLE 
FMT_TARGA 
FMT_TIFF 

Definition at line 60 of file djpeg.c.

60 {
61 FMT_BMP, /* BMP format (Windows flavor) */
62 FMT_GIF, /* GIF format (LZW compressed) */
63 FMT_GIF0, /* GIF format (uncompressed) */
64 FMT_OS2, /* BMP format (OS/2 flavor) */
65 FMT_PPM, /* PPM/PGM (PBMPLUS formats) */
66 FMT_RLE, /* RLE format */
67 FMT_TARGA, /* Targa format */
68 FMT_TIFF /* TIFF format */
IMAGE_FORMATS
Definition: djpeg.c:60
@ FMT_BMP
Definition: djpeg.c:61
@ FMT_TARGA
Definition: djpeg.c:67
@ FMT_TIFF
Definition: djpeg.c:68
@ FMT_GIF
Definition: djpeg.c:62
@ FMT_RLE
Definition: djpeg.c:66
@ FMT_PPM
Definition: djpeg.c:65
@ FMT_GIF0
Definition: djpeg.c:63
@ FMT_OS2
Definition: djpeg.c:64

Function Documentation

◆ jpeg_getc()

jpeg_getc ( j_decompress_ptr  cinfo)

Definition at line 367 of file djpeg.c.

369{
370 struct jpeg_source_mgr * datasrc = cinfo->src;
371
372 if (datasrc->bytes_in_buffer == 0) {
373 if (! (*datasrc->fill_input_buffer) (cinfo))
374 ERREXIT(cinfo, JERR_CANT_SUSPEND);
375 }
376 datasrc->bytes_in_buffer--;
377 return GETJOCTET(*datasrc->next_input_byte++);
378}
#define GETJOCTET(value)
Definition: jmorecfg.h:171
#define ERREXIT(msg)
Definition: rdjpgcom.c:72
struct jpeg_source_mgr * src
Definition: jpeglib.h:463
size_t bytes_in_buffer
Definition: jpeglib.h:786
const JOCTET * next_input_byte
Definition: jpeglib.h:785

Referenced by print_text_marker().

◆ main()

int main ( int argc  ,
char **  argv 
)

Definition at line 437 of file djpeg.c.

438{
439 struct jpeg_decompress_struct cinfo;
440 struct jpeg_error_mgr jerr;
441#ifdef PROGRESS_REPORT
443#endif
444 int file_index;
445 djpeg_dest_ptr dest_mgr = NULL;
446 FILE * input_file;
447 FILE * output_file;
448 JDIMENSION num_scanlines;
449
450 /* On Mac, fetch a command line. */
451#ifdef USE_CCOMMAND
452 argc = ccommand(&argv);
453#endif
454
455 progname = argv[0];
456 if (progname == NULL || progname[0] == 0)
457 progname = "djpeg"; /* in case C library doesn't provide it */
458
459 /* Initialize the JPEG decompression object with default error handling. */
460 cinfo.err = jpeg_std_error(&jerr);
462 /* Add some application-specific error messages (from cderror.h) */
463 jerr.addon_message_table = cdjpeg_message_table;
464 jerr.first_addon_message = JMSG_FIRSTADDONCODE;
465 jerr.last_addon_message = JMSG_LASTADDONCODE;
466
467 /* Insert custom marker processor for COM and APP12.
468 * APP12 is used by some digital camera makers for textual info,
469 * so we provide the ability to display it as text.
470 * If you like, additional APPn marker types can be selected for display,
471 * but don't try to override APP0 or APP14 this way (see libjpeg.txt).
472 */
475
476 /* Now safe to enable signal catcher. */
477#ifdef NEED_SIGNAL_CATCHER
478 enable_signal_catcher((j_common_ptr) &cinfo);
479#endif
480
481 /* Scan command line to find file names. */
482 /* It is convenient to use just one switch-parsing routine, but the switch
483 * values read here are ignored; we will rescan the switches after opening
484 * the input file.
485 * (Exception: tracing level set here controls verbosity for COM markers
486 * found during jpeg_read_header...)
487 */
488
489 file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
490
491#ifdef TWO_FILE_COMMANDLINE
492 /* Must have either -outfile switch or explicit output file name */
493 if (outfilename == NULL) {
494 if (file_index != argc-2) {
495 fprintf(stderr, "%s: must name one input and one output file\n",
496 progname);
497 usage();
498 }
499 outfilename = argv[file_index+1];
500 } else {
501 if (file_index != argc-1) {
502 fprintf(stderr, "%s: must name one input and one output file\n",
503 progname);
504 usage();
505 }
506 }
507#else
508 /* Unix style: expect zero or one file name */
509 if (file_index < argc-1) {
510 fprintf(stderr, "%s: only one input file\n", progname);
511 usage();
512 }
513#endif /* TWO_FILE_COMMANDLINE */
514
515 /* Open the input file. */
516 if (file_index < argc) {
517 if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
518 fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
520 }
521 } else {
522 /* default input file is stdin */
523 input_file = read_stdin();
524 }
525
526 /* Open the output file. */
527 if (outfilename != NULL) {
528 if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
529 fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
531 }
532 } else {
533 /* default output file is stdout */
534 output_file = write_stdout();
535 }
536
537#ifdef PROGRESS_REPORT
538 start_progress_monitor((j_common_ptr) &cinfo, &progress);
539#endif
540
541 /* Specify data source for decompression */
542 jpeg_stdio_src(&cinfo, input_file);
543
544 /* Read file header, set default decompression parameters */
545 (void) jpeg_read_header(&cinfo, TRUE);
546
547 /* Adjust default decompression parameters by re-parsing the options */
548 file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
549
550 /* Initialize the output module now to let it override any crucial
551 * option settings (for instance, GIF wants to force color quantization).
552 */
553 switch (requested_fmt) {
554#ifdef BMP_SUPPORTED
555 case FMT_BMP:
556 dest_mgr = jinit_write_bmp(&cinfo, FALSE);
557 break;
558 case FMT_OS2:
559 dest_mgr = jinit_write_bmp(&cinfo, TRUE);
560 break;
561#endif
562#ifdef GIF_SUPPORTED
563 case FMT_GIF:
564 dest_mgr = jinit_write_gif(&cinfo, TRUE);
565 break;
566 case FMT_GIF0:
567 dest_mgr = jinit_write_gif(&cinfo, FALSE);
568 break;
569#endif
570#ifdef PPM_SUPPORTED
571 case FMT_PPM:
572 dest_mgr = jinit_write_ppm(&cinfo);
573 break;
574#endif
575#ifdef RLE_SUPPORTED
576 case FMT_RLE:
577 dest_mgr = jinit_write_rle(&cinfo);
578 break;
579#endif
580#ifdef TARGA_SUPPORTED
581 case FMT_TARGA:
582 dest_mgr = jinit_write_targa(&cinfo);
583 break;
584#endif
585 default:
586 ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT);
587 }
588 dest_mgr->output_file = output_file;
589
590 /* Start decompressor */
591 (void) jpeg_start_decompress(&cinfo);
592
593 /* Write output file header */
594 (*dest_mgr->start_output) (&cinfo, dest_mgr);
595
596 /* Process data */
597 while (cinfo.output_scanline < cinfo.output_height) {
598 num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
599 dest_mgr->buffer_height);
600 (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
601 }
602
603#ifdef PROGRESS_REPORT
604 /* Hack: count final pass as done in case finish_output does an extra pass.
605 * The library won't have updated completed_passes.
606 */
607 progress.pub.completed_passes = progress.pub.total_passes;
608#endif
609
610 /* Finish decompression and release memory.
611 * I must do it in this order because output module has allocated memory
612 * of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
613 */
614 (*dest_mgr->finish_output) (&cinfo, dest_mgr);
617
618 /* Close files, if we opened them */
619 if (input_file != stdin)
620 fclose(input_file);
621 if (output_file != stdout)
622 fclose(output_file);
623
624#ifdef PROGRESS_REPORT
625 end_progress_monitor((j_common_ptr) &cinfo);
626#endif
627
628 /* All done. */
629 exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
630 return 0; /* suppress no-return-value warnings */
631}
static int argc
Definition: ServiceArgs.c:12
read_stdin(void)
Definition: cdjpeg.c:149
write_stdout(void)
Definition: cdjpeg.c:167
cd_progress_ptr progress
Definition: cdjpeg.h:152
#define EXIT_WARNING
Definition: cdjpeg.h:187
static IMAGE_FORMATS requested_fmt
Definition: djpeg.c:75
static const char *const cdjpeg_message_table[]
Definition: djpeg.c:47
print_text_marker(j_decompress_ptr cinfo)
Definition: djpeg.c:382
static char * outfilename
Definition: djpeg.c:88
usage(void)
Definition: djpeg.c:92
static const char * progname
Definition: djpeg.c:87
parse_switches(j_decompress_ptr cinfo, int argc, char **argv, int last_file_arg_seen, boolean for_real)
Definition: djpeg.c:167
#define NULL
Definition: types.h:112
#define TRUE
Definition: types.h:120
#define FALSE
Definition: types.h:117
#define stdout
Definition: stdio.h:99
#define stderr
Definition: stdio.h:100
_Check_return_opt_ _CRTIMP int __cdecl fprintf(_Inout_ FILE *_File, _In_z_ _Printf_format_string_ const char *_Format,...)
_Check_return_ _CRTIMP FILE *__cdecl fopen(_In_z_ const char *_Filename, _In_z_ const char *_Mode)
#define stdin
Definition: stdio.h:98
_Check_return_opt_ _CRTIMP int __cdecl fclose(_Inout_ FILE *_File)
jpeg_destroy_decompress(j_decompress_ptr cinfo)
Definition: jdapimin.c:92
jpeg_finish_decompress(j_decompress_ptr cinfo)
Definition: jdapimin.c:373
jpeg_read_header(j_decompress_ptr cinfo, boolean require_image)
Definition: jdapimin.c:245
jpeg_read_scanlines(j_decompress_ptr cinfo, JSAMPARRAY scanlines, JDIMENSION max_lines)
Definition: jdapistd.c:153
jpeg_stdio_src(j_decompress_ptr cinfo, FILE *infile)
Definition: jdatasrc.c:212
jpeg_set_marker_processor(j_decompress_ptr cinfo, int marker_code, jpeg_marker_parser_method routine)
Definition: jdmarker.c:1494
#define EXIT_FAILURE
Definition: jerror.c:33
jpeg_std_error(struct jpeg_error_mgr *err)
Definition: jerror.c:232
#define READ_BINARY
Definition: jmemdos.c:77
unsigned int JDIMENSION
Definition: jmorecfg.h:229
#define jpeg_create_decompress(cinfo)
Definition: jpeglib.h:962
#define JPEG_COM
Definition: jpeglib.h:1129
#define JPEG_APP0
Definition: jpeglib.h:1128
#define argv
Definition: mplay32.c:18
#define EXIT_SUCCESS
Definition: rdjpgcom.c:55
#define exit(n)
Definition: config.h:202
struct jpeg_progress_mgr pub
Definition: cdjpeg.h:83
FILE * output_file
Definition: cdjpeg.h:63
JDIMENSION buffer_height
Definition: cdjpeg.h:70
JSAMPARRAY buffer
Definition: cdjpeg.h:69
#define WRITE_BINARY
Definition: wrjpgcom.c:47

◆ parse_switches()

parse_switches ( j_decompress_ptr  cinfo,
int  argc,
char **  argv,
int  last_file_arg_seen,
boolean  for_real 
)

Definition at line 167 of file djpeg.c.

177{
178 int argn;
179 char * arg;
180
181 /* Set up default JPEG parameters. */
182 requested_fmt = DEFAULT_FMT; /* set default output file format */
184 cinfo->err->trace_level = 0;
185
186 /* Scan command line options, adjust parameters */
187
188 for (argn = 1; argn < argc; argn++) {
189 arg = argv[argn];
190 if (*arg != '-') {
191 /* Not a switch, must be a file name argument */
192 if (argn <= last_file_arg_seen) {
193 outfilename = NULL; /* -outfile applies to just one input file */
194 continue; /* ignore this name if previously processed */
195 }
196 break; /* else done parsing switches */
197 }
198 arg++; /* advance past switch marker character */
199
200 if (keymatch(arg, "bmp", 1)) {
201 /* BMP output format (Windows flavor). */
203
204 } else if (keymatch(arg, "colors", 1) || keymatch(arg, "colours", 1) ||
205 keymatch(arg, "quantize", 1) || keymatch(arg, "quantise", 1)) {
206 /* Do color quantization. */
207 int val;
208
209 if (++argn >= argc) /* advance to next argument */
210 usage();
211 if (sscanf(argv[argn], "%d", &val) != 1)
212 usage();
214 cinfo->quantize_colors = TRUE;
215
216 } else if (keymatch(arg, "dct", 2)) {
217 /* Select IDCT algorithm. */
218 if (++argn >= argc) /* advance to next argument */
219 usage();
220 if (keymatch(argv[argn], "int", 1)) {
221 cinfo->dct_method = JDCT_ISLOW;
222 } else if (keymatch(argv[argn], "fast", 2)) {
223 cinfo->dct_method = JDCT_IFAST;
224 } else if (keymatch(argv[argn], "float", 2)) {
225 cinfo->dct_method = JDCT_FLOAT;
226 } else
227 usage();
228
229 } else if (keymatch(arg, "dither", 2)) {
230 /* Select dithering algorithm. */
231 if (++argn >= argc) /* advance to next argument */
232 usage();
233 if (keymatch(argv[argn], "fs", 2)) {
234 cinfo->dither_mode = JDITHER_FS;
235 } else if (keymatch(argv[argn], "none", 2)) {
236 cinfo->dither_mode = JDITHER_NONE;
237 } else if (keymatch(argv[argn], "ordered", 2)) {
239 } else
240 usage();
241
242 } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
243 /* Enable debug printouts. */
244 /* On first -d, print version identification */
245 static boolean printed_version = FALSE;
246
247 if (! printed_version) {
248 fprintf(stderr, "Independent JPEG Group's DJPEG, version %s\n%s\n",
250 printed_version = TRUE;
251 }
252 cinfo->err->trace_level++;
253
254 } else if (keymatch(arg, "fast", 1)) {
255 /* Select recommended processing options for quick-and-dirty output. */
256 cinfo->two_pass_quantize = FALSE;
258 if (! cinfo->quantize_colors) /* don't override an earlier -colors */
259 cinfo->desired_number_of_colors = 216;
260 cinfo->dct_method = JDCT_FASTEST;
261 cinfo->do_fancy_upsampling = FALSE;
262
263 } else if (keymatch(arg, "gif", 1)) {
264 /* GIF output format (LZW compressed). */
266
267 } else if (keymatch(arg, "gif0", 4)) {
268 /* GIF output format (uncompressed). */
270
271 } else if (keymatch(arg, "grayscale", 2) || keymatch(arg, "greyscale",2)) {
272 /* Force monochrome output. */
274
275 } else if (keymatch(arg, "rgb", 3)) {
276 /* Force RGB output. */
277 cinfo->out_color_space = JCS_RGB;
278
279 } else if (keymatch(arg, "map", 3)) {
280 /* Quantize to a color map taken from an input file. */
281 if (++argn >= argc) /* advance to next argument */
282 usage();
283 if (for_real) { /* too expensive to do twice! */
284#ifdef QUANT_2PASS_SUPPORTED /* otherwise can't quantize to supplied map */
285 FILE * mapfile;
286
287 if ((mapfile = fopen(argv[argn], READ_BINARY)) == NULL) {
288 fprintf(stderr, "%s: can't open %s\n", progname, argv[argn]);
290 }
291 read_color_map(cinfo, mapfile);
292 fclose(mapfile);
293 cinfo->quantize_colors = TRUE;
294#else
295 ERREXIT(cinfo, JERR_NOT_COMPILED);
296#endif
297 }
298
299 } else if (keymatch(arg, "maxmemory", 3)) {
300 /* Maximum memory in Kb (or Mb with 'm'). */
301 long lval;
302 char ch = 'x';
303
304 if (++argn >= argc) /* advance to next argument */
305 usage();
306 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
307 usage();
308 if (ch == 'm' || ch == 'M')
309 lval *= 1000L;
310 cinfo->mem->max_memory_to_use = lval * 1000L;
311
312 } else if (keymatch(arg, "nosmooth", 3)) {
313 /* Suppress fancy upsampling. */
314 cinfo->do_fancy_upsampling = FALSE;
315
316 } else if (keymatch(arg, "onepass", 3)) {
317 /* Use fast one-pass quantization. */
318 cinfo->two_pass_quantize = FALSE;
319
320 } else if (keymatch(arg, "os2", 3)) {
321 /* BMP output format (OS/2 flavor). */
323
324 } else if (keymatch(arg, "outfile", 4)) {
325 /* Set output file name. */
326 if (++argn >= argc) /* advance to next argument */
327 usage();
328 outfilename = argv[argn]; /* save it away for later use */
329
330 } else if (keymatch(arg, "pnm", 1) || keymatch(arg, "ppm", 1)) {
331 /* PPM/PGM output format. */
333
334 } else if (keymatch(arg, "rle", 1)) {
335 /* RLE output format. */
337
338 } else if (keymatch(arg, "scale", 1)) {
339 /* Scale the output image by a fraction M/N. */
340 if (++argn >= argc) /* advance to next argument */
341 usage();
342 if (sscanf(argv[argn], "%u/%u",
343 &cinfo->scale_num, &cinfo->scale_denom) < 1)
344 usage();
345
346 } else if (keymatch(arg, "targa", 1)) {
347 /* Targa output format. */
349
350 } else {
351 usage(); /* bogus switch */
352 }
353 }
354
355 return argn; /* return index of next arg (file name) */
356}
keymatch(char *arg, const char *keyword, int minchars)
Definition: cdjpeg.c:122
#define DEFAULT_FMT
Definition: djpeg.c:72
GLuint GLfloat * val
Definition: glext.h:7180
_Check_return_ _CRTIMP int __cdecl sscanf(_In_z_ const char *_Src, _In_z_ _Scanf_format_string_ const char *_Format,...)
@ JDITHER_NONE
Definition: jpeglib.h:256
@ JDITHER_FS
Definition: jpeglib.h:258
@ JDITHER_ORDERED
Definition: jpeglib.h:257
@ JCS_GRAYSCALE
Definition: jpeglib.h:222
@ JCS_RGB
Definition: jpeglib.h:223
#define JDCT_FASTEST
Definition: jpeglib.h:250
@ JDCT_IFAST
Definition: jpeglib.h:242
@ JDCT_FLOAT
Definition: jpeglib.h:243
@ JDCT_ISLOW
Definition: jpeglib.h:241
#define JVERSION
Definition: jversion.h:12
#define JCOPYRIGHT
Definition: jversion.h:14
boolean two_pass_quantize
Definition: jpeglib.h:494
boolean quantize_colors
Definition: jpeglib.h:491
boolean do_fancy_upsampling
Definition: jpeglib.h:488
J_COLOR_SPACE out_color_space
Definition: jpeglib.h:478
unsigned int scale_num
Definition: jpeglib.h:480
unsigned int scale_denom
Definition: jpeglib.h:480
J_DITHER_MODE dither_mode
Definition: jpeglib.h:493
J_DCT_METHOD dct_method
Definition: jpeglib.h:487
void * arg
Definition: msvc.h:10

Referenced by main().

◆ print_text_marker()

print_text_marker ( j_decompress_ptr  cinfo)

Definition at line 382 of file djpeg.c.

383{
384 boolean traceit = (cinfo->err->trace_level >= 1);
386 unsigned int ch;
387 unsigned int lastch = 0;
388
389 length = jpeg_getc(cinfo) << 8;
390 length += jpeg_getc(cinfo);
391 length -= 2; /* discount the length word itself */
392
393 if (traceit) {
394 if (cinfo->unread_marker == JPEG_COM)
395 fprintf(stderr, "Comment, length %ld:\n", (long) length);
396 else /* assume it is an APPn otherwise */
397 fprintf(stderr, "APP%d, length %ld:\n",
398 cinfo->unread_marker - JPEG_APP0, (long) length);
399 }
400
401 while (--length >= 0) {
402 ch = jpeg_getc(cinfo);
403 if (traceit) {
404 /* Emit the character in a readable form.
405 * Nonprintables are converted to \nnn form,
406 * while \ is converted to \\.
407 * Newlines in CR, CR/LF, or LF form will be printed as one newline.
408 */
409 if (ch == '\r') {
410 fprintf(stderr, "\n");
411 } else if (ch == '\n') {
412 if (lastch != '\r')
413 fprintf(stderr, "\n");
414 } else if (ch == '\\') {
415 fprintf(stderr, "\\\\");
416 } else if (isprint(ch)) {
417 putc(ch, stderr);
418 } else {
419 fprintf(stderr, "\\%03o", ch);
420 }
421 lastch = ch;
422 }
423 }
424
425 if (traceit)
426 fprintf(stderr, "\n");
427
428 return TRUE;
429}
signed int INT32
#define isprint(c)
Definition: acclib.h:73
jpeg_getc(j_decompress_ptr cinfo)
Definition: djpeg.c:367
GLuint GLsizei GLsizei * length
Definition: glext.h:6040
_Check_return_opt_ _CRTIMP int __cdecl putc(_In_ int _Ch, _Inout_ FILE *_File)

Referenced by main().

◆ usage()

usage ( void  )

Definition at line 92 of file djpeg.c.

94{
95 fprintf(stderr, "usage: %s [switches] ", progname);
96#ifdef TWO_FILE_COMMANDLINE
97 fprintf(stderr, "inputfile outputfile\n");
98#else
99 fprintf(stderr, "[inputfile]\n");
100#endif
101
102 fprintf(stderr, "Switches (names may be abbreviated):\n");
103 fprintf(stderr, " -colors N Reduce image to no more than N colors\n");
104 fprintf(stderr, " -fast Fast, low-quality processing\n");
105 fprintf(stderr, " -grayscale Force grayscale output\n");
106 fprintf(stderr, " -rgb Force RGB output\n");
107#ifdef IDCT_SCALING_SUPPORTED
108 fprintf(stderr, " -scale M/N Scale output image by fraction M/N, eg, 1/8\n");
109#endif
110#ifdef BMP_SUPPORTED
111 fprintf(stderr, " -bmp Select BMP output format (Windows style)%s\n",
112 (DEFAULT_FMT == FMT_BMP ? " (default)" : ""));
113#endif
114#ifdef GIF_SUPPORTED
115 fprintf(stderr, " -gif Select GIF output format (LZW compressed)%s\n",
116 (DEFAULT_FMT == FMT_GIF ? " (default)" : ""));
117 fprintf(stderr, " -gif0 Select GIF output format (uncompressed)%s\n",
118 (DEFAULT_FMT == FMT_GIF0 ? " (default)" : ""));
119#endif
120#ifdef BMP_SUPPORTED
121 fprintf(stderr, " -os2 Select BMP output format (OS/2 style)%s\n",
122 (DEFAULT_FMT == FMT_OS2 ? " (default)" : ""));
123#endif
124#ifdef PPM_SUPPORTED
125 fprintf(stderr, " -pnm Select PBMPLUS (PPM/PGM) output format%s\n",
126 (DEFAULT_FMT == FMT_PPM ? " (default)" : ""));
127#endif
128#ifdef RLE_SUPPORTED
129 fprintf(stderr, " -rle Select Utah RLE output format%s\n",
130 (DEFAULT_FMT == FMT_RLE ? " (default)" : ""));
131#endif
132#ifdef TARGA_SUPPORTED
133 fprintf(stderr, " -targa Select Targa output format%s\n",
134 (DEFAULT_FMT == FMT_TARGA ? " (default)" : ""));
135#endif
136 fprintf(stderr, "Switches for advanced users:\n");
137#ifdef DCT_ISLOW_SUPPORTED
138 fprintf(stderr, " -dct int Use integer DCT method%s\n",
139 (JDCT_DEFAULT == JDCT_ISLOW ? " (default)" : ""));
140#endif
141#ifdef DCT_IFAST_SUPPORTED
142 fprintf(stderr, " -dct fast Use fast integer DCT (less accurate)%s\n",
143 (JDCT_DEFAULT == JDCT_IFAST ? " (default)" : ""));
144#endif
145#ifdef DCT_FLOAT_SUPPORTED
146 fprintf(stderr, " -dct float Use floating-point DCT method%s\n",
147 (JDCT_DEFAULT == JDCT_FLOAT ? " (default)" : ""));
148#endif
149 fprintf(stderr, " -dither fs Use F-S dithering (default)\n");
150 fprintf(stderr, " -dither none Don't use dithering in quantization\n");
151 fprintf(stderr, " -dither ordered Use ordered dither (medium speed, quality)\n");
152#ifdef QUANT_2PASS_SUPPORTED
153 fprintf(stderr, " -map FILE Map to colors used in named image file\n");
154#endif
155 fprintf(stderr, " -nosmooth Don't use high-quality upsampling\n");
156#ifdef QUANT_1PASS_SUPPORTED
157 fprintf(stderr, " -onepass Use 1-pass quantization (fast, low quality)\n");
158#endif
159 fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
160 fprintf(stderr, " -outfile name Specify name for output file\n");
161 fprintf(stderr, " -verbose or -debug Emit debug output\n");
163}
#define JDCT_DEFAULT
Definition: jpeglib.h:247

Referenced by main(), and parse_switches().

Variable Documentation

◆ cdjpeg_message_table

const char* const cdjpeg_message_table[]
static
Initial value:
= {
}

Definition at line 47 of file djpeg.c.

Referenced by main().

◆ outfilename

char* outfilename
static

Definition at line 88 of file djpeg.c.

Referenced by main(), and parse_switches().

◆ progname

const char* progname
static

Definition at line 87 of file djpeg.c.

Referenced by main(), parse_switches(), and usage().

◆ requested_fmt

IMAGE_FORMATS requested_fmt
static

Definition at line 75 of file djpeg.c.

Referenced by main(), and parse_switches().