ReactOS  0.4.15-dev-316-g938df97
jpegtran.c File Reference
#include "cdjpeg.h"
#include "transupp.h"
#include "jversion.h"
Include dependency graph for jpegtran.c:

Go to the source code of this file.

Functions

 usage (void)
 
 select_transform (JXFORM_CODE transform)
 
 parse_switches (j_compress_ptr cinfo, int argc, char **argv, int last_file_arg_seen, boolean for_real)
 
int main (int argc, char **argv)
 

Variables

static const charprogname
 
static charoutfilename
 
static chardropfilename
 
static charscaleoption
 
static JCOPY_OPTION copyoption
 
static jpeg_transform_info transformoption
 

Function Documentation

◆ main()

int main ( int argc  ,
char **  argv 
)

Definition at line 409 of file jpegtran.c.

410 {
411  struct jpeg_decompress_struct srcinfo;
412  struct jpeg_error_mgr jsrcerr;
413 #if TRANSFORMS_SUPPORTED
414  struct jpeg_decompress_struct dropinfo;
415  struct jpeg_error_mgr jdroperr;
416  FILE * drop_file;
417 #endif
419  struct jpeg_error_mgr jdsterr;
420 #ifdef PROGRESS_REPORT
422 #endif
423  jvirt_barray_ptr * src_coef_arrays;
424  jvirt_barray_ptr * dst_coef_arrays;
425  int file_index;
426  /* We assume all-in-memory processing and can therefore use only a
427  * single file pointer for sequential input and output operation.
428  */
429  FILE * fp;
430 
431  /* On Mac, fetch a command line. */
432 #ifdef USE_CCOMMAND
433  argc = ccommand(&argv);
434 #endif
435 
436  progname = argv[0];
437  if (progname == NULL || progname[0] == 0)
438  progname = "jpegtran"; /* in case C library doesn't provide it */
439 
440  /* Initialize the JPEG decompression object with default error handling. */
441  srcinfo.err = jpeg_std_error(&jsrcerr);
442  jpeg_create_decompress(&srcinfo);
443  /* Initialize the JPEG compression object with default error handling. */
444  dstinfo.err = jpeg_std_error(&jdsterr);
446 
447  /* Now safe to enable signal catcher.
448  * Note: we assume only the decompression object will have virtual arrays.
449  */
450 #ifdef NEED_SIGNAL_CATCHER
451  enable_signal_catcher((j_common_ptr) &srcinfo);
452 #endif
453 
454  /* Scan command line to find file names.
455  * It is convenient to use just one switch-parsing routine, but the switch
456  * values read here are mostly ignored; we will rescan the switches after
457  * opening the input file. Also note that most of the switches affect the
458  * destination JPEG object, so we parse into that and then copy over what
459  * needs to affect the source too.
460  */
461 
462  file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
463  jsrcerr.trace_level = jdsterr.trace_level;
464  srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
465 
466 #ifdef TWO_FILE_COMMANDLINE
467  /* Must have either -outfile switch or explicit output file name */
468  if (outfilename == NULL) {
469  if (file_index != argc-2) {
470  fprintf(stderr, "%s: must name one input and one output file\n",
471  progname);
472  usage();
473  }
474  outfilename = argv[file_index+1];
475  } else {
476  if (file_index != argc-1) {
477  fprintf(stderr, "%s: must name one input and one output file\n",
478  progname);
479  usage();
480  }
481  }
482 #else
483  /* Unix style: expect zero or one file name */
484  if (file_index < argc-1) {
485  fprintf(stderr, "%s: only one input file\n", progname);
486  usage();
487  }
488 #endif /* TWO_FILE_COMMANDLINE */
489 
490  /* Open the input file. */
491  if (file_index < argc) {
492  if ((fp = fopen(argv[file_index], READ_BINARY)) == NULL) {
493  fprintf(stderr, "%s: can't open %s for reading\n", progname, argv[file_index]);
495  }
496  } else {
497  /* default input file is stdin */
498  fp = read_stdin();
499  }
500 
501 #if TRANSFORMS_SUPPORTED
502  /* Open the drop file. */
503  if (dropfilename != NULL) {
505  fprintf(stderr, "%s: can't open %s for reading\n", progname, dropfilename);
507  }
508  dropinfo.err = jpeg_std_error(&jdroperr);
509  jpeg_create_decompress(&dropinfo);
510  jpeg_stdio_src(&dropinfo, drop_file);
511  } else {
512  drop_file = NULL;
513  }
514 #endif
515 
516 #ifdef PROGRESS_REPORT
517  start_progress_monitor((j_common_ptr) &dstinfo, &progress);
518 #endif
519 
520  /* Specify data source for decompression */
521  jpeg_stdio_src(&srcinfo, fp);
522 
523  /* Enable saving of extra markers that we want to copy */
524  jcopy_markers_setup(&srcinfo, copyoption);
525 
526  /* Read file header */
527  (void) jpeg_read_header(&srcinfo, TRUE);
528 
529  /* Adjust default decompression parameters */
530  if (scaleoption != NULL)
531  if (sscanf(scaleoption, "%u/%u",
532  &srcinfo.scale_num, &srcinfo.scale_denom) < 1)
533  usage();
534 
535 #if TRANSFORMS_SUPPORTED
536  if (dropfilename != NULL) {
537  (void) jpeg_read_header(&dropinfo, TRUE);
538  transformoption.crop_width = dropinfo.image_width;
540  transformoption.crop_height = dropinfo.image_height;
542  transformoption.drop_ptr = &dropinfo;
543  }
544 #endif
545 
546  /* Any space needed by a transform option must be requested before
547  * jpeg_read_coefficients so that memory allocation will be done right.
548  */
549 #if TRANSFORMS_SUPPORTED
550  /* Fail right away if -perfect is given and transformation is not perfect.
551  */
552  if (!jtransform_request_workspace(&srcinfo, &transformoption)) {
553  fprintf(stderr, "%s: transformation is not perfect\n", progname);
555  }
556 #endif
557 
558  /* Read source file as DCT coefficients */
559  src_coef_arrays = jpeg_read_coefficients(&srcinfo);
560 
561 #if TRANSFORMS_SUPPORTED
562  if (dropfilename != NULL) {
563  transformoption.drop_coef_arrays = jpeg_read_coefficients(&dropinfo);
564  }
565 #endif
566 
567  /* Initialize destination compression parameters from source values */
569 
570  /* Adjust destination parameters if required by transform options;
571  * also find out which set of coefficient arrays will hold the output.
572  */
573 #if TRANSFORMS_SUPPORTED
574  dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
575  src_coef_arrays,
576  &transformoption);
577 #else
578  dst_coef_arrays = src_coef_arrays;
579 #endif
580 
581  /* Close input file, if we opened it.
582  * Note: we assume that jpeg_read_coefficients consumed all input
583  * until JPEG_REACHED_EOI, and that jpeg_finish_decompress will
584  * only consume more while (! cinfo->inputctl->eoi_reached).
585  * We cannot call jpeg_finish_decompress here since we still need the
586  * virtual arrays allocated from the source object for processing.
587  */
588  if (fp != stdin)
589  fclose(fp);
590 
591  /* Open the output file. */
592  if (outfilename != NULL) {
593  if ((fp = fopen(outfilename, WRITE_BINARY)) == NULL) {
594  fprintf(stderr, "%s: can't open %s for writing\n", progname, outfilename);
596  }
597  } else {
598  /* default output file is stdout */
599  fp = write_stdout();
600  }
601 
602  /* Adjust default compression parameters by re-parsing the options */
603  file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
604 
605  /* Specify data destination for compression */
606  jpeg_stdio_dest(&dstinfo, fp);
607 
608  /* Start compressor (note no image data is actually written here) */
609  jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
610 
611  /* Copy to the output file any extra markers that we want to preserve */
613 
614  /* Execute image transformation, if any */
615 #if TRANSFORMS_SUPPORTED
616  jtransform_execute_transformation(&srcinfo, &dstinfo,
617  src_coef_arrays,
618  &transformoption);
619 #endif
620 
621  /* Finish compression and release memory */
624 #if TRANSFORMS_SUPPORTED
625  if (dropfilename != NULL) {
626  (void) jpeg_finish_decompress(&dropinfo);
627  jpeg_destroy_decompress(&dropinfo);
628  }
629 #endif
630  (void) jpeg_finish_decompress(&srcinfo);
631  jpeg_destroy_decompress(&srcinfo);
632 
633  /* Close output file, if we opened it */
634  if (fp != stdout)
635  fclose(fp);
636 #if TRANSFORMS_SUPPORTED
637  if (drop_file != NULL)
638  fclose(drop_file);
639 #endif
640 
641 #ifdef PROGRESS_REPORT
642  end_progress_monitor((j_common_ptr) &dstinfo);
643 #endif
644 
645  /* All done. */
646 #if TRANSFORMS_SUPPORTED
647  if (dropfilename != NULL)
648  exit(jsrcerr.num_warnings + jdroperr.num_warnings +
649  jdsterr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
650 #endif
651  exit(jsrcerr.num_warnings + jdsterr.num_warnings ?
653  return 0; /* suppress no-return-value warnings */
654 }
#define READ_BINARY
Definition: jmemdos.c:77
static int argc
Definition: ServiceArgs.c:12
jpeg_read_header(j_decompress_ptr cinfo, boolean require_image)
Definition: jdapimin.c:245
JDIMENSION crop_height
Definition: transupp.h:151
#define TRUE
Definition: types.h:120
struct png_info_def **typedef void(__cdecl typeof(png_destroy_read_struct))(struct png_struct_def **
Definition: typeof.h:49
jpeg_finish_compress(j_compress_ptr cinfo)
Definition: jcapimin.c:155
static const char * progname
Definition: jpegtran.c:38
jpeg_destroy_compress(j_compress_ptr cinfo)
Definition: jcapimin.c:96
JCROP_CODE crop_height_set
Definition: transupp.h:152
FILE * stdin
#define argv
Definition: mplay32.c:18
jpeg_stdio_dest(j_compress_ptr cinfo, FILE *outfile)
Definition: jdatadst.c:195
parse_switches(j_compress_ptr cinfo, int argc, char **argv, int last_file_arg_seen, boolean for_real)
Definition: jpegtran.c:124
static void drop_file(DOS_FS *fs, DOS_FILE *file)
Definition: check.c:388
FILE * stdout
read_stdin(void)
Definition: cdjpeg.c:149
#define EXIT_SUCCESS
Definition: rdjpgcom.c:55
#define jpeg_create_decompress(cinfo)
Definition: jpeglib.h:962
_Check_return_opt_ _CRTIMP int __cdecl fprintf(_Inout_ FILE *_File, _In_z_ _Printf_format_string_ const char *_Format,...)
jpeg_copy_critical_parameters(j_decompress_ptr srcinfo, j_compress_ptr dstinfo)
Definition: jctrans.c:64
jcopy_markers_execute(j_decompress_ptr srcinfo, j_compress_ptr dstinfo, JCOPY_OPTION option)
Definition: transupp.c:2392
#define EXIT_WARNING
Definition: cdjpeg.h:187
j_decompress_ptr drop_ptr
Definition: transupp.h:159
static char * dropfilename
Definition: jpegtran.c:40
smooth NULL
Definition: ftsmooth.c:416
_Check_return_ _CRTIMP int __cdecl sscanf(_In_z_ const char *_Src, _In_z_ _Scanf_format_string_ const char *_Format,...)
static char * scaleoption
Definition: jpegtran.c:41
jpeg_stdio_src(j_decompress_ptr cinfo, FILE *infile)
Definition: jdatasrc.c:212
#define EXIT_FAILURE
Definition: jerror.c:33
usage(void)
Definition: jpegtran.c:47
static char * outfilename
Definition: jpegtran.c:39
jvirt_barray_ptr * drop_coef_arrays
Definition: transupp.h:160
jpeg_finish_decompress(j_decompress_ptr cinfo)
Definition: jdapimin.c:373
JDIMENSION crop_width
Definition: transupp.h:149
j_compress_ptr dstinfo
Definition: jpeglib.h:1100
_Check_return_opt_ _CRTIMP int __cdecl fclose(_Inout_ FILE *_File)
_Check_return_ _CRTIMP FILE *__cdecl fopen(_In_z_ const char *_Filename, _In_z_ const char *_Mode)
jpeg_destroy_decompress(j_decompress_ptr cinfo)
Definition: jdapimin.c:92
#define WRITE_BINARY
Definition: wrjpgcom.c:47
jcopy_markers_setup(j_decompress_ptr srcinfo, JCOPY_OPTION option)
Definition: transupp.c:2367
static jpeg_transform_info transformoption
Definition: jpegtran.c:43
#define jpeg_create_compress(cinfo)
Definition: jpeglib.h:959
cd_progress_ptr progress
Definition: cdjpeg.h:152
write_stdout(void)
Definition: cdjpeg.c:167
jpeg_std_error(struct jpeg_error_mgr *err)
Definition: jerror.c:232
FILE * stderr
void exit(int exitcode)
Definition: _exit.c:33
JCROP_CODE crop_width_set
Definition: transupp.h:150
static JCOPY_OPTION copyoption
Definition: jpegtran.c:42

◆ parse_switches()

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

Definition at line 124 of file jpegtran.c.

134 {
135  int argn;
136  char * arg;
137  boolean simple_progressive;
138  char * scansarg = NULL; /* saves -scans parm if any */
139 
140  /* Set up default JPEG parameters. */
141  simple_progressive = FALSE;
142  outfilename = NULL;
143  scaleoption = NULL;
150  cinfo->err->trace_level = 0;
151 
152  /* Scan command line options, adjust parameters */
153 
154  for (argn = 1; argn < argc; argn++) {
155  arg = argv[argn];
156  if (*arg != '-') {
157  /* Not a switch, must be a file name argument */
158  if (argn <= last_file_arg_seen) {
159  outfilename = NULL; /* -outfile applies to just one input file */
160  continue; /* ignore this name if previously processed */
161  }
162  break; /* else done parsing switches */
163  }
164  arg++; /* advance past switch marker character */
165 
166  if (keymatch(arg, "arithmetic", 1)) {
167  /* Use arithmetic coding. */
168 #ifdef C_ARITH_CODING_SUPPORTED
169  cinfo->arith_code = TRUE;
170 #else
171  fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
172  progname);
174 #endif
175 
176  } else if (keymatch(arg, "copy", 2)) {
177  /* Select which extra markers to copy. */
178  if (++argn >= argc) /* advance to next argument */
179  usage();
180  if (keymatch(argv[argn], "none", 1)) {
182  } else if (keymatch(argv[argn], "comments", 1)) {
184  } else if (keymatch(argv[argn], "all", 1)) {
186  } else
187  usage();
188 
189  } else if (keymatch(arg, "crop", 2)) {
190  /* Perform lossless cropping. */
191 #if TRANSFORMS_SUPPORTED
192  if (++argn >= argc) /* advance to next argument */
193  usage();
194  if (transformoption.crop /* reject multiple crop/drop/wipe requests */ ||
195  ! jtransform_parse_crop_spec(&transformoption, argv[argn])) {
196  fprintf(stderr, "%s: bogus -crop argument '%s'\n",
197  progname, argv[argn]);
199  }
200 #else
201  select_transform(JXFORM_NONE); /* force an error */
202 #endif
203 
204  } else if (keymatch(arg, "drop", 2)) {
205 #if TRANSFORMS_SUPPORTED
206  if (++argn >= argc) /* advance to next argument */
207  usage();
208  if (transformoption.crop /* reject multiple crop/drop/wipe requests */ ||
209  ! jtransform_parse_crop_spec(&transformoption, argv[argn]) ||
212  fprintf(stderr, "%s: bogus -drop argument '%s'\n",
213  progname, argv[argn]);
215  }
216  if (++argn >= argc) /* advance to next argument */
217  usage();
218  dropfilename = argv[argn];
220 #else
221  select_transform(JXFORM_NONE); /* force an error */
222 #endif
223 
224  } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
225  /* Enable debug printouts. */
226  /* On first -d, print version identification */
227  static boolean printed_version = FALSE;
228 
229  if (! printed_version) {
230  fprintf(stderr, "Independent JPEG Group's JPEGTRAN, version %s\n%s\n",
232  printed_version = TRUE;
233  }
234  cinfo->err->trace_level++;
235 
236  } else if (keymatch(arg, "flip", 1)) {
237  /* Mirror left-right or top-bottom. */
238  if (++argn >= argc) /* advance to next argument */
239  usage();
240  if (keymatch(argv[argn], "horizontal", 1))
242  else if (keymatch(argv[argn], "vertical", 1))
244  else
245  usage();
246 
247  } else if (keymatch(arg, "grayscale", 1) || keymatch(arg, "greyscale",1)) {
248  /* Force to grayscale. */
249 #if TRANSFORMS_SUPPORTED
251 #else
252  select_transform(JXFORM_NONE); /* force an error */
253 #endif
254 
255  } else if (keymatch(arg, "maxmemory", 3)) {
256  /* Maximum memory in Kb (or Mb with 'm'). */
257  long lval;
258  char ch = 'x';
259 
260  if (++argn >= argc) /* advance to next argument */
261  usage();
262  if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
263  usage();
264  if (ch == 'm' || ch == 'M')
265  lval *= 1000L;
266  cinfo->mem->max_memory_to_use = lval * 1000L;
267 
268  } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
269  /* Enable entropy parm optimization. */
270 #ifdef ENTROPY_OPT_SUPPORTED
271  cinfo->optimize_coding = TRUE;
272 #else
273  fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
274  progname);
276 #endif
277 
278  } else if (keymatch(arg, "outfile", 4)) {
279  /* Set output file name. */
280  if (++argn >= argc) /* advance to next argument */
281  usage();
282  outfilename = argv[argn]; /* save it away for later use */
283 
284  } else if (keymatch(arg, "perfect", 2)) {
285  /* Fail if there is any partial edge MCUs that the transform can't
286  * handle. */
288 
289  } else if (keymatch(arg, "progressive", 2)) {
290  /* Select simple progressive mode. */
291 #ifdef C_PROGRESSIVE_SUPPORTED
292  simple_progressive = TRUE;
293  /* We must postpone execution until num_components is known. */
294 #else
295  fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
296  progname);
298 #endif
299 
300  } else if (keymatch(arg, "restart", 1)) {
301  /* Restart interval in MCU rows (or in MCUs with 'b'). */
302  long lval;
303  char ch = 'x';
304 
305  if (++argn >= argc) /* advance to next argument */
306  usage();
307  if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
308  usage();
309  if (lval < 0 || lval > 65535L)
310  usage();
311  if (ch == 'b' || ch == 'B') {
312  cinfo->restart_interval = (unsigned int) lval;
313  cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
314  } else {
315  cinfo->restart_in_rows = (int) lval;
316  /* restart_interval will be computed during startup */
317  }
318 
319  } else if (keymatch(arg, "rotate", 2)) {
320  /* Rotate 90, 180, or 270 degrees (measured clockwise). */
321  if (++argn >= argc) /* advance to next argument */
322  usage();
323  if (keymatch(argv[argn], "90", 2))
325  else if (keymatch(argv[argn], "180", 3))
327  else if (keymatch(argv[argn], "270", 3))
329  else
330  usage();
331 
332  } else if (keymatch(arg, "scale", 4)) {
333  /* Scale the output image by a fraction M/N. */
334  if (++argn >= argc) /* advance to next argument */
335  usage();
336  scaleoption = argv[argn];
337  /* We must postpone processing until decompression startup. */
338 
339  } else if (keymatch(arg, "scans", 1)) {
340  /* Set scan script. */
341 #ifdef C_MULTISCAN_FILES_SUPPORTED
342  if (++argn >= argc) /* advance to next argument */
343  usage();
344  scansarg = argv[argn];
345  /* We must postpone reading the file in case -progressive appears. */
346 #else
347  fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
348  progname);
350 #endif
351 
352  } else if (keymatch(arg, "transpose", 1)) {
353  /* Transpose (across UL-to-LR axis). */
355 
356  } else if (keymatch(arg, "transverse", 6)) {
357  /* Transverse transpose (across UR-to-LL axis). */
359 
360  } else if (keymatch(arg, "trim", 3)) {
361  /* Trim off any partial edge MCUs that the transform can't handle. */
363 
364  } else if (keymatch(arg, "wipe", 1)) {
365 #if TRANSFORMS_SUPPORTED
366  if (++argn >= argc) /* advance to next argument */
367  usage();
368  if (transformoption.crop /* reject multiple crop/drop/wipe requests */ ||
369  ! jtransform_parse_crop_spec(&transformoption, argv[argn])) {
370  fprintf(stderr, "%s: bogus -wipe argument '%s'\n",
371  progname, argv[argn]);
373  }
375 #else
376  select_transform(JXFORM_NONE); /* force an error */
377 #endif
378 
379  } else {
380  usage(); /* bogus switch */
381  }
382  }
383 
384  /* Post-switch-scanning cleanup */
385 
386  if (for_real) {
387 
388 #ifdef C_PROGRESSIVE_SUPPORTED
389  if (simple_progressive) /* process -progressive; -scans can override */
390  jpeg_simple_progression(cinfo);
391 #endif
392 
393 #ifdef C_MULTISCAN_FILES_SUPPORTED
394  if (scansarg != NULL) /* process -scans if it was present */
395  if (! read_scan_script(cinfo, scansarg))
396  usage();
397 #endif
398  }
399 
400  return argn; /* return index of next arg (file name) */
401 }
static int argc
Definition: ServiceArgs.c:12
#define TRUE
Definition: types.h:120
static const char * progname
Definition: jpegtran.c:38
JCROP_CODE crop_height_set
Definition: transupp.h:152
void * arg
Definition: msvc.h:10
#define argv
Definition: mplay32.c:18
select_transform(JXFORM_CODE transform)
Definition: jpegtran.c:101
_Check_return_opt_ _CRTIMP int __cdecl fprintf(_Inout_ FILE *_File, _In_z_ _Printf_format_string_ const char *_Format,...)
#define JCOPYRIGHT
Definition: jversion.h:14
static char * dropfilename
Definition: jpegtran.c:40
smooth NULL
Definition: ftsmooth.c:416
_Check_return_ _CRTIMP int __cdecl sscanf(_In_z_ const char *_Src, _In_z_ _Scanf_format_string_ const char *_Format,...)
boolean force_grayscale
Definition: transupp.h:143
keymatch(char *arg, const char *keyword, int minchars)
Definition: cdjpeg.c:122
JXFORM_CODE transform
Definition: transupp.h:140
static char * scaleoption
Definition: jpegtran.c:41
#define EXIT_FAILURE
Definition: jerror.c:33
usage(void)
Definition: jpegtran.c:47
static char * outfilename
Definition: jpegtran.c:39
unsigned int restart_interval
Definition: jpeglib.h:370
static const WCHAR L[]
Definition: oid.c:1250
boolean arith_code
Definition: jpeglib.h:358
#define JCOPYOPT_DEFAULT
Definition: transupp.h:222
static jpeg_transform_info transformoption
Definition: jpegtran.c:43
boolean optimize_coding
Definition: jpeglib.h:359
FILE * stderr
void exit(int exitcode)
Definition: _exit.c:33
JCROP_CODE crop_width_set
Definition: transupp.h:150
static JCOPY_OPTION copyoption
Definition: jpegtran.c:42
#define JVERSION
Definition: jversion.h:12
unsigned int(__cdecl typeof(jpeg_read_scanlines))(struct jpeg_decompress_struct *
Definition: typeof.h:31

Referenced by main().

◆ select_transform()

select_transform ( JXFORM_CODE  transform)

Definition at line 101 of file jpegtran.c.

105 {
106 #if TRANSFORMS_SUPPORTED
110  } else {
111  fprintf(stderr, "%s: can only do one image transformation at a time\n",
112  progname);
113  usage();
114  }
115 #else
116  fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
117  progname);
119 #endif
120 }
static const char * progname
Definition: jpegtran.c:38
_Check_return_opt_ _CRTIMP int __cdecl fprintf(_Inout_ FILE *_File, _In_z_ _Printf_format_string_ const char *_Format,...)
JXFORM_CODE transform
Definition: transupp.h:140
#define EXIT_FAILURE
Definition: jerror.c:33
usage(void)
Definition: jpegtran.c:47
static jpeg_transform_info transformoption
Definition: jpegtran.c:43
FILE * stderr
GLuint GLenum GLenum transform
Definition: glext.h:9407
void exit(int exitcode)
Definition: _exit.c:33

Referenced by parse_switches().

◆ usage()

usage ( void  )

Definition at line 47 of file jpegtran.c.

49 {
50  fprintf(stderr, "usage: %s [switches] ", progname);
51 #ifdef TWO_FILE_COMMANDLINE
52  fprintf(stderr, "inputfile outputfile\n");
53 #else
54  fprintf(stderr, "[inputfile]\n");
55 #endif
56 
57  fprintf(stderr, "Switches (names may be abbreviated):\n");
58  fprintf(stderr, " -copy none Copy no extra markers from source file\n");
59  fprintf(stderr, " -copy comments Copy only comment markers (default)\n");
60  fprintf(stderr, " -copy all Copy all extra markers\n");
61 #ifdef ENTROPY_OPT_SUPPORTED
62  fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n");
63 #endif
64 #ifdef C_PROGRESSIVE_SUPPORTED
65  fprintf(stderr, " -progressive Create progressive JPEG file\n");
66 #endif
67  fprintf(stderr, "Switches for modifying the image:\n");
68 #if TRANSFORMS_SUPPORTED
69  fprintf(stderr, " -crop WxH+X+Y Crop to a rectangular subarea\n");
70  fprintf(stderr, " -drop +X+Y filename Drop another image\n");
71  fprintf(stderr, " -flip [horizontal|vertical] Mirror image (left-right or top-bottom)\n");
72  fprintf(stderr, " -grayscale Reduce to grayscale (omit color data)\n");
73  fprintf(stderr, " -perfect Fail if there is non-transformable edge blocks\n");
74  fprintf(stderr, " -rotate [90|180|270] Rotate image (degrees clockwise)\n");
75 #endif
76  fprintf(stderr, " -scale M/N Scale output image by fraction M/N, eg, 1/8\n");
77 #if TRANSFORMS_SUPPORTED
78  fprintf(stderr, " -transpose Transpose image\n");
79  fprintf(stderr, " -transverse Transverse transpose image\n");
80  fprintf(stderr, " -trim Drop non-transformable edge blocks\n");
81  fprintf(stderr, " with -drop: Requantize drop file to source file\n");
82  fprintf(stderr, " -wipe WxH+X+Y Wipe (gray out) a rectangular subarea\n");
83 #endif
84  fprintf(stderr, "Switches for advanced users:\n");
85 #ifdef C_ARITH_CODING_SUPPORTED
86  fprintf(stderr, " -arithmetic Use arithmetic coding\n");
87 #endif
88  fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
89  fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
90  fprintf(stderr, " -outfile name Specify name for output file\n");
91  fprintf(stderr, " -verbose or -debug Emit debug output\n");
92  fprintf(stderr, "Switches for wizards:\n");
93 #ifdef C_MULTISCAN_FILES_SUPPORTED
94  fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n");
95 #endif
97 }
static const char * progname
Definition: jpegtran.c:38
_Check_return_opt_ _CRTIMP int __cdecl fprintf(_Inout_ FILE *_File, _In_z_ _Printf_format_string_ const char *_Format,...)
#define EXIT_FAILURE
Definition: jerror.c:33
FILE * stderr
void exit(int exitcode)
Definition: _exit.c:33

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

Variable Documentation

◆ copyoption

JCOPY_OPTION copyoption
static

Definition at line 42 of file jpegtran.c.

Referenced by main(), and parse_switches().

◆ dropfilename

char* dropfilename
static

Definition at line 40 of file jpegtran.c.

Referenced by main(), and parse_switches().

◆ outfilename

char* outfilename
static

Definition at line 39 of file jpegtran.c.

Referenced by main(), and parse_switches().

◆ progname

const char* progname
static

Definition at line 38 of file jpegtran.c.

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

◆ scaleoption

char* scaleoption
static

Definition at line 41 of file jpegtran.c.

Referenced by main(), and parse_switches().

◆ transformoption

jpeg_transform_info transformoption
static

Definition at line 43 of file jpegtran.c.

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