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diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jpegtran.c b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jpegtran.c
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1/*
2 * jpegtran.c
3 *
4 * Copyright (C) 1995-2011, Thomas G. Lane, Guido Vollbeding.
5 * This file is part of the Independent JPEG Group's software.
6 * For conditions of distribution and use, see the accompanying README file.
7 *
8 * This file contains a command-line user interface for JPEG transcoding.
9 * It is very similar to cjpeg.c, and partly to djpeg.c, but provides
10 * lossless transcoding between different JPEG file formats. It also
11 * provides some lossless and sort-of-lossless transformations of JPEG data.
12 */
13
14#include "cdjpeg.h" /* Common decls for cjpeg/djpeg applications */
15#include "transupp.h" /* Support routines for jpegtran */
16#include "jversion.h" /* for version message */
17
18#ifdef USE_CCOMMAND /* command-line reader for Macintosh */
19#ifdef __MWERKS__
20#include <SIOUX.h> /* Metrowerks needs this */
21#include <console.h> /* ... and this */
22#endif
23#ifdef THINK_C
24#include <console.h> /* Think declares it here */
25#endif
26#endif
27
28
29/*
30 * Argument-parsing code.
31 * The switch parser is designed to be useful with DOS-style command line
32 * syntax, ie, intermixed switches and file names, where only the switches
33 * to the left of a given file name affect processing of that file.
34 * The main program in this file doesn't actually use this capability...
35 */
36
37
38static const char * progname; /* program name for error messages */
39static char * outfilename; /* for -outfile switch */
40static char * scaleoption; /* -scale switch */
41static JCOPY_OPTION copyoption; /* -copy switch */
42static jpeg_transform_info transformoption; /* image transformation options */
43
44
45LOCAL(void)
46usage (void)
47/* complain about bad command line */
48{
49 fprintf(stderr, "usage: %s [switches] ", progname);
50#ifdef TWO_FILE_COMMANDLINE
51 fprintf(stderr, "inputfile outputfile\n");
52#else
53 fprintf(stderr, "[inputfile]\n");
54#endif
55
56 fprintf(stderr, "Switches (names may be abbreviated):\n");
57 fprintf(stderr, " -copy none Copy no extra markers from source file\n");
58 fprintf(stderr, " -copy comments Copy only comment markers (default)\n");
59 fprintf(stderr, " -copy all Copy all extra markers\n");
60#ifdef ENTROPY_OPT_SUPPORTED
61 fprintf(stderr, " -optimize Optimize Huffman table (smaller file, but slow compression)\n");
62#endif
63#ifdef C_PROGRESSIVE_SUPPORTED
64 fprintf(stderr, " -progressive Create progressive JPEG file\n");
65#endif
66 fprintf(stderr, "Switches for modifying the image:\n");
67#if TRANSFORMS_SUPPORTED
68 fprintf(stderr, " -crop WxH+X+Y Crop to a rectangular subarea\n");
69 fprintf(stderr, " -grayscale Reduce to grayscale (omit color data)\n");
70 fprintf(stderr, " -flip [horizontal|vertical] Mirror image (left-right or top-bottom)\n");
71 fprintf(stderr, " -perfect Fail if there is non-transformable edge blocks\n");
72 fprintf(stderr, " -rotate [90|180|270] Rotate image (degrees clockwise)\n");
73#endif
74 fprintf(stderr, " -scale M/N Scale output image by fraction M/N, eg, 1/8\n");
75#if TRANSFORMS_SUPPORTED
76 fprintf(stderr, " -transpose Transpose image\n");
77 fprintf(stderr, " -transverse Transverse transpose image\n");
78 fprintf(stderr, " -trim Drop non-transformable edge blocks\n");
79#endif
80 fprintf(stderr, "Switches for advanced users:\n");
81#ifdef C_ARITH_CODING_SUPPORTED
82 fprintf(stderr, " -arithmetic Use arithmetic coding\n");
83#endif
84 fprintf(stderr, " -restart N Set restart interval in rows, or in blocks with B\n");
85 fprintf(stderr, " -maxmemory N Maximum memory to use (in kbytes)\n");
86 fprintf(stderr, " -outfile name Specify name for output file\n");
87 fprintf(stderr, " -verbose or -debug Emit debug output\n");
88 fprintf(stderr, "Switches for wizards:\n");
89#ifdef C_MULTISCAN_FILES_SUPPORTED
90 fprintf(stderr, " -scans file Create multi-scan JPEG per script file\n");
91#endif
92 exit(EXIT_FAILURE);
93}
94
95
96LOCAL(void)
97select_transform (JXFORM_CODE transform)
98/* Silly little routine to detect multiple transform options,
99 * which we can't handle.
100 */
101{
102#if TRANSFORMS_SUPPORTED
103 if (transformoption.transform == JXFORM_NONE ||
104 transformoption.transform == transform) {
105 transformoption.transform = transform;
106 } else {
107 fprintf(stderr, "%s: can only do one image transformation at a time\n",
108 progname);
109 usage();
110 }
111#else
112 fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
113 progname);
114 exit(EXIT_FAILURE);
115#endif
116}
117
118
119LOCAL(int)
120parse_switches (j_compress_ptr cinfo, int argc, char **argv,
121 int last_file_arg_seen, boolean for_real)
122/* Parse optional switches.
123 * Returns argv[] index of first file-name argument (== argc if none).
124 * Any file names with indexes <= last_file_arg_seen are ignored;
125 * they have presumably been processed in a previous iteration.
126 * (Pass 0 for last_file_arg_seen on the first or only iteration.)
127 * for_real is FALSE on the first (dummy) pass; we may skip any expensive
128 * processing.
129 */
130{
131 int argn;
132 char * arg;
133 boolean simple_progressive;
134 char * scansarg = NULL; /* saves -scans parm if any */
135
136 /* Set up default JPEG parameters. */
137 simple_progressive = FALSE;
138 outfilename = NULL;
139 scaleoption = NULL;
140 copyoption = JCOPYOPT_DEFAULT;
141 transformoption.transform = JXFORM_NONE;
142 transformoption.perfect = FALSE;
143 transformoption.trim = FALSE;
144 transformoption.force_grayscale = FALSE;
145 transformoption.crop = FALSE;
146 cinfo->err->trace_level = 0;
147
148 /* Scan command line options, adjust parameters */
149
150 for (argn = 1; argn < argc; argn++) {
151 arg = argv[argn];
152 if (*arg != '-') {
153 /* Not a switch, must be a file name argument */
154 if (argn <= last_file_arg_seen) {
155 outfilename = NULL; /* -outfile applies to just one input file */
156 continue; /* ignore this name if previously processed */
157 }
158 break; /* else done parsing switches */
159 }
160 arg++; /* advance past switch marker character */
161
162 if (keymatch(arg, "arithmetic", 1)) {
163 /* Use arithmetic coding. */
164#ifdef C_ARITH_CODING_SUPPORTED
165 cinfo->arith_code = TRUE;
166#else
167 fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
168 progname);
169 exit(EXIT_FAILURE);
170#endif
171
172 } else if (keymatch(arg, "copy", 2)) {
173 /* Select which extra markers to copy. */
174 if (++argn >= argc) /* advance to next argument */
175 usage();
176 if (keymatch(argv[argn], "none", 1)) {
177 copyoption = JCOPYOPT_NONE;
178 } else if (keymatch(argv[argn], "comments", 1)) {
179 copyoption = JCOPYOPT_COMMENTS;
180 } else if (keymatch(argv[argn], "all", 1)) {
181 copyoption = JCOPYOPT_ALL;
182 } else
183 usage();
184
185 } else if (keymatch(arg, "crop", 2)) {
186 /* Perform lossless cropping. */
187#if TRANSFORMS_SUPPORTED
188 if (++argn >= argc) /* advance to next argument */
189 usage();
190 if (! jtransform_parse_crop_spec(&transformoption, argv[argn])) {
191 fprintf(stderr, "%s: bogus -crop argument '%s'\n",
192 progname, argv[argn]);
193 exit(EXIT_FAILURE);
194 }
195#else
196 select_transform(JXFORM_NONE); /* force an error */
197#endif
198
199 } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
200 /* Enable debug printouts. */
201 /* On first -d, print version identification */
202 static boolean printed_version = FALSE;
203
204 if (! printed_version) {
205 fprintf(stderr, "Independent JPEG Group's JPEGTRAN, version %s\n%s\n",
206 JVERSION, JCOPYRIGHT);
207 printed_version = TRUE;
208 }
209 cinfo->err->trace_level++;
210
211 } else if (keymatch(arg, "flip", 1)) {
212 /* Mirror left-right or top-bottom. */
213 if (++argn >= argc) /* advance to next argument */
214 usage();
215 if (keymatch(argv[argn], "horizontal", 1))
216 select_transform(JXFORM_FLIP_H);
217 else if (keymatch(argv[argn], "vertical", 1))
218 select_transform(JXFORM_FLIP_V);
219 else
220 usage();
221
222 } else if (keymatch(arg, "grayscale", 1) || keymatch(arg, "greyscale",1)) {
223 /* Force to grayscale. */
224#if TRANSFORMS_SUPPORTED
225 transformoption.force_grayscale = TRUE;
226#else
227 select_transform(JXFORM_NONE); /* force an error */
228#endif
229
230 } else if (keymatch(arg, "maxmemory", 3)) {
231 /* Maximum memory in Kb (or Mb with 'm'). */
232 long lval;
233 char ch = 'x';
234
235 if (++argn >= argc) /* advance to next argument */
236 usage();
237 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
238 usage();
239 if (ch == 'm' || ch == 'M')
240 lval *= 1000L;
241 cinfo->mem->max_memory_to_use = lval * 1000L;
242
243 } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
244 /* Enable entropy parm optimization. */
245#ifdef ENTROPY_OPT_SUPPORTED
246 cinfo->optimize_coding = TRUE;
247#else
248 fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
249 progname);
250 exit(EXIT_FAILURE);
251#endif
252
253 } else if (keymatch(arg, "outfile", 4)) {
254 /* Set output file name. */
255 if (++argn >= argc) /* advance to next argument */
256 usage();
257 outfilename = argv[argn]; /* save it away for later use */
258
259 } else if (keymatch(arg, "perfect", 2)) {
260 /* Fail if there is any partial edge MCUs that the transform can't
261 * handle. */
262 transformoption.perfect = TRUE;
263
264 } else if (keymatch(arg, "progressive", 2)) {
265 /* Select simple progressive mode. */
266#ifdef C_PROGRESSIVE_SUPPORTED
267 simple_progressive = TRUE;
268 /* We must postpone execution until num_components is known. */
269#else
270 fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
271 progname);
272 exit(EXIT_FAILURE);
273#endif
274
275 } else if (keymatch(arg, "restart", 1)) {
276 /* Restart interval in MCU rows (or in MCUs with 'b'). */
277 long lval;
278 char ch = 'x';
279
280 if (++argn >= argc) /* advance to next argument */
281 usage();
282 if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
283 usage();
284 if (lval < 0 || lval > 65535L)
285 usage();
286 if (ch == 'b' || ch == 'B') {
287 cinfo->restart_interval = (unsigned int) lval;
288 cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
289 } else {
290 cinfo->restart_in_rows = (int) lval;
291 /* restart_interval will be computed during startup */
292 }
293
294 } else if (keymatch(arg, "rotate", 2)) {
295 /* Rotate 90, 180, or 270 degrees (measured clockwise). */
296 if (++argn >= argc) /* advance to next argument */
297 usage();
298 if (keymatch(argv[argn], "90", 2))
299 select_transform(JXFORM_ROT_90);
300 else if (keymatch(argv[argn], "180", 3))
301 select_transform(JXFORM_ROT_180);
302 else if (keymatch(argv[argn], "270", 3))
303 select_transform(JXFORM_ROT_270);
304 else
305 usage();
306
307 } else if (keymatch(arg, "scale", 4)) {
308 /* Scale the output image by a fraction M/N. */
309 if (++argn >= argc) /* advance to next argument */
310 usage();
311 scaleoption = argv[argn];
312 /* We must postpone processing until decompression startup. */
313
314 } else if (keymatch(arg, "scans", 1)) {
315 /* Set scan script. */
316#ifdef C_MULTISCAN_FILES_SUPPORTED
317 if (++argn >= argc) /* advance to next argument */
318 usage();
319 scansarg = argv[argn];
320 /* We must postpone reading the file in case -progressive appears. */
321#else
322 fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
323 progname);
324 exit(EXIT_FAILURE);
325#endif
326
327 } else if (keymatch(arg, "transpose", 1)) {
328 /* Transpose (across UL-to-LR axis). */
329 select_transform(JXFORM_TRANSPOSE);
330
331 } else if (keymatch(arg, "transverse", 6)) {
332 /* Transverse transpose (across UR-to-LL axis). */
333 select_transform(JXFORM_TRANSVERSE);
334
335 } else if (keymatch(arg, "trim", 3)) {
336 /* Trim off any partial edge MCUs that the transform can't handle. */
337 transformoption.trim = TRUE;
338
339 } else {
340 usage(); /* bogus switch */
341 }
342 }
343
344 /* Post-switch-scanning cleanup */
345
346 if (for_real) {
347
348#ifdef C_PROGRESSIVE_SUPPORTED
349 if (simple_progressive) /* process -progressive; -scans can override */
350 jpeg_simple_progression(cinfo);
351#endif
352
353#ifdef C_MULTISCAN_FILES_SUPPORTED
354 if (scansarg != NULL) /* process -scans if it was present */
355 if (! read_scan_script(cinfo, scansarg))
356 usage();
357#endif
358 }
359
360 return argn; /* return index of next arg (file name) */
361}
362
363
364/*
365 * The main program.
366 */
367
368int
369main (int argc, char **argv)
370{
371 struct jpeg_decompress_struct srcinfo;
372 struct jpeg_compress_struct dstinfo;
373 struct jpeg_error_mgr jsrcerr, jdsterr;
374#ifdef PROGRESS_REPORT
375 struct cdjpeg_progress_mgr progress;
376#endif
377 jvirt_barray_ptr * src_coef_arrays;
378 jvirt_barray_ptr * dst_coef_arrays;
379 int file_index;
380 /* We assume all-in-memory processing and can therefore use only a
381 * single file pointer for sequential input and output operation.
382 */
383 FILE * fp;
384
385 /* On Mac, fetch a command line. */
386#ifdef USE_CCOMMAND
387 argc = ccommand(&argv);
388#endif
389
390 progname = argv[0];
391 if (progname == NULL || progname[0] == 0)
392 progname = "jpegtran"; /* in case C library doesn't provide it */
393
394 /* Initialize the JPEG decompression object with default error handling. */
395 srcinfo.err = jpeg_std_error(&jsrcerr);
396 jpeg_create_decompress(&srcinfo);
397 /* Initialize the JPEG compression object with default error handling. */
398 dstinfo.err = jpeg_std_error(&jdsterr);
399 jpeg_create_compress(&dstinfo);
400
401 /* Now safe to enable signal catcher.
402 * Note: we assume only the decompression object will have virtual arrays.
403 */
404#ifdef NEED_SIGNAL_CATCHER
405 enable_signal_catcher((j_common_ptr) &srcinfo);
406#endif
407
408 /* Scan command line to find file names.
409 * It is convenient to use just one switch-parsing routine, but the switch
410 * values read here are mostly ignored; we will rescan the switches after
411 * opening the input file. Also note that most of the switches affect the
412 * destination JPEG object, so we parse into that and then copy over what
413 * needs to affects the source too.
414 */
415
416 file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
417 jsrcerr.trace_level = jdsterr.trace_level;
418 srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
419
420#ifdef TWO_FILE_COMMANDLINE
421 /* Must have either -outfile switch or explicit output file name */
422 if (outfilename == NULL) {
423 if (file_index != argc-2) {
424 fprintf(stderr, "%s: must name one input and one output file\n",
425 progname);
426 usage();
427 }
428 outfilename = argv[file_index+1];
429 } else {
430 if (file_index != argc-1) {
431 fprintf(stderr, "%s: must name one input and one output file\n",
432 progname);
433 usage();
434 }
435 }
436#else
437 /* Unix style: expect zero or one file name */
438 if (file_index < argc-1) {
439 fprintf(stderr, "%s: only one input file\n", progname);
440 usage();
441 }
442#endif /* TWO_FILE_COMMANDLINE */
443
444 /* Open the input file. */
445 if (file_index < argc) {
446 if ((fp = fopen(argv[file_index], READ_BINARY)) == NULL) {
447 fprintf(stderr, "%s: can't open %s for reading\n", progname, argv[file_index]);
448 exit(EXIT_FAILURE);
449 }
450 } else {
451 /* default input file is stdin */
452 fp = read_stdin();
453 }
454
455#ifdef PROGRESS_REPORT
456 start_progress_monitor((j_common_ptr) &dstinfo, &progress);
457#endif
458
459 /* Specify data source for decompression */
460 jpeg_stdio_src(&srcinfo, fp);
461
462 /* Enable saving of extra markers that we want to copy */
463 jcopy_markers_setup(&srcinfo, copyoption);
464
465 /* Read file header */
466 (void) jpeg_read_header(&srcinfo, TRUE);
467
468 /* Adjust default decompression parameters */
469 if (scaleoption != NULL)
470 if (sscanf(scaleoption, "%d/%d",
471 &srcinfo.scale_num, &srcinfo.scale_denom) < 1)
472 usage();
473
474 /* Any space needed by a transform option must be requested before
475 * jpeg_read_coefficients so that memory allocation will be done right.
476 */
477#if TRANSFORMS_SUPPORTED
478 /* Fail right away if -perfect is given and transformation is not perfect.
479 */
480 if (!jtransform_request_workspace(&srcinfo, &transformoption)) {
481 fprintf(stderr, "%s: transformation is not perfect\n", progname);
482 exit(EXIT_FAILURE);
483 }
484#endif
485
486 /* Read source file as DCT coefficients */
487 src_coef_arrays = jpeg_read_coefficients(&srcinfo);
488
489 /* Initialize destination compression parameters from source values */
490 jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
491
492 /* Adjust destination parameters if required by transform options;
493 * also find out which set of coefficient arrays will hold the output.
494 */
495#if TRANSFORMS_SUPPORTED
496 dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
497 src_coef_arrays,
498 &transformoption);
499#else
500 dst_coef_arrays = src_coef_arrays;
501#endif
502
503 /* Close input file, if we opened it.
504 * Note: we assume that jpeg_read_coefficients consumed all input
505 * until JPEG_REACHED_EOI, and that jpeg_finish_decompress will
506 * only consume more while (! cinfo->inputctl->eoi_reached).
507 * We cannot call jpeg_finish_decompress here since we still need the
508 * virtual arrays allocated from the source object for processing.
509 */
510 if (fp != stdin)
511 fclose(fp);
512
513 /* Open the output file. */
514 if (outfilename != NULL) {
515 if ((fp = fopen(outfilename, WRITE_BINARY)) == NULL) {
516 fprintf(stderr, "%s: can't open %s for writing\n", progname, outfilename);
517 exit(EXIT_FAILURE);
518 }
519 } else {
520 /* default output file is stdout */
521 fp = write_stdout();
522 }
523
524 /* Adjust default compression parameters by re-parsing the options */
525 file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
526
527 /* Specify data destination for compression */
528 jpeg_stdio_dest(&dstinfo, fp);
529
530 /* Start compressor (note no image data is actually written here) */
531 jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
532
533 /* Copy to the output file any extra markers that we want to preserve */
534 jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
535
536 /* Execute image transformation, if any */
537#if TRANSFORMS_SUPPORTED
538 jtransform_execute_transformation(&srcinfo, &dstinfo,
539 src_coef_arrays,
540 &transformoption);
541#endif
542
543 /* Finish compression and release memory */
544 jpeg_finish_compress(&dstinfo);
545 jpeg_destroy_compress(&dstinfo);
546 (void) jpeg_finish_decompress(&srcinfo);
547 jpeg_destroy_decompress(&srcinfo);
548
549 /* Close output file, if we opened it */
550 if (fp != stdout)
551 fclose(fp);
552
553#ifdef PROGRESS_REPORT
554 end_progress_monitor((j_common_ptr) &dstinfo);
555#endif
556
557 /* All done. */
558 exit(jsrcerr.num_warnings + jdsterr.num_warnings ?EXIT_WARNING:EXIT_SUCCESS);
559 return 0; /* suppress no-return-value warnings */
560}
generated by cgit v1.1 at 2024-11-19 19:19:40 +0000