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[reactos.git] / reactos / dll / 3rdparty / libpng / pngtest.c
1
2 /* pngtest.c - a simple test program to test libpng
3 *
4 * Last changed in libpng 1.5.0 [January 6, 2011]
5 * Copyright (c) 1998-2011 Glenn Randers-Pehrson
6 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
7 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
8 *
9 * This code is released under the libpng license.
10 * For conditions of distribution and use, see the disclaimer
11 * and license in png.h
12 *
13 * This program reads in a PNG image, writes it out again, and then
14 * compares the two files. If the files are identical, this shows that
15 * the basic chunk handling, filtering, and (de)compression code is working
16 * properly. It does not currently test all of the transforms, although
17 * it probably should.
18 *
19 * The program will report "FAIL" in certain legitimate cases:
20 * 1) when the compression level or filter selection method is changed.
21 * 2) when the maximum IDAT size (PNG_ZBUF_SIZE in pngconf.h) is not 8192.
22 * 3) unknown unsafe-to-copy ancillary chunks or unknown critical chunks
23 * exist in the input file.
24 * 4) others not listed here...
25 * In these cases, it is best to check with another tool such as "pngcheck"
26 * to see what the differences between the two files are.
27 *
28 * If a filename is given on the command-line, then this file is used
29 * for the input, rather than the default "pngtest.png". This allows
30 * testing a wide variety of files easily. You can also test a number
31 * of files at once by typing "pngtest -m file1.png file2.png ..."
32 */
33
34 #include "zlib.h"
35 #include "png.h"
36 /* Copied from pngpriv.h but only used in error messages below. */
37 #ifndef PNG_ZBUF_SIZE
38 # define PNG_ZBUF_SIZE 8192
39 #endif
40 # include <stdio.h>
41 # include <stdlib.h>
42 # include <string.h>
43 # define FCLOSE(file) fclose(file)
44
45 #ifndef PNG_STDIO_SUPPORTED
46 typedef FILE * png_FILE_p;
47 #endif
48
49 /* Makes pngtest verbose so we can find problems. */
50 #ifndef PNG_DEBUG
51 # define PNG_DEBUG 0
52 #endif
53
54 #if PNG_DEBUG > 1
55 # define pngtest_debug(m) ((void)fprintf(stderr, m "\n"))
56 # define pngtest_debug1(m,p1) ((void)fprintf(stderr, m "\n", p1))
57 # define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2))
58 #else
59 # define pngtest_debug(m) ((void)0)
60 # define pngtest_debug1(m,p1) ((void)0)
61 # define pngtest_debug2(m,p1,p2) ((void)0)
62 #endif
63
64 #if !PNG_DEBUG
65 # define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */
66 #endif
67
68 /* The code uses memcmp and memcpy on large objects (typically row pointers) so
69 * it is necessary to do soemthing special on certain architectures, note that
70 * the actual support for this was effectively removed in 1.4, so only the
71 * memory remains in this program:
72 */
73 #define CVT_PTR(ptr) (ptr)
74 #define CVT_PTR_NOCHECK(ptr) (ptr)
75 #define png_memcmp memcmp
76 #define png_memcpy memcpy
77 #define png_memset memset
78
79 /* Turn on CPU timing
80 #define PNGTEST_TIMING
81 */
82
83 #ifndef PNG_FLOATING_POINT_SUPPORTED
84 #undef PNGTEST_TIMING
85 #endif
86
87 #ifdef PNGTEST_TIMING
88 static float t_start, t_stop, t_decode, t_encode, t_misc;
89 #include <time.h>
90 #endif
91
92 #ifdef PNG_TIME_RFC1123_SUPPORTED
93 #define PNG_tIME_STRING_LENGTH 29
94 static int tIME_chunk_present = 0;
95 static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present";
96 #endif
97
98 static int verbose = 0;
99
100 int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname));
101
102 #ifdef __TURBOC__
103 #include <mem.h>
104 #endif
105
106 /* Defined so I can write to a file on gui/windowing platforms */
107 /* #define STDERR stderr */
108 #define STDERR stdout /* For DOS */
109
110 /* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
111 #ifndef png_jmpbuf
112 # define png_jmpbuf(png_ptr) png_ptr->jmpbuf
113 #endif
114
115 /* Example of using row callbacks to make a simple progress meter */
116 static int status_pass = 1;
117 static int status_dots_requested = 0;
118 static int status_dots = 1;
119
120 void PNGCBAPI
121 read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
122 void PNGCBAPI
123 read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
124 {
125 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX)
126 return;
127
128 if (status_pass != pass)
129 {
130 fprintf(stdout, "\n Pass %d: ", pass);
131 status_pass = pass;
132 status_dots = 31;
133 }
134
135 status_dots--;
136
137 if (status_dots == 0)
138 {
139 fprintf(stdout, "\n ");
140 status_dots=30;
141 }
142
143 fprintf(stdout, "r");
144 }
145
146 void PNGCBAPI
147 write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
148 void PNGCBAPI
149 write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
150 {
151 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7)
152 return;
153
154 fprintf(stdout, "w");
155 }
156
157
158 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
159 /* Example of using user transform callback (we don't transform anything,
160 * but merely examine the row filters. We set this to 256 rather than
161 * 5 in case illegal filter values are present.)
162 */
163 static png_uint_32 filters_used[256];
164 void PNGCBAPI
165 count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data);
166 void PNGCBAPI
167 count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data)
168 {
169 if (png_ptr != NULL && row_info != NULL)
170 ++filters_used[*(data - 1)];
171 }
172 #endif
173
174 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
175 /* Example of using user transform callback (we don't transform anything,
176 * but merely count the zero samples)
177 */
178
179 static png_uint_32 zero_samples;
180
181 void PNGCBAPI
182 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data);
183 void PNGCBAPI
184 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
185 {
186 png_bytep dp = data;
187 if (png_ptr == NULL)
188 return;
189
190 /* Contents of row_info:
191 * png_uint_32 width width of row
192 * png_uint_32 rowbytes number of bytes in row
193 * png_byte color_type color type of pixels
194 * png_byte bit_depth bit depth of samples
195 * png_byte channels number of channels (1-4)
196 * png_byte pixel_depth bits per pixel (depth*channels)
197 */
198
199 /* Counts the number of zero samples (or zero pixels if color_type is 3 */
200
201 if (row_info->color_type == 0 || row_info->color_type == 3)
202 {
203 int pos = 0;
204 png_uint_32 n, nstop;
205
206 for (n = 0, nstop=row_info->width; n<nstop; n++)
207 {
208 if (row_info->bit_depth == 1)
209 {
210 if (((*dp << pos++ ) & 0x80) == 0)
211 zero_samples++;
212
213 if (pos == 8)
214 {
215 pos = 0;
216 dp++;
217 }
218 }
219
220 if (row_info->bit_depth == 2)
221 {
222 if (((*dp << (pos+=2)) & 0xc0) == 0)
223 zero_samples++;
224
225 if (pos == 8)
226 {
227 pos = 0;
228 dp++;
229 }
230 }
231
232 if (row_info->bit_depth == 4)
233 {
234 if (((*dp << (pos+=4)) & 0xf0) == 0)
235 zero_samples++;
236
237 if (pos == 8)
238 {
239 pos = 0;
240 dp++;
241 }
242 }
243
244 if (row_info->bit_depth == 8)
245 if (*dp++ == 0)
246 zero_samples++;
247
248 if (row_info->bit_depth == 16)
249 {
250 if ((*dp | *(dp+1)) == 0)
251 zero_samples++;
252 dp+=2;
253 }
254 }
255 }
256 else /* Other color types */
257 {
258 png_uint_32 n, nstop;
259 int channel;
260 int color_channels = row_info->channels;
261 if (row_info->color_type > 3)color_channels--;
262
263 for (n = 0, nstop=row_info->width; n<nstop; n++)
264 {
265 for (channel = 0; channel < color_channels; channel++)
266 {
267 if (row_info->bit_depth == 8)
268 if (*dp++ == 0)
269 zero_samples++;
270
271 if (row_info->bit_depth == 16)
272 {
273 if ((*dp | *(dp+1)) == 0)
274 zero_samples++;
275
276 dp+=2;
277 }
278 }
279 if (row_info->color_type > 3)
280 {
281 dp++;
282 if (row_info->bit_depth == 16)
283 dp++;
284 }
285 }
286 }
287 }
288 #endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */
289
290 static int wrote_question = 0;
291
292 #ifndef PNG_STDIO_SUPPORTED
293 /* START of code to validate stdio-free compilation */
294 /* These copies of the default read/write functions come from pngrio.c and
295 * pngwio.c. They allow "don't include stdio" testing of the library.
296 * This is the function that does the actual reading of data. If you are
297 * not reading from a standard C stream, you should create a replacement
298 * read_data function and use it at run time with png_set_read_fn(), rather
299 * than changing the library.
300 */
301
302 #ifdef PNG_IO_STATE_SUPPORTED
303 void
304 pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
305 png_uint_32 io_op);
306 void
307 pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
308 png_uint_32 io_op)
309 {
310 png_uint_32 io_state = png_get_io_state(png_ptr);
311 int err = 0;
312
313 /* Check if the current operation (reading / writing) is as expected. */
314 if ((io_state & PNG_IO_MASK_OP) != io_op)
315 png_error(png_ptr, "Incorrect operation in I/O state");
316
317 /* Check if the buffer size specific to the current location
318 * (file signature / header / data / crc) is as expected.
319 */
320 switch (io_state & PNG_IO_MASK_LOC)
321 {
322 case PNG_IO_SIGNATURE:
323 if (data_length > 8)
324 err = 1;
325 break;
326 case PNG_IO_CHUNK_HDR:
327 if (data_length != 8)
328 err = 1;
329 break;
330 case PNG_IO_CHUNK_DATA:
331 break; /* no restrictions here */
332 case PNG_IO_CHUNK_CRC:
333 if (data_length != 4)
334 err = 1;
335 break;
336 default:
337 err = 1; /* uninitialized */
338 }
339 if (err)
340 png_error(png_ptr, "Bad I/O state or buffer size");
341 }
342 #endif
343
344 #ifndef USE_FAR_KEYWORD
345 static void PNGCBAPI
346 pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
347 {
348 png_size_t check = 0;
349 png_voidp io_ptr;
350
351 /* fread() returns 0 on error, so it is OK to store this in a png_size_t
352 * instead of an int, which is what fread() actually returns.
353 */
354 io_ptr = png_get_io_ptr(png_ptr);
355 if (io_ptr != NULL)
356 {
357 check = fread(data, 1, length, (png_FILE_p)io_ptr);
358 }
359
360 if (check != length)
361 {
362 png_error(png_ptr, "Read Error");
363 }
364
365 #ifdef PNG_IO_STATE_SUPPORTED
366 pngtest_check_io_state(png_ptr, length, PNG_IO_READING);
367 #endif
368 }
369 #else
370 /* This is the model-independent version. Since the standard I/O library
371 can't handle far buffers in the medium and small models, we have to copy
372 the data.
373 */
374
375 #define NEAR_BUF_SIZE 1024
376 #define MIN(a,b) (a <= b ? a : b)
377
378 static void PNGCBAPI
379 pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
380 {
381 png_size_t check;
382 png_byte *n_data;
383 png_FILE_p io_ptr;
384
385 /* Check if data really is near. If so, use usual code. */
386 n_data = (png_byte *)CVT_PTR_NOCHECK(data);
387 io_ptr = (png_FILE_p)CVT_PTR(png_get_io_ptr(png_ptr));
388 if ((png_bytep)n_data == data)
389 {
390 check = fread(n_data, 1, length, io_ptr);
391 }
392 else
393 {
394 png_byte buf[NEAR_BUF_SIZE];
395 png_size_t read, remaining, err;
396 check = 0;
397 remaining = length;
398
399 do
400 {
401 read = MIN(NEAR_BUF_SIZE, remaining);
402 err = fread(buf, 1, 1, io_ptr);
403 png_memcpy(data, buf, read); /* Copy far buffer to near buffer */
404 if (err != read)
405 break;
406 else
407 check += err;
408 data += read;
409 remaining -= read;
410 }
411 while (remaining != 0);
412 }
413
414 if (check != length)
415 png_error(png_ptr, "Read Error");
416
417 #ifdef PNG_IO_STATE_SUPPORTED
418 pngtest_check_io_state(png_ptr, length, PNG_IO_READING);
419 #endif
420 }
421 #endif /* USE_FAR_KEYWORD */
422
423 #ifdef PNG_WRITE_FLUSH_SUPPORTED
424 static void PNGCBAPI
425 pngtest_flush(png_structp png_ptr)
426 {
427 /* Do nothing; fflush() is said to be just a waste of energy. */
428 PNG_UNUSED(png_ptr) /* Stifle compiler warning */
429 }
430 #endif
431
432 /* This is the function that does the actual writing of data. If you are
433 * not writing to a standard C stream, you should create a replacement
434 * write_data function and use it at run time with png_set_write_fn(), rather
435 * than changing the library.
436 */
437 #ifndef USE_FAR_KEYWORD
438 static void PNGCBAPI
439 pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
440 {
441 png_size_t check;
442
443 check = fwrite(data, 1, length, (png_FILE_p)png_get_io_ptr(png_ptr));
444
445 if (check != length)
446 {
447 png_error(png_ptr, "Write Error");
448 }
449
450 #ifdef PNG_IO_STATE_SUPPORTED
451 pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING);
452 #endif
453 }
454 #else
455 /* This is the model-independent version. Since the standard I/O library
456 can't handle far buffers in the medium and small models, we have to copy
457 the data.
458 */
459
460 #define NEAR_BUF_SIZE 1024
461 #define MIN(a,b) (a <= b ? a : b)
462
463 static void PNGCBAPI
464 pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
465 {
466 png_size_t check;
467 png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
468 png_FILE_p io_ptr;
469
470 /* Check if data really is near. If so, use usual code. */
471 near_data = (png_byte *)CVT_PTR_NOCHECK(data);
472 io_ptr = (png_FILE_p)CVT_PTR(png_get_io_ptr(png_ptr));
473
474 if ((png_bytep)near_data == data)
475 {
476 check = fwrite(near_data, 1, length, io_ptr);
477 }
478
479 else
480 {
481 png_byte buf[NEAR_BUF_SIZE];
482 png_size_t written, remaining, err;
483 check = 0;
484 remaining = length;
485
486 do
487 {
488 written = MIN(NEAR_BUF_SIZE, remaining);
489 png_memcpy(buf, data, written); /* Copy far buffer to near buffer */
490 err = fwrite(buf, 1, written, io_ptr);
491 if (err != written)
492 break;
493 else
494 check += err;
495 data += written;
496 remaining -= written;
497 }
498 while (remaining != 0);
499 }
500
501 if (check != length)
502 {
503 png_error(png_ptr, "Write Error");
504 }
505
506 #ifdef PNG_IO_STATE_SUPPORTED
507 pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING);
508 #endif
509 }
510 #endif /* USE_FAR_KEYWORD */
511
512 /* This function is called when there is a warning, but the library thinks
513 * it can continue anyway. Replacement functions don't have to do anything
514 * here if you don't want to. In the default configuration, png_ptr is
515 * not used, but it is passed in case it may be useful.
516 */
517 static void PNGCBAPI
518 pngtest_warning(png_structp png_ptr, png_const_charp message)
519 {
520 PNG_CONST char *name = "UNKNOWN (ERROR!)";
521 char *test;
522 test = png_get_error_ptr(png_ptr);
523
524 if (test == NULL)
525 fprintf(STDERR, "%s: libpng warning: %s\n", name, message);
526
527 else
528 fprintf(STDERR, "%s: libpng warning: %s\n", test, message);
529 }
530
531 /* This is the default error handling function. Note that replacements for
532 * this function MUST NOT RETURN, or the program will likely crash. This
533 * function is used by default, or if the program supplies NULL for the
534 * error function pointer in png_set_error_fn().
535 */
536 static void PNGCBAPI
537 pngtest_error(png_structp png_ptr, png_const_charp message)
538 {
539 pngtest_warning(png_ptr, message);
540 /* We can return because png_error calls the default handler, which is
541 * actually OK in this case.
542 */
543 }
544 #endif /* !PNG_STDIO_SUPPORTED */
545 /* END of code to validate stdio-free compilation */
546
547 /* START of code to validate memory allocation and deallocation */
548 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
549
550 /* Allocate memory. For reasonable files, size should never exceed
551 * 64K. However, zlib may allocate more then 64K if you don't tell
552 * it not to. See zconf.h and png.h for more information. zlib does
553 * need to allocate exactly 64K, so whatever you call here must
554 * have the ability to do that.
555 *
556 * This piece of code can be compiled to validate max 64K allocations
557 * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K.
558 */
559 typedef struct memory_information
560 {
561 png_alloc_size_t size;
562 png_voidp pointer;
563 struct memory_information FAR *next;
564 } memory_information;
565 typedef memory_information FAR *memory_infop;
566
567 static memory_infop pinformation = NULL;
568 static int current_allocation = 0;
569 static int maximum_allocation = 0;
570 static int total_allocation = 0;
571 static int num_allocations = 0;
572
573 png_voidp PNGCBAPI png_debug_malloc PNGARG((png_structp png_ptr,
574 png_alloc_size_t size));
575 void PNGCBAPI png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr));
576
577 png_voidp
578 PNGCBAPI png_debug_malloc(png_structp png_ptr, png_alloc_size_t size)
579 {
580
581 /* png_malloc has already tested for NULL; png_create_struct calls
582 * png_debug_malloc directly, with png_ptr == NULL which is OK
583 */
584
585 if (size == 0)
586 return (NULL);
587
588 /* This calls the library allocator twice, once to get the requested
589 buffer and once to get a new free list entry. */
590 {
591 /* Disable malloc_fn and free_fn */
592 memory_infop pinfo;
593 png_set_mem_fn(png_ptr, NULL, NULL, NULL);
594 pinfo = (memory_infop)png_malloc(png_ptr,
595 png_sizeof(*pinfo));
596 pinfo->size = size;
597 current_allocation += size;
598 total_allocation += size;
599 num_allocations ++;
600
601 if (current_allocation > maximum_allocation)
602 maximum_allocation = current_allocation;
603
604 pinfo->pointer = png_malloc(png_ptr, size);
605 /* Restore malloc_fn and free_fn */
606
607 png_set_mem_fn(png_ptr,
608 NULL, png_debug_malloc, png_debug_free);
609
610 if (size != 0 && pinfo->pointer == NULL)
611 {
612 current_allocation -= size;
613 total_allocation -= size;
614 png_error(png_ptr,
615 "out of memory in pngtest->png_debug_malloc");
616 }
617
618 pinfo->next = pinformation;
619 pinformation = pinfo;
620 /* Make sure the caller isn't assuming zeroed memory. */
621 png_memset(pinfo->pointer, 0xdd, pinfo->size);
622
623 if (verbose)
624 printf("png_malloc %lu bytes at %p\n", (unsigned long)size,
625 pinfo->pointer);
626
627 return (png_voidp)(pinfo->pointer);
628 }
629 }
630
631 /* Free a pointer. It is removed from the list at the same time. */
632 void PNGCBAPI
633 png_debug_free(png_structp png_ptr, png_voidp ptr)
634 {
635 if (png_ptr == NULL)
636 fprintf(STDERR, "NULL pointer to png_debug_free.\n");
637
638 if (ptr == 0)
639 {
640 #if 0 /* This happens all the time. */
641 fprintf(STDERR, "WARNING: freeing NULL pointer\n");
642 #endif
643 return;
644 }
645
646 /* Unlink the element from the list. */
647 {
648 memory_infop FAR *ppinfo = &pinformation;
649
650 for (;;)
651 {
652 memory_infop pinfo = *ppinfo;
653
654 if (pinfo->pointer == ptr)
655 {
656 *ppinfo = pinfo->next;
657 current_allocation -= pinfo->size;
658 if (current_allocation < 0)
659 fprintf(STDERR, "Duplicate free of memory\n");
660 /* We must free the list element too, but first kill
661 the memory that is to be freed. */
662 png_memset(ptr, 0x55, pinfo->size);
663 png_free_default(png_ptr, pinfo);
664 pinfo = NULL;
665 break;
666 }
667
668 if (pinfo->next == NULL)
669 {
670 fprintf(STDERR, "Pointer %x not found\n", (unsigned int)ptr);
671 break;
672 }
673
674 ppinfo = &pinfo->next;
675 }
676 }
677
678 /* Finally free the data. */
679 if (verbose)
680 printf("Freeing %p\n", ptr);
681
682 png_free_default(png_ptr, ptr);
683 ptr = NULL;
684 }
685 #endif /* PNG_USER_MEM_SUPPORTED && PNG_DEBUG */
686 /* END of code to test memory allocation/deallocation */
687
688
689 /* Demonstration of user chunk support of the sTER and vpAg chunks */
690 #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
691
692 /* (sTER is a public chunk not yet known by libpng. vpAg is a private
693 chunk used in ImageMagick to store "virtual page" size). */
694
695 static png_uint_32 user_chunk_data[4];
696
697 /* 0: sTER mode + 1
698 * 1: vpAg width
699 * 2: vpAg height
700 * 3: vpAg units
701 */
702
703 static int PNGCBAPI read_user_chunk_callback(png_struct *png_ptr,
704 png_unknown_chunkp chunk)
705 {
706 png_uint_32
707 *my_user_chunk_data;
708
709 /* Return one of the following:
710 * return (-n); chunk had an error
711 * return (0); did not recognize
712 * return (n); success
713 *
714 * The unknown chunk structure contains the chunk data:
715 * png_byte name[5];
716 * png_byte *data;
717 * png_size_t size;
718 *
719 * Note that libpng has already taken care of the CRC handling.
720 */
721
722 if (chunk->name[0] == 115 && chunk->name[1] == 84 && /* s T */
723 chunk->name[2] == 69 && chunk->name[3] == 82) /* E R */
724 {
725 /* Found sTER chunk */
726 if (chunk->size != 1)
727 return (-1); /* Error return */
728
729 if (chunk->data[0] != 0 && chunk->data[0] != 1)
730 return (-1); /* Invalid mode */
731
732 my_user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
733 my_user_chunk_data[0]=chunk->data[0]+1;
734 return (1);
735 }
736
737 if (chunk->name[0] != 118 || chunk->name[1] != 112 || /* v p */
738 chunk->name[2] != 65 || chunk->name[3] != 103) /* A g */
739 return (0); /* Did not recognize */
740
741 /* Found ImageMagick vpAg chunk */
742
743 if (chunk->size != 9)
744 return (-1); /* Error return */
745
746 my_user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
747
748 my_user_chunk_data[1]=png_get_uint_31(png_ptr, chunk->data);
749 my_user_chunk_data[2]=png_get_uint_31(png_ptr, chunk->data + 4);
750 my_user_chunk_data[3]=(png_uint_32)chunk->data[8];
751
752 return (1);
753
754 }
755 #endif
756 /* END of code to demonstrate user chunk support */
757
758 /* Test one file */
759 int
760 test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
761 {
762 static png_FILE_p fpin;
763 static png_FILE_p fpout; /* "static" prevents setjmp corruption */
764 png_structp read_ptr;
765 png_infop read_info_ptr, end_info_ptr;
766 #ifdef PNG_WRITE_SUPPORTED
767 png_structp write_ptr;
768 png_infop write_info_ptr;
769 png_infop write_end_info_ptr;
770 #else
771 png_structp write_ptr = NULL;
772 png_infop write_info_ptr = NULL;
773 png_infop write_end_info_ptr = NULL;
774 #endif
775 png_bytep row_buf;
776 png_uint_32 y;
777 png_uint_32 width, height;
778 int num_pass, pass;
779 int bit_depth, color_type;
780 #ifdef PNG_SETJMP_SUPPORTED
781 #ifdef USE_FAR_KEYWORD
782 jmp_buf png_jmpbuf;
783 #endif
784 #endif
785
786 char inbuf[256], outbuf[256];
787
788 row_buf = NULL;
789
790 if ((fpin = fopen(inname, "rb")) == NULL)
791 {
792 fprintf(STDERR, "Could not find input file %s\n", inname);
793 return (1);
794 }
795
796 if ((fpout = fopen(outname, "wb")) == NULL)
797 {
798 fprintf(STDERR, "Could not open output file %s\n", outname);
799 FCLOSE(fpin);
800 return (1);
801 }
802
803 pngtest_debug("Allocating read and write structures");
804 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
805 read_ptr =
806 png_create_read_struct_2(PNG_LIBPNG_VER_STRING, NULL,
807 NULL, NULL, NULL, png_debug_malloc, png_debug_free);
808 #else
809 read_ptr =
810 png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
811 #endif
812 #ifndef PNG_STDIO_SUPPORTED
813 png_set_error_fn(read_ptr, (png_voidp)inname, pngtest_error,
814 pngtest_warning);
815 #endif
816
817 #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
818 user_chunk_data[0] = 0;
819 user_chunk_data[1] = 0;
820 user_chunk_data[2] = 0;
821 user_chunk_data[3] = 0;
822 png_set_read_user_chunk_fn(read_ptr, user_chunk_data,
823 read_user_chunk_callback);
824
825 #endif
826 #ifdef PNG_WRITE_SUPPORTED
827 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
828 write_ptr =
829 png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL,
830 NULL, NULL, NULL, png_debug_malloc, png_debug_free);
831 #else
832 write_ptr =
833 png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
834 #endif
835 #ifndef PNG_STDIO_SUPPORTED
836 png_set_error_fn(write_ptr, (png_voidp)inname, pngtest_error,
837 pngtest_warning);
838 #endif
839 #endif
840 pngtest_debug("Allocating read_info, write_info and end_info structures");
841 read_info_ptr = png_create_info_struct(read_ptr);
842 end_info_ptr = png_create_info_struct(read_ptr);
843 #ifdef PNG_WRITE_SUPPORTED
844 write_info_ptr = png_create_info_struct(write_ptr);
845 write_end_info_ptr = png_create_info_struct(write_ptr);
846 #endif
847
848 #ifdef PNG_SETJMP_SUPPORTED
849 pngtest_debug("Setting jmpbuf for read struct");
850 #ifdef USE_FAR_KEYWORD
851 if (setjmp(png_jmpbuf))
852 #else
853 if (setjmp(png_jmpbuf(read_ptr)))
854 #endif
855 {
856 fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
857 png_free(read_ptr, row_buf);
858 row_buf = NULL;
859 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
860 #ifdef PNG_WRITE_SUPPORTED
861 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
862 png_destroy_write_struct(&write_ptr, &write_info_ptr);
863 #endif
864 FCLOSE(fpin);
865 FCLOSE(fpout);
866 return (1);
867 }
868 #ifdef USE_FAR_KEYWORD
869 png_memcpy(png_jmpbuf(read_ptr), png_jmpbuf, png_sizeof(jmp_buf));
870 #endif
871
872 #ifdef PNG_WRITE_SUPPORTED
873 pngtest_debug("Setting jmpbuf for write struct");
874 #ifdef USE_FAR_KEYWORD
875
876 if (setjmp(png_jmpbuf))
877 #else
878 if (setjmp(png_jmpbuf(write_ptr)))
879 #endif
880 {
881 fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
882 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
883 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
884 #ifdef PNG_WRITE_SUPPORTED
885 png_destroy_write_struct(&write_ptr, &write_info_ptr);
886 #endif
887 FCLOSE(fpin);
888 FCLOSE(fpout);
889 return (1);
890 }
891
892 #ifdef USE_FAR_KEYWORD
893 png_memcpy(png_jmpbuf(write_ptr), png_jmpbuf, png_sizeof(jmp_buf));
894 #endif
895 #endif
896 #endif
897
898 pngtest_debug("Initializing input and output streams");
899 #ifdef PNG_STDIO_SUPPORTED
900 png_init_io(read_ptr, fpin);
901 # ifdef PNG_WRITE_SUPPORTED
902 png_init_io(write_ptr, fpout);
903 # endif
904 #else
905 png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data);
906 # ifdef PNG_WRITE_SUPPORTED
907 png_set_write_fn(write_ptr, (png_voidp)fpout, pngtest_write_data,
908 # ifdef PNG_WRITE_FLUSH_SUPPORTED
909 pngtest_flush);
910 # else
911 NULL);
912 # endif
913 # endif
914 #endif
915
916 if (status_dots_requested == 1)
917 {
918 #ifdef PNG_WRITE_SUPPORTED
919 png_set_write_status_fn(write_ptr, write_row_callback);
920 #endif
921 png_set_read_status_fn(read_ptr, read_row_callback);
922 }
923
924 else
925 {
926 #ifdef PNG_WRITE_SUPPORTED
927 png_set_write_status_fn(write_ptr, NULL);
928 #endif
929 png_set_read_status_fn(read_ptr, NULL);
930 }
931
932 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
933 {
934 int i;
935
936 for (i = 0; i<256; i++)
937 filters_used[i] = 0;
938
939 png_set_read_user_transform_fn(read_ptr, count_filters);
940 }
941 #endif
942 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
943 zero_samples = 0;
944 png_set_write_user_transform_fn(write_ptr, count_zero_samples);
945 #endif
946
947 #ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
948 # ifndef PNG_HANDLE_CHUNK_ALWAYS
949 # define PNG_HANDLE_CHUNK_ALWAYS 3
950 # endif
951 png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS,
952 NULL, 0);
953 #endif
954 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
955 # ifndef PNG_HANDLE_CHUNK_IF_SAFE
956 # define PNG_HANDLE_CHUNK_IF_SAFE 2
957 # endif
958 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_IF_SAFE,
959 NULL, 0);
960 #endif
961
962 pngtest_debug("Reading info struct");
963 png_read_info(read_ptr, read_info_ptr);
964
965 pngtest_debug("Transferring info struct");
966 {
967 int interlace_type, compression_type, filter_type;
968
969 if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth,
970 &color_type, &interlace_type, &compression_type, &filter_type))
971 {
972 png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth,
973 #ifdef PNG_WRITE_INTERLACING_SUPPORTED
974 color_type, interlace_type, compression_type, filter_type);
975 #else
976 color_type, PNG_INTERLACE_NONE, compression_type, filter_type);
977 #endif
978 }
979 }
980 #ifdef PNG_FIXED_POINT_SUPPORTED
981 #ifdef PNG_cHRM_SUPPORTED
982 {
983 png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
984 blue_y;
985
986 if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y,
987 &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y))
988 {
989 png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x,
990 red_y, green_x, green_y, blue_x, blue_y);
991 }
992 }
993 #endif
994 #ifdef PNG_gAMA_SUPPORTED
995 {
996 png_fixed_point gamma;
997
998 if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma))
999 png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma);
1000 }
1001 #endif
1002 #else /* Use floating point versions */
1003 #ifdef PNG_FLOATING_POINT_SUPPORTED
1004 #ifdef PNG_cHRM_SUPPORTED
1005 {
1006 double white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
1007 blue_y;
1008
1009 if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
1010 &red_y, &green_x, &green_y, &blue_x, &blue_y))
1011 {
1012 png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x,
1013 red_y, green_x, green_y, blue_x, blue_y);
1014 }
1015 }
1016 #endif
1017 #ifdef PNG_gAMA_SUPPORTED
1018 {
1019 double gamma;
1020
1021 if (png_get_gAMA(read_ptr, read_info_ptr, &gamma))
1022 png_set_gAMA(write_ptr, write_info_ptr, gamma);
1023 }
1024 #endif
1025 #endif /* Floating point */
1026 #endif /* Fixed point */
1027 #ifdef PNG_iCCP_SUPPORTED
1028 {
1029 png_charp name;
1030 png_bytep profile;
1031 png_uint_32 proflen;
1032 int compression_type;
1033
1034 if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type,
1035 &profile, &proflen))
1036 {
1037 png_set_iCCP(write_ptr, write_info_ptr, name, compression_type,
1038 profile, proflen);
1039 }
1040 }
1041 #endif
1042 #ifdef PNG_sRGB_SUPPORTED
1043 {
1044 int intent;
1045
1046 if (png_get_sRGB(read_ptr, read_info_ptr, &intent))
1047 png_set_sRGB(write_ptr, write_info_ptr, intent);
1048 }
1049 #endif
1050 {
1051 png_colorp palette;
1052 int num_palette;
1053
1054 if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette))
1055 png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
1056 }
1057 #ifdef PNG_bKGD_SUPPORTED
1058 {
1059 png_color_16p background;
1060
1061 if (png_get_bKGD(read_ptr, read_info_ptr, &background))
1062 {
1063 png_set_bKGD(write_ptr, write_info_ptr, background);
1064 }
1065 }
1066 #endif
1067 #ifdef PNG_hIST_SUPPORTED
1068 {
1069 png_uint_16p hist;
1070
1071 if (png_get_hIST(read_ptr, read_info_ptr, &hist))
1072 png_set_hIST(write_ptr, write_info_ptr, hist);
1073 }
1074 #endif
1075 #ifdef PNG_oFFs_SUPPORTED
1076 {
1077 png_int_32 offset_x, offset_y;
1078 int unit_type;
1079
1080 if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y,
1081 &unit_type))
1082 {
1083 png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
1084 }
1085 }
1086 #endif
1087 #ifdef PNG_pCAL_SUPPORTED
1088 {
1089 png_charp purpose, units;
1090 png_charpp params;
1091 png_int_32 X0, X1;
1092 int type, nparams;
1093
1094 if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type,
1095 &nparams, &units, &params))
1096 {
1097 png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type,
1098 nparams, units, params);
1099 }
1100 }
1101 #endif
1102 #ifdef PNG_pHYs_SUPPORTED
1103 {
1104 png_uint_32 res_x, res_y;
1105 int unit_type;
1106
1107 if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y, &unit_type))
1108 png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type);
1109 }
1110 #endif
1111 #ifdef PNG_sBIT_SUPPORTED
1112 {
1113 png_color_8p sig_bit;
1114
1115 if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit))
1116 png_set_sBIT(write_ptr, write_info_ptr, sig_bit);
1117 }
1118 #endif
1119 #ifdef PNG_sCAL_SUPPORTED
1120 #ifdef PNG_FLOATING_POINT_SUPPORTED
1121 {
1122 int unit;
1123 double scal_width, scal_height;
1124
1125 if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width,
1126 &scal_height))
1127 {
1128 png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height);
1129 }
1130 }
1131 #else
1132 #ifdef PNG_FIXED_POINT_SUPPORTED
1133 {
1134 int unit;
1135 png_charp scal_width, scal_height;
1136
1137 if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width,
1138 &scal_height))
1139 {
1140 png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width,
1141 scal_height);
1142 }
1143 }
1144 #endif
1145 #endif
1146 #endif
1147 #ifdef PNG_TEXT_SUPPORTED
1148 {
1149 png_textp text_ptr;
1150 int num_text;
1151
1152 if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
1153 {
1154 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1155 png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
1156 }
1157 }
1158 #endif
1159 #ifdef PNG_tIME_SUPPORTED
1160 {
1161 png_timep mod_time;
1162
1163 if (png_get_tIME(read_ptr, read_info_ptr, &mod_time))
1164 {
1165 png_set_tIME(write_ptr, write_info_ptr, mod_time);
1166 #ifdef PNG_TIME_RFC1123_SUPPORTED
1167 /* We have to use png_memcpy instead of "=" because the string
1168 * pointed to by png_convert_to_rfc1123() gets free'ed before
1169 * we use it.
1170 */
1171 png_memcpy(tIME_string,
1172 png_convert_to_rfc1123(read_ptr, mod_time),
1173 png_sizeof(tIME_string));
1174
1175 tIME_string[png_sizeof(tIME_string) - 1] = '\0';
1176 tIME_chunk_present++;
1177 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1178 }
1179 }
1180 #endif
1181 #ifdef PNG_tRNS_SUPPORTED
1182 {
1183 png_bytep trans_alpha;
1184 int num_trans;
1185 png_color_16p trans_color;
1186
1187 if (png_get_tRNS(read_ptr, read_info_ptr, &trans_alpha, &num_trans,
1188 &trans_color))
1189 {
1190 int sample_max = (1 << bit_depth);
1191 /* libpng doesn't reject a tRNS chunk with out-of-range samples */
1192 if (!((color_type == PNG_COLOR_TYPE_GRAY &&
1193 (int)trans_color->gray > sample_max) ||
1194 (color_type == PNG_COLOR_TYPE_RGB &&
1195 ((int)trans_color->red > sample_max ||
1196 (int)trans_color->green > sample_max ||
1197 (int)trans_color->blue > sample_max))))
1198 png_set_tRNS(write_ptr, write_info_ptr, trans_alpha, num_trans,
1199 trans_color);
1200 }
1201 }
1202 #endif
1203 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1204 {
1205 png_unknown_chunkp unknowns;
1206 int num_unknowns = png_get_unknown_chunks(read_ptr, read_info_ptr,
1207 &unknowns);
1208
1209 if (num_unknowns)
1210 {
1211 int i;
1212 png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns,
1213 num_unknowns);
1214 /* Copy the locations from the read_info_ptr. The automatically
1215 * generated locations in write_info_ptr are wrong because we
1216 * haven't written anything yet.
1217 */
1218 for (i = 0; i < num_unknowns; i++)
1219 png_set_unknown_chunk_location(write_ptr, write_info_ptr, i,
1220 unknowns[i].location);
1221 }
1222 }
1223 #endif
1224
1225 #ifdef PNG_WRITE_SUPPORTED
1226 pngtest_debug("Writing info struct");
1227
1228 /* If we wanted, we could write info in two steps:
1229 * png_write_info_before_PLTE(write_ptr, write_info_ptr);
1230 */
1231 png_write_info(write_ptr, write_info_ptr);
1232
1233 #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
1234 if (user_chunk_data[0] != 0)
1235 {
1236 png_byte png_sTER[5] = {115, 84, 69, 82, '\0'};
1237
1238 unsigned char
1239 ster_chunk_data[1];
1240
1241 if (verbose)
1242 fprintf(STDERR, "\n stereo mode = %lu\n",
1243 (unsigned long)(user_chunk_data[0] - 1));
1244
1245 ster_chunk_data[0]=(unsigned char)(user_chunk_data[0] - 1);
1246 png_write_chunk(write_ptr, png_sTER, ster_chunk_data, 1);
1247 }
1248
1249 if (user_chunk_data[1] != 0 || user_chunk_data[2] != 0)
1250 {
1251 png_byte png_vpAg[5] = {118, 112, 65, 103, '\0'};
1252
1253 unsigned char
1254 vpag_chunk_data[9];
1255
1256 if (verbose)
1257 fprintf(STDERR, " vpAg = %lu x %lu, units = %lu\n",
1258 (unsigned long)user_chunk_data[1],
1259 (unsigned long)user_chunk_data[2],
1260 (unsigned long)user_chunk_data[3]);
1261
1262 png_save_uint_32(vpag_chunk_data, user_chunk_data[1]);
1263 png_save_uint_32(vpag_chunk_data + 4, user_chunk_data[2]);
1264 vpag_chunk_data[8] = (unsigned char)(user_chunk_data[3] & 0xff);
1265 png_write_chunk(write_ptr, png_vpAg, vpag_chunk_data, 9);
1266 }
1267
1268 #endif
1269 #endif
1270
1271 #ifdef SINGLE_ROWBUF_ALLOC
1272 pngtest_debug("Allocating row buffer...");
1273 row_buf = (png_bytep)png_malloc(read_ptr,
1274 png_get_rowbytes(read_ptr, read_info_ptr));
1275
1276 pngtest_debug1("\t0x%08lx", (unsigned long)row_buf);
1277 #endif /* SINGLE_ROWBUF_ALLOC */
1278 pngtest_debug("Writing row data");
1279
1280 #if defined(PNG_READ_INTERLACING_SUPPORTED) || \
1281 defined(PNG_WRITE_INTERLACING_SUPPORTED)
1282 num_pass = png_set_interlace_handling(read_ptr);
1283 # ifdef PNG_WRITE_SUPPORTED
1284 png_set_interlace_handling(write_ptr);
1285 # endif
1286 #else
1287 num_pass = 1;
1288 #endif
1289
1290 #ifdef PNGTEST_TIMING
1291 t_stop = (float)clock();
1292 t_misc += (t_stop - t_start);
1293 t_start = t_stop;
1294 #endif
1295 for (pass = 0; pass < num_pass; pass++)
1296 {
1297 pngtest_debug1("Writing row data for pass %d", pass);
1298 for (y = 0; y < height; y++)
1299 {
1300 #ifndef SINGLE_ROWBUF_ALLOC
1301 pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y);
1302 row_buf = (png_bytep)png_malloc(read_ptr,
1303 png_get_rowbytes(read_ptr, read_info_ptr));
1304
1305 pngtest_debug2("\t0x%08lx (%u bytes)", (unsigned long)row_buf,
1306 png_get_rowbytes(read_ptr, read_info_ptr));
1307
1308 #endif /* !SINGLE_ROWBUF_ALLOC */
1309 png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1);
1310
1311 #ifdef PNG_WRITE_SUPPORTED
1312 #ifdef PNGTEST_TIMING
1313 t_stop = (float)clock();
1314 t_decode += (t_stop - t_start);
1315 t_start = t_stop;
1316 #endif
1317 png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
1318 #ifdef PNGTEST_TIMING
1319 t_stop = (float)clock();
1320 t_encode += (t_stop - t_start);
1321 t_start = t_stop;
1322 #endif
1323 #endif /* PNG_WRITE_SUPPORTED */
1324
1325 #ifndef SINGLE_ROWBUF_ALLOC
1326 pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y);
1327 png_free(read_ptr, row_buf);
1328 row_buf = NULL;
1329 #endif /* !SINGLE_ROWBUF_ALLOC */
1330 }
1331 }
1332
1333 #ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1334 png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1);
1335 #endif
1336 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1337 png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
1338 #endif
1339
1340 pngtest_debug("Reading and writing end_info data");
1341
1342 png_read_end(read_ptr, end_info_ptr);
1343 #ifdef PNG_TEXT_SUPPORTED
1344 {
1345 png_textp text_ptr;
1346 int num_text;
1347
1348 if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
1349 {
1350 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1351 png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
1352 }
1353 }
1354 #endif
1355 #ifdef PNG_tIME_SUPPORTED
1356 {
1357 png_timep mod_time;
1358
1359 if (png_get_tIME(read_ptr, end_info_ptr, &mod_time))
1360 {
1361 png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
1362 #ifdef PNG_TIME_RFC1123_SUPPORTED
1363 /* We have to use png_memcpy instead of "=" because the string
1364 pointed to by png_convert_to_rfc1123() gets free'ed before
1365 we use it */
1366 png_memcpy(tIME_string,
1367 png_convert_to_rfc1123(read_ptr, mod_time),
1368 png_sizeof(tIME_string));
1369
1370 tIME_string[png_sizeof(tIME_string) - 1] = '\0';
1371 tIME_chunk_present++;
1372 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1373 }
1374 }
1375 #endif
1376 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1377 {
1378 png_unknown_chunkp unknowns;
1379 int num_unknowns = png_get_unknown_chunks(read_ptr, end_info_ptr,
1380 &unknowns);
1381
1382 if (num_unknowns)
1383 {
1384 int i;
1385 png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns,
1386 num_unknowns);
1387 /* Copy the locations from the read_info_ptr. The automatically
1388 * generated locations in write_end_info_ptr are wrong because we
1389 * haven't written the end_info yet.
1390 */
1391 for (i = 0; i < num_unknowns; i++)
1392 png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i,
1393 unknowns[i].location);
1394 }
1395 }
1396 #endif
1397 #ifdef PNG_WRITE_SUPPORTED
1398 png_write_end(write_ptr, write_end_info_ptr);
1399 #endif
1400
1401 #ifdef PNG_EASY_ACCESS_SUPPORTED
1402 if (verbose)
1403 {
1404 png_uint_32 iwidth, iheight;
1405 iwidth = png_get_image_width(write_ptr, write_info_ptr);
1406 iheight = png_get_image_height(write_ptr, write_info_ptr);
1407 fprintf(STDERR, "\n Image width = %lu, height = %lu\n",
1408 (unsigned long)iwidth, (unsigned long)iheight);
1409 }
1410 #endif
1411
1412 pngtest_debug("Destroying data structs");
1413 #ifdef SINGLE_ROWBUF_ALLOC
1414 pngtest_debug("destroying row_buf for read_ptr");
1415 png_free(read_ptr, row_buf);
1416 row_buf = NULL;
1417 #endif /* SINGLE_ROWBUF_ALLOC */
1418 pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr");
1419 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
1420 #ifdef PNG_WRITE_SUPPORTED
1421 pngtest_debug("destroying write_end_info_ptr");
1422 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
1423 pngtest_debug("destroying write_ptr, write_info_ptr");
1424 png_destroy_write_struct(&write_ptr, &write_info_ptr);
1425 #endif
1426 pngtest_debug("Destruction complete.");
1427
1428 FCLOSE(fpin);
1429 FCLOSE(fpout);
1430
1431 pngtest_debug("Opening files for comparison");
1432 if ((fpin = fopen(inname, "rb")) == NULL)
1433 {
1434 fprintf(STDERR, "Could not find file %s\n", inname);
1435 return (1);
1436 }
1437
1438 if ((fpout = fopen(outname, "rb")) == NULL)
1439 {
1440 fprintf(STDERR, "Could not find file %s\n", outname);
1441 FCLOSE(fpin);
1442 return (1);
1443 }
1444
1445 for (;;)
1446 {
1447 png_size_t num_in, num_out;
1448
1449 num_in = fread(inbuf, 1, 1, fpin);
1450 num_out = fread(outbuf, 1, 1, fpout);
1451
1452 if (num_in != num_out)
1453 {
1454 fprintf(STDERR, "\nFiles %s and %s are of a different size\n",
1455 inname, outname);
1456
1457 if (wrote_question == 0)
1458 {
1459 fprintf(STDERR,
1460 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1461 inname, PNG_ZBUF_SIZE);
1462 fprintf(STDERR,
1463 "\n filtering heuristic (libpng default), compression");
1464 fprintf(STDERR,
1465 " level (zlib default),\n and zlib version (%s)?\n\n",
1466 ZLIB_VERSION);
1467 wrote_question = 1;
1468 }
1469
1470 FCLOSE(fpin);
1471 FCLOSE(fpout);
1472 return (0);
1473 }
1474
1475 if (!num_in)
1476 break;
1477
1478 if (png_memcmp(inbuf, outbuf, num_in))
1479 {
1480 fprintf(STDERR, "\nFiles %s and %s are different\n", inname, outname);
1481
1482 if (wrote_question == 0)
1483 {
1484 fprintf(STDERR,
1485 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1486 inname, PNG_ZBUF_SIZE);
1487 fprintf(STDERR,
1488 "\n filtering heuristic (libpng default), compression");
1489 fprintf(STDERR,
1490 " level (zlib default),\n and zlib version (%s)?\n\n",
1491 ZLIB_VERSION);
1492 wrote_question = 1;
1493 }
1494
1495 FCLOSE(fpin);
1496 FCLOSE(fpout);
1497 return (0);
1498 }
1499 }
1500
1501 FCLOSE(fpin);
1502 FCLOSE(fpout);
1503
1504 return (0);
1505 }
1506
1507 /* Input and output filenames */
1508 #ifdef RISCOS
1509 static PNG_CONST char *inname = "pngtest/png";
1510 static PNG_CONST char *outname = "pngout/png";
1511 #else
1512 static PNG_CONST char *inname = "pngtest.png";
1513 static PNG_CONST char *outname = "pngout.png";
1514 #endif
1515
1516 int
1517 main(int argc, char *argv[])
1518 {
1519 int multiple = 0;
1520 int ierror = 0;
1521
1522 fprintf(STDERR, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
1523 fprintf(STDERR, " with zlib version %s\n", ZLIB_VERSION);
1524 fprintf(STDERR, "%s", png_get_copyright(NULL));
1525 /* Show the version of libpng used in building the library */
1526 fprintf(STDERR, " library (%lu):%s",
1527 (unsigned long)png_access_version_number(),
1528 png_get_header_version(NULL));
1529
1530 /* Show the version of libpng used in building the application */
1531 fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
1532 PNG_HEADER_VERSION_STRING);
1533
1534 /* Do some consistency checking on the memory allocation settings, I'm
1535 * not sure this matters, but it is nice to know, the first of these
1536 * tests should be impossible because of the way the macros are set
1537 * in pngconf.h
1538 */
1539 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1540 fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n");
1541 #endif
1542 /* I think the following can happen. */
1543 #if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1544 fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n");
1545 #endif
1546
1547 if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING))
1548 {
1549 fprintf(STDERR,
1550 "Warning: versions are different between png.h and png.c\n");
1551 fprintf(STDERR, " png.h version: %s\n", PNG_LIBPNG_VER_STRING);
1552 fprintf(STDERR, " png.c version: %s\n\n", png_libpng_ver);
1553 ++ierror;
1554 }
1555
1556 if (argc > 1)
1557 {
1558 if (strcmp(argv[1], "-m") == 0)
1559 {
1560 multiple = 1;
1561 status_dots_requested = 0;
1562 }
1563
1564 else if (strcmp(argv[1], "-mv") == 0 ||
1565 strcmp(argv[1], "-vm") == 0 )
1566 {
1567 multiple = 1;
1568 verbose = 1;
1569 status_dots_requested = 1;
1570 }
1571
1572 else if (strcmp(argv[1], "-v") == 0)
1573 {
1574 verbose = 1;
1575 status_dots_requested = 1;
1576 inname = argv[2];
1577 }
1578
1579 else
1580 {
1581 inname = argv[1];
1582 status_dots_requested = 0;
1583 }
1584 }
1585
1586 if (!multiple && argc == 3 + verbose)
1587 outname = argv[2 + verbose];
1588
1589 if ((!multiple && argc > 3 + verbose) || (multiple && argc < 2))
1590 {
1591 fprintf(STDERR,
1592 "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
1593 argv[0], argv[0]);
1594 fprintf(STDERR,
1595 " reads/writes one PNG file (without -m) or multiple files (-m)\n");
1596 fprintf(STDERR,
1597 " with -m %s is used as a temporary file\n", outname);
1598 exit(1);
1599 }
1600
1601 if (multiple)
1602 {
1603 int i;
1604 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1605 int allocation_now = current_allocation;
1606 #endif
1607 for (i=2; i<argc; ++i)
1608 {
1609 int kerror;
1610 fprintf(STDERR, "\n Testing %s:", argv[i]);
1611 kerror = test_one_file(argv[i], outname);
1612 if (kerror == 0)
1613 {
1614 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1615 int k;
1616 #endif
1617 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1618 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1619 (unsigned long)zero_samples);
1620 #else
1621 fprintf(STDERR, " PASS\n");
1622 #endif
1623 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1624 for (k = 0; k<256; k++)
1625 if (filters_used[k])
1626 fprintf(STDERR, " Filter %d was used %lu times\n",
1627 k, (unsigned long)filters_used[k]);
1628 #endif
1629 #ifdef PNG_TIME_RFC1123_SUPPORTED
1630 if (tIME_chunk_present != 0)
1631 fprintf(STDERR, " tIME = %s\n", tIME_string);
1632
1633 tIME_chunk_present = 0;
1634 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1635 }
1636
1637 else
1638 {
1639 fprintf(STDERR, " FAIL\n");
1640 ierror += kerror;
1641 }
1642 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1643 if (allocation_now != current_allocation)
1644 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1645 current_allocation - allocation_now);
1646
1647 if (current_allocation != 0)
1648 {
1649 memory_infop pinfo = pinformation;
1650
1651 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1652 current_allocation);
1653
1654 while (pinfo != NULL)
1655 {
1656 fprintf(STDERR, " %lu bytes at %x\n",
1657 (unsigned long)pinfo->size,
1658 (unsigned int)pinfo->pointer);
1659 pinfo = pinfo->next;
1660 }
1661 }
1662 #endif
1663 }
1664 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1665 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1666 current_allocation);
1667 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1668 maximum_allocation);
1669 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1670 total_allocation);
1671 fprintf(STDERR, " Number of allocations: %10d\n",
1672 num_allocations);
1673 #endif
1674 }
1675
1676 else
1677 {
1678 int i;
1679 for (i = 0; i<3; ++i)
1680 {
1681 int kerror;
1682 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1683 int allocation_now = current_allocation;
1684 #endif
1685 if (i == 1)
1686 status_dots_requested = 1;
1687
1688 else if (verbose == 0)
1689 status_dots_requested = 0;
1690
1691 if (i == 0 || verbose == 1 || ierror != 0)
1692 fprintf(STDERR, "\n Testing %s:", inname);
1693
1694 kerror = test_one_file(inname, outname);
1695
1696 if (kerror == 0)
1697 {
1698 if (verbose == 1 || i == 2)
1699 {
1700 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1701 int k;
1702 #endif
1703 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1704 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1705 (unsigned long)zero_samples);
1706 #else
1707 fprintf(STDERR, " PASS\n");
1708 #endif
1709 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1710 for (k = 0; k<256; k++)
1711 if (filters_used[k])
1712 fprintf(STDERR, " Filter %d was used %lu times\n",
1713 k, (unsigned long)filters_used[k]);
1714 #endif
1715 #ifdef PNG_TIME_RFC1123_SUPPORTED
1716 if (tIME_chunk_present != 0)
1717 fprintf(STDERR, " tIME = %s\n", tIME_string);
1718 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1719 }
1720 }
1721
1722 else
1723 {
1724 if (verbose == 0 && i != 2)
1725 fprintf(STDERR, "\n Testing %s:", inname);
1726
1727 fprintf(STDERR, " FAIL\n");
1728 ierror += kerror;
1729 }
1730 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1731 if (allocation_now != current_allocation)
1732 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1733 current_allocation - allocation_now);
1734
1735 if (current_allocation != 0)
1736 {
1737 memory_infop pinfo = pinformation;
1738
1739 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1740 current_allocation);
1741
1742 while (pinfo != NULL)
1743 {
1744 fprintf(STDERR, " %lu bytes at %x\n",
1745 (unsigned long)pinfo->size, (unsigned int)pinfo->pointer);
1746 pinfo = pinfo->next;
1747 }
1748 }
1749 #endif
1750 }
1751 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1752 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1753 current_allocation);
1754 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1755 maximum_allocation);
1756 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1757 total_allocation);
1758 fprintf(STDERR, " Number of allocations: %10d\n",
1759 num_allocations);
1760 #endif
1761 }
1762
1763 #ifdef PNGTEST_TIMING
1764 t_stop = (float)clock();
1765 t_misc += (t_stop - t_start);
1766 t_start = t_stop;
1767 fprintf(STDERR, " CPU time used = %.3f seconds",
1768 (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC);
1769 fprintf(STDERR, " (decoding %.3f,\n",
1770 t_decode/(float)CLOCKS_PER_SEC);
1771 fprintf(STDERR, " encoding %.3f ,",
1772 t_encode/(float)CLOCKS_PER_SEC);
1773 fprintf(STDERR, " other %.3f seconds)\n\n",
1774 t_misc/(float)CLOCKS_PER_SEC);
1775 #endif
1776
1777 if (ierror == 0)
1778 fprintf(STDERR, " libpng passes test\n");
1779
1780 else
1781 fprintf(STDERR, " libpng FAILS test\n");
1782
1783 return (int)(ierror != 0);
1784 }
1785
1786 /* Generate a compiler error if there is an old png.h in the search path. */
1787 typedef png_libpng_version_1_5_2 Your_png_h_is_not_version_1_5_2;
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