source: libpng/vendor/current/pngtest.c@ 1059

Last change on this file since 1059 was 1059, checked in by Silvan Scherrer, 10 years ago

libpng: update vendor to 1.6.16
File size: 57.1 KB
Line 
1
2/* pngtest.c - a simple test program to test libpng
3 *
4 * Last changed in libpng 1.6.15 [November 20, 2014]
5 * Copyright (c) 1998-2014 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#define _POSIX_SOURCE 1
35
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39
40/* Defined so I can write to a file on gui/windowing platforms */
41/* #define STDERR stderr */
42#define STDERR stdout /* For DOS */
43
44#include "png.h"
45
46/* Known chunks that exist in pngtest.png must be supported or pngtest will fail
47 * simply as a result of re-ordering them. This may be fixed in 1.7
48 *
49 * pngtest allocates a single row buffer for each row and overwrites it,
50 * therefore if the write side doesn't support the writing of interlaced images
51 * nothing can be done for an interlaced image (and the code below will fail
52 * horribly trying to write extra data after writing garbage).
53 */
54#if defined PNG_READ_SUPPORTED && /* else nothing can be done */\
55 defined PNG_READ_bKGD_SUPPORTED &&\
56 defined PNG_READ_cHRM_SUPPORTED &&\
57 defined PNG_READ_gAMA_SUPPORTED &&\
58 defined PNG_READ_oFFs_SUPPORTED &&\
59 defined PNG_READ_pCAL_SUPPORTED &&\
60 defined PNG_READ_pHYs_SUPPORTED &&\
61 defined PNG_READ_sBIT_SUPPORTED &&\
62 defined PNG_READ_sCAL_SUPPORTED &&\
63 defined PNG_READ_sRGB_SUPPORTED &&\
64 defined PNG_READ_tEXt_SUPPORTED &&\
65 defined PNG_READ_tIME_SUPPORTED &&\
66 defined PNG_READ_zTXt_SUPPORTED &&\
67 defined PNG_WRITE_INTERLACING_SUPPORTED
68
69#ifdef PNG_ZLIB_HEADER
70# include PNG_ZLIB_HEADER /* defined by pnglibconf.h from 1.7 */
71#else
72# include "zlib.h"
73#endif
74
75/* Copied from pngpriv.h but only used in error messages below. */
76#ifndef PNG_ZBUF_SIZE
77# define PNG_ZBUF_SIZE 8192
78#endif
79#define FCLOSE(file) fclose(file)
80
81#ifndef PNG_STDIO_SUPPORTED
82typedef FILE * png_FILE_p;
83#endif
84
85/* Makes pngtest verbose so we can find problems. */
86#ifndef PNG_DEBUG
87# define PNG_DEBUG 0
88#endif
89
90#if PNG_DEBUG > 1
91# define pngtest_debug(m) ((void)fprintf(stderr, m "\n"))
92# define pngtest_debug1(m,p1) ((void)fprintf(stderr, m "\n", p1))
93# define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2))
94#else
95# define pngtest_debug(m) ((void)0)
96# define pngtest_debug1(m,p1) ((void)0)
97# define pngtest_debug2(m,p1,p2) ((void)0)
98#endif
99
100#if !PNG_DEBUG
101# define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */
102#endif
103
104/* Turn on CPU timing
105#define PNGTEST_TIMING
106*/
107
108#ifndef PNG_FLOATING_POINT_SUPPORTED
109#undef PNGTEST_TIMING
110#endif
111
112#ifdef PNGTEST_TIMING
113static float t_start, t_stop, t_decode, t_encode, t_misc;
114#include <time.h>
115#endif
116
117#ifdef PNG_TIME_RFC1123_SUPPORTED
118#define PNG_tIME_STRING_LENGTH 29
119static int tIME_chunk_present = 0;
120static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present";
121#endif
122
123static int verbose = 0;
124static int strict = 0;
125static int relaxed = 0;
126static int unsupported_chunks = 0; /* chunk unsupported by libpng in input */
127static int error_count = 0; /* count calls to png_error */
128static int warning_count = 0; /* count calls to png_warning */
129
130/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
131#ifndef png_jmpbuf
132# define png_jmpbuf(png_ptr) png_ptr->jmpbuf
133#endif
134
135/* Defines for unknown chunk handling if required. */
136#ifndef PNG_HANDLE_CHUNK_ALWAYS
137# define PNG_HANDLE_CHUNK_ALWAYS 3
138#endif
139#ifndef PNG_HANDLE_CHUNK_IF_SAFE
140# define PNG_HANDLE_CHUNK_IF_SAFE 2
141#endif
142
143/* Utility to save typing/errors, the argument must be a name */
144#define MEMZERO(var) ((void)memset(&var, 0, sizeof var))
145
146/* Example of using row callbacks to make a simple progress meter */
147static int status_pass = 1;
148static int status_dots_requested = 0;
149static int status_dots = 1;
150
151static void PNGCBAPI
152read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
153{
154 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX)
155 return;
156
157 if (status_pass != pass)
158 {
159 fprintf(stdout, "\n Pass %d: ", pass);
160 status_pass = pass;
161 status_dots = 31;
162 }
163
164 status_dots--;
165
166 if (status_dots == 0)
167 {
168 fprintf(stdout, "\n ");
169 status_dots=30;
170 }
171
172 fprintf(stdout, "r");
173}
174
175#ifdef PNG_WRITE_SUPPORTED
176static void PNGCBAPI
177write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
178{
179 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7)
180 return;
181
182 fprintf(stdout, "w");
183}
184#endif
185
186
187#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
188/* Example of using user transform callback (we don't transform anything,
189 * but merely examine the row filters. We set this to 256 rather than
190 * 5 in case illegal filter values are present.)
191 */
192static png_uint_32 filters_used[256];
193static void PNGCBAPI
194count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data)
195{
196 if (png_ptr != NULL && row_info != NULL)
197 ++filters_used[*(data - 1)];
198}
199#endif
200
201#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
202/* Example of using user transform callback (we don't transform anything,
203 * but merely count the zero samples)
204 */
205
206static png_uint_32 zero_samples;
207
208static void PNGCBAPI
209count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
210{
211 png_bytep dp = data;
212 if (png_ptr == NULL)
213 return;
214
215 /* Contents of row_info:
216 * png_uint_32 width width of row
217 * png_uint_32 rowbytes number of bytes in row
218 * png_byte color_type color type of pixels
219 * png_byte bit_depth bit depth of samples
220 * png_byte channels number of channels (1-4)
221 * png_byte pixel_depth bits per pixel (depth*channels)
222 */
223
224 /* Counts the number of zero samples (or zero pixels if color_type is 3 */
225
226 if (row_info->color_type == 0 || row_info->color_type == 3)
227 {
228 int pos = 0;
229 png_uint_32 n, nstop;
230
231 for (n = 0, nstop=row_info->width; n<nstop; n++)
232 {
233 if (row_info->bit_depth == 1)
234 {
235 if (((*dp << pos++ ) & 0x80) == 0)
236 zero_samples++;
237
238 if (pos == 8)
239 {
240 pos = 0;
241 dp++;
242 }
243 }
244
245 if (row_info->bit_depth == 2)
246 {
247 if (((*dp << (pos+=2)) & 0xc0) == 0)
248 zero_samples++;
249
250 if (pos == 8)
251 {
252 pos = 0;
253 dp++;
254 }
255 }
256
257 if (row_info->bit_depth == 4)
258 {
259 if (((*dp << (pos+=4)) & 0xf0) == 0)
260 zero_samples++;
261
262 if (pos == 8)
263 {
264 pos = 0;
265 dp++;
266 }
267 }
268
269 if (row_info->bit_depth == 8)
270 if (*dp++ == 0)
271 zero_samples++;
272
273 if (row_info->bit_depth == 16)
274 {
275 if ((*dp | *(dp+1)) == 0)
276 zero_samples++;
277 dp+=2;
278 }
279 }
280 }
281 else /* Other color types */
282 {
283 png_uint_32 n, nstop;
284 int channel;
285 int color_channels = row_info->channels;
286 if (row_info->color_type > 3)
287 color_channels--;
288
289 for (n = 0, nstop=row_info->width; n<nstop; n++)
290 {
291 for (channel = 0; channel < color_channels; channel++)
292 {
293 if (row_info->bit_depth == 8)
294 if (*dp++ == 0)
295 zero_samples++;
296
297 if (row_info->bit_depth == 16)
298 {
299 if ((*dp | *(dp+1)) == 0)
300 zero_samples++;
301
302 dp+=2;
303 }
304 }
305 if (row_info->color_type > 3)
306 {
307 dp++;
308 if (row_info->bit_depth == 16)
309 dp++;
310 }
311 }
312 }
313}
314#endif /* WRITE_USER_TRANSFORM */
315
316#ifndef PNG_STDIO_SUPPORTED
317/* START of code to validate stdio-free compilation */
318/* These copies of the default read/write functions come from pngrio.c and
319 * pngwio.c. They allow "don't include stdio" testing of the library.
320 * This is the function that does the actual reading of data. If you are
321 * not reading from a standard C stream, you should create a replacement
322 * read_data function and use it at run time with png_set_read_fn(), rather
323 * than changing the library.
324 */
325
326#ifdef PNG_IO_STATE_SUPPORTED
327void
328pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
329 png_uint_32 io_op);
330void
331pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
332 png_uint_32 io_op)
333{
334 png_uint_32 io_state = png_get_io_state(png_ptr);
335 int err = 0;
336
337 /* Check if the current operation (reading / writing) is as expected. */
338 if ((io_state & PNG_IO_MASK_OP) != io_op)
339 png_error(png_ptr, "Incorrect operation in I/O state");
340
341 /* Check if the buffer size specific to the current location
342 * (file signature / header / data / crc) is as expected.
343 */
344 switch (io_state & PNG_IO_MASK_LOC)
345 {
346 case PNG_IO_SIGNATURE:
347 if (data_length > 8)
348 err = 1;
349 break;
350 case PNG_IO_CHUNK_HDR:
351 if (data_length != 8)
352 err = 1;
353 break;
354 case PNG_IO_CHUNK_DATA:
355 break; /* no restrictions here */
356 case PNG_IO_CHUNK_CRC:
357 if (data_length != 4)
358 err = 1;
359 break;
360 default:
361 err = 1; /* uninitialized */
362 }
363 if (err != 0)
364 png_error(png_ptr, "Bad I/O state or buffer size");
365}
366#endif
367
368static void PNGCBAPI
369pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
370{
371 png_size_t check = 0;
372 png_voidp io_ptr;
373
374 /* fread() returns 0 on error, so it is OK to store this in a png_size_t
375 * instead of an int, which is what fread() actually returns.
376 */
377 io_ptr = png_get_io_ptr(png_ptr);
378 if (io_ptr != NULL)
379 {
380 check = fread(data, 1, length, (png_FILE_p)io_ptr);
381 }
382
383 if (check != length)
384 {
385 png_error(png_ptr, "Read Error");
386 }
387
388#ifdef PNG_IO_STATE_SUPPORTED
389 pngtest_check_io_state(png_ptr, length, PNG_IO_READING);
390#endif
391}
392
393#ifdef PNG_WRITE_FLUSH_SUPPORTED
394static void PNGCBAPI
395pngtest_flush(png_structp png_ptr)
396{
397 /* Do nothing; fflush() is said to be just a waste of energy. */
398 PNG_UNUSED(png_ptr) /* Stifle compiler warning */
399}
400#endif
401
402/* This is the function that does the actual writing of data. If you are
403 * not writing to a standard C stream, you should create a replacement
404 * write_data function and use it at run time with png_set_write_fn(), rather
405 * than changing the library.
406 */
407static void PNGCBAPI
408pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
409{
410 png_size_t check;
411
412 check = fwrite(data, 1, length, (png_FILE_p)png_get_io_ptr(png_ptr));
413
414 if (check != length)
415 {
416 png_error(png_ptr, "Write Error");
417 }
418
419#ifdef PNG_IO_STATE_SUPPORTED
420 pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING);
421#endif
422}
423#endif /* !STDIO */
424
425/* This function is called when there is a warning, but the library thinks
426 * it can continue anyway. Replacement functions don't have to do anything
427 * here if you don't want to. In the default configuration, png_ptr is
428 * not used, but it is passed in case it may be useful.
429 */
430typedef struct
431{
432 PNG_CONST char *file_name;
433} pngtest_error_parameters;
434
435static void PNGCBAPI
436pngtest_warning(png_structp png_ptr, png_const_charp message)
437{
438 PNG_CONST char *name = "UNKNOWN (ERROR!)";
439 pngtest_error_parameters *test =
440 (pngtest_error_parameters*)png_get_error_ptr(png_ptr);
441
442 ++warning_count;
443
444 if (test != NULL && test->file_name != NULL)
445 name = test->file_name;
446
447 fprintf(STDERR, "%s: libpng warning: %s\n", name, message);
448}
449
450/* This is the default error handling function. Note that replacements for
451 * this function MUST NOT RETURN, or the program will likely crash. This
452 * function is used by default, or if the program supplies NULL for the
453 * error function pointer in png_set_error_fn().
454 */
455static void PNGCBAPI
456pngtest_error(png_structp png_ptr, png_const_charp message)
457{
458 ++error_count;
459
460 pngtest_warning(png_ptr, message);
461 /* We can return because png_error calls the default handler, which is
462 * actually OK in this case.
463 */
464}
465
466/* END of code to validate stdio-free compilation */
467
468/* START of code to validate memory allocation and deallocation */
469#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
470
471/* Allocate memory. For reasonable files, size should never exceed
472 * 64K. However, zlib may allocate more then 64K if you don't tell
473 * it not to. See zconf.h and png.h for more information. zlib does
474 * need to allocate exactly 64K, so whatever you call here must
475 * have the ability to do that.
476 *
477 * This piece of code can be compiled to validate max 64K allocations
478 * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K.
479 */
480typedef struct memory_information
481{
482 png_alloc_size_t size;
483 png_voidp pointer;
484 struct memory_information *next;
485} memory_information;
486typedef memory_information *memory_infop;
487
488static memory_infop pinformation = NULL;
489static int current_allocation = 0;
490static int maximum_allocation = 0;
491static int total_allocation = 0;
492static int num_allocations = 0;
493
494png_voidp PNGCBAPI png_debug_malloc PNGARG((png_structp png_ptr,
495 png_alloc_size_t size));
496void PNGCBAPI png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr));
497
498png_voidp
499PNGCBAPI png_debug_malloc(png_structp png_ptr, png_alloc_size_t size)
500{
501
502 /* png_malloc has already tested for NULL; png_create_struct calls
503 * png_debug_malloc directly, with png_ptr == NULL which is OK
504 */
505
506 if (size == 0)
507 return (NULL);
508
509 /* This calls the library allocator twice, once to get the requested
510 buffer and once to get a new free list entry. */
511 {
512 /* Disable malloc_fn and free_fn */
513 memory_infop pinfo;
514 png_set_mem_fn(png_ptr, NULL, NULL, NULL);
515 pinfo = (memory_infop)png_malloc(png_ptr,
516 (sizeof *pinfo));
517 pinfo->size = size;
518 current_allocation += size;
519 total_allocation += size;
520 num_allocations ++;
521
522 if (current_allocation > maximum_allocation)
523 maximum_allocation = current_allocation;
524
525 pinfo->pointer = png_malloc(png_ptr, size);
526 /* Restore malloc_fn and free_fn */
527
528 png_set_mem_fn(png_ptr,
529 NULL, png_debug_malloc, png_debug_free);
530
531 if (size != 0 && pinfo->pointer == NULL)
532 {
533 current_allocation -= size;
534 total_allocation -= size;
535 png_error(png_ptr,
536 "out of memory in pngtest->png_debug_malloc");
537 }
538
539 pinfo->next = pinformation;
540 pinformation = pinfo;
541 /* Make sure the caller isn't assuming zeroed memory. */
542 memset(pinfo->pointer, 0xdd, pinfo->size);
543
544 if (verbose != 0)
545 printf("png_malloc %lu bytes at %p\n", (unsigned long)size,
546 pinfo->pointer);
547
548 return (png_voidp)(pinfo->pointer);
549 }
550}
551
552/* Free a pointer. It is removed from the list at the same time. */
553void PNGCBAPI
554png_debug_free(png_structp png_ptr, png_voidp ptr)
555{
556 if (png_ptr == NULL)
557 fprintf(STDERR, "NULL pointer to png_debug_free.\n");
558
559 if (ptr == 0)
560 {
561#if 0 /* This happens all the time. */
562 fprintf(STDERR, "WARNING: freeing NULL pointer\n");
563#endif
564 return;
565 }
566
567 /* Unlink the element from the list. */
568 {
569 memory_infop *ppinfo = &pinformation;
570
571 for (;;)
572 {
573 memory_infop pinfo = *ppinfo;
574
575 if (pinfo->pointer == ptr)
576 {
577 *ppinfo = pinfo->next;
578 current_allocation -= pinfo->size;
579 if (current_allocation < 0)
580 fprintf(STDERR, "Duplicate free of memory\n");
581 /* We must free the list element too, but first kill
582 the memory that is to be freed. */
583 memset(ptr, 0x55, pinfo->size);
584 if (pinfo != NULL)
585 free(pinfo);
586 pinfo = NULL;
587 break;
588 }
589
590 if (pinfo->next == NULL)
591 {
592 fprintf(STDERR, "Pointer %p not found\n", ptr);
593 break;
594 }
595
596 ppinfo = &pinfo->next;
597 }
598 }
599
600 /* Finally free the data. */
601 if (verbose != 0)
602 printf("Freeing %p\n", ptr);
603
604 if (ptr != NULL)
605 free(ptr);
606 ptr = NULL;
607}
608#endif /* USER_MEM && DEBUG */
609/* END of code to test memory allocation/deallocation */
610
611
612#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
613/* Demonstration of user chunk support of the sTER and vpAg chunks */
614
615/* (sTER is a public chunk not yet known by libpng. vpAg is a private
616chunk used in ImageMagick to store "virtual page" size). */
617
618static struct user_chunk_data
619{
620 png_const_infop info_ptr;
621 png_uint_32 vpAg_width, vpAg_height;
622 png_byte vpAg_units;
623 png_byte sTER_mode;
624 int location[2];
625}
626user_chunk_data;
627
628/* Used for location and order; zero means nothing. */
629#define have_sTER 0x01
630#define have_vpAg 0x02
631#define before_PLTE 0x10
632#define before_IDAT 0x20
633#define after_IDAT 0x40
634
635static void
636init_callback_info(png_const_infop info_ptr)
637{
638 MEMZERO(user_chunk_data);
639 user_chunk_data.info_ptr = info_ptr;
640}
641
642static int
643set_location(png_structp png_ptr, struct user_chunk_data *data, int what)
644{
645 int location;
646
647 if ((data->location[0] & what) != 0 || (data->location[1] & what) != 0)
648 return 0; /* already have one of these */
649
650 /* Find where we are (the code below zeroes info_ptr to indicate that the
651 * chunks before the first IDAT have been read.)
652 */
653 if (data->info_ptr == NULL) /* after IDAT */
654 location = what | after_IDAT;
655
656 else if (png_get_valid(png_ptr, data->info_ptr, PNG_INFO_PLTE) != 0)
657 location = what | before_IDAT;
658
659 else
660 location = what | before_PLTE;
661
662 if (data->location[0] == 0)
663 data->location[0] = location;
664
665 else
666 data->location[1] = location;
667
668 return 1; /* handled */
669}
670
671static int PNGCBAPI
672read_user_chunk_callback(png_struct *png_ptr, png_unknown_chunkp chunk)
673{
674 struct user_chunk_data *my_user_chunk_data =
675 (struct user_chunk_data*)png_get_user_chunk_ptr(png_ptr);
676
677 if (my_user_chunk_data == NULL)
678 png_error(png_ptr, "lost user chunk pointer");
679
680 /* Return one of the following:
681 * return (-n); chunk had an error
682 * return (0); did not recognize
683 * return (n); success
684 *
685 * The unknown chunk structure contains the chunk data:
686 * png_byte name[5];
687 * png_byte *data;
688 * png_size_t size;
689 *
690 * Note that libpng has already taken care of the CRC handling.
691 */
692
693 if (chunk->name[0] == 115 && chunk->name[1] == 84 && /* s T */
694 chunk->name[2] == 69 && chunk->name[3] == 82) /* E R */
695 {
696 /* Found sTER chunk */
697 if (chunk->size != 1)
698 return (-1); /* Error return */
699
700 if (chunk->data[0] != 0 && chunk->data[0] != 1)
701 return (-1); /* Invalid mode */
702
703 if (set_location(png_ptr, my_user_chunk_data, have_sTER) != 0)
704 {
705 my_user_chunk_data->sTER_mode=chunk->data[0];
706 return (1);
707 }
708
709 else
710 return (0); /* duplicate sTER - give it to libpng */
711 }
712
713 if (chunk->name[0] != 118 || chunk->name[1] != 112 || /* v p */
714 chunk->name[2] != 65 || chunk->name[3] != 103) /* A g */
715 return (0); /* Did not recognize */
716
717 /* Found ImageMagick vpAg chunk */
718
719 if (chunk->size != 9)
720 return (-1); /* Error return */
721
722 if (set_location(png_ptr, my_user_chunk_data, have_vpAg) == 0)
723 return (0); /* duplicate vpAg */
724
725 my_user_chunk_data->vpAg_width = png_get_uint_31(png_ptr, chunk->data);
726 my_user_chunk_data->vpAg_height = png_get_uint_31(png_ptr, chunk->data + 4);
727 my_user_chunk_data->vpAg_units = chunk->data[8];
728
729 return (1);
730}
731
732#ifdef PNG_WRITE_SUPPORTED
733static void
734write_sTER_chunk(png_structp write_ptr)
735{
736 png_byte sTER[5] = {115, 84, 69, 82, '\0'};
737
738 if (verbose != 0)
739 fprintf(STDERR, "\n stereo mode = %d\n", user_chunk_data.sTER_mode);
740
741 png_write_chunk(write_ptr, sTER, &user_chunk_data.sTER_mode, 1);
742}
743
744static void
745write_vpAg_chunk(png_structp write_ptr)
746{
747 png_byte vpAg[5] = {118, 112, 65, 103, '\0'};
748
749 png_byte vpag_chunk_data[9];
750
751 if (verbose != 0)
752 fprintf(STDERR, " vpAg = %lu x %lu, units = %d\n",
753 (unsigned long)user_chunk_data.vpAg_width,
754 (unsigned long)user_chunk_data.vpAg_height,
755 user_chunk_data.vpAg_units);
756
757 png_save_uint_32(vpag_chunk_data, user_chunk_data.vpAg_width);
758 png_save_uint_32(vpag_chunk_data + 4, user_chunk_data.vpAg_height);
759 vpag_chunk_data[8] = user_chunk_data.vpAg_units;
760 png_write_chunk(write_ptr, vpAg, vpag_chunk_data, 9);
761}
762
763static void
764write_chunks(png_structp write_ptr, int location)
765{
766 int i;
767
768 /* Notice that this preserves the original chunk order, however chunks
769 * intercepted by the callback will be written *after* chunks passed to
770 * libpng. This will actually reverse a pair of sTER chunks or a pair of
771 * vpAg chunks, resulting in an error later. This is not worth worrying
772 * about - the chunks should not be duplicated!
773 */
774 for (i=0; i<2; ++i)
775 {
776 if (user_chunk_data.location[i] == (location | have_sTER))
777 write_sTER_chunk(write_ptr);
778
779 else if (user_chunk_data.location[i] == (location | have_vpAg))
780 write_vpAg_chunk(write_ptr);
781 }
782}
783#endif /* WRITE */
784#else /* !READ_USER_CHUNKS */
785# define write_chunks(pp,loc) ((void)0)
786#endif
787/* END of code to demonstrate user chunk support */
788
789/* START of code to check that libpng has the required text support; this only
790 * checks for the write support because if read support is missing the chunk
791 * will simply not be reported back to pngtest.
792 */
793#ifdef PNG_TEXT_SUPPORTED
794static void
795pngtest_check_text_support(png_const_structp png_ptr, png_textp text_ptr,
796 int num_text)
797{
798 while (num_text > 0)
799 {
800 switch (text_ptr[--num_text].compression)
801 {
802 case PNG_TEXT_COMPRESSION_NONE:
803 break;
804
805 case PNG_TEXT_COMPRESSION_zTXt:
806# ifndef PNG_WRITE_zTXt_SUPPORTED
807 ++unsupported_chunks;
808# endif
809 break;
810
811 case PNG_ITXT_COMPRESSION_NONE:
812 case PNG_ITXT_COMPRESSION_zTXt:
813# ifndef PNG_WRITE_iTXt_SUPPORTED
814 ++unsupported_chunks;
815# endif
816 break;
817
818 default:
819 /* This is an error */
820 png_error(png_ptr, "invalid text chunk compression field");
821 break;
822 }
823 }
824}
825#endif
826/* END of code to check that libpng has the required text support */
827
828/* Test one file */
829static int
830test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
831{
832 static png_FILE_p fpin;
833 static png_FILE_p fpout; /* "static" prevents setjmp corruption */
834 pngtest_error_parameters error_parameters;
835 png_structp read_ptr;
836 png_infop read_info_ptr, end_info_ptr;
837#ifdef PNG_WRITE_SUPPORTED
838 png_structp write_ptr;
839 png_infop write_info_ptr;
840 png_infop write_end_info_ptr;
841 int interlace_preserved = 1;
842#else
843 png_structp write_ptr = NULL;
844 png_infop write_info_ptr = NULL;
845 png_infop write_end_info_ptr = NULL;
846#endif
847 png_bytep row_buf;
848 png_uint_32 y;
849 png_uint_32 width, height;
850 int num_pass = 1, pass;
851 int bit_depth, color_type;
852
853 row_buf = NULL;
854 error_parameters.file_name = inname;
855
856 if ((fpin = fopen(inname, "rb")) == NULL)
857 {
858 fprintf(STDERR, "Could not find input file %s\n", inname);
859 return (1);
860 }
861
862 if ((fpout = fopen(outname, "wb")) == NULL)
863 {
864 fprintf(STDERR, "Could not open output file %s\n", outname);
865 FCLOSE(fpin);
866 return (1);
867 }
868
869 pngtest_debug("Allocating read and write structures");
870#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
871 read_ptr =
872 png_create_read_struct_2(PNG_LIBPNG_VER_STRING, NULL,
873 NULL, NULL, NULL, png_debug_malloc, png_debug_free);
874#else
875 read_ptr =
876 png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
877#endif
878 png_set_error_fn(read_ptr, &error_parameters, pngtest_error,
879 pngtest_warning);
880
881#ifdef PNG_WRITE_SUPPORTED
882#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
883 write_ptr =
884 png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL,
885 NULL, NULL, NULL, png_debug_malloc, png_debug_free);
886#else
887 write_ptr =
888 png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
889#endif
890 png_set_error_fn(write_ptr, &error_parameters, pngtest_error,
891 pngtest_warning);
892#endif
893 pngtest_debug("Allocating read_info, write_info and end_info structures");
894 read_info_ptr = png_create_info_struct(read_ptr);
895 end_info_ptr = png_create_info_struct(read_ptr);
896#ifdef PNG_WRITE_SUPPORTED
897 write_info_ptr = png_create_info_struct(write_ptr);
898 write_end_info_ptr = png_create_info_struct(write_ptr);
899#endif
900
901#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
902 init_callback_info(read_info_ptr);
903 png_set_read_user_chunk_fn(read_ptr, &user_chunk_data,
904 read_user_chunk_callback);
905#endif
906
907#ifdef PNG_SETJMP_SUPPORTED
908 pngtest_debug("Setting jmpbuf for read struct");
909 if (setjmp(png_jmpbuf(read_ptr)))
910 {
911 fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
912 png_free(read_ptr, row_buf);
913 row_buf = NULL;
914 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
915#ifdef PNG_WRITE_SUPPORTED
916 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
917 png_destroy_write_struct(&write_ptr, &write_info_ptr);
918#endif
919 FCLOSE(fpin);
920 FCLOSE(fpout);
921 return (1);
922 }
923
924#ifdef PNG_WRITE_SUPPORTED
925 pngtest_debug("Setting jmpbuf for write struct");
926
927 if (setjmp(png_jmpbuf(write_ptr)))
928 {
929 fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
930 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
931 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
932#ifdef PNG_WRITE_SUPPORTED
933 png_destroy_write_struct(&write_ptr, &write_info_ptr);
934#endif
935 FCLOSE(fpin);
936 FCLOSE(fpout);
937 return (1);
938 }
939#endif
940#endif
941
942 if (strict != 0)
943 {
944 /* Treat png_benign_error() as errors on read */
945 png_set_benign_errors(read_ptr, 0);
946
947#ifdef PNG_WRITE_SUPPORTED
948 /* Treat them as errors on write */
949 png_set_benign_errors(write_ptr, 0);
950#endif
951
952 /* if strict is not set, then app warnings and errors are treated as
953 * warnings in release builds, but not in unstable builds; this can be
954 * changed with '--relaxed'.
955 */
956 }
957
958 else if (relaxed != 0)
959 {
960 /* Allow application (pngtest) errors and warnings to pass */
961 png_set_benign_errors(read_ptr, 1);
962
963#ifdef PNG_WRITE_SUPPORTED
964 png_set_benign_errors(write_ptr, 1);
965#endif
966 }
967
968 pngtest_debug("Initializing input and output streams");
969#ifdef PNG_STDIO_SUPPORTED
970 png_init_io(read_ptr, fpin);
971# ifdef PNG_WRITE_SUPPORTED
972 png_init_io(write_ptr, fpout);
973# endif
974#else
975 png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data);
976# ifdef PNG_WRITE_SUPPORTED
977 png_set_write_fn(write_ptr, (png_voidp)fpout, pngtest_write_data,
978# ifdef PNG_WRITE_FLUSH_SUPPORTED
979 pngtest_flush);
980# else
981 NULL);
982# endif
983# endif
984#endif
985
986 if (status_dots_requested == 1)
987 {
988#ifdef PNG_WRITE_SUPPORTED
989 png_set_write_status_fn(write_ptr, write_row_callback);
990#endif
991 png_set_read_status_fn(read_ptr, read_row_callback);
992 }
993
994 else
995 {
996#ifdef PNG_WRITE_SUPPORTED
997 png_set_write_status_fn(write_ptr, NULL);
998#endif
999 png_set_read_status_fn(read_ptr, NULL);
1000 }
1001
1002#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1003 {
1004 int i;
1005
1006 for (i = 0; i<256; i++)
1007 filters_used[i] = 0;
1008
1009 png_set_read_user_transform_fn(read_ptr, count_filters);
1010 }
1011#endif
1012#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1013 zero_samples = 0;
1014 png_set_write_user_transform_fn(write_ptr, count_zero_samples);
1015#endif
1016
1017#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
1018 /* Preserve all the unknown chunks, if possible. If this is disabled then,
1019 * even if the png_{get,set}_unknown_chunks stuff is enabled, we can't use
1020 * libpng to *save* the unknown chunks on read (because we can't switch the
1021 * save option on!)
1022 *
1023 * Notice that if SET_UNKNOWN_CHUNKS is *not* supported read will discard all
1024 * unknown chunks and write will write them all.
1025 */
1026#ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
1027 png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS,
1028 NULL, 0);
1029#endif
1030#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1031 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS,
1032 NULL, 0);
1033#endif
1034#endif
1035
1036 pngtest_debug("Reading info struct");
1037 png_read_info(read_ptr, read_info_ptr);
1038
1039#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1040 /* This is a bit of a hack; there is no obvious way in the callback function
1041 * to determine that the chunks before the first IDAT have been read, so
1042 * remove the info_ptr (which is only used to determine position relative to
1043 * PLTE) here to indicate that we are after the IDAT.
1044 */
1045 user_chunk_data.info_ptr = NULL;
1046#endif
1047
1048 pngtest_debug("Transferring info struct");
1049 {
1050 int interlace_type, compression_type, filter_type;
1051
1052 if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth,
1053 &color_type, &interlace_type, &compression_type, &filter_type) != 0)
1054 {
1055 png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth,
1056 color_type, interlace_type, compression_type, filter_type);
1057#ifndef PNG_READ_INTERLACING_SUPPORTED
1058 /* num_pass will not be set below, set it here if the image is
1059 * interlaced: what happens is that write interlacing is *not* turned
1060 * on an the partial interlaced rows are written directly.
1061 */
1062 switch (interlace_type)
1063 {
1064 case PNG_INTERLACE_NONE:
1065 num_pass = 1;
1066 break;
1067
1068 case PNG_INTERLACE_ADAM7:
1069 num_pass = 7;
1070 break;
1071
1072 default:
1073 png_error(read_ptr, "invalid interlace type");
1074 /*NOT REACHED*/
1075 }
1076#endif
1077 }
1078 }
1079#ifdef PNG_FIXED_POINT_SUPPORTED
1080#ifdef PNG_cHRM_SUPPORTED
1081 {
1082 png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
1083 blue_y;
1084
1085 if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y,
1086 &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y) != 0)
1087 {
1088 png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x,
1089 red_y, green_x, green_y, blue_x, blue_y);
1090 }
1091 }
1092#endif
1093#ifdef PNG_gAMA_SUPPORTED
1094 {
1095 png_fixed_point gamma;
1096
1097 if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma) != 0)
1098 png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma);
1099 }
1100#endif
1101#else /* Use floating point versions */
1102#ifdef PNG_FLOATING_POINT_SUPPORTED
1103#ifdef PNG_cHRM_SUPPORTED
1104 {
1105 double white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
1106 blue_y;
1107
1108 if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
1109 &red_y, &green_x, &green_y, &blue_x, &blue_y) != 0)
1110 {
1111 png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x,
1112 red_y, green_x, green_y, blue_x, blue_y);
1113 }
1114 }
1115#endif
1116#ifdef PNG_gAMA_SUPPORTED
1117 {
1118 double gamma;
1119
1120 if (png_get_gAMA(read_ptr, read_info_ptr, &gamma) != 0)
1121 png_set_gAMA(write_ptr, write_info_ptr, gamma);
1122 }
1123#endif
1124#endif /* Floating point */
1125#endif /* Fixed point */
1126#ifdef PNG_iCCP_SUPPORTED
1127 {
1128 png_charp name;
1129 png_bytep profile;
1130 png_uint_32 proflen;
1131 int compression_type;
1132
1133 if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type,
1134 &profile, &proflen) != 0)
1135 {
1136 png_set_iCCP(write_ptr, write_info_ptr, name, compression_type,
1137 profile, proflen);
1138 }
1139 }
1140#endif
1141#ifdef PNG_sRGB_SUPPORTED
1142 {
1143 int intent;
1144
1145 if (png_get_sRGB(read_ptr, read_info_ptr, &intent) != 0)
1146 png_set_sRGB(write_ptr, write_info_ptr, intent);
1147 }
1148#endif
1149 {
1150 png_colorp palette;
1151 int num_palette;
1152
1153 if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette) != 0)
1154 png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
1155 }
1156#ifdef PNG_bKGD_SUPPORTED
1157 {
1158 png_color_16p background;
1159
1160 if (png_get_bKGD(read_ptr, read_info_ptr, &background) != 0)
1161 {
1162 png_set_bKGD(write_ptr, write_info_ptr, background);
1163 }
1164 }
1165#endif
1166#ifdef PNG_hIST_SUPPORTED
1167 {
1168 png_uint_16p hist;
1169
1170 if (png_get_hIST(read_ptr, read_info_ptr, &hist) != 0)
1171 png_set_hIST(write_ptr, write_info_ptr, hist);
1172 }
1173#endif
1174#ifdef PNG_oFFs_SUPPORTED
1175 {
1176 png_int_32 offset_x, offset_y;
1177 int unit_type;
1178
1179 if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y,
1180 &unit_type) != 0)
1181 {
1182 png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
1183 }
1184 }
1185#endif
1186#ifdef PNG_pCAL_SUPPORTED
1187 {
1188 png_charp purpose, units;
1189 png_charpp params;
1190 png_int_32 X0, X1;
1191 int type, nparams;
1192
1193 if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type,
1194 &nparams, &units, &params) != 0)
1195 {
1196 png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type,
1197 nparams, units, params);
1198 }
1199 }
1200#endif
1201#ifdef PNG_pHYs_SUPPORTED
1202 {
1203 png_uint_32 res_x, res_y;
1204 int unit_type;
1205
1206 if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y,
1207 &unit_type) != 0)
1208 png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type);
1209 }
1210#endif
1211#ifdef PNG_sBIT_SUPPORTED
1212 {
1213 png_color_8p sig_bit;
1214
1215 if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit) != 0)
1216 png_set_sBIT(write_ptr, write_info_ptr, sig_bit);
1217 }
1218#endif
1219#ifdef PNG_sCAL_SUPPORTED
1220#if defined(PNG_FLOATING_POINT_SUPPORTED) && \
1221 defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
1222 {
1223 int unit;
1224 double scal_width, scal_height;
1225
1226 if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width,
1227 &scal_height) != 0)
1228 {
1229 png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height);
1230 }
1231 }
1232#else
1233#ifdef PNG_FIXED_POINT_SUPPORTED
1234 {
1235 int unit;
1236 png_charp scal_width, scal_height;
1237
1238 if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width,
1239 &scal_height) != 0)
1240 {
1241 png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width,
1242 scal_height);
1243 }
1244 }
1245#endif
1246#endif
1247#endif
1248#ifdef PNG_TEXT_SUPPORTED
1249 {
1250 png_textp text_ptr;
1251 int num_text;
1252
1253 if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
1254 {
1255 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1256
1257 pngtest_check_text_support(read_ptr, text_ptr, num_text);
1258
1259 if (verbose != 0)
1260 {
1261 int i;
1262
1263 printf("\n");
1264 for (i=0; i<num_text; i++)
1265 {
1266 printf(" Text compression[%d]=%d\n",
1267 i, text_ptr[i].compression);
1268 }
1269 }
1270
1271 png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
1272 }
1273 }
1274#endif
1275#ifdef PNG_tIME_SUPPORTED
1276 {
1277 png_timep mod_time;
1278
1279 if (png_get_tIME(read_ptr, read_info_ptr, &mod_time) != 0)
1280 {
1281 png_set_tIME(write_ptr, write_info_ptr, mod_time);
1282#ifdef PNG_TIME_RFC1123_SUPPORTED
1283 if (png_convert_to_rfc1123_buffer(tIME_string, mod_time) != 0)
1284 tIME_string[(sizeof tIME_string) - 1] = '\0';
1285
1286 else
1287 {
1288 strncpy(tIME_string, "*** invalid time ***", (sizeof tIME_string));
1289 tIME_string[(sizeof tIME_string) - 1] = '\0';
1290 }
1291
1292 tIME_chunk_present++;
1293#endif /* TIME_RFC1123 */
1294 }
1295 }
1296#endif
1297#ifdef PNG_tRNS_SUPPORTED
1298 {
1299 png_bytep trans_alpha;
1300 int num_trans;
1301 png_color_16p trans_color;
1302
1303 if (png_get_tRNS(read_ptr, read_info_ptr, &trans_alpha, &num_trans,
1304 &trans_color) != 0)
1305 {
1306 int sample_max = (1 << bit_depth);
1307 /* libpng doesn't reject a tRNS chunk with out-of-range samples */
1308 if (!((color_type == PNG_COLOR_TYPE_GRAY &&
1309 (int)trans_color->gray > sample_max) ||
1310 (color_type == PNG_COLOR_TYPE_RGB &&
1311 ((int)trans_color->red > sample_max ||
1312 (int)trans_color->green > sample_max ||
1313 (int)trans_color->blue > sample_max))))
1314 png_set_tRNS(write_ptr, write_info_ptr, trans_alpha, num_trans,
1315 trans_color);
1316 }
1317 }
1318#endif
1319#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1320 {
1321 png_unknown_chunkp unknowns;
1322 int num_unknowns = png_get_unknown_chunks(read_ptr, read_info_ptr,
1323 &unknowns);
1324
1325 if (num_unknowns != 0)
1326 {
1327 png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns,
1328 num_unknowns);
1329#if PNG_LIBPNG_VER < 10600
1330 /* Copy the locations from the read_info_ptr. The automatically
1331 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1332 * because they are reset from the write pointer (removed in 1.6.0).
1333 */
1334 {
1335 int i;
1336 for (i = 0; i < num_unknowns; i++)
1337 png_set_unknown_chunk_location(write_ptr, write_info_ptr, i,
1338 unknowns[i].location);
1339 }
1340#endif
1341 }
1342 }
1343#endif
1344
1345#ifdef PNG_WRITE_SUPPORTED
1346 pngtest_debug("Writing info struct");
1347
1348 /* Write the info in two steps so that if we write the 'unknown' chunks here
1349 * they go to the correct place.
1350 */
1351 png_write_info_before_PLTE(write_ptr, write_info_ptr);
1352
1353 write_chunks(write_ptr, before_PLTE); /* before PLTE */
1354
1355 png_write_info(write_ptr, write_info_ptr);
1356
1357 write_chunks(write_ptr, before_IDAT); /* after PLTE */
1358#endif
1359
1360#ifdef SINGLE_ROWBUF_ALLOC
1361 pngtest_debug("Allocating row buffer...");
1362 row_buf = (png_bytep)png_malloc(read_ptr,
1363 png_get_rowbytes(read_ptr, read_info_ptr));
1364
1365 pngtest_debug1("\t0x%08lx", (unsigned long)row_buf);
1366#endif /* SINGLE_ROWBUF_ALLOC */
1367 pngtest_debug("Writing row data");
1368
1369#ifdef PNG_READ_INTERLACING_SUPPORTED
1370 num_pass = png_set_interlace_handling(read_ptr);
1371 if (png_set_interlace_handling(write_ptr) != num_pass)
1372 png_error(write_ptr, "png_set_interlace_handling: inconsistent num_pass");
1373#endif
1374
1375#ifdef PNGTEST_TIMING
1376 t_stop = (float)clock();
1377 t_misc += (t_stop - t_start);
1378 t_start = t_stop;
1379#endif
1380 for (pass = 0; pass < num_pass; pass++)
1381 {
1382 pngtest_debug1("Writing row data for pass %d", pass);
1383 for (y = 0; y < height; y++)
1384 {
1385#ifndef SINGLE_ROWBUF_ALLOC
1386 pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y);
1387
1388 row_buf = (png_bytep)png_malloc(read_ptr,
1389 png_get_rowbytes(read_ptr, read_info_ptr));
1390
1391 pngtest_debug2("\t0x%08lx (%lu bytes)", (unsigned long)row_buf,
1392 (unsigned long)png_get_rowbytes(read_ptr, read_info_ptr));
1393
1394#endif /* !SINGLE_ROWBUF_ALLOC */
1395 png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1);
1396
1397#ifdef PNG_WRITE_SUPPORTED
1398#ifdef PNGTEST_TIMING
1399 t_stop = (float)clock();
1400 t_decode += (t_stop - t_start);
1401 t_start = t_stop;
1402#endif
1403 png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
1404#ifdef PNGTEST_TIMING
1405 t_stop = (float)clock();
1406 t_encode += (t_stop - t_start);
1407 t_start = t_stop;
1408#endif
1409#endif /* WRITE */
1410
1411#ifndef SINGLE_ROWBUF_ALLOC
1412 pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y);
1413 png_free(read_ptr, row_buf);
1414 row_buf = NULL;
1415#endif /* !SINGLE_ROWBUF_ALLOC */
1416 }
1417 }
1418
1419#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
1420# ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1421 png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1);
1422# endif
1423# ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1424 png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
1425# endif
1426#endif
1427
1428 pngtest_debug("Reading and writing end_info data");
1429
1430 png_read_end(read_ptr, end_info_ptr);
1431#ifdef PNG_TEXT_SUPPORTED
1432 {
1433 png_textp text_ptr;
1434 int num_text;
1435
1436 if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
1437 {
1438 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1439
1440 pngtest_check_text_support(read_ptr, text_ptr, num_text);
1441
1442 if (verbose != 0)
1443 {
1444 int i;
1445
1446 printf("\n");
1447 for (i=0; i<num_text; i++)
1448 {
1449 printf(" Text compression[%d]=%d\n",
1450 i, text_ptr[i].compression);
1451 }
1452 }
1453
1454 png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
1455 }
1456 }
1457#endif
1458#ifdef PNG_tIME_SUPPORTED
1459 {
1460 png_timep mod_time;
1461
1462 if (png_get_tIME(read_ptr, end_info_ptr, &mod_time) != 0)
1463 {
1464 png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
1465#ifdef PNG_TIME_RFC1123_SUPPORTED
1466 if (png_convert_to_rfc1123_buffer(tIME_string, mod_time) != 0)
1467 tIME_string[(sizeof tIME_string) - 1] = '\0';
1468
1469 else
1470 {
1471 strncpy(tIME_string, "*** invalid time ***", sizeof tIME_string);
1472 tIME_string[(sizeof tIME_string)-1] = '\0';
1473 }
1474
1475 tIME_chunk_present++;
1476#endif /* TIME_RFC1123 */
1477 }
1478 }
1479#endif
1480#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1481 {
1482 png_unknown_chunkp unknowns;
1483 int num_unknowns = png_get_unknown_chunks(read_ptr, end_info_ptr,
1484 &unknowns);
1485
1486 if (num_unknowns != 0)
1487 {
1488 png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns,
1489 num_unknowns);
1490#if PNG_LIBPNG_VER < 10600
1491 /* Copy the locations from the read_info_ptr. The automatically
1492 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1493 * because they are reset from the write pointer (removed in 1.6.0).
1494 */
1495 {
1496 int i;
1497 for (i = 0; i < num_unknowns; i++)
1498 png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i,
1499 unknowns[i].location);
1500 }
1501#endif
1502 }
1503 }
1504#endif
1505
1506#ifdef PNG_WRITE_SUPPORTED
1507#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
1508 /* Normally one would use Z_DEFAULT_STRATEGY for text compression.
1509 * This is here just to make pngtest replicate the results from libpng
1510 * versions prior to 1.5.4, and to test this new API.
1511 */
1512 png_set_text_compression_strategy(write_ptr, Z_FILTERED);
1513#endif
1514
1515 /* When the unknown vpAg/sTER chunks are written by pngtest the only way to
1516 * do it is to write them *before* calling png_write_end. When unknown
1517 * chunks are written by libpng, however, they are written just before IEND.
1518 * There seems to be no way round this, however vpAg/sTER are not expected
1519 * after IDAT.
1520 */
1521 write_chunks(write_ptr, after_IDAT);
1522
1523 png_write_end(write_ptr, write_end_info_ptr);
1524#endif
1525
1526#ifdef PNG_EASY_ACCESS_SUPPORTED
1527 if (verbose != 0)
1528 {
1529 png_uint_32 iwidth, iheight;
1530 iwidth = png_get_image_width(write_ptr, write_info_ptr);
1531 iheight = png_get_image_height(write_ptr, write_info_ptr);
1532 fprintf(STDERR, "\n Image width = %lu, height = %lu\n",
1533 (unsigned long)iwidth, (unsigned long)iheight);
1534 }
1535#endif
1536
1537 pngtest_debug("Destroying data structs");
1538#ifdef SINGLE_ROWBUF_ALLOC
1539 pngtest_debug("destroying row_buf for read_ptr");
1540 png_free(read_ptr, row_buf);
1541 row_buf = NULL;
1542#endif /* SINGLE_ROWBUF_ALLOC */
1543 pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr");
1544 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
1545#ifdef PNG_WRITE_SUPPORTED
1546 pngtest_debug("destroying write_end_info_ptr");
1547 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
1548 pngtest_debug("destroying write_ptr, write_info_ptr");
1549 png_destroy_write_struct(&write_ptr, &write_info_ptr);
1550#endif
1551 pngtest_debug("Destruction complete.");
1552
1553 FCLOSE(fpin);
1554 FCLOSE(fpout);
1555
1556 /* Summarize any warnings or errors and in 'strict' mode fail the test.
1557 * Unsupported chunks can result in warnings, in that case ignore the strict
1558 * setting, otherwise fail the test on warnings as well as errors.
1559 */
1560 if (error_count > 0)
1561 {
1562 /* We don't really expect to get here because of the setjmp handling
1563 * above, but this is safe.
1564 */
1565 fprintf(STDERR, "\n %s: %d libpng errors found (%d warnings)",
1566 inname, error_count, warning_count);
1567
1568 if (strict != 0)
1569 return (1);
1570 }
1571
1572# ifdef PNG_WRITE_SUPPORTED
1573 /* If there we no write support nothing was written! */
1574 else if (unsupported_chunks > 0)
1575 {
1576 fprintf(STDERR, "\n %s: unsupported chunks (%d)%s",
1577 inname, unsupported_chunks, strict ? ": IGNORED --strict!" : "");
1578 }
1579# endif
1580
1581 else if (warning_count > 0)
1582 {
1583 fprintf(STDERR, "\n %s: %d libpng warnings found",
1584 inname, warning_count);
1585
1586 if (strict != 0)
1587 return (1);
1588 }
1589
1590 pngtest_debug("Opening files for comparison");
1591 if ((fpin = fopen(inname, "rb")) == NULL)
1592 {
1593 fprintf(STDERR, "Could not find file %s\n", inname);
1594 return (1);
1595 }
1596
1597 if ((fpout = fopen(outname, "rb")) == NULL)
1598 {
1599 fprintf(STDERR, "Could not find file %s\n", outname);
1600 FCLOSE(fpin);
1601 return (1);
1602 }
1603
1604#ifdef PNG_WRITE_SUPPORTED /* else nothing was written */
1605 if (interlace_preserved != 0) /* else the files will be changed */
1606 {
1607 for (;;)
1608 {
1609 static int wrote_question = 0;
1610 png_size_t num_in, num_out;
1611 char inbuf[256], outbuf[256];
1612
1613 num_in = fread(inbuf, 1, sizeof inbuf, fpin);
1614 num_out = fread(outbuf, 1, sizeof outbuf, fpout);
1615
1616 if (num_in != num_out)
1617 {
1618 fprintf(STDERR, "\nFiles %s and %s are of a different size\n",
1619 inname, outname);
1620
1621 if (wrote_question == 0 && unsupported_chunks == 0)
1622 {
1623 fprintf(STDERR,
1624 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1625 inname, PNG_ZBUF_SIZE);
1626 fprintf(STDERR,
1627 "\n filtering heuristic (libpng default), compression");
1628 fprintf(STDERR,
1629 " level (zlib default),\n and zlib version (%s)?\n\n",
1630 ZLIB_VERSION);
1631 wrote_question = 1;
1632 }
1633
1634 FCLOSE(fpin);
1635 FCLOSE(fpout);
1636
1637 if (strict != 0 && unsupported_chunks == 0)
1638 return (1);
1639
1640 else
1641 return (0);
1642 }
1643
1644 if (num_in == 0)
1645 break;
1646
1647 if (memcmp(inbuf, outbuf, num_in))
1648 {
1649 fprintf(STDERR, "\nFiles %s and %s are different\n", inname,
1650 outname);
1651
1652 if (wrote_question == 0 && unsupported_chunks == 0)
1653 {
1654 fprintf(STDERR,
1655 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1656 inname, PNG_ZBUF_SIZE);
1657 fprintf(STDERR,
1658 "\n filtering heuristic (libpng default), compression");
1659 fprintf(STDERR,
1660 " level (zlib default),\n and zlib version (%s)?\n\n",
1661 ZLIB_VERSION);
1662 wrote_question = 1;
1663 }
1664
1665 FCLOSE(fpin);
1666 FCLOSE(fpout);
1667
1668 /* NOTE: the unsupported_chunks escape is permitted here because
1669 * unsupported text chunk compression will result in the compression
1670 * mode being changed (to NONE) yet, in the test case, the result
1671 * can be exactly the same size!
1672 */
1673 if (strict != 0 && unsupported_chunks == 0)
1674 return (1);
1675
1676 else
1677 return (0);
1678 }
1679 }
1680 }
1681#endif /* WRITE */
1682
1683 FCLOSE(fpin);
1684 FCLOSE(fpout);
1685
1686 return (0);
1687}
1688
1689/* Input and output filenames */
1690#ifdef RISCOS
1691static PNG_CONST char *inname = "pngtest/png";
1692static PNG_CONST char *outname = "pngout/png";
1693#else
1694static PNG_CONST char *inname = "pngtest.png";
1695static PNG_CONST char *outname = "pngout.png";
1696#endif
1697
1698int
1699main(int argc, char *argv[])
1700{
1701 int multiple = 0;
1702 int ierror = 0;
1703
1704 fprintf(STDERR, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
1705 fprintf(STDERR, " with zlib version %s\n", ZLIB_VERSION);
1706 fprintf(STDERR, "%s", png_get_copyright(NULL));
1707 /* Show the version of libpng used in building the library */
1708 fprintf(STDERR, " library (%lu):%s",
1709 (unsigned long)png_access_version_number(),
1710 png_get_header_version(NULL));
1711
1712 /* Show the version of libpng used in building the application */
1713 fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
1714 PNG_HEADER_VERSION_STRING);
1715
1716 /* Do some consistency checking on the memory allocation settings, I'm
1717 * not sure this matters, but it is nice to know, the first of these
1718 * tests should be impossible because of the way the macros are set
1719 * in pngconf.h
1720 */
1721#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1722 fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n");
1723#endif
1724 /* I think the following can happen. */
1725#if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1726 fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n");
1727#endif
1728
1729 if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING))
1730 {
1731 fprintf(STDERR,
1732 "Warning: versions are different between png.h and png.c\n");
1733 fprintf(STDERR, " png.h version: %s\n", PNG_LIBPNG_VER_STRING);
1734 fprintf(STDERR, " png.c version: %s\n\n", png_libpng_ver);
1735 ++ierror;
1736 }
1737
1738 if (argc > 1)
1739 {
1740 if (strcmp(argv[1], "-m") == 0)
1741 {
1742 multiple = 1;
1743 status_dots_requested = 0;
1744 }
1745
1746 else if (strcmp(argv[1], "-mv") == 0 ||
1747 strcmp(argv[1], "-vm") == 0 )
1748 {
1749 multiple = 1;
1750 verbose = 1;
1751 status_dots_requested = 1;
1752 }
1753
1754 else if (strcmp(argv[1], "-v") == 0)
1755 {
1756 verbose = 1;
1757 status_dots_requested = 1;
1758 inname = argv[2];
1759 }
1760
1761 else if (strcmp(argv[1], "--strict") == 0)
1762 {
1763 status_dots_requested = 0;
1764 verbose = 1;
1765 inname = argv[2];
1766 strict++;
1767 relaxed = 0;
1768 }
1769
1770 else if (strcmp(argv[1], "--relaxed") == 0)
1771 {
1772 status_dots_requested = 0;
1773 verbose = 1;
1774 inname = argv[2];
1775 strict = 0;
1776 relaxed++;
1777 }
1778
1779 else
1780 {
1781 inname = argv[1];
1782 status_dots_requested = 0;
1783 }
1784 }
1785
1786 if (multiple == 0 && argc == 3 + verbose)
1787 outname = argv[2 + verbose];
1788
1789 if ((multiple == 0 && argc > 3 + verbose) ||
1790 (multiple != 0 && argc < 2))
1791 {
1792 fprintf(STDERR,
1793 "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
1794 argv[0], argv[0]);
1795 fprintf(STDERR,
1796 " reads/writes one PNG file (without -m) or multiple files (-m)\n");
1797 fprintf(STDERR,
1798 " with -m %s is used as a temporary file\n", outname);
1799 exit(1);
1800 }
1801
1802 if (multiple != 0)
1803 {
1804 int i;
1805#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1806 int allocation_now = current_allocation;
1807#endif
1808 for (i=2; i<argc; ++i)
1809 {
1810 int kerror;
1811 fprintf(STDERR, "\n Testing %s:", argv[i]);
1812#if PNG_DEBUG > 0
1813 fprintf(STDERR, "\n");
1814#endif
1815 kerror = test_one_file(argv[i], outname);
1816 if (kerror == 0)
1817 {
1818#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1819 int k;
1820#endif
1821#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1822 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1823 (unsigned long)zero_samples);
1824#else
1825 fprintf(STDERR, " PASS\n");
1826#endif
1827#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1828 for (k = 0; k<256; k++)
1829 if (filters_used[k] != 0)
1830 fprintf(STDERR, " Filter %d was used %lu times\n",
1831 k, (unsigned long)filters_used[k]);
1832#endif
1833#ifdef PNG_TIME_RFC1123_SUPPORTED
1834 if (tIME_chunk_present != 0)
1835 fprintf(STDERR, " tIME = %s\n", tIME_string);
1836
1837 tIME_chunk_present = 0;
1838#endif /* TIME_RFC1123 */
1839 }
1840
1841 else
1842 {
1843 fprintf(STDERR, " FAIL\n");
1844 ierror += kerror;
1845 }
1846#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1847 if (allocation_now != current_allocation)
1848 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1849 current_allocation - allocation_now);
1850
1851 if (current_allocation != 0)
1852 {
1853 memory_infop pinfo = pinformation;
1854
1855 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1856 current_allocation);
1857
1858 while (pinfo != NULL)
1859 {
1860 fprintf(STDERR, " %lu bytes at %p\n",
1861 (unsigned long)pinfo->size,
1862 pinfo->pointer);
1863 pinfo = pinfo->next;
1864 }
1865 }
1866#endif
1867 }
1868#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1869 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1870 current_allocation);
1871 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1872 maximum_allocation);
1873 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1874 total_allocation);
1875 fprintf(STDERR, " Number of allocations: %10d\n",
1876 num_allocations);
1877#endif
1878 }
1879
1880 else
1881 {
1882 int i;
1883 for (i = 0; i<3; ++i)
1884 {
1885 int kerror;
1886#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1887 int allocation_now = current_allocation;
1888#endif
1889 if (i == 1)
1890 status_dots_requested = 1;
1891
1892 else if (verbose == 0)
1893 status_dots_requested = 0;
1894
1895 if (i == 0 || verbose == 1 || ierror != 0)
1896 {
1897 fprintf(STDERR, "\n Testing %s:", inname);
1898#if PNG_DEBUG > 0
1899 fprintf(STDERR, "\n");
1900#endif
1901 }
1902
1903 kerror = test_one_file(inname, outname);
1904
1905 if (kerror == 0)
1906 {
1907 if (verbose == 1 || i == 2)
1908 {
1909#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1910 int k;
1911#endif
1912#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1913 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1914 (unsigned long)zero_samples);
1915#else
1916 fprintf(STDERR, " PASS\n");
1917#endif
1918#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1919 for (k = 0; k<256; k++)
1920 if (filters_used[k] != 0)
1921 fprintf(STDERR, " Filter %d was used %lu times\n",
1922 k, (unsigned long)filters_used[k]);
1923#endif
1924#ifdef PNG_TIME_RFC1123_SUPPORTED
1925 if (tIME_chunk_present != 0)
1926 fprintf(STDERR, " tIME = %s\n", tIME_string);
1927#endif /* TIME_RFC1123 */
1928 }
1929 }
1930
1931 else
1932 {
1933 if (verbose == 0 && i != 2)
1934 {
1935 fprintf(STDERR, "\n Testing %s:", inname);
1936#if PNG_DEBUG > 0
1937 fprintf(STDERR, "\n");
1938#endif
1939 }
1940
1941 fprintf(STDERR, " FAIL\n");
1942 ierror += kerror;
1943 }
1944#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1945 if (allocation_now != current_allocation)
1946 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1947 current_allocation - allocation_now);
1948
1949 if (current_allocation != 0)
1950 {
1951 memory_infop pinfo = pinformation;
1952
1953 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1954 current_allocation);
1955
1956 while (pinfo != NULL)
1957 {
1958 fprintf(STDERR, " %lu bytes at %p\n",
1959 (unsigned long)pinfo->size, pinfo->pointer);
1960 pinfo = pinfo->next;
1961 }
1962 }
1963#endif
1964 }
1965#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1966 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1967 current_allocation);
1968 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1969 maximum_allocation);
1970 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1971 total_allocation);
1972 fprintf(STDERR, " Number of allocations: %10d\n",
1973 num_allocations);
1974#endif
1975 }
1976
1977#ifdef PNGTEST_TIMING
1978 t_stop = (float)clock();
1979 t_misc += (t_stop - t_start);
1980 t_start = t_stop;
1981 fprintf(STDERR, " CPU time used = %.3f seconds",
1982 (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC);
1983 fprintf(STDERR, " (decoding %.3f,\n",
1984 t_decode/(float)CLOCKS_PER_SEC);
1985 fprintf(STDERR, " encoding %.3f ,",
1986 t_encode/(float)CLOCKS_PER_SEC);
1987 fprintf(STDERR, " other %.3f seconds)\n\n",
1988 t_misc/(float)CLOCKS_PER_SEC);
1989#endif
1990
1991 if (ierror == 0)
1992 fprintf(STDERR, " libpng passes test\n");
1993
1994 else
1995 fprintf(STDERR, " libpng FAILS test\n");
1996
1997 return (int)(ierror != 0);
1998}
1999#else
2000int
2001main(void)
2002{
2003 fprintf(STDERR,
2004 " test ignored because libpng was not built with read support\n");
2005 /* And skip this test */
2006 return PNG_LIBPNG_VER < 10600 ? 0 : 77;
2007}
2008#endif
2009
2010/* Generate a compiler error if there is an old png.h in the search path. */
2011typedef png_libpng_version_1_6_16 Your_png_h_is_not_version_1_6_16;
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