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1
2/* pngtest.c - a simple test program to test libpng
3 *
4 * Last changed in libpng 1.5.6 [November 3, 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#define _POSIX_SOURCE 1
35
36#include "zlib.h"
37#include "png.h"
38/* Copied from pngpriv.h but only used in error messages below. */
39#ifndef PNG_ZBUF_SIZE
40# define PNG_ZBUF_SIZE 8192
41#endif
42# include <stdio.h>
43# include <stdlib.h>
44# include <string.h>
45# define FCLOSE(file) fclose(file)
46
47#ifndef PNG_STDIO_SUPPORTED
48typedef FILE * png_FILE_p;
49#endif
50
51/* Makes pngtest verbose so we can find problems. */
52#ifndef PNG_DEBUG
53# define PNG_DEBUG 0
54#endif
55
56#if PNG_DEBUG > 1
57# define pngtest_debug(m) ((void)fprintf(stderr, m "\n"))
58# define pngtest_debug1(m,p1) ((void)fprintf(stderr, m "\n", p1))
59# define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2))
60#else
61# define pngtest_debug(m) ((void)0)
62# define pngtest_debug1(m,p1) ((void)0)
63# define pngtest_debug2(m,p1,p2) ((void)0)
64#endif
65
66#if !PNG_DEBUG
67# define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */
68#endif
69
70/* The code uses memcmp and memcpy on large objects (typically row pointers) so
71 * it is necessary to do soemthing special on certain architectures, note that
72 * the actual support for this was effectively removed in 1.4, so only the
73 * memory remains in this program:
74 */
75#define CVT_PTR(ptr) (ptr)
76#define CVT_PTR_NOCHECK(ptr) (ptr)
77#define png_memcmp memcmp
78#define png_memcpy memcpy
79#define png_memset memset
80
81/* Turn on CPU timing
82#define PNGTEST_TIMING
83*/
84
85#ifndef PNG_FLOATING_POINT_SUPPORTED
86#undef PNGTEST_TIMING
87#endif
88
89#ifdef PNGTEST_TIMING
90static float t_start, t_stop, t_decode, t_encode, t_misc;
91#include <time.h>
92#endif
93
94#ifdef PNG_TIME_RFC1123_SUPPORTED
95#define PNG_tIME_STRING_LENGTH 29
96static int tIME_chunk_present = 0;
97static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present";
98#endif
99
100static int verbose = 0;
101static int strict = 0;
102
103int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname));
104
105#ifdef __TURBOC__
106#include <mem.h>
107#endif
108
109/* Defined so I can write to a file on gui/windowing platforms */
110/* #define STDERR stderr */
111#define STDERR stdout /* For DOS */
112
113/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
114#ifndef png_jmpbuf
115# define png_jmpbuf(png_ptr) png_ptr->jmpbuf
116#endif
117
118/* Example of using row callbacks to make a simple progress meter */
119static int status_pass = 1;
120static int status_dots_requested = 0;
121static int status_dots = 1;
122
123void PNGCBAPI
124read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
125void PNGCBAPI
126read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
127{
128 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX)
129 return;
130
131 if (status_pass != pass)
132 {
133 fprintf(stdout, "\n Pass %d: ", pass);
134 status_pass = pass;
135 status_dots = 31;
136 }
137
138 status_dots--;
139
140 if (status_dots == 0)
141 {
142 fprintf(stdout, "\n ");
143 status_dots=30;
144 }
145
146 fprintf(stdout, "r");
147}
148
149void PNGCBAPI
150write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
151void PNGCBAPI
152write_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 || pass > 7)
155 return;
156
157 fprintf(stdout, "w");
158}
159
160
161#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
162/* Example of using user transform callback (we don't transform anything,
163 * but merely examine the row filters. We set this to 256 rather than
164 * 5 in case illegal filter values are present.)
165 */
166static png_uint_32 filters_used[256];
167void PNGCBAPI
168count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data);
169void PNGCBAPI
170count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data)
171{
172 if (png_ptr != NULL && row_info != NULL)
173 ++filters_used[*(data - 1)];
174}
175#endif
176
177#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
178/* Example of using user transform callback (we don't transform anything,
179 * but merely count the zero samples)
180 */
181
182static png_uint_32 zero_samples;
183
184void PNGCBAPI
185count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data);
186void PNGCBAPI
187count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
188{
189 png_bytep dp = data;
190 if (png_ptr == NULL)
191 return;
192
193 /* Contents of row_info:
194 * png_uint_32 width width of row
195 * png_uint_32 rowbytes number of bytes in row
196 * png_byte color_type color type of pixels
197 * png_byte bit_depth bit depth of samples
198 * png_byte channels number of channels (1-4)
199 * png_byte pixel_depth bits per pixel (depth*channels)
200 */
201
202 /* Counts the number of zero samples (or zero pixels if color_type is 3 */
203
204 if (row_info->color_type == 0 || row_info->color_type == 3)
205 {
206 int pos = 0;
207 png_uint_32 n, nstop;
208
209 for (n = 0, nstop=row_info->width; n<nstop; n++)
210 {
211 if (row_info->bit_depth == 1)
212 {
213 if (((*dp << pos++ ) & 0x80) == 0)
214 zero_samples++;
215
216 if (pos == 8)
217 {
218 pos = 0;
219 dp++;
220 }
221 }
222
223 if (row_info->bit_depth == 2)
224 {
225 if (((*dp << (pos+=2)) & 0xc0) == 0)
226 zero_samples++;
227
228 if (pos == 8)
229 {
230 pos = 0;
231 dp++;
232 }
233 }
234
235 if (row_info->bit_depth == 4)
236 {
237 if (((*dp << (pos+=4)) & 0xf0) == 0)
238 zero_samples++;
239
240 if (pos == 8)
241 {
242 pos = 0;
243 dp++;
244 }
245 }
246
247 if (row_info->bit_depth == 8)
248 if (*dp++ == 0)
249 zero_samples++;
250
251 if (row_info->bit_depth == 16)
252 {
253 if ((*dp | *(dp+1)) == 0)
254 zero_samples++;
255 dp+=2;
256 }
257 }
258 }
259 else /* Other color types */
260 {
261 png_uint_32 n, nstop;
262 int channel;
263 int color_channels = row_info->channels;
264 if (row_info->color_type > 3)color_channels--;
265
266 for (n = 0, nstop=row_info->width; n<nstop; n++)
267 {
268 for (channel = 0; channel < color_channels; channel++)
269 {
270 if (row_info->bit_depth == 8)
271 if (*dp++ == 0)
272 zero_samples++;
273
274 if (row_info->bit_depth == 16)
275 {
276 if ((*dp | *(dp+1)) == 0)
277 zero_samples++;
278
279 dp+=2;
280 }
281 }
282 if (row_info->color_type > 3)
283 {
284 dp++;
285 if (row_info->bit_depth == 16)
286 dp++;
287 }
288 }
289 }
290}
291#endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */
292
293static int wrote_question = 0;
294
295#ifndef PNG_STDIO_SUPPORTED
296/* START of code to validate stdio-free compilation */
297/* These copies of the default read/write functions come from pngrio.c and
298 * pngwio.c. They allow "don't include stdio" testing of the library.
299 * This is the function that does the actual reading of data. If you are
300 * not reading from a standard C stream, you should create a replacement
301 * read_data function and use it at run time with png_set_read_fn(), rather
302 * than changing the library.
303 */
304
305#ifdef PNG_IO_STATE_SUPPORTED
306void
307pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
308 png_uint_32 io_op);
309void
310pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
311 png_uint_32 io_op)
312{
313 png_uint_32 io_state = png_get_io_state(png_ptr);
314 int err = 0;
315
316 /* Check if the current operation (reading / writing) is as expected. */
317 if ((io_state & PNG_IO_MASK_OP) != io_op)
318 png_error(png_ptr, "Incorrect operation in I/O state");
319
320 /* Check if the buffer size specific to the current location
321 * (file signature / header / data / crc) is as expected.
322 */
323 switch (io_state & PNG_IO_MASK_LOC)
324 {
325 case PNG_IO_SIGNATURE:
326 if (data_length > 8)
327 err = 1;
328 break;
329 case PNG_IO_CHUNK_HDR:
330 if (data_length != 8)
331 err = 1;
332 break;
333 case PNG_IO_CHUNK_DATA:
334 break; /* no restrictions here */
335 case PNG_IO_CHUNK_CRC:
336 if (data_length != 4)
337 err = 1;
338 break;
339 default:
340 err = 1; /* uninitialized */
341 }
342 if (err)
343 png_error(png_ptr, "Bad I/O state or buffer size");
344}
345#endif
346
347#ifndef USE_FAR_KEYWORD
348static void PNGCBAPI
349pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
350{
351 png_size_t check = 0;
352 png_voidp io_ptr;
353
354 /* fread() returns 0 on error, so it is OK to store this in a png_size_t
355 * instead of an int, which is what fread() actually returns.
356 */
357 io_ptr = png_get_io_ptr(png_ptr);
358 if (io_ptr != NULL)
359 {
360 check = fread(data, 1, length, (png_FILE_p)io_ptr);
361 }
362
363 if (check != length)
364 {
365 png_error(png_ptr, "Read Error");
366 }
367
368#ifdef PNG_IO_STATE_SUPPORTED
369 pngtest_check_io_state(png_ptr, length, PNG_IO_READING);
370#endif
371}
372#else
373/* This is the model-independent version. Since the standard I/O library
374 can't handle far buffers in the medium and small models, we have to copy
375 the data.
376*/
377
378#define NEAR_BUF_SIZE 1024
379#define MIN(a,b) (a <= b ? a : b)
380
381static void PNGCBAPI
382pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
383{
384 png_size_t check;
385 png_byte *n_data;
386 png_FILE_p io_ptr;
387
388 /* Check if data really is near. If so, use usual code. */
389 n_data = (png_byte *)CVT_PTR_NOCHECK(data);
390 io_ptr = (png_FILE_p)CVT_PTR(png_get_io_ptr(png_ptr));
391 if ((png_bytep)n_data == data)
392 {
393 check = fread(n_data, 1, length, io_ptr);
394 }
395 else
396 {
397 png_byte buf[NEAR_BUF_SIZE];
398 png_size_t read, remaining, err;
399 check = 0;
400 remaining = length;
401
402 do
403 {
404 read = MIN(NEAR_BUF_SIZE, remaining);
405 err = fread(buf, 1, 1, io_ptr);
406 png_memcpy(data, buf, read); /* Copy far buffer to near buffer */
407 if (err != read)
408 break;
409 else
410 check += err;
411 data += read;
412 remaining -= read;
413 }
414 while (remaining != 0);
415 }
416
417 if (check != length)
418 png_error(png_ptr, "Read Error");
419
420#ifdef PNG_IO_STATE_SUPPORTED
421 pngtest_check_io_state(png_ptr, length, PNG_IO_READING);
422#endif
423}
424#endif /* USE_FAR_KEYWORD */
425
426#ifdef PNG_WRITE_FLUSH_SUPPORTED
427static void PNGCBAPI
428pngtest_flush(png_structp png_ptr)
429{
430 /* Do nothing; fflush() is said to be just a waste of energy. */
431 PNG_UNUSED(png_ptr) /* Stifle compiler warning */
432}
433#endif
434
435/* This is the function that does the actual writing of data. If you are
436 * not writing to a standard C stream, you should create a replacement
437 * write_data function and use it at run time with png_set_write_fn(), rather
438 * than changing the library.
439 */
440#ifndef USE_FAR_KEYWORD
441static void PNGCBAPI
442pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
443{
444 png_size_t check;
445
446 check = fwrite(data, 1, length, (png_FILE_p)png_get_io_ptr(png_ptr));
447
448 if (check != length)
449 {
450 png_error(png_ptr, "Write Error");
451 }
452
453#ifdef PNG_IO_STATE_SUPPORTED
454 pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING);
455#endif
456}
457#else
458/* This is the model-independent version. Since the standard I/O library
459 can't handle far buffers in the medium and small models, we have to copy
460 the data.
461*/
462
463#define NEAR_BUF_SIZE 1024
464#define MIN(a,b) (a <= b ? a : b)
465
466static void PNGCBAPI
467pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
468{
469 png_size_t check;
470 png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
471 png_FILE_p io_ptr;
472
473 /* Check if data really is near. If so, use usual code. */
474 near_data = (png_byte *)CVT_PTR_NOCHECK(data);
475 io_ptr = (png_FILE_p)CVT_PTR(png_get_io_ptr(png_ptr));
476
477 if ((png_bytep)near_data == data)
478 {
479 check = fwrite(near_data, 1, length, io_ptr);
480 }
481
482 else
483 {
484 png_byte buf[NEAR_BUF_SIZE];
485 png_size_t written, remaining, err;
486 check = 0;
487 remaining = length;
488
489 do
490 {
491 written = MIN(NEAR_BUF_SIZE, remaining);
492 png_memcpy(buf, data, written); /* Copy far buffer to near buffer */
493 err = fwrite(buf, 1, written, io_ptr);
494 if (err != written)
495 break;
496 else
497 check += err;
498 data += written;
499 remaining -= written;
500 }
501 while (remaining != 0);
502 }
503
504 if (check != length)
505 {
506 png_error(png_ptr, "Write Error");
507 }
508
509#ifdef PNG_IO_STATE_SUPPORTED
510 pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING);
511#endif
512}
513#endif /* USE_FAR_KEYWORD */
514
515/* This function is called when there is a warning, but the library thinks
516 * it can continue anyway. Replacement functions don't have to do anything
517 * here if you don't want to. In the default configuration, png_ptr is
518 * not used, but it is passed in case it may be useful.
519 */
520static void PNGCBAPI
521pngtest_warning(png_structp png_ptr, png_const_charp message)
522{
523 PNG_CONST char *name = "UNKNOWN (ERROR!)";
524 char *test;
525 test = png_get_error_ptr(png_ptr);
526
527 if (test == NULL)
528 fprintf(STDERR, "%s: libpng warning: %s\n", name, message);
529
530 else
531 fprintf(STDERR, "%s: libpng warning: %s\n", test, message);
532}
533
534/* This is the default error handling function. Note that replacements for
535 * this function MUST NOT RETURN, or the program will likely crash. This
536 * function is used by default, or if the program supplies NULL for the
537 * error function pointer in png_set_error_fn().
538 */
539static void PNGCBAPI
540pngtest_error(png_structp png_ptr, png_const_charp message)
541{
542 pngtest_warning(png_ptr, message);
543 /* We can return because png_error calls the default handler, which is
544 * actually OK in this case.
545 */
546}
547#endif /* !PNG_STDIO_SUPPORTED */
548/* END of code to validate stdio-free compilation */
549
550/* START of code to validate memory allocation and deallocation */
551#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
552
553/* Allocate memory. For reasonable files, size should never exceed
554 * 64K. However, zlib may allocate more then 64K if you don't tell
555 * it not to. See zconf.h and png.h for more information. zlib does
556 * need to allocate exactly 64K, so whatever you call here must
557 * have the ability to do that.
558 *
559 * This piece of code can be compiled to validate max 64K allocations
560 * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K.
561 */
562typedef struct memory_information
563{
564 png_alloc_size_t size;
565 png_voidp pointer;
566 struct memory_information FAR *next;
567} memory_information;
568typedef memory_information FAR *memory_infop;
569
570static memory_infop pinformation = NULL;
571static int current_allocation = 0;
572static int maximum_allocation = 0;
573static int total_allocation = 0;
574static int num_allocations = 0;
575
576png_voidp PNGCBAPI png_debug_malloc PNGARG((png_structp png_ptr,
577 png_alloc_size_t size));
578void PNGCBAPI png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr));
579
580png_voidp
581PNGCBAPI png_debug_malloc(png_structp png_ptr, png_alloc_size_t size)
582{
583
584 /* png_malloc has already tested for NULL; png_create_struct calls
585 * png_debug_malloc directly, with png_ptr == NULL which is OK
586 */
587
588 if (size == 0)
589 return (NULL);
590
591 /* This calls the library allocator twice, once to get the requested
592 buffer and once to get a new free list entry. */
593 {
594 /* Disable malloc_fn and free_fn */
595 memory_infop pinfo;
596 png_set_mem_fn(png_ptr, NULL, NULL, NULL);
597 pinfo = (memory_infop)png_malloc(png_ptr,
598 png_sizeof(*pinfo));
599 pinfo->size = size;
600 current_allocation += size;
601 total_allocation += size;
602 num_allocations ++;
603
604 if (current_allocation > maximum_allocation)
605 maximum_allocation = current_allocation;
606
607 pinfo->pointer = png_malloc(png_ptr, size);
608 /* Restore malloc_fn and free_fn */
609
610 png_set_mem_fn(png_ptr,
611 NULL, png_debug_malloc, png_debug_free);
612
613 if (size != 0 && pinfo->pointer == NULL)
614 {
615 current_allocation -= size;
616 total_allocation -= size;
617 png_error(png_ptr,
618 "out of memory in pngtest->png_debug_malloc");
619 }
620
621 pinfo->next = pinformation;
622 pinformation = pinfo;
623 /* Make sure the caller isn't assuming zeroed memory. */
624 png_memset(pinfo->pointer, 0xdd, pinfo->size);
625
626 if (verbose)
627 printf("png_malloc %lu bytes at %p\n", (unsigned long)size,
628 pinfo->pointer);
629
630 return (png_voidp)(pinfo->pointer);
631 }
632}
633
634/* Free a pointer. It is removed from the list at the same time. */
635void PNGCBAPI
636png_debug_free(png_structp png_ptr, png_voidp ptr)
637{
638 if (png_ptr == NULL)
639 fprintf(STDERR, "NULL pointer to png_debug_free.\n");
640
641 if (ptr == 0)
642 {
643#if 0 /* This happens all the time. */
644 fprintf(STDERR, "WARNING: freeing NULL pointer\n");
645#endif
646 return;
647 }
648
649 /* Unlink the element from the list. */
650 {
651 memory_infop FAR *ppinfo = &pinformation;
652
653 for (;;)
654 {
655 memory_infop pinfo = *ppinfo;
656
657 if (pinfo->pointer == ptr)
658 {
659 *ppinfo = pinfo->next;
660 current_allocation -= pinfo->size;
661 if (current_allocation < 0)
662 fprintf(STDERR, "Duplicate free of memory\n");
663 /* We must free the list element too, but first kill
664 the memory that is to be freed. */
665 png_memset(ptr, 0x55, pinfo->size);
666 png_free_default(png_ptr, pinfo);
667 pinfo = NULL;
668 break;
669 }
670
671 if (pinfo->next == NULL)
672 {
673 fprintf(STDERR, "Pointer %x not found\n", (unsigned int)ptr);
674 break;
675 }
676
677 ppinfo = &pinfo->next;
678 }
679 }
680
681 /* Finally free the data. */
682 if (verbose)
683 printf("Freeing %p\n", ptr);
684
685 png_free_default(png_ptr, ptr);
686 ptr = NULL;
687}
688#endif /* PNG_USER_MEM_SUPPORTED && PNG_DEBUG */
689/* END of code to test memory allocation/deallocation */
690
691
692/* Demonstration of user chunk support of the sTER and vpAg chunks */
693#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
694
695/* (sTER is a public chunk not yet known by libpng. vpAg is a private
696chunk used in ImageMagick to store "virtual page" size). */
697
698static png_uint_32 user_chunk_data[4];
699
700 /* 0: sTER mode + 1
701 * 1: vpAg width
702 * 2: vpAg height
703 * 3: vpAg units
704 */
705
706static int PNGCBAPI read_user_chunk_callback(png_struct *png_ptr,
707 png_unknown_chunkp chunk)
708{
709 png_uint_32
710 *my_user_chunk_data;
711
712 /* Return one of the following:
713 * return (-n); chunk had an error
714 * return (0); did not recognize
715 * return (n); success
716 *
717 * The unknown chunk structure contains the chunk data:
718 * png_byte name[5];
719 * png_byte *data;
720 * png_size_t size;
721 *
722 * Note that libpng has already taken care of the CRC handling.
723 */
724
725 if (chunk->name[0] == 115 && chunk->name[1] == 84 && /* s T */
726 chunk->name[2] == 69 && chunk->name[3] == 82) /* E R */
727 {
728 /* Found sTER chunk */
729 if (chunk->size != 1)
730 return (-1); /* Error return */
731
732 if (chunk->data[0] != 0 && chunk->data[0] != 1)
733 return (-1); /* Invalid mode */
734
735 my_user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
736 my_user_chunk_data[0]=chunk->data[0]+1;
737 return (1);
738 }
739
740 if (chunk->name[0] != 118 || chunk->name[1] != 112 || /* v p */
741 chunk->name[2] != 65 || chunk->name[3] != 103) /* A g */
742 return (0); /* Did not recognize */
743
744 /* Found ImageMagick vpAg chunk */
745
746 if (chunk->size != 9)
747 return (-1); /* Error return */
748
749 my_user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
750
751 my_user_chunk_data[1]=png_get_uint_31(png_ptr, chunk->data);
752 my_user_chunk_data[2]=png_get_uint_31(png_ptr, chunk->data + 4);
753 my_user_chunk_data[3]=(png_uint_32)chunk->data[8];
754
755 return (1);
756
757}
758#endif
759/* END of code to demonstrate user chunk support */
760
761/* Test one file */
762int
763test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
764{
765 static png_FILE_p fpin;
766 static png_FILE_p fpout; /* "static" prevents setjmp corruption */
767 png_structp read_ptr;
768 png_infop read_info_ptr, end_info_ptr;
769#ifdef PNG_WRITE_SUPPORTED
770 png_structp write_ptr;
771 png_infop write_info_ptr;
772 png_infop write_end_info_ptr;
773#else
774 png_structp write_ptr = NULL;
775 png_infop write_info_ptr = NULL;
776 png_infop write_end_info_ptr = NULL;
777#endif
778 png_bytep row_buf;
779 png_uint_32 y;
780 png_uint_32 width, height;
781 int num_pass, pass;
782 int bit_depth, color_type;
783#ifdef PNG_SETJMP_SUPPORTED
784#ifdef USE_FAR_KEYWORD
785 jmp_buf tmp_jmpbuf;
786#endif
787#endif
788
789 char inbuf[256], outbuf[256];
790
791 row_buf = NULL;
792
793 if ((fpin = fopen(inname, "rb")) == NULL)
794 {
795 fprintf(STDERR, "Could not find input file %s\n", inname);
796 return (1);
797 }
798
799 if ((fpout = fopen(outname, "wb")) == NULL)
800 {
801 fprintf(STDERR, "Could not open output file %s\n", outname);
802 FCLOSE(fpin);
803 return (1);
804 }
805
806 pngtest_debug("Allocating read and write structures");
807#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
808 read_ptr =
809 png_create_read_struct_2(PNG_LIBPNG_VER_STRING, NULL,
810 NULL, NULL, NULL, png_debug_malloc, png_debug_free);
811#else
812 read_ptr =
813 png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
814#endif
815#ifndef PNG_STDIO_SUPPORTED
816 png_set_error_fn(read_ptr, (png_voidp)inname, pngtest_error,
817 pngtest_warning);
818#endif
819
820#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
821 user_chunk_data[0] = 0;
822 user_chunk_data[1] = 0;
823 user_chunk_data[2] = 0;
824 user_chunk_data[3] = 0;
825 png_set_read_user_chunk_fn(read_ptr, user_chunk_data,
826 read_user_chunk_callback);
827
828#endif
829#ifdef PNG_WRITE_SUPPORTED
830#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
831 write_ptr =
832 png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL,
833 NULL, NULL, NULL, png_debug_malloc, png_debug_free);
834#else
835 write_ptr =
836 png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
837#endif
838#ifndef PNG_STDIO_SUPPORTED
839 png_set_error_fn(write_ptr, (png_voidp)inname, pngtest_error,
840 pngtest_warning);
841#endif
842#endif
843 pngtest_debug("Allocating read_info, write_info and end_info structures");
844 read_info_ptr = png_create_info_struct(read_ptr);
845 end_info_ptr = png_create_info_struct(read_ptr);
846#ifdef PNG_WRITE_SUPPORTED
847 write_info_ptr = png_create_info_struct(write_ptr);
848 write_end_info_ptr = png_create_info_struct(write_ptr);
849#endif
850
851#ifdef PNG_SETJMP_SUPPORTED
852 pngtest_debug("Setting jmpbuf for read struct");
853#ifdef USE_FAR_KEYWORD
854 if (setjmp(tmp_jmpbuf))
855#else
856 if (setjmp(png_jmpbuf(read_ptr)))
857#endif
858 {
859 fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
860 png_free(read_ptr, row_buf);
861 row_buf = NULL;
862 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
863#ifdef PNG_WRITE_SUPPORTED
864 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
865 png_destroy_write_struct(&write_ptr, &write_info_ptr);
866#endif
867 FCLOSE(fpin);
868 FCLOSE(fpout);
869 return (1);
870 }
871#ifdef USE_FAR_KEYWORD
872 png_memcpy(png_jmpbuf(read_ptr), tmp_jmpbuf, png_sizeof(jmp_buf));
873#endif
874
875#ifdef PNG_WRITE_SUPPORTED
876 pngtest_debug("Setting jmpbuf for write struct");
877#ifdef USE_FAR_KEYWORD
878
879 if (setjmp(tmp_jmpbuf))
880#else
881 if (setjmp(png_jmpbuf(write_ptr)))
882#endif
883 {
884 fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
885 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
886 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
887#ifdef PNG_WRITE_SUPPORTED
888 png_destroy_write_struct(&write_ptr, &write_info_ptr);
889#endif
890 FCLOSE(fpin);
891 FCLOSE(fpout);
892 return (1);
893 }
894
895#ifdef USE_FAR_KEYWORD
896 png_memcpy(png_jmpbuf(write_ptr), tmp_jmpbuf, png_sizeof(jmp_buf));
897#endif
898#endif
899#endif
900
901 pngtest_debug("Initializing input and output streams");
902#ifdef PNG_STDIO_SUPPORTED
903 png_init_io(read_ptr, fpin);
904# ifdef PNG_WRITE_SUPPORTED
905 png_init_io(write_ptr, fpout);
906# endif
907#else
908 png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data);
909# ifdef PNG_WRITE_SUPPORTED
910 png_set_write_fn(write_ptr, (png_voidp)fpout, pngtest_write_data,
911# ifdef PNG_WRITE_FLUSH_SUPPORTED
912 pngtest_flush);
913# else
914 NULL);
915# endif
916# endif
917#endif
918
919#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
920 /* Normally one would use Z_DEFAULT_STRATEGY for text compression.
921 * This is here just to make pngtest replicate the results from libpng
922 * versions prior to 1.5.4, and to test this new API.
923 */
924 png_set_text_compression_strategy(write_ptr, Z_FILTERED);
925#endif
926
927 if (status_dots_requested == 1)
928 {
929#ifdef PNG_WRITE_SUPPORTED
930 png_set_write_status_fn(write_ptr, write_row_callback);
931#endif
932 png_set_read_status_fn(read_ptr, read_row_callback);
933 }
934
935 else
936 {
937#ifdef PNG_WRITE_SUPPORTED
938 png_set_write_status_fn(write_ptr, NULL);
939#endif
940 png_set_read_status_fn(read_ptr, NULL);
941 }
942
943#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
944 {
945 int i;
946
947 for (i = 0; i<256; i++)
948 filters_used[i] = 0;
949
950 png_set_read_user_transform_fn(read_ptr, count_filters);
951 }
952#endif
953#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
954 zero_samples = 0;
955 png_set_write_user_transform_fn(write_ptr, count_zero_samples);
956#endif
957
958#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
959# ifndef PNG_HANDLE_CHUNK_ALWAYS
960# define PNG_HANDLE_CHUNK_ALWAYS 3
961# endif
962 png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS,
963 NULL, 0);
964#endif
965#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
966# ifndef PNG_HANDLE_CHUNK_IF_SAFE
967# define PNG_HANDLE_CHUNK_IF_SAFE 2
968# endif
969 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_IF_SAFE,
970 NULL, 0);
971#endif
972
973 pngtest_debug("Reading info struct");
974 png_read_info(read_ptr, read_info_ptr);
975
976 pngtest_debug("Transferring info struct");
977 {
978 int interlace_type, compression_type, filter_type;
979
980 if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth,
981 &color_type, &interlace_type, &compression_type, &filter_type))
982 {
983 png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth,
984#ifdef PNG_WRITE_INTERLACING_SUPPORTED
985 color_type, interlace_type, compression_type, filter_type);
986#else
987 color_type, PNG_INTERLACE_NONE, compression_type, filter_type);
988#endif
989 }
990 }
991#ifdef PNG_FIXED_POINT_SUPPORTED
992#ifdef PNG_cHRM_SUPPORTED
993 {
994 png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
995 blue_y;
996
997 if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y,
998 &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y))
999 {
1000 png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x,
1001 red_y, green_x, green_y, blue_x, blue_y);
1002 }
1003 }
1004#endif
1005#ifdef PNG_gAMA_SUPPORTED
1006 {
1007 png_fixed_point gamma;
1008
1009 if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma))
1010 png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma);
1011 }
1012#endif
1013#else /* Use floating point versions */
1014#ifdef PNG_FLOATING_POINT_SUPPORTED
1015#ifdef PNG_cHRM_SUPPORTED
1016 {
1017 double white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
1018 blue_y;
1019
1020 if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
1021 &red_y, &green_x, &green_y, &blue_x, &blue_y))
1022 {
1023 png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x,
1024 red_y, green_x, green_y, blue_x, blue_y);
1025 }
1026 }
1027#endif
1028#ifdef PNG_gAMA_SUPPORTED
1029 {
1030 double gamma;
1031
1032 if (png_get_gAMA(read_ptr, read_info_ptr, &gamma))
1033 png_set_gAMA(write_ptr, write_info_ptr, gamma);
1034 }
1035#endif
1036#endif /* Floating point */
1037#endif /* Fixed point */
1038#ifdef PNG_iCCP_SUPPORTED
1039 {
1040 png_charp name;
1041 png_bytep profile;
1042 png_uint_32 proflen;
1043 int compression_type;
1044
1045 if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type,
1046 &profile, &proflen))
1047 {
1048 png_set_iCCP(write_ptr, write_info_ptr, name, compression_type,
1049 profile, proflen);
1050 }
1051 }
1052#endif
1053#ifdef PNG_sRGB_SUPPORTED
1054 {
1055 int intent;
1056
1057 if (png_get_sRGB(read_ptr, read_info_ptr, &intent))
1058 png_set_sRGB(write_ptr, write_info_ptr, intent);
1059 }
1060#endif
1061 {
1062 png_colorp palette;
1063 int num_palette;
1064
1065 if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette))
1066 png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
1067 }
1068#ifdef PNG_bKGD_SUPPORTED
1069 {
1070 png_color_16p background;
1071
1072 if (png_get_bKGD(read_ptr, read_info_ptr, &background))
1073 {
1074 png_set_bKGD(write_ptr, write_info_ptr, background);
1075 }
1076 }
1077#endif
1078#ifdef PNG_hIST_SUPPORTED
1079 {
1080 png_uint_16p hist;
1081
1082 if (png_get_hIST(read_ptr, read_info_ptr, &hist))
1083 png_set_hIST(write_ptr, write_info_ptr, hist);
1084 }
1085#endif
1086#ifdef PNG_oFFs_SUPPORTED
1087 {
1088 png_int_32 offset_x, offset_y;
1089 int unit_type;
1090
1091 if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y,
1092 &unit_type))
1093 {
1094 png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
1095 }
1096 }
1097#endif
1098#ifdef PNG_pCAL_SUPPORTED
1099 {
1100 png_charp purpose, units;
1101 png_charpp params;
1102 png_int_32 X0, X1;
1103 int type, nparams;
1104
1105 if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type,
1106 &nparams, &units, &params))
1107 {
1108 png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type,
1109 nparams, units, params);
1110 }
1111 }
1112#endif
1113#ifdef PNG_pHYs_SUPPORTED
1114 {
1115 png_uint_32 res_x, res_y;
1116 int unit_type;
1117
1118 if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y, &unit_type))
1119 png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type);
1120 }
1121#endif
1122#ifdef PNG_sBIT_SUPPORTED
1123 {
1124 png_color_8p sig_bit;
1125
1126 if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit))
1127 png_set_sBIT(write_ptr, write_info_ptr, sig_bit);
1128 }
1129#endif
1130#ifdef PNG_sCAL_SUPPORTED
1131#ifdef PNG_FLOATING_POINT_SUPPORTED
1132 {
1133 int unit;
1134 double scal_width, scal_height;
1135
1136 if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width,
1137 &scal_height))
1138 {
1139 png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height);
1140 }
1141 }
1142#else
1143#ifdef PNG_FIXED_POINT_SUPPORTED
1144 {
1145 int unit;
1146 png_charp scal_width, scal_height;
1147
1148 if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width,
1149 &scal_height))
1150 {
1151 png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width,
1152 scal_height);
1153 }
1154 }
1155#endif
1156#endif
1157#endif
1158#ifdef PNG_TEXT_SUPPORTED
1159 {
1160 png_textp text_ptr;
1161 int num_text;
1162
1163 if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
1164 {
1165 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1166
1167 if (verbose)
1168 printf("\nText compression=%d\n", text_ptr->compression);
1169
1170 png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
1171 }
1172 }
1173#endif
1174#ifdef PNG_tIME_SUPPORTED
1175 {
1176 png_timep mod_time;
1177
1178 if (png_get_tIME(read_ptr, read_info_ptr, &mod_time))
1179 {
1180 png_set_tIME(write_ptr, write_info_ptr, mod_time);
1181#ifdef PNG_TIME_RFC1123_SUPPORTED
1182 /* We have to use png_memcpy instead of "=" because the string
1183 * pointed to by png_convert_to_rfc1123() gets free'ed before
1184 * we use it.
1185 */
1186 png_memcpy(tIME_string,
1187 png_convert_to_rfc1123(read_ptr, mod_time),
1188 png_sizeof(tIME_string));
1189
1190 tIME_string[png_sizeof(tIME_string) - 1] = '\0';
1191 tIME_chunk_present++;
1192#endif /* PNG_TIME_RFC1123_SUPPORTED */
1193 }
1194 }
1195#endif
1196#ifdef PNG_tRNS_SUPPORTED
1197 {
1198 png_bytep trans_alpha;
1199 int num_trans;
1200 png_color_16p trans_color;
1201
1202 if (png_get_tRNS(read_ptr, read_info_ptr, &trans_alpha, &num_trans,
1203 &trans_color))
1204 {
1205 int sample_max = (1 << bit_depth);
1206 /* libpng doesn't reject a tRNS chunk with out-of-range samples */
1207 if (!((color_type == PNG_COLOR_TYPE_GRAY &&
1208 (int)trans_color->gray > sample_max) ||
1209 (color_type == PNG_COLOR_TYPE_RGB &&
1210 ((int)trans_color->red > sample_max ||
1211 (int)trans_color->green > sample_max ||
1212 (int)trans_color->blue > sample_max))))
1213 png_set_tRNS(write_ptr, write_info_ptr, trans_alpha, num_trans,
1214 trans_color);
1215 }
1216 }
1217#endif
1218#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1219 {
1220 png_unknown_chunkp unknowns;
1221 int num_unknowns = png_get_unknown_chunks(read_ptr, read_info_ptr,
1222 &unknowns);
1223
1224 if (num_unknowns)
1225 {
1226 int i;
1227 png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns,
1228 num_unknowns);
1229 /* Copy the locations from the read_info_ptr. The automatically
1230 * generated locations in write_info_ptr are wrong because we
1231 * haven't written anything yet.
1232 */
1233 for (i = 0; i < num_unknowns; i++)
1234 png_set_unknown_chunk_location(write_ptr, write_info_ptr, i,
1235 unknowns[i].location);
1236 }
1237 }
1238#endif
1239
1240#ifdef PNG_WRITE_SUPPORTED
1241 pngtest_debug("Writing info struct");
1242
1243/* If we wanted, we could write info in two steps:
1244 * png_write_info_before_PLTE(write_ptr, write_info_ptr);
1245 */
1246 png_write_info(write_ptr, write_info_ptr);
1247
1248#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
1249 if (user_chunk_data[0] != 0)
1250 {
1251 png_byte png_sTER[5] = {115, 84, 69, 82, '\0'};
1252
1253 unsigned char
1254 ster_chunk_data[1];
1255
1256 if (verbose)
1257 fprintf(STDERR, "\n stereo mode = %lu\n",
1258 (unsigned long)(user_chunk_data[0] - 1));
1259
1260 ster_chunk_data[0]=(unsigned char)(user_chunk_data[0] - 1);
1261 png_write_chunk(write_ptr, png_sTER, ster_chunk_data, 1);
1262 }
1263
1264 if (user_chunk_data[1] != 0 || user_chunk_data[2] != 0)
1265 {
1266 png_byte png_vpAg[5] = {118, 112, 65, 103, '\0'};
1267
1268 unsigned char
1269 vpag_chunk_data[9];
1270
1271 if (verbose)
1272 fprintf(STDERR, " vpAg = %lu x %lu, units = %lu\n",
1273 (unsigned long)user_chunk_data[1],
1274 (unsigned long)user_chunk_data[2],
1275 (unsigned long)user_chunk_data[3]);
1276
1277 png_save_uint_32(vpag_chunk_data, user_chunk_data[1]);
1278 png_save_uint_32(vpag_chunk_data + 4, user_chunk_data[2]);
1279 vpag_chunk_data[8] = (unsigned char)(user_chunk_data[3] & 0xff);
1280 png_write_chunk(write_ptr, png_vpAg, vpag_chunk_data, 9);
1281 }
1282
1283#endif
1284#endif
1285
1286#ifdef SINGLE_ROWBUF_ALLOC
1287 pngtest_debug("Allocating row buffer...");
1288 row_buf = (png_bytep)png_malloc(read_ptr,
1289 png_get_rowbytes(read_ptr, read_info_ptr));
1290
1291 pngtest_debug1("\t0x%08lx", (unsigned long)row_buf);
1292#endif /* SINGLE_ROWBUF_ALLOC */
1293 pngtest_debug("Writing row data");
1294
1295#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
1296 defined(PNG_WRITE_INTERLACING_SUPPORTED)
1297 num_pass = png_set_interlace_handling(read_ptr);
1298# ifdef PNG_WRITE_SUPPORTED
1299 png_set_interlace_handling(write_ptr);
1300# endif
1301#else
1302 num_pass = 1;
1303#endif
1304
1305#ifdef PNGTEST_TIMING
1306 t_stop = (float)clock();
1307 t_misc += (t_stop - t_start);
1308 t_start = t_stop;
1309#endif
1310 for (pass = 0; pass < num_pass; pass++)
1311 {
1312 pngtest_debug1("Writing row data for pass %d", pass);
1313 for (y = 0; y < height; y++)
1314 {
1315#ifndef SINGLE_ROWBUF_ALLOC
1316 pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y);
1317 row_buf = (png_bytep)png_malloc(read_ptr,
1318 png_get_rowbytes(read_ptr, read_info_ptr));
1319
1320 pngtest_debug2("\t0x%08lx (%u bytes)", (unsigned long)row_buf,
1321 png_get_rowbytes(read_ptr, read_info_ptr));
1322
1323#endif /* !SINGLE_ROWBUF_ALLOC */
1324 png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1);
1325
1326#ifdef PNG_WRITE_SUPPORTED
1327#ifdef PNGTEST_TIMING
1328 t_stop = (float)clock();
1329 t_decode += (t_stop - t_start);
1330 t_start = t_stop;
1331#endif
1332 png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
1333#ifdef PNGTEST_TIMING
1334 t_stop = (float)clock();
1335 t_encode += (t_stop - t_start);
1336 t_start = t_stop;
1337#endif
1338#endif /* PNG_WRITE_SUPPORTED */
1339
1340#ifndef SINGLE_ROWBUF_ALLOC
1341 pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y);
1342 png_free(read_ptr, row_buf);
1343 row_buf = NULL;
1344#endif /* !SINGLE_ROWBUF_ALLOC */
1345 }
1346 }
1347
1348#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1349 png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1);
1350#endif
1351#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1352 png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
1353#endif
1354
1355 pngtest_debug("Reading and writing end_info data");
1356
1357 png_read_end(read_ptr, end_info_ptr);
1358#ifdef PNG_TEXT_SUPPORTED
1359 {
1360 png_textp text_ptr;
1361 int num_text;
1362
1363 if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
1364 {
1365 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1366 png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
1367 }
1368 }
1369#endif
1370#ifdef PNG_tIME_SUPPORTED
1371 {
1372 png_timep mod_time;
1373
1374 if (png_get_tIME(read_ptr, end_info_ptr, &mod_time))
1375 {
1376 png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
1377#ifdef PNG_TIME_RFC1123_SUPPORTED
1378 /* We have to use png_memcpy instead of "=" because the string
1379 pointed to by png_convert_to_rfc1123() gets free'ed before
1380 we use it */
1381 png_memcpy(tIME_string,
1382 png_convert_to_rfc1123(read_ptr, mod_time),
1383 png_sizeof(tIME_string));
1384
1385 tIME_string[png_sizeof(tIME_string) - 1] = '\0';
1386 tIME_chunk_present++;
1387#endif /* PNG_TIME_RFC1123_SUPPORTED */
1388 }
1389 }
1390#endif
1391#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1392 {
1393 png_unknown_chunkp unknowns;
1394 int num_unknowns = png_get_unknown_chunks(read_ptr, end_info_ptr,
1395 &unknowns);
1396
1397 if (num_unknowns)
1398 {
1399 int i;
1400 png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns,
1401 num_unknowns);
1402 /* Copy the locations from the read_info_ptr. The automatically
1403 * generated locations in write_end_info_ptr are wrong because we
1404 * haven't written the end_info yet.
1405 */
1406 for (i = 0; i < num_unknowns; i++)
1407 png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i,
1408 unknowns[i].location);
1409 }
1410 }
1411#endif
1412#ifdef PNG_WRITE_SUPPORTED
1413 png_write_end(write_ptr, write_end_info_ptr);
1414#endif
1415
1416#ifdef PNG_EASY_ACCESS_SUPPORTED
1417 if (verbose)
1418 {
1419 png_uint_32 iwidth, iheight;
1420 iwidth = png_get_image_width(write_ptr, write_info_ptr);
1421 iheight = png_get_image_height(write_ptr, write_info_ptr);
1422 fprintf(STDERR, "\n Image width = %lu, height = %lu\n",
1423 (unsigned long)iwidth, (unsigned long)iheight);
1424 }
1425#endif
1426
1427 pngtest_debug("Destroying data structs");
1428#ifdef SINGLE_ROWBUF_ALLOC
1429 pngtest_debug("destroying row_buf for read_ptr");
1430 png_free(read_ptr, row_buf);
1431 row_buf = NULL;
1432#endif /* SINGLE_ROWBUF_ALLOC */
1433 pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr");
1434 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
1435#ifdef PNG_WRITE_SUPPORTED
1436 pngtest_debug("destroying write_end_info_ptr");
1437 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
1438 pngtest_debug("destroying write_ptr, write_info_ptr");
1439 png_destroy_write_struct(&write_ptr, &write_info_ptr);
1440#endif
1441 pngtest_debug("Destruction complete.");
1442
1443 FCLOSE(fpin);
1444 FCLOSE(fpout);
1445
1446 pngtest_debug("Opening files for comparison");
1447 if ((fpin = fopen(inname, "rb")) == NULL)
1448 {
1449 fprintf(STDERR, "Could not find file %s\n", inname);
1450 return (1);
1451 }
1452
1453 if ((fpout = fopen(outname, "rb")) == NULL)
1454 {
1455 fprintf(STDERR, "Could not find file %s\n", outname);
1456 FCLOSE(fpin);
1457 return (1);
1458 }
1459
1460 for (;;)
1461 {
1462 png_size_t num_in, num_out;
1463
1464 num_in = fread(inbuf, 1, 1, fpin);
1465 num_out = fread(outbuf, 1, 1, fpout);
1466
1467 if (num_in != num_out)
1468 {
1469 fprintf(STDERR, "\nFiles %s and %s are of a different size\n",
1470 inname, outname);
1471
1472 if (wrote_question == 0)
1473 {
1474 fprintf(STDERR,
1475 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1476 inname, PNG_ZBUF_SIZE);
1477 fprintf(STDERR,
1478 "\n filtering heuristic (libpng default), compression");
1479 fprintf(STDERR,
1480 " level (zlib default),\n and zlib version (%s)?\n\n",
1481 ZLIB_VERSION);
1482 wrote_question = 1;
1483 }
1484
1485 FCLOSE(fpin);
1486 FCLOSE(fpout);
1487
1488 if (strict != 0)
1489 return (1);
1490
1491 else
1492 return (0);
1493 }
1494
1495 if (!num_in)
1496 break;
1497
1498 if (png_memcmp(inbuf, outbuf, num_in))
1499 {
1500 fprintf(STDERR, "\nFiles %s and %s are different\n", inname, outname);
1501
1502 if (wrote_question == 0)
1503 {
1504 fprintf(STDERR,
1505 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1506 inname, PNG_ZBUF_SIZE);
1507 fprintf(STDERR,
1508 "\n filtering heuristic (libpng default), compression");
1509 fprintf(STDERR,
1510 " level (zlib default),\n and zlib version (%s)?\n\n",
1511 ZLIB_VERSION);
1512 wrote_question = 1;
1513 }
1514
1515 FCLOSE(fpin);
1516 FCLOSE(fpout);
1517
1518 if (strict != 0)
1519 return (1);
1520
1521 else
1522 return (0);
1523 }
1524 }
1525
1526 FCLOSE(fpin);
1527 FCLOSE(fpout);
1528
1529 return (0);
1530}
1531
1532/* Input and output filenames */
1533#ifdef RISCOS
1534static PNG_CONST char *inname = "pngtest/png";
1535static PNG_CONST char *outname = "pngout/png";
1536#else
1537static PNG_CONST char *inname = "pngtest.png";
1538static PNG_CONST char *outname = "pngout.png";
1539#endif
1540
1541int
1542main(int argc, char *argv[])
1543{
1544 int multiple = 0;
1545 int ierror = 0;
1546
1547 fprintf(STDERR, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
1548 fprintf(STDERR, " with zlib version %s\n", ZLIB_VERSION);
1549 fprintf(STDERR, "%s", png_get_copyright(NULL));
1550 /* Show the version of libpng used in building the library */
1551 fprintf(STDERR, " library (%lu):%s",
1552 (unsigned long)png_access_version_number(),
1553 png_get_header_version(NULL));
1554
1555 /* Show the version of libpng used in building the application */
1556 fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
1557 PNG_HEADER_VERSION_STRING);
1558
1559 /* Do some consistency checking on the memory allocation settings, I'm
1560 * not sure this matters, but it is nice to know, the first of these
1561 * tests should be impossible because of the way the macros are set
1562 * in pngconf.h
1563 */
1564#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1565 fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n");
1566#endif
1567 /* I think the following can happen. */
1568#if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1569 fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n");
1570#endif
1571
1572 if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING))
1573 {
1574 fprintf(STDERR,
1575 "Warning: versions are different between png.h and png.c\n");
1576 fprintf(STDERR, " png.h version: %s\n", PNG_LIBPNG_VER_STRING);
1577 fprintf(STDERR, " png.c version: %s\n\n", png_libpng_ver);
1578 ++ierror;
1579 }
1580
1581 if (argc > 1)
1582 {
1583 if (strcmp(argv[1], "-m") == 0)
1584 {
1585 multiple = 1;
1586 status_dots_requested = 0;
1587 }
1588
1589 else if (strcmp(argv[1], "-mv") == 0 ||
1590 strcmp(argv[1], "-vm") == 0 )
1591 {
1592 multiple = 1;
1593 verbose = 1;
1594 status_dots_requested = 1;
1595 }
1596
1597 else if (strcmp(argv[1], "-v") == 0)
1598 {
1599 verbose = 1;
1600 status_dots_requested = 1;
1601 inname = argv[2];
1602 }
1603
1604 else if (strcmp(argv[1], "--strict") == 0)
1605 {
1606 status_dots_requested = 0;
1607 verbose = 1;
1608 inname = argv[2];
1609 strict++;
1610 }
1611
1612 else
1613 {
1614 inname = argv[1];
1615 status_dots_requested = 0;
1616 }
1617 }
1618
1619 if (!multiple && argc == 3 + verbose)
1620 outname = argv[2 + verbose];
1621
1622 if ((!multiple && argc > 3 + verbose) || (multiple && argc < 2))
1623 {
1624 fprintf(STDERR,
1625 "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
1626 argv[0], argv[0]);
1627 fprintf(STDERR,
1628 " reads/writes one PNG file (without -m) or multiple files (-m)\n");
1629 fprintf(STDERR,
1630 " with -m %s is used as a temporary file\n", outname);
1631 exit(1);
1632 }
1633
1634 if (multiple)
1635 {
1636 int i;
1637#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1638 int allocation_now = current_allocation;
1639#endif
1640 for (i=2; i<argc; ++i)
1641 {
1642 int kerror;
1643 fprintf(STDERR, "\n Testing %s:", argv[i]);
1644 kerror = test_one_file(argv[i], outname);
1645 if (kerror == 0)
1646 {
1647#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1648 int k;
1649#endif
1650#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1651 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1652 (unsigned long)zero_samples);
1653#else
1654 fprintf(STDERR, " PASS\n");
1655#endif
1656#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1657 for (k = 0; k<256; k++)
1658 if (filters_used[k])
1659 fprintf(STDERR, " Filter %d was used %lu times\n",
1660 k, (unsigned long)filters_used[k]);
1661#endif
1662#ifdef PNG_TIME_RFC1123_SUPPORTED
1663 if (tIME_chunk_present != 0)
1664 fprintf(STDERR, " tIME = %s\n", tIME_string);
1665
1666 tIME_chunk_present = 0;
1667#endif /* PNG_TIME_RFC1123_SUPPORTED */
1668 }
1669
1670 else
1671 {
1672 fprintf(STDERR, " FAIL\n");
1673 ierror += kerror;
1674 }
1675#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1676 if (allocation_now != current_allocation)
1677 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1678 current_allocation - allocation_now);
1679
1680 if (current_allocation != 0)
1681 {
1682 memory_infop pinfo = pinformation;
1683
1684 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1685 current_allocation);
1686
1687 while (pinfo != NULL)
1688 {
1689 fprintf(STDERR, " %lu bytes at %x\n",
1690 (unsigned long)pinfo->size,
1691 (unsigned int)pinfo->pointer);
1692 pinfo = pinfo->next;
1693 }
1694 }
1695#endif
1696 }
1697#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1698 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1699 current_allocation);
1700 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1701 maximum_allocation);
1702 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1703 total_allocation);
1704 fprintf(STDERR, " Number of allocations: %10d\n",
1705 num_allocations);
1706#endif
1707 }
1708
1709 else
1710 {
1711 int i;
1712 for (i = 0; i<3; ++i)
1713 {
1714 int kerror;
1715#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1716 int allocation_now = current_allocation;
1717#endif
1718 if (i == 1)
1719 status_dots_requested = 1;
1720
1721 else if (verbose == 0)
1722 status_dots_requested = 0;
1723
1724 if (i == 0 || verbose == 1 || ierror != 0)
1725 fprintf(STDERR, "\n Testing %s:", inname);
1726
1727 kerror = test_one_file(inname, outname);
1728
1729 if (kerror == 0)
1730 {
1731 if (verbose == 1 || i == 2)
1732 {
1733#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1734 int k;
1735#endif
1736#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1737 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1738 (unsigned long)zero_samples);
1739#else
1740 fprintf(STDERR, " PASS\n");
1741#endif
1742#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1743 for (k = 0; k<256; k++)
1744 if (filters_used[k])
1745 fprintf(STDERR, " Filter %d was used %lu times\n",
1746 k, (unsigned long)filters_used[k]);
1747#endif
1748#ifdef PNG_TIME_RFC1123_SUPPORTED
1749 if (tIME_chunk_present != 0)
1750 fprintf(STDERR, " tIME = %s\n", tIME_string);
1751#endif /* PNG_TIME_RFC1123_SUPPORTED */
1752 }
1753 }
1754
1755 else
1756 {
1757 if (verbose == 0 && i != 2)
1758 fprintf(STDERR, "\n Testing %s:", inname);
1759
1760 fprintf(STDERR, " FAIL\n");
1761 ierror += kerror;
1762 }
1763#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1764 if (allocation_now != current_allocation)
1765 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1766 current_allocation - allocation_now);
1767
1768 if (current_allocation != 0)
1769 {
1770 memory_infop pinfo = pinformation;
1771
1772 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1773 current_allocation);
1774
1775 while (pinfo != NULL)
1776 {
1777 fprintf(STDERR, " %lu bytes at %x\n",
1778 (unsigned long)pinfo->size, (unsigned int)pinfo->pointer);
1779 pinfo = pinfo->next;
1780 }
1781 }
1782#endif
1783 }
1784#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1785 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1786 current_allocation);
1787 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1788 maximum_allocation);
1789 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1790 total_allocation);
1791 fprintf(STDERR, " Number of allocations: %10d\n",
1792 num_allocations);
1793#endif
1794 }
1795
1796#ifdef PNGTEST_TIMING
1797 t_stop = (float)clock();
1798 t_misc += (t_stop - t_start);
1799 t_start = t_stop;
1800 fprintf(STDERR, " CPU time used = %.3f seconds",
1801 (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC);
1802 fprintf(STDERR, " (decoding %.3f,\n",
1803 t_decode/(float)CLOCKS_PER_SEC);
1804 fprintf(STDERR, " encoding %.3f ,",
1805 t_encode/(float)CLOCKS_PER_SEC);
1806 fprintf(STDERR, " other %.3f seconds)\n\n",
1807 t_misc/(float)CLOCKS_PER_SEC);
1808#endif
1809
1810 if (ierror == 0)
1811 fprintf(STDERR, " libpng passes test\n");
1812
1813 else
1814 fprintf(STDERR, " libpng FAILS test\n");
1815
1816 return (int)(ierror != 0);
1817}
1818
1819/* Generate a compiler error if there is an old png.h in the search path. */
1820typedef png_libpng_version_1_5_7 Your_png_h_is_not_version_1_5_7;
wxWidgets (Impactor)