source: trunk/src/3rdparty/libpng/pngtest.c@ 1125

Last change on this file since 1125 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 47.7 KB
Line 
1
2/* pngtest.c - a simple test program to test libpng
3 *
4 * Last changed in libpng 1.4.0 [January 3, 2010]
5 * Copyright (c) 1998-2010 Glenn Randers-Pehrson
6 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
7 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
8 *
9 * This code is released under the libpng license.
10 * For conditions of distribution and use, see the disclaimer
11 * and license in png.h
12 *
13 * This program reads in a PNG image, writes it out again, and then
14 * compares the two files. If the files are identical, this shows that
15 * the basic chunk handling, filtering, and (de)compression code is working
16 * properly. It does not currently test all of the transforms, although
17 * it probably should.
18 *
19 * The program will report "FAIL" in certain legitimate cases:
20 * 1) when the compression level or filter selection method is changed.
21 * 2) when the maximum IDAT size (PNG_ZBUF_SIZE in pngconf.h) is not 8192.
22 * 3) unknown unsafe-to-copy ancillary chunks or unknown critical chunks
23 * exist in the input file.
24 * 4) others not listed here...
25 * In these cases, it is best to check with another tool such as "pngcheck"
26 * to see what the differences between the two files are.
27 *
28 * If a filename is given on the command-line, then this file is used
29 * for the input, rather than the default "pngtest.png". This allows
30 * testing a wide variety of files easily. You can also test a number
31 * of files at once by typing "pngtest -m file1.png file2.png ..."
32 */
33
34#include "png.h"
35#include "pngpriv.h"
36
37# include <stdio.h>
38# include <stdlib.h>
39# define FCLOSE(file) fclose(file)
40
41#ifndef PNG_STDIO_SUPPORTED
42 typedef FILE * png_FILE_p;
43#endif
44
45/* Makes pngtest verbose so we can find problems (needs to be before png.h) */
46#ifndef PNG_DEBUG
47# define PNG_DEBUG 0
48#endif
49
50#if !PNG_DEBUG
51# define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */
52#endif
53
54/* Turn on CPU timing
55#define PNGTEST_TIMING
56*/
57
58#ifndef PNG_FLOATING_POINT_SUPPORTED
59#undef PNGTEST_TIMING
60#endif
61
62#ifdef PNGTEST_TIMING
63static float t_start, t_stop, t_decode, t_encode, t_misc;
64#include <time.h>
65#endif
66
67#ifdef PNG_TIME_RFC1123_SUPPORTED
68#define PNG_tIME_STRING_LENGTH 29
69static int tIME_chunk_present = 0;
70static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present";
71#endif
72
73static int verbose = 0;
74
75int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname));
76
77#ifdef __TURBOC__
78#include <mem.h>
79#endif
80
81/* Defined so I can write to a file on gui/windowing platforms */
82/* #define STDERR stderr */
83#define STDERR stdout /* For DOS */
84
85/* In case a system header (e.g., on AIX) defined jmpbuf */
86#ifdef jmpbuf
87# undef jmpbuf
88#endif
89
90/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
91#ifndef png_jmpbuf
92# define png_jmpbuf(png_ptr) png_ptr->jmpbuf
93#endif
94
95/* Example of using row callbacks to make a simple progress meter */
96static int status_pass = 1;
97static int status_dots_requested = 0;
98static int status_dots = 1;
99
100void
101read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
102void
103read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
104{
105 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX)
106 return;
107 if (status_pass != pass)
108 {
109 fprintf(stdout, "\n Pass %d: ", pass);
110 status_pass = pass;
111 status_dots = 31;
112 }
113 status_dots--;
114 if (status_dots == 0)
115 {
116 fprintf(stdout, "\n ");
117 status_dots=30;
118 }
119 fprintf(stdout, "r");
120}
121
122void
123write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
124void
125write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
126{
127 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7)
128 return;
129 fprintf(stdout, "w");
130}
131
132
133#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
134/* Example of using user transform callback (we don't transform anything,
135 * but merely examine the row filters. We set this to 256 rather than
136 * 5 in case illegal filter values are present.)
137 */
138static png_uint_32 filters_used[256];
139void
140count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data);
141void
142count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data)
143{
144 if (png_ptr != NULL && row_info != NULL)
145 ++filters_used[*(data - 1)];
146}
147#endif
148
149#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
150/* Example of using user transform callback (we don't transform anything,
151 * but merely count the zero samples)
152 */
153
154static png_uint_32 zero_samples;
155
156void
157count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data);
158void
159count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
160{
161 png_bytep dp = data;
162 if (png_ptr == NULL)return;
163
164 /* Contents of row_info:
165 * png_uint_32 width width of row
166 * png_uint_32 rowbytes number of bytes in row
167 * png_byte color_type color type of pixels
168 * png_byte bit_depth bit depth of samples
169 * png_byte channels number of channels (1-4)
170 * png_byte pixel_depth bits per pixel (depth*channels)
171 */
172
173 /* Counts the number of zero samples (or zero pixels if color_type is 3 */
174
175 if (row_info->color_type == 0 || row_info->color_type == 3)
176 {
177 int pos = 0;
178 png_uint_32 n, nstop;
179 for (n = 0, nstop=row_info->width; n<nstop; n++)
180 {
181 if (row_info->bit_depth == 1)
182 {
183 if (((*dp << pos++ ) & 0x80) == 0)
184 zero_samples++;
185 if (pos == 8)
186 {
187 pos = 0;
188 dp++;
189 }
190 }
191 if (row_info->bit_depth == 2)
192 {
193 if (((*dp << (pos+=2)) & 0xc0) == 0)
194 zero_samples++;
195 if (pos == 8)
196 {
197 pos = 0;
198 dp++;
199 }
200 }
201 if (row_info->bit_depth == 4)
202 {
203 if (((*dp << (pos+=4)) & 0xf0) == 0)
204 zero_samples++;
205 if (pos == 8)
206 {
207 pos = 0;
208 dp++;
209 }
210 }
211 if (row_info->bit_depth == 8)
212 if (*dp++ == 0)
213 zero_samples++;
214 if (row_info->bit_depth == 16)
215 {
216 if ((*dp | *(dp+1)) == 0)
217 zero_samples++;
218 dp+=2;
219 }
220 }
221 }
222 else /* Other color types */
223 {
224 png_uint_32 n, nstop;
225 int channel;
226 int color_channels = row_info->channels;
227 if (row_info->color_type > 3)color_channels--;
228
229 for (n = 0, nstop=row_info->width; n<nstop; n++)
230 {
231 for (channel = 0; channel < color_channels; channel++)
232 {
233 if (row_info->bit_depth == 8)
234 if (*dp++ == 0)
235 zero_samples++;
236 if (row_info->bit_depth == 16)
237 {
238 if ((*dp | *(dp+1)) == 0)
239 zero_samples++;
240 dp+=2;
241 }
242 }
243 if (row_info->color_type > 3)
244 {
245 dp++;
246 if (row_info->bit_depth == 16)
247 dp++;
248 }
249 }
250 }
251}
252#endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */
253
254static int wrote_question = 0;
255
256#ifndef PNG_STDIO_SUPPORTED
257/* START of code to validate stdio-free compilation */
258/* These copies of the default read/write functions come from pngrio.c and
259 * pngwio.c. They allow "don't include stdio" testing of the library.
260 * This is the function that does the actual reading of data. If you are
261 * not reading from a standard C stream, you should create a replacement
262 * read_data function and use it at run time with png_set_read_fn(), rather
263 * than changing the library.
264 */
265
266#ifndef USE_FAR_KEYWORD
267static void
268pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
269{
270 png_size_t check = 0;
271 png_voidp io_ptr;
272
273 /* fread() returns 0 on error, so it is OK to store this in a png_size_t
274 * instead of an int, which is what fread() actually returns.
275 */
276 io_ptr = png_get_io_ptr(png_ptr);
277 if (io_ptr != NULL)
278 {
279 check = fread(data, 1, length, (png_FILE_p)io_ptr);
280 }
281
282 if (check != length)
283 {
284 png_error(png_ptr, "Read Error!");
285 }
286}
287#else
288/* This is the model-independent version. Since the standard I/O library
289 can't handle far buffers in the medium and small models, we have to copy
290 the data.
291*/
292
293#define NEAR_BUF_SIZE 1024
294#define MIN(a,b) (a <= b ? a : b)
295
296static void
297pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
298{
299 png_size_t check;
300 png_byte *n_data;
301 png_FILE_p io_ptr;
302
303 /* Check if data really is near. If so, use usual code. */
304 n_data = (png_byte *)CVT_PTR_NOCHECK(data);
305 io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
306 if ((png_bytep)n_data == data)
307 {
308 check = fread(n_data, 1, length, io_ptr);
309 }
310 else
311 {
312 png_byte buf[NEAR_BUF_SIZE];
313 png_size_t read, remaining, err;
314 check = 0;
315 remaining = length;
316 do
317 {
318 read = MIN(NEAR_BUF_SIZE, remaining);
319 err = fread(buf, 1, 1, io_ptr);
320 png_memcpy(data, buf, read); /* Copy far buffer to near buffer */
321 if (err != read)
322 break;
323 else
324 check += err;
325 data += read;
326 remaining -= read;
327 }
328 while (remaining != 0);
329 }
330 if (check != length)
331 png_error(png_ptr, "read Error");
332}
333#endif /* USE_FAR_KEYWORD */
334
335#ifdef PNG_WRITE_FLUSH_SUPPORTED
336static void
337pngtest_flush(png_structp png_ptr)
338{
339 /* Do nothing; fflush() is said to be just a waste of energy. */
340 png_ptr = png_ptr; /* Stifle compiler warning */
341}
342#endif
343
344/* This is the function that does the actual writing of data. If you are
345 * not writing to a standard C stream, you should create a replacement
346 * write_data function and use it at run time with png_set_write_fn(), rather
347 * than changing the library.
348 */
349#ifndef USE_FAR_KEYWORD
350static void
351pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
352{
353 png_size_t check;
354
355 check = fwrite(data, 1, length, (png_FILE_p)png_ptr->io_ptr);
356 if (check != length)
357 {
358 png_error(png_ptr, "Write Error");
359 }
360}
361#else
362/* This is the model-independent version. Since the standard I/O library
363 can't handle far buffers in the medium and small models, we have to copy
364 the data.
365*/
366
367#define NEAR_BUF_SIZE 1024
368#define MIN(a,b) (a <= b ? a : b)
369
370static void
371pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
372{
373 png_size_t check;
374 png_byte *near_data; /* Needs to be "png_byte *" instead of "png_bytep" */
375 png_FILE_p io_ptr;
376
377 /* Check if data really is near. If so, use usual code. */
378 near_data = (png_byte *)CVT_PTR_NOCHECK(data);
379 io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
380 if ((png_bytep)near_data == data)
381 {
382 check = fwrite(near_data, 1, length, io_ptr);
383 }
384 else
385 {
386 png_byte buf[NEAR_BUF_SIZE];
387 png_size_t written, remaining, err;
388 check = 0;
389 remaining = length;
390 do
391 {
392 written = MIN(NEAR_BUF_SIZE, remaining);
393 png_memcpy(buf, data, written); /* Copy far buffer to near buffer */
394 err = fwrite(buf, 1, written, io_ptr);
395 if (err != written)
396 break;
397 else
398 check += err;
399 data += written;
400 remaining -= written;
401 }
402 while (remaining != 0);
403 }
404 if (check != length)
405 {
406 png_error(png_ptr, "Write Error");
407 }
408}
409#endif /* USE_FAR_KEYWORD */
410
411/* This function is called when there is a warning, but the library thinks
412 * it can continue anyway. Replacement functions don't have to do anything
413 * here if you don't want to. In the default configuration, png_ptr is
414 * not used, but it is passed in case it may be useful.
415 */
416static void
417pngtest_warning(png_structp png_ptr, png_const_charp message)
418{
419 PNG_CONST char *name = "UNKNOWN (ERROR!)";
420 char *test;
421 test = png_get_error_ptr(png_ptr);
422 if (test == NULL)
423 fprintf(STDERR, "%s: libpng warning: %s\n", name, message);
424 else
425 fprintf(STDERR, "%s: libpng warning: %s\n", test, message);
426}
427
428/* This is the default error handling function. Note that replacements for
429 * this function MUST NOT RETURN, or the program will likely crash. This
430 * function is used by default, or if the program supplies NULL for the
431 * error function pointer in png_set_error_fn().
432 */
433static void
434pngtest_error(png_structp png_ptr, png_const_charp message)
435{
436 pngtest_warning(png_ptr, message);
437 /* We can return because png_error calls the default handler, which is
438 * actually OK in this case.
439 */
440}
441#endif /* !PNG_STDIO_SUPPORTED */
442/* END of code to validate stdio-free compilation */
443
444/* START of code to validate memory allocation and deallocation */
445#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
446
447/* Allocate memory. For reasonable files, size should never exceed
448 * 64K. However, zlib may allocate more then 64K if you don't tell
449 * it not to. See zconf.h and png.h for more information. zlib does
450 * need to allocate exactly 64K, so whatever you call here must
451 * have the ability to do that.
452 *
453 * This piece of code can be compiled to validate max 64K allocations
454 * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K.
455 */
456typedef struct memory_information
457{
458 png_alloc_size_t size;
459 png_voidp pointer;
460 struct memory_information FAR *next;
461} memory_information;
462typedef memory_information FAR *memory_infop;
463
464static memory_infop pinformation = NULL;
465static int current_allocation = 0;
466static int maximum_allocation = 0;
467static int total_allocation = 0;
468static int num_allocations = 0;
469
470png_voidp png_debug_malloc
471 PNGARG((png_structp png_ptr, png_alloc_size_t size));
472void png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr));
473
474png_voidp
475png_debug_malloc(png_structp png_ptr, png_alloc_size_t size)
476{
477
478 /* png_malloc has already tested for NULL; png_create_struct calls
479 * png_debug_malloc directly, with png_ptr == NULL which is OK
480 */
481
482 if (size == 0)
483 return (NULL);
484
485 /* This calls the library allocator twice, once to get the requested
486 buffer and once to get a new free list entry. */
487 {
488 /* Disable malloc_fn and free_fn */
489 memory_infop pinfo;
490 png_set_mem_fn(png_ptr, NULL, NULL, NULL);
491 pinfo = (memory_infop)png_malloc(png_ptr,
492 png_sizeof(*pinfo));
493 pinfo->size = size;
494 current_allocation += size;
495 total_allocation += size;
496 num_allocations ++;
497 if (current_allocation > maximum_allocation)
498 maximum_allocation = current_allocation;
499 pinfo->pointer = png_malloc(png_ptr, size);
500 /* Restore malloc_fn and free_fn */
501 png_set_mem_fn(png_ptr,
502 NULL, png_debug_malloc, png_debug_free);
503 if (size != 0 && pinfo->pointer == NULL)
504 {
505 current_allocation -= size;
506 total_allocation -= size;
507 png_error(png_ptr,
508 "out of memory in pngtest->png_debug_malloc");
509 }
510 pinfo->next = pinformation;
511 pinformation = pinfo;
512 /* Make sure the caller isn't assuming zeroed memory. */
513 png_memset(pinfo->pointer, 0xdd, pinfo->size);
514 if (verbose)
515 printf("png_malloc %lu bytes at %x\n", (unsigned long)size,
516 pinfo->pointer);
517 return (png_voidp)(pinfo->pointer);
518 }
519}
520
521/* Free a pointer. It is removed from the list at the same time. */
522void
523png_debug_free(png_structp png_ptr, png_voidp ptr)
524{
525 if (png_ptr == NULL)
526 fprintf(STDERR, "NULL pointer to png_debug_free.\n");
527 if (ptr == 0)
528 {
529#if 0 /* This happens all the time. */
530 fprintf(STDERR, "WARNING: freeing NULL pointer\n");
531#endif
532 return;
533 }
534
535 /* Unlink the element from the list. */
536 {
537 memory_infop FAR *ppinfo = &pinformation;
538 for (;;)
539 {
540 memory_infop pinfo = *ppinfo;
541 if (pinfo->pointer == ptr)
542 {
543 *ppinfo = pinfo->next;
544 current_allocation -= pinfo->size;
545 if (current_allocation < 0)
546 fprintf(STDERR, "Duplicate free of memory\n");
547 /* We must free the list element too, but first kill
548 the memory that is to be freed. */
549 png_memset(ptr, 0x55, pinfo->size);
550 png_free_default(png_ptr, pinfo);
551 pinfo = NULL;
552 break;
553 }
554 if (pinfo->next == NULL)
555 {
556 fprintf(STDERR, "Pointer %x not found\n", (unsigned int)ptr);
557 break;
558 }
559 ppinfo = &pinfo->next;
560 }
561 }
562
563 /* Finally free the data. */
564 if (verbose)
565 printf("Freeing %x\n", ptr);
566 png_free_default(png_ptr, ptr);
567 ptr = NULL;
568}
569#endif /* PNG_USER_MEM_SUPPORTED && PNG_DEBUG */
570/* END of code to test memory allocation/deallocation */
571
572
573/* Demonstration of user chunk support of the sTER and vpAg chunks */
574#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
575
576/* (sTER is a public chunk not yet known by libpng. vpAg is a private
577chunk used in ImageMagick to store "virtual page" size). */
578
579static png_uint_32 user_chunk_data[4];
580
581 /* 0: sTER mode + 1
582 * 1: vpAg width
583 * 2: vpAg height
584 * 3: vpAg units
585 */
586
587static int read_user_chunk_callback(png_struct *png_ptr,
588 png_unknown_chunkp chunk)
589{
590 png_uint_32
591 *my_user_chunk_data;
592
593 /* Return one of the following:
594 * return (-n); chunk had an error
595 * return (0); did not recognize
596 * return (n); success
597 *
598 * The unknown chunk structure contains the chunk data:
599 * png_byte name[5];
600 * png_byte *data;
601 * png_size_t size;
602 *
603 * Note that libpng has already taken care of the CRC handling.
604 */
605
606 if (chunk->name[0] == 115 && chunk->name[1] == 84 && /* s T */
607 chunk->name[2] == 69 && chunk->name[3] == 82) /* E R */
608 {
609 /* Found sTER chunk */
610 if (chunk->size != 1)
611 return (-1); /* Error return */
612 if (chunk->data[0] != 0 && chunk->data[0] != 1)
613 return (-1); /* Invalid mode */
614 my_user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
615 my_user_chunk_data[0]=chunk->data[0]+1;
616 return (1);
617 }
618
619 if (chunk->name[0] != 118 || chunk->name[1] != 112 || /* v p */
620 chunk->name[2] != 65 || chunk->name[3] != 103) /* A g */
621 return (0); /* Did not recognize */
622
623 /* Found ImageMagick vpAg chunk */
624
625 if (chunk->size != 9)
626 return (-1); /* Error return */
627
628 my_user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
629
630 my_user_chunk_data[1]=png_get_uint_31(png_ptr, chunk->data);
631 my_user_chunk_data[2]=png_get_uint_31(png_ptr, chunk->data + 4);
632 my_user_chunk_data[3]=(png_uint_32)chunk->data[8];
633
634 return (1);
635
636}
637#endif
638/* END of code to demonstrate user chunk support */
639
640/* Test one file */
641int
642test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
643{
644 static png_FILE_p fpin;
645 static png_FILE_p fpout; /* "static" prevents setjmp corruption */
646 png_structp read_ptr;
647 png_infop read_info_ptr, end_info_ptr;
648#ifdef PNG_WRITE_SUPPORTED
649 png_structp write_ptr;
650 png_infop write_info_ptr;
651 png_infop write_end_info_ptr;
652#else
653 png_structp write_ptr = NULL;
654 png_infop write_info_ptr = NULL;
655 png_infop write_end_info_ptr = NULL;
656#endif
657 png_bytep row_buf;
658 png_uint_32 y;
659 png_uint_32 width, height;
660 int num_pass, pass;
661 int bit_depth, color_type;
662#ifdef PNG_SETJMP_SUPPORTED
663#ifdef USE_FAR_KEYWORD
664 jmp_buf jmpbuf;
665#endif
666#endif
667
668 char inbuf[256], outbuf[256];
669
670 row_buf = NULL;
671
672 if ((fpin = fopen(inname, "rb")) == NULL)
673 {
674 fprintf(STDERR, "Could not find input file %s\n", inname);
675 return (1);
676 }
677
678 if ((fpout = fopen(outname, "wb")) == NULL)
679 {
680 fprintf(STDERR, "Could not open output file %s\n", outname);
681 FCLOSE(fpin);
682 return (1);
683 }
684
685 png_debug(0, "Allocating read and write structures");
686#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
687 read_ptr =
688 png_create_read_struct_2(PNG_LIBPNG_VER_STRING, NULL,
689 NULL, NULL, NULL,
690 (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
691#else
692 read_ptr =
693 png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
694#endif
695#ifndef PNG_STDIO_SUPPORTED
696 png_set_error_fn(read_ptr, (png_voidp)inname, pngtest_error,
697 pngtest_warning);
698#endif
699
700#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
701 user_chunk_data[0] = 0;
702 user_chunk_data[1] = 0;
703 user_chunk_data[2] = 0;
704 user_chunk_data[3] = 0;
705 png_set_read_user_chunk_fn(read_ptr, user_chunk_data,
706 read_user_chunk_callback);
707
708#endif
709#ifdef PNG_WRITE_SUPPORTED
710#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
711 write_ptr =
712 png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL,
713 NULL, NULL, NULL, png_debug_malloc, png_debug_free);
714#else
715 write_ptr =
716 png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
717#endif
718#ifndef PNG_STDIO_SUPPORTED
719 png_set_error_fn(write_ptr, (png_voidp)inname, pngtest_error,
720 pngtest_warning);
721#endif
722#endif
723 png_debug(0, "Allocating read_info, write_info and end_info structures");
724 read_info_ptr = png_create_info_struct(read_ptr);
725 end_info_ptr = png_create_info_struct(read_ptr);
726#ifdef PNG_WRITE_SUPPORTED
727 write_info_ptr = png_create_info_struct(write_ptr);
728 write_end_info_ptr = png_create_info_struct(write_ptr);
729#endif
730
731#ifdef PNG_SETJMP_SUPPORTED
732 png_debug(0, "Setting jmpbuf for read struct");
733#ifdef USE_FAR_KEYWORD
734 if (setjmp(jmpbuf))
735#else
736 if (setjmp(png_jmpbuf(read_ptr)))
737#endif
738 {
739 fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
740 png_free(read_ptr, row_buf);
741 row_buf = NULL;
742 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
743#ifdef PNG_WRITE_SUPPORTED
744 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
745 png_destroy_write_struct(&write_ptr, &write_info_ptr);
746#endif
747 FCLOSE(fpin);
748 FCLOSE(fpout);
749 return (1);
750 }
751#ifdef USE_FAR_KEYWORD
752 png_memcpy(png_jmpbuf(read_ptr), jmpbuf, png_sizeof(jmp_buf));
753#endif
754
755#ifdef PNG_WRITE_SUPPORTED
756 png_debug(0, "Setting jmpbuf for write struct");
757#ifdef USE_FAR_KEYWORD
758 if (setjmp(jmpbuf))
759#else
760 if (setjmp(png_jmpbuf(write_ptr)))
761#endif
762 {
763 fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
764 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
765 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
766#ifdef PNG_WRITE_SUPPORTED
767 png_destroy_write_struct(&write_ptr, &write_info_ptr);
768#endif
769 FCLOSE(fpin);
770 FCLOSE(fpout);
771 return (1);
772 }
773#ifdef USE_FAR_KEYWORD
774 png_memcpy(png_jmpbuf(write_ptr), jmpbuf, png_sizeof(jmp_buf));
775#endif
776#endif
777#endif
778
779 png_debug(0, "Initializing input and output streams");
780#ifdef PNG_STDIO_SUPPORTED
781 png_init_io(read_ptr, fpin);
782# ifdef PNG_WRITE_SUPPORTED
783 png_init_io(write_ptr, fpout);
784# endif
785#else
786 png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data);
787# ifdef PNG_WRITE_SUPPORTED
788 png_set_write_fn(write_ptr, (png_voidp)fpout, pngtest_write_data,
789# ifdef PNG_WRITE_FLUSH_SUPPORTED
790 pngtest_flush);
791# else
792 NULL);
793# endif
794# endif
795#endif
796 if (status_dots_requested == 1)
797 {
798#ifdef PNG_WRITE_SUPPORTED
799 png_set_write_status_fn(write_ptr, write_row_callback);
800#endif
801 png_set_read_status_fn(read_ptr, read_row_callback);
802 }
803 else
804 {
805#ifdef PNG_WRITE_SUPPORTED
806 png_set_write_status_fn(write_ptr, NULL);
807#endif
808 png_set_read_status_fn(read_ptr, NULL);
809 }
810
811#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
812 {
813 int i;
814 for (i = 0; i<256; i++)
815 filters_used[i] = 0;
816 png_set_read_user_transform_fn(read_ptr, count_filters);
817 }
818#endif
819#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
820 zero_samples = 0;
821 png_set_write_user_transform_fn(write_ptr, count_zero_samples);
822#endif
823
824#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
825# ifndef PNG_HANDLE_CHUNK_ALWAYS
826# define PNG_HANDLE_CHUNK_ALWAYS 3
827# endif
828 png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS,
829 NULL, 0);
830#endif
831#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
832# ifndef PNG_HANDLE_CHUNK_IF_SAFE
833# define PNG_HANDLE_CHUNK_IF_SAFE 2
834# endif
835 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_IF_SAFE,
836 NULL, 0);
837#endif
838
839 png_debug(0, "Reading info struct");
840 png_read_info(read_ptr, read_info_ptr);
841
842 png_debug(0, "Transferring info struct");
843 {
844 int interlace_type, compression_type, filter_type;
845
846 if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth,
847 &color_type, &interlace_type, &compression_type, &filter_type))
848 {
849 png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth,
850#ifdef PNG_WRITE_INTERLACING_SUPPORTED
851 color_type, interlace_type, compression_type, filter_type);
852#else
853 color_type, PNG_INTERLACE_NONE, compression_type, filter_type);
854#endif
855 }
856 }
857#ifdef PNG_FIXED_POINT_SUPPORTED
858#ifdef PNG_cHRM_SUPPORTED
859 {
860 png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
861 blue_y;
862 if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
863 &red_y, &green_x, &green_y, &blue_x, &blue_y))
864 {
865 png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x,
866 red_y, green_x, green_y, blue_x, blue_y);
867 }
868 }
869#endif
870#ifdef PNG_gAMA_SUPPORTED
871 {
872 png_fixed_point gamma;
873
874 if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma))
875 png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma);
876 }
877#endif
878#else /* Use floating point versions */
879#ifdef PNG_FLOATING_POINT_SUPPORTED
880#ifdef PNG_cHRM_SUPPORTED
881 {
882 double white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
883 blue_y;
884 if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
885 &red_y, &green_x, &green_y, &blue_x, &blue_y))
886 {
887 png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x,
888 red_y, green_x, green_y, blue_x, blue_y);
889 }
890 }
891#endif
892#ifdef PNG_gAMA_SUPPORTED
893 {
894 double gamma;
895
896 if (png_get_gAMA(read_ptr, read_info_ptr, &gamma))
897 png_set_gAMA(write_ptr, write_info_ptr, gamma);
898 }
899#endif
900#endif /* Floating point */
901#endif /* Fixed point */
902#ifdef PNG_iCCP_SUPPORTED
903 {
904 png_charp name;
905 png_charp profile;
906 png_uint_32 proflen;
907 int compression_type;
908
909 if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type,
910 &profile, &proflen))
911 {
912 png_set_iCCP(write_ptr, write_info_ptr, name, compression_type,
913 profile, proflen);
914 }
915 }
916#endif
917#ifdef PNG_sRGB_SUPPORTED
918 {
919 int intent;
920
921 if (png_get_sRGB(read_ptr, read_info_ptr, &intent))
922 png_set_sRGB(write_ptr, write_info_ptr, intent);
923 }
924#endif
925 {
926 png_colorp palette;
927 int num_palette;
928
929 if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette))
930 png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
931 }
932#ifdef PNG_bKGD_SUPPORTED
933 {
934 png_color_16p background;
935
936 if (png_get_bKGD(read_ptr, read_info_ptr, &background))
937 {
938 png_set_bKGD(write_ptr, write_info_ptr, background);
939 }
940 }
941#endif
942#ifdef PNG_hIST_SUPPORTED
943 {
944 png_uint_16p hist;
945
946 if (png_get_hIST(read_ptr, read_info_ptr, &hist))
947 png_set_hIST(write_ptr, write_info_ptr, hist);
948 }
949#endif
950#ifdef PNG_oFFs_SUPPORTED
951 {
952 png_int_32 offset_x, offset_y;
953 int unit_type;
954
955 if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y,
956 &unit_type))
957 {
958 png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
959 }
960 }
961#endif
962#ifdef PNG_pCAL_SUPPORTED
963 {
964 png_charp purpose, units;
965 png_charpp params;
966 png_int_32 X0, X1;
967 int type, nparams;
968
969 if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type,
970 &nparams, &units, &params))
971 {
972 png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type,
973 nparams, units, params);
974 }
975 }
976#endif
977#ifdef PNG_pHYs_SUPPORTED
978 {
979 png_uint_32 res_x, res_y;
980 int unit_type;
981
982 if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y, &unit_type))
983 png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type);
984 }
985#endif
986#ifdef PNG_sBIT_SUPPORTED
987 {
988 png_color_8p sig_bit;
989
990 if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit))
991 png_set_sBIT(write_ptr, write_info_ptr, sig_bit);
992 }
993#endif
994#ifdef PNG_sCAL_SUPPORTED
995#ifdef PNG_FLOATING_POINT_SUPPORTED
996 {
997 int unit;
998 double scal_width, scal_height;
999
1000 if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width,
1001 &scal_height))
1002 {
1003 png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height);
1004 }
1005 }
1006#else
1007#ifdef PNG_FIXED_POINT_SUPPORTED
1008 {
1009 int unit;
1010 png_charp scal_width, scal_height;
1011
1012 if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width,
1013 &scal_height))
1014 {
1015 png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width, scal_height);
1016 }
1017 }
1018#endif
1019#endif
1020#endif
1021#ifdef PNG_TEXT_SUPPORTED
1022 {
1023 png_textp text_ptr;
1024 int num_text;
1025
1026 if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
1027 {
1028 png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks", num_text);
1029 png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
1030 }
1031 }
1032#endif
1033#ifdef PNG_tIME_SUPPORTED
1034 {
1035 png_timep mod_time;
1036
1037 if (png_get_tIME(read_ptr, read_info_ptr, &mod_time))
1038 {
1039 png_set_tIME(write_ptr, write_info_ptr, mod_time);
1040#ifdef PNG_TIME_RFC1123_SUPPORTED
1041 /* We have to use png_memcpy instead of "=" because the string
1042 * pointed to by png_convert_to_rfc1123() gets free'ed before
1043 * we use it.
1044 */
1045 png_memcpy(tIME_string,
1046 png_convert_to_rfc1123(read_ptr, mod_time),
1047 png_sizeof(tIME_string));
1048 tIME_string[png_sizeof(tIME_string) - 1] = '\0';
1049 tIME_chunk_present++;
1050#endif /* PNG_TIME_RFC1123_SUPPORTED */
1051 }
1052 }
1053#endif
1054#ifdef PNG_tRNS_SUPPORTED
1055 {
1056 png_bytep trans_alpha;
1057 int num_trans;
1058 png_color_16p trans_color;
1059
1060 if (png_get_tRNS(read_ptr, read_info_ptr, &trans_alpha, &num_trans,
1061 &trans_color))
1062 {
1063 int sample_max = (1 << bit_depth);
1064 /* libpng doesn't reject a tRNS chunk with out-of-range samples */
1065 if (!((color_type == PNG_COLOR_TYPE_GRAY &&
1066 (int)trans_color->gray > sample_max) ||
1067 (color_type == PNG_COLOR_TYPE_RGB &&
1068 ((int)trans_color->red > sample_max ||
1069 (int)trans_color->green > sample_max ||
1070 (int)trans_color->blue > sample_max))))
1071 png_set_tRNS(write_ptr, write_info_ptr, trans_alpha, num_trans,
1072 trans_color);
1073 }
1074 }
1075#endif
1076#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1077 {
1078 png_unknown_chunkp unknowns;
1079 int num_unknowns = (int)png_get_unknown_chunks(read_ptr, read_info_ptr,
1080 &unknowns);
1081 if (num_unknowns)
1082 {
1083 png_size_t i;
1084 png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns,
1085 num_unknowns);
1086 /* Copy the locations from the read_info_ptr. The automatically
1087 * generated locations in write_info_ptr are wrong because we
1088 * haven't written anything yet.
1089 */
1090 for (i = 0; i < (png_size_t)num_unknowns; i++)
1091 png_set_unknown_chunk_location(write_ptr, write_info_ptr, i,
1092 unknowns[i].location);
1093 }
1094 }
1095#endif
1096
1097#ifdef PNG_WRITE_SUPPORTED
1098 png_debug(0, "Writing info struct");
1099
1100/* If we wanted, we could write info in two steps:
1101 * png_write_info_before_PLTE(write_ptr, write_info_ptr);
1102 */
1103 png_write_info(write_ptr, write_info_ptr);
1104
1105#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
1106 if (user_chunk_data[0] != 0)
1107 {
1108 png_byte png_sTER[5] = {115, 84, 69, 82, '\0'};
1109
1110 unsigned char
1111 ster_chunk_data[1];
1112
1113 if (verbose)
1114 fprintf(STDERR, "\n stereo mode = %lu\n",
1115 (unsigned long)(user_chunk_data[0] - 1));
1116 ster_chunk_data[0]=(unsigned char)(user_chunk_data[0] - 1);
1117 png_write_chunk(write_ptr, png_sTER, ster_chunk_data, 1);
1118 }
1119 if (user_chunk_data[1] != 0 || user_chunk_data[2] != 0)
1120 {
1121 png_byte png_vpAg[5] = {118, 112, 65, 103, '\0'};
1122
1123 unsigned char
1124 vpag_chunk_data[9];
1125
1126 if (verbose)
1127 fprintf(STDERR, " vpAg = %lu x %lu, units = %lu\n",
1128 (unsigned long)user_chunk_data[1],
1129 (unsigned long)user_chunk_data[2],
1130 (unsigned long)user_chunk_data[3]);
1131 png_save_uint_32(vpag_chunk_data, user_chunk_data[1]);
1132 png_save_uint_32(vpag_chunk_data + 4, user_chunk_data[2]);
1133 vpag_chunk_data[8] = (unsigned char)(user_chunk_data[3] & 0xff);
1134 png_write_chunk(write_ptr, png_vpAg, vpag_chunk_data, 9);
1135 }
1136
1137#endif
1138#endif
1139
1140#ifdef SINGLE_ROWBUF_ALLOC
1141 png_debug(0, "Allocating row buffer...");
1142 row_buf = (png_bytep)png_malloc(read_ptr,
1143 png_get_rowbytes(read_ptr, read_info_ptr));
1144 png_debug1(0, "0x%08lx", (unsigned long)row_buf);
1145#endif /* SINGLE_ROWBUF_ALLOC */
1146 png_debug(0, "Writing row data");
1147
1148#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
1149 defined(PNG_WRITE_INTERLACING_SUPPORTED)
1150 num_pass = png_set_interlace_handling(read_ptr);
1151# ifdef PNG_WRITE_SUPPORTED
1152 png_set_interlace_handling(write_ptr);
1153# endif
1154#else
1155 num_pass = 1;
1156#endif
1157
1158#ifdef PNGTEST_TIMING
1159 t_stop = (float)clock();
1160 t_misc += (t_stop - t_start);
1161 t_start = t_stop;
1162#endif
1163 for (pass = 0; pass < num_pass; pass++)
1164 {
1165 png_debug1(0, "Writing row data for pass %d", pass);
1166 for (y = 0; y < height; y++)
1167 {
1168#ifndef SINGLE_ROWBUF_ALLOC
1169 png_debug2(0, "Allocating row buffer (pass %d, y = %ld)...", pass, y);
1170 row_buf = (png_bytep)png_malloc(read_ptr,
1171 png_get_rowbytes(read_ptr, read_info_ptr));
1172 png_debug2(0, "0x%08lx (%ld bytes)", (unsigned long)row_buf,
1173 png_get_rowbytes(read_ptr, read_info_ptr));
1174#endif /* !SINGLE_ROWBUF_ALLOC */
1175 png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1);
1176
1177#ifdef PNG_WRITE_SUPPORTED
1178#ifdef PNGTEST_TIMING
1179 t_stop = (float)clock();
1180 t_decode += (t_stop - t_start);
1181 t_start = t_stop;
1182#endif
1183 png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
1184#ifdef PNGTEST_TIMING
1185 t_stop = (float)clock();
1186 t_encode += (t_stop - t_start);
1187 t_start = t_stop;
1188#endif
1189#endif /* PNG_WRITE_SUPPORTED */
1190
1191#ifndef SINGLE_ROWBUF_ALLOC
1192 png_debug2(0, "Freeing row buffer (pass %d, y = %ld)", pass, y);
1193 png_free(read_ptr, row_buf);
1194 row_buf = NULL;
1195#endif /* !SINGLE_ROWBUF_ALLOC */
1196 }
1197 }
1198
1199#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1200 png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1);
1201#endif
1202#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1203 png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
1204#endif
1205
1206 png_debug(0, "Reading and writing end_info data");
1207
1208 png_read_end(read_ptr, end_info_ptr);
1209#ifdef PNG_TEXT_SUPPORTED
1210 {
1211 png_textp text_ptr;
1212 int num_text;
1213
1214 if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
1215 {
1216 png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks", num_text);
1217 png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
1218 }
1219 }
1220#endif
1221#ifdef PNG_tIME_SUPPORTED
1222 {
1223 png_timep mod_time;
1224
1225 if (png_get_tIME(read_ptr, end_info_ptr, &mod_time))
1226 {
1227 png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
1228#ifdef PNG_TIME_RFC1123_SUPPORTED
1229 /* We have to use png_memcpy instead of "=" because the string
1230 pointed to by png_convert_to_rfc1123() gets free'ed before
1231 we use it */
1232 png_memcpy(tIME_string,
1233 png_convert_to_rfc1123(read_ptr, mod_time),
1234 png_sizeof(tIME_string));
1235 tIME_string[png_sizeof(tIME_string) - 1] = '\0';
1236 tIME_chunk_present++;
1237#endif /* PNG_TIME_RFC1123_SUPPORTED */
1238 }
1239 }
1240#endif
1241#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1242 {
1243 png_unknown_chunkp unknowns;
1244 int num_unknowns;
1245 num_unknowns = (int)png_get_unknown_chunks(read_ptr, end_info_ptr,
1246 &unknowns);
1247 if (num_unknowns)
1248 {
1249 png_size_t i;
1250 png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns,
1251 num_unknowns);
1252 /* Copy the locations from the read_info_ptr. The automatically
1253 * generated locations in write_end_info_ptr are wrong because we
1254 * haven't written the end_info yet.
1255 */
1256 for (i = 0; i < (png_size_t)num_unknowns; i++)
1257 png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i,
1258 unknowns[i].location);
1259 }
1260 }
1261#endif
1262#ifdef PNG_WRITE_SUPPORTED
1263 png_write_end(write_ptr, write_end_info_ptr);
1264#endif
1265
1266#ifdef PNG_EASY_ACCESS_SUPPORTED
1267 if (verbose)
1268 {
1269 png_uint_32 iwidth, iheight;
1270 iwidth = png_get_image_width(write_ptr, write_info_ptr);
1271 iheight = png_get_image_height(write_ptr, write_info_ptr);
1272 fprintf(STDERR, "\n Image width = %lu, height = %lu\n",
1273 (unsigned long)iwidth, (unsigned long)iheight);
1274 }
1275#endif
1276
1277 png_debug(0, "Destroying data structs");
1278#ifdef SINGLE_ROWBUF_ALLOC
1279 png_debug(1, "destroying row_buf for read_ptr");
1280 png_free(read_ptr, row_buf);
1281 row_buf = NULL;
1282#endif /* SINGLE_ROWBUF_ALLOC */
1283 png_debug(1, "destroying read_ptr, read_info_ptr, end_info_ptr");
1284 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
1285#ifdef PNG_WRITE_SUPPORTED
1286 png_debug(1, "destroying write_end_info_ptr");
1287 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
1288 png_debug(1, "destroying write_ptr, write_info_ptr");
1289 png_destroy_write_struct(&write_ptr, &write_info_ptr);
1290#endif
1291 png_debug(0, "Destruction complete.");
1292
1293 FCLOSE(fpin);
1294 FCLOSE(fpout);
1295
1296 png_debug(0, "Opening files for comparison");
1297 if ((fpin = fopen(inname, "rb")) == NULL)
1298 {
1299 fprintf(STDERR, "Could not find file %s\n", inname);
1300 return (1);
1301 }
1302
1303 if ((fpout = fopen(outname, "rb")) == NULL)
1304 {
1305 fprintf(STDERR, "Could not find file %s\n", outname);
1306 FCLOSE(fpin);
1307 return (1);
1308 }
1309
1310 for (;;)
1311 {
1312 png_size_t num_in, num_out;
1313
1314 num_in = fread(inbuf, 1, 1, fpin);
1315 num_out = fread(outbuf, 1, 1, fpout);
1316
1317 if (num_in != num_out)
1318 {
1319 fprintf(STDERR, "\nFiles %s and %s are of a different size\n",
1320 inname, outname);
1321 if (wrote_question == 0)
1322 {
1323 fprintf(STDERR,
1324 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1325 inname, PNG_ZBUF_SIZE);
1326 fprintf(STDERR,
1327 "\n filtering heuristic (libpng default), compression");
1328 fprintf(STDERR,
1329 " level (zlib default),\n and zlib version (%s)?\n\n",
1330 ZLIB_VERSION);
1331 wrote_question = 1;
1332 }
1333 FCLOSE(fpin);
1334 FCLOSE(fpout);
1335 return (0);
1336 }
1337
1338 if (!num_in)
1339 break;
1340
1341 if (png_memcmp(inbuf, outbuf, num_in))
1342 {
1343 fprintf(STDERR, "\nFiles %s and %s are different\n", inname, outname);
1344 if (wrote_question == 0)
1345 {
1346 fprintf(STDERR,
1347 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1348 inname, PNG_ZBUF_SIZE);
1349 fprintf(STDERR,
1350 "\n filtering heuristic (libpng default), compression");
1351 fprintf(STDERR,
1352 " level (zlib default),\n and zlib version (%s)?\n\n",
1353 ZLIB_VERSION);
1354 wrote_question = 1;
1355 }
1356 FCLOSE(fpin);
1357 FCLOSE(fpout);
1358 return (0);
1359 }
1360 }
1361
1362 FCLOSE(fpin);
1363 FCLOSE(fpout);
1364
1365 return (0);
1366}
1367
1368/* Input and output filenames */
1369#ifdef RISCOS
1370static PNG_CONST char *inname = "pngtest/png";
1371static PNG_CONST char *outname = "pngout/png";
1372#else
1373static PNG_CONST char *inname = "pngtest.png";
1374static PNG_CONST char *outname = "pngout.png";
1375#endif
1376
1377int
1378main(int argc, char *argv[])
1379{
1380 int multiple = 0;
1381 int ierror = 0;
1382
1383 fprintf(STDERR, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
1384 fprintf(STDERR, " with zlib version %s\n", ZLIB_VERSION);
1385 fprintf(STDERR, "%s", png_get_copyright(NULL));
1386 /* Show the version of libpng used in building the library */
1387 fprintf(STDERR, " library (%lu):%s",
1388 (unsigned long)png_access_version_number(),
1389 png_get_header_version(NULL));
1390 /* Show the version of libpng used in building the application */
1391 fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
1392 PNG_HEADER_VERSION_STRING);
1393 fprintf(STDERR, " sizeof(png_struct)=%ld, sizeof(png_info)=%ld\n",
1394 (long)png_sizeof(png_struct), (long)png_sizeof(png_info));
1395
1396 /* Do some consistency checking on the memory allocation settings, I'm
1397 * not sure this matters, but it is nice to know, the first of these
1398 * tests should be impossible because of the way the macros are set
1399 * in pngconf.h
1400 */
1401#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1402 fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n");
1403#endif
1404 /* I think the following can happen. */
1405#if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1406 fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n");
1407#endif
1408
1409 if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING))
1410 {
1411 fprintf(STDERR,
1412 "Warning: versions are different between png.h and png.c\n");
1413 fprintf(STDERR, " png.h version: %s\n", PNG_LIBPNG_VER_STRING);
1414 fprintf(STDERR, " png.c version: %s\n\n", png_libpng_ver);
1415 ++ierror;
1416 }
1417
1418 if (argc > 1)
1419 {
1420 if (strcmp(argv[1], "-m") == 0)
1421 {
1422 multiple = 1;
1423 status_dots_requested = 0;
1424 }
1425 else if (strcmp(argv[1], "-mv") == 0 ||
1426 strcmp(argv[1], "-vm") == 0 )
1427 {
1428 multiple = 1;
1429 verbose = 1;
1430 status_dots_requested = 1;
1431 }
1432 else if (strcmp(argv[1], "-v") == 0)
1433 {
1434 verbose = 1;
1435 status_dots_requested = 1;
1436 inname = argv[2];
1437 }
1438 else
1439 {
1440 inname = argv[1];
1441 status_dots_requested = 0;
1442 }
1443 }
1444
1445 if (!multiple && argc == 3 + verbose)
1446 outname = argv[2 + verbose];
1447
1448 if ((!multiple && argc > 3 + verbose) || (multiple && argc < 2))
1449 {
1450 fprintf(STDERR,
1451 "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
1452 argv[0], argv[0]);
1453 fprintf(STDERR,
1454 " reads/writes one PNG file (without -m) or multiple files (-m)\n");
1455 fprintf(STDERR,
1456 " with -m %s is used as a temporary file\n", outname);
1457 exit(1);
1458 }
1459
1460 if (multiple)
1461 {
1462 int i;
1463#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1464 int allocation_now = current_allocation;
1465#endif
1466 for (i=2; i<argc; ++i)
1467 {
1468#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1469 int k;
1470#endif
1471 int kerror;
1472 fprintf(STDERR, "\n Testing %s:", argv[i]);
1473 kerror = test_one_file(argv[i], outname);
1474 if (kerror == 0)
1475 {
1476#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1477 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1478 (unsigned long)zero_samples);
1479#else
1480 fprintf(STDERR, " PASS\n");
1481#endif
1482#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1483 for (k = 0; k<256; k++)
1484 if (filters_used[k])
1485 fprintf(STDERR, " Filter %d was used %lu times\n",
1486 k, (unsigned long)filters_used[k]);
1487#endif
1488#ifdef PNG_TIME_RFC1123_SUPPORTED
1489 if (tIME_chunk_present != 0)
1490 fprintf(STDERR, " tIME = %s\n", tIME_string);
1491 tIME_chunk_present = 0;
1492#endif /* PNG_TIME_RFC1123_SUPPORTED */
1493 }
1494 else
1495 {
1496 fprintf(STDERR, " FAIL\n");
1497 ierror += kerror;
1498 }
1499#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1500 if (allocation_now != current_allocation)
1501 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1502 current_allocation - allocation_now);
1503 if (current_allocation != 0)
1504 {
1505 memory_infop pinfo = pinformation;
1506
1507 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1508 current_allocation);
1509 while (pinfo != NULL)
1510 {
1511 fprintf(STDERR, " %lu bytes at %x\n",
1512 (unsigned long)pinfo->size,
1513 (unsigned int) pinfo->pointer);
1514 pinfo = pinfo->next;
1515 }
1516 }
1517#endif
1518 }
1519#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1520 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1521 current_allocation);
1522 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1523 maximum_allocation);
1524 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1525 total_allocation);
1526 fprintf(STDERR, " Number of allocations: %10d\n",
1527 num_allocations);
1528#endif
1529 }
1530 else
1531 {
1532 int i;
1533 for (i = 0; i<3; ++i)
1534 {
1535 int kerror;
1536#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1537 int allocation_now = current_allocation;
1538#endif
1539 if (i == 1) status_dots_requested = 1;
1540 else if (verbose == 0)status_dots_requested = 0;
1541 if (i == 0 || verbose == 1 || ierror != 0)
1542 fprintf(STDERR, "\n Testing %s:", inname);
1543 kerror = test_one_file(inname, outname);
1544 if (kerror == 0)
1545 {
1546 if (verbose == 1 || i == 2)
1547 {
1548#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1549 int k;
1550#endif
1551#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1552 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1553 (unsigned long)zero_samples);
1554#else
1555 fprintf(STDERR, " PASS\n");
1556#endif
1557#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1558 for (k = 0; k<256; k++)
1559 if (filters_used[k])
1560 fprintf(STDERR, " Filter %d was used %lu times\n",
1561 k,
1562 (unsigned long)filters_used[k]);
1563#endif
1564#ifdef PNG_TIME_RFC1123_SUPPORTED
1565 if (tIME_chunk_present != 0)
1566 fprintf(STDERR, " tIME = %s\n", tIME_string);
1567#endif /* PNG_TIME_RFC1123_SUPPORTED */
1568 }
1569 }
1570 else
1571 {
1572 if (verbose == 0 && i != 2)
1573 fprintf(STDERR, "\n Testing %s:", inname);
1574 fprintf(STDERR, " FAIL\n");
1575 ierror += kerror;
1576 }
1577#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1578 if (allocation_now != current_allocation)
1579 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1580 current_allocation - allocation_now);
1581 if (current_allocation != 0)
1582 {
1583 memory_infop pinfo = pinformation;
1584
1585 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1586 current_allocation);
1587 while (pinfo != NULL)
1588 {
1589 fprintf(STDERR, " %lu bytes at %x\n",
1590 (unsigned long)pinfo->size, (unsigned int)pinfo->pointer);
1591 pinfo = pinfo->next;
1592 }
1593 }
1594#endif
1595 }
1596#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1597 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1598 current_allocation);
1599 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1600 maximum_allocation);
1601 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1602 total_allocation);
1603 fprintf(STDERR, " Number of allocations: %10d\n",
1604 num_allocations);
1605#endif
1606 }
1607
1608#ifdef PNGTEST_TIMING
1609 t_stop = (float)clock();
1610 t_misc += (t_stop - t_start);
1611 t_start = t_stop;
1612 fprintf(STDERR, " CPU time used = %.3f seconds",
1613 (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC);
1614 fprintf(STDERR, " (decoding %.3f,\n",
1615 t_decode/(float)CLOCKS_PER_SEC);
1616 fprintf(STDERR, " encoding %.3f ,",
1617 t_encode/(float)CLOCKS_PER_SEC);
1618 fprintf(STDERR, " other %.3f seconds)\n\n",
1619 t_misc/(float)CLOCKS_PER_SEC);
1620#endif
1621
1622 if (ierror == 0)
1623 fprintf(STDERR, " libpng passes test\n");
1624 else
1625 fprintf(STDERR, " libpng FAILS test\n");
1626 return (int)(ierror != 0);
1627}
1628
1629/* Generate a compiler error if there is an old png.h in the search path. */
1630typedef version_1_4_0 your_png_h_is_not_version_1_4_0;
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