2
/* pngtest.c - a simple test program to test libpng
4
* Last changed in libpng 1.5.25 [December 3, 2015]
5
* Copyright (c) 1998-2002,2004,2006-2015 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.)
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
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
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.
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 ..."
34
#define _POSIX_SOURCE 1
40
/* Defined so I can write to a file on gui/windowing platforms */
41
/* #define STDERR stderr */
42
#define STDERR stdout /* For DOS */
46
/* 1.6.1 added support for the configure test harness, which uses 77 to indicate
47
* a skipped test, in earlier versions we need to succeed on a skipped test, so:
49
#if PNG_LIBPNG_VER >= 10601 && defined(HAVE_CONFIG_H)
55
/* Known chunks that exist in pngtest.png must be supported or pngtest will fail
56
* simply as a result of re-ordering them. This may be fixed in 1.7
58
* pngtest allocates a single row buffer for each row and overwrites it,
59
* therefore if the write side doesn't support the writing of interlaced images
60
* nothing can be done for an interlaced image (and the code below will fail
61
* horribly trying to write extra data after writing garbage).
63
#if defined PNG_READ_SUPPORTED && /* else nothing can be done */\
64
defined PNG_READ_bKGD_SUPPORTED &&\
65
defined PNG_READ_cHRM_SUPPORTED &&\
66
defined PNG_READ_gAMA_SUPPORTED &&\
67
defined PNG_READ_oFFs_SUPPORTED &&\
68
defined PNG_READ_pCAL_SUPPORTED &&\
69
defined PNG_READ_pHYs_SUPPORTED &&\
70
defined PNG_READ_sBIT_SUPPORTED &&\
71
defined PNG_READ_sCAL_SUPPORTED &&\
72
defined PNG_READ_sRGB_SUPPORTED &&\
73
defined PNG_READ_sPLT_SUPPORTED &&\
74
defined PNG_READ_tEXt_SUPPORTED &&\
75
defined PNG_READ_tIME_SUPPORTED &&\
76
defined PNG_READ_zTXt_SUPPORTED &&\
77
(defined PNG_WRITE_INTERLACING_SUPPORTED || PNG_LIBPNG_VER >= 10700)
79
#ifdef PNG_ZLIB_HEADER
80
# include PNG_ZLIB_HEADER /* defined by pnglibconf.h from 1.7 */
85
/* Copied from pngpriv.h but only used in error messages below. */
87
# define PNG_ZBUF_SIZE 8192
89
#define FCLOSE(file) fclose(file)
91
#ifndef PNG_STDIO_SUPPORTED
92
typedef FILE * png_FILE_p;
95
/* Makes pngtest verbose so we can find problems. */
101
# define pngtest_debug(m) ((void)fprintf(stderr, m "\n"))
102
# define pngtest_debug1(m,p1) ((void)fprintf(stderr, m "\n", p1))
103
# define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2))
105
# define pngtest_debug(m) ((void)0)
106
# define pngtest_debug1(m,p1) ((void)0)
107
# define pngtest_debug2(m,p1,p2) ((void)0)
111
# define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */
115
# define PNG_UNUSED(param) (void)param;
118
/* Turn on CPU timing
119
#define PNGTEST_TIMING
122
#ifndef PNG_FLOATING_POINT_SUPPORTED
123
#undef PNGTEST_TIMING
126
#ifdef PNGTEST_TIMING
127
static float t_start, t_stop, t_decode, t_encode, t_misc;
131
#ifdef PNG_TIME_RFC1123_SUPPORTED
132
#define PNG_tIME_STRING_LENGTH 29
133
static int tIME_chunk_present = 0;
134
static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present";
136
#if PNG_LIBPNG_VER < 10619
137
#define png_convert_to_rfc1123_buffer(ts, t) tIME_to_str(read_ptr, ts, t)
140
tIME_to_str(png_structp png_ptr, png_charp ts, png_const_timep t)
142
png_const_charp str = png_convert_to_rfc1123(png_ptr, t);
150
#endif /* older libpng */
153
static int verbose = 0;
154
static int strict = 0;
155
static int relaxed = 0;
156
static int unsupported_chunks = 0; /* chunk unsupported by libpng in input */
157
static int error_count = 0; /* count calls to png_error */
158
static int warning_count = 0; /* count calls to png_warning */
160
/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
162
# define png_jmpbuf(png_ptr) png_ptr->jmpbuf
165
/* Defines for unknown chunk handling if required. */
166
#ifndef PNG_HANDLE_CHUNK_ALWAYS
167
# define PNG_HANDLE_CHUNK_ALWAYS 3
169
#ifndef PNG_HANDLE_CHUNK_IF_SAFE
170
# define PNG_HANDLE_CHUNK_IF_SAFE 2
173
/* Utility to save typing/errors, the argument must be a name */
174
#define MEMZERO(var) ((void)memset(&var, 0, sizeof var))
176
/* Example of using row callbacks to make a simple progress meter */
177
static int status_pass = 1;
178
static int status_dots_requested = 0;
179
static int status_dots = 1;
182
read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
184
if (png_ptr == NULL || row_number > PNG_UINT_31_MAX)
187
if (status_pass != pass)
189
fprintf(stdout, "\n Pass %d: ", pass);
196
if (status_dots == 0)
198
fprintf(stdout, "\n ");
202
fprintf(stdout, "r");
205
#ifdef PNG_WRITE_SUPPORTED
207
write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
209
if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7)
212
fprintf(stdout, "w");
217
#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
218
/* Example of using a user transform callback (doesn't do anything at present).
221
read_user_callback(png_structp png_ptr, png_row_infop row_info, png_bytep data)
229
#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
230
/* Example of using user transform callback (we don't transform anything,
231
* but merely count the zero samples)
234
static png_uint_32 zero_samples;
237
count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
243
/* Contents of row_info:
244
* png_uint_32 width width of row
245
* png_uint_32 rowbytes number of bytes in row
246
* png_byte color_type color type of pixels
247
* png_byte bit_depth bit depth of samples
248
* png_byte channels number of channels (1-4)
249
* png_byte pixel_depth bits per pixel (depth*channels)
252
/* Counts the number of zero samples (or zero pixels if color_type is 3 */
254
if (row_info->color_type == 0 || row_info->color_type == 3)
257
png_uint_32 n, nstop;
259
for (n = 0, nstop=row_info->width; n<nstop; n++)
261
if (row_info->bit_depth == 1)
263
if (((*dp << pos++ ) & 0x80) == 0)
273
if (row_info->bit_depth == 2)
275
if (((*dp << (pos+=2)) & 0xc0) == 0)
285
if (row_info->bit_depth == 4)
287
if (((*dp << (pos+=4)) & 0xf0) == 0)
297
if (row_info->bit_depth == 8)
301
if (row_info->bit_depth == 16)
303
if ((*dp | *(dp+1)) == 0)
309
else /* Other color types */
311
png_uint_32 n, nstop;
313
int color_channels = row_info->channels;
314
if (row_info->color_type > 3)
317
for (n = 0, nstop=row_info->width; n<nstop; n++)
319
for (channel = 0; channel < color_channels; channel++)
321
if (row_info->bit_depth == 8)
325
if (row_info->bit_depth == 16)
327
if ((*dp | *(dp+1)) == 0)
333
if (row_info->color_type > 3)
336
if (row_info->bit_depth == 16)
342
#endif /* WRITE_USER_TRANSFORM */
344
#ifndef PNG_STDIO_SUPPORTED
345
/* START of code to validate stdio-free compilation */
346
/* These copies of the default read/write functions come from pngrio.c and
347
* pngwio.c. They allow "don't include stdio" testing of the library.
348
* This is the function that does the actual reading of data. If you are
349
* not reading from a standard C stream, you should create a replacement
350
* read_data function and use it at run time with png_set_read_fn(), rather
351
* than changing the library.
354
#ifdef PNG_IO_STATE_SUPPORTED
356
pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
359
pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
362
png_uint_32 io_state = png_get_io_state(png_ptr);
365
/* Check if the current operation (reading / writing) is as expected. */
366
if ((io_state & PNG_IO_MASK_OP) != io_op)
367
png_error(png_ptr, "Incorrect operation in I/O state");
369
/* Check if the buffer size specific to the current location
370
* (file signature / header / data / crc) is as expected.
372
switch (io_state & PNG_IO_MASK_LOC)
374
case PNG_IO_SIGNATURE:
378
case PNG_IO_CHUNK_HDR:
379
if (data_length != 8)
382
case PNG_IO_CHUNK_DATA:
383
break; /* no restrictions here */
384
case PNG_IO_CHUNK_CRC:
385
if (data_length != 4)
389
err = 1; /* uninitialized */
392
png_error(png_ptr, "Bad I/O state or buffer size");
397
pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
399
png_size_t check = 0;
402
/* fread() returns 0 on error, so it is OK to store this in a png_size_t
403
* instead of an int, which is what fread() actually returns.
405
io_ptr = png_get_io_ptr(png_ptr);
408
check = fread(data, 1, length, (png_FILE_p)io_ptr);
413
png_error(png_ptr, "Read Error");
416
#ifdef PNG_IO_STATE_SUPPORTED
417
pngtest_check_io_state(png_ptr, length, PNG_IO_READING);
421
#ifdef PNG_WRITE_FLUSH_SUPPORTED
423
pngtest_flush(png_structp png_ptr)
425
/* Do nothing; fflush() is said to be just a waste of energy. */
426
PNG_UNUSED(png_ptr) /* Stifle compiler warning */
430
/* This is the function that does the actual writing of data. If you are
431
* not writing to a standard C stream, you should create a replacement
432
* write_data function and use it at run time with png_set_write_fn(), rather
433
* than changing the library.
436
pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
440
check = fwrite(data, 1, length, (png_FILE_p)png_get_io_ptr(png_ptr));
444
png_error(png_ptr, "Write Error");
447
#ifdef PNG_IO_STATE_SUPPORTED
448
pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING);
453
/* This function is called when there is a warning, but the library thinks
454
* it can continue anyway. Replacement functions don't have to do anything
455
* here if you don't want to. In the default configuration, png_ptr is
456
* not used, but it is passed in case it may be useful.
460
PNG_CONST char *file_name;
461
} pngtest_error_parameters;
464
pngtest_warning(png_structp png_ptr, png_const_charp message)
466
PNG_CONST char *name = "UNKNOWN (ERROR!)";
467
pngtest_error_parameters *test =
468
(pngtest_error_parameters*)png_get_error_ptr(png_ptr);
472
if (test != NULL && test->file_name != NULL)
473
name = test->file_name;
475
fprintf(STDERR, "%s: libpng warning: %s\n", name, message);
478
/* This is the default error handling function. Note that replacements for
479
* this function MUST NOT RETURN, or the program will likely crash. This
480
* function is used by default, or if the program supplies NULL for the
481
* error function pointer in png_set_error_fn().
484
pngtest_error(png_structp png_ptr, png_const_charp message)
488
pngtest_warning(png_ptr, message);
489
/* We can return because png_error calls the default handler, which is
490
* actually OK in this case.
494
/* END of code to validate stdio-free compilation */
496
/* START of code to validate memory allocation and deallocation */
497
#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
499
/* Allocate memory. For reasonable files, size should never exceed
500
* 64K. However, zlib may allocate more than 64K if you don't tell
501
* it not to. See zconf.h and png.h for more information. zlib does
502
* need to allocate exactly 64K, so whatever you call here must
503
* have the ability to do that.
505
* This piece of code can be compiled to validate max 64K allocations
506
* by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K.
508
typedef struct memory_information
510
png_alloc_size_t size;
512
struct memory_information *next;
513
} memory_information;
514
typedef memory_information *memory_infop;
516
static memory_infop pinformation = NULL;
517
static int current_allocation = 0;
518
static int maximum_allocation = 0;
519
static int total_allocation = 0;
520
static int num_allocations = 0;
522
png_voidp PNGCBAPI png_debug_malloc PNGARG((png_structp png_ptr,
523
png_alloc_size_t size));
524
void PNGCBAPI png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr));
527
PNGCBAPI png_debug_malloc(png_structp png_ptr, png_alloc_size_t size)
530
/* png_malloc has already tested for NULL; png_create_struct calls
531
* png_debug_malloc directly, with png_ptr == NULL which is OK
537
/* This calls the library allocator twice, once to get the requested
538
buffer and once to get a new free list entry. */
540
/* Disable malloc_fn and free_fn */
542
png_set_mem_fn(png_ptr, NULL, NULL, NULL);
543
pinfo = (memory_infop)png_malloc(png_ptr,
546
current_allocation += size;
547
total_allocation += size;
550
if (current_allocation > maximum_allocation)
551
maximum_allocation = current_allocation;
553
pinfo->pointer = png_malloc(png_ptr, size);
554
/* Restore malloc_fn and free_fn */
556
png_set_mem_fn(png_ptr,
557
NULL, png_debug_malloc, png_debug_free);
559
if (size != 0 && pinfo->pointer == NULL)
561
current_allocation -= size;
562
total_allocation -= size;
564
"out of memory in pngtest->png_debug_malloc");
567
pinfo->next = pinformation;
568
pinformation = pinfo;
569
/* Make sure the caller isn't assuming zeroed memory. */
570
memset(pinfo->pointer, 0xdd, pinfo->size);
573
printf("png_malloc %lu bytes at %p\n", (unsigned long)size,
576
return (png_voidp)(pinfo->pointer);
580
/* Free a pointer. It is removed from the list at the same time. */
582
png_debug_free(png_structp png_ptr, png_voidp ptr)
585
fprintf(STDERR, "NULL pointer to png_debug_free.\n");
589
#if 0 /* This happens all the time. */
590
fprintf(STDERR, "WARNING: freeing NULL pointer\n");
595
/* Unlink the element from the list. */
596
if (pinformation != NULL)
598
memory_infop *ppinfo = &pinformation;
602
memory_infop pinfo = *ppinfo;
604
if (pinfo->pointer == ptr)
606
*ppinfo = pinfo->next;
607
current_allocation -= pinfo->size;
608
if (current_allocation < 0)
609
fprintf(STDERR, "Duplicate free of memory\n");
610
/* We must free the list element too, but first kill
611
the memory that is to be freed. */
612
memset(ptr, 0x55, pinfo->size);
618
if (pinfo->next == NULL)
620
fprintf(STDERR, "Pointer %p not found\n", ptr);
624
ppinfo = &pinfo->next;
628
/* Finally free the data. */
630
printf("Freeing %p\n", ptr);
636
#endif /* USER_MEM && DEBUG */
637
/* END of code to test memory allocation/deallocation */
640
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
641
/* Demonstration of user chunk support of the sTER and vpAg chunks */
643
/* (sTER is a public chunk not yet known by libpng. vpAg is a private
644
chunk used in ImageMagick to store "virtual page" size). */
646
static struct user_chunk_data
648
png_const_infop info_ptr;
649
png_uint_32 vpAg_width, vpAg_height;
656
/* Used for location and order; zero means nothing. */
657
#define have_sTER 0x01
658
#define have_vpAg 0x02
659
#define before_PLTE 0x10
660
#define before_IDAT 0x20
661
#define after_IDAT 0x40
664
init_callback_info(png_const_infop info_ptr)
666
MEMZERO(user_chunk_data);
667
user_chunk_data.info_ptr = info_ptr;
671
set_location(png_structp png_ptr, struct user_chunk_data *data, int what)
675
if ((data->location[0] & what) != 0 || (data->location[1] & what) != 0)
676
return 0; /* already have one of these */
678
/* Find where we are (the code below zeroes info_ptr to indicate that the
679
* chunks before the first IDAT have been read.)
681
if (data->info_ptr == NULL) /* after IDAT */
682
location = what | after_IDAT;
684
else if (png_get_valid(png_ptr, data->info_ptr, PNG_INFO_PLTE) != 0)
685
location = what | before_IDAT;
688
location = what | before_PLTE;
690
if (data->location[0] == 0)
691
data->location[0] = location;
694
data->location[1] = location;
696
return 1; /* handled */
700
read_user_chunk_callback(png_struct *png_ptr, png_unknown_chunkp chunk)
702
struct user_chunk_data *my_user_chunk_data =
703
(struct user_chunk_data*)png_get_user_chunk_ptr(png_ptr);
705
if (my_user_chunk_data == NULL)
706
png_error(png_ptr, "lost user chunk pointer");
708
/* Return one of the following:
709
* return (-n); chunk had an error
710
* return (0); did not recognize
711
* return (n); success
713
* The unknown chunk structure contains the chunk data:
718
* Note that libpng has already taken care of the CRC handling.
721
if (chunk->name[0] == 115 && chunk->name[1] == 84 && /* s T */
722
chunk->name[2] == 69 && chunk->name[3] == 82) /* E R */
724
/* Found sTER chunk */
725
if (chunk->size != 1)
726
return (-1); /* Error return */
728
if (chunk->data[0] != 0 && chunk->data[0] != 1)
729
return (-1); /* Invalid mode */
731
if (set_location(png_ptr, my_user_chunk_data, have_sTER) != 0)
733
my_user_chunk_data->sTER_mode=chunk->data[0];
738
return (0); /* duplicate sTER - give it to libpng */
741
if (chunk->name[0] != 118 || chunk->name[1] != 112 || /* v p */
742
chunk->name[2] != 65 || chunk->name[3] != 103) /* A g */
743
return (0); /* Did not recognize */
745
/* Found ImageMagick vpAg chunk */
747
if (chunk->size != 9)
748
return (-1); /* Error return */
750
if (set_location(png_ptr, my_user_chunk_data, have_vpAg) == 0)
751
return (0); /* duplicate vpAg */
753
my_user_chunk_data->vpAg_width = png_get_uint_31(png_ptr, chunk->data);
754
my_user_chunk_data->vpAg_height = png_get_uint_31(png_ptr, chunk->data + 4);
755
my_user_chunk_data->vpAg_units = chunk->data[8];
760
#ifdef PNG_WRITE_SUPPORTED
762
write_sTER_chunk(png_structp write_ptr)
764
png_byte sTER[5] = {115, 84, 69, 82, '\0'};
767
fprintf(STDERR, "\n stereo mode = %d\n", user_chunk_data.sTER_mode);
769
png_write_chunk(write_ptr, sTER, &user_chunk_data.sTER_mode, 1);
773
write_vpAg_chunk(png_structp write_ptr)
775
png_byte vpAg[5] = {118, 112, 65, 103, '\0'};
777
png_byte vpag_chunk_data[9];
780
fprintf(STDERR, " vpAg = %lu x %lu, units = %d\n",
781
(unsigned long)user_chunk_data.vpAg_width,
782
(unsigned long)user_chunk_data.vpAg_height,
783
user_chunk_data.vpAg_units);
785
png_save_uint_32(vpag_chunk_data, user_chunk_data.vpAg_width);
786
png_save_uint_32(vpag_chunk_data + 4, user_chunk_data.vpAg_height);
787
vpag_chunk_data[8] = user_chunk_data.vpAg_units;
788
png_write_chunk(write_ptr, vpAg, vpag_chunk_data, 9);
792
write_chunks(png_structp write_ptr, int location)
796
/* Notice that this preserves the original chunk order, however chunks
797
* intercepted by the callback will be written *after* chunks passed to
798
* libpng. This will actually reverse a pair of sTER chunks or a pair of
799
* vpAg chunks, resulting in an error later. This is not worth worrying
800
* about - the chunks should not be duplicated!
804
if (user_chunk_data.location[i] == (location | have_sTER))
805
write_sTER_chunk(write_ptr);
807
else if (user_chunk_data.location[i] == (location | have_vpAg))
808
write_vpAg_chunk(write_ptr);
812
#else /* !READ_USER_CHUNKS */
813
# define write_chunks(pp,loc) ((void)0)
815
/* END of code to demonstrate user chunk support */
817
/* START of code to check that libpng has the required text support; this only
818
* checks for the write support because if read support is missing the chunk
819
* will simply not be reported back to pngtest.
821
#ifdef PNG_TEXT_SUPPORTED
823
pngtest_check_text_support(png_structp png_ptr, png_textp text_ptr,
828
switch (text_ptr[--num_text].compression)
830
case PNG_TEXT_COMPRESSION_NONE:
833
case PNG_TEXT_COMPRESSION_zTXt:
834
# ifndef PNG_WRITE_zTXt_SUPPORTED
835
++unsupported_chunks;
836
/* In libpng 1.7 this now does an app-error, so stop it: */
837
text_ptr[num_text].compression = PNG_TEXT_COMPRESSION_NONE;
841
case PNG_ITXT_COMPRESSION_NONE:
842
case PNG_ITXT_COMPRESSION_zTXt:
843
# ifndef PNG_WRITE_iTXt_SUPPORTED
844
++unsupported_chunks;
845
text_ptr[num_text].compression = PNG_TEXT_COMPRESSION_NONE;
850
/* This is an error */
851
png_error(png_ptr, "invalid text chunk compression field");
857
/* END of code to check that libpng has the required text support */
861
test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
863
static png_FILE_p fpin;
864
static png_FILE_p fpout; /* "static" prevents setjmp corruption */
865
pngtest_error_parameters error_parameters;
866
png_structp read_ptr;
867
png_infop read_info_ptr, end_info_ptr;
868
#ifdef PNG_WRITE_SUPPORTED
869
png_structp write_ptr;
870
png_infop write_info_ptr;
871
png_infop write_end_info_ptr;
872
#ifdef PNG_WRITE_FILTER_SUPPORTED
873
int interlace_preserved = 1;
874
#endif /* WRITE_FILTER */
876
png_structp write_ptr = NULL;
877
png_infop write_info_ptr = NULL;
878
png_infop write_end_info_ptr = NULL;
882
png_uint_32 width, height;
883
volatile int num_passes;
885
int bit_depth, color_type;
888
error_parameters.file_name = inname;
890
if ((fpin = fopen(inname, "rb")) == NULL)
892
fprintf(STDERR, "Could not find input file %s\n", inname);
896
if ((fpout = fopen(outname, "wb")) == NULL)
898
fprintf(STDERR, "Could not open output file %s\n", outname);
903
pngtest_debug("Allocating read and write structures");
904
#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
906
png_create_read_struct_2(PNG_LIBPNG_VER_STRING, NULL,
907
NULL, NULL, NULL, png_debug_malloc, png_debug_free);
910
png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
912
png_set_error_fn(read_ptr, &error_parameters, pngtest_error,
915
#ifdef PNG_WRITE_SUPPORTED
916
#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
918
png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL,
919
NULL, NULL, NULL, png_debug_malloc, png_debug_free);
922
png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
924
png_set_error_fn(write_ptr, &error_parameters, pngtest_error,
927
pngtest_debug("Allocating read_info, write_info and end_info structures");
928
read_info_ptr = png_create_info_struct(read_ptr);
929
end_info_ptr = png_create_info_struct(read_ptr);
930
#ifdef PNG_WRITE_SUPPORTED
931
write_info_ptr = png_create_info_struct(write_ptr);
932
write_end_info_ptr = png_create_info_struct(write_ptr);
935
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
936
init_callback_info(read_info_ptr);
937
png_set_read_user_chunk_fn(read_ptr, &user_chunk_data,
938
read_user_chunk_callback);
941
#ifdef PNG_SETJMP_SUPPORTED
942
pngtest_debug("Setting jmpbuf for read struct");
943
if (setjmp(png_jmpbuf(read_ptr)))
945
fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
946
png_free(read_ptr, row_buf);
948
png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
949
#ifdef PNG_WRITE_SUPPORTED
950
png_destroy_info_struct(write_ptr, &write_end_info_ptr);
951
png_destroy_write_struct(&write_ptr, &write_info_ptr);
958
#ifdef PNG_WRITE_SUPPORTED
959
pngtest_debug("Setting jmpbuf for write struct");
961
if (setjmp(png_jmpbuf(write_ptr)))
963
fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
964
png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
965
png_destroy_info_struct(write_ptr, &write_end_info_ptr);
966
#ifdef PNG_WRITE_SUPPORTED
967
png_destroy_write_struct(&write_ptr, &write_info_ptr);
978
/* Treat png_benign_error() as errors on read */
979
png_set_benign_errors(read_ptr, 0);
981
#ifdef PNG_WRITE_SUPPORTED
982
/* Treat them as errors on write */
983
png_set_benign_errors(write_ptr, 0);
986
/* if strict is not set, then app warnings and errors are treated as
987
* warnings in release builds, but not in unstable builds; this can be
988
* changed with '--relaxed'.
992
else if (relaxed != 0)
994
/* Allow application (pngtest) errors and warnings to pass */
995
png_set_benign_errors(read_ptr, 1);
997
#ifdef PNG_WRITE_SUPPORTED
998
png_set_benign_errors(write_ptr, 1);
1002
pngtest_debug("Initializing input and output streams");
1003
#ifdef PNG_STDIO_SUPPORTED
1004
png_init_io(read_ptr, fpin);
1005
# ifdef PNG_WRITE_SUPPORTED
1006
png_init_io(write_ptr, fpout);
1009
png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data);
1010
# ifdef PNG_WRITE_SUPPORTED
1011
png_set_write_fn(write_ptr, (png_voidp)fpout, pngtest_write_data,
1012
# ifdef PNG_WRITE_FLUSH_SUPPORTED
1020
if (status_dots_requested == 1)
1022
#ifdef PNG_WRITE_SUPPORTED
1023
png_set_write_status_fn(write_ptr, write_row_callback);
1025
png_set_read_status_fn(read_ptr, read_row_callback);
1030
#ifdef PNG_WRITE_SUPPORTED
1031
png_set_write_status_fn(write_ptr, NULL);
1033
png_set_read_status_fn(read_ptr, NULL);
1036
#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1037
png_set_read_user_transform_fn(read_ptr, read_user_callback);
1039
#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1041
png_set_write_user_transform_fn(write_ptr, count_zero_samples);
1044
#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
1045
/* Preserve all the unknown chunks, if possible. If this is disabled then,
1046
* even if the png_{get,set}_unknown_chunks stuff is enabled, we can't use
1047
* libpng to *save* the unknown chunks on read (because we can't switch the
1050
* Notice that if SET_UNKNOWN_CHUNKS is *not* supported read will discard all
1051
* unknown chunks and write will write them all.
1053
#ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
1054
png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS,
1057
#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1058
png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS,
1063
pngtest_debug("Reading info struct");
1064
png_read_info(read_ptr, read_info_ptr);
1066
#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1067
/* This is a bit of a hack; there is no obvious way in the callback function
1068
* to determine that the chunks before the first IDAT have been read, so
1069
* remove the info_ptr (which is only used to determine position relative to
1070
* PLTE) here to indicate that we are after the IDAT.
1072
user_chunk_data.info_ptr = NULL;
1075
pngtest_debug("Transferring info struct");
1077
int interlace_type, compression_type, filter_type;
1079
if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth,
1080
&color_type, &interlace_type, &compression_type, &filter_type) != 0)
1082
png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth,
1083
color_type, interlace_type, compression_type, filter_type);
1084
/* num_passes may not be available below if interlace support is not
1085
* provided by libpng for both read and write.
1087
switch (interlace_type)
1089
case PNG_INTERLACE_NONE:
1093
case PNG_INTERLACE_ADAM7:
1098
png_error(read_ptr, "invalid interlace type");
1104
png_error(read_ptr, "png_get_IHDR failed");
1106
#ifdef PNG_FIXED_POINT_SUPPORTED
1107
#ifdef PNG_cHRM_SUPPORTED
1109
png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
1112
if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y,
1113
&red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y) != 0)
1115
png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x,
1116
red_y, green_x, green_y, blue_x, blue_y);
1120
#ifdef PNG_gAMA_SUPPORTED
1122
png_fixed_point gamma;
1124
if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma) != 0)
1125
png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma);
1128
#else /* Use floating point versions */
1129
#ifdef PNG_FLOATING_POINT_SUPPORTED
1130
#ifdef PNG_cHRM_SUPPORTED
1132
double white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
1135
if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
1136
&red_y, &green_x, &green_y, &blue_x, &blue_y) != 0)
1138
png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x,
1139
red_y, green_x, green_y, blue_x, blue_y);
1143
#ifdef PNG_gAMA_SUPPORTED
1147
if (png_get_gAMA(read_ptr, read_info_ptr, &gamma) != 0)
1148
png_set_gAMA(write_ptr, write_info_ptr, gamma);
1151
#endif /* Floating point */
1152
#endif /* Fixed point */
1153
#ifdef PNG_iCCP_SUPPORTED
1157
png_uint_32 proflen;
1158
int compression_type;
1160
if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type,
1161
&profile, &proflen) != 0)
1163
png_set_iCCP(write_ptr, write_info_ptr, name, compression_type,
1168
#ifdef PNG_sRGB_SUPPORTED
1172
if (png_get_sRGB(read_ptr, read_info_ptr, &intent) != 0)
1173
png_set_sRGB(write_ptr, write_info_ptr, intent);
1180
if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette) != 0)
1181
png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
1183
#ifdef PNG_bKGD_SUPPORTED
1185
png_color_16p background;
1187
if (png_get_bKGD(read_ptr, read_info_ptr, &background) != 0)
1189
png_set_bKGD(write_ptr, write_info_ptr, background);
1193
#ifdef PNG_hIST_SUPPORTED
1197
if (png_get_hIST(read_ptr, read_info_ptr, &hist) != 0)
1198
png_set_hIST(write_ptr, write_info_ptr, hist);
1201
#ifdef PNG_oFFs_SUPPORTED
1203
png_int_32 offset_x, offset_y;
1206
if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y,
1209
png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
1213
#ifdef PNG_pCAL_SUPPORTED
1215
png_charp purpose, units;
1220
if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type,
1221
&nparams, &units, ¶ms) != 0)
1223
png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type,
1224
nparams, units, params);
1228
#ifdef PNG_pHYs_SUPPORTED
1230
png_uint_32 res_x, res_y;
1233
if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y,
1235
png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type);
1238
#ifdef PNG_sBIT_SUPPORTED
1240
png_color_8p sig_bit;
1242
if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit) != 0)
1243
png_set_sBIT(write_ptr, write_info_ptr, sig_bit);
1246
#ifdef PNG_sCAL_SUPPORTED
1247
#if defined(PNG_FLOATING_POINT_SUPPORTED) && \
1248
defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
1251
double scal_width, scal_height;
1253
if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width,
1256
png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height);
1260
#ifdef PNG_FIXED_POINT_SUPPORTED
1263
png_charp scal_width, scal_height;
1265
if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width,
1268
png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width,
1276
#ifdef PNG_sPLT_SUPPORTED
1278
png_sPLT_tp entries;
1280
int num_entries = (int) png_get_sPLT(read_ptr, read_info_ptr, &entries);
1283
png_set_sPLT(write_ptr, write_info_ptr, entries, num_entries);
1288
#ifdef PNG_TEXT_SUPPORTED
1293
if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
1295
pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1297
pngtest_check_text_support(read_ptr, text_ptr, num_text);
1304
for (i=0; i<num_text; i++)
1306
printf(" Text compression[%d]=%d\n",
1307
i, text_ptr[i].compression);
1311
png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
1315
#ifdef PNG_tIME_SUPPORTED
1319
if (png_get_tIME(read_ptr, read_info_ptr, &mod_time) != 0)
1321
png_set_tIME(write_ptr, write_info_ptr, mod_time);
1322
#ifdef PNG_TIME_RFC1123_SUPPORTED
1323
if (png_convert_to_rfc1123_buffer(tIME_string, mod_time) != 0)
1324
tIME_string[(sizeof tIME_string) - 1] = '\0';
1328
strncpy(tIME_string, "*** invalid time ***", (sizeof tIME_string));
1329
tIME_string[(sizeof tIME_string) - 1] = '\0';
1332
tIME_chunk_present++;
1333
#endif /* TIME_RFC1123 */
1337
#ifdef PNG_tRNS_SUPPORTED
1339
png_bytep trans_alpha;
1341
png_color_16p trans_color;
1343
if (png_get_tRNS(read_ptr, read_info_ptr, &trans_alpha, &num_trans,
1346
int sample_max = (1 << bit_depth);
1347
/* libpng doesn't reject a tRNS chunk with out-of-range samples */
1348
if (!((color_type == PNG_COLOR_TYPE_GRAY &&
1349
(int)trans_color->gray > sample_max) ||
1350
(color_type == PNG_COLOR_TYPE_RGB &&
1351
((int)trans_color->red > sample_max ||
1352
(int)trans_color->green > sample_max ||
1353
(int)trans_color->blue > sample_max))))
1354
png_set_tRNS(write_ptr, write_info_ptr, trans_alpha, num_trans,
1359
#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1361
png_unknown_chunkp unknowns;
1362
int num_unknowns = png_get_unknown_chunks(read_ptr, read_info_ptr,
1365
if (num_unknowns != 0)
1367
png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns,
1369
#if PNG_LIBPNG_VER < 10600
1370
/* Copy the locations from the read_info_ptr. The automatically
1371
* generated locations in write_end_info_ptr are wrong prior to 1.6.0
1372
* because they are reset from the write pointer (removed in 1.6.0).
1376
for (i = 0; i < num_unknowns; i++)
1377
png_set_unknown_chunk_location(write_ptr, write_info_ptr, i,
1378
unknowns[i].location);
1385
#ifdef PNG_WRITE_SUPPORTED
1386
pngtest_debug("Writing info struct");
1388
/* Write the info in two steps so that if we write the 'unknown' chunks here
1389
* they go to the correct place.
1391
png_write_info_before_PLTE(write_ptr, write_info_ptr);
1393
write_chunks(write_ptr, before_PLTE); /* before PLTE */
1395
png_write_info(write_ptr, write_info_ptr);
1397
write_chunks(write_ptr, before_IDAT); /* after PLTE */
1400
#ifdef SINGLE_ROWBUF_ALLOC
1401
pngtest_debug("Allocating row buffer...");
1402
row_buf = (png_bytep)png_malloc(read_ptr,
1403
png_get_rowbytes(read_ptr, read_info_ptr));
1405
pngtest_debug1("\t0x%08lx", (unsigned long)row_buf);
1406
#endif /* SINGLE_ROWBUF_ALLOC */
1407
pngtest_debug("Writing row data");
1409
#if defined(PNG_READ_INTERLACING_SUPPORTED) &&\
1410
defined(PNG_WRITE_INTERLACING_SUPPORTED)
1411
/* Both must be defined for libpng to be able to handle the interlace,
1412
* otherwise it gets handled below by simply reading and writing the passes
1415
if (png_set_interlace_handling(read_ptr) != num_passes)
1416
png_error(write_ptr,
1417
"png_set_interlace_handling(read): wrong pass count ");
1418
if (png_set_interlace_handling(write_ptr) != num_passes)
1419
png_error(write_ptr,
1420
"png_set_interlace_handling(write): wrong pass count ");
1421
#else /* png_set_interlace_handling not called on either read or write */
1422
# define calc_pass_height
1423
#endif /* not using libpng interlace handling */
1425
#ifdef PNGTEST_TIMING
1426
t_stop = (float)clock();
1427
t_misc += (t_stop - t_start);
1430
for (pass = 0; pass < num_passes; pass++)
1432
# ifdef calc_pass_height
1433
png_uint_32 pass_height;
1435
if (num_passes == 7) /* interlaced */
1437
if (PNG_PASS_COLS(width, pass) > 0)
1438
pass_height = PNG_PASS_ROWS(height, pass);
1444
else /* not interlaced */
1445
pass_height = height;
1447
# define pass_height height
1450
pngtest_debug1("Writing row data for pass %d", pass);
1451
for (y = 0; y < pass_height; y++)
1453
#ifndef SINGLE_ROWBUF_ALLOC
1454
pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y);
1456
row_buf = (png_bytep)png_malloc(read_ptr,
1457
png_get_rowbytes(read_ptr, read_info_ptr));
1459
pngtest_debug2("\t0x%08lx (%lu bytes)", (unsigned long)row_buf,
1460
(unsigned long)png_get_rowbytes(read_ptr, read_info_ptr));
1462
#endif /* !SINGLE_ROWBUF_ALLOC */
1463
png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1);
1465
#ifdef PNG_WRITE_SUPPORTED
1466
#ifdef PNGTEST_TIMING
1467
t_stop = (float)clock();
1468
t_decode += (t_stop - t_start);
1471
png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
1472
#ifdef PNGTEST_TIMING
1473
t_stop = (float)clock();
1474
t_encode += (t_stop - t_start);
1479
#ifndef SINGLE_ROWBUF_ALLOC
1480
pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y);
1481
png_free(read_ptr, row_buf);
1483
#endif /* !SINGLE_ROWBUF_ALLOC */
1487
#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
1488
# ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1489
png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1);
1491
# ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1492
png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
1496
pngtest_debug("Reading and writing end_info data");
1498
png_read_end(read_ptr, end_info_ptr);
1499
#ifdef PNG_TEXT_SUPPORTED
1504
if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
1506
pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1508
pngtest_check_text_support(read_ptr, text_ptr, num_text);
1515
for (i=0; i<num_text; i++)
1517
printf(" Text compression[%d]=%d\n",
1518
i, text_ptr[i].compression);
1522
png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
1526
#ifdef PNG_tIME_SUPPORTED
1530
if (png_get_tIME(read_ptr, end_info_ptr, &mod_time) != 0)
1532
png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
1533
#ifdef PNG_TIME_RFC1123_SUPPORTED
1534
if (png_convert_to_rfc1123_buffer(tIME_string, mod_time) != 0)
1535
tIME_string[(sizeof tIME_string) - 1] = '\0';
1539
strncpy(tIME_string, "*** invalid time ***", sizeof tIME_string);
1540
tIME_string[(sizeof tIME_string)-1] = '\0';
1543
tIME_chunk_present++;
1544
#endif /* TIME_RFC1123 */
1548
#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1550
png_unknown_chunkp unknowns;
1551
int num_unknowns = png_get_unknown_chunks(read_ptr, end_info_ptr,
1554
if (num_unknowns != 0)
1556
png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns,
1558
#if PNG_LIBPNG_VER < 10600
1559
/* Copy the locations from the read_info_ptr. The automatically
1560
* generated locations in write_end_info_ptr are wrong prior to 1.6.0
1561
* because they are reset from the write pointer (removed in 1.6.0).
1565
for (i = 0; i < num_unknowns; i++)
1566
png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i,
1567
unknowns[i].location);
1574
#ifdef PNG_WRITE_SUPPORTED
1575
#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
1576
/* Normally one would use Z_DEFAULT_STRATEGY for text compression.
1577
* This is here just to make pngtest replicate the results from libpng
1578
* versions prior to 1.5.4, and to test this new API.
1580
png_set_text_compression_strategy(write_ptr, Z_FILTERED);
1583
/* When the unknown vpAg/sTER chunks are written by pngtest the only way to
1584
* do it is to write them *before* calling png_write_end. When unknown
1585
* chunks are written by libpng, however, they are written just before IEND.
1586
* There seems to be no way round this, however vpAg/sTER are not expected
1589
write_chunks(write_ptr, after_IDAT);
1591
png_write_end(write_ptr, write_end_info_ptr);
1594
#ifdef PNG_EASY_ACCESS_SUPPORTED
1597
png_uint_32 iwidth, iheight;
1598
iwidth = png_get_image_width(write_ptr, write_info_ptr);
1599
iheight = png_get_image_height(write_ptr, write_info_ptr);
1600
fprintf(STDERR, "\n Image width = %lu, height = %lu\n",
1601
(unsigned long)iwidth, (unsigned long)iheight);
1605
pngtest_debug("Destroying data structs");
1606
#ifdef SINGLE_ROWBUF_ALLOC
1607
pngtest_debug("destroying row_buf for read_ptr");
1608
png_free(read_ptr, row_buf);
1610
#endif /* SINGLE_ROWBUF_ALLOC */
1611
pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr");
1612
png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
1613
#ifdef PNG_WRITE_SUPPORTED
1614
pngtest_debug("destroying write_end_info_ptr");
1615
png_destroy_info_struct(write_ptr, &write_end_info_ptr);
1616
pngtest_debug("destroying write_ptr, write_info_ptr");
1617
png_destroy_write_struct(&write_ptr, &write_info_ptr);
1619
pngtest_debug("Destruction complete.");
1624
/* Summarize any warnings or errors and in 'strict' mode fail the test.
1625
* Unsupported chunks can result in warnings, in that case ignore the strict
1626
* setting, otherwise fail the test on warnings as well as errors.
1628
if (error_count > 0)
1630
/* We don't really expect to get here because of the setjmp handling
1631
* above, but this is safe.
1633
fprintf(STDERR, "\n %s: %d libpng errors found (%d warnings)",
1634
inname, error_count, warning_count);
1640
# ifdef PNG_WRITE_SUPPORTED
1641
/* If there is no write support nothing was written! */
1642
else if (unsupported_chunks > 0)
1644
fprintf(STDERR, "\n %s: unsupported chunks (%d)%s",
1645
inname, unsupported_chunks, strict ? ": IGNORED --strict!" : "");
1649
else if (warning_count > 0)
1651
fprintf(STDERR, "\n %s: %d libpng warnings found",
1652
inname, warning_count);
1658
pngtest_debug("Opening files for comparison");
1659
if ((fpin = fopen(inname, "rb")) == NULL)
1661
fprintf(STDERR, "Could not find file %s\n", inname);
1665
if ((fpout = fopen(outname, "rb")) == NULL)
1667
fprintf(STDERR, "Could not find file %s\n", outname);
1672
#if defined (PNG_WRITE_SUPPORTED) /* else nothing was written */ &&\
1673
defined (PNG_WRITE_FILTER_SUPPORTED)
1674
if (interlace_preserved != 0) /* else the files will be changed */
1678
static int wrote_question = 0;
1679
png_size_t num_in, num_out;
1680
char inbuf[256], outbuf[256];
1682
num_in = fread(inbuf, 1, sizeof inbuf, fpin);
1683
num_out = fread(outbuf, 1, sizeof outbuf, fpout);
1685
if (num_in != num_out)
1687
fprintf(STDERR, "\nFiles %s and %s are of a different size\n",
1690
if (wrote_question == 0 && unsupported_chunks == 0)
1693
" Was %s written with the same maximum IDAT chunk size (%d bytes),",
1694
inname, PNG_ZBUF_SIZE);
1696
"\n filtering heuristic (libpng default), compression");
1698
" level (zlib default),\n and zlib version (%s)?\n\n",
1706
if (strict != 0 && unsupported_chunks == 0)
1716
if (memcmp(inbuf, outbuf, num_in))
1718
fprintf(STDERR, "\nFiles %s and %s are different\n", inname,
1721
if (wrote_question == 0 && unsupported_chunks == 0)
1724
" Was %s written with the same maximum IDAT chunk size (%d bytes),",
1725
inname, PNG_ZBUF_SIZE);
1727
"\n filtering heuristic (libpng default), compression");
1729
" level (zlib default),\n and zlib version (%s)?\n\n",
1737
/* NOTE: the unsupported_chunks escape is permitted here because
1738
* unsupported text chunk compression will result in the compression
1739
* mode being changed (to NONE) yet, in the test case, the result
1740
* can be exactly the same size!
1742
if (strict != 0 && unsupported_chunks == 0)
1750
#endif /* WRITE && WRITE_FILTER */
1758
/* Input and output filenames */
1760
static PNG_CONST char *inname = "pngtest/png";
1761
static PNG_CONST char *outname = "pngout/png";
1763
static PNG_CONST char *inname = "pngtest.png";
1764
static PNG_CONST char *outname = "pngout.png";
1768
main(int argc, char *argv[])
1773
png_structp dummy_ptr;
1775
fprintf(STDERR, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
1776
fprintf(STDERR, " with zlib version %s\n", ZLIB_VERSION);
1777
fprintf(STDERR, "%s", png_get_copyright(NULL));
1778
/* Show the version of libpng used in building the library */
1779
fprintf(STDERR, " library (%lu):%s",
1780
(unsigned long)png_access_version_number(),
1781
png_get_header_version(NULL));
1783
/* Show the version of libpng used in building the application */
1784
fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
1785
PNG_HEADER_VERSION_STRING);
1787
/* Do some consistency checking on the memory allocation settings, I'm
1788
* not sure this matters, but it is nice to know, the first of these
1789
* tests should be impossible because of the way the macros are set
1792
#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1793
fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n");
1795
/* I think the following can happen. */
1796
#if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1797
fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n");
1800
if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING))
1803
"Warning: versions are different between png.h and png.c\n");
1804
fprintf(STDERR, " png.h version: %s\n", PNG_LIBPNG_VER_STRING);
1805
fprintf(STDERR, " png.c version: %s\n\n", png_libpng_ver);
1811
if (strcmp(argv[1], "-m") == 0)
1814
status_dots_requested = 0;
1817
else if (strcmp(argv[1], "-mv") == 0 ||
1818
strcmp(argv[1], "-vm") == 0 )
1822
status_dots_requested = 1;
1825
else if (strcmp(argv[1], "-v") == 0)
1828
status_dots_requested = 1;
1832
else if (strcmp(argv[1], "--strict") == 0)
1834
status_dots_requested = 0;
1841
else if (strcmp(argv[1], "--relaxed") == 0)
1843
status_dots_requested = 0;
1853
status_dots_requested = 0;
1857
if (multiple == 0 && argc == 3 + verbose)
1858
outname = argv[2 + verbose];
1860
if ((multiple == 0 && argc > 3 + verbose) ||
1861
(multiple != 0 && argc < 2))
1864
"usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
1867
" reads/writes one PNG file (without -m) or multiple files (-m)\n");
1869
" with -m %s is used as a temporary file\n", outname);
1876
#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1877
int allocation_now = current_allocation;
1879
for (i=2; i<argc; ++i)
1882
fprintf(STDERR, "\n Testing %s:", argv[i]);
1884
fprintf(STDERR, "\n");
1886
kerror = test_one_file(argv[i], outname);
1889
#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1890
fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1891
(unsigned long)zero_samples);
1893
fprintf(STDERR, " PASS\n");
1895
#ifdef PNG_TIME_RFC1123_SUPPORTED
1896
if (tIME_chunk_present != 0)
1897
fprintf(STDERR, " tIME = %s\n", tIME_string);
1899
tIME_chunk_present = 0;
1900
#endif /* TIME_RFC1123 */
1905
fprintf(STDERR, " FAIL\n");
1908
#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1909
if (allocation_now != current_allocation)
1910
fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1911
current_allocation - allocation_now);
1913
if (current_allocation != 0)
1915
memory_infop pinfo = pinformation;
1917
fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1918
current_allocation);
1920
while (pinfo != NULL)
1922
fprintf(STDERR, " %lu bytes at %p\n",
1923
(unsigned long)pinfo->size,
1925
pinfo = pinfo->next;
1930
#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1931
fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1932
current_allocation);
1933
fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1934
maximum_allocation);
1935
fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1937
fprintf(STDERR, " Number of allocations: %10d\n",
1945
for (i = 0; i<3; ++i)
1948
#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1949
int allocation_now = current_allocation;
1952
status_dots_requested = 1;
1954
else if (verbose == 0)
1955
status_dots_requested = 0;
1957
if (i == 0 || verbose == 1 || ierror != 0)
1959
fprintf(STDERR, "\n Testing %s:", inname);
1961
fprintf(STDERR, "\n");
1965
kerror = test_one_file(inname, outname);
1969
if (verbose == 1 || i == 2)
1971
#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1972
fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1973
(unsigned long)zero_samples);
1975
fprintf(STDERR, " PASS\n");
1977
#ifdef PNG_TIME_RFC1123_SUPPORTED
1978
if (tIME_chunk_present != 0)
1979
fprintf(STDERR, " tIME = %s\n", tIME_string);
1980
#endif /* TIME_RFC1123 */
1986
if (verbose == 0 && i != 2)
1988
fprintf(STDERR, "\n Testing %s:", inname);
1990
fprintf(STDERR, "\n");
1994
fprintf(STDERR, " FAIL\n");
1997
#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1998
if (allocation_now != current_allocation)
1999
fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
2000
current_allocation - allocation_now);
2002
if (current_allocation != 0)
2004
memory_infop pinfo = pinformation;
2006
fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
2007
current_allocation);
2009
while (pinfo != NULL)
2011
fprintf(STDERR, " %lu bytes at %p\n",
2012
(unsigned long)pinfo->size, pinfo->pointer);
2013
pinfo = pinfo->next;
2018
#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2019
fprintf(STDERR, " Current memory allocation: %10d bytes\n",
2020
current_allocation);
2021
fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
2022
maximum_allocation);
2023
fprintf(STDERR, " Total memory allocation: %10d bytes\n",
2025
fprintf(STDERR, " Number of allocations: %10d\n",
2030
#ifdef PNGTEST_TIMING
2031
t_stop = (float)clock();
2032
t_misc += (t_stop - t_start);
2034
fprintf(STDERR, " CPU time used = %.3f seconds",
2035
(t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC);
2036
fprintf(STDERR, " (decoding %.3f,\n",
2037
t_decode/(float)CLOCKS_PER_SEC);
2038
fprintf(STDERR, " encoding %.3f ,",
2039
t_encode/(float)CLOCKS_PER_SEC);
2040
fprintf(STDERR, " other %.3f seconds)\n\n",
2041
t_misc/(float)CLOCKS_PER_SEC);
2045
fprintf(STDERR, " libpng passes test\n");
2048
fprintf(STDERR, " libpng FAILS test\n");
2050
dummy_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
2051
fprintf(STDERR, " Default limits:\n");
2052
fprintf(STDERR, " width_max = %lu\n",
2053
(unsigned long) png_get_user_width_max(dummy_ptr));
2054
fprintf(STDERR, " height_max = %lu\n",
2055
(unsigned long) png_get_user_height_max(dummy_ptr));
2056
if (png_get_chunk_cache_max(dummy_ptr) == 0)
2057
fprintf(STDERR, " cache_max = unlimited\n");
2059
fprintf(STDERR, " cache_max = %lu\n",
2060
(unsigned long) png_get_chunk_cache_max(dummy_ptr));
2061
if (png_get_chunk_malloc_max(dummy_ptr) == 0)
2062
fprintf(STDERR, " malloc_max = unlimited\n");
2064
fprintf(STDERR, " malloc_max = %lu\n",
2065
(unsigned long) png_get_chunk_malloc_max(dummy_ptr));
2066
png_destroy_read_struct(&dummy_ptr, NULL, NULL);
2068
return (int)(ierror != 0);
2075
" test ignored because libpng was not built with read support\n");
2076
/* And skip this test */
2081
/* Generate a compiler error if there is an old png.h in the search path. */
2082
typedef png_libpng_version_1_6_22 Your_png_h_is_not_version_1_6_22;
added
removed
ext/native/ext/libpng/pngtest.c
