2 /* pngtest.c - a simple test program to test libpng
4 * Last changed in libpng 1.5.14 [January 24, 2013]
5 * Copyright (c) 1998-2013 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 #ifdef PNG_READ_SUPPORTED /* else nothing can be done */
48 /* Copied from pngpriv.h but only used in error messages below. */
50 # define PNG_ZBUF_SIZE 8192
52 #define FCLOSE(file) fclose(file)
54 #ifndef PNG_STDIO_SUPPORTED
55 typedef FILE * png_FILE_p
;
58 /* Makes pngtest verbose so we can find problems. */
64 # define pngtest_debug(m) ((void)fprintf(stderr, m "\n"))
65 # define pngtest_debug1(m,p1) ((void)fprintf(stderr, m "\n", p1))
66 # define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2))
68 # define pngtest_debug(m) ((void)0)
69 # define pngtest_debug1(m,p1) ((void)0)
70 # define pngtest_debug2(m,p1,p2) ((void)0)
74 # define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */
78 #define PNGTEST_TIMING
81 #ifndef PNG_FLOATING_POINT_SUPPORTED
86 static float t_start
, t_stop
, t_decode
, t_encode
, t_misc
;
90 #ifdef PNG_TIME_RFC1123_SUPPORTED
91 #define PNG_tIME_STRING_LENGTH 29
92 static int tIME_chunk_present
= 0;
93 static char tIME_string
[PNG_tIME_STRING_LENGTH
] = "tIME chunk is not present";
96 static int verbose
= 0;
97 static int strict
= 0;
98 static int relaxed
= 0;
99 static int unsupported_chunks
= 0; /* chunk unsupported by libpng in input */
100 static int error_count
= 0; /* count calls to png_error */
101 static int warning_count
= 0; /* count calls to png_warning */
107 /* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
109 # define png_jmpbuf(png_ptr) png_ptr->jmpbuf
112 /* Defines for unknown chunk handling if required. */
113 #ifndef PNG_HANDLE_CHUNK_ALWAYS
114 # define PNG_HANDLE_CHUNK_ALWAYS 3
116 #ifndef PNG_HANDLE_CHUNK_IF_SAFE
117 # define PNG_HANDLE_CHUNK_IF_SAFE 2
120 /* Utility to save typing/errors, the argument must be a name */
121 #define MEMZERO(var) ((void)memset(&var, 0, sizeof var))
123 /* Example of using row callbacks to make a simple progress meter */
124 static int status_pass
= 1;
125 static int status_dots_requested
= 0;
126 static int status_dots
= 1;
129 read_row_callback(png_structp png_ptr
, png_uint_32 row_number
, int pass
)
131 if (png_ptr
== NULL
|| row_number
> PNG_UINT_31_MAX
)
134 if (status_pass
!= pass
)
136 fprintf(stdout
, "\n Pass %d: ", pass
);
143 if (status_dots
== 0)
145 fprintf(stdout
, "\n ");
149 fprintf(stdout
, "r");
152 #ifdef PNG_WRITE_SUPPORTED
154 write_row_callback(png_structp png_ptr
, png_uint_32 row_number
, int pass
)
156 if (png_ptr
== NULL
|| row_number
> PNG_UINT_31_MAX
|| pass
> 7)
159 fprintf(stdout
, "w");
164 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
165 /* Example of using user transform callback (we don't transform anything,
166 * but merely examine the row filters. We set this to 256 rather than
167 * 5 in case illegal filter values are present.)
169 static png_uint_32 filters_used
[256];
171 count_filters(png_structp png_ptr
, png_row_infop row_info
, png_bytep data
)
173 if (png_ptr
!= NULL
&& row_info
!= NULL
)
174 ++filters_used
[*(data
- 1)];
178 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
179 /* Example of using user transform callback (we don't transform anything,
180 * but merely count the zero samples)
183 static png_uint_32 zero_samples
;
186 count_zero_samples(png_structp png_ptr
, png_row_infop row_info
, png_bytep data
)
192 /* Contents of row_info:
193 * png_uint_32 width width of row
194 * png_uint_32 rowbytes number of bytes in row
195 * png_byte color_type color type of pixels
196 * png_byte bit_depth bit depth of samples
197 * png_byte channels number of channels (1-4)
198 * png_byte pixel_depth bits per pixel (depth*channels)
201 /* Counts the number of zero samples (or zero pixels if color_type is 3 */
203 if (row_info
->color_type
== 0 || row_info
->color_type
== 3)
206 png_uint_32 n
, nstop
;
208 for (n
= 0, nstop
=row_info
->width
; n
<nstop
; n
++)
210 if (row_info
->bit_depth
== 1)
212 if (((*dp
<< pos
++ ) & 0x80) == 0)
222 if (row_info
->bit_depth
== 2)
224 if (((*dp
<< (pos
+=2)) & 0xc0) == 0)
234 if (row_info
->bit_depth
== 4)
236 if (((*dp
<< (pos
+=4)) & 0xf0) == 0)
246 if (row_info
->bit_depth
== 8)
250 if (row_info
->bit_depth
== 16)
252 if ((*dp
| *(dp
+1)) == 0)
258 else /* Other color types */
260 png_uint_32 n
, nstop
;
262 int color_channels
= row_info
->channels
;
263 if (row_info
->color_type
> 3)color_channels
--;
265 for (n
= 0, nstop
=row_info
->width
; n
<nstop
; n
++)
267 for (channel
= 0; channel
< color_channels
; channel
++)
269 if (row_info
->bit_depth
== 8)
273 if (row_info
->bit_depth
== 16)
275 if ((*dp
| *(dp
+1)) == 0)
281 if (row_info
->color_type
> 3)
284 if (row_info
->bit_depth
== 16)
290 #endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */
292 #ifndef PNG_STDIO_SUPPORTED
293 /* START of code to validate stdio-free compilation */
294 /* These copies of the default read/write functions come from pngrio.c and
295 * pngwio.c. They allow "don't include stdio" testing of the library.
296 * This is the function that does the actual reading of data. If you are
297 * not reading from a standard C stream, you should create a replacement
298 * read_data function and use it at run time with png_set_read_fn(), rather
299 * than changing the library.
302 #ifdef PNG_IO_STATE_SUPPORTED
304 pngtest_check_io_state(png_structp png_ptr
, png_size_t data_length
,
307 pngtest_check_io_state(png_structp png_ptr
, png_size_t data_length
,
310 png_uint_32 io_state
= png_get_io_state(png_ptr
);
313 /* Check if the current operation (reading / writing) is as expected. */
314 if ((io_state
& PNG_IO_MASK_OP
) != io_op
)
315 png_error(png_ptr
, "Incorrect operation in I/O state");
317 /* Check if the buffer size specific to the current location
318 * (file signature / header / data / crc) is as expected.
320 switch (io_state
& PNG_IO_MASK_LOC
)
322 case PNG_IO_SIGNATURE
:
326 case PNG_IO_CHUNK_HDR
:
327 if (data_length
!= 8)
330 case PNG_IO_CHUNK_DATA
:
331 break; /* no restrictions here */
332 case PNG_IO_CHUNK_CRC
:
333 if (data_length
!= 4)
337 err
= 1; /* uninitialized */
340 png_error(png_ptr
, "Bad I/O state or buffer size");
345 pngtest_read_data(png_structp png_ptr
, png_bytep data
, png_size_t length
)
347 png_size_t check
= 0;
350 /* fread() returns 0 on error, so it is OK to store this in a png_size_t
351 * instead of an int, which is what fread() actually returns.
353 io_ptr
= png_get_io_ptr(png_ptr
);
356 check
= fread(data
, 1, length
, (png_FILE_p
)io_ptr
);
361 png_error(png_ptr
, "Read Error");
364 #ifdef PNG_IO_STATE_SUPPORTED
365 pngtest_check_io_state(png_ptr
, length
, PNG_IO_READING
);
369 #ifdef PNG_WRITE_FLUSH_SUPPORTED
371 pngtest_flush(png_structp png_ptr
)
373 /* Do nothing; fflush() is said to be just a waste of energy. */
374 PNG_UNUSED(png_ptr
) /* Stifle compiler warning */
378 /* This is the function that does the actual writing of data. If you are
379 * not writing to a standard C stream, you should create a replacement
380 * write_data function and use it at run time with png_set_write_fn(), rather
381 * than changing the library.
384 pngtest_write_data(png_structp png_ptr
, png_bytep data
, png_size_t length
)
388 check
= fwrite(data
, 1, length
, (png_FILE_p
)png_get_io_ptr(png_ptr
));
392 png_error(png_ptr
, "Write Error");
395 #ifdef PNG_IO_STATE_SUPPORTED
396 pngtest_check_io_state(png_ptr
, length
, PNG_IO_WRITING
);
399 #endif /* !PNG_STDIO_SUPPORTED */
401 /* This function is called when there is a warning, but the library thinks
402 * it can continue anyway. Replacement functions don't have to do anything
403 * here if you don't want to. In the default configuration, png_ptr is
404 * not used, but it is passed in case it may be useful.
408 PNG_CONST
char *file_name
;
409 } pngtest_error_parameters
;
412 pngtest_warning(png_structp png_ptr
, png_const_charp message
)
414 PNG_CONST
char *name
= "UNKNOWN (ERROR!)";
415 pngtest_error_parameters
*test
=
416 (pngtest_error_parameters
*)png_get_error_ptr(png_ptr
);
420 if (test
!= NULL
&& test
->file_name
!= NULL
)
421 name
= test
->file_name
;
423 fprintf(STDERR
, "%s: libpng warning: %s\n", name
, message
);
426 /* This is the default error handling function. Note that replacements for
427 * this function MUST NOT RETURN, or the program will likely crash. This
428 * function is used by default, or if the program supplies NULL for the
429 * error function pointer in png_set_error_fn().
432 pngtest_error(png_structp png_ptr
, png_const_charp message
)
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.
442 /* END of code to validate stdio-free compilation */
444 /* START of code to validate memory allocation and deallocation */
445 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
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.
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.
456 typedef struct memory_information
458 png_alloc_size_t size
;
460 struct memory_information
*next
;
461 } memory_information
;
462 typedef memory_information
*memory_infop
;
464 static memory_infop pinformation
= NULL
;
465 static int current_allocation
= 0;
466 static int maximum_allocation
= 0;
467 static int total_allocation
= 0;
468 static int num_allocations
= 0;
470 png_voidp PNGCBAPI png_debug_malloc
PNGARG((png_structp png_ptr
,
471 png_alloc_size_t size
));
472 void PNGCBAPI png_debug_free
PNGARG((png_structp png_ptr
, png_voidp ptr
));
475 PNGCBAPI
png_debug_malloc(png_structp png_ptr
, png_alloc_size_t size
)
478 /* png_malloc has already tested for NULL; png_create_struct calls
479 * png_debug_malloc directly, with png_ptr == NULL which is OK
485 /* This calls the library allocator twice, once to get the requested
486 buffer and once to get a new free list entry. */
488 /* Disable malloc_fn and free_fn */
490 png_set_mem_fn(png_ptr
, NULL
, NULL
, NULL
);
491 pinfo
= (memory_infop
)png_malloc(png_ptr
,
494 current_allocation
+= size
;
495 total_allocation
+= size
;
498 if (current_allocation
> maximum_allocation
)
499 maximum_allocation
= current_allocation
;
501 pinfo
->pointer
= png_malloc(png_ptr
, size
);
502 /* Restore malloc_fn and free_fn */
504 png_set_mem_fn(png_ptr
,
505 NULL
, png_debug_malloc
, png_debug_free
);
507 if (size
!= 0 && pinfo
->pointer
== NULL
)
509 current_allocation
-= size
;
510 total_allocation
-= size
;
512 "out of memory in pngtest->png_debug_malloc");
515 pinfo
->next
= pinformation
;
516 pinformation
= pinfo
;
517 /* Make sure the caller isn't assuming zeroed memory. */
518 memset(pinfo
->pointer
, 0xdd, pinfo
->size
);
521 printf("png_malloc %lu bytes at %p\n", (unsigned long)size
,
524 return (png_voidp
)(pinfo
->pointer
);
528 /* Free a pointer. It is removed from the list at the same time. */
530 png_debug_free(png_structp png_ptr
, png_voidp ptr
)
533 fprintf(STDERR
, "NULL pointer to png_debug_free.\n");
537 #if 0 /* This happens all the time. */
538 fprintf(STDERR
, "WARNING: freeing NULL pointer\n");
543 /* Unlink the element from the list. */
545 memory_infop
*ppinfo
= &pinformation
;
549 memory_infop pinfo
= *ppinfo
;
551 if (pinfo
->pointer
== ptr
)
553 *ppinfo
= pinfo
->next
;
554 current_allocation
-= pinfo
->size
;
555 if (current_allocation
< 0)
556 fprintf(STDERR
, "Duplicate free of memory\n");
557 /* We must free the list element too, but first kill
558 the memory that is to be freed. */
559 memset(ptr
, 0x55, pinfo
->size
);
560 png_free_default(png_ptr
, pinfo
);
565 if (pinfo
->next
== NULL
)
567 fprintf(STDERR
, "Pointer %x not found\n", (unsigned int)ptr
);
571 ppinfo
= &pinfo
->next
;
575 /* Finally free the data. */
577 printf("Freeing %p\n", ptr
);
579 png_free_default(png_ptr
, ptr
);
582 #endif /* PNG_USER_MEM_SUPPORTED && PNG_DEBUG */
583 /* END of code to test memory allocation/deallocation */
586 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
587 /* Demonstration of user chunk support of the sTER and vpAg chunks */
589 /* (sTER is a public chunk not yet known by libpng. vpAg is a private
590 chunk used in ImageMagick to store "virtual page" size). */
592 static struct user_chunk_data
594 png_const_infop info_ptr
;
595 png_uint_32 vpAg_width
, vpAg_height
;
602 /* Used for location and order; zero means nothing. */
603 #define have_sTER 0x01
604 #define have_vpAg 0x02
605 #define before_PLTE 0x10
606 #define before_IDAT 0x20
607 #define after_IDAT 0x40
610 init_callback_info(png_const_infop info_ptr
)
612 MEMZERO(user_chunk_data
);
613 user_chunk_data
.info_ptr
= info_ptr
;
617 set_location(png_structp png_ptr
, struct user_chunk_data
*data
, int what
)
621 if ((data
->location
[0] & what
) || (data
->location
[1] & what
))
622 return 0; /* already have one of these */
624 /* Find where we are (the code below zeros info_ptr to indicate that the
625 * chunks before the first IDAT have been read.)
627 if (data
->info_ptr
== NULL
) /* after IDAT */
628 location
= what
| after_IDAT
;
630 else if (png_get_valid(png_ptr
, data
->info_ptr
, PNG_INFO_PLTE
))
631 location
= what
| before_IDAT
;
634 location
= what
| before_PLTE
;
636 if (data
->location
[0] == 0)
637 data
->location
[0] = location
;
640 data
->location
[1] = location
;
642 return 1; /* handled */
645 static int PNGCBAPI
read_user_chunk_callback(png_struct
*png_ptr
,
646 png_unknown_chunkp chunk
)
648 struct user_chunk_data
*my_user_chunk_data
=
649 (struct user_chunk_data
*)png_get_user_chunk_ptr(png_ptr
);
651 if (my_user_chunk_data
== NULL
)
652 png_error(png_ptr
, "lost user chunk pointer");
654 /* Return one of the following:
655 * return (-n); chunk had an error
656 * return (0); did not recognize
657 * return (n); success
659 * The unknown chunk structure contains the chunk data:
664 * Note that libpng has already taken care of the CRC handling.
667 if (chunk
->name
[0] == 115 && chunk
->name
[1] == 84 && /* s T */
668 chunk
->name
[2] == 69 && chunk
->name
[3] == 82) /* E R */
670 /* Found sTER chunk */
671 if (chunk
->size
!= 1)
672 return (-1); /* Error return */
674 if (chunk
->data
[0] != 0 && chunk
->data
[0] != 1)
675 return (-1); /* Invalid mode */
677 if (set_location(png_ptr
, my_user_chunk_data
, have_sTER
))
679 my_user_chunk_data
->sTER_mode
=chunk
->data
[0];
684 return (0); /* duplicate sTER - give it to libpng */
687 if (chunk
->name
[0] != 118 || chunk
->name
[1] != 112 || /* v p */
688 chunk
->name
[2] != 65 || chunk
->name
[3] != 103) /* A g */
689 return (0); /* Did not recognize */
691 /* Found ImageMagick vpAg chunk */
693 if (chunk
->size
!= 9)
694 return (-1); /* Error return */
696 if (!set_location(png_ptr
, my_user_chunk_data
, have_vpAg
))
697 return (0); /* duplicate vpAg */
699 my_user_chunk_data
->vpAg_width
= png_get_uint_31(png_ptr
, chunk
->data
);
700 my_user_chunk_data
->vpAg_height
= png_get_uint_31(png_ptr
, chunk
->data
+ 4);
701 my_user_chunk_data
->vpAg_units
= chunk
->data
[8];
706 #ifdef PNG_WRITE_SUPPORTED
708 write_sTER_chunk(png_structp write_ptr
)
710 png_byte png_sTER
[5] = {115, 84, 69, 82, '\0'};
713 fprintf(STDERR
, "\n stereo mode = %d\n", user_chunk_data
.sTER_mode
);
715 png_write_chunk(write_ptr
, png_sTER
, &user_chunk_data
.sTER_mode
, 1);
719 write_vpAg_chunk(png_structp write_ptr
)
721 png_byte png_vpAg
[5] = {118, 112, 65, 103, '\0'};
723 png_byte vpag_chunk_data
[9];
726 fprintf(STDERR
, " vpAg = %lu x %lu, units = %d\n",
727 (unsigned long)user_chunk_data
.vpAg_width
,
728 (unsigned long)user_chunk_data
.vpAg_height
,
729 user_chunk_data
.vpAg_units
);
731 png_save_uint_32(vpag_chunk_data
, user_chunk_data
.vpAg_width
);
732 png_save_uint_32(vpag_chunk_data
+ 4, user_chunk_data
.vpAg_height
);
733 vpag_chunk_data
[8] = user_chunk_data
.vpAg_units
;
734 png_write_chunk(write_ptr
, png_vpAg
, vpag_chunk_data
, 9);
738 write_chunks(png_structp write_ptr
, int location
)
742 /* Notice that this preserves the original chunk order, however chunks
743 * intercepted by the callback will be written *after* chunks passed to
744 * libpng. This will actually reverse a pair of sTER chunks or a pair of
745 * vpAg chunks, resulting in an error later. This is not worth worrying
746 * about - the chunks should not be duplicated!
750 if (user_chunk_data
.location
[i
] == (location
| have_sTER
))
751 write_sTER_chunk(write_ptr
);
753 else if (user_chunk_data
.location
[i
] == (location
| have_vpAg
))
754 write_vpAg_chunk(write_ptr
);
757 #endif /* PNG_WRITE_SUPPORTED */
758 #else /* !PNG_READ_USER_CHUNKS_SUPPORTED */
759 # define write_chunks(pp,loc) ((void)0)
761 /* END of code to demonstrate user chunk support */
763 /* START of code to check that libpng has the required text support; this only
764 * checks for the write support because if read support is missing the chunk
765 * will simply not be reported back to pngtest.
767 #ifdef PNG_TEXT_SUPPORTED
769 pngtest_check_text_support(png_structp png_ptr
, png_textp text_ptr
,
774 switch (text_ptr
[--num_text
].compression
)
776 case PNG_TEXT_COMPRESSION_NONE
:
779 case PNG_TEXT_COMPRESSION_zTXt
:
780 # ifndef PNG_WRITE_zTXt_SUPPORTED
781 ++unsupported_chunks
;
785 case PNG_ITXT_COMPRESSION_NONE
:
786 case PNG_ITXT_COMPRESSION_zTXt
:
787 # ifndef PNG_WRITE_iTXt_SUPPORTED
788 ++unsupported_chunks
;
793 /* This is an error */
794 png_error(png_ptr
, "invalid text chunk compression field");
800 /* END of code to check that libpng has the required text support */
804 test_one_file(PNG_CONST
char *inname
, PNG_CONST
char *outname
)
806 static png_FILE_p fpin
;
807 static png_FILE_p fpout
; /* "static" prevents setjmp corruption */
808 pngtest_error_parameters error_parameters
;
809 png_structp read_ptr
;
810 png_infop read_info_ptr
, end_info_ptr
;
811 #ifdef PNG_WRITE_SUPPORTED
812 png_structp write_ptr
;
813 png_infop write_info_ptr
;
814 png_infop write_end_info_ptr
;
816 png_structp write_ptr
= NULL
;
817 png_infop write_info_ptr
= NULL
;
818 png_infop write_end_info_ptr
= NULL
;
822 png_uint_32 width
, height
;
824 int bit_depth
, color_type
;
827 error_parameters
.file_name
= inname
;
829 if ((fpin
= fopen(inname
, "rb")) == NULL
)
831 fprintf(STDERR
, "Could not find input file %s\n", inname
);
835 if ((fpout
= fopen(outname
, "wb")) == NULL
)
837 fprintf(STDERR
, "Could not open output file %s\n", outname
);
842 pngtest_debug("Allocating read and write structures");
843 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
845 png_create_read_struct_2(PNG_LIBPNG_VER_STRING
, NULL
,
846 NULL
, NULL
, NULL
, png_debug_malloc
, png_debug_free
);
849 png_create_read_struct(PNG_LIBPNG_VER_STRING
, NULL
, NULL
, NULL
);
851 png_set_error_fn(read_ptr
, &error_parameters
, pngtest_error
,
854 #ifdef PNG_WRITE_SUPPORTED
855 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
857 png_create_write_struct_2(PNG_LIBPNG_VER_STRING
, NULL
,
858 NULL
, NULL
, NULL
, png_debug_malloc
, png_debug_free
);
861 png_create_write_struct(PNG_LIBPNG_VER_STRING
, NULL
, NULL
, NULL
);
863 png_set_error_fn(write_ptr
, &error_parameters
, pngtest_error
,
866 pngtest_debug("Allocating read_info, write_info and end_info structures");
867 read_info_ptr
= png_create_info_struct(read_ptr
);
868 end_info_ptr
= png_create_info_struct(read_ptr
);
869 #ifdef PNG_WRITE_SUPPORTED
870 write_info_ptr
= png_create_info_struct(write_ptr
);
871 write_end_info_ptr
= png_create_info_struct(write_ptr
);
874 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
875 init_callback_info(read_info_ptr
);
876 png_set_read_user_chunk_fn(read_ptr
, &user_chunk_data
,
877 read_user_chunk_callback
);
880 #ifdef PNG_SETJMP_SUPPORTED
881 pngtest_debug("Setting jmpbuf for read struct");
882 if (setjmp(png_jmpbuf(read_ptr
)))
884 fprintf(STDERR
, "%s -> %s: libpng read error\n", inname
, outname
);
885 png_free(read_ptr
, row_buf
);
887 png_destroy_read_struct(&read_ptr
, &read_info_ptr
, &end_info_ptr
);
888 #ifdef PNG_WRITE_SUPPORTED
889 png_destroy_info_struct(write_ptr
, &write_end_info_ptr
);
890 png_destroy_write_struct(&write_ptr
, &write_info_ptr
);
897 #ifdef PNG_WRITE_SUPPORTED
898 pngtest_debug("Setting jmpbuf for write struct");
900 if (setjmp(png_jmpbuf(write_ptr
)))
902 fprintf(STDERR
, "%s -> %s: libpng write error\n", inname
, outname
);
903 png_destroy_read_struct(&read_ptr
, &read_info_ptr
, &end_info_ptr
);
904 png_destroy_info_struct(write_ptr
, &write_end_info_ptr
);
905 #ifdef PNG_WRITE_SUPPORTED
906 png_destroy_write_struct(&write_ptr
, &write_info_ptr
);
917 /* Treat png_benign_error() as errors on read */
918 png_set_benign_errors(read_ptr
, 0);
920 #ifdef PNG_WRITE_SUPPORTED
921 /* Treat them as errors on write */
922 png_set_benign_errors(write_ptr
, 0);
925 /* if strict is not set, then app warnings and errors are treated as
926 * warnings in release builds, but not in unstable builds; this can be
927 * changed with '--relaxed'.
933 /* Allow application (pngtest) errors and warnings to pass */
934 png_set_benign_errors(read_ptr
, 1);
936 #ifdef PNG_WRITE_SUPPORTED
937 png_set_benign_errors(write_ptr
, 1);
941 pngtest_debug("Initializing input and output streams");
942 #ifdef PNG_STDIO_SUPPORTED
943 png_init_io(read_ptr
, fpin
);
944 # ifdef PNG_WRITE_SUPPORTED
945 png_init_io(write_ptr
, fpout
);
948 png_set_read_fn(read_ptr
, (png_voidp
)fpin
, pngtest_read_data
);
949 # ifdef PNG_WRITE_SUPPORTED
950 png_set_write_fn(write_ptr
, (png_voidp
)fpout
, pngtest_write_data
,
951 # ifdef PNG_WRITE_FLUSH_SUPPORTED
959 if (status_dots_requested
== 1)
961 #ifdef PNG_WRITE_SUPPORTED
962 png_set_write_status_fn(write_ptr
, write_row_callback
);
964 png_set_read_status_fn(read_ptr
, read_row_callback
);
969 #ifdef PNG_WRITE_SUPPORTED
970 png_set_write_status_fn(write_ptr
, NULL
);
972 png_set_read_status_fn(read_ptr
, NULL
);
975 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
979 for (i
= 0; i
<256; i
++)
982 png_set_read_user_transform_fn(read_ptr
, count_filters
);
985 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
987 png_set_write_user_transform_fn(write_ptr
, count_zero_samples
);
990 #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
991 /* Preserve all the unknown chunks, if possible. If this is disabled then,
992 * even if the png_{get,set}_unknown_chunks stuff is enabled, we can't use
993 * libpng to *save* the unknown chunks on read (because we can't switch the
996 * Notice that if SET_UNKNOWN_CHUNKS is *not* supported read will discard all
997 * unknown chunks and write will write them all.
999 #ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
1000 png_set_keep_unknown_chunks(read_ptr
, PNG_HANDLE_CHUNK_ALWAYS
,
1003 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1004 png_set_keep_unknown_chunks(write_ptr
, PNG_HANDLE_CHUNK_ALWAYS
,
1009 pngtest_debug("Reading info struct");
1010 png_read_info(read_ptr
, read_info_ptr
);
1012 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1013 /* This is a bit of a hack; there is no obvious way in the callback function
1014 * to determine that the chunks before the first IDAT have been read, so
1015 * remove the info_ptr (which is only used to determine position relative to
1016 * PLTE) here to indicate that we are after the IDAT.
1018 user_chunk_data
.info_ptr
= NULL
;
1021 pngtest_debug("Transferring info struct");
1023 int interlace_type
, compression_type
, filter_type
;
1025 if (png_get_IHDR(read_ptr
, read_info_ptr
, &width
, &height
, &bit_depth
,
1026 &color_type
, &interlace_type
, &compression_type
, &filter_type
))
1028 png_set_IHDR(write_ptr
, write_info_ptr
, width
, height
, bit_depth
,
1029 #ifdef PNG_WRITE_INTERLACING_SUPPORTED
1030 color_type
, interlace_type
, compression_type
, filter_type
);
1032 color_type
, PNG_INTERLACE_NONE
, compression_type
, filter_type
);
1036 #ifdef PNG_FIXED_POINT_SUPPORTED
1037 #ifdef PNG_cHRM_SUPPORTED
1039 png_fixed_point white_x
, white_y
, red_x
, red_y
, green_x
, green_y
, blue_x
,
1042 if (png_get_cHRM_fixed(read_ptr
, read_info_ptr
, &white_x
, &white_y
,
1043 &red_x
, &red_y
, &green_x
, &green_y
, &blue_x
, &blue_y
))
1045 png_set_cHRM_fixed(write_ptr
, write_info_ptr
, white_x
, white_y
, red_x
,
1046 red_y
, green_x
, green_y
, blue_x
, blue_y
);
1050 #ifdef PNG_gAMA_SUPPORTED
1052 png_fixed_point gamma
;
1054 if (png_get_gAMA_fixed(read_ptr
, read_info_ptr
, &gamma
))
1055 png_set_gAMA_fixed(write_ptr
, write_info_ptr
, gamma
);
1058 #else /* Use floating point versions */
1059 #ifdef PNG_FLOATING_POINT_SUPPORTED
1060 #ifdef PNG_cHRM_SUPPORTED
1062 double white_x
, white_y
, red_x
, red_y
, green_x
, green_y
, blue_x
,
1065 if (png_get_cHRM(read_ptr
, read_info_ptr
, &white_x
, &white_y
, &red_x
,
1066 &red_y
, &green_x
, &green_y
, &blue_x
, &blue_y
))
1068 png_set_cHRM(write_ptr
, write_info_ptr
, white_x
, white_y
, red_x
,
1069 red_y
, green_x
, green_y
, blue_x
, blue_y
);
1073 #ifdef PNG_gAMA_SUPPORTED
1077 if (png_get_gAMA(read_ptr
, read_info_ptr
, &gamma
))
1078 png_set_gAMA(write_ptr
, write_info_ptr
, gamma
);
1081 #endif /* Floating point */
1082 #endif /* Fixed point */
1083 #ifdef PNG_iCCP_SUPPORTED
1087 png_uint_32 proflen
;
1088 int compression_type
;
1090 if (png_get_iCCP(read_ptr
, read_info_ptr
, &name
, &compression_type
,
1091 &profile
, &proflen
))
1093 png_set_iCCP(write_ptr
, write_info_ptr
, name
, compression_type
,
1098 #ifdef PNG_sRGB_SUPPORTED
1102 if (png_get_sRGB(read_ptr
, read_info_ptr
, &intent
))
1103 png_set_sRGB(write_ptr
, write_info_ptr
, intent
);
1110 if (png_get_PLTE(read_ptr
, read_info_ptr
, &palette
, &num_palette
))
1111 png_set_PLTE(write_ptr
, write_info_ptr
, palette
, num_palette
);
1113 #ifdef PNG_bKGD_SUPPORTED
1115 png_color_16p background
;
1117 if (png_get_bKGD(read_ptr
, read_info_ptr
, &background
))
1119 png_set_bKGD(write_ptr
, write_info_ptr
, background
);
1123 #ifdef PNG_hIST_SUPPORTED
1127 if (png_get_hIST(read_ptr
, read_info_ptr
, &hist
))
1128 png_set_hIST(write_ptr
, write_info_ptr
, hist
);
1131 #ifdef PNG_oFFs_SUPPORTED
1133 png_int_32 offset_x
, offset_y
;
1136 if (png_get_oFFs(read_ptr
, read_info_ptr
, &offset_x
, &offset_y
,
1139 png_set_oFFs(write_ptr
, write_info_ptr
, offset_x
, offset_y
, unit_type
);
1143 #ifdef PNG_pCAL_SUPPORTED
1145 png_charp purpose
, units
;
1150 if (png_get_pCAL(read_ptr
, read_info_ptr
, &purpose
, &X0
, &X1
, &type
,
1151 &nparams
, &units
, ¶ms
))
1153 png_set_pCAL(write_ptr
, write_info_ptr
, purpose
, X0
, X1
, type
,
1154 nparams
, units
, params
);
1158 #ifdef PNG_pHYs_SUPPORTED
1160 png_uint_32 res_x
, res_y
;
1163 if (png_get_pHYs(read_ptr
, read_info_ptr
, &res_x
, &res_y
, &unit_type
))
1164 png_set_pHYs(write_ptr
, write_info_ptr
, res_x
, res_y
, unit_type
);
1167 #ifdef PNG_sBIT_SUPPORTED
1169 png_color_8p sig_bit
;
1171 if (png_get_sBIT(read_ptr
, read_info_ptr
, &sig_bit
))
1172 png_set_sBIT(write_ptr
, write_info_ptr
, sig_bit
);
1175 #ifdef PNG_sCAL_SUPPORTED
1176 #ifdef PNG_FLOATING_POINT_SUPPORTED
1179 double scal_width
, scal_height
;
1181 if (png_get_sCAL(read_ptr
, read_info_ptr
, &unit
, &scal_width
,
1184 png_set_sCAL(write_ptr
, write_info_ptr
, unit
, scal_width
, scal_height
);
1188 #ifdef PNG_FIXED_POINT_SUPPORTED
1191 png_charp scal_width
, scal_height
;
1193 if (png_get_sCAL_s(read_ptr
, read_info_ptr
, &unit
, &scal_width
,
1196 png_set_sCAL_s(write_ptr
, write_info_ptr
, unit
, scal_width
,
1203 #ifdef PNG_TEXT_SUPPORTED
1208 if (png_get_text(read_ptr
, read_info_ptr
, &text_ptr
, &num_text
) > 0)
1210 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text
);
1212 pngtest_check_text_support(read_ptr
, text_ptr
, num_text
);
1219 for (i
=0; i
<num_text
; i
++)
1221 printf(" Text compression[%d]=%d\n",
1222 i
, text_ptr
[i
].compression
);
1226 png_set_text(write_ptr
, write_info_ptr
, text_ptr
, num_text
);
1230 #ifdef PNG_tIME_SUPPORTED
1234 if (png_get_tIME(read_ptr
, read_info_ptr
, &mod_time
))
1236 png_set_tIME(write_ptr
, write_info_ptr
, mod_time
);
1237 #ifdef PNG_TIME_RFC1123_SUPPORTED
1238 /* We have to use memcpy instead of "=" because the string
1239 * pointed to by png_convert_to_rfc1123() gets free'ed before
1243 png_convert_to_rfc1123(read_ptr
, mod_time
),
1244 png_sizeof(tIME_string
));
1246 tIME_string
[png_sizeof(tIME_string
) - 1] = '\0';
1247 tIME_chunk_present
++;
1248 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1252 #ifdef PNG_tRNS_SUPPORTED
1254 png_bytep trans_alpha
;
1256 png_color_16p trans_color
;
1258 if (png_get_tRNS(read_ptr
, read_info_ptr
, &trans_alpha
, &num_trans
,
1261 int sample_max
= (1 << bit_depth
);
1262 /* libpng doesn't reject a tRNS chunk with out-of-range samples */
1263 if (!((color_type
== PNG_COLOR_TYPE_GRAY
&&
1264 (int)trans_color
->gray
> sample_max
) ||
1265 (color_type
== PNG_COLOR_TYPE_RGB
&&
1266 ((int)trans_color
->red
> sample_max
||
1267 (int)trans_color
->green
> sample_max
||
1268 (int)trans_color
->blue
> sample_max
))))
1269 png_set_tRNS(write_ptr
, write_info_ptr
, trans_alpha
, num_trans
,
1274 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1276 png_unknown_chunkp unknowns
;
1277 int num_unknowns
= png_get_unknown_chunks(read_ptr
, read_info_ptr
,
1282 png_set_unknown_chunks(write_ptr
, write_info_ptr
, unknowns
,
1284 #if PNG_LIBPNG_VER < 10600
1285 /* Copy the locations from the read_info_ptr. The automatically
1286 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1287 * because they are reset from the write pointer (removed in 1.6.0).
1291 for (i
= 0; i
< num_unknowns
; i
++)
1292 png_set_unknown_chunk_location(write_ptr
, write_info_ptr
, i
,
1293 unknowns
[i
].location
);
1300 #ifdef PNG_WRITE_SUPPORTED
1301 pngtest_debug("Writing info struct");
1303 /* Write the info in two steps so that if we write the 'unknown' chunks here
1304 * they go to the correct place.
1306 png_write_info_before_PLTE(write_ptr
, write_info_ptr
);
1308 write_chunks(write_ptr
, before_PLTE
); /* before PLTE */
1310 png_write_info(write_ptr
, write_info_ptr
);
1312 write_chunks(write_ptr
, before_IDAT
); /* after PLTE */
1315 #ifdef SINGLE_ROWBUF_ALLOC
1316 pngtest_debug("Allocating row buffer...");
1317 row_buf
= (png_bytep
)png_malloc(read_ptr
,
1318 png_get_rowbytes(read_ptr
, read_info_ptr
));
1320 pngtest_debug1("\t0x%08lx", (unsigned long)row_buf
);
1321 #endif /* SINGLE_ROWBUF_ALLOC */
1322 pngtest_debug("Writing row data");
1324 #if defined(PNG_READ_INTERLACING_SUPPORTED) || \
1325 defined(PNG_WRITE_INTERLACING_SUPPORTED)
1326 num_pass
= png_set_interlace_handling(read_ptr
);
1327 # ifdef PNG_WRITE_SUPPORTED
1328 png_set_interlace_handling(write_ptr
);
1334 #ifdef PNGTEST_TIMING
1335 t_stop
= (float)clock();
1336 t_misc
+= (t_stop
- t_start
);
1339 for (pass
= 0; pass
< num_pass
; pass
++)
1341 pngtest_debug1("Writing row data for pass %d", pass
);
1342 for (y
= 0; y
< height
; y
++)
1344 #ifndef SINGLE_ROWBUF_ALLOC
1345 pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass
, y
);
1346 row_buf
= (png_bytep
)png_malloc(read_ptr
,
1347 png_get_rowbytes(read_ptr
, read_info_ptr
));
1349 pngtest_debug2("\t0x%08lx (%u bytes)", (unsigned long)row_buf
,
1350 png_get_rowbytes(read_ptr
, read_info_ptr
));
1352 #endif /* !SINGLE_ROWBUF_ALLOC */
1353 png_read_rows(read_ptr
, (png_bytepp
)&row_buf
, NULL
, 1);
1355 #ifdef PNG_WRITE_SUPPORTED
1356 #ifdef PNGTEST_TIMING
1357 t_stop
= (float)clock();
1358 t_decode
+= (t_stop
- t_start
);
1361 png_write_rows(write_ptr
, (png_bytepp
)&row_buf
, 1);
1362 #ifdef PNGTEST_TIMING
1363 t_stop
= (float)clock();
1364 t_encode
+= (t_stop
- t_start
);
1367 #endif /* PNG_WRITE_SUPPORTED */
1369 #ifndef SINGLE_ROWBUF_ALLOC
1370 pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass
, y
);
1371 png_free(read_ptr
, row_buf
);
1373 #endif /* !SINGLE_ROWBUF_ALLOC */
1377 #ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1378 png_free_data(read_ptr
, read_info_ptr
, PNG_FREE_UNKN
, -1);
1380 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1381 png_free_data(write_ptr
, write_info_ptr
, PNG_FREE_UNKN
, -1);
1384 pngtest_debug("Reading and writing end_info data");
1386 png_read_end(read_ptr
, end_info_ptr
);
1387 #ifdef PNG_TEXT_SUPPORTED
1392 if (png_get_text(read_ptr
, end_info_ptr
, &text_ptr
, &num_text
) > 0)
1394 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text
);
1396 pngtest_check_text_support(read_ptr
, text_ptr
, num_text
);
1403 for (i
=0; i
<num_text
; i
++)
1405 printf(" Text compression[%d]=%d\n",
1406 i
, text_ptr
[i
].compression
);
1410 png_set_text(write_ptr
, write_end_info_ptr
, text_ptr
, num_text
);
1414 #ifdef PNG_tIME_SUPPORTED
1418 if (png_get_tIME(read_ptr
, end_info_ptr
, &mod_time
))
1420 png_set_tIME(write_ptr
, write_end_info_ptr
, mod_time
);
1421 #ifdef PNG_TIME_RFC1123_SUPPORTED
1422 /* We have to use memcpy instead of "=" because the string
1423 pointed to by png_convert_to_rfc1123() gets free'ed before
1426 png_convert_to_rfc1123(read_ptr
, mod_time
),
1427 png_sizeof(tIME_string
));
1429 tIME_string
[png_sizeof(tIME_string
) - 1] = '\0';
1430 tIME_chunk_present
++;
1431 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1435 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1437 png_unknown_chunkp unknowns
;
1438 int num_unknowns
= png_get_unknown_chunks(read_ptr
, end_info_ptr
,
1443 png_set_unknown_chunks(write_ptr
, write_end_info_ptr
, unknowns
,
1445 #if PNG_LIBPNG_VER < 10600
1446 /* Copy the locations from the read_info_ptr. The automatically
1447 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1448 * because they are reset from the write pointer (removed in 1.6.0).
1452 for (i
= 0; i
< num_unknowns
; i
++)
1453 png_set_unknown_chunk_location(write_ptr
, write_end_info_ptr
, i
,
1454 unknowns
[i
].location
);
1461 #ifdef PNG_WRITE_SUPPORTED
1462 #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
1463 /* Normally one would use Z_DEFAULT_STRATEGY for text compression.
1464 * This is here just to make pngtest replicate the results from libpng
1465 * versions prior to 1.5.4, and to test this new API.
1467 png_set_text_compression_strategy(write_ptr
, Z_FILTERED
);
1470 /* When the unknown vpAg/sTER chunks are written by pngtest the only way to
1471 * do it is to write them *before* calling png_write_end. When unknown
1472 * chunks are written by libpng, however, they are written just before IEND. * There seems to be no way round this, however vpAg/sTER are not expected
1475 write_chunks(write_ptr
, after_IDAT
);
1477 png_write_end(write_ptr
, write_end_info_ptr
);
1480 #ifdef PNG_EASY_ACCESS_SUPPORTED
1483 png_uint_32 iwidth
, iheight
;
1484 iwidth
= png_get_image_width(write_ptr
, write_info_ptr
);
1485 iheight
= png_get_image_height(write_ptr
, write_info_ptr
);
1486 fprintf(STDERR
, "\n Image width = %lu, height = %lu\n",
1487 (unsigned long)iwidth
, (unsigned long)iheight
);
1491 pngtest_debug("Destroying data structs");
1492 #ifdef SINGLE_ROWBUF_ALLOC
1493 pngtest_debug("destroying row_buf for read_ptr");
1494 png_free(read_ptr
, row_buf
);
1496 #endif /* SINGLE_ROWBUF_ALLOC */
1497 pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr");
1498 png_destroy_read_struct(&read_ptr
, &read_info_ptr
, &end_info_ptr
);
1499 #ifdef PNG_WRITE_SUPPORTED
1500 pngtest_debug("destroying write_end_info_ptr");
1501 png_destroy_info_struct(write_ptr
, &write_end_info_ptr
);
1502 pngtest_debug("destroying write_ptr, write_info_ptr");
1503 png_destroy_write_struct(&write_ptr
, &write_info_ptr
);
1505 pngtest_debug("Destruction complete.");
1510 /* Summarize any warnings or errors and in 'strict' mode fail the test.
1511 * Unsupported chunks can result in warnings, in that case ignore the strict
1512 * setting, otherwise fail the test on warnings as well as errors.
1514 if (error_count
> 0)
1516 /* We don't really expect to get here because of the setjmp handling
1517 * above, but this is safe.
1519 fprintf(STDERR
, "\n %s: %d libpng errors found (%d warnings)",
1520 inname
, error_count
, warning_count
);
1526 # ifdef PNG_WRITE_SUPPORTED
1527 /* If there we no write support nothing was written! */
1528 else if (unsupported_chunks
> 0)
1530 fprintf(STDERR
, "\n %s: unsupported chunks (%d)%s",
1531 inname
, unsupported_chunks
, strict
? ": IGNORED --strict!" : "");
1535 else if (warning_count
> 0)
1537 fprintf(STDERR
, "\n %s: %d libpng warnings found",
1538 inname
, warning_count
);
1544 pngtest_debug("Opening files for comparison");
1545 if ((fpin
= fopen(inname
, "rb")) == NULL
)
1547 fprintf(STDERR
, "Could not find file %s\n", inname
);
1551 if ((fpout
= fopen(outname
, "rb")) == NULL
)
1553 fprintf(STDERR
, "Could not find file %s\n", outname
);
1558 #ifdef PNG_WRITE_SUPPORTED /* else nothing was written */
1560 int wrote_question
= 0;
1564 png_size_t num_in
, num_out
;
1565 char inbuf
[256], outbuf
[256];
1568 num_in
= fread(inbuf
, 1, sizeof inbuf
, fpin
);
1569 num_out
= fread(outbuf
, 1, sizeof outbuf
, fpout
);
1571 if (num_in
!= num_out
)
1573 fprintf(STDERR
, "\nFiles %s and %s are of a different size\n",
1576 if (wrote_question
== 0 && unsupported_chunks
== 0)
1579 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1580 inname
, PNG_ZBUF_SIZE
);
1582 "\n filtering heuristic (libpng default), compression");
1584 " level (zlib default),\n and zlib version (%s)?\n\n",
1592 if (strict
!= 0 && unsupported_chunks
== 0)
1602 if (memcmp(inbuf
, outbuf
, num_in
))
1604 fprintf(STDERR
, "\nFiles %s and %s are different\n", inname
,
1607 if (wrote_question
== 0 && unsupported_chunks
== 0)
1610 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1611 inname
, PNG_ZBUF_SIZE
);
1613 "\n filtering heuristic (libpng default), compression");
1615 " level (zlib default),\n and zlib version (%s)?\n\n",
1623 /* NOTE: the unsupported_chunks escape is permitted here because
1624 * unsupported text chunk compression will result in the compression
1625 * mode being changed (to NONE) yet, in the test case, the result
1626 * can be exactly the same size!
1628 if (strict
!= 0 && unsupported_chunks
== 0)
1636 #endif /* PNG_WRITE_SUPPORTED */
1644 /* Input and output filenames */
1646 static PNG_CONST
char *inname
= "pngtest/png";
1647 static PNG_CONST
char *outname
= "pngout/png";
1649 static PNG_CONST
char *inname
= "pngtest.png";
1650 static PNG_CONST
char *outname
= "pngout.png";
1654 main(int argc
, char *argv
[])
1659 fprintf(STDERR
, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING
);
1660 fprintf(STDERR
, " with zlib version %s\n", ZLIB_VERSION
);
1661 fprintf(STDERR
, "%s", png_get_copyright(NULL
));
1662 /* Show the version of libpng used in building the library */
1663 fprintf(STDERR
, " library (%lu):%s",
1664 (unsigned long)png_access_version_number(),
1665 png_get_header_version(NULL
));
1667 /* Show the version of libpng used in building the application */
1668 fprintf(STDERR
, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER
,
1669 PNG_HEADER_VERSION_STRING
);
1671 /* Do some consistency checking on the memory allocation settings, I'm
1672 * not sure this matters, but it is nice to know, the first of these
1673 * tests should be impossible because of the way the macros are set
1676 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1677 fprintf(STDERR
, " NOTE: Zlib compiled for max 64k, libpng not\n");
1679 /* I think the following can happen. */
1680 #if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1681 fprintf(STDERR
, " NOTE: libpng compiled for max 64k, zlib not\n");
1684 if (strcmp(png_libpng_ver
, PNG_LIBPNG_VER_STRING
))
1687 "Warning: versions are different between png.h and png.c\n");
1688 fprintf(STDERR
, " png.h version: %s\n", PNG_LIBPNG_VER_STRING
);
1689 fprintf(STDERR
, " png.c version: %s\n\n", png_libpng_ver
);
1695 if (strcmp(argv
[1], "-m") == 0)
1698 status_dots_requested
= 0;
1701 else if (strcmp(argv
[1], "-mv") == 0 ||
1702 strcmp(argv
[1], "-vm") == 0 )
1706 status_dots_requested
= 1;
1709 else if (strcmp(argv
[1], "-v") == 0)
1712 status_dots_requested
= 1;
1716 else if (strcmp(argv
[1], "--strict") == 0)
1718 status_dots_requested
= 0;
1725 else if (strcmp(argv
[1], "--relaxed") == 0)
1727 status_dots_requested
= 0;
1737 status_dots_requested
= 0;
1741 if (!multiple
&& argc
== 3 + verbose
)
1742 outname
= argv
[2 + verbose
];
1744 if ((!multiple
&& argc
> 3 + verbose
) || (multiple
&& argc
< 2))
1747 "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
1750 " reads/writes one PNG file (without -m) or multiple files (-m)\n");
1752 " with -m %s is used as a temporary file\n", outname
);
1759 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1760 int allocation_now
= current_allocation
;
1762 for (i
=2; i
<argc
; ++i
)
1765 fprintf(STDERR
, "\n Testing %s:", argv
[i
]);
1766 kerror
= test_one_file(argv
[i
], outname
);
1769 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1772 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1773 fprintf(STDERR
, "\n PASS (%lu zero samples)\n",
1774 (unsigned long)zero_samples
);
1776 fprintf(STDERR
, " PASS\n");
1778 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1779 for (k
= 0; k
<256; k
++)
1780 if (filters_used
[k
])
1781 fprintf(STDERR
, " Filter %d was used %lu times\n",
1782 k
, (unsigned long)filters_used
[k
]);
1784 #ifdef PNG_TIME_RFC1123_SUPPORTED
1785 if (tIME_chunk_present
!= 0)
1786 fprintf(STDERR
, " tIME = %s\n", tIME_string
);
1788 tIME_chunk_present
= 0;
1789 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1794 fprintf(STDERR
, " FAIL\n");
1797 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1798 if (allocation_now
!= current_allocation
)
1799 fprintf(STDERR
, "MEMORY ERROR: %d bytes lost\n",
1800 current_allocation
- allocation_now
);
1802 if (current_allocation
!= 0)
1804 memory_infop pinfo
= pinformation
;
1806 fprintf(STDERR
, "MEMORY ERROR: %d bytes still allocated\n",
1807 current_allocation
);
1809 while (pinfo
!= NULL
)
1811 fprintf(STDERR
, " %lu bytes at %x\n",
1812 (unsigned long)pinfo
->size
,
1813 (unsigned int)pinfo
->pointer
);
1814 pinfo
= pinfo
->next
;
1819 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1820 fprintf(STDERR
, " Current memory allocation: %10d bytes\n",
1821 current_allocation
);
1822 fprintf(STDERR
, " Maximum memory allocation: %10d bytes\n",
1823 maximum_allocation
);
1824 fprintf(STDERR
, " Total memory allocation: %10d bytes\n",
1826 fprintf(STDERR
, " Number of allocations: %10d\n",
1834 for (i
= 0; i
<3; ++i
)
1837 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1838 int allocation_now
= current_allocation
;
1841 status_dots_requested
= 1;
1843 else if (verbose
== 0)
1844 status_dots_requested
= 0;
1846 if (i
== 0 || verbose
== 1 || ierror
!= 0)
1847 fprintf(STDERR
, "\n Testing %s:", inname
);
1849 kerror
= test_one_file(inname
, outname
);
1853 if (verbose
== 1 || i
== 2)
1855 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1858 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1859 fprintf(STDERR
, "\n PASS (%lu zero samples)\n",
1860 (unsigned long)zero_samples
);
1862 fprintf(STDERR
, " PASS\n");
1864 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1865 for (k
= 0; k
<256; k
++)
1866 if (filters_used
[k
])
1867 fprintf(STDERR
, " Filter %d was used %lu times\n",
1868 k
, (unsigned long)filters_used
[k
]);
1870 #ifdef PNG_TIME_RFC1123_SUPPORTED
1871 if (tIME_chunk_present
!= 0)
1872 fprintf(STDERR
, " tIME = %s\n", tIME_string
);
1873 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1879 if (verbose
== 0 && i
!= 2)
1880 fprintf(STDERR
, "\n Testing %s:", inname
);
1882 fprintf(STDERR
, " FAIL\n");
1885 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1886 if (allocation_now
!= current_allocation
)
1887 fprintf(STDERR
, "MEMORY ERROR: %d bytes lost\n",
1888 current_allocation
- allocation_now
);
1890 if (current_allocation
!= 0)
1892 memory_infop pinfo
= pinformation
;
1894 fprintf(STDERR
, "MEMORY ERROR: %d bytes still allocated\n",
1895 current_allocation
);
1897 while (pinfo
!= NULL
)
1899 fprintf(STDERR
, " %lu bytes at %x\n",
1900 (unsigned long)pinfo
->size
, (unsigned int)pinfo
->pointer
);
1901 pinfo
= pinfo
->next
;
1906 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1907 fprintf(STDERR
, " Current memory allocation: %10d bytes\n",
1908 current_allocation
);
1909 fprintf(STDERR
, " Maximum memory allocation: %10d bytes\n",
1910 maximum_allocation
);
1911 fprintf(STDERR
, " Total memory allocation: %10d bytes\n",
1913 fprintf(STDERR
, " Number of allocations: %10d\n",
1918 #ifdef PNGTEST_TIMING
1919 t_stop
= (float)clock();
1920 t_misc
+= (t_stop
- t_start
);
1922 fprintf(STDERR
, " CPU time used = %.3f seconds",
1923 (t_misc
+t_decode
+t_encode
)/(float)CLOCKS_PER_SEC
);
1924 fprintf(STDERR
, " (decoding %.3f,\n",
1925 t_decode
/(float)CLOCKS_PER_SEC
);
1926 fprintf(STDERR
, " encoding %.3f ,",
1927 t_encode
/(float)CLOCKS_PER_SEC
);
1928 fprintf(STDERR
, " other %.3f seconds)\n\n",
1929 t_misc
/(float)CLOCKS_PER_SEC
);
1933 fprintf(STDERR
, " libpng passes test\n");
1936 fprintf(STDERR
, " libpng FAILS test\n");
1938 return (int)(ierror
!= 0);
1945 " test ignored because libpng was not built with read support\n");
1950 /* Generate a compiler error if there is an old png.h in the search path. */
1951 typedef png_libpng_version_1_5_14 Your_png_h_is_not_version_1_5_14
;