2 /* pngtest.c - a simple test program to test libpng
4 * Last changed in libpng 1.6.9 [February 6, 2014]
5 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
6 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
7 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
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 /* Known chunks that exist in pngtest.png must be supported or pngtest will fail
47 * simply as a result of re-ordering them. This may be fixed in 1.7
49 * pngtest allocates a single row buffer for each row and overwrites it,
50 * therefore if the write side doesn't support the writing of interlaced images
51 * nothing can be done for an interlaced image (and the code below will fail
52 * horribly trying to write extra data after writing garbage).
54 #if defined PNG_READ_SUPPORTED && /* else nothing can be done */\
55 defined PNG_READ_bKGD_SUPPORTED &&\
56 defined PNG_READ_cHRM_SUPPORTED &&\
57 defined PNG_READ_gAMA_SUPPORTED &&\
58 defined PNG_READ_oFFs_SUPPORTED &&\
59 defined PNG_READ_pCAL_SUPPORTED &&\
60 defined PNG_READ_pHYs_SUPPORTED &&\
61 defined PNG_READ_sBIT_SUPPORTED &&\
62 defined PNG_READ_sCAL_SUPPORTED &&\
63 defined PNG_READ_sRGB_SUPPORTED &&\
64 defined PNG_READ_tEXt_SUPPORTED &&\
65 defined PNG_READ_tIME_SUPPORTED &&\
66 defined PNG_READ_zTXt_SUPPORTED &&\
67 defined PNG_WRITE_INTERLACING_SUPPORTED
69 #ifdef PNG_ZLIB_HEADER
70 # include PNG_ZLIB_HEADER /* defined by pnglibconf.h from 1.7 */
75 /* Copied from pngpriv.h but only used in error messages below. */
77 # define PNG_ZBUF_SIZE 8192
79 #define FCLOSE(file) fclose(file)
81 #ifndef PNG_STDIO_SUPPORTED
82 typedef FILE * png_FILE_p
;
85 /* Makes pngtest verbose so we can find problems. */
91 # define pngtest_debug(m) ((void)fprintf(stderr, m "\n"))
92 # define pngtest_debug1(m,p1) ((void)fprintf(stderr, m "\n", p1))
93 # define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2))
95 # define pngtest_debug(m) ((void)0)
96 # define pngtest_debug1(m,p1) ((void)0)
97 # define pngtest_debug2(m,p1,p2) ((void)0)
101 # define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */
104 /* Turn on CPU timing
105 #define PNGTEST_TIMING
108 #ifndef PNG_FLOATING_POINT_SUPPORTED
109 #undef PNGTEST_TIMING
112 #ifdef PNGTEST_TIMING
113 static float t_start
, t_stop
, t_decode
, t_encode
, t_misc
;
117 #ifdef PNG_TIME_RFC1123_SUPPORTED
118 #define PNG_tIME_STRING_LENGTH 29
119 static int tIME_chunk_present
= 0;
120 static char tIME_string
[PNG_tIME_STRING_LENGTH
] = "tIME chunk is not present";
123 static int verbose
= 0;
124 static int strict
= 0;
125 static int relaxed
= 0;
126 static int unsupported_chunks
= 0; /* chunk unsupported by libpng in input */
127 static int error_count
= 0; /* count calls to png_error */
128 static int warning_count
= 0; /* count calls to png_warning */
130 /* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
132 # define png_jmpbuf(png_ptr) png_ptr->jmpbuf
135 /* Defines for unknown chunk handling if required. */
136 #ifndef PNG_HANDLE_CHUNK_ALWAYS
137 # define PNG_HANDLE_CHUNK_ALWAYS 3
139 #ifndef PNG_HANDLE_CHUNK_IF_SAFE
140 # define PNG_HANDLE_CHUNK_IF_SAFE 2
143 /* Utility to save typing/errors, the argument must be a name */
144 #define MEMZERO(var) ((void)memset(&var, 0, sizeof var))
146 /* Example of using row callbacks to make a simple progress meter */
147 static int status_pass
= 1;
148 static int status_dots_requested
= 0;
149 static int status_dots
= 1;
152 read_row_callback(png_structp png_ptr
, png_uint_32 row_number
, int pass
)
154 if (png_ptr
== NULL
|| row_number
> PNG_UINT_31_MAX
)
157 if (status_pass
!= pass
)
159 fprintf(stdout
, "\n Pass %d: ", pass
);
166 if (status_dots
== 0)
168 fprintf(stdout
, "\n ");
172 fprintf(stdout
, "r");
175 #ifdef PNG_WRITE_SUPPORTED
177 write_row_callback(png_structp png_ptr
, png_uint_32 row_number
, int pass
)
179 if (png_ptr
== NULL
|| row_number
> PNG_UINT_31_MAX
|| pass
> 7)
182 fprintf(stdout
, "w");
187 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
188 /* Example of using user transform callback (we don't transform anything,
189 * but merely examine the row filters. We set this to 256 rather than
190 * 5 in case illegal filter values are present.)
192 static png_uint_32 filters_used
[256];
194 count_filters(png_structp png_ptr
, png_row_infop row_info
, png_bytep data
)
196 if (png_ptr
!= NULL
&& row_info
!= NULL
)
197 ++filters_used
[*(data
- 1)];
201 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
202 /* Example of using user transform callback (we don't transform anything,
203 * but merely count the zero samples)
206 static png_uint_32 zero_samples
;
209 count_zero_samples(png_structp png_ptr
, png_row_infop row_info
, png_bytep data
)
215 /* Contents of row_info:
216 * png_uint_32 width width of row
217 * png_uint_32 rowbytes number of bytes in row
218 * png_byte color_type color type of pixels
219 * png_byte bit_depth bit depth of samples
220 * png_byte channels number of channels (1-4)
221 * png_byte pixel_depth bits per pixel (depth*channels)
224 /* Counts the number of zero samples (or zero pixels if color_type is 3 */
226 if (row_info
->color_type
== 0 || row_info
->color_type
== 3)
229 png_uint_32 n
, nstop
;
231 for (n
= 0, nstop
=row_info
->width
; n
<nstop
; n
++)
233 if (row_info
->bit_depth
== 1)
235 if (((*dp
<< pos
++ ) & 0x80) == 0)
245 if (row_info
->bit_depth
== 2)
247 if (((*dp
<< (pos
+=2)) & 0xc0) == 0)
257 if (row_info
->bit_depth
== 4)
259 if (((*dp
<< (pos
+=4)) & 0xf0) == 0)
269 if (row_info
->bit_depth
== 8)
273 if (row_info
->bit_depth
== 16)
275 if ((*dp
| *(dp
+1)) == 0)
281 else /* Other color types */
283 png_uint_32 n
, nstop
;
285 int color_channels
= row_info
->channels
;
286 if (row_info
->color_type
> 3)color_channels
--;
288 for (n
= 0, nstop
=row_info
->width
; n
<nstop
; n
++)
290 for (channel
= 0; channel
< color_channels
; channel
++)
292 if (row_info
->bit_depth
== 8)
296 if (row_info
->bit_depth
== 16)
298 if ((*dp
| *(dp
+1)) == 0)
304 if (row_info
->color_type
> 3)
307 if (row_info
->bit_depth
== 16)
313 #endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */
315 #ifndef PNG_STDIO_SUPPORTED
316 /* START of code to validate stdio-free compilation */
317 /* These copies of the default read/write functions come from pngrio.c and
318 * pngwio.c. They allow "don't include stdio" testing of the library.
319 * This is the function that does the actual reading of data. If you are
320 * not reading from a standard C stream, you should create a replacement
321 * read_data function and use it at run time with png_set_read_fn(), rather
322 * than changing the library.
325 #ifdef PNG_IO_STATE_SUPPORTED
327 pngtest_check_io_state(png_structp png_ptr
, png_size_t data_length
,
330 pngtest_check_io_state(png_structp png_ptr
, png_size_t data_length
,
333 png_uint_32 io_state
= png_get_io_state(png_ptr
);
336 /* Check if the current operation (reading / writing) is as expected. */
337 if ((io_state
& PNG_IO_MASK_OP
) != io_op
)
338 png_error(png_ptr
, "Incorrect operation in I/O state");
340 /* Check if the buffer size specific to the current location
341 * (file signature / header / data / crc) is as expected.
343 switch (io_state
& PNG_IO_MASK_LOC
)
345 case PNG_IO_SIGNATURE
:
349 case PNG_IO_CHUNK_HDR
:
350 if (data_length
!= 8)
353 case PNG_IO_CHUNK_DATA
:
354 break; /* no restrictions here */
355 case PNG_IO_CHUNK_CRC
:
356 if (data_length
!= 4)
360 err
= 1; /* uninitialized */
363 png_error(png_ptr
, "Bad I/O state or buffer size");
368 pngtest_read_data(png_structp png_ptr
, png_bytep data
, png_size_t length
)
370 png_size_t check
= 0;
373 /* fread() returns 0 on error, so it is OK to store this in a png_size_t
374 * instead of an int, which is what fread() actually returns.
376 io_ptr
= png_get_io_ptr(png_ptr
);
379 check
= fread(data
, 1, length
, (png_FILE_p
)io_ptr
);
384 png_error(png_ptr
, "Read Error");
387 #ifdef PNG_IO_STATE_SUPPORTED
388 pngtest_check_io_state(png_ptr
, length
, PNG_IO_READING
);
392 #ifdef PNG_WRITE_FLUSH_SUPPORTED
394 pngtest_flush(png_structp png_ptr
)
396 /* Do nothing; fflush() is said to be just a waste of energy. */
397 PNG_UNUSED(png_ptr
) /* Stifle compiler warning */
401 /* This is the function that does the actual writing of data. If you are
402 * not writing to a standard C stream, you should create a replacement
403 * write_data function and use it at run time with png_set_write_fn(), rather
404 * than changing the library.
407 pngtest_write_data(png_structp png_ptr
, png_bytep data
, png_size_t length
)
411 check
= fwrite(data
, 1, length
, (png_FILE_p
)png_get_io_ptr(png_ptr
));
415 png_error(png_ptr
, "Write Error");
418 #ifdef PNG_IO_STATE_SUPPORTED
419 pngtest_check_io_state(png_ptr
, length
, PNG_IO_WRITING
);
422 #endif /* !PNG_STDIO_SUPPORTED */
424 /* This function is called when there is a warning, but the library thinks
425 * it can continue anyway. Replacement functions don't have to do anything
426 * here if you don't want to. In the default configuration, png_ptr is
427 * not used, but it is passed in case it may be useful.
431 PNG_CONST
char *file_name
;
432 } pngtest_error_parameters
;
435 pngtest_warning(png_structp png_ptr
, png_const_charp message
)
437 PNG_CONST
char *name
= "UNKNOWN (ERROR!)";
438 pngtest_error_parameters
*test
=
439 (pngtest_error_parameters
*)png_get_error_ptr(png_ptr
);
443 if (test
!= NULL
&& test
->file_name
!= NULL
)
444 name
= test
->file_name
;
446 fprintf(STDERR
, "%s: libpng warning: %s\n", name
, message
);
449 /* This is the default error handling function. Note that replacements for
450 * this function MUST NOT RETURN, or the program will likely crash. This
451 * function is used by default, or if the program supplies NULL for the
452 * error function pointer in png_set_error_fn().
455 pngtest_error(png_structp png_ptr
, png_const_charp message
)
459 pngtest_warning(png_ptr
, message
);
460 /* We can return because png_error calls the default handler, which is
461 * actually OK in this case.
465 /* END of code to validate stdio-free compilation */
467 /* START of code to validate memory allocation and deallocation */
468 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
470 /* Allocate memory. For reasonable files, size should never exceed
471 * 64K. However, zlib may allocate more then 64K if you don't tell
472 * it not to. See zconf.h and png.h for more information. zlib does
473 * need to allocate exactly 64K, so whatever you call here must
474 * have the ability to do that.
476 * This piece of code can be compiled to validate max 64K allocations
477 * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K.
479 typedef struct memory_information
481 png_alloc_size_t size
;
483 struct memory_information
*next
;
484 } memory_information
;
485 typedef memory_information
*memory_infop
;
487 static memory_infop pinformation
= NULL
;
488 static int current_allocation
= 0;
489 static int maximum_allocation
= 0;
490 static int total_allocation
= 0;
491 static int num_allocations
= 0;
493 png_voidp PNGCBAPI png_debug_malloc
PNGARG((png_structp png_ptr
,
494 png_alloc_size_t size
));
495 void PNGCBAPI png_debug_free
PNGARG((png_structp png_ptr
, png_voidp ptr
));
498 PNGCBAPI
png_debug_malloc(png_structp png_ptr
, png_alloc_size_t size
)
501 /* png_malloc has already tested for NULL; png_create_struct calls
502 * png_debug_malloc directly, with png_ptr == NULL which is OK
508 /* This calls the library allocator twice, once to get the requested
509 buffer and once to get a new free list entry. */
511 /* Disable malloc_fn and free_fn */
513 png_set_mem_fn(png_ptr
, NULL
, NULL
, NULL
);
514 pinfo
= (memory_infop
)png_malloc(png_ptr
,
517 current_allocation
+= size
;
518 total_allocation
+= size
;
521 if (current_allocation
> maximum_allocation
)
522 maximum_allocation
= current_allocation
;
524 pinfo
->pointer
= png_malloc(png_ptr
, size
);
525 /* Restore malloc_fn and free_fn */
527 png_set_mem_fn(png_ptr
,
528 NULL
, png_debug_malloc
, png_debug_free
);
530 if (size
!= 0 && pinfo
->pointer
== NULL
)
532 current_allocation
-= size
;
533 total_allocation
-= size
;
535 "out of memory in pngtest->png_debug_malloc");
538 pinfo
->next
= pinformation
;
539 pinformation
= pinfo
;
540 /* Make sure the caller isn't assuming zeroed memory. */
541 memset(pinfo
->pointer
, 0xdd, pinfo
->size
);
544 printf("png_malloc %lu bytes at %p\n", (unsigned long)size
,
547 return (png_voidp
)(pinfo
->pointer
);
551 /* Free a pointer. It is removed from the list at the same time. */
553 png_debug_free(png_structp png_ptr
, png_voidp ptr
)
556 fprintf(STDERR
, "NULL pointer to png_debug_free.\n");
560 #if 0 /* This happens all the time. */
561 fprintf(STDERR
, "WARNING: freeing NULL pointer\n");
566 /* Unlink the element from the list. */
568 memory_infop
*ppinfo
= &pinformation
;
572 memory_infop pinfo
= *ppinfo
;
574 if (pinfo
->pointer
== ptr
)
576 *ppinfo
= pinfo
->next
;
577 current_allocation
-= pinfo
->size
;
578 if (current_allocation
< 0)
579 fprintf(STDERR
, "Duplicate free of memory\n");
580 /* We must free the list element too, but first kill
581 the memory that is to be freed. */
582 memset(ptr
, 0x55, pinfo
->size
);
589 if (pinfo
->next
== NULL
)
591 fprintf(STDERR
, "Pointer %x not found\n", (unsigned int)ptr
);
595 ppinfo
= &pinfo
->next
;
599 /* Finally free the data. */
601 printf("Freeing %p\n", ptr
);
607 #endif /* PNG_USER_MEM_SUPPORTED && PNG_DEBUG */
608 /* END of code to test memory allocation/deallocation */
611 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
612 /* Demonstration of user chunk support of the sTER and vpAg chunks */
614 /* (sTER is a public chunk not yet known by libpng. vpAg is a private
615 chunk used in ImageMagick to store "virtual page" size). */
617 static struct user_chunk_data
619 png_const_infop info_ptr
;
620 png_uint_32 vpAg_width
, vpAg_height
;
627 /* Used for location and order; zero means nothing. */
628 #define have_sTER 0x01
629 #define have_vpAg 0x02
630 #define before_PLTE 0x10
631 #define before_IDAT 0x20
632 #define after_IDAT 0x40
635 init_callback_info(png_const_infop info_ptr
)
637 MEMZERO(user_chunk_data
);
638 user_chunk_data
.info_ptr
= info_ptr
;
642 set_location(png_structp png_ptr
, struct user_chunk_data
*data
, int what
)
646 if ((data
->location
[0] & what
) || (data
->location
[1] & what
))
647 return 0; /* already have one of these */
649 /* Find where we are (the code below zeros info_ptr to indicate that the
650 * chunks before the first IDAT have been read.)
652 if (data
->info_ptr
== NULL
) /* after IDAT */
653 location
= what
| after_IDAT
;
655 else if (png_get_valid(png_ptr
, data
->info_ptr
, PNG_INFO_PLTE
))
656 location
= what
| before_IDAT
;
659 location
= what
| before_PLTE
;
661 if (data
->location
[0] == 0)
662 data
->location
[0] = location
;
665 data
->location
[1] = location
;
667 return 1; /* handled */
670 static int PNGCBAPI
read_user_chunk_callback(png_struct
*png_ptr
,
671 png_unknown_chunkp chunk
)
673 struct user_chunk_data
*my_user_chunk_data
=
674 (struct user_chunk_data
*)png_get_user_chunk_ptr(png_ptr
);
676 if (my_user_chunk_data
== NULL
)
677 png_error(png_ptr
, "lost user chunk pointer");
679 /* Return one of the following:
680 * return (-n); chunk had an error
681 * return (0); did not recognize
682 * return (n); success
684 * The unknown chunk structure contains the chunk data:
689 * Note that libpng has already taken care of the CRC handling.
692 if (chunk
->name
[0] == 115 && chunk
->name
[1] == 84 && /* s T */
693 chunk
->name
[2] == 69 && chunk
->name
[3] == 82) /* E R */
695 /* Found sTER chunk */
696 if (chunk
->size
!= 1)
697 return (-1); /* Error return */
699 if (chunk
->data
[0] != 0 && chunk
->data
[0] != 1)
700 return (-1); /* Invalid mode */
702 if (set_location(png_ptr
, my_user_chunk_data
, have_sTER
))
704 my_user_chunk_data
->sTER_mode
=chunk
->data
[0];
709 return (0); /* duplicate sTER - give it to libpng */
712 if (chunk
->name
[0] != 118 || chunk
->name
[1] != 112 || /* v p */
713 chunk
->name
[2] != 65 || chunk
->name
[3] != 103) /* A g */
714 return (0); /* Did not recognize */
716 /* Found ImageMagick vpAg chunk */
718 if (chunk
->size
!= 9)
719 return (-1); /* Error return */
721 if (!set_location(png_ptr
, my_user_chunk_data
, have_vpAg
))
722 return (0); /* duplicate vpAg */
724 my_user_chunk_data
->vpAg_width
= png_get_uint_31(png_ptr
, chunk
->data
);
725 my_user_chunk_data
->vpAg_height
= png_get_uint_31(png_ptr
, chunk
->data
+ 4);
726 my_user_chunk_data
->vpAg_units
= chunk
->data
[8];
731 #ifdef PNG_WRITE_SUPPORTED
733 write_sTER_chunk(png_structp write_ptr
)
735 png_byte sTER
[5] = {115, 84, 69, 82, '\0'};
738 fprintf(STDERR
, "\n stereo mode = %d\n", user_chunk_data
.sTER_mode
);
740 png_write_chunk(write_ptr
, sTER
, &user_chunk_data
.sTER_mode
, 1);
744 write_vpAg_chunk(png_structp write_ptr
)
746 png_byte vpAg
[5] = {118, 112, 65, 103, '\0'};
748 png_byte vpag_chunk_data
[9];
751 fprintf(STDERR
, " vpAg = %lu x %lu, units = %d\n",
752 (unsigned long)user_chunk_data
.vpAg_width
,
753 (unsigned long)user_chunk_data
.vpAg_height
,
754 user_chunk_data
.vpAg_units
);
756 png_save_uint_32(vpag_chunk_data
, user_chunk_data
.vpAg_width
);
757 png_save_uint_32(vpag_chunk_data
+ 4, user_chunk_data
.vpAg_height
);
758 vpag_chunk_data
[8] = user_chunk_data
.vpAg_units
;
759 png_write_chunk(write_ptr
, vpAg
, vpag_chunk_data
, 9);
763 write_chunks(png_structp write_ptr
, int location
)
767 /* Notice that this preserves the original chunk order, however chunks
768 * intercepted by the callback will be written *after* chunks passed to
769 * libpng. This will actually reverse a pair of sTER chunks or a pair of
770 * vpAg chunks, resulting in an error later. This is not worth worrying
771 * about - the chunks should not be duplicated!
775 if (user_chunk_data
.location
[i
] == (location
| have_sTER
))
776 write_sTER_chunk(write_ptr
);
778 else if (user_chunk_data
.location
[i
] == (location
| have_vpAg
))
779 write_vpAg_chunk(write_ptr
);
782 #endif /* PNG_WRITE_SUPPORTED */
783 #else /* !PNG_READ_USER_CHUNKS_SUPPORTED */
784 # define write_chunks(pp,loc) ((void)0)
786 /* END of code to demonstrate user chunk support */
788 /* START of code to check that libpng has the required text support; this only
789 * checks for the write support because if read support is missing the chunk
790 * will simply not be reported back to pngtest.
792 #ifdef PNG_TEXT_SUPPORTED
794 pngtest_check_text_support(png_const_structp png_ptr
, png_textp text_ptr
,
799 switch (text_ptr
[--num_text
].compression
)
801 case PNG_TEXT_COMPRESSION_NONE
:
804 case PNG_TEXT_COMPRESSION_zTXt
:
805 # ifndef PNG_WRITE_zTXt_SUPPORTED
806 ++unsupported_chunks
;
810 case PNG_ITXT_COMPRESSION_NONE
:
811 case PNG_ITXT_COMPRESSION_zTXt
:
812 # ifndef PNG_WRITE_iTXt_SUPPORTED
813 ++unsupported_chunks
;
818 /* This is an error */
819 png_error(png_ptr
, "invalid text chunk compression field");
825 /* END of code to check that libpng has the required text support */
829 test_one_file(PNG_CONST
char *inname
, PNG_CONST
char *outname
)
831 static png_FILE_p fpin
;
832 static png_FILE_p fpout
; /* "static" prevents setjmp corruption */
833 pngtest_error_parameters error_parameters
;
834 png_structp read_ptr
;
835 png_infop read_info_ptr
, end_info_ptr
;
836 #ifdef PNG_WRITE_SUPPORTED
837 png_structp write_ptr
;
838 png_infop write_info_ptr
;
839 png_infop write_end_info_ptr
;
840 int interlace_preserved
= 1;
842 png_structp write_ptr
= NULL
;
843 png_infop write_info_ptr
= NULL
;
844 png_infop write_end_info_ptr
= NULL
;
848 png_uint_32 width
, height
;
849 int num_pass
= 1, pass
;
850 int bit_depth
, color_type
;
853 error_parameters
.file_name
= inname
;
855 if ((fpin
= fopen(inname
, "rb")) == NULL
)
857 fprintf(STDERR
, "Could not find input file %s\n", inname
);
861 if ((fpout
= fopen(outname
, "wb")) == NULL
)
863 fprintf(STDERR
, "Could not open output file %s\n", outname
);
868 pngtest_debug("Allocating read and write structures");
869 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
871 png_create_read_struct_2(PNG_LIBPNG_VER_STRING
, NULL
,
872 NULL
, NULL
, NULL
, png_debug_malloc
, png_debug_free
);
875 png_create_read_struct(PNG_LIBPNG_VER_STRING
, NULL
, NULL
, NULL
);
877 png_set_error_fn(read_ptr
, &error_parameters
, pngtest_error
,
880 #ifdef PNG_WRITE_SUPPORTED
881 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
883 png_create_write_struct_2(PNG_LIBPNG_VER_STRING
, NULL
,
884 NULL
, NULL
, NULL
, png_debug_malloc
, png_debug_free
);
887 png_create_write_struct(PNG_LIBPNG_VER_STRING
, NULL
, NULL
, NULL
);
889 png_set_error_fn(write_ptr
, &error_parameters
, pngtest_error
,
892 pngtest_debug("Allocating read_info, write_info and end_info structures");
893 read_info_ptr
= png_create_info_struct(read_ptr
);
894 end_info_ptr
= png_create_info_struct(read_ptr
);
895 #ifdef PNG_WRITE_SUPPORTED
896 write_info_ptr
= png_create_info_struct(write_ptr
);
897 write_end_info_ptr
= png_create_info_struct(write_ptr
);
900 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
901 init_callback_info(read_info_ptr
);
902 png_set_read_user_chunk_fn(read_ptr
, &user_chunk_data
,
903 read_user_chunk_callback
);
906 #ifdef PNG_SETJMP_SUPPORTED
907 pngtest_debug("Setting jmpbuf for read struct");
908 if (setjmp(png_jmpbuf(read_ptr
)))
910 fprintf(STDERR
, "%s -> %s: libpng read error\n", inname
, outname
);
911 png_free(read_ptr
, row_buf
);
913 png_destroy_read_struct(&read_ptr
, &read_info_ptr
, &end_info_ptr
);
914 #ifdef PNG_WRITE_SUPPORTED
915 png_destroy_info_struct(write_ptr
, &write_end_info_ptr
);
916 png_destroy_write_struct(&write_ptr
, &write_info_ptr
);
923 #ifdef PNG_WRITE_SUPPORTED
924 pngtest_debug("Setting jmpbuf for write struct");
926 if (setjmp(png_jmpbuf(write_ptr
)))
928 fprintf(STDERR
, "%s -> %s: libpng write error\n", inname
, outname
);
929 png_destroy_read_struct(&read_ptr
, &read_info_ptr
, &end_info_ptr
);
930 png_destroy_info_struct(write_ptr
, &write_end_info_ptr
);
931 #ifdef PNG_WRITE_SUPPORTED
932 png_destroy_write_struct(&write_ptr
, &write_info_ptr
);
943 /* Treat png_benign_error() as errors on read */
944 png_set_benign_errors(read_ptr
, 0);
946 #ifdef PNG_WRITE_SUPPORTED
947 /* Treat them as errors on write */
948 png_set_benign_errors(write_ptr
, 0);
951 /* if strict is not set, then app warnings and errors are treated as
952 * warnings in release builds, but not in unstable builds; this can be
953 * changed with '--relaxed'.
959 /* Allow application (pngtest) errors and warnings to pass */
960 png_set_benign_errors(read_ptr
, 1);
962 #ifdef PNG_WRITE_SUPPORTED
963 png_set_benign_errors(write_ptr
, 1);
967 pngtest_debug("Initializing input and output streams");
968 #ifdef PNG_STDIO_SUPPORTED
969 png_init_io(read_ptr
, fpin
);
970 # ifdef PNG_WRITE_SUPPORTED
971 png_init_io(write_ptr
, fpout
);
974 png_set_read_fn(read_ptr
, (png_voidp
)fpin
, pngtest_read_data
);
975 # ifdef PNG_WRITE_SUPPORTED
976 png_set_write_fn(write_ptr
, (png_voidp
)fpout
, pngtest_write_data
,
977 # ifdef PNG_WRITE_FLUSH_SUPPORTED
985 if (status_dots_requested
== 1)
987 #ifdef PNG_WRITE_SUPPORTED
988 png_set_write_status_fn(write_ptr
, write_row_callback
);
990 png_set_read_status_fn(read_ptr
, read_row_callback
);
995 #ifdef PNG_WRITE_SUPPORTED
996 png_set_write_status_fn(write_ptr
, NULL
);
998 png_set_read_status_fn(read_ptr
, NULL
);
1001 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1005 for (i
= 0; i
<256; i
++)
1006 filters_used
[i
] = 0;
1008 png_set_read_user_transform_fn(read_ptr
, count_filters
);
1011 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1013 png_set_write_user_transform_fn(write_ptr
, count_zero_samples
);
1016 #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
1017 /* Preserve all the unknown chunks, if possible. If this is disabled then,
1018 * even if the png_{get,set}_unknown_chunks stuff is enabled, we can't use
1019 * libpng to *save* the unknown chunks on read (because we can't switch the
1022 * Notice that if SET_UNKNOWN_CHUNKS is *not* supported read will discard all
1023 * unknown chunks and write will write them all.
1025 #ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
1026 png_set_keep_unknown_chunks(read_ptr
, PNG_HANDLE_CHUNK_ALWAYS
,
1029 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1030 png_set_keep_unknown_chunks(write_ptr
, PNG_HANDLE_CHUNK_ALWAYS
,
1035 pngtest_debug("Reading info struct");
1036 png_read_info(read_ptr
, read_info_ptr
);
1038 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1039 /* This is a bit of a hack; there is no obvious way in the callback function
1040 * to determine that the chunks before the first IDAT have been read, so
1041 * remove the info_ptr (which is only used to determine position relative to
1042 * PLTE) here to indicate that we are after the IDAT.
1044 user_chunk_data
.info_ptr
= NULL
;
1047 pngtest_debug("Transferring info struct");
1049 int interlace_type
, compression_type
, filter_type
;
1051 if (png_get_IHDR(read_ptr
, read_info_ptr
, &width
, &height
, &bit_depth
,
1052 &color_type
, &interlace_type
, &compression_type
, &filter_type
))
1054 png_set_IHDR(write_ptr
, write_info_ptr
, width
, height
, bit_depth
,
1055 color_type
, interlace_type
, compression_type
, filter_type
);
1056 #ifndef PNG_READ_INTERLACING_SUPPORTED
1057 /* num_pass will not be set below, set it here if the image is
1058 * interlaced: what happens is that write interlacing is *not* turned
1059 * on an the partial interlaced rows are written directly.
1061 switch (interlace_type
)
1063 case PNG_INTERLACE_NONE
:
1067 case PNG_INTERLACE_ADAM7
:
1072 png_error(read_ptr
, "invalid interlace type");
1078 #ifdef PNG_FIXED_POINT_SUPPORTED
1079 #ifdef PNG_cHRM_SUPPORTED
1081 png_fixed_point white_x
, white_y
, red_x
, red_y
, green_x
, green_y
, blue_x
,
1084 if (png_get_cHRM_fixed(read_ptr
, read_info_ptr
, &white_x
, &white_y
,
1085 &red_x
, &red_y
, &green_x
, &green_y
, &blue_x
, &blue_y
))
1087 png_set_cHRM_fixed(write_ptr
, write_info_ptr
, white_x
, white_y
, red_x
,
1088 red_y
, green_x
, green_y
, blue_x
, blue_y
);
1092 #ifdef PNG_gAMA_SUPPORTED
1094 png_fixed_point gamma
;
1096 if (png_get_gAMA_fixed(read_ptr
, read_info_ptr
, &gamma
))
1097 png_set_gAMA_fixed(write_ptr
, write_info_ptr
, gamma
);
1100 #else /* Use floating point versions */
1101 #ifdef PNG_FLOATING_POINT_SUPPORTED
1102 #ifdef PNG_cHRM_SUPPORTED
1104 double white_x
, white_y
, red_x
, red_y
, green_x
, green_y
, blue_x
,
1107 if (png_get_cHRM(read_ptr
, read_info_ptr
, &white_x
, &white_y
, &red_x
,
1108 &red_y
, &green_x
, &green_y
, &blue_x
, &blue_y
))
1110 png_set_cHRM(write_ptr
, write_info_ptr
, white_x
, white_y
, red_x
,
1111 red_y
, green_x
, green_y
, blue_x
, blue_y
);
1115 #ifdef PNG_gAMA_SUPPORTED
1119 if (png_get_gAMA(read_ptr
, read_info_ptr
, &gamma
))
1120 png_set_gAMA(write_ptr
, write_info_ptr
, gamma
);
1123 #endif /* Floating point */
1124 #endif /* Fixed point */
1125 #ifdef PNG_iCCP_SUPPORTED
1129 png_uint_32 proflen
;
1130 int compression_type
;
1132 if (png_get_iCCP(read_ptr
, read_info_ptr
, &name
, &compression_type
,
1133 &profile
, &proflen
))
1135 png_set_iCCP(write_ptr
, write_info_ptr
, name
, compression_type
,
1140 #ifdef PNG_sRGB_SUPPORTED
1144 if (png_get_sRGB(read_ptr
, read_info_ptr
, &intent
))
1145 png_set_sRGB(write_ptr
, write_info_ptr
, intent
);
1152 if (png_get_PLTE(read_ptr
, read_info_ptr
, &palette
, &num_palette
))
1153 png_set_PLTE(write_ptr
, write_info_ptr
, palette
, num_palette
);
1155 #ifdef PNG_bKGD_SUPPORTED
1157 png_color_16p background
;
1159 if (png_get_bKGD(read_ptr
, read_info_ptr
, &background
))
1161 png_set_bKGD(write_ptr
, write_info_ptr
, background
);
1165 #ifdef PNG_hIST_SUPPORTED
1169 if (png_get_hIST(read_ptr
, read_info_ptr
, &hist
))
1170 png_set_hIST(write_ptr
, write_info_ptr
, hist
);
1173 #ifdef PNG_oFFs_SUPPORTED
1175 png_int_32 offset_x
, offset_y
;
1178 if (png_get_oFFs(read_ptr
, read_info_ptr
, &offset_x
, &offset_y
,
1181 png_set_oFFs(write_ptr
, write_info_ptr
, offset_x
, offset_y
, unit_type
);
1185 #ifdef PNG_pCAL_SUPPORTED
1187 png_charp purpose
, units
;
1192 if (png_get_pCAL(read_ptr
, read_info_ptr
, &purpose
, &X0
, &X1
, &type
,
1193 &nparams
, &units
, ¶ms
))
1195 png_set_pCAL(write_ptr
, write_info_ptr
, purpose
, X0
, X1
, type
,
1196 nparams
, units
, params
);
1200 #ifdef PNG_pHYs_SUPPORTED
1202 png_uint_32 res_x
, res_y
;
1205 if (png_get_pHYs(read_ptr
, read_info_ptr
, &res_x
, &res_y
, &unit_type
))
1206 png_set_pHYs(write_ptr
, write_info_ptr
, res_x
, res_y
, unit_type
);
1209 #ifdef PNG_sBIT_SUPPORTED
1211 png_color_8p sig_bit
;
1213 if (png_get_sBIT(read_ptr
, read_info_ptr
, &sig_bit
))
1214 png_set_sBIT(write_ptr
, write_info_ptr
, sig_bit
);
1217 #ifdef PNG_sCAL_SUPPORTED
1218 #if defined(PNG_FLOATING_POINT_SUPPORTED) && \
1219 defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
1222 double scal_width
, scal_height
;
1224 if (png_get_sCAL(read_ptr
, read_info_ptr
, &unit
, &scal_width
,
1227 png_set_sCAL(write_ptr
, write_info_ptr
, unit
, scal_width
, scal_height
);
1231 #ifdef PNG_FIXED_POINT_SUPPORTED
1234 png_charp scal_width
, scal_height
;
1236 if (png_get_sCAL_s(read_ptr
, read_info_ptr
, &unit
, &scal_width
,
1239 png_set_sCAL_s(write_ptr
, write_info_ptr
, unit
, scal_width
,
1246 #ifdef PNG_TEXT_SUPPORTED
1251 if (png_get_text(read_ptr
, read_info_ptr
, &text_ptr
, &num_text
) > 0)
1253 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text
);
1255 pngtest_check_text_support(read_ptr
, text_ptr
, num_text
);
1262 for (i
=0; i
<num_text
; i
++)
1264 printf(" Text compression[%d]=%d\n",
1265 i
, text_ptr
[i
].compression
);
1269 png_set_text(write_ptr
, write_info_ptr
, text_ptr
, num_text
);
1273 #ifdef PNG_tIME_SUPPORTED
1277 if (png_get_tIME(read_ptr
, read_info_ptr
, &mod_time
))
1279 png_set_tIME(write_ptr
, write_info_ptr
, mod_time
);
1280 #ifdef PNG_TIME_RFC1123_SUPPORTED
1281 if (png_convert_to_rfc1123_buffer(tIME_string
, mod_time
))
1282 tIME_string
[(sizeof tIME_string
) - 1] = '\0';
1286 strncpy(tIME_string
, "*** invalid time ***", (sizeof tIME_string
));
1287 tIME_string
[(sizeof tIME_string
) - 1] = '\0';
1290 tIME_chunk_present
++;
1291 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1295 #ifdef PNG_tRNS_SUPPORTED
1297 png_bytep trans_alpha
;
1299 png_color_16p trans_color
;
1301 if (png_get_tRNS(read_ptr
, read_info_ptr
, &trans_alpha
, &num_trans
,
1304 int sample_max
= (1 << bit_depth
);
1305 /* libpng doesn't reject a tRNS chunk with out-of-range samples */
1306 if (!((color_type
== PNG_COLOR_TYPE_GRAY
&&
1307 (int)trans_color
->gray
> sample_max
) ||
1308 (color_type
== PNG_COLOR_TYPE_RGB
&&
1309 ((int)trans_color
->red
> sample_max
||
1310 (int)trans_color
->green
> sample_max
||
1311 (int)trans_color
->blue
> sample_max
))))
1312 png_set_tRNS(write_ptr
, write_info_ptr
, trans_alpha
, num_trans
,
1317 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1319 png_unknown_chunkp unknowns
;
1320 int num_unknowns
= png_get_unknown_chunks(read_ptr
, read_info_ptr
,
1325 png_set_unknown_chunks(write_ptr
, write_info_ptr
, unknowns
,
1327 #if PNG_LIBPNG_VER < 10600
1328 /* Copy the locations from the read_info_ptr. The automatically
1329 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1330 * because they are reset from the write pointer (removed in 1.6.0).
1334 for (i
= 0; i
< num_unknowns
; i
++)
1335 png_set_unknown_chunk_location(write_ptr
, write_info_ptr
, i
,
1336 unknowns
[i
].location
);
1343 #ifdef PNG_WRITE_SUPPORTED
1344 pngtest_debug("Writing info struct");
1346 /* Write the info in two steps so that if we write the 'unknown' chunks here
1347 * they go to the correct place.
1349 png_write_info_before_PLTE(write_ptr
, write_info_ptr
);
1351 write_chunks(write_ptr
, before_PLTE
); /* before PLTE */
1353 png_write_info(write_ptr
, write_info_ptr
);
1355 write_chunks(write_ptr
, before_IDAT
); /* after PLTE */
1358 #ifdef SINGLE_ROWBUF_ALLOC
1359 pngtest_debug("Allocating row buffer...");
1360 row_buf
= (png_bytep
)png_malloc(read_ptr
,
1361 png_get_rowbytes(read_ptr
, read_info_ptr
));
1363 pngtest_debug1("\t0x%08lx", (unsigned long)row_buf
);
1364 #endif /* SINGLE_ROWBUF_ALLOC */
1365 pngtest_debug("Writing row data");
1367 #ifdef PNG_READ_INTERLACING_SUPPORTED
1368 num_pass
= png_set_interlace_handling(read_ptr
);
1369 if (png_set_interlace_handling(write_ptr
) != num_pass
)
1370 png_error(write_ptr
, "png_set_interlace_handling: inconsistent num_pass");
1373 #ifdef PNGTEST_TIMING
1374 t_stop
= (float)clock();
1375 t_misc
+= (t_stop
- t_start
);
1378 for (pass
= 0; pass
< num_pass
; pass
++)
1380 pngtest_debug1("Writing row data for pass %d", pass
);
1381 for (y
= 0; y
< height
; y
++)
1383 #ifndef SINGLE_ROWBUF_ALLOC
1384 pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass
, y
);
1385 row_buf
= (png_bytep
)png_malloc(read_ptr
,
1386 png_get_rowbytes(read_ptr
, read_info_ptr
));
1388 pngtest_debug2("\t0x%08lx (%u bytes)", (unsigned long)row_buf
,
1389 png_get_rowbytes(read_ptr
, read_info_ptr
));
1391 #endif /* !SINGLE_ROWBUF_ALLOC */
1392 png_read_rows(read_ptr
, (png_bytepp
)&row_buf
, NULL
, 1);
1394 #ifdef PNG_WRITE_SUPPORTED
1395 #ifdef PNGTEST_TIMING
1396 t_stop
= (float)clock();
1397 t_decode
+= (t_stop
- t_start
);
1400 png_write_rows(write_ptr
, (png_bytepp
)&row_buf
, 1);
1401 #ifdef PNGTEST_TIMING
1402 t_stop
= (float)clock();
1403 t_encode
+= (t_stop
- t_start
);
1406 #endif /* PNG_WRITE_SUPPORTED */
1408 #ifndef SINGLE_ROWBUF_ALLOC
1409 pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass
, y
);
1410 png_free(read_ptr
, row_buf
);
1412 #endif /* !SINGLE_ROWBUF_ALLOC */
1416 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
1417 # ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1418 png_free_data(read_ptr
, read_info_ptr
, PNG_FREE_UNKN
, -1);
1420 # ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1421 png_free_data(write_ptr
, write_info_ptr
, PNG_FREE_UNKN
, -1);
1425 pngtest_debug("Reading and writing end_info data");
1427 png_read_end(read_ptr
, end_info_ptr
);
1428 #ifdef PNG_TEXT_SUPPORTED
1433 if (png_get_text(read_ptr
, end_info_ptr
, &text_ptr
, &num_text
) > 0)
1435 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text
);
1437 pngtest_check_text_support(read_ptr
, text_ptr
, num_text
);
1444 for (i
=0; i
<num_text
; i
++)
1446 printf(" Text compression[%d]=%d\n",
1447 i
, text_ptr
[i
].compression
);
1451 png_set_text(write_ptr
, write_end_info_ptr
, text_ptr
, num_text
);
1455 #ifdef PNG_tIME_SUPPORTED
1459 if (png_get_tIME(read_ptr
, end_info_ptr
, &mod_time
))
1461 png_set_tIME(write_ptr
, write_end_info_ptr
, mod_time
);
1462 #ifdef PNG_TIME_RFC1123_SUPPORTED
1463 if (png_convert_to_rfc1123_buffer(tIME_string
, mod_time
))
1464 tIME_string
[(sizeof tIME_string
) - 1] = '\0';
1468 strncpy(tIME_string
, "*** invalid time ***", sizeof tIME_string
);
1469 tIME_string
[(sizeof tIME_string
)-1] = '\0';
1472 tIME_chunk_present
++;
1473 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1477 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1479 png_unknown_chunkp unknowns
;
1480 int num_unknowns
= png_get_unknown_chunks(read_ptr
, end_info_ptr
,
1485 png_set_unknown_chunks(write_ptr
, write_end_info_ptr
, unknowns
,
1487 #if PNG_LIBPNG_VER < 10600
1488 /* Copy the locations from the read_info_ptr. The automatically
1489 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1490 * because they are reset from the write pointer (removed in 1.6.0).
1494 for (i
= 0; i
< num_unknowns
; i
++)
1495 png_set_unknown_chunk_location(write_ptr
, write_end_info_ptr
, i
,
1496 unknowns
[i
].location
);
1503 #ifdef PNG_WRITE_SUPPORTED
1504 #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
1505 /* Normally one would use Z_DEFAULT_STRATEGY for text compression.
1506 * This is here just to make pngtest replicate the results from libpng
1507 * versions prior to 1.5.4, and to test this new API.
1509 png_set_text_compression_strategy(write_ptr
, Z_FILTERED
);
1512 /* When the unknown vpAg/sTER chunks are written by pngtest the only way to
1513 * do it is to write them *before* calling png_write_end. When unknown
1514 * chunks are written by libpng, however, they are written just before IEND.
1515 * There seems to be no way round this, however vpAg/sTER are not expected
1518 write_chunks(write_ptr
, after_IDAT
);
1520 png_write_end(write_ptr
, write_end_info_ptr
);
1523 #ifdef PNG_EASY_ACCESS_SUPPORTED
1526 png_uint_32 iwidth
, iheight
;
1527 iwidth
= png_get_image_width(write_ptr
, write_info_ptr
);
1528 iheight
= png_get_image_height(write_ptr
, write_info_ptr
);
1529 fprintf(STDERR
, "\n Image width = %lu, height = %lu\n",
1530 (unsigned long)iwidth
, (unsigned long)iheight
);
1534 pngtest_debug("Destroying data structs");
1535 #ifdef SINGLE_ROWBUF_ALLOC
1536 pngtest_debug("destroying row_buf for read_ptr");
1537 png_free(read_ptr
, row_buf
);
1539 #endif /* SINGLE_ROWBUF_ALLOC */
1540 pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr");
1541 png_destroy_read_struct(&read_ptr
, &read_info_ptr
, &end_info_ptr
);
1542 #ifdef PNG_WRITE_SUPPORTED
1543 pngtest_debug("destroying write_end_info_ptr");
1544 png_destroy_info_struct(write_ptr
, &write_end_info_ptr
);
1545 pngtest_debug("destroying write_ptr, write_info_ptr");
1546 png_destroy_write_struct(&write_ptr
, &write_info_ptr
);
1548 pngtest_debug("Destruction complete.");
1553 /* Summarize any warnings or errors and in 'strict' mode fail the test.
1554 * Unsupported chunks can result in warnings, in that case ignore the strict
1555 * setting, otherwise fail the test on warnings as well as errors.
1557 if (error_count
> 0)
1559 /* We don't really expect to get here because of the setjmp handling
1560 * above, but this is safe.
1562 fprintf(STDERR
, "\n %s: %d libpng errors found (%d warnings)",
1563 inname
, error_count
, warning_count
);
1569 # ifdef PNG_WRITE_SUPPORTED
1570 /* If there we no write support nothing was written! */
1571 else if (unsupported_chunks
> 0)
1573 fprintf(STDERR
, "\n %s: unsupported chunks (%d)%s",
1574 inname
, unsupported_chunks
, strict ?
": IGNORED --strict!" : "");
1578 else if (warning_count
> 0)
1580 fprintf(STDERR
, "\n %s: %d libpng warnings found",
1581 inname
, warning_count
);
1587 pngtest_debug("Opening files for comparison");
1588 if ((fpin
= fopen(inname
, "rb")) == NULL
)
1590 fprintf(STDERR
, "Could not find file %s\n", inname
);
1594 if ((fpout
= fopen(outname
, "rb")) == NULL
)
1596 fprintf(STDERR
, "Could not find file %s\n", outname
);
1601 #ifdef PNG_WRITE_SUPPORTED /* else nothing was written */
1602 if (interlace_preserved
) /* else the files will be changed */
1606 static int wrote_question
= 0;
1607 png_size_t num_in
, num_out
;
1608 char inbuf
[256], outbuf
[256];
1610 num_in
= fread(inbuf
, 1, sizeof inbuf
, fpin
);
1611 num_out
= fread(outbuf
, 1, sizeof outbuf
, fpout
);
1613 if (num_in
!= num_out
)
1615 fprintf(STDERR
, "\nFiles %s and %s are of a different size\n",
1618 if (wrote_question
== 0 && unsupported_chunks
== 0)
1621 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1622 inname
, PNG_ZBUF_SIZE
);
1624 "\n filtering heuristic (libpng default), compression");
1626 " level (zlib default),\n and zlib version (%s)?\n\n",
1634 if (strict
!= 0 && unsupported_chunks
== 0)
1644 if (memcmp(inbuf
, outbuf
, num_in
))
1646 fprintf(STDERR
, "\nFiles %s and %s are different\n", inname
,
1649 if (wrote_question
== 0 && unsupported_chunks
== 0)
1652 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1653 inname
, PNG_ZBUF_SIZE
);
1655 "\n filtering heuristic (libpng default), compression");
1657 " level (zlib default),\n and zlib version (%s)?\n\n",
1665 /* NOTE: the unsupported_chunks escape is permitted here because
1666 * unsupported text chunk compression will result in the compression
1667 * mode being changed (to NONE) yet, in the test case, the result
1668 * can be exactly the same size!
1670 if (strict
!= 0 && unsupported_chunks
== 0)
1678 #endif /* PNG_WRITE_SUPPORTED */
1686 /* Input and output filenames */
1688 static PNG_CONST
char *inname
= "pngtest/png";
1689 static PNG_CONST
char *outname
= "pngout/png";
1691 static PNG_CONST
char *inname
= "pngtest.png";
1692 static PNG_CONST
char *outname
= "pngout.png";
1696 main(int argc
, char *argv
[])
1701 fprintf(STDERR
, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING
);
1702 fprintf(STDERR
, " with zlib version %s\n", ZLIB_VERSION
);
1703 fprintf(STDERR
, "%s", png_get_copyright(NULL
));
1704 /* Show the version of libpng used in building the library */
1705 fprintf(STDERR
, " library (%lu):%s",
1706 (unsigned long)png_access_version_number(),
1707 png_get_header_version(NULL
));
1709 /* Show the version of libpng used in building the application */
1710 fprintf(STDERR
, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER
,
1711 PNG_HEADER_VERSION_STRING
);
1713 /* Do some consistency checking on the memory allocation settings, I'm
1714 * not sure this matters, but it is nice to know, the first of these
1715 * tests should be impossible because of the way the macros are set
1718 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1719 fprintf(STDERR
, " NOTE: Zlib compiled for max 64k, libpng not\n");
1721 /* I think the following can happen. */
1722 #if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1723 fprintf(STDERR
, " NOTE: libpng compiled for max 64k, zlib not\n");
1726 if (strcmp(png_libpng_ver
, PNG_LIBPNG_VER_STRING
))
1729 "Warning: versions are different between png.h and png.c\n");
1730 fprintf(STDERR
, " png.h version: %s\n", PNG_LIBPNG_VER_STRING
);
1731 fprintf(STDERR
, " png.c version: %s\n\n", png_libpng_ver
);
1737 if (strcmp(argv
[1], "-m") == 0)
1740 status_dots_requested
= 0;
1743 else if (strcmp(argv
[1], "-mv") == 0 ||
1744 strcmp(argv
[1], "-vm") == 0 )
1748 status_dots_requested
= 1;
1751 else if (strcmp(argv
[1], "-v") == 0)
1754 status_dots_requested
= 1;
1758 else if (strcmp(argv
[1], "--strict") == 0)
1760 status_dots_requested
= 0;
1767 else if (strcmp(argv
[1], "--relaxed") == 0)
1769 status_dots_requested
= 0;
1779 status_dots_requested
= 0;
1783 if (!multiple
&& argc
== 3 + verbose
)
1784 outname
= argv
[2 + verbose
];
1786 if ((!multiple
&& argc
> 3 + verbose
) || (multiple
&& argc
< 2))
1789 "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
1792 " reads/writes one PNG file (without -m) or multiple files (-m)\n");
1794 " with -m %s is used as a temporary file\n", outname
);
1801 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1802 int allocation_now
= current_allocation
;
1804 for (i
=2; i
<argc
; ++i
)
1807 fprintf(STDERR
, "\n Testing %s:", argv
[i
]);
1808 kerror
= test_one_file(argv
[i
], outname
);
1811 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1814 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1815 fprintf(STDERR
, "\n PASS (%lu zero samples)\n",
1816 (unsigned long)zero_samples
);
1818 fprintf(STDERR
, " PASS\n");
1820 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1821 for (k
= 0; k
<256; k
++)
1822 if (filters_used
[k
])
1823 fprintf(STDERR
, " Filter %d was used %lu times\n",
1824 k
, (unsigned long)filters_used
[k
]);
1826 #ifdef PNG_TIME_RFC1123_SUPPORTED
1827 if (tIME_chunk_present
!= 0)
1828 fprintf(STDERR
, " tIME = %s\n", tIME_string
);
1830 tIME_chunk_present
= 0;
1831 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1836 fprintf(STDERR
, " FAIL\n");
1839 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1840 if (allocation_now
!= current_allocation
)
1841 fprintf(STDERR
, "MEMORY ERROR: %d bytes lost\n",
1842 current_allocation
- allocation_now
);
1844 if (current_allocation
!= 0)
1846 memory_infop pinfo
= pinformation
;
1848 fprintf(STDERR
, "MEMORY ERROR: %d bytes still allocated\n",
1849 current_allocation
);
1851 while (pinfo
!= NULL
)
1853 fprintf(STDERR
, " %lu bytes at %x\n",
1854 (unsigned long)pinfo
->size
,
1855 (unsigned int)pinfo
->pointer
);
1856 pinfo
= pinfo
->next
;
1861 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1862 fprintf(STDERR
, " Current memory allocation: %10d bytes\n",
1863 current_allocation
);
1864 fprintf(STDERR
, " Maximum memory allocation: %10d bytes\n",
1865 maximum_allocation
);
1866 fprintf(STDERR
, " Total memory allocation: %10d bytes\n",
1868 fprintf(STDERR
, " Number of allocations: %10d\n",
1876 for (i
= 0; i
<3; ++i
)
1879 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1880 int allocation_now
= current_allocation
;
1883 status_dots_requested
= 1;
1885 else if (verbose
== 0)
1886 status_dots_requested
= 0;
1888 if (i
== 0 || verbose
== 1 || ierror
!= 0)
1889 fprintf(STDERR
, "\n Testing %s:", inname
);
1891 kerror
= test_one_file(inname
, outname
);
1895 if (verbose
== 1 || i
== 2)
1897 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1900 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1901 fprintf(STDERR
, "\n PASS (%lu zero samples)\n",
1902 (unsigned long)zero_samples
);
1904 fprintf(STDERR
, " PASS\n");
1906 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1907 for (k
= 0; k
<256; k
++)
1908 if (filters_used
[k
])
1909 fprintf(STDERR
, " Filter %d was used %lu times\n",
1910 k
, (unsigned long)filters_used
[k
]);
1912 #ifdef PNG_TIME_RFC1123_SUPPORTED
1913 if (tIME_chunk_present
!= 0)
1914 fprintf(STDERR
, " tIME = %s\n", tIME_string
);
1915 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1921 if (verbose
== 0 && i
!= 2)
1922 fprintf(STDERR
, "\n Testing %s:", inname
);
1924 fprintf(STDERR
, " FAIL\n");
1927 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1928 if (allocation_now
!= current_allocation
)
1929 fprintf(STDERR
, "MEMORY ERROR: %d bytes lost\n",
1930 current_allocation
- allocation_now
);
1932 if (current_allocation
!= 0)
1934 memory_infop pinfo
= pinformation
;
1936 fprintf(STDERR
, "MEMORY ERROR: %d bytes still allocated\n",
1937 current_allocation
);
1939 while (pinfo
!= NULL
)
1941 fprintf(STDERR
, " %lu bytes at %x\n",
1942 (unsigned long)pinfo
->size
, (unsigned int)pinfo
->pointer
);
1943 pinfo
= pinfo
->next
;
1948 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1949 fprintf(STDERR
, " Current memory allocation: %10d bytes\n",
1950 current_allocation
);
1951 fprintf(STDERR
, " Maximum memory allocation: %10d bytes\n",
1952 maximum_allocation
);
1953 fprintf(STDERR
, " Total memory allocation: %10d bytes\n",
1955 fprintf(STDERR
, " Number of allocations: %10d\n",
1960 #ifdef PNGTEST_TIMING
1961 t_stop
= (float)clock();
1962 t_misc
+= (t_stop
- t_start
);
1964 fprintf(STDERR
, " CPU time used = %.3f seconds",
1965 (t_misc
+t_decode
+t_encode
)/(float)CLOCKS_PER_SEC
);
1966 fprintf(STDERR
, " (decoding %.3f,\n",
1967 t_decode
/(float)CLOCKS_PER_SEC
);
1968 fprintf(STDERR
, " encoding %.3f ,",
1969 t_encode
/(float)CLOCKS_PER_SEC
);
1970 fprintf(STDERR
, " other %.3f seconds)\n\n",
1971 t_misc
/(float)CLOCKS_PER_SEC
);
1975 fprintf(STDERR
, " libpng passes test\n");
1978 fprintf(STDERR
, " libpng FAILS test\n");
1980 return (int)(ierror
!= 0);
1987 " test ignored because libpng was not built with read support\n");
1988 /* And skip this test */
1989 return PNG_LIBPNG_VER
< 10600 ?
0 : 77;
1993 /* Generate a compiler error if there is an old png.h in the search path. */
1994 typedef png_libpng_version_1_6_9 Your_png_h_is_not_version_1_6_9
;