2 /* pngtest.c - a simple test program to test libpng
4 * Last changed in libpng 1.5.25 [December 3, 2015]
5 * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
6 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
7 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
9 * This code is released under the libpng license.
10 * For conditions of distribution and use, see the disclaimer
11 * and license in png.h
13 * This program reads in a PNG image, writes it out again, and then
14 * compares the two files. If the files are identical, this shows that
15 * the basic chunk handling, filtering, and (de)compression code is working
16 * properly. It does not currently test all of the transforms, although
19 * The program will report "FAIL" in certain legitimate cases:
20 * 1) when the compression level or filter selection method is changed.
21 * 2) when the maximum IDAT size (PNG_ZBUF_SIZE in pngconf.h) is not 8192.
22 * 3) unknown unsafe-to-copy ancillary chunks or unknown critical chunks
23 * exist in the input file.
24 * 4) others not listed here...
25 * In these cases, it is best to check with another tool such as "pngcheck"
26 * to see what the differences between the two files are.
28 * If a filename is given on the command-line, then this file is used
29 * for the input, rather than the default "pngtest.png". This allows
30 * testing a wide variety of files easily. You can also test a number
31 * of files at once by typing "pngtest -m file1.png file2.png ..."
34 #define _POSIX_SOURCE 1
40 /* Defined so I can write to a file on gui/windowing platforms */
41 /* #define STDERR stderr */
42 #define STDERR stdout /* For DOS */
46 /* 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_sPLT_SUPPORTED &&\
65 defined PNG_READ_tEXt_SUPPORTED &&\
66 defined PNG_READ_tIME_SUPPORTED &&\
67 defined PNG_READ_zTXt_SUPPORTED &&\
68 (defined PNG_WRITE_INTERLACING_SUPPORTED || PNG_LIBPNG_VER >= 10700)
70 #ifdef PNG_ZLIB_HEADER
71 # include PNG_ZLIB_HEADER /* defined by pnglibconf.h from 1.7 */
76 /* Copied from pngpriv.h but only used in error messages below. */
78 # define PNG_ZBUF_SIZE 8192
80 #define FCLOSE(file) fclose(file)
82 #ifndef PNG_STDIO_SUPPORTED
83 typedef FILE * png_FILE_p
;
86 /* Makes pngtest verbose so we can find problems. */
92 # define pngtest_debug(m) ((void)fprintf(stderr, m "\n"))
93 # define pngtest_debug1(m,p1) ((void)fprintf(stderr, m "\n", p1))
94 # define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2))
96 # define pngtest_debug(m) ((void)0)
97 # define pngtest_debug1(m,p1) ((void)0)
98 # define pngtest_debug2(m,p1,p2) ((void)0)
102 # define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */
106 # define PNG_UNUSED(param) (void)param;
109 /* Turn on CPU timing
110 #define PNGTEST_TIMING
113 #ifndef PNG_FLOATING_POINT_SUPPORTED
114 #undef PNGTEST_TIMING
117 #ifdef PNGTEST_TIMING
118 static float t_start
, t_stop
, t_decode
, t_encode
, t_misc
;
122 #ifdef PNG_TIME_RFC1123_SUPPORTED
123 #define PNG_tIME_STRING_LENGTH 29
124 static int tIME_chunk_present
= 0;
125 static char tIME_string
[PNG_tIME_STRING_LENGTH
] = "tIME chunk is not present";
127 #if PNG_LIBPNG_VER < 10619
128 #define png_convert_to_rfc1123_buffer(ts, t) tIME_to_str(read_ptr, ts, t)
131 tIME_to_str(png_structp png_ptr
, png_charp ts
, png_const_timep t
)
133 png_const_charp str
= png_convert_to_rfc1123(png_ptr
, t
);
141 #endif /* older libpng */
144 static int verbose
= 0;
145 static int strict
= 0;
146 static int relaxed
= 0;
147 static int unsupported_chunks
= 0; /* chunk unsupported by libpng in input */
148 static int error_count
= 0; /* count calls to png_error */
149 static int warning_count
= 0; /* count calls to png_warning */
151 /* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
153 # define png_jmpbuf(png_ptr) png_ptr->jmpbuf
156 /* Defines for unknown chunk handling if required. */
157 #ifndef PNG_HANDLE_CHUNK_ALWAYS
158 # define PNG_HANDLE_CHUNK_ALWAYS 3
160 #ifndef PNG_HANDLE_CHUNK_IF_SAFE
161 # define PNG_HANDLE_CHUNK_IF_SAFE 2
164 /* Utility to save typing/errors, the argument must be a name */
165 #define MEMZERO(var) ((void)memset(&var, 0, sizeof var))
167 /* Example of using row callbacks to make a simple progress meter */
168 static int status_pass
= 1;
169 static int status_dots_requested
= 0;
170 static int status_dots
= 1;
173 read_row_callback(png_structp png_ptr
, png_uint_32 row_number
, int pass
)
175 if (png_ptr
== NULL
|| row_number
> PNG_UINT_31_MAX
)
178 if (status_pass
!= pass
)
180 fprintf(stdout
, "\n Pass %d: ", pass
);
187 if (status_dots
== 0)
189 fprintf(stdout
, "\n ");
193 fprintf(stdout
, "r");
196 #ifdef PNG_WRITE_SUPPORTED
198 write_row_callback(png_structp png_ptr
, png_uint_32 row_number
, int pass
)
200 if (png_ptr
== NULL
|| row_number
> PNG_UINT_31_MAX
|| pass
> 7)
203 fprintf(stdout
, "w");
208 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
209 /* Example of using a user transform callback (doesn't do anything at present).
212 read_user_callback(png_structp png_ptr
, png_row_infop row_info
, png_bytep data
)
220 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
221 /* Example of using user transform callback (we don't transform anything,
222 * but merely count the zero samples)
225 static png_uint_32 zero_samples
;
228 count_zero_samples(png_structp png_ptr
, png_row_infop row_info
, png_bytep data
)
234 /* Contents of row_info:
235 * png_uint_32 width width of row
236 * png_uint_32 rowbytes number of bytes in row
237 * png_byte color_type color type of pixels
238 * png_byte bit_depth bit depth of samples
239 * png_byte channels number of channels (1-4)
240 * png_byte pixel_depth bits per pixel (depth*channels)
243 /* Counts the number of zero samples (or zero pixels if color_type is 3 */
245 if (row_info
->color_type
== 0 || row_info
->color_type
== 3)
248 png_uint_32 n
, nstop
;
250 for (n
= 0, nstop
=row_info
->width
; n
<nstop
; n
++)
252 if (row_info
->bit_depth
== 1)
254 if (((*dp
<< pos
++ ) & 0x80) == 0)
264 if (row_info
->bit_depth
== 2)
266 if (((*dp
<< (pos
+=2)) & 0xc0) == 0)
276 if (row_info
->bit_depth
== 4)
278 if (((*dp
<< (pos
+=4)) & 0xf0) == 0)
288 if (row_info
->bit_depth
== 8)
292 if (row_info
->bit_depth
== 16)
294 if ((*dp
| *(dp
+1)) == 0)
300 else /* Other color types */
302 png_uint_32 n
, nstop
;
304 int color_channels
= row_info
->channels
;
305 if (row_info
->color_type
> 3)
308 for (n
= 0, nstop
=row_info
->width
; n
<nstop
; n
++)
310 for (channel
= 0; channel
< color_channels
; channel
++)
312 if (row_info
->bit_depth
== 8)
316 if (row_info
->bit_depth
== 16)
318 if ((*dp
| *(dp
+1)) == 0)
324 if (row_info
->color_type
> 3)
327 if (row_info
->bit_depth
== 16)
333 #endif /* WRITE_USER_TRANSFORM */
335 #ifndef PNG_STDIO_SUPPORTED
336 /* START of code to validate stdio-free compilation */
337 /* These copies of the default read/write functions come from pngrio.c and
338 * pngwio.c. They allow "don't include stdio" testing of the library.
339 * This is the function that does the actual reading of data. If you are
340 * not reading from a standard C stream, you should create a replacement
341 * read_data function and use it at run time with png_set_read_fn(), rather
342 * than changing the library.
345 #ifdef PNG_IO_STATE_SUPPORTED
347 pngtest_check_io_state(png_structp png_ptr
, png_size_t data_length
,
350 pngtest_check_io_state(png_structp png_ptr
, png_size_t data_length
,
353 png_uint_32 io_state
= png_get_io_state(png_ptr
);
356 /* Check if the current operation (reading / writing) is as expected. */
357 if ((io_state
& PNG_IO_MASK_OP
) != io_op
)
358 png_error(png_ptr
, "Incorrect operation in I/O state");
360 /* Check if the buffer size specific to the current location
361 * (file signature / header / data / crc) is as expected.
363 switch (io_state
& PNG_IO_MASK_LOC
)
365 case PNG_IO_SIGNATURE
:
369 case PNG_IO_CHUNK_HDR
:
370 if (data_length
!= 8)
373 case PNG_IO_CHUNK_DATA
:
374 break; /* no restrictions here */
375 case PNG_IO_CHUNK_CRC
:
376 if (data_length
!= 4)
380 err
= 1; /* uninitialized */
383 png_error(png_ptr
, "Bad I/O state or buffer size");
388 pngtest_read_data(png_structp png_ptr
, png_bytep data
, png_size_t length
)
390 png_size_t check
= 0;
393 /* fread() returns 0 on error, so it is OK to store this in a png_size_t
394 * instead of an int, which is what fread() actually returns.
396 io_ptr
= png_get_io_ptr(png_ptr
);
399 check
= fread(data
, 1, length
, (png_FILE_p
)io_ptr
);
404 png_error(png_ptr
, "Read Error");
407 #ifdef PNG_IO_STATE_SUPPORTED
408 pngtest_check_io_state(png_ptr
, length
, PNG_IO_READING
);
412 #ifdef PNG_WRITE_FLUSH_SUPPORTED
414 pngtest_flush(png_structp png_ptr
)
416 /* Do nothing; fflush() is said to be just a waste of energy. */
417 PNG_UNUSED(png_ptr
) /* Stifle compiler warning */
421 /* This is the function that does the actual writing of data. If you are
422 * not writing to a standard C stream, you should create a replacement
423 * write_data function and use it at run time with png_set_write_fn(), rather
424 * than changing the library.
427 pngtest_write_data(png_structp png_ptr
, png_bytep data
, png_size_t length
)
431 check
= fwrite(data
, 1, length
, (png_FILE_p
)png_get_io_ptr(png_ptr
));
435 png_error(png_ptr
, "Write Error");
438 #ifdef PNG_IO_STATE_SUPPORTED
439 pngtest_check_io_state(png_ptr
, length
, PNG_IO_WRITING
);
444 /* This function is called when there is a warning, but the library thinks
445 * it can continue anyway. Replacement functions don't have to do anything
446 * here if you don't want to. In the default configuration, png_ptr is
447 * not used, but it is passed in case it may be useful.
451 PNG_CONST
char *file_name
;
452 } pngtest_error_parameters
;
455 pngtest_warning(png_structp png_ptr
, png_const_charp message
)
457 PNG_CONST
char *name
= "UNKNOWN (ERROR!)";
458 pngtest_error_parameters
*test
=
459 (pngtest_error_parameters
*)png_get_error_ptr(png_ptr
);
463 if (test
!= NULL
&& test
->file_name
!= NULL
)
464 name
= test
->file_name
;
466 fprintf(STDERR
, "%s: libpng warning: %s\n", name
, message
);
469 /* This is the default error handling function. Note that replacements for
470 * this function MUST NOT RETURN, or the program will likely crash. This
471 * function is used by default, or if the program supplies NULL for the
472 * error function pointer in png_set_error_fn().
475 pngtest_error(png_structp png_ptr
, png_const_charp message
)
479 pngtest_warning(png_ptr
, message
);
480 /* We can return because png_error calls the default handler, which is
481 * actually OK in this case.
485 /* END of code to validate stdio-free compilation */
487 /* START of code to validate memory allocation and deallocation */
488 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
490 /* Allocate memory. For reasonable files, size should never exceed
491 * 64K. However, zlib may allocate more than 64K if you don't tell
492 * it not to. See zconf.h and png.h for more information. zlib does
493 * need to allocate exactly 64K, so whatever you call here must
494 * have the ability to do that.
496 * This piece of code can be compiled to validate max 64K allocations
497 * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K.
499 typedef struct memory_information
501 png_alloc_size_t size
;
503 struct memory_information
*next
;
504 } memory_information
;
505 typedef memory_information
*memory_infop
;
507 static memory_infop pinformation
= NULL
;
508 static int current_allocation
= 0;
509 static int maximum_allocation
= 0;
510 static int total_allocation
= 0;
511 static int num_allocations
= 0;
513 png_voidp PNGCBAPI png_debug_malloc
PNGARG((png_structp png_ptr
,
514 png_alloc_size_t size
));
515 void PNGCBAPI png_debug_free
PNGARG((png_structp png_ptr
, png_voidp ptr
));
518 PNGCBAPI
png_debug_malloc(png_structp png_ptr
, png_alloc_size_t size
)
521 /* png_malloc has already tested for NULL; png_create_struct calls
522 * png_debug_malloc directly, with png_ptr == NULL which is OK
528 /* This calls the library allocator twice, once to get the requested
529 buffer and once to get a new free list entry. */
531 /* Disable malloc_fn and free_fn */
533 png_set_mem_fn(png_ptr
, NULL
, NULL
, NULL
);
534 pinfo
= (memory_infop
)png_malloc(png_ptr
,
537 current_allocation
+= size
;
538 total_allocation
+= size
;
541 if (current_allocation
> maximum_allocation
)
542 maximum_allocation
= current_allocation
;
544 pinfo
->pointer
= png_malloc(png_ptr
, size
);
545 /* Restore malloc_fn and free_fn */
547 png_set_mem_fn(png_ptr
,
548 NULL
, png_debug_malloc
, png_debug_free
);
550 if (size
!= 0 && pinfo
->pointer
== NULL
)
552 current_allocation
-= size
;
553 total_allocation
-= size
;
555 "out of memory in pngtest->png_debug_malloc");
558 pinfo
->next
= pinformation
;
559 pinformation
= pinfo
;
560 /* Make sure the caller isn't assuming zeroed memory. */
561 memset(pinfo
->pointer
, 0xdd, pinfo
->size
);
564 printf("png_malloc %lu bytes at %p\n", (unsigned long)size
,
567 return (png_voidp
)(pinfo
->pointer
);
571 /* Free a pointer. It is removed from the list at the same time. */
573 png_debug_free(png_structp png_ptr
, png_voidp ptr
)
576 fprintf(STDERR
, "NULL pointer to png_debug_free.\n");
580 #if 0 /* This happens all the time. */
581 fprintf(STDERR
, "WARNING: freeing NULL pointer\n");
586 /* Unlink the element from the list. */
587 if (pinformation
!= NULL
)
589 memory_infop
*ppinfo
= &pinformation
;
593 memory_infop pinfo
= *ppinfo
;
595 if (pinfo
->pointer
== ptr
)
597 *ppinfo
= pinfo
->next
;
598 current_allocation
-= pinfo
->size
;
599 if (current_allocation
< 0)
600 fprintf(STDERR
, "Duplicate free of memory\n");
601 /* We must free the list element too, but first kill
602 the memory that is to be freed. */
603 memset(ptr
, 0x55, pinfo
->size
);
609 if (pinfo
->next
== NULL
)
611 fprintf(STDERR
, "Pointer %p not found\n", ptr
);
615 ppinfo
= &pinfo
->next
;
619 /* Finally free the data. */
621 printf("Freeing %p\n", ptr
);
627 #endif /* USER_MEM && DEBUG */
628 /* END of code to test memory allocation/deallocation */
631 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
632 /* Demonstration of user chunk support of the sTER and vpAg chunks */
634 /* (sTER is a public chunk not yet known by libpng. vpAg is a private
635 chunk used in ImageMagick to store "virtual page" size). */
637 static struct user_chunk_data
639 png_const_infop info_ptr
;
640 png_uint_32 vpAg_width
, vpAg_height
;
647 /* Used for location and order; zero means nothing. */
648 #define have_sTER 0x01
649 #define have_vpAg 0x02
650 #define before_PLTE 0x10
651 #define before_IDAT 0x20
652 #define after_IDAT 0x40
655 init_callback_info(png_const_infop info_ptr
)
657 MEMZERO(user_chunk_data
);
658 user_chunk_data
.info_ptr
= info_ptr
;
662 set_location(png_structp png_ptr
, struct user_chunk_data
*data
, int what
)
666 if ((data
->location
[0] & what
) != 0 || (data
->location
[1] & what
) != 0)
667 return 0; /* already have one of these */
669 /* Find where we are (the code below zeroes info_ptr to indicate that the
670 * chunks before the first IDAT have been read.)
672 if (data
->info_ptr
== NULL
) /* after IDAT */
673 location
= what
| after_IDAT
;
675 else if (png_get_valid(png_ptr
, data
->info_ptr
, PNG_INFO_PLTE
) != 0)
676 location
= what
| before_IDAT
;
679 location
= what
| before_PLTE
;
681 if (data
->location
[0] == 0)
682 data
->location
[0] = location
;
685 data
->location
[1] = location
;
687 return 1; /* handled */
691 read_user_chunk_callback(png_struct
*png_ptr
, png_unknown_chunkp chunk
)
693 struct user_chunk_data
*my_user_chunk_data
=
694 (struct user_chunk_data
*)png_get_user_chunk_ptr(png_ptr
);
696 if (my_user_chunk_data
== NULL
)
697 png_error(png_ptr
, "lost user chunk pointer");
699 /* Return one of the following:
700 * return (-n); chunk had an error
701 * return (0); did not recognize
702 * return (n); success
704 * The unknown chunk structure contains the chunk data:
709 * Note that libpng has already taken care of the CRC handling.
712 if (chunk
->name
[0] == 115 && chunk
->name
[1] == 84 && /* s T */
713 chunk
->name
[2] == 69 && chunk
->name
[3] == 82) /* E R */
715 /* Found sTER chunk */
716 if (chunk
->size
!= 1)
717 return (-1); /* Error return */
719 if (chunk
->data
[0] != 0 && chunk
->data
[0] != 1)
720 return (-1); /* Invalid mode */
722 if (set_location(png_ptr
, my_user_chunk_data
, have_sTER
) != 0)
724 my_user_chunk_data
->sTER_mode
=chunk
->data
[0];
729 return (0); /* duplicate sTER - give it to libpng */
732 if (chunk
->name
[0] != 118 || chunk
->name
[1] != 112 || /* v p */
733 chunk
->name
[2] != 65 || chunk
->name
[3] != 103) /* A g */
734 return (0); /* Did not recognize */
736 /* Found ImageMagick vpAg chunk */
738 if (chunk
->size
!= 9)
739 return (-1); /* Error return */
741 if (set_location(png_ptr
, my_user_chunk_data
, have_vpAg
) == 0)
742 return (0); /* duplicate vpAg */
744 my_user_chunk_data
->vpAg_width
= png_get_uint_31(png_ptr
, chunk
->data
);
745 my_user_chunk_data
->vpAg_height
= png_get_uint_31(png_ptr
, chunk
->data
+ 4);
746 my_user_chunk_data
->vpAg_units
= chunk
->data
[8];
751 #ifdef PNG_WRITE_SUPPORTED
753 write_sTER_chunk(png_structp write_ptr
)
755 png_byte sTER
[5] = {115, 84, 69, 82, '\0'};
758 fprintf(STDERR
, "\n stereo mode = %d\n", user_chunk_data
.sTER_mode
);
760 png_write_chunk(write_ptr
, sTER
, &user_chunk_data
.sTER_mode
, 1);
764 write_vpAg_chunk(png_structp write_ptr
)
766 png_byte vpAg
[5] = {118, 112, 65, 103, '\0'};
768 png_byte vpag_chunk_data
[9];
771 fprintf(STDERR
, " vpAg = %lu x %lu, units = %d\n",
772 (unsigned long)user_chunk_data
.vpAg_width
,
773 (unsigned long)user_chunk_data
.vpAg_height
,
774 user_chunk_data
.vpAg_units
);
776 png_save_uint_32(vpag_chunk_data
, user_chunk_data
.vpAg_width
);
777 png_save_uint_32(vpag_chunk_data
+ 4, user_chunk_data
.vpAg_height
);
778 vpag_chunk_data
[8] = user_chunk_data
.vpAg_units
;
779 png_write_chunk(write_ptr
, vpAg
, vpag_chunk_data
, 9);
783 write_chunks(png_structp write_ptr
, int location
)
787 /* Notice that this preserves the original chunk order, however chunks
788 * intercepted by the callback will be written *after* chunks passed to
789 * libpng. This will actually reverse a pair of sTER chunks or a pair of
790 * vpAg chunks, resulting in an error later. This is not worth worrying
791 * about - the chunks should not be duplicated!
795 if (user_chunk_data
.location
[i
] == (location
| have_sTER
))
796 write_sTER_chunk(write_ptr
);
798 else if (user_chunk_data
.location
[i
] == (location
| have_vpAg
))
799 write_vpAg_chunk(write_ptr
);
803 #else /* !READ_USER_CHUNKS */
804 # define write_chunks(pp,loc) ((void)0)
806 /* END of code to demonstrate user chunk support */
808 /* START of code to check that libpng has the required text support; this only
809 * checks for the write support because if read support is missing the chunk
810 * will simply not be reported back to pngtest.
812 #ifdef PNG_TEXT_SUPPORTED
814 pngtest_check_text_support(png_structp png_ptr
, png_textp text_ptr
,
819 switch (text_ptr
[--num_text
].compression
)
821 case PNG_TEXT_COMPRESSION_NONE
:
824 case PNG_TEXT_COMPRESSION_zTXt
:
825 # ifndef PNG_WRITE_zTXt_SUPPORTED
826 ++unsupported_chunks
;
827 /* In libpng 1.7 this now does an app-error, so stop it: */
828 text_ptr
[num_text
].compression
= PNG_TEXT_COMPRESSION_NONE
;
832 case PNG_ITXT_COMPRESSION_NONE
:
833 case PNG_ITXT_COMPRESSION_zTXt
:
834 # ifndef PNG_WRITE_iTXt_SUPPORTED
835 ++unsupported_chunks
;
836 text_ptr
[num_text
].compression
= PNG_TEXT_COMPRESSION_NONE
;
841 /* This is an error */
842 png_error(png_ptr
, "invalid text chunk compression field");
848 /* END of code to check that libpng has the required text support */
852 test_one_file(PNG_CONST
char *inname
, PNG_CONST
char *outname
)
854 static png_FILE_p fpin
;
855 static png_FILE_p fpout
; /* "static" prevents setjmp corruption */
856 pngtest_error_parameters error_parameters
;
857 png_structp read_ptr
;
858 png_infop read_info_ptr
, end_info_ptr
;
859 #ifdef PNG_WRITE_SUPPORTED
860 png_structp write_ptr
;
861 png_infop write_info_ptr
;
862 png_infop write_end_info_ptr
;
863 #ifdef PNG_WRITE_FILTER_SUPPORTED
864 int interlace_preserved
= 1;
865 #endif /* WRITE_FILTER */
867 png_structp write_ptr
= NULL
;
868 png_infop write_info_ptr
= NULL
;
869 png_infop write_end_info_ptr
= NULL
;
873 png_uint_32 width
, height
;
874 volatile int num_passes
;
876 int bit_depth
, color_type
;
879 error_parameters
.file_name
= inname
;
881 if ((fpin
= fopen(inname
, "rb")) == NULL
)
883 fprintf(STDERR
, "Could not find input file %s\n", inname
);
887 if ((fpout
= fopen(outname
, "wb")) == NULL
)
889 fprintf(STDERR
, "Could not open output file %s\n", outname
);
894 pngtest_debug("Allocating read and write structures");
895 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
897 png_create_read_struct_2(PNG_LIBPNG_VER_STRING
, NULL
,
898 NULL
, NULL
, NULL
, png_debug_malloc
, png_debug_free
);
901 png_create_read_struct(PNG_LIBPNG_VER_STRING
, NULL
, NULL
, NULL
);
903 png_set_error_fn(read_ptr
, &error_parameters
, pngtest_error
,
906 #ifdef PNG_WRITE_SUPPORTED
907 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
909 png_create_write_struct_2(PNG_LIBPNG_VER_STRING
, NULL
,
910 NULL
, NULL
, NULL
, png_debug_malloc
, png_debug_free
);
913 png_create_write_struct(PNG_LIBPNG_VER_STRING
, NULL
, NULL
, NULL
);
915 png_set_error_fn(write_ptr
, &error_parameters
, pngtest_error
,
918 pngtest_debug("Allocating read_info, write_info and end_info structures");
919 read_info_ptr
= png_create_info_struct(read_ptr
);
920 end_info_ptr
= png_create_info_struct(read_ptr
);
921 #ifdef PNG_WRITE_SUPPORTED
922 write_info_ptr
= png_create_info_struct(write_ptr
);
923 write_end_info_ptr
= png_create_info_struct(write_ptr
);
926 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
927 init_callback_info(read_info_ptr
);
928 png_set_read_user_chunk_fn(read_ptr
, &user_chunk_data
,
929 read_user_chunk_callback
);
932 #ifdef PNG_SETJMP_SUPPORTED
933 pngtest_debug("Setting jmpbuf for read struct");
934 if (setjmp(png_jmpbuf(read_ptr
)))
936 fprintf(STDERR
, "%s -> %s: libpng read error\n", inname
, outname
);
937 png_free(read_ptr
, row_buf
);
939 png_destroy_read_struct(&read_ptr
, &read_info_ptr
, &end_info_ptr
);
940 #ifdef PNG_WRITE_SUPPORTED
941 png_destroy_info_struct(write_ptr
, &write_end_info_ptr
);
942 png_destroy_write_struct(&write_ptr
, &write_info_ptr
);
949 #ifdef PNG_WRITE_SUPPORTED
950 pngtest_debug("Setting jmpbuf for write struct");
952 if (setjmp(png_jmpbuf(write_ptr
)))
954 fprintf(STDERR
, "%s -> %s: libpng write error\n", inname
, outname
);
955 png_destroy_read_struct(&read_ptr
, &read_info_ptr
, &end_info_ptr
);
956 png_destroy_info_struct(write_ptr
, &write_end_info_ptr
);
957 #ifdef PNG_WRITE_SUPPORTED
958 png_destroy_write_struct(&write_ptr
, &write_info_ptr
);
969 /* Treat png_benign_error() as errors on read */
970 png_set_benign_errors(read_ptr
, 0);
972 #ifdef PNG_WRITE_SUPPORTED
973 /* Treat them as errors on write */
974 png_set_benign_errors(write_ptr
, 0);
977 /* if strict is not set, then app warnings and errors are treated as
978 * warnings in release builds, but not in unstable builds; this can be
979 * changed with '--relaxed'.
983 else if (relaxed
!= 0)
985 /* Allow application (pngtest) errors and warnings to pass */
986 png_set_benign_errors(read_ptr
, 1);
988 #ifdef PNG_WRITE_SUPPORTED
989 png_set_benign_errors(write_ptr
, 1);
993 pngtest_debug("Initializing input and output streams");
994 #ifdef PNG_STDIO_SUPPORTED
995 png_init_io(read_ptr
, fpin
);
996 # ifdef PNG_WRITE_SUPPORTED
997 png_init_io(write_ptr
, fpout
);
1000 png_set_read_fn(read_ptr
, (png_voidp
)fpin
, pngtest_read_data
);
1001 # ifdef PNG_WRITE_SUPPORTED
1002 png_set_write_fn(write_ptr
, (png_voidp
)fpout
, pngtest_write_data
,
1003 # ifdef PNG_WRITE_FLUSH_SUPPORTED
1011 if (status_dots_requested
== 1)
1013 #ifdef PNG_WRITE_SUPPORTED
1014 png_set_write_status_fn(write_ptr
, write_row_callback
);
1016 png_set_read_status_fn(read_ptr
, read_row_callback
);
1021 #ifdef PNG_WRITE_SUPPORTED
1022 png_set_write_status_fn(write_ptr
, NULL
);
1024 png_set_read_status_fn(read_ptr
, NULL
);
1027 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1028 png_set_read_user_transform_fn(read_ptr
, read_user_callback
);
1030 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1032 png_set_write_user_transform_fn(write_ptr
, count_zero_samples
);
1035 #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
1036 /* Preserve all the unknown chunks, if possible. If this is disabled then,
1037 * even if the png_{get,set}_unknown_chunks stuff is enabled, we can't use
1038 * libpng to *save* the unknown chunks on read (because we can't switch the
1041 * Notice that if SET_UNKNOWN_CHUNKS is *not* supported read will discard all
1042 * unknown chunks and write will write them all.
1044 #ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
1045 png_set_keep_unknown_chunks(read_ptr
, PNG_HANDLE_CHUNK_ALWAYS
,
1048 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1049 png_set_keep_unknown_chunks(write_ptr
, PNG_HANDLE_CHUNK_ALWAYS
,
1054 pngtest_debug("Reading info struct");
1055 png_read_info(read_ptr
, read_info_ptr
);
1057 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1058 /* This is a bit of a hack; there is no obvious way in the callback function
1059 * to determine that the chunks before the first IDAT have been read, so
1060 * remove the info_ptr (which is only used to determine position relative to
1061 * PLTE) here to indicate that we are after the IDAT.
1063 user_chunk_data
.info_ptr
= NULL
;
1066 pngtest_debug("Transferring info struct");
1068 int interlace_type
, compression_type
, filter_type
;
1070 if (png_get_IHDR(read_ptr
, read_info_ptr
, &width
, &height
, &bit_depth
,
1071 &color_type
, &interlace_type
, &compression_type
, &filter_type
) != 0)
1073 png_set_IHDR(write_ptr
, write_info_ptr
, width
, height
, bit_depth
,
1074 color_type
, interlace_type
, compression_type
, filter_type
);
1075 /* num_passes may not be available below if interlace support is not
1076 * provided by libpng for both read and write.
1078 switch (interlace_type
)
1080 case PNG_INTERLACE_NONE
:
1084 case PNG_INTERLACE_ADAM7
:
1089 png_error(read_ptr
, "invalid interlace type");
1095 png_error(read_ptr
, "png_get_IHDR failed");
1097 #ifdef PNG_FIXED_POINT_SUPPORTED
1098 #ifdef PNG_cHRM_SUPPORTED
1100 png_fixed_point white_x
, white_y
, red_x
, red_y
, green_x
, green_y
, blue_x
,
1103 if (png_get_cHRM_fixed(read_ptr
, read_info_ptr
, &white_x
, &white_y
,
1104 &red_x
, &red_y
, &green_x
, &green_y
, &blue_x
, &blue_y
) != 0)
1106 png_set_cHRM_fixed(write_ptr
, write_info_ptr
, white_x
, white_y
, red_x
,
1107 red_y
, green_x
, green_y
, blue_x
, blue_y
);
1111 #ifdef PNG_gAMA_SUPPORTED
1113 png_fixed_point gamma
;
1115 if (png_get_gAMA_fixed(read_ptr
, read_info_ptr
, &gamma
) != 0)
1116 png_set_gAMA_fixed(write_ptr
, write_info_ptr
, gamma
);
1119 #else /* Use floating point versions */
1120 #ifdef PNG_FLOATING_POINT_SUPPORTED
1121 #ifdef PNG_cHRM_SUPPORTED
1123 double white_x
, white_y
, red_x
, red_y
, green_x
, green_y
, blue_x
,
1126 if (png_get_cHRM(read_ptr
, read_info_ptr
, &white_x
, &white_y
, &red_x
,
1127 &red_y
, &green_x
, &green_y
, &blue_x
, &blue_y
) != 0)
1129 png_set_cHRM(write_ptr
, write_info_ptr
, white_x
, white_y
, red_x
,
1130 red_y
, green_x
, green_y
, blue_x
, blue_y
);
1134 #ifdef PNG_gAMA_SUPPORTED
1138 if (png_get_gAMA(read_ptr
, read_info_ptr
, &gamma
) != 0)
1139 png_set_gAMA(write_ptr
, write_info_ptr
, gamma
);
1142 #endif /* Floating point */
1143 #endif /* Fixed point */
1144 #ifdef PNG_iCCP_SUPPORTED
1148 png_uint_32 proflen
;
1149 int compression_type
;
1151 if (png_get_iCCP(read_ptr
, read_info_ptr
, &name
, &compression_type
,
1152 &profile
, &proflen
) != 0)
1154 png_set_iCCP(write_ptr
, write_info_ptr
, name
, compression_type
,
1159 #ifdef PNG_sRGB_SUPPORTED
1163 if (png_get_sRGB(read_ptr
, read_info_ptr
, &intent
) != 0)
1164 png_set_sRGB(write_ptr
, write_info_ptr
, intent
);
1171 if (png_get_PLTE(read_ptr
, read_info_ptr
, &palette
, &num_palette
) != 0)
1172 png_set_PLTE(write_ptr
, write_info_ptr
, palette
, num_palette
);
1174 #ifdef PNG_bKGD_SUPPORTED
1176 png_color_16p background
;
1178 if (png_get_bKGD(read_ptr
, read_info_ptr
, &background
) != 0)
1180 png_set_bKGD(write_ptr
, write_info_ptr
, background
);
1184 #ifdef PNG_hIST_SUPPORTED
1188 if (png_get_hIST(read_ptr
, read_info_ptr
, &hist
) != 0)
1189 png_set_hIST(write_ptr
, write_info_ptr
, hist
);
1192 #ifdef PNG_oFFs_SUPPORTED
1194 png_int_32 offset_x
, offset_y
;
1197 if (png_get_oFFs(read_ptr
, read_info_ptr
, &offset_x
, &offset_y
,
1200 png_set_oFFs(write_ptr
, write_info_ptr
, offset_x
, offset_y
, unit_type
);
1204 #ifdef PNG_pCAL_SUPPORTED
1206 png_charp purpose
, units
;
1211 if (png_get_pCAL(read_ptr
, read_info_ptr
, &purpose
, &X0
, &X1
, &type
,
1212 &nparams
, &units
, ¶ms
) != 0)
1214 png_set_pCAL(write_ptr
, write_info_ptr
, purpose
, X0
, X1
, type
,
1215 nparams
, units
, params
);
1219 #ifdef PNG_pHYs_SUPPORTED
1221 png_uint_32 res_x
, res_y
;
1224 if (png_get_pHYs(read_ptr
, read_info_ptr
, &res_x
, &res_y
,
1226 png_set_pHYs(write_ptr
, write_info_ptr
, res_x
, res_y
, unit_type
);
1229 #ifdef PNG_sBIT_SUPPORTED
1231 png_color_8p sig_bit
;
1233 if (png_get_sBIT(read_ptr
, read_info_ptr
, &sig_bit
) != 0)
1234 png_set_sBIT(write_ptr
, write_info_ptr
, sig_bit
);
1237 #ifdef PNG_sCAL_SUPPORTED
1238 #if defined(PNG_FLOATING_POINT_SUPPORTED) && \
1239 defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
1242 double scal_width
, scal_height
;
1244 if (png_get_sCAL(read_ptr
, read_info_ptr
, &unit
, &scal_width
,
1247 png_set_sCAL(write_ptr
, write_info_ptr
, unit
, scal_width
, scal_height
);
1251 #ifdef PNG_FIXED_POINT_SUPPORTED
1254 png_charp scal_width
, scal_height
;
1256 if (png_get_sCAL_s(read_ptr
, read_info_ptr
, &unit
, &scal_width
,
1259 png_set_sCAL_s(write_ptr
, write_info_ptr
, unit
, scal_width
,
1267 #ifdef PNG_sPLT_SUPPORTED
1269 png_sPLT_tp entries
;
1271 int num_entries
= (int) png_get_sPLT(read_ptr
, read_info_ptr
, &entries
);
1274 png_set_sPLT(write_ptr
, write_info_ptr
, entries
, num_entries
);
1279 #ifdef PNG_TEXT_SUPPORTED
1284 if (png_get_text(read_ptr
, read_info_ptr
, &text_ptr
, &num_text
) > 0)
1286 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text
);
1288 pngtest_check_text_support(read_ptr
, text_ptr
, num_text
);
1295 for (i
=0; i
<num_text
; i
++)
1297 printf(" Text compression[%d]=%d\n",
1298 i
, text_ptr
[i
].compression
);
1302 png_set_text(write_ptr
, write_info_ptr
, text_ptr
, num_text
);
1306 #ifdef PNG_tIME_SUPPORTED
1310 if (png_get_tIME(read_ptr
, read_info_ptr
, &mod_time
) != 0)
1312 png_set_tIME(write_ptr
, write_info_ptr
, mod_time
);
1313 #ifdef PNG_TIME_RFC1123_SUPPORTED
1314 if (png_convert_to_rfc1123_buffer(tIME_string
, mod_time
) != 0)
1315 tIME_string
[(sizeof tIME_string
) - 1] = '\0';
1319 strncpy(tIME_string
, "*** invalid time ***", (sizeof tIME_string
));
1320 tIME_string
[(sizeof tIME_string
) - 1] = '\0';
1323 tIME_chunk_present
++;
1324 #endif /* TIME_RFC1123 */
1328 #ifdef PNG_tRNS_SUPPORTED
1330 png_bytep trans_alpha
;
1332 png_color_16p trans_color
;
1334 if (png_get_tRNS(read_ptr
, read_info_ptr
, &trans_alpha
, &num_trans
,
1337 int sample_max
= (1 << bit_depth
);
1338 /* libpng doesn't reject a tRNS chunk with out-of-range samples */
1339 if (!((color_type
== PNG_COLOR_TYPE_GRAY
&&
1340 (int)trans_color
->gray
> sample_max
) ||
1341 (color_type
== PNG_COLOR_TYPE_RGB
&&
1342 ((int)trans_color
->red
> sample_max
||
1343 (int)trans_color
->green
> sample_max
||
1344 (int)trans_color
->blue
> sample_max
))))
1345 png_set_tRNS(write_ptr
, write_info_ptr
, trans_alpha
, num_trans
,
1350 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1352 png_unknown_chunkp unknowns
;
1353 int num_unknowns
= png_get_unknown_chunks(read_ptr
, read_info_ptr
,
1356 if (num_unknowns
!= 0)
1358 png_set_unknown_chunks(write_ptr
, write_info_ptr
, unknowns
,
1360 #if PNG_LIBPNG_VER < 10600
1361 /* Copy the locations from the read_info_ptr. The automatically
1362 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1363 * because they are reset from the write pointer (removed in 1.6.0).
1367 for (i
= 0; i
< num_unknowns
; i
++)
1368 png_set_unknown_chunk_location(write_ptr
, write_info_ptr
, i
,
1369 unknowns
[i
].location
);
1376 #ifdef PNG_WRITE_SUPPORTED
1377 pngtest_debug("Writing info struct");
1379 /* Write the info in two steps so that if we write the 'unknown' chunks here
1380 * they go to the correct place.
1382 png_write_info_before_PLTE(write_ptr
, write_info_ptr
);
1384 write_chunks(write_ptr
, before_PLTE
); /* before PLTE */
1386 png_write_info(write_ptr
, write_info_ptr
);
1388 write_chunks(write_ptr
, before_IDAT
); /* after PLTE */
1391 #ifdef SINGLE_ROWBUF_ALLOC
1392 pngtest_debug("Allocating row buffer...");
1393 row_buf
= (png_bytep
)png_malloc(read_ptr
,
1394 png_get_rowbytes(read_ptr
, read_info_ptr
));
1396 pngtest_debug1("\t0x%08lx", (unsigned long)row_buf
);
1397 #endif /* SINGLE_ROWBUF_ALLOC */
1398 pngtest_debug("Writing row data");
1400 #if defined(PNG_READ_INTERLACING_SUPPORTED) &&\
1401 defined(PNG_WRITE_INTERLACING_SUPPORTED)
1402 /* Both must be defined for libpng to be able to handle the interlace,
1403 * otherwise it gets handled below by simply reading and writing the passes
1406 if (png_set_interlace_handling(read_ptr
) != num_passes
)
1407 png_error(write_ptr
,
1408 "png_set_interlace_handling(read): wrong pass count ");
1409 if (png_set_interlace_handling(write_ptr
) != num_passes
)
1410 png_error(write_ptr
,
1411 "png_set_interlace_handling(write): wrong pass count ");
1412 #else /* png_set_interlace_handling not called on either read or write */
1413 # define calc_pass_height
1414 #endif /* not using libpng interlace handling */
1416 #ifdef PNGTEST_TIMING
1417 t_stop
= (float)clock();
1418 t_misc
+= (t_stop
- t_start
);
1421 for (pass
= 0; pass
< num_passes
; pass
++)
1423 # ifdef calc_pass_height
1424 png_uint_32 pass_height
;
1426 if (num_passes
== 7) /* interlaced */
1428 if (PNG_PASS_COLS(width
, pass
) > 0)
1429 pass_height
= PNG_PASS_ROWS(height
, pass
);
1435 else /* not interlaced */
1436 pass_height
= height
;
1438 # define pass_height height
1441 pngtest_debug1("Writing row data for pass %d", pass
);
1442 for (y
= 0; y
< pass_height
; y
++)
1444 #ifndef SINGLE_ROWBUF_ALLOC
1445 pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass
, y
);
1447 row_buf
= (png_bytep
)png_malloc(read_ptr
,
1448 png_get_rowbytes(read_ptr
, read_info_ptr
));
1450 pngtest_debug2("\t0x%08lx (%lu bytes)", (unsigned long)row_buf
,
1451 (unsigned long)png_get_rowbytes(read_ptr
, read_info_ptr
));
1453 #endif /* !SINGLE_ROWBUF_ALLOC */
1454 png_read_rows(read_ptr
, (png_bytepp
)&row_buf
, NULL
, 1);
1456 #ifdef PNG_WRITE_SUPPORTED
1457 #ifdef PNGTEST_TIMING
1458 t_stop
= (float)clock();
1459 t_decode
+= (t_stop
- t_start
);
1462 png_write_rows(write_ptr
, (png_bytepp
)&row_buf
, 1);
1463 #ifdef PNGTEST_TIMING
1464 t_stop
= (float)clock();
1465 t_encode
+= (t_stop
- t_start
);
1470 #ifndef SINGLE_ROWBUF_ALLOC
1471 pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass
, y
);
1472 png_free(read_ptr
, row_buf
);
1474 #endif /* !SINGLE_ROWBUF_ALLOC */
1478 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
1479 # ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1480 png_free_data(read_ptr
, read_info_ptr
, PNG_FREE_UNKN
, -1);
1482 # ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1483 png_free_data(write_ptr
, write_info_ptr
, PNG_FREE_UNKN
, -1);
1487 pngtest_debug("Reading and writing end_info data");
1489 png_read_end(read_ptr
, end_info_ptr
);
1490 #ifdef PNG_TEXT_SUPPORTED
1495 if (png_get_text(read_ptr
, end_info_ptr
, &text_ptr
, &num_text
) > 0)
1497 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text
);
1499 pngtest_check_text_support(read_ptr
, text_ptr
, num_text
);
1506 for (i
=0; i
<num_text
; i
++)
1508 printf(" Text compression[%d]=%d\n",
1509 i
, text_ptr
[i
].compression
);
1513 png_set_text(write_ptr
, write_end_info_ptr
, text_ptr
, num_text
);
1517 #ifdef PNG_tIME_SUPPORTED
1521 if (png_get_tIME(read_ptr
, end_info_ptr
, &mod_time
) != 0)
1523 png_set_tIME(write_ptr
, write_end_info_ptr
, mod_time
);
1524 #ifdef PNG_TIME_RFC1123_SUPPORTED
1525 if (png_convert_to_rfc1123_buffer(tIME_string
, mod_time
) != 0)
1526 tIME_string
[(sizeof tIME_string
) - 1] = '\0';
1530 strncpy(tIME_string
, "*** invalid time ***", sizeof tIME_string
);
1531 tIME_string
[(sizeof tIME_string
)-1] = '\0';
1534 tIME_chunk_present
++;
1535 #endif /* TIME_RFC1123 */
1539 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1541 png_unknown_chunkp unknowns
;
1542 int num_unknowns
= png_get_unknown_chunks(read_ptr
, end_info_ptr
,
1545 if (num_unknowns
!= 0)
1547 png_set_unknown_chunks(write_ptr
, write_end_info_ptr
, unknowns
,
1549 #if PNG_LIBPNG_VER < 10600
1550 /* Copy the locations from the read_info_ptr. The automatically
1551 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1552 * because they are reset from the write pointer (removed in 1.6.0).
1556 for (i
= 0; i
< num_unknowns
; i
++)
1557 png_set_unknown_chunk_location(write_ptr
, write_end_info_ptr
, i
,
1558 unknowns
[i
].location
);
1565 #ifdef PNG_WRITE_SUPPORTED
1566 #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
1567 /* Normally one would use Z_DEFAULT_STRATEGY for text compression.
1568 * This is here just to make pngtest replicate the results from libpng
1569 * versions prior to 1.5.4, and to test this new API.
1571 png_set_text_compression_strategy(write_ptr
, Z_FILTERED
);
1574 /* When the unknown vpAg/sTER chunks are written by pngtest the only way to
1575 * do it is to write them *before* calling png_write_end. When unknown
1576 * chunks are written by libpng, however, they are written just before IEND.
1577 * There seems to be no way round this, however vpAg/sTER are not expected
1580 write_chunks(write_ptr
, after_IDAT
);
1582 png_write_end(write_ptr
, write_end_info_ptr
);
1585 #ifdef PNG_EASY_ACCESS_SUPPORTED
1588 png_uint_32 iwidth
, iheight
;
1589 iwidth
= png_get_image_width(write_ptr
, write_info_ptr
);
1590 iheight
= png_get_image_height(write_ptr
, write_info_ptr
);
1591 fprintf(STDERR
, "\n Image width = %lu, height = %lu\n",
1592 (unsigned long)iwidth
, (unsigned long)iheight
);
1596 pngtest_debug("Destroying data structs");
1597 #ifdef SINGLE_ROWBUF_ALLOC
1598 pngtest_debug("destroying row_buf for read_ptr");
1599 png_free(read_ptr
, row_buf
);
1601 #endif /* SINGLE_ROWBUF_ALLOC */
1602 pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr");
1603 png_destroy_read_struct(&read_ptr
, &read_info_ptr
, &end_info_ptr
);
1604 #ifdef PNG_WRITE_SUPPORTED
1605 pngtest_debug("destroying write_end_info_ptr");
1606 png_destroy_info_struct(write_ptr
, &write_end_info_ptr
);
1607 pngtest_debug("destroying write_ptr, write_info_ptr");
1608 png_destroy_write_struct(&write_ptr
, &write_info_ptr
);
1610 pngtest_debug("Destruction complete.");
1615 /* Summarize any warnings or errors and in 'strict' mode fail the test.
1616 * Unsupported chunks can result in warnings, in that case ignore the strict
1617 * setting, otherwise fail the test on warnings as well as errors.
1619 if (error_count
> 0)
1621 /* We don't really expect to get here because of the setjmp handling
1622 * above, but this is safe.
1624 fprintf(STDERR
, "\n %s: %d libpng errors found (%d warnings)",
1625 inname
, error_count
, warning_count
);
1631 # ifdef PNG_WRITE_SUPPORTED
1632 /* If there is no write support nothing was written! */
1633 else if (unsupported_chunks
> 0)
1635 fprintf(STDERR
, "\n %s: unsupported chunks (%d)%s",
1636 inname
, unsupported_chunks
, strict
? ": IGNORED --strict!" : "");
1640 else if (warning_count
> 0)
1642 fprintf(STDERR
, "\n %s: %d libpng warnings found",
1643 inname
, warning_count
);
1649 pngtest_debug("Opening files for comparison");
1650 if ((fpin
= fopen(inname
, "rb")) == NULL
)
1652 fprintf(STDERR
, "Could not find file %s\n", inname
);
1656 if ((fpout
= fopen(outname
, "rb")) == NULL
)
1658 fprintf(STDERR
, "Could not find file %s\n", outname
);
1663 #if defined (PNG_WRITE_SUPPORTED) /* else nothing was written */ &&\
1664 defined (PNG_WRITE_FILTER_SUPPORTED)
1665 if (interlace_preserved
!= 0) /* else the files will be changed */
1669 static int wrote_question
= 0;
1670 png_size_t num_in
, num_out
;
1671 char inbuf
[256], outbuf
[256];
1673 num_in
= fread(inbuf
, 1, sizeof inbuf
, fpin
);
1674 num_out
= fread(outbuf
, 1, sizeof outbuf
, fpout
);
1676 if (num_in
!= num_out
)
1678 fprintf(STDERR
, "\nFiles %s and %s are of a different size\n",
1681 if (wrote_question
== 0 && unsupported_chunks
== 0)
1684 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1685 inname
, PNG_ZBUF_SIZE
);
1687 "\n filtering heuristic (libpng default), compression");
1689 " level (zlib default),\n and zlib version (%s)?\n\n",
1697 if (strict
!= 0 && unsupported_chunks
== 0)
1707 if (memcmp(inbuf
, outbuf
, num_in
))
1709 fprintf(STDERR
, "\nFiles %s and %s are different\n", inname
,
1712 if (wrote_question
== 0 && unsupported_chunks
== 0)
1715 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1716 inname
, PNG_ZBUF_SIZE
);
1718 "\n filtering heuristic (libpng default), compression");
1720 " level (zlib default),\n and zlib version (%s)?\n\n",
1728 /* NOTE: the unsupported_chunks escape is permitted here because
1729 * unsupported text chunk compression will result in the compression
1730 * mode being changed (to NONE) yet, in the test case, the result
1731 * can be exactly the same size!
1733 if (strict
!= 0 && unsupported_chunks
== 0)
1741 #endif /* WRITE && WRITE_FILTER */
1749 /* Input and output filenames */
1751 static PNG_CONST
char *inname
= "pngtest/png";
1752 static PNG_CONST
char *outname
= "pngout/png";
1754 static PNG_CONST
char *inname
= "pngtest.png";
1755 static PNG_CONST
char *outname
= "pngout.png";
1759 main(int argc
, char *argv
[])
1764 png_structp dummy_ptr
;
1766 fprintf(STDERR
, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING
);
1767 fprintf(STDERR
, " with zlib version %s\n", ZLIB_VERSION
);
1768 fprintf(STDERR
, "%s", png_get_copyright(NULL
));
1769 /* Show the version of libpng used in building the library */
1770 fprintf(STDERR
, " library (%lu):%s",
1771 (unsigned long)png_access_version_number(),
1772 png_get_header_version(NULL
));
1774 /* Show the version of libpng used in building the application */
1775 fprintf(STDERR
, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER
,
1776 PNG_HEADER_VERSION_STRING
);
1778 /* Do some consistency checking on the memory allocation settings, I'm
1779 * not sure this matters, but it is nice to know, the first of these
1780 * tests should be impossible because of the way the macros are set
1783 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1784 fprintf(STDERR
, " NOTE: Zlib compiled for max 64k, libpng not\n");
1786 /* I think the following can happen. */
1787 #if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1788 fprintf(STDERR
, " NOTE: libpng compiled for max 64k, zlib not\n");
1791 if (strcmp(png_libpng_ver
, PNG_LIBPNG_VER_STRING
))
1794 "Warning: versions are different between png.h and png.c\n");
1795 fprintf(STDERR
, " png.h version: %s\n", PNG_LIBPNG_VER_STRING
);
1796 fprintf(STDERR
, " png.c version: %s\n\n", png_libpng_ver
);
1802 if (strcmp(argv
[1], "-m") == 0)
1805 status_dots_requested
= 0;
1808 else if (strcmp(argv
[1], "-mv") == 0 ||
1809 strcmp(argv
[1], "-vm") == 0 )
1813 status_dots_requested
= 1;
1816 else if (strcmp(argv
[1], "-v") == 0)
1819 status_dots_requested
= 1;
1823 else if (strcmp(argv
[1], "--strict") == 0)
1825 status_dots_requested
= 0;
1832 else if (strcmp(argv
[1], "--relaxed") == 0)
1834 status_dots_requested
= 0;
1844 status_dots_requested
= 0;
1848 if (multiple
== 0 && argc
== 3 + verbose
)
1849 outname
= argv
[2 + verbose
];
1851 if ((multiple
== 0 && argc
> 3 + verbose
) ||
1852 (multiple
!= 0 && argc
< 2))
1855 "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
1858 " reads/writes one PNG file (without -m) or multiple files (-m)\n");
1860 " with -m %s is used as a temporary file\n", outname
);
1867 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1868 int allocation_now
= current_allocation
;
1870 for (i
=2; i
<argc
; ++i
)
1873 fprintf(STDERR
, "\n Testing %s:", argv
[i
]);
1875 fprintf(STDERR
, "\n");
1877 kerror
= test_one_file(argv
[i
], outname
);
1880 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1881 fprintf(STDERR
, "\n PASS (%lu zero samples)\n",
1882 (unsigned long)zero_samples
);
1884 fprintf(STDERR
, " PASS\n");
1886 #ifdef PNG_TIME_RFC1123_SUPPORTED
1887 if (tIME_chunk_present
!= 0)
1888 fprintf(STDERR
, " tIME = %s\n", tIME_string
);
1890 tIME_chunk_present
= 0;
1891 #endif /* TIME_RFC1123 */
1896 fprintf(STDERR
, " FAIL\n");
1899 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1900 if (allocation_now
!= current_allocation
)
1901 fprintf(STDERR
, "MEMORY ERROR: %d bytes lost\n",
1902 current_allocation
- allocation_now
);
1904 if (current_allocation
!= 0)
1906 memory_infop pinfo
= pinformation
;
1908 fprintf(STDERR
, "MEMORY ERROR: %d bytes still allocated\n",
1909 current_allocation
);
1911 while (pinfo
!= NULL
)
1913 fprintf(STDERR
, " %lu bytes at %p\n",
1914 (unsigned long)pinfo
->size
,
1916 pinfo
= pinfo
->next
;
1921 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1922 fprintf(STDERR
, " Current memory allocation: %10d bytes\n",
1923 current_allocation
);
1924 fprintf(STDERR
, " Maximum memory allocation: %10d bytes\n",
1925 maximum_allocation
);
1926 fprintf(STDERR
, " Total memory allocation: %10d bytes\n",
1928 fprintf(STDERR
, " Number of allocations: %10d\n",
1936 for (i
= 0; i
<3; ++i
)
1939 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1940 int allocation_now
= current_allocation
;
1943 status_dots_requested
= 1;
1945 else if (verbose
== 0)
1946 status_dots_requested
= 0;
1948 if (i
== 0 || verbose
== 1 || ierror
!= 0)
1950 fprintf(STDERR
, "\n Testing %s:", inname
);
1952 fprintf(STDERR
, "\n");
1956 kerror
= test_one_file(inname
, outname
);
1960 if (verbose
== 1 || i
== 2)
1962 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1963 fprintf(STDERR
, "\n PASS (%lu zero samples)\n",
1964 (unsigned long)zero_samples
);
1966 fprintf(STDERR
, " PASS\n");
1968 #ifdef PNG_TIME_RFC1123_SUPPORTED
1969 if (tIME_chunk_present
!= 0)
1970 fprintf(STDERR
, " tIME = %s\n", tIME_string
);
1971 #endif /* TIME_RFC1123 */
1977 if (verbose
== 0 && i
!= 2)
1979 fprintf(STDERR
, "\n Testing %s:", inname
);
1981 fprintf(STDERR
, "\n");
1985 fprintf(STDERR
, " FAIL\n");
1988 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1989 if (allocation_now
!= current_allocation
)
1990 fprintf(STDERR
, "MEMORY ERROR: %d bytes lost\n",
1991 current_allocation
- allocation_now
);
1993 if (current_allocation
!= 0)
1995 memory_infop pinfo
= pinformation
;
1997 fprintf(STDERR
, "MEMORY ERROR: %d bytes still allocated\n",
1998 current_allocation
);
2000 while (pinfo
!= NULL
)
2002 fprintf(STDERR
, " %lu bytes at %p\n",
2003 (unsigned long)pinfo
->size
, pinfo
->pointer
);
2004 pinfo
= pinfo
->next
;
2009 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2010 fprintf(STDERR
, " Current memory allocation: %10d bytes\n",
2011 current_allocation
);
2012 fprintf(STDERR
, " Maximum memory allocation: %10d bytes\n",
2013 maximum_allocation
);
2014 fprintf(STDERR
, " Total memory allocation: %10d bytes\n",
2016 fprintf(STDERR
, " Number of allocations: %10d\n",
2021 #ifdef PNGTEST_TIMING
2022 t_stop
= (float)clock();
2023 t_misc
+= (t_stop
- t_start
);
2025 fprintf(STDERR
, " CPU time used = %.3f seconds",
2026 (t_misc
+t_decode
+t_encode
)/(float)CLOCKS_PER_SEC
);
2027 fprintf(STDERR
, " (decoding %.3f,\n",
2028 t_decode
/(float)CLOCKS_PER_SEC
);
2029 fprintf(STDERR
, " encoding %.3f ,",
2030 t_encode
/(float)CLOCKS_PER_SEC
);
2031 fprintf(STDERR
, " other %.3f seconds)\n\n",
2032 t_misc
/(float)CLOCKS_PER_SEC
);
2036 fprintf(STDERR
, " libpng passes test\n");
2039 fprintf(STDERR
, " libpng FAILS test\n");
2041 dummy_ptr
= png_create_read_struct(PNG_LIBPNG_VER_STRING
, NULL
, NULL
, NULL
);
2042 fprintf(STDERR
, " Default limits:\n");
2043 fprintf(STDERR
, " width_max = %lu\n",
2044 (unsigned long) png_get_user_width_max(dummy_ptr
));
2045 fprintf(STDERR
, " height_max = %lu\n",
2046 (unsigned long) png_get_user_height_max(dummy_ptr
));
2047 if (png_get_chunk_cache_max(dummy_ptr
) == 0)
2048 fprintf(STDERR
, " cache_max = unlimited\n");
2050 fprintf(STDERR
, " cache_max = %lu\n",
2051 (unsigned long) png_get_chunk_cache_max(dummy_ptr
));
2052 if (png_get_chunk_malloc_max(dummy_ptr
) == 0)
2053 fprintf(STDERR
, " malloc_max = unlimited\n");
2055 fprintf(STDERR
, " malloc_max = %lu\n",
2056 (unsigned long) png_get_chunk_malloc_max(dummy_ptr
));
2057 png_destroy_read_struct(&dummy_ptr
, NULL
, NULL
);
2059 return (int)(ierror
!= 0);
2066 " test ignored because libpng was not built with read support\n");
2067 /* And skip this test */
2068 return PNG_LIBPNG_VER
< 10600 ? 0 : 77;
2072 /* Generate a compiler error if there is an old png.h in the search path. */
2073 typedef png_libpng_version_1_6_21 Your_png_h_is_not_version_1_6_21
;