2 /* pngtest.c - a simple test program to test libpng
4 * Copyright (c) 2018 Cosmin Truta
5 * Copyright (c) 1998-2002,2004,2006-2018 Glenn Randers-Pehrson
6 * Copyright (c) 1996-1997 Andreas Dilger
7 * 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 xfail
= 0;
148 static int unsupported_chunks
= 0; /* chunk unsupported by libpng in input */
149 static int error_count
= 0; /* count calls to png_error */
150 static int warning_count
= 0; /* count calls to png_warning */
152 /* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
154 # define png_jmpbuf(png_ptr) png_ptr->jmpbuf
157 /* Defines for unknown chunk handling if required. */
158 #ifndef PNG_HANDLE_CHUNK_ALWAYS
159 # define PNG_HANDLE_CHUNK_ALWAYS 3
161 #ifndef PNG_HANDLE_CHUNK_IF_SAFE
162 # define PNG_HANDLE_CHUNK_IF_SAFE 2
165 /* Utility to save typing/errors, the argument must be a name */
166 #define MEMZERO(var) ((void)memset(&var, 0, sizeof var))
168 /* Example of using row callbacks to make a simple progress meter */
169 static int status_pass
= 1;
170 static int status_dots_requested
= 0;
171 static int status_dots
= 1;
174 read_row_callback(png_structp png_ptr
, png_uint_32 row_number
, int pass
)
176 if (png_ptr
== NULL
|| row_number
> PNG_UINT_31_MAX
)
179 if (status_pass
!= pass
)
181 fprintf(stdout
, "\n Pass %d: ", pass
);
188 if (status_dots
== 0)
190 fprintf(stdout
, "\n ");
194 fprintf(stdout
, "r");
197 #ifdef PNG_WRITE_SUPPORTED
199 write_row_callback(png_structp png_ptr
, png_uint_32 row_number
, int pass
)
201 if (png_ptr
== NULL
|| row_number
> PNG_UINT_31_MAX
|| pass
> 7)
204 fprintf(stdout
, "w");
209 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
210 /* Example of using a user transform callback (doesn't do anything at present).
213 read_user_callback(png_structp png_ptr
, png_row_infop row_info
, png_bytep data
)
221 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
222 /* Example of using user transform callback (we don't transform anything,
223 * but merely count the zero samples)
226 static png_uint_32 zero_samples
;
229 count_zero_samples(png_structp png_ptr
, png_row_infop row_info
, png_bytep data
)
235 /* Contents of row_info:
236 * png_uint_32 width width of row
237 * png_uint_32 rowbytes number of bytes in row
238 * png_byte color_type color type of pixels
239 * png_byte bit_depth bit depth of samples
240 * png_byte channels number of channels (1-4)
241 * png_byte pixel_depth bits per pixel (depth*channels)
244 /* Counts the number of zero samples (or zero pixels if color_type is 3 */
246 if (row_info
->color_type
== 0 || row_info
->color_type
== 3)
249 png_uint_32 n
, nstop
;
251 for (n
= 0, nstop
=row_info
->width
; n
<nstop
; n
++)
253 if (row_info
->bit_depth
== 1)
255 if (((*dp
<< pos
++ ) & 0x80) == 0)
265 if (row_info
->bit_depth
== 2)
267 if (((*dp
<< (pos
+=2)) & 0xc0) == 0)
277 if (row_info
->bit_depth
== 4)
279 if (((*dp
<< (pos
+=4)) & 0xf0) == 0)
289 if (row_info
->bit_depth
== 8)
293 if (row_info
->bit_depth
== 16)
295 if ((*dp
| *(dp
+1)) == 0)
301 else /* Other color types */
303 png_uint_32 n
, nstop
;
305 int color_channels
= row_info
->channels
;
306 if (row_info
->color_type
> 3)
309 for (n
= 0, nstop
=row_info
->width
; n
<nstop
; n
++)
311 for (channel
= 0; channel
< color_channels
; channel
++)
313 if (row_info
->bit_depth
== 8)
317 if (row_info
->bit_depth
== 16)
319 if ((*dp
| *(dp
+1)) == 0)
325 if (row_info
->color_type
> 3)
328 if (row_info
->bit_depth
== 16)
334 #endif /* WRITE_USER_TRANSFORM */
336 #ifndef PNG_STDIO_SUPPORTED
337 /* START of code to validate stdio-free compilation */
338 /* These copies of the default read/write functions come from pngrio.c and
339 * pngwio.c. They allow "don't include stdio" testing of the library.
340 * This is the function that does the actual reading of data. If you are
341 * not reading from a standard C stream, you should create a replacement
342 * read_data function and use it at run time with png_set_read_fn(), rather
343 * than changing the library.
346 #ifdef PNG_IO_STATE_SUPPORTED
348 pngtest_check_io_state(png_structp png_ptr
, size_t data_length
,
351 pngtest_check_io_state(png_structp png_ptr
, size_t data_length
,
354 png_uint_32 io_state
= png_get_io_state(png_ptr
);
357 /* Check if the current operation (reading / writing) is as expected. */
358 if ((io_state
& PNG_IO_MASK_OP
) != io_op
)
359 png_error(png_ptr
, "Incorrect operation in I/O state");
361 /* Check if the buffer size specific to the current location
362 * (file signature / header / data / crc) is as expected.
364 switch (io_state
& PNG_IO_MASK_LOC
)
366 case PNG_IO_SIGNATURE
:
370 case PNG_IO_CHUNK_HDR
:
371 if (data_length
!= 8)
374 case PNG_IO_CHUNK_DATA
:
375 break; /* no restrictions here */
376 case PNG_IO_CHUNK_CRC
:
377 if (data_length
!= 4)
381 err
= 1; /* uninitialized */
384 png_error(png_ptr
, "Bad I/O state or buffer size");
389 pngtest_read_data(png_structp png_ptr
, png_bytep data
, size_t length
)
394 /* fread() returns 0 on error, so it is OK to store this in a size_t
395 * instead of an int, which is what fread() actually returns.
397 io_ptr
= png_get_io_ptr(png_ptr
);
400 check
= fread(data
, 1, length
, (png_FILE_p
)io_ptr
);
405 png_error(png_ptr
, "Read Error");
408 #ifdef PNG_IO_STATE_SUPPORTED
409 pngtest_check_io_state(png_ptr
, length
, PNG_IO_READING
);
413 #ifdef PNG_WRITE_FLUSH_SUPPORTED
415 pngtest_flush(png_structp png_ptr
)
417 /* Do nothing; fflush() is said to be just a waste of energy. */
418 PNG_UNUSED(png_ptr
) /* Stifle compiler warning */
422 /* This is the function that does the actual writing of data. If you are
423 * not writing to a standard C stream, you should create a replacement
424 * write_data function and use it at run time with png_set_write_fn(), rather
425 * than changing the library.
428 pngtest_write_data(png_structp png_ptr
, png_bytep data
, size_t length
)
432 check
= fwrite(data
, 1, length
, (png_FILE_p
)png_get_io_ptr(png_ptr
));
436 png_error(png_ptr
, "Write Error");
439 #ifdef PNG_IO_STATE_SUPPORTED
440 pngtest_check_io_state(png_ptr
, length
, PNG_IO_WRITING
);
445 /* This function is called when there is a warning, but the library thinks
446 * it can continue anyway. Replacement functions don't have to do anything
447 * here if you don't want to. In the default configuration, png_ptr is
448 * not used, but it is passed in case it may be useful.
452 const char *file_name
;
453 } pngtest_error_parameters
;
456 pngtest_warning(png_structp png_ptr
, png_const_charp message
)
458 const char *name
= "UNKNOWN (ERROR!)";
459 pngtest_error_parameters
*test
=
460 (pngtest_error_parameters
*)png_get_error_ptr(png_ptr
);
464 if (test
!= NULL
&& test
->file_name
!= NULL
)
465 name
= test
->file_name
;
467 fprintf(STDERR
, "\n%s: libpng warning: %s\n", name
, message
);
470 /* This is the default error handling function. Note that replacements for
471 * this function MUST NOT RETURN, or the program will likely crash. This
472 * function is used by default, or if the program supplies NULL for the
473 * error function pointer in png_set_error_fn().
476 pngtest_error(png_structp png_ptr
, png_const_charp message
)
480 pngtest_warning(png_ptr
, message
);
481 /* We can return because png_error calls the default handler, which is
482 * actually OK in this case.
486 /* END of code to validate stdio-free compilation */
488 /* START of code to validate memory allocation and deallocation */
489 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
491 /* Allocate memory. For reasonable files, size should never exceed
492 * 64K. However, zlib may allocate more than 64K if you don't tell
493 * it not to. See zconf.h and png.h for more information. zlib does
494 * need to allocate exactly 64K, so whatever you call here must
495 * have the ability to do that.
497 * This piece of code can be compiled to validate max 64K allocations
498 * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K.
500 typedef struct memory_information
502 png_alloc_size_t size
;
504 struct memory_information
*next
;
505 } memory_information
;
506 typedef memory_information
*memory_infop
;
508 static memory_infop pinformation
= NULL
;
509 static int current_allocation
= 0;
510 static int maximum_allocation
= 0;
511 static int total_allocation
= 0;
512 static int num_allocations
= 0;
514 png_voidp PNGCBAPI png_debug_malloc
PNGARG((png_structp png_ptr
,
515 png_alloc_size_t size
));
516 void PNGCBAPI png_debug_free
PNGARG((png_structp png_ptr
, png_voidp ptr
));
519 PNGCBAPI
png_debug_malloc(png_structp png_ptr
, png_alloc_size_t size
)
522 /* png_malloc has already tested for NULL; png_create_struct calls
523 * png_debug_malloc directly, with png_ptr == NULL which is OK
529 /* This calls the library allocator twice, once to get the requested
530 buffer and once to get a new free list entry. */
532 /* Disable malloc_fn and free_fn */
534 png_set_mem_fn(png_ptr
, NULL
, NULL
, NULL
);
535 pinfo
= (memory_infop
)png_malloc(png_ptr
,
538 current_allocation
+= size
;
539 total_allocation
+= size
;
542 if (current_allocation
> maximum_allocation
)
543 maximum_allocation
= current_allocation
;
545 pinfo
->pointer
= png_malloc(png_ptr
, size
);
546 /* Restore malloc_fn and free_fn */
548 png_set_mem_fn(png_ptr
,
549 NULL
, png_debug_malloc
, png_debug_free
);
551 if (size
!= 0 && pinfo
->pointer
== NULL
)
553 current_allocation
-= size
;
554 total_allocation
-= size
;
556 "out of memory in pngtest->png_debug_malloc");
559 pinfo
->next
= pinformation
;
560 pinformation
= pinfo
;
561 /* Make sure the caller isn't assuming zeroed memory. */
562 memset(pinfo
->pointer
, 0xdd, pinfo
->size
);
565 printf("png_malloc %lu bytes at %p\n", (unsigned long)size
,
568 return (png_voidp
)(pinfo
->pointer
);
572 /* Free a pointer. It is removed from the list at the same time. */
574 png_debug_free(png_structp png_ptr
, png_voidp ptr
)
577 fprintf(STDERR
, "NULL pointer to png_debug_free.\n");
581 #if 0 /* This happens all the time. */
582 fprintf(STDERR
, "WARNING: freeing NULL pointer\n");
587 /* Unlink the element from the list. */
588 if (pinformation
!= NULL
)
590 memory_infop
*ppinfo
= &pinformation
;
594 memory_infop pinfo
= *ppinfo
;
596 if (pinfo
->pointer
== ptr
)
598 *ppinfo
= pinfo
->next
;
599 current_allocation
-= pinfo
->size
;
600 if (current_allocation
< 0)
601 fprintf(STDERR
, "Duplicate free of memory\n");
602 /* We must free the list element too, but first kill
603 the memory that is to be freed. */
604 memset(ptr
, 0x55, pinfo
->size
);
610 if (pinfo
->next
== NULL
)
612 fprintf(STDERR
, "Pointer %p not found\n", ptr
);
616 ppinfo
= &pinfo
->next
;
620 /* Finally free the data. */
622 printf("Freeing %p\n", ptr
);
628 #endif /* USER_MEM && DEBUG */
629 /* END of code to test memory allocation/deallocation */
632 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
633 /* Demonstration of user chunk support of the sTER and vpAg chunks */
635 /* (sTER is a public chunk not yet known by libpng. vpAg is a private
636 chunk used in ImageMagick to store "virtual page" size). */
638 static struct user_chunk_data
640 png_const_infop info_ptr
;
641 png_uint_32 vpAg_width
, vpAg_height
;
648 /* Used for location and order; zero means nothing. */
649 #define have_sTER 0x01
650 #define have_vpAg 0x02
651 #define before_PLTE 0x10
652 #define before_IDAT 0x20
653 #define after_IDAT 0x40
656 init_callback_info(png_const_infop info_ptr
)
658 MEMZERO(user_chunk_data
);
659 user_chunk_data
.info_ptr
= info_ptr
;
663 set_location(png_structp png_ptr
, struct user_chunk_data
*data
, int what
)
667 if ((data
->location
[0] & what
) != 0 || (data
->location
[1] & what
) != 0)
668 return 0; /* already have one of these */
670 /* Find where we are (the code below zeroes info_ptr to indicate that the
671 * chunks before the first IDAT have been read.)
673 if (data
->info_ptr
== NULL
) /* after IDAT */
674 location
= what
| after_IDAT
;
676 else if (png_get_valid(png_ptr
, data
->info_ptr
, PNG_INFO_PLTE
) != 0)
677 location
= what
| before_IDAT
;
680 location
= what
| before_PLTE
;
682 if (data
->location
[0] == 0)
683 data
->location
[0] = location
;
686 data
->location
[1] = location
;
688 return 1; /* handled */
692 read_user_chunk_callback(png_struct
*png_ptr
, png_unknown_chunkp chunk
)
694 struct user_chunk_data
*my_user_chunk_data
=
695 (struct user_chunk_data
*)png_get_user_chunk_ptr(png_ptr
);
697 if (my_user_chunk_data
== NULL
)
698 png_error(png_ptr
, "lost user chunk pointer");
700 /* Return one of the following:
701 * return (-n); chunk had an error
702 * return (0); did not recognize
703 * return (n); success
705 * The unknown chunk structure contains the chunk data:
710 * Note that libpng has already taken care of the CRC handling.
713 if (chunk
->name
[0] == 115 && chunk
->name
[1] == 84 && /* s T */
714 chunk
->name
[2] == 69 && chunk
->name
[3] == 82) /* E R */
716 /* Found sTER chunk */
717 if (chunk
->size
!= 1)
718 return (-1); /* Error return */
720 if (chunk
->data
[0] != 0 && chunk
->data
[0] != 1)
721 return (-1); /* Invalid mode */
723 if (set_location(png_ptr
, my_user_chunk_data
, have_sTER
) != 0)
725 my_user_chunk_data
->sTER_mode
=chunk
->data
[0];
730 return (0); /* duplicate sTER - give it to libpng */
733 if (chunk
->name
[0] != 118 || chunk
->name
[1] != 112 || /* v p */
734 chunk
->name
[2] != 65 || chunk
->name
[3] != 103) /* A g */
735 return (0); /* Did not recognize */
737 /* Found ImageMagick vpAg chunk */
739 if (chunk
->size
!= 9)
740 return (-1); /* Error return */
742 if (set_location(png_ptr
, my_user_chunk_data
, have_vpAg
) == 0)
743 return (0); /* duplicate vpAg */
745 my_user_chunk_data
->vpAg_width
= png_get_uint_31(png_ptr
, chunk
->data
);
746 my_user_chunk_data
->vpAg_height
= png_get_uint_31(png_ptr
, chunk
->data
+ 4);
747 my_user_chunk_data
->vpAg_units
= chunk
->data
[8];
752 #ifdef PNG_WRITE_SUPPORTED
754 write_sTER_chunk(png_structp write_ptr
)
756 png_byte sTER
[5] = {115, 84, 69, 82, '\0'};
759 fprintf(STDERR
, "\n stereo mode = %d\n", user_chunk_data
.sTER_mode
);
761 png_write_chunk(write_ptr
, sTER
, &user_chunk_data
.sTER_mode
, 1);
765 write_vpAg_chunk(png_structp write_ptr
)
767 png_byte vpAg
[5] = {118, 112, 65, 103, '\0'};
769 png_byte vpag_chunk_data
[9];
772 fprintf(STDERR
, " vpAg = %lu x %lu, units = %d\n",
773 (unsigned long)user_chunk_data
.vpAg_width
,
774 (unsigned long)user_chunk_data
.vpAg_height
,
775 user_chunk_data
.vpAg_units
);
777 png_save_uint_32(vpag_chunk_data
, user_chunk_data
.vpAg_width
);
778 png_save_uint_32(vpag_chunk_data
+ 4, user_chunk_data
.vpAg_height
);
779 vpag_chunk_data
[8] = user_chunk_data
.vpAg_units
;
780 png_write_chunk(write_ptr
, vpAg
, vpag_chunk_data
, 9);
784 write_chunks(png_structp write_ptr
, int location
)
788 /* Notice that this preserves the original chunk order, however chunks
789 * intercepted by the callback will be written *after* chunks passed to
790 * libpng. This will actually reverse a pair of sTER chunks or a pair of
791 * vpAg chunks, resulting in an error later. This is not worth worrying
792 * about - the chunks should not be duplicated!
796 if (user_chunk_data
.location
[i
] == (location
| have_sTER
))
797 write_sTER_chunk(write_ptr
);
799 else if (user_chunk_data
.location
[i
] == (location
| have_vpAg
))
800 write_vpAg_chunk(write_ptr
);
804 #else /* !READ_USER_CHUNKS */
805 # define write_chunks(pp,loc) ((void)0)
807 /* END of code to demonstrate user chunk support */
809 /* START of code to check that libpng has the required text support; this only
810 * checks for the write support because if read support is missing the chunk
811 * will simply not be reported back to pngtest.
813 #ifdef PNG_TEXT_SUPPORTED
815 pngtest_check_text_support(png_structp png_ptr
, png_textp text_ptr
,
820 switch (text_ptr
[--num_text
].compression
)
822 case PNG_TEXT_COMPRESSION_NONE
:
825 case PNG_TEXT_COMPRESSION_zTXt
:
826 # ifndef PNG_WRITE_zTXt_SUPPORTED
827 ++unsupported_chunks
;
828 /* In libpng 1.7 this now does an app-error, so stop it: */
829 text_ptr
[num_text
].compression
= PNG_TEXT_COMPRESSION_NONE
;
833 case PNG_ITXT_COMPRESSION_NONE
:
834 case PNG_ITXT_COMPRESSION_zTXt
:
835 # ifndef PNG_WRITE_iTXt_SUPPORTED
836 ++unsupported_chunks
;
837 text_ptr
[num_text
].compression
= PNG_TEXT_COMPRESSION_NONE
;
842 /* This is an error */
843 png_error(png_ptr
, "invalid text chunk compression field");
849 /* END of code to check that libpng has the required text support */
853 test_one_file(const char *inname
, const char *outname
)
855 static png_FILE_p fpin
;
856 static png_FILE_p fpout
; /* "static" prevents setjmp corruption */
857 pngtest_error_parameters error_parameters
;
858 png_structp read_ptr
;
859 png_infop read_info_ptr
, end_info_ptr
;
860 #ifdef PNG_WRITE_SUPPORTED
861 png_structp write_ptr
;
862 png_infop write_info_ptr
;
863 png_infop write_end_info_ptr
;
864 #ifdef PNG_WRITE_FILTER_SUPPORTED
865 int interlace_preserved
= 1;
866 #endif /* WRITE_FILTER */
868 png_structp write_ptr
= NULL
;
869 png_infop write_info_ptr
= NULL
;
870 png_infop write_end_info_ptr
= NULL
;
874 png_uint_32 width
, height
;
875 volatile int num_passes
;
877 int bit_depth
, color_type
;
880 error_parameters
.file_name
= inname
;
882 if ((fpin
= fopen(inname
, "rb")) == NULL
)
884 fprintf(STDERR
, "Could not find input file %s\n", inname
);
888 if ((fpout
= fopen(outname
, "wb")) == NULL
)
890 fprintf(STDERR
, "Could not open output file %s\n", outname
);
895 pngtest_debug("Allocating read and write structures");
896 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
898 png_create_read_struct_2(PNG_LIBPNG_VER_STRING
, NULL
,
899 NULL
, NULL
, NULL
, png_debug_malloc
, png_debug_free
);
902 png_create_read_struct(PNG_LIBPNG_VER_STRING
, NULL
, NULL
, NULL
);
904 png_set_error_fn(read_ptr
, &error_parameters
, pngtest_error
,
907 #ifdef PNG_WRITE_SUPPORTED
908 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
910 png_create_write_struct_2(PNG_LIBPNG_VER_STRING
, NULL
,
911 NULL
, NULL
, NULL
, png_debug_malloc
, png_debug_free
);
914 png_create_write_struct(PNG_LIBPNG_VER_STRING
, NULL
, NULL
, NULL
);
916 png_set_error_fn(write_ptr
, &error_parameters
, pngtest_error
,
919 pngtest_debug("Allocating read_info, write_info and end_info structures");
920 read_info_ptr
= png_create_info_struct(read_ptr
);
921 end_info_ptr
= png_create_info_struct(read_ptr
);
922 #ifdef PNG_WRITE_SUPPORTED
923 write_info_ptr
= png_create_info_struct(write_ptr
);
924 write_end_info_ptr
= png_create_info_struct(write_ptr
);
927 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
928 init_callback_info(read_info_ptr
);
929 png_set_read_user_chunk_fn(read_ptr
, &user_chunk_data
,
930 read_user_chunk_callback
);
933 #ifdef PNG_SETJMP_SUPPORTED
934 pngtest_debug("Setting jmpbuf for read struct");
935 if (setjmp(png_jmpbuf(read_ptr
)))
937 fprintf(STDERR
, "%s -> %s: libpng read error\n", inname
, outname
);
938 png_free(read_ptr
, row_buf
);
941 fprintf(STDERR
, " destroy read structs\n");
942 png_destroy_read_struct(&read_ptr
, &read_info_ptr
, &end_info_ptr
);
943 #ifdef PNG_WRITE_SUPPORTED
945 fprintf(STDERR
, " destroy write structs\n");
946 png_destroy_info_struct(write_ptr
, &write_end_info_ptr
);
947 png_destroy_write_struct(&write_ptr
, &write_info_ptr
);
954 #ifdef PNG_WRITE_SUPPORTED
955 pngtest_debug("Setting jmpbuf for write struct");
957 if (setjmp(png_jmpbuf(write_ptr
)))
959 fprintf(STDERR
, "%s -> %s: libpng write error\n", inname
, outname
);
961 fprintf(STDERR
, " destroying read structs\n");
962 png_destroy_read_struct(&read_ptr
, &read_info_ptr
, &end_info_ptr
);
964 fprintf(STDERR
, " destroying write structs\n");
965 png_destroy_info_struct(write_ptr
, &write_end_info_ptr
);
966 png_destroy_write_struct(&write_ptr
, &write_info_ptr
);
974 #ifdef PNG_BENIGN_ERRORS_SUPPORTED
977 /* Treat png_benign_error() as errors on read */
978 png_set_benign_errors(read_ptr
, 0);
980 # ifdef PNG_WRITE_SUPPORTED
981 /* Treat them as errors on write */
982 png_set_benign_errors(write_ptr
, 0);
985 /* if strict is not set, then app warnings and errors are treated as
986 * warnings in release builds, but not in unstable builds; this can be
987 * changed with '--relaxed'.
991 else if (relaxed
!= 0)
993 /* Allow application (pngtest) errors and warnings to pass */
994 png_set_benign_errors(read_ptr
, 1);
996 /* Turn off CRC checking while reading */
997 png_set_crc_action(read_ptr
, PNG_CRC_QUIET_USE
, PNG_CRC_QUIET_USE
);
999 #ifdef PNG_IGNORE_ADLER32
1000 /* Turn off ADLER32 checking while reading */
1001 png_set_option(read_ptr
, PNG_IGNORE_ADLER32
, PNG_OPTION_ON
);
1004 # ifdef PNG_WRITE_SUPPORTED
1005 png_set_benign_errors(write_ptr
, 1);
1009 #endif /* BENIGN_ERRORS */
1011 pngtest_debug("Initializing input and output streams");
1012 #ifdef PNG_STDIO_SUPPORTED
1013 png_init_io(read_ptr
, fpin
);
1014 # ifdef PNG_WRITE_SUPPORTED
1015 png_init_io(write_ptr
, fpout
);
1018 png_set_read_fn(read_ptr
, (png_voidp
)fpin
, pngtest_read_data
);
1019 # ifdef PNG_WRITE_SUPPORTED
1020 png_set_write_fn(write_ptr
, (png_voidp
)fpout
, pngtest_write_data
,
1021 # ifdef PNG_WRITE_FLUSH_SUPPORTED
1029 if (status_dots_requested
== 1)
1031 #ifdef PNG_WRITE_SUPPORTED
1032 png_set_write_status_fn(write_ptr
, write_row_callback
);
1034 png_set_read_status_fn(read_ptr
, read_row_callback
);
1039 #ifdef PNG_WRITE_SUPPORTED
1040 png_set_write_status_fn(write_ptr
, NULL
);
1042 png_set_read_status_fn(read_ptr
, NULL
);
1045 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1046 png_set_read_user_transform_fn(read_ptr
, read_user_callback
);
1048 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1050 png_set_write_user_transform_fn(write_ptr
, count_zero_samples
);
1053 #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
1054 /* Preserve all the unknown chunks, if possible. If this is disabled then,
1055 * even if the png_{get,set}_unknown_chunks stuff is enabled, we can't use
1056 * libpng to *save* the unknown chunks on read (because we can't switch the
1059 * Notice that if SET_UNKNOWN_CHUNKS is *not* supported read will discard all
1060 * unknown chunks and write will write them all.
1062 #ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
1063 png_set_keep_unknown_chunks(read_ptr
, PNG_HANDLE_CHUNK_ALWAYS
,
1066 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1067 png_set_keep_unknown_chunks(write_ptr
, PNG_HANDLE_CHUNK_ALWAYS
,
1072 pngtest_debug("Reading info struct");
1073 png_read_info(read_ptr
, read_info_ptr
);
1075 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1076 /* This is a bit of a hack; there is no obvious way in the callback function
1077 * to determine that the chunks before the first IDAT have been read, so
1078 * remove the info_ptr (which is only used to determine position relative to
1079 * PLTE) here to indicate that we are after the IDAT.
1081 user_chunk_data
.info_ptr
= NULL
;
1084 pngtest_debug("Transferring info struct");
1086 int interlace_type
, compression_type
, filter_type
;
1088 if (png_get_IHDR(read_ptr
, read_info_ptr
, &width
, &height
, &bit_depth
,
1089 &color_type
, &interlace_type
, &compression_type
, &filter_type
) != 0)
1091 png_set_IHDR(write_ptr
, write_info_ptr
, width
, height
, bit_depth
,
1092 color_type
, interlace_type
, compression_type
, filter_type
);
1093 /* num_passes may not be available below if interlace support is not
1094 * provided by libpng for both read and write.
1096 switch (interlace_type
)
1098 case PNG_INTERLACE_NONE
:
1102 case PNG_INTERLACE_ADAM7
:
1107 png_error(read_ptr
, "invalid interlace type");
1113 png_error(read_ptr
, "png_get_IHDR failed");
1115 #ifdef PNG_FIXED_POINT_SUPPORTED
1116 #ifdef PNG_cHRM_SUPPORTED
1118 png_fixed_point white_x
, white_y
, red_x
, red_y
, green_x
, green_y
, blue_x
,
1121 if (png_get_cHRM_fixed(read_ptr
, read_info_ptr
, &white_x
, &white_y
,
1122 &red_x
, &red_y
, &green_x
, &green_y
, &blue_x
, &blue_y
) != 0)
1124 png_set_cHRM_fixed(write_ptr
, write_info_ptr
, white_x
, white_y
, red_x
,
1125 red_y
, green_x
, green_y
, blue_x
, blue_y
);
1129 #ifdef PNG_gAMA_SUPPORTED
1131 png_fixed_point gamma
;
1133 if (png_get_gAMA_fixed(read_ptr
, read_info_ptr
, &gamma
) != 0)
1134 png_set_gAMA_fixed(write_ptr
, write_info_ptr
, gamma
);
1137 #else /* Use floating point versions */
1138 #ifdef PNG_FLOATING_POINT_SUPPORTED
1139 #ifdef PNG_cHRM_SUPPORTED
1141 double white_x
, white_y
, red_x
, red_y
, green_x
, green_y
, blue_x
,
1144 if (png_get_cHRM(read_ptr
, read_info_ptr
, &white_x
, &white_y
, &red_x
,
1145 &red_y
, &green_x
, &green_y
, &blue_x
, &blue_y
) != 0)
1147 png_set_cHRM(write_ptr
, write_info_ptr
, white_x
, white_y
, red_x
,
1148 red_y
, green_x
, green_y
, blue_x
, blue_y
);
1152 #ifdef PNG_gAMA_SUPPORTED
1156 if (png_get_gAMA(read_ptr
, read_info_ptr
, &gamma
) != 0)
1157 png_set_gAMA(write_ptr
, write_info_ptr
, gamma
);
1160 #endif /* Floating point */
1161 #endif /* Fixed point */
1162 #ifdef PNG_iCCP_SUPPORTED
1166 png_uint_32 proflen
;
1167 int compression_type
;
1169 if (png_get_iCCP(read_ptr
, read_info_ptr
, &name
, &compression_type
,
1170 &profile
, &proflen
) != 0)
1172 png_set_iCCP(write_ptr
, write_info_ptr
, name
, compression_type
,
1177 #ifdef PNG_sRGB_SUPPORTED
1181 if (png_get_sRGB(read_ptr
, read_info_ptr
, &intent
) != 0)
1182 png_set_sRGB(write_ptr
, write_info_ptr
, intent
);
1189 if (png_get_PLTE(read_ptr
, read_info_ptr
, &palette
, &num_palette
) != 0)
1190 png_set_PLTE(write_ptr
, write_info_ptr
, palette
, num_palette
);
1192 #ifdef PNG_bKGD_SUPPORTED
1194 png_color_16p background
;
1196 if (png_get_bKGD(read_ptr
, read_info_ptr
, &background
) != 0)
1198 png_set_bKGD(write_ptr
, write_info_ptr
, background
);
1202 #ifdef PNG_READ_eXIf_SUPPORTED
1204 png_bytep exif
=NULL
;
1205 png_uint_32 exif_length
;
1207 if (png_get_eXIf_1(read_ptr
, read_info_ptr
, &exif_length
, &exif
) != 0)
1209 if (exif_length
> 1)
1210 fprintf(STDERR
," eXIf type %c%c, %lu bytes\n",exif
[0],exif
[1],
1211 (unsigned long)exif_length
);
1212 # ifdef PNG_WRITE_eXIf_SUPPORTED
1213 png_set_eXIf_1(write_ptr
, write_info_ptr
, exif_length
, exif
);
1218 #ifdef PNG_hIST_SUPPORTED
1222 if (png_get_hIST(read_ptr
, read_info_ptr
, &hist
) != 0)
1223 png_set_hIST(write_ptr
, write_info_ptr
, hist
);
1226 #ifdef PNG_oFFs_SUPPORTED
1228 png_int_32 offset_x
, offset_y
;
1231 if (png_get_oFFs(read_ptr
, read_info_ptr
, &offset_x
, &offset_y
,
1234 png_set_oFFs(write_ptr
, write_info_ptr
, offset_x
, offset_y
, unit_type
);
1238 #ifdef PNG_pCAL_SUPPORTED
1240 png_charp purpose
, units
;
1245 if (png_get_pCAL(read_ptr
, read_info_ptr
, &purpose
, &X0
, &X1
, &type
,
1246 &nparams
, &units
, ¶ms
) != 0)
1248 png_set_pCAL(write_ptr
, write_info_ptr
, purpose
, X0
, X1
, type
,
1249 nparams
, units
, params
);
1253 #ifdef PNG_pHYs_SUPPORTED
1255 png_uint_32 res_x
, res_y
;
1258 if (png_get_pHYs(read_ptr
, read_info_ptr
, &res_x
, &res_y
,
1260 png_set_pHYs(write_ptr
, write_info_ptr
, res_x
, res_y
, unit_type
);
1263 #ifdef PNG_sBIT_SUPPORTED
1265 png_color_8p sig_bit
;
1267 if (png_get_sBIT(read_ptr
, read_info_ptr
, &sig_bit
) != 0)
1268 png_set_sBIT(write_ptr
, write_info_ptr
, sig_bit
);
1271 #ifdef PNG_sCAL_SUPPORTED
1272 #if defined(PNG_FLOATING_POINT_SUPPORTED) && \
1273 defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
1276 double scal_width
, scal_height
;
1278 if (png_get_sCAL(read_ptr
, read_info_ptr
, &unit
, &scal_width
,
1281 png_set_sCAL(write_ptr
, write_info_ptr
, unit
, scal_width
, scal_height
);
1285 #ifdef PNG_FIXED_POINT_SUPPORTED
1288 png_charp scal_width
, scal_height
;
1290 if (png_get_sCAL_s(read_ptr
, read_info_ptr
, &unit
, &scal_width
,
1293 png_set_sCAL_s(write_ptr
, write_info_ptr
, unit
, scal_width
,
1301 #ifdef PNG_sPLT_SUPPORTED
1303 png_sPLT_tp entries
;
1305 int num_entries
= (int) png_get_sPLT(read_ptr
, read_info_ptr
, &entries
);
1308 png_set_sPLT(write_ptr
, write_info_ptr
, entries
, num_entries
);
1313 #ifdef PNG_TEXT_SUPPORTED
1318 if (png_get_text(read_ptr
, read_info_ptr
, &text_ptr
, &num_text
) > 0)
1320 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text
);
1322 pngtest_check_text_support(read_ptr
, text_ptr
, num_text
);
1328 fprintf(STDERR
,"\n");
1329 for (i
=0; i
<num_text
; i
++)
1331 fprintf(STDERR
," Text compression[%d]=%d\n",
1332 i
, text_ptr
[i
].compression
);
1336 png_set_text(write_ptr
, write_info_ptr
, text_ptr
, num_text
);
1340 #ifdef PNG_tIME_SUPPORTED
1344 if (png_get_tIME(read_ptr
, read_info_ptr
, &mod_time
) != 0)
1346 png_set_tIME(write_ptr
, write_info_ptr
, mod_time
);
1347 #ifdef PNG_TIME_RFC1123_SUPPORTED
1348 if (png_convert_to_rfc1123_buffer(tIME_string
, mod_time
) != 0)
1349 tIME_string
[(sizeof tIME_string
) - 1] = '\0';
1353 strncpy(tIME_string
, "*** invalid time ***", (sizeof tIME_string
));
1354 tIME_string
[(sizeof tIME_string
) - 1] = '\0';
1357 tIME_chunk_present
++;
1358 #endif /* TIME_RFC1123 */
1362 #ifdef PNG_tRNS_SUPPORTED
1364 png_bytep trans_alpha
;
1366 png_color_16p trans_color
;
1368 if (png_get_tRNS(read_ptr
, read_info_ptr
, &trans_alpha
, &num_trans
,
1371 int sample_max
= (1 << bit_depth
);
1372 /* libpng doesn't reject a tRNS chunk with out-of-range samples */
1373 if (!((color_type
== PNG_COLOR_TYPE_GRAY
&&
1374 (int)trans_color
->gray
> sample_max
) ||
1375 (color_type
== PNG_COLOR_TYPE_RGB
&&
1376 ((int)trans_color
->red
> sample_max
||
1377 (int)trans_color
->green
> sample_max
||
1378 (int)trans_color
->blue
> sample_max
))))
1379 png_set_tRNS(write_ptr
, write_info_ptr
, trans_alpha
, num_trans
,
1384 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1386 png_unknown_chunkp unknowns
;
1387 int num_unknowns
= png_get_unknown_chunks(read_ptr
, read_info_ptr
,
1390 if (num_unknowns
!= 0)
1392 png_set_unknown_chunks(write_ptr
, write_info_ptr
, unknowns
,
1394 #if PNG_LIBPNG_VER < 10600
1395 /* Copy the locations from the read_info_ptr. The automatically
1396 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1397 * because they are reset from the write pointer (removed in 1.6.0).
1401 for (i
= 0; i
< num_unknowns
; i
++)
1402 png_set_unknown_chunk_location(write_ptr
, write_info_ptr
, i
,
1403 unknowns
[i
].location
);
1410 #ifdef PNG_WRITE_SUPPORTED
1411 pngtest_debug("Writing info struct");
1413 /* Write the info in two steps so that if we write the 'unknown' chunks here
1414 * they go to the correct place.
1416 png_write_info_before_PLTE(write_ptr
, write_info_ptr
);
1418 write_chunks(write_ptr
, before_PLTE
); /* before PLTE */
1420 png_write_info(write_ptr
, write_info_ptr
);
1422 write_chunks(write_ptr
, before_IDAT
); /* after PLTE */
1424 png_write_info(write_ptr
, write_end_info_ptr
);
1426 write_chunks(write_ptr
, after_IDAT
); /* after IDAT */
1428 #ifdef PNG_COMPRESSION_COMPAT
1429 /* Test the 'compatibility' setting here, if it is available. */
1430 png_set_compression(write_ptr
, PNG_COMPRESSION_COMPAT
);
1434 #ifdef SINGLE_ROWBUF_ALLOC
1435 pngtest_debug("Allocating row buffer...");
1436 row_buf
= (png_bytep
)png_malloc(read_ptr
,
1437 png_get_rowbytes(read_ptr
, read_info_ptr
));
1439 pngtest_debug1("\t0x%08lx", (unsigned long)row_buf
);
1440 #endif /* SINGLE_ROWBUF_ALLOC */
1441 pngtest_debug("Writing row data");
1443 #if defined(PNG_READ_INTERLACING_SUPPORTED) &&\
1444 defined(PNG_WRITE_INTERLACING_SUPPORTED)
1445 /* Both must be defined for libpng to be able to handle the interlace,
1446 * otherwise it gets handled below by simply reading and writing the passes
1449 if (png_set_interlace_handling(read_ptr
) != num_passes
)
1450 png_error(write_ptr
,
1451 "png_set_interlace_handling(read): wrong pass count ");
1452 if (png_set_interlace_handling(write_ptr
) != num_passes
)
1453 png_error(write_ptr
,
1454 "png_set_interlace_handling(write): wrong pass count ");
1455 #else /* png_set_interlace_handling not called on either read or write */
1456 # define calc_pass_height
1457 #endif /* not using libpng interlace handling */
1459 #ifdef PNGTEST_TIMING
1460 t_stop
= (float)clock();
1461 t_misc
+= (t_stop
- t_start
);
1464 for (pass
= 0; pass
< num_passes
; pass
++)
1466 # ifdef calc_pass_height
1467 png_uint_32 pass_height
;
1469 if (num_passes
== 7) /* interlaced */
1471 if (PNG_PASS_COLS(width
, pass
) > 0)
1472 pass_height
= PNG_PASS_ROWS(height
, pass
);
1478 else /* not interlaced */
1479 pass_height
= height
;
1481 # define pass_height height
1484 pngtest_debug1("Writing row data for pass %d", pass
);
1485 for (y
= 0; y
< pass_height
; y
++)
1487 #ifndef SINGLE_ROWBUF_ALLOC
1488 pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass
, y
);
1490 row_buf
= (png_bytep
)png_malloc(read_ptr
,
1491 png_get_rowbytes(read_ptr
, read_info_ptr
));
1493 pngtest_debug2("\t0x%08lx (%lu bytes)", (unsigned long)row_buf
,
1494 (unsigned long)png_get_rowbytes(read_ptr
, read_info_ptr
));
1496 #endif /* !SINGLE_ROWBUF_ALLOC */
1497 png_read_rows(read_ptr
, (png_bytepp
)&row_buf
, NULL
, 1);
1499 #ifdef PNG_WRITE_SUPPORTED
1500 #ifdef PNGTEST_TIMING
1501 t_stop
= (float)clock();
1502 t_decode
+= (t_stop
- t_start
);
1505 png_write_rows(write_ptr
, (png_bytepp
)&row_buf
, 1);
1506 #ifdef PNGTEST_TIMING
1507 t_stop
= (float)clock();
1508 t_encode
+= (t_stop
- t_start
);
1513 #ifndef SINGLE_ROWBUF_ALLOC
1514 pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass
, y
);
1515 png_free(read_ptr
, row_buf
);
1517 #endif /* !SINGLE_ROWBUF_ALLOC */
1521 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
1522 # ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1523 png_free_data(read_ptr
, read_info_ptr
, PNG_FREE_UNKN
, -1);
1525 # ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1526 png_free_data(write_ptr
, write_info_ptr
, PNG_FREE_UNKN
, -1);
1530 pngtest_debug("Reading and writing end_info data");
1532 png_read_end(read_ptr
, end_info_ptr
);
1533 #ifdef PNG_TEXT_SUPPORTED
1538 if (png_get_text(read_ptr
, end_info_ptr
, &text_ptr
, &num_text
) > 0)
1540 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text
);
1542 pngtest_check_text_support(read_ptr
, text_ptr
, num_text
);
1548 fprintf(STDERR
,"\n");
1549 for (i
=0; i
<num_text
; i
++)
1551 fprintf(STDERR
," Text compression[%d]=%d\n",
1552 i
, text_ptr
[i
].compression
);
1556 png_set_text(write_ptr
, write_end_info_ptr
, text_ptr
, num_text
);
1560 #ifdef PNG_READ_eXIf_SUPPORTED
1562 png_bytep exif
=NULL
;
1563 png_uint_32 exif_length
;
1565 if (png_get_eXIf_1(read_ptr
, end_info_ptr
, &exif_length
, &exif
) != 0)
1567 if (exif_length
> 1)
1568 fprintf(STDERR
," eXIf type %c%c, %lu bytes\n",exif
[0],exif
[1],
1569 (unsigned long)exif_length
);
1570 # ifdef PNG_WRITE_eXIf_SUPPORTED
1571 png_set_eXIf_1(write_ptr
, write_end_info_ptr
, exif_length
, exif
);
1576 #ifdef PNG_tIME_SUPPORTED
1580 if (png_get_tIME(read_ptr
, end_info_ptr
, &mod_time
) != 0)
1582 png_set_tIME(write_ptr
, write_end_info_ptr
, mod_time
);
1583 #ifdef PNG_TIME_RFC1123_SUPPORTED
1584 if (png_convert_to_rfc1123_buffer(tIME_string
, mod_time
) != 0)
1585 tIME_string
[(sizeof tIME_string
) - 1] = '\0';
1589 strncpy(tIME_string
, "*** invalid time ***", sizeof tIME_string
);
1590 tIME_string
[(sizeof tIME_string
)-1] = '\0';
1593 tIME_chunk_present
++;
1594 #endif /* TIME_RFC1123 */
1598 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1600 png_unknown_chunkp unknowns
;
1601 int num_unknowns
= png_get_unknown_chunks(read_ptr
, end_info_ptr
,
1604 if (num_unknowns
!= 0)
1606 png_set_unknown_chunks(write_ptr
, write_end_info_ptr
, unknowns
,
1608 #if PNG_LIBPNG_VER < 10600
1609 /* Copy the locations from the read_info_ptr. The automatically
1610 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1611 * because they are reset from the write pointer (removed in 1.6.0).
1615 for (i
= 0; i
< num_unknowns
; i
++)
1616 png_set_unknown_chunk_location(write_ptr
, write_end_info_ptr
, i
,
1617 unknowns
[i
].location
);
1624 #ifdef PNG_WRITE_SUPPORTED
1625 #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
1626 /* Normally one would use Z_DEFAULT_STRATEGY for text compression.
1627 * This is here just to make pngtest replicate the results from libpng
1628 * versions prior to 1.5.4, and to test this new API.
1630 png_set_text_compression_strategy(write_ptr
, Z_FILTERED
);
1633 /* When the unknown vpAg/sTER chunks are written by pngtest the only way to
1634 * do it is to write them *before* calling png_write_end. When unknown
1635 * chunks are written by libpng, however, they are written just before IEND.
1636 * There seems to be no way round this, however vpAg/sTER are not expected
1639 write_chunks(write_ptr
, after_IDAT
);
1641 png_write_end(write_ptr
, write_end_info_ptr
);
1644 #ifdef PNG_EASY_ACCESS_SUPPORTED
1647 png_uint_32 iwidth
, iheight
;
1648 iwidth
= png_get_image_width(write_ptr
, write_info_ptr
);
1649 iheight
= png_get_image_height(write_ptr
, write_info_ptr
);
1650 fprintf(STDERR
, "\n Image width = %lu, height = %lu\n",
1651 (unsigned long)iwidth
, (unsigned long)iheight
);
1655 pngtest_debug("Destroying data structs");
1656 #ifdef SINGLE_ROWBUF_ALLOC
1657 pngtest_debug("destroying row_buf for read_ptr");
1658 png_free(read_ptr
, row_buf
);
1660 #endif /* SINGLE_ROWBUF_ALLOC */
1661 pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr");
1662 png_destroy_read_struct(&read_ptr
, &read_info_ptr
, &end_info_ptr
);
1663 #ifdef PNG_WRITE_SUPPORTED
1664 pngtest_debug("destroying write_end_info_ptr");
1665 png_destroy_info_struct(write_ptr
, &write_end_info_ptr
);
1666 pngtest_debug("destroying write_ptr, write_info_ptr");
1667 png_destroy_write_struct(&write_ptr
, &write_info_ptr
);
1669 pngtest_debug("Destruction complete.");
1674 /* Summarize any warnings or errors and in 'strict' mode fail the test.
1675 * Unsupported chunks can result in warnings, in that case ignore the strict
1676 * setting, otherwise fail the test on warnings as well as errors.
1678 if (error_count
> 0)
1680 /* We don't really expect to get here because of the setjmp handling
1681 * above, but this is safe.
1683 fprintf(STDERR
, "\n %s: %d libpng errors found (%d warnings)",
1684 inname
, error_count
, warning_count
);
1690 # ifdef PNG_WRITE_SUPPORTED
1691 /* If there is no write support nothing was written! */
1692 else if (unsupported_chunks
> 0)
1694 fprintf(STDERR
, "\n %s: unsupported chunks (%d)%s",
1695 inname
, unsupported_chunks
, strict
? ": IGNORED --strict!" : "");
1699 else if (warning_count
> 0)
1701 fprintf(STDERR
, "\n %s: %d libpng warnings found",
1702 inname
, warning_count
);
1708 pngtest_debug("Opening files for comparison");
1709 if ((fpin
= fopen(inname
, "rb")) == NULL
)
1711 fprintf(STDERR
, "Could not find file %s\n", inname
);
1715 if ((fpout
= fopen(outname
, "rb")) == NULL
)
1717 fprintf(STDERR
, "Could not find file %s\n", outname
);
1722 #if defined (PNG_WRITE_SUPPORTED) /* else nothing was written */ &&\
1723 defined (PNG_WRITE_FILTER_SUPPORTED)
1724 if (interlace_preserved
!= 0) /* else the files will be changed */
1728 static int wrote_question
= 0;
1729 size_t num_in
, num_out
;
1730 char inbuf
[256], outbuf
[256];
1732 num_in
= fread(inbuf
, 1, sizeof inbuf
, fpin
);
1733 num_out
= fread(outbuf
, 1, sizeof outbuf
, fpout
);
1735 if (num_in
!= num_out
)
1737 fprintf(STDERR
, "\nFiles %s and %s are of a different size\n",
1740 if (wrote_question
== 0 && unsupported_chunks
== 0)
1743 " Was %s written with the same maximum IDAT"
1744 " chunk size (%d bytes),",
1745 inname
, PNG_ZBUF_SIZE
);
1747 "\n filtering heuristic (libpng default), compression");
1749 " level (zlib default),\n and zlib version (%s)?\n\n",
1757 if (strict
!= 0 && unsupported_chunks
== 0)
1767 if (memcmp(inbuf
, outbuf
, num_in
))
1769 fprintf(STDERR
, "\nFiles %s and %s are different\n", inname
,
1772 if (wrote_question
== 0 && unsupported_chunks
== 0)
1775 " Was %s written with the same maximum"
1776 " IDAT chunk size (%d bytes),",
1777 inname
, PNG_ZBUF_SIZE
);
1779 "\n filtering heuristic (libpng default), compression");
1781 " level (zlib default),\n and zlib version (%s)?\n\n",
1789 /* NOTE: the unsupported_chunks escape is permitted here because
1790 * unsupported text chunk compression will result in the compression
1791 * mode being changed (to NONE) yet, in the test case, the result
1792 * can be exactly the same size!
1794 if (strict
!= 0 && unsupported_chunks
== 0)
1802 #endif /* WRITE && WRITE_FILTER */
1810 /* Input and output filenames */
1812 static const char *inname
= "pngtest/png";
1813 static const char *outname
= "pngout/png";
1815 static const char *inname
= "pngtest.png";
1816 static const char *outname
= "pngout.png";
1820 main(int argc
, char *argv
[])
1825 png_structp dummy_ptr
;
1827 fprintf(STDERR
, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING
);
1828 fprintf(STDERR
, " with zlib version %s\n", ZLIB_VERSION
);
1829 fprintf(STDERR
, "%s", png_get_copyright(NULL
));
1830 /* Show the version of libpng used in building the library */
1831 fprintf(STDERR
, " library (%lu):%s",
1832 (unsigned long)png_access_version_number(),
1833 png_get_header_version(NULL
));
1835 /* Show the version of libpng used in building the application */
1836 fprintf(STDERR
, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER
,
1837 PNG_HEADER_VERSION_STRING
);
1839 /* Do some consistency checking on the memory allocation settings, I'm
1840 * not sure this matters, but it is nice to know, the first of these
1841 * tests should be impossible because of the way the macros are set
1844 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1845 fprintf(STDERR
, " NOTE: Zlib compiled for max 64k, libpng not\n");
1847 /* I think the following can happen. */
1848 #if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1849 fprintf(STDERR
, " NOTE: libpng compiled for max 64k, zlib not\n");
1852 if (strcmp(png_libpng_ver
, PNG_LIBPNG_VER_STRING
))
1855 "Warning: versions are different between png.h and png.c\n");
1856 fprintf(STDERR
, " png.h version: %s\n", PNG_LIBPNG_VER_STRING
);
1857 fprintf(STDERR
, " png.c version: %s\n\n", png_libpng_ver
);
1863 if (strcmp(argv
[1], "-m") == 0)
1866 status_dots_requested
= 0;
1869 else if (strcmp(argv
[1], "-mv") == 0 ||
1870 strcmp(argv
[1], "-vm") == 0 )
1874 status_dots_requested
= 1;
1877 else if (strcmp(argv
[1], "-v") == 0)
1880 status_dots_requested
= 1;
1884 else if (strcmp(argv
[1], "--strict") == 0)
1886 status_dots_requested
= 0;
1894 else if (strcmp(argv
[1], "--relaxed") == 0)
1896 status_dots_requested
= 0;
1903 else if (strcmp(argv
[1], "--xfail") == 0)
1905 status_dots_requested
= 0;
1917 status_dots_requested
= 0;
1921 if (multiple
== 0 && argc
== 3 + verbose
)
1922 outname
= argv
[2 + verbose
];
1924 if ((multiple
== 0 && argc
> 3 + verbose
) ||
1925 (multiple
!= 0 && argc
< 2))
1928 "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
1931 " reads/writes one PNG file (without -m) or multiple files (-m)\n");
1933 " with -m %s is used as a temporary file\n", outname
);
1940 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1941 int allocation_now
= current_allocation
;
1943 for (i
=2; i
<argc
; ++i
)
1946 fprintf(STDERR
, "\n Testing %s:", argv
[i
]);
1948 fprintf(STDERR
, "\n");
1950 kerror
= test_one_file(argv
[i
], outname
);
1953 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1954 fprintf(STDERR
, "\n PASS (%lu zero samples)\n",
1955 (unsigned long)zero_samples
);
1957 fprintf(STDERR
, " PASS\n");
1959 #ifdef PNG_TIME_RFC1123_SUPPORTED
1960 if (tIME_chunk_present
!= 0)
1961 fprintf(STDERR
, " tIME = %s\n", tIME_string
);
1963 tIME_chunk_present
= 0;
1964 #endif /* TIME_RFC1123 */
1970 fprintf(STDERR
, " XFAIL\n");
1973 fprintf(STDERR
, " FAIL\n");
1977 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1978 if (allocation_now
!= current_allocation
)
1979 fprintf(STDERR
, "MEMORY ERROR: %d bytes lost\n",
1980 current_allocation
- allocation_now
);
1982 if (current_allocation
!= 0)
1984 memory_infop pinfo
= pinformation
;
1986 fprintf(STDERR
, "MEMORY ERROR: %d bytes still allocated\n",
1987 current_allocation
);
1989 while (pinfo
!= NULL
)
1991 fprintf(STDERR
, " %lu bytes at %p\n",
1992 (unsigned long)pinfo
->size
,
1994 pinfo
= pinfo
->next
;
1999 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2000 fprintf(STDERR
, " Current memory allocation: %10d bytes\n",
2001 current_allocation
);
2002 fprintf(STDERR
, " Maximum memory allocation: %10d bytes\n",
2003 maximum_allocation
);
2004 fprintf(STDERR
, " Total memory allocation: %10d bytes\n",
2006 fprintf(STDERR
, " Number of allocations: %10d\n",
2014 for (i
= 0; i
<3; ++i
)
2017 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2018 int allocation_now
= current_allocation
;
2021 status_dots_requested
= 1;
2023 else if (verbose
== 0)
2024 status_dots_requested
= 0;
2026 if (i
== 0 || verbose
== 1 || ierror
!= 0)
2028 fprintf(STDERR
, "\n Testing %s:", inname
);
2030 fprintf(STDERR
, "\n");
2034 kerror
= test_one_file(inname
, outname
);
2038 if (verbose
== 1 || i
== 2)
2040 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
2041 fprintf(STDERR
, "\n PASS (%lu zero samples)\n",
2042 (unsigned long)zero_samples
);
2044 fprintf(STDERR
, " PASS\n");
2046 #ifdef PNG_TIME_RFC1123_SUPPORTED
2047 if (tIME_chunk_present
!= 0)
2048 fprintf(STDERR
, " tIME = %s\n", tIME_string
);
2049 #endif /* TIME_RFC1123 */
2055 if (verbose
== 0 && i
!= 2)
2057 fprintf(STDERR
, "\n Testing %s:", inname
);
2059 fprintf(STDERR
, "\n");
2064 fprintf(STDERR
, " XFAIL\n");
2067 fprintf(STDERR
, " FAIL\n");
2071 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2072 if (allocation_now
!= current_allocation
)
2073 fprintf(STDERR
, "MEMORY ERROR: %d bytes lost\n",
2074 current_allocation
- allocation_now
);
2076 if (current_allocation
!= 0)
2078 memory_infop pinfo
= pinformation
;
2080 fprintf(STDERR
, "MEMORY ERROR: %d bytes still allocated\n",
2081 current_allocation
);
2083 while (pinfo
!= NULL
)
2085 fprintf(STDERR
, " %lu bytes at %p\n",
2086 (unsigned long)pinfo
->size
, pinfo
->pointer
);
2087 pinfo
= pinfo
->next
;
2092 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2093 fprintf(STDERR
, " Current memory allocation: %10d bytes\n",
2094 current_allocation
);
2095 fprintf(STDERR
, " Maximum memory allocation: %10d bytes\n",
2096 maximum_allocation
);
2097 fprintf(STDERR
, " Total memory allocation: %10d bytes\n",
2099 fprintf(STDERR
, " Number of allocations: %10d\n",
2104 #ifdef PNGTEST_TIMING
2105 t_stop
= (float)clock();
2106 t_misc
+= (t_stop
- t_start
);
2108 fprintf(STDERR
, " CPU time used = %.3f seconds",
2109 (t_misc
+t_decode
+t_encode
)/(float)CLOCKS_PER_SEC
);
2110 fprintf(STDERR
, " (decoding %.3f,\n",
2111 t_decode
/(float)CLOCKS_PER_SEC
);
2112 fprintf(STDERR
, " encoding %.3f ,",
2113 t_encode
/(float)CLOCKS_PER_SEC
);
2114 fprintf(STDERR
, " other %.3f seconds)\n\n",
2115 t_misc
/(float)CLOCKS_PER_SEC
);
2119 fprintf(STDERR
, " libpng passes test\n");
2122 fprintf(STDERR
, " libpng FAILS test\n");
2124 dummy_ptr
= png_create_read_struct(PNG_LIBPNG_VER_STRING
, NULL
, NULL
, NULL
);
2125 fprintf(STDERR
, " Default limits:\n");
2126 fprintf(STDERR
, " width_max = %lu\n",
2127 (unsigned long) png_get_user_width_max(dummy_ptr
));
2128 fprintf(STDERR
, " height_max = %lu\n",
2129 (unsigned long) png_get_user_height_max(dummy_ptr
));
2130 if (png_get_chunk_cache_max(dummy_ptr
) == 0)
2131 fprintf(STDERR
, " cache_max = unlimited\n");
2133 fprintf(STDERR
, " cache_max = %lu\n",
2134 (unsigned long) png_get_chunk_cache_max(dummy_ptr
));
2135 if (png_get_chunk_malloc_max(dummy_ptr
) == 0)
2136 fprintf(STDERR
, " malloc_max = unlimited\n");
2138 fprintf(STDERR
, " malloc_max = %lu\n",
2139 (unsigned long) png_get_chunk_malloc_max(dummy_ptr
));
2140 png_destroy_read_struct(&dummy_ptr
, NULL
, NULL
);
2142 return (int)(ierror
!= 0);
2149 " test ignored because libpng was not built with read support\n");
2150 /* And skip this test */
2151 return PNG_LIBPNG_VER
< 10600 ? 0 : 77;
2155 /* Generate a compiler error if there is an old png.h in the search path. */
2156 typedef png_libpng_version_1_6_36 Your_png_h_is_not_version_1_6_36
;