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author Grumpy7
date Sun, 16 Mar 2014 21:04:49 +0100
parents 6e178010fc29
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2304:e76b56512abd 2305:a5e8eecac226
1
2 /* pngtest.c - a simple test program to test libpng
3 *
4 * Last changed in libpng 1.6.9 [February 6, 2014]
5 * Copyright (c) 1998-2014 Glenn Randers-Pehrson
6 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
7 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
8 *
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
12 *
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
17 * it probably should.
18 *
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.
27 *
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 ..."
32 */
33
34 #define _POSIX_SOURCE 1
35
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39
40 /* Defined so I can write to a file on gui/windowing platforms */
41 /* #define STDERR stderr */
42 #define STDERR stdout /* For DOS */
43
44 #include "png.h"
45
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
48 *
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).
53 */
54 #if defined PNG_READ_SUPPORTED && /* else nothing can be done */\
55 defined PNG_READ_bKGD_SUPPORTED &&\
56 defined PNG_READ_cHRM_SUPPORTED &&\
57 defined PNG_READ_gAMA_SUPPORTED &&\
58 defined PNG_READ_oFFs_SUPPORTED &&\
59 defined PNG_READ_pCAL_SUPPORTED &&\
60 defined PNG_READ_pHYs_SUPPORTED &&\
61 defined PNG_READ_sBIT_SUPPORTED &&\
62 defined PNG_READ_sCAL_SUPPORTED &&\
63 defined PNG_READ_sRGB_SUPPORTED &&\
64 defined PNG_READ_tEXt_SUPPORTED &&\
65 defined PNG_READ_tIME_SUPPORTED &&\
66 defined PNG_READ_zTXt_SUPPORTED &&\
67 defined PNG_WRITE_INTERLACING_SUPPORTED
68
69 #ifdef PNG_ZLIB_HEADER
70 # include PNG_ZLIB_HEADER /* defined by pnglibconf.h from 1.7 */
71 #else
72 # include "../../lib/zlib/zlib.h"
73 #endif
74
75 /* Copied from pngpriv.h but only used in error messages below. */
76 #ifndef PNG_ZBUF_SIZE
77 # define PNG_ZBUF_SIZE 8192
78 #endif
79 #define FCLOSE(file) fclose(file)
80
81 #ifndef PNG_STDIO_SUPPORTED
82 typedef FILE * png_FILE_p;
83 #endif
84
85 /* Makes pngtest verbose so we can find problems. */
86 #ifndef PNG_DEBUG
87 # define PNG_DEBUG 0
88 #endif
89
90 #if PNG_DEBUG > 1
91 # define pngtest_debug(m) ((void)fprintf(stderr, m "\n"))
92 # define pngtest_debug1(m,p1) ((void)fprintf(stderr, m "\n", p1))
93 # define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2))
94 #else
95 # define pngtest_debug(m) ((void)0)
96 # define pngtest_debug1(m,p1) ((void)0)
97 # define pngtest_debug2(m,p1,p2) ((void)0)
98 #endif
99
100 #if !PNG_DEBUG
101 # define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */
102 #endif
103
104 /* Turn on CPU timing
105 #define PNGTEST_TIMING
106 */
107
108 #ifndef PNG_FLOATING_POINT_SUPPORTED
109 #undef PNGTEST_TIMING
110 #endif
111
112 #ifdef PNGTEST_TIMING
113 static float t_start, t_stop, t_decode, t_encode, t_misc;
114 #include <time.h>
115 #endif
116
117 #ifdef PNG_TIME_RFC1123_SUPPORTED
118 #define PNG_tIME_STRING_LENGTH 29
119 static int tIME_chunk_present = 0;
120 static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present";
121 #endif
122
123 static int verbose = 0;
124 static int strict = 0;
125 static int relaxed = 0;
126 static int unsupported_chunks = 0; /* chunk unsupported by libpng in input */
127 static int error_count = 0; /* count calls to png_error */
128 static int warning_count = 0; /* count calls to png_warning */
129
130 /* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
131 #ifndef png_jmpbuf
132 # define png_jmpbuf(png_ptr) png_ptr->jmpbuf
133 #endif
134
135 /* Defines for unknown chunk handling if required. */
136 #ifndef PNG_HANDLE_CHUNK_ALWAYS
137 # define PNG_HANDLE_CHUNK_ALWAYS 3
138 #endif
139 #ifndef PNG_HANDLE_CHUNK_IF_SAFE
140 # define PNG_HANDLE_CHUNK_IF_SAFE 2
141 #endif
142
143 /* Utility to save typing/errors, the argument must be a name */
144 #define MEMZERO(var) ((void)memset(&var, 0, sizeof var))
145
146 /* Example of using row callbacks to make a simple progress meter */
147 static int status_pass = 1;
148 static int status_dots_requested = 0;
149 static int status_dots = 1;
150
151 static void PNGCBAPI
152 read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
153 {
154 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX)
155 return;
156
157 if (status_pass != pass)
158 {
159 fprintf(stdout, "\n Pass %d: ", pass);
160 status_pass = pass;
161 status_dots = 31;
162 }
163
164 status_dots--;
165
166 if (status_dots == 0)
167 {
168 fprintf(stdout, "\n ");
169 status_dots=30;
170 }
171
172 fprintf(stdout, "r");
173 }
174
175 #ifdef PNG_WRITE_SUPPORTED
176 static void PNGCBAPI
177 write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
178 {
179 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7)
180 return;
181
182 fprintf(stdout, "w");
183 }
184 #endif
185
186
187 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
188 /* Example of using user transform callback (we don't transform anything,
189 * but merely examine the row filters. We set this to 256 rather than
190 * 5 in case illegal filter values are present.)
191 */
192 static png_uint_32 filters_used[256];
193 static void PNGCBAPI
194 count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data)
195 {
196 if (png_ptr != NULL && row_info != NULL)
197 ++filters_used[*(data - 1)];
198 }
199 #endif
200
201 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
202 /* Example of using user transform callback (we don't transform anything,
203 * but merely count the zero samples)
204 */
205
206 static png_uint_32 zero_samples;
207
208 static void PNGCBAPI
209 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
210 {
211 png_bytep dp = data;
212 if (png_ptr == NULL)
213 return;
214
215 /* Contents of row_info:
216 * png_uint_32 width width of row
217 * png_uint_32 rowbytes number of bytes in row
218 * png_byte color_type color type of pixels
219 * png_byte bit_depth bit depth of samples
220 * png_byte channels number of channels (1-4)
221 * png_byte pixel_depth bits per pixel (depth*channels)
222 */
223
224 /* Counts the number of zero samples (or zero pixels if color_type is 3 */
225
226 if (row_info->color_type == 0 || row_info->color_type == 3)
227 {
228 int pos = 0;
229 png_uint_32 n, nstop;
230
231 for (n = 0, nstop=row_info->width; n<nstop; n++)
232 {
233 if (row_info->bit_depth == 1)
234 {
235 if (((*dp << pos++ ) & 0x80) == 0)
236 zero_samples++;
237
238 if (pos == 8)
239 {
240 pos = 0;
241 dp++;
242 }
243 }
244
245 if (row_info->bit_depth == 2)
246 {
247 if (((*dp << (pos+=2)) & 0xc0) == 0)
248 zero_samples++;
249
250 if (pos == 8)
251 {
252 pos = 0;
253 dp++;
254 }
255 }
256
257 if (row_info->bit_depth == 4)
258 {
259 if (((*dp << (pos+=4)) & 0xf0) == 0)
260 zero_samples++;
261
262 if (pos == 8)
263 {
264 pos = 0;
265 dp++;
266 }
267 }
268
269 if (row_info->bit_depth == 8)
270 if (*dp++ == 0)
271 zero_samples++;
272
273 if (row_info->bit_depth == 16)
274 {
275 if ((*dp | *(dp+1)) == 0)
276 zero_samples++;
277 dp+=2;
278 }
279 }
280 }
281 else /* Other color types */
282 {
283 png_uint_32 n, nstop;
284 int channel;
285 int color_channels = row_info->channels;
286 if (row_info->color_type > 3)color_channels--;
287
288 for (n = 0, nstop=row_info->width; n<nstop; n++)
289 {
290 for (channel = 0; channel < color_channels; channel++)
291 {
292 if (row_info->bit_depth == 8)
293 if (*dp++ == 0)
294 zero_samples++;
295
296 if (row_info->bit_depth == 16)
297 {
298 if ((*dp | *(dp+1)) == 0)
299 zero_samples++;
300
301 dp+=2;
302 }
303 }
304 if (row_info->color_type > 3)
305 {
306 dp++;
307 if (row_info->bit_depth == 16)
308 dp++;
309 }
310 }
311 }
312 }
313 #endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */
314
315 #ifndef PNG_STDIO_SUPPORTED
316 /* START of code to validate stdio-free compilation */
317 /* These copies of the default read/write functions come from pngrio.c and
318 * pngwio.c. They allow "don't include stdio" testing of the library.
319 * This is the function that does the actual reading of data. If you are
320 * not reading from a standard C stream, you should create a replacement
321 * read_data function and use it at run time with png_set_read_fn(), rather
322 * than changing the library.
323 */
324
325 #ifdef PNG_IO_STATE_SUPPORTED
326 void
327 pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
328 png_uint_32 io_op);
329 void
330 pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
331 png_uint_32 io_op)
332 {
333 png_uint_32 io_state = png_get_io_state(png_ptr);
334 int err = 0;
335
336 /* Check if the current operation (reading / writing) is as expected. */
337 if ((io_state & PNG_IO_MASK_OP) != io_op)
338 png_error(png_ptr, "Incorrect operation in I/O state");
339
340 /* Check if the buffer size specific to the current location
341 * (file signature / header / data / crc) is as expected.
342 */
343 switch (io_state & PNG_IO_MASK_LOC)
344 {
345 case PNG_IO_SIGNATURE:
346 if (data_length > 8)
347 err = 1;
348 break;
349 case PNG_IO_CHUNK_HDR:
350 if (data_length != 8)
351 err = 1;
352 break;
353 case PNG_IO_CHUNK_DATA:
354 break; /* no restrictions here */
355 case PNG_IO_CHUNK_CRC:
356 if (data_length != 4)
357 err = 1;
358 break;
359 default:
360 err = 1; /* uninitialized */
361 }
362 if (err)
363 png_error(png_ptr, "Bad I/O state or buffer size");
364 }
365 #endif
366
367 static void PNGCBAPI
368 pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
369 {
370 png_size_t check = 0;
371 png_voidp io_ptr;
372
373 /* fread() returns 0 on error, so it is OK to store this in a png_size_t
374 * instead of an int, which is what fread() actually returns.
375 */
376 io_ptr = png_get_io_ptr(png_ptr);
377 if (io_ptr != NULL)
378 {
379 check = fread(data, 1, length, (png_FILE_p)io_ptr);
380 }
381
382 if (check != length)
383 {
384 png_error(png_ptr, "Read Error");
385 }
386
387 #ifdef PNG_IO_STATE_SUPPORTED
388 pngtest_check_io_state(png_ptr, length, PNG_IO_READING);
389 #endif
390 }
391
392 #ifdef PNG_WRITE_FLUSH_SUPPORTED
393 static void PNGCBAPI
394 pngtest_flush(png_structp png_ptr)
395 {
396 /* Do nothing; fflush() is said to be just a waste of energy. */
397 PNG_UNUSED(png_ptr) /* Stifle compiler warning */
398 }
399 #endif
400
401 /* This is the function that does the actual writing of data. If you are
402 * not writing to a standard C stream, you should create a replacement
403 * write_data function and use it at run time with png_set_write_fn(), rather
404 * than changing the library.
405 */
406 static void PNGCBAPI
407 pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
408 {
409 png_size_t check;
410
411 check = fwrite(data, 1, length, (png_FILE_p)png_get_io_ptr(png_ptr));
412
413 if (check != length)
414 {
415 png_error(png_ptr, "Write Error");
416 }
417
418 #ifdef PNG_IO_STATE_SUPPORTED
419 pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING);
420 #endif
421 }
422 #endif /* !PNG_STDIO_SUPPORTED */
423
424 /* This function is called when there is a warning, but the library thinks
425 * it can continue anyway. Replacement functions don't have to do anything
426 * here if you don't want to. In the default configuration, png_ptr is
427 * not used, but it is passed in case it may be useful.
428 */
429 typedef struct
430 {
431 PNG_CONST char *file_name;
432 } pngtest_error_parameters;
433
434 static void PNGCBAPI
435 pngtest_warning(png_structp png_ptr, png_const_charp message)
436 {
437 PNG_CONST char *name = "UNKNOWN (ERROR!)";
438 pngtest_error_parameters *test =
439 (pngtest_error_parameters*)png_get_error_ptr(png_ptr);
440
441 ++warning_count;
442
443 if (test != NULL && test->file_name != NULL)
444 name = test->file_name;
445
446 fprintf(STDERR, "%s: libpng warning: %s\n", name, message);
447 }
448
449 /* This is the default error handling function. Note that replacements for
450 * this function MUST NOT RETURN, or the program will likely crash. This
451 * function is used by default, or if the program supplies NULL for the
452 * error function pointer in png_set_error_fn().
453 */
454 static void PNGCBAPI
455 pngtest_error(png_structp png_ptr, png_const_charp message)
456 {
457 ++error_count;
458
459 pngtest_warning(png_ptr, message);
460 /* We can return because png_error calls the default handler, which is
461 * actually OK in this case.
462 */
463 }
464
465 /* END of code to validate stdio-free compilation */
466
467 /* START of code to validate memory allocation and deallocation */
468 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
469
470 /* Allocate memory. For reasonable files, size should never exceed
471 * 64K. However, zlib may allocate more then 64K if you don't tell
472 * it not to. See zconf.h and png.h for more information. zlib does
473 * need to allocate exactly 64K, so whatever you call here must
474 * have the ability to do that.
475 *
476 * This piece of code can be compiled to validate max 64K allocations
477 * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K.
478 */
479 typedef struct memory_information
480 {
481 png_alloc_size_t size;
482 png_voidp pointer;
483 struct memory_information *next;
484 } memory_information;
485 typedef memory_information *memory_infop;
486
487 static memory_infop pinformation = NULL;
488 static int current_allocation = 0;
489 static int maximum_allocation = 0;
490 static int total_allocation = 0;
491 static int num_allocations = 0;
492
493 png_voidp PNGCBAPI png_debug_malloc PNGARG((png_structp png_ptr,
494 png_alloc_size_t size));
495 void PNGCBAPI png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr));
496
497 png_voidp
498 PNGCBAPI png_debug_malloc(png_structp png_ptr, png_alloc_size_t size)
499 {
500
501 /* png_malloc has already tested for NULL; png_create_struct calls
502 * png_debug_malloc directly, with png_ptr == NULL which is OK
503 */
504
505 if (size == 0)
506 return (NULL);
507
508 /* This calls the library allocator twice, once to get the requested
509 buffer and once to get a new free list entry. */
510 {
511 /* Disable malloc_fn and free_fn */
512 memory_infop pinfo;
513 png_set_mem_fn(png_ptr, NULL, NULL, NULL);
514 pinfo = (memory_infop)png_malloc(png_ptr,
515 (sizeof *pinfo));
516 pinfo->size = size;
517 current_allocation += size;
518 total_allocation += size;
519 num_allocations ++;
520
521 if (current_allocation > maximum_allocation)
522 maximum_allocation = current_allocation;
523
524 pinfo->pointer = png_malloc(png_ptr, size);
525 /* Restore malloc_fn and free_fn */
526
527 png_set_mem_fn(png_ptr,
528 NULL, png_debug_malloc, png_debug_free);
529
530 if (size != 0 && pinfo->pointer == NULL)
531 {
532 current_allocation -= size;
533 total_allocation -= size;
534 png_error(png_ptr,
535 "out of memory in pngtest->png_debug_malloc");
536 }
537
538 pinfo->next = pinformation;
539 pinformation = pinfo;
540 /* Make sure the caller isn't assuming zeroed memory. */
541 memset(pinfo->pointer, 0xdd, pinfo->size);
542
543 if (verbose)
544 printf("png_malloc %lu bytes at %p\n", (unsigned long)size,
545 pinfo->pointer);
546
547 return (png_voidp)(pinfo->pointer);
548 }
549 }
550
551 /* Free a pointer. It is removed from the list at the same time. */
552 void PNGCBAPI
553 png_debug_free(png_structp png_ptr, png_voidp ptr)
554 {
555 if (png_ptr == NULL)
556 fprintf(STDERR, "NULL pointer to png_debug_free.\n");
557
558 if (ptr == 0)
559 {
560 #if 0 /* This happens all the time. */
561 fprintf(STDERR, "WARNING: freeing NULL pointer\n");
562 #endif
563 return;
564 }
565
566 /* Unlink the element from the list. */
567 {
568 memory_infop *ppinfo = &pinformation;
569
570 for (;;)
571 {
572 memory_infop pinfo = *ppinfo;
573
574 if (pinfo->pointer == ptr)
575 {
576 *ppinfo = pinfo->next;
577 current_allocation -= pinfo->size;
578 if (current_allocation < 0)
579 fprintf(STDERR, "Duplicate free of memory\n");
580 /* We must free the list element too, but first kill
581 the memory that is to be freed. */
582 memset(ptr, 0x55, pinfo->size);
583 if (pinfo)
584 free(pinfo);
585 pinfo = NULL;
586 break;
587 }
588
589 if (pinfo->next == NULL)
590 {
591 fprintf(STDERR, "Pointer %x not found\n", (unsigned int)ptr);
592 break;
593 }
594
595 ppinfo = &pinfo->next;
596 }
597 }
598
599 /* Finally free the data. */
600 if (verbose)
601 printf("Freeing %p\n", ptr);
602
603 if (ptr)
604 free(ptr);
605 ptr = NULL;
606 }
607 #endif /* PNG_USER_MEM_SUPPORTED && PNG_DEBUG */
608 /* END of code to test memory allocation/deallocation */
609
610
611 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
612 /* Demonstration of user chunk support of the sTER and vpAg chunks */
613
614 /* (sTER is a public chunk not yet known by libpng. vpAg is a private
615 chunk used in ImageMagick to store "virtual page" size). */
616
617 static struct user_chunk_data
618 {
619 png_const_infop info_ptr;
620 png_uint_32 vpAg_width, vpAg_height;
621 png_byte vpAg_units;
622 png_byte sTER_mode;
623 int location[2];
624 }
625 user_chunk_data;
626
627 /* Used for location and order; zero means nothing. */
628 #define have_sTER 0x01
629 #define have_vpAg 0x02
630 #define before_PLTE 0x10
631 #define before_IDAT 0x20
632 #define after_IDAT 0x40
633
634 static void
635 init_callback_info(png_const_infop info_ptr)
636 {
637 MEMZERO(user_chunk_data);
638 user_chunk_data.info_ptr = info_ptr;
639 }
640
641 static int
642 set_location(png_structp png_ptr, struct user_chunk_data *data, int what)
643 {
644 int location;
645
646 if ((data->location[0] & what) || (data->location[1] & what))
647 return 0; /* already have one of these */
648
649 /* Find where we are (the code below zeros info_ptr to indicate that the
650 * chunks before the first IDAT have been read.)
651 */
652 if (data->info_ptr == NULL) /* after IDAT */
653 location = what | after_IDAT;
654
655 else if (png_get_valid(png_ptr, data->info_ptr, PNG_INFO_PLTE))
656 location = what | before_IDAT;
657
658 else
659 location = what | before_PLTE;
660
661 if (data->location[0] == 0)
662 data->location[0] = location;
663
664 else
665 data->location[1] = location;
666
667 return 1; /* handled */
668 }
669
670 static int PNGCBAPI
671 read_user_chunk_callback(png_struct *png_ptr, png_unknown_chunkp chunk)
672 {
673 struct user_chunk_data *my_user_chunk_data =
674 (struct user_chunk_data*)png_get_user_chunk_ptr(png_ptr);
675
676 if (my_user_chunk_data == NULL)
677 png_error(png_ptr, "lost user chunk pointer");
678
679 /* Return one of the following:
680 * return (-n); chunk had an error
681 * return (0); did not recognize
682 * return (n); success
683 *
684 * The unknown chunk structure contains the chunk data:
685 * png_byte name[5];
686 * png_byte *data;
687 * png_size_t size;
688 *
689 * Note that libpng has already taken care of the CRC handling.
690 */
691
692 if (chunk->name[0] == 115 && chunk->name[1] == 84 && /* s T */
693 chunk->name[2] == 69 && chunk->name[3] == 82) /* E R */
694 {
695 /* Found sTER chunk */
696 if (chunk->size != 1)
697 return (-1); /* Error return */
698
699 if (chunk->data[0] != 0 && chunk->data[0] != 1)
700 return (-1); /* Invalid mode */
701
702 if (set_location(png_ptr, my_user_chunk_data, have_sTER))
703 {
704 my_user_chunk_data->sTER_mode=chunk->data[0];
705 return (1);
706 }
707
708 else
709 return (0); /* duplicate sTER - give it to libpng */
710 }
711
712 if (chunk->name[0] != 118 || chunk->name[1] != 112 || /* v p */
713 chunk->name[2] != 65 || chunk->name[3] != 103) /* A g */
714 return (0); /* Did not recognize */
715
716 /* Found ImageMagick vpAg chunk */
717
718 if (chunk->size != 9)
719 return (-1); /* Error return */
720
721 if (!set_location(png_ptr, my_user_chunk_data, have_vpAg))
722 return (0); /* duplicate vpAg */
723
724 my_user_chunk_data->vpAg_width = png_get_uint_31(png_ptr, chunk->data);
725 my_user_chunk_data->vpAg_height = png_get_uint_31(png_ptr, chunk->data + 4);
726 my_user_chunk_data->vpAg_units = chunk->data[8];
727
728 return (1);
729 }
730
731 #ifdef PNG_WRITE_SUPPORTED
732 static void
733 write_sTER_chunk(png_structp write_ptr)
734 {
735 png_byte sTER[5] = {115, 84, 69, 82, '\0'};
736
737 if (verbose)
738 fprintf(STDERR, "\n stereo mode = %d\n", user_chunk_data.sTER_mode);
739
740 png_write_chunk(write_ptr, sTER, &user_chunk_data.sTER_mode, 1);
741 }
742
743 static void
744 write_vpAg_chunk(png_structp write_ptr)
745 {
746 png_byte vpAg[5] = {118, 112, 65, 103, '\0'};
747
748 png_byte vpag_chunk_data[9];
749
750 if (verbose)
751 fprintf(STDERR, " vpAg = %lu x %lu, units = %d\n",
752 (unsigned long)user_chunk_data.vpAg_width,
753 (unsigned long)user_chunk_data.vpAg_height,
754 user_chunk_data.vpAg_units);
755
756 png_save_uint_32(vpag_chunk_data, user_chunk_data.vpAg_width);
757 png_save_uint_32(vpag_chunk_data + 4, user_chunk_data.vpAg_height);
758 vpag_chunk_data[8] = user_chunk_data.vpAg_units;
759 png_write_chunk(write_ptr, vpAg, vpag_chunk_data, 9);
760 }
761
762 static void
763 write_chunks(png_structp write_ptr, int location)
764 {
765 int i;
766
767 /* Notice that this preserves the original chunk order, however chunks
768 * intercepted by the callback will be written *after* chunks passed to
769 * libpng. This will actually reverse a pair of sTER chunks or a pair of
770 * vpAg chunks, resulting in an error later. This is not worth worrying
771 * about - the chunks should not be duplicated!
772 */
773 for (i=0; i<2; ++i)
774 {
775 if (user_chunk_data.location[i] == (location | have_sTER))
776 write_sTER_chunk(write_ptr);
777
778 else if (user_chunk_data.location[i] == (location | have_vpAg))
779 write_vpAg_chunk(write_ptr);
780 }
781 }
782 #endif /* PNG_WRITE_SUPPORTED */
783 #else /* !PNG_READ_USER_CHUNKS_SUPPORTED */
784 # define write_chunks(pp,loc) ((void)0)
785 #endif
786 /* END of code to demonstrate user chunk support */
787
788 /* START of code to check that libpng has the required text support; this only
789 * checks for the write support because if read support is missing the chunk
790 * will simply not be reported back to pngtest.
791 */
792 #ifdef PNG_TEXT_SUPPORTED
793 static void
794 pngtest_check_text_support(png_const_structp png_ptr, png_textp text_ptr,
795 int num_text)
796 {
797 while (num_text > 0)
798 {
799 switch (text_ptr[--num_text].compression)
800 {
801 case PNG_TEXT_COMPRESSION_NONE:
802 break;
803
804 case PNG_TEXT_COMPRESSION_zTXt:
805 # ifndef PNG_WRITE_zTXt_SUPPORTED
806 ++unsupported_chunks;
807 # endif
808 break;
809
810 case PNG_ITXT_COMPRESSION_NONE:
811 case PNG_ITXT_COMPRESSION_zTXt:
812 # ifndef PNG_WRITE_iTXt_SUPPORTED
813 ++unsupported_chunks;
814 # endif
815 break;
816
817 default:
818 /* This is an error */
819 png_error(png_ptr, "invalid text chunk compression field");
820 break;
821 }
822 }
823 }
824 #endif
825 /* END of code to check that libpng has the required text support */
826
827 /* Test one file */
828 static int
829 test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
830 {
831 static png_FILE_p fpin;
832 static png_FILE_p fpout; /* "static" prevents setjmp corruption */
833 pngtest_error_parameters error_parameters;
834 png_structp read_ptr;
835 png_infop read_info_ptr, end_info_ptr;
836 #ifdef PNG_WRITE_SUPPORTED
837 png_structp write_ptr;
838 png_infop write_info_ptr;
839 png_infop write_end_info_ptr;
840 int interlace_preserved = 1;
841 #else
842 png_structp write_ptr = NULL;
843 png_infop write_info_ptr = NULL;
844 png_infop write_end_info_ptr = NULL;
845 #endif
846 png_bytep row_buf;
847 png_uint_32 y;
848 png_uint_32 width, height;
849 int num_pass = 1, pass;
850 int bit_depth, color_type;
851
852 row_buf = NULL;
853 error_parameters.file_name = inname;
854
855 if ((fpin = fopen(inname, "rb")) == NULL)
856 {
857 fprintf(STDERR, "Could not find input file %s\n", inname);
858 return (1);
859 }
860
861 if ((fpout = fopen(outname, "wb")) == NULL)
862 {
863 fprintf(STDERR, "Could not open output file %s\n", outname);
864 FCLOSE(fpin);
865 return (1);
866 }
867
868 pngtest_debug("Allocating read and write structures");
869 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
870 read_ptr =
871 png_create_read_struct_2(PNG_LIBPNG_VER_STRING, NULL,
872 NULL, NULL, NULL, png_debug_malloc, png_debug_free);
873 #else
874 read_ptr =
875 png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
876 #endif
877 png_set_error_fn(read_ptr, &error_parameters, pngtest_error,
878 pngtest_warning);
879
880 #ifdef PNG_WRITE_SUPPORTED
881 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
882 write_ptr =
883 png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL,
884 NULL, NULL, NULL, png_debug_malloc, png_debug_free);
885 #else
886 write_ptr =
887 png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
888 #endif
889 png_set_error_fn(write_ptr, &error_parameters, pngtest_error,
890 pngtest_warning);
891 #endif
892 pngtest_debug("Allocating read_info, write_info and end_info structures");
893 read_info_ptr = png_create_info_struct(read_ptr);
894 end_info_ptr = png_create_info_struct(read_ptr);
895 #ifdef PNG_WRITE_SUPPORTED
896 write_info_ptr = png_create_info_struct(write_ptr);
897 write_end_info_ptr = png_create_info_struct(write_ptr);
898 #endif
899
900 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
901 init_callback_info(read_info_ptr);
902 png_set_read_user_chunk_fn(read_ptr, &user_chunk_data,
903 read_user_chunk_callback);
904 #endif
905
906 #ifdef PNG_SETJMP_SUPPORTED
907 pngtest_debug("Setting jmpbuf for read struct");
908 if (setjmp(png_jmpbuf(read_ptr)))
909 {
910 fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
911 png_free(read_ptr, row_buf);
912 row_buf = NULL;
913 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
914 #ifdef PNG_WRITE_SUPPORTED
915 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
916 png_destroy_write_struct(&write_ptr, &write_info_ptr);
917 #endif
918 FCLOSE(fpin);
919 FCLOSE(fpout);
920 return (1);
921 }
922
923 #ifdef PNG_WRITE_SUPPORTED
924 pngtest_debug("Setting jmpbuf for write struct");
925
926 if (setjmp(png_jmpbuf(write_ptr)))
927 {
928 fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
929 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
930 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
931 #ifdef PNG_WRITE_SUPPORTED
932 png_destroy_write_struct(&write_ptr, &write_info_ptr);
933 #endif
934 FCLOSE(fpin);
935 FCLOSE(fpout);
936 return (1);
937 }
938 #endif
939 #endif
940
941 if (strict)
942 {
943 /* Treat png_benign_error() as errors on read */
944 png_set_benign_errors(read_ptr, 0);
945
946 #ifdef PNG_WRITE_SUPPORTED
947 /* Treat them as errors on write */
948 png_set_benign_errors(write_ptr, 0);
949 #endif
950
951 /* if strict is not set, then app warnings and errors are treated as
952 * warnings in release builds, but not in unstable builds; this can be
953 * changed with '--relaxed'.
954 */
955 }
956
957 else if (relaxed)
958 {
959 /* Allow application (pngtest) errors and warnings to pass */
960 png_set_benign_errors(read_ptr, 1);
961
962 #ifdef PNG_WRITE_SUPPORTED
963 png_set_benign_errors(write_ptr, 1);
964 #endif
965 }
966
967 pngtest_debug("Initializing input and output streams");
968 #ifdef PNG_STDIO_SUPPORTED
969 png_init_io(read_ptr, fpin);
970 # ifdef PNG_WRITE_SUPPORTED
971 png_init_io(write_ptr, fpout);
972 # endif
973 #else
974 png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data);
975 # ifdef PNG_WRITE_SUPPORTED
976 png_set_write_fn(write_ptr, (png_voidp)fpout, pngtest_write_data,
977 # ifdef PNG_WRITE_FLUSH_SUPPORTED
978 pngtest_flush);
979 # else
980 NULL);
981 # endif
982 # endif
983 #endif
984
985 if (status_dots_requested == 1)
986 {
987 #ifdef PNG_WRITE_SUPPORTED
988 png_set_write_status_fn(write_ptr, write_row_callback);
989 #endif
990 png_set_read_status_fn(read_ptr, read_row_callback);
991 }
992
993 else
994 {
995 #ifdef PNG_WRITE_SUPPORTED
996 png_set_write_status_fn(write_ptr, NULL);
997 #endif
998 png_set_read_status_fn(read_ptr, NULL);
999 }
1000
1001 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1002 {
1003 int i;
1004
1005 for (i = 0; i<256; i++)
1006 filters_used[i] = 0;
1007
1008 png_set_read_user_transform_fn(read_ptr, count_filters);
1009 }
1010 #endif
1011 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1012 zero_samples = 0;
1013 png_set_write_user_transform_fn(write_ptr, count_zero_samples);
1014 #endif
1015
1016 #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
1017 /* Preserve all the unknown chunks, if possible. If this is disabled then,
1018 * even if the png_{get,set}_unknown_chunks stuff is enabled, we can't use
1019 * libpng to *save* the unknown chunks on read (because we can't switch the
1020 * save option on!)
1021 *
1022 * Notice that if SET_UNKNOWN_CHUNKS is *not* supported read will discard all
1023 * unknown chunks and write will write them all.
1024 */
1025 #ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
1026 png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS,
1027 NULL, 0);
1028 #endif
1029 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1030 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS,
1031 NULL, 0);
1032 #endif
1033 #endif
1034
1035 pngtest_debug("Reading info struct");
1036 png_read_info(read_ptr, read_info_ptr);
1037
1038 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1039 /* This is a bit of a hack; there is no obvious way in the callback function
1040 * to determine that the chunks before the first IDAT have been read, so
1041 * remove the info_ptr (which is only used to determine position relative to
1042 * PLTE) here to indicate that we are after the IDAT.
1043 */
1044 user_chunk_data.info_ptr = NULL;
1045 #endif
1046
1047 pngtest_debug("Transferring info struct");
1048 {
1049 int interlace_type, compression_type, filter_type;
1050
1051 if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth,
1052 &color_type, &interlace_type, &compression_type, &filter_type))
1053 {
1054 png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth,
1055 color_type, interlace_type, compression_type, filter_type);
1056 #ifndef PNG_READ_INTERLACING_SUPPORTED
1057 /* num_pass will not be set below, set it here if the image is
1058 * interlaced: what happens is that write interlacing is *not* turned
1059 * on an the partial interlaced rows are written directly.
1060 */
1061 switch (interlace_type)
1062 {
1063 case PNG_INTERLACE_NONE:
1064 num_pass = 1;
1065 break;
1066
1067 case PNG_INTERLACE_ADAM7:
1068 num_pass = 7;
1069 break;
1070
1071 default:
1072 png_error(read_ptr, "invalid interlace type");
1073 /*NOT REACHED*/
1074 }
1075 #endif
1076 }
1077 }
1078 #ifdef PNG_FIXED_POINT_SUPPORTED
1079 #ifdef PNG_cHRM_SUPPORTED
1080 {
1081 png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
1082 blue_y;
1083
1084 if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y,
1085 &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y))
1086 {
1087 png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x,
1088 red_y, green_x, green_y, blue_x, blue_y);
1089 }
1090 }
1091 #endif
1092 #ifdef PNG_gAMA_SUPPORTED
1093 {
1094 png_fixed_point gamma;
1095
1096 if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma))
1097 png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma);
1098 }
1099 #endif
1100 #else /* Use floating point versions */
1101 #ifdef PNG_FLOATING_POINT_SUPPORTED
1102 #ifdef PNG_cHRM_SUPPORTED
1103 {
1104 double white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
1105 blue_y;
1106
1107 if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
1108 &red_y, &green_x, &green_y, &blue_x, &blue_y))
1109 {
1110 png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x,
1111 red_y, green_x, green_y, blue_x, blue_y);
1112 }
1113 }
1114 #endif
1115 #ifdef PNG_gAMA_SUPPORTED
1116 {
1117 double gamma;
1118
1119 if (png_get_gAMA(read_ptr, read_info_ptr, &gamma))
1120 png_set_gAMA(write_ptr, write_info_ptr, gamma);
1121 }
1122 #endif
1123 #endif /* Floating point */
1124 #endif /* Fixed point */
1125 #ifdef PNG_iCCP_SUPPORTED
1126 {
1127 png_charp name;
1128 png_bytep profile;
1129 png_uint_32 proflen;
1130 int compression_type;
1131
1132 if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type,
1133 &profile, &proflen))
1134 {
1135 png_set_iCCP(write_ptr, write_info_ptr, name, compression_type,
1136 profile, proflen);
1137 }
1138 }
1139 #endif
1140 #ifdef PNG_sRGB_SUPPORTED
1141 {
1142 int intent;
1143
1144 if (png_get_sRGB(read_ptr, read_info_ptr, &intent))
1145 png_set_sRGB(write_ptr, write_info_ptr, intent);
1146 }
1147 #endif
1148 {
1149 png_colorp palette;
1150 int num_palette;
1151
1152 if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette))
1153 png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
1154 }
1155 #ifdef PNG_bKGD_SUPPORTED
1156 {
1157 png_color_16p background;
1158
1159 if (png_get_bKGD(read_ptr, read_info_ptr, &background))
1160 {
1161 png_set_bKGD(write_ptr, write_info_ptr, background);
1162 }
1163 }
1164 #endif
1165 #ifdef PNG_hIST_SUPPORTED
1166 {
1167 png_uint_16p hist;
1168
1169 if (png_get_hIST(read_ptr, read_info_ptr, &hist))
1170 png_set_hIST(write_ptr, write_info_ptr, hist);
1171 }
1172 #endif
1173 #ifdef PNG_oFFs_SUPPORTED
1174 {
1175 png_int_32 offset_x, offset_y;
1176 int unit_type;
1177
1178 if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y,
1179 &unit_type))
1180 {
1181 png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
1182 }
1183 }
1184 #endif
1185 #ifdef PNG_pCAL_SUPPORTED
1186 {
1187 png_charp purpose, units;
1188 png_charpp params;
1189 png_int_32 X0, X1;
1190 int type, nparams;
1191
1192 if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type,
1193 &nparams, &units, &params))
1194 {
1195 png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type,
1196 nparams, units, params);
1197 }
1198 }
1199 #endif
1200 #ifdef PNG_pHYs_SUPPORTED
1201 {
1202 png_uint_32 res_x, res_y;
1203 int unit_type;
1204
1205 if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y, &unit_type))
1206 png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type);
1207 }
1208 #endif
1209 #ifdef PNG_sBIT_SUPPORTED
1210 {
1211 png_color_8p sig_bit;
1212
1213 if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit))
1214 png_set_sBIT(write_ptr, write_info_ptr, sig_bit);
1215 }
1216 #endif
1217 #ifdef PNG_sCAL_SUPPORTED
1218 #if defined(PNG_FLOATING_POINT_SUPPORTED) && \
1219 defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
1220 {
1221 int unit;
1222 double scal_width, scal_height;
1223
1224 if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width,
1225 &scal_height))
1226 {
1227 png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height);
1228 }
1229 }
1230 #else
1231 #ifdef PNG_FIXED_POINT_SUPPORTED
1232 {
1233 int unit;
1234 png_charp scal_width, scal_height;
1235
1236 if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width,
1237 &scal_height))
1238 {
1239 png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width,
1240 scal_height);
1241 }
1242 }
1243 #endif
1244 #endif
1245 #endif
1246 #ifdef PNG_TEXT_SUPPORTED
1247 {
1248 png_textp text_ptr;
1249 int num_text;
1250
1251 if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
1252 {
1253 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1254
1255 pngtest_check_text_support(read_ptr, text_ptr, num_text);
1256
1257 if (verbose)
1258 {
1259 int i;
1260
1261 printf("\n");
1262 for (i=0; i<num_text; i++)
1263 {
1264 printf(" Text compression[%d]=%d\n",
1265 i, text_ptr[i].compression);
1266 }
1267 }
1268
1269 png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
1270 }
1271 }
1272 #endif
1273 #ifdef PNG_tIME_SUPPORTED
1274 {
1275 png_timep mod_time;
1276
1277 if (png_get_tIME(read_ptr, read_info_ptr, &mod_time))
1278 {
1279 png_set_tIME(write_ptr, write_info_ptr, mod_time);
1280 #ifdef PNG_TIME_RFC1123_SUPPORTED
1281 if (png_convert_to_rfc1123_buffer(tIME_string, mod_time))
1282 tIME_string[(sizeof tIME_string) - 1] = '\0';
1283
1284 else
1285 {
1286 strncpy(tIME_string, "*** invalid time ***", (sizeof tIME_string));
1287 tIME_string[(sizeof tIME_string) - 1] = '\0';
1288 }
1289
1290 tIME_chunk_present++;
1291 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1292 }
1293 }
1294 #endif
1295 #ifdef PNG_tRNS_SUPPORTED
1296 {
1297 png_bytep trans_alpha;
1298 int num_trans;
1299 png_color_16p trans_color;
1300
1301 if (png_get_tRNS(read_ptr, read_info_ptr, &trans_alpha, &num_trans,
1302 &trans_color))
1303 {
1304 int sample_max = (1 << bit_depth);
1305 /* libpng doesn't reject a tRNS chunk with out-of-range samples */
1306 if (!((color_type == PNG_COLOR_TYPE_GRAY &&
1307 (int)trans_color->gray > sample_max) ||
1308 (color_type == PNG_COLOR_TYPE_RGB &&
1309 ((int)trans_color->red > sample_max ||
1310 (int)trans_color->green > sample_max ||
1311 (int)trans_color->blue > sample_max))))
1312 png_set_tRNS(write_ptr, write_info_ptr, trans_alpha, num_trans,
1313 trans_color);
1314 }
1315 }
1316 #endif
1317 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1318 {
1319 png_unknown_chunkp unknowns;
1320 int num_unknowns = png_get_unknown_chunks(read_ptr, read_info_ptr,
1321 &unknowns);
1322
1323 if (num_unknowns)
1324 {
1325 png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns,
1326 num_unknowns);
1327 #if PNG_LIBPNG_VER < 10600
1328 /* Copy the locations from the read_info_ptr. The automatically
1329 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1330 * because they are reset from the write pointer (removed in 1.6.0).
1331 */
1332 {
1333 int i;
1334 for (i = 0; i < num_unknowns; i++)
1335 png_set_unknown_chunk_location(write_ptr, write_info_ptr, i,
1336 unknowns[i].location);
1337 }
1338 #endif
1339 }
1340 }
1341 #endif
1342
1343 #ifdef PNG_WRITE_SUPPORTED
1344 pngtest_debug("Writing info struct");
1345
1346 /* Write the info in two steps so that if we write the 'unknown' chunks here
1347 * they go to the correct place.
1348 */
1349 png_write_info_before_PLTE(write_ptr, write_info_ptr);
1350
1351 write_chunks(write_ptr, before_PLTE); /* before PLTE */
1352
1353 png_write_info(write_ptr, write_info_ptr);
1354
1355 write_chunks(write_ptr, before_IDAT); /* after PLTE */
1356 #endif
1357
1358 #ifdef SINGLE_ROWBUF_ALLOC
1359 pngtest_debug("Allocating row buffer...");
1360 row_buf = (png_bytep)png_malloc(read_ptr,
1361 png_get_rowbytes(read_ptr, read_info_ptr));
1362
1363 pngtest_debug1("\t0x%08lx", (unsigned long)row_buf);
1364 #endif /* SINGLE_ROWBUF_ALLOC */
1365 pngtest_debug("Writing row data");
1366
1367 #ifdef PNG_READ_INTERLACING_SUPPORTED
1368 num_pass = png_set_interlace_handling(read_ptr);
1369 if (png_set_interlace_handling(write_ptr) != num_pass)
1370 png_error(write_ptr, "png_set_interlace_handling: inconsistent num_pass");
1371 #endif
1372
1373 #ifdef PNGTEST_TIMING
1374 t_stop = (float)clock();
1375 t_misc += (t_stop - t_start);
1376 t_start = t_stop;
1377 #endif
1378 for (pass = 0; pass < num_pass; pass++)
1379 {
1380 pngtest_debug1("Writing row data for pass %d", pass);
1381 for (y = 0; y < height; y++)
1382 {
1383 #ifndef SINGLE_ROWBUF_ALLOC
1384 pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y);
1385 row_buf = (png_bytep)png_malloc(read_ptr,
1386 png_get_rowbytes(read_ptr, read_info_ptr));
1387
1388 pngtest_debug2("\t0x%08lx (%u bytes)", (unsigned long)row_buf,
1389 png_get_rowbytes(read_ptr, read_info_ptr));
1390
1391 #endif /* !SINGLE_ROWBUF_ALLOC */
1392 png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1);
1393
1394 #ifdef PNG_WRITE_SUPPORTED
1395 #ifdef PNGTEST_TIMING
1396 t_stop = (float)clock();
1397 t_decode += (t_stop - t_start);
1398 t_start = t_stop;
1399 #endif
1400 png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
1401 #ifdef PNGTEST_TIMING
1402 t_stop = (float)clock();
1403 t_encode += (t_stop - t_start);
1404 t_start = t_stop;
1405 #endif
1406 #endif /* PNG_WRITE_SUPPORTED */
1407
1408 #ifndef SINGLE_ROWBUF_ALLOC
1409 pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y);
1410 png_free(read_ptr, row_buf);
1411 row_buf = NULL;
1412 #endif /* !SINGLE_ROWBUF_ALLOC */
1413 }
1414 }
1415
1416 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
1417 # ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1418 png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1);
1419 # endif
1420 # ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1421 png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
1422 # endif
1423 #endif
1424
1425 pngtest_debug("Reading and writing end_info data");
1426
1427 png_read_end(read_ptr, end_info_ptr);
1428 #ifdef PNG_TEXT_SUPPORTED
1429 {
1430 png_textp text_ptr;
1431 int num_text;
1432
1433 if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
1434 {
1435 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1436
1437 pngtest_check_text_support(read_ptr, text_ptr, num_text);
1438
1439 if (verbose)
1440 {
1441 int i;
1442
1443 printf("\n");
1444 for (i=0; i<num_text; i++)
1445 {
1446 printf(" Text compression[%d]=%d\n",
1447 i, text_ptr[i].compression);
1448 }
1449 }
1450
1451 png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
1452 }
1453 }
1454 #endif
1455 #ifdef PNG_tIME_SUPPORTED
1456 {
1457 png_timep mod_time;
1458
1459 if (png_get_tIME(read_ptr, end_info_ptr, &mod_time))
1460 {
1461 png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
1462 #ifdef PNG_TIME_RFC1123_SUPPORTED
1463 if (png_convert_to_rfc1123_buffer(tIME_string, mod_time))
1464 tIME_string[(sizeof tIME_string) - 1] = '\0';
1465
1466 else
1467 {
1468 strncpy(tIME_string, "*** invalid time ***", sizeof tIME_string);
1469 tIME_string[(sizeof tIME_string)-1] = '\0';
1470 }
1471
1472 tIME_chunk_present++;
1473 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1474 }
1475 }
1476 #endif
1477 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1478 {
1479 png_unknown_chunkp unknowns;
1480 int num_unknowns = png_get_unknown_chunks(read_ptr, end_info_ptr,
1481 &unknowns);
1482
1483 if (num_unknowns)
1484 {
1485 png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns,
1486 num_unknowns);
1487 #if PNG_LIBPNG_VER < 10600
1488 /* Copy the locations from the read_info_ptr. The automatically
1489 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1490 * because they are reset from the write pointer (removed in 1.6.0).
1491 */
1492 {
1493 int i;
1494 for (i = 0; i < num_unknowns; i++)
1495 png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i,
1496 unknowns[i].location);
1497 }
1498 #endif
1499 }
1500 }
1501 #endif
1502
1503 #ifdef PNG_WRITE_SUPPORTED
1504 #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
1505 /* Normally one would use Z_DEFAULT_STRATEGY for text compression.
1506 * This is here just to make pngtest replicate the results from libpng
1507 * versions prior to 1.5.4, and to test this new API.
1508 */
1509 png_set_text_compression_strategy(write_ptr, Z_FILTERED);
1510 #endif
1511
1512 /* When the unknown vpAg/sTER chunks are written by pngtest the only way to
1513 * do it is to write them *before* calling png_write_end. When unknown
1514 * chunks are written by libpng, however, they are written just before IEND.
1515 * There seems to be no way round this, however vpAg/sTER are not expected
1516 * after IDAT.
1517 */
1518 write_chunks(write_ptr, after_IDAT);
1519
1520 png_write_end(write_ptr, write_end_info_ptr);
1521 #endif
1522
1523 #ifdef PNG_EASY_ACCESS_SUPPORTED
1524 if (verbose)
1525 {
1526 png_uint_32 iwidth, iheight;
1527 iwidth = png_get_image_width(write_ptr, write_info_ptr);
1528 iheight = png_get_image_height(write_ptr, write_info_ptr);
1529 fprintf(STDERR, "\n Image width = %lu, height = %lu\n",
1530 (unsigned long)iwidth, (unsigned long)iheight);
1531 }
1532 #endif
1533
1534 pngtest_debug("Destroying data structs");
1535 #ifdef SINGLE_ROWBUF_ALLOC
1536 pngtest_debug("destroying row_buf for read_ptr");
1537 png_free(read_ptr, row_buf);
1538 row_buf = NULL;
1539 #endif /* SINGLE_ROWBUF_ALLOC */
1540 pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr");
1541 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
1542 #ifdef PNG_WRITE_SUPPORTED
1543 pngtest_debug("destroying write_end_info_ptr");
1544 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
1545 pngtest_debug("destroying write_ptr, write_info_ptr");
1546 png_destroy_write_struct(&write_ptr, &write_info_ptr);
1547 #endif
1548 pngtest_debug("Destruction complete.");
1549
1550 FCLOSE(fpin);
1551 FCLOSE(fpout);
1552
1553 /* Summarize any warnings or errors and in 'strict' mode fail the test.
1554 * Unsupported chunks can result in warnings, in that case ignore the strict
1555 * setting, otherwise fail the test on warnings as well as errors.
1556 */
1557 if (error_count > 0)
1558 {
1559 /* We don't really expect to get here because of the setjmp handling
1560 * above, but this is safe.
1561 */
1562 fprintf(STDERR, "\n %s: %d libpng errors found (%d warnings)",
1563 inname, error_count, warning_count);
1564
1565 if (strict != 0)
1566 return (1);
1567 }
1568
1569 # ifdef PNG_WRITE_SUPPORTED
1570 /* If there we no write support nothing was written! */
1571 else if (unsupported_chunks > 0)
1572 {
1573 fprintf(STDERR, "\n %s: unsupported chunks (%d)%s",
1574 inname, unsupported_chunks, strict ? ": IGNORED --strict!" : "");
1575 }
1576 # endif
1577
1578 else if (warning_count > 0)
1579 {
1580 fprintf(STDERR, "\n %s: %d libpng warnings found",
1581 inname, warning_count);
1582
1583 if (strict != 0)
1584 return (1);
1585 }
1586
1587 pngtest_debug("Opening files for comparison");
1588 if ((fpin = fopen(inname, "rb")) == NULL)
1589 {
1590 fprintf(STDERR, "Could not find file %s\n", inname);
1591 return (1);
1592 }
1593
1594 if ((fpout = fopen(outname, "rb")) == NULL)
1595 {
1596 fprintf(STDERR, "Could not find file %s\n", outname);
1597 FCLOSE(fpin);
1598 return (1);
1599 }
1600
1601 #ifdef PNG_WRITE_SUPPORTED /* else nothing was written */
1602 if (interlace_preserved) /* else the files will be changed */
1603 {
1604 for (;;)
1605 {
1606 static int wrote_question = 0;
1607 png_size_t num_in, num_out;
1608 char inbuf[256], outbuf[256];
1609
1610 num_in = fread(inbuf, 1, sizeof inbuf, fpin);
1611 num_out = fread(outbuf, 1, sizeof outbuf, fpout);
1612
1613 if (num_in != num_out)
1614 {
1615 fprintf(STDERR, "\nFiles %s and %s are of a different size\n",
1616 inname, outname);
1617
1618 if (wrote_question == 0 && unsupported_chunks == 0)
1619 {
1620 fprintf(STDERR,
1621 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1622 inname, PNG_ZBUF_SIZE);
1623 fprintf(STDERR,
1624 "\n filtering heuristic (libpng default), compression");
1625 fprintf(STDERR,
1626 " level (zlib default),\n and zlib version (%s)?\n\n",
1627 ZLIB_VERSION);
1628 wrote_question = 1;
1629 }
1630
1631 FCLOSE(fpin);
1632 FCLOSE(fpout);
1633
1634 if (strict != 0 && unsupported_chunks == 0)
1635 return (1);
1636
1637 else
1638 return (0);
1639 }
1640
1641 if (!num_in)
1642 break;
1643
1644 if (memcmp(inbuf, outbuf, num_in))
1645 {
1646 fprintf(STDERR, "\nFiles %s and %s are different\n", inname,
1647 outname);
1648
1649 if (wrote_question == 0 && unsupported_chunks == 0)
1650 {
1651 fprintf(STDERR,
1652 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1653 inname, PNG_ZBUF_SIZE);
1654 fprintf(STDERR,
1655 "\n filtering heuristic (libpng default), compression");
1656 fprintf(STDERR,
1657 " level (zlib default),\n and zlib version (%s)?\n\n",
1658 ZLIB_VERSION);
1659 wrote_question = 1;
1660 }
1661
1662 FCLOSE(fpin);
1663 FCLOSE(fpout);
1664
1665 /* NOTE: the unsupported_chunks escape is permitted here because
1666 * unsupported text chunk compression will result in the compression
1667 * mode being changed (to NONE) yet, in the test case, the result
1668 * can be exactly the same size!
1669 */
1670 if (strict != 0 && unsupported_chunks == 0)
1671 return (1);
1672
1673 else
1674 return (0);
1675 }
1676 }
1677 }
1678 #endif /* PNG_WRITE_SUPPORTED */
1679
1680 FCLOSE(fpin);
1681 FCLOSE(fpout);
1682
1683 return (0);
1684 }
1685
1686 /* Input and output filenames */
1687 #ifdef RISCOS
1688 static PNG_CONST char *inname = "pngtest/png";
1689 static PNG_CONST char *outname = "pngout/png";
1690 #else
1691 static PNG_CONST char *inname = "pngtest.png";
1692 static PNG_CONST char *outname = "pngout.png";
1693 #endif
1694
1695 int
1696 main(int argc, char *argv[])
1697 {
1698 int multiple = 0;
1699 int ierror = 0;
1700
1701 fprintf(STDERR, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
1702 fprintf(STDERR, " with zlib version %s\n", ZLIB_VERSION);
1703 fprintf(STDERR, "%s", png_get_copyright(NULL));
1704 /* Show the version of libpng used in building the library */
1705 fprintf(STDERR, " library (%lu):%s",
1706 (unsigned long)png_access_version_number(),
1707 png_get_header_version(NULL));
1708
1709 /* Show the version of libpng used in building the application */
1710 fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
1711 PNG_HEADER_VERSION_STRING);
1712
1713 /* Do some consistency checking on the memory allocation settings, I'm
1714 * not sure this matters, but it is nice to know, the first of these
1715 * tests should be impossible because of the way the macros are set
1716 * in pngconf.h
1717 */
1718 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1719 fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n");
1720 #endif
1721 /* I think the following can happen. */
1722 #if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1723 fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n");
1724 #endif
1725
1726 if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING))
1727 {
1728 fprintf(STDERR,
1729 "Warning: versions are different between png.h and png.c\n");
1730 fprintf(STDERR, " png.h version: %s\n", PNG_LIBPNG_VER_STRING);
1731 fprintf(STDERR, " png.c version: %s\n\n", png_libpng_ver);
1732 ++ierror;
1733 }
1734
1735 if (argc > 1)
1736 {
1737 if (strcmp(argv[1], "-m") == 0)
1738 {
1739 multiple = 1;
1740 status_dots_requested = 0;
1741 }
1742
1743 else if (strcmp(argv[1], "-mv") == 0 ||
1744 strcmp(argv[1], "-vm") == 0 )
1745 {
1746 multiple = 1;
1747 verbose = 1;
1748 status_dots_requested = 1;
1749 }
1750
1751 else if (strcmp(argv[1], "-v") == 0)
1752 {
1753 verbose = 1;
1754 status_dots_requested = 1;
1755 inname = argv[2];
1756 }
1757
1758 else if (strcmp(argv[1], "--strict") == 0)
1759 {
1760 status_dots_requested = 0;
1761 verbose = 1;
1762 inname = argv[2];
1763 strict++;
1764 relaxed = 0;
1765 }
1766
1767 else if (strcmp(argv[1], "--relaxed") == 0)
1768 {
1769 status_dots_requested = 0;
1770 verbose = 1;
1771 inname = argv[2];
1772 strict = 0;
1773 relaxed++;
1774 }
1775
1776 else
1777 {
1778 inname = argv[1];
1779 status_dots_requested = 0;
1780 }
1781 }
1782
1783 if (!multiple && argc == 3 + verbose)
1784 outname = argv[2 + verbose];
1785
1786 if ((!multiple && argc > 3 + verbose) || (multiple && argc < 2))
1787 {
1788 fprintf(STDERR,
1789 "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
1790 argv[0], argv[0]);
1791 fprintf(STDERR,
1792 " reads/writes one PNG file (without -m) or multiple files (-m)\n");
1793 fprintf(STDERR,
1794 " with -m %s is used as a temporary file\n", outname);
1795 exit(1);
1796 }
1797
1798 if (multiple)
1799 {
1800 int i;
1801 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1802 int allocation_now = current_allocation;
1803 #endif
1804 for (i=2; i<argc; ++i)
1805 {
1806 int kerror;
1807 fprintf(STDERR, "\n Testing %s:", argv[i]);
1808 kerror = test_one_file(argv[i], outname);
1809 if (kerror == 0)
1810 {
1811 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1812 int k;
1813 #endif
1814 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1815 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1816 (unsigned long)zero_samples);
1817 #else
1818 fprintf(STDERR, " PASS\n");
1819 #endif
1820 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1821 for (k = 0; k<256; k++)
1822 if (filters_used[k])
1823 fprintf(STDERR, " Filter %d was used %lu times\n",
1824 k, (unsigned long)filters_used[k]);
1825 #endif
1826 #ifdef PNG_TIME_RFC1123_SUPPORTED
1827 if (tIME_chunk_present != 0)
1828 fprintf(STDERR, " tIME = %s\n", tIME_string);
1829
1830 tIME_chunk_present = 0;
1831 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1832 }
1833
1834 else
1835 {
1836 fprintf(STDERR, " FAIL\n");
1837 ierror += kerror;
1838 }
1839 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1840 if (allocation_now != current_allocation)
1841 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1842 current_allocation - allocation_now);
1843
1844 if (current_allocation != 0)
1845 {
1846 memory_infop pinfo = pinformation;
1847
1848 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1849 current_allocation);
1850
1851 while (pinfo != NULL)
1852 {
1853 fprintf(STDERR, " %lu bytes at %x\n",
1854 (unsigned long)pinfo->size,
1855 (unsigned int)pinfo->pointer);
1856 pinfo = pinfo->next;
1857 }
1858 }
1859 #endif
1860 }
1861 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1862 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1863 current_allocation);
1864 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1865 maximum_allocation);
1866 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1867 total_allocation);
1868 fprintf(STDERR, " Number of allocations: %10d\n",
1869 num_allocations);
1870 #endif
1871 }
1872
1873 else
1874 {
1875 int i;
1876 for (i = 0; i<3; ++i)
1877 {
1878 int kerror;
1879 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1880 int allocation_now = current_allocation;
1881 #endif
1882 if (i == 1)
1883 status_dots_requested = 1;
1884
1885 else if (verbose == 0)
1886 status_dots_requested = 0;
1887
1888 if (i == 0 || verbose == 1 || ierror != 0)
1889 fprintf(STDERR, "\n Testing %s:", inname);
1890
1891 kerror = test_one_file(inname, outname);
1892
1893 if (kerror == 0)
1894 {
1895 if (verbose == 1 || i == 2)
1896 {
1897 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1898 int k;
1899 #endif
1900 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1901 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1902 (unsigned long)zero_samples);
1903 #else
1904 fprintf(STDERR, " PASS\n");
1905 #endif
1906 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1907 for (k = 0; k<256; k++)
1908 if (filters_used[k])
1909 fprintf(STDERR, " Filter %d was used %lu times\n",
1910 k, (unsigned long)filters_used[k]);
1911 #endif
1912 #ifdef PNG_TIME_RFC1123_SUPPORTED
1913 if (tIME_chunk_present != 0)
1914 fprintf(STDERR, " tIME = %s\n", tIME_string);
1915 #endif /* PNG_TIME_RFC1123_SUPPORTED */
1916 }
1917 }
1918
1919 else
1920 {
1921 if (verbose == 0 && i != 2)
1922 fprintf(STDERR, "\n Testing %s:", inname);
1923
1924 fprintf(STDERR, " FAIL\n");
1925 ierror += kerror;
1926 }
1927 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1928 if (allocation_now != current_allocation)
1929 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1930 current_allocation - allocation_now);
1931
1932 if (current_allocation != 0)
1933 {
1934 memory_infop pinfo = pinformation;
1935
1936 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1937 current_allocation);
1938
1939 while (pinfo != NULL)
1940 {
1941 fprintf(STDERR, " %lu bytes at %x\n",
1942 (unsigned long)pinfo->size, (unsigned int)pinfo->pointer);
1943 pinfo = pinfo->next;
1944 }
1945 }
1946 #endif
1947 }
1948 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1949 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1950 current_allocation);
1951 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1952 maximum_allocation);
1953 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1954 total_allocation);
1955 fprintf(STDERR, " Number of allocations: %10d\n",
1956 num_allocations);
1957 #endif
1958 }
1959
1960 #ifdef PNGTEST_TIMING
1961 t_stop = (float)clock();
1962 t_misc += (t_stop - t_start);
1963 t_start = t_stop;
1964 fprintf(STDERR, " CPU time used = %.3f seconds",
1965 (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC);
1966 fprintf(STDERR, " (decoding %.3f,\n",
1967 t_decode/(float)CLOCKS_PER_SEC);
1968 fprintf(STDERR, " encoding %.3f ,",
1969 t_encode/(float)CLOCKS_PER_SEC);
1970 fprintf(STDERR, " other %.3f seconds)\n\n",
1971 t_misc/(float)CLOCKS_PER_SEC);
1972 #endif
1973
1974 if (ierror == 0)
1975 fprintf(STDERR, " libpng passes test\n");
1976
1977 else
1978 fprintf(STDERR, " libpng FAILS test\n");
1979
1980 return (int)(ierror != 0);
1981 }
1982 #else
1983 int
1984 main(void)
1985 {
1986 fprintf(STDERR,
1987 " test ignored because libpng was not built with read support\n");
1988 /* And skip this test */
1989 return PNG_LIBPNG_VER < 10600 ? 0 : 77;
1990 }
1991 #endif
1992
1993 /* Generate a compiler error if there is an old png.h in the search path. */
1994 typedef png_libpng_version_1_6_10 Your_png_h_is_not_version_1_6_10;