1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation. Oracle designates this
7 * particular file as subject to the "Classpath" exception as provided
8 * by Oracle in the LICENSE file that accompanied this code.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25 /* pngtest.c - a simple test program to test libpng
26 *
27 * This file is available under and governed by the GNU General Public
28 * License version 2 only, as published by the Free Software Foundation.
29 * However, the following notice accompanied the original version of this
30 * file and, per its terms, should not be removed:
31 *
32 * Last changed in libpng 1.5.25 [December 3, 2015]
33 * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
34 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
35 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
36 *
37 * This code is released under the libpng license.
38 * For conditions of distribution and use, see the disclaimer
39 * and license in png.h
40 *
41 * This program reads in a PNG image, writes it out again, and then
42 * compares the two files. If the files are identical, this shows that
43 * the basic chunk handling, filtering, and (de)compression code is working
44 * properly. It does not currently test all of the transforms, although
45 * it probably should.
46 *
47 * The program will report "FAIL" in certain legitimate cases:
48 * 1) when the compression level or filter selection method is changed.
49 * 2) when the maximum IDAT size (PNG_ZBUF_SIZE in pngconf.h) is not 8192.
50 * 3) unknown unsafe-to-copy ancillary chunks or unknown critical chunks
51 * exist in the input file.
52 * 4) others not listed here...
53 * In these cases, it is best to check with another tool such as "pngcheck"
54 * to see what the differences between the two files are.
55 *
56 * If a filename is given on the command-line, then this file is used
57 * for the input, rather than the default "pngtest.png". This allows
58 * testing a wide variety of files easily. You can also test a number
59 * of files at once by typing "pngtest -m file1.png file2.png ..."
60 */
61
62 #define _POSIX_SOURCE 1
63
64 #include <stdio.h>
65 #include <stdlib.h>
66 #include <string.h>
67
68 /* Defined so I can write to a file on gui/windowing platforms */
69 /* #define STDERR stderr */
70 #define STDERR stdout /* For DOS */
71
72 #include "png.h"
73
74 /* 1.6.1 added support for the configure test harness, which uses 77 to indicate
75 * a skipped test, in earlier versions we need to succeed on a skipped test, so:
76 */
77 #if PNG_LIBPNG_VER >= 10601 && defined(HAVE_CONFIG_H)
78 # define SKIP 77
79 #else
80 # define SKIP 0
81 #endif
82
83 /* Known chunks that exist in pngtest.png must be supported or pngtest will fail
84 * simply as a result of re-ordering them. This may be fixed in 1.7
85 *
86 * pngtest allocates a single row buffer for each row and overwrites it,
87 * therefore if the write side doesn't support the writing of interlaced images
88 * nothing can be done for an interlaced image (and the code below will fail
89 * horribly trying to write extra data after writing garbage).
90 */
91 #if defined PNG_READ_SUPPORTED && /* else nothing can be done */\
92 defined PNG_READ_bKGD_SUPPORTED &&\
93 defined PNG_READ_cHRM_SUPPORTED &&\
94 defined PNG_READ_gAMA_SUPPORTED &&\
95 defined PNG_READ_oFFs_SUPPORTED &&\
96 defined PNG_READ_pCAL_SUPPORTED &&\
97 defined PNG_READ_pHYs_SUPPORTED &&\
98 defined PNG_READ_sBIT_SUPPORTED &&\
99 defined PNG_READ_sCAL_SUPPORTED &&\
100 defined PNG_READ_sRGB_SUPPORTED &&\
101 defined PNG_READ_sPLT_SUPPORTED &&\
102 defined PNG_READ_tEXt_SUPPORTED &&\
103 defined PNG_READ_tIME_SUPPORTED &&\
104 defined PNG_READ_zTXt_SUPPORTED &&\
105 (defined PNG_WRITE_INTERLACING_SUPPORTED || PNG_LIBPNG_VER >= 10700)
106
107 #ifdef PNG_ZLIB_HEADER
108 # include PNG_ZLIB_HEADER /* defined by pnglibconf.h from 1.7 */
109 #else
110 # include "zlib.h"
111 #endif
112
113 /* Copied from pngpriv.h but only used in error messages below. */
114 #ifndef PNG_ZBUF_SIZE
115 # define PNG_ZBUF_SIZE 8192
116 #endif
117 #define FCLOSE(file) fclose(file)
118
119 #ifndef PNG_STDIO_SUPPORTED
120 typedef FILE * png_FILE_p;
121 #endif
122
123 /* Makes pngtest verbose so we can find problems. */
124 #ifndef PNG_DEBUG
125 # define PNG_DEBUG 0
126 #endif
127
128 #if PNG_DEBUG > 1
129 # define pngtest_debug(m) ((void)fprintf(stderr, m "\n"))
130 # define pngtest_debug1(m,p1) ((void)fprintf(stderr, m "\n", p1))
131 # define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2))
132 #else
133 # define pngtest_debug(m) ((void)0)
134 # define pngtest_debug1(m,p1) ((void)0)
135 # define pngtest_debug2(m,p1,p2) ((void)0)
136 #endif
137
138 #if !PNG_DEBUG
139 # define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */
140 #endif
141
142 #ifndef PNG_UNUSED
143 # define PNG_UNUSED(param) (void)param;
144 #endif
145
146 /* Turn on CPU timing
147 #define PNGTEST_TIMING
148 */
149
150 #ifndef PNG_FLOATING_POINT_SUPPORTED
151 #undef PNGTEST_TIMING
152 #endif
153
154 #ifdef PNGTEST_TIMING
155 static float t_start, t_stop, t_decode, t_encode, t_misc;
156 #include <time.h>
157 #endif
158
159 #ifdef PNG_TIME_RFC1123_SUPPORTED
160 #define PNG_tIME_STRING_LENGTH 29
161 static int tIME_chunk_present = 0;
162 static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present";
163
164 #if PNG_LIBPNG_VER < 10619
165 #define png_convert_to_rfc1123_buffer(ts, t) tIME_to_str(read_ptr, ts, t)
166
167 static int
168 tIME_to_str(png_structp png_ptr, png_charp ts, png_const_timep t)
169 {
170 png_const_charp str = png_convert_to_rfc1123(png_ptr, t);
171
172 if (str == NULL)
173 return 0;
174
175 strcpy(ts, str);
176 return 1;
177 }
178 #endif /* older libpng */
179 #endif
180
181 static int verbose = 0;
182 static int strict = 0;
183 static int relaxed = 0;
184 static int unsupported_chunks = 0; /* chunk unsupported by libpng in input */
185 static int error_count = 0; /* count calls to png_error */
186 static int warning_count = 0; /* count calls to png_warning */
187
188 /* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
189 #ifndef png_jmpbuf
190 # define png_jmpbuf(png_ptr) png_ptr->jmpbuf
191 #endif
192
193 /* Defines for unknown chunk handling if required. */
194 #ifndef PNG_HANDLE_CHUNK_ALWAYS
195 # define PNG_HANDLE_CHUNK_ALWAYS 3
196 #endif
197 #ifndef PNG_HANDLE_CHUNK_IF_SAFE
198 # define PNG_HANDLE_CHUNK_IF_SAFE 2
199 #endif
200
201 /* Utility to save typing/errors, the argument must be a name */
202 #define MEMZERO(var) ((void)memset(&var, 0, sizeof var))
203
204 /* Example of using row callbacks to make a simple progress meter */
205 static int status_pass = 1;
206 static int status_dots_requested = 0;
207 static int status_dots = 1;
208
209 static void PNGCBAPI
210 read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
211 {
212 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX)
213 return;
214
215 if (status_pass != pass)
216 {
217 fprintf(stdout, "\n Pass %d: ", pass);
218 status_pass = pass;
219 status_dots = 31;
220 }
221
222 status_dots--;
223
224 if (status_dots == 0)
225 {
226 fprintf(stdout, "\n ");
227 status_dots=30;
228 }
229
230 fprintf(stdout, "r");
231 }
232
233 #ifdef PNG_WRITE_SUPPORTED
234 static void PNGCBAPI
235 write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
236 {
237 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7)
238 return;
239
240 fprintf(stdout, "w");
241 }
242 #endif
243
244
245 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
246 /* Example of using a user transform callback (doesn't do anything at present).
247 */
248 static void PNGCBAPI
249 read_user_callback(png_structp png_ptr, png_row_infop row_info, png_bytep data)
250 {
251 PNG_UNUSED(png_ptr)
252 PNG_UNUSED(row_info)
253 PNG_UNUSED(data)
254 }
255 #endif
256
257 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
258 /* Example of using user transform callback (we don't transform anything,
259 * but merely count the zero samples)
260 */
261
262 static png_uint_32 zero_samples;
263
264 static void PNGCBAPI
265 count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
266 {
267 png_bytep dp = data;
268 if (png_ptr == NULL)
269 return;
270
271 /* Contents of row_info:
272 * png_uint_32 width width of row
273 * png_uint_32 rowbytes number of bytes in row
274 * png_byte color_type color type of pixels
275 * png_byte bit_depth bit depth of samples
276 * png_byte channels number of channels (1-4)
277 * png_byte pixel_depth bits per pixel (depth*channels)
278 */
279
280 /* Counts the number of zero samples (or zero pixels if color_type is 3 */
281
282 if (row_info->color_type == 0 || row_info->color_type == 3)
283 {
284 int pos = 0;
285 png_uint_32 n, nstop;
286
287 for (n = 0, nstop=row_info->width; n<nstop; n++)
288 {
289 if (row_info->bit_depth == 1)
290 {
291 if (((*dp << pos++ ) & 0x80) == 0)
292 zero_samples++;
293
294 if (pos == 8)
295 {
296 pos = 0;
297 dp++;
298 }
299 }
300
301 if (row_info->bit_depth == 2)
302 {
303 if (((*dp << (pos+=2)) & 0xc0) == 0)
304 zero_samples++;
305
306 if (pos == 8)
307 {
308 pos = 0;
309 dp++;
310 }
311 }
312
313 if (row_info->bit_depth == 4)
314 {
315 if (((*dp << (pos+=4)) & 0xf0) == 0)
316 zero_samples++;
317
318 if (pos == 8)
319 {
320 pos = 0;
321 dp++;
322 }
323 }
324
325 if (row_info->bit_depth == 8)
326 if (*dp++ == 0)
327 zero_samples++;
328
329 if (row_info->bit_depth == 16)
330 {
331 if ((*dp | *(dp+1)) == 0)
332 zero_samples++;
333 dp+=2;
334 }
335 }
336 }
337 else /* Other color types */
338 {
339 png_uint_32 n, nstop;
340 int channel;
341 int color_channels = row_info->channels;
342 if (row_info->color_type > 3)
343 color_channels--;
344
345 for (n = 0, nstop=row_info->width; n<nstop; n++)
346 {
347 for (channel = 0; channel < color_channels; channel++)
348 {
349 if (row_info->bit_depth == 8)
350 if (*dp++ == 0)
351 zero_samples++;
352
353 if (row_info->bit_depth == 16)
354 {
355 if ((*dp | *(dp+1)) == 0)
356 zero_samples++;
357
358 dp+=2;
359 }
360 }
361 if (row_info->color_type > 3)
362 {
363 dp++;
364 if (row_info->bit_depth == 16)
365 dp++;
366 }
367 }
368 }
369 }
370 #endif /* WRITE_USER_TRANSFORM */
371
372 #ifndef PNG_STDIO_SUPPORTED
373 /* START of code to validate stdio-free compilation */
374 /* These copies of the default read/write functions come from pngrio.c and
375 * pngwio.c. They allow "don't include stdio" testing of the library.
376 * This is the function that does the actual reading of data. If you are
377 * not reading from a standard C stream, you should create a replacement
378 * read_data function and use it at run time with png_set_read_fn(), rather
379 * than changing the library.
380 */
381
382 #ifdef PNG_IO_STATE_SUPPORTED
383 void
384 pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
385 png_uint_32 io_op);
386 void
387 pngtest_check_io_state(png_structp png_ptr, png_size_t data_length,
388 png_uint_32 io_op)
389 {
390 png_uint_32 io_state = png_get_io_state(png_ptr);
391 int err = 0;
392
393 /* Check if the current operation (reading / writing) is as expected. */
394 if ((io_state & PNG_IO_MASK_OP) != io_op)
395 png_error(png_ptr, "Incorrect operation in I/O state");
396
397 /* Check if the buffer size specific to the current location
398 * (file signature / header / data / crc) is as expected.
399 */
400 switch (io_state & PNG_IO_MASK_LOC)
401 {
402 case PNG_IO_SIGNATURE:
403 if (data_length > 8)
404 err = 1;
405 break;
406 case PNG_IO_CHUNK_HDR:
407 if (data_length != 8)
408 err = 1;
409 break;
410 case PNG_IO_CHUNK_DATA:
411 break; /* no restrictions here */
412 case PNG_IO_CHUNK_CRC:
413 if (data_length != 4)
414 err = 1;
415 break;
416 default:
417 err = 1; /* uninitialized */
418 }
419 if (err != 0)
420 png_error(png_ptr, "Bad I/O state or buffer size");
421 }
422 #endif
423
424 static void PNGCBAPI
425 pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
426 {
427 png_size_t check = 0;
428 png_voidp io_ptr;
429
430 /* fread() returns 0 on error, so it is OK to store this in a png_size_t
431 * instead of an int, which is what fread() actually returns.
432 */
433 io_ptr = png_get_io_ptr(png_ptr);
434 if (io_ptr != NULL)
435 {
436 check = fread(data, 1, length, (png_FILE_p)io_ptr);
437 }
438
439 if (check != length)
440 {
441 png_error(png_ptr, "Read Error");
442 }
443
444 #ifdef PNG_IO_STATE_SUPPORTED
445 pngtest_check_io_state(png_ptr, length, PNG_IO_READING);
446 #endif
447 }
448
449 #ifdef PNG_WRITE_FLUSH_SUPPORTED
450 static void PNGCBAPI
451 pngtest_flush(png_structp png_ptr)
452 {
453 /* Do nothing; fflush() is said to be just a waste of energy. */
454 PNG_UNUSED(png_ptr) /* Stifle compiler warning */
455 }
456 #endif
457
458 /* This is the function that does the actual writing of data. If you are
459 * not writing to a standard C stream, you should create a replacement
460 * write_data function and use it at run time with png_set_write_fn(), rather
461 * than changing the library.
462 */
463 static void PNGCBAPI
464 pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
465 {
466 png_size_t check;
467
468 check = fwrite(data, 1, length, (png_FILE_p)png_get_io_ptr(png_ptr));
469
470 if (check != length)
471 {
472 png_error(png_ptr, "Write Error");
473 }
474
475 #ifdef PNG_IO_STATE_SUPPORTED
476 pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING);
477 #endif
478 }
479 #endif /* !STDIO */
480
481 /* This function is called when there is a warning, but the library thinks
482 * it can continue anyway. Replacement functions don't have to do anything
483 * here if you don't want to. In the default configuration, png_ptr is
484 * not used, but it is passed in case it may be useful.
485 */
486 typedef struct
487 {
488 PNG_CONST char *file_name;
489 } pngtest_error_parameters;
490
491 static void PNGCBAPI
492 pngtest_warning(png_structp png_ptr, png_const_charp message)
493 {
494 PNG_CONST char *name = "UNKNOWN (ERROR!)";
495 pngtest_error_parameters *test =
496 (pngtest_error_parameters*)png_get_error_ptr(png_ptr);
497
498 ++warning_count;
499
500 if (test != NULL && test->file_name != NULL)
501 name = test->file_name;
502
503 fprintf(STDERR, "%s: libpng warning: %s\n", name, message);
504 }
505
506 /* This is the default error handling function. Note that replacements for
507 * this function MUST NOT RETURN, or the program will likely crash. This
508 * function is used by default, or if the program supplies NULL for the
509 * error function pointer in png_set_error_fn().
510 */
511 static void PNGCBAPI
512 pngtest_error(png_structp png_ptr, png_const_charp message)
513 {
514 ++error_count;
515
516 pngtest_warning(png_ptr, message);
517 /* We can return because png_error calls the default handler, which is
518 * actually OK in this case.
519 */
520 }
521
522 /* END of code to validate stdio-free compilation */
523
524 /* START of code to validate memory allocation and deallocation */
525 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
526
527 /* Allocate memory. For reasonable files, size should never exceed
528 * 64K. However, zlib may allocate more than 64K if you don't tell
529 * it not to. See zconf.h and png.h for more information. zlib does
530 * need to allocate exactly 64K, so whatever you call here must
531 * have the ability to do that.
532 *
533 * This piece of code can be compiled to validate max 64K allocations
534 * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K.
535 */
536 typedef struct memory_information
537 {
538 png_alloc_size_t size;
539 png_voidp pointer;
540 struct memory_information *next;
541 } memory_information;
542 typedef memory_information *memory_infop;
543
544 static memory_infop pinformation = NULL;
545 static int current_allocation = 0;
546 static int maximum_allocation = 0;
547 static int total_allocation = 0;
548 static int num_allocations = 0;
549
550 png_voidp PNGCBAPI png_debug_malloc PNGARG((png_structp png_ptr,
551 png_alloc_size_t size));
552 void PNGCBAPI png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr));
553
554 png_voidp
555 PNGCBAPI png_debug_malloc(png_structp png_ptr, png_alloc_size_t size)
556 {
557
558 /* png_malloc has already tested for NULL; png_create_struct calls
559 * png_debug_malloc directly, with png_ptr == NULL which is OK
560 */
561
562 if (size == 0)
563 return (NULL);
564
565 /* This calls the library allocator twice, once to get the requested
566 buffer and once to get a new free list entry. */
567 {
568 /* Disable malloc_fn and free_fn */
569 memory_infop pinfo;
570 png_set_mem_fn(png_ptr, NULL, NULL, NULL);
571 pinfo = (memory_infop)png_malloc(png_ptr,
572 (sizeof *pinfo));
573 pinfo->size = size;
574 current_allocation += size;
575 total_allocation += size;
576 num_allocations ++;
577
578 if (current_allocation > maximum_allocation)
579 maximum_allocation = current_allocation;
580
581 pinfo->pointer = png_malloc(png_ptr, size);
582 /* Restore malloc_fn and free_fn */
583
584 png_set_mem_fn(png_ptr,
585 NULL, png_debug_malloc, png_debug_free);
586
587 if (size != 0 && pinfo->pointer == NULL)
588 {
589 current_allocation -= size;
590 total_allocation -= size;
591 png_error(png_ptr,
592 "out of memory in pngtest->png_debug_malloc");
593 }
594
595 pinfo->next = pinformation;
596 pinformation = pinfo;
597 /* Make sure the caller isn't assuming zeroed memory. */
598 memset(pinfo->pointer, 0xdd, pinfo->size);
599
600 if (verbose != 0)
601 printf("png_malloc %lu bytes at %p\n", (unsigned long)size,
602 pinfo->pointer);
603
604 return (png_voidp)(pinfo->pointer);
605 }
606 }
607
608 /* Free a pointer. It is removed from the list at the same time. */
609 void PNGCBAPI
610 png_debug_free(png_structp png_ptr, png_voidp ptr)
611 {
612 if (png_ptr == NULL)
613 fprintf(STDERR, "NULL pointer to png_debug_free.\n");
614
615 if (ptr == 0)
616 {
617 #if 0 /* This happens all the time. */
618 fprintf(STDERR, "WARNING: freeing NULL pointer\n");
619 #endif
620 return;
621 }
622
623 /* Unlink the element from the list. */
624 if (pinformation != NULL)
625 {
626 memory_infop *ppinfo = &pinformation;
627
628 for (;;)
629 {
630 memory_infop pinfo = *ppinfo;
631
632 if (pinfo->pointer == ptr)
633 {
634 *ppinfo = pinfo->next;
635 current_allocation -= pinfo->size;
636 if (current_allocation < 0)
637 fprintf(STDERR, "Duplicate free of memory\n");
638 /* We must free the list element too, but first kill
639 the memory that is to be freed. */
640 memset(ptr, 0x55, pinfo->size);
641 free(pinfo);
642 pinfo = NULL;
643 break;
644 }
645
646 if (pinfo->next == NULL)
647 {
648 fprintf(STDERR, "Pointer %p not found\n", ptr);
649 break;
650 }
651
652 ppinfo = &pinfo->next;
653 }
654 }
655
656 /* Finally free the data. */
657 if (verbose != 0)
658 printf("Freeing %p\n", ptr);
659
660 if (ptr != NULL)
661 free(ptr);
662 ptr = NULL;
663 }
664 #endif /* USER_MEM && DEBUG */
665 /* END of code to test memory allocation/deallocation */
666
667
668 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
669 /* Demonstration of user chunk support of the sTER and vpAg chunks */
670
671 /* (sTER is a public chunk not yet known by libpng. vpAg is a private
672 chunk used in ImageMagick to store "virtual page" size). */
673
674 static struct user_chunk_data
675 {
676 png_const_infop info_ptr;
677 png_uint_32 vpAg_width, vpAg_height;
678 png_byte vpAg_units;
679 png_byte sTER_mode;
680 int location[2];
681 }
682 user_chunk_data;
683
684 /* Used for location and order; zero means nothing. */
685 #define have_sTER 0x01
686 #define have_vpAg 0x02
687 #define before_PLTE 0x10
688 #define before_IDAT 0x20
689 #define after_IDAT 0x40
690
691 static void
692 init_callback_info(png_const_infop info_ptr)
693 {
694 MEMZERO(user_chunk_data);
695 user_chunk_data.info_ptr = info_ptr;
696 }
697
698 static int
699 set_location(png_structp png_ptr, struct user_chunk_data *data, int what)
700 {
701 int location;
702
703 if ((data->location[0] & what) != 0 || (data->location[1] & what) != 0)
704 return 0; /* already have one of these */
705
706 /* Find where we are (the code below zeroes info_ptr to indicate that the
707 * chunks before the first IDAT have been read.)
708 */
709 if (data->info_ptr == NULL) /* after IDAT */
710 location = what | after_IDAT;
711
712 else if (png_get_valid(png_ptr, data->info_ptr, PNG_INFO_PLTE) != 0)
713 location = what | before_IDAT;
714
715 else
716 location = what | before_PLTE;
717
718 if (data->location[0] == 0)
719 data->location[0] = location;
720
721 else
722 data->location[1] = location;
723
724 return 1; /* handled */
725 }
726
727 static int PNGCBAPI
728 read_user_chunk_callback(png_struct *png_ptr, png_unknown_chunkp chunk)
729 {
730 struct user_chunk_data *my_user_chunk_data =
731 (struct user_chunk_data*)png_get_user_chunk_ptr(png_ptr);
732
733 if (my_user_chunk_data == NULL)
734 png_error(png_ptr, "lost user chunk pointer");
735
736 /* Return one of the following:
737 * return (-n); chunk had an error
738 * return (0); did not recognize
739 * return (n); success
740 *
741 * The unknown chunk structure contains the chunk data:
742 * png_byte name[5];
743 * png_byte *data;
744 * png_size_t size;
745 *
746 * Note that libpng has already taken care of the CRC handling.
747 */
748
749 if (chunk->name[0] == 115 && chunk->name[1] == 84 && /* s T */
750 chunk->name[2] == 69 && chunk->name[3] == 82) /* E R */
751 {
752 /* Found sTER chunk */
753 if (chunk->size != 1)
754 return (-1); /* Error return */
755
756 if (chunk->data[0] != 0 && chunk->data[0] != 1)
757 return (-1); /* Invalid mode */
758
759 if (set_location(png_ptr, my_user_chunk_data, have_sTER) != 0)
760 {
761 my_user_chunk_data->sTER_mode=chunk->data[0];
762 return (1);
763 }
764
765 else
766 return (0); /* duplicate sTER - give it to libpng */
767 }
768
769 if (chunk->name[0] != 118 || chunk->name[1] != 112 || /* v p */
770 chunk->name[2] != 65 || chunk->name[3] != 103) /* A g */
771 return (0); /* Did not recognize */
772
773 /* Found ImageMagick vpAg chunk */
774
775 if (chunk->size != 9)
776 return (-1); /* Error return */
777
778 if (set_location(png_ptr, my_user_chunk_data, have_vpAg) == 0)
779 return (0); /* duplicate vpAg */
780
781 my_user_chunk_data->vpAg_width = png_get_uint_31(png_ptr, chunk->data);
782 my_user_chunk_data->vpAg_height = png_get_uint_31(png_ptr, chunk->data + 4);
783 my_user_chunk_data->vpAg_units = chunk->data[8];
784
785 return (1);
786 }
787
788 #ifdef PNG_WRITE_SUPPORTED
789 static void
790 write_sTER_chunk(png_structp write_ptr)
791 {
792 png_byte sTER[5] = {115, 84, 69, 82, '\0'};
793
794 if (verbose != 0)
795 fprintf(STDERR, "\n stereo mode = %d\n", user_chunk_data.sTER_mode);
796
797 png_write_chunk(write_ptr, sTER, &user_chunk_data.sTER_mode, 1);
798 }
799
800 static void
801 write_vpAg_chunk(png_structp write_ptr)
802 {
803 png_byte vpAg[5] = {118, 112, 65, 103, '\0'};
804
805 png_byte vpag_chunk_data[9];
806
807 if (verbose != 0)
808 fprintf(STDERR, " vpAg = %lu x %lu, units = %d\n",
809 (unsigned long)user_chunk_data.vpAg_width,
810 (unsigned long)user_chunk_data.vpAg_height,
811 user_chunk_data.vpAg_units);
812
813 png_save_uint_32(vpag_chunk_data, user_chunk_data.vpAg_width);
814 png_save_uint_32(vpag_chunk_data + 4, user_chunk_data.vpAg_height);
815 vpag_chunk_data[8] = user_chunk_data.vpAg_units;
816 png_write_chunk(write_ptr, vpAg, vpag_chunk_data, 9);
817 }
818
819 static void
820 write_chunks(png_structp write_ptr, int location)
821 {
822 int i;
823
824 /* Notice that this preserves the original chunk order, however chunks
825 * intercepted by the callback will be written *after* chunks passed to
826 * libpng. This will actually reverse a pair of sTER chunks or a pair of
827 * vpAg chunks, resulting in an error later. This is not worth worrying
828 * about - the chunks should not be duplicated!
829 */
830 for (i=0; i<2; ++i)
831 {
832 if (user_chunk_data.location[i] == (location | have_sTER))
833 write_sTER_chunk(write_ptr);
834
835 else if (user_chunk_data.location[i] == (location | have_vpAg))
836 write_vpAg_chunk(write_ptr);
837 }
838 }
839 #endif /* WRITE */
840 #else /* !READ_USER_CHUNKS */
841 # define write_chunks(pp,loc) ((void)0)
842 #endif
843 /* END of code to demonstrate user chunk support */
844
845 /* START of code to check that libpng has the required text support; this only
846 * checks for the write support because if read support is missing the chunk
847 * will simply not be reported back to pngtest.
848 */
849 #ifdef PNG_TEXT_SUPPORTED
850 static void
851 pngtest_check_text_support(png_structp png_ptr, png_textp text_ptr,
852 int num_text)
853 {
854 while (num_text > 0)
855 {
856 switch (text_ptr[--num_text].compression)
857 {
858 case PNG_TEXT_COMPRESSION_NONE:
859 break;
860
861 case PNG_TEXT_COMPRESSION_zTXt:
862 # ifndef PNG_WRITE_zTXt_SUPPORTED
863 ++unsupported_chunks;
864 /* In libpng 1.7 this now does an app-error, so stop it: */
865 text_ptr[num_text].compression = PNG_TEXT_COMPRESSION_NONE;
866 # endif
867 break;
868
869 case PNG_ITXT_COMPRESSION_NONE:
870 case PNG_ITXT_COMPRESSION_zTXt:
871 # ifndef PNG_WRITE_iTXt_SUPPORTED
872 ++unsupported_chunks;
873 text_ptr[num_text].compression = PNG_TEXT_COMPRESSION_NONE;
874 # endif
875 break;
876
877 default:
878 /* This is an error */
879 png_error(png_ptr, "invalid text chunk compression field");
880 break;
881 }
882 }
883 }
884 #endif
885 /* END of code to check that libpng has the required text support */
886
887 /* Test one file */
888 static int
889 test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
890 {
891 static png_FILE_p fpin;
892 static png_FILE_p fpout; /* "static" prevents setjmp corruption */
893 pngtest_error_parameters error_parameters;
894 png_structp read_ptr;
895 png_infop read_info_ptr, end_info_ptr;
896 #ifdef PNG_WRITE_SUPPORTED
897 png_structp write_ptr;
898 png_infop write_info_ptr;
899 png_infop write_end_info_ptr;
900 #ifdef PNG_WRITE_FILTER_SUPPORTED
901 int interlace_preserved = 1;
902 #endif /* WRITE_FILTER */
903 #else /* !WRITE */
904 png_structp write_ptr = NULL;
905 png_infop write_info_ptr = NULL;
906 png_infop write_end_info_ptr = NULL;
907 #endif /* !WRITE */
908 png_bytep row_buf;
909 png_uint_32 y;
910 png_uint_32 width, height;
911 volatile int num_passes;
912 int pass;
913 int bit_depth, color_type;
914
915 row_buf = NULL;
916 error_parameters.file_name = inname;
917
918 if ((fpin = fopen(inname, "rb")) == NULL)
919 {
920 fprintf(STDERR, "Could not find input file %s\n", inname);
921 return (1);
922 }
923
924 if ((fpout = fopen(outname, "wb")) == NULL)
925 {
926 fprintf(STDERR, "Could not open output file %s\n", outname);
927 FCLOSE(fpin);
928 return (1);
929 }
930
931 pngtest_debug("Allocating read and write structures");
932 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
933 read_ptr =
934 png_create_read_struct_2(PNG_LIBPNG_VER_STRING, NULL,
935 NULL, NULL, NULL, png_debug_malloc, png_debug_free);
936 #else
937 read_ptr =
938 png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
939 #endif
940 png_set_error_fn(read_ptr, &error_parameters, pngtest_error,
941 pngtest_warning);
942
943 #ifdef PNG_WRITE_SUPPORTED
944 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
945 write_ptr =
946 png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL,
947 NULL, NULL, NULL, png_debug_malloc, png_debug_free);
948 #else
949 write_ptr =
950 png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
951 #endif
952 png_set_error_fn(write_ptr, &error_parameters, pngtest_error,
953 pngtest_warning);
954 #endif
955 pngtest_debug("Allocating read_info, write_info and end_info structures");
956 read_info_ptr = png_create_info_struct(read_ptr);
957 end_info_ptr = png_create_info_struct(read_ptr);
958 #ifdef PNG_WRITE_SUPPORTED
959 write_info_ptr = png_create_info_struct(write_ptr);
960 write_end_info_ptr = png_create_info_struct(write_ptr);
961 #endif
962
963 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
964 init_callback_info(read_info_ptr);
965 png_set_read_user_chunk_fn(read_ptr, &user_chunk_data,
966 read_user_chunk_callback);
967 #endif
968
969 #ifdef PNG_SETJMP_SUPPORTED
970 pngtest_debug("Setting jmpbuf for read struct");
971 if (setjmp(png_jmpbuf(read_ptr)))
972 {
973 fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
974 png_free(read_ptr, row_buf);
975 row_buf = NULL;
976 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
977 #ifdef PNG_WRITE_SUPPORTED
978 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
979 png_destroy_write_struct(&write_ptr, &write_info_ptr);
980 #endif
981 FCLOSE(fpin);
982 FCLOSE(fpout);
983 return (1);
984 }
985
986 #ifdef PNG_WRITE_SUPPORTED
987 pngtest_debug("Setting jmpbuf for write struct");
988
989 if (setjmp(png_jmpbuf(write_ptr)))
990 {
991 fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
992 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
993 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
994 #ifdef PNG_WRITE_SUPPORTED
995 png_destroy_write_struct(&write_ptr, &write_info_ptr);
996 #endif
997 FCLOSE(fpin);
998 FCLOSE(fpout);
999 return (1);
1000 }
1001 #endif
1002 #endif
1003
1004 if (strict != 0)
1005 {
1006 /* Treat png_benign_error() as errors on read */
1007 png_set_benign_errors(read_ptr, 0);
1008
1009 #ifdef PNG_WRITE_SUPPORTED
1010 /* Treat them as errors on write */
1011 png_set_benign_errors(write_ptr, 0);
1012 #endif
1013
1014 /* if strict is not set, then app warnings and errors are treated as
1015 * warnings in release builds, but not in unstable builds; this can be
1016 * changed with '--relaxed'.
1017 */
1018 }
1019
1020 else if (relaxed != 0)
1021 {
1022 /* Allow application (pngtest) errors and warnings to pass */
1023 png_set_benign_errors(read_ptr, 1);
1024
1025 #ifdef PNG_WRITE_SUPPORTED
1026 png_set_benign_errors(write_ptr, 1);
1027 #endif
1028 }
1029
1030 pngtest_debug("Initializing input and output streams");
1031 #ifdef PNG_STDIO_SUPPORTED
1032 png_init_io(read_ptr, fpin);
1033 # ifdef PNG_WRITE_SUPPORTED
1034 png_init_io(write_ptr, fpout);
1035 # endif
1036 #else
1037 png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data);
1038 # ifdef PNG_WRITE_SUPPORTED
1039 png_set_write_fn(write_ptr, (png_voidp)fpout, pngtest_write_data,
1040 # ifdef PNG_WRITE_FLUSH_SUPPORTED
1041 pngtest_flush);
1042 # else
1043 NULL);
1044 # endif
1045 # endif
1046 #endif
1047
1048 if (status_dots_requested == 1)
1049 {
1050 #ifdef PNG_WRITE_SUPPORTED
1051 png_set_write_status_fn(write_ptr, write_row_callback);
1052 #endif
1053 png_set_read_status_fn(read_ptr, read_row_callback);
1054 }
1055
1056 else
1057 {
1058 #ifdef PNG_WRITE_SUPPORTED
1059 png_set_write_status_fn(write_ptr, NULL);
1060 #endif
1061 png_set_read_status_fn(read_ptr, NULL);
1062 }
1063
1064 #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1065 png_set_read_user_transform_fn(read_ptr, read_user_callback);
1066 #endif
1067 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1068 zero_samples = 0;
1069 png_set_write_user_transform_fn(write_ptr, count_zero_samples);
1070 #endif
1071
1072 #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
1073 /* Preserve all the unknown chunks, if possible. If this is disabled then,
1074 * even if the png_{get,set}_unknown_chunks stuff is enabled, we can't use
1075 * libpng to *save* the unknown chunks on read (because we can't switch the
1076 * save option on!)
1077 *
1078 * Notice that if SET_UNKNOWN_CHUNKS is *not* supported read will discard all
1079 * unknown chunks and write will write them all.
1080 */
1081 #ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
1082 png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS,
1083 NULL, 0);
1084 #endif
1085 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1086 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS,
1087 NULL, 0);
1088 #endif
1089 #endif
1090
1091 pngtest_debug("Reading info struct");
1092 png_read_info(read_ptr, read_info_ptr);
1093
1094 #ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1095 /* This is a bit of a hack; there is no obvious way in the callback function
1096 * to determine that the chunks before the first IDAT have been read, so
1097 * remove the info_ptr (which is only used to determine position relative to
1098 * PLTE) here to indicate that we are after the IDAT.
1099 */
1100 user_chunk_data.info_ptr = NULL;
1101 #endif
1102
1103 pngtest_debug("Transferring info struct");
1104 {
1105 int interlace_type, compression_type, filter_type;
1106
1107 if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth,
1108 &color_type, &interlace_type, &compression_type, &filter_type) != 0)
1109 {
1110 png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth,
1111 color_type, interlace_type, compression_type, filter_type);
1112 /* num_passes may not be available below if interlace support is not
1113 * provided by libpng for both read and write.
1114 */
1115 switch (interlace_type)
1116 {
1117 case PNG_INTERLACE_NONE:
1118 num_passes = 1;
1119 break;
1120
1121 case PNG_INTERLACE_ADAM7:
1122 num_passes = 7;
1123 break;
1124
1125 default:
1126 png_error(read_ptr, "invalid interlace type");
1127 /*NOT REACHED*/
1128 }
1129 }
1130
1131 else
1132 png_error(read_ptr, "png_get_IHDR failed");
1133 }
1134 #ifdef PNG_FIXED_POINT_SUPPORTED
1135 #ifdef PNG_cHRM_SUPPORTED
1136 {
1137 png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
1138 blue_y;
1139
1140 if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y,
1141 &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y) != 0)
1142 {
1143 png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x,
1144 red_y, green_x, green_y, blue_x, blue_y);
1145 }
1146 }
1147 #endif
1148 #ifdef PNG_gAMA_SUPPORTED
1149 {
1150 png_fixed_point gamma;
1151
1152 if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma) != 0)
1153 png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma);
1154 }
1155 #endif
1156 #else /* Use floating point versions */
1157 #ifdef PNG_FLOATING_POINT_SUPPORTED
1158 #ifdef PNG_cHRM_SUPPORTED
1159 {
1160 double white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
1161 blue_y;
1162
1163 if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
1164 &red_y, &green_x, &green_y, &blue_x, &blue_y) != 0)
1165 {
1166 png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x,
1167 red_y, green_x, green_y, blue_x, blue_y);
1168 }
1169 }
1170 #endif
1171 #ifdef PNG_gAMA_SUPPORTED
1172 {
1173 double gamma;
1174
1175 if (png_get_gAMA(read_ptr, read_info_ptr, &gamma) != 0)
1176 png_set_gAMA(write_ptr, write_info_ptr, gamma);
1177 }
1178 #endif
1179 #endif /* Floating point */
1180 #endif /* Fixed point */
1181 #ifdef PNG_iCCP_SUPPORTED
1182 {
1183 png_charp name;
1184 png_bytep profile;
1185 png_uint_32 proflen;
1186 int compression_type;
1187
1188 if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type,
1189 &profile, &proflen) != 0)
1190 {
1191 png_set_iCCP(write_ptr, write_info_ptr, name, compression_type,
1192 profile, proflen);
1193 }
1194 }
1195 #endif
1196 #ifdef PNG_sRGB_SUPPORTED
1197 {
1198 int intent;
1199
1200 if (png_get_sRGB(read_ptr, read_info_ptr, &intent) != 0)
1201 png_set_sRGB(write_ptr, write_info_ptr, intent);
1202 }
1203 #endif
1204 {
1205 png_colorp palette;
1206 int num_palette;
1207
1208 if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette) != 0)
1209 png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
1210 }
1211 #ifdef PNG_bKGD_SUPPORTED
1212 {
1213 png_color_16p background;
1214
1215 if (png_get_bKGD(read_ptr, read_info_ptr, &background) != 0)
1216 {
1217 png_set_bKGD(write_ptr, write_info_ptr, background);
1218 }
1219 }
1220 #endif
1221 #ifdef PNG_hIST_SUPPORTED
1222 {
1223 png_uint_16p hist;
1224
1225 if (png_get_hIST(read_ptr, read_info_ptr, &hist) != 0)
1226 png_set_hIST(write_ptr, write_info_ptr, hist);
1227 }
1228 #endif
1229 #ifdef PNG_oFFs_SUPPORTED
1230 {
1231 png_int_32 offset_x, offset_y;
1232 int unit_type;
1233
1234 if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y,
1235 &unit_type) != 0)
1236 {
1237 png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
1238 }
1239 }
1240 #endif
1241 #ifdef PNG_pCAL_SUPPORTED
1242 {
1243 png_charp purpose, units;
1244 png_charpp params;
1245 png_int_32 X0, X1;
1246 int type, nparams;
1247
1248 if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type,
1249 &nparams, &units, ¶ms) != 0)
1250 {
1251 png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type,
1252 nparams, units, params);
1253 }
1254 }
1255 #endif
1256 #ifdef PNG_pHYs_SUPPORTED
1257 {
1258 png_uint_32 res_x, res_y;
1259 int unit_type;
1260
1261 if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y,
1262 &unit_type) != 0)
1263 png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type);
1264 }
1265 #endif
1266 #ifdef PNG_sBIT_SUPPORTED
1267 {
1268 png_color_8p sig_bit;
1269
1270 if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit) != 0)
1271 png_set_sBIT(write_ptr, write_info_ptr, sig_bit);
1272 }
1273 #endif
1274 #ifdef PNG_sCAL_SUPPORTED
1275 #if defined(PNG_FLOATING_POINT_SUPPORTED) && \
1276 defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
1277 {
1278 int unit;
1279 double scal_width, scal_height;
1280
1281 if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width,
1282 &scal_height) != 0)
1283 {
1284 png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height);
1285 }
1286 }
1287 #else
1288 #ifdef PNG_FIXED_POINT_SUPPORTED
1289 {
1290 int unit;
1291 png_charp scal_width, scal_height;
1292
1293 if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width,
1294 &scal_height) != 0)
1295 {
1296 png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width,
1297 scal_height);
1298 }
1299 }
1300 #endif
1301 #endif
1302 #endif
1303
1304 #ifdef PNG_sPLT_SUPPORTED
1305 {
1306 png_sPLT_tp entries;
1307
1308 int num_entries = (int) png_get_sPLT(read_ptr, read_info_ptr, &entries);
1309 if (num_entries)
1310 {
1311 png_set_sPLT(write_ptr, write_info_ptr, entries, num_entries);
1312 }
1313 }
1314 #endif
1315
1316 #ifdef PNG_TEXT_SUPPORTED
1317 {
1318 png_textp text_ptr;
1319 int num_text;
1320
1321 if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
1322 {
1323 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1324
1325 pngtest_check_text_support(read_ptr, text_ptr, num_text);
1326
1327 if (verbose != 0)
1328 {
1329 int i;
1330
1331 printf("\n");
1332 for (i=0; i<num_text; i++)
1333 {
1334 printf(" Text compression[%d]=%d\n",
1335 i, text_ptr[i].compression);
1336 }
1337 }
1338
1339 png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
1340 }
1341 }
1342 #endif
1343 #ifdef PNG_tIME_SUPPORTED
1344 {
1345 png_timep mod_time;
1346
1347 if (png_get_tIME(read_ptr, read_info_ptr, &mod_time) != 0)
1348 {
1349 png_set_tIME(write_ptr, write_info_ptr, mod_time);
1350 #ifdef PNG_TIME_RFC1123_SUPPORTED
1351 if (png_convert_to_rfc1123_buffer(tIME_string, mod_time) != 0)
1352 tIME_string[(sizeof tIME_string) - 1] = '\0';
1353
1354 else
1355 {
1356 strncpy(tIME_string, "*** invalid time ***", (sizeof tIME_string));
1357 tIME_string[(sizeof tIME_string) - 1] = '\0';
1358 }
1359
1360 tIME_chunk_present++;
1361 #endif /* TIME_RFC1123 */
1362 }
1363 }
1364 #endif
1365 #ifdef PNG_tRNS_SUPPORTED
1366 {
1367 png_bytep trans_alpha;
1368 int num_trans;
1369 png_color_16p trans_color;
1370
1371 if (png_get_tRNS(read_ptr, read_info_ptr, &trans_alpha, &num_trans,
1372 &trans_color) != 0)
1373 {
1374 int sample_max = (1 << bit_depth);
1375 /* libpng doesn't reject a tRNS chunk with out-of-range samples */
1376 if (!((color_type == PNG_COLOR_TYPE_GRAY &&
1377 (int)trans_color->gray > sample_max) ||
1378 (color_type == PNG_COLOR_TYPE_RGB &&
1379 ((int)trans_color->red > sample_max ||
1380 (int)trans_color->green > sample_max ||
1381 (int)trans_color->blue > sample_max))))
1382 png_set_tRNS(write_ptr, write_info_ptr, trans_alpha, num_trans,
1383 trans_color);
1384 }
1385 }
1386 #endif
1387 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1388 {
1389 png_unknown_chunkp unknowns;
1390 int num_unknowns = png_get_unknown_chunks(read_ptr, read_info_ptr,
1391 &unknowns);
1392
1393 if (num_unknowns != 0)
1394 {
1395 png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns,
1396 num_unknowns);
1397 #if PNG_LIBPNG_VER < 10600
1398 /* Copy the locations from the read_info_ptr. The automatically
1399 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1400 * because they are reset from the write pointer (removed in 1.6.0).
1401 */
1402 {
1403 int i;
1404 for (i = 0; i < num_unknowns; i++)
1405 png_set_unknown_chunk_location(write_ptr, write_info_ptr, i,
1406 unknowns[i].location);
1407 }
1408 #endif
1409 }
1410 }
1411 #endif
1412
1413 #ifdef PNG_WRITE_SUPPORTED
1414 pngtest_debug("Writing info struct");
1415
1416 /* Write the info in two steps so that if we write the 'unknown' chunks here
1417 * they go to the correct place.
1418 */
1419 png_write_info_before_PLTE(write_ptr, write_info_ptr);
1420
1421 write_chunks(write_ptr, before_PLTE); /* before PLTE */
1422
1423 png_write_info(write_ptr, write_info_ptr);
1424
1425 write_chunks(write_ptr, before_IDAT); /* after PLTE */
1426 #endif
1427
1428 #ifdef SINGLE_ROWBUF_ALLOC
1429 pngtest_debug("Allocating row buffer...");
1430 row_buf = (png_bytep)png_malloc(read_ptr,
1431 png_get_rowbytes(read_ptr, read_info_ptr));
1432
1433 pngtest_debug1("\t0x%08lx", (unsigned long)row_buf);
1434 #endif /* SINGLE_ROWBUF_ALLOC */
1435 pngtest_debug("Writing row data");
1436
1437 #if defined(PNG_READ_INTERLACING_SUPPORTED) &&\
1438 defined(PNG_WRITE_INTERLACING_SUPPORTED)
1439 /* Both must be defined for libpng to be able to handle the interlace,
1440 * otherwise it gets handled below by simply reading and writing the passes
1441 * directly.
1442 */
1443 if (png_set_interlace_handling(read_ptr) != num_passes)
1444 png_error(write_ptr,
1445 "png_set_interlace_handling(read): wrong pass count ");
1446 if (png_set_interlace_handling(write_ptr) != num_passes)
1447 png_error(write_ptr,
1448 "png_set_interlace_handling(write): wrong pass count ");
1449 #else /* png_set_interlace_handling not called on either read or write */
1450 # define calc_pass_height
1451 #endif /* not using libpng interlace handling */
1452
1453 #ifdef PNGTEST_TIMING
1454 t_stop = (float)clock();
1455 t_misc += (t_stop - t_start);
1456 t_start = t_stop;
1457 #endif
1458 for (pass = 0; pass < num_passes; pass++)
1459 {
1460 # ifdef calc_pass_height
1461 png_uint_32 pass_height;
1462
1463 if (num_passes == 7) /* interlaced */
1464 {
1465 if (PNG_PASS_COLS(width, pass) > 0)
1466 pass_height = PNG_PASS_ROWS(height, pass);
1467
1468 else
1469 pass_height = 0;
1470 }
1471
1472 else /* not interlaced */
1473 pass_height = height;
1474 # else
1475 # define pass_height height
1476 # endif
1477
1478 pngtest_debug1("Writing row data for pass %d", pass);
1479 for (y = 0; y < pass_height; y++)
1480 {
1481 #ifndef SINGLE_ROWBUF_ALLOC
1482 pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y);
1483
1484 row_buf = (png_bytep)png_malloc(read_ptr,
1485 png_get_rowbytes(read_ptr, read_info_ptr));
1486
1487 pngtest_debug2("\t0x%08lx (%lu bytes)", (unsigned long)row_buf,
1488 (unsigned long)png_get_rowbytes(read_ptr, read_info_ptr));
1489
1490 #endif /* !SINGLE_ROWBUF_ALLOC */
1491 png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1);
1492
1493 #ifdef PNG_WRITE_SUPPORTED
1494 #ifdef PNGTEST_TIMING
1495 t_stop = (float)clock();
1496 t_decode += (t_stop - t_start);
1497 t_start = t_stop;
1498 #endif
1499 png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
1500 #ifdef PNGTEST_TIMING
1501 t_stop = (float)clock();
1502 t_encode += (t_stop - t_start);
1503 t_start = t_stop;
1504 #endif
1505 #endif /* WRITE */
1506
1507 #ifndef SINGLE_ROWBUF_ALLOC
1508 pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y);
1509 png_free(read_ptr, row_buf);
1510 row_buf = NULL;
1511 #endif /* !SINGLE_ROWBUF_ALLOC */
1512 }
1513 }
1514
1515 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
1516 # ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1517 png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1);
1518 # endif
1519 # ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1520 png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
1521 # endif
1522 #endif
1523
1524 pngtest_debug("Reading and writing end_info data");
1525
1526 png_read_end(read_ptr, end_info_ptr);
1527 #ifdef PNG_TEXT_SUPPORTED
1528 {
1529 png_textp text_ptr;
1530 int num_text;
1531
1532 if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
1533 {
1534 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text);
1535
1536 pngtest_check_text_support(read_ptr, text_ptr, num_text);
1537
1538 if (verbose != 0)
1539 {
1540 int i;
1541
1542 printf("\n");
1543 for (i=0; i<num_text; i++)
1544 {
1545 printf(" Text compression[%d]=%d\n",
1546 i, text_ptr[i].compression);
1547 }
1548 }
1549
1550 png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
1551 }
1552 }
1553 #endif
1554 #ifdef PNG_tIME_SUPPORTED
1555 {
1556 png_timep mod_time;
1557
1558 if (png_get_tIME(read_ptr, end_info_ptr, &mod_time) != 0)
1559 {
1560 png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
1561 #ifdef PNG_TIME_RFC1123_SUPPORTED
1562 if (png_convert_to_rfc1123_buffer(tIME_string, mod_time) != 0)
1563 tIME_string[(sizeof tIME_string) - 1] = '\0';
1564
1565 else
1566 {
1567 strncpy(tIME_string, "*** invalid time ***", sizeof tIME_string);
1568 tIME_string[(sizeof tIME_string)-1] = '\0';
1569 }
1570
1571 tIME_chunk_present++;
1572 #endif /* TIME_RFC1123 */
1573 }
1574 }
1575 #endif
1576 #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1577 {
1578 png_unknown_chunkp unknowns;
1579 int num_unknowns = png_get_unknown_chunks(read_ptr, end_info_ptr,
1580 &unknowns);
1581
1582 if (num_unknowns != 0)
1583 {
1584 png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns,
1585 num_unknowns);
1586 #if PNG_LIBPNG_VER < 10600
1587 /* Copy the locations from the read_info_ptr. The automatically
1588 * generated locations in write_end_info_ptr are wrong prior to 1.6.0
1589 * because they are reset from the write pointer (removed in 1.6.0).
1590 */
1591 {
1592 int i;
1593 for (i = 0; i < num_unknowns; i++)
1594 png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i,
1595 unknowns[i].location);
1596 }
1597 #endif
1598 }
1599 }
1600 #endif
1601
1602 #ifdef PNG_WRITE_SUPPORTED
1603 #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
1604 /* Normally one would use Z_DEFAULT_STRATEGY for text compression.
1605 * This is here just to make pngtest replicate the results from libpng
1606 * versions prior to 1.5.4, and to test this new API.
1607 */
1608 png_set_text_compression_strategy(write_ptr, Z_FILTERED);
1609 #endif
1610
1611 /* When the unknown vpAg/sTER chunks are written by pngtest the only way to
1612 * do it is to write them *before* calling png_write_end. When unknown
1613 * chunks are written by libpng, however, they are written just before IEND.
1614 * There seems to be no way round this, however vpAg/sTER are not expected
1615 * after IDAT.
1616 */
1617 write_chunks(write_ptr, after_IDAT);
1618
1619 png_write_end(write_ptr, write_end_info_ptr);
1620 #endif
1621
1622 #ifdef PNG_EASY_ACCESS_SUPPORTED
1623 if (verbose != 0)
1624 {
1625 png_uint_32 iwidth, iheight;
1626 iwidth = png_get_image_width(write_ptr, write_info_ptr);
1627 iheight = png_get_image_height(write_ptr, write_info_ptr);
1628 fprintf(STDERR, "\n Image width = %lu, height = %lu\n",
1629 (unsigned long)iwidth, (unsigned long)iheight);
1630 }
1631 #endif
1632
1633 pngtest_debug("Destroying data structs");
1634 #ifdef SINGLE_ROWBUF_ALLOC
1635 pngtest_debug("destroying row_buf for read_ptr");
1636 png_free(read_ptr, row_buf);
1637 row_buf = NULL;
1638 #endif /* SINGLE_ROWBUF_ALLOC */
1639 pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr");
1640 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
1641 #ifdef PNG_WRITE_SUPPORTED
1642 pngtest_debug("destroying write_end_info_ptr");
1643 png_destroy_info_struct(write_ptr, &write_end_info_ptr);
1644 pngtest_debug("destroying write_ptr, write_info_ptr");
1645 png_destroy_write_struct(&write_ptr, &write_info_ptr);
1646 #endif
1647 pngtest_debug("Destruction complete.");
1648
1649 FCLOSE(fpin);
1650 FCLOSE(fpout);
1651
1652 /* Summarize any warnings or errors and in 'strict' mode fail the test.
1653 * Unsupported chunks can result in warnings, in that case ignore the strict
1654 * setting, otherwise fail the test on warnings as well as errors.
1655 */
1656 if (error_count > 0)
1657 {
1658 /* We don't really expect to get here because of the setjmp handling
1659 * above, but this is safe.
1660 */
1661 fprintf(STDERR, "\n %s: %d libpng errors found (%d warnings)",
1662 inname, error_count, warning_count);
1663
1664 if (strict != 0)
1665 return (1);
1666 }
1667
1668 # ifdef PNG_WRITE_SUPPORTED
1669 /* If there is no write support nothing was written! */
1670 else if (unsupported_chunks > 0)
1671 {
1672 fprintf(STDERR, "\n %s: unsupported chunks (%d)%s",
1673 inname, unsupported_chunks, strict ? ": IGNORED --strict!" : "");
1674 }
1675 # endif
1676
1677 else if (warning_count > 0)
1678 {
1679 fprintf(STDERR, "\n %s: %d libpng warnings found",
1680 inname, warning_count);
1681
1682 if (strict != 0)
1683 return (1);
1684 }
1685
1686 pngtest_debug("Opening files for comparison");
1687 if ((fpin = fopen(inname, "rb")) == NULL)
1688 {
1689 fprintf(STDERR, "Could not find file %s\n", inname);
1690 return (1);
1691 }
1692
1693 if ((fpout = fopen(outname, "rb")) == NULL)
1694 {
1695 fprintf(STDERR, "Could not find file %s\n", outname);
1696 FCLOSE(fpin);
1697 return (1);
1698 }
1699
1700 #if defined (PNG_WRITE_SUPPORTED) /* else nothing was written */ &&\
1701 defined (PNG_WRITE_FILTER_SUPPORTED)
1702 if (interlace_preserved != 0) /* else the files will be changed */
1703 {
1704 for (;;)
1705 {
1706 static int wrote_question = 0;
1707 png_size_t num_in, num_out;
1708 char inbuf[256], outbuf[256];
1709
1710 num_in = fread(inbuf, 1, sizeof inbuf, fpin);
1711 num_out = fread(outbuf, 1, sizeof outbuf, fpout);
1712
1713 if (num_in != num_out)
1714 {
1715 fprintf(STDERR, "\nFiles %s and %s are of a different size\n",
1716 inname, outname);
1717
1718 if (wrote_question == 0 && unsupported_chunks == 0)
1719 {
1720 fprintf(STDERR,
1721 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1722 inname, PNG_ZBUF_SIZE);
1723 fprintf(STDERR,
1724 "\n filtering heuristic (libpng default), compression");
1725 fprintf(STDERR,
1726 " level (zlib default),\n and zlib version (%s)?\n\n",
1727 ZLIB_VERSION);
1728 wrote_question = 1;
1729 }
1730
1731 FCLOSE(fpin);
1732 FCLOSE(fpout);
1733
1734 if (strict != 0 && unsupported_chunks == 0)
1735 return (1);
1736
1737 else
1738 return (0);
1739 }
1740
1741 if (num_in == 0)
1742 break;
1743
1744 if (memcmp(inbuf, outbuf, num_in))
1745 {
1746 fprintf(STDERR, "\nFiles %s and %s are different\n", inname,
1747 outname);
1748
1749 if (wrote_question == 0 && unsupported_chunks == 0)
1750 {
1751 fprintf(STDERR,
1752 " Was %s written with the same maximum IDAT chunk size (%d bytes),",
1753 inname, PNG_ZBUF_SIZE);
1754 fprintf(STDERR,
1755 "\n filtering heuristic (libpng default), compression");
1756 fprintf(STDERR,
1757 " level (zlib default),\n and zlib version (%s)?\n\n",
1758 ZLIB_VERSION);
1759 wrote_question = 1;
1760 }
1761
1762 FCLOSE(fpin);
1763 FCLOSE(fpout);
1764
1765 /* NOTE: the unsupported_chunks escape is permitted here because
1766 * unsupported text chunk compression will result in the compression
1767 * mode being changed (to NONE) yet, in the test case, the result
1768 * can be exactly the same size!
1769 */
1770 if (strict != 0 && unsupported_chunks == 0)
1771 return (1);
1772
1773 else
1774 return (0);
1775 }
1776 }
1777 }
1778 #endif /* WRITE && WRITE_FILTER */
1779
1780 FCLOSE(fpin);
1781 FCLOSE(fpout);
1782
1783 return (0);
1784 }
1785
1786 /* Input and output filenames */
1787 #ifdef RISCOS
1788 static PNG_CONST char *inname = "pngtest/png";
1789 static PNG_CONST char *outname = "pngout/png";
1790 #else
1791 static PNG_CONST char *inname = "pngtest.png";
1792 static PNG_CONST char *outname = "pngout.png";
1793 #endif
1794
1795 int
1796 main(int argc, char *argv[])
1797 {
1798 int multiple = 0;
1799 int ierror = 0;
1800
1801 png_structp dummy_ptr;
1802
1803 fprintf(STDERR, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
1804 fprintf(STDERR, " with zlib version %s\n", ZLIB_VERSION);
1805 fprintf(STDERR, "%s", png_get_copyright(NULL));
1806 /* Show the version of libpng used in building the library */
1807 fprintf(STDERR, " library (%lu):%s",
1808 (unsigned long)png_access_version_number(),
1809 png_get_header_version(NULL));
1810
1811 /* Show the version of libpng used in building the application */
1812 fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
1813 PNG_HEADER_VERSION_STRING);
1814
1815 /* Do some consistency checking on the memory allocation settings, I'm
1816 * not sure this matters, but it is nice to know, the first of these
1817 * tests should be impossible because of the way the macros are set
1818 * in pngconf.h
1819 */
1820 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1821 fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n");
1822 #endif
1823 /* I think the following can happen. */
1824 #if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1825 fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n");
1826 #endif
1827
1828 if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING))
1829 {
1830 fprintf(STDERR,
1831 "Warning: versions are different between png.h and png.c\n");
1832 fprintf(STDERR, " png.h version: %s\n", PNG_LIBPNG_VER_STRING);
1833 fprintf(STDERR, " png.c version: %s\n\n", png_libpng_ver);
1834 ++ierror;
1835 }
1836
1837 if (argc > 1)
1838 {
1839 if (strcmp(argv[1], "-m") == 0)
1840 {
1841 multiple = 1;
1842 status_dots_requested = 0;
1843 }
1844
1845 else if (strcmp(argv[1], "-mv") == 0 ||
1846 strcmp(argv[1], "-vm") == 0 )
1847 {
1848 multiple = 1;
1849 verbose = 1;
1850 status_dots_requested = 1;
1851 }
1852
1853 else if (strcmp(argv[1], "-v") == 0)
1854 {
1855 verbose = 1;
1856 status_dots_requested = 1;
1857 inname = argv[2];
1858 }
1859
1860 else if (strcmp(argv[1], "--strict") == 0)
1861 {
1862 status_dots_requested = 0;
1863 verbose = 1;
1864 inname = argv[2];
1865 strict++;
1866 relaxed = 0;
1867 }
1868
1869 else if (strcmp(argv[1], "--relaxed") == 0)
1870 {
1871 status_dots_requested = 0;
1872 verbose = 1;
1873 inname = argv[2];
1874 strict = 0;
1875 relaxed++;
1876 }
1877
1878 else
1879 {
1880 inname = argv[1];
1881 status_dots_requested = 0;
1882 }
1883 }
1884
1885 if (multiple == 0 && argc == 3 + verbose)
1886 outname = argv[2 + verbose];
1887
1888 if ((multiple == 0 && argc > 3 + verbose) ||
1889 (multiple != 0 && argc < 2))
1890 {
1891 fprintf(STDERR,
1892 "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
1893 argv[0], argv[0]);
1894 fprintf(STDERR,
1895 " reads/writes one PNG file (without -m) or multiple files (-m)\n");
1896 fprintf(STDERR,
1897 " with -m %s is used as a temporary file\n", outname);
1898 exit(1);
1899 }
1900
1901 if (multiple != 0)
1902 {
1903 int i;
1904 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1905 int allocation_now = current_allocation;
1906 #endif
1907 for (i=2; i<argc; ++i)
1908 {
1909 int kerror;
1910 fprintf(STDERR, "\n Testing %s:", argv[i]);
1911 #if PNG_DEBUG > 0
1912 fprintf(STDERR, "\n");
1913 #endif
1914 kerror = test_one_file(argv[i], outname);
1915 if (kerror == 0)
1916 {
1917 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1918 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1919 (unsigned long)zero_samples);
1920 #else
1921 fprintf(STDERR, " PASS\n");
1922 #endif
1923 #ifdef PNG_TIME_RFC1123_SUPPORTED
1924 if (tIME_chunk_present != 0)
1925 fprintf(STDERR, " tIME = %s\n", tIME_string);
1926
1927 tIME_chunk_present = 0;
1928 #endif /* TIME_RFC1123 */
1929 }
1930
1931 else
1932 {
1933 fprintf(STDERR, " FAIL\n");
1934 ierror += kerror;
1935 }
1936 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1937 if (allocation_now != current_allocation)
1938 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1939 current_allocation - allocation_now);
1940
1941 if (current_allocation != 0)
1942 {
1943 memory_infop pinfo = pinformation;
1944
1945 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1946 current_allocation);
1947
1948 while (pinfo != NULL)
1949 {
1950 fprintf(STDERR, " %lu bytes at %p\n",
1951 (unsigned long)pinfo->size,
1952 pinfo->pointer);
1953 pinfo = pinfo->next;
1954 }
1955 }
1956 #endif
1957 }
1958 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1959 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1960 current_allocation);
1961 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1962 maximum_allocation);
1963 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
1964 total_allocation);
1965 fprintf(STDERR, " Number of allocations: %10d\n",
1966 num_allocations);
1967 #endif
1968 }
1969
1970 else
1971 {
1972 int i;
1973 for (i = 0; i<3; ++i)
1974 {
1975 int kerror;
1976 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1977 int allocation_now = current_allocation;
1978 #endif
1979 if (i == 1)
1980 status_dots_requested = 1;
1981
1982 else if (verbose == 0)
1983 status_dots_requested = 0;
1984
1985 if (i == 0 || verbose == 1 || ierror != 0)
1986 {
1987 fprintf(STDERR, "\n Testing %s:", inname);
1988 #if PNG_DEBUG > 0
1989 fprintf(STDERR, "\n");
1990 #endif
1991 }
1992
1993 kerror = test_one_file(inname, outname);
1994
1995 if (kerror == 0)
1996 {
1997 if (verbose == 1 || i == 2)
1998 {
1999 #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
2000 fprintf(STDERR, "\n PASS (%lu zero samples)\n",
2001 (unsigned long)zero_samples);
2002 #else
2003 fprintf(STDERR, " PASS\n");
2004 #endif
2005 #ifdef PNG_TIME_RFC1123_SUPPORTED
2006 if (tIME_chunk_present != 0)
2007 fprintf(STDERR, " tIME = %s\n", tIME_string);
2008 #endif /* TIME_RFC1123 */
2009 }
2010 }
2011
2012 else
2013 {
2014 if (verbose == 0 && i != 2)
2015 {
2016 fprintf(STDERR, "\n Testing %s:", inname);
2017 #if PNG_DEBUG > 0
2018 fprintf(STDERR, "\n");
2019 #endif
2020 }
2021
2022 fprintf(STDERR, " FAIL\n");
2023 ierror += kerror;
2024 }
2025 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2026 if (allocation_now != current_allocation)
2027 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
2028 current_allocation - allocation_now);
2029
2030 if (current_allocation != 0)
2031 {
2032 memory_infop pinfo = pinformation;
2033
2034 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
2035 current_allocation);
2036
2037 while (pinfo != NULL)
2038 {
2039 fprintf(STDERR, " %lu bytes at %p\n",
2040 (unsigned long)pinfo->size, pinfo->pointer);
2041 pinfo = pinfo->next;
2042 }
2043 }
2044 #endif
2045 }
2046 #if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
2047 fprintf(STDERR, " Current memory allocation: %10d bytes\n",
2048 current_allocation);
2049 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
2050 maximum_allocation);
2051 fprintf(STDERR, " Total memory allocation: %10d bytes\n",
2052 total_allocation);
2053 fprintf(STDERR, " Number of allocations: %10d\n",
2054 num_allocations);
2055 #endif
2056 }
2057
2058 #ifdef PNGTEST_TIMING
2059 t_stop = (float)clock();
2060 t_misc += (t_stop - t_start);
2061 t_start = t_stop;
2062 fprintf(STDERR, " CPU time used = %.3f seconds",
2063 (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC);
2064 fprintf(STDERR, " (decoding %.3f,\n",
2065 t_decode/(float)CLOCKS_PER_SEC);
2066 fprintf(STDERR, " encoding %.3f ,",
2067 t_encode/(float)CLOCKS_PER_SEC);
2068 fprintf(STDERR, " other %.3f seconds)\n\n",
2069 t_misc/(float)CLOCKS_PER_SEC);
2070 #endif
2071
2072 if (ierror == 0)
2073 fprintf(STDERR, " libpng passes test\n");
2074
2075 else
2076 fprintf(STDERR, " libpng FAILS test\n");
2077
2078 dummy_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
2079 fprintf(STDERR, " Default limits:\n");
2080 fprintf(STDERR, " width_max = %lu\n",
2081 (unsigned long) png_get_user_width_max(dummy_ptr));
2082 fprintf(STDERR, " height_max = %lu\n",
2083 (unsigned long) png_get_user_height_max(dummy_ptr));
2084 if (png_get_chunk_cache_max(dummy_ptr) == 0)
2085 fprintf(STDERR, " cache_max = unlimited\n");
2086 else
2087 fprintf(STDERR, " cache_max = %lu\n",
2088 (unsigned long) png_get_chunk_cache_max(dummy_ptr));
2089 if (png_get_chunk_malloc_max(dummy_ptr) == 0)
2090 fprintf(STDERR, " malloc_max = unlimited\n");
2091 else
2092 fprintf(STDERR, " malloc_max = %lu\n",
2093 (unsigned long) png_get_chunk_malloc_max(dummy_ptr));
2094 png_destroy_read_struct(&dummy_ptr, NULL, NULL);
2095
2096 return (int)(ierror != 0);
2097 }
2098 #else
2099 int
2100 main(void)
2101 {
2102 fprintf(STDERR,
2103 " test ignored because libpng was not built with read support\n");
2104 /* And skip this test */
2105 return SKIP;
2106 }
2107 #endif
2108
2109 /* Generate a compiler error if there is an old png.h in the search path. */
2110 typedef png_libpng_version_1_6_23 Your_png_h_is_not_version_1_6_23;