1 2/* pngtest.c - a simple test program to test libpng 3 * 4 * Last changed in libpng 1.5.25 [December 3, 2015] 5 * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson 6 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) 7 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) 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/* 1.6.1 added support for the configure test harness, which uses 77 to indicate 47 * a skipped test, in earlier versions we need to succeed on a skipped test, so: 48 */ 49#if PNG_LIBPNG_VER >= 10601 && defined(HAVE_CONFIG_H) 50# define SKIP 77 51#else 52# define SKIP 0 53#endif 54 55/* Known chunks that exist in pngtest.png must be supported or pngtest will fail 56 * simply as a result of re-ordering them. This may be fixed in 1.7 57 * 58 * pngtest allocates a single row buffer for each row and overwrites it, 59 * therefore if the write side doesn't support the writing of interlaced images 60 * nothing can be done for an interlaced image (and the code below will fail 61 * horribly trying to write extra data after writing garbage). 62 */ 63#if defined PNG_READ_SUPPORTED && /* else nothing can be done */\ 64 defined PNG_READ_bKGD_SUPPORTED &&\ 65 defined PNG_READ_cHRM_SUPPORTED &&\ 66 defined PNG_READ_gAMA_SUPPORTED &&\ 67 defined PNG_READ_oFFs_SUPPORTED &&\ 68 defined PNG_READ_pCAL_SUPPORTED &&\ 69 defined PNG_READ_pHYs_SUPPORTED &&\ 70 defined PNG_READ_sBIT_SUPPORTED &&\ 71 defined PNG_READ_sCAL_SUPPORTED &&\ 72 defined PNG_READ_sRGB_SUPPORTED &&\ 73 defined PNG_READ_sPLT_SUPPORTED &&\ 74 defined PNG_READ_tEXt_SUPPORTED &&\ 75 defined PNG_READ_tIME_SUPPORTED &&\ 76 defined PNG_READ_zTXt_SUPPORTED &&\ 77 (defined PNG_WRITE_INTERLACING_SUPPORTED || PNG_LIBPNG_VER >= 10700) 78 79#ifdef PNG_ZLIB_HEADER 80# include PNG_ZLIB_HEADER /* defined by pnglibconf.h from 1.7 */ 81#else 82# include "zlib.h" 83#endif 84 85/* Copied from pngpriv.h but only used in error messages below. */ 86#ifndef PNG_ZBUF_SIZE 87# define PNG_ZBUF_SIZE 8192 88#endif 89#define FCLOSE(file) fclose(file) 90 91#ifndef PNG_STDIO_SUPPORTED 92typedef FILE * png_FILE_p; 93#endif 94 95/* Makes pngtest verbose so we can find problems. */ 96#ifndef PNG_DEBUG 97# define PNG_DEBUG 0 98#endif 99 100#if PNG_DEBUG > 1 101# define pngtest_debug(m) ((void)fprintf(stderr, m "\n")) 102# define pngtest_debug1(m,p1) ((void)fprintf(stderr, m "\n", p1)) 103# define pngtest_debug2(m,p1,p2) ((void)fprintf(stderr, m "\n", p1, p2)) 104#else 105# define pngtest_debug(m) ((void)0) 106# define pngtest_debug1(m,p1) ((void)0) 107# define pngtest_debug2(m,p1,p2) ((void)0) 108#endif 109 110#if !PNG_DEBUG 111# define SINGLE_ROWBUF_ALLOC /* Makes buffer overruns easier to nail */ 112#endif 113 114#ifndef PNG_UNUSED 115# define PNG_UNUSED(param) (void)param; 116#endif 117 118/* Turn on CPU timing 119#define PNGTEST_TIMING 120*/ 121 122#ifndef PNG_FLOATING_POINT_SUPPORTED 123#undef PNGTEST_TIMING 124#endif 125 126#ifdef PNGTEST_TIMING 127static float t_start, t_stop, t_decode, t_encode, t_misc; 128#include <time.h> 129#endif 130 131#ifdef PNG_TIME_RFC1123_SUPPORTED 132#define PNG_tIME_STRING_LENGTH 29 133static int tIME_chunk_present = 0; 134static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present"; 135 136#if PNG_LIBPNG_VER < 10619 137#define png_convert_to_rfc1123_buffer(ts, t) tIME_to_str(read_ptr, ts, t) 138 139static int 140tIME_to_str(png_structp png_ptr, png_charp ts, png_const_timep t) 141{ 142 png_const_charp str = png_convert_to_rfc1123(png_ptr, t); 143 144 if (str == NULL) 145 return 0; 146 147 strcpy(ts, str); 148 return 1; 149} 150#endif /* older libpng */ 151#endif 152 153static int verbose = 0; 154static int strict = 0; 155static int relaxed = 0; 156static int unsupported_chunks = 0; /* chunk unsupported by libpng in input */ 157static int error_count = 0; /* count calls to png_error */ 158static int warning_count = 0; /* count calls to png_warning */ 159 160/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */ 161#ifndef png_jmpbuf 162# define png_jmpbuf(png_ptr) png_ptr->jmpbuf 163#endif 164 165/* Defines for unknown chunk handling if required. */ 166#ifndef PNG_HANDLE_CHUNK_ALWAYS 167# define PNG_HANDLE_CHUNK_ALWAYS 3 168#endif 169#ifndef PNG_HANDLE_CHUNK_IF_SAFE 170# define PNG_HANDLE_CHUNK_IF_SAFE 2 171#endif 172 173/* Utility to save typing/errors, the argument must be a name */ 174#define MEMZERO(var) ((void)memset(&var, 0, sizeof var)) 175 176/* Example of using row callbacks to make a simple progress meter */ 177static int status_pass = 1; 178static int status_dots_requested = 0; 179static int status_dots = 1; 180 181static void PNGCBAPI 182read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) 183{ 184 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX) 185 return; 186 187 if (status_pass != pass) 188 { 189 fprintf(stdout, "\n Pass %d: ", pass); 190 status_pass = pass; 191 status_dots = 31; 192 } 193 194 status_dots--; 195 196 if (status_dots == 0) 197 { 198 fprintf(stdout, "\n "); 199 status_dots=30; 200 } 201 202 fprintf(stdout, "r"); 203} 204 205#ifdef PNG_WRITE_SUPPORTED 206static void PNGCBAPI 207write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass) 208{ 209 if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7) 210 return; 211 212 fprintf(stdout, "w"); 213} 214#endif 215 216 217#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED 218/* Example of using a user transform callback (doesn't do anything at present). 219 */ 220static void PNGCBAPI 221read_user_callback(png_structp png_ptr, png_row_infop row_info, png_bytep data) 222{ 223 PNG_UNUSED(png_ptr) 224 PNG_UNUSED(row_info) 225 PNG_UNUSED(data) 226} 227#endif 228 229#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED 230/* Example of using user transform callback (we don't transform anything, 231 * but merely count the zero samples) 232 */ 233 234static png_uint_32 zero_samples; 235 236static void PNGCBAPI 237count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data) 238{ 239 png_bytep dp = data; 240 if (png_ptr == NULL) 241 return; 242 243 /* Contents of row_info: 244 * png_uint_32 width width of row 245 * png_uint_32 rowbytes number of bytes in row 246 * png_byte color_type color type of pixels 247 * png_byte bit_depth bit depth of samples 248 * png_byte channels number of channels (1-4) 249 * png_byte pixel_depth bits per pixel (depth*channels) 250 */ 251 252 /* Counts the number of zero samples (or zero pixels if color_type is 3 */ 253 254 if (row_info->color_type == 0 || row_info->color_type == 3) 255 { 256 int pos = 0; 257 png_uint_32 n, nstop; 258 259 for (n = 0, nstop=row_info->width; n<nstop; n++) 260 { 261 if (row_info->bit_depth == 1) 262 { 263 if (((*dp << pos++ ) & 0x80) == 0) 264 zero_samples++; 265 266 if (pos == 8) 267 { 268 pos = 0; 269 dp++; 270 } 271 } 272 273 if (row_info->bit_depth == 2) 274 { 275 if (((*dp << (pos+=2)) & 0xc0) == 0) 276 zero_samples++; 277 278 if (pos == 8) 279 { 280 pos = 0; 281 dp++; 282 } 283 } 284 285 if (row_info->bit_depth == 4) 286 { 287 if (((*dp << (pos+=4)) & 0xf0) == 0) 288 zero_samples++; 289 290 if (pos == 8) 291 { 292 pos = 0; 293 dp++; 294 } 295 } 296 297 if (row_info->bit_depth == 8) 298 if (*dp++ == 0) 299 zero_samples++; 300 301 if (row_info->bit_depth == 16) 302 { 303 if ((*dp | *(dp+1)) == 0) 304 zero_samples++; 305 dp+=2; 306 } 307 } 308 } 309 else /* Other color types */ 310 { 311 png_uint_32 n, nstop; 312 int channel; 313 int color_channels = row_info->channels; 314 if (row_info->color_type > 3) 315 color_channels--; 316 317 for (n = 0, nstop=row_info->width; n<nstop; n++) 318 { 319 for (channel = 0; channel < color_channels; channel++) 320 { 321 if (row_info->bit_depth == 8) 322 if (*dp++ == 0) 323 zero_samples++; 324 325 if (row_info->bit_depth == 16) 326 { 327 if ((*dp | *(dp+1)) == 0) 328 zero_samples++; 329 330 dp+=2; 331 } 332 } 333 if (row_info->color_type > 3) 334 { 335 dp++; 336 if (row_info->bit_depth == 16) 337 dp++; 338 } 339 } 340 } 341} 342#endif /* WRITE_USER_TRANSFORM */ 343 344#ifndef PNG_STDIO_SUPPORTED 345/* START of code to validate stdio-free compilation */ 346/* These copies of the default read/write functions come from pngrio.c and 347 * pngwio.c. They allow "don't include stdio" testing of the library. 348 * This is the function that does the actual reading of data. If you are 349 * not reading from a standard C stream, you should create a replacement 350 * read_data function and use it at run time with png_set_read_fn(), rather 351 * than changing the library. 352 */ 353 354#ifdef PNG_IO_STATE_SUPPORTED 355void 356pngtest_check_io_state(png_structp png_ptr, png_size_t data_length, 357 png_uint_32 io_op); 358void 359pngtest_check_io_state(png_structp png_ptr, png_size_t data_length, 360 png_uint_32 io_op) 361{ 362 png_uint_32 io_state = png_get_io_state(png_ptr); 363 int err = 0; 364 365 /* Check if the current operation (reading / writing) is as expected. */ 366 if ((io_state & PNG_IO_MASK_OP) != io_op) 367 png_error(png_ptr, "Incorrect operation in I/O state"); 368 369 /* Check if the buffer size specific to the current location 370 * (file signature / header / data / crc) is as expected. 371 */ 372 switch (io_state & PNG_IO_MASK_LOC) 373 { 374 case PNG_IO_SIGNATURE: 375 if (data_length > 8) 376 err = 1; 377 break; 378 case PNG_IO_CHUNK_HDR: 379 if (data_length != 8) 380 err = 1; 381 break; 382 case PNG_IO_CHUNK_DATA: 383 break; /* no restrictions here */ 384 case PNG_IO_CHUNK_CRC: 385 if (data_length != 4) 386 err = 1; 387 break; 388 default: 389 err = 1; /* uninitialized */ 390 } 391 if (err != 0) 392 png_error(png_ptr, "Bad I/O state or buffer size"); 393} 394#endif 395 396static void PNGCBAPI 397pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length) 398{ 399 png_size_t check = 0; 400 png_voidp io_ptr; 401 402 /* fread() returns 0 on error, so it is OK to store this in a png_size_t 403 * instead of an int, which is what fread() actually returns. 404 */ 405 io_ptr = png_get_io_ptr(png_ptr); 406 if (io_ptr != NULL) 407 { 408 check = fread(data, 1, length, (png_FILE_p)io_ptr); 409 } 410 411 if (check != length) 412 { 413 png_error(png_ptr, "Read Error"); 414 } 415 416#ifdef PNG_IO_STATE_SUPPORTED 417 pngtest_check_io_state(png_ptr, length, PNG_IO_READING); 418#endif 419} 420 421#ifdef PNG_WRITE_FLUSH_SUPPORTED 422static void PNGCBAPI 423pngtest_flush(png_structp png_ptr) 424{ 425 /* Do nothing; fflush() is said to be just a waste of energy. */ 426 PNG_UNUSED(png_ptr) /* Stifle compiler warning */ 427} 428#endif 429 430/* This is the function that does the actual writing of data. If you are 431 * not writing to a standard C stream, you should create a replacement 432 * write_data function and use it at run time with png_set_write_fn(), rather 433 * than changing the library. 434 */ 435static void PNGCBAPI 436pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length) 437{ 438 png_size_t check; 439 440 check = fwrite(data, 1, length, (png_FILE_p)png_get_io_ptr(png_ptr)); 441 442 if (check != length) 443 { 444 png_error(png_ptr, "Write Error"); 445 } 446 447#ifdef PNG_IO_STATE_SUPPORTED 448 pngtest_check_io_state(png_ptr, length, PNG_IO_WRITING); 449#endif 450} 451#endif /* !STDIO */ 452 453/* This function is called when there is a warning, but the library thinks 454 * it can continue anyway. Replacement functions don't have to do anything 455 * here if you don't want to. In the default configuration, png_ptr is 456 * not used, but it is passed in case it may be useful. 457 */ 458typedef struct 459{ 460 PNG_CONST char *file_name; 461} pngtest_error_parameters; 462 463static void PNGCBAPI 464pngtest_warning(png_structp png_ptr, png_const_charp message) 465{ 466 PNG_CONST char *name = "UNKNOWN (ERROR!)"; 467 pngtest_error_parameters *test = 468 (pngtest_error_parameters*)png_get_error_ptr(png_ptr); 469 470 ++warning_count; 471 472 if (test != NULL && test->file_name != NULL) 473 name = test->file_name; 474 475 fprintf(STDERR, "%s: libpng warning: %s\n", name, message); 476} 477 478/* This is the default error handling function. Note that replacements for 479 * this function MUST NOT RETURN, or the program will likely crash. This 480 * function is used by default, or if the program supplies NULL for the 481 * error function pointer in png_set_error_fn(). 482 */ 483static void PNGCBAPI 484pngtest_error(png_structp png_ptr, png_const_charp message) 485{ 486 ++error_count; 487 488 pngtest_warning(png_ptr, message); 489 /* We can return because png_error calls the default handler, which is 490 * actually OK in this case. 491 */ 492} 493 494/* END of code to validate stdio-free compilation */ 495 496/* START of code to validate memory allocation and deallocation */ 497#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG 498 499/* Allocate memory. For reasonable files, size should never exceed 500 * 64K. However, zlib may allocate more than 64K if you don't tell 501 * it not to. See zconf.h and png.h for more information. zlib does 502 * need to allocate exactly 64K, so whatever you call here must 503 * have the ability to do that. 504 * 505 * This piece of code can be compiled to validate max 64K allocations 506 * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K. 507 */ 508typedef struct memory_information 509{ 510 png_alloc_size_t size; 511 png_voidp pointer; 512 struct memory_information *next; 513} memory_information; 514typedef memory_information *memory_infop; 515 516static memory_infop pinformation = NULL; 517static int current_allocation = 0; 518static int maximum_allocation = 0; 519static int total_allocation = 0; 520static int num_allocations = 0; 521 522png_voidp PNGCBAPI png_debug_malloc PNGARG((png_structp png_ptr, 523 png_alloc_size_t size)); 524void PNGCBAPI png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr)); 525 526png_voidp 527PNGCBAPI png_debug_malloc(png_structp png_ptr, png_alloc_size_t size) 528{ 529 530 /* png_malloc has already tested for NULL; png_create_struct calls 531 * png_debug_malloc directly, with png_ptr == NULL which is OK 532 */ 533 534 if (size == 0) 535 return (NULL); 536 537 /* This calls the library allocator twice, once to get the requested 538 buffer and once to get a new free list entry. */ 539 { 540 /* Disable malloc_fn and free_fn */ 541 memory_infop pinfo; 542 png_set_mem_fn(png_ptr, NULL, NULL, NULL); 543 pinfo = (memory_infop)png_malloc(png_ptr, 544 (sizeof *pinfo)); 545 pinfo->size = size; 546 current_allocation += size; 547 total_allocation += size; 548 num_allocations ++; 549 550 if (current_allocation > maximum_allocation) 551 maximum_allocation = current_allocation; 552 553 pinfo->pointer = png_malloc(png_ptr, size); 554 /* Restore malloc_fn and free_fn */ 555 556 png_set_mem_fn(png_ptr, 557 NULL, png_debug_malloc, png_debug_free); 558 559 if (size != 0 && pinfo->pointer == NULL) 560 { 561 current_allocation -= size; 562 total_allocation -= size; 563 png_error(png_ptr, 564 "out of memory in pngtest->png_debug_malloc"); 565 } 566 567 pinfo->next = pinformation; 568 pinformation = pinfo; 569 /* Make sure the caller isn't assuming zeroed memory. */ 570 memset(pinfo->pointer, 0xdd, pinfo->size); 571 572 if (verbose != 0) 573 printf("png_malloc %lu bytes at %p\n", (unsigned long)size, 574 pinfo->pointer); 575 576 return (png_voidp)(pinfo->pointer); 577 } 578} 579 580/* Free a pointer. It is removed from the list at the same time. */ 581void PNGCBAPI 582png_debug_free(png_structp png_ptr, png_voidp ptr) 583{ 584 if (png_ptr == NULL) 585 fprintf(STDERR, "NULL pointer to png_debug_free.\n"); 586 587 if (ptr == 0) 588 { 589#if 0 /* This happens all the time. */ 590 fprintf(STDERR, "WARNING: freeing NULL pointer\n"); 591#endif 592 return; 593 } 594 595 /* Unlink the element from the list. */ 596 if (pinformation != NULL) 597 { 598 memory_infop *ppinfo = &pinformation; 599 600 for (;;) 601 { 602 memory_infop pinfo = *ppinfo; 603 604 if (pinfo->pointer == ptr) 605 { 606 *ppinfo = pinfo->next; 607 current_allocation -= pinfo->size; 608 if (current_allocation < 0) 609 fprintf(STDERR, "Duplicate free of memory\n"); 610 /* We must free the list element too, but first kill 611 the memory that is to be freed. */ 612 memset(ptr, 0x55, pinfo->size); 613 free(pinfo); 614 pinfo = NULL; 615 break; 616 } 617 618 if (pinfo->next == NULL) 619 { 620 fprintf(STDERR, "Pointer %p not found\n", ptr); 621 break; 622 } 623 624 ppinfo = &pinfo->next; 625 } 626 } 627 628 /* Finally free the data. */ 629 if (verbose != 0) 630 printf("Freeing %p\n", ptr); 631 632 if (ptr != NULL) 633 free(ptr); 634 ptr = NULL; 635} 636#endif /* USER_MEM && DEBUG */ 637/* END of code to test memory allocation/deallocation */ 638 639 640#ifdef PNG_READ_USER_CHUNKS_SUPPORTED 641/* Demonstration of user chunk support of the sTER and vpAg chunks */ 642 643/* (sTER is a public chunk not yet known by libpng. vpAg is a private 644chunk used in ImageMagick to store "virtual page" size). */ 645 646static struct user_chunk_data 647{ 648 png_const_infop info_ptr; 649 png_uint_32 vpAg_width, vpAg_height; 650 png_byte vpAg_units; 651 png_byte sTER_mode; 652 int location[2]; 653} 654user_chunk_data; 655 656/* Used for location and order; zero means nothing. */ 657#define have_sTER 0x01 658#define have_vpAg 0x02 659#define before_PLTE 0x10 660#define before_IDAT 0x20 661#define after_IDAT 0x40 662 663static void 664init_callback_info(png_const_infop info_ptr) 665{ 666 MEMZERO(user_chunk_data); 667 user_chunk_data.info_ptr = info_ptr; 668} 669 670static int 671set_location(png_structp png_ptr, struct user_chunk_data *data, int what) 672{ 673 int location; 674 675 if ((data->location[0] & what) != 0 || (data->location[1] & what) != 0) 676 return 0; /* already have one of these */ 677 678 /* Find where we are (the code below zeroes info_ptr to indicate that the 679 * chunks before the first IDAT have been read.) 680 */ 681 if (data->info_ptr == NULL) /* after IDAT */ 682 location = what | after_IDAT; 683 684 else if (png_get_valid(png_ptr, data->info_ptr, PNG_INFO_PLTE) != 0) 685 location = what | before_IDAT; 686 687 else 688 location = what | before_PLTE; 689 690 if (data->location[0] == 0) 691 data->location[0] = location; 692 693 else 694 data->location[1] = location; 695 696 return 1; /* handled */ 697} 698 699static int PNGCBAPI 700read_user_chunk_callback(png_struct *png_ptr, png_unknown_chunkp chunk) 701{ 702 struct user_chunk_data *my_user_chunk_data = 703 (struct user_chunk_data*)png_get_user_chunk_ptr(png_ptr); 704 705 if (my_user_chunk_data == NULL) 706 png_error(png_ptr, "lost user chunk pointer"); 707 708 /* Return one of the following: 709 * return (-n); chunk had an error 710 * return (0); did not recognize 711 * return (n); success 712 * 713 * The unknown chunk structure contains the chunk data: 714 * png_byte name[5]; 715 * png_byte *data; 716 * png_size_t size; 717 * 718 * Note that libpng has already taken care of the CRC handling. 719 */ 720 721 if (chunk->name[0] == 115 && chunk->name[1] == 84 && /* s T */ 722 chunk->name[2] == 69 && chunk->name[3] == 82) /* E R */ 723 { 724 /* Found sTER chunk */ 725 if (chunk->size != 1) 726 return (-1); /* Error return */ 727 728 if (chunk->data[0] != 0 && chunk->data[0] != 1) 729 return (-1); /* Invalid mode */ 730 731 if (set_location(png_ptr, my_user_chunk_data, have_sTER) != 0) 732 { 733 my_user_chunk_data->sTER_mode=chunk->data[0]; 734 return (1); 735 } 736 737 else 738 return (0); /* duplicate sTER - give it to libpng */ 739 } 740 741 if (chunk->name[0] != 118 || chunk->name[1] != 112 || /* v p */ 742 chunk->name[2] != 65 || chunk->name[3] != 103) /* A g */ 743 return (0); /* Did not recognize */ 744 745 /* Found ImageMagick vpAg chunk */ 746 747 if (chunk->size != 9) 748 return (-1); /* Error return */ 749 750 if (set_location(png_ptr, my_user_chunk_data, have_vpAg) == 0) 751 return (0); /* duplicate vpAg */ 752 753 my_user_chunk_data->vpAg_width = png_get_uint_31(png_ptr, chunk->data); 754 my_user_chunk_data->vpAg_height = png_get_uint_31(png_ptr, chunk->data + 4); 755 my_user_chunk_data->vpAg_units = chunk->data[8]; 756 757 return (1); 758} 759 760#ifdef PNG_WRITE_SUPPORTED 761static void 762write_sTER_chunk(png_structp write_ptr) 763{ 764 png_byte sTER[5] = {115, 84, 69, 82, '\0'}; 765 766 if (verbose != 0) 767 fprintf(STDERR, "\n stereo mode = %d\n", user_chunk_data.sTER_mode); 768 769 png_write_chunk(write_ptr, sTER, &user_chunk_data.sTER_mode, 1); 770} 771 772static void 773write_vpAg_chunk(png_structp write_ptr) 774{ 775 png_byte vpAg[5] = {118, 112, 65, 103, '\0'}; 776 777 png_byte vpag_chunk_data[9]; 778 779 if (verbose != 0) 780 fprintf(STDERR, " vpAg = %lu x %lu, units = %d\n", 781 (unsigned long)user_chunk_data.vpAg_width, 782 (unsigned long)user_chunk_data.vpAg_height, 783 user_chunk_data.vpAg_units); 784 785 png_save_uint_32(vpag_chunk_data, user_chunk_data.vpAg_width); 786 png_save_uint_32(vpag_chunk_data + 4, user_chunk_data.vpAg_height); 787 vpag_chunk_data[8] = user_chunk_data.vpAg_units; 788 png_write_chunk(write_ptr, vpAg, vpag_chunk_data, 9); 789} 790 791static void 792write_chunks(png_structp write_ptr, int location) 793{ 794 int i; 795 796 /* Notice that this preserves the original chunk order, however chunks 797 * intercepted by the callback will be written *after* chunks passed to 798 * libpng. This will actually reverse a pair of sTER chunks or a pair of 799 * vpAg chunks, resulting in an error later. This is not worth worrying 800 * about - the chunks should not be duplicated! 801 */ 802 for (i=0; i<2; ++i) 803 { 804 if (user_chunk_data.location[i] == (location | have_sTER)) 805 write_sTER_chunk(write_ptr); 806 807 else if (user_chunk_data.location[i] == (location | have_vpAg)) 808 write_vpAg_chunk(write_ptr); 809 } 810} 811#endif /* WRITE */ 812#else /* !READ_USER_CHUNKS */ 813# define write_chunks(pp,loc) ((void)0) 814#endif 815/* END of code to demonstrate user chunk support */ 816 817/* START of code to check that libpng has the required text support; this only 818 * checks for the write support because if read support is missing the chunk 819 * will simply not be reported back to pngtest. 820 */ 821#ifdef PNG_TEXT_SUPPORTED 822static void 823pngtest_check_text_support(png_structp png_ptr, png_textp text_ptr, 824 int num_text) 825{ 826 while (num_text > 0) 827 { 828 switch (text_ptr[--num_text].compression) 829 { 830 case PNG_TEXT_COMPRESSION_NONE: 831 break; 832 833 case PNG_TEXT_COMPRESSION_zTXt: 834# ifndef PNG_WRITE_zTXt_SUPPORTED 835 ++unsupported_chunks; 836 /* In libpng 1.7 this now does an app-error, so stop it: */ 837 text_ptr[num_text].compression = PNG_TEXT_COMPRESSION_NONE; 838# endif 839 break; 840 841 case PNG_ITXT_COMPRESSION_NONE: 842 case PNG_ITXT_COMPRESSION_zTXt: 843# ifndef PNG_WRITE_iTXt_SUPPORTED 844 ++unsupported_chunks; 845 text_ptr[num_text].compression = PNG_TEXT_COMPRESSION_NONE; 846# endif 847 break; 848 849 default: 850 /* This is an error */ 851 png_error(png_ptr, "invalid text chunk compression field"); 852 break; 853 } 854 } 855} 856#endif 857/* END of code to check that libpng has the required text support */ 858 859/* Test one file */ 860static int 861test_one_file(PNG_CONST char *inname, PNG_CONST char *outname) 862{ 863 static png_FILE_p fpin; 864 static png_FILE_p fpout; /* "static" prevents setjmp corruption */ 865 pngtest_error_parameters error_parameters; 866 png_structp read_ptr; 867 png_infop read_info_ptr, end_info_ptr; 868#ifdef PNG_WRITE_SUPPORTED 869 png_structp write_ptr; 870 png_infop write_info_ptr; 871 png_infop write_end_info_ptr; 872#ifdef PNG_WRITE_FILTER_SUPPORTED 873 int interlace_preserved = 1; 874#endif /* WRITE_FILTER */ 875#else /* !WRITE */ 876 png_structp write_ptr = NULL; 877 png_infop write_info_ptr = NULL; 878 png_infop write_end_info_ptr = NULL; 879#endif /* !WRITE */ 880 png_bytep row_buf; 881 png_uint_32 y; 882 png_uint_32 width, height; 883 volatile int num_passes; 884 int pass; 885 int bit_depth, color_type; 886 887 row_buf = NULL; 888 error_parameters.file_name = inname; 889 890 if ((fpin = fopen(inname, "rb")) == NULL) 891 { 892 fprintf(STDERR, "Could not find input file %s\n", inname); 893 return (1); 894 } 895 896 if ((fpout = fopen(outname, "wb")) == NULL) 897 { 898 fprintf(STDERR, "Could not open output file %s\n", outname); 899 FCLOSE(fpin); 900 return (1); 901 } 902 903 pngtest_debug("Allocating read and write structures"); 904#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG 905 read_ptr = 906 png_create_read_struct_2(PNG_LIBPNG_VER_STRING, NULL, 907 NULL, NULL, NULL, png_debug_malloc, png_debug_free); 908#else 909 read_ptr = 910 png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 911#endif 912 png_set_error_fn(read_ptr, &error_parameters, pngtest_error, 913 pngtest_warning); 914 915#ifdef PNG_WRITE_SUPPORTED 916#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG 917 write_ptr = 918 png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL, 919 NULL, NULL, NULL, png_debug_malloc, png_debug_free); 920#else 921 write_ptr = 922 png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 923#endif 924 png_set_error_fn(write_ptr, &error_parameters, pngtest_error, 925 pngtest_warning); 926#endif 927 pngtest_debug("Allocating read_info, write_info and end_info structures"); 928 read_info_ptr = png_create_info_struct(read_ptr); 929 end_info_ptr = png_create_info_struct(read_ptr); 930#ifdef PNG_WRITE_SUPPORTED 931 write_info_ptr = png_create_info_struct(write_ptr); 932 write_end_info_ptr = png_create_info_struct(write_ptr); 933#endif 934 935#ifdef PNG_READ_USER_CHUNKS_SUPPORTED 936 init_callback_info(read_info_ptr); 937 png_set_read_user_chunk_fn(read_ptr, &user_chunk_data, 938 read_user_chunk_callback); 939#endif 940 941#ifdef PNG_SETJMP_SUPPORTED 942 pngtest_debug("Setting jmpbuf for read struct"); 943 if (setjmp(png_jmpbuf(read_ptr))) 944 { 945 fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname); 946 png_free(read_ptr, row_buf); 947 row_buf = NULL; 948 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); 949#ifdef PNG_WRITE_SUPPORTED 950 png_destroy_info_struct(write_ptr, &write_end_info_ptr); 951 png_destroy_write_struct(&write_ptr, &write_info_ptr); 952#endif 953 FCLOSE(fpin); 954 FCLOSE(fpout); 955 return (1); 956 } 957 958#ifdef PNG_WRITE_SUPPORTED 959 pngtest_debug("Setting jmpbuf for write struct"); 960 961 if (setjmp(png_jmpbuf(write_ptr))) 962 { 963 fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname); 964 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); 965 png_destroy_info_struct(write_ptr, &write_end_info_ptr); 966#ifdef PNG_WRITE_SUPPORTED 967 png_destroy_write_struct(&write_ptr, &write_info_ptr); 968#endif 969 FCLOSE(fpin); 970 FCLOSE(fpout); 971 return (1); 972 } 973#endif 974#endif 975 976 if (strict != 0) 977 { 978 /* Treat png_benign_error() as errors on read */ 979 png_set_benign_errors(read_ptr, 0); 980 981#ifdef PNG_WRITE_SUPPORTED 982 /* Treat them as errors on write */ 983 png_set_benign_errors(write_ptr, 0); 984#endif 985 986 /* if strict is not set, then app warnings and errors are treated as 987 * warnings in release builds, but not in unstable builds; this can be 988 * changed with '--relaxed'. 989 */ 990 } 991 992 else if (relaxed != 0) 993 { 994 /* Allow application (pngtest) errors and warnings to pass */ 995 png_set_benign_errors(read_ptr, 1); 996 997#ifdef PNG_WRITE_SUPPORTED 998 png_set_benign_errors(write_ptr, 1); 999#endif 1000 } 1001 1002 pngtest_debug("Initializing input and output streams"); 1003#ifdef PNG_STDIO_SUPPORTED 1004 png_init_io(read_ptr, fpin); 1005# ifdef PNG_WRITE_SUPPORTED 1006 png_init_io(write_ptr, fpout); 1007# endif 1008#else 1009 png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data); 1010# ifdef PNG_WRITE_SUPPORTED 1011 png_set_write_fn(write_ptr, (png_voidp)fpout, pngtest_write_data, 1012# ifdef PNG_WRITE_FLUSH_SUPPORTED 1013 pngtest_flush); 1014# else 1015 NULL); 1016# endif 1017# endif 1018#endif 1019 1020 if (status_dots_requested == 1) 1021 { 1022#ifdef PNG_WRITE_SUPPORTED 1023 png_set_write_status_fn(write_ptr, write_row_callback); 1024#endif 1025 png_set_read_status_fn(read_ptr, read_row_callback); 1026 } 1027 1028 else 1029 { 1030#ifdef PNG_WRITE_SUPPORTED 1031 png_set_write_status_fn(write_ptr, NULL); 1032#endif 1033 png_set_read_status_fn(read_ptr, NULL); 1034 } 1035 1036#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED 1037 png_set_read_user_transform_fn(read_ptr, read_user_callback); 1038#endif 1039#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED 1040 zero_samples = 0; 1041 png_set_write_user_transform_fn(write_ptr, count_zero_samples); 1042#endif 1043 1044#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED 1045 /* Preserve all the unknown chunks, if possible. If this is disabled then, 1046 * even if the png_{get,set}_unknown_chunks stuff is enabled, we can't use 1047 * libpng to *save* the unknown chunks on read (because we can't switch the 1048 * save option on!) 1049 * 1050 * Notice that if SET_UNKNOWN_CHUNKS is *not* supported read will discard all 1051 * unknown chunks and write will write them all. 1052 */ 1053#ifdef PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED 1054 png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS, 1055 NULL, 0); 1056#endif 1057#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED 1058 png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_ALWAYS, 1059 NULL, 0); 1060#endif 1061#endif 1062 1063 pngtest_debug("Reading info struct"); 1064 png_read_info(read_ptr, read_info_ptr); 1065 1066#ifdef PNG_READ_USER_CHUNKS_SUPPORTED 1067 /* This is a bit of a hack; there is no obvious way in the callback function 1068 * to determine that the chunks before the first IDAT have been read, so 1069 * remove the info_ptr (which is only used to determine position relative to 1070 * PLTE) here to indicate that we are after the IDAT. 1071 */ 1072 user_chunk_data.info_ptr = NULL; 1073#endif 1074 1075 pngtest_debug("Transferring info struct"); 1076 { 1077 int interlace_type, compression_type, filter_type; 1078 1079 if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth, 1080 &color_type, &interlace_type, &compression_type, &filter_type) != 0) 1081 { 1082 png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth, 1083 color_type, interlace_type, compression_type, filter_type); 1084 /* num_passes may not be available below if interlace support is not 1085 * provided by libpng for both read and write. 1086 */ 1087 switch (interlace_type) 1088 { 1089 case PNG_INTERLACE_NONE: 1090 num_passes = 1; 1091 break; 1092 1093 case PNG_INTERLACE_ADAM7: 1094 num_passes = 7; 1095 break; 1096 1097 default: 1098 png_error(read_ptr, "invalid interlace type"); 1099 /*NOT REACHED*/ 1100 } 1101 } 1102 1103 else 1104 png_error(read_ptr, "png_get_IHDR failed"); 1105 } 1106#ifdef PNG_FIXED_POINT_SUPPORTED 1107#ifdef PNG_cHRM_SUPPORTED 1108 { 1109 png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x, 1110 blue_y; 1111 1112 if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y, 1113 &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y) != 0) 1114 { 1115 png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x, 1116 red_y, green_x, green_y, blue_x, blue_y); 1117 } 1118 } 1119#endif 1120#ifdef PNG_gAMA_SUPPORTED 1121 { 1122 png_fixed_point gamma; 1123 1124 if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma) != 0) 1125 png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma); 1126 } 1127#endif 1128#else /* Use floating point versions */ 1129#ifdef PNG_FLOATING_POINT_SUPPORTED 1130#ifdef PNG_cHRM_SUPPORTED 1131 { 1132 double white_x, white_y, red_x, red_y, green_x, green_y, blue_x, 1133 blue_y; 1134 1135 if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x, 1136 &red_y, &green_x, &green_y, &blue_x, &blue_y) != 0) 1137 { 1138 png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x, 1139 red_y, green_x, green_y, blue_x, blue_y); 1140 } 1141 } 1142#endif 1143#ifdef PNG_gAMA_SUPPORTED 1144 { 1145 double gamma; 1146 1147 if (png_get_gAMA(read_ptr, read_info_ptr, &gamma) != 0) 1148 png_set_gAMA(write_ptr, write_info_ptr, gamma); 1149 } 1150#endif 1151#endif /* Floating point */ 1152#endif /* Fixed point */ 1153#ifdef PNG_iCCP_SUPPORTED 1154 { 1155 png_charp name; 1156 png_bytep profile; 1157 png_uint_32 proflen; 1158 int compression_type; 1159 1160 if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type, 1161 &profile, &proflen) != 0) 1162 { 1163 png_set_iCCP(write_ptr, write_info_ptr, name, compression_type, 1164 profile, proflen); 1165 } 1166 } 1167#endif 1168#ifdef PNG_sRGB_SUPPORTED 1169 { 1170 int intent; 1171 1172 if (png_get_sRGB(read_ptr, read_info_ptr, &intent) != 0) 1173 png_set_sRGB(write_ptr, write_info_ptr, intent); 1174 } 1175#endif 1176 { 1177 png_colorp palette; 1178 int num_palette; 1179 1180 if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette) != 0) 1181 png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette); 1182 } 1183#ifdef PNG_bKGD_SUPPORTED 1184 { 1185 png_color_16p background; 1186 1187 if (png_get_bKGD(read_ptr, read_info_ptr, &background) != 0) 1188 { 1189 png_set_bKGD(write_ptr, write_info_ptr, background); 1190 } 1191 } 1192#endif 1193#ifdef PNG_hIST_SUPPORTED 1194 { 1195 png_uint_16p hist; 1196 1197 if (png_get_hIST(read_ptr, read_info_ptr, &hist) != 0) 1198 png_set_hIST(write_ptr, write_info_ptr, hist); 1199 } 1200#endif 1201#ifdef PNG_oFFs_SUPPORTED 1202 { 1203 png_int_32 offset_x, offset_y; 1204 int unit_type; 1205 1206 if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y, 1207 &unit_type) != 0) 1208 { 1209 png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type); 1210 } 1211 } 1212#endif 1213#ifdef PNG_pCAL_SUPPORTED 1214 { 1215 png_charp purpose, units; 1216 png_charpp params; 1217 png_int_32 X0, X1; 1218 int type, nparams; 1219 1220 if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type, 1221 &nparams, &units, ¶ms) != 0) 1222 { 1223 png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type, 1224 nparams, units, params); 1225 } 1226 } 1227#endif 1228#ifdef PNG_pHYs_SUPPORTED 1229 { 1230 png_uint_32 res_x, res_y; 1231 int unit_type; 1232 1233 if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y, 1234 &unit_type) != 0) 1235 png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type); 1236 } 1237#endif 1238#ifdef PNG_sBIT_SUPPORTED 1239 { 1240 png_color_8p sig_bit; 1241 1242 if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit) != 0) 1243 png_set_sBIT(write_ptr, write_info_ptr, sig_bit); 1244 } 1245#endif 1246#ifdef PNG_sCAL_SUPPORTED 1247#if defined(PNG_FLOATING_POINT_SUPPORTED) && \ 1248 defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) 1249 { 1250 int unit; 1251 double scal_width, scal_height; 1252 1253 if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width, 1254 &scal_height) != 0) 1255 { 1256 png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height); 1257 } 1258 } 1259#else 1260#ifdef PNG_FIXED_POINT_SUPPORTED 1261 { 1262 int unit; 1263 png_charp scal_width, scal_height; 1264 1265 if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width, 1266 &scal_height) != 0) 1267 { 1268 png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width, 1269 scal_height); 1270 } 1271 } 1272#endif 1273#endif 1274#endif 1275 1276#ifdef PNG_sPLT_SUPPORTED 1277 { 1278 png_sPLT_tp entries; 1279 1280 int num_entries = (int) png_get_sPLT(read_ptr, read_info_ptr, &entries); 1281 if (num_entries) 1282 { 1283 png_set_sPLT(write_ptr, write_info_ptr, entries, num_entries); 1284 } 1285 } 1286#endif 1287 1288#ifdef PNG_TEXT_SUPPORTED 1289 { 1290 png_textp text_ptr; 1291 int num_text; 1292 1293 if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0) 1294 { 1295 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text); 1296 1297 pngtest_check_text_support(read_ptr, text_ptr, num_text); 1298 1299 if (verbose != 0) 1300 { 1301 int i; 1302 1303 printf("\n"); 1304 for (i=0; i<num_text; i++) 1305 { 1306 printf(" Text compression[%d]=%d\n", 1307 i, text_ptr[i].compression); 1308 } 1309 } 1310 1311 png_set_text(write_ptr, write_info_ptr, text_ptr, num_text); 1312 } 1313 } 1314#endif 1315#ifdef PNG_tIME_SUPPORTED 1316 { 1317 png_timep mod_time; 1318 1319 if (png_get_tIME(read_ptr, read_info_ptr, &mod_time) != 0) 1320 { 1321 png_set_tIME(write_ptr, write_info_ptr, mod_time); 1322#ifdef PNG_TIME_RFC1123_SUPPORTED 1323 if (png_convert_to_rfc1123_buffer(tIME_string, mod_time) != 0) 1324 tIME_string[(sizeof tIME_string) - 1] = '\0'; 1325 1326 else 1327 { 1328 strncpy(tIME_string, "*** invalid time ***", (sizeof tIME_string)); 1329 tIME_string[(sizeof tIME_string) - 1] = '\0'; 1330 } 1331 1332 tIME_chunk_present++; 1333#endif /* TIME_RFC1123 */ 1334 } 1335 } 1336#endif 1337#ifdef PNG_tRNS_SUPPORTED 1338 { 1339 png_bytep trans_alpha; 1340 int num_trans; 1341 png_color_16p trans_color; 1342 1343 if (png_get_tRNS(read_ptr, read_info_ptr, &trans_alpha, &num_trans, 1344 &trans_color) != 0) 1345 { 1346 int sample_max = (1 << bit_depth); 1347 /* libpng doesn't reject a tRNS chunk with out-of-range samples */ 1348 if (!((color_type == PNG_COLOR_TYPE_GRAY && 1349 (int)trans_color->gray > sample_max) || 1350 (color_type == PNG_COLOR_TYPE_RGB && 1351 ((int)trans_color->red > sample_max || 1352 (int)trans_color->green > sample_max || 1353 (int)trans_color->blue > sample_max)))) 1354 png_set_tRNS(write_ptr, write_info_ptr, trans_alpha, num_trans, 1355 trans_color); 1356 } 1357 } 1358#endif 1359#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED 1360 { 1361 png_unknown_chunkp unknowns; 1362 int num_unknowns = png_get_unknown_chunks(read_ptr, read_info_ptr, 1363 &unknowns); 1364 1365 if (num_unknowns != 0) 1366 { 1367 png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns, 1368 num_unknowns); 1369#if PNG_LIBPNG_VER < 10600 1370 /* Copy the locations from the read_info_ptr. The automatically 1371 * generated locations in write_end_info_ptr are wrong prior to 1.6.0 1372 * because they are reset from the write pointer (removed in 1.6.0). 1373 */ 1374 { 1375 int i; 1376 for (i = 0; i < num_unknowns; i++) 1377 png_set_unknown_chunk_location(write_ptr, write_info_ptr, i, 1378 unknowns[i].location); 1379 } 1380#endif 1381 } 1382 } 1383#endif 1384 1385#ifdef PNG_WRITE_SUPPORTED 1386 pngtest_debug("Writing info struct"); 1387 1388 /* Write the info in two steps so that if we write the 'unknown' chunks here 1389 * they go to the correct place. 1390 */ 1391 png_write_info_before_PLTE(write_ptr, write_info_ptr); 1392 1393 write_chunks(write_ptr, before_PLTE); /* before PLTE */ 1394 1395 png_write_info(write_ptr, write_info_ptr); 1396 1397 write_chunks(write_ptr, before_IDAT); /* after PLTE */ 1398#endif 1399 1400#ifdef SINGLE_ROWBUF_ALLOC 1401 pngtest_debug("Allocating row buffer..."); 1402 row_buf = (png_bytep)png_malloc(read_ptr, 1403 png_get_rowbytes(read_ptr, read_info_ptr)); 1404 1405 pngtest_debug1("\t0x%08lx", (unsigned long)row_buf); 1406#endif /* SINGLE_ROWBUF_ALLOC */ 1407 pngtest_debug("Writing row data"); 1408 1409#if defined(PNG_READ_INTERLACING_SUPPORTED) &&\ 1410 defined(PNG_WRITE_INTERLACING_SUPPORTED) 1411 /* Both must be defined for libpng to be able to handle the interlace, 1412 * otherwise it gets handled below by simply reading and writing the passes 1413 * directly. 1414 */ 1415 if (png_set_interlace_handling(read_ptr) != num_passes) 1416 png_error(write_ptr, 1417 "png_set_interlace_handling(read): wrong pass count "); 1418 if (png_set_interlace_handling(write_ptr) != num_passes) 1419 png_error(write_ptr, 1420 "png_set_interlace_handling(write): wrong pass count "); 1421#else /* png_set_interlace_handling not called on either read or write */ 1422# define calc_pass_height 1423#endif /* not using libpng interlace handling */ 1424 1425#ifdef PNGTEST_TIMING 1426 t_stop = (float)clock(); 1427 t_misc += (t_stop - t_start); 1428 t_start = t_stop; 1429#endif 1430 for (pass = 0; pass < num_passes; pass++) 1431 { 1432# ifdef calc_pass_height 1433 png_uint_32 pass_height; 1434 1435 if (num_passes == 7) /* interlaced */ 1436 { 1437 if (PNG_PASS_COLS(width, pass) > 0) 1438 pass_height = PNG_PASS_ROWS(height, pass); 1439 1440 else 1441 pass_height = 0; 1442 } 1443 1444 else /* not interlaced */ 1445 pass_height = height; 1446# else 1447# define pass_height height 1448# endif 1449 1450 pngtest_debug1("Writing row data for pass %d", pass); 1451 for (y = 0; y < pass_height; y++) 1452 { 1453#ifndef SINGLE_ROWBUF_ALLOC 1454 pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y); 1455 1456 row_buf = (png_bytep)png_malloc(read_ptr, 1457 png_get_rowbytes(read_ptr, read_info_ptr)); 1458 1459 pngtest_debug2("\t0x%08lx (%lu bytes)", (unsigned long)row_buf, 1460 (unsigned long)png_get_rowbytes(read_ptr, read_info_ptr)); 1461 1462#endif /* !SINGLE_ROWBUF_ALLOC */ 1463 png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1); 1464 1465#ifdef PNG_WRITE_SUPPORTED 1466#ifdef PNGTEST_TIMING 1467 t_stop = (float)clock(); 1468 t_decode += (t_stop - t_start); 1469 t_start = t_stop; 1470#endif 1471 png_write_rows(write_ptr, (png_bytepp)&row_buf, 1); 1472#ifdef PNGTEST_TIMING 1473 t_stop = (float)clock(); 1474 t_encode += (t_stop - t_start); 1475 t_start = t_stop; 1476#endif 1477#endif /* WRITE */ 1478 1479#ifndef SINGLE_ROWBUF_ALLOC 1480 pngtest_debug2("Freeing row buffer (pass %d, y = %u)", pass, y); 1481 png_free(read_ptr, row_buf); 1482 row_buf = NULL; 1483#endif /* !SINGLE_ROWBUF_ALLOC */ 1484 } 1485 } 1486 1487#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED 1488# ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED 1489 png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1); 1490# endif 1491# ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED 1492 png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1); 1493# endif 1494#endif 1495 1496 pngtest_debug("Reading and writing end_info data"); 1497 1498 png_read_end(read_ptr, end_info_ptr); 1499#ifdef PNG_TEXT_SUPPORTED 1500 { 1501 png_textp text_ptr; 1502 int num_text; 1503 1504 if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0) 1505 { 1506 pngtest_debug1("Handling %d iTXt/tEXt/zTXt chunks", num_text); 1507 1508 pngtest_check_text_support(read_ptr, text_ptr, num_text); 1509 1510 if (verbose != 0) 1511 { 1512 int i; 1513 1514 printf("\n"); 1515 for (i=0; i<num_text; i++) 1516 { 1517 printf(" Text compression[%d]=%d\n", 1518 i, text_ptr[i].compression); 1519 } 1520 } 1521 1522 png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text); 1523 } 1524 } 1525#endif 1526#ifdef PNG_tIME_SUPPORTED 1527 { 1528 png_timep mod_time; 1529 1530 if (png_get_tIME(read_ptr, end_info_ptr, &mod_time) != 0) 1531 { 1532 png_set_tIME(write_ptr, write_end_info_ptr, mod_time); 1533#ifdef PNG_TIME_RFC1123_SUPPORTED 1534 if (png_convert_to_rfc1123_buffer(tIME_string, mod_time) != 0) 1535 tIME_string[(sizeof tIME_string) - 1] = '\0'; 1536 1537 else 1538 { 1539 strncpy(tIME_string, "*** invalid time ***", sizeof tIME_string); 1540 tIME_string[(sizeof tIME_string)-1] = '\0'; 1541 } 1542 1543 tIME_chunk_present++; 1544#endif /* TIME_RFC1123 */ 1545 } 1546 } 1547#endif 1548#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED 1549 { 1550 png_unknown_chunkp unknowns; 1551 int num_unknowns = png_get_unknown_chunks(read_ptr, end_info_ptr, 1552 &unknowns); 1553 1554 if (num_unknowns != 0) 1555 { 1556 png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns, 1557 num_unknowns); 1558#if PNG_LIBPNG_VER < 10600 1559 /* Copy the locations from the read_info_ptr. The automatically 1560 * generated locations in write_end_info_ptr are wrong prior to 1.6.0 1561 * because they are reset from the write pointer (removed in 1.6.0). 1562 */ 1563 { 1564 int i; 1565 for (i = 0; i < num_unknowns; i++) 1566 png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i, 1567 unknowns[i].location); 1568 } 1569#endif 1570 } 1571 } 1572#endif 1573 1574#ifdef PNG_WRITE_SUPPORTED 1575#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED 1576 /* Normally one would use Z_DEFAULT_STRATEGY for text compression. 1577 * This is here just to make pngtest replicate the results from libpng 1578 * versions prior to 1.5.4, and to test this new API. 1579 */ 1580 png_set_text_compression_strategy(write_ptr, Z_FILTERED); 1581#endif 1582 1583 /* When the unknown vpAg/sTER chunks are written by pngtest the only way to 1584 * do it is to write them *before* calling png_write_end. When unknown 1585 * chunks are written by libpng, however, they are written just before IEND. 1586 * There seems to be no way round this, however vpAg/sTER are not expected 1587 * after IDAT. 1588 */ 1589 write_chunks(write_ptr, after_IDAT); 1590 1591 png_write_end(write_ptr, write_end_info_ptr); 1592#endif 1593 1594#ifdef PNG_EASY_ACCESS_SUPPORTED 1595 if (verbose != 0) 1596 { 1597 png_uint_32 iwidth, iheight; 1598 iwidth = png_get_image_width(write_ptr, write_info_ptr); 1599 iheight = png_get_image_height(write_ptr, write_info_ptr); 1600 fprintf(STDERR, "\n Image width = %lu, height = %lu\n", 1601 (unsigned long)iwidth, (unsigned long)iheight); 1602 } 1603#endif 1604 1605 pngtest_debug("Destroying data structs"); 1606#ifdef SINGLE_ROWBUF_ALLOC 1607 pngtest_debug("destroying row_buf for read_ptr"); 1608 png_free(read_ptr, row_buf); 1609 row_buf = NULL; 1610#endif /* SINGLE_ROWBUF_ALLOC */ 1611 pngtest_debug("destroying read_ptr, read_info_ptr, end_info_ptr"); 1612 png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr); 1613#ifdef PNG_WRITE_SUPPORTED 1614 pngtest_debug("destroying write_end_info_ptr"); 1615 png_destroy_info_struct(write_ptr, &write_end_info_ptr); 1616 pngtest_debug("destroying write_ptr, write_info_ptr"); 1617 png_destroy_write_struct(&write_ptr, &write_info_ptr); 1618#endif 1619 pngtest_debug("Destruction complete."); 1620 1621 FCLOSE(fpin); 1622 FCLOSE(fpout); 1623 1624 /* Summarize any warnings or errors and in 'strict' mode fail the test. 1625 * Unsupported chunks can result in warnings, in that case ignore the strict 1626 * setting, otherwise fail the test on warnings as well as errors. 1627 */ 1628 if (error_count > 0) 1629 { 1630 /* We don't really expect to get here because of the setjmp handling 1631 * above, but this is safe. 1632 */ 1633 fprintf(STDERR, "\n %s: %d libpng errors found (%d warnings)", 1634 inname, error_count, warning_count); 1635 1636 if (strict != 0) 1637 return (1); 1638 } 1639 1640# ifdef PNG_WRITE_SUPPORTED 1641 /* If there is no write support nothing was written! */ 1642 else if (unsupported_chunks > 0) 1643 { 1644 fprintf(STDERR, "\n %s: unsupported chunks (%d)%s", 1645 inname, unsupported_chunks, strict ? ": IGNORED --strict!" : ""); 1646 } 1647# endif 1648 1649 else if (warning_count > 0) 1650 { 1651 fprintf(STDERR, "\n %s: %d libpng warnings found", 1652 inname, warning_count); 1653 1654 if (strict != 0) 1655 return (1); 1656 } 1657 1658 pngtest_debug("Opening files for comparison"); 1659 if ((fpin = fopen(inname, "rb")) == NULL) 1660 { 1661 fprintf(STDERR, "Could not find file %s\n", inname); 1662 return (1); 1663 } 1664 1665 if ((fpout = fopen(outname, "rb")) == NULL) 1666 { 1667 fprintf(STDERR, "Could not find file %s\n", outname); 1668 FCLOSE(fpin); 1669 return (1); 1670 } 1671 1672#if defined (PNG_WRITE_SUPPORTED) /* else nothing was written */ &&\ 1673 defined (PNG_WRITE_FILTER_SUPPORTED) 1674 if (interlace_preserved != 0) /* else the files will be changed */ 1675 { 1676 for (;;) 1677 { 1678 static int wrote_question = 0; 1679 png_size_t num_in, num_out; 1680 char inbuf[256], outbuf[256]; 1681 1682 num_in = fread(inbuf, 1, sizeof inbuf, fpin); 1683 num_out = fread(outbuf, 1, sizeof outbuf, fpout); 1684 1685 if (num_in != num_out) 1686 { 1687 fprintf(STDERR, "\nFiles %s and %s are of a different size\n", 1688 inname, outname); 1689 1690 if (wrote_question == 0 && unsupported_chunks == 0) 1691 { 1692 fprintf(STDERR, 1693 " Was %s written with the same maximum IDAT chunk size (%d bytes),", 1694 inname, PNG_ZBUF_SIZE); 1695 fprintf(STDERR, 1696 "\n filtering heuristic (libpng default), compression"); 1697 fprintf(STDERR, 1698 " level (zlib default),\n and zlib version (%s)?\n\n", 1699 ZLIB_VERSION); 1700 wrote_question = 1; 1701 } 1702 1703 FCLOSE(fpin); 1704 FCLOSE(fpout); 1705 1706 if (strict != 0 && unsupported_chunks == 0) 1707 return (1); 1708 1709 else 1710 return (0); 1711 } 1712 1713 if (num_in == 0) 1714 break; 1715 1716 if (memcmp(inbuf, outbuf, num_in)) 1717 { 1718 fprintf(STDERR, "\nFiles %s and %s are different\n", inname, 1719 outname); 1720 1721 if (wrote_question == 0 && unsupported_chunks == 0) 1722 { 1723 fprintf(STDERR, 1724 " Was %s written with the same maximum IDAT chunk size (%d bytes),", 1725 inname, PNG_ZBUF_SIZE); 1726 fprintf(STDERR, 1727 "\n filtering heuristic (libpng default), compression"); 1728 fprintf(STDERR, 1729 " level (zlib default),\n and zlib version (%s)?\n\n", 1730 ZLIB_VERSION); 1731 wrote_question = 1; 1732 } 1733 1734 FCLOSE(fpin); 1735 FCLOSE(fpout); 1736 1737 /* NOTE: the unsupported_chunks escape is permitted here because 1738 * unsupported text chunk compression will result in the compression 1739 * mode being changed (to NONE) yet, in the test case, the result 1740 * can be exactly the same size! 1741 */ 1742 if (strict != 0 && unsupported_chunks == 0) 1743 return (1); 1744 1745 else 1746 return (0); 1747 } 1748 } 1749 } 1750#endif /* WRITE && WRITE_FILTER */ 1751 1752 FCLOSE(fpin); 1753 FCLOSE(fpout); 1754 1755 return (0); 1756} 1757 1758/* Input and output filenames */ 1759#ifdef RISCOS 1760static PNG_CONST char *inname = "pngtest/png"; 1761static PNG_CONST char *outname = "pngout/png"; 1762#else 1763static PNG_CONST char *inname = "pngtest.png"; 1764static PNG_CONST char *outname = "pngout.png"; 1765#endif 1766 1767int 1768main(int argc, char *argv[]) 1769{ 1770 int multiple = 0; 1771 int ierror = 0; 1772 1773 png_structp dummy_ptr; 1774 1775 fprintf(STDERR, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING); 1776 fprintf(STDERR, " with zlib version %s\n", ZLIB_VERSION); 1777 fprintf(STDERR, "%s", png_get_copyright(NULL)); 1778 /* Show the version of libpng used in building the library */ 1779 fprintf(STDERR, " library (%lu):%s", 1780 (unsigned long)png_access_version_number(), 1781 png_get_header_version(NULL)); 1782 1783 /* Show the version of libpng used in building the application */ 1784 fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER, 1785 PNG_HEADER_VERSION_STRING); 1786 1787 /* Do some consistency checking on the memory allocation settings, I'm 1788 * not sure this matters, but it is nice to know, the first of these 1789 * tests should be impossible because of the way the macros are set 1790 * in pngconf.h 1791 */ 1792#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) 1793 fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n"); 1794#endif 1795 /* I think the following can happen. */ 1796#if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K) 1797 fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n"); 1798#endif 1799 1800 if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING)) 1801 { 1802 fprintf(STDERR, 1803 "Warning: versions are different between png.h and png.c\n"); 1804 fprintf(STDERR, " png.h version: %s\n", PNG_LIBPNG_VER_STRING); 1805 fprintf(STDERR, " png.c version: %s\n\n", png_libpng_ver); 1806 ++ierror; 1807 } 1808 1809 if (argc > 1) 1810 { 1811 if (strcmp(argv[1], "-m") == 0) 1812 { 1813 multiple = 1; 1814 status_dots_requested = 0; 1815 } 1816 1817 else if (strcmp(argv[1], "-mv") == 0 || 1818 strcmp(argv[1], "-vm") == 0 ) 1819 { 1820 multiple = 1; 1821 verbose = 1; 1822 status_dots_requested = 1; 1823 } 1824 1825 else if (strcmp(argv[1], "-v") == 0) 1826 { 1827 verbose = 1; 1828 status_dots_requested = 1; 1829 inname = argv[2]; 1830 } 1831 1832 else if (strcmp(argv[1], "--strict") == 0) 1833 { 1834 status_dots_requested = 0; 1835 verbose = 1; 1836 inname = argv[2]; 1837 strict++; 1838 relaxed = 0; 1839 } 1840 1841 else if (strcmp(argv[1], "--relaxed") == 0) 1842 { 1843 status_dots_requested = 0; 1844 verbose = 1; 1845 inname = argv[2]; 1846 strict = 0; 1847 relaxed++; 1848 } 1849 1850 else 1851 { 1852 inname = argv[1]; 1853 status_dots_requested = 0; 1854 } 1855 } 1856 1857 if (multiple == 0 && argc == 3 + verbose) 1858 outname = argv[2 + verbose]; 1859 1860 if ((multiple == 0 && argc > 3 + verbose) || 1861 (multiple != 0 && argc < 2)) 1862 { 1863 fprintf(STDERR, 1864 "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n", 1865 argv[0], argv[0]); 1866 fprintf(STDERR, 1867 " reads/writes one PNG file (without -m) or multiple files (-m)\n"); 1868 fprintf(STDERR, 1869 " with -m %s is used as a temporary file\n", outname); 1870 exit(1); 1871 } 1872 1873 if (multiple != 0) 1874 { 1875 int i; 1876#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG 1877 int allocation_now = current_allocation; 1878#endif 1879 for (i=2; i<argc; ++i) 1880 { 1881 int kerror; 1882 fprintf(STDERR, "\n Testing %s:", argv[i]); 1883#if PNG_DEBUG > 0 1884 fprintf(STDERR, "\n"); 1885#endif 1886 kerror = test_one_file(argv[i], outname); 1887 if (kerror == 0) 1888 { 1889#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED 1890 fprintf(STDERR, "\n PASS (%lu zero samples)\n", 1891 (unsigned long)zero_samples); 1892#else 1893 fprintf(STDERR, " PASS\n"); 1894#endif 1895#ifdef PNG_TIME_RFC1123_SUPPORTED 1896 if (tIME_chunk_present != 0) 1897 fprintf(STDERR, " tIME = %s\n", tIME_string); 1898 1899 tIME_chunk_present = 0; 1900#endif /* TIME_RFC1123 */ 1901 } 1902 1903 else 1904 { 1905 fprintf(STDERR, " FAIL\n"); 1906 ierror += kerror; 1907 } 1908#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG 1909 if (allocation_now != current_allocation) 1910 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n", 1911 current_allocation - allocation_now); 1912 1913 if (current_allocation != 0) 1914 { 1915 memory_infop pinfo = pinformation; 1916 1917 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n", 1918 current_allocation); 1919 1920 while (pinfo != NULL) 1921 { 1922 fprintf(STDERR, " %lu bytes at %p\n", 1923 (unsigned long)pinfo->size, 1924 pinfo->pointer); 1925 pinfo = pinfo->next; 1926 } 1927 } 1928#endif 1929 } 1930#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG 1931 fprintf(STDERR, " Current memory allocation: %10d bytes\n", 1932 current_allocation); 1933 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n", 1934 maximum_allocation); 1935 fprintf(STDERR, " Total memory allocation: %10d bytes\n", 1936 total_allocation); 1937 fprintf(STDERR, " Number of allocations: %10d\n", 1938 num_allocations); 1939#endif 1940 } 1941 1942 else 1943 { 1944 int i; 1945 for (i = 0; i<3; ++i) 1946 { 1947 int kerror; 1948#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG 1949 int allocation_now = current_allocation; 1950#endif 1951 if (i == 1) 1952 status_dots_requested = 1; 1953 1954 else if (verbose == 0) 1955 status_dots_requested = 0; 1956 1957 if (i == 0 || verbose == 1 || ierror != 0) 1958 { 1959 fprintf(STDERR, "\n Testing %s:", inname); 1960#if PNG_DEBUG > 0 1961 fprintf(STDERR, "\n"); 1962#endif 1963 } 1964 1965 kerror = test_one_file(inname, outname); 1966 1967 if (kerror == 0) 1968 { 1969 if (verbose == 1 || i == 2) 1970 { 1971#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED 1972 fprintf(STDERR, "\n PASS (%lu zero samples)\n", 1973 (unsigned long)zero_samples); 1974#else 1975 fprintf(STDERR, " PASS\n"); 1976#endif 1977#ifdef PNG_TIME_RFC1123_SUPPORTED 1978 if (tIME_chunk_present != 0) 1979 fprintf(STDERR, " tIME = %s\n", tIME_string); 1980#endif /* TIME_RFC1123 */ 1981 } 1982 } 1983 1984 else 1985 { 1986 if (verbose == 0 && i != 2) 1987 { 1988 fprintf(STDERR, "\n Testing %s:", inname); 1989#if PNG_DEBUG > 0 1990 fprintf(STDERR, "\n"); 1991#endif 1992 } 1993 1994 fprintf(STDERR, " FAIL\n"); 1995 ierror += kerror; 1996 } 1997#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG 1998 if (allocation_now != current_allocation) 1999 fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n", 2000 current_allocation - allocation_now); 2001 2002 if (current_allocation != 0) 2003 { 2004 memory_infop pinfo = pinformation; 2005 2006 fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n", 2007 current_allocation); 2008 2009 while (pinfo != NULL) 2010 { 2011 fprintf(STDERR, " %lu bytes at %p\n", 2012 (unsigned long)pinfo->size, pinfo->pointer); 2013 pinfo = pinfo->next; 2014 } 2015 } 2016#endif 2017 } 2018#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG 2019 fprintf(STDERR, " Current memory allocation: %10d bytes\n", 2020 current_allocation); 2021 fprintf(STDERR, " Maximum memory allocation: %10d bytes\n", 2022 maximum_allocation); 2023 fprintf(STDERR, " Total memory allocation: %10d bytes\n", 2024 total_allocation); 2025 fprintf(STDERR, " Number of allocations: %10d\n", 2026 num_allocations); 2027#endif 2028 } 2029 2030#ifdef PNGTEST_TIMING 2031 t_stop = (float)clock(); 2032 t_misc += (t_stop - t_start); 2033 t_start = t_stop; 2034 fprintf(STDERR, " CPU time used = %.3f seconds", 2035 (t_misc+t_decode+t_encode)/(float)CLOCKS_PER_SEC); 2036 fprintf(STDERR, " (decoding %.3f,\n", 2037 t_decode/(float)CLOCKS_PER_SEC); 2038 fprintf(STDERR, " encoding %.3f ,", 2039 t_encode/(float)CLOCKS_PER_SEC); 2040 fprintf(STDERR, " other %.3f seconds)\n\n", 2041 t_misc/(float)CLOCKS_PER_SEC); 2042#endif 2043 2044 if (ierror == 0) 2045 fprintf(STDERR, " libpng passes test\n"); 2046 2047 else 2048 fprintf(STDERR, " libpng FAILS test\n"); 2049 2050 dummy_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); 2051 fprintf(STDERR, " Default limits:\n"); 2052 fprintf(STDERR, " width_max = %lu\n", 2053 (unsigned long) png_get_user_width_max(dummy_ptr)); 2054 fprintf(STDERR, " height_max = %lu\n", 2055 (unsigned long) png_get_user_height_max(dummy_ptr)); 2056 if (png_get_chunk_cache_max(dummy_ptr) == 0) 2057 fprintf(STDERR, " cache_max = unlimited\n"); 2058 else 2059 fprintf(STDERR, " cache_max = %lu\n", 2060 (unsigned long) png_get_chunk_cache_max(dummy_ptr)); 2061 if (png_get_chunk_malloc_max(dummy_ptr) == 0) 2062 fprintf(STDERR, " malloc_max = unlimited\n"); 2063 else 2064 fprintf(STDERR, " malloc_max = %lu\n", 2065 (unsigned long) png_get_chunk_malloc_max(dummy_ptr)); 2066 png_destroy_read_struct(&dummy_ptr, NULL, NULL); 2067 2068 return (int)(ierror != 0); 2069} 2070#else 2071int 2072main(void) 2073{ 2074 fprintf(STDERR, 2075 " test ignored because libpng was not built with read support\n"); 2076 /* And skip this test */ 2077 return SKIP; 2078} 2079#endif 2080 2081/* Generate a compiler error if there is an old png.h in the search path. */ 2082typedef png_libpng_version_1_6_22rc01 Your_png_h_is_not_version_1_6_22rc01; 2083