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/src/compiler/android/jni/ftk/pngtest.c

http://ftk.googlecode.com/
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   1
   2/* pngtest.c - a simple test program to test libpng
   3 *
   4 * Last changed in libpng 1.2.43 [February 25, 2010]
   5 * Copyright (c) 1998-2010 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 PNG_PEDANTIC_WARNINGS
  35#include "png.h"
  36
  37#ifdef _WIN32_WCE
  38#  if _WIN32_WCE < 211
  39     __error__ (f|w)printf functions are not supported on old WindowsCE.;
  40#  endif
  41#  include <windows.h>
  42#  include <stdlib.h>
  43#  define READFILE(file, data, length, check) \
  44     if (ReadFile(file, data, length, &check, NULL)) check = 0
  45#  define WRITEFILE(file, data, length, check)) \
  46     if (WriteFile(file, data, length, &check, NULL)) check = 0
  47#  define FCLOSE(file) CloseHandle(file)
  48#else
  49#  include <stdio.h>
  50#  include <stdlib.h>
  51#  define READFILE(file, data, length, check) \
  52     check=(png_size_t)fread(data, (png_size_t)1, length, file)
  53#  define WRITEFILE(file, data, length, check) \
  54     check=(png_size_t)fwrite(data, (png_size_t)1, length, file)
  55#  define FCLOSE(file) fclose(file)
  56#endif
  57
  58#ifndef PNG_STDIO_SUPPORTED
  59#  ifdef _WIN32_WCE
  60     typedef HANDLE                png_FILE_p;
  61#  else
  62     typedef FILE                * png_FILE_p;
  63#  endif
  64#endif
  65
  66/* Makes pngtest verbose so we can find problems (needs to be before png.h) */
  67#ifndef PNG_DEBUG
  68#  define PNG_DEBUG 0
  69#endif
  70
  71#if !PNG_DEBUG
  72#  define SINGLE_ROWBUF_ALLOC  /* Makes buffer overruns easier to nail */
  73#endif
  74
  75/* Turn on CPU timing
  76#define PNGTEST_TIMING
  77*/
  78
  79#ifndef PNG_FLOATING_POINT_SUPPORTED
  80#undef PNGTEST_TIMING
  81#endif
  82
  83#ifdef PNGTEST_TIMING
  84static float t_start, t_stop, t_decode, t_encode, t_misc;
  85#include <time.h>
  86#endif
  87
  88#ifdef PNG_TIME_RFC1123_SUPPORTED
  89#define PNG_tIME_STRING_LENGTH 29
  90static int tIME_chunk_present = 0;
  91static char tIME_string[PNG_tIME_STRING_LENGTH] = "tIME chunk is not present";
  92#endif
  93
  94static int verbose = 0;
  95
  96int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname));
  97
  98#ifdef __TURBOC__
  99#include <mem.h>
 100#endif
 101
 102/* Defined so I can write to a file on gui/windowing platforms */
 103/*  #define STDERR stderr  */
 104#define STDERR stdout   /* For DOS */
 105
 106/* In case a system header (e.g., on AIX) defined jmpbuf */
 107#ifdef jmpbuf
 108#  undef jmpbuf
 109#endif
 110
 111/* Define png_jmpbuf() in case we are using a pre-1.0.6 version of libpng */
 112#ifndef png_jmpbuf
 113#  define png_jmpbuf(png_ptr) png_ptr->jmpbuf
 114#endif
 115
 116/* Example of using row callbacks to make a simple progress meter */
 117static int status_pass = 1;
 118static int status_dots_requested = 0;
 119static int status_dots = 1;
 120
 121void
 122#ifdef PNG_1_0_X
 123PNGAPI
 124#endif
 125read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
 126void
 127#ifdef PNG_1_0_X
 128PNGAPI
 129#endif
 130read_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
 131{
 132   if (png_ptr == NULL || row_number > PNG_UINT_31_MAX)
 133      return;
 134   if (status_pass != pass)
 135   {
 136      fprintf(stdout, "\n Pass %d: ", pass);
 137      status_pass = pass;
 138      status_dots = 31;
 139   }
 140   status_dots--;
 141   if (status_dots == 0)
 142   {
 143      fprintf(stdout, "\n         ");
 144      status_dots=30;
 145   }
 146   fprintf(stdout, "r");
 147}
 148
 149void
 150#ifdef PNG_1_0_X
 151PNGAPI
 152#endif
 153write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass);
 154void
 155#ifdef PNG_1_0_X
 156PNGAPI
 157#endif
 158write_row_callback(png_structp png_ptr, png_uint_32 row_number, int pass)
 159{
 160   if (png_ptr == NULL || row_number > PNG_UINT_31_MAX || pass > 7)
 161      return;
 162   fprintf(stdout, "w");
 163}
 164
 165
 166#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
 167/* Example of using user transform callback (we don't transform anything,
 168 * but merely examine the row filters.  We set this to 256 rather than
 169 * 5 in case illegal filter values are present.)
 170 */
 171static png_uint_32 filters_used[256];
 172void
 173#ifdef PNG_1_0_X
 174PNGAPI
 175#endif
 176count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data);
 177void
 178#ifdef PNG_1_0_X
 179PNGAPI
 180#endif
 181count_filters(png_structp png_ptr, png_row_infop row_info, png_bytep data)
 182{
 183   if (png_ptr != NULL && row_info != NULL)
 184      ++filters_used[*(data - 1)];
 185}
 186#endif
 187
 188#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
 189/* Example of using user transform callback (we don't transform anything,
 190 * but merely count the zero samples)
 191 */
 192
 193static png_uint_32 zero_samples;
 194
 195void
 196#ifdef PNG_1_0_X
 197PNGAPI
 198#endif
 199count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data);
 200void
 201#ifdef PNG_1_0_X
 202PNGAPI
 203#endif
 204count_zero_samples(png_structp png_ptr, png_row_infop row_info, png_bytep data)
 205{
 206   png_bytep dp = data;
 207   if (png_ptr == NULL)return;
 208
 209   /* Contents of row_info:
 210    *  png_uint_32 width      width of row
 211    *  png_uint_32 rowbytes   number of bytes in row
 212    *  png_byte color_type    color type of pixels
 213    *  png_byte bit_depth     bit depth of samples
 214    *  png_byte channels      number of channels (1-4)
 215    *  png_byte pixel_depth   bits per pixel (depth*channels)
 216    */
 217
 218    /* Counts the number of zero samples (or zero pixels if color_type is 3 */
 219
 220    if (row_info->color_type == 0 || row_info->color_type == 3)
 221    {
 222       int pos = 0;
 223       png_uint_32 n, nstop;
 224       for (n = 0, nstop=row_info->width; n<nstop; n++)
 225       {
 226          if (row_info->bit_depth == 1)
 227          {
 228             if (((*dp << pos++ ) & 0x80) == 0)
 229                zero_samples++;
 230             if (pos == 8)
 231             {
 232                pos = 0;
 233                dp++;
 234             }
 235          }
 236          if (row_info->bit_depth == 2)
 237          {
 238             if (((*dp << (pos+=2)) & 0xc0) == 0)
 239                zero_samples++;
 240             if (pos == 8)
 241             {
 242                pos = 0;
 243                dp++;
 244             }
 245          }
 246          if (row_info->bit_depth == 4)
 247          {
 248             if (((*dp << (pos+=4)) & 0xf0) == 0)
 249                zero_samples++;
 250             if (pos == 8)
 251             {
 252                pos = 0;
 253                dp++;
 254             }
 255          }
 256          if (row_info->bit_depth == 8)
 257             if (*dp++ == 0)
 258                zero_samples++;
 259          if (row_info->bit_depth == 16)
 260          {
 261             if ((*dp | *(dp+1)) == 0)
 262                zero_samples++;
 263             dp+=2;
 264          }
 265       }
 266    }
 267    else /* Other color types */
 268    {
 269       png_uint_32 n, nstop;
 270       int channel;
 271       int color_channels = row_info->channels;
 272       if (row_info->color_type > 3)color_channels--;
 273
 274       for (n = 0, nstop=row_info->width; n<nstop; n++)
 275       {
 276          for (channel = 0; channel < color_channels; channel++)
 277          {
 278             if (row_info->bit_depth == 8)
 279                if (*dp++ == 0)
 280                   zero_samples++;
 281             if (row_info->bit_depth == 16)
 282             {
 283                if ((*dp | *(dp+1)) == 0)
 284                   zero_samples++;
 285                dp+=2;
 286             }
 287          }
 288          if (row_info->color_type > 3)
 289          {
 290             dp++;
 291             if (row_info->bit_depth == 16)
 292                dp++;
 293          }
 294       }
 295    }
 296}
 297#endif /* PNG_WRITE_USER_TRANSFORM_SUPPORTED */
 298
 299static int wrote_question = 0;
 300
 301#ifndef PNG_STDIO_SUPPORTED
 302/* START of code to validate stdio-free compilation */
 303/* These copies of the default read/write functions come from pngrio.c and
 304 * pngwio.c.  They allow "don't include stdio" testing of the library.
 305 * This is the function that does the actual reading of data.  If you are
 306 * not reading from a standard C stream, you should create a replacement
 307 * read_data function and use it at run time with png_set_read_fn(), rather
 308 * than changing the library.
 309 */
 310
 311#ifndef USE_FAR_KEYWORD
 312static void
 313pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 314{
 315   png_size_t check = 0;
 316   png_voidp io_ptr;
 317
 318   /* fread() returns 0 on error, so it is OK to store this in a png_size_t
 319    * instead of an int, which is what fread() actually returns.
 320    */
 321   io_ptr = png_get_io_ptr(png_ptr);
 322   if (io_ptr != NULL)
 323   {
 324      READFILE((png_FILE_p)io_ptr, data, length, check);
 325   }
 326
 327   if (check != length)
 328   {
 329      png_error(png_ptr, "Read Error!");
 330   }
 331}
 332#else
 333/* This is the model-independent version. Since the standard I/O library
 334   can't handle far buffers in the medium and small models, we have to copy
 335   the data.
 336*/
 337
 338#define NEAR_BUF_SIZE 1024
 339#define MIN(a,b) (a <= b ? a : b)
 340
 341static void
 342pngtest_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
 343{
 344   int check;
 345   png_byte *n_data;
 346   png_FILE_p io_ptr;
 347
 348   /* Check if data really is near. If so, use usual code. */
 349   n_data = (png_byte *)CVT_PTR_NOCHECK(data);
 350   io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
 351   if ((png_bytep)n_data == data)
 352   {
 353      READFILE(io_ptr, n_data, length, check);
 354   }
 355   else
 356   {
 357      png_byte buf[NEAR_BUF_SIZE];
 358      png_size_t read, remaining, err;
 359      check = 0;
 360      remaining = length;
 361      do
 362      {
 363         read = MIN(NEAR_BUF_SIZE, remaining);
 364         READFILE(io_ptr, buf, 1, err);
 365         png_memcpy(data, buf, read); /* Copy far buffer to near buffer */
 366         if (err != read)
 367            break;
 368         else
 369            check += err;
 370         data += read;
 371         remaining -= read;
 372      }
 373      while (remaining != 0);
 374   }
 375   if (check != length)
 376      png_error(png_ptr, "read Error");
 377}
 378#endif /* USE_FAR_KEYWORD */
 379
 380#ifdef PNG_WRITE_FLUSH_SUPPORTED
 381static void
 382pngtest_flush(png_structp png_ptr)
 383{
 384   /* Do nothing; fflush() is said to be just a waste of energy. */
 385   png_ptr = png_ptr;  /* Stifle compiler warning */
 386}
 387#endif
 388
 389/* This is the function that does the actual writing of data.  If you are
 390 * not writing to a standard C stream, you should create a replacement
 391 * write_data function and use it at run time with png_set_write_fn(), rather
 392 * than changing the library.
 393 */
 394#ifndef USE_FAR_KEYWORD
 395static void
 396pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
 397{
 398   png_uint_32 check;
 399
 400   WRITEFILE((png_FILE_p)png_ptr->io_ptr,  data, length, check);
 401   if (check != length)
 402   {
 403      png_error(png_ptr, "Write Error");
 404   }
 405}
 406#else
 407/* This is the model-independent version. Since the standard I/O library
 408   can't handle far buffers in the medium and small models, we have to copy
 409   the data.
 410*/
 411
 412#define NEAR_BUF_SIZE 1024
 413#define MIN(a,b) (a <= b ? a : b)
 414
 415static void
 416pngtest_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
 417{
 418   png_uint_32 check;
 419   png_byte *near_data;  /* Needs to be "png_byte *" instead of "png_bytep" */
 420   png_FILE_p io_ptr;
 421
 422   /* Check if data really is near. If so, use usual code. */
 423   near_data = (png_byte *)CVT_PTR_NOCHECK(data);
 424   io_ptr = (png_FILE_p)CVT_PTR(png_ptr->io_ptr);
 425   if ((png_bytep)near_data == data)
 426   {
 427      WRITEFILE(io_ptr, near_data, length, check);
 428   }
 429   else
 430   {
 431      png_byte buf[NEAR_BUF_SIZE];
 432      png_size_t written, remaining, err;
 433      check = 0;
 434      remaining = length;
 435      do
 436      {
 437         written = MIN(NEAR_BUF_SIZE, remaining);
 438         png_memcpy(buf, data, written); /* Copy far buffer to near buffer */
 439         WRITEFILE(io_ptr, buf, written, err);
 440         if (err != written)
 441            break;
 442         else
 443            check += err;
 444         data += written;
 445         remaining -= written;
 446      }
 447      while (remaining != 0);
 448   }
 449   if (check != length)
 450   {
 451      png_error(png_ptr, "Write Error");
 452   }
 453}
 454#endif /* USE_FAR_KEYWORD */
 455
 456/* This function is called when there is a warning, but the library thinks
 457 * it can continue anyway.  Replacement functions don't have to do anything
 458 * here if you don't want to.  In the default configuration, png_ptr is
 459 * not used, but it is passed in case it may be useful.
 460 */
 461static void
 462pngtest_warning(png_structp png_ptr, png_const_charp message)
 463{
 464   PNG_CONST char *name = "UNKNOWN (ERROR!)";
 465   char *test;
 466   test = png_get_error_ptr(png_ptr);
 467   if (test == NULL)
 468     fprintf(STDERR, "%s: libpng warning: %s\n", name, message);
 469   else
 470     fprintf(STDERR, "%s: libpng warning: %s\n", test, message);
 471}
 472
 473/* This is the default error handling function.  Note that replacements for
 474 * this function MUST NOT RETURN, or the program will likely crash.  This
 475 * function is used by default, or if the program supplies NULL for the
 476 * error function pointer in png_set_error_fn().
 477 */
 478static void
 479pngtest_error(png_structp png_ptr, png_const_charp message)
 480{
 481   pngtest_warning(png_ptr, message);
 482   /* We can return because png_error calls the default handler, which is
 483    * actually OK in this case.
 484    */
 485}
 486#endif /* !PNG_STDIO_SUPPORTED */
 487/* END of code to validate stdio-free compilation */
 488
 489/* START of code to validate memory allocation and deallocation */
 490#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
 491
 492/* Allocate memory.  For reasonable files, size should never exceed
 493 * 64K.  However, zlib may allocate more then 64K if you don't tell
 494 * it not to.  See zconf.h and png.h for more information.  zlib does
 495 * need to allocate exactly 64K, so whatever you call here must
 496 * have the ability to do that.
 497 *
 498 * This piece of code can be compiled to validate max 64K allocations
 499 * by setting MAXSEG_64K in zlib zconf.h *or* PNG_MAX_MALLOC_64K.
 500 */
 501typedef struct memory_information
 502{
 503   png_uint_32               size;
 504   png_voidp                 pointer;
 505   struct memory_information FAR *next;
 506} memory_information;
 507typedef memory_information FAR *memory_infop;
 508
 509static memory_infop pinformation = NULL;
 510static int current_allocation = 0;
 511static int maximum_allocation = 0;
 512static int total_allocation = 0;
 513static int num_allocations = 0;
 514
 515png_voidp png_debug_malloc PNGARG((png_structp png_ptr, png_uint_32 size));
 516void png_debug_free PNGARG((png_structp png_ptr, png_voidp ptr));
 517
 518png_voidp
 519png_debug_malloc(png_structp png_ptr, png_uint_32 size)
 520{
 521
 522   /* png_malloc has already tested for NULL; png_create_struct calls
 523    * png_debug_malloc directly, with png_ptr == NULL which is OK
 524    */
 525
 526   if (size == 0)
 527      return (NULL);
 528
 529   /* This calls the library allocator twice, once to get the requested
 530      buffer and once to get a new free list entry. */
 531   {
 532      /* Disable malloc_fn and free_fn */
 533      memory_infop pinfo;
 534      png_set_mem_fn(png_ptr, NULL, NULL, NULL);
 535      pinfo = (memory_infop)png_malloc(png_ptr,
 536         (png_uint_32)png_sizeof(*pinfo));
 537      pinfo->size = size;
 538      current_allocation += size;
 539      total_allocation += size;
 540      num_allocations ++;
 541      if (current_allocation > maximum_allocation)
 542         maximum_allocation = current_allocation;
 543      pinfo->pointer = (png_voidp)png_malloc(png_ptr, size);
 544      /* Restore malloc_fn and free_fn */
 545      png_set_mem_fn(png_ptr,
 546          png_voidp_NULL, (png_malloc_ptr)png_debug_malloc,
 547          (png_free_ptr)png_debug_free);
 548      if (size != 0 && pinfo->pointer == NULL)
 549      {
 550         current_allocation -= size;
 551         total_allocation -= size;
 552         png_error(png_ptr,
 553           "out of memory in pngtest->png_debug_malloc.");
 554      }
 555      pinfo->next = pinformation;
 556      pinformation = pinfo;
 557      /* Make sure the caller isn't assuming zeroed memory. */
 558      png_memset(pinfo->pointer, 0xdd, pinfo->size);
 559      if (verbose)
 560         printf("png_malloc %lu bytes at %x\n", (unsigned long)size,
 561            pinfo->pointer);
 562      return (png_voidp)(pinfo->pointer);
 563   }
 564}
 565
 566/* Free a pointer.  It is removed from the list at the same time. */
 567void
 568png_debug_free(png_structp png_ptr, png_voidp ptr)
 569{
 570   if (png_ptr == NULL)
 571      fprintf(STDERR, "NULL pointer to png_debug_free.\n");
 572   if (ptr == 0)
 573   {
 574#if 0 /* This happens all the time. */
 575      fprintf(STDERR, "WARNING: freeing NULL pointer\n");
 576#endif
 577      return;
 578   }
 579
 580   /* Unlink the element from the list. */
 581   {
 582      memory_infop FAR *ppinfo = &pinformation;
 583      for (;;)
 584      {
 585         memory_infop pinfo = *ppinfo;
 586         if (pinfo->pointer == ptr)
 587         {
 588            *ppinfo = pinfo->next;
 589            current_allocation -= pinfo->size;
 590            if (current_allocation < 0)
 591               fprintf(STDERR, "Duplicate free of memory\n");
 592            /* We must free the list element too, but first kill
 593               the memory that is to be freed. */
 594            png_memset(ptr, 0x55, pinfo->size);
 595            png_free_default(png_ptr, pinfo);
 596            pinfo = NULL;
 597            break;
 598         }
 599         if (pinfo->next == NULL)
 600         {
 601            fprintf(STDERR, "Pointer %x not found\n", (unsigned int)ptr);
 602            break;
 603         }
 604         ppinfo = &pinfo->next;
 605      }
 606   }
 607
 608   /* Finally free the data. */
 609   if (verbose)
 610      printf("Freeing %x\n", ptr);
 611   png_free_default(png_ptr, ptr);
 612   ptr = NULL;
 613}
 614#endif /* PNG_USER_MEM_SUPPORTED && PNG_DEBUG */
 615/* END of code to test memory allocation/deallocation */
 616
 617
 618/* Demonstration of user chunk support of the sTER and vpAg chunks */
 619#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
 620
 621/* (sTER is a public chunk not yet known by libpng.  vpAg is a private
 622chunk used in ImageMagick to store "virtual page" size).  */
 623
 624static png_uint_32 user_chunk_data[4];
 625
 626    /* 0: sTER mode + 1
 627     * 1: vpAg width
 628     * 2: vpAg height
 629     * 3: vpAg units
 630     */
 631
 632static int read_user_chunk_callback(png_struct *png_ptr,
 633   png_unknown_chunkp chunk)
 634{
 635   png_uint_32
 636     *my_user_chunk_data;
 637
 638   /* Return one of the following:
 639    *    return (-n);  chunk had an error
 640    *    return (0);  did not recognize
 641    *    return (n);  success
 642    *
 643    * The unknown chunk structure contains the chunk data:
 644    * png_byte name[5];
 645    * png_byte *data;
 646    * png_size_t size;
 647    *
 648    * Note that libpng has already taken care of the CRC handling.
 649    */
 650
 651   if (chunk->name[0] == 115 && chunk->name[1] ==  84 &&     /* s  T */
 652       chunk->name[2] ==  69 && chunk->name[3] ==  82)       /* E  R */
 653      {
 654         /* Found sTER chunk */
 655         if (chunk->size != 1)
 656            return (-1); /* Error return */
 657         if (chunk->data[0] != 0 && chunk->data[0] != 1)
 658            return (-1);  /* Invalid mode */
 659         my_user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
 660         my_user_chunk_data[0]=chunk->data[0]+1;
 661         return (1);
 662      }
 663
 664   if (chunk->name[0] != 118 || chunk->name[1] != 112 ||    /* v  p */
 665       chunk->name[2] !=  65 || chunk->name[3] != 103)      /* A  g */
 666      return (0); /* Did not recognize */
 667
 668   /* Found ImageMagick vpAg chunk */
 669
 670   if (chunk->size != 9)
 671      return (-1); /* Error return */
 672
 673   my_user_chunk_data=(png_uint_32 *) png_get_user_chunk_ptr(png_ptr);
 674
 675   my_user_chunk_data[1]=png_get_uint_31(png_ptr, chunk->data);
 676   my_user_chunk_data[2]=png_get_uint_31(png_ptr, chunk->data + 4);
 677   my_user_chunk_data[3]=(png_uint_32)chunk->data[8];
 678
 679   return (1);
 680
 681}
 682#endif
 683/* END of code to demonstrate user chunk support */
 684
 685/* Test one file */
 686int
 687test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 688{
 689   static png_FILE_p fpin;
 690   static png_FILE_p fpout;  /* "static" prevents setjmp corruption */
 691   png_structp read_ptr;
 692   png_infop read_info_ptr, end_info_ptr;
 693#ifdef PNG_WRITE_SUPPORTED
 694   png_structp write_ptr;
 695   png_infop write_info_ptr;
 696   png_infop write_end_info_ptr;
 697#else
 698   png_structp write_ptr = NULL;
 699   png_infop write_info_ptr = NULL;
 700   png_infop write_end_info_ptr = NULL;
 701#endif
 702   png_bytep row_buf;
 703   png_uint_32 y;
 704   png_uint_32 width, height;
 705   int num_pass, pass;
 706   int bit_depth, color_type;
 707#ifdef PNG_SETJMP_SUPPORTED
 708#ifdef USE_FAR_KEYWORD
 709   jmp_buf jmpbuf;
 710#endif
 711#endif
 712
 713#ifdef _WIN32_WCE
 714   TCHAR path[MAX_PATH];
 715#endif
 716   char inbuf[256], outbuf[256];
 717
 718   row_buf = NULL;
 719
 720#ifdef _WIN32_WCE
 721   MultiByteToWideChar(CP_ACP, 0, inname, -1, path, MAX_PATH);
 722   if ((fpin = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0,
 723       NULL)) == INVALID_HANDLE_VALUE)
 724#else
 725   if ((fpin = fopen(inname, "rb")) == NULL)
 726#endif
 727   {
 728      fprintf(STDERR, "Could not find input file %s\n", inname);
 729      return (1);
 730   }
 731
 732#ifdef _WIN32_WCE
 733   MultiByteToWideChar(CP_ACP, 0, outname, -1, path, MAX_PATH);
 734   if ((fpout = CreateFile(path, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS,
 735       0, NULL)) == INVALID_HANDLE_VALUE)
 736#else
 737   if ((fpout = fopen(outname, "wb")) == NULL)
 738#endif
 739   {
 740      fprintf(STDERR, "Could not open output file %s\n", outname);
 741      FCLOSE(fpin);
 742      return (1);
 743   }
 744
 745   png_debug(0, "Allocating read and write structures");
 746#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
 747   read_ptr =
 748      png_create_read_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
 749      png_error_ptr_NULL, png_error_ptr_NULL, png_voidp_NULL,
 750      (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
 751#else
 752   read_ptr =
 753      png_create_read_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
 754      png_error_ptr_NULL, png_error_ptr_NULL);
 755#endif
 756#ifndef PNG_STDIO_SUPPORTED
 757   png_set_error_fn(read_ptr, (png_voidp)inname, pngtest_error,
 758       pngtest_warning);
 759#endif
 760
 761#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
 762   user_chunk_data[0] = 0;
 763   user_chunk_data[1] = 0;
 764   user_chunk_data[2] = 0;
 765   user_chunk_data[3] = 0;
 766   png_set_read_user_chunk_fn(read_ptr, user_chunk_data,
 767     read_user_chunk_callback);
 768
 769#endif
 770#ifdef PNG_WRITE_SUPPORTED
 771#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
 772   write_ptr =
 773      png_create_write_struct_2(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
 774      png_error_ptr_NULL, png_error_ptr_NULL, png_voidp_NULL,
 775      (png_malloc_ptr)png_debug_malloc, (png_free_ptr)png_debug_free);
 776#else
 777   write_ptr =
 778      png_create_write_struct(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
 779      png_error_ptr_NULL, png_error_ptr_NULL);
 780#endif
 781#ifndef PNG_STDIO_SUPPORTED
 782   png_set_error_fn(write_ptr, (png_voidp)inname, pngtest_error,
 783       pngtest_warning);
 784#endif
 785#endif
 786   png_debug(0, "Allocating read_info, write_info and end_info structures");
 787   read_info_ptr = png_create_info_struct(read_ptr);
 788   end_info_ptr = png_create_info_struct(read_ptr);
 789#ifdef PNG_WRITE_SUPPORTED
 790   write_info_ptr = png_create_info_struct(write_ptr);
 791   write_end_info_ptr = png_create_info_struct(write_ptr);
 792#endif
 793
 794#ifdef PNG_SETJMP_SUPPORTED
 795   png_debug(0, "Setting jmpbuf for read struct");
 796#ifdef USE_FAR_KEYWORD
 797   if (setjmp(jmpbuf))
 798#else
 799   if (setjmp(png_jmpbuf(read_ptr)))
 800#endif
 801   {
 802      fprintf(STDERR, "%s -> %s: libpng read error\n", inname, outname);
 803      png_free(read_ptr, row_buf);
 804      row_buf = NULL;
 805      png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
 806#ifdef PNG_WRITE_SUPPORTED
 807      png_destroy_info_struct(write_ptr, &write_end_info_ptr);
 808      png_destroy_write_struct(&write_ptr, &write_info_ptr);
 809#endif
 810      FCLOSE(fpin);
 811      FCLOSE(fpout);
 812      return (1);
 813   }
 814#ifdef USE_FAR_KEYWORD
 815   png_memcpy(png_jmpbuf(read_ptr), jmpbuf, png_sizeof(jmp_buf));
 816#endif
 817
 818#ifdef PNG_WRITE_SUPPORTED
 819   png_debug(0, "Setting jmpbuf for write struct");
 820#ifdef USE_FAR_KEYWORD
 821   if (setjmp(jmpbuf))
 822#else
 823   if (setjmp(png_jmpbuf(write_ptr)))
 824#endif
 825   {
 826      fprintf(STDERR, "%s -> %s: libpng write error\n", inname, outname);
 827      png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
 828      png_destroy_info_struct(write_ptr, &write_end_info_ptr);
 829#ifdef PNG_WRITE_SUPPORTED
 830      png_destroy_write_struct(&write_ptr, &write_info_ptr);
 831#endif
 832      FCLOSE(fpin);
 833      FCLOSE(fpout);
 834      return (1);
 835   }
 836#ifdef USE_FAR_KEYWORD
 837   png_memcpy(png_jmpbuf(write_ptr), jmpbuf, png_sizeof(jmp_buf));
 838#endif
 839#endif
 840#endif
 841
 842   png_debug(0, "Initializing input and output streams");
 843#ifdef PNG_STDIO_SUPPORTED
 844   png_init_io(read_ptr, fpin);
 845#  ifdef PNG_WRITE_SUPPORTED
 846   png_init_io(write_ptr, fpout);
 847#  endif
 848#else
 849   png_set_read_fn(read_ptr, (png_voidp)fpin, pngtest_read_data);
 850#  ifdef PNG_WRITE_SUPPORTED
 851   png_set_write_fn(write_ptr, (png_voidp)fpout,  pngtest_write_data,
 852#    ifdef PNG_WRITE_FLUSH_SUPPORTED
 853      pngtest_flush);
 854#    else
 855      NULL);
 856#    endif
 857#  endif
 858#endif
 859   if (status_dots_requested == 1)
 860   {
 861#ifdef PNG_WRITE_SUPPORTED
 862      png_set_write_status_fn(write_ptr, write_row_callback);
 863#endif
 864      png_set_read_status_fn(read_ptr, read_row_callback);
 865   }
 866   else
 867   {
 868#ifdef PNG_WRITE_SUPPORTED
 869      png_set_write_status_fn(write_ptr, png_write_status_ptr_NULL);
 870#endif
 871      png_set_read_status_fn(read_ptr, png_read_status_ptr_NULL);
 872   }
 873
 874#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
 875   {
 876      int i;
 877      for (i = 0; i<256; i++)
 878         filters_used[i] = 0;
 879      png_set_read_user_transform_fn(read_ptr, count_filters);
 880   }
 881#endif
 882#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
 883   zero_samples = 0;
 884   png_set_write_user_transform_fn(write_ptr, count_zero_samples);
 885#endif
 886
 887#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
 888#  ifndef PNG_HANDLE_CHUNK_ALWAYS
 889#    define PNG_HANDLE_CHUNK_ALWAYS       3
 890#  endif
 891   png_set_keep_unknown_chunks(read_ptr, PNG_HANDLE_CHUNK_ALWAYS,
 892      png_bytep_NULL, 0);
 893#endif
 894#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
 895#  ifndef PNG_HANDLE_CHUNK_IF_SAFE
 896#    define PNG_HANDLE_CHUNK_IF_SAFE      2
 897#  endif
 898   png_set_keep_unknown_chunks(write_ptr, PNG_HANDLE_CHUNK_IF_SAFE,
 899      png_bytep_NULL, 0);
 900#endif
 901
 902   png_debug(0, "Reading info struct");
 903   png_read_info(read_ptr, read_info_ptr);
 904
 905   png_debug(0, "Transferring info struct");
 906   {
 907      int interlace_type, compression_type, filter_type;
 908
 909      if (png_get_IHDR(read_ptr, read_info_ptr, &width, &height, &bit_depth,
 910          &color_type, &interlace_type, &compression_type, &filter_type))
 911      {
 912         png_set_IHDR(write_ptr, write_info_ptr, width, height, bit_depth,
 913#ifdef PNG_WRITE_INTERLACING_SUPPORTED
 914            color_type, interlace_type, compression_type, filter_type);
 915#else
 916            color_type, PNG_INTERLACE_NONE, compression_type, filter_type);
 917#endif
 918      }
 919   }
 920#ifdef PNG_FIXED_POINT_SUPPORTED
 921#ifdef PNG_cHRM_SUPPORTED
 922   {
 923      png_fixed_point white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
 924         blue_y;
 925      if (png_get_cHRM_fixed(read_ptr, read_info_ptr, &white_x, &white_y,
 926         &red_x, &red_y, &green_x, &green_y, &blue_x, &blue_y))
 927      {
 928         png_set_cHRM_fixed(write_ptr, write_info_ptr, white_x, white_y, red_x,
 929            red_y, green_x, green_y, blue_x, blue_y);
 930      }
 931   }
 932#endif
 933#ifdef PNG_gAMA_SUPPORTED
 934   {
 935      png_fixed_point gamma;
 936
 937      if (png_get_gAMA_fixed(read_ptr, read_info_ptr, &gamma))
 938         png_set_gAMA_fixed(write_ptr, write_info_ptr, gamma);
 939   }
 940#endif
 941#else /* Use floating point versions */
 942#ifdef PNG_FLOATING_POINT_SUPPORTED
 943#ifdef PNG_cHRM_SUPPORTED
 944   {
 945      double white_x, white_y, red_x, red_y, green_x, green_y, blue_x,
 946         blue_y;
 947      if (png_get_cHRM(read_ptr, read_info_ptr, &white_x, &white_y, &red_x,
 948         &red_y, &green_x, &green_y, &blue_x, &blue_y))
 949      {
 950         png_set_cHRM(write_ptr, write_info_ptr, white_x, white_y, red_x,
 951            red_y, green_x, green_y, blue_x, blue_y);
 952      }
 953   }
 954#endif
 955#ifdef PNG_gAMA_SUPPORTED
 956   {
 957      double gamma;
 958
 959      if (png_get_gAMA(read_ptr, read_info_ptr, &gamma))
 960         png_set_gAMA(write_ptr, write_info_ptr, gamma);
 961   }
 962#endif
 963#endif /* Floating point */
 964#endif /* Fixed point */
 965#ifdef PNG_iCCP_SUPPORTED
 966   {
 967      png_charp name;
 968      png_charp profile;
 969      png_uint_32 proflen;
 970      int compression_type;
 971
 972      if (png_get_iCCP(read_ptr, read_info_ptr, &name, &compression_type,
 973                      &profile, &proflen))
 974      {
 975         png_set_iCCP(write_ptr, write_info_ptr, name, compression_type,
 976                      profile, proflen);
 977      }
 978   }
 979#endif
 980#ifdef PNG_sRGB_SUPPORTED
 981   {
 982      int intent;
 983
 984      if (png_get_sRGB(read_ptr, read_info_ptr, &intent))
 985         png_set_sRGB(write_ptr, write_info_ptr, intent);
 986   }
 987#endif
 988   {
 989      png_colorp palette;
 990      int num_palette;
 991
 992      if (png_get_PLTE(read_ptr, read_info_ptr, &palette, &num_palette))
 993         png_set_PLTE(write_ptr, write_info_ptr, palette, num_palette);
 994   }
 995#ifdef PNG_bKGD_SUPPORTED
 996   {
 997      png_color_16p background;
 998
 999      if (png_get_bKGD(read_ptr, read_info_ptr, &background))
1000      {
1001         png_set_bKGD(write_ptr, write_info_ptr, background);
1002      }
1003   }
1004#endif
1005#ifdef PNG_hIST_SUPPORTED
1006   {
1007      png_uint_16p hist;
1008
1009      if (png_get_hIST(read_ptr, read_info_ptr, &hist))
1010         png_set_hIST(write_ptr, write_info_ptr, hist);
1011   }
1012#endif
1013#ifdef PNG_oFFs_SUPPORTED
1014   {
1015      png_int_32 offset_x, offset_y;
1016      int unit_type;
1017
1018      if (png_get_oFFs(read_ptr, read_info_ptr, &offset_x, &offset_y,
1019          &unit_type))
1020      {
1021         png_set_oFFs(write_ptr, write_info_ptr, offset_x, offset_y, unit_type);
1022      }
1023   }
1024#endif
1025#ifdef PNG_pCAL_SUPPORTED
1026   {
1027      png_charp purpose, units;
1028      png_charpp params;
1029      png_int_32 X0, X1;
1030      int type, nparams;
1031
1032      if (png_get_pCAL(read_ptr, read_info_ptr, &purpose, &X0, &X1, &type,
1033         &nparams, &units, &params))
1034      {
1035         png_set_pCAL(write_ptr, write_info_ptr, purpose, X0, X1, type,
1036            nparams, units, params);
1037      }
1038   }
1039#endif
1040#ifdef PNG_pHYs_SUPPORTED
1041   {
1042      png_uint_32 res_x, res_y;
1043      int unit_type;
1044
1045      if (png_get_pHYs(read_ptr, read_info_ptr, &res_x, &res_y, &unit_type))
1046         png_set_pHYs(write_ptr, write_info_ptr, res_x, res_y, unit_type);
1047   }
1048#endif
1049#ifdef PNG_sBIT_SUPPORTED
1050   {
1051      png_color_8p sig_bit;
1052
1053      if (png_get_sBIT(read_ptr, read_info_ptr, &sig_bit))
1054         png_set_sBIT(write_ptr, write_info_ptr, sig_bit);
1055   }
1056#endif
1057#ifdef PNG_sCAL_SUPPORTED
1058#ifdef PNG_FLOATING_POINT_SUPPORTED
1059   {
1060      int unit;
1061      double scal_width, scal_height;
1062
1063      if (png_get_sCAL(read_ptr, read_info_ptr, &unit, &scal_width,
1064         &scal_height))
1065      {
1066         png_set_sCAL(write_ptr, write_info_ptr, unit, scal_width, scal_height);
1067      }
1068   }
1069#else
1070#ifdef PNG_FIXED_POINT_SUPPORTED
1071   {
1072      int unit;
1073      png_charp scal_width, scal_height;
1074
1075      if (png_get_sCAL_s(read_ptr, read_info_ptr, &unit, &scal_width,
1076          &scal_height))
1077      {
1078         png_set_sCAL_s(write_ptr, write_info_ptr, unit, scal_width,
1079             scal_height);
1080      }
1081   }
1082#endif
1083#endif
1084#endif
1085#ifdef PNG_TEXT_SUPPORTED
1086   {
1087      png_textp text_ptr;
1088      int num_text;
1089
1090      if (png_get_text(read_ptr, read_info_ptr, &text_ptr, &num_text) > 0)
1091      {
1092         png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks", num_text);
1093         png_set_text(write_ptr, write_info_ptr, text_ptr, num_text);
1094      }
1095   }
1096#endif
1097#ifdef PNG_tIME_SUPPORTED
1098   {
1099      png_timep mod_time;
1100
1101      if (png_get_tIME(read_ptr, read_info_ptr, &mod_time))
1102      {
1103         png_set_tIME(write_ptr, write_info_ptr, mod_time);
1104#ifdef PNG_TIME_RFC1123_SUPPORTED
1105         /* We have to use png_memcpy instead of "=" because the string
1106          * pointed to by png_convert_to_rfc1123() gets free'ed before
1107          * we use it.
1108          */
1109         png_memcpy(tIME_string,
1110                    png_convert_to_rfc1123(read_ptr, mod_time),
1111                    png_sizeof(tIME_string));
1112         tIME_string[png_sizeof(tIME_string) - 1] = '\0';
1113         tIME_chunk_present++;
1114#endif /* PNG_TIME_RFC1123_SUPPORTED */
1115      }
1116   }
1117#endif
1118#ifdef PNG_tRNS_SUPPORTED
1119   {
1120      png_bytep trans;
1121      int num_trans;
1122      png_color_16p trans_values;
1123
1124      if (png_get_tRNS(read_ptr, read_info_ptr, &trans, &num_trans,
1125         &trans_values))
1126      {
1127         int sample_max = (1 << bit_depth);
1128         /* libpng doesn't reject a tRNS chunk with out-of-range samples */
1129         if (!((color_type == PNG_COLOR_TYPE_GRAY &&
1130             (int)trans_values->gray > sample_max) ||
1131             (color_type == PNG_COLOR_TYPE_RGB &&
1132             ((int)trans_values->red > sample_max ||
1133             (int)trans_values->green > sample_max ||
1134             (int)trans_values->blue > sample_max))))
1135            png_set_tRNS(write_ptr, write_info_ptr, trans, num_trans,
1136               trans_values);
1137      }
1138   }
1139#endif
1140#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1141   {
1142      png_unknown_chunkp unknowns;
1143      int num_unknowns = (int)png_get_unknown_chunks(read_ptr, read_info_ptr,
1144         &unknowns);
1145      if (num_unknowns)
1146      {
1147         png_size_t i;
1148         png_set_unknown_chunks(write_ptr, write_info_ptr, unknowns,
1149           num_unknowns);
1150         /* Copy the locations from the read_info_ptr.  The automatically
1151          * generated locations in write_info_ptr are wrong because we
1152          * haven't written anything yet.
1153          */
1154         for (i = 0; i < (png_size_t)num_unknowns; i++)
1155           png_set_unknown_chunk_location(write_ptr, write_info_ptr, i,
1156             unknowns[i].location);
1157      }
1158   }
1159#endif
1160
1161#ifdef PNG_WRITE_SUPPORTED
1162   png_debug(0, "Writing info struct");
1163
1164/* If we wanted, we could write info in two steps:
1165 * png_write_info_before_PLTE(write_ptr, write_info_ptr);
1166 */
1167   png_write_info(write_ptr, write_info_ptr);
1168
1169#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
1170   if (user_chunk_data[0] != 0)
1171   {
1172      png_byte png_sTER[5] = {115,  84,  69,  82, '\0'};
1173
1174      unsigned char
1175        ster_chunk_data[1];
1176
1177      if (verbose)
1178         fprintf(STDERR, "\n stereo mode = %lu\n",
1179           (unsigned long)(user_chunk_data[0] - 1));
1180      ster_chunk_data[0]=(unsigned char)(user_chunk_data[0] - 1);
1181      png_write_chunk(write_ptr, png_sTER, ster_chunk_data, 1);
1182   }
1183   if (user_chunk_data[1] != 0 || user_chunk_data[2] != 0)
1184   {
1185      png_byte png_vpAg[5] = {118, 112,  65, 103, '\0'};
1186
1187      unsigned char
1188        vpag_chunk_data[9];
1189
1190      if (verbose)
1191         fprintf(STDERR, " vpAg = %lu x %lu, units = %lu\n",
1192           (unsigned long)user_chunk_data[1],
1193           (unsigned long)user_chunk_data[2],
1194           (unsigned long)user_chunk_data[3]);
1195      png_save_uint_32(vpag_chunk_data, user_chunk_data[1]);
1196      png_save_uint_32(vpag_chunk_data + 4, user_chunk_data[2]);
1197      vpag_chunk_data[8] = (unsigned char)(user_chunk_data[3] & 0xff);
1198      png_write_chunk(write_ptr, png_vpAg, vpag_chunk_data, 9);
1199   }
1200
1201#endif
1202#endif
1203
1204#ifdef SINGLE_ROWBUF_ALLOC
1205   png_debug(0, "Allocating row buffer...");
1206   row_buf = (png_bytep)png_malloc(read_ptr,
1207      png_get_rowbytes(read_ptr, read_info_ptr));
1208   png_debug1(0, "0x%08lx", (unsigned long)row_buf);
1209#endif /* SINGLE_ROWBUF_ALLOC */
1210   png_debug(0, "Writing row data");
1211
1212#if defined(PNG_READ_INTERLACING_SUPPORTED) || \
1213  defined(PNG_WRITE_INTERLACING_SUPPORTED)
1214   num_pass = png_set_interlace_handling(read_ptr);
1215#  ifdef PNG_WRITE_SUPPORTED
1216   png_set_interlace_handling(write_ptr);
1217#  endif
1218#else
1219   num_pass = 1;
1220#endif
1221
1222#ifdef PNGTEST_TIMING
1223   t_stop = (float)clock();
1224   t_misc += (t_stop - t_start);
1225   t_start = t_stop;
1226#endif
1227   for (pass = 0; pass < num_pass; pass++)
1228   {
1229      png_debug1(0, "Writing row data for pass %d", pass);
1230      for (y = 0; y < height; y++)
1231      {
1232#ifndef SINGLE_ROWBUF_ALLOC
1233         png_debug2(0, "Allocating row buffer (pass %d, y = %ld)...", pass, y);
1234         row_buf = (png_bytep)png_malloc(read_ptr,
1235            png_get_rowbytes(read_ptr, read_info_ptr));
1236         png_debug2(0, "0x%08lx (%ld bytes)", (unsigned long)row_buf,
1237            png_get_rowbytes(read_ptr, read_info_ptr));
1238#endif /* !SINGLE_ROWBUF_ALLOC */
1239         png_read_rows(read_ptr, (png_bytepp)&row_buf, png_bytepp_NULL, 1);
1240
1241#ifdef PNG_WRITE_SUPPORTED
1242#ifdef PNGTEST_TIMING
1243         t_stop = (float)clock();
1244         t_decode += (t_stop - t_start);
1245         t_start = t_stop;
1246#endif
1247         png_write_rows(write_ptr, (png_bytepp)&row_buf, 1);
1248#ifdef PNGTEST_TIMING
1249         t_stop = (float)clock();
1250         t_encode += (t_stop - t_start);
1251         t_start = t_stop;
1252#endif
1253#endif /* PNG_WRITE_SUPPORTED */
1254
1255#ifndef SINGLE_ROWBUF_ALLOC
1256         png_debug2(0, "Freeing row buffer (pass %d, y = %ld)", pass, y);
1257         png_free(read_ptr, row_buf);
1258         row_buf = NULL;
1259#endif /* !SINGLE_ROWBUF_ALLOC */
1260      }
1261   }
1262
1263#ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
1264   png_free_data(read_ptr, read_info_ptr, PNG_FREE_UNKN, -1);
1265#endif
1266#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1267   png_free_data(write_ptr, write_info_ptr, PNG_FREE_UNKN, -1);
1268#endif
1269
1270   png_debug(0, "Reading and writing end_info data");
1271
1272   png_read_end(read_ptr, end_info_ptr);
1273#ifdef PNG_TEXT_SUPPORTED
1274   {
1275      png_textp text_ptr;
1276      int num_text;
1277
1278      if (png_get_text(read_ptr, end_info_ptr, &text_ptr, &num_text) > 0)
1279      {
1280         png_debug1(0, "Handling %d iTXt/tEXt/zTXt chunks", num_text);
1281         png_set_text(write_ptr, write_end_info_ptr, text_ptr, num_text);
1282      }
1283   }
1284#endif
1285#ifdef PNG_tIME_SUPPORTED
1286   {
1287      png_timep mod_time;
1288
1289      if (png_get_tIME(read_ptr, end_info_ptr, &mod_time))
1290      {
1291         png_set_tIME(write_ptr, write_end_info_ptr, mod_time);
1292#ifdef PNG_TIME_RFC1123_SUPPORTED
1293         /* We have to use png_memcpy instead of "=" because the string
1294            pointed to by png_convert_to_rfc1123() gets free'ed before
1295            we use it */
1296         png_memcpy(tIME_string,
1297                    png_convert_to_rfc1123(read_ptr, mod_time),
1298                    png_sizeof(tIME_string));
1299         tIME_string[png_sizeof(tIME_string) - 1] = '\0';
1300         tIME_chunk_present++;
1301#endif /* PNG_TIME_RFC1123_SUPPORTED */
1302      }
1303   }
1304#endif
1305#ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
1306   {
1307      png_unknown_chunkp unknowns;
1308      int num_unknowns;
1309      num_unknowns = (int)png_get_unknown_chunks(read_ptr, end_info_ptr,
1310         &unknowns);
1311      if (num_unknowns)
1312      {
1313         png_size_t i;
1314         png_set_unknown_chunks(write_ptr, write_end_info_ptr, unknowns,
1315           num_unknowns);
1316         /* Copy the locations from the read_info_ptr.  The automatically
1317          * generated locations in write_end_info_ptr are wrong because we
1318          * haven't written the end_info yet.
1319          */
1320         for (i = 0; i < (png_size_t)num_unknowns; i++)
1321           png_set_unknown_chunk_location(write_ptr, write_end_info_ptr, i,
1322             unknowns[i].location);
1323      }
1324   }
1325#endif
1326#ifdef PNG_WRITE_SUPPORTED
1327   png_write_end(write_ptr, write_end_info_ptr);
1328#endif
1329
1330#ifdef PNG_EASY_ACCESS_SUPPORTED
1331   if (verbose)
1332   {
1333      png_uint_32 iwidth, iheight;
1334      iwidth = png_get_image_width(write_ptr, write_info_ptr);
1335      iheight = png_get_image_height(write_ptr, write_info_ptr);
1336      fprintf(STDERR, "\n Image width = %lu, height = %lu\n",
1337         (unsigned long)iwidth, (unsigned long)iheight);
1338   }
1339#endif
1340
1341   png_debug(0, "Destroying data structs");
1342#ifdef SINGLE_ROWBUF_ALLOC
1343   png_debug(1, "destroying row_buf for read_ptr");
1344   png_free(read_ptr, row_buf);
1345   row_buf = NULL;
1346#endif /* SINGLE_ROWBUF_ALLOC */
1347   png_debug(1, "destroying read_ptr, read_info_ptr, end_info_ptr");
1348   png_destroy_read_struct(&read_ptr, &read_info_ptr, &end_info_ptr);
1349#ifdef PNG_WRITE_SUPPORTED
1350   png_debug(1, "destroying write_end_info_ptr");
1351   png_destroy_info_struct(write_ptr, &write_end_info_ptr);
1352   png_debug(1, "destroying write_ptr, write_info_ptr");
1353   png_destroy_write_struct(&write_ptr, &write_info_ptr);
1354#endif
1355   png_debug(0, "Destruction complete.");
1356
1357   FCLOSE(fpin);
1358   FCLOSE(fpout);
1359
1360   png_debug(0, "Opening files for comparison");
1361#ifdef _WIN32_WCE
1362   MultiByteToWideChar(CP_ACP, 0, inname, -1, path, MAX_PATH);
1363   if ((fpin = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING,
1364       0, NULL)) == INVALID_HANDLE_VALUE)
1365#else
1366   if ((fpin = fopen(inname, "rb")) == NULL)
1367#endif
1368   {
1369      fprintf(STDERR, "Could not find file %s\n", inname);
1370      return (1);
1371   }
1372
1373#ifdef _WIN32_WCE
1374   MultiByteToWideChar(CP_ACP, 0, outname, -1, path, MAX_PATH);
1375   if ((fpout = CreateFile(path, GENERIC_READ, 0, NULL, OPEN_EXISTING,
1376       0, NULL)) == INVALID_HANDLE_VALUE)
1377#else
1378   if ((fpout = fopen(outname, "rb")) == NULL)
1379#endif
1380   {
1381      fprintf(STDERR, "Could not find file %s\n", outname);
1382      FCLOSE(fpin);
1383      return (1);
1384   }
1385
1386   for (;;)
1387   {
1388      png_size_t num_in, num_out;
1389
1390         READFILE(fpin, inbuf, 1, num_in);
1391         READFILE(fpout, outbuf, 1, num_out);
1392
1393      if (num_in != num_out)
1394      {
1395         fprintf(STDERR, "\nFiles %s and %s are of a different size\n",
1396                 inname, outname);
1397         if (wrote_question == 0)
1398         {
1399            fprintf(STDERR,
1400         "   Was %s written with the same maximum IDAT chunk size (%d bytes),",
1401              inname, PNG_ZBUF_SIZE);
1402            fprintf(STDERR,
1403              "\n   filtering heuristic (libpng default), compression");
1404            fprintf(STDERR,
1405              " level (zlib default),\n   and zlib version (%s)?\n\n",
1406              ZLIB_VERSION);
1407            wrote_question = 1;
1408         }
1409         FCLOSE(fpin);
1410         FCLOSE(fpout);
1411         return (0);
1412      }
1413
1414      if (!num_in)
1415         break;
1416
1417      if (png_memcmp(inbuf, outbuf, num_in))
1418      {
1419         fprintf(STDERR, "\nFiles %s and %s are different\n", inname, outname);
1420         if (wrote_question == 0)
1421         {
1422            fprintf(STDERR,
1423         "   Was %s written with the same maximum IDAT chunk size (%d bytes),",
1424                 inname, PNG_ZBUF_SIZE);
1425            fprintf(STDERR,
1426              "\n   filtering heuristic (libpng default), compression");
1427            fprintf(STDERR,
1428              " level (zlib default),\n   and zlib version (%s)?\n\n",
1429              ZLIB_VERSION);
1430            wrote_question = 1;
1431         }
1432         FCLOSE(fpin);
1433         FCLOSE(fpout);
1434         return (0);
1435      }
1436   }
1437
1438   FCLOSE(fpin);
1439   FCLOSE(fpout);
1440
1441   return (0);
1442}
1443
1444/* Input and output filenames */
1445#ifdef RISCOS
1446static PNG_CONST char *inname = "pngtest/png";
1447static PNG_CONST char *outname = "pngout/png";
1448#else
1449static PNG_CONST char *inname = "pngtest.png";
1450static PNG_CONST char *outname = "pngout.png";
1451#endif
1452
1453int
1454main(int argc, char *argv[])
1455{
1456   int multiple = 0;
1457   int ierror = 0;
1458
1459   fprintf(STDERR, "\n Testing libpng version %s\n", PNG_LIBPNG_VER_STRING);
1460   fprintf(STDERR, "   with zlib   version %s\n", ZLIB_VERSION);
1461   fprintf(STDERR, "%s", png_get_copyright(NULL));
1462   /* Show the version of libpng used in building the library */
1463   fprintf(STDERR, " library (%lu):%s",
1464      (unsigned long)png_access_version_number(),
1465      png_get_header_version(NULL));
1466   /* Show the version of libpng used in building the application */
1467   fprintf(STDERR, " pngtest (%lu):%s", (unsigned long)PNG_LIBPNG_VER,
1468      PNG_HEADER_VERSION_STRING);
1469   fprintf(STDERR, " sizeof(png_struct)=%ld, sizeof(png_info)=%ld\n",
1470                    (long)png_sizeof(png_struct), (long)png_sizeof(png_info));
1471
1472   /* Do some consistency checking on the memory allocation settings, I'm
1473    * not sure this matters, but it is nice to know, the first of these
1474    * tests should be impossible because of the way the macros are set
1475    * in pngconf.h
1476    */
1477#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
1478      fprintf(STDERR, " NOTE: Zlib compiled for max 64k, libpng not\n");
1479#endif
1480   /* I think the following can happen. */
1481#if !defined(MAXSEG_64K) && defined(PNG_MAX_MALLOC_64K)
1482      fprintf(STDERR, " NOTE: libpng compiled for max 64k, zlib not\n");
1483#endif
1484
1485   if (strcmp(png_libpng_ver, PNG_LIBPNG_VER_STRING))
1486   {
1487      fprintf(STDERR,
1488         "Warning: versions are different between png.h and png.c\n");
1489      fprintf(STDERR, "  png.h version: %s\n", PNG_LIBPNG_VER_STRING);
1490      fprintf(STDERR, "  png.c version: %s\n\n", png_libpng_ver);
1491      ++ierror;
1492   }
1493
1494   if (argc > 1)
1495   {
1496      if (strcmp(argv[1], "-m") == 0)
1497      {
1498         multiple = 1;
1499         status_dots_requested = 0;
1500      }
1501      else if (strcmp(argv[1], "-mv") == 0 ||
1502               strcmp(argv[1], "-vm") == 0 )
1503      {
1504         multiple = 1;
1505         verbose = 1;
1506         status_dots_requested = 1;
1507      }
1508      else if (strcmp(argv[1], "-v") == 0)
1509      {
1510         verbose = 1;
1511         status_dots_requested = 1;
1512         inname = argv[2];
1513      }
1514      else
1515      {
1516         inname = argv[1];
1517         status_dots_requested = 0;
1518      }
1519   }
1520
1521   if (!multiple && argc == 3 + verbose)
1522     outname = argv[2 + verbose];
1523
1524   if ((!multiple && argc > 3 + verbose) || (multiple && argc < 2))
1525   {
1526     fprintf(STDERR,
1527       "usage: %s [infile.png] [outfile.png]\n\t%s -m {infile.png}\n",
1528        argv[0], argv[0]);
1529     fprintf(STDERR,
1530       "  reads/writes one PNG file (without -m) or multiple files (-m)\n");
1531     fprintf(STDERR,
1532       "  with -m %s is used as a temporary file\n", outname);
1533     exit(1);
1534   }
1535
1536   if (multiple)
1537   {
1538      int i;
1539#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1540      int allocation_now = current_allocation;
1541#endif
1542      for (i=2; i<argc; ++i)
1543      {
1544         int kerror;
1545         fprintf(STDERR, "\n Testing %s:", argv[i]);
1546         kerror = test_one_file(argv[i], outname);
1547         if (kerror == 0)
1548         {
1549#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1550            int k;
1551#endif
1552#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1553            fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1554               (unsigned long)zero_samples);
1555#else
1556            fprintf(STDERR, " PASS\n");
1557#endif
1558#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1559            for (k = 0; k<256; k++)
1560               if (filters_used[k])
1561                  fprintf(STDERR, " Filter %d was used %lu times\n",
1562                     k, (unsigned long)filters_used[k]);
1563#endif
1564#ifdef PNG_TIME_RFC1123_SUPPORTED
1565         if (tIME_chunk_present != 0)
1566            fprintf(STDERR, " tIME = %s\n", tIME_string);
1567         tIME_chunk_present = 0;
1568#endif /* PNG_TIME_RFC1123_SUPPORTED */
1569         }
1570         else
1571         {
1572            fprintf(STDERR, " FAIL\n");
1573            ierror += kerror;
1574         }
1575#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1576         if (allocation_now != current_allocation)
1577            fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1578               current_allocation - allocation_now);
1579         if (current_allocation != 0)
1580         {
1581            memory_infop pinfo = pinformation;
1582
1583            fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1584               current_allocation);
1585            while (pinfo != NULL)
1586            {
1587               fprintf(STDERR, " %lu bytes at %x\n",
1588                 (unsigned long)pinfo->size,
1589                 (unsigned int) pinfo->pointer);
1590               pinfo = pinfo->next;
1591            }
1592         }
1593#endif
1594      }
1595#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1596         fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1597            current_allocation);
1598         fprintf(STDERR, " Maximum memory allocation: %10d bytes\n",
1599            maximum_allocation);
1600         fprintf(STDERR, " Total   memory allocation: %10d bytes\n",
1601            total_allocation);
1602         fprintf(STDERR, "     Number of allocations: %10d\n",
1603            num_allocations);
1604#endif
1605   }
1606   else
1607   {
1608      int i;
1609      for (i = 0; i<3; ++i)
1610      {
1611         int kerror;
1612#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1613         int allocation_now = current_allocation;
1614#endif
1615         if (i == 1) status_dots_requested = 1;
1616         else if (verbose == 0)status_dots_requested = 0;
1617         if (i == 0 || verbose == 1 || ierror != 0)
1618            fprintf(STDERR, "\n Testing %s:", inname);
1619         kerror = test_one_file(inname, outname);
1620         if (kerror == 0)
1621         {
1622            if (verbose == 1 || i == 2)
1623            {
1624#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1625                int k;
1626#endif
1627#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
1628                fprintf(STDERR, "\n PASS (%lu zero samples)\n",
1629                   (unsigned long)zero_samples);
1630#else
1631                fprintf(STDERR, " PASS\n");
1632#endif
1633#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
1634                for (k = 0; k<256; k++)
1635                   if (filters_used[k])
1636                      fprintf(STDERR, " Filter %d was used %lu times\n",
1637                         k, (unsigned long)filters_used[k]);
1638#endif
1639#ifdef PNG_TIME_RFC1123_SUPPORTED
1640             if (tIME_chunk_present != 0)
1641                fprintf(STDERR, " tIME = %s\n", tIME_string);
1642#endif /* PNG_TIME_RFC1123_SUPPORTED */
1643            }
1644         }
1645         else
1646         {
1647            if (verbose == 0 && i != 2)
1648               fprintf(STDERR, "\n Testing %s:", inname);
1649            fprintf(STDERR, " FAIL\n");
1650            ierror += kerror;
1651         }
1652#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1653         if (allocation_now != current_allocation)
1654             fprintf(STDERR, "MEMORY ERROR: %d bytes lost\n",
1655               current_allocation - allocation_now);
1656         if (current_allocation != 0)
1657         {
1658             memory_infop pinfo = pinformation;
1659
1660             fprintf(STDERR, "MEMORY ERROR: %d bytes still allocated\n",
1661                current_allocation);
1662             while (pinfo != NULL)
1663             {
1664                fprintf(STDERR, " %lu bytes at %x\n",
1665                   (unsigned long)pinfo->size, (unsigned int)pinfo->pointer);
1666                pinfo = pinfo->next;
1667             }
1668          }
1669#endif
1670       }
1671#if defined(PNG_USER_MEM_SUPPORTED) && PNG_DEBUG
1672       fprintf(STDERR, " Current memory allocation: %10d bytes\n",
1673          current_all

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