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

http://ftk.googlecode.com/
C | 1226 lines | 1017 code | 148 blank | 61 comment | 242 complexity | 6a6bb67d8bd5f832d2f80e33c7884ebf MD5 | raw file
   1
   2/* pngset.c - storage of image information into info struct
   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 * The functions here are used during reads to store data from the file
  14 * into the info struct, and during writes to store application data
  15 * into the info struct for writing into the file.  This abstracts the
  16 * info struct and allows us to change the structure in the future.
  17 */
  18
  19#define PNG_INTERNAL
  20#define PNG_NO_PEDANTIC_WARNINGS
  21#include "png.h"
  22#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
  23
  24#ifdef PNG_bKGD_SUPPORTED
  25void PNGAPI
  26png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
  27{
  28   png_debug1(1, "in %s storage function", "bKGD");
  29
  30   if (png_ptr == NULL || info_ptr == NULL)
  31      return;
  32
  33   png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
  34   info_ptr->valid |= PNG_INFO_bKGD;
  35}
  36#endif
  37
  38#ifdef PNG_cHRM_SUPPORTED
  39#ifdef PNG_FLOATING_POINT_SUPPORTED
  40void PNGAPI
  41png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
  42   double white_x, double white_y, double red_x, double red_y,
  43   double green_x, double green_y, double blue_x, double blue_y)
  44{
  45   png_debug1(1, "in %s storage function", "cHRM");
  46
  47   if (png_ptr == NULL || info_ptr == NULL)
  48      return;
  49
  50   info_ptr->x_white = (float)white_x;
  51   info_ptr->y_white = (float)white_y;
  52   info_ptr->x_red   = (float)red_x;
  53   info_ptr->y_red   = (float)red_y;
  54   info_ptr->x_green = (float)green_x;
  55   info_ptr->y_green = (float)green_y;
  56   info_ptr->x_blue  = (float)blue_x;
  57   info_ptr->y_blue  = (float)blue_y;
  58#ifdef PNG_FIXED_POINT_SUPPORTED
  59   info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
  60   info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
  61   info_ptr->int_x_red   = (png_fixed_point)(  red_x*100000.+0.5);
  62   info_ptr->int_y_red   = (png_fixed_point)(  red_y*100000.+0.5);
  63   info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
  64   info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
  65   info_ptr->int_x_blue  = (png_fixed_point)( blue_x*100000.+0.5);
  66   info_ptr->int_y_blue  = (png_fixed_point)( blue_y*100000.+0.5);
  67#endif
  68   info_ptr->valid |= PNG_INFO_cHRM;
  69}
  70#endif /* PNG_FLOATING_POINT_SUPPORTED */
  71
  72#ifdef PNG_FIXED_POINT_SUPPORTED
  73void PNGAPI
  74png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
  75   png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
  76   png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
  77   png_fixed_point blue_x, png_fixed_point blue_y)
  78{
  79   png_debug1(1, "in %s storage function", "cHRM fixed");
  80
  81   if (png_ptr == NULL || info_ptr == NULL)
  82      return;
  83
  84#ifdef PNG_CHECK_cHRM_SUPPORTED
  85   if (png_check_cHRM_fixed(png_ptr,
  86      white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y))
  87#endif
  88   {
  89      info_ptr->int_x_white = white_x;
  90      info_ptr->int_y_white = white_y;
  91      info_ptr->int_x_red   = red_x;
  92      info_ptr->int_y_red   = red_y;
  93      info_ptr->int_x_green = green_x;
  94      info_ptr->int_y_green = green_y;
  95      info_ptr->int_x_blue  = blue_x;
  96      info_ptr->int_y_blue  = blue_y;
  97#ifdef  PNG_FLOATING_POINT_SUPPORTED
  98      info_ptr->x_white = (float)(white_x/100000.);
  99      info_ptr->y_white = (float)(white_y/100000.);
 100      info_ptr->x_red   = (float)(  red_x/100000.);
 101      info_ptr->y_red   = (float)(  red_y/100000.);
 102      info_ptr->x_green = (float)(green_x/100000.);
 103      info_ptr->y_green = (float)(green_y/100000.);
 104      info_ptr->x_blue  = (float)( blue_x/100000.);
 105      info_ptr->y_blue  = (float)( blue_y/100000.);
 106#endif
 107      info_ptr->valid |= PNG_INFO_cHRM;
 108   }
 109}
 110#endif /* PNG_FIXED_POINT_SUPPORTED */
 111#endif /* PNG_cHRM_SUPPORTED */
 112
 113#ifdef PNG_gAMA_SUPPORTED
 114#ifdef PNG_FLOATING_POINT_SUPPORTED
 115void PNGAPI
 116png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
 117{
 118   double png_gamma;
 119
 120   png_debug1(1, "in %s storage function", "gAMA");
 121
 122   if (png_ptr == NULL || info_ptr == NULL)
 123      return;
 124
 125   /* Check for overflow */
 126   if (file_gamma > 21474.83)
 127   {
 128      png_warning(png_ptr, "Limiting gamma to 21474.83");
 129      png_gamma=21474.83;
 130   }
 131   else
 132      png_gamma = file_gamma;
 133   info_ptr->gamma = (float)png_gamma;
 134#ifdef PNG_FIXED_POINT_SUPPORTED
 135   info_ptr->int_gamma = (int)(png_gamma*100000.+.5);
 136#endif
 137   info_ptr->valid |= PNG_INFO_gAMA;
 138   if (png_gamma == 0.0)
 139      png_warning(png_ptr, "Setting gamma=0");
 140}
 141#endif
 142void PNGAPI
 143png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
 144   int_gamma)
 145{
 146   png_fixed_point png_gamma;
 147
 148   png_debug1(1, "in %s storage function", "gAMA");
 149
 150   if (png_ptr == NULL || info_ptr == NULL)
 151      return;
 152
 153   if (int_gamma > (png_fixed_point)PNG_UINT_31_MAX)
 154   {
 155      png_warning(png_ptr, "Limiting gamma to 21474.83");
 156      png_gamma=PNG_UINT_31_MAX;
 157   }
 158   else
 159   {
 160      if (int_gamma < 0)
 161      {
 162         png_warning(png_ptr, "Setting negative gamma to zero");
 163         png_gamma = 0;
 164      }
 165      else
 166         png_gamma = int_gamma;
 167   }
 168#ifdef PNG_FLOATING_POINT_SUPPORTED
 169   info_ptr->gamma = (float)(png_gamma/100000.);
 170#endif
 171#ifdef PNG_FIXED_POINT_SUPPORTED
 172   info_ptr->int_gamma = png_gamma;
 173#endif
 174   info_ptr->valid |= PNG_INFO_gAMA;
 175   if (png_gamma == 0)
 176      png_warning(png_ptr, "Setting gamma=0");
 177}
 178#endif
 179
 180#ifdef PNG_hIST_SUPPORTED
 181void PNGAPI
 182png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
 183{
 184   int i;
 185
 186   png_debug1(1, "in %s storage function", "hIST");
 187
 188   if (png_ptr == NULL || info_ptr == NULL)
 189      return;
 190
 191   if (info_ptr->num_palette == 0 || info_ptr->num_palette
 192       > PNG_MAX_PALETTE_LENGTH)
 193   {
 194      png_warning(png_ptr,
 195         "Invalid palette size, hIST allocation skipped.");
 196      return;
 197   }
 198
 199#ifdef PNG_FREE_ME_SUPPORTED
 200   png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
 201#endif
 202   /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in
 203    * version 1.2.1
 204    */
 205   png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
 206      (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)));
 207   if (png_ptr->hist == NULL)
 208   {
 209      png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
 210      return;
 211   }
 212
 213   for (i = 0; i < info_ptr->num_palette; i++)
 214      png_ptr->hist[i] = hist[i];
 215   info_ptr->hist = png_ptr->hist;
 216   info_ptr->valid |= PNG_INFO_hIST;
 217
 218#ifdef PNG_FREE_ME_SUPPORTED
 219   info_ptr->free_me |= PNG_FREE_HIST;
 220#else
 221   png_ptr->flags |= PNG_FLAG_FREE_HIST;
 222#endif
 223}
 224#endif
 225
 226void PNGAPI
 227png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
 228   png_uint_32 width, png_uint_32 height, int bit_depth,
 229   int color_type, int interlace_type, int compression_type,
 230   int filter_type)
 231{
 232   png_debug1(1, "in %s storage function", "IHDR");
 233
 234   if (png_ptr == NULL || info_ptr == NULL)
 235      return;
 236
 237   info_ptr->width = width;
 238   info_ptr->height = height;
 239   info_ptr->bit_depth = (png_byte)bit_depth;
 240   info_ptr->color_type = (png_byte)color_type;
 241   info_ptr->compression_type = (png_byte)compression_type;
 242   info_ptr->filter_type = (png_byte)filter_type;
 243   info_ptr->interlace_type = (png_byte)interlace_type;
 244
 245   png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height,
 246       info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type,
 247       info_ptr->compression_type, info_ptr->filter_type);
 248
 249   if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
 250      info_ptr->channels = 1;
 251   else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
 252      info_ptr->channels = 3;
 253   else
 254      info_ptr->channels = 1;
 255   if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
 256      info_ptr->channels++;
 257   info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
 258
 259   /* Check for potential overflow */
 260   if (width > (PNG_UINT_32_MAX
 261                 >> 3)      /* 8-byte RGBA pixels */
 262                 - 64       /* bigrowbuf hack */
 263                 - 1        /* filter byte */
 264                 - 7*8      /* rounding of width to multiple of 8 pixels */
 265                 - 8)       /* extra max_pixel_depth pad */
 266      info_ptr->rowbytes = (png_size_t)0;
 267   else
 268      info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
 269}
 270
 271#ifdef PNG_oFFs_SUPPORTED
 272void PNGAPI
 273png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
 274   png_int_32 offset_x, png_int_32 offset_y, int unit_type)
 275{
 276   png_debug1(1, "in %s storage function", "oFFs");
 277
 278   if (png_ptr == NULL || info_ptr == NULL)
 279      return;
 280
 281   info_ptr->x_offset = offset_x;
 282   info_ptr->y_offset = offset_y;
 283   info_ptr->offset_unit_type = (png_byte)unit_type;
 284   info_ptr->valid |= PNG_INFO_oFFs;
 285}
 286#endif
 287
 288#ifdef PNG_pCAL_SUPPORTED
 289void PNGAPI
 290png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
 291   png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
 292   png_charp units, png_charpp params)
 293{
 294   png_uint_32 length;
 295   int i;
 296
 297   png_debug1(1, "in %s storage function", "pCAL");
 298
 299   if (png_ptr == NULL || info_ptr == NULL)
 300      return;
 301
 302   length = png_strlen(purpose) + 1;
 303   png_debug1(3, "allocating purpose for info (%lu bytes)",
 304     (unsigned long)length);
 305   info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
 306   if (info_ptr->pcal_purpose == NULL)
 307   {
 308      png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
 309      return;
 310   }
 311   png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
 312
 313   png_debug(3, "storing X0, X1, type, and nparams in info");
 314   info_ptr->pcal_X0 = X0;
 315   info_ptr->pcal_X1 = X1;
 316   info_ptr->pcal_type = (png_byte)type;
 317   info_ptr->pcal_nparams = (png_byte)nparams;
 318
 319   length = png_strlen(units) + 1;
 320   png_debug1(3, "allocating units for info (%lu bytes)",
 321     (unsigned long)length);
 322   info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
 323   if (info_ptr->pcal_units == NULL)
 324   {
 325      png_warning(png_ptr, "Insufficient memory for pCAL units.");
 326      return;
 327   }
 328   png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
 329
 330   info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
 331      (png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
 332   if (info_ptr->pcal_params == NULL)
 333   {
 334      png_warning(png_ptr, "Insufficient memory for pCAL params.");
 335      return;
 336   }
 337
 338   png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp));
 339
 340   for (i = 0; i < nparams; i++)
 341   {
 342      length = png_strlen(params[i]) + 1;
 343      png_debug2(3, "allocating parameter %d for info (%lu bytes)", i,
 344        (unsigned long)length);
 345      info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
 346      if (info_ptr->pcal_params[i] == NULL)
 347      {
 348         png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
 349         return;
 350      }
 351      png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
 352   }
 353
 354   info_ptr->valid |= PNG_INFO_pCAL;
 355#ifdef PNG_FREE_ME_SUPPORTED
 356   info_ptr->free_me |= PNG_FREE_PCAL;
 357#endif
 358}
 359#endif
 360
 361#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
 362#ifdef PNG_FLOATING_POINT_SUPPORTED
 363void PNGAPI
 364png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
 365             int unit, double width, double height)
 366{
 367   png_debug1(1, "in %s storage function", "sCAL");
 368
 369   if (png_ptr == NULL || info_ptr == NULL)
 370      return;
 371
 372   info_ptr->scal_unit = (png_byte)unit;
 373   info_ptr->scal_pixel_width = width;
 374   info_ptr->scal_pixel_height = height;
 375
 376   info_ptr->valid |= PNG_INFO_sCAL;
 377}
 378#else
 379#ifdef PNG_FIXED_POINT_SUPPORTED
 380void PNGAPI
 381png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
 382             int unit, png_charp swidth, png_charp sheight)
 383{
 384   png_uint_32 length;
 385
 386   png_debug1(1, "in %s storage function", "sCAL");
 387
 388   if (png_ptr == NULL || info_ptr == NULL)
 389      return;
 390
 391   info_ptr->scal_unit = (png_byte)unit;
 392
 393   length = png_strlen(swidth) + 1;
 394   png_debug1(3, "allocating unit for info (%u bytes)",
 395      (unsigned int)length);
 396   info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
 397   if (info_ptr->scal_s_width == NULL)
 398   {
 399      png_warning(png_ptr,
 400         "Memory allocation failed while processing sCAL.");
 401      return;
 402   }
 403   png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
 404
 405   length = png_strlen(sheight) + 1;
 406   png_debug1(3, "allocating unit for info (%u bytes)",
 407      (unsigned int)length);
 408   info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
 409   if (info_ptr->scal_s_height == NULL)
 410   {
 411      png_free (png_ptr, info_ptr->scal_s_width);
 412      info_ptr->scal_s_width = NULL;
 413      png_warning(png_ptr,
 414         "Memory allocation failed while processing sCAL.");
 415      return;
 416   }
 417   png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
 418   info_ptr->valid |= PNG_INFO_sCAL;
 419#ifdef PNG_FREE_ME_SUPPORTED
 420   info_ptr->free_me |= PNG_FREE_SCAL;
 421#endif
 422}
 423#endif
 424#endif
 425#endif
 426
 427#ifdef PNG_pHYs_SUPPORTED
 428void PNGAPI
 429png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
 430   png_uint_32 res_x, png_uint_32 res_y, int unit_type)
 431{
 432   png_debug1(1, "in %s storage function", "pHYs");
 433
 434   if (png_ptr == NULL || info_ptr == NULL)
 435      return;
 436
 437   info_ptr->x_pixels_per_unit = res_x;
 438   info_ptr->y_pixels_per_unit = res_y;
 439   info_ptr->phys_unit_type = (png_byte)unit_type;
 440   info_ptr->valid |= PNG_INFO_pHYs;
 441}
 442#endif
 443
 444void PNGAPI
 445png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
 446   png_colorp palette, int num_palette)
 447{
 448
 449   png_debug1(1, "in %s storage function", "PLTE");
 450
 451   if (png_ptr == NULL || info_ptr == NULL)
 452      return;
 453
 454   if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
 455   {
 456      if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
 457         png_error(png_ptr, "Invalid palette length");
 458      else
 459      {
 460         png_warning(png_ptr, "Invalid palette length");
 461         return;
 462      }
 463   }
 464
 465   /* It may not actually be necessary to set png_ptr->palette here;
 466    * we do it for backward compatibility with the way the png_handle_tRNS
 467    * function used to do the allocation.
 468    */
 469#ifdef PNG_FREE_ME_SUPPORTED
 470   png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
 471#endif
 472
 473   /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
 474    * of num_palette entries, in case of an invalid PNG file that has
 475    * too-large sample values.
 476    */
 477   png_ptr->palette = (png_colorp)png_calloc(png_ptr,
 478      PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
 479   png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
 480   info_ptr->palette = png_ptr->palette;
 481   info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
 482
 483#ifdef PNG_FREE_ME_SUPPORTED
 484   info_ptr->free_me |= PNG_FREE_PLTE;
 485#else
 486   png_ptr->flags |= PNG_FLAG_FREE_PLTE;
 487#endif
 488
 489   info_ptr->valid |= PNG_INFO_PLTE;
 490}
 491
 492#ifdef PNG_sBIT_SUPPORTED
 493void PNGAPI
 494png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
 495   png_color_8p sig_bit)
 496{
 497   png_debug1(1, "in %s storage function", "sBIT");
 498
 499   if (png_ptr == NULL || info_ptr == NULL)
 500      return;
 501
 502   png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
 503   info_ptr->valid |= PNG_INFO_sBIT;
 504}
 505#endif
 506
 507#ifdef PNG_sRGB_SUPPORTED
 508void PNGAPI
 509png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
 510{
 511   png_debug1(1, "in %s storage function", "sRGB");
 512
 513   if (png_ptr == NULL || info_ptr == NULL)
 514      return;
 515
 516   info_ptr->srgb_intent = (png_byte)intent;
 517   info_ptr->valid |= PNG_INFO_sRGB;
 518}
 519
 520void PNGAPI
 521png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
 522   int intent)
 523{
 524#ifdef PNG_gAMA_SUPPORTED
 525#ifdef PNG_FLOATING_POINT_SUPPORTED
 526   float file_gamma;
 527#endif
 528#ifdef PNG_FIXED_POINT_SUPPORTED
 529   png_fixed_point int_file_gamma;
 530#endif
 531#endif
 532#ifdef PNG_cHRM_SUPPORTED
 533#ifdef PNG_FLOATING_POINT_SUPPORTED
 534   float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
 535#endif
 536   png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
 537      int_green_y, int_blue_x, int_blue_y;
 538#endif
 539   png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM");
 540
 541   if (png_ptr == NULL || info_ptr == NULL)
 542      return;
 543
 544   png_set_sRGB(png_ptr, info_ptr, intent);
 545
 546#ifdef PNG_gAMA_SUPPORTED
 547#ifdef PNG_FLOATING_POINT_SUPPORTED
 548   file_gamma = (float).45455;
 549   png_set_gAMA(png_ptr, info_ptr, file_gamma);
 550#endif
 551#ifdef PNG_FIXED_POINT_SUPPORTED
 552   int_file_gamma = 45455L;
 553   png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
 554#endif
 555#endif
 556
 557#ifdef PNG_cHRM_SUPPORTED
 558   int_white_x = 31270L;
 559   int_white_y = 32900L;
 560   int_red_x   = 64000L;
 561   int_red_y   = 33000L;
 562   int_green_x = 30000L;
 563   int_green_y = 60000L;
 564   int_blue_x  = 15000L;
 565   int_blue_y  =  6000L;
 566
 567#ifdef PNG_FLOATING_POINT_SUPPORTED
 568   white_x = (float).3127;
 569   white_y = (float).3290;
 570   red_x   = (float).64;
 571   red_y   = (float).33;
 572   green_x = (float).30;
 573   green_y = (float).60;
 574   blue_x  = (float).15;
 575   blue_y  = (float).06;
 576#endif
 577
 578#ifdef PNG_FIXED_POINT_SUPPORTED
 579   png_set_cHRM_fixed(png_ptr, info_ptr,
 580       int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
 581       int_green_y, int_blue_x, int_blue_y);
 582#endif
 583#ifdef PNG_FLOATING_POINT_SUPPORTED
 584   png_set_cHRM(png_ptr, info_ptr,
 585       white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
 586#endif
 587#endif /* cHRM */
 588}
 589#endif /* sRGB */
 590
 591
 592#ifdef PNG_iCCP_SUPPORTED
 593void PNGAPI
 594png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
 595             png_charp name, int compression_type,
 596             png_charp profile, png_uint_32 proflen)
 597{
 598   png_charp new_iccp_name;
 599   png_charp new_iccp_profile;
 600   png_uint_32 length;
 601
 602   png_debug1(1, "in %s storage function", "iCCP");
 603
 604   if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
 605      return;
 606
 607   length = png_strlen(name)+1;
 608   new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
 609   if (new_iccp_name == NULL)
 610   {
 611        png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
 612      return;
 613   }
 614   png_memcpy(new_iccp_name, name, length);
 615   new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
 616   if (new_iccp_profile == NULL)
 617   {
 618      png_free (png_ptr, new_iccp_name);
 619      png_warning(png_ptr,
 620          "Insufficient memory to process iCCP profile.");
 621      return;
 622   }
 623   png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
 624
 625   png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
 626
 627   info_ptr->iccp_proflen = proflen;
 628   info_ptr->iccp_name = new_iccp_name;
 629   info_ptr->iccp_profile = new_iccp_profile;
 630   /* Compression is always zero but is here so the API and info structure
 631    * does not have to change if we introduce multiple compression types
 632    */
 633   info_ptr->iccp_compression = (png_byte)compression_type;
 634#ifdef PNG_FREE_ME_SUPPORTED
 635   info_ptr->free_me |= PNG_FREE_ICCP;
 636#endif
 637   info_ptr->valid |= PNG_INFO_iCCP;
 638}
 639#endif
 640
 641#ifdef PNG_TEXT_SUPPORTED
 642void PNGAPI
 643png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
 644             int num_text)
 645{
 646   int ret;
 647   ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
 648   if (ret)
 649      png_error(png_ptr, "Insufficient memory to store text");
 650}
 651
 652int /* PRIVATE */
 653png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
 654               int num_text)
 655{
 656   int i;
 657
 658   png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
 659      png_ptr->chunk_name[0] == '\0') ?
 660      "text" : (png_const_charp)png_ptr->chunk_name));
 661
 662   if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
 663      return(0);
 664
 665   /* Make sure we have enough space in the "text" array in info_struct
 666    * to hold all of the incoming text_ptr objects.
 667    */
 668   if (info_ptr->num_text + num_text > info_ptr->max_text)
 669   {
 670      if (info_ptr->text != NULL)
 671      {
 672         png_textp old_text;
 673         int old_max;
 674
 675         old_max = info_ptr->max_text;
 676         info_ptr->max_text = info_ptr->num_text + num_text + 8;
 677         old_text = info_ptr->text;
 678         info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
 679            (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
 680         if (info_ptr->text == NULL)
 681         {
 682            png_free(png_ptr, old_text);
 683            return(1);
 684         }
 685         png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
 686            png_sizeof(png_text)));
 687         png_free(png_ptr, old_text);
 688      }
 689      else
 690      {
 691         info_ptr->max_text = num_text + 8;
 692         info_ptr->num_text = 0;
 693         info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
 694            (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
 695         if (info_ptr->text == NULL)
 696            return(1);
 697#ifdef PNG_FREE_ME_SUPPORTED
 698         info_ptr->free_me |= PNG_FREE_TEXT;
 699#endif
 700      }
 701      png_debug1(3, "allocated %d entries for info_ptr->text",
 702         info_ptr->max_text);
 703   }
 704   for (i = 0; i < num_text; i++)
 705   {
 706      png_size_t text_length, key_len;
 707      png_size_t lang_len, lang_key_len;
 708      png_textp textp = &(info_ptr->text[info_ptr->num_text]);
 709
 710      if (text_ptr[i].key == NULL)
 711          continue;
 712
 713      key_len = png_strlen(text_ptr[i].key);
 714
 715      if (text_ptr[i].compression <= 0)
 716      {
 717         lang_len = 0;
 718         lang_key_len = 0;
 719      }
 720
 721      else
 722#ifdef PNG_iTXt_SUPPORTED
 723      {
 724         /* Set iTXt data */
 725
 726         if (text_ptr[i].lang != NULL)
 727            lang_len = png_strlen(text_ptr[i].lang);
 728         else
 729            lang_len = 0;
 730         if (text_ptr[i].lang_key != NULL)
 731            lang_key_len = png_strlen(text_ptr[i].lang_key);
 732         else
 733            lang_key_len = 0;
 734      }
 735#else /* PNG_iTXt_SUPPORTED */
 736      {
 737         png_warning(png_ptr, "iTXt chunk not supported.");
 738         continue;
 739      }
 740#endif
 741
 742      if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
 743      {
 744         text_length = 0;
 745#ifdef PNG_iTXt_SUPPORTED
 746         if (text_ptr[i].compression > 0)
 747            textp->compression = PNG_ITXT_COMPRESSION_NONE;
 748         else
 749#endif
 750            textp->compression = PNG_TEXT_COMPRESSION_NONE;
 751      }
 752
 753      else
 754      {
 755         text_length = png_strlen(text_ptr[i].text);
 756         textp->compression = text_ptr[i].compression;
 757      }
 758
 759      textp->key = (png_charp)png_malloc_warn(png_ptr,
 760         (png_uint_32)
 761         (key_len + text_length + lang_len + lang_key_len + 4));
 762      if (textp->key == NULL)
 763         return(1);
 764      png_debug2(2, "Allocated %lu bytes at %x in png_set_text",
 765                 (png_uint_32)
 766                 (key_len + lang_len + lang_key_len + text_length + 4),
 767                 (int)textp->key);
 768
 769      png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
 770      *(textp->key + key_len) = '\0';
 771#ifdef PNG_iTXt_SUPPORTED
 772      if (text_ptr[i].compression > 0)
 773      {
 774         textp->lang = textp->key + key_len + 1;
 775         png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
 776         *(textp->lang + lang_len) = '\0';
 777         textp->lang_key = textp->lang + lang_len + 1;
 778         png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
 779         *(textp->lang_key + lang_key_len) = '\0';
 780         textp->text = textp->lang_key + lang_key_len + 1;
 781      }
 782      else
 783#endif
 784      {
 785#ifdef PNG_iTXt_SUPPORTED
 786         textp->lang=NULL;
 787         textp->lang_key=NULL;
 788#endif
 789         textp->text = textp->key + key_len + 1;
 790      }
 791      if (text_length)
 792         png_memcpy(textp->text, text_ptr[i].text,
 793            (png_size_t)(text_length));
 794      *(textp->text + text_length) = '\0';
 795
 796#ifdef PNG_iTXt_SUPPORTED
 797      if (textp->compression > 0)
 798      {
 799         textp->text_length = 0;
 800         textp->itxt_length = text_length;
 801      }
 802      else
 803#endif
 804
 805      {
 806         textp->text_length = text_length;
 807#ifdef PNG_iTXt_SUPPORTED
 808         textp->itxt_length = 0;
 809#endif
 810      }
 811      info_ptr->num_text++;
 812      png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
 813   }
 814   return(0);
 815}
 816#endif
 817
 818#ifdef PNG_tIME_SUPPORTED
 819void PNGAPI
 820png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
 821{
 822   png_debug1(1, "in %s storage function", "tIME");
 823
 824   if (png_ptr == NULL || info_ptr == NULL ||
 825       (png_ptr->mode & PNG_WROTE_tIME))
 826      return;
 827
 828   png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
 829   info_ptr->valid |= PNG_INFO_tIME;
 830}
 831#endif
 832
 833#ifdef PNG_tRNS_SUPPORTED
 834void PNGAPI
 835png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
 836   png_bytep trans, int num_trans, png_color_16p trans_values)
 837{
 838   png_debug1(1, "in %s storage function", "tRNS");
 839
 840   if (png_ptr == NULL || info_ptr == NULL)
 841      return;
 842
 843   if (trans != NULL)
 844   {
 845       /* It may not actually be necessary to set png_ptr->trans here;
 846        * we do it for backward compatibility with the way the png_handle_tRNS
 847        * function used to do the allocation.
 848        */
 849
 850#ifdef PNG_FREE_ME_SUPPORTED
 851       png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
 852#endif
 853
 854       /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
 855       png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
 856           (png_uint_32)PNG_MAX_PALETTE_LENGTH);
 857       if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
 858          png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
 859   }
 860
 861   if (trans_values != NULL)
 862   {
 863      int sample_max = (1 << info_ptr->bit_depth);
 864      if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
 865          (int)trans_values->gray > sample_max) ||
 866          (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
 867          ((int)trans_values->red > sample_max ||
 868          (int)trans_values->green > sample_max ||
 869          (int)trans_values->blue > sample_max)))
 870         png_warning(png_ptr,
 871            "tRNS chunk has out-of-range samples for bit_depth");
 872      png_memcpy(&(info_ptr->trans_values), trans_values,
 873         png_sizeof(png_color_16));
 874      if (num_trans == 0)
 875         num_trans = 1;
 876   }
 877
 878   info_ptr->num_trans = (png_uint_16)num_trans;
 879   if (num_trans != 0)
 880   {
 881      info_ptr->valid |= PNG_INFO_tRNS;
 882#ifdef PNG_FREE_ME_SUPPORTED
 883      info_ptr->free_me |= PNG_FREE_TRNS;
 884#else
 885      png_ptr->flags |= PNG_FLAG_FREE_TRNS;
 886#endif
 887   }
 888}
 889#endif
 890
 891#ifdef PNG_sPLT_SUPPORTED
 892void PNGAPI
 893png_set_sPLT(png_structp png_ptr,
 894             png_infop info_ptr, png_sPLT_tp entries, int nentries)
 895/*
 896 *  entries        - array of png_sPLT_t structures
 897 *                   to be added to the list of palettes
 898 *                   in the info structure.
 899 *  nentries       - number of palette structures to be
 900 *                   added.
 901 */
 902{
 903   png_sPLT_tp np;
 904   int i;
 905
 906   if (png_ptr == NULL || info_ptr == NULL)
 907      return;
 908
 909   np = (png_sPLT_tp)png_malloc_warn(png_ptr,
 910       (info_ptr->splt_palettes_num + nentries) *
 911        (png_uint_32)png_sizeof(png_sPLT_t));
 912   if (np == NULL)
 913   {
 914      png_warning(png_ptr, "No memory for sPLT palettes.");
 915      return;
 916   }
 917
 918   png_memcpy(np, info_ptr->splt_palettes,
 919       info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
 920   png_free(png_ptr, info_ptr->splt_palettes);
 921   info_ptr->splt_palettes=NULL;
 922
 923   for (i = 0; i < nentries; i++)
 924   {
 925      png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
 926      png_sPLT_tp from = entries + i;
 927      png_uint_32 length;
 928
 929      length = png_strlen(from->name) + 1;
 930      to->name = (png_charp)png_malloc_warn(png_ptr, length);
 931      if (to->name == NULL)
 932      {
 933         png_warning(png_ptr,
 934           "Out of memory while processing sPLT chunk");
 935         continue;
 936      }
 937      png_memcpy(to->name, from->name, length);
 938      to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
 939          (png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry)));
 940      if (to->entries == NULL)
 941      {
 942         png_warning(png_ptr,
 943           "Out of memory while processing sPLT chunk");
 944         png_free(png_ptr, to->name);
 945         to->name = NULL;
 946         continue;
 947      }
 948      png_memcpy(to->entries, from->entries,
 949          from->nentries * png_sizeof(png_sPLT_entry));
 950      to->nentries = from->nentries;
 951      to->depth = from->depth;
 952   }
 953
 954   info_ptr->splt_palettes = np;
 955   info_ptr->splt_palettes_num += nentries;
 956   info_ptr->valid |= PNG_INFO_sPLT;
 957#ifdef PNG_FREE_ME_SUPPORTED
 958   info_ptr->free_me |= PNG_FREE_SPLT;
 959#endif
 960}
 961#endif /* PNG_sPLT_SUPPORTED */
 962
 963#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
 964void PNGAPI
 965png_set_unknown_chunks(png_structp png_ptr,
 966   png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
 967{
 968   png_unknown_chunkp np;
 969   int i;
 970
 971   if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
 972      return;
 973
 974   np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
 975       (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) *
 976       png_sizeof(png_unknown_chunk)));
 977   if (np == NULL)
 978   {
 979      png_warning(png_ptr,
 980          "Out of memory while processing unknown chunk.");
 981      return;
 982   }
 983
 984   png_memcpy(np, info_ptr->unknown_chunks,
 985       info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
 986   png_free(png_ptr, info_ptr->unknown_chunks);
 987   info_ptr->unknown_chunks = NULL;
 988
 989   for (i = 0; i < num_unknowns; i++)
 990   {
 991      png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
 992      png_unknown_chunkp from = unknowns + i;
 993
 994      png_memcpy((png_charp)to->name, (png_charp)from->name,
 995          png_sizeof(from->name));
 996      to->name[png_sizeof(to->name)-1] = '\0';
 997      to->size = from->size;
 998      /* Note our location in the read or write sequence */
 999      to->location = (png_byte)(png_ptr->mode & 0xff);
1000
1001      if (from->size == 0)
1002         to->data=NULL;
1003      else
1004      {
1005         to->data = (png_bytep)png_malloc_warn(png_ptr,
1006           (png_uint_32)from->size);
1007         if (to->data == NULL)
1008         {
1009            png_warning(png_ptr,
1010             "Out of memory while processing unknown chunk.");
1011            to->size = 0;
1012         }
1013         else
1014            png_memcpy(to->data, from->data, from->size);
1015      }
1016   }
1017
1018   info_ptr->unknown_chunks = np;
1019   info_ptr->unknown_chunks_num += num_unknowns;
1020#ifdef PNG_FREE_ME_SUPPORTED
1021   info_ptr->free_me |= PNG_FREE_UNKN;
1022#endif
1023}
1024void PNGAPI
1025png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
1026   int chunk, int location)
1027{
1028   if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
1029       (int)info_ptr->unknown_chunks_num)
1030      info_ptr->unknown_chunks[chunk].location = (png_byte)location;
1031}
1032#endif
1033
1034#if defined(PNG_1_0_X) || defined(PNG_1_2_X)
1035#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
1036    defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
1037void PNGAPI
1038png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
1039{
1040   /* This function is deprecated in favor of png_permit_mng_features()
1041      and will be removed from libpng-1.3.0 */
1042
1043   png_debug(1, "in png_permit_empty_plte, DEPRECATED.");
1044
1045   if (png_ptr == NULL)
1046      return;
1047   png_ptr->mng_features_permitted = (png_byte)
1048     ((png_ptr->mng_features_permitted & (~PNG_FLAG_MNG_EMPTY_PLTE)) |
1049     ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
1050}
1051#endif
1052#endif
1053
1054#ifdef PNG_MNG_FEATURES_SUPPORTED
1055png_uint_32 PNGAPI
1056png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
1057{
1058   png_debug(1, "in png_permit_mng_features");
1059
1060   if (png_ptr == NULL)
1061      return (png_uint_32)0;
1062   png_ptr->mng_features_permitted =
1063     (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
1064   return (png_uint_32)png_ptr->mng_features_permitted;
1065}
1066#endif
1067
1068#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
1069void PNGAPI
1070png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
1071   chunk_list, int num_chunks)
1072{
1073   png_bytep new_list, p;
1074   int i, old_num_chunks;
1075   if (png_ptr == NULL)
1076      return;
1077   if (num_chunks == 0)
1078   {
1079      if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
1080         png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1081      else
1082         png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
1083
1084      if (keep == PNG_HANDLE_CHUNK_ALWAYS)
1085         png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1086      else
1087         png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
1088      return;
1089   }
1090   if (chunk_list == NULL)
1091      return;
1092   old_num_chunks = png_ptr->num_chunk_list;
1093   new_list=(png_bytep)png_malloc(png_ptr,
1094      (png_uint_32)
1095       (5*(num_chunks + old_num_chunks)));
1096   if (png_ptr->chunk_list != NULL)
1097   {
1098      png_memcpy(new_list, png_ptr->chunk_list,
1099          (png_size_t)(5*old_num_chunks));
1100      png_free(png_ptr, png_ptr->chunk_list);
1101      png_ptr->chunk_list=NULL;
1102   }
1103   png_memcpy(new_list + 5*old_num_chunks, chunk_list,
1104       (png_size_t)(5*num_chunks));
1105   for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
1106      *p=(png_byte)keep;
1107   png_ptr->num_chunk_list = old_num_chunks + num_chunks;
1108   png_ptr->chunk_list = new_list;
1109#ifdef PNG_FREE_ME_SUPPORTED
1110   png_ptr->free_me |= PNG_FREE_LIST;
1111#endif
1112}
1113#endif
1114
1115#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
1116void PNGAPI
1117png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
1118   png_user_chunk_ptr read_user_chunk_fn)
1119{
1120   png_debug(1, "in png_set_read_user_chunk_fn");
1121
1122   if (png_ptr == NULL)
1123      return;
1124
1125   png_ptr->read_user_chunk_fn = read_user_chunk_fn;
1126   png_ptr->user_chunk_ptr = user_chunk_ptr;
1127}
1128#endif
1129
1130#ifdef PNG_INFO_IMAGE_SUPPORTED
1131void PNGAPI
1132png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
1133{
1134   png_debug1(1, "in %s storage function", "rows");
1135
1136   if (png_ptr == NULL || info_ptr == NULL)
1137      return;
1138
1139   if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
1140      png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
1141   info_ptr->row_pointers = row_pointers;
1142   if (row_pointers)
1143      info_ptr->valid |= PNG_INFO_IDAT;
1144}
1145#endif
1146
1147void PNGAPI
1148png_set_compression_buffer_size(png_structp png_ptr,
1149    png_uint_32 size)
1150{
1151    if (png_ptr == NULL)
1152       return;
1153    png_free(png_ptr, png_ptr->zbuf);
1154    png_ptr->zbuf_size = (png_size_t)size;
1155    png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
1156    png_ptr->zstream.next_out = png_ptr->zbuf;
1157    png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
1158}
1159
1160void PNGAPI
1161png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
1162{
1163   if (png_ptr && info_ptr)
1164      info_ptr->valid &= ~mask;
1165}
1166
1167
1168#ifndef PNG_1_0_X
1169#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
1170/* Function was added to libpng 1.2.0 and should always exist by default */
1171void PNGAPI
1172png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
1173{
1174/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
1175    if (png_ptr != NULL)
1176    png_ptr->asm_flags = 0;
1177    asm_flags = asm_flags; /* Quiet the compiler */
1178}
1179
1180/* This function was added to libpng 1.2.0 */
1181void PNGAPI
1182png_set_mmx_thresholds (png_structp png_ptr,
1183                        png_byte mmx_bitdepth_threshold,
1184                        png_uint_32 mmx_rowbytes_threshold)
1185{
1186/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
1187    if (png_ptr == NULL)
1188       return;
1189    /* Quiet the compiler */
1190    mmx_bitdepth_threshold = mmx_bitdepth_threshold;
1191    mmx_rowbytes_threshold = mmx_rowbytes_threshold;
1192}
1193#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
1194
1195#ifdef PNG_SET_USER_LIMITS_SUPPORTED
1196/* This function was added to libpng 1.2.6 */
1197void PNGAPI
1198png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
1199    png_uint_32 user_height_max)
1200{
1201   /* Images with dimensions larger than these limits will be
1202    * rejected by png_set_IHDR().  To accept any PNG datastream
1203    * regardless of dimensions, set both limits to 0x7ffffffL.
1204    */
1205   if (png_ptr == NULL)
1206      return;
1207   png_ptr->user_width_max = user_width_max;
1208   png_ptr->user_height_max = user_height_max;
1209}
1210#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
1211
1212
1213#ifdef PNG_BENIGN_ERRORS_SUPPORTED
1214void PNGAPI
1215png_set_benign_errors(png_structp png_ptr, int allowed)
1216{
1217   png_debug(1, "in png_set_benign_errors");
1218
1219   if (allowed)
1220      png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN;
1221   else
1222      png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN;
1223}
1224#endif /* PNG_BENIGN_ERRORS_SUPPORTED */
1225#endif /* ?PNG_1_0_X */
1226#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */