14d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 24d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann/* pngset.c - storage of image information into info struct 34d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * 44d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * Last changed in libpng 1.6.21 [January 15, 2016] 54d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * Copyright (c) 1998-2015 Glenn Randers-Pehrson 64d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) 74d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) 84d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * 94d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * This code is released under the libpng license. 104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * For conditions of distribution and use, see the disclaimer 114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * and license in png.h 124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * 134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * The functions here are used during reads to store data from the file 144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * into the info struct, and during writes to store application data 154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * into the info struct for writing into the file. This abstracts the 164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * info struct and allows us to change the structure in the future. 174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#include "pngpriv.h" 204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_bKGD_SUPPORTED 244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_bKGD(png_const_structrp png_ptr, png_inforp info_ptr, 264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_color_16p background) 274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "bKGD"); 294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL || background == NULL) 314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->background = *background; 344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid |= PNG_INFO_bKGD; 354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_cHRM_SUPPORTED 394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGFAPI 404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_cHRM_fixed(png_const_structrp png_ptr, png_inforp info_ptr, 414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, 424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, 434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed_point blue_x, png_fixed_point blue_y) 444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_xy xy; 464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "cHRM fixed"); 484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL) 504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann xy.redx = red_x; 534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann xy.redy = red_y; 544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann xy.greenx = green_x; 554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann xy.greeny = green_y; 564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann xy.bluex = blue_x; 574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann xy.bluey = blue_y; 584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann xy.whitex = white_x; 594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann xy.whitey = white_y; 604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_colorspace_set_chromaticities(png_ptr, &info_ptr->colorspace, &xy, 624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2/* override with app values*/) != 0) 634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM; 644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_colorspace_sync_info(png_ptr, info_ptr); 664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGFAPI 694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_cHRM_XYZ_fixed(png_const_structrp png_ptr, png_inforp info_ptr, 704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed_point int_red_X, png_fixed_point int_red_Y, 714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed_point int_red_Z, png_fixed_point int_green_X, 724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed_point int_green_Y, png_fixed_point int_green_Z, 734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed_point int_blue_X, png_fixed_point int_blue_Y, 744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed_point int_blue_Z) 754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_XYZ XYZ; 774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "cHRM XYZ fixed"); 794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL) 814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann XYZ.red_X = int_red_X; 844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann XYZ.red_Y = int_red_Y; 854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann XYZ.red_Z = int_red_Z; 864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann XYZ.green_X = int_green_X; 874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann XYZ.green_Y = int_green_Y; 884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann XYZ.green_Z = int_green_Z; 894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann XYZ.blue_X = int_blue_X; 904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann XYZ.blue_Y = int_blue_Y; 914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann XYZ.blue_Z = int_blue_Z; 924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_colorspace_set_endpoints(png_ptr, &info_ptr->colorspace, 944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann &XYZ, 2) != 0) 954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->colorspace.flags |= PNG_COLORSPACE_FROM_cHRM; 964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_colorspace_sync_info(png_ptr, info_ptr); 984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# ifdef PNG_FLOATING_POINT_SUPPORTED 1014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 1024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_cHRM(png_const_structrp png_ptr, png_inforp info_ptr, 1034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann double white_x, double white_y, double red_x, double red_y, 1044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann double green_x, double green_y, double blue_x, double blue_y) 1054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 1064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_set_cHRM_fixed(png_ptr, info_ptr, 1074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, white_x, "cHRM White X"), 1084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, white_y, "cHRM White Y"), 1094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, red_x, "cHRM Red X"), 1104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, red_y, "cHRM Red Y"), 1114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, green_x, "cHRM Green X"), 1124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, green_y, "cHRM Green Y"), 1134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, blue_x, "cHRM Blue X"), 1144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, blue_y, "cHRM Blue Y")); 1154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 1164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 1184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_cHRM_XYZ(png_const_structrp png_ptr, png_inforp info_ptr, double red_X, 1194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann double red_Y, double red_Z, double green_X, double green_Y, double green_Z, 1204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann double blue_X, double blue_Y, double blue_Z) 1214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 1224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_set_cHRM_XYZ_fixed(png_ptr, info_ptr, 1234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, red_X, "cHRM Red X"), 1244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, red_Y, "cHRM Red Y"), 1254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, red_Z, "cHRM Red Z"), 1264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, green_X, "cHRM Green X"), 1274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, green_Y, "cHRM Green Y"), 1284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, green_Z, "cHRM Green Z"), 1294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, blue_X, "cHRM Blue X"), 1304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, blue_Y, "cHRM Blue Y"), 1314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed(png_ptr, blue_Z, "cHRM Blue Z")); 1324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 1334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# endif /* FLOATING_POINT */ 1344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif /* cHRM */ 1364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_gAMA_SUPPORTED 1384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGFAPI 1394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_gAMA_fixed(png_const_structrp png_ptr, png_inforp info_ptr, 1404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed_point file_gamma) 1414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 1424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "gAMA"); 1434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL) 1454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 1464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_colorspace_set_gamma(png_ptr, &info_ptr->colorspace, file_gamma); 1484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_colorspace_sync_info(png_ptr, info_ptr); 1494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 1504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# ifdef PNG_FLOATING_POINT_SUPPORTED 1524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 1534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_gAMA(png_const_structrp png_ptr, png_inforp info_ptr, double file_gamma) 1544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 1554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_set_gAMA_fixed(png_ptr, info_ptr, png_fixed(png_ptr, file_gamma, 1564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann "png_set_gAMA")); 1574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 1584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# endif 1594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 1604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_hIST_SUPPORTED 1624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 1634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_hIST(png_const_structrp png_ptr, png_inforp info_ptr, 1644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_uint_16p hist) 1654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 1664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int i; 1674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "hIST"); 1694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL) 1714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 1724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (info_ptr->num_palette == 0 || info_ptr->num_palette 1744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann > PNG_MAX_PALETTE_LENGTH) 1754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 1764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, 1774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann "Invalid palette size, hIST allocation skipped"); 1784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 1804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 1814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); 1834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in 1854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * version 1.2.1 1864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 1874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->hist = png_voidcast(png_uint_16p, png_malloc_warn(png_ptr, 1884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_MAX_PALETTE_LENGTH * (sizeof (png_uint_16)))); 1894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (info_ptr->hist == NULL) 1914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 1924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, "Insufficient memory for hIST chunk data"); 1934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 1954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 1964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->free_me |= PNG_FREE_HIST; 1984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 1994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann for (i = 0; i < info_ptr->num_palette; i++) 2004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->hist[i] = hist[i]; 2014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid |= PNG_INFO_hIST; 2034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 2044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 2054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 2074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_IHDR(png_const_structrp png_ptr, png_inforp info_ptr, 2084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_uint_32 width, png_uint_32 height, int bit_depth, 2094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int color_type, int interlace_type, int compression_type, 2104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int filter_type) 2114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 2124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "IHDR"); 2134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL) 2154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 2164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->width = width; 2184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->height = height; 2194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->bit_depth = (png_byte)bit_depth; 2204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->color_type = (png_byte)color_type; 2214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->compression_type = (png_byte)compression_type; 2224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->filter_type = (png_byte)filter_type; 2234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->interlace_type = (png_byte)interlace_type; 2244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height, 2264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type, 2274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->compression_type, info_ptr->filter_type); 2284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) 2304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->channels = 1; 2314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else if ((info_ptr->color_type & PNG_COLOR_MASK_COLOR) != 0) 2334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->channels = 3; 2344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 2364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->channels = 1; 2374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if ((info_ptr->color_type & PNG_COLOR_MASK_ALPHA) != 0) 2394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->channels++; 2404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); 2424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); 2444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 2454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_oFFs_SUPPORTED 2474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 2484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_oFFs(png_const_structrp png_ptr, png_inforp info_ptr, 2494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_int_32 offset_x, png_int_32 offset_y, int unit_type) 2504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 2514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "oFFs"); 2524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL) 2544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 2554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->x_offset = offset_x; 2574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->y_offset = offset_y; 2584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->offset_unit_type = (png_byte)unit_type; 2594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid |= PNG_INFO_oFFs; 2604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 2614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 2624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_pCAL_SUPPORTED 2644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 2654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_pCAL(png_const_structrp png_ptr, png_inforp info_ptr, 2664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, 2674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int nparams, png_const_charp units, png_charpp params) 2684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 2694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_size_t length; 2704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int i; 2714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "pCAL"); 2734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL || purpose == NULL || units == NULL 2754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann || (nparams > 0 && params == NULL)) 2764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 2774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann length = strlen(purpose) + 1; 2794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(3, "allocating purpose for info (%lu bytes)", 2804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (unsigned long)length); 2814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* TODO: validate format of calibration name and unit name */ 2834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Check that the type matches the specification. */ 2854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (type < 0 || type > 3) 2864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 2874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_chunk_report(png_ptr, "Invalid pCAL equation type", 2884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_CHUNK_WRITE_ERROR); 2894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 2904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 2914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (nparams < 0 || nparams > 255) 2934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 2944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_chunk_report(png_ptr, "Invalid pCAL parameter count", 2954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_CHUNK_WRITE_ERROR); 2964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 2974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 2984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 2994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Validate params[nparams] */ 3004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann for (i=0; i<nparams; ++i) 3014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 3024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (params[i] == NULL || 3034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann !png_check_fp_string(params[i], strlen(params[i]))) 3044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 3054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_chunk_report(png_ptr, "Invalid format for pCAL parameter", 3064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_CHUNK_WRITE_ERROR); 3074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 3084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 3094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 3104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->pcal_purpose = png_voidcast(png_charp, 3124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_malloc_warn(png_ptr, length)); 3134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (info_ptr->pcal_purpose == NULL) 3154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 3164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_chunk_report(png_ptr, "Insufficient memory for pCAL purpose", 3174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_CHUNK_WRITE_ERROR); 3184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 3194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 3204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(info_ptr->pcal_purpose, purpose, length); 3224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug(3, "storing X0, X1, type, and nparams in info"); 3244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->pcal_X0 = X0; 3254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->pcal_X1 = X1; 3264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->pcal_type = (png_byte)type; 3274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->pcal_nparams = (png_byte)nparams; 3284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann length = strlen(units) + 1; 3304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(3, "allocating units for info (%lu bytes)", 3314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (unsigned long)length); 3324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->pcal_units = png_voidcast(png_charp, 3344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_malloc_warn(png_ptr, length)); 3354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (info_ptr->pcal_units == NULL) 3374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 3384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, "Insufficient memory for pCAL units"); 3394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 3414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 3424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(info_ptr->pcal_units, units, length); 3444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->pcal_params = png_voidcast(png_charpp, png_malloc_warn(png_ptr, 3464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (png_size_t)((nparams + 1) * (sizeof (png_charp))))); 3474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (info_ptr->pcal_params == NULL) 3494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 3504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, "Insufficient memory for pCAL params"); 3514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 3534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 3544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memset(info_ptr->pcal_params, 0, (nparams + 1) * (sizeof (png_charp))); 3564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann for (i = 0; i < nparams; i++) 3584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 3594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann length = strlen(params[i]) + 1; 3604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug2(3, "allocating parameter %d for info (%lu bytes)", i, 3614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (unsigned long)length); 3624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length); 3644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (info_ptr->pcal_params[i] == NULL) 3664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 3674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, "Insufficient memory for pCAL parameter"); 3684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 3704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 3714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(info_ptr->pcal_params[i], params[i], length); 3734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 3744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid |= PNG_INFO_pCAL; 3764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->free_me |= PNG_FREE_PCAL; 3774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 3784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 3794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_sCAL_SUPPORTED 3814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 3824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_sCAL_s(png_const_structrp png_ptr, png_inforp info_ptr, 3834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int unit, png_const_charp swidth, png_const_charp sheight) 3844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 3854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_size_t lengthw = 0, lengthh = 0; 3864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "sCAL"); 3884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL) 3904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 3914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Double check the unit (should never get here with an invalid 3934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * unit unless this is an API call.) 3944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 3954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (unit != 1 && unit != 2) 3964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_error(png_ptr, "Invalid sCAL unit"); 3974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 3984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (swidth == NULL || (lengthw = strlen(swidth)) == 0 || 3994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann swidth[0] == 45 /* '-' */ || !png_check_fp_string(swidth, lengthw)) 4004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_error(png_ptr, "Invalid sCAL width"); 4014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (sheight == NULL || (lengthh = strlen(sheight)) == 0 || 4034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann sheight[0] == 45 /* '-' */ || !png_check_fp_string(sheight, lengthh)) 4044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_error(png_ptr, "Invalid sCAL height"); 4054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->scal_unit = (png_byte)unit; 4074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann ++lengthw; 4094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthw); 4114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->scal_s_width = png_voidcast(png_charp, 4134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_malloc_warn(png_ptr, lengthw)); 4144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (info_ptr->scal_s_width == NULL) 4164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 4174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, "Memory allocation failed while processing sCAL"); 4184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 4204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 4214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(info_ptr->scal_s_width, swidth, lengthw); 4234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann ++lengthh; 4254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(3, "allocating unit for info (%u bytes)", (unsigned int)lengthh); 4274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->scal_s_height = png_voidcast(png_charp, 4294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_malloc_warn(png_ptr, lengthh)); 4304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (info_ptr->scal_s_height == NULL) 4324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 4334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free (png_ptr, info_ptr->scal_s_width); 4344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->scal_s_width = NULL; 4354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, "Memory allocation failed while processing sCAL"); 4374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 4394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 4404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(info_ptr->scal_s_height, sheight, lengthh); 4424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid |= PNG_INFO_sCAL; 4444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->free_me |= PNG_FREE_SCAL; 4454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 4464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# ifdef PNG_FLOATING_POINT_SUPPORTED 4484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 4494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_sCAL(png_const_structrp png_ptr, png_inforp info_ptr, int unit, 4504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann double width, double height) 4514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 4524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "sCAL"); 4534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Check the arguments. */ 4554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (width <= 0) 4564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, "Invalid sCAL width ignored"); 4574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else if (height <= 0) 4594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, "Invalid sCAL height ignored"); 4604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 4624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 4634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Convert 'width' and 'height' to ASCII. */ 4644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann char swidth[PNG_sCAL_MAX_DIGITS+1]; 4654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann char sheight[PNG_sCAL_MAX_DIGITS+1]; 4664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ascii_from_fp(png_ptr, swidth, (sizeof swidth), width, 4684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_sCAL_PRECISION); 4694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ascii_from_fp(png_ptr, sheight, (sizeof sheight), height, 4704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_sCAL_PRECISION); 4714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); 4734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 4744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 4754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# endif 4764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# ifdef PNG_FIXED_POINT_SUPPORTED 4784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 4794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_sCAL_fixed(png_const_structrp png_ptr, png_inforp info_ptr, int unit, 4804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_fixed_point width, png_fixed_point height) 4814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 4824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "sCAL"); 4834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Check the arguments. */ 4854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (width <= 0) 4864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, "Invalid sCAL width ignored"); 4874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else if (height <= 0) 4894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, "Invalid sCAL height ignored"); 4904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 4924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 4934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Convert 'width' and 'height' to ASCII. */ 4944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann char swidth[PNG_sCAL_MAX_DIGITS+1]; 4954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann char sheight[PNG_sCAL_MAX_DIGITS+1]; 4964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 4974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ascii_from_fixed(png_ptr, swidth, (sizeof swidth), width); 4984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ascii_from_fixed(png_ptr, sheight, (sizeof sheight), height); 4994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_set_sCAL_s(png_ptr, info_ptr, unit, swidth, sheight); 5014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 5024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 5034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# endif 5044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 5054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_pHYs_SUPPORTED 5074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 5084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_pHYs(png_const_structrp png_ptr, png_inforp info_ptr, 5094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_uint_32 res_x, png_uint_32 res_y, int unit_type) 5104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 5114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "pHYs"); 5124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL) 5144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 5154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->x_pixels_per_unit = res_x; 5174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->y_pixels_per_unit = res_y; 5184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->phys_unit_type = (png_byte)unit_type; 5194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid |= PNG_INFO_pHYs; 5204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 5214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 5224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 5244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_PLTE(png_structrp png_ptr, png_inforp info_ptr, 5254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_colorp palette, int num_palette) 5264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 5274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_uint_32 max_palette_length; 5294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "PLTE"); 5314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL) 5334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 5344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann max_palette_length = (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) ? 5364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (1 << info_ptr->bit_depth) : PNG_MAX_PALETTE_LENGTH; 5374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (num_palette < 0 || num_palette > (int) max_palette_length) 5394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 5404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) 5414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_error(png_ptr, "Invalid palette length"); 5424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 5444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 5454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, "Invalid palette length"); 5464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 5484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 5494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 5504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if ((num_palette > 0 && palette == NULL) || 5524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (num_palette == 0 5534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# ifdef PNG_MNG_FEATURES_SUPPORTED 5544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann && (png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0 5554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# endif 5564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann )) 5574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 5584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_error(png_ptr, "Invalid palette"); 5594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 5604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* It may not actually be necessary to set png_ptr->palette here; 5624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * we do it for backward compatibility with the way the png_handle_tRNS 5634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * function used to do the allocation. 5644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * 5654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * 1.6.0: the above statement appears to be incorrect; something has to set 5664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * the palette inside png_struct on read. 5674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 5684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); 5694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead 5714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * of num_palette entries, in case of an invalid PNG file or incorrect 5724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * call to png_set_PLTE() with too-large sample values. 5734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 5744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->palette = png_voidcast(png_colorp, png_calloc(png_ptr, 5754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_MAX_PALETTE_LENGTH * (sizeof (png_color)))); 5764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (num_palette > 0) 5784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(png_ptr->palette, palette, num_palette * (sizeof (png_color))); 5794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->palette = png_ptr->palette; 5804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; 5814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->free_me |= PNG_FREE_PLTE; 5834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid |= PNG_INFO_PLTE; 5854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 5864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_sBIT_SUPPORTED 5884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 5894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_sBIT(png_const_structrp png_ptr, png_inforp info_ptr, 5904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_color_8p sig_bit) 5914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 5924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "sBIT"); 5934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL || sig_bit == NULL) 5954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 5964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->sig_bit = *sig_bit; 5984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid |= PNG_INFO_sBIT; 5994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 6004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 6014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_sRGB_SUPPORTED 6034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 6044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_sRGB(png_const_structrp png_ptr, png_inforp info_ptr, int srgb_intent) 6054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 6064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "sRGB"); 6074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL) 6094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 6104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (void)png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, srgb_intent); 6124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_colorspace_sync_info(png_ptr, info_ptr); 6134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 6144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 6164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_sRGB_gAMA_and_cHRM(png_const_structrp png_ptr, png_inforp info_ptr, 6174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int srgb_intent) 6184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 6194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM"); 6204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL) 6224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 6234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_colorspace_set_sRGB(png_ptr, &info_ptr->colorspace, 6254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann srgb_intent) != 0) 6264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 6274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* This causes the gAMA and cHRM to be written too */ 6284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->colorspace.flags |= 6294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM; 6304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 6314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_colorspace_sync_info(png_ptr, info_ptr); 6334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 6344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif /* sRGB */ 6354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_iCCP_SUPPORTED 6384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 6394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_iCCP(png_const_structrp png_ptr, png_inforp info_ptr, 6404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_charp name, int compression_type, 6414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_bytep profile, png_uint_32 proflen) 6424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 6434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_charp new_iccp_name; 6444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_bytep new_iccp_profile; 6454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_size_t length; 6464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "iCCP"); 6484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) 6504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 6514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (compression_type != PNG_COMPRESSION_TYPE_BASE) 6534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_app_error(png_ptr, "Invalid iCCP compression method"); 6544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Set the colorspace first because this validates the profile; do not 6564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * override previously set app cHRM or gAMA here (because likely as not the 6574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * application knows better than libpng what the correct values are.) Pass 6584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * the info_ptr color_type field to png_colorspace_set_ICC because in the 6594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * write case it has not yet been stored in png_ptr. 6604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 6614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 6624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int result = png_colorspace_set_ICC(png_ptr, &info_ptr->colorspace, name, 6634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann proflen, profile, info_ptr->color_type); 6644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_colorspace_sync_info(png_ptr, info_ptr); 6664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Don't do any of the copying if the profile was bad, or inconsistent. */ 6684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (result == 0) 6694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 6704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* But do write the gAMA and cHRM chunks from the profile. */ 6724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->colorspace.flags |= 6734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_COLORSPACE_FROM_gAMA|PNG_COLORSPACE_FROM_cHRM; 6744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 6754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann length = strlen(name)+1; 6774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann new_iccp_name = png_voidcast(png_charp, png_malloc_warn(png_ptr, length)); 6784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (new_iccp_name == NULL) 6804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 6814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_benign_error(png_ptr, "Insufficient memory to process iCCP chunk"); 6824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 6844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 6854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(new_iccp_name, name, length); 6874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann new_iccp_profile = png_voidcast(png_bytep, 6884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_malloc_warn(png_ptr, proflen)); 6894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (new_iccp_profile == NULL) 6914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 6924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free(png_ptr, new_iccp_name); 6934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_benign_error(png_ptr, 6944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann "Insufficient memory to process iCCP profile"); 6954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 6974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 6984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 6994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(new_iccp_profile, profile, proflen); 7004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); 7024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->iccp_proflen = proflen; 7044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->iccp_name = new_iccp_name; 7054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->iccp_profile = new_iccp_profile; 7064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->free_me |= PNG_FREE_ICCP; 7074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid |= PNG_INFO_iCCP; 7084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 7094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 7104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_TEXT_SUPPORTED 7124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 7134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_text(png_const_structrp png_ptr, png_inforp info_ptr, 7144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_textp text_ptr, int num_text) 7154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 7164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int ret; 7174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); 7184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (ret != 0) 7204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_error(png_ptr, "Insufficient memory to store text"); 7214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 7224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannint /* PRIVATE */ 7244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr, 7254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_textp text_ptr, int num_text) 7264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 7274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int i; 7284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %lx storage function", png_ptr == NULL ? 0xabadca11U : 7304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (unsigned long)png_ptr->chunk_name); 7314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL || num_text <= 0 || text_ptr == NULL) 7334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return(0); 7344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Make sure we have enough space in the "text" array in info_struct 7364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * to hold all of the incoming text_ptr objects. This compare can't overflow 7374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * because max_text >= num_text (anyway, subtract of two positive integers 7384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * can't overflow in any case.) 7394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 7404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (num_text > info_ptr->max_text - info_ptr->num_text) 7414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 7424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int old_num_text = info_ptr->num_text; 7434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int max_text; 7444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_textp new_text = NULL; 7454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Calculate an appropriate max_text, checking for overflow. */ 7474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann max_text = old_num_text; 7484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (num_text <= INT_MAX - max_text) 7494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 7504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann max_text += num_text; 7514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Round up to a multiple of 8 */ 7534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (max_text < INT_MAX-8) 7544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann max_text = (max_text + 8) & ~0x7; 7554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 7574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann max_text = INT_MAX; 7584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Now allocate a new array and copy the old members in; this does all 7604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * the overflow checks. 7614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 7624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann new_text = png_voidcast(png_textp,png_realloc_array(png_ptr, 7634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->text, old_num_text, max_text-old_num_text, 7644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann sizeof *new_text)); 7654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 7664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (new_text == NULL) 7684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 7694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_chunk_report(png_ptr, "too many text chunks", 7704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_CHUNK_WRITE_ERROR); 7714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return 1; 7734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 7744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free(png_ptr, info_ptr->text); 7764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->text = new_text; 7784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->free_me |= PNG_FREE_TEXT; 7794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->max_text = max_text; 7804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* num_text is adjusted below as the entries are copied in */ 7814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(3, "allocated %d entries for info_ptr->text", max_text); 7834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 7844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann for (i = 0; i < num_text; i++) 7864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 7874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann size_t text_length, key_len; 7884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann size_t lang_len, lang_key_len; 7894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_textp textp = &(info_ptr->text[info_ptr->num_text]); 7904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (text_ptr[i].key == NULL) 7924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann continue; 7934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 7944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE || 7954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST) 7964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 7974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_chunk_report(png_ptr, "text compression mode is out of range", 7984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_CHUNK_WRITE_ERROR); 7994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann continue; 8004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 8014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann key_len = strlen(text_ptr[i].key); 8034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (text_ptr[i].compression <= 0) 8054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 8064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann lang_len = 0; 8074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann lang_key_len = 0; 8084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 8094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 8114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# ifdef PNG_iTXt_SUPPORTED 8124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 8134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Set iTXt data */ 8144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (text_ptr[i].lang != NULL) 8164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann lang_len = strlen(text_ptr[i].lang); 8174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 8194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann lang_len = 0; 8204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (text_ptr[i].lang_key != NULL) 8224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann lang_key_len = strlen(text_ptr[i].lang_key); 8234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 8254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann lang_key_len = 0; 8264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 8274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# else /* iTXt */ 8284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 8294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_chunk_report(png_ptr, "iTXt chunk not supported", 8304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_CHUNK_WRITE_ERROR); 8314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann continue; 8324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 8334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# endif 8344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') 8364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 8374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann text_length = 0; 8384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# ifdef PNG_iTXt_SUPPORTED 8394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (text_ptr[i].compression > 0) 8404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->compression = PNG_ITXT_COMPRESSION_NONE; 8414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 8434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# endif 8444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->compression = PNG_TEXT_COMPRESSION_NONE; 8454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 8464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 8484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 8494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann text_length = strlen(text_ptr[i].text); 8504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->compression = text_ptr[i].compression; 8514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 8524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->key = png_voidcast(png_charp,png_malloc_base(png_ptr, 8544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann key_len + text_length + lang_len + lang_key_len + 4)); 8554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (textp->key == NULL) 8574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 8584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_chunk_report(png_ptr, "text chunk: out of memory", 8594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_CHUNK_WRITE_ERROR); 8604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return 1; 8624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 8634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug2(2, "Allocated %lu bytes at %p in png_set_text", 8654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (unsigned long)(png_uint_32) 8664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (key_len + lang_len + lang_key_len + text_length + 4), 8674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->key); 8684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(textp->key, text_ptr[i].key, key_len); 8704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann *(textp->key + key_len) = '\0'; 8714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (text_ptr[i].compression > 0) 8734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 8744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->lang = textp->key + key_len + 1; 8754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(textp->lang, text_ptr[i].lang, lang_len); 8764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann *(textp->lang + lang_len) = '\0'; 8774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->lang_key = textp->lang + lang_len + 1; 8784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); 8794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann *(textp->lang_key + lang_key_len) = '\0'; 8804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->text = textp->lang_key + lang_key_len + 1; 8814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 8824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 8844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 8854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->lang=NULL; 8864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->lang_key=NULL; 8874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->text = textp->key + key_len + 1; 8884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 8894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (text_length != 0) 8914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(textp->text, text_ptr[i].text, text_length); 8924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann *(textp->text + text_length) = '\0'; 8944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 8954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# ifdef PNG_iTXt_SUPPORTED 8964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (textp->compression > 0) 8974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 8984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->text_length = 0; 8994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->itxt_length = text_length; 9004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 9014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 9034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# endif 9044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 9054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->text_length = text_length; 9064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann textp->itxt_length = 0; 9074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 9084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->num_text++; 9104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(3, "transferred text chunk %d", info_ptr->num_text); 9114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 9124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return(0); 9144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 9154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 9164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_tIME_SUPPORTED 9184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 9194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_tIME(png_const_structrp png_ptr, png_inforp info_ptr, 9204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_timep mod_time) 9214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 9224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "tIME"); 9234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL || mod_time == NULL || 9254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (png_ptr->mode & PNG_WROTE_tIME) != 0) 9264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 9274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (mod_time->month == 0 || mod_time->month > 12 || 9294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann mod_time->day == 0 || mod_time->day > 31 || 9304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann mod_time->hour > 23 || mod_time->minute > 59 || 9314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann mod_time->second > 60) 9324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 9334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, "Ignoring invalid time value"); 9344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 9364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 9374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->mod_time = *mod_time; 9394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid |= PNG_INFO_tIME; 9404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 9414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 9424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_tRNS_SUPPORTED 9444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 9454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_tRNS(png_structrp png_ptr, png_inforp info_ptr, 9464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color) 9474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 9484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "tRNS"); 9494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL) 9514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 9534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (trans_alpha != NULL) 9554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 9564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* It may not actually be necessary to set png_ptr->trans_alpha here; 9574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * we do it for backward compatibility with the way the png_handle_tRNS 9584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * function used to do the allocation. 9594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * 9604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * 1.6.0: The above statement is incorrect; png_handle_tRNS effectively 9614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * relies on png_set_tRNS storing the information in png_struct 9624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * (otherwise it won't be there for the code in pngrtran.c). 9634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 9644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); 9664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) 9684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 9694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ 9704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->trans_alpha = png_voidcast(png_bytep, 9714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_malloc(png_ptr, PNG_MAX_PALETTE_LENGTH)); 9724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(info_ptr->trans_alpha, trans_alpha, (png_size_t)num_trans); 9744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 9754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->trans_alpha = info_ptr->trans_alpha; 9764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 9774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (trans_color != NULL) 9794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 9804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_WARNINGS_SUPPORTED 9814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (info_ptr->bit_depth < 16) 9824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 9834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int sample_max = (1 << info_ptr->bit_depth) - 1; 9844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && 9864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann trans_color->gray > sample_max) || 9874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (info_ptr->color_type == PNG_COLOR_TYPE_RGB && 9884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (trans_color->red > sample_max || 9894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann trans_color->green > sample_max || 9904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann trans_color->blue > sample_max))) 9914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, 9924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann "tRNS chunk has out-of-range samples for bit_depth"); 9934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 9944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 9954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->trans_color = *trans_color; 9974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 9984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (num_trans == 0) 9994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann num_trans = 1; 10004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 10014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->num_trans = (png_uint_16)num_trans; 10034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (num_trans != 0) 10054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 10064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid |= PNG_INFO_tRNS; 10074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->free_me |= PNG_FREE_TRNS; 10084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 10094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 10104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 10114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_sPLT_SUPPORTED 10134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 10144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_sPLT(png_const_structrp png_ptr, 10154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_inforp info_ptr, png_const_sPLT_tp entries, int nentries) 10164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann/* 10174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * entries - array of png_sPLT_t structures 10184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * to be added to the list of palettes 10194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * in the info structure. 10204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * 10214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * nentries - number of palette structures to be 10224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * added. 10234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 10244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 10254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_sPLT_tp np; 10264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL || nentries <= 0 || entries == NULL) 10284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 10294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Use the internal realloc function, which checks for all the possible 10314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * overflows. Notice that the parameters are (int) and (size_t) 10324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 10334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np = png_voidcast(png_sPLT_tp,png_realloc_array(png_ptr, 10344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->splt_palettes, info_ptr->splt_palettes_num, nentries, 10354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann sizeof *np)); 10364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (np == NULL) 10384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 10394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Out of memory or too many chunks */ 10404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_chunk_report(png_ptr, "too many sPLT chunks", PNG_CHUNK_WRITE_ERROR); 10414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 10434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 10444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free(png_ptr, info_ptr->splt_palettes); 10464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->splt_palettes = np; 10474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->free_me |= PNG_FREE_SPLT; 10484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np += info_ptr->splt_palettes_num; 10504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann do 10524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 10534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_size_t length; 10544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Skip invalid input entries */ 10564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (entries->name == NULL || entries->entries == NULL) 10574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 10584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* png_handle_sPLT doesn't do this, so this is an app error */ 10594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_app_error(png_ptr, "png_set_sPLT: invalid sPLT"); 10604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Just skip the invalid entry */ 10614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann continue; 10624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 10634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np->depth = entries->depth; 10654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* In the event of out-of-memory just return - there's no point keeping 10674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * on trying to add sPLT chunks. 10684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 10694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann length = strlen(entries->name) + 1; 10704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np->name = png_voidcast(png_charp, png_malloc_base(png_ptr, length)); 10714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (np->name == NULL) 10734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann break; 10744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(np->name, entries->name, length); 10764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* IMPORTANT: we have memory now that won't get freed if something else 10784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * goes wrong; this code must free it. png_malloc_array produces no 10794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * warnings; use a png_chunk_report (below) if there is an error. 10804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 10814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np->entries = png_voidcast(png_sPLT_entryp, png_malloc_array(png_ptr, 10824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann entries->nentries, sizeof (png_sPLT_entry))); 10834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (np->entries == NULL) 10854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 10864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free(png_ptr, np->name); 10874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np->name = NULL; 10884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann break; 10894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 10904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np->nentries = entries->nentries; 10924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* This multiply can't overflow because png_malloc_array has already 10934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * checked it when doing the allocation. 10944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 10954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(np->entries, entries->entries, 10964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann entries->nentries * sizeof (png_sPLT_entry)); 10974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 10984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Note that 'continue' skips the advance of the out pointer and out 10994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * count, so an invalid entry is not added. 11004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 11014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid |= PNG_INFO_sPLT; 11024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann ++(info_ptr->splt_palettes_num); 11034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann ++np; 11044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 11054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann while (++entries, --nentries); 11064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (nentries > 0) 11084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_chunk_report(png_ptr, "sPLT out of memory", PNG_CHUNK_WRITE_ERROR); 11094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 11104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif /* sPLT */ 11114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED 11134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannstatic png_byte 11144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmanncheck_location(png_const_structrp png_ptr, int location) 11154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 11164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann location &= (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT); 11174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* New in 1.6.0; copy the location and check it. This is an API 11194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * change; previously the app had to use the 11204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * png_set_unknown_chunk_location API below for each chunk. 11214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 11224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (location == 0 && (png_ptr->mode & PNG_IS_READ_STRUCT) == 0) 11234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 11244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Write struct, so unknown chunks come from the app */ 11254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_app_warning(png_ptr, 11264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann "png_set_unknown_chunks now expects a valid location"); 11274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Use the old behavior */ 11284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann location = (png_byte)(png_ptr->mode & 11294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT)); 11304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 11314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* This need not be an internal error - if the app calls 11334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * png_set_unknown_chunks on a read pointer it must get the location right. 11344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 11354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (location == 0) 11364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_error(png_ptr, "invalid location in png_set_unknown_chunks"); 11374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Now reduce the location to the top-most set bit by removing each least 11394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * significant bit in turn. 11404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 11414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann while (location != (location & -location)) 11424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann location &= ~(location & -location); 11434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* The cast is safe because 'location' is a bit mask and only the low four 11454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * bits are significant. 11464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 11474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return (png_byte)location; 11484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 11494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 11514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_unknown_chunks(png_const_structrp png_ptr, 11524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_inforp info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns) 11534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 11544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_unknown_chunkp np; 11554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL || num_unknowns <= 0 || 11574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann unknowns == NULL) 11584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 11594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Check for the failure cases where support has been disabled at compile 11614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * time. This code is hardly ever compiled - it's here because 11624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * STORE_UNKNOWN_CHUNKS is set by both read and write code (compiling in this 11634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * code) but may be meaningless if the read or write handling of unknown 11644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * chunks is not compiled in. 11654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 11664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# if !defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) && \ 11674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann defined(PNG_READ_SUPPORTED) 11684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) 11694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 11704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_app_error(png_ptr, "no unknown chunk support on read"); 11714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 11734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 11744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# endif 11754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# if !defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) && \ 11764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann defined(PNG_WRITE_SUPPORTED) 11774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if ((png_ptr->mode & PNG_IS_READ_STRUCT) == 0) 11784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 11794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_app_error(png_ptr, "no unknown chunk support on write"); 11804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 11824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 11834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# endif 11844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Prior to 1.6.0 this code used png_malloc_warn; however, this meant that 11864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * unknown critical chunks could be lost with just a warning resulting in 11874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * undefined behavior. Now png_chunk_report is used to provide behavior 11884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * appropriate to read or write. 11894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 11904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np = png_voidcast(png_unknown_chunkp, png_realloc_array(png_ptr, 11914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->unknown_chunks, info_ptr->unknown_chunks_num, num_unknowns, 11924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann sizeof *np)); 11934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (np == NULL) 11954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 11964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_chunk_report(png_ptr, "too many unknown chunks", 11974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_CHUNK_WRITE_ERROR); 11984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 11994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 12004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 12014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free(png_ptr, info_ptr->unknown_chunks); 12034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->unknown_chunks = np; /* safe because it is initialized */ 12044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->free_me |= PNG_FREE_UNKN; 12054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np += info_ptr->unknown_chunks_num; 12074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Increment unknown_chunks_num each time round the loop to protect the 12094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * just-allocated chunk data. 12104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 12114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann for (; num_unknowns > 0; --num_unknowns, ++unknowns) 12124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 12134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(np->name, unknowns->name, (sizeof np->name)); 12144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np->name[(sizeof np->name)-1] = '\0'; 12154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np->location = check_location(png_ptr, unknowns->location); 12164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (unknowns->size == 0) 12184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 12194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np->data = NULL; 12204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np->size = 0; 12214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 12224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 12244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 12254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np->data = png_voidcast(png_bytep, 12264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_malloc_base(png_ptr, unknowns->size)); 12274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (np->data == NULL) 12294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 12304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_chunk_report(png_ptr, "unknown chunk: out of memory", 12314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_CHUNK_WRITE_ERROR); 12324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* But just skip storing the unknown chunk */ 12334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann continue; 12344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 12354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(np->data, unknowns->data, unknowns->size); 12374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann np->size = unknowns->size; 12384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 12394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* These increments are skipped on out-of-memory for the data - the 12414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * unknown chunk entry gets overwritten if the png_chunk_report returns. 12424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * This is correct in the read case (the chunk is just dropped.) 12434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 12444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann ++np; 12454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann ++(info_ptr->unknown_chunks_num); 12464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 12474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 12484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 12504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_unknown_chunk_location(png_const_structrp png_ptr, png_inforp info_ptr, 12514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int chunk, int location) 12524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 12534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* This API is pretty pointless in 1.6.0 because the location can be set 12544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * before the call to png_set_unknown_chunks. 12554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * 12564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * TODO: add a png_app_warning in 1.7 12574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 12584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && 12594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann chunk < info_ptr->unknown_chunks_num) 12604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 12614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if ((location & (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT)) == 0) 12624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 12634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_app_error(png_ptr, "invalid unknown chunk location"); 12644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Fake out the pre 1.6.0 behavior: */ 12654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if ((location & PNG_HAVE_IDAT) != 0) /* undocumented! */ 12664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann location = PNG_AFTER_IDAT; 12674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 12694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann location = PNG_HAVE_IHDR; /* also undocumented */ 12704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 12714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->unknown_chunks[chunk].location = 12734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann check_location(png_ptr, location); 12744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 12754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 12764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif /* STORE_UNKNOWN_CHUNKS */ 12774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_MNG_FEATURES_SUPPORTED 12794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_uint_32 PNGAPI 12804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_permit_mng_features (png_structrp png_ptr, png_uint_32 mng_features) 12814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 12824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug(1, "in png_permit_mng_features"); 12834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL) 12854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return 0; 12864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->mng_features_permitted = mng_features & PNG_ALL_MNG_FEATURES; 12884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return png_ptr->mng_features_permitted; 12904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 12914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 12924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED 12944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannstatic unsigned int 12954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannadd_one_chunk(png_bytep list, unsigned int count, png_const_bytep add, int keep) 12964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 12974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann unsigned int i; 12984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 12994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Utility function: update the 'keep' state of a chunk if it is already in 13004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * the list, otherwise add it to the list. 13014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 13024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann for (i=0; i<count; ++i, list += 5) 13034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 13044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (memcmp(list, add, 4) == 0) 13054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 13064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann list[4] = (png_byte)keep; 13074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return count; 13094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 13104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 13114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (keep != PNG_HANDLE_CHUNK_AS_DEFAULT) 13134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 13144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann ++count; 13154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(list, add, 4); 13164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann list[4] = (png_byte)keep; 13174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 13184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return count; 13204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 13214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 13234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_keep_unknown_chunks(png_structrp png_ptr, int keep, 13244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_bytep chunk_list, int num_chunks_in) 13254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 13264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_bytep new_list; 13274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann unsigned int num_chunks, old_num_chunks; 13284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL) 13304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 13314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (keep < 0 || keep >= PNG_HANDLE_CHUNK_LAST) 13334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 13344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_app_error(png_ptr, "png_set_keep_unknown_chunks: invalid keep"); 13354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 13374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 13384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (num_chunks_in <= 0) 13404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 13414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->unknown_default = keep; 13424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* '0' means just set the flags, so stop here */ 13444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (num_chunks_in == 0) 13454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 13464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 13474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (num_chunks_in < 0) 13494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 13504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Ignore all unknown chunks and all chunks recognized by 13514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * libpng except for IHDR, PLTE, tRNS, IDAT, and IEND 13524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 13534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann static PNG_CONST png_byte chunks_to_ignore[] = { 13544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 98, 75, 71, 68, '\0', /* bKGD */ 13554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 99, 72, 82, 77, '\0', /* cHRM */ 13564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 103, 65, 77, 65, '\0', /* gAMA */ 13574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 104, 73, 83, 84, '\0', /* hIST */ 13584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 105, 67, 67, 80, '\0', /* iCCP */ 13594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 105, 84, 88, 116, '\0', /* iTXt */ 13604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 111, 70, 70, 115, '\0', /* oFFs */ 13614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 112, 67, 65, 76, '\0', /* pCAL */ 13624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 112, 72, 89, 115, '\0', /* pHYs */ 13634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 115, 66, 73, 84, '\0', /* sBIT */ 13644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 115, 67, 65, 76, '\0', /* sCAL */ 13654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 115, 80, 76, 84, '\0', /* sPLT */ 13664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 115, 84, 69, 82, '\0', /* sTER */ 13674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 115, 82, 71, 66, '\0', /* sRGB */ 13684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 116, 69, 88, 116, '\0', /* tEXt */ 13694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 116, 73, 77, 69, '\0', /* tIME */ 13704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 122, 84, 88, 116, '\0' /* zTXt */ 13714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann }; 13724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann chunk_list = chunks_to_ignore; 13744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann num_chunks = (unsigned int)/*SAFE*/(sizeof chunks_to_ignore)/5U; 13754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 13764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else /* num_chunks_in > 0 */ 13784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 13794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (chunk_list == NULL) 13804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 13814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Prior to 1.6.0 this was silently ignored, now it is an app_error 13824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * which can be switched off. 13834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 13844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_app_error(png_ptr, "png_set_keep_unknown_chunks: no chunk list"); 13854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 13874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 13884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann num_chunks = num_chunks_in; 13904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 13914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann old_num_chunks = png_ptr->num_chunk_list; 13934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr->chunk_list == NULL) 13944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann old_num_chunks = 0; 13954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 13964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Since num_chunks is always restricted to UINT_MAX/5 this can't overflow. 13974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 13984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (num_chunks + old_num_chunks > UINT_MAX/5) 13994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 14004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_app_error(png_ptr, "png_set_keep_unknown_chunks: too many chunks"); 14014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 14034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 14044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* If these chunks are being reset to the default then no more memory is 14064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * required because add_one_chunk above doesn't extend the list if the 'keep' 14074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * parameter is the default. 14084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 14094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (keep != 0) 14104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 14114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann new_list = png_voidcast(png_bytep, png_malloc(png_ptr, 14124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 5 * (num_chunks + old_num_chunks))); 14134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (old_num_chunks > 0) 14154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(new_list, png_ptr->chunk_list, 5*old_num_chunks); 14164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 14174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else if (old_num_chunks > 0) 14194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann new_list = png_ptr->chunk_list; 14204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 14224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann new_list = NULL; 14234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Add the new chunks together with each one's handling code. If the chunk 14254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * already exists the code is updated, otherwise the chunk is added to the 14264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * end. (In libpng 1.6.0 order no longer matters because this code enforces 14274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * the earlier convention that the last setting is the one that is used.) 14284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 14294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (new_list != NULL) 14304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 14314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_bytep inlist; 14324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_bytep outlist; 14334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann unsigned int i; 14344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann for (i=0; i<num_chunks; ++i) 14364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 14374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann old_num_chunks = add_one_chunk(new_list, old_num_chunks, 14384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann chunk_list+5*i, keep); 14394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 14404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Now remove any spurious 'default' entries. */ 14424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann num_chunks = 0; 14434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann for (i=0, inlist=outlist=new_list; i<old_num_chunks; ++i, inlist += 5) 14444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 14454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (inlist[4]) 14464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 14474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (outlist != inlist) 14484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann memcpy(outlist, inlist, 5); 14494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann outlist += 5; 14504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann ++num_chunks; 14514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 14524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 14534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* This means the application has removed all the specialized handling. */ 14554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (num_chunks == 0) 14564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 14574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr->chunk_list != new_list) 14584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free(png_ptr, new_list); 14594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann new_list = NULL; 14614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 14624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 14634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 14654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann num_chunks = 0; 14664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->num_chunk_list = num_chunks; 14684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr->chunk_list != new_list) 14704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 14714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr->chunk_list != NULL) 14724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free(png_ptr, png_ptr->chunk_list); 14734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->chunk_list = new_list; 14754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 14764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 14774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 14784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_READ_USER_CHUNKS_SUPPORTED 14804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 14814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_read_user_chunk_fn(png_structrp png_ptr, png_voidp user_chunk_ptr, 14824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_user_chunk_ptr read_user_chunk_fn) 14834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 14844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug(1, "in png_set_read_user_chunk_fn"); 14854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL) 14874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 14884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->read_user_chunk_fn = read_user_chunk_fn; 14904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->user_chunk_ptr = user_chunk_ptr; 14914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 14924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 14934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 14944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_INFO_IMAGE_SUPPORTED 14954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 14964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_rows(png_const_structrp png_ptr, png_inforp info_ptr, 14974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_bytepp row_pointers) 14984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 14994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug1(1, "in %s storage function", "rows"); 15004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL || info_ptr == NULL) 15024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 15034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (info_ptr->row_pointers != NULL && 15054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann (info_ptr->row_pointers != row_pointers)) 15064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); 15074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->row_pointers = row_pointers; 15094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (row_pointers != NULL) 15114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid |= PNG_INFO_IDAT; 15124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 15134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 15144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 15164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_compression_buffer_size(png_structrp png_ptr, png_size_t size) 15174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 15184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL) 15194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 15204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (size == 0 || size > PNG_UINT_31_MAX) 15224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_error(png_ptr, "invalid compression buffer size"); 15234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# ifdef PNG_SEQUENTIAL_READ_SUPPORTED 15254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0) 15264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 15274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->IDAT_read_size = (png_uint_32)size; /* checked above */ 15284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 15294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 15304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# endif 15314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# ifdef PNG_WRITE_SUPPORTED 15334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if ((png_ptr->mode & PNG_IS_READ_STRUCT) == 0) 15344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 15354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr->zowner != 0) 15364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 15374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, 15384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann "Compression buffer size cannot be changed because it is in use"); 15394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 15414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 15424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifndef __COVERITY__ 15444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Some compilers complain that this is always false. However, it 15454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * can be true when integer overflow happens. 15464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 15474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (size > ZLIB_IO_MAX) 15484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 15494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, 15504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann "Compression buffer size limited to system maximum"); 15514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann size = ZLIB_IO_MAX; /* must fit */ 15524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 15534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 15544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (size < 6) 15564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 15574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Deflate will potentially go into an infinite loop on a SYNC_FLUSH 15584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * if this is permitted. 15594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 15604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, 15614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann "Compression buffer size cannot be reduced below 6"); 15624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 15644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 15654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr->zbuffer_size != size) 15674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 15684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_free_buffer_list(png_ptr, &png_ptr->zbuffer_list); 15694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->zbuffer_size = (uInt)size; 15704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 15714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 15724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann# endif 15734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 15744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 15764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_invalid(png_const_structrp png_ptr, png_inforp info_ptr, int mask) 15774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 15784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr != NULL && info_ptr != NULL) 15794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann info_ptr->valid &= ~mask; 15804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 15814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_SET_USER_LIMITS_SUPPORTED 15844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann/* This function was added to libpng 1.2.6 */ 15854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 15864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_user_limits (png_structrp png_ptr, png_uint_32 user_width_max, 15874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_uint_32 user_height_max) 15884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 15894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Images with dimensions larger than these limits will be 15904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * rejected by png_set_IHDR(). To accept any PNG datastream 15914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * regardless of dimensions, set both limits to 0x7fffffff. 15924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 15934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr == NULL) 15944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return; 15954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 15964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->user_width_max = user_width_max; 15974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->user_height_max = user_height_max; 15984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 15994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann/* This function was added to libpng 1.4.0 */ 16014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 16024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_chunk_cache_max (png_structrp png_ptr, png_uint_32 user_chunk_cache_max) 16034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 16044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr != NULL) 16054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->user_chunk_cache_max = user_chunk_cache_max; 16064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 16074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann/* This function was added to libpng 1.4.1 */ 16094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 16104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_chunk_malloc_max (png_structrp png_ptr, 16114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_alloc_size_t user_chunk_malloc_max) 16124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 16134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (png_ptr != NULL) 16144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->user_chunk_malloc_max = user_chunk_malloc_max; 16154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 16164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif /* ?SET_USER_LIMITS */ 16174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_BENIGN_ERRORS_SUPPORTED 16204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 16214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_benign_errors(png_structrp png_ptr, int allowed) 16224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 16234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug(1, "in png_set_benign_errors"); 16244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* If allowed is 1, png_benign_error() is treated as a warning. 16264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * 16274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * If allowed is 0, png_benign_error() is treated as an error (which 16284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * is the default behavior if png_set_benign_errors() is not called). 16294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 16304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (allowed != 0) 16324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN | 16334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN; 16344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 16364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->flags &= ~(PNG_FLAG_BENIGN_ERRORS_WARN | 16374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_FLAG_APP_WARNINGS_WARN | PNG_FLAG_APP_ERRORS_WARN); 16384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 16394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif /* BENIGN_ERRORS */ 16404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED 16424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Whether to report invalid palette index; added at libng-1.5.10. 16434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * It is possible for an indexed (color-type==3) PNG file to contain 16444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * pixels with invalid (out-of-range) indexes if the PLTE chunk has 16454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * fewer entries than the image's bit-depth would allow. We recover 16464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * from this gracefully by filling any incomplete palette with zeros 16474d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * (opaque black). By default, when this occurs libpng will issue 16484d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * a benign error. This API can be used to override that behavior. 16494d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 16504d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannvoid PNGAPI 16514d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_set_check_for_invalid_index(png_structrp png_ptr, int allowed) 16524d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 16534d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug(1, "in png_set_check_for_invalid_index"); 16544d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16554d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (allowed > 0) 16564d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->num_palette_max = 0; 16574d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16584d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else 16594d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_ptr->num_palette_max = -1; 16604d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 16614d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif 16624d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16634d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) || \ 16644d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) 16654d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann/* Check that the tEXt or zTXt keyword is valid per PNG 1.0 specification, 16664d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * and if invalid, correct the keyword rather than discarding the entire 16674d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * chunk. The PNG 1.0 specification requires keywords 1-79 characters in 16684d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * length, forbids leading or trailing whitespace, multiple internal spaces, 16694d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * and the non-break space (0x80) from ISO 8859-1. Returns keyword length. 16704d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * 16714d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * The 'new_key' buffer must be 80 characters in size (for the keyword plus a 16724d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * trailing '\0'). If this routine returns 0 then there was no keyword, or a 16734d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * valid one could not be generated, and the caller must png_error. 16744d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 16754d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_uint_32 /* PRIVATE */ 16764d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmannpng_check_keyword(png_structrp png_ptr, png_const_charp key, png_bytep new_key) 16774d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann{ 16784d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_const_charp orig_key = key; 16794d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_uint_32 key_len = 0; 16804d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int bad_character = 0; 16814d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann int space = 1; 16824d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16834d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_debug(1, "in png_check_keyword"); 16844d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16854d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (key == NULL) 16864d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 16874d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann *new_key = 0; 16884d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return 0; 16894d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 16904d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16914d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann while (*key && key_len < 79) 16924d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 16934d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_byte ch = (png_byte)*key++; 16944d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16954d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if ((ch > 32 && ch <= 126) || (ch >= 161 /*&& ch <= 255*/)) 16964d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann *new_key++ = ch, ++key_len, space = 0; 16974d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 16984d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else if (space == 0) 16994d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 17004d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* A space or an invalid character when one wasn't seen immediately 17014d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann * before; output just a space. 17024d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann */ 17034d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann *new_key++ = 32, ++key_len, space = 1; 17044d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 17054d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* If the character was not a space then it is invalid. */ 17064d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (ch != 32) 17074d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann bad_character = ch; 17084d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 17094d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 17104d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else if (bad_character == 0) 17114d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann bad_character = ch; /* just skip it, record the first error */ 17124d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 17134d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 17144d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (key_len > 0 && space != 0) /* trailing space */ 17154d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 17164d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann --key_len, --new_key; 17174d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (bad_character == 0) 17184d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann bad_character = 32; 17194d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 17204d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 17214d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Terminate the keyword */ 17224d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann *new_key = 0; 17234d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 17244d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (key_len == 0) 17254d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return 0; 17264d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 17274d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#ifdef PNG_WARNINGS_SUPPORTED 17284d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann /* Try to only output one warning per keyword: */ 17294d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann if (*key != 0) /* keyword too long */ 17304d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning(png_ptr, "keyword truncated"); 17314d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 17324d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann else if (bad_character != 0) 17334d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann { 17344d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann PNG_WARNING_PARAMETERS(p) 17354d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 17364d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning_parameter(p, 1, orig_key); 17374d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_warning_parameter_signed(p, 2, PNG_NUMBER_FORMAT_02x, bad_character); 17384d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 17394d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann png_formatted_warning(png_ptr, p, "keyword \"@1\": bad character '0x@2'"); 17404d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann } 17414d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif /* WARNINGS */ 17424d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann 17434d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann return key_len; 17444d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann} 17454d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif /* TEXT || pCAL || iCCP || sPLT */ 17464d3acf4ec42bf6e838f9060103aff98fbf170794Philip P. Moltmann#endif /* READ || WRITE */ 1747