1893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 2893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* png.c - location for general purpose libpng functions 3893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * 466dce0da6a5db51ee0c2875517d3a6ca6cbbe53dEric Vannier * Last changed in libpng 1.2.46 [February 25, 2011] 566dce0da6a5db51ee0c2875517d3a6ca6cbbe53dEric Vannier * Copyright (c) 1998-2011 Glenn Randers-Pehrson 6893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) 7893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) 8a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * 9a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * This code is released under the libpng license. 10a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * For conditions of distribution and use, see the disclaimer 11a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * and license in png.h 12893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 13893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 14893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#define PNG_INTERNAL 15893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#define PNG_NO_EXTERN 165f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#define PNG_NO_PEDANTIC_WARNINGS 17893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#include "png.h" 18893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 19893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Generate a compiler error if there is an old png.h in the search path. */ 2066dce0da6a5db51ee0c2875517d3a6ca6cbbe53dEric Vanniertypedef version_1_2_46 Your_png_h_is_not_version_1_2_46; 21893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 22893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Version information for C files. This had better match the version 235f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott * string defined in png.h. 245f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott */ 25893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 26893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_USE_GLOBAL_ARRAYS 27893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* png_libpng_ver was changed to a function in version 1.0.5c */ 28893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST char png_libpng_ver[18] = PNG_LIBPNG_VER_STRING; 29893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 30893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_READ_SUPPORTED 31893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 32893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* png_sig was changed to a function in version 1.0.5c */ 33893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Place to hold the signature string for a PNG file. */ 34893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10}; 35893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_READ_SUPPORTED */ 36893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 37893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Invoke global declarations for constant strings for known chunk types */ 38893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_IHDR; 39893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_IDAT; 40893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_IEND; 41893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_PLTE; 42893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_bKGD; 43893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_cHRM; 44893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_gAMA; 45893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_hIST; 46893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_iCCP; 47893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_iTXt; 48893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_oFFs; 49893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_pCAL; 50893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_sCAL; 51893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_pHYs; 52893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_sBIT; 53893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_sPLT; 54893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_sRGB; 55893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_tEXt; 56893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_tIME; 57893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_tRNS; 58893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_zTXt; 59893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 60893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_READ_SUPPORTED 61a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ 62893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 63a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* Start of interlace block */ 64893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; 65893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 66a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* Offset to next interlace block */ 67893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; 68893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 69a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* Start of interlace block in the y direction */ 70893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; 71893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 72a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* Offset to next interlace block in the y direction */ 73893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; 74893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 75893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Height of interlace block. This is not currently used - if you need 76893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * it, uncomment it here and in png.h 77893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; 78893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project*/ 79893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 80893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Mask to determine which pixels are valid in a pass */ 815f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick ScottPNG_CONST int FARDATA png_pass_mask[] = 825f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; 83893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 84893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Mask to determine which pixels to overwrite while displaying */ 85893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_dsp_mask[] 86893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff}; 87893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 88893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_READ_SUPPORTED */ 89893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_USE_GLOBAL_ARRAYS */ 90893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 91893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Tells libpng that we have already handled the first "num_bytes" bytes 92893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * of the PNG file signature. If the PNG data is embedded into another 93893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * stream we can set num_bytes = 8 so that libpng will not attempt to read 94893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * or write any of the magic bytes before it starts on the IHDR. 95893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 96893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 97893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_READ_SUPPORTED 98893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 99893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_set_sig_bytes(png_structp png_ptr, int num_bytes) 100893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 1015f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_debug(1, "in png_set_sig_bytes"); 1025f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 103a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 104a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return; 1055f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 106893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (num_bytes > 8) 107893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_error(png_ptr, "Too many bytes for PNG signature."); 108893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 109893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes); 110893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 111893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 112893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Checks whether the supplied bytes match the PNG signature. We allow 113893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * checking less than the full 8-byte signature so that those apps that 114893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * already read the first few bytes of a file to determine the file type 115893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * can simply check the remaining bytes for extra assurance. Returns 116893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * an integer less than, equal to, or greater than zero if sig is found, 117893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * respectively, to be less than, to match, or be greater than the correct 118893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * PNG signature (this is the same behaviour as strcmp, memcmp, etc). 119893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 120893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 121893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check) 122893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 123893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10}; 124893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (num_to_check > 8) 125893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project num_to_check = 8; 126893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (num_to_check < 1) 127893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (-1); 128893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 129893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (start > 7) 130893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (-1); 131893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 132893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (start + num_to_check > 8) 133893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project num_to_check = 8 - start; 134893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 135893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check))); 136893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 137893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 138893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_1_0_X) || defined(PNG_1_2_X) 139893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* (Obsolete) function to check signature bytes. It does not allow one 140893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * to check a partial signature. This function might be removed in the 141893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * future - use png_sig_cmp(). Returns true (nonzero) if the file is PNG. 142893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 143893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 144893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_check_sig(png_bytep sig, int num) 145893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 146893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num)); 147893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 148893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 149893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_READ_SUPPORTED */ 150893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 151893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 152893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Function to allocate memory for zlib and clear it to 0. */ 153893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_1_0_X 154893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoidpf PNGAPI 155893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 1565f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scottvoidpf /* PRIVATE */ 157893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 158893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_zalloc(voidpf png_ptr, uInt items, uInt size) 159893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 160893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_voidp ptr; 161893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_structp p=(png_structp)png_ptr; 162893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_uint_32 save_flags=p->flags; 163893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_uint_32 num_bytes; 164893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 165a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 166a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return (NULL); 167893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (items > PNG_UINT_32_MAX/size) 168893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 169893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_warning (p, "Potential overflow in png_zalloc()"); 170893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (NULL); 171893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 172893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project num_bytes = (png_uint_32)items * size; 173893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 174893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; 175893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes); 176893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project p->flags=save_flags; 177893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 178893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_1_0_X) && !defined(PNG_NO_ZALLOC_ZERO) 179893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (ptr == NULL) 180893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((voidpf)ptr); 181893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 182893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (num_bytes > (png_uint_32)0x8000L) 183893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 184893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_memset(ptr, 0, (png_size_t)0x8000L); 185893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_memset((png_bytep)ptr + (png_size_t)0x8000L, 0, 186893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project (png_size_t)(num_bytes - (png_uint_32)0x8000L)); 187893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 188893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 189893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 190893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_memset(ptr, 0, (png_size_t)num_bytes); 191893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 192893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 193893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((voidpf)ptr); 194893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 195893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 196a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* Function to free memory for zlib */ 197893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_1_0_X 198893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 199893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 2005f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scottvoid /* PRIVATE */ 201893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 202893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_zfree(voidpf png_ptr, voidpf ptr) 203893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 204893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free((png_structp)png_ptr, (png_voidp)ptr); 205893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 206893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 207893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Reset the CRC variable to 32 bits of 1's. Care must be taken 208893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * in case CRC is > 32 bits to leave the top bits 0. 209893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 210893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid /* PRIVATE */ 211893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_reset_crc(png_structp png_ptr) 212893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 213893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->crc = crc32(0, Z_NULL, 0); 214893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 215893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 216893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Calculate the CRC over a section of data. We can only pass as 217893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * much data to this routine as the largest single buffer size. We 218893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * also check that this data will actually be used before going to the 219893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * trouble of calculating it. 220893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 221893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid /* PRIVATE */ 222893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length) 223893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 224893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int need_crc = 1; 225893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 226893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr->chunk_name[0] & 0x20) /* ancillary */ 227893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 228893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == 229893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) 230893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project need_crc = 0; 231893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 232893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else /* critical */ 233893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 234893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) 235893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project need_crc = 0; 236893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 237893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 238893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (need_crc) 239893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length); 240893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 241893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 242893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Allocate the memory for an info_struct for the application. We don't 243893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * really need the png_ptr, but it could potentially be useful in the 244893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * future. This should be used in favour of malloc(png_sizeof(png_info)) 245893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * and png_info_init() so that applications that want to use a shared 246893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * libpng don't have to be recompiled if png_info changes size. 247893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 248893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_infop PNGAPI 249893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_create_info_struct(png_structp png_ptr) 250893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 251893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_infop info_ptr; 252893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 2534215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in png_create_info_struct"); 2545f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 255a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 256a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return (NULL); 2575f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 258893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_USER_MEM_SUPPORTED 259893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO, 260893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->malloc_fn, png_ptr->mem_ptr); 261893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 262893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); 263893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 264893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (info_ptr != NULL) 265893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_info_init_3(&info_ptr, png_sizeof(png_info)); 266893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 267893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (info_ptr); 268893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 269893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 270893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This function frees the memory associated with a single info struct. 271893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * Normally, one would use either png_destroy_read_struct() or 272893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * png_destroy_write_struct() to free an info struct, but this may be 273893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * useful for some applications. 274893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 275893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 276893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr) 277893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 278893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_infop info_ptr = NULL; 2795f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 2805f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_debug(1, "in png_destroy_info_struct"); 2815f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 282a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 283a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return; 284893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 285893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (info_ptr_ptr != NULL) 286893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr = *info_ptr_ptr; 287893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 288893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (info_ptr != NULL) 289893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 290893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_info_destroy(png_ptr, info_ptr); 291893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 292893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_USER_MEM_SUPPORTED 293893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn, 294893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->mem_ptr); 295893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 296893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_destroy_struct((png_voidp)info_ptr); 297893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 298893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project *info_ptr_ptr = NULL; 299893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 300893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 301893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 302893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Initialize the info structure. This is now an internal function (0.89) 303893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * and applications using it are urged to use png_create_info_struct() 304893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * instead. 305893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 306893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_1_0_X) || defined(PNG_1_2_X) 307893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#undef png_info_init 308893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 309893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_info_init(png_infop info_ptr) 310893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 311893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* We only come here via pre-1.0.12-compiled applications */ 312893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_info_init_3(&info_ptr, 0); 313893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 314893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 315893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 316893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 317893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size) 318893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 319893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_infop info_ptr = *ptr_ptr; 320893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 3215f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_debug(1, "in png_info_init_3"); 3225f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 323a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr == NULL) 324a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return; 325893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 3264215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (png_sizeof(png_info) > png_info_struct_size) 327a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 328a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_destroy_struct(info_ptr); 329a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); 330a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott *ptr_ptr = info_ptr; 331a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 332893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 333a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Set everything to 0 */ 3344215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_memset(info_ptr, 0, png_sizeof(png_info)); 335893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 336893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 337893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 338893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 339893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_data_freer(png_structp png_ptr, png_infop info_ptr, 340893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int freer, png_uint_32 mask) 341893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 3424215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in png_data_freer"); 3435f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 344893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr == NULL || info_ptr == NULL) 345893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return; 3465f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 3474215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (freer == PNG_DESTROY_WILL_FREE_DATA) 348893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->free_me |= mask; 3494215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project else if (freer == PNG_USER_WILL_FREE_DATA) 350893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->free_me &= ~mask; 351893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 352893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_warning(png_ptr, 353893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project "Unknown freer parameter in png_data_freer."); 354893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 355893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 356893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 357893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 358893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, 359893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int num) 360893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 3614215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in png_free_data"); 3625f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 363893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr == NULL || info_ptr == NULL) 364893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return; 365893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 3665f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_TEXT_SUPPORTED 367a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free text item num or (if num == -1) all text items */ 368893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 369a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_TEXT) & info_ptr->free_me) 370893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 371a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_TEXT) 372893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 373893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 374a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (num != -1) 375a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 376a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->text && info_ptr->text[num].key) 377a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 378a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->text[num].key); 379a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->text[num].key = NULL; 380a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 381a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 382a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott else 383a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 384a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott int i; 385a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott for (i = 0; i < info_ptr->num_text; i++) 386a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i); 387a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->text); 388a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->text = NULL; 389a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->num_text=0; 390a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 391893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 392893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 393893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 3945f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_tRNS_SUPPORTED 395a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any tRNS entry */ 396893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 397a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_TRNS) & info_ptr->free_me) 398893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 399a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS)) 400893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 401a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 402a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->trans); 403a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->trans = NULL; 404a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_tRNS; 405893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef PNG_FREE_ME_SUPPORTED 406a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr->flags &= ~PNG_FLAG_FREE_TRNS; 407893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 408a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 409893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 410893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 4115f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_sCAL_SUPPORTED 412a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any sCAL entry */ 413893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 414a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_SCAL) & info_ptr->free_me) 415893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 416a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_SCAL) 417893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 418a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 419893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED) 420a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->scal_s_width); 421a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->scal_s_height); 422a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->scal_s_width = NULL; 423a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->scal_s_height = NULL; 424893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 425a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_sCAL; 426a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 427893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 428893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 4295f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_pCAL_SUPPORTED 430a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any pCAL entry */ 431893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 432a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_PCAL) & info_ptr->free_me) 433893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 434a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_PCAL) 435893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 436a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 437a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->pcal_purpose); 438a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->pcal_units); 439a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->pcal_purpose = NULL; 440a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->pcal_units = NULL; 441a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->pcal_params != NULL) 442a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 443a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott int i; 444a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott for (i = 0; i < (int)info_ptr->pcal_nparams; i++) 445a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 446a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->pcal_params[i]); 4475f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott info_ptr->pcal_params[i] = NULL; 448a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 449a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->pcal_params); 450a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->pcal_params = NULL; 451a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 452a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_pCAL; 453a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 454893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 455893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 4565f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_iCCP_SUPPORTED 457a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any iCCP entry */ 458893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 459a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_ICCP) & info_ptr->free_me) 460893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 461a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_ICCP) 462893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 463a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 464a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->iccp_name); 465a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->iccp_profile); 466a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->iccp_name = NULL; 467a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->iccp_profile = NULL; 468a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_iCCP; 469a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 470893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 471893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 4725f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_sPLT_SUPPORTED 473a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free a given sPLT entry, or (if num == -1) all sPLT entries */ 474893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 475a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_SPLT) & info_ptr->free_me) 476893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 477a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_SPLT) 478893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 479893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 480a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (num != -1) 481893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 482a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->splt_palettes) 483a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 484a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->splt_palettes[num].name); 485a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->splt_palettes[num].entries); 486a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->splt_palettes[num].name = NULL; 487a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->splt_palettes[num].entries = NULL; 488a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 489a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 490a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott else 491a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 492a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->splt_palettes_num) 493a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 494a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott int i; 495a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) 496a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i); 497a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott 498a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->splt_palettes); 499a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->splt_palettes = NULL; 500a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->splt_palettes_num = 0; 501a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 502a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_sPLT; 503893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 504893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 505893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 506893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 5075f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED 508a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr->unknown_chunk.data) 509a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 510a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, png_ptr->unknown_chunk.data); 511a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr->unknown_chunk.data = NULL; 512a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 5134215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 514893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 515a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_UNKN) & info_ptr->free_me) 516893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 517a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_UNKN) 518893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 519893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 520a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (num != -1) 521a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 522a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->unknown_chunks) 523a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 524a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->unknown_chunks[num].data); 525a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->unknown_chunks[num].data = NULL; 526a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 527a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 528a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott else 529a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 530a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott int i; 531893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 532a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->unknown_chunks_num) 533a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 534a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++) 535a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i); 536893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 537a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->unknown_chunks); 538a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->unknown_chunks = NULL; 539a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->unknown_chunks_num = 0; 540a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 541a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 542893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 543893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 544893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 5455f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_hIST_SUPPORTED 546a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any hIST entry */ 547893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 548a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_HIST) & info_ptr->free_me) 549893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 550a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST)) 551893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 552a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 553a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->hist); 554a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->hist = NULL; 555a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_hIST; 556893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef PNG_FREE_ME_SUPPORTED 557a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr->flags &= ~PNG_FLAG_FREE_HIST; 558893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 559a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 560893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 561893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 562a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any PLTE entry that was internally allocated */ 563893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 564a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_PLTE) & info_ptr->free_me) 565893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 566a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE)) 567893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 568a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 569a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_zfree(png_ptr, info_ptr->palette); 570a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->palette = NULL; 571a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_PLTE; 572893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef PNG_FREE_ME_SUPPORTED 573a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr->flags &= ~PNG_FLAG_FREE_PLTE; 574893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 575a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->num_palette = 0; 576a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 577893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 5785f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_INFO_IMAGE_SUPPORTED 579a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any image bits attached to the info structure */ 580893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 581a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_ROWS) & info_ptr->free_me) 582893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 583a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_ROWS) 584893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 585a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 586a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->row_pointers) 587a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 588a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott int row; 589a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott for (row = 0; row < (int)info_ptr->height; row++) 590a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 591a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->row_pointers[row]); 5925f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott info_ptr->row_pointers[row] = NULL; 593a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 594a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->row_pointers); 5955f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott info_ptr->row_pointers = NULL; 596a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 597a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_IDAT; 598a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 599893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 600893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 601893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 6024215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (num == -1) 603a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->free_me &= ~mask; 604893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 605a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL); 606893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 607893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 608893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 609893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This is an internal routine to free any memory that the info struct is 610893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * pointing to before re-using it or freeing the struct itself. Recall 611893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * that png_free() checks for NULL pointers for us. 612893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 613893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid /* PRIVATE */ 614893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_info_destroy(png_structp png_ptr, png_infop info_ptr) 615893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 6164215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in png_info_destroy"); 617893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 618893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); 619893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 6205f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED 621893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr->num_chunk_list) 622893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 623a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, png_ptr->chunk_list); 6245f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_ptr->chunk_list = NULL; 625a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr->num_chunk_list = 0; 626893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 627893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 628893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 629893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_info_init_3(&info_ptr, png_sizeof(png_info)); 630893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 631893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ 632893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 633893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This function returns a pointer to the io_ptr associated with the user 634893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * functions. The application should free any memory associated with this 635893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * pointer before png_write_destroy() or png_read_destroy() are called. 636893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 637893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_voidp PNGAPI 638893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_io_ptr(png_structp png_ptr) 639893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 640a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 641a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return (NULL); 642893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (png_ptr->io_ptr); 643893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 644893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 645893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 6465f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_STDIO_SUPPORTED 647893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Initialize the default input/output functions for the PNG file. If you 648893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * use your own read or write routines, you can call either png_set_read_fn() 649893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * or png_set_write_fn() instead of png_init_io(). If you have defined 650893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't 651893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * necessarily available. 652893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 653893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 654893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_init_io(png_structp png_ptr, png_FILE_p fp) 655893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 6564215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in png_init_io"); 6575f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 658a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 659a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return; 6605f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 661893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->io_ptr = (png_voidp)fp; 662893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 663893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 664893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 6655f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_TIME_RFC1123_SUPPORTED 666893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Convert the supplied time into an RFC 1123 string suitable for use in 667893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * a "Creation Time" or other text-based time string. 668893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 669893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 670893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_convert_to_rfc1123(png_structp png_ptr, png_timep ptime) 671893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 672893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project static PNG_CONST char short_months[12][4] = 673893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project {"Jan", "Feb", "Mar", "Apr", "May", "Jun", 674893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; 675893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 676a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 677a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return (NULL); 678893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr->time_buffer == NULL) 679893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 680893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29* 681893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_sizeof(char))); 682893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 683893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 6845f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef _WIN32_WCE 685893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 686893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project wchar_t time_buf[29]; 687893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project wsprintf(time_buf, TEXT("%d %S %d %02d:%02d:%02d +0000"), 688893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->day % 32, short_months[(ptime->month - 1) % 12], 689893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->year, ptime->hour % 24, ptime->minute % 60, 690893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->second % 61); 6915f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott WideCharToMultiByte(CP_ACP, 0, time_buf, -1, png_ptr->time_buffer, 6925f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 29, NULL, NULL); 693893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 694893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 695893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef USE_FAR_KEYWORD 696893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 697893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project char near_time_buf[29]; 6984215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_snprintf6(near_time_buf, 29, "%d %s %d %02d:%02d:%02d +0000", 699893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->day % 32, short_months[(ptime->month - 1) % 12], 700893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->year, ptime->hour % 24, ptime->minute % 60, 701893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->second % 61); 702893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_memcpy(png_ptr->time_buffer, near_time_buf, 703893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 29*png_sizeof(char)); 704893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 705893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 7064215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_snprintf6(png_ptr->time_buffer, 29, "%d %s %d %02d:%02d:%02d +0000", 707893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->day % 32, short_months[(ptime->month - 1) % 12], 708893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->year, ptime->hour % 24, ptime->minute % 60, 709893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->second % 61); 710893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 711893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* _WIN32_WCE */ 712893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_charp)png_ptr->time_buffer); 713893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 714893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_TIME_RFC1123_SUPPORTED */ 715893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 716893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ 717893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 718893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 719893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_copyright(png_structp png_ptr) 720893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 721a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ 7225f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_STRING_COPYRIGHT 7235f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott return PNG_STRING_COPYRIGHT 7245f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#else 7255f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef __STDC__ 7265f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott return ((png_charp) PNG_STRING_NEWLINE \ 72766dce0da6a5db51ee0c2875517d3a6ca6cbbe53dEric Vannier "libpng version 1.2.46 - July 9, 2011" PNG_STRING_NEWLINE \ 72866dce0da6a5db51ee0c2875517d3a6ca6cbbe53dEric Vannier "Copyright (c) 1998-2011 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \ 7295f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \ 7305f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \ 7315f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott PNG_STRING_NEWLINE); 7325f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#else 73366dce0da6a5db51ee0c2875517d3a6ca6cbbe53dEric Vannier return ((png_charp) "libpng version 1.2.46 - July 9, 2011\ 73466dce0da6a5db51ee0c2875517d3a6ca6cbbe53dEric Vannier Copyright (c) 1998-2011 Glenn Randers-Pehrson\ 7355f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott Copyright (c) 1996-1997 Andreas Dilger\ 7365f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc."); 7375f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#endif 7385f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#endif 739893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 740893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 741893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* The following return the library version as a short string in the 742893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * format 1.0.0 through 99.99.99zz. To get the version of *.h files 743893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * used with your application, print out PNG_LIBPNG_VER_STRING, which 744893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * is defined in png.h. 745893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * Note: now there is no difference between png_get_libpng_ver() and 746893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * png_get_header_ver(). Due to the version_nn_nn_nn typedef guard, 747893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * it is guaranteed that png.c uses the correct version of png.h. 748893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 749893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 750893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_libpng_ver(png_structp png_ptr) 751893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 752893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* Version of *.c files used when building libpng */ 753a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ 754893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_charp) PNG_LIBPNG_VER_STRING); 755893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 756893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 757893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 758893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_header_ver(png_structp png_ptr) 759893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 760893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* Version of *.h files used when building libpng */ 761a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ 762893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_charp) PNG_LIBPNG_VER_STRING); 763893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 764893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 765893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 766893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_header_version(png_structp png_ptr) 767893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 768893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* Returns longer string containing both version and date */ 769a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ 7705f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef __STDC__ 771893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_charp) PNG_HEADER_VERSION_STRING 772893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef PNG_READ_SUPPORTED 773893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project " (NO READ SUPPORT)" 774893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 7755f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott PNG_STRING_NEWLINE); 7765f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#else 7775f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott return ((png_charp) PNG_HEADER_VERSION_STRING); 7785f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#endif 779893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 780893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 781893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 782893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED 783893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 784893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name) 785893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 786a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Check chunk_name and return "keep" value if it's on the list, else 0 */ 787893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int i; 788893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_bytep p; 7894215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0) 790893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return 0; 7914215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project p = png_ptr->chunk_list + png_ptr->num_chunk_list*5 - 5; 7924215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project for (i = png_ptr->num_chunk_list; i; i--, p -= 5) 793893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (!png_memcmp(chunk_name, p, 4)) 7944215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project return ((int)*(p + 4)); 795893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return 0; 796893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 797893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 798893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 799893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This function, added to libpng-1.0.6g, is untested. */ 800893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 801893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_reset_zstream(png_structp png_ptr) 802893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 803a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 804a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return Z_STREAM_ERROR; 805893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (inflateReset(&png_ptr->zstream)); 806893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 807893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ 808893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 809893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This function was added to libpng-1.0.7 */ 810893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_uint_32 PNGAPI 811893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_access_version_number(void) 812893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 813893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* Version of *.c files used when building libpng */ 814893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return((png_uint_32) PNG_LIBPNG_VER); 815893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 816893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 817893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 818893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) && defined(PNG_ASSEMBLER_CODE_SUPPORTED) 8195f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifndef PNG_1_0_X 820a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* This function was added to libpng 1.2.0 */ 821893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 822893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_mmx_support(void) 823893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 824a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Obsolete, to be removed from libpng-1.4.0 */ 825893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return -1; 826893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 827893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_1_0_X */ 828893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_READ_SUPPORTED && PNG_ASSEMBLER_CODE_SUPPORTED */ 829893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 830893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 831893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_SIZE_T 832893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Added at libpng version 1.2.6 */ 833893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size)); 834893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_size_t PNGAPI 835893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_convert_size(size_t size) 836893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 837a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (size > (png_size_t)-1) 838a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */ 839a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return ((png_size_t)size); 840893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 841893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_SIZE_T */ 8424215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 8434215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project/* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */ 8445f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_cHRM_SUPPORTED 8455f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_CHECK_cHRM_SUPPORTED 846a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott 8474215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project/* 848a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * Multiply two 32-bit numbers, V1 and V2, using 32-bit 849a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * arithmetic, to produce a 64 bit result in the HI/LO words. 850a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * 851a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * A B 852a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * x C D 853a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * ------ 854a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * AD || BD 855a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * AC || CB || 0 856a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * 857a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * where A and B are the high and low 16-bit words of V1, 858a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * C and D are the 16-bit words of V2, AD is the product of 859a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * A and D, and X || Y is (X << 16) + Y. 8604215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project*/ 8614215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 8625f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scottvoid /* PRIVATE */ 8635f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scottpng_64bit_product (long v1, long v2, unsigned long *hi_product, 8644215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project unsigned long *lo_product) 8654215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project{ 866a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott int a, b, c, d; 867a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott long lo, hi, x, y; 8684215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 869a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott a = (v1 >> 16) & 0xffff; 870a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott b = v1 & 0xffff; 871a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott c = (v2 >> 16) & 0xffff; 872a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott d = v2 & 0xffff; 8734215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 874a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott lo = b * d; /* BD */ 875a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott x = a * d + c * b; /* AD + CB */ 876a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott y = ((lo >> 16) & 0xffff) + x; 8774215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 878a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott lo = (lo & 0xffff) | ((y & 0xffff) << 16); 879a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott hi = (y >> 16) & 0xffff; 8804215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 881a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott hi += a * c; /* AC */ 8824215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 883a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott *hi_product = (unsigned long)hi; 884a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott *lo_product = (unsigned long)lo; 8854215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project} 886a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott 8875f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scottint /* PRIVATE */ 8884215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Projectpng_check_cHRM_fixed(png_structp png_ptr, 8894215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, 8904215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, 8914215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_fixed_point blue_x, png_fixed_point blue_y) 8924215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project{ 8934215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project int ret = 1; 8944215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project unsigned long xy_hi,xy_lo,yx_hi,yx_lo; 8954215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 8964215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in function png_check_cHRM_fixed"); 8975f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 8984215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (png_ptr == NULL) 8994215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project return 0; 9004215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 9014215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (white_x < 0 || white_y <= 0 || 9024215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project red_x < 0 || red_y < 0 || 9034215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project green_x < 0 || green_y < 0 || 9044215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project blue_x < 0 || blue_y < 0) 9054215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 9064215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, 9074215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project "Ignoring attempt to set negative chromaticity value"); 9084215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 9094215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 9104215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (white_x > (png_fixed_point) PNG_UINT_31_MAX || 9114215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project white_y > (png_fixed_point) PNG_UINT_31_MAX || 9124215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project red_x > (png_fixed_point) PNG_UINT_31_MAX || 9134215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project red_y > (png_fixed_point) PNG_UINT_31_MAX || 9144215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project green_x > (png_fixed_point) PNG_UINT_31_MAX || 9154215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project green_y > (png_fixed_point) PNG_UINT_31_MAX || 9164215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project blue_x > (png_fixed_point) PNG_UINT_31_MAX || 9174215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project blue_y > (png_fixed_point) PNG_UINT_31_MAX ) 9184215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 9194215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, 9204215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project "Ignoring attempt to set chromaticity value exceeding 21474.83"); 9214215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 9224215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 9234215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (white_x > 100000L - white_y) 9244215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 9254215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, "Invalid cHRM white point"); 9264215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 9274215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 9284215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (red_x > 100000L - red_y) 9294215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 9304215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, "Invalid cHRM red point"); 9314215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 9324215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 9334215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (green_x > 100000L - green_y) 9344215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 9354215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, "Invalid cHRM green point"); 9364215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 9374215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 9384215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (blue_x > 100000L - blue_y) 9394215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 9404215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, "Invalid cHRM blue point"); 9414215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 9424215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 9434215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 9444215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_64bit_product(green_x - red_x, blue_y - red_y, &xy_hi, &xy_lo); 9454215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_64bit_product(green_y - red_y, blue_x - red_x, &yx_hi, &yx_lo); 9464215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 9474215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (xy_hi == yx_hi && xy_lo == yx_lo) 9484215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 9494215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, 9504215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project "Ignoring attempt to set cHRM RGB triangle with zero area"); 9514215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 9524215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 9534215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 9544215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project return ret; 9554215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project} 9565f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#endif /* PNG_CHECK_cHRM_SUPPORTED */ 9574215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project#endif /* PNG_cHRM_SUPPORTED */ 9585f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 9595f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scottvoid /* PRIVATE */ 9605f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scottpng_check_IHDR(png_structp png_ptr, 9615f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_uint_32 width, png_uint_32 height, int bit_depth, 9625f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott int color_type, int interlace_type, int compression_type, 9635f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott int filter_type) 9645f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott{ 9655f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott int error = 0; 9665f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 9675f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott /* Check for width and height valid values */ 9685f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (width == 0) 9695f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 9705f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Image width is zero in IHDR"); 9715f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 9725f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 9735f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 9745f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (height == 0) 9755f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 9765f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Image height is zero in IHDR"); 9775f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 9785f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 9795f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 9805f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_SET_USER_LIMITS_SUPPORTED 9815f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (width > png_ptr->user_width_max || width > PNG_USER_WIDTH_MAX) 9825f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#else 9835f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (width > PNG_USER_WIDTH_MAX) 9845f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#endif 9855f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 9865f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Image width exceeds user limit in IHDR"); 9875f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 9885f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 9895f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 9905f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_SET_USER_LIMITS_SUPPORTED 9915f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (height > png_ptr->user_height_max || height > PNG_USER_HEIGHT_MAX) 9925f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#else 9935f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (height > PNG_USER_HEIGHT_MAX) 9945f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#endif 9955f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 9965f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Image height exceeds user limit in IHDR"); 9975f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 9985f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 9995f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 10005f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (width > PNG_UINT_31_MAX) 10015f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 10025f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Invalid image width in IHDR"); 10035f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 10045f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 10055f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 10065f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if ( height > PNG_UINT_31_MAX) 10075f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 10085f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Invalid image height in IHDR"); 10095f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 10105f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 10115f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 10125f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if ( width > (PNG_UINT_32_MAX 10135f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott >> 3) /* 8-byte RGBA pixels */ 10145f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott - 64 /* bigrowbuf hack */ 10155f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott - 1 /* filter byte */ 10165f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott - 7*8 /* rounding of width to multiple of 8 pixels */ 10175f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott - 8) /* extra max_pixel_depth pad */ 10185f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Width is too large for libpng to process pixels"); 10195f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 10205f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott /* Check other values */ 10215f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 && 10225f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott bit_depth != 8 && bit_depth != 16) 10235f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 10245f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Invalid bit depth in IHDR"); 10255f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 10265f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 10275f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 10285f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (color_type < 0 || color_type == 1 || 10295f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott color_type == 5 || color_type > 6) 10305f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 10315f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Invalid color type in IHDR"); 10325f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 10335f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 10345f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 10355f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) || 10365f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott ((color_type == PNG_COLOR_TYPE_RGB || 10375f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott color_type == PNG_COLOR_TYPE_GRAY_ALPHA || 10385f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8)) 10395f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 10405f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Invalid color type/bit depth combination in IHDR"); 10415f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 10425f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 10435f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 10445f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (interlace_type >= PNG_INTERLACE_LAST) 10455f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 10465f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Unknown interlace method in IHDR"); 10475f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 10485f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 10495f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 10505f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (compression_type != PNG_COMPRESSION_TYPE_BASE) 10515f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 10525f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Unknown compression method in IHDR"); 10535f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 10545f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 10555f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 10565f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#ifdef PNG_MNG_FEATURES_SUPPORTED 10575f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott /* Accept filter_method 64 (intrapixel differencing) only if 10585f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and 10595f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott * 2. Libpng did not read a PNG signature (this filter_method is only 10605f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott * used in PNG datastreams that are embedded in MNG datastreams) and 10615f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott * 3. The application called png_permit_mng_features with a mask that 10625f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott * included PNG_FLAG_MNG_FILTER_64 and 10635f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott * 4. The filter_method is 64 and 10645f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott * 5. The color_type is RGB or RGBA 10655f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott */ 10665f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) && 10675f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_ptr->mng_features_permitted) 10685f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "MNG features are not allowed in a PNG datastream"); 10695f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 10705f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (filter_type != PNG_FILTER_TYPE_BASE) 10715f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 10725f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && 10735f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott (filter_type == PNG_INTRAPIXEL_DIFFERENCING) && 10745f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott ((png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) == 0) && 10755f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott (color_type == PNG_COLOR_TYPE_RGB || 10765f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott color_type == PNG_COLOR_TYPE_RGB_ALPHA))) 10775f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 10785f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Unknown filter method in IHDR"); 10795f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 10805f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 10815f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 10825f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (png_ptr->mode & PNG_HAVE_PNG_SIGNATURE) 10835f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 10845f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Invalid filter method in IHDR"); 10855f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 10865f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 10875f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 10885f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 10895f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#else 10905f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (filter_type != PNG_FILTER_TYPE_BASE) 10915f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott { 10925f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_warning(png_ptr, "Unknown filter method in IHDR"); 10935f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott error = 1; 10945f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott } 10955f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott#endif 10965f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott 10975f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott if (error == 1) 10985f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott png_error(png_ptr, "Invalid IHDR data"); 10995f6bd84e375226bf228fc8ac90318957ec9e1e7fPatrick Scott} 1100893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ 1101