png.c revision a0bb96c34e65378853ee518bac502842d26c2d1a
1893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 2893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* png.c - location for general purpose libpng functions 3893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * 4a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * Last changed in libpng 1.2.37 [June 4, 2009] 5a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * Copyright (c) 1998-2009 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 16893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#include "png.h" 17893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 18893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Generate a compiler error if there is an old png.h in the search path. */ 19a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scotttypedef version_1_2_38 Your_png_h_is_not_version_1_2_38; 20893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 21893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Version information for C files. This had better match the version 22893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * string defined in png.h. */ 23893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 24893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_USE_GLOBAL_ARRAYS 25893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* png_libpng_ver was changed to a function in version 1.0.5c */ 26893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST char png_libpng_ver[18] = PNG_LIBPNG_VER_STRING; 27893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 28893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_READ_SUPPORTED 29893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 30893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* png_sig was changed to a function in version 1.0.5c */ 31893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Place to hold the signature string for a PNG file. */ 32893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10}; 33893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_READ_SUPPORTED */ 34893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 35893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Invoke global declarations for constant strings for known chunk types */ 36893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_IHDR; 37893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_IDAT; 38893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_IEND; 39893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_PLTE; 40893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_bKGD; 41893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_cHRM; 42893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_gAMA; 43893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_hIST; 44893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_iCCP; 45893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_iTXt; 46893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_oFFs; 47893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_pCAL; 48893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_sCAL; 49893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_pHYs; 50893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_sBIT; 51893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_sPLT; 52893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_sRGB; 53893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_tEXt; 54893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_tIME; 55893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_tRNS; 56893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_zTXt; 57893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 58893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_READ_SUPPORTED 59a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ 60893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 61a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* Start of interlace block */ 62893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; 63893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 64a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* Offset to next interlace block */ 65893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; 66893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 67a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* Start of interlace block in the y direction */ 68893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; 69893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 70a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* Offset to next interlace block in the y direction */ 71893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; 72893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 73893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Height of interlace block. This is not currently used - if you need 74893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * it, uncomment it here and in png.h 75893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; 76893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project*/ 77893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 78893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Mask to determine which pixels are valid in a pass */ 79893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_mask[] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; 80893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 81893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Mask to determine which pixels to overwrite while displaying */ 82893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_dsp_mask[] 83893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff}; 84893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 85893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_READ_SUPPORTED */ 86893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_USE_GLOBAL_ARRAYS */ 87893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 88893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Tells libpng that we have already handled the first "num_bytes" bytes 89893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * of the PNG file signature. If the PNG data is embedded into another 90893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * stream we can set num_bytes = 8 so that libpng will not attempt to read 91893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * or write any of the magic bytes before it starts on the IHDR. 92893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 93893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 94893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_READ_SUPPORTED 95893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 96893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_set_sig_bytes(png_structp png_ptr, int num_bytes) 97893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 98a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 99a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return; 1004215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in png_set_sig_bytes"); 101893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (num_bytes > 8) 102893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_error(png_ptr, "Too many bytes for PNG signature."); 103893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 104893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes); 105893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 106893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 107893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Checks whether the supplied bytes match the PNG signature. We allow 108893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * checking less than the full 8-byte signature so that those apps that 109893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * already read the first few bytes of a file to determine the file type 110893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * can simply check the remaining bytes for extra assurance. Returns 111893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * an integer less than, equal to, or greater than zero if sig is found, 112893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * respectively, to be less than, to match, or be greater than the correct 113893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * PNG signature (this is the same behaviour as strcmp, memcmp, etc). 114893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 115893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 116893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check) 117893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 118893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10}; 119893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (num_to_check > 8) 120893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project num_to_check = 8; 121893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (num_to_check < 1) 122893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (-1); 123893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 124893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (start > 7) 125893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (-1); 126893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 127893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (start + num_to_check > 8) 128893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project num_to_check = 8 - start; 129893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 130893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check))); 131893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 132893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 133893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_1_0_X) || defined(PNG_1_2_X) 134893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* (Obsolete) function to check signature bytes. It does not allow one 135893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * to check a partial signature. This function might be removed in the 136893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * future - use png_sig_cmp(). Returns true (nonzero) if the file is PNG. 137893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 138893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 139893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_check_sig(png_bytep sig, int num) 140893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 141893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num)); 142893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 143893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 144893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_READ_SUPPORTED */ 145893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 146893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 147893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Function to allocate memory for zlib and clear it to 0. */ 148893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_1_0_X 149893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoidpf PNGAPI 150893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 151893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoidpf /* private */ 152893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 153893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_zalloc(voidpf png_ptr, uInt items, uInt size) 154893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 155893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_voidp ptr; 156893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_structp p=(png_structp)png_ptr; 157893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_uint_32 save_flags=p->flags; 158893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_uint_32 num_bytes; 159893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 160a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 161a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return (NULL); 162893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (items > PNG_UINT_32_MAX/size) 163893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 164893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_warning (p, "Potential overflow in png_zalloc()"); 165893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (NULL); 166893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 167893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project num_bytes = (png_uint_32)items * size; 168893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 169893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; 170893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes); 171893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project p->flags=save_flags; 172893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 173893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_1_0_X) && !defined(PNG_NO_ZALLOC_ZERO) 174893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (ptr == NULL) 175893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((voidpf)ptr); 176893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 177893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (num_bytes > (png_uint_32)0x8000L) 178893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 179893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_memset(ptr, 0, (png_size_t)0x8000L); 180893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_memset((png_bytep)ptr + (png_size_t)0x8000L, 0, 181893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project (png_size_t)(num_bytes - (png_uint_32)0x8000L)); 182893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 183893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 184893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 185893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_memset(ptr, 0, (png_size_t)num_bytes); 186893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 187893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 188893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((voidpf)ptr); 189893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 190893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 191a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* Function to free memory for zlib */ 192893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_1_0_X 193893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 194893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 195893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid /* private */ 196893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 197893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_zfree(voidpf png_ptr, voidpf ptr) 198893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 199893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free((png_structp)png_ptr, (png_voidp)ptr); 200893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 201893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 202893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Reset the CRC variable to 32 bits of 1's. Care must be taken 203893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * in case CRC is > 32 bits to leave the top bits 0. 204893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 205893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid /* PRIVATE */ 206893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_reset_crc(png_structp png_ptr) 207893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 208893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->crc = crc32(0, Z_NULL, 0); 209893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 210893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 211893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Calculate the CRC over a section of data. We can only pass as 212893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * much data to this routine as the largest single buffer size. We 213893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * also check that this data will actually be used before going to the 214893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * trouble of calculating it. 215893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 216893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid /* PRIVATE */ 217893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length) 218893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 219893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int need_crc = 1; 220893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 221893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr->chunk_name[0] & 0x20) /* ancillary */ 222893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 223893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == 224893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) 225893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project need_crc = 0; 226893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 227893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else /* critical */ 228893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 229893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) 230893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project need_crc = 0; 231893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 232893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 233893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (need_crc) 234893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length); 235893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 236893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 237893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Allocate the memory for an info_struct for the application. We don't 238893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * really need the png_ptr, but it could potentially be useful in the 239893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * future. This should be used in favour of malloc(png_sizeof(png_info)) 240893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * and png_info_init() so that applications that want to use a shared 241893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * libpng don't have to be recompiled if png_info changes size. 242893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 243893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_infop PNGAPI 244893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_create_info_struct(png_structp png_ptr) 245893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 246893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_infop info_ptr; 247893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 2484215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in png_create_info_struct"); 249a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 250a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return (NULL); 251893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_USER_MEM_SUPPORTED 252893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO, 253893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->malloc_fn, png_ptr->mem_ptr); 254893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 255893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); 256893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 257893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (info_ptr != NULL) 258893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_info_init_3(&info_ptr, png_sizeof(png_info)); 259893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 260893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (info_ptr); 261893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 262893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 263893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This function frees the memory associated with a single info struct. 264893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * Normally, one would use either png_destroy_read_struct() or 265893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * png_destroy_write_struct() to free an info struct, but this may be 266893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * useful for some applications. 267893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 268893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 269893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr) 270893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 271893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_infop info_ptr = NULL; 272a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 273a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return; 274893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 2754215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in png_destroy_info_struct"); 276893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (info_ptr_ptr != NULL) 277893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr = *info_ptr_ptr; 278893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 279893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (info_ptr != NULL) 280893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 281893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_info_destroy(png_ptr, info_ptr); 282893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 283893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_USER_MEM_SUPPORTED 284893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn, 285893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->mem_ptr); 286893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 287893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_destroy_struct((png_voidp)info_ptr); 288893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 289893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project *info_ptr_ptr = NULL; 290893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 291893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 292893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 293893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Initialize the info structure. This is now an internal function (0.89) 294893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * and applications using it are urged to use png_create_info_struct() 295893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * instead. 296893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 297893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_1_0_X) || defined(PNG_1_2_X) 298893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#undef png_info_init 299893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 300893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_info_init(png_infop info_ptr) 301893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 302893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* We only come here via pre-1.0.12-compiled applications */ 303893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_info_init_3(&info_ptr, 0); 304893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 305893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 306893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 307893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 308893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size) 309893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 310893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_infop info_ptr = *ptr_ptr; 311893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 312a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr == NULL) 313a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return; 314893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 3154215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in png_info_init_3"); 316893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 3174215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (png_sizeof(png_info) > png_info_struct_size) 318a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 319a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_destroy_struct(info_ptr); 320a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); 321a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott *ptr_ptr = info_ptr; 322a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 323893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 324a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Set everything to 0 */ 3254215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_memset(info_ptr, 0, png_sizeof(png_info)); 326893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 327893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 328893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 329893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 330893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_data_freer(png_structp png_ptr, png_infop info_ptr, 331893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int freer, png_uint_32 mask) 332893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 3334215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in png_data_freer"); 334893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr == NULL || info_ptr == NULL) 335893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return; 3364215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (freer == PNG_DESTROY_WILL_FREE_DATA) 337893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->free_me |= mask; 3384215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project else if (freer == PNG_USER_WILL_FREE_DATA) 339893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->free_me &= ~mask; 340893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 341893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_warning(png_ptr, 342893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project "Unknown freer parameter in png_data_freer."); 343893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 344893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 345893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 346893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 347893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, 348893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int num) 349893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 3504215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in png_free_data"); 351893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr == NULL || info_ptr == NULL) 352893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return; 353893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 354893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_TEXT_SUPPORTED) 355a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free text item num or (if num == -1) all text items */ 356893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 357a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_TEXT) & info_ptr->free_me) 358893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 359a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_TEXT) 360893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 361893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 362a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (num != -1) 363a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 364a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->text && info_ptr->text[num].key) 365a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 366a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->text[num].key); 367a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->text[num].key = NULL; 368a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 369a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 370a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott else 371a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 372a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott int i; 373a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott for (i = 0; i < info_ptr->num_text; i++) 374a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i); 375a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->text); 376a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->text = NULL; 377a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->num_text=0; 378a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 379893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 380893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 381893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 382893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_tRNS_SUPPORTED) 383a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any tRNS entry */ 384893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 385a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_TRNS) & info_ptr->free_me) 386893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 387a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS)) 388893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 389a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 390a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->trans); 391a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->trans = NULL; 392a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_tRNS; 393893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef PNG_FREE_ME_SUPPORTED 394a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr->flags &= ~PNG_FLAG_FREE_TRNS; 395893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 396a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 397893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 398893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 399893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_sCAL_SUPPORTED) 400a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any sCAL entry */ 401893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 402a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_SCAL) & info_ptr->free_me) 403893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 404a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_SCAL) 405893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 406a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 407893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED) 408a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->scal_s_width); 409a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->scal_s_height); 410a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->scal_s_width = NULL; 411a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->scal_s_height = NULL; 412893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 413a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_sCAL; 414a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 415893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 416893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 417893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_pCAL_SUPPORTED) 418a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any pCAL entry */ 419893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 420a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_PCAL) & info_ptr->free_me) 421893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 422a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_PCAL) 423893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 424a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 425a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->pcal_purpose); 426a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->pcal_units); 427a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->pcal_purpose = NULL; 428a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->pcal_units = NULL; 429a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->pcal_params != NULL) 430a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 431a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott int i; 432a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott for (i = 0; i < (int)info_ptr->pcal_nparams; i++) 433a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 434a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->pcal_params[i]); 435a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->pcal_params[i]=NULL; 436a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 437a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->pcal_params); 438a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->pcal_params = NULL; 439a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 440a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_pCAL; 441a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 442893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 443893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 444893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_iCCP_SUPPORTED) 445a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any iCCP entry */ 446893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 447a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_ICCP) & info_ptr->free_me) 448893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 449a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_ICCP) 450893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 451a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 452a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->iccp_name); 453a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->iccp_profile); 454a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->iccp_name = NULL; 455a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->iccp_profile = NULL; 456a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_iCCP; 457a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 458893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 459893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 460893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_sPLT_SUPPORTED) 461a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free a given sPLT entry, or (if num == -1) all sPLT entries */ 462893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 463a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_SPLT) & info_ptr->free_me) 464893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 465a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_SPLT) 466893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 467893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 468a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (num != -1) 469893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 470a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->splt_palettes) 471a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 472a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->splt_palettes[num].name); 473a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->splt_palettes[num].entries); 474a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->splt_palettes[num].name = NULL; 475a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->splt_palettes[num].entries = NULL; 476a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 477a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 478a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott else 479a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 480a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->splt_palettes_num) 481a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 482a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott int i; 483a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) 484a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i); 485a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott 486a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->splt_palettes); 487a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->splt_palettes = NULL; 488a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->splt_palettes_num = 0; 489a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 490a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_sPLT; 491893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 492893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 493893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 494893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 495893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) 496a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr->unknown_chunk.data) 497a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 498a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, png_ptr->unknown_chunk.data); 499a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr->unknown_chunk.data = NULL; 500a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 5014215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 502893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 503a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_UNKN) & info_ptr->free_me) 504893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 505a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_UNKN) 506893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 507893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 508a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (num != -1) 509a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 510a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->unknown_chunks) 511a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 512a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->unknown_chunks[num].data); 513a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->unknown_chunks[num].data = NULL; 514a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 515a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 516a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott else 517a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 518a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott int i; 519893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 520a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->unknown_chunks_num) 521a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 522a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++) 523a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i); 524893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 525a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->unknown_chunks); 526a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->unknown_chunks = NULL; 527a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->unknown_chunks_num = 0; 528a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 529a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 530893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 531893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 532893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 533893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_hIST_SUPPORTED) 534a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any hIST entry */ 535893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 536a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_HIST) & info_ptr->free_me) 537893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 538a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST)) 539893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 540a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 541a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->hist); 542a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->hist = NULL; 543a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_hIST; 544893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef PNG_FREE_ME_SUPPORTED 545a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr->flags &= ~PNG_FLAG_FREE_HIST; 546893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 547a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 548893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 549893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 550a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any PLTE entry that was internally allocated */ 551893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 552a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_PLTE) & info_ptr->free_me) 553893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 554a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE)) 555893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 556a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 557a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_zfree(png_ptr, info_ptr->palette); 558a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->palette = NULL; 559a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_PLTE; 560893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef PNG_FREE_ME_SUPPORTED 561a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr->flags &= ~PNG_FLAG_FREE_PLTE; 562893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 563a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->num_palette = 0; 564a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 565893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 566893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_INFO_IMAGE_SUPPORTED) 567a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Free any image bits attached to the info structure */ 568893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 569a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if ((mask & PNG_FREE_ROWS) & info_ptr->free_me) 570893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 571a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (mask & PNG_FREE_ROWS) 572893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 573a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 574a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (info_ptr->row_pointers) 575a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 576a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott int row; 577a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott for (row = 0; row < (int)info_ptr->height; row++) 578a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott { 579a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->row_pointers[row]); 580a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->row_pointers[row]=NULL; 581a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 582a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, info_ptr->row_pointers); 583a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->row_pointers=NULL; 584a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 585a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->valid &= ~PNG_INFO_IDAT; 586a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott } 587893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 588893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 589893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 5904215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (num == -1) 591a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->free_me &= ~mask; 592893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 593a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL); 594893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 595893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 596893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 597893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This is an internal routine to free any memory that the info struct is 598893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * pointing to before re-using it or freeing the struct itself. Recall 599893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * that png_free() checks for NULL pointers for us. 600893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 601893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid /* PRIVATE */ 602893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_info_destroy(png_structp png_ptr, png_infop info_ptr) 603893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 6044215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in png_info_destroy"); 605893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 606893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); 607893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 608a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott#if defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) 609893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr->num_chunk_list) 610893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 611a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_free(png_ptr, png_ptr->chunk_list); 612a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr->chunk_list=NULL; 613a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr->num_chunk_list = 0; 614893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 615893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 616893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 617893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_info_init_3(&info_ptr, png_sizeof(png_info)); 618893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 619893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ 620893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 621893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This function returns a pointer to the io_ptr associated with the user 622893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * functions. The application should free any memory associated with this 623893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * pointer before png_write_destroy() or png_read_destroy() are called. 624893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 625893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_voidp PNGAPI 626893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_io_ptr(png_structp png_ptr) 627893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 628a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 629a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return (NULL); 630893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (png_ptr->io_ptr); 631893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 632893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 633893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 634893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if !defined(PNG_NO_STDIO) 635893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Initialize the default input/output functions for the PNG file. If you 636893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * use your own read or write routines, you can call either png_set_read_fn() 637893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * or png_set_write_fn() instead of png_init_io(). If you have defined 638893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't 639893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * necessarily available. 640893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 641893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 642893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_init_io(png_structp png_ptr, png_FILE_p fp) 643893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 6444215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in png_init_io"); 645a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 646a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return; 647893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->io_ptr = (png_voidp)fp; 648893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 649893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 650893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 651893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_TIME_RFC1123_SUPPORTED) 652893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Convert the supplied time into an RFC 1123 string suitable for use in 653893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * a "Creation Time" or other text-based time string. 654893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 655893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 656893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_convert_to_rfc1123(png_structp png_ptr, png_timep ptime) 657893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 658893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project static PNG_CONST char short_months[12][4] = 659893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project {"Jan", "Feb", "Mar", "Apr", "May", "Jun", 660893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; 661893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 662a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 663a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return (NULL); 664893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr->time_buffer == NULL) 665893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 666893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29* 667893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_sizeof(char))); 668893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 669893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 670893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(_WIN32_WCE) 671893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 672893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project wchar_t time_buf[29]; 673893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project wsprintf(time_buf, TEXT("%d %S %d %02d:%02d:%02d +0000"), 674893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->day % 32, short_months[(ptime->month - 1) % 12], 675893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->year, ptime->hour % 24, ptime->minute % 60, 676893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->second % 61); 677893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project WideCharToMultiByte(CP_ACP, 0, time_buf, -1, png_ptr->time_buffer, 29, 678893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project NULL, NULL); 679893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 680893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 681893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef USE_FAR_KEYWORD 682893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 683893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project char near_time_buf[29]; 6844215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_snprintf6(near_time_buf, 29, "%d %s %d %02d:%02d:%02d +0000", 685893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->day % 32, short_months[(ptime->month - 1) % 12], 686893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->year, ptime->hour % 24, ptime->minute % 60, 687893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->second % 61); 688893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_memcpy(png_ptr->time_buffer, near_time_buf, 689893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 29*png_sizeof(char)); 690893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 691893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 6924215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_snprintf6(png_ptr->time_buffer, 29, "%d %s %d %02d:%02d:%02d +0000", 693893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->day % 32, short_months[(ptime->month - 1) % 12], 694893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->year, ptime->hour % 24, ptime->minute % 60, 695893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->second % 61); 696893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 697893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* _WIN32_WCE */ 698893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_charp)png_ptr->time_buffer); 699893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 700893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_TIME_RFC1123_SUPPORTED */ 701893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 702893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ 703893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 704893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 705893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_copyright(png_structp png_ptr) 706893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 707a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ 708a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return ((png_charp) "\n libpng version 1.2.38 - July 16, 2009\n\ 709a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott Copyright (c) 1998-2009 Glenn Randers-Pehrson\n\ 710893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project Copyright (c) 1996-1997 Andreas Dilger\n\ 711893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n"); 712893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 713893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 714893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* The following return the library version as a short string in the 715893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * format 1.0.0 through 99.99.99zz. To get the version of *.h files 716893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * used with your application, print out PNG_LIBPNG_VER_STRING, which 717893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * is defined in png.h. 718893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * Note: now there is no difference between png_get_libpng_ver() and 719893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * png_get_header_ver(). Due to the version_nn_nn_nn typedef guard, 720893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * it is guaranteed that png.c uses the correct version of png.h. 721893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 722893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 723893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_libpng_ver(png_structp png_ptr) 724893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 725893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* Version of *.c files used when building libpng */ 726a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ 727893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_charp) PNG_LIBPNG_VER_STRING); 728893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 729893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 730893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 731893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_header_ver(png_structp png_ptr) 732893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 733893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* Version of *.h files used when building libpng */ 734a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ 735893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_charp) PNG_LIBPNG_VER_STRING); 736893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 737893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 738893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 739893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_header_version(png_structp png_ptr) 740893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 741893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* Returns longer string containing both version and date */ 742a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ 743893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_charp) PNG_HEADER_VERSION_STRING 744893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef PNG_READ_SUPPORTED 745893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project " (NO READ SUPPORT)" 746893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 747893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project "\n"); 748893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 749893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 750893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 751893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED 752893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 753893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name) 754893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 755a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Check chunk_name and return "keep" value if it's on the list, else 0 */ 756893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int i; 757893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_bytep p; 7584215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0) 759893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return 0; 7604215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project p = png_ptr->chunk_list + png_ptr->num_chunk_list*5 - 5; 7614215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project for (i = png_ptr->num_chunk_list; i; i--, p -= 5) 762893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (!png_memcmp(chunk_name, p, 4)) 7634215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project return ((int)*(p + 4)); 764893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return 0; 765893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 766893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 767893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 768893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This function, added to libpng-1.0.6g, is untested. */ 769893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 770893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_reset_zstream(png_structp png_ptr) 771893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 772a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (png_ptr == NULL) 773a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return Z_STREAM_ERROR; 774893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (inflateReset(&png_ptr->zstream)); 775893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 776893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ 777893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 778893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This function was added to libpng-1.0.7 */ 779893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_uint_32 PNGAPI 780893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_access_version_number(void) 781893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 782893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* Version of *.c files used when building libpng */ 783893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return((png_uint_32) PNG_LIBPNG_VER); 784893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 785893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 786893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 787893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) && defined(PNG_ASSEMBLER_CODE_SUPPORTED) 788893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if !defined(PNG_1_0_X) 789a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott/* This function was added to libpng 1.2.0 */ 790893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 791893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_mmx_support(void) 792893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 793a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott /* Obsolete, to be removed from libpng-1.4.0 */ 794893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return -1; 795893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 796893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_1_0_X */ 797893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_READ_SUPPORTED && PNG_ASSEMBLER_CODE_SUPPORTED */ 798893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 799893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 800893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_SIZE_T 801893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Added at libpng version 1.2.6 */ 802893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size)); 803893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_size_t PNGAPI 804893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_convert_size(size_t size) 805893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 806a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott if (size > (png_size_t)-1) 807a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */ 808a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott return ((png_size_t)size); 809893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 810893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_SIZE_T */ 8114215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 8124215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project/* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */ 8134215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project#if defined(PNG_cHRM_SUPPORTED) 8144215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project#if !defined(PNG_NO_CHECK_cHRM) 815a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott 8164215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project/* 817a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * Multiply two 32-bit numbers, V1 and V2, using 32-bit 818a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * arithmetic, to produce a 64 bit result in the HI/LO words. 819a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * 820a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * A B 821a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * x C D 822a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * ------ 823a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * AD || BD 824a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * AC || CB || 0 825a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * 826a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * where A and B are the high and low 16-bit words of V1, 827a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * C and D are the 16-bit words of V2, AD is the product of 828a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott * A and D, and X || Y is (X << 16) + Y. 8294215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project*/ 8304215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 8314215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Projectvoid png_64bit_product (long v1, long v2, unsigned long *hi_product, 8324215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project unsigned long *lo_product) 8334215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project{ 834a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott int a, b, c, d; 835a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott long lo, hi, x, y; 8364215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 837a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott a = (v1 >> 16) & 0xffff; 838a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott b = v1 & 0xffff; 839a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott c = (v2 >> 16) & 0xffff; 840a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott d = v2 & 0xffff; 8414215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 842a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott lo = b * d; /* BD */ 843a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott x = a * d + c * b; /* AD + CB */ 844a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott y = ((lo >> 16) & 0xffff) + x; 8454215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 846a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott lo = (lo & 0xffff) | ((y & 0xffff) << 16); 847a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott hi = (y >> 16) & 0xffff; 8484215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 849a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott hi += a * c; /* AC */ 8504215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 851a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott *hi_product = (unsigned long)hi; 852a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott *lo_product = (unsigned long)lo; 8534215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project} 854a0bb96c34e65378853ee518bac502842d26c2d1aPatrick Scott 8554215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Projectint /* private */ 8564215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Projectpng_check_cHRM_fixed(png_structp png_ptr, 8574215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, 8584215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, 8594215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_fixed_point blue_x, png_fixed_point blue_y) 8604215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project{ 8614215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project int ret = 1; 8624215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project unsigned long xy_hi,xy_lo,yx_hi,yx_lo; 8634215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 8644215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_debug(1, "in function png_check_cHRM_fixed"); 8654215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (png_ptr == NULL) 8664215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project return 0; 8674215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 8684215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (white_x < 0 || white_y <= 0 || 8694215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project red_x < 0 || red_y < 0 || 8704215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project green_x < 0 || green_y < 0 || 8714215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project blue_x < 0 || blue_y < 0) 8724215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 8734215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, 8744215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project "Ignoring attempt to set negative chromaticity value"); 8754215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 8764215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 8774215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (white_x > (png_fixed_point) PNG_UINT_31_MAX || 8784215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project white_y > (png_fixed_point) PNG_UINT_31_MAX || 8794215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project red_x > (png_fixed_point) PNG_UINT_31_MAX || 8804215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project red_y > (png_fixed_point) PNG_UINT_31_MAX || 8814215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project green_x > (png_fixed_point) PNG_UINT_31_MAX || 8824215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project green_y > (png_fixed_point) PNG_UINT_31_MAX || 8834215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project blue_x > (png_fixed_point) PNG_UINT_31_MAX || 8844215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project blue_y > (png_fixed_point) PNG_UINT_31_MAX ) 8854215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 8864215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, 8874215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project "Ignoring attempt to set chromaticity value exceeding 21474.83"); 8884215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 8894215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 8904215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (white_x > 100000L - white_y) 8914215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 8924215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, "Invalid cHRM white point"); 8934215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 8944215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 8954215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (red_x > 100000L - red_y) 8964215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 8974215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, "Invalid cHRM red point"); 8984215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 8994215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 9004215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (green_x > 100000L - green_y) 9014215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 9024215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, "Invalid cHRM green point"); 9034215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 9044215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 9054215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (blue_x > 100000L - blue_y) 9064215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 9074215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, "Invalid cHRM blue point"); 9084215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 9094215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 9104215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 9114215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_64bit_product(green_x - red_x, blue_y - red_y, &xy_hi, &xy_lo); 9124215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_64bit_product(green_y - red_y, blue_x - red_x, &yx_hi, &yx_lo); 9134215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 9144215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project if (xy_hi == yx_hi && xy_lo == yx_lo) 9154215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project { 9164215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project png_warning(png_ptr, 9174215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project "Ignoring attempt to set cHRM RGB triangle with zero area"); 9184215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project ret = 0; 9194215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project } 9204215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project 9214215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project return ret; 9224215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project} 9234215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project#endif /* NO_PNG_CHECK_cHRM */ 9244215dd1533c56e1a89ae6f1d6ea68677fac27fdaThe Android Open Source Project#endif /* PNG_cHRM_SUPPORTED */ 925893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ 926