png.c revision 893912bfc2683463dc3e2c445336752d012563d3
1893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 2893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* png.c - location for general purpose libpng functions 3893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * 4893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * Last changed in libpng 1.2.21 October 4, 2007 5893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * For conditions of distribution and use, see copyright notice in png.h 6893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * Copyright (c) 1998-2007 Glenn Randers-Pehrson 7893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) 8893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) 9893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 10893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 11893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#define PNG_INTERNAL 12893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#define PNG_NO_EXTERN 13893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#include "png.h" 14893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 15893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Generate a compiler error if there is an old png.h in the search path. */ 16893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projecttypedef version_1_2_29 Your_png_h_is_not_version_1_2_29; 17893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 18893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Version information for C files. This had better match the version 19893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * string defined in png.h. */ 20893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 21893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_USE_GLOBAL_ARRAYS 22893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* png_libpng_ver was changed to a function in version 1.0.5c */ 23893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST char png_libpng_ver[18] = PNG_LIBPNG_VER_STRING; 24893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 25893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_READ_SUPPORTED 26893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 27893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* png_sig was changed to a function in version 1.0.5c */ 28893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Place to hold the signature string for a PNG file. */ 29893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10}; 30893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_READ_SUPPORTED */ 31893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 32893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Invoke global declarations for constant strings for known chunk types */ 33893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_IHDR; 34893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_IDAT; 35893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_IEND; 36893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_PLTE; 37893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_bKGD; 38893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_cHRM; 39893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_gAMA; 40893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_hIST; 41893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_iCCP; 42893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_iTXt; 43893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_oFFs; 44893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_pCAL; 45893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_sCAL; 46893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_pHYs; 47893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_sBIT; 48893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_sPLT; 49893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_sRGB; 50893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_tEXt; 51893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_tIME; 52893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_tRNS; 53893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_zTXt; 54893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 55893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_READ_SUPPORTED 56893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* arrays to facilitate easy interlacing - use pass (0 - 6) as index */ 57893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 58893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* start of interlace block */ 59893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; 60893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 61893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* offset to next interlace block */ 62893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; 63893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 64893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* start of interlace block in the y direction */ 65893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; 66893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 67893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* offset to next interlace block in the y direction */ 68893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; 69893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 70893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Height of interlace block. This is not currently used - if you need 71893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * it, uncomment it here and in png.h 72893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; 73893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project*/ 74893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 75893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Mask to determine which pixels are valid in a pass */ 76893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_mask[] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; 77893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 78893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Mask to determine which pixels to overwrite while displaying */ 79893912bfc2683463dc3e2c445336752d012563d3The Android Open Source ProjectPNG_CONST int FARDATA png_pass_dsp_mask[] 80893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff}; 81893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 82893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_READ_SUPPORTED */ 83893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_USE_GLOBAL_ARRAYS */ 84893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 85893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Tells libpng that we have already handled the first "num_bytes" bytes 86893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * of the PNG file signature. If the PNG data is embedded into another 87893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * stream we can set num_bytes = 8 so that libpng will not attempt to read 88893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * or write any of the magic bytes before it starts on the IHDR. 89893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 90893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 91893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_READ_SUPPORTED 92893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 93893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_set_sig_bytes(png_structp png_ptr, int num_bytes) 94893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 95893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(png_ptr == NULL) return; 96893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_debug(1, "in png_set_sig_bytes\n"); 97893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (num_bytes > 8) 98893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_error(png_ptr, "Too many bytes for PNG signature."); 99893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 100893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes); 101893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 102893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 103893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Checks whether the supplied bytes match the PNG signature. We allow 104893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * checking less than the full 8-byte signature so that those apps that 105893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * already read the first few bytes of a file to determine the file type 106893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * can simply check the remaining bytes for extra assurance. Returns 107893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * an integer less than, equal to, or greater than zero if sig is found, 108893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * respectively, to be less than, to match, or be greater than the correct 109893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * PNG signature (this is the same behaviour as strcmp, memcmp, etc). 110893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 111893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 112893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check) 113893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 114893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10}; 115893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (num_to_check > 8) 116893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project num_to_check = 8; 117893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if (num_to_check < 1) 118893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (-1); 119893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 120893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (start > 7) 121893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (-1); 122893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 123893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (start + num_to_check > 8) 124893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project num_to_check = 8 - start; 125893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 126893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check))); 127893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 128893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 129893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_1_0_X) || defined(PNG_1_2_X) 130893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* (Obsolete) function to check signature bytes. It does not allow one 131893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * to check a partial signature. This function might be removed in the 132893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * future - use png_sig_cmp(). Returns true (nonzero) if the file is PNG. 133893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 134893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 135893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_check_sig(png_bytep sig, int num) 136893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 137893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num)); 138893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 139893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 140893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_READ_SUPPORTED */ 141893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 142893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 143893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Function to allocate memory for zlib and clear it to 0. */ 144893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_1_0_X 145893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoidpf PNGAPI 146893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 147893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoidpf /* private */ 148893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 149893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_zalloc(voidpf png_ptr, uInt items, uInt size) 150893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 151893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_voidp ptr; 152893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_structp p=(png_structp)png_ptr; 153893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_uint_32 save_flags=p->flags; 154893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_uint_32 num_bytes; 155893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 156893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(png_ptr == NULL) return (NULL); 157893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (items > PNG_UINT_32_MAX/size) 158893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 159893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_warning (p, "Potential overflow in png_zalloc()"); 160893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (NULL); 161893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 162893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project num_bytes = (png_uint_32)items * size; 163893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 164893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; 165893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes); 166893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project p->flags=save_flags; 167893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 168893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_1_0_X) && !defined(PNG_NO_ZALLOC_ZERO) 169893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (ptr == NULL) 170893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((voidpf)ptr); 171893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 172893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (num_bytes > (png_uint_32)0x8000L) 173893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 174893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_memset(ptr, 0, (png_size_t)0x8000L); 175893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_memset((png_bytep)ptr + (png_size_t)0x8000L, 0, 176893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project (png_size_t)(num_bytes - (png_uint_32)0x8000L)); 177893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 178893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 179893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 180893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_memset(ptr, 0, (png_size_t)num_bytes); 181893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 182893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 183893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((voidpf)ptr); 184893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 185893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 186893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* function to free memory for zlib */ 187893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_1_0_X 188893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 189893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 190893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid /* private */ 191893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 192893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_zfree(voidpf png_ptr, voidpf ptr) 193893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 194893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free((png_structp)png_ptr, (png_voidp)ptr); 195893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 196893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 197893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Reset the CRC variable to 32 bits of 1's. Care must be taken 198893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * in case CRC is > 32 bits to leave the top bits 0. 199893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 200893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid /* PRIVATE */ 201893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_reset_crc(png_structp png_ptr) 202893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 203893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->crc = crc32(0, Z_NULL, 0); 204893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 205893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 206893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Calculate the CRC over a section of data. We can only pass as 207893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * much data to this routine as the largest single buffer size. We 208893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * also check that this data will actually be used before going to the 209893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * trouble of calculating it. 210893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 211893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid /* PRIVATE */ 212893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length) 213893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 214893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int need_crc = 1; 215893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 216893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr->chunk_name[0] & 0x20) /* ancillary */ 217893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 218893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == 219893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) 220893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project need_crc = 0; 221893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 222893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else /* critical */ 223893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 224893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) 225893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project need_crc = 0; 226893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 227893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 228893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (need_crc) 229893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length); 230893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 231893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 232893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Allocate the memory for an info_struct for the application. We don't 233893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * really need the png_ptr, but it could potentially be useful in the 234893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * future. This should be used in favour of malloc(png_sizeof(png_info)) 235893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * and png_info_init() so that applications that want to use a shared 236893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * libpng don't have to be recompiled if png_info changes size. 237893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 238893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_infop PNGAPI 239893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_create_info_struct(png_structp png_ptr) 240893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 241893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_infop info_ptr; 242893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 243893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_debug(1, "in png_create_info_struct\n"); 244893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(png_ptr == NULL) return (NULL); 245893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_USER_MEM_SUPPORTED 246893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO, 247893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->malloc_fn, png_ptr->mem_ptr); 248893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 249893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); 250893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 251893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (info_ptr != NULL) 252893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_info_init_3(&info_ptr, png_sizeof(png_info)); 253893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 254893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (info_ptr); 255893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 256893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 257893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This function frees the memory associated with a single info struct. 258893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * Normally, one would use either png_destroy_read_struct() or 259893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * png_destroy_write_struct() to free an info struct, but this may be 260893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * useful for some applications. 261893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 262893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 263893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr) 264893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 265893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_infop info_ptr = NULL; 266893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(png_ptr == NULL) return; 267893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 268893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_debug(1, "in png_destroy_info_struct\n"); 269893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (info_ptr_ptr != NULL) 270893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr = *info_ptr_ptr; 271893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 272893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (info_ptr != NULL) 273893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 274893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_info_destroy(png_ptr, info_ptr); 275893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 276893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_USER_MEM_SUPPORTED 277893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn, 278893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->mem_ptr); 279893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 280893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_destroy_struct((png_voidp)info_ptr); 281893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 282893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project *info_ptr_ptr = NULL; 283893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 284893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 285893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 286893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Initialize the info structure. This is now an internal function (0.89) 287893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * and applications using it are urged to use png_create_info_struct() 288893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * instead. 289893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 290893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_1_0_X) || defined(PNG_1_2_X) 291893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#undef png_info_init 292893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 293893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_info_init(png_infop info_ptr) 294893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 295893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* We only come here via pre-1.0.12-compiled applications */ 296893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_info_init_3(&info_ptr, 0); 297893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 298893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 299893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 300893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 301893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size) 302893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 303893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_infop info_ptr = *ptr_ptr; 304893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 305893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(info_ptr == NULL) return; 306893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 307893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_debug(1, "in png_info_init_3\n"); 308893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 309893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(png_sizeof(png_info) > png_info_struct_size) 310893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 311893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_destroy_struct(info_ptr); 312893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); 313893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project *ptr_ptr = info_ptr; 314893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 315893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 316893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* set everything to 0 */ 317893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_memset(info_ptr, 0, png_sizeof (png_info)); 318893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 319893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 320893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 321893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 322893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_data_freer(png_structp png_ptr, png_infop info_ptr, 323893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int freer, png_uint_32 mask) 324893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 325893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_debug(1, "in png_data_freer\n"); 326893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr == NULL || info_ptr == NULL) 327893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return; 328893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(freer == PNG_DESTROY_WILL_FREE_DATA) 329893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->free_me |= mask; 330893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else if(freer == PNG_USER_WILL_FREE_DATA) 331893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->free_me &= ~mask; 332893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 333893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_warning(png_ptr, 334893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project "Unknown freer parameter in png_data_freer."); 335893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 336893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 337893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 338893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 339893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, 340893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int num) 341893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 342893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_debug(1, "in png_free_data\n"); 343893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr == NULL || info_ptr == NULL) 344893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return; 345893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 346893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_TEXT_SUPPORTED) 347893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* free text item num or (if num == -1) all text items */ 348893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 349893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif ((mask & PNG_FREE_TEXT) & info_ptr->free_me) 350893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 351893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif (mask & PNG_FREE_TEXT) 352893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 353893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 354893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (num != -1) 355893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 356893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (info_ptr->text && info_ptr->text[num].key) 357893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 358893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->text[num].key); 359893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->text[num].key = NULL; 360893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 361893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 362893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 363893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 364893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int i; 365893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project for (i = 0; i < info_ptr->num_text; i++) 366893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i); 367893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->text); 368893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->text = NULL; 369893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->num_text=0; 370893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 371893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 372893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 373893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 374893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_tRNS_SUPPORTED) 375893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* free any tRNS entry */ 376893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 377893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif ((mask & PNG_FREE_TRNS) & info_ptr->free_me) 378893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 379893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS)) 380893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 381893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 382893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->trans); 383893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->valid &= ~PNG_INFO_tRNS; 384893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef PNG_FREE_ME_SUPPORTED 385893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->flags &= ~PNG_FLAG_FREE_TRNS; 386893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 387893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->trans = NULL; 388893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 389893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 390893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 391893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_sCAL_SUPPORTED) 392893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* free any sCAL entry */ 393893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 394893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif ((mask & PNG_FREE_SCAL) & info_ptr->free_me) 395893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 396893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif (mask & PNG_FREE_SCAL) 397893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 398893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 399893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED) 400893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->scal_s_width); 401893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->scal_s_height); 402893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->scal_s_width = NULL; 403893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->scal_s_height = NULL; 404893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 405893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->valid &= ~PNG_INFO_sCAL; 406893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 407893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 408893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 409893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_pCAL_SUPPORTED) 410893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* free any pCAL entry */ 411893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 412893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif ((mask & PNG_FREE_PCAL) & info_ptr->free_me) 413893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 414893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif (mask & PNG_FREE_PCAL) 415893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 416893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 417893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->pcal_purpose); 418893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->pcal_units); 419893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->pcal_purpose = NULL; 420893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->pcal_units = NULL; 421893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (info_ptr->pcal_params != NULL) 422893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 423893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int i; 424893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project for (i = 0; i < (int)info_ptr->pcal_nparams; i++) 425893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 426893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->pcal_params[i]); 427893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->pcal_params[i]=NULL; 428893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 429893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->pcal_params); 430893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->pcal_params = NULL; 431893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 432893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->valid &= ~PNG_INFO_pCAL; 433893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 434893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 435893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 436893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_iCCP_SUPPORTED) 437893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* free any iCCP entry */ 438893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 439893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif ((mask & PNG_FREE_ICCP) & info_ptr->free_me) 440893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 441893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif (mask & PNG_FREE_ICCP) 442893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 443893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 444893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->iccp_name); 445893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->iccp_profile); 446893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->iccp_name = NULL; 447893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->iccp_profile = NULL; 448893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->valid &= ~PNG_INFO_iCCP; 449893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 450893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 451893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 452893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_sPLT_SUPPORTED) 453893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* free a given sPLT entry, or (if num == -1) all sPLT entries */ 454893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 455893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif ((mask & PNG_FREE_SPLT) & info_ptr->free_me) 456893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 457893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif (mask & PNG_FREE_SPLT) 458893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 459893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 460893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (num != -1) 461893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 462893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(info_ptr->splt_palettes) 463893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 464893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->splt_palettes[num].name); 465893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->splt_palettes[num].entries); 466893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->splt_palettes[num].name = NULL; 467893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->splt_palettes[num].entries = NULL; 468893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 469893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 470893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 471893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 472893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(info_ptr->splt_palettes_num) 473893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 474893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int i; 475893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) 476893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i); 477893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 478893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->splt_palettes); 479893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->splt_palettes = NULL; 480893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->splt_palettes_num = 0; 481893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 482893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->valid &= ~PNG_INFO_sPLT; 483893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 484893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 485893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 486893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 487893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) 488893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(png_ptr->unknown_chunk.data) 489893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 490893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, png_ptr->unknown_chunk.data); 491893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->unknown_chunk.data = NULL; 492893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 493893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 494893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif ((mask & PNG_FREE_UNKN) & info_ptr->free_me) 495893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 496893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif (mask & PNG_FREE_UNKN) 497893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 498893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 499893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (num != -1) 500893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 501893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(info_ptr->unknown_chunks) 502893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 503893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->unknown_chunks[num].data); 504893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->unknown_chunks[num].data = NULL; 505893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 506893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 507893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 508893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 509893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int i; 510893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 511893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(info_ptr->unknown_chunks_num) 512893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 513893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++) 514893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i); 515893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 516893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->unknown_chunks); 517893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->unknown_chunks = NULL; 518893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->unknown_chunks_num = 0; 519893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 520893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 521893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 522893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 523893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 524893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_hIST_SUPPORTED) 525893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* free any hIST entry */ 526893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 527893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif ((mask & PNG_FREE_HIST) & info_ptr->free_me) 528893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 529893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST)) 530893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 531893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 532893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->hist); 533893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->hist = NULL; 534893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->valid &= ~PNG_INFO_hIST; 535893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef PNG_FREE_ME_SUPPORTED 536893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->flags &= ~PNG_FLAG_FREE_HIST; 537893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 538893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 539893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 540893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 541893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* free any PLTE entry that was internally allocated */ 542893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 543893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif ((mask & PNG_FREE_PLTE) & info_ptr->free_me) 544893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 545893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE)) 546893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 547893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 548893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_zfree(png_ptr, info_ptr->palette); 549893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->palette = NULL; 550893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->valid &= ~PNG_INFO_PLTE; 551893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef PNG_FREE_ME_SUPPORTED 552893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->flags &= ~PNG_FLAG_FREE_PLTE; 553893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 554893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->num_palette = 0; 555893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 556893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 557893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_INFO_IMAGE_SUPPORTED) 558893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* free any image bits attached to the info structure */ 559893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 560893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif ((mask & PNG_FREE_ROWS) & info_ptr->free_me) 561893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 562893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectif (mask & PNG_FREE_ROWS) 563893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 564893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 565893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(info_ptr->row_pointers) 566893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 567893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int row; 568893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project for (row = 0; row < (int)info_ptr->height; row++) 569893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 570893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->row_pointers[row]); 571893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->row_pointers[row]=NULL; 572893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 573893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, info_ptr->row_pointers); 574893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->row_pointers=NULL; 575893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 576893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->valid &= ~PNG_INFO_IDAT; 577893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 578893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 579893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 580893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_FREE_ME_SUPPORTED 581893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(num == -1) 582893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->free_me &= ~mask; 583893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project else 584893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL); 585893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 586893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 587893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 588893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This is an internal routine to free any memory that the info struct is 589893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * pointing to before re-using it or freeing the struct itself. Recall 590893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * that png_free() checks for NULL pointers for us. 591893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 592893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid /* PRIVATE */ 593893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_info_destroy(png_structp png_ptr, png_infop info_ptr) 594893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 595893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_debug(1, "in png_info_destroy\n"); 596893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 597893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); 598893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 599893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) 600893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr->num_chunk_list) 601893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 602893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_free(png_ptr, png_ptr->chunk_list); 603893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->chunk_list=NULL; 604893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->num_chunk_list=0; 605893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 606893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 607893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 608893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_info_init_3(&info_ptr, png_sizeof(png_info)); 609893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 610893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ 611893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 612893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This function returns a pointer to the io_ptr associated with the user 613893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * functions. The application should free any memory associated with this 614893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * pointer before png_write_destroy() or png_read_destroy() are called. 615893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 616893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_voidp PNGAPI 617893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_io_ptr(png_structp png_ptr) 618893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 619893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(png_ptr == NULL) return (NULL); 620893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (png_ptr->io_ptr); 621893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 622893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 623893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 624893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if !defined(PNG_NO_STDIO) 625893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Initialize the default input/output functions for the PNG file. If you 626893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * use your own read or write routines, you can call either png_set_read_fn() 627893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * or png_set_write_fn() instead of png_init_io(). If you have defined 628893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't 629893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * necessarily available. 630893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 631893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectvoid PNGAPI 632893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_init_io(png_structp png_ptr, png_FILE_p fp) 633893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 634893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_debug(1, "in png_init_io\n"); 635893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(png_ptr == NULL) return; 636893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->io_ptr = (png_voidp)fp; 637893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 638893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 639893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 640893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_TIME_RFC1123_SUPPORTED) 641893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Convert the supplied time into an RFC 1123 string suitable for use in 642893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * a "Creation Time" or other text-based time string. 643893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 644893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 645893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_convert_to_rfc1123(png_structp png_ptr, png_timep ptime) 646893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 647893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project static PNG_CONST char short_months[12][4] = 648893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project {"Jan", "Feb", "Mar", "Apr", "May", "Jun", 649893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; 650893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 651893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(png_ptr == NULL) return (NULL); 652893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr->time_buffer == NULL) 653893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 654893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29* 655893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_sizeof(char))); 656893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 657893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 658893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(_WIN32_WCE) 659893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 660893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project wchar_t time_buf[29]; 661893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project wsprintf(time_buf, TEXT("%d %S %d %02d:%02d:%02d +0000"), 662893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->day % 32, short_months[(ptime->month - 1) % 12], 663893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->year, ptime->hour % 24, ptime->minute % 60, 664893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->second % 61); 665893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project WideCharToMultiByte(CP_ACP, 0, time_buf, -1, png_ptr->time_buffer, 29, 666893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project NULL, NULL); 667893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 668893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 669893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef USE_FAR_KEYWORD 670893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project { 671893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project char near_time_buf[29]; 672893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_snprintf6(near_time_buf,29,"%d %s %d %02d:%02d:%02d +0000", 673893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->day % 32, short_months[(ptime->month - 1) % 12], 674893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->year, ptime->hour % 24, ptime->minute % 60, 675893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->second % 61); 676893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_memcpy(png_ptr->time_buffer, near_time_buf, 677893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 29*png_sizeof(char)); 678893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project } 679893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#else 680893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_snprintf6(png_ptr->time_buffer,29,"%d %s %d %02d:%02d:%02d +0000", 681893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->day % 32, short_months[(ptime->month - 1) % 12], 682893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->year, ptime->hour % 24, ptime->minute % 60, 683893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project ptime->second % 61); 684893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 685893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* _WIN32_WCE */ 686893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_charp)png_ptr->time_buffer); 687893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 688893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_TIME_RFC1123_SUPPORTED */ 689893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 690893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ 691893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 692893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 693893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_copyright(png_structp png_ptr) 694893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 695893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr = png_ptr; /* silence compiler warning about unused png_ptr */ 696893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_charp) "\n libpng version 1.2.29 - May 8, 2008\n\ 697893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project Copyright (c) 1998-2008 Glenn Randers-Pehrson\n\ 698893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project Copyright (c) 1996-1997 Andreas Dilger\n\ 699893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n"); 700893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 701893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 702893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* The following return the library version as a short string in the 703893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * format 1.0.0 through 99.99.99zz. To get the version of *.h files 704893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * used with your application, print out PNG_LIBPNG_VER_STRING, which 705893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * is defined in png.h. 706893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * Note: now there is no difference between png_get_libpng_ver() and 707893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * png_get_header_ver(). Due to the version_nn_nn_nn typedef guard, 708893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project * it is guaranteed that png.c uses the correct version of png.h. 709893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project */ 710893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 711893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_libpng_ver(png_structp png_ptr) 712893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 713893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* Version of *.c files used when building libpng */ 714893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr = png_ptr; /* silence compiler warning about unused png_ptr */ 715893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_charp) PNG_LIBPNG_VER_STRING); 716893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 717893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 718893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 719893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_header_ver(png_structp png_ptr) 720893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 721893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* Version of *.h files used when building libpng */ 722893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr = png_ptr; /* silence compiler warning about unused png_ptr */ 723893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_charp) PNG_LIBPNG_VER_STRING); 724893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 725893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 726893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_charp PNGAPI 727893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_get_header_version(png_structp png_ptr) 728893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 729893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* Returns longer string containing both version and date */ 730893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_ptr = png_ptr; /* silence compiler warning about unused png_ptr */ 731893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_charp) PNG_HEADER_VERSION_STRING 732893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifndef PNG_READ_SUPPORTED 733893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project " (NO READ SUPPORT)" 734893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 735893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project "\n"); 736893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 737893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 738893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 739893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED 740893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 741893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name) 742893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 743893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* check chunk_name and return "keep" value if it's on the list, else 0 */ 744893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project int i; 745893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project png_bytep p; 746893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if(png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0) 747893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return 0; 748893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project p=png_ptr->chunk_list+png_ptr->num_chunk_list*5-5; 749893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project for (i = png_ptr->num_chunk_list; i; i--, p-=5) 750893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (!png_memcmp(chunk_name, p, 4)) 751893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((int)*(p+4)); 752893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return 0; 753893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 754893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif 755893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 756893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This function, added to libpng-1.0.6g, is untested. */ 757893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 758893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_reset_zstream(png_structp png_ptr) 759893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 760893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (png_ptr == NULL) return Z_STREAM_ERROR; 761893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return (inflateReset(&png_ptr->zstream)); 762893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 763893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ 764893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 765893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* This function was added to libpng-1.0.7 */ 766893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_uint_32 PNGAPI 767893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_access_version_number(void) 768893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 769893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* Version of *.c files used when building libpng */ 770893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return((png_uint_32) PNG_LIBPNG_VER); 771893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 772893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 773893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 774893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) && defined(PNG_ASSEMBLER_CODE_SUPPORTED) 775893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if !defined(PNG_1_0_X) 776893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* this function was added to libpng 1.2.0 */ 777893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectint PNGAPI 778893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_mmx_support(void) 779893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 780893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project /* obsolete, to be removed from libpng-1.4.0 */ 781893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return -1; 782893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 783893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_1_0_X */ 784893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_READ_SUPPORTED && PNG_ASSEMBLER_CODE_SUPPORTED */ 785893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project 786893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) 787893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#ifdef PNG_SIZE_T 788893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project/* Added at libpng version 1.2.6 */ 789893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size)); 790893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_size_t PNGAPI 791893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Projectpng_convert_size(size_t size) 792893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project{ 793893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project if (size > (png_size_t)-1) 794893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */ 795893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project return ((png_size_t)size); 796893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project} 797893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* PNG_SIZE_T */ 798893912bfc2683463dc3e2c445336752d012563d3The Android Open Source Project#endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ 799