/* pngpriv.h - private declarations for use inside libpng * * libpng version 1.5.0beta17 - April 17, 2010 * For conditions of distribution and use, see copyright notice in png.h * Copyright (c) 1998-2010 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * * This code is released under the libpng license. * For conditions of distribution and use, see the disclaimer * and license in png.h */ /* The symbols declared in this file (including the functions declared * as PNG_EXTERN) are PRIVATE. They are not part of the libpng public * interface, and are not recommended for use by regular applications. * Some of them may become public in the future; others may stay private, * change in an incompatible way, or even disappear. * Although the libpng users are not forbidden to include this header, * they should be well aware of the issues that may arise from doing so. */ #ifndef PNGPRIV_H #define PNGPRIV_H #define PNGLIB_BUILD #include "png.h" #include "pnginfo.h" #include "pngstruct.h" #include #ifdef BSD # include #else # include #endif /* Added at libpng-1.2.9 */ /* Moved to pngpriv.h at libpng-1.5.0 */ /* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure" * script. We may need it here to get the correct configuration on things * like limits. */ #ifdef PNG_CONFIGURE_LIBPNG # ifdef HAVE_CONFIG_H # include "config.h" # endif #endif /* Moved to pngpriv.h at libpng-1.5.0 */ /* If you are running on a machine where you cannot allocate more * than 64K of memory at once, uncomment this. While libpng will not * normally need that much memory in a chunk (unless you load up a very * large file), zlib needs to know how big of a chunk it can use, and * libpng thus makes sure to check any memory allocation to verify it * will fit into memory. * * zlib provides 'MAXSEG_64K' which, if defined, indicates the * same limit and pngconf.h (already included) sets the limit * if certain operating systems are detected. */ #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) # define PNG_MAX_MALLOC_64K #endif /* Moved to pngpriv.h at libpng-1.5.0 */ /* Feature support: in 1.4 this was in pngconf.h, but these * features have no affect on the libpng API. Add library * only features to the end of this list. Add features that * affect the API to scipts/config.dfn using png_on or png_off * as determined by the default and update scripts/config.std */ /* Added at libpng version 1.4.0 */ #if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED) # define PNG_WARNINGS_SUPPORTED #endif /* Added at libpng version 1.4.0 */ #if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED) # define PNG_CHECK_cHRM_SUPPORTED #endif /* Added at libpng version 1.4.0 */ #if !defined(PNG_NO_ALIGNED_MEMORY) && !defined(PNG_ALIGNED_MEMORY_SUPPORTED) # define PNG_ALIGNED_MEMORY_SUPPORTED #endif /* Buggy compilers (e.g., gcc 2.7.2.2) need PNG_NO_POINTER_INDEXING * See png[wr]util.c */ #if !defined(PNG_NO_POINTER_INDEXING) && \ !defined(PNG_POINTER_INDEXING_SUPPORTED) # define PNG_POINTER_INDEXING_SUPPORTED #endif /* Other defines for things like memory and the like can go here. */ /* This controls how fine the dithering gets. As this allocates * a largish chunk of memory (32K), those who are not as concerned * with dithering quality can decrease some or all of these. */ #ifndef PNG_DITHER_RED_BITS # define PNG_DITHER_RED_BITS 5 #endif #ifndef PNG_DITHER_GREEN_BITS # define PNG_DITHER_GREEN_BITS 5 #endif #ifndef PNG_DITHER_BLUE_BITS # define PNG_DITHER_BLUE_BITS 5 #endif /* This controls how fine the gamma correction becomes when you * are only interested in 8 bits anyway. Increasing this value * results in more memory being used, and more pow() functions * being called to fill in the gamma tables. Don't set this value * less then 8, and even that may not work (I haven't tested it). */ #ifndef PNG_MAX_GAMMA_8 # define PNG_MAX_GAMMA_8 11 #endif /* This controls how much a difference in gamma we can tolerate before * we actually start doing gamma conversion. */ #ifndef PNG_GAMMA_THRESHOLD # define PNG_GAMMA_THRESHOLD 0.05 #endif /* The functions exported by PNG_EXTERN are internal functions, which * aren't usually used outside the library (as far as I know), so it is * debatable if they should be exported at all. In the future, when it * is possible to have run-time registry of chunk-handling functions, * some of these will be made available again. #define PNG_EXTERN extern */ #define PNG_EXTERN /* Other defines specific to compilers can go here. Try to keep * them inside an appropriate ifdef/endif pair for portability. */ #ifdef PNG_FLOATING_POINT_SUPPORTED # if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \ defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC) /* We need to check that hasn't already been included earlier * as it seems it doesn't agree with , yet we should really use * if possible. */ # if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__) # include # endif # else # include # endif # if defined(_AMIGA) && defined(__SASC) && defined(_M68881) /* Amiga SAS/C: We must include builtin FPU functions when compiling using * MATH=68881 */ # include # endif #endif /* This provides the non-ANSI (far) memory allocation routines. */ #if defined(__TURBOC__) && defined(__MSDOS__) # include # include #endif #if defined(WIN32) || defined(_Windows) || defined(_WINDOWS) || \ defined(_WIN32) || defined(__WIN32__) # include /* defines _WINDOWS_ macro */ /* I have no idea why is this necessary... */ # ifdef _MSC_VER # include # endif #endif /* This is the size of the compression buffer, and thus the size of * an IDAT chunk. Make this whatever size you feel is best for your * machine. One of these will be allocated per png_struct. When this * is full, it writes the data to the disk, and does some other * calculations. Making this an extremely small size will slow * the library down, but you may want to experiment to determine * where it becomes significant, if you are concerned with memory * usage. Note that zlib allocates at least 32Kb also. For readers, * this describes the size of the buffer available to read the data in. * Unless this gets smaller than the size of a row (compressed), * it should not make much difference how big this is. */ #ifndef PNG_ZBUF_SIZE # define PNG_ZBUF_SIZE 8192 #endif /* Just a little check that someone hasn't tried to define something * contradictory. */ #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K) # undef PNG_ZBUF_SIZE # define PNG_ZBUF_SIZE 65536L #endif /* Various modes of operation. Note that after an init, mode is set to * zero automatically when the structure is created. */ #define PNG_HAVE_IHDR 0x01 #define PNG_HAVE_PLTE 0x02 #define PNG_HAVE_IDAT 0x04 #define PNG_AFTER_IDAT 0x08 /* Have complete zlib datastream */ #define PNG_HAVE_IEND 0x10 #define PNG_HAVE_gAMA 0x20 #define PNG_HAVE_cHRM 0x40 #define PNG_HAVE_sRGB 0x80 #define PNG_HAVE_CHUNK_HEADER 0x100 #define PNG_WROTE_tIME 0x200 #define PNG_WROTE_INFO_BEFORE_PLTE 0x400 #define PNG_BACKGROUND_IS_GRAY 0x800 #define PNG_HAVE_PNG_SIGNATURE 0x1000 #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ /* Flags for the transformations the PNG library does on the image data */ #define PNG_BGR 0x0001 #define PNG_INTERLACE 0x0002 #define PNG_PACK 0x0004 #define PNG_SHIFT 0x0008 #define PNG_SWAP_BYTES 0x0010 #define PNG_INVERT_MONO 0x0020 #define PNG_QUANTIZE 0x0040 #define PNG_BACKGROUND 0x0080 #define PNG_BACKGROUND_EXPAND 0x0100 /* 0x0200 unused */ #define PNG_16_TO_8 0x0400 #define PNG_RGBA 0x0800 #define PNG_EXPAND 0x1000 #define PNG_GAMMA 0x2000 #define PNG_GRAY_TO_RGB 0x4000 #define PNG_FILLER 0x8000L #define PNG_PACKSWAP 0x10000L #define PNG_SWAP_ALPHA 0x20000L #define PNG_STRIP_ALPHA 0x40000L #define PNG_INVERT_ALPHA 0x80000L #define PNG_USER_TRANSFORM 0x100000L #define PNG_RGB_TO_GRAY_ERR 0x200000L #define PNG_RGB_TO_GRAY_WARN 0x400000L #define PNG_RGB_TO_GRAY 0x600000L /* two bits, RGB_TO_GRAY_ERR|WARN */ /* 0x800000L Unused */ #define PNG_ADD_ALPHA 0x1000000L /* Added to libpng-1.2.7 */ #define PNG_EXPAND_tRNS 0x2000000L /* Added to libpng-1.2.9 */ /* 0x4000000L unused */ /* 0x8000000L unused */ /* 0x10000000L unused */ /* 0x20000000L unused */ /* 0x40000000L unused */ /* Flags for png_create_struct */ #define PNG_STRUCT_PNG 0x0001 #define PNG_STRUCT_INFO 0x0002 /* Scaling factor for filter heuristic weighting calculations */ #define PNG_WEIGHT_SHIFT 8 #define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT)) #define PNG_COST_SHIFT 3 #define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT)) /* Flags for the png_ptr->flags rather than declaring a byte for each one */ #define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001 #define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002 #define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004 #define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008 #define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010 #define PNG_FLAG_ZLIB_FINISHED 0x0020 #define PNG_FLAG_ROW_INIT 0x0040 #define PNG_FLAG_FILLER_AFTER 0x0080 #define PNG_FLAG_CRC_ANCILLARY_USE 0x0100 #define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200 #define PNG_FLAG_CRC_CRITICAL_USE 0x0400 #define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800 /* 0x1000 unused */ /* 0x2000 unused */ /* 0x4000 unused */ #define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000L #define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000L #define PNG_FLAG_LIBRARY_MISMATCH 0x20000L #define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000L #define PNG_FLAG_STRIP_ERROR_TEXT 0x80000L #define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000L #define PNG_FLAG_ADD_ALPHA 0x200000L /* Added to libpng-1.2.8 */ #define PNG_FLAG_STRIP_ALPHA 0x400000L /* Added to libpng-1.2.8 */ #define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000L /* Added to libpng-1.4.0 */ /* 0x1000000L unused */ /* 0x2000000L unused */ /* 0x4000000L unused */ /* 0x8000000L unused */ /* 0x10000000L unused */ /* 0x20000000L unused */ /* 0x40000000L unused */ #define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \ PNG_FLAG_CRC_ANCILLARY_NOWARN) #define PNG_FLAG_CRC_CRITICAL_MASK (PNG_FLAG_CRC_CRITICAL_USE | \ PNG_FLAG_CRC_CRITICAL_IGNORE) #define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \ PNG_FLAG_CRC_CRITICAL_MASK) /* Save typing and make code easier to understand */ #define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \ abs((int)((c1).green) - (int)((c2).green)) + \ abs((int)((c1).blue) - (int)((c2).blue))) /* Added to libpng-1.2.6 JB */ #define PNG_ROWBYTES(pixel_bits, width) \ ((pixel_bits) >= 8 ? \ ((png_size_t)(width) * (((png_size_t)(pixel_bits)) >> 3)) : \ (( ((png_size_t)(width) * ((png_size_t)(pixel_bits))) + 7) >> 3) ) /* PNG_OUT_OF_RANGE returns true if value is outside the range * ideal-delta..ideal+delta. Each argument is evaluated twice. * "ideal" and "delta" should be constants, normally simple * integers, "value" a variable. Added to libpng-1.2.6 JB */ #define PNG_OUT_OF_RANGE(value, ideal, delta) \ ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) ) /* Constant strings for known chunk types. If you need to add a chunk, * define the name here, and add an invocation of the macro wherever it's * needed. */ #define PNG_IHDR PNG_CONST png_byte png_IHDR[5] = { 73, 72, 68, 82, '\0'} #define PNG_IDAT PNG_CONST png_byte png_IDAT[5] = { 73, 68, 65, 84, '\0'} #define PNG_IEND PNG_CONST png_byte png_IEND[5] = { 73, 69, 78, 68, '\0'} #define PNG_PLTE PNG_CONST png_byte png_PLTE[5] = { 80, 76, 84, 69, '\0'} #define PNG_bKGD PNG_CONST png_byte png_bKGD[5] = { 98, 75, 71, 68, '\0'} #define PNG_cHRM PNG_CONST png_byte png_cHRM[5] = { 99, 72, 82, 77, '\0'} #define PNG_gAMA PNG_CONST png_byte png_gAMA[5] = {103, 65, 77, 65, '\0'} #define PNG_hIST PNG_CONST png_byte png_hIST[5] = {104, 73, 83, 84, '\0'} #define PNG_iCCP PNG_CONST png_byte png_iCCP[5] = {105, 67, 67, 80, '\0'} #define PNG_iTXt PNG_CONST png_byte png_iTXt[5] = {105, 84, 88, 116, '\0'} #define PNG_oFFs PNG_CONST png_byte png_oFFs[5] = {111, 70, 70, 115, '\0'} #define PNG_pCAL PNG_CONST png_byte png_pCAL[5] = {112, 67, 65, 76, '\0'} #define PNG_sCAL PNG_CONST png_byte png_sCAL[5] = {115, 67, 65, 76, '\0'} #define PNG_pHYs PNG_CONST png_byte png_pHYs[5] = {112, 72, 89, 115, '\0'} #define PNG_sBIT PNG_CONST png_byte png_sBIT[5] = {115, 66, 73, 84, '\0'} #define PNG_sPLT PNG_CONST png_byte png_sPLT[5] = {115, 80, 76, 84, '\0'} #define PNG_sRGB PNG_CONST png_byte png_sRGB[5] = {115, 82, 71, 66, '\0'} #define PNG_sTER PNG_CONST png_byte png_sTER[5] = {115, 84, 69, 82, '\0'} #define PNG_tEXt PNG_CONST png_byte png_tEXt[5] = {116, 69, 88, 116, '\0'} #define PNG_tIME PNG_CONST png_byte png_tIME[5] = {116, 73, 77, 69, '\0'} #define PNG_tRNS PNG_CONST png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'} #define PNG_zTXt PNG_CONST png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'} /* Inhibit C++ name-mangling for libpng functions but not for system calls. */ #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ /* These functions are used internally in the code. They generally * shouldn't be used unless you are writing code to add or replace some * functionality in libpng. More information about most functions can * be found in the files where the functions are located. */ /* Allocate memory for an internal libpng struct */ PNG_EXTERN png_voidp png_create_struct PNGARG((int type)); /* Free memory from internal libpng struct */ PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr)); PNG_EXTERN png_voidp png_create_struct_2 PNGARG((int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)); PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr, png_free_ptr free_fn, png_voidp mem_ptr)); /* Free any memory that info_ptr points to and reset struct. */ PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr, png_infop info_ptr)); /* Function to allocate memory for zlib. PNGAPI is disallowed. */ PNG_EXTERN voidpf png_zalloc PNGARG((voidpf png_ptr, uInt items, uInt size)); /* Function to free memory for zlib. PNGAPI is disallowed. */ PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr)); /* Next four functions are used internally as callbacks. PNGCBAPI is required * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3, changed to PNGCBAPI * at 1.5.0 */ PNG_EXTERN void PNGCBAPI png_default_read_data PNGARG((png_structp png_ptr, png_bytep data, png_size_t length)); #ifdef PNG_PROGRESSIVE_READ_SUPPORTED PNG_EXTERN void PNGCBAPI png_push_fill_buffer PNGARG((png_structp png_ptr, png_bytep buffer, png_size_t length)); #endif PNG_EXTERN void PNGCBAPI png_default_write_data PNGARG((png_structp png_ptr, png_bytep data, png_size_t length)); #ifdef PNG_WRITE_FLUSH_SUPPORTED # ifdef PNG_STDIO_SUPPORTED PNG_EXTERN void PNGCBAPI png_default_flush PNGARG((png_structp png_ptr)); # endif #endif /* Reset the CRC variable */ PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr)); /* Write the "data" buffer to whatever output you are using */ PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, png_bytep data, png_size_t length)); /* Read the chunk header (length + type name) */ PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr)); /* Read data from whatever input you are using into the "data" buffer */ PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data, png_size_t length)); /* Read bytes into buf, and update png_ptr->crc */ PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf, png_size_t length)); /* Decompress data in a chunk that uses compression */ #if defined(PNG_zTXt_SUPPORTED) || defined(PNG_iTXt_SUPPORTED) || \ defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr, int comp_type, png_size_t chunklength, png_size_t prefix_length, png_size_t *data_length)); #endif /* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */ PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip)); /* Read the CRC from the file and compare it to the libpng calculated CRC */ PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr)); /* Calculate the CRC over a section of data. Note that we are only * passing a maximum of 64K on systems that have this as a memory limit, * since this is the maximum buffer size we can specify. */ PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, png_bytep ptr, png_size_t length)); #ifdef PNG_WRITE_FLUSH_SUPPORTED PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); #endif /* Write various chunks */ /* Write the IHDR chunk, and update the png_struct with the necessary * information. */ PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int compression_method, int filter_method, int interlace_method)); PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, png_colorp palette, png_uint_32 num_pal)); PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data, png_size_t length)); PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr)); #ifdef PNG_WRITE_gAMA_SUPPORTED # ifdef PNG_FLOATING_POINT_SUPPORTED PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma)); # endif # ifdef PNG_FIXED_POINT_SUPPORTED PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr, png_fixed_point file_gamma)); # endif #endif #ifdef PNG_WRITE_sBIT_SUPPORTED PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, png_color_8p sbit, int color_type)); #endif #ifdef PNG_WRITE_cHRM_SUPPORTED # ifdef PNG_FLOATING_POINT_SUPPORTED PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr, double white_x, double white_y, double red_x, double red_y, double green_x, double green_y, double blue_x, double blue_y)); # endif PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr, png_fixed_point int_white_x, png_fixed_point int_white_y, png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, png_fixed_point int_blue_y)); #endif #ifdef PNG_WRITE_sRGB_SUPPORTED PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr, int intent)); #endif #ifdef PNG_WRITE_iCCP_SUPPORTED PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr, png_charp name, int compression_type, png_charp profile, int proflen)); /* Note to maintainer: profile should be png_bytep */ #endif #ifdef PNG_WRITE_sPLT_SUPPORTED PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr, png_sPLT_tp palette)); #endif #ifdef PNG_WRITE_tRNS_SUPPORTED PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, png_bytep trans, png_color_16p values, int number, int color_type)); #endif #ifdef PNG_WRITE_bKGD_SUPPORTED PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr, png_color_16p values, int color_type)); #endif #ifdef PNG_WRITE_hIST_SUPPORTED PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, png_uint_16p hist, int num_hist)); #endif #if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr, png_charp key, png_charpp new_key)); #endif #ifdef PNG_WRITE_tEXt_SUPPORTED PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_charp key, png_charp text, png_size_t text_len)); #endif #ifdef PNG_WRITE_zTXt_SUPPORTED PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_charp key, png_charp text, png_size_t text_len, int compression)); #endif #ifdef PNG_WRITE_iTXt_SUPPORTED PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr, int compression, png_charp key, png_charp lang, png_charp lang_key, png_charp text)); #endif #ifdef PNG_TEXT_SUPPORTED /* Added at version 1.0.14 and 1.2.4 */ PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, int num_text)); #endif #ifdef PNG_WRITE_oFFs_SUPPORTED PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr, png_int_32 x_offset, png_int_32 y_offset, int unit_type)); #endif #ifdef PNG_WRITE_pCAL_SUPPORTED PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, png_charp units, png_charpp params)); #endif #ifdef PNG_WRITE_pHYs_SUPPORTED PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr, png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, int unit_type)); #endif #ifdef PNG_WRITE_tIME_SUPPORTED PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr, png_timep mod_time)); #endif #ifdef PNG_WRITE_sCAL_SUPPORTED # if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_STDIO_SUPPORTED) PNG_EXTERN void png_write_sCAL PNGARG((png_structp png_ptr, int unit, double width, double height)); # else # ifdef PNG_FIXED_POINT_SUPPORTED PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr, int unit, png_charp width, png_charp height)); # endif # endif #endif /* Called when finished processing a row of data */ PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); /* Internal use only. Called before first row of data */ PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr)); #ifdef PNG_READ_GAMMA_SUPPORTED PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr, png_byte bit_depth)); #endif /* Combine a row of data, dealing with alpha, etc. if requested */ PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row, int mask)); #ifdef PNG_READ_INTERLACING_SUPPORTED /* Expand an interlaced row */ /* OLD pre-1.0.9 interface: PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info, png_bytep row, int pass, png_uint_32 transformations)); */ PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr)); #endif /* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */ #ifdef PNG_WRITE_INTERLACING_SUPPORTED /* Grab pixels out of a row for an interlaced pass */ PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info, png_bytep row, int pass)); #endif /* Unfilter a row */ PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr, png_row_infop row_info, png_bytep row, png_bytep prev_row, int filter)); /* Choose the best filter to use and filter the row data */ PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr, png_row_infop row_info)); /* Write out the filtered row. */ PNG_EXTERN void png_write_filtered_row PNGARG((png_structp png_ptr, png_bytep filtered_row)); /* Finish a row while reading, dealing with interlacing passes, etc. */ PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr)); /* Initialize the row buffers, etc. */ PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr)); /* Optional call to update the users info structure */ PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, png_infop info_ptr)); /* These are the functions that do the transformations */ #ifdef PNG_READ_FILLER_SUPPORTED PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, png_bytep row, png_uint_32 filler, png_uint_32 flags)); #endif #ifdef PNG_READ_SWAP_ALPHA_SUPPORTED PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info, png_bytep row)); #endif #ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info, png_bytep row)); #endif #ifdef PNG_READ_INVERT_ALPHA_SUPPORTED PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info, png_bytep row)); #endif #ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info, png_bytep row)); #endif #if defined(PNG_WRITE_FILLER_SUPPORTED) || \ defined(PNG_READ_STRIP_ALPHA_SUPPORTED) PNG_EXTERN void png_do_strip_filler PNGARG((png_row_infop row_info, png_bytep row, png_uint_32 flags)); #endif #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, png_bytep row)); #endif #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ defined(PNG_WRITE_PACKSWAP_SUPPORTED) PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, png_bytep row)); #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, png_row_infop row_info, png_bytep row)); #endif #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info, png_bytep row)); #endif #ifdef PNG_READ_PACK_SUPPORTED PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, png_bytep row)); #endif #ifdef PNG_READ_SHIFT_SUPPORTED PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, png_bytep row, png_color_8p sig_bits)); #endif #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, png_bytep row)); #endif #ifdef PNG_READ_16_TO_8_SUPPORTED PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, png_bytep row)); #endif #ifdef PNG_READ_QUANTIZE_SUPPORTED PNG_EXTERN void png_do_quantize PNGARG((png_row_infop row_info, png_bytep row, png_bytep palette_lookup, png_bytep quantize_lookup)); # ifdef PNG_CORRECT_PALETTE_SUPPORTED PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr, png_colorp palette, int num_palette)); # endif #endif #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, png_bytep row)); #endif #ifdef PNG_WRITE_PACK_SUPPORTED PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info, png_bytep row, png_uint_32 bit_depth)); #endif #ifdef PNG_WRITE_SHIFT_SUPPORTED PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, png_bytep row, png_color_8p bit_depth)); #endif #ifdef PNG_READ_BACKGROUND_SUPPORTED # ifdef PNG_READ_GAMMA_SUPPORTED PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row, png_color_16p trans_color, png_color_16p background, png_color_16p background_1, png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1, png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1, png_uint_16pp gamma_16_to_1, int gamma_shift)); # else PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row, png_color_16p trans_color, png_color_16p background)); # endif #endif #ifdef PNG_READ_GAMMA_SUPPORTED PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, png_bytep row, png_bytep gamma_table, png_uint_16pp gamma_16_table, int gamma_shift)); #endif #ifdef PNG_READ_EXPAND_SUPPORTED PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info, png_bytep row, png_colorp palette, png_bytep trans, int num_trans)); PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info, png_bytep row, png_color_16p trans_value)); #endif /* The following decodes the appropriate chunks, and does error correction, * then calls the appropriate callback for the chunk if it is valid. */ /* Decode the IHDR chunk */ PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #ifdef PNG_READ_bKGD_SUPPORTED PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_cHRM_SUPPORTED PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_gAMA_SUPPORTED PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_hIST_SUPPORTED PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_iCCP_SUPPORTED extern void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif /* PNG_READ_iCCP_SUPPORTED */ #ifdef PNG_READ_iTXt_SUPPORTED PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_oFFs_SUPPORTED PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_pCAL_SUPPORTED PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_pHYs_SUPPORTED PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_sBIT_SUPPORTED PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_sCAL_SUPPORTED PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_sPLT_SUPPORTED extern void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif /* PNG_READ_sPLT_SUPPORTED */ #ifdef PNG_READ_sRGB_SUPPORTED PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_tEXt_SUPPORTED PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_tIME_SUPPORTED PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_tRNS_SUPPORTED PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif #ifdef PNG_READ_zTXt_SUPPORTED PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); #endif PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr, png_bytep chunk_name)); /* Handle the transformations for reading and writing */ PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr)); PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr)); PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr)); #ifdef PNG_PROGRESSIVE_READ_SUPPORTED PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr, png_infop info_ptr)); PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr, png_infop info_ptr)); PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr)); PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr, png_uint_32 length)); PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr)); PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr)); PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr, png_bytep buffer, png_size_t buffer_length)); PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr)); PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr, png_bytep buffer, png_size_t buffer_length)); PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr)); PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr, png_infop info_ptr)); PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr, png_infop info_ptr)); PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row)); PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr, png_infop info_ptr)); PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr, png_infop info_ptr)); PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr)); # ifdef PNG_READ_tEXt_SUPPORTED PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr)); # endif # ifdef PNG_READ_zTXt_SUPPORTED PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr)); # endif # ifdef PNG_READ_iTXt_SUPPORTED PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 length)); PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr)); # endif #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ #ifdef PNG_MNG_FEATURES_SUPPORTED PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info, png_bytep row)); PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info, png_bytep row)); #endif /* Added at libpng version 1.4.0 */ #ifdef PNG_cHRM_SUPPORTED PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr, png_fixed_point int_white_x, png_fixed_point int_white_y, png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, png_fixed_point int_blue_y)); #endif #ifdef PNG_cHRM_SUPPORTED # ifdef PNG_CHECK_cHRM_SUPPORTED /* Added at libpng version 1.2.34 and 1.4.0 */ PNG_EXTERN void png_64bit_product PNGARG((long v1, long v2, unsigned long *hi_product, unsigned long *lo_product)); # endif #endif /* Added at libpng version 1.4.0 */ PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int interlace_type, int compression_type, int filter_type)); /* Free all memory used by the read (old method - NOT DLL EXPORTED) */ extern void png_read_destroy PNGARG((png_structp png_ptr, png_infop info_ptr, png_infop end_info_ptr)); /* Free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */ extern void png_write_destroy PNGARG((png_structp png_ptr)); #ifdef USE_FAR_KEYWORD /* memory model conversion function */ extern void *png_far_to_near PNGARG((png_structp png_ptr,png_voidp ptr, int check)); #endif /* USE_FAR_KEYWORD */ #include "pngdebug.h" /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ #ifdef __cplusplus } #endif #endif /* PNGPRIV_H */