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Diffstat (limited to 'src/3rdparty/libpng/pngpriv.h')
| -rw-r--r-- | src/3rdparty/libpng/pngpriv.h | 955 |
1 files changed, 955 insertions, 0 deletions
diff --git a/src/3rdparty/libpng/pngpriv.h b/src/3rdparty/libpng/pngpriv.h new file mode 100644 index 0000000..13c2b3f --- /dev/null +++ b/src/3rdparty/libpng/pngpriv.h @@ -0,0 +1,955 @@ + +/* pngpriv.h - private declarations for use inside libpng + * + * libpng version 1.4.0 - January 3, 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 + +#ifndef PNG_VERSION_INFO_ONLY + +#include <stdlib.h> + +/* 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 +# ifdef MACOS + /* We need to check that <math.h> hasn't already been included earlier + * as it seems it doesn't agree with <fp.h>, yet we should really use + * <fp.h> if possible. + */ +# if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__) +# include <fp.h> +# endif +# else +# include <math.h> +# endif +# if defined(_AMIGA) && defined(__SASC) && defined(_M68881) + /* Amiga SAS/C: We must include builtin FPU functions when compiling using + * MATH=68881 + */ +# include <m68881.h> +# endif +#endif + +/* Codewarrior on NT has linking problems without this. */ +#if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__) +# define PNG_ALWAYS_EXTERN +#endif + +/* This provides the non-ANSI (far) memory allocation routines. */ +#if defined(__TURBOC__) && defined(__MSDOS__) +# include <mem.h> +# include <alloc.h> +#endif + +#if defined(WIN32) || defined(_Windows) || defined(_WINDOWS) || \ + defined(_WIN32) || defined(__WIN32__) +# include <windows.h> /* defines _WINDOWS_ macro */ +/* I have no idea why is this necessary... */ +# ifdef _MSC_VER +# include <malloc.h> +# endif +#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_DITHER 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. PNGAPI is required + * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3. */ + +PNG_EXTERN void PNGAPI png_default_read_data PNGARG((png_structp png_ptr, + png_bytep data, png_size_t length)); + +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED +PNG_EXTERN void PNGAPI png_push_fill_buffer PNGARG((png_structp png_ptr, + png_bytep buffer, png_size_t length)); +#endif + +PNG_EXTERN void PNGAPI 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 PNGAPI 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_DITHER_SUPPORTED +PNG_EXTERN void png_do_dither PNGARG((png_row_infop row_info, + png_bytep row, png_bytep palette_lookup, png_bytep dither_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 */ + +/* Define PNG_DEBUG at compile time for debugging information. Higher + * numbers for PNG_DEBUG mean more debugging information. This has + * only been added since version 0.95 so it is not implemented throughout + * libpng yet, but more support will be added as needed. + */ +#ifdef PNG_DEBUG +#if (PNG_DEBUG > 0) +#if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER) +#include <crtdbg.h> +#if (PNG_DEBUG > 1) +#ifndef _DEBUG +# define _DEBUG +#endif +#ifndef png_debug +#define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE) +#endif +#ifndef png_debug1 +#define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1) +#endif +#ifndef png_debug2 +#define png_debug2(l,m,p1,p2) _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2) +#endif +#endif +#else /* PNG_DEBUG_FILE || !_MSC_VER */ +#ifndef PNG_DEBUG_FILE +#define PNG_DEBUG_FILE stderr +#endif /* PNG_DEBUG_FILE */ + +#if (PNG_DEBUG > 1) +/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on + * non-ISO compilers + */ +# ifdef __STDC__ +# ifndef png_debug +# define png_debug(l,m) \ + { \ + int num_tabs=l; \ + fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \ + } +# endif +# ifndef png_debug1 +# define png_debug1(l,m,p1) \ + { \ + int num_tabs=l; \ + fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \ + } +# endif +# ifndef png_debug2 +# define png_debug2(l,m,p1,p2) \ + { \ + int num_tabs=l; \ + fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \ + } +# endif +# else /* __STDC __ */ +# ifndef png_debug +# define png_debug(l,m) \ + { \ + int num_tabs=l; \ + char format[256]; \ + snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ + m,PNG_STRING_NEWLINE); \ + fprintf(PNG_DEBUG_FILE,format); \ + } +# endif +# ifndef png_debug1 +# define png_debug1(l,m,p1) \ + { \ + int num_tabs=l; \ + char format[256]; \ + snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ + m,PNG_STRING_NEWLINE); \ + fprintf(PNG_DEBUG_FILE,format,p1); \ + } +# endif +# ifndef png_debug2 +# define png_debug2(l,m,p1,p2) \ + { \ + int num_tabs=l; \ + char format[256]; \ + snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ + m,PNG_STRING_NEWLINE); \ + fprintf(PNG_DEBUG_FILE,format,p1,p2); \ + } +# endif +# endif /* __STDC __ */ +#endif /* (PNG_DEBUG > 1) */ + +#endif /* _MSC_VER */ +#endif /* (PNG_DEBUG > 0) */ +#endif /* PNG_DEBUG */ +#ifndef png_debug +#define png_debug(l, m) +#endif +#ifndef png_debug1 +#define png_debug1(l, m, p1) +#endif +#ifndef png_debug2 +#define png_debug2(l, m, p1, p2) +#endif + +/* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ + +#ifdef __cplusplus +} +#endif + +#endif /* PNG_VERSION_INFO_ONLY */ +#endif /* PNGPRIV_H */ |