X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/4946a942d77cf51e00aa56404756e124d7c11411..94e0018723919fe2ca2f5b5f0a42804c16dbf3a1:/src/png/png.h diff --git a/src/png/png.h b/src/png/png.h index 365c80b392..805be120f5 100644 --- a/src/png/png.h +++ b/src/png/png.h @@ -1,14 +1,17 @@ + /* png.h - header file for PNG reference library * - * libpng version 1.2.4 - July 8, 2002 - * Copyright (c) 1998-2002 Glenn Randers-Pehrson + * libpng version 1.4.4 - September 23, 2010 + * 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 (See LICENSE, below) + * * Authors and maintainers: * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger - * libpng versions 0.97, January 1998, through 1.2.4 - July 8, 2002: Glenn + * libpng versions 0.97, January 1998, through 1.4.4 - September 23, 2010: Glenn * See also "Contributing Authors", below. * * Note about libpng version numbers: @@ -93,6 +96,57 @@ * 1.2.4rc1 13 10204 12.so.0.1.2.4rc1 * 1.0.14 10 10014 10.so.0.1.0.14 * 1.2.4 13 10204 12.so.0.1.2.4 + * 1.2.5beta1-2 13 10205 12.so.0.1.2.5beta1-2 + * 1.0.15rc1-3 10 10015 10.so.0.1.0.15rc1-3 + * 1.2.5rc1-3 13 10205 12.so.0.1.2.5rc1-3 + * 1.0.15 10 10015 10.so.0.1.0.15 + * 1.2.5 13 10205 12.so.0.1.2.5 + * 1.2.6beta1-4 13 10206 12.so.0.1.2.6beta1-4 + * 1.0.16 10 10016 10.so.0.1.0.16 + * 1.2.6 13 10206 12.so.0.1.2.6 + * 1.2.7beta1-2 13 10207 12.so.0.1.2.7beta1-2 + * 1.0.17rc1 10 10017 12.so.0.1.0.17rc1 + * 1.2.7rc1 13 10207 12.so.0.1.2.7rc1 + * 1.0.17 10 10017 12.so.0.1.0.17 + * 1.2.7 13 10207 12.so.0.1.2.7 + * 1.2.8beta1-5 13 10208 12.so.0.1.2.8beta1-5 + * 1.0.18rc1-5 10 10018 12.so.0.1.0.18rc1-5 + * 1.2.8rc1-5 13 10208 12.so.0.1.2.8rc1-5 + * 1.0.18 10 10018 12.so.0.1.0.18 + * 1.2.8 13 10208 12.so.0.1.2.8 + * 1.2.9beta1-3 13 10209 12.so.0.1.2.9beta1-3 + * 1.2.9beta4-11 13 10209 12.so.0.9[.0] + * 1.2.9rc1 13 10209 12.so.0.9[.0] + * 1.2.9 13 10209 12.so.0.9[.0] + * 1.2.10beta1-7 13 10210 12.so.0.10[.0] + * 1.2.10rc1-2 13 10210 12.so.0.10[.0] + * 1.2.10 13 10210 12.so.0.10[.0] + * 1.4.0beta1-5 14 10400 14.so.0.0[.0] + * 1.2.11beta1-4 13 10211 12.so.0.11[.0] + * 1.4.0beta7-8 14 10400 14.so.0.0[.0] + * 1.2.11 13 10211 12.so.0.11[.0] + * 1.2.12 13 10212 12.so.0.12[.0] + * 1.4.0beta9-14 14 10400 14.so.0.0[.0] + * 1.2.13 13 10213 12.so.0.13[.0] + * 1.4.0beta15-36 14 10400 14.so.0.0[.0] + * 1.4.0beta37-87 14 10400 14.so.14.0[.0] + * 1.4.0rc01 14 10400 14.so.14.0[.0] + * 1.4.0beta88-109 14 10400 14.so.14.0[.0] + * 1.4.0rc02-08 14 10400 14.so.14.0[.0] + * 1.4.0 14 10400 14.so.14.0[.0] + * 1.4.1beta01-03 14 10401 14.so.14.1[.0] + * 1.4.1rc01 14 10401 14.so.14.1[.0] + * 1.4.1beta04-12 14 10401 14.so.14.1[.0] + * 1.4.1rc02-04 14 10401 14.so.14.1[.0] + * 1.4.1 14 10401 14.so.14.1[.0] + * 1.4.2beta01 14 10402 14.so.14.2[.0] + * 1.4.2rc02-06 14 10402 14.so.14.2[.0] + * 1.4.2 14 10402 14.so.14.2[.0] + * 1.4.3beta01-05 14 10403 14.so.14.3[.0] + * 1.4.3rc01-03 14 10403 14.so.14.3[.0] + * 1.4.3 14 10403 14.so.14.3[.0] + * 1.4.4beta01-08 14 10404 14.so.14.4[.0] + * 1.4.4rc01-06 14 10404 14.so.14.4[.0] * * Henceforth the source version will match the shared-library major * and minor numbers; the shared-library major version number will be @@ -112,8 +166,8 @@ * in binary compatibility (e.g., when a new feature is added). * * See libpng.txt or libpng.3 for more information. The PNG specification - * is available as RFC 2083 - * and as a W3C Recommendation + * is available as a W3C Recommendation and as an ISO Specification, + * , and the + * application must include this before png.h to obtain the definition + * of jmp_buf. + */ +typedef void (PNGAPI *png_longjmp_ptr) PNGARG((jmp_buf, int)); +#endif /* Transform masks for the high-level interface */ #define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */ @@ -986,14 +1070,19 @@ typedef void (PNGAPI *png_unknown_chunk_ptr) PNGARG((png_structp)); #define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */ #define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */ #define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */ -#define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* WRITE only */ +#define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only */ +/* Added to libpng-1.2.34 */ +#define PNG_TRANSFORM_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER +#define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */ +/* Added to libpng-1.4.0 */ +#define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */ /* Flags for MNG supported features */ #define PNG_FLAG_MNG_EMPTY_PLTE 0x01 #define PNG_FLAG_MNG_FILTER_64 0x04 #define PNG_ALL_MNG_FEATURES 0x05 -typedef png_voidp (*png_malloc_ptr) PNGARG((png_structp, png_size_t)); +typedef png_voidp (*png_malloc_ptr) PNGARG((png_structp, png_alloc_size_t)); typedef void (*png_free_ptr) PNGARG((png_structp, png_voidp)); /* The structure that holds the information to read and write PNG files. @@ -1006,282 +1095,388 @@ typedef void (*png_free_ptr) PNGARG((png_structp, png_voidp)); struct png_struct_def { #ifdef PNG_SETJMP_SUPPORTED - jmp_buf jmpbuf; /* used in png_error */ + jmp_buf jmpbuf PNG_DEPSTRUCT; /* used in png_error */ + png_longjmp_ptr longjmp_fn PNG_DEPSTRUCT;/* setjmp non-local goto + function. */ #endif - png_error_ptr error_fn; /* function for printing errors and aborting */ - png_error_ptr warning_fn; /* function for printing warnings */ - png_voidp error_ptr; /* user supplied struct for error functions */ - png_rw_ptr write_data_fn; /* function for writing output data */ - png_rw_ptr read_data_fn; /* function for reading input data */ - png_voidp io_ptr; /* ptr to application struct for I/O functions */ + png_error_ptr error_fn PNG_DEPSTRUCT; /* function for printing + errors and aborting */ + png_error_ptr warning_fn PNG_DEPSTRUCT; /* function for printing + warnings */ + png_voidp error_ptr PNG_DEPSTRUCT; /* user supplied struct for + error functions */ + png_rw_ptr write_data_fn PNG_DEPSTRUCT; /* function for writing + output data */ + png_rw_ptr read_data_fn PNG_DEPSTRUCT; /* function for reading + input data */ + png_voidp io_ptr PNG_DEPSTRUCT; /* ptr to application struct + for I/O functions */ -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) - png_user_transform_ptr read_user_transform_fn; /* user read transform */ +#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED + png_user_transform_ptr read_user_transform_fn PNG_DEPSTRUCT; /* user read + transform */ #endif -#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) - png_user_transform_ptr write_user_transform_fn; /* user write transform */ +#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED + png_user_transform_ptr write_user_transform_fn PNG_DEPSTRUCT; /* user write + transform */ #endif /* These were added in libpng-1.0.2 */ -#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) - png_voidp user_transform_ptr; /* user supplied struct for user transform */ - png_byte user_transform_depth; /* bit depth of user transformed pixels */ - png_byte user_transform_channels; /* channels in user transformed pixels */ -#endif -#endif - - png_uint_32 mode; /* tells us where we are in the PNG file */ - png_uint_32 flags; /* flags indicating various things to libpng */ - png_uint_32 transformations; /* which transformations to perform */ - - z_stream zstream; /* pointer to decompression structure (below) */ - png_bytep zbuf; /* buffer for zlib */ - png_size_t zbuf_size; /* size of zbuf */ - int zlib_level; /* holds zlib compression level */ - int zlib_method; /* holds zlib compression method */ - int zlib_window_bits; /* holds zlib compression window bits */ - int zlib_mem_level; /* holds zlib compression memory level */ - int zlib_strategy; /* holds zlib compression strategy */ - - png_uint_32 width; /* width of image in pixels */ - png_uint_32 height; /* height of image in pixels */ - png_uint_32 num_rows; /* number of rows in current pass */ - png_uint_32 usr_width; /* width of row at start of write */ - png_uint_32 rowbytes; /* size of row in bytes */ - png_uint_32 irowbytes; /* size of current interlaced row in bytes */ - png_uint_32 iwidth; /* width of current interlaced row in pixels */ - png_uint_32 row_number; /* current row in interlace pass */ - png_bytep prev_row; /* buffer to save previous (unfiltered) row */ - png_bytep row_buf; /* buffer to save current (unfiltered) row */ - png_bytep sub_row; /* buffer to save "sub" row when filtering */ - png_bytep up_row; /* buffer to save "up" row when filtering */ - png_bytep avg_row; /* buffer to save "avg" row when filtering */ - png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */ - png_row_info row_info; /* used for transformation routines */ - - png_uint_32 idat_size; /* current IDAT size for read */ - png_uint_32 crc; /* current chunk CRC value */ - png_colorp palette; /* palette from the input file */ - png_uint_16 num_palette; /* number of color entries in palette */ - png_uint_16 num_trans; /* number of transparency values */ - png_byte chunk_name[5]; /* null-terminated name of current chunk */ - png_byte compression; /* file compression type (always 0) */ - png_byte filter; /* file filter type (always 0) */ - png_byte interlaced; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ - png_byte pass; /* current interlace pass (0 - 6) */ - png_byte do_filter; /* row filter flags (see PNG_FILTER_ below ) */ - png_byte color_type; /* color type of file */ - png_byte bit_depth; /* bit depth of file */ - png_byte usr_bit_depth; /* bit depth of users row */ - png_byte pixel_depth; /* number of bits per pixel */ - png_byte channels; /* number of channels in file */ - png_byte usr_channels; /* channels at start of write */ - png_byte sig_bytes; /* magic bytes read/written from start of file */ + png_voidp user_transform_ptr PNG_DEPSTRUCT; /* user supplied struct + for user transform */ + png_byte user_transform_depth PNG_DEPSTRUCT; /* bit depth of user + transformed pixels */ + png_byte user_transform_channels PNG_DEPSTRUCT; /* channels in user + transformed pixels */ +#endif +#endif + + png_uint_32 mode PNG_DEPSTRUCT; /* tells us where we are in + the PNG file */ + png_uint_32 flags PNG_DEPSTRUCT; /* flags indicating various + things to libpng */ + png_uint_32 transformations PNG_DEPSTRUCT; /* which transformations + to perform */ + + z_stream zstream PNG_DEPSTRUCT; /* pointer to decompression + structure (below) */ + png_bytep zbuf PNG_DEPSTRUCT; /* buffer for zlib */ + png_size_t zbuf_size PNG_DEPSTRUCT; /* size of zbuf */ + int zlib_level PNG_DEPSTRUCT; /* holds zlib compression level */ + int zlib_method PNG_DEPSTRUCT; /* holds zlib compression method */ + int zlib_window_bits PNG_DEPSTRUCT; /* holds zlib compression window + bits */ + int zlib_mem_level PNG_DEPSTRUCT; /* holds zlib compression memory + level */ + int zlib_strategy PNG_DEPSTRUCT; /* holds zlib compression + strategy */ + + png_uint_32 width PNG_DEPSTRUCT; /* width of image in pixels */ + png_uint_32 height PNG_DEPSTRUCT; /* height of image in pixels */ + png_uint_32 num_rows PNG_DEPSTRUCT; /* number of rows in current pass */ + png_uint_32 usr_width PNG_DEPSTRUCT; /* width of row at start of write */ + png_size_t rowbytes PNG_DEPSTRUCT; /* size of row in bytes */ +#if 0 /* Replaced with the following in libpng-1.4.1 */ + png_size_t irowbytes PNG_DEPSTRUCT; +#endif +/* Added in libpng-1.4.1 */ +#ifdef PNG_USER_LIMITS_SUPPORTED + /* Total memory that a zTXt, sPLT, iTXt, iCCP, or unknown chunk + * can occupy when decompressed. 0 means unlimited. + * We will change the typedef from png_size_t to png_alloc_size_t + * in libpng-1.6.0 + */ + png_alloc_size_t user_chunk_malloc_max PNG_DEPSTRUCT; +#endif + png_uint_32 iwidth PNG_DEPSTRUCT; /* width of current interlaced + row in pixels */ + png_uint_32 row_number PNG_DEPSTRUCT; /* current row in interlace pass */ + png_bytep prev_row PNG_DEPSTRUCT; /* buffer to save previous + (unfiltered) row */ + png_bytep row_buf PNG_DEPSTRUCT; /* buffer to save current + (unfiltered) row */ + png_bytep sub_row PNG_DEPSTRUCT; /* buffer to save "sub" row + when filtering */ + png_bytep up_row PNG_DEPSTRUCT; /* buffer to save "up" row + when filtering */ + png_bytep avg_row PNG_DEPSTRUCT; /* buffer to save "avg" row + when filtering */ + png_bytep paeth_row PNG_DEPSTRUCT; /* buffer to save "Paeth" row + when filtering */ + png_row_info row_info PNG_DEPSTRUCT; /* used for transformation + routines */ + + png_uint_32 idat_size PNG_DEPSTRUCT; /* current IDAT size for read */ + png_uint_32 crc PNG_DEPSTRUCT; /* current chunk CRC value */ + png_colorp palette PNG_DEPSTRUCT; /* palette from the input file */ + png_uint_16 num_palette PNG_DEPSTRUCT; /* number of color entries in + palette */ + png_uint_16 num_trans PNG_DEPSTRUCT; /* number of transparency values */ + png_byte chunk_name[5] PNG_DEPSTRUCT; /* null-terminated name of current + chunk */ + png_byte compression PNG_DEPSTRUCT; /* file compression type + (always 0) */ + png_byte filter PNG_DEPSTRUCT; /* file filter type (always 0) */ + png_byte interlaced PNG_DEPSTRUCT; /* PNG_INTERLACE_NONE, + PNG_INTERLACE_ADAM7 */ + png_byte pass PNG_DEPSTRUCT; /* current interlace pass (0 - 6) */ + png_byte do_filter PNG_DEPSTRUCT; /* row filter flags (see + PNG_FILTER_ below ) */ + png_byte color_type PNG_DEPSTRUCT; /* color type of file */ + png_byte bit_depth PNG_DEPSTRUCT; /* bit depth of file */ + png_byte usr_bit_depth PNG_DEPSTRUCT; /* bit depth of users row */ + png_byte pixel_depth PNG_DEPSTRUCT; /* number of bits per pixel */ + png_byte channels PNG_DEPSTRUCT; /* number of channels in file */ + png_byte usr_channels PNG_DEPSTRUCT; /* channels at start of write */ + png_byte sig_bytes PNG_DEPSTRUCT; /* magic bytes read/written from + start of file */ #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) -#ifdef PNG_LEGACY_SUPPORTED - png_byte filler; /* filler byte for pixel expansion */ -#else - png_uint_16 filler; /* filler bytes for pixel expansion */ -#endif + png_uint_16 filler PNG_DEPSTRUCT; /* filler bytes for pixel + expansion */ #endif -#if defined(PNG_bKGD_SUPPORTED) - png_byte background_gamma_type; +#ifdef PNG_bKGD_SUPPORTED + png_byte background_gamma_type PNG_DEPSTRUCT; # ifdef PNG_FLOATING_POINT_SUPPORTED - float background_gamma; + float background_gamma PNG_DEPSTRUCT; # endif - png_color_16 background; /* background color in screen gamma space */ -#if defined(PNG_READ_GAMMA_SUPPORTED) - png_color_16 background_1; /* background normalized to gamma 1.0 */ + png_color_16 background PNG_DEPSTRUCT; /* background color in + screen gamma space */ +#ifdef PNG_READ_GAMMA_SUPPORTED + png_color_16 background_1 PNG_DEPSTRUCT; /* background normalized + to gamma 1.0 */ #endif #endif /* PNG_bKGD_SUPPORTED */ -#if defined(PNG_WRITE_FLUSH_SUPPORTED) - png_flush_ptr output_flush_fn;/* Function for flushing output */ - png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */ - png_uint_32 flush_rows; /* number of rows written since last flush */ +#ifdef PNG_WRITE_FLUSH_SUPPORTED + png_flush_ptr output_flush_fn PNG_DEPSTRUCT; /* Function for flushing + output */ + png_uint_32 flush_dist PNG_DEPSTRUCT; /* how many rows apart to flush, + 0 - no flush */ + png_uint_32 flush_rows PNG_DEPSTRUCT; /* number of rows written since + last flush */ #endif #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - int gamma_shift; /* number of "insignificant" bits 16-bit gamma */ + int gamma_shift PNG_DEPSTRUCT; /* number of "insignificant" bits + 16-bit gamma */ #ifdef PNG_FLOATING_POINT_SUPPORTED - float gamma; /* file gamma value */ - float screen_gamma; /* screen gamma value (display_exponent) */ + float gamma PNG_DEPSTRUCT; /* file gamma value */ + float screen_gamma PNG_DEPSTRUCT; /* screen gamma value + (display_exponent) */ #endif #endif #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - png_bytep gamma_table; /* gamma table for 8-bit depth files */ - png_bytep gamma_from_1; /* converts from 1.0 to screen */ - png_bytep gamma_to_1; /* converts from file to 1.0 */ - png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */ - png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */ - png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */ + png_bytep gamma_table PNG_DEPSTRUCT; /* gamma table for 8-bit + depth files */ + png_bytep gamma_from_1 PNG_DEPSTRUCT; /* converts from 1.0 to screen */ + png_bytep gamma_to_1 PNG_DEPSTRUCT; /* converts from file to 1.0 */ + png_uint_16pp gamma_16_table PNG_DEPSTRUCT; /* gamma table for 16-bit + depth files */ + png_uint_16pp gamma_16_from_1 PNG_DEPSTRUCT; /* converts from 1.0 to + screen */ + png_uint_16pp gamma_16_to_1 PNG_DEPSTRUCT; /* converts from file to 1.0 */ #endif #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED) - png_color_8 sig_bit; /* significant bits in each available channel */ + png_color_8 sig_bit PNG_DEPSTRUCT; /* significant bits in each + available channel */ #endif #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) - png_color_8 shift; /* shift for significant bit tranformation */ + png_color_8 shift PNG_DEPSTRUCT; /* shift for significant bit + tranformation */ #endif #if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \ || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - png_bytep trans; /* transparency values for paletted files */ - png_color_16 trans_values; /* transparency values for non-paletted files */ + png_bytep trans_alpha PNG_DEPSTRUCT; /* alpha values for + paletted files */ + png_color_16 trans_color PNG_DEPSTRUCT; /* transparent color for + non-paletted files */ #endif - png_read_status_ptr read_row_fn; /* called after each row is decoded */ - png_write_status_ptr write_row_fn; /* called after each row is encoded */ + png_read_status_ptr read_row_fn PNG_DEPSTRUCT; /* called after each + row is decoded */ + png_write_status_ptr write_row_fn PNG_DEPSTRUCT; /* called after each + row is encoded */ #ifdef PNG_PROGRESSIVE_READ_SUPPORTED - png_progressive_info_ptr info_fn; /* called after header data fully read */ - png_progressive_row_ptr row_fn; /* called after each prog. row is decoded */ - png_progressive_end_ptr end_fn; /* called after image is complete */ - png_bytep save_buffer_ptr; /* current location in save_buffer */ - png_bytep save_buffer; /* buffer for previously read data */ - png_bytep current_buffer_ptr; /* current location in current_buffer */ - png_bytep current_buffer; /* buffer for recently used data */ - png_uint_32 push_length; /* size of current input chunk */ - png_uint_32 skip_length; /* bytes to skip in input data */ - png_size_t save_buffer_size; /* amount of data now in save_buffer */ - png_size_t save_buffer_max; /* total size of save_buffer */ - png_size_t buffer_size; /* total amount of available input data */ - png_size_t current_buffer_size; /* amount of data now in current_buffer */ - int process_mode; /* what push library is currently doing */ - int cur_palette; /* current push library palette index */ - -# if defined(PNG_TEXT_SUPPORTED) - png_size_t current_text_size; /* current size of text input data */ - png_size_t current_text_left; /* how much text left to read in input */ - png_charp current_text; /* current text chunk buffer */ - png_charp current_text_ptr; /* current location in current_text */ + png_progressive_info_ptr info_fn PNG_DEPSTRUCT; /* called after header + data fully read */ + png_progressive_row_ptr row_fn PNG_DEPSTRUCT; /* called after each + prog. row is decoded */ + png_progressive_end_ptr end_fn PNG_DEPSTRUCT; /* called after image + is complete */ + png_bytep save_buffer_ptr PNG_DEPSTRUCT; /* current location in + save_buffer */ + png_bytep save_buffer PNG_DEPSTRUCT; /* buffer for previously + read data */ + png_bytep current_buffer_ptr PNG_DEPSTRUCT; /* current location in + current_buffer */ + png_bytep current_buffer PNG_DEPSTRUCT; /* buffer for recently + used data */ + png_uint_32 push_length PNG_DEPSTRUCT; /* size of current input + chunk */ + png_uint_32 skip_length PNG_DEPSTRUCT; /* bytes to skip in + input data */ + png_size_t save_buffer_size PNG_DEPSTRUCT; /* amount of data now + in save_buffer */ + png_size_t save_buffer_max PNG_DEPSTRUCT; /* total size of + save_buffer */ + png_size_t buffer_size PNG_DEPSTRUCT; /* total amount of + available input data */ + png_size_t current_buffer_size PNG_DEPSTRUCT; /* amount of data now + in current_buffer */ + int process_mode PNG_DEPSTRUCT; /* what push library + is currently doing */ + int cur_palette PNG_DEPSTRUCT; /* current push library + palette index */ + +# ifdef PNG_TEXT_SUPPORTED + png_size_t current_text_size PNG_DEPSTRUCT; /* current size of + text input data */ + png_size_t current_text_left PNG_DEPSTRUCT; /* how much text left + to read in input */ + png_charp current_text PNG_DEPSTRUCT; /* current text chunk + buffer */ + png_charp current_text_ptr PNG_DEPSTRUCT; /* current location + in current_text */ # endif /* PNG_PROGRESSIVE_READ_SUPPORTED && PNG_TEXT_SUPPORTED */ #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ #if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) -/* for the Borland special 64K segment handler */ - png_bytepp offset_table_ptr; - png_bytep offset_table; - png_uint_16 offset_table_number; - png_uint_16 offset_table_count; - png_uint_16 offset_table_count_free; +/* For the Borland special 64K segment handler */ + png_bytepp offset_table_ptr PNG_DEPSTRUCT; + png_bytep offset_table PNG_DEPSTRUCT; + png_uint_16 offset_table_number PNG_DEPSTRUCT; + png_uint_16 offset_table_count PNG_DEPSTRUCT; + png_uint_16 offset_table_count_free PNG_DEPSTRUCT; #endif -#if defined(PNG_READ_DITHER_SUPPORTED) - png_bytep palette_lookup; /* lookup table for dithering */ - png_bytep dither_index; /* index translation for palette files */ +#ifdef PNG_READ_QUANTIZE_SUPPORTED + png_bytep palette_lookup PNG_DEPSTRUCT; /* lookup table for quantizing */ + png_bytep quantize_index PNG_DEPSTRUCT; /* index translation for palette + files */ #endif -#if defined(PNG_READ_DITHER_SUPPORTED) || defined(PNG_hIST_SUPPORTED) - png_uint_16p hist; /* histogram */ +#if defined(PNG_READ_QUANTIZE_SUPPORTED) || defined(PNG_hIST_SUPPORTED) + png_uint_16p hist PNG_DEPSTRUCT; /* histogram */ #endif -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) - png_byte heuristic_method; /* heuristic for row filter selection */ - png_byte num_prev_filters; /* number of weights for previous rows */ - png_bytep prev_filters; /* filter type(s) of previous row(s) */ - png_uint_16p filter_weights; /* weight(s) for previous line(s) */ - png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */ - png_uint_16p filter_costs; /* relative filter calculation cost */ - png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */ +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED + png_byte heuristic_method PNG_DEPSTRUCT; /* heuristic for row + filter selection */ + png_byte num_prev_filters PNG_DEPSTRUCT; /* number of weights + for previous rows */ + png_bytep prev_filters PNG_DEPSTRUCT; /* filter type(s) of + previous row(s) */ + png_uint_16p filter_weights PNG_DEPSTRUCT; /* weight(s) for previous + line(s) */ + png_uint_16p inv_filter_weights PNG_DEPSTRUCT; /* 1/weight(s) for + previous line(s) */ + png_uint_16p filter_costs PNG_DEPSTRUCT; /* relative filter + calculation cost */ + png_uint_16p inv_filter_costs PNG_DEPSTRUCT; /* 1/relative filter + calculation cost */ #endif -#if defined(PNG_TIME_RFC1123_SUPPORTED) - png_charp time_buffer; /* String to hold RFC 1123 time text */ +#ifdef PNG_TIME_RFC1123_SUPPORTED + png_charp time_buffer PNG_DEPSTRUCT; /* String to hold RFC 1123 time text */ #endif /* New members added in libpng-1.0.6 */ -#ifdef PNG_FREE_ME_SUPPORTED - png_uint_32 free_me; /* flags items libpng is responsible for freeing */ -#endif + png_uint_32 free_me PNG_DEPSTRUCT; /* flags items libpng is + responsible for freeing */ -#if defined(PNG_USER_CHUNKS_SUPPORTED) - png_voidp user_chunk_ptr; - png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */ +#ifdef PNG_USER_CHUNKS_SUPPORTED + png_voidp user_chunk_ptr PNG_DEPSTRUCT; + png_user_chunk_ptr read_user_chunk_fn PNG_DEPSTRUCT; /* user read + chunk handler */ #endif -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) - int num_chunk_list; - png_bytep chunk_list; +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + int num_chunk_list PNG_DEPSTRUCT; + png_bytep chunk_list PNG_DEPSTRUCT; #endif /* New members added in libpng-1.0.3 */ -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) - png_byte rgb_to_gray_status; +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + png_byte rgb_to_gray_status PNG_DEPSTRUCT; /* These were changed from png_byte in libpng-1.0.6 */ - png_uint_16 rgb_to_gray_red_coeff; - png_uint_16 rgb_to_gray_green_coeff; - png_uint_16 rgb_to_gray_blue_coeff; + png_uint_16 rgb_to_gray_red_coeff PNG_DEPSTRUCT; + png_uint_16 rgb_to_gray_green_coeff PNG_DEPSTRUCT; + png_uint_16 rgb_to_gray_blue_coeff PNG_DEPSTRUCT; #endif /* New member added in libpng-1.0.4 (renamed in 1.0.9) */ #if defined(PNG_MNG_FEATURES_SUPPORTED) || \ defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) -/* changed from png_byte to png_uint_32 at version 1.2.0 */ -#ifdef PNG_1_0_X - png_byte mng_features_permitted; -#else - png_uint_32 mng_features_permitted; -#endif /* PNG_1_0_X */ +/* Changed from png_byte to png_uint_32 at version 1.2.0 */ + png_uint_32 mng_features_permitted PNG_DEPSTRUCT; #endif /* New member added in libpng-1.0.7 */ #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) - png_fixed_point int_gamma; + png_fixed_point int_gamma PNG_DEPSTRUCT; #endif /* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */ -#if defined(PNG_MNG_FEATURES_SUPPORTED) - png_byte filter_type; -#endif - -#if defined(PNG_1_0_X) || (defined(PNG_DEBUG) && defined(PNG_USE_PNGGCCRD)) -/* New member added in libpng-1.0.10, ifdef'ed out in 1.2.0 */ - png_uint_32 row_buf_size; +#ifdef PNG_MNG_FEATURES_SUPPORTED + png_byte filter_type PNG_DEPSTRUCT; #endif /* New members added in libpng-1.2.0 */ -#if !defined(PNG_1_0_X) && defined(PNG_ASSEMBLER_CODE_SUPPORTED) - png_byte mmx_bitdepth_threshold; - png_uint_32 mmx_rowbytes_threshold; - png_uint_32 asm_flags; -#endif /* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */ #ifdef PNG_USER_MEM_SUPPORTED - png_voidp mem_ptr; /* user supplied struct for mem functions */ - png_malloc_ptr malloc_fn; /* function for allocating memory */ - png_free_ptr free_fn; /* function for freeing memory */ + png_voidp mem_ptr PNG_DEPSTRUCT; /* user supplied struct for + mem functions */ + png_malloc_ptr malloc_fn PNG_DEPSTRUCT; /* function for + allocating memory */ + png_free_ptr free_fn PNG_DEPSTRUCT; /* function for + freeing memory */ #endif /* New member added in libpng-1.0.13 and 1.2.0 */ - png_bytep big_row_buf; /* buffer to save current (unfiltered) row */ + png_bytep big_row_buf PNG_DEPSTRUCT; /* buffer to save current + (unfiltered) row */ -#if defined(PNG_READ_DITHER_SUPPORTED) +#ifdef PNG_READ_QUANTIZE_SUPPORTED /* The following three members were added at version 1.0.14 and 1.2.4 */ - png_bytep dither_sort; /* working sort array */ - png_bytep index_to_palette; /* where the original index currently is */ - /* in the palette */ - png_bytep palette_to_index; /* which original index points to this */ - /* palette color */ + png_bytep quantize_sort PNG_DEPSTRUCT; /* working sort array */ + png_bytep index_to_palette PNG_DEPSTRUCT; /* where the original + index currently is + in the palette */ + png_bytep palette_to_index PNG_DEPSTRUCT; /* which original index + points to this + palette color */ +#endif + +/* New members added in libpng-1.0.16 and 1.2.6 */ + png_byte compression_type PNG_DEPSTRUCT; + +#ifdef PNG_USER_LIMITS_SUPPORTED + png_uint_32 user_width_max PNG_DEPSTRUCT; + png_uint_32 user_height_max PNG_DEPSTRUCT; + /* Added in libpng-1.4.0: Total number of sPLT, text, and unknown + * chunks that can be stored (0 means unlimited). + */ + png_uint_32 user_chunk_cache_max PNG_DEPSTRUCT; +#endif + +/* New member added in libpng-1.0.25 and 1.2.17 */ +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED + /* Storage for unknown chunk that the library doesn't recognize. */ + png_unknown_chunk unknown_chunk PNG_DEPSTRUCT; #endif +/* New members added in libpng-1.2.26 */ + png_uint_32 old_big_row_buf_size PNG_DEPSTRUCT; + png_uint_32 old_prev_row_size PNG_DEPSTRUCT; + +/* New member added in libpng-1.2.30 */ + png_charp chunkdata PNG_DEPSTRUCT; /* buffer for reading chunk data */ + +#ifdef PNG_IO_STATE_SUPPORTED +/* New member added in libpng-1.4.0 */ + png_uint_32 io_state PNG_DEPSTRUCT; +#endif }; -/* This prevents a compiler error in png.c if png.c and png.h are both at - version 1.2.4 +/* This triggers a compiler error in png.c, if png.c and png.h + * do not agree upon the version number. */ -typedef png_structp version_1_2_4; +typedef png_structp version_1_4_4; typedef png_struct FAR * FAR * png_structpp; @@ -1292,12 +1487,12 @@ typedef png_struct FAR * FAR * png_structpp; */ /* Returns the version number of the library */ -extern PNG_EXPORT(png_uint_32,png_access_version_number) PNGARG((void)); +PNG_EXPORT(png_uint_32,png_access_version_number) PNGARG((void)); /* Tell lib we have already handled the first magic bytes. * Handling more than 8 bytes from the beginning of the file is an error. */ -extern PNG_EXPORT(void,png_set_sig_bytes) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_sig_bytes) PNGARG((png_structp png_ptr, int num_bytes)); /* Check sig[start] through sig[start + num_to_check - 1] to see if it's a @@ -1305,191 +1500,217 @@ extern PNG_EXPORT(void,png_set_sig_bytes) PNGARG((png_structp png_ptr, * signature, and non-zero otherwise. Having num_to_check == 0 or * start > 7 will always fail (ie return non-zero). */ -extern PNG_EXPORT(int,png_sig_cmp) PNGARG((png_bytep sig, png_size_t start, +PNG_EXPORT(int,png_sig_cmp) PNGARG((png_bytep sig, png_size_t start, png_size_t num_to_check)); /* Simple signature checking function. This is the same as calling * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). */ -extern PNG_EXPORT(int,png_check_sig) PNGARG((png_bytep sig, int num)); +#define png_check_sig(sig,n) !png_sig_cmp((sig), 0, (n)) /* Allocate and initialize png_ptr struct for reading, and any other memory. */ -extern PNG_EXPORT(png_structp,png_create_read_struct) +PNG_EXPORT(png_structp,png_create_read_struct) PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn)); + png_error_ptr error_fn, png_error_ptr warn_fn)) PNG_ALLOCATED; /* Allocate and initialize png_ptr struct for writing, and any other memory */ -extern PNG_EXPORT(png_structp,png_create_write_struct) +PNG_EXPORT(png_structp,png_create_write_struct) PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warn_fn)); + png_error_ptr error_fn, png_error_ptr warn_fn)) PNG_ALLOCATED; -extern PNG_EXPORT(png_uint_32,png_get_compression_buffer_size) +PNG_EXPORT(png_size_t,png_get_compression_buffer_size) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(void,png_set_compression_buffer_size) - PNGARG((png_structp png_ptr, png_uint_32 size)); +PNG_EXPORT(void,png_set_compression_buffer_size) + PNGARG((png_structp png_ptr, png_size_t size)); +/* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp + * match up. + */ +#ifdef PNG_SETJMP_SUPPORTED +/* This function returns the jmp_buf built in to *png_ptr. It must be + * supplied with an appropriate 'longjmp' function to use on that jmp_buf + * unless the default error function is overridden in which case NULL is + * acceptable. The size of the jmp_buf is checked against the actual size + * allocated by the library - the call will return NULL on a mismatch + * indicating an ABI mismatch. + */ +PNG_EXPORT(jmp_buf*, png_set_longjmp_fn) + PNGARG((png_structp png_ptr, png_longjmp_ptr longjmp_fn, size_t + jmp_buf_size)); +# define png_jmpbuf(png_ptr) \ + (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf))) +#else +# define png_jmpbuf(png_ptr) \ + (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP) +#endif + +#ifdef PNG_READ_SUPPORTED /* Reset the compression stream */ -extern PNG_EXPORT(int,png_reset_zstream) PNGARG((png_structp png_ptr)); +PNG_EXPORT(int,png_reset_zstream) PNGARG((png_structp png_ptr)); +#endif /* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */ #ifdef PNG_USER_MEM_SUPPORTED -extern PNG_EXPORT(png_structp,png_create_read_struct_2) +PNG_EXPORT(png_structp,png_create_read_struct_2) PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn)); -extern PNG_EXPORT(png_structp,png_create_write_struct_2) + png_malloc_ptr malloc_fn, png_free_ptr free_fn)) PNG_ALLOCATED; +PNG_EXPORT(png_structp,png_create_write_struct_2) PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, - png_malloc_ptr malloc_fn, png_free_ptr free_fn)); + png_malloc_ptr malloc_fn, png_free_ptr free_fn)) PNG_ALLOCATED; #endif +/* Write the PNG file signature. */ +PNG_EXPORT(void,png_write_sig) PNGARG((png_structp png_ptr)); + /* Write a PNG chunk - size, type, (optional) data, CRC. */ -extern PNG_EXPORT(void,png_write_chunk) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_write_chunk) PNGARG((png_structp png_ptr, png_bytep chunk_name, png_bytep data, png_size_t length)); /* Write the start of a PNG chunk - length and chunk name. */ -extern PNG_EXPORT(void,png_write_chunk_start) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_write_chunk_start) PNGARG((png_structp png_ptr, png_bytep chunk_name, png_uint_32 length)); /* Write the data of a PNG chunk started with png_write_chunk_start(). */ -extern PNG_EXPORT(void,png_write_chunk_data) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_write_chunk_data) PNGARG((png_structp png_ptr, png_bytep data, png_size_t length)); /* Finish a chunk started with png_write_chunk_start() (includes CRC). */ -extern PNG_EXPORT(void,png_write_chunk_end) PNGARG((png_structp png_ptr)); +PNG_EXPORT(void,png_write_chunk_end) PNGARG((png_structp png_ptr)); /* Allocate and initialize the info structure */ -extern PNG_EXPORT(png_infop,png_create_info_struct) - PNGARG((png_structp png_ptr)); +PNG_EXPORT(png_infop,png_create_info_struct) + PNGARG((png_structp png_ptr)) PNG_ALLOCATED; -/* Initialize the info structure (old interface - DEPRECATED) */ -extern PNG_EXPORT(void,png_info_init) PNGARG((png_infop info_ptr)); -#undef png_info_init -#define png_info_init(info_ptr) png_info_init_3(&info_ptr, sizeof(png_info)); -extern PNG_EXPORT(void,png_info_init_3) PNGARG((png_infopp info_ptr, +PNG_EXPORT(void,png_info_init_3) PNGARG((png_infopp info_ptr, png_size_t png_info_struct_size)); /* Writes all the PNG information before the image. */ -extern PNG_EXPORT(void,png_write_info_before_PLTE) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_write_info_before_PLTE) PNGARG((png_structp png_ptr, png_infop info_ptr)); -extern PNG_EXPORT(void,png_write_info) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_write_info) PNGARG((png_structp png_ptr, png_infop info_ptr)); -/* read the information before the actual image data. */ -extern PNG_EXPORT(void,png_read_info) PNGARG((png_structp png_ptr, +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read the information before the actual image data. */ +PNG_EXPORT(void,png_read_info) PNGARG((png_structp png_ptr, png_infop info_ptr)); +#endif -#if defined(PNG_TIME_RFC1123_SUPPORTED) -extern PNG_EXPORT(png_charp,png_convert_to_rfc1123) +#ifdef PNG_TIME_RFC1123_SUPPORTED +PNG_EXPORT(png_charp,png_convert_to_rfc1123) PNGARG((png_structp png_ptr, png_timep ptime)); #endif -#if !defined(_WIN32_WCE) -/* "time.h" functions are not supported on WindowsCE */ -#if defined(PNG_WRITE_tIME_SUPPORTED) -/* convert from a struct tm to png_time */ -extern PNG_EXPORT(void,png_convert_from_struct_tm) PNGARG((png_timep ptime, +#ifdef PNG_CONVERT_tIME_SUPPORTED +/* Convert from a struct tm to png_time */ +PNG_EXPORT(void,png_convert_from_struct_tm) PNGARG((png_timep ptime, struct tm FAR * ttime)); -/* convert from time_t to png_time. Uses gmtime() */ -extern PNG_EXPORT(void,png_convert_from_time_t) PNGARG((png_timep ptime, +/* Convert from time_t to png_time. Uses gmtime() */ +PNG_EXPORT(void,png_convert_from_time_t) PNGARG((png_timep ptime, time_t ttime)); -#endif /* PNG_WRITE_tIME_SUPPORTED */ -#endif /* _WIN32_WCE */ +#endif /* PNG_CONVERT_tIME_SUPPORTED */ -#if defined(PNG_READ_EXPAND_SUPPORTED) +#ifdef PNG_READ_EXPAND_SUPPORTED /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ -extern PNG_EXPORT(void,png_set_expand) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(void,png_set_gray_1_2_4_to_8) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(void,png_set_palette_to_rgb) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(void,png_set_tRNS_to_alpha) PNGARG((png_structp png_ptr)); +PNG_EXPORT(void,png_set_expand) PNGARG((png_structp png_ptr)); +PNG_EXPORT(void,png_set_expand_gray_1_2_4_to_8) PNGARG((png_structp + png_ptr)); +PNG_EXPORT(void,png_set_palette_to_rgb) PNGARG((png_structp png_ptr)); +PNG_EXPORT(void,png_set_tRNS_to_alpha) PNGARG((png_structp png_ptr)); #endif #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) /* Use blue, green, red order for pixels. */ -extern PNG_EXPORT(void,png_set_bgr) PNGARG((png_structp png_ptr)); +PNG_EXPORT(void,png_set_bgr) PNGARG((png_structp png_ptr)); #endif -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED /* Expand the grayscale to 24-bit RGB if necessary. */ -extern PNG_EXPORT(void,png_set_gray_to_rgb) PNGARG((png_structp png_ptr)); +PNG_EXPORT(void,png_set_gray_to_rgb) PNGARG((png_structp png_ptr)); #endif -#if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED /* Reduce RGB to grayscale. */ #ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_rgb_to_gray) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_rgb_to_gray) PNGARG((png_structp png_ptr, int error_action, double red, double green )); #endif -extern PNG_EXPORT(void,png_set_rgb_to_gray_fixed) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_rgb_to_gray_fixed) PNGARG((png_structp png_ptr, int error_action, png_fixed_point red, png_fixed_point green )); -extern PNG_EXPORT(png_byte,png_get_rgb_to_gray_status) PNGARG((png_structp +PNG_EXPORT(png_byte,png_get_rgb_to_gray_status) PNGARG((png_structp png_ptr)); #endif -extern PNG_EXPORT(void,png_build_grayscale_palette) PNGARG((int bit_depth, +PNG_EXPORT(void,png_build_grayscale_palette) PNGARG((int bit_depth, png_colorp palette)); -#if defined(PNG_READ_STRIP_ALPHA_SUPPORTED) -extern PNG_EXPORT(void,png_set_strip_alpha) PNGARG((png_structp png_ptr)); +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED +PNG_EXPORT(void,png_set_strip_alpha) PNGARG((png_structp png_ptr)); #endif #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -extern PNG_EXPORT(void,png_set_swap_alpha) PNGARG((png_structp png_ptr)); +PNG_EXPORT(void,png_set_swap_alpha) PNGARG((png_structp png_ptr)); #endif #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) -extern PNG_EXPORT(void,png_set_invert_alpha) PNGARG((png_structp png_ptr)); +PNG_EXPORT(void,png_set_invert_alpha) PNGARG((png_structp png_ptr)); #endif #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) -/* Add a filler byte to 24-bit RGB images. */ -extern PNG_EXPORT(void,png_set_filler) PNGARG((png_structp png_ptr, +/* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ +PNG_EXPORT(void,png_set_filler) PNGARG((png_structp png_ptr, png_uint_32 filler, int flags)); /* The values of the PNG_FILLER_ defines should NOT be changed */ #define PNG_FILLER_BEFORE 0 #define PNG_FILLER_AFTER 1 +/* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ +PNG_EXPORT(void,png_set_add_alpha) PNGARG((png_structp png_ptr, + png_uint_32 filler, int flags)); #endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) /* Swap bytes in 16-bit depth files. */ -extern PNG_EXPORT(void,png_set_swap) PNGARG((png_structp png_ptr)); +PNG_EXPORT(void,png_set_swap) PNGARG((png_structp png_ptr)); #endif #if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) /* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ -extern PNG_EXPORT(void,png_set_packing) PNGARG((png_structp png_ptr)); +PNG_EXPORT(void,png_set_packing) PNGARG((png_structp png_ptr)); #endif -#if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED) +#if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ + defined(PNG_WRITE_PACKSWAP_SUPPORTED) /* Swap packing order of pixels in bytes. */ -extern PNG_EXPORT(void,png_set_packswap) PNGARG((png_structp png_ptr)); +PNG_EXPORT(void,png_set_packswap) PNGARG((png_structp png_ptr)); #endif #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) /* Converts files to legal bit depths. */ -extern PNG_EXPORT(void,png_set_shift) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_shift) PNGARG((png_structp png_ptr, png_color_8p true_bits)); #endif #if defined(PNG_READ_INTERLACING_SUPPORTED) || \ defined(PNG_WRITE_INTERLACING_SUPPORTED) /* Have the code handle the interlacing. Returns the number of passes. */ -extern PNG_EXPORT(int,png_set_interlace_handling) PNGARG((png_structp png_ptr)); +PNG_EXPORT(int,png_set_interlace_handling) PNGARG((png_structp png_ptr)); #endif #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) /* Invert monochrome files */ -extern PNG_EXPORT(void,png_set_invert_mono) PNGARG((png_structp png_ptr)); +PNG_EXPORT(void,png_set_invert_mono) PNGARG((png_structp png_ptr)); #endif -#if defined(PNG_READ_BACKGROUND_SUPPORTED) +#ifdef PNG_READ_BACKGROUND_SUPPORTED /* Handle alpha and tRNS by replacing with a background color. */ #ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_background) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_background) PNGARG((png_structp png_ptr, png_color_16p background_color, int background_gamma_code, int need_expand, double background_gamma)); #endif @@ -1499,102 +1720,100 @@ extern PNG_EXPORT(void,png_set_background) PNGARG((png_structp png_ptr, #define PNG_BACKGROUND_GAMMA_UNIQUE 3 #endif -#if defined(PNG_READ_16_TO_8_SUPPORTED) -/* strip the second byte of information from a 16-bit depth file. */ -extern PNG_EXPORT(void,png_set_strip_16) PNGARG((png_structp png_ptr)); +#ifdef PNG_READ_16_TO_8_SUPPORTED +/* Strip the second byte of information from a 16-bit depth file. */ +PNG_EXPORT(void,png_set_strip_16) PNGARG((png_structp png_ptr)); #endif -#if defined(PNG_READ_DITHER_SUPPORTED) -/* Turn on dithering, and reduce the palette to the number of colors available. */ -extern PNG_EXPORT(void,png_set_dither) PNGARG((png_structp png_ptr, +#ifdef PNG_READ_QUANTIZE_SUPPORTED +/* Turn on quantizing, and reduce the palette to the number of colors + * available. Prior to libpng-1.4.2, this was png_set_dither(). + */ +PNG_EXPORT(void,png_set_quantize) PNGARG((png_structp png_ptr, png_colorp palette, int num_palette, int maximum_colors, - png_uint_16p histogram, int full_dither)); + png_uint_16p histogram, int full_quantize)); #endif +/* This migration aid will be removed from libpng-1.5.0 */ +#define png_set_dither png_set_quantize -#if defined(PNG_READ_GAMMA_SUPPORTED) +#ifdef PNG_READ_GAMMA_SUPPORTED /* Handle gamma correction. Screen_gamma=(display_exponent) */ #ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_gamma) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_gamma) PNGARG((png_structp png_ptr, double screen_gamma, double default_file_gamma)); #endif #endif -#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ - defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) -/* Permit or disallow empty PLTE (0: not permitted, 1: permitted) */ -/* Deprecated and will be removed. Use png_permit_mng_features() instead. */ -extern PNG_EXPORT(void,png_permit_empty_plte) PNGARG((png_structp png_ptr, - int empty_plte_permitted)); -#endif -#if defined(PNG_WRITE_FLUSH_SUPPORTED) +#ifdef PNG_WRITE_FLUSH_SUPPORTED /* Set how many lines between output flushes - 0 for no flushing */ -extern PNG_EXPORT(void,png_set_flush) PNGARG((png_structp png_ptr, int nrows)); +PNG_EXPORT(void,png_set_flush) PNGARG((png_structp png_ptr, int nrows)); /* Flush the current PNG output buffer */ -extern PNG_EXPORT(void,png_write_flush) PNGARG((png_structp png_ptr)); +PNG_EXPORT(void,png_write_flush) PNGARG((png_structp png_ptr)); #endif -/* optional update palette with requested transformations */ -extern PNG_EXPORT(void,png_start_read_image) PNGARG((png_structp png_ptr)); +/* Optional update palette with requested transformations */ +PNG_EXPORT(void,png_start_read_image) PNGARG((png_structp png_ptr)); -/* optional call to update the users info structure */ -extern PNG_EXPORT(void,png_read_update_info) PNGARG((png_structp png_ptr, +/* Optional call to update the users info structure */ +PNG_EXPORT(void,png_read_update_info) PNGARG((png_structp png_ptr, png_infop info_ptr)); -/* read one or more rows of image data. */ -extern PNG_EXPORT(void,png_read_rows) PNGARG((png_structp png_ptr, +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read one or more rows of image data. */ +PNG_EXPORT(void,png_read_rows) PNGARG((png_structp png_ptr, png_bytepp row, png_bytepp display_row, png_uint_32 num_rows)); +#endif -/* read a row of data. */ -extern PNG_EXPORT(void,png_read_row) PNGARG((png_structp png_ptr, +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read a row of data. */ +PNG_EXPORT(void,png_read_row) PNGARG((png_structp png_ptr, png_bytep row, png_bytep display_row)); +#endif -/* read the whole image into memory at once. */ -extern PNG_EXPORT(void,png_read_image) PNGARG((png_structp png_ptr, +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read the whole image into memory at once. */ +PNG_EXPORT(void,png_read_image) PNGARG((png_structp png_ptr, png_bytepp image)); +#endif -/* write a row of image data */ -extern PNG_EXPORT(void,png_write_row) PNGARG((png_structp png_ptr, +/* Write a row of image data */ +PNG_EXPORT(void,png_write_row) PNGARG((png_structp png_ptr, png_bytep row)); -/* write a few rows of image data */ -extern PNG_EXPORT(void,png_write_rows) PNGARG((png_structp png_ptr, +/* Write a few rows of image data */ +PNG_EXPORT(void,png_write_rows) PNGARG((png_structp png_ptr, png_bytepp row, png_uint_32 num_rows)); -/* write the image data */ -extern PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr, +/* Write the image data */ +PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr, png_bytepp image)); -/* writes the end of the PNG file. */ -extern PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr, +/* Write the end of the PNG file. */ +PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr, png_infop info_ptr)); -/* read the end of the PNG file. */ -extern PNG_EXPORT(void,png_read_end) PNGARG((png_structp png_ptr, +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read the end of the PNG file. */ +PNG_EXPORT(void,png_read_end) PNGARG((png_structp png_ptr, png_infop info_ptr)); +#endif -/* free any memory associated with the png_info_struct */ -extern PNG_EXPORT(void,png_destroy_info_struct) PNGARG((png_structp png_ptr, +/* Free any memory associated with the png_info_struct */ +PNG_EXPORT(void,png_destroy_info_struct) PNGARG((png_structp png_ptr, png_infopp info_ptr_ptr)); -/* free any memory associated with the png_struct and the png_info_structs */ -extern PNG_EXPORT(void,png_destroy_read_struct) PNGARG((png_structpp +/* Free any memory associated with the png_struct and the png_info_structs */ +PNG_EXPORT(void,png_destroy_read_struct) PNGARG((png_structpp png_ptr_ptr, png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); -/* 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 associated with the png_struct and the png_info_structs */ -extern PNG_EXPORT(void,png_destroy_write_struct) +/* Free any memory associated with the png_struct and the png_info_structs */ +PNG_EXPORT(void,png_destroy_write_struct) PNGARG((png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)); -/* free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */ -extern void png_write_destroy PNGARG((png_structp png_ptr)); - -/* set the libpng method of handling chunk CRC errors */ -extern PNG_EXPORT(void,png_set_crc_action) PNGARG((png_structp png_ptr, +/* Set the libpng method of handling chunk CRC errors */ +PNG_EXPORT(void,png_set_crc_action) PNGARG((png_structp png_ptr, int crit_action, int ancil_action)); /* Values for png_set_crc_action() to say how to handle CRC errors in @@ -1621,10 +1840,10 @@ extern PNG_EXPORT(void,png_set_crc_action) PNGARG((png_structp png_ptr, * header file (zlib.h) for an explination of the compression functions. */ -/* set the filtering method(s) used by libpng. Currently, the only valid +/* Set the filtering method(s) used by libpng. Currently, the only valid * value for "method" is 0. */ -extern PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method, +PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method, int filters)); /* Flags for png_set_filter() to say which filters to use. The flags @@ -1651,7 +1870,7 @@ extern PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method, #define PNG_FILTER_VALUE_PAETH 4 #define PNG_FILTER_VALUE_LAST 5 -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) /* EXPERIMENTAL */ +#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* EXPERIMENTAL */ /* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_ * defines, either the default (minimum-sum-of-absolute-differences), or * the experimental method (weighted-minimum-sum-of-absolute-differences). @@ -1681,7 +1900,7 @@ extern PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method, * to the UNWEIGHTED method, but with added encoding time/computation. */ #ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr, int heuristic_method, int num_weights, png_doublep filter_weights, png_doublep filter_costs)); #endif @@ -1702,19 +1921,19 @@ extern PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr, * for PNG images, and do considerably fewer caclulations. In the future, * these values may not correspond directly to the zlib compression levels. */ -extern PNG_EXPORT(void,png_set_compression_level) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_compression_level) PNGARG((png_structp png_ptr, int level)); -extern PNG_EXPORT(void,png_set_compression_mem_level) +PNG_EXPORT(void,png_set_compression_mem_level) PNGARG((png_structp png_ptr, int mem_level)); -extern PNG_EXPORT(void,png_set_compression_strategy) +PNG_EXPORT(void,png_set_compression_strategy) PNGARG((png_structp png_ptr, int strategy)); -extern PNG_EXPORT(void,png_set_compression_window_bits) +PNG_EXPORT(void,png_set_compression_window_bits) PNGARG((png_structp png_ptr, int window_bits)); -extern PNG_EXPORT(void,png_set_compression_method) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_compression_method) PNGARG((png_structp png_ptr, int method)); /* These next functions are called for input/output, memory, and error @@ -1726,9 +1945,10 @@ extern PNG_EXPORT(void,png_set_compression_method) PNGARG((png_structp png_ptr, * more information. */ -#if !defined(PNG_NO_STDIO) +#ifdef PNG_STDIO_SUPPORTED /* Initialize the input/output for the PNG file to the default functions. */ -extern PNG_EXPORT(void,png_init_io) PNGARG((png_structp png_ptr, png_FILE_p fp)); +PNG_EXPORT(void,png_init_io) PNGARG((png_structp png_ptr, + png_FILE_p fp)); #endif /* Replace the (error and abort), and warning functions with user @@ -1739,68 +1959,70 @@ extern PNG_EXPORT(void,png_init_io) PNGARG((png_structp png_ptr, png_FILE_p fp)) * default function will be used. */ -extern PNG_EXPORT(void,png_set_error_fn) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_error_fn) PNGARG((png_structp png_ptr, png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn)); /* Return the user pointer associated with the error functions */ -extern PNG_EXPORT(png_voidp,png_get_error_ptr) PNGARG((png_structp png_ptr)); +PNG_EXPORT(png_voidp,png_get_error_ptr) PNGARG((png_structp png_ptr)); /* Replace the default data output functions with a user supplied one(s). * If buffered output is not used, then output_flush_fn can be set to NULL. * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time * output_flush_fn will be ignored (and thus can be NULL). + * It is probably a mistake to use NULL for output_flush_fn if + * write_data_fn is not also NULL unless you have built libpng with + * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's + * default flush function, which uses the standard *FILE structure, will + * be used. */ -extern PNG_EXPORT(void,png_set_write_fn) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_write_fn) PNGARG((png_structp png_ptr, png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); /* Replace the default data input function with a user supplied one. */ -extern PNG_EXPORT(void,png_set_read_fn) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_read_fn) PNGARG((png_structp png_ptr, png_voidp io_ptr, png_rw_ptr read_data_fn)); /* Return the user pointer associated with the I/O functions */ -extern PNG_EXPORT(png_voidp,png_get_io_ptr) PNGARG((png_structp png_ptr)); +PNG_EXPORT(png_voidp,png_get_io_ptr) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(void,png_set_read_status_fn) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_read_status_fn) PNGARG((png_structp png_ptr, png_read_status_ptr read_row_fn)); -extern PNG_EXPORT(void,png_set_write_status_fn) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_write_status_fn) PNGARG((png_structp png_ptr, png_write_status_ptr write_row_fn)); #ifdef PNG_USER_MEM_SUPPORTED /* Replace the default memory allocation functions with user supplied one(s). */ -extern PNG_EXPORT(void,png_set_mem_fn) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_mem_fn) PNGARG((png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn)); /* Return the user pointer associated with the memory functions */ -extern PNG_EXPORT(png_voidp,png_get_mem_ptr) PNGARG((png_structp png_ptr)); +PNG_EXPORT(png_voidp,png_get_mem_ptr) PNGARG((png_structp png_ptr)); #endif -#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_LEGACY_SUPPORTED) -extern PNG_EXPORT(void,png_set_read_user_transform_fn) PNGARG((png_structp +#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED +PNG_EXPORT(void,png_set_read_user_transform_fn) PNGARG((png_structp png_ptr, png_user_transform_ptr read_user_transform_fn)); #endif -#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_LEGACY_SUPPORTED) -extern PNG_EXPORT(void,png_set_write_user_transform_fn) PNGARG((png_structp +#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED +PNG_EXPORT(void,png_set_write_user_transform_fn) PNGARG((png_structp png_ptr, png_user_transform_ptr write_user_transform_fn)); #endif #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ - defined(PNG_LEGACY_SUPPORTED) -extern PNG_EXPORT(void,png_set_user_transform_info) PNGARG((png_structp + defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) +PNG_EXPORT(void,png_set_user_transform_info) PNGARG((png_structp png_ptr, png_voidp user_transform_ptr, int user_transform_depth, int user_transform_channels)); /* Return the user pointer associated with the user transform functions */ -extern PNG_EXPORT(png_voidp,png_get_user_transform_ptr) +PNG_EXPORT(png_voidp,png_get_user_transform_ptr) PNGARG((png_structp png_ptr)); #endif #ifdef PNG_USER_CHUNKS_SUPPORTED -extern PNG_EXPORT(void,png_set_read_user_chunk_fn) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_read_user_chunk_fn) PNGARG((png_structp png_ptr, png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); -extern PNG_EXPORT(png_voidp,png_get_user_chunk_ptr) PNGARG((png_structp +PNG_EXPORT(png_voidp,png_get_user_chunk_ptr) PNGARG((png_structp png_ptr)); #endif @@ -1808,59 +2030,47 @@ extern PNG_EXPORT(png_voidp,png_get_user_chunk_ptr) PNGARG((png_structp /* Sets the function callbacks for the push reader, and a pointer to a * user-defined structure available to the callback functions. */ -extern PNG_EXPORT(void,png_set_progressive_read_fn) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_progressive_read_fn) PNGARG((png_structp png_ptr, png_voidp progressive_ptr, png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn)); -/* returns the user pointer associated with the push read functions */ -extern PNG_EXPORT(png_voidp,png_get_progressive_ptr) +/* Returns the user pointer associated with the push read functions */ +PNG_EXPORT(png_voidp,png_get_progressive_ptr) PNGARG((png_structp png_ptr)); -/* function to be called when data becomes available */ -extern PNG_EXPORT(void,png_process_data) PNGARG((png_structp png_ptr, +/* Function to be called when data becomes available */ +PNG_EXPORT(void,png_process_data) PNGARG((png_structp png_ptr, png_infop info_ptr, png_bytep buffer, png_size_t buffer_size)); -/* function that combines rows. Not very much different than the +/* Function that combines rows. Not very much different than the * png_combine_row() call. Is this even used????? */ -extern PNG_EXPORT(void,png_progressive_combine_row) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_progressive_combine_row) PNGARG((png_structp png_ptr, png_bytep old_row, png_bytep new_row)); #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ -extern PNG_EXPORT(png_voidp,png_malloc) PNGARG((png_structp png_ptr, - png_uint_32 size)); +PNG_EXPORT(png_voidp,png_malloc) PNGARG((png_structp png_ptr, + png_alloc_size_t size)) PNG_ALLOCATED; +/* Added at libpng version 1.4.0 */ +PNG_EXPORT(png_voidp,png_calloc) PNGARG((png_structp png_ptr, + png_alloc_size_t size)) PNG_ALLOCATED; -#if defined(PNG_1_0_X) -# define png_malloc_warn png_malloc -#else /* Added at libpng version 1.2.4 */ -extern PNG_EXPORT(png_voidp,png_malloc_warn) PNGARG((png_structp png_ptr, - png_uint_32 size)); -#endif - -/* frees a pointer allocated by png_malloc() */ -extern PNG_EXPORT(void,png_free) PNGARG((png_structp png_ptr, png_voidp ptr)); +PNG_EXPORT(png_voidp,png_malloc_warn) PNGARG((png_structp png_ptr, + png_alloc_size_t size)) PNG_ALLOCATED; -#if defined(PNG_1_0_X) -/* Function to allocate memory for zlib. */ -extern PNG_EXPORT(voidpf,png_zalloc) PNGARG((voidpf png_ptr, uInt items, - uInt size)); - -/* Function to free memory for zlib */ -extern PNG_EXPORT(void,png_zfree) PNGARG((voidpf png_ptr, voidpf ptr)); -#endif +/* Frees a pointer allocated by png_malloc() */ +PNG_EXPORT(void,png_free) PNGARG((png_structp png_ptr, png_voidp ptr)); /* Free data that was allocated internally */ -extern PNG_EXPORT(void,png_free_data) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_free_data) PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num)); -#ifdef PNG_FREE_ME_SUPPORTED /* Reassign responsibility for freeing existing data, whether allocated * by libpng or by the application */ -extern PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask)); -#endif -/* assignments for png_data_freer */ +/* Assignments for png_data_freer */ #define PNG_DESTROY_WILL_FREE_DATA 1 #define PNG_SET_WILL_FREE_DATA 1 #define PNG_USER_WILL_FREE_DATA 2 @@ -1880,39 +2090,48 @@ extern PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr, #define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ #ifdef PNG_USER_MEM_SUPPORTED -extern PNG_EXPORT(png_voidp,png_malloc_default) PNGARG((png_structp png_ptr, - png_uint_32 size)); -extern PNG_EXPORT(void,png_free_default) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_voidp,png_malloc_default) PNGARG((png_structp png_ptr, + png_alloc_size_t size)) PNG_ALLOCATED; +PNG_EXPORT(void,png_free_default) PNGARG((png_structp png_ptr, png_voidp ptr)); #endif -extern PNG_EXPORT(png_voidp,png_memcpy_check) PNGARG((png_structp png_ptr, - png_voidp s1, png_voidp s2, png_uint_32 size)); - -extern PNG_EXPORT(png_voidp,png_memset_check) PNGARG((png_structp png_ptr, - png_voidp s1, int value, png_uint_32 size)); - -#if defined(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 */ - +#ifndef PNG_NO_ERROR_TEXT /* Fatal error in PNG image of libpng - can't continue */ -extern PNG_EXPORT(void,png_error) PNGARG((png_structp png_ptr, - png_const_charp error_message)); +PNG_EXPORT(void,png_error) PNGARG((png_structp png_ptr, + png_const_charp error_message)) PNG_NORETURN; /* The same, but the chunk name is prepended to the error string. */ -extern PNG_EXPORT(void,png_chunk_error) PNGARG((png_structp png_ptr, - png_const_charp error_message)); +PNG_EXPORT(void,png_chunk_error) PNGARG((png_structp png_ptr, + png_const_charp error_message)) PNG_NORETURN; + +#else +/* Fatal error in PNG image of libpng - can't continue */ +PNG_EXPORT(void,png_err) PNGARG((png_structp png_ptr)) PNG_NORETURN; +#endif /* Non-fatal error in libpng. Can continue, but may have a problem. */ -extern PNG_EXPORT(void,png_warning) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_warning) PNGARG((png_structp png_ptr, png_const_charp warning_message)); /* Non-fatal error in libpng, chunk name is prepended to message. */ -extern PNG_EXPORT(void,png_chunk_warning) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_chunk_warning) PNGARG((png_structp png_ptr, png_const_charp warning_message)); +#ifdef PNG_BENIGN_ERRORS_SUPPORTED +/* Benign error in libpng. Can continue, but may have a problem. + * User can choose whether to handle as a fatal error or as a warning. */ +PNG_EXPORT(void,png_benign_error) PNGARG((png_structp png_ptr, + png_const_charp warning_message)); + +/* Same, chunk name is prepended to message. */ +PNG_EXPORT(void,png_chunk_benign_error) PNGARG((png_structp png_ptr, + png_const_charp warning_message)); + +PNG_EXPORT(void,png_set_benign_errors) PNGARG((png_structp + png_ptr, int allowed)); +#endif + /* The png_set_ functions are for storing values in the png_info_struct. * Similarly, the png_get_ calls are used to read values from the * png_info_struct, either storing the parameters in the passed variables, or @@ -1926,106 +2145,108 @@ extern PNG_EXPORT(void,png_chunk_warning) PNGARG((png_structp png_ptr, * png_info_struct. */ /* Returns "flag" if chunk data is valid in info_ptr. */ -extern PNG_EXPORT(png_uint_32,png_get_valid) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_uint_32,png_get_valid) PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 flag)); /* Returns number of bytes needed to hold a transformed row. */ -extern PNG_EXPORT(png_uint_32,png_get_rowbytes) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_size_t,png_get_rowbytes) PNGARG((png_structp png_ptr, png_infop info_ptr)); -#if defined(PNG_INFO_IMAGE_SUPPORTED) +#ifdef PNG_INFO_IMAGE_SUPPORTED /* Returns row_pointers, which is an array of pointers to scanlines that was -returned from png_read_png(). */ -extern PNG_EXPORT(png_bytepp,png_get_rows) PNGARG((png_structp png_ptr, + * returned from png_read_png(). + */ +PNG_EXPORT(png_bytepp,png_get_rows) PNGARG((png_structp png_ptr, png_infop info_ptr)); /* Set row_pointers, which is an array of pointers to scanlines for use -by png_write_png(). */ -extern PNG_EXPORT(void,png_set_rows) PNGARG((png_structp png_ptr, + * by png_write_png(). + */ +PNG_EXPORT(void,png_set_rows) PNGARG((png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)); #endif /* Returns number of color channels in image. */ -extern PNG_EXPORT(png_byte,png_get_channels) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_byte,png_get_channels) PNGARG((png_structp png_ptr, png_infop info_ptr)); #ifdef PNG_EASY_ACCESS_SUPPORTED /* Returns image width in pixels. */ -extern PNG_EXPORT(png_uint_32, png_get_image_width) PNGARG((png_structp +PNG_EXPORT(png_uint_32, png_get_image_width) PNGARG((png_structp png_ptr, png_infop info_ptr)); /* Returns image height in pixels. */ -extern PNG_EXPORT(png_uint_32, png_get_image_height) PNGARG((png_structp +PNG_EXPORT(png_uint_32, png_get_image_height) PNGARG((png_structp png_ptr, png_infop info_ptr)); /* Returns image bit_depth. */ -extern PNG_EXPORT(png_byte, png_get_bit_depth) PNGARG((png_structp +PNG_EXPORT(png_byte, png_get_bit_depth) PNGARG((png_structp png_ptr, png_infop info_ptr)); /* Returns image color_type. */ -extern PNG_EXPORT(png_byte, png_get_color_type) PNGARG((png_structp +PNG_EXPORT(png_byte, png_get_color_type) PNGARG((png_structp png_ptr, png_infop info_ptr)); /* Returns image filter_type. */ -extern PNG_EXPORT(png_byte, png_get_filter_type) PNGARG((png_structp +PNG_EXPORT(png_byte, png_get_filter_type) PNGARG((png_structp png_ptr, png_infop info_ptr)); /* Returns image interlace_type. */ -extern PNG_EXPORT(png_byte, png_get_interlace_type) PNGARG((png_structp +PNG_EXPORT(png_byte, png_get_interlace_type) PNGARG((png_structp png_ptr, png_infop info_ptr)); /* Returns image compression_type. */ -extern PNG_EXPORT(png_byte, png_get_compression_type) PNGARG((png_structp +PNG_EXPORT(png_byte, png_get_compression_type) PNGARG((png_structp png_ptr, png_infop info_ptr)); /* Returns image resolution in pixels per meter, from pHYs chunk data. */ -extern PNG_EXPORT(png_uint_32, png_get_pixels_per_meter) PNGARG((png_structp +PNG_EXPORT(png_uint_32, png_get_pixels_per_meter) PNGARG((png_structp png_ptr, png_infop info_ptr)); -extern PNG_EXPORT(png_uint_32, png_get_x_pixels_per_meter) PNGARG((png_structp +PNG_EXPORT(png_uint_32, png_get_x_pixels_per_meter) PNGARG((png_structp png_ptr, png_infop info_ptr)); -extern PNG_EXPORT(png_uint_32, png_get_y_pixels_per_meter) PNGARG((png_structp +PNG_EXPORT(png_uint_32, png_get_y_pixels_per_meter) PNGARG((png_structp png_ptr, png_infop info_ptr)); /* Returns pixel aspect ratio, computed from pHYs chunk data. */ #ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(float, png_get_pixel_aspect_ratio) PNGARG((png_structp +PNG_EXPORT(float, png_get_pixel_aspect_ratio) PNGARG((png_structp png_ptr, png_infop info_ptr)); #endif /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ -extern PNG_EXPORT(png_int_32, png_get_x_offset_pixels) PNGARG((png_structp +PNG_EXPORT(png_int_32, png_get_x_offset_pixels) PNGARG((png_structp png_ptr, png_infop info_ptr)); -extern PNG_EXPORT(png_int_32, png_get_y_offset_pixels) PNGARG((png_structp +PNG_EXPORT(png_int_32, png_get_y_offset_pixels) PNGARG((png_structp png_ptr, png_infop info_ptr)); -extern PNG_EXPORT(png_int_32, png_get_x_offset_microns) PNGARG((png_structp +PNG_EXPORT(png_int_32, png_get_x_offset_microns) PNGARG((png_structp png_ptr, png_infop info_ptr)); -extern PNG_EXPORT(png_int_32, png_get_y_offset_microns) PNGARG((png_structp +PNG_EXPORT(png_int_32, png_get_y_offset_microns) PNGARG((png_structp png_ptr, png_infop info_ptr)); #endif /* PNG_EASY_ACCESS_SUPPORTED */ /* Returns pointer to signature string read from PNG header */ -extern PNG_EXPORT(png_bytep,png_get_signature) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_bytep,png_get_signature) PNGARG((png_structp png_ptr, png_infop info_ptr)); -#if defined(PNG_bKGD_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_bKGD) PNGARG((png_structp png_ptr, +#ifdef PNG_bKGD_SUPPORTED +PNG_EXPORT(png_uint_32,png_get_bKGD) PNGARG((png_structp png_ptr, png_infop info_ptr, png_color_16p *background)); #endif -#if defined(PNG_bKGD_SUPPORTED) -extern PNG_EXPORT(void,png_set_bKGD) PNGARG((png_structp png_ptr, +#ifdef PNG_bKGD_SUPPORTED +PNG_EXPORT(void,png_set_bKGD) PNGARG((png_structp png_ptr, png_infop info_ptr, png_color_16p background)); #endif -#if defined(PNG_cHRM_SUPPORTED) +#ifdef PNG_cHRM_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(png_uint_32,png_get_cHRM) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_uint_32,png_get_cHRM) PNGARG((png_structp png_ptr, png_infop info_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 #ifdef PNG_FIXED_POINT_SUPPORTED -extern PNG_EXPORT(png_uint_32,png_get_cHRM_fixed) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_uint_32,png_get_cHRM_fixed) PNGARG((png_structp png_ptr, png_infop info_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 @@ -2033,14 +2254,14 @@ extern PNG_EXPORT(png_uint_32,png_get_cHRM_fixed) PNGARG((png_structp png_ptr, #endif #endif -#if defined(PNG_cHRM_SUPPORTED) +#ifdef PNG_cHRM_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_cHRM) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_cHRM) PNGARG((png_structp png_ptr, png_infop info_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 #ifdef PNG_FIXED_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_cHRM_fixed) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_cHRM_fixed) PNGARG((png_structp png_ptr, png_infop info_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, @@ -2048,380 +2269,329 @@ extern PNG_EXPORT(void,png_set_cHRM_fixed) PNGARG((png_structp png_ptr, #endif #endif -#if defined(PNG_gAMA_SUPPORTED) +#ifdef PNG_gAMA_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(png_uint_32,png_get_gAMA) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_uint_32,png_get_gAMA) PNGARG((png_structp png_ptr, png_infop info_ptr, double *file_gamma)); #endif -extern PNG_EXPORT(png_uint_32,png_get_gAMA_fixed) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_uint_32,png_get_gAMA_fixed) PNGARG((png_structp png_ptr, png_infop info_ptr, png_fixed_point *int_file_gamma)); #endif -#if defined(PNG_gAMA_SUPPORTED) +#ifdef PNG_gAMA_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_gAMA) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_gAMA) PNGARG((png_structp png_ptr, png_infop info_ptr, double file_gamma)); #endif -extern PNG_EXPORT(void,png_set_gAMA_fixed) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_gAMA_fixed) PNGARG((png_structp png_ptr, png_infop info_ptr, png_fixed_point int_file_gamma)); #endif -#if defined(PNG_hIST_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_hIST) PNGARG((png_structp png_ptr, +#ifdef PNG_hIST_SUPPORTED +PNG_EXPORT(png_uint_32,png_get_hIST) PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_16p *hist)); #endif -#if defined(PNG_hIST_SUPPORTED) -extern PNG_EXPORT(void,png_set_hIST) PNGARG((png_structp png_ptr, +#ifdef PNG_hIST_SUPPORTED +PNG_EXPORT(void,png_set_hIST) PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)); #endif -extern PNG_EXPORT(png_uint_32,png_get_IHDR) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_uint_32,png_get_IHDR) PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, int *interlace_method, int *compression_method, int *filter_method)); -extern PNG_EXPORT(void,png_set_IHDR) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_IHDR) PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, int interlace_method, int compression_method, int filter_method)); -#if defined(PNG_oFFs_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_oFFs) PNGARG((png_structp png_ptr, +#ifdef PNG_oFFs_SUPPORTED +PNG_EXPORT(png_uint_32,png_get_oFFs) PNGARG((png_structp png_ptr, png_infop info_ptr, png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)); #endif -#if defined(PNG_oFFs_SUPPORTED) -extern PNG_EXPORT(void,png_set_oFFs) PNGARG((png_structp png_ptr, +#ifdef PNG_oFFs_SUPPORTED +PNG_EXPORT(void,png_set_oFFs) PNGARG((png_structp png_ptr, png_infop info_ptr, png_int_32 offset_x, png_int_32 offset_y, int unit_type)); #endif -#if defined(PNG_pCAL_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_pCAL) PNGARG((png_structp png_ptr, +#ifdef PNG_pCAL_SUPPORTED +PNG_EXPORT(png_uint_32,png_get_pCAL) PNGARG((png_structp png_ptr, png_infop info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, png_charp *units, png_charpp *params)); #endif -#if defined(PNG_pCAL_SUPPORTED) -extern PNG_EXPORT(void,png_set_pCAL) PNGARG((png_structp png_ptr, +#ifdef PNG_pCAL_SUPPORTED +PNG_EXPORT(void,png_set_pCAL) PNGARG((png_structp png_ptr, png_infop info_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, png_charp units, png_charpp params)); #endif -#if defined(PNG_pHYs_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_structp png_ptr, +#ifdef PNG_pHYs_SUPPORTED +PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); #endif -#if defined(PNG_pHYs_SUPPORTED) -extern PNG_EXPORT(void,png_set_pHYs) PNGARG((png_structp png_ptr, +#ifdef PNG_pHYs_SUPPORTED +PNG_EXPORT(void,png_set_pHYs) PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type)); #endif -extern PNG_EXPORT(png_uint_32,png_get_PLTE) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_uint_32,png_get_PLTE) PNGARG((png_structp png_ptr, png_infop info_ptr, png_colorp *palette, int *num_palette)); -extern PNG_EXPORT(void,png_set_PLTE) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_PLTE) PNGARG((png_structp png_ptr, png_infop info_ptr, png_colorp palette, int num_palette)); -#if defined(PNG_sBIT_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_sBIT) PNGARG((png_structp png_ptr, +#ifdef PNG_sBIT_SUPPORTED +PNG_EXPORT(png_uint_32,png_get_sBIT) PNGARG((png_structp png_ptr, png_infop info_ptr, png_color_8p *sig_bit)); #endif -#if defined(PNG_sBIT_SUPPORTED) -extern PNG_EXPORT(void,png_set_sBIT) PNGARG((png_structp png_ptr, +#ifdef PNG_sBIT_SUPPORTED +PNG_EXPORT(void,png_set_sBIT) PNGARG((png_structp png_ptr, png_infop info_ptr, png_color_8p sig_bit)); #endif -#if defined(PNG_sRGB_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_sRGB) PNGARG((png_structp png_ptr, +#ifdef PNG_sRGB_SUPPORTED +PNG_EXPORT(png_uint_32,png_get_sRGB) PNGARG((png_structp png_ptr, png_infop info_ptr, int *intent)); #endif -#if defined(PNG_sRGB_SUPPORTED) -extern PNG_EXPORT(void,png_set_sRGB) PNGARG((png_structp png_ptr, +#ifdef PNG_sRGB_SUPPORTED +PNG_EXPORT(void,png_set_sRGB) PNGARG((png_structp png_ptr, png_infop info_ptr, int intent)); -extern PNG_EXPORT(void,png_set_sRGB_gAMA_and_cHRM) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_sRGB_gAMA_and_cHRM) PNGARG((png_structp png_ptr, png_infop info_ptr, int intent)); #endif -#if defined(PNG_iCCP_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_iCCP) PNGARG((png_structp png_ptr, +#ifdef PNG_iCCP_SUPPORTED +PNG_EXPORT(png_uint_32,png_get_iCCP) PNGARG((png_structp png_ptr, png_infop info_ptr, png_charpp name, int *compression_type, png_charpp profile, png_uint_32 *proflen)); /* Note to maintainer: profile should be png_bytepp */ #endif -#if defined(PNG_iCCP_SUPPORTED) -extern PNG_EXPORT(void,png_set_iCCP) PNGARG((png_structp png_ptr, +#ifdef PNG_iCCP_SUPPORTED +PNG_EXPORT(void,png_set_iCCP) PNGARG((png_structp png_ptr, png_infop info_ptr, png_charp name, int compression_type, png_charp profile, png_uint_32 proflen)); /* Note to maintainer: profile should be png_bytep */ #endif -#if defined(PNG_sPLT_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_sPLT) PNGARG((png_structp png_ptr, +#ifdef PNG_sPLT_SUPPORTED +PNG_EXPORT(png_uint_32,png_get_sPLT) PNGARG((png_structp png_ptr, png_infop info_ptr, png_sPLT_tpp entries)); #endif -#if defined(PNG_sPLT_SUPPORTED) -extern PNG_EXPORT(void,png_set_sPLT) PNGARG((png_structp png_ptr, +#ifdef PNG_sPLT_SUPPORTED +PNG_EXPORT(void,png_set_sPLT) PNGARG((png_structp png_ptr, png_infop info_ptr, png_sPLT_tp entries, int nentries)); #endif -#if defined(PNG_TEXT_SUPPORTED) +#ifdef PNG_TEXT_SUPPORTED /* png_get_text also returns the number of text chunks in *num_text */ -extern PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_structp png_ptr, png_infop info_ptr, png_textp *text_ptr, int *num_text)); #endif -/* - * Note while png_set_text() will accept a structure whose text, - * language, and translated keywords are NULL pointers, the structure - * returned by png_get_text will always contain regular - * zero-terminated C strings. They might be empty strings but - * they will never be NULL pointers. +/* Note while png_set_text() will accept a structure whose text, + * language, and translated keywords are NULL pointers, the structure + * returned by png_get_text will always contain regular + * zero-terminated C strings. They might be empty strings but + * they will never be NULL pointers. */ -#if defined(PNG_TEXT_SUPPORTED) -extern PNG_EXPORT(void,png_set_text) PNGARG((png_structp png_ptr, +#ifdef PNG_TEXT_SUPPORTED +PNG_EXPORT(void,png_set_text) PNGARG((png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, int num_text)); #endif -#if defined(PNG_tIME_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_tIME) PNGARG((png_structp png_ptr, +#ifdef PNG_tIME_SUPPORTED +PNG_EXPORT(png_uint_32,png_get_tIME) PNGARG((png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)); #endif -#if defined(PNG_tIME_SUPPORTED) -extern PNG_EXPORT(void,png_set_tIME) PNGARG((png_structp png_ptr, +#ifdef PNG_tIME_SUPPORTED +PNG_EXPORT(void,png_set_tIME) PNGARG((png_structp png_ptr, png_infop info_ptr, png_timep mod_time)); #endif -#if defined(PNG_tRNS_SUPPORTED) -extern PNG_EXPORT(png_uint_32,png_get_tRNS) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_bytep *trans, int *num_trans, - png_color_16p *trans_values)); +#ifdef PNG_tRNS_SUPPORTED +PNG_EXPORT(png_uint_32,png_get_tRNS) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_bytep *trans_alpha, int *num_trans, + png_color_16p *trans_color)); #endif -#if defined(PNG_tRNS_SUPPORTED) -extern PNG_EXPORT(void,png_set_tRNS) PNGARG((png_structp png_ptr, - png_infop info_ptr, png_bytep trans, int num_trans, - png_color_16p trans_values)); +#ifdef PNG_tRNS_SUPPORTED +PNG_EXPORT(void,png_set_tRNS) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_bytep trans_alpha, int num_trans, + png_color_16p trans_color)); #endif -#if defined(PNG_tRNS_SUPPORTED) +#ifdef PNG_tRNS_SUPPORTED #endif -#if defined(PNG_sCAL_SUPPORTED) +#ifdef PNG_sCAL_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(png_uint_32,png_get_sCAL) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_uint_32,png_get_sCAL) PNGARG((png_structp png_ptr, png_infop info_ptr, int *unit, double *width, double *height)); #else #ifdef PNG_FIXED_POINT_SUPPORTED -extern PNG_EXPORT(png_uint_32,png_get_sCAL_s) PNGARG((png_structp png_ptr, +PNG_EXPORT(png_uint_32,png_get_sCAL_s) PNGARG((png_structp png_ptr, png_infop info_ptr, int *unit, png_charpp swidth, png_charpp sheight)); #endif #endif #endif /* PNG_sCAL_SUPPORTED */ -#if defined(PNG_sCAL_SUPPORTED) +#ifdef PNG_sCAL_SUPPORTED #ifdef PNG_FLOATING_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_sCAL) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_sCAL) PNGARG((png_structp png_ptr, png_infop info_ptr, int unit, double width, double height)); -#endif +#else #ifdef PNG_FIXED_POINT_SUPPORTED -extern PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr, +PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr, png_infop info_ptr, int unit, png_charp swidth, png_charp sheight)); #endif +#endif #endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */ -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) -/* provide a list of chunks and how they are to be handled, if the built-in +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +/* Provide a list of chunks and how they are to be handled, if the built-in handling or default unknown chunk handling is not desired. Any chunks not listed will be handled in the default manner. The IHDR and IEND chunks must not be listed. - keep = 0: follow default behavour + keep = 0: follow default behaviour = 1: do not keep = 2: keep only if safe-to-copy = 3: keep even if unsafe-to-copy */ -extern PNG_EXPORT(void, png_set_keep_unknown_chunks) PNGARG((png_structp +PNG_EXPORT(void, png_set_keep_unknown_chunks) PNGARG((png_structp png_ptr, int keep, png_bytep chunk_list, int num_chunks)); -extern PNG_EXPORT(void, png_set_unknown_chunks) PNGARG((png_structp png_ptr, +PNG_EXPORT(int,png_handle_as_unknown) PNGARG((png_structp png_ptr, png_bytep + chunk_name)); +#endif +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED +PNG_EXPORT(void, png_set_unknown_chunks) PNGARG((png_structp png_ptr, png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)); -extern PNG_EXPORT(void, png_set_unknown_chunk_location) +PNG_EXPORT(void, png_set_unknown_chunk_location) PNGARG((png_structp png_ptr, png_infop info_ptr, int chunk, int location)); -extern PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp +PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp png_ptr, png_infop info_ptr, png_unknown_chunkpp entries)); #endif -#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED -PNG_EXPORT(int,png_handle_as_unknown) PNGARG((png_structp png_ptr, png_bytep - chunk_name)); -#endif /* Png_free_data() will turn off the "valid" flag for anything it frees. - If you need to turn it off for a chunk that your application has freed, - you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); */ -extern PNG_EXPORT(void, png_set_invalid) PNGARG((png_structp png_ptr, + * If you need to turn it off for a chunk that your application has freed, + * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); + */ +PNG_EXPORT(void, png_set_invalid) PNGARG((png_structp png_ptr, png_infop info_ptr, int mask)); -#if defined(PNG_INFO_IMAGE_SUPPORTED) +#ifdef PNG_INFO_IMAGE_SUPPORTED /* The "params" pointer is currently not used and is for future expansion. */ -extern PNG_EXPORT(void, png_read_png) PNGARG((png_structp png_ptr, +PNG_EXPORT(void, png_read_png) PNGARG((png_structp png_ptr, png_infop info_ptr, int transforms, png_voidp params)); -extern PNG_EXPORT(void, png_write_png) PNGARG((png_structp png_ptr, +PNG_EXPORT(void, png_write_png) PNGARG((png_structp png_ptr, png_infop info_ptr, int transforms, png_voidp params)); #endif -/* 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 -#if (PNG_DEBUG > 1) -#define png_debug(l,m) _RPT0(_CRT_WARN,m) -#define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m,p1) -#define png_debug2(l,m,p1,p2) _RPT2(_CRT_WARN,m,p1,p2) -#endif -#else /* PNG_DEBUG_FILE || !_MSC_VER */ -#ifndef PNG_DEBUG_FILE -#define PNG_DEBUG_FILE stderr -#endif /* PNG_DEBUG_FILE */ -#if (PNG_DEBUG > 1) -#define png_debug(l,m) \ -{ \ - int num_tabs=l; \ - fprintf(PNG_DEBUG_FILE,"%s"m,(num_tabs==1 ? "\t" : \ - (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \ -} -#define png_debug1(l,m,p1) \ -{ \ - int num_tabs=l; \ - fprintf(PNG_DEBUG_FILE,"%s"m,(num_tabs==1 ? "\t" : \ - (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \ -} -#define png_debug2(l,m,p1,p2) \ -{ \ - int num_tabs=l; \ - fprintf(PNG_DEBUG_FILE,"%s"m,(num_tabs==1 ? "\t" : \ - (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \ -} -#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 - -extern PNG_EXPORT(png_bytep,png_sig_bytes) PNGARG((void)); - -extern PNG_EXPORT(png_charp,png_get_copyright) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(png_charp,png_get_header_ver) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp png_ptr)); -extern PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr)); +PNG_EXPORT(png_charp,png_get_copyright) PNGARG((png_structp png_ptr)); +PNG_EXPORT(png_charp,png_get_header_ver) PNGARG((png_structp png_ptr)); +PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp + png_ptr)); +PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr)); #ifdef PNG_MNG_FEATURES_SUPPORTED -extern PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp +PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp png_ptr, png_uint_32 mng_features_permitted)); #endif -/* Added to version 1.2.0 */ -#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) -#define PNG_ASM_FLAG_MMX_SUPPORT_COMPILED 0x01 /* not user-settable */ -#define PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU 0x02 /* not user-settable */ -#define PNG_ASM_FLAG_MMX_READ_COMBINE_ROW 0x04 -#define PNG_ASM_FLAG_MMX_READ_INTERLACE 0x08 -#define PNG_ASM_FLAG_MMX_READ_FILTER_SUB 0x10 -#define PNG_ASM_FLAG_MMX_READ_FILTER_UP 0x20 -#define PNG_ASM_FLAG_MMX_READ_FILTER_AVG 0x40 -#define PNG_ASM_FLAG_MMX_READ_FILTER_PAETH 0x80 -#define PNG_ASM_FLAGS_INITIALIZED 0x80000000 /* not user-settable */ - -#define PNG_MMX_READ_FLAGS ( PNG_ASM_FLAG_MMX_READ_COMBINE_ROW \ - | PNG_ASM_FLAG_MMX_READ_INTERLACE \ - | PNG_ASM_FLAG_MMX_READ_FILTER_SUB \ - | PNG_ASM_FLAG_MMX_READ_FILTER_UP \ - | PNG_ASM_FLAG_MMX_READ_FILTER_AVG \ - | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ) -#define PNG_MMX_WRITE_FLAGS ( 0 ) - -#define PNG_MMX_FLAGS ( PNG_ASM_FLAG_MMX_SUPPORT_COMPILED \ - | PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU \ - | PNG_MMX_READ_FLAGS \ - | PNG_MMX_WRITE_FLAGS ) - -#define PNG_SELECT_READ 1 -#define PNG_SELECT_WRITE 2 - - -#if !defined(PNG_1_0_X) -/* pngget.c */ -extern PNG_EXPORT(png_uint_32,png_get_mmx_flagmask) - PNGARG((int flag_select, int *compilerID)); - -/* pngget.c */ -extern PNG_EXPORT(png_uint_32,png_get_asm_flagmask) - PNGARG((int flag_select)); - -/* pngget.c */ -extern PNG_EXPORT(png_uint_32,png_get_asm_flags) - PNGARG((png_structp png_ptr)); +/* For use in png_set_keep_unknown, added to version 1.2.6 */ +#define PNG_HANDLE_CHUNK_AS_DEFAULT 0 +#define PNG_HANDLE_CHUNK_NEVER 1 +#define PNG_HANDLE_CHUNK_IF_SAFE 2 +#define PNG_HANDLE_CHUNK_ALWAYS 3 -/* pngget.c */ -extern PNG_EXPORT(png_byte,png_get_mmx_bitdepth_threshold) - PNGARG((png_structp png_ptr)); +/* Strip the prepended error numbers ("#nnn ") from error and warning + * messages before passing them to the error or warning handler. + */ +#ifdef PNG_ERROR_NUMBERS_SUPPORTED +PNG_EXPORT(void,png_set_strip_error_numbers) PNGARG((png_structp + png_ptr, png_uint_32 strip_mode)); +#endif -/* pngget.c */ -extern PNG_EXPORT(png_uint_32,png_get_mmx_rowbytes_threshold) +/* Added in libpng-1.2.6 */ +#ifdef PNG_SET_USER_LIMITS_SUPPORTED +PNG_EXPORT(void,png_set_user_limits) PNGARG((png_structp + png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max)); +PNG_EXPORT(png_uint_32,png_get_user_width_max) PNGARG((png_structp + png_ptr)); +PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp + png_ptr)); +/* Added in libpng-1.4.0 */ +PNG_EXPORT(void,png_set_chunk_cache_max) PNGARG((png_structp + png_ptr, png_uint_32 user_chunk_cache_max)); +PNG_EXPORT(png_uint_32,png_get_chunk_cache_max) PNGARG((png_structp png_ptr)); +/* Added in libpng-1.4.1 */ +PNG_EXPORT(void,png_set_chunk_malloc_max) PNGARG((png_structp + png_ptr, png_alloc_size_t user_chunk_cache_max)); +PNG_EXPORT(png_alloc_size_t,png_get_chunk_malloc_max) + PNGARG((png_structp png_ptr)); +#endif -/* pngset.c */ -extern PNG_EXPORT(void,png_set_asm_flags) - PNGARG((png_structp png_ptr, png_uint_32 asm_flags)); +#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED) +PNG_EXPORT(png_uint_32,png_get_pixels_per_inch) PNGARG((png_structp png_ptr, +png_infop info_ptr)); -/* pngset.c */ -extern PNG_EXPORT(void,png_set_mmx_thresholds) - PNGARG((png_structp png_ptr, png_byte mmx_bitdepth_threshold, - png_uint_32 mmx_rowbytes_threshold)); +PNG_EXPORT(png_uint_32,png_get_x_pixels_per_inch) PNGARG((png_structp png_ptr, +png_infop info_ptr)); -#endif /* PNG_1_0_X */ -#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */ +PNG_EXPORT(png_uint_32,png_get_y_pixels_per_inch) PNGARG((png_structp png_ptr, +png_infop info_ptr)); -#if !defined(PNG_1_0_X) -/* png.c, pnggccrd.c, or pngvcrd.c */ -extern PNG_EXPORT(int,png_mmx_support) PNGARG((void)); +PNG_EXPORT(float,png_get_x_offset_inches) PNGARG((png_structp png_ptr, +png_infop info_ptr)); -/* Strip the prepended error numbers ("#nnn ") from error and warning - * messages before passing them to the error or warning handler. */ -#ifdef PNG_ERROR_NUMBERS_SUPPORTED -extern PNG_EXPORT(void,png_set_strip_error_numbers) PNGARG((png_structp - png_ptr, png_uint_32 strip_mode)); -#endif -#endif /* PNG_1_0_X */ +PNG_EXPORT(float,png_get_y_offset_inches) PNGARG((png_structp png_ptr, +png_infop info_ptr)); -/* Maintainer: Put new public prototypes here ^, in libpng.3, and project defs */ +#ifdef PNG_pHYs_SUPPORTED +PNG_EXPORT(png_uint_32,png_get_pHYs_dpi) PNGARG((png_structp png_ptr, +png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); +#endif /* PNG_pHYs_SUPPORTED */ +#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */ -#define PNG_HEADER_VERSION_STRING \ - " libpng version 1.2.4 - July 8, 2002 (header)\n" +/* Added in libpng-1.4.0 */ +#ifdef PNG_IO_STATE_SUPPORTED +PNG_EXPORT(png_uint_32,png_get_io_state) PNGARG((png_structp png_ptr)); + +PNG_EXPORT(png_bytep,png_get_io_chunk_name) + PNGARG((png_structp png_ptr)); + +/* The flags returned by png_get_io_state() are the following: */ +#define PNG_IO_NONE 0x0000 /* no I/O at this moment */ +#define PNG_IO_READING 0x0001 /* currently reading */ +#define PNG_IO_WRITING 0x0002 /* currently writing */ +#define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */ +#define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */ +#define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */ +#define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */ +#define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */ +#define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */ +#endif /* ?PNG_IO_STATE_SUPPORTED */ + +/* Maintainer: Put new public prototypes here ^, in libpng.3, and project + * defs + */ #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED /* With these routines we avoid an integer divide, which will be slower on @@ -2438,19 +2608,21 @@ extern PNG_EXPORT(void,png_set_strip_error_numbers) PNGARG((png_structp /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ -# define png_composite(composite, fg, alpha, bg) \ - { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) * (png_uint_16)(alpha) \ - + (png_uint_16)(bg)*(png_uint_16)(255 - \ - (png_uint_16)(alpha)) + (png_uint_16)128); \ +# define png_composite(composite, fg, alpha, bg) \ + { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \ + * (png_uint_16)(alpha) \ + + (png_uint_16)(bg)*(png_uint_16)(255 \ + - (png_uint_16)(alpha)) + (png_uint_16)128); \ (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } -# define png_composite_16(composite, fg, alpha, bg) \ - { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) * (png_uint_32)(alpha) \ - + (png_uint_32)(bg)*(png_uint_32)(65535L - \ - (png_uint_32)(alpha)) + (png_uint_32)32768L); \ +# define png_composite_16(composite, fg, alpha, bg) \ + { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \ + * (png_uint_32)(alpha) \ + + (png_uint_32)(bg)*(png_uint_32)(65535L \ + - (png_uint_32)(alpha)) + (png_uint_32)32768L); \ (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } -#else /* standard method using integer division */ +#else /* Standard method using integer division */ # define png_composite(composite, fg, alpha, bg) \ (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ @@ -2461,818 +2633,67 @@ extern PNG_EXPORT(void,png_set_strip_error_numbers) PNGARG((png_structp (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \ (png_uint_32)32767) / (png_uint_32)65535L) - #endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ -/* These next 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. +#ifdef PNG_USE_READ_MACROS +/* Inline macros to do direct reads of bytes from the input buffer. + * The png_get_int_32() routine assumes we are using two's complement + * format for negative values, which is almost certainly true. */ - -#if defined(PNG_INTERNAL) - -/* 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 -#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 - -/* 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 */ - -/* 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 -#define PNG_FLAG_FREE_PLTE 0x1000 -#define PNG_FLAG_FREE_TRNS 0x2000 -#define PNG_FLAG_FREE_HIST 0x4000 -#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 - -/* For use in png_set_keep_unknown, png_handle_as_unknown */ -#define HANDLE_CHUNK_AS_DEFAULT 0 -#define HANDLE_CHUNK_NEVER 1 -#define HANDLE_CHUNK_IF_SAFE 2 -#define HANDLE_CHUNK_ALWAYS 3 - -#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))) - -/* variables declared in png.c - only it needs to define PNG_NO_EXTERN */ -#if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN) -/* place to hold the signature string for a PNG file. */ -#ifdef PNG_USE_GLOBAL_ARRAYS - PNG_EXPORT_VAR (const png_byte FARDATA) png_sig[8]; +# define png_get_uint_32(buf) \ + (((png_uint_32)(*(buf)) << 24) + \ + ((png_uint_32)(*((buf) + 1)) << 16) + \ + ((png_uint_32)(*((buf) + 2)) << 8) + \ + ((png_uint_32)(*((buf) + 3)))) +# define png_get_uint_16(buf) \ + (((png_uint_32)(*(buf)) << 8) + \ + ((png_uint_32)(*((buf) + 1)))) +# define png_get_int_32(buf) \ + ((png_int_32)((*(buf) & 0x80) \ + ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffff)+1)) \ + : (png_int_32)png_get_uint_32(buf))) #else -#define png_sig png_sig_bytes(NULL) -#endif -#endif /* PNG_NO_EXTERN */ - -/* Constant strings for known chunk types. If you need to add a chunk, - * define the name here, and add an invocation of the macro in png.c and - * wherever it's needed. - */ -#define PNG_IHDR const png_byte png_IHDR[5] = { 73, 72, 68, 82, '\0'} -#define PNG_IDAT const png_byte png_IDAT[5] = { 73, 68, 65, 84, '\0'} -#define PNG_IEND const png_byte png_IEND[5] = { 73, 69, 78, 68, '\0'} -#define PNG_PLTE const png_byte png_PLTE[5] = { 80, 76, 84, 69, '\0'} -#define PNG_bKGD const png_byte png_bKGD[5] = { 98, 75, 71, 68, '\0'} -#define PNG_cHRM const png_byte png_cHRM[5] = { 99, 72, 82, 77, '\0'} -#define PNG_gAMA const png_byte png_gAMA[5] = {103, 65, 77, 65, '\0'} -#define PNG_hIST const png_byte png_hIST[5] = {104, 73, 83, 84, '\0'} -#define PNG_iCCP const png_byte png_iCCP[5] = {105, 67, 67, 80, '\0'} -#define PNG_iTXt const png_byte png_iTXt[5] = {105, 84, 88, 116, '\0'} -#define PNG_oFFs const png_byte png_oFFs[5] = {111, 70, 70, 115, '\0'} -#define PNG_pCAL const png_byte png_pCAL[5] = {112, 67, 65, 76, '\0'} -#define PNG_sCAL const png_byte png_sCAL[5] = {115, 67, 65, 76, '\0'} -#define PNG_pHYs const png_byte png_pHYs[5] = {112, 72, 89, 115, '\0'} -#define PNG_sBIT const png_byte png_sBIT[5] = {115, 66, 73, 84, '\0'} -#define PNG_sPLT const png_byte png_sPLT[5] = {115, 80, 76, 84, '\0'} -#define PNG_sRGB const png_byte png_sRGB[5] = {115, 82, 71, 66, '\0'} -#define PNG_tEXt const png_byte png_tEXt[5] = {116, 69, 88, 116, '\0'} -#define PNG_tIME const png_byte png_tIME[5] = {116, 73, 77, 69, '\0'} -#define PNG_tRNS const png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'} -#define PNG_zTXt const png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'} - -#ifdef PNG_USE_GLOBAL_ARRAYS -PNG_EXPORT_VAR (const png_byte FARDATA) png_IHDR[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_IDAT[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_IEND[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_PLTE[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_bKGD[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_cHRM[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_gAMA[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_hIST[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_iCCP[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_iTXt[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_oFFs[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_pCAL[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_sCAL[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_pHYs[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_sBIT[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_sPLT[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_sRGB[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_tEXt[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_tIME[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_tRNS[5]; -PNG_EXPORT_VAR (const png_byte FARDATA) png_zTXt[5]; -#endif /* PNG_USE_GLOBAL_ARRAYS */ - - -/* Inline macros to do direct reads of bytes from the input buffer. These - * require that you are using an architecture that uses PNG byte ordering - * (MSB first) and supports unaligned data storage. I think that PowerPC - * in big-endian mode and 680x0 are the only ones that will support this. - * The x86 line of processors definitely do not. The png_get_int_32() - * routine also assumes we are using two's complement format for negative - * values, which is almost certainly true. - */ -#if defined(PNG_READ_BIG_ENDIAN_SUPPORTED) -# if defined(PNG_pCAL_SUPPORTED) || defined(PNG_oFFs_SUPPORTED) -# define png_get_int_32(buf) ( *((png_int_32p) (buf))) -# endif -# define png_get_uint_32(buf) ( *((png_uint_32p) (buf))) -# define png_get_uint_16(buf) ( *((png_uint_16p) (buf))) -#else -# if defined(PNG_pCAL_SUPPORTED) || defined(PNG_oFFs_SUPPORTED) -PNG_EXTERN png_int_32 png_get_int_32 PNGARG((png_bytep buf)); -# endif -PNG_EXTERN png_uint_32 png_get_uint_32 PNGARG((png_bytep buf)); -PNG_EXTERN png_uint_16 png_get_uint_16 PNGARG((png_bytep buf)); -#endif /* !PNG_READ_BIG_ENDIAN_SUPPORTED */ - -/* Initialize png_ptr struct for reading, and allocate any other memory. - * (old interface - DEPRECATED - use png_create_read_struct instead). - */ -extern PNG_EXPORT(void,png_read_init) PNGARG((png_structp png_ptr)); -#undef png_read_init -#define png_read_init(png_ptr) png_read_init_3(&png_ptr, \ - PNG_LIBPNG_VER_STRING, sizeof(png_struct)); -extern PNG_EXPORT(void,png_read_init_3) PNGARG((png_structpp ptr_ptr, - png_const_charp user_png_ver, png_size_t png_struct_size)); -extern PNG_EXPORT(void,png_read_init_2) PNGARG((png_structp png_ptr, - png_const_charp user_png_ver, png_size_t png_struct_size, png_size_t - png_info_size)); - -/* Initialize png_ptr struct for writing, and allocate any other memory. - * (old interface - DEPRECATED - use png_create_write_struct instead). - */ -extern PNG_EXPORT(void,png_write_init) PNGARG((png_structp png_ptr)); -#undef png_write_init -#define png_write_init(png_ptr) png_write_init_3(&png_ptr, \ - PNG_LIBPNG_VER_STRING, sizeof(png_struct)); -extern PNG_EXPORT(void,png_write_init_3) PNGARG((png_structpp ptr_ptr, - png_const_charp user_png_ver, png_size_t png_struct_size)); -extern PNG_EXPORT(void,png_write_init_2) PNGARG((png_structp png_ptr, - png_const_charp user_png_ver, png_size_t png_struct_size, png_size_t - png_info_size)); - -/* 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)); - -#ifndef PNG_1_0_X -/* Function to allocate memory for zlib. */ -PNG_EXTERN voidpf png_zalloc PNGARG((voidpf png_ptr, uInt items, uInt size)); - -/* Function to free memory for zlib */ -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)); +PNG_EXPORT(png_uint_32,png_get_uint_32) PNGARG((png_bytep buf)); +PNG_EXPORT(png_uint_16,png_get_uint_16) PNGARG((png_bytep buf)); +#ifdef PNG_GET_INT_32_SUPPORTED +PNG_EXPORT(png_int_32,png_get_int_32) PNGARG((png_bytep buf)); #endif - -PNG_EXTERN void PNGAPI png_default_write_data PNGARG((png_structp png_ptr, - png_bytep data, png_size_t length)); - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) -#if !defined(PNG_NO_STDIO) -PNG_EXTERN void PNGAPI png_default_flush PNGARG((png_structp png_ptr)); #endif -#endif -#else /* PNG_1_0_X */ -#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -PNG_EXTERN void png_push_fill_buffer PNGARG((png_structp png_ptr, - png_bytep buffer, png_size_t length)); -#endif -#endif /* PNG_1_0_X */ - -/* 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 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)); +PNG_EXPORT(png_uint_32,png_get_uint_31) + PNGARG((png_structp png_ptr, png_bytep buf)); +/* No png_get_int_16 -- may be added if there's a real need for it. */ -/* 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 png_charp png_decompress_chunk PNGARG((png_structp png_ptr, - int comp_type, png_charp chunkdata, 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)); - -#if defined(PNG_WRITE_FLUSH_SUPPORTED) -PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); -#endif - - -/* Place a 32-bit number into a buffer in PNG byte order (big-endian). - * The only currently known PNG chunks that use signed numbers are - * the ancillary extension chunks, oFFs and pCAL. - */ -PNG_EXTERN void png_save_uint_32 PNGARG((png_bytep buf, png_uint_32 i)); - -#if defined(PNG_WRITE_pCAL_SUPPORTED) || defined(PNG_WRITE_oFFs_SUPPORTED) -PNG_EXTERN void png_save_int_32 PNGARG((png_bytep buf, png_int_32 i)); -#endif +/* Place a 32-bit number into a buffer in PNG byte order (big-endian). */ +PNG_EXPORT(void,png_save_uint_32) + PNGARG((png_bytep buf, png_uint_32 i)); +PNG_EXPORT(void,png_save_int_32) + PNGARG((png_bytep buf, png_int_32 i)); /* Place a 16-bit number into a buffer in PNG byte order. * The parameter is declared unsigned int, not png_uint_16, * just to avoid potential problems on pre-ANSI C compilers. */ -PNG_EXTERN void png_save_uint_16 PNGARG((png_bytep buf, unsigned int i)); - -/* simple function to write the signature */ -PNG_EXTERN void png_write_sig PNGARG((png_structp png_ptr)); - -/* 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)); - -#if defined(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 - -#if defined(PNG_WRITE_sBIT_SUPPORTED) -PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, png_color_8p sbit, - int color_type)); -#endif - -#if defined(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 -#ifdef PNG_FIXED_POINT_SUPPORTED -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 -#endif - -#if defined(PNG_WRITE_sRGB_SUPPORTED) -PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr, - int intent)); -#endif - -#if defined(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 - -#if defined(PNG_WRITE_sPLT_SUPPORTED) -PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr, - png_sPLT_tp palette)); -#endif - -#if defined(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 - -#if defined(PNG_WRITE_bKGD_SUPPORTED) -PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr, - png_color_16p values, int color_type)); -#endif - -#if defined(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 - -#if defined(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 - -#if defined(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 - -#if defined(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 - -#if defined(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 - -#if defined(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 - -#if defined(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 - -#if defined(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 - -#if defined(PNG_WRITE_tIME_SUPPORTED) -PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr, - png_timep mod_time)); -#endif - -#if defined(PNG_WRITE_sCAL_SUPPORTED) -#if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO) -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)); - -#if defined(PNG_READ_GAMMA_SUPPORTED) -PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr)); -#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)); - -#if defined(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 */ - -#if defined(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 */ -#if defined(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 - -#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) -PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(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 +PNG_EXPORT(void,png_save_uint_16) + PNGARG((png_bytep buf, unsigned int i)); +/* No png_save_int_16 -- may be added if there's a real need for it. */ -#if defined(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 - -#if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) -PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info, - png_bytep row)); -#endif - -#if defined(PNG_READ_PACK_SUPPORTED) -PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, png_bytep row)); -#endif - -#if defined(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 - -#if defined(PNG_READ_16_TO_8_SUPPORTED) -PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, png_bytep row)); -#endif +/* ************************************************************************* */ -#if defined(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)); - -# if defined(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 - -#if defined(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 - -#if defined(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 - -#if defined(PNG_READ_BACKGROUND_SUPPORTED) -#if defined(PNG_READ_GAMMA_SUPPORTED) -PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row, - png_color_16p trans_values, 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_values, png_color_16p background)); -#endif -#endif - -#if defined(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 - -#if defined(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. +/* Various modes of operation. Note that after an init, mode is set to + * zero automatically when the structure is created. */ - -/* 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)); - -#if defined(PNG_READ_bKGD_SUPPORTED) -PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_cHRM_SUPPORTED) -PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_gAMA_SUPPORTED) -PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_hIST_SUPPORTED) -PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(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 */ - -#if defined(PNG_READ_iTXt_SUPPORTED) -PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_oFFs_SUPPORTED) -PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_pCAL_SUPPORTED) -PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_pHYs_SUPPORTED) -PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_sBIT_SUPPORTED) -PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_sCAL_SUPPORTED) -PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(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 */ - -#if defined(PNG_READ_sRGB_SUPPORTED) -PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_tEXt_SUPPORTED) -PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_tIME_SUPPORTED) -PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(PNG_READ_tRNS_SUPPORTED) -PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr, - png_uint_32 length)); -#endif - -#if defined(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)); -#if defined(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 -#if defined(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 -#if defined(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 - -#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) -/* png.c */ /* PRIVATE */ -PNG_EXTERN void png_init_mmx_flags PNGARG((png_structp png_ptr)); -#endif -/* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ - -#endif /* PNG_INTERNAL */ +#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 #ifdef __cplusplus } #endif #endif /* PNG_VERSION_INFO_ONLY */ -/* do not put anything past this line */ +/* Do not put anything past this line */ #endif /* PNG_H */