diff options
| author | Eirik Aavitsland <eirik.aavitsland@theqtcompany.com> | 2015-04-08 12:30:36 +0200 |
|---|---|---|
| committer | aavit <eirik.aavitsland@theqtcompany.com> | 2015-04-09 12:14:28 +0000 |
| commit | 68c137cc725ceadec68c455e0e3e365ecb00f2c1 (patch) | |
| tree | 242485964753e2e7890015694a916c71755cdfb3 /src/3rdparty/libpng/png.h | |
| parent | f0cee4568ec3bd58cbc33108a6e606c3294e0fb3 (diff) | |
Update bundled libpng to version 1.6.17
Merged in the upstream version, which obsoleted many of the local
patches. The remaining diff to clean 1.6.17 is archived in the
qtpatches.diff file.
Change-Id: I5065435dc5a922d3f4a46eb37a23a4877dde2ee6
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@theqtcompany.com>
Diffstat (limited to 'src/3rdparty/libpng/png.h')
| -rw-r--r-- | src/3rdparty/libpng/png.h | 1902 |
1 files changed, 1264 insertions, 638 deletions
diff --git a/src/3rdparty/libpng/png.h b/src/3rdparty/libpng/png.h index 4e0dee1793..372599bfb4 100644 --- a/src/3rdparty/libpng/png.h +++ b/src/3rdparty/libpng/png.h @@ -1,8 +1,9 @@ /* png.h - header file for PNG reference library * - * libpng version 1.5.10 - March 29, 2012 - * Copyright (c) 1998-2012 Glenn Randers-Pehrson + * libpng version 1.6.17, March 26, 2015 + * + * Copyright (c) 1998-2015 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.) * @@ -11,7 +12,7 @@ * 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 1.5.10 - March 29, 2012: Glenn + * libpng versions 0.97, January 1998, through 1.6.17, March 26, 2015: Glenn * See also "Contributing Authors", below. * * Note about libpng version numbers: @@ -166,14 +167,55 @@ * 1.5.7beta01-05 15 10507 15.so.15.7[.0] * 1.5.7rc01-03 15 10507 15.so.15.7[.0] * 1.5.7 15 10507 15.so.15.7[.0] - * 1.5.8beta01 15 10508 15.so.15.8[.0] - * 1.5.8rc01 15 10508 15.so.15.8[.0] - * 1.5.8 15 10508 15.so.15.8[.0] - * 1.5.9beta01-02 15 10509 15.so.15.9[.0] - * 1.5.9rc01 15 10509 15.so.15.9[.0] - * 1.5.9 15 10509 15.so.15.9[.0] - * 1.5.10beta01-05 15 10510 15.so.15.10[.0] - * 1.5.10 15 10510 15.so.15.10[.0] + * 1.6.0beta01-40 16 10600 16.so.16.0[.0] + * 1.6.0rc01-08 16 10600 16.so.16.0[.0] + * 1.6.0 16 10600 16.so.16.0[.0] + * 1.6.1beta01-09 16 10601 16.so.16.1[.0] + * 1.6.1rc01 16 10601 16.so.16.1[.0] + * 1.6.1 16 10601 16.so.16.1[.0] + * 1.6.2beta01 16 10602 16.so.16.2[.0] + * 1.6.2rc01-06 16 10602 16.so.16.2[.0] + * 1.6.2 16 10602 16.so.16.2[.0] + * 1.6.3beta01-11 16 10603 16.so.16.3[.0] + * 1.6.3rc01 16 10603 16.so.16.3[.0] + * 1.6.3 16 10603 16.so.16.3[.0] + * 1.6.4beta01-02 16 10604 16.so.16.4[.0] + * 1.6.4rc01 16 10604 16.so.16.4[.0] + * 1.6.4 16 10604 16.so.16.4[.0] + * 1.6.5 16 10605 16.so.16.5[.0] + * 1.6.6 16 10606 16.so.16.6[.0] + * 1.6.7beta01-04 16 10607 16.so.16.7[.0] + * 1.6.7rc01-03 16 10607 16.so.16.7[.0] + * 1.6.7 16 10607 16.so.16.7[.0] + * 1.6.8beta01-02 16 10608 16.so.16.8[.0] + * 1.6.8rc01-02 16 10608 16.so.16.8[.0] + * 1.6.8 16 10608 16.so.16.8[.0] + * 1.6.9beta01-04 16 10609 16.so.16.9[.0] + * 1.6.9rc01-02 16 10609 16.so.16.9[.0] + * 1.6.9 16 10609 16.so.16.9[.0] + * 1.6.10beta01-03 16 10610 16.so.16.10[.0] + * 1.6.10rc01-03 16 10610 16.so.16.10[.0] + * 1.6.10 16 10610 16.so.16.10[.0] + * 1.6.11beta01-06 16 10611 16.so.16.11[.0] + * 1.6.11rc01-02 16 10611 16.so.16.11[.0] + * 1.6.11 16 10611 16.so.16.11[.0] + * 1.6.12rc01-03 16 10612 16.so.16.12[.0] + * 1.6.12 16 10612 16.so.16.12[.0] + * 1.6.13beta01-04 16 10613 16.so.16.13[.0] + * 1.6.13rc01-02 16 10613 16.so.16.13[.0] + * 1.6.13 16 10613 16.so.16.13[.0] + * 1.6.14beta01-07 16 10614 16.so.16.14[.0] + * 1.6.14rc01-02 16 10614 16.so.16.14[.0] + * 1.6.14 16 10614 16.so.16.14[.0] + * 1.6.15beta01-08 16 10615 16.so.16.15[.0] + * 1.6.15rc01-03 16 10615 16.so.16.15[.0] + * 1.6.15 16 10615 16.so.16.15[.0] + * 1.6.16beta01-03 16 10616 16.so.16.16[.0] + * 1.6.16rc01-02 16 10616 16.so.16.16[.0] + * 1.6.16 16 10616 16.so.16.16[.0] + * 1.6.17beta01-06 16 10617 16.so.16.17[.0] + * 1.6.17rc01-06 16 10617 16.so.16.17[.0] + * 1.6.17 16 10617 16.so.16.17[.0] * * Henceforth the source version will match the shared-library major * and minor numbers; the shared-library major version number will be @@ -205,8 +247,8 @@ * * This code is released under the libpng license. * - * libpng versions 1.2.6, August 15, 2004, through 1.5.10, March 29, 2012, are - * Copyright (c) 2004, 2006-2012 Glenn Randers-Pehrson, and are + * libpng versions 1.2.6, August 15, 2004, through 1.6.17, March 26, 2015, are + * Copyright (c) 2004, 2006-2015 Glenn Randers-Pehrson, and are * distributed according to the same disclaimer and license as libpng-1.2.5 * with the following individual added to the list of Contributing Authors: * @@ -317,28 +359,30 @@ * Y2K compliance in libpng: * ========================= * - * March 29, 2012 + * March 26, 2015 * * Since the PNG Development group is an ad-hoc body, we can't make * an official declaration. * * This is your unofficial assurance that libpng from version 0.71 and - * upward through 1.5.10 are Y2K compliant. It is my belief that + * upward through 1.6.17 are Y2K compliant. It is my belief that * earlier versions were also Y2K compliant. * * Libpng only has two year fields. One is a 2-byte unsigned integer - * that will hold years up to 65535. The other holds the date in text - * format, and will hold years up to 9999. + * that will hold years up to 65535. The other, which is deprecated, + * holds the date in text format, and will hold years up to 9999. * * The integer is * "png_uint_16 year" in png_time_struct. * * The string is - * "png_char time_buffer" in png_struct + * "char time_buffer[29]" in png_struct. This is no longer used + * in libpng-1.6.x and will be removed from libpng-1.7.0. * * There are seven time-related functions: - * png.c: png_convert_to_rfc_1123() in png.c - * (formerly png_convert_to_rfc_1152() in error) + * png.c: png_convert_to_rfc_1123_buffer() in png.c + * (formerly png_convert_to_rfc_1123() prior to libpng-1.5.x and + * png_convert_to_rfc_1152() in error prior to libpng-0.98) * png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c * png_convert_from_time_t() in pngwrite.c * png_get_tIME() in pngget.c @@ -349,8 +393,8 @@ * All handle dates properly in a Y2K environment. The * png_convert_from_time_t() function calls gmtime() to convert from system * clock time, which returns (year - 1900), which we properly convert to - * the full 4-digit year. There is a possibility that applications using - * libpng are not passing 4-digit years into the png_convert_to_rfc_1123() + * the full 4-digit year. There is a possibility that libpng applications + * are not passing 4-digit years into the png_convert_to_rfc_1123_buffer() * function, or that they are incorrectly passing only a 2-digit year * instead of "year - 1900" into the png_convert_from_struct_tm() function, * but this is not under our control. The libpng documentation has always @@ -374,24 +418,26 @@ /* This is not the place to learn how to use libpng. The file libpng-manual.txt * describes how to use libpng, and the file example.c summarizes it * with some code on which to build. This file is useful for looking - * at the actual function definitions and structure components. + * at the actual function definitions and structure components. If that + * file has been stripped from your copy of libpng, you can find it at + * <http://www.libpng.org/pub/png/libpng-manual.txt> * * If you just need to read a PNG file and don't want to read the documentation * skip to the end of this file and read the section entitled 'simplified API'. */ /* Version information for png.h - this should match the version in png.c */ -#define PNG_LIBPNG_VER_STRING "1.5.10" +#define PNG_LIBPNG_VER_STRING "1.6.17" #define PNG_HEADER_VERSION_STRING \ - " libpng version 1.5.10 - March 29, 2012\n" + " libpng version 1.6.17 - March 26, 2015\n" -#define PNG_LIBPNG_VER_SONUM 15 -#define PNG_LIBPNG_VER_DLLNUM 15 +#define PNG_LIBPNG_VER_SONUM 16 +#define PNG_LIBPNG_VER_DLLNUM 16 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */ #define PNG_LIBPNG_VER_MAJOR 1 -#define PNG_LIBPNG_VER_MINOR 5 -#define PNG_LIBPNG_VER_RELEASE 10 +#define PNG_LIBPNG_VER_MINOR 6 +#define PNG_LIBPNG_VER_RELEASE 17 /* This should match the numeric part of the final component of * PNG_LIBPNG_VER_STRING, omitting any leading zero: @@ -422,7 +468,7 @@ * version 1.0.0 was mis-numbered 100 instead of 10000). From * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release */ -#define PNG_LIBPNG_VER 10510 /* 1.5.10 */ +#define PNG_LIBPNG_VER 10617 /* 1.6.17 */ /* Library configuration: these options cannot be changed after * the library has been built. @@ -435,25 +481,7 @@ #endif #ifndef PNG_VERSION_INFO_ONLY -# ifndef PNG_BUILDING_SYMBOL_TABLE - /* - * Standard header files (not needed for the version info or while - * building symbol table -- see scripts/pnglibconf.dfa) - */ -# ifdef PNG_SETJMP_SUPPORTED -# include <setjmp.h> -# endif - - /* Need the time information for converting tIME chunks, it - * defines struct tm: - */ -# ifdef PNG_CONVERT_tIME_SUPPORTED - /* "time.h" functions are not supported on all operating systems */ -# include <time.h> -# endif -# endif - -/* Machine specific configuration. */ + /* Machine specific configuration. */ # include "pngconf.h" #endif @@ -502,6 +530,7 @@ extern "C" { * 2. Type definitions (base types are defined in pngconf.h), structure * definitions. * 3. Exported library functions. + * 4. Simplified API. * * The library source code has additional files (principally pngpriv.h) that * allow configuration of the library. @@ -544,7 +573,48 @@ extern "C" { /* This triggers a compiler error in png.c, if png.c and png.h * do not agree upon the version number. */ -typedef char* png_libpng_version_1_5_10; +typedef char* png_libpng_version_1_6_17; + +/* Basic control structions. Read libpng-manual.txt or libpng.3 for more info. + * + * png_struct is the cache of information used while reading or writing a single + * PNG file. One of these is always required, although the simplified API + * (below) hides the creation and destruction of it. + */ +typedef struct png_struct_def png_struct; +typedef const png_struct * png_const_structp; +typedef png_struct * png_structp; +typedef png_struct * * png_structpp; + +/* png_info contains information read from or to be written to a PNG file. One + * or more of these must exist while reading or creating a PNG file. The + * information is not used by libpng during read but is used to control what + * gets written when a PNG file is created. "png_get_" function calls read + * information during read and "png_set_" functions calls write information + * when creating a PNG. + * been moved into a separate header file that is not accessible to + * applications. Read libpng-manual.txt or libpng.3 for more info. + */ +typedef struct png_info_def png_info; +typedef png_info * png_infop; +typedef const png_info * png_const_infop; +typedef png_info * * png_infopp; + +/* Types with names ending 'p' are pointer types. The corresponding types with + * names ending 'rp' are identical pointer types except that the pointer is + * marked 'restrict', which means that it is the only pointer to the object + * passed to the function. Applications should not use the 'restrict' types; + * it is always valid to pass 'p' to a pointer with a function argument of the + * corresponding 'rp' type. Different compilers have different rules with + * regard to type matching in the presence of 'restrict'. For backward + * compatibility libpng callbacks never have 'restrict' in their parameters and, + * consequentially, writing portable application code is extremely difficult if + * an attempt is made to use 'restrict'. + */ +typedef png_struct * PNG_RESTRICT png_structrp; +typedef const png_struct * PNG_RESTRICT png_const_structrp; +typedef png_info * PNG_RESTRICT png_inforp; +typedef const png_info * PNG_RESTRICT png_const_inforp; /* Three color definitions. The order of the red, green, and blue, (and the * exact size) is not important, although the size of the fields need to @@ -556,9 +626,9 @@ typedef struct png_color_struct png_byte green; png_byte blue; } png_color; -typedef png_color FAR * png_colorp; -typedef PNG_CONST png_color FAR * png_const_colorp; -typedef png_color FAR * FAR * png_colorpp; +typedef png_color * png_colorp; +typedef const png_color * png_const_colorp; +typedef png_color * * png_colorpp; typedef struct png_color_16_struct { @@ -568,9 +638,9 @@ typedef struct png_color_16_struct png_uint_16 blue; png_uint_16 gray; /* for use in grayscale files */ } png_color_16; -typedef png_color_16 FAR * png_color_16p; -typedef PNG_CONST png_color_16 FAR * png_const_color_16p; -typedef png_color_16 FAR * FAR * png_color_16pp; +typedef png_color_16 * png_color_16p; +typedef const png_color_16 * png_const_color_16p; +typedef png_color_16 * * png_color_16pp; typedef struct png_color_8_struct { @@ -580,9 +650,9 @@ typedef struct png_color_8_struct png_byte gray; /* for use in grayscale files */ png_byte alpha; /* for alpha channel files */ } png_color_8; -typedef png_color_8 FAR * png_color_8p; -typedef PNG_CONST png_color_8 FAR * png_const_color_8p; -typedef png_color_8 FAR * FAR * png_color_8pp; +typedef png_color_8 * png_color_8p; +typedef const png_color_8 * png_const_color_8p; +typedef png_color_8 * * png_color_8pp; /* * The following two structures are used for the in-core representation @@ -596,9 +666,9 @@ typedef struct png_sPLT_entry_struct png_uint_16 alpha; png_uint_16 frequency; } png_sPLT_entry; -typedef png_sPLT_entry FAR * png_sPLT_entryp; -typedef PNG_CONST png_sPLT_entry FAR * png_const_sPLT_entryp; -typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp; +typedef png_sPLT_entry * png_sPLT_entryp; +typedef const png_sPLT_entry * png_const_sPLT_entryp; +typedef png_sPLT_entry * * png_sPLT_entrypp; /* When the depth of the sPLT palette is 8 bits, the color and alpha samples * occupy the LSB of their respective members, and the MSB of each member @@ -612,9 +682,9 @@ typedef struct png_sPLT_struct png_sPLT_entryp entries; /* palette entries */ png_int_32 nentries; /* number of palette entries */ } png_sPLT_t; -typedef png_sPLT_t FAR * png_sPLT_tp; -typedef PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp; -typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; +typedef png_sPLT_t * png_sPLT_tp; +typedef const png_sPLT_t * png_const_sPLT_tp; +typedef png_sPLT_t * * png_sPLT_tpp; #ifdef PNG_TEXT_SUPPORTED /* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file, @@ -651,9 +721,9 @@ typedef struct png_text_struct png_charp lang_key; /* keyword translated UTF-8 string, 0 or more chars or a NULL pointer */ } png_text; -typedef png_text FAR * png_textp; -typedef PNG_CONST png_text FAR * png_const_textp; -typedef png_text FAR * FAR * png_textpp; +typedef png_text * png_textp; +typedef const png_text * png_const_textp; +typedef png_text * * png_textpp; #endif /* Supported compression types for text in PNG files (tEXt, and zTXt). @@ -681,49 +751,45 @@ typedef struct png_time_struct png_byte minute; /* minute of hour, 0 - 59 */ png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ } png_time; -typedef png_time FAR * png_timep; -typedef PNG_CONST png_time FAR * png_const_timep; -typedef png_time FAR * FAR * png_timepp; +typedef png_time * png_timep; +typedef const png_time * png_const_timep; +typedef png_time * * png_timepp; -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ - defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) +#if defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED) ||\ + defined(PNG_USER_CHUNKS_SUPPORTED) /* png_unknown_chunk is a structure to hold queued chunks for which there is * no specific support. The idea is that we can use this to queue * up private chunks for output even though the library doesn't actually * know about their semantics. + * + * The data in the structure is set by libpng on read and used on write. */ typedef struct png_unknown_chunk_t { - png_byte name[5]; - png_byte *data; + png_byte name[5]; /* Textual chunk name with '\0' terminator */ + png_byte *data; /* Data, should not be modified on read! */ png_size_t size; - /* libpng-using applications should NOT directly modify this byte. */ + /* On write 'location' must be set using the flag values listed below. + * Notice that on read it is set by libpng however the values stored have + * more bits set than are listed below. Always treat the value as a + * bitmask. On write set only one bit - setting multiple bits may cause the + * chunk to be written in multiple places. + */ png_byte location; /* mode of operation at read time */ } - - png_unknown_chunk; -typedef png_unknown_chunk FAR * png_unknown_chunkp; -typedef PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp; -typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp; -#endif -/* Values for the unknown chunk location byte */ +typedef png_unknown_chunk * png_unknown_chunkp; +typedef const png_unknown_chunk * png_const_unknown_chunkp; +typedef png_unknown_chunk * * png_unknown_chunkpp; +#endif +/* Flag values for the unknown chunk location byte. */ #define PNG_HAVE_IHDR 0x01 #define PNG_HAVE_PLTE 0x02 #define PNG_AFTER_IDAT 0x08 -/* The complete definition of png_info has, as of libpng-1.5.0, - * been moved into a separate header file that is not accessible to - * applications. Read libpng-manual.txt or libpng.3 for more info. - */ -typedef struct png_info_def png_info; -typedef png_info FAR * png_infop; -typedef PNG_CONST png_info FAR * png_const_infop; -typedef png_info FAR * FAR * png_infopp; - /* Maximum positive integer used in PNG is (2^31)-1 */ #define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL) #define PNG_UINT_32_MAX ((png_uint_32)(-1)) @@ -839,16 +905,8 @@ typedef struct png_row_info_struct png_byte pixel_depth; /* bits per pixel (depth * channels) */ } png_row_info; -typedef png_row_info FAR * png_row_infop; -typedef png_row_info FAR * FAR * png_row_infopp; - -/* The complete definition of png_struct has, as of libpng-1.5.0, - * been moved into a separate header file that is not accessible to - * applications. Read libpng-manual.txt or libpng.3 for more info. - */ -typedef struct png_struct_def png_struct; -typedef PNG_CONST png_struct FAR * png_const_structp; -typedef png_struct FAR * png_structp; +typedef png_row_info * png_row_infop; +typedef png_row_info * * png_row_infopp; /* These are the function types for the I/O functions and for the functions * that allow the user to override the default I/O functions with his or her @@ -895,7 +953,8 @@ typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp, png_unknown_chunkp)); #endif #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED -typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp)); +/* not used anywhere */ +/* typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp)); */ #endif #ifdef PNG_SETJMP_SUPPORTED @@ -951,8 +1010,6 @@ typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp, png_alloc_size_t)); typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp)); -typedef png_struct FAR * FAR * png_structpp; - /* Section 3: exported functions * Here are the function definitions most commonly used. This is not * the place to find out how to use libpng. See libpng-manual.txt for the @@ -988,7 +1045,7 @@ PNG_EXPORT(1, png_uint_32, png_access_version_number, (void)); /* Tell lib we have already handled the first <num_bytes> magic bytes. * Handling more than 8 bytes from the beginning of the file is an error. */ -PNG_EXPORT(2, void, png_set_sig_bytes, (png_structp png_ptr, int num_bytes)); +PNG_EXPORT(2, void, png_set_sig_bytes, (png_structrp png_ptr, int num_bytes)); /* Check sig[start] through sig[start + num_to_check - 1] to see if it's a * PNG file. Returns zero if the supplied bytes match the 8-byte PNG @@ -1016,9 +1073,9 @@ PNG_EXPORTA(5, png_structp, png_create_write_struct, PNG_ALLOCATED); PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); -PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr, +PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structrp png_ptr, png_size_t size)); /* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp @@ -1032,10 +1089,10 @@ PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr, * allocated by the library - the call will return NULL on a mismatch * indicating an ABI mismatch. */ -PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr, +PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structrp 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))) + (*png_set_longjmp_fn((png_ptr), longjmp, (sizeof (jmp_buf)))) #else # define png_jmpbuf(png_ptr) \ (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP) @@ -1045,12 +1102,12 @@ PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr, * will use it; otherwise it will call PNG_ABORT(). This function was * added in libpng-1.5.0. */ -PNG_EXPORTA(9, void, png_longjmp, (png_structp png_ptr, int val), +PNG_EXPORTA(9, void, png_longjmp, (png_const_structrp png_ptr, int val), PNG_NORETURN); #ifdef PNG_READ_SUPPORTED /* Reset the compression stream */ -PNG_EXPORT(10, int, png_reset_zstream, (png_structp png_ptr)); +PNG_EXPORTA(10, int, png_reset_zstream, (png_structrp png_ptr), PNG_DEPRECATED); #endif /* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */ @@ -1068,81 +1125,92 @@ PNG_EXPORTA(12, png_structp, png_create_write_struct_2, #endif /* Write the PNG file signature. */ -PNG_EXPORT(13, void, png_write_sig, (png_structp png_ptr)); +PNG_EXPORT(13, void, png_write_sig, (png_structrp png_ptr)); /* Write a PNG chunk - size, type, (optional) data, CRC. */ -PNG_EXPORT(14, void, png_write_chunk, (png_structp png_ptr, png_const_bytep +PNG_EXPORT(14, void, png_write_chunk, (png_structrp png_ptr, png_const_bytep chunk_name, png_const_bytep data, png_size_t length)); /* Write the start of a PNG chunk - length and chunk name. */ -PNG_EXPORT(15, void, png_write_chunk_start, (png_structp png_ptr, +PNG_EXPORT(15, void, png_write_chunk_start, (png_structrp png_ptr, png_const_bytep chunk_name, png_uint_32 length)); /* Write the data of a PNG chunk started with png_write_chunk_start(). */ -PNG_EXPORT(16, void, png_write_chunk_data, (png_structp png_ptr, +PNG_EXPORT(16, void, png_write_chunk_data, (png_structrp png_ptr, png_const_bytep data, png_size_t length)); /* Finish a chunk started with png_write_chunk_start() (includes CRC). */ -PNG_EXPORT(17, void, png_write_chunk_end, (png_structp png_ptr)); +PNG_EXPORT(17, void, png_write_chunk_end, (png_structrp png_ptr)); /* Allocate and initialize the info structure */ -PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_structp png_ptr), +PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_const_structrp png_ptr), PNG_ALLOCATED); -PNG_EXPORT(19, void, png_info_init_3, (png_infopp info_ptr, - png_size_t png_info_struct_size)); +/* DEPRECATED: this function allowed init structures to be created using the + * default allocation method (typically malloc). Use is deprecated in 1.6.0 and + * the API will be removed in the future. + */ +PNG_EXPORTA(19, void, png_info_init_3, (png_infopp info_ptr, + png_size_t png_info_struct_size), PNG_DEPRECATED); /* Writes all the PNG information before the image. */ PNG_EXPORT(20, void, png_write_info_before_PLTE, - (png_structp png_ptr, png_infop info_ptr)); + (png_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(21, void, png_write_info, - (png_structp png_ptr, png_infop info_ptr)); + (png_structrp png_ptr, png_const_inforp info_ptr)); #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the information before the actual image data. */ PNG_EXPORT(22, void, png_read_info, - (png_structp png_ptr, png_infop info_ptr)); + (png_structrp png_ptr, png_inforp info_ptr)); #endif #ifdef PNG_TIME_RFC1123_SUPPORTED -PNG_EXPORT(23, png_const_charp, png_convert_to_rfc1123, - (png_structp png_ptr, + /* Convert to a US string format: there is no localization support in this + * routine. The original implementation used a 29 character buffer in + * png_struct, this will be removed in future versions. + */ +#if PNG_LIBPNG_VER < 10700 +/* To do: remove this from libpng17 (and from libpng17/png.c and pngstruct.h) */ +PNG_EXPORTA(23, png_const_charp, png_convert_to_rfc1123, (png_structrp png_ptr, + png_const_timep ptime),PNG_DEPRECATED); +#endif +PNG_EXPORT(241, int, png_convert_to_rfc1123_buffer, (char out[29], png_const_timep ptime)); #endif #ifdef PNG_CONVERT_tIME_SUPPORTED /* Convert from a struct tm to png_time */ PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime, - PNG_CONST struct tm FAR * ttime)); + const struct tm * ttime)); /* Convert from time_t to png_time. Uses gmtime() */ -PNG_EXPORT(25, void, png_convert_from_time_t, - (png_timep ptime, time_t ttime)); -#endif /* PNG_CONVERT_tIME_SUPPORTED */ +PNG_EXPORT(25, void, png_convert_from_time_t, (png_timep ptime, time_t ttime)); +#endif /* CONVERT_tIME */ #ifdef PNG_READ_EXPAND_SUPPORTED /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ -PNG_EXPORT(26, void, png_set_expand, (png_structp png_ptr)); -PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structp png_ptr)); -PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structp png_ptr)); -PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structp png_ptr)); +PNG_EXPORT(26, void, png_set_expand, (png_structrp png_ptr)); +PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structrp png_ptr)); +PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structrp png_ptr)); +PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structrp png_ptr)); #endif #ifdef PNG_READ_EXPAND_16_SUPPORTED /* Expand to 16-bit channels, forces conversion of palette to RGB and expansion * of a tRNS chunk if present. */ -PNG_EXPORT(221, void, png_set_expand_16, (png_structp png_ptr)); +PNG_EXPORT(221, void, png_set_expand_16, (png_structrp png_ptr)); #endif #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) /* Use blue, green, red order for pixels. */ -PNG_EXPORT(30, void, png_set_bgr, (png_structp png_ptr)); +PNG_EXPORT(30, void, png_set_bgr, (png_structrp png_ptr)); #endif #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED /* Expand the grayscale to 24-bit RGB if necessary. */ -PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr)); +PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structrp png_ptr)); #endif #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED @@ -1152,12 +1220,12 @@ PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr)); #define PNG_ERROR_ACTION_ERROR 3 #define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/ -PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr, - int error_action, double red, double green)); -PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr, - int error_action, png_fixed_point red, png_fixed_point green)); +PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structrp png_ptr, + int error_action, double red, double green)) +PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structrp png_ptr, + int error_action, png_fixed_point red, png_fixed_point green)) -PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp +PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structrp png_ptr)); #endif @@ -1167,9 +1235,9 @@ PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth, #endif #ifdef PNG_READ_ALPHA_MODE_SUPPORTED -/* How the alpha channel is interpreted - this affects how the color channels of - * a PNG file are returned when an alpha channel, or tRNS chunk in a palette - * file, is present. +/* How the alpha channel is interpreted - this affects how the color channels + * of a PNG file are returned to the calling application when an alpha channel, + * or a tRNS chunk in a palette file, is present. * * This has no effect on the way pixels are written into a PNG output * datastream. The color samples in a PNG datastream are never premultiplied @@ -1177,33 +1245,19 @@ PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth, * * The default is to return data according to the PNG specification: the alpha * channel is a linear measure of the contribution of the pixel to the - * corresponding composited pixel. The gamma encoded color channels must be - * scaled according to the contribution and to do this it is necessary to undo + * corresponding composited pixel, and the color channels are unassociated + * (not premultiplied). The gamma encoded color channels must be scaled + * according to the contribution and to do this it is necessary to undo * the encoding, scale the color values, perform the composition and reencode * the values. This is the 'PNG' mode. * * The alternative is to 'associate' the alpha with the color information by - * storing color channel values that have been scaled by the alpha. The - * advantage is that the color channels can be resampled (the image can be - * scaled) in this form. The disadvantage is that normal practice is to store - * linear, not (gamma) encoded, values and this requires 16-bit channels for - * still images rather than the 8-bit channels that are just about sufficient if - * gamma encoding is used. In addition all non-transparent pixel values, - * including completely opaque ones, must be gamma encoded to produce the final - * image. This is the 'STANDARD', 'ASSOCIATED' or 'PREMULTIPLIED' mode (the - * latter being the two common names for associated alpha color channels.) - * - * Since it is not necessary to perform arithmetic on opaque color values so - * long as they are not to be resampled and are in the final color space it is - * possible to optimize the handling of alpha by storing the opaque pixels in - * the PNG format (adjusted for the output color space) while storing partially - * opaque pixels in the standard, linear, format. The accuracy required for - * standard alpha composition is relatively low, because the pixels are - * isolated, therefore typically the accuracy loss in storing 8-bit linear - * values is acceptable. (This is not true if the alpha channel is used to - * simulate transparency over large areas - use 16 bits or the PNG mode in - * this case!) This is the 'OPTIMIZED' mode. For this mode a pixel is - * treated as opaque only if the alpha value is equal to the maximum value. + * storing color channel values that have been scaled by the alpha. + * image. These are the 'STANDARD', 'ASSOCIATED' or 'PREMULTIPLIED' modes + * (the latter being the two common names for associated alpha color channels). + * + * For the 'OPTIMIZED' mode, a pixel is treated as opaque only if the alpha + * value is equal to the maximum value. * * The final choice is to gamma encode the alpha channel as well. This is * broken because, in practice, no implementation that uses this choice @@ -1222,76 +1276,15 @@ PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth, #define PNG_ALPHA_OPTIMIZED 2 /* 'PNG' for opaque pixels, else 'STANDARD' */ #define PNG_ALPHA_BROKEN 3 /* the alpha channel is gamma encoded */ -PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structp png_ptr, int mode, - double output_gamma)); -PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structp png_ptr, - int mode, png_fixed_point output_gamma)); +PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structrp png_ptr, int mode, + double output_gamma)) +PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structrp png_ptr, + int mode, png_fixed_point output_gamma)) #endif -#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED) +#if defined(PNG_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED) /* The output_gamma value is a screen gamma in libpng terminology: it expresses - * how to decode the output values, not how they are encoded. The values used - * correspond to the normal numbers used to describe the overall gamma of a - * computer display system; for example 2.2 for an sRGB conformant system. The - * values are scaled by 100000 in the _fixed version of the API (so 220000 for - * sRGB.) - * - * The inverse of the value is always used to provide a default for the PNG file - * encoding if it has no gAMA chunk and if png_set_gamma() has not been called - * to override the PNG gamma information. - * - * When the ALPHA_OPTIMIZED mode is selected the output gamma is used to encode - * opaque pixels however pixels with lower alpha values are not encoded, - * regardless of the output gamma setting. - * - * When the standard Porter Duff handling is requested with mode 1 the output - * encoding is set to be linear and the output_gamma value is only relevant - * as a default for input data that has no gamma information. The linear output - * encoding will be overridden if png_set_gamma() is called - the results may be - * highly unexpected! - * - * The following numbers are derived from the sRGB standard and the research - * behind it. sRGB is defined to be approximated by a PNG gAMA chunk value of - * 0.45455 (1/2.2) for PNG. The value implicitly includes any viewing - * correction required to take account of any differences in the color - * environment of the original scene and the intended display environment; the - * value expresses how to *decode* the image for display, not how the original - * data was *encoded*. - * - * sRGB provides a peg for the PNG standard by defining a viewing environment. - * sRGB itself, and earlier TV standards, actually use a more complex transform - * (a linear portion then a gamma 2.4 power law) than PNG can express. (PNG is - * limited to simple power laws.) By saying that an image for direct display on - * an sRGB conformant system should be stored with a gAMA chunk value of 45455 - * (11.3.3.2 and 11.3.3.5 of the ISO PNG specification) the PNG specification - * makes it possible to derive values for other display systems and - * environments. - * - * The Mac value is deduced from the sRGB based on an assumption that the actual - * extra viewing correction used in early Mac display systems was implemented as - * a power 1.45 lookup table. - * - * Any system where a programmable lookup table is used or where the behavior of - * the final display device characteristics can be changed requires system - * specific code to obtain the current characteristic. However this can be - * difficult and most PNG gamma correction only requires an approximate value. - * - * By default, if png_set_alpha_mode() is not called, libpng assumes that all - * values are unencoded, linear, values and that the output device also has a - * linear characteristic. This is only very rarely correct - it is invariably - * better to call png_set_alpha_mode() with PNG_DEFAULT_sRGB than rely on the - * default if you don't know what the right answer is! - * - * The special value PNG_GAMMA_MAC_18 indicates an older Mac system (pre Mac OS - * 10.6) which used a correction table to implement a somewhat lower gamma on an - * otherwise sRGB system. - * - * Both these values are reserved (not simple gamma values) in order to allow - * more precise correction internally in the future. - * - * NOTE: the following values can be passed to either the fixed or floating - * point APIs, but the floating point API will also accept floating point - * values. + * how to decode the output values, not how they are encoded. */ #define PNG_DEFAULT_sRGB -1 /* sRGB gamma and color space */ #define PNG_GAMMA_MAC_18 -2 /* Old Mac '1.8' gamma and color space */ @@ -1376,51 +1369,50 @@ PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structp png_ptr, */ #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED -PNG_EXPORT(36, void, png_set_strip_alpha, (png_structp png_ptr)); +PNG_EXPORT(36, void, png_set_strip_alpha, (png_structrp png_ptr)); #endif #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) -PNG_EXPORT(37, void, png_set_swap_alpha, (png_structp png_ptr)); +PNG_EXPORT(37, void, png_set_swap_alpha, (png_structrp png_ptr)); #endif #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) -PNG_EXPORT(38, void, png_set_invert_alpha, (png_structp png_ptr)); +PNG_EXPORT(38, void, png_set_invert_alpha, (png_structrp png_ptr)); #endif #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) /* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ -PNG_EXPORT(39, void, png_set_filler, (png_structp png_ptr, png_uint_32 filler, +PNG_EXPORT(39, void, png_set_filler, (png_structrp 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(40, void, png_set_add_alpha, - (png_structp png_ptr, png_uint_32 filler, - int flags)); -#endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ +PNG_EXPORT(40, void, png_set_add_alpha, (png_structrp png_ptr, + png_uint_32 filler, int flags)); +#endif /* READ_FILLER || WRITE_FILLER */ #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) /* Swap bytes in 16-bit depth files. */ -PNG_EXPORT(41, void, png_set_swap, (png_structp png_ptr)); +PNG_EXPORT(41, void, png_set_swap, (png_structrp 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. */ -PNG_EXPORT(42, void, png_set_packing, (png_structp png_ptr)); +PNG_EXPORT(42, void, png_set_packing, (png_structrp png_ptr)); #endif #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ defined(PNG_WRITE_PACKSWAP_SUPPORTED) /* Swap packing order of pixels in bytes. */ -PNG_EXPORT(43, void, png_set_packswap, (png_structp png_ptr)); +PNG_EXPORT(43, void, png_set_packswap, (png_structrp png_ptr)); #endif #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) /* Converts files to legal bit depths. */ -PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p +PNG_EXPORT(44, void, png_set_shift, (png_structrp png_ptr, png_const_color_8p true_bits)); #endif @@ -1432,12 +1424,12 @@ PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p * necessary to call png_read_row or png_read_rows png_get_image_height * times for each pass. */ -PNG_EXPORT(45, int, png_set_interlace_handling, (png_structp png_ptr)); +PNG_EXPORT(45, int, png_set_interlace_handling, (png_structrp png_ptr)); #endif #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) /* Invert monochrome files */ -PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr)); +PNG_EXPORT(46, void, png_set_invert_mono, (png_structrp png_ptr)); #endif #ifdef PNG_READ_BACKGROUND_SUPPORTED @@ -1446,12 +1438,12 @@ PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr)); * read. Doing so will result in unexpected behavior and possible warnings or * errors if the PNG file contains a bKGD chunk. */ -PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr, +PNG_FP_EXPORT(47, void, png_set_background, (png_structrp png_ptr, png_const_color_16p background_color, int background_gamma_code, - int need_expand, double background_gamma)); -PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr, + int need_expand, double background_gamma)) +PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structrp png_ptr, png_const_color_16p background_color, int background_gamma_code, - int need_expand, png_fixed_point background_gamma)); + int need_expand, png_fixed_point background_gamma)) #endif #ifdef PNG_READ_BACKGROUND_SUPPORTED # define PNG_BACKGROUND_GAMMA_UNKNOWN 0 @@ -1462,23 +1454,22 @@ PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr, #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED /* Scale a 16-bit depth file down to 8-bit, accurately. */ -PNG_EXPORT(229, void, png_set_scale_16, (png_structp png_ptr)); +PNG_EXPORT(229, void, png_set_scale_16, (png_structrp png_ptr)); #endif #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED #define PNG_READ_16_TO_8 SUPPORTED /* Name prior to 1.5.4 */ /* Strip the second byte of information from a 16-bit depth file. */ -PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr)); +PNG_EXPORT(48, void, png_set_strip_16, (png_structrp png_ptr)); #endif #ifdef PNG_READ_QUANTIZE_SUPPORTED /* Turn on quantizing, and reduce the palette to the number of colors * available. */ -PNG_EXPORT(49, void, png_set_quantize, - (png_structp png_ptr, png_colorp palette, - int num_palette, int maximum_colors, png_const_uint_16p histogram, - int full_quantize)); +PNG_EXPORT(49, void, png_set_quantize, (png_structrp png_ptr, + png_colorp palette, int num_palette, int maximum_colors, + png_const_uint_16p histogram, int full_quantize)); #endif #ifdef PNG_READ_GAMMA_SUPPORTED @@ -1498,71 +1489,69 @@ PNG_EXPORT(49, void, png_set_quantize, * API (floating point or fixed.) Notice, however, that the 'file_gamma' value * is the inverse of a 'screen gamma' value. */ -PNG_FP_EXPORT(50, void, png_set_gamma, - (png_structp png_ptr, double screen_gamma, - double override_file_gamma)); -PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr, - png_fixed_point screen_gamma, png_fixed_point override_file_gamma)); +PNG_FP_EXPORT(50, void, png_set_gamma, (png_structrp png_ptr, + double screen_gamma, double override_file_gamma)) +PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structrp png_ptr, + png_fixed_point screen_gamma, png_fixed_point override_file_gamma)) #endif #ifdef PNG_WRITE_FLUSH_SUPPORTED /* Set how many lines between output flushes - 0 for no flushing */ -PNG_EXPORT(51, void, png_set_flush, (png_structp png_ptr, int nrows)); +PNG_EXPORT(51, void, png_set_flush, (png_structrp png_ptr, int nrows)); /* Flush the current PNG output buffer */ -PNG_EXPORT(52, void, png_write_flush, (png_structp png_ptr)); +PNG_EXPORT(52, void, png_write_flush, (png_structrp png_ptr)); #endif /* Optional update palette with requested transformations */ -PNG_EXPORT(53, void, png_start_read_image, (png_structp png_ptr)); +PNG_EXPORT(53, void, png_start_read_image, (png_structrp png_ptr)); /* Optional call to update the users info structure */ -PNG_EXPORT(54, void, png_read_update_info, - (png_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(54, void, png_read_update_info, (png_structrp png_ptr, + png_inforp info_ptr)); #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read one or more rows of image data. */ -PNG_EXPORT(55, void, png_read_rows, (png_structp png_ptr, png_bytepp row, +PNG_EXPORT(55, void, png_read_rows, (png_structrp png_ptr, png_bytepp row, png_bytepp display_row, png_uint_32 num_rows)); #endif #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read a row of data. */ -PNG_EXPORT(56, void, png_read_row, (png_structp png_ptr, png_bytep row, +PNG_EXPORT(56, void, png_read_row, (png_structrp png_ptr, png_bytep row, png_bytep display_row)); #endif #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the whole image into memory at once. */ -PNG_EXPORT(57, void, png_read_image, (png_structp png_ptr, png_bytepp image)); +PNG_EXPORT(57, void, png_read_image, (png_structrp png_ptr, png_bytepp image)); #endif /* Write a row of image data */ -PNG_EXPORT(58, void, png_write_row, - (png_structp png_ptr, png_const_bytep row)); +PNG_EXPORT(58, void, png_write_row, (png_structrp png_ptr, + png_const_bytep row)); /* Write a few rows of image data: (*row) is not written; however, the type * is declared as writeable to maintain compatibility with previous versions * of libpng and to allow the 'display_row' array from read_rows to be passed * unchanged to write_rows. */ -PNG_EXPORT(59, void, png_write_rows, (png_structp png_ptr, png_bytepp row, +PNG_EXPORT(59, void, png_write_rows, (png_structrp png_ptr, png_bytepp row, png_uint_32 num_rows)); /* Write the image data */ -PNG_EXPORT(60, void, png_write_image, - (png_structp png_ptr, png_bytepp image)); +PNG_EXPORT(60, void, png_write_image, (png_structrp png_ptr, png_bytepp image)); /* Write the end of the PNG file. */ -PNG_EXPORT(61, void, png_write_end, - (png_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(61, void, png_write_end, (png_structrp png_ptr, + png_inforp info_ptr)); #ifdef PNG_SEQUENTIAL_READ_SUPPORTED /* Read the end of the PNG file. */ -PNG_EXPORT(62, void, png_read_end, (png_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(62, void, png_read_end, (png_structrp png_ptr, png_inforp info_ptr)); #endif /* Free any memory associated with the png_info_struct */ -PNG_EXPORT(63, void, png_destroy_info_struct, (png_structp png_ptr, +PNG_EXPORT(63, void, png_destroy_info_struct, (png_const_structrp png_ptr, png_infopp info_ptr_ptr)); /* Free any memory associated with the png_struct and the png_info_structs */ @@ -1574,8 +1563,8 @@ PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)); /* Set the libpng method of handling chunk CRC errors */ -PNG_EXPORT(66, void, png_set_crc_action, - (png_structp png_ptr, int crit_action, int ancil_action)); +PNG_EXPORT(66, void, png_set_crc_action, (png_structrp png_ptr, int crit_action, + int ancil_action)); /* Values for png_set_crc_action() say how to handle CRC errors in * ancillary and critical chunks, and whether to use the data contained @@ -1593,6 +1582,7 @@ PNG_EXPORT(66, void, png_set_crc_action, #define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ #define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ +#ifdef PNG_WRITE_SUPPORTED /* These functions give the user control over the scan-line filtering in * libpng and the compression methods used by zlib. These functions are * mainly useful for testing, as the defaults should work with most users. @@ -1604,8 +1594,9 @@ PNG_EXPORT(66, void, png_set_crc_action, /* Set the filtering method(s) used by libpng. Currently, the only valid * value for "method" is 0. */ -PNG_EXPORT(67, void, png_set_filter, - (png_structp png_ptr, int method, int filters)); +PNG_EXPORT(67, void, png_set_filter, (png_structrp png_ptr, int method, + int filters)); +#endif /* WRITE */ /* Flags for png_set_filter() to say which filters to use. The flags * are chosen so that they don't conflict with real filter types @@ -1631,6 +1622,7 @@ PNG_EXPORT(67, void, png_set_filter, #define PNG_FILTER_VALUE_PAETH 4 #define PNG_FILTER_VALUE_LAST 5 +#ifdef PNG_WRITE_SUPPORTED #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 @@ -1660,14 +1652,14 @@ PNG_EXPORT(67, void, png_set_filter, * the weights and costs are set to 1.0, this degenerates the WEIGHTED method * to the UNWEIGHTED method, but with added encoding time/computation. */ -PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr, +PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structrp png_ptr, int heuristic_method, int num_weights, png_const_doublep filter_weights, - png_const_doublep filter_costs)); + png_const_doublep filter_costs)) PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, - (png_structp png_ptr, - int heuristic_method, int num_weights, png_const_fixed_point_p - filter_weights, png_const_fixed_point_p filter_costs)); -#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ + (png_structrp png_ptr, int heuristic_method, int num_weights, + png_const_fixed_point_p filter_weights, + png_const_fixed_point_p filter_costs)) +#endif /* WRITE_WEIGHTED_FILTER */ /* Heuristic used for row filter selection. These defines should NOT be * changed. @@ -1677,7 +1669,6 @@ PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, #define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ #define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ -#ifdef PNG_WRITE_SUPPORTED /* Set the library compression level. Currently, valid values range from * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 * (0 - no compression, 9 - "maximal" compression). Note that tests have @@ -1685,45 +1676,47 @@ PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, * for PNG images, and do considerably fewer caclulations. In the future, * these values may not correspond directly to the zlib compression levels. */ -PNG_EXPORT(69, void, png_set_compression_level, - (png_structp png_ptr, int level)); +#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED +PNG_EXPORT(69, void, png_set_compression_level, (png_structrp png_ptr, + int level)); -PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structp png_ptr, +PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structrp png_ptr, int mem_level)); -PNG_EXPORT(71, void, png_set_compression_strategy, (png_structp png_ptr, +PNG_EXPORT(71, void, png_set_compression_strategy, (png_structrp png_ptr, int strategy)); /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a * smaller value of window_bits if it can do so safely. */ -PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr, +PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structrp png_ptr, int window_bits)); -PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr, +PNG_EXPORT(73, void, png_set_compression_method, (png_structrp png_ptr, int method)); -#endif +#endif /* WRITE_CUSTOMIZE_COMPRESSION */ #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED /* Also set zlib parameters for compressing non-IDAT chunks */ -PNG_EXPORT(222, void, png_set_text_compression_level, - (png_structp png_ptr, int level)); +PNG_EXPORT(222, void, png_set_text_compression_level, (png_structrp png_ptr, + int level)); -PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structp png_ptr, +PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structrp png_ptr, int mem_level)); -PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structp png_ptr, +PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structrp png_ptr, int strategy)); /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a * smaller value of window_bits if it can do so safely. */ -PNG_EXPORT(225, void, png_set_text_compression_window_bits, (png_structp - png_ptr, int window_bits)); +PNG_EXPORT(225, void, png_set_text_compression_window_bits, + (png_structrp png_ptr, int window_bits)); -PNG_EXPORT(226, void, png_set_text_compression_method, (png_structp png_ptr, +PNG_EXPORT(226, void, png_set_text_compression_method, (png_structrp png_ptr, int method)); -#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ +#endif /* WRITE_CUSTOMIZE_ZTXT_COMPRESSION */ +#endif /* WRITE */ /* These next functions are called for input/output, memory, and error * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, @@ -1736,7 +1729,7 @@ PNG_EXPORT(226, void, png_set_text_compression_method, (png_structp png_ptr, #ifdef PNG_STDIO_SUPPORTED /* Initialize the input/output for the PNG file to the default functions. */ -PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp)); +PNG_EXPORT(74, void, png_init_io, (png_structrp png_ptr, png_FILE_p fp)); #endif /* Replace the (error and abort), and warning functions with user @@ -1747,12 +1740,11 @@ PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp)); * default function will be used. */ -PNG_EXPORT(75, void, png_set_error_fn, - (png_structp png_ptr, png_voidp error_ptr, - png_error_ptr error_fn, png_error_ptr warning_fn)); +PNG_EXPORT(75, void, png_set_error_fn, (png_structrp 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 */ -PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr)); +PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structrp 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. @@ -1764,47 +1756,47 @@ PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr)); * default flush function, which uses the standard *FILE structure, will * be used. */ -PNG_EXPORT(77, void, png_set_write_fn, (png_structp png_ptr, png_voidp io_ptr, +PNG_EXPORT(77, void, png_set_write_fn, (png_structrp 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. */ -PNG_EXPORT(78, void, png_set_read_fn, (png_structp png_ptr, png_voidp io_ptr, +PNG_EXPORT(78, void, png_set_read_fn, (png_structrp png_ptr, png_voidp io_ptr, png_rw_ptr read_data_fn)); /* Return the user pointer associated with the I/O functions */ -PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_structp png_ptr)); +PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_const_structrp png_ptr)); -PNG_EXPORT(80, void, png_set_read_status_fn, (png_structp png_ptr, +PNG_EXPORT(80, void, png_set_read_status_fn, (png_structrp png_ptr, png_read_status_ptr read_row_fn)); -PNG_EXPORT(81, void, png_set_write_status_fn, (png_structp png_ptr, +PNG_EXPORT(81, void, png_set_write_status_fn, (png_structrp 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). */ -PNG_EXPORT(82, void, png_set_mem_fn, (png_structp png_ptr, png_voidp mem_ptr, +PNG_EXPORT(82, void, png_set_mem_fn, (png_structrp 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 */ -PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structp png_ptr)); +PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structrp png_ptr)); #endif #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED -PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structp png_ptr, +PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structrp png_ptr, png_user_transform_ptr read_user_transform_fn)); #endif #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED -PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structp png_ptr, +PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structrp png_ptr, png_user_transform_ptr write_user_transform_fn)); #endif #ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED -PNG_EXPORT(86, void, png_set_user_transform_info, (png_structp png_ptr, +PNG_EXPORT(86, void, png_set_user_transform_info, (png_structrp 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 */ PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); #endif #ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED @@ -1819,31 +1811,53 @@ PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr, * find the output pixel (x,y) given an interlaced sub-image pixel * (row,col,pass). (See below for these macros.) */ -PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structp)); -PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structp)); +PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structrp)); +PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structrp)); #endif -#ifdef PNG_USER_CHUNKS_SUPPORTED -PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structp png_ptr, +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED +/* This callback is called only for *unknown* chunks. If + * PNG_HANDLE_AS_UNKNOWN_SUPPORTED is set then it is possible to set known + * chunks to be treated as unknown, however in this case the callback must do + * any processing required by the chunk (e.g. by calling the appropriate + * png_set_ APIs.) + * + * There is no write support - on write, by default, all the chunks in the + * 'unknown' list are written in the specified position. + * + * The integer return from the callback function is interpreted thus: + * + * negative: An error occurred; png_chunk_error will be called. + * zero: The chunk was not handled, the chunk will be saved. A critical + * chunk will cause an error at this point unless it is to be saved. + * positive: The chunk was handled, libpng will ignore/discard it. + * + * See "INTERACTION WTIH USER CHUNK CALLBACKS" below for important notes about + * how this behavior will change in libpng 1.7 + */ +PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structrp png_ptr, png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); -PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structp png_ptr)); +#endif + +#ifdef PNG_USER_CHUNKS_SUPPORTED +PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structrp png_ptr)); #endif #ifdef PNG_PROGRESSIVE_READ_SUPPORTED /* Sets the function callbacks for the push reader, and a pointer to a * user-defined structure available to the callback functions. */ -PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr, +PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structrp 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 */ -PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structp png_ptr)); +PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, + (png_const_structrp png_ptr)); /* Function to be called when data becomes available */ -PNG_EXPORT(92, void, png_process_data, - (png_structp png_ptr, png_infop info_ptr, - png_bytep buffer, png_size_t buffer_size)); +PNG_EXPORT(92, void, png_process_data, (png_structrp png_ptr, + png_inforp info_ptr, png_bytep buffer, png_size_t buffer_size)); /* A function which may be called *only* within png_process_data to stop the * processing of any more data. The function returns the number of bytes @@ -1852,7 +1866,7 @@ PNG_EXPORT(92, void, png_process_data, * 'save' is set to true the routine will first save all the pending data and * will always return 0. */ -PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save)); +PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structrp, int save)); /* A function which may be called *only* outside (after) a call to * png_process_data. It returns the number of bytes of data to skip in the @@ -1860,42 +1874,43 @@ PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save)); * application must skip than number of bytes of input data and pass the * following data to the next call to png_process_data. */ -PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp)); +PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structrp)); -#ifdef PNG_READ_INTERLACING_SUPPORTED /* Function that combines rows. 'new_row' is a flag that should come from * the callback and be non-NULL if anything needs to be done; the library * stores its own version of the new data internally and ignores the passed * in value. */ -PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr, +PNG_EXPORT(93, void, png_progressive_combine_row, (png_const_structrp png_ptr, png_bytep old_row, png_const_bytep new_row)); -#endif /* PNG_READ_INTERLACING_SUPPORTED */ -#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ +#endif /* PROGRESSIVE_READ */ -PNG_EXPORTA(94, png_voidp, png_malloc, - (png_structp png_ptr, png_alloc_size_t size), - PNG_ALLOCATED); +PNG_EXPORTA(94, png_voidp, png_malloc, (png_const_structrp png_ptr, + png_alloc_size_t size), PNG_ALLOCATED); /* Added at libpng version 1.4.0 */ -PNG_EXPORTA(95, png_voidp, png_calloc, - (png_structp png_ptr, png_alloc_size_t size), - PNG_ALLOCATED); +PNG_EXPORTA(95, png_voidp, png_calloc, (png_const_structrp png_ptr, + png_alloc_size_t size), PNG_ALLOCATED); /* Added at libpng version 1.2.4 */ -PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_structp png_ptr, +PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_const_structrp png_ptr, png_alloc_size_t size), PNG_ALLOCATED); /* Frees a pointer allocated by png_malloc() */ -PNG_EXPORT(97, void, png_free, (png_structp png_ptr, png_voidp ptr)); +PNG_EXPORT(97, void, png_free, (png_const_structrp png_ptr, png_voidp ptr)); /* Free data that was allocated internally */ -PNG_EXPORT(98, void, png_free_data, - (png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num)); +PNG_EXPORT(98, void, png_free_data, (png_const_structrp png_ptr, + png_inforp info_ptr, png_uint_32 free_me, int num)); /* Reassign responsibility for freeing existing data, whether allocated - * by libpng or by the application */ -PNG_EXPORT(99, void, png_data_freer, - (png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask)); + * by libpng or by the application; this works on the png_info structure passed + * in, it does not change the state for other png_info structures. + * + * It is unlikely that this function works correctly as of 1.6.0 and using it + * may result either in memory leaks or double free of allocated data. + */ +PNG_EXPORT(99, void, png_data_freer, (png_const_structrp png_ptr, + png_inforp info_ptr, int freer, png_uint_32 mask)); /* Assignments for png_data_freer */ #define PNG_DESTROY_WILL_FREE_DATA 1 @@ -1908,8 +1923,10 @@ PNG_EXPORT(99, void, png_data_freer, #define PNG_FREE_ROWS 0x0040 #define PNG_FREE_PCAL 0x0080 #define PNG_FREE_SCAL 0x0100 -#define PNG_FREE_UNKN 0x0200 -#define PNG_FREE_LIST 0x0400 +#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED +# define PNG_FREE_UNKN 0x0200 +#endif +/* PNG_FREE_LIST 0x0400 removed in 1.6.0 because it is ignored */ #define PNG_FREE_PLTE 0x1000 #define PNG_FREE_TRNS 0x2000 #define PNG_FREE_TEXT 0x4000 @@ -1917,50 +1934,55 @@ PNG_EXPORT(99, void, png_data_freer, #define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ #ifdef PNG_USER_MEM_SUPPORTED -PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_structp png_ptr, - png_alloc_size_t size), PNG_ALLOCATED); -PNG_EXPORT(101, void, png_free_default, (png_structp png_ptr, png_voidp ptr)); +PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_const_structrp png_ptr, + png_alloc_size_t size), PNG_ALLOCATED PNG_DEPRECATED); +PNG_EXPORTA(101, void, png_free_default, (png_const_structrp png_ptr, + png_voidp ptr), PNG_DEPRECATED); #endif #ifdef PNG_ERROR_TEXT_SUPPORTED /* Fatal error in PNG image of libpng - can't continue */ -PNG_EXPORTA(102, void, png_error, - (png_structp png_ptr, png_const_charp error_message), - PNG_NORETURN); +PNG_EXPORTA(102, void, png_error, (png_const_structrp png_ptr, + png_const_charp error_message), PNG_NORETURN); /* The same, but the chunk name is prepended to the error string. */ -PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr, +PNG_EXPORTA(103, void, png_chunk_error, (png_const_structrp png_ptr, png_const_charp error_message), PNG_NORETURN); #else /* Fatal error in PNG image of libpng - can't continue */ -PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN); +PNG_EXPORTA(104, void, png_err, (png_const_structrp png_ptr), PNG_NORETURN); +# define png_error(s1,s2) png_err(s1) +# define png_chunk_error(s1,s2) png_err(s1) #endif #ifdef PNG_WARNINGS_SUPPORTED /* Non-fatal error in libpng. Can continue, but may have a problem. */ -PNG_EXPORT(105, void, png_warning, (png_structp png_ptr, +PNG_EXPORT(105, void, png_warning, (png_const_structrp png_ptr, png_const_charp warning_message)); /* Non-fatal error in libpng, chunk name is prepended to message. */ -PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr, +PNG_EXPORT(106, void, png_chunk_warning, (png_const_structrp png_ptr, png_const_charp warning_message)); +#else +# define png_warning(s1,s2) ((void)(s1)) +# define png_chunk_warning(s1,s2) ((void)(s1)) #endif #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. */ -# undef png_benign_error -PNG_EXPORT(107, void, png_benign_error, (png_structp png_ptr, +PNG_EXPORT(107, void, png_benign_error, (png_const_structrp png_ptr, png_const_charp warning_message)); -/* Same, chunk name is prepended to message. */ -# undef png_chunk_benign_error -PNG_EXPORT(108, void, png_chunk_benign_error, (png_structp png_ptr, +#ifdef PNG_READ_SUPPORTED +/* Same, chunk name is prepended to message (only during read) */ +PNG_EXPORT(108, void, png_chunk_benign_error, (png_const_structrp png_ptr, png_const_charp warning_message)); +#endif PNG_EXPORT(109, void, png_set_benign_errors, - (png_structp png_ptr, int allowed)); + (png_structrp png_ptr, int allowed)); #else # ifdef PNG_ALLOW_BENIGN_ERRORS # define png_benign_error png_warning @@ -1984,289 +2006,274 @@ PNG_EXPORT(109, void, png_set_benign_errors, * png_info_struct. */ /* Returns "flag" if chunk data is valid in info_ptr. */ -PNG_EXPORT(110, png_uint_32, png_get_valid, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_uint_32 flag)); +PNG_EXPORT(110, png_uint_32, png_get_valid, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_uint_32 flag)); /* Returns number of bytes needed to hold a transformed row. */ -PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); #ifdef PNG_INFO_IMAGE_SUPPORTED /* Returns row_pointers, which is an array of pointers to scanlines that was * returned from png_read_png(). */ -PNG_EXPORT(112, png_bytepp, png_get_rows, - (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(112, png_bytepp, png_get_rows, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); + /* Set row_pointers, which is an array of pointers to scanlines for use * by png_write_png(). */ -PNG_EXPORT(113, void, png_set_rows, (png_structp png_ptr, - png_infop info_ptr, png_bytepp row_pointers)); +PNG_EXPORT(113, void, png_set_rows, (png_const_structrp png_ptr, + png_inforp info_ptr, png_bytepp row_pointers)); #endif /* Returns number of color channels in image. */ -PNG_EXPORT(114, png_byte, png_get_channels, - (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(114, png_byte, png_get_channels, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); #ifdef PNG_EASY_ACCESS_SUPPORTED /* Returns image width in pixels. */ -PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image height in pixels. */ -PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image bit_depth. */ -PNG_EXPORT(117, png_byte, png_get_bit_depth, - (png_const_structp png_ptr, png_const_infop info_ptr)); +PNG_EXPORT(117, png_byte, png_get_bit_depth, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image color_type. */ -PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image filter_type. */ -PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image interlace_type. */ -PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image compression_type. */ -PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); /* Returns image resolution in pixels per meter, from pHYs chunk data. */ PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); /* Returns pixel aspect ratio, computed from pHYs chunk data. */ PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)) PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)) /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(128, png_int_32, png_get_x_offset_microns, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(129, png_int_32, png_get_y_offset_microns, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); -#endif /* PNG_EASY_ACCESS_SUPPORTED */ +#endif /* EASY_ACCESS */ +#ifdef PNG_READ_SUPPORTED /* Returns pointer to signature string read from PNG header */ -PNG_EXPORT(130, png_const_bytep, png_get_signature, - (png_const_structp png_ptr, png_infop info_ptr)); +PNG_EXPORT(130, png_const_bytep, png_get_signature, (png_const_structrp png_ptr, + png_const_inforp info_ptr)); +#endif #ifdef PNG_bKGD_SUPPORTED -PNG_EXPORT(131, png_uint_32, png_get_bKGD, - (png_const_structp png_ptr, png_infop info_ptr, - png_color_16p *background)); +PNG_EXPORT(131, png_uint_32, png_get_bKGD, (png_const_structrp png_ptr, + png_inforp info_ptr, png_color_16p *background)); #endif #ifdef PNG_bKGD_SUPPORTED -PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr, - png_const_color_16p background)); +PNG_EXPORT(132, void, png_set_bKGD, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_color_16p background)); #endif #ifdef PNG_cHRM_SUPPORTED -PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr, - png_const_infop info_ptr, double *white_x, double *white_y, double *red_x, +PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structrp png_ptr, + png_const_inforp 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)); -PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_structp png_ptr, - png_const_infop info_ptr, double *red_X, double *red_Y, double *red_Z, + double *blue_y)) +PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_const_structrp png_ptr, + png_const_inforp info_ptr, double *red_X, double *red_Y, double *red_Z, double *green_X, double *green_Y, double *green_Z, double *blue_X, - double *blue_Y, double *blue_Z)); -#ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */ + double *blue_Y, double *blue_Z)) PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed, - (png_const_structp png_ptr, - png_const_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, - png_fixed_point *int_blue_y)); -#endif + (png_const_structrp png_ptr, png_const_inforp 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, png_fixed_point *int_blue_y)) PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed, - (png_structp png_ptr, png_const_infop info_ptr, + (png_const_structrp png_ptr, png_const_inforp info_ptr, png_fixed_point *int_red_X, png_fixed_point *int_red_Y, png_fixed_point *int_red_Z, png_fixed_point *int_green_X, png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, - png_fixed_point *int_blue_Z)); + png_fixed_point *int_blue_Z)) #endif #ifdef PNG_cHRM_SUPPORTED -PNG_FP_EXPORT(135, void, png_set_cHRM, - (png_structp png_ptr, png_infop info_ptr, +PNG_FP_EXPORT(135, void, png_set_cHRM, (png_const_structrp png_ptr, + png_inforp 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)); -PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_structp png_ptr, - png_infop info_ptr, double red_X, double red_Y, double red_Z, + double green_y, double blue_x, double blue_y)) +PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_const_structrp png_ptr, + png_inforp info_ptr, double red_X, double red_Y, double red_Z, double green_X, double green_Y, double green_Z, double blue_X, - double blue_Y, double blue_Z)); -PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_white_x, + double blue_Y, double blue_Z)) +PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_const_structrp png_ptr, + png_inforp 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, - png_fixed_point int_blue_y)); -PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, + png_fixed_point int_blue_y)) +PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_const_structrp png_ptr, + png_inforp info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, png_fixed_point int_red_Z, png_fixed_point int_green_X, png_fixed_point int_green_Y, png_fixed_point int_green_Z, png_fixed_point int_blue_X, png_fixed_point int_blue_Y, - png_fixed_point int_blue_Z)); + png_fixed_point int_blue_Z)) #endif #ifdef PNG_gAMA_SUPPORTED -PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, - (png_const_structp png_ptr, png_const_infop info_ptr, - double *file_gamma)); +PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, (png_const_structrp png_ptr, + png_const_inforp info_ptr, double *file_gamma)) PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_fixed_point *int_file_gamma)); + (png_const_structrp png_ptr, png_const_inforp info_ptr, + png_fixed_point *int_file_gamma)) #endif #ifdef PNG_gAMA_SUPPORTED -PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr, - png_infop info_ptr, double file_gamma)); -PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr, - png_infop info_ptr, png_fixed_point int_file_gamma)); +PNG_FP_EXPORT(139, void, png_set_gAMA, (png_const_structrp png_ptr, + png_inforp info_ptr, double file_gamma)) +PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_const_structrp png_ptr, + png_inforp info_ptr, png_fixed_point int_file_gamma)) #endif #ifdef PNG_hIST_SUPPORTED -PNG_EXPORT(141, png_uint_32, png_get_hIST, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_uint_16p *hist)); +PNG_EXPORT(141, png_uint_32, png_get_hIST, (png_const_structrp png_ptr, + png_inforp info_ptr, png_uint_16p *hist)); #endif #ifdef PNG_hIST_SUPPORTED -PNG_EXPORT(142, void, png_set_hIST, (png_structp png_ptr, - png_infop info_ptr, png_const_uint_16p hist)); +PNG_EXPORT(142, void, png_set_hIST, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_uint_16p hist)); #endif -PNG_EXPORT(143, png_uint_32, png_get_IHDR, - (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)); +PNG_EXPORT(143, png_uint_32, png_get_IHDR, (png_const_structrp png_ptr, + png_const_inforp 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)); -PNG_EXPORT(144, void, png_set_IHDR, - (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)); +PNG_EXPORT(144, void, png_set_IHDR, (png_const_structrp png_ptr, + png_inforp 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)); #ifdef PNG_oFFs_SUPPORTED -PNG_EXPORT(145, png_uint_32, png_get_oFFs, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)); +PNG_EXPORT(145, png_uint_32, png_get_oFFs, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_int_32 *offset_x, png_int_32 *offset_y, + int *unit_type)); #endif #ifdef PNG_oFFs_SUPPORTED -PNG_EXPORT(146, void, png_set_oFFs, - (png_structp png_ptr, png_infop info_ptr, - png_int_32 offset_x, png_int_32 offset_y, int unit_type)); +PNG_EXPORT(146, void, png_set_oFFs, (png_const_structrp png_ptr, + png_inforp info_ptr, png_int_32 offset_x, png_int_32 offset_y, + int unit_type)); #endif #ifdef PNG_pCAL_SUPPORTED -PNG_EXPORT(147, png_uint_32, png_get_pCAL, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, - int *nparams, - png_charp *units, png_charpp *params)); +PNG_EXPORT(147, png_uint_32, png_get_pCAL, (png_const_structrp png_ptr, + png_inforp info_ptr, png_charp *purpose, png_int_32 *X0, + png_int_32 *X1, int *type, int *nparams, png_charp *units, + png_charpp *params)); #endif #ifdef PNG_pCAL_SUPPORTED -PNG_EXPORT(148, void, png_set_pCAL, (png_structp png_ptr, - png_infop info_ptr, - png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, - int nparams, png_const_charp units, png_charpp params)); +PNG_EXPORT(148, void, png_set_pCAL, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_charp purpose, png_int_32 X0, png_int_32 X1, + int type, int nparams, png_const_charp units, png_charpp params)); #endif #ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(149, png_uint_32, png_get_pHYs, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); +PNG_EXPORT(149, png_uint_32, png_get_pHYs, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, + int *unit_type)); #endif #ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(150, void, png_set_pHYs, - (png_structp png_ptr, png_infop info_ptr, - png_uint_32 res_x, png_uint_32 res_y, int unit_type)); +PNG_EXPORT(150, void, png_set_pHYs, (png_const_structrp png_ptr, + png_inforp info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type)); #endif -PNG_EXPORT(151, png_uint_32, png_get_PLTE, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_colorp *palette, int *num_palette)); +PNG_EXPORT(151, png_uint_32, png_get_PLTE, (png_const_structrp png_ptr, + png_inforp info_ptr, png_colorp *palette, int *num_palette)); -PNG_EXPORT(152, void, png_set_PLTE, - (png_structp png_ptr, png_infop info_ptr, - png_const_colorp palette, int num_palette)); +PNG_EXPORT(152, void, png_set_PLTE, (png_structrp png_ptr, + png_inforp info_ptr, png_const_colorp palette, int num_palette)); #ifdef PNG_sBIT_SUPPORTED -PNG_EXPORT(153, png_uint_32, png_get_sBIT, - (png_const_structp png_ptr, png_infop info_ptr, - png_color_8p *sig_bit)); +PNG_EXPORT(153, png_uint_32, png_get_sBIT, (png_const_structrp png_ptr, + png_inforp info_ptr, png_color_8p *sig_bit)); #endif #ifdef PNG_sBIT_SUPPORTED -PNG_EXPORT(154, void, png_set_sBIT, - (png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit)); +PNG_EXPORT(154, void, png_set_sBIT, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_color_8p sig_bit)); #endif #ifdef PNG_sRGB_SUPPORTED -PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structp png_ptr, - png_const_infop info_ptr, int *file_srgb_intent)); +PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structrp png_ptr, + png_const_inforp info_ptr, int *file_srgb_intent)); #endif #ifdef PNG_sRGB_SUPPORTED -PNG_EXPORT(156, void, png_set_sRGB, - (png_structp png_ptr, png_infop info_ptr, int srgb_intent)); -PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_structp png_ptr, - png_infop info_ptr, int srgb_intent)); +PNG_EXPORT(156, void, png_set_sRGB, (png_const_structrp png_ptr, + png_inforp info_ptr, int srgb_intent)); +PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_const_structrp png_ptr, + png_inforp info_ptr, int srgb_intent)); #endif #ifdef PNG_iCCP_SUPPORTED -PNG_EXPORT(158, png_uint_32, png_get_iCCP, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_charpp name, int *compression_type, png_bytepp profile, - png_uint_32 *proflen)); +PNG_EXPORT(158, png_uint_32, png_get_iCCP, (png_const_structrp png_ptr, + png_inforp info_ptr, png_charpp name, int *compression_type, + png_bytepp profile, png_uint_32 *proflen)); #endif #ifdef PNG_iCCP_SUPPORTED -PNG_EXPORT(159, void, png_set_iCCP, - (png_structp png_ptr, png_infop info_ptr, - png_const_charp name, int compression_type, png_const_bytep profile, - png_uint_32 proflen)); +PNG_EXPORT(159, void, png_set_iCCP, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_charp name, int compression_type, + png_const_bytep profile, png_uint_32 proflen)); #endif #ifdef PNG_sPLT_SUPPORTED -PNG_EXPORT(160, png_uint_32, png_get_sPLT, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_sPLT_tpp entries)); +PNG_EXPORT(160, int, png_get_sPLT, (png_const_structrp png_ptr, + png_inforp info_ptr, png_sPLT_tpp entries)); #endif #ifdef PNG_sPLT_SUPPORTED -PNG_EXPORT(161, void, png_set_sPLT, - (png_structp png_ptr, png_infop info_ptr, - png_const_sPLT_tp entries, int nentries)); +PNG_EXPORT(161, void, png_set_sPLT, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_sPLT_tp entries, int nentries)); #endif #ifdef PNG_TEXT_SUPPORTED /* png_get_text also returns the number of text chunks in *num_text */ -PNG_EXPORT(162, png_uint_32, png_get_text, - (png_const_structp png_ptr, png_const_infop info_ptr, - png_textp *text_ptr, int *num_text)); +PNG_EXPORT(162, int, png_get_text, (png_const_structrp png_ptr, + png_inforp info_ptr, png_textp *text_ptr, int *num_text)); #endif /* Note while png_set_text() will accept a structure whose text, @@ -2277,122 +2284,220 @@ PNG_EXPORT(162, png_uint_32, png_get_text, */ #ifdef PNG_TEXT_SUPPORTED -PNG_EXPORT(163, void, png_set_text, - (png_structp png_ptr, png_infop info_ptr, - png_const_textp text_ptr, int num_text)); +PNG_EXPORT(163, void, png_set_text, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_textp text_ptr, int num_text)); #endif #ifdef PNG_tIME_SUPPORTED -PNG_EXPORT(164, png_uint_32, png_get_tIME, - (png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time)); +PNG_EXPORT(164, png_uint_32, png_get_tIME, (png_const_structrp png_ptr, + png_inforp info_ptr, png_timep *mod_time)); #endif #ifdef PNG_tIME_SUPPORTED -PNG_EXPORT(165, void, png_set_tIME, - (png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)); +PNG_EXPORT(165, void, png_set_tIME, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_timep mod_time)); #endif #ifdef PNG_tRNS_SUPPORTED -PNG_EXPORT(166, png_uint_32, png_get_tRNS, - (png_const_structp png_ptr, png_infop info_ptr, - png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)); +PNG_EXPORT(166, png_uint_32, png_get_tRNS, (png_const_structrp png_ptr, + png_inforp info_ptr, png_bytep *trans_alpha, int *num_trans, + png_color_16p *trans_color)); #endif #ifdef PNG_tRNS_SUPPORTED -PNG_EXPORT(167, void, png_set_tRNS, - (png_structp png_ptr, png_infop info_ptr, - png_const_bytep trans_alpha, int num_trans, +PNG_EXPORT(167, void, png_set_tRNS, (png_structrp png_ptr, + png_inforp info_ptr, png_const_bytep trans_alpha, int num_trans, png_const_color_16p trans_color)); #endif #ifdef PNG_sCAL_SUPPORTED -PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, - (png_const_structp png_ptr, png_const_infop info_ptr, - int *unit, double *width, double *height)); -#ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED +PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, (png_const_structrp png_ptr, + png_const_inforp info_ptr, int *unit, double *width, double *height)) +#if defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) || \ + defined(PNG_FLOATING_POINT_SUPPORTED) /* NOTE: this API is currently implemented using floating point arithmetic, * consequently it can only be used on systems with floating point support. * In any case the range of values supported by png_fixed_point is small and it * is highly recommended that png_get_sCAL_s be used instead. */ PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed, - (png_structp png_ptr, png_const_infop info_ptr, int *unit, - png_fixed_point *width, - png_fixed_point *height)); + (png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, + png_fixed_point *width, png_fixed_point *height)) #endif PNG_EXPORT(169, png_uint_32, png_get_sCAL_s, - (png_const_structp png_ptr, png_const_infop info_ptr, - int *unit, png_charpp swidth, png_charpp sheight)); - -PNG_FP_EXPORT(170, void, png_set_sCAL, - (png_structp png_ptr, png_infop info_ptr, - int unit, double width, double height)); -PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr, - png_infop info_ptr, int unit, png_fixed_point width, - png_fixed_point height)); -PNG_EXPORT(171, void, png_set_sCAL_s, - (png_structp png_ptr, png_infop info_ptr, - int unit, png_const_charp swidth, png_const_charp sheight)); -#endif /* PNG_sCAL_SUPPORTED */ - -#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. Because this turns off the default handling for chunks - that would otherwise be recognized the behavior of libpng transformations may - well become incorrect! - keep = 0: PNG_HANDLE_CHUNK_AS_DEFAULT: follow default behavior - = 1: PNG_HANDLE_CHUNK_NEVER: do not keep - = 2: PNG_HANDLE_CHUNK_IF_SAFE: keep only if safe-to-copy - = 3: PNG_HANDLE_CHUNK_ALWAYS: keep even if unsafe-to-copy -*/ -PNG_EXPORT(172, void, png_set_keep_unknown_chunks, - (png_structp png_ptr, int keep, - png_const_bytep chunk_list, int num_chunks)); - -/* The handling code is returned; the result is therefore true (non-zero) if - * special handling is required, false for the default handling. - */ -PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr, + (png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, + png_charpp swidth, png_charpp sheight)); + +PNG_FP_EXPORT(170, void, png_set_sCAL, (png_const_structrp png_ptr, + png_inforp info_ptr, int unit, double width, double height)) +PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_const_structrp png_ptr, + png_inforp info_ptr, int unit, png_fixed_point width, + png_fixed_point height)) +PNG_EXPORT(171, void, png_set_sCAL_s, (png_const_structrp png_ptr, + png_inforp info_ptr, int unit, + png_const_charp swidth, png_const_charp sheight)); +#endif /* sCAL */ + +#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED +/* Provide the default handling for all unknown chunks or, optionally, for + * specific unknown chunks. + * + * NOTE: prior to 1.6.0 the handling specified for particular chunks on read was + * ignored and the default was used, the per-chunk setting only had an effect on + * write. If you wish to have chunk-specific handling on read in code that must + * work on earlier versions you must use a user chunk callback to specify the + * desired handling (keep or discard.) + * + * The 'keep' parameter is a PNG_HANDLE_CHUNK_ value as listed below. The + * parameter is interpreted as follows: + * + * READ: + * PNG_HANDLE_CHUNK_AS_DEFAULT: + * Known chunks: do normal libpng processing, do not keep the chunk (but + * see the comments below about PNG_HANDLE_AS_UNKNOWN_SUPPORTED) + * Unknown chunks: for a specific chunk use the global default, when used + * as the default discard the chunk data. + * PNG_HANDLE_CHUNK_NEVER: + * Discard the chunk data. + * PNG_HANDLE_CHUNK_IF_SAFE: + * Keep the chunk data if the chunk is not critical else raise a chunk + * error. + * PNG_HANDLE_CHUNK_ALWAYS: + * Keep the chunk data. + * + * If the chunk data is saved it can be retrieved using png_get_unknown_chunks, + * below. Notice that specifying "AS_DEFAULT" as a global default is equivalent + * to specifying "NEVER", however when "AS_DEFAULT" is used for specific chunks + * it simply resets the behavior to the libpng default. + * + * INTERACTION WTIH USER CHUNK CALLBACKS: + * The per-chunk handling is always used when there is a png_user_chunk_ptr + * callback and the callback returns 0; the chunk is then always stored *unless* + * it is critical and the per-chunk setting is other than ALWAYS. Notice that + * the global default is *not* used in this case. (In effect the per-chunk + * value is incremented to at least IF_SAFE.) + * + * IMPORTANT NOTE: this behavior will change in libpng 1.7 - the global and + * per-chunk defaults will be honored. If you want to preserve the current + * behavior when your callback returns 0 you must set PNG_HANDLE_CHUNK_IF_SAFE + * as the default - if you don't do this libpng 1.6 will issue a warning. + * + * If you want unhandled unknown chunks to be discarded in libpng 1.6 and + * earlier simply return '1' (handled). + * + * PNG_HANDLE_AS_UNKNOWN_SUPPORTED: + * If this is *not* set known chunks will always be handled by libpng and + * will never be stored in the unknown chunk list. Known chunks listed to + * png_set_keep_unknown_chunks will have no effect. If it is set then known + * chunks listed with a keep other than AS_DEFAULT will *never* be processed + * by libpng, in addition critical chunks must either be processed by the + * callback or saved. + * + * The IHDR and IEND chunks must not be listed. Because this turns off the + * default handling for chunks that would otherwise be recognized the + * behavior of libpng transformations may well become incorrect! + * + * WRITE: + * When writing chunks the options only apply to the chunks specified by + * png_set_unknown_chunks (below), libpng will *always* write known chunks + * required by png_set_ calls and will always write the core critical chunks + * (as required for PLTE). + * + * Each chunk in the png_set_unknown_chunks list is looked up in the + * png_set_keep_unknown_chunks list to find the keep setting, this is then + * interpreted as follows: + * + * PNG_HANDLE_CHUNK_AS_DEFAULT: + * Write safe-to-copy chunks and write other chunks if the global + * default is set to _ALWAYS, otherwise don't write this chunk. + * PNG_HANDLE_CHUNK_NEVER: + * Do not write the chunk. + * PNG_HANDLE_CHUNK_IF_SAFE: + * Write the chunk if it is safe-to-copy, otherwise do not write it. + * PNG_HANDLE_CHUNK_ALWAYS: + * Write the chunk. + * + * Note that the default behavior is effectively the opposite of the read case - + * in read unknown chunks are not stored by default, in write they are written + * by default. Also the behavior of PNG_HANDLE_CHUNK_IF_SAFE is very different + * - on write the safe-to-copy bit is checked, on read the critical bit is + * checked and on read if the chunk is critical an error will be raised. + * + * num_chunks: + * =========== + * If num_chunks is positive, then the "keep" parameter specifies the manner + * for handling only those chunks appearing in the chunk_list array, + * otherwise the chunk list array is ignored. + * + * If num_chunks is 0 the "keep" parameter specifies the default behavior for + * unknown chunks, as described above. + * + * If num_chunks is negative, then the "keep" parameter specifies the manner + * for handling all unknown chunks plus all chunks recognized by libpng + * except for the IHDR, PLTE, tRNS, IDAT, and IEND chunks (which continue to + * be processed by libpng. + */ +PNG_EXPORT(172, void, png_set_keep_unknown_chunks, (png_structrp png_ptr, + int keep, png_const_bytep chunk_list, int num_chunks)); + +/* The "keep" PNG_HANDLE_CHUNK_ parameter for the specified chunk is returned; + * the result is therefore true (non-zero) if special handling is required, + * false for the default handling. + */ +PNG_EXPORT(173, int, png_handle_as_unknown, (png_const_structrp png_ptr, png_const_bytep chunk_name)); #endif -#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED -PNG_EXPORT(174, void, png_set_unknown_chunks, (png_structp png_ptr, - png_infop info_ptr, png_const_unknown_chunkp unknowns, + +#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED +PNG_EXPORT(174, void, png_set_unknown_chunks, (png_const_structrp png_ptr, + png_inforp info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)); + /* NOTE: prior to 1.6.0 this routine set the 'location' field of the added + * unknowns to the location currently stored in the png_struct. This is + * invariably the wrong value on write. To fix this call the following API + * for each chunk in the list with the correct location. If you know your + * code won't be compiled on earlier versions you can rely on + * png_set_unknown_chunks(write-ptr, png_get_unknown_chunks(read-ptr)) doing + * the correct thing. + */ + PNG_EXPORT(175, void, png_set_unknown_chunk_location, - (png_structp png_ptr, png_infop info_ptr, int chunk, int location)); -PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structp png_ptr, - png_const_infop info_ptr, png_unknown_chunkpp entries)); + (png_const_structrp png_ptr, png_inforp info_ptr, int chunk, int location)); + +PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structrp png_ptr, + png_inforp info_ptr, png_unknown_chunkpp entries)); #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); */ -PNG_EXPORT(177, void, png_set_invalid, - (png_structp png_ptr, png_infop info_ptr, int mask)); +PNG_EXPORT(177, void, png_set_invalid, (png_const_structrp png_ptr, + png_inforp info_ptr, int mask)); #ifdef PNG_INFO_IMAGE_SUPPORTED /* The "params" pointer is currently not used and is for future expansion. */ -PNG_EXPORT(178, void, png_read_png, (png_structp png_ptr, png_infop info_ptr, +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +PNG_EXPORT(178, void, png_read_png, (png_structrp png_ptr, png_inforp info_ptr, int transforms, png_voidp params)); -PNG_EXPORT(179, void, png_write_png, (png_structp png_ptr, png_infop info_ptr, +#endif +#ifdef PNG_WRITE_SUPPORTED +PNG_EXPORT(179, void, png_write_png, (png_structrp png_ptr, png_inforp info_ptr, int transforms, png_voidp params)); #endif +#endif PNG_EXPORT(180, png_const_charp, png_get_copyright, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); PNG_EXPORT(181, png_const_charp, png_get_header_ver, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); PNG_EXPORT(182, png_const_charp, png_get_header_version, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); PNG_EXPORT(183, png_const_charp, png_get_libpng_ver, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); #ifdef PNG_MNG_FEATURES_SUPPORTED -PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr, +PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structrp png_ptr, png_uint_32 mng_features_permitted)); #endif @@ -2401,75 +2506,77 @@ PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr, #define PNG_HANDLE_CHUNK_NEVER 1 #define PNG_HANDLE_CHUNK_IF_SAFE 2 #define PNG_HANDLE_CHUNK_ALWAYS 3 +#define PNG_HANDLE_CHUNK_LAST 4 /* 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(185, void, png_set_strip_error_numbers, - (png_structp png_ptr, +PNG_EXPORT(185, void, png_set_strip_error_numbers, (png_structrp png_ptr, png_uint_32 strip_mode)); #endif /* Added in libpng-1.2.6 */ #ifdef PNG_SET_USER_LIMITS_SUPPORTED -PNG_EXPORT(186, void, png_set_user_limits, (png_structp png_ptr, +PNG_EXPORT(186, void, png_set_user_limits, (png_structrp png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max)); PNG_EXPORT(187, png_uint_32, png_get_user_width_max, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); PNG_EXPORT(188, png_uint_32, png_get_user_height_max, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); /* Added in libpng-1.4.0 */ -PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structp png_ptr, +PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structrp png_ptr, png_uint_32 user_chunk_cache_max)); PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); /* Added in libpng-1.4.1 */ -PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structp png_ptr, +PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structrp png_ptr, png_alloc_size_t user_chunk_cache_max)); PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); #endif #if defined(PNG_INCH_CONVERSIONS_SUPPORTED) PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)); PNG_FP_EXPORT(196, float, png_get_x_offset_inches, - (png_const_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)) #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed, - (png_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)) #endif -PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr, - png_const_infop info_ptr)); +PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structrp png_ptr, + png_const_inforp info_ptr)) #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed, - (png_structp png_ptr, png_const_infop info_ptr)); + (png_const_structrp png_ptr, png_const_inforp info_ptr)) #endif # ifdef PNG_pHYs_SUPPORTED -PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structp png_ptr, - png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, +PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structrp png_ptr, + png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); -# endif /* PNG_pHYs_SUPPORTED */ -#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ +# endif /* pHYs */ +#endif /* INCH_CONVERSIONS */ /* Added in libpng-1.4.0 */ #ifdef PNG_IO_STATE_SUPPORTED -PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_structp png_ptr)); +PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_const_structrp png_ptr)); + +/* Removed from libpng 1.6; use png_get_io_chunk_type. */ +PNG_REMOVED(200, png_const_bytep, png_get_io_chunk_name, (png_structrp png_ptr), + PNG_DEPRECATED) -PNG_EXPORTA(200, png_const_bytep, png_get_io_chunk_name, - (png_structp png_ptr), PNG_DEPRECATED); PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, - (png_const_structp png_ptr)); + (png_const_structrp png_ptr)); /* The flags returned by png_get_io_state() are the following: */ # define PNG_IO_NONE 0x0000 /* no I/O at this moment */ @@ -2481,7 +2588,7 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, # 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 */ +#endif /* IO_STATE */ /* Interlace support. The following macros are always defined so that if * libpng interlace handling is turned off the macros may be used to handle @@ -2525,10 +2632,10 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, * necessary to find the row in the output image given a row in an interlaced * image, so two more macros: */ -#define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ - (((yIn)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass)) -#define PNG_COL_FROM_PASS_COL(xIn, pass) \ - (((xIn)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass)) +#define PNG_ROW_FROM_PASS_ROW(y_in, pass) \ + (((y_in)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass)) +#define PNG_COL_FROM_PASS_COL(x_in, pass) \ + (((x_in)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass)) /* Two macros which return a boolean (0 or 1) saying whether the given row * or column is in a particular pass. These use a common utility macro that @@ -2565,27 +2672,29 @@ PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, * (png_uint_16)(alpha) \ + (png_uint_16)(bg)*(png_uint_16)(255 \ - (png_uint_16)(alpha)) + 128); \ - (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } + (composite) = (png_byte)(((temp + (temp >> 8)) >> 8) & 0xff); } # 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)*(65535 \ - (png_uint_32)(alpha)) + 32768); \ - (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } + (composite) = (png_uint_16)(0xffff & ((temp + (temp >> 16)) >> 16)); } #else /* Standard method using integer division */ -# define png_composite(composite, fg, alpha, bg) \ - (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ - (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ - 127) / 255) +# define png_composite(composite, fg, alpha, bg) \ + (composite) = \ + (png_byte)(0xff & (((png_uint_16)(fg) * (png_uint_16)(alpha) + \ + (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ + 127) / 255)) # define png_composite_16(composite, fg, alpha, bg) \ - (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ - (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \ - 32767) / 65535) -#endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ + (composite) = \ + (png_uint_16)(0xffff & (((png_uint_32)(fg) * (png_uint_32)(alpha) + \ + (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \ + 32767) / 65535)) +#endif /* READ_COMPOSITE_NODIV */ #ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf)); @@ -2593,7 +2702,7 @@ PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf)); PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf)); #endif -PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_structp png_ptr, +PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_const_structrp png_ptr, png_const_bytep buf)); /* No png_get_int_16 -- may be added if there's a real need for it. */ @@ -2619,7 +2728,7 @@ PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i)); * The png_get_int_32() routine assumes we are using two's complement * format for negative values, which is almost certainly true. */ -# define png_get_uint_32(buf) \ +# define PNG_get_uint_32(buf) \ (((png_uint_32)(*(buf)) << 24) + \ ((png_uint_32)(*((buf) + 1)) << 16) + \ ((png_uint_32)(*((buf) + 2)) << 8) + \ @@ -2628,33 +2737,550 @@ PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i)); /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the * function) incorrectly returned a value of type png_uint_32. */ -# define png_get_uint_16(buf) \ +# define PNG_get_uint_16(buf) \ ((png_uint_16) \ (((unsigned int)(*(buf)) << 8) + \ ((unsigned int)(*((buf) + 1))))) -# define png_get_int_32(buf) \ +# define PNG_get_int_32(buf) \ ((png_int_32)((*(buf) & 0x80) \ ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \ : (png_int_32)png_get_uint_32(buf))) + + /* If PNG_PREFIX is defined the same thing as below happens in pnglibconf.h, + * but defining a macro name prefixed with PNG_PREFIX. + */ +# ifndef PNG_PREFIX +# define png_get_uint_32(buf) PNG_get_uint_32(buf) +# define png_get_uint_16(buf) PNG_get_uint_16(buf) +# define png_get_int_32(buf) PNG_get_int_32(buf) +# endif +#else +# ifdef PNG_PREFIX + /* No macros; revert to the (redefined) function */ +# define PNG_get_uint_32 (png_get_uint_32) +# define PNG_get_uint_16 (png_get_uint_16) +# define PNG_get_int_32 (png_get_int_32) +# endif #endif -#if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \ - defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED) -PNG_EXPORT(234, void, png_set_check_for_invalid_index, (png_structp png_ptr, - int allowed)); +#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) || \ + defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) +/******************************************************************************* + * SIMPLIFIED API + ******************************************************************************* + * + * Please read the documentation in libpng-manual.txt (TODO: write said + * documentation) if you don't understand what follows. + * + * The simplified API hides the details of both libpng and the PNG file format + * itself. It allows PNG files to be read into a very limited number of + * in-memory bitmap formats or to be written from the same formats. If these + * formats do not accomodate your needs then you can, and should, use the more + * sophisticated APIs above - these support a wide variety of in-memory formats + * and a wide variety of sophisticated transformations to those formats as well + * as a wide variety of APIs to manipulate ancillary information. + * + * To read a PNG file using the simplified API: + * + * 1) Declare a 'png_image' structure (see below) on the stack and set the + * version field to PNG_IMAGE_VERSION. + * 2) Call the appropriate png_image_begin_read... function. + * 3) Set the png_image 'format' member to the required sample format. + * 4) Allocate a buffer for the image and, if required, the color-map. + * 5) Call png_image_finish_read to read the image and, if required, the + * color-map into your buffers. + * + * There are no restrictions on the format of the PNG input itself; all valid + * color types, bit depths, and interlace methods are acceptable, and the + * input image is transformed as necessary to the requested in-memory format + * during the png_image_finish_read() step. The only caveat is that if you + * request a color-mapped image from a PNG that is full-color or makes + * complex use of an alpha channel the transformation is extremely lossy and the + * result may look terrible. + * + * To write a PNG file using the simplified API: + * + * 1) Declare a 'png_image' structure on the stack and memset() it to all zero. + * 2) Initialize the members of the structure that describe the image, setting + * the 'format' member to the format of the image samples. + * 3) Call the appropriate png_image_write... function with a pointer to the + * image and, if necessary, the color-map to write the PNG data. + * + * png_image is a structure that describes the in-memory format of an image + * when it is being read or defines the in-memory format of an image that you + * need to write: + */ +#define PNG_IMAGE_VERSION 1 + +typedef struct png_control *png_controlp; +typedef struct +{ + png_controlp opaque; /* Initialize to NULL, free with png_image_free */ + png_uint_32 version; /* Set to PNG_IMAGE_VERSION */ + png_uint_32 width; /* Image width in pixels (columns) */ + png_uint_32 height; /* Image height in pixels (rows) */ + png_uint_32 format; /* Image format as defined below */ + png_uint_32 flags; /* A bit mask containing informational flags */ + png_uint_32 colormap_entries; + /* Number of entries in the color-map */ + + /* In the event of an error or warning the following field will be set to a + * non-zero value and the 'message' field will contain a '\0' terminated + * string with the libpng error or warning message. If both warnings and + * an error were encountered, only the error is recorded. If there + * are multiple warnings, only the first one is recorded. + * + * The upper 30 bits of this value are reserved, the low two bits contain + * a value as follows: + */ +# define PNG_IMAGE_WARNING 1 +# define PNG_IMAGE_ERROR 2 + /* + * The result is a two-bit code such that a value more than 1 indicates + * a failure in the API just called: + * + * 0 - no warning or error + * 1 - warning + * 2 - error + * 3 - error preceded by warning + */ +# define PNG_IMAGE_FAILED(png_cntrl) ((((png_cntrl).warning_or_error)&0x03)>1) + + png_uint_32 warning_or_error; + + char message[64]; +} png_image, *png_imagep; + +/* The samples of the image have one to four channels whose components have + * original values in the range 0 to 1.0: + * + * 1: A single gray or luminance channel (G). + * 2: A gray/luminance channel and an alpha channel (GA). + * 3: Three red, green, blue color channels (RGB). + * 4: Three color channels and an alpha channel (RGBA). + * + * The components are encoded in one of two ways: + * + * a) As a small integer, value 0..255, contained in a single byte. For the + * alpha channel the original value is simply value/255. For the color or + * luminance channels the value is encoded according to the sRGB specification + * and matches the 8-bit format expected by typical display devices. + * + * The color/gray channels are not scaled (pre-multiplied) by the alpha + * channel and are suitable for passing to color management software. + * + * b) As a value in the range 0..65535, contained in a 2-byte integer. All + * channels can be converted to the original value by dividing by 65535; all + * channels are linear. Color channels use the RGB encoding (RGB end-points) of + * the sRGB specification. This encoding is identified by the + * PNG_FORMAT_FLAG_LINEAR flag below. + * + * When the simplified API needs to convert between sRGB and linear colorspaces, + * the actual sRGB transfer curve defined in the sRGB specification (see the + * article at http://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2 + * approximation used elsewhere in libpng. + * + * When an alpha channel is present it is expected to denote pixel coverage + * of the color or luminance channels and is returned as an associated alpha + * channel: the color/gray channels are scaled (pre-multiplied) by the alpha + * value. + * + * The samples are either contained directly in the image data, between 1 and 8 + * bytes per pixel according to the encoding, or are held in a color-map indexed + * by bytes in the image data. In the case of a color-map the color-map entries + * are individual samples, encoded as above, and the image data has one byte per + * pixel to select the relevant sample from the color-map. + */ + +/* PNG_FORMAT_* + * + * #defines to be used in png_image::format. Each #define identifies a + * particular layout of sample data and, if present, alpha values. There are + * separate defines for each of the two component encodings. + * + * A format is built up using single bit flag values. All combinations are + * valid. Formats can be built up from the flag values or you can use one of + * the predefined values below. When testing formats always use the FORMAT_FLAG + * macros to test for individual features - future versions of the library may + * add new flags. + * + * When reading or writing color-mapped images the format should be set to the + * format of the entries in the color-map then png_image_{read,write}_colormap + * called to read or write the color-map and set the format correctly for the + * image data. Do not set the PNG_FORMAT_FLAG_COLORMAP bit directly! + * + * NOTE: libpng can be built with particular features disabled, if you see + * compiler errors because the definition of one of the following flags has been + * compiled out it is because libpng does not have the required support. It is + * possible, however, for the libpng configuration to enable the format on just + * read or just write; in that case you may see an error at run time. You can + * guard against this by checking for the definition of the appropriate + * "_SUPPORTED" macro, one of: + * + * PNG_SIMPLIFIED_{READ,WRITE}_{BGR,AFIRST}_SUPPORTED + */ +#define PNG_FORMAT_FLAG_ALPHA 0x01U /* format with an alpha channel */ +#define PNG_FORMAT_FLAG_COLOR 0x02U /* color format: otherwise grayscale */ +#define PNG_FORMAT_FLAG_LINEAR 0x04U /* 2 byte channels else 1 byte */ +#define PNG_FORMAT_FLAG_COLORMAP 0x08U /* image data is color-mapped */ + +#ifdef PNG_FORMAT_BGR_SUPPORTED +# define PNG_FORMAT_FLAG_BGR 0x10U /* BGR colors, else order is RGB */ +#endif + +#ifdef PNG_FORMAT_AFIRST_SUPPORTED +# define PNG_FORMAT_FLAG_AFIRST 0x20U /* alpha channel comes first */ +#endif + +/* Commonly used formats have predefined macros. + * + * First the single byte (sRGB) formats: + */ +#define PNG_FORMAT_GRAY 0 +#define PNG_FORMAT_GA PNG_FORMAT_FLAG_ALPHA +#define PNG_FORMAT_AG (PNG_FORMAT_GA|PNG_FORMAT_FLAG_AFIRST) +#define PNG_FORMAT_RGB PNG_FORMAT_FLAG_COLOR +#define PNG_FORMAT_BGR (PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_BGR) +#define PNG_FORMAT_RGBA (PNG_FORMAT_RGB|PNG_FORMAT_FLAG_ALPHA) +#define PNG_FORMAT_ARGB (PNG_FORMAT_RGBA|PNG_FORMAT_FLAG_AFIRST) +#define PNG_FORMAT_BGRA (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_ALPHA) +#define PNG_FORMAT_ABGR (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_AFIRST) + +/* Then the linear 2-byte formats. When naming these "Y" is used to + * indicate a luminance (gray) channel. + */ +#define PNG_FORMAT_LINEAR_Y PNG_FORMAT_FLAG_LINEAR +#define PNG_FORMAT_LINEAR_Y_ALPHA (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_ALPHA) +#define PNG_FORMAT_LINEAR_RGB (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR) +#define PNG_FORMAT_LINEAR_RGB_ALPHA \ + (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA) + +/* With color-mapped formats the image data is one byte for each pixel, the byte + * is an index into the color-map which is formatted as above. To obtain a + * color-mapped format it is sufficient just to add the PNG_FOMAT_FLAG_COLORMAP + * to one of the above definitions, or you can use one of the definitions below. + */ +#define PNG_FORMAT_RGB_COLORMAP (PNG_FORMAT_RGB|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_BGR_COLORMAP (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_RGBA_COLORMAP (PNG_FORMAT_RGBA|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_ARGB_COLORMAP (PNG_FORMAT_ARGB|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_BGRA_COLORMAP (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_COLORMAP) +#define PNG_FORMAT_ABGR_COLORMAP (PNG_FORMAT_ABGR|PNG_FORMAT_FLAG_COLORMAP) + +/* PNG_IMAGE macros + * + * These are convenience macros to derive information from a png_image + * structure. The PNG_IMAGE_SAMPLE_ macros return values appropriate to the + * actual image sample values - either the entries in the color-map or the + * pixels in the image. The PNG_IMAGE_PIXEL_ macros return corresponding values + * for the pixels and will always return 1 for color-mapped formats. The + * remaining macros return information about the rows in the image and the + * complete image. + * + * NOTE: All the macros that take a png_image::format parameter are compile time + * constants if the format parameter is, itself, a constant. Therefore these + * macros can be used in array declarations and case labels where required. + * Similarly the macros are also pre-processor constants (sizeof is not used) so + * they can be used in #if tests. + * + * First the information about the samples. + */ +#define PNG_IMAGE_SAMPLE_CHANNELS(fmt)\ + (((fmt)&(PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA))+1) + /* Return the total number of channels in a given format: 1..4 */ + +#define PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt)\ + ((((fmt) & PNG_FORMAT_FLAG_LINEAR) >> 2)+1) + /* Return the size in bytes of a single component of a pixel or color-map + * entry (as appropriate) in the image: 1 or 2. + */ + +#define PNG_IMAGE_SAMPLE_SIZE(fmt)\ + (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt)) + /* This is the size of the sample data for one sample. If the image is + * color-mapped it is the size of one color-map entry (and image pixels are + * one byte in size), otherwise it is the size of one image pixel. + */ + +#define PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(fmt)\ + (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * 256) + /* The maximum size of the color-map required by the format expressed in a + * count of components. This can be used to compile-time allocate a + * color-map: + * + * png_uint_16 colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(linear_fmt)]; + * + * png_byte colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(sRGB_fmt)]; + * + * Alternatively use the PNG_IMAGE_COLORMAP_SIZE macro below to use the + * information from one of the png_image_begin_read_ APIs and dynamically + * allocate the required memory. + */ + +/* Corresponding information about the pixels */ +#define PNG_IMAGE_PIXEL_(test,fmt)\ + (((fmt)&PNG_FORMAT_FLAG_COLORMAP)?1:test(fmt)) + +#define PNG_IMAGE_PIXEL_CHANNELS(fmt)\ + PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_CHANNELS,fmt) + /* The number of separate channels (components) in a pixel; 1 for a + * color-mapped image. + */ + +#define PNG_IMAGE_PIXEL_COMPONENT_SIZE(fmt)\ + PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_COMPONENT_SIZE,fmt) + /* The size, in bytes, of each component in a pixel; 1 for a color-mapped + * image. + */ + +#define PNG_IMAGE_PIXEL_SIZE(fmt) PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_SIZE,fmt) + /* The size, in bytes, of a complete pixel; 1 for a color-mapped image. */ + +/* Information about the whole row, or whole image */ +#define PNG_IMAGE_ROW_STRIDE(image)\ + (PNG_IMAGE_PIXEL_CHANNELS((image).format) * (image).width) + /* Return the total number of components in a single row of the image; this + * is the minimum 'row stride', the minimum count of components between each + * row. For a color-mapped image this is the minimum number of bytes in a + * row. + */ + +#define PNG_IMAGE_BUFFER_SIZE(image, row_stride)\ + (PNG_IMAGE_PIXEL_COMPONENT_SIZE((image).format)*(image).height*(row_stride)) + /* Return the size, in bytes, of an image buffer given a png_image and a row + * stride - the number of components to leave space for in each row. + */ + +#define PNG_IMAGE_SIZE(image)\ + PNG_IMAGE_BUFFER_SIZE(image, PNG_IMAGE_ROW_STRIDE(image)) + /* Return the size, in bytes, of the image in memory given just a png_image; + * the row stride is the minimum stride required for the image. + */ + +#define PNG_IMAGE_COLORMAP_SIZE(image)\ + (PNG_IMAGE_SAMPLE_SIZE((image).format) * (image).colormap_entries) + /* Return the size, in bytes, of the color-map of this image. If the image + * format is not a color-map format this will return a size sufficient for + * 256 entries in the given format; check PNG_FORMAT_FLAG_COLORMAP if + * you don't want to allocate a color-map in this case. + */ + +/* PNG_IMAGE_FLAG_* + * + * Flags containing additional information about the image are held in the + * 'flags' field of png_image. + */ +#define PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB 0x01 + /* This indicates the the RGB values of the in-memory bitmap do not + * correspond to the red, green and blue end-points defined by sRGB. + */ + +#define PNG_IMAGE_FLAG_FAST 0x02 + /* On write emphasise speed over compression; the resultant PNG file will be + * larger but will be produced significantly faster, particular for large + * images. Do not use this option for images which will be distributed, only + * used it when producing intermediate files that will be read back in + * repeatedly. For a typical 24-bit image the option will double the read + * speed at the cost of increasing the image size by 25%, however for many + * more compressible images the PNG file can be 10 times larger with only a + * slight speed gain. + */ + +#define PNG_IMAGE_FLAG_16BIT_sRGB 0x04 + /* On read if the image is a 16-bit per component image and there is no gAMA + * or sRGB chunk assume that the components are sRGB encoded. Notice that + * images output by the simplified API always have gamma information; setting + * this flag only affects the interpretation of 16-bit images from an + * external source. It is recommended that the application expose this flag + * to the user; the user can normally easily recognize the difference between + * linear and sRGB encoding. This flag has no effect on write - the data + * passed to the write APIs must have the correct encoding (as defined + * above.) + * + * If the flag is not set (the default) input 16-bit per component data is + * assumed to be linear. + * + * NOTE: the flag can only be set after the png_image_begin_read_ call, + * because that call initializes the 'flags' field. + */ + +#ifdef PNG_SIMPLIFIED_READ_SUPPORTED +/* READ APIs + * --------- + * + * The png_image passed to the read APIs must have been initialized by setting + * the png_controlp field 'opaque' to NULL (or, safer, memset the whole thing.) + */ +#ifdef PNG_STDIO_SUPPORTED +PNG_EXPORT(234, int, png_image_begin_read_from_file, (png_imagep image, + const char *file_name)); + /* The named file is opened for read and the image header is filled in + * from the PNG header in the file. + */ + +PNG_EXPORT(235, int, png_image_begin_read_from_stdio, (png_imagep image, + FILE* file)); + /* The PNG header is read from the stdio FILE object. */ +#endif /* STDIO */ + +PNG_EXPORT(236, int, png_image_begin_read_from_memory, (png_imagep image, + png_const_voidp memory, png_size_t size)); + /* The PNG header is read from the given memory buffer. */ + +PNG_EXPORT(237, int, png_image_finish_read, (png_imagep image, + png_const_colorp background, void *buffer, png_int_32 row_stride, + void *colormap)); + /* Finish reading the image into the supplied buffer and clean up the + * png_image structure. + * + * row_stride is the step, in byte or 2-byte units as appropriate, + * between adjacent rows. A positive stride indicates that the top-most row + * is first in the buffer - the normal top-down arrangement. A negative + * stride indicates that the bottom-most row is first in the buffer. + * + * background need only be supplied if an alpha channel must be removed from + * a png_byte format and the removal is to be done by compositing on a solid + * color; otherwise it may be NULL and any composition will be done directly + * onto the buffer. The value is an sRGB color to use for the background, + * for grayscale output the green channel is used. + * + * background must be supplied when an alpha channel must be removed from a + * single byte color-mapped output format, in other words if: + * + * 1) The original format from png_image_begin_read_from_* had + * PNG_FORMAT_FLAG_ALPHA set. + * 2) The format set by the application does not. + * 3) The format set by the application has PNG_FORMAT_FLAG_COLORMAP set and + * PNG_FORMAT_FLAG_LINEAR *not* set. + * + * For linear output removing the alpha channel is always done by compositing + * on black and background is ignored. + * + * colormap must be supplied when PNG_FORMAT_FLAG_COLORMAP is set. It must + * be at least the size (in bytes) returned by PNG_IMAGE_COLORMAP_SIZE. + * image->colormap_entries will be updated to the actual number of entries + * written to the colormap; this may be less than the original value. + */ + +PNG_EXPORT(238, void, png_image_free, (png_imagep image)); + /* Free any data allocated by libpng in image->opaque, setting the pointer to + * NULL. May be called at any time after the structure is initialized. + */ +#endif /* SIMPLIFIED_READ */ + +#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED +#ifdef PNG_STDIO_SUPPORTED +/* WRITE APIS + * ---------- + * For write you must initialize a png_image structure to describe the image to + * be written. To do this use memset to set the whole structure to 0 then + * initialize fields describing your image. + * + * version: must be set to PNG_IMAGE_VERSION + * opaque: must be initialized to NULL + * width: image width in pixels + * height: image height in rows + * format: the format of the data (image and color-map) you wish to write + * flags: set to 0 unless one of the defined flags applies; set + * PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB for color format images where the RGB + * values do not correspond to the colors in sRGB. + * colormap_entries: set to the number of entries in the color-map (0 to 256) + */ +PNG_EXPORT(239, int, png_image_write_to_file, (png_imagep image, + const char *file, int convert_to_8bit, const void *buffer, + png_int_32 row_stride, const void *colormap)); + /* Write the image to the named file. */ + +PNG_EXPORT(240, int, png_image_write_to_stdio, (png_imagep image, FILE *file, + int convert_to_8_bit, const void *buffer, png_int_32 row_stride, + const void *colormap)); + /* Write the image to the given (FILE*). */ + +/* With both write APIs if image is in one of the linear formats with 16-bit + * data then setting convert_to_8_bit will cause the output to be an 8-bit PNG + * gamma encoded according to the sRGB specification, otherwise a 16-bit linear + * encoded PNG file is written. + * + * With color-mapped data formats the colormap parameter point to a color-map + * with at least image->colormap_entries encoded in the specified format. If + * the format is linear the written PNG color-map will be converted to sRGB + * regardless of the convert_to_8_bit flag. + * + * With all APIs row_stride is handled as in the read APIs - it is the spacing + * from one row to the next in component sized units (1 or 2 bytes) and if + * negative indicates a bottom-up row layout in the buffer. + * + * Note that the write API does not support interlacing or sub-8-bit pixels. + */ +#endif /* STDIO */ +#endif /* SIMPLIFIED_WRITE */ +/******************************************************************************* + * END OF SIMPLIFIED API + ******************************************************************************/ +#endif /* SIMPLIFIED_{READ|WRITE} */ + +#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED +PNG_EXPORT(242, void, png_set_check_for_invalid_index, + (png_structrp png_ptr, int allowed)); +# ifdef PNG_GET_PALETTE_MAX_SUPPORTED +PNG_EXPORT(243, int, png_get_palette_max, (png_const_structp png_ptr, + png_const_infop info_ptr)); +# endif +#endif /* CHECK_FOR_INVALID_INDEX */ + +/******************************************************************************* + * IMPLEMENTATION OPTIONS + ******************************************************************************* + * + * Support for arbitrary implementation-specific optimizations. The API allows + * particular options to be turned on or off. 'Option' is the number of the + * option and 'onoff' is 0 (off) or non-0 (on). The value returned is given + * by the PNG_OPTION_ defines below. + * + * HARDWARE: normally hardware capabilites, such as the Intel SSE instructions, + * are detected at run time, however sometimes it may be impossible + * to do this in user mode, in which case it is necessary to discover + * the capabilities in an OS specific way. Such capabilities are + * listed here when libpng has support for them and must be turned + * ON by the application if present. + * + * SOFTWARE: sometimes software optimizations actually result in performance + * decrease on some architectures or systems, or with some sets of + * PNG images. 'Software' options allow such optimizations to be + * selected at run time. + */ +#ifdef PNG_SET_OPTION_SUPPORTED +#ifdef PNG_ARM_NEON_API_SUPPORTED +# define PNG_ARM_NEON 0 /* HARDWARE: ARM Neon SIMD instructions supported */ #endif +#define PNG_MAXIMUM_INFLATE_WINDOW 2 /* SOFTWARE: force maximum window */ +#define PNG_SKIP_sRGB_CHECK_PROFILE 4 /* SOFTWARE: Check ICC profile for sRGB */ +#define PNG_OPTION_NEXT 6 /* Next option - numbers must be even */ + +/* Return values: NOTE: there are four values and 'off' is *not* zero */ +#define PNG_OPTION_UNSET 0 /* Unset - defaults to off */ +#define PNG_OPTION_INVALID 1 /* Option number out of range */ +#define PNG_OPTION_OFF 2 +#define PNG_OPTION_ON 3 + +PNG_EXPORT(244, int, png_set_option, (png_structrp png_ptr, int option, + int onoff)); +#endif /* SET_OPTION */ + +/******************************************************************************* + * END OF HARDWARE AND SOFTWARE OPTIONS + ******************************************************************************/ -/* Maintainer: Put new public prototypes here ^, in libpng.3, and project - * defs +/* Maintainer: Put new public prototypes here ^, in libpng.3, in project + * defs, and in scripts/symbols.def. */ /* The last ordinal number (this is the *last* one already used; the next - * one to use is one more than this.) Maintainer, remember to add an entry to - * scripts/symbols.def as well. + * one to use is one more than this.) */ #ifdef PNG_EXPORT_LAST_ORDINAL - PNG_EXPORT_LAST_ORDINAL(234); + PNG_EXPORT_LAST_ORDINAL(244); #endif #ifdef __cplusplus |