Glenn Randers-Pehrson | d60b8fa | 2006-04-20 21:31:14 -0500 | [diff] [blame] | 1 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 2 | /* pngpriv.h - private declarations for use inside libpng |
Glenn Randers-Pehrson | d60b8fa | 2006-04-20 21:31:14 -0500 | [diff] [blame] | 3 | * |
Glenn Randers-Pehrson | d60b8fa | 2006-04-20 21:31:14 -0500 | [diff] [blame] | 4 | * For conditions of distribution and use, see copyright notice in png.h |
Glenn Randers-Pehrson | 64b863c | 2011-01-04 09:57:06 -0600 | [diff] [blame] | 5 | * Copyright (c) 1998-2011 Glenn Randers-Pehrson |
Glenn Randers-Pehrson | d60b8fa | 2006-04-20 21:31:14 -0500 | [diff] [blame] | 6 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
| 7 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
Glenn Randers-Pehrson | 3e61d79 | 2009-06-24 09:31:28 -0500 | [diff] [blame] | 8 | * |
John Bowler | aff4402 | 2011-11-03 16:11:08 -0500 | [diff] [blame] | 9 | * Last changed in libpng 1.5.7 [(PENDING RELEASE)] |
Glenn Randers-Pehrson | f5ea1b7 | 2011-01-06 06:42:51 -0600 | [diff] [blame] | 10 | * |
Glenn Randers-Pehrson | bfbf865 | 2009-06-26 21:46:52 -0500 | [diff] [blame] | 11 | * This code is released under the libpng license. |
Glenn Randers-Pehrson | c332bbc | 2009-06-25 13:43:50 -0500 | [diff] [blame] | 12 | * For conditions of distribution and use, see the disclaimer |
Glenn Randers-Pehrson | 037023b | 2009-06-24 10:27:36 -0500 | [diff] [blame] | 13 | * and license in png.h |
Glenn Randers-Pehrson | d60b8fa | 2006-04-20 21:31:14 -0500 | [diff] [blame] | 14 | */ |
| 15 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 16 | /* The symbols declared in this file (including the functions declared |
| 17 | * as PNG_EXTERN) are PRIVATE. They are not part of the libpng public |
| 18 | * interface, and are not recommended for use by regular applications. |
| 19 | * Some of them may become public in the future; others may stay private, |
| 20 | * change in an incompatible way, or even disappear. |
| 21 | * Although the libpng users are not forbidden to include this header, |
| 22 | * they should be well aware of the issues that may arise from doing so. |
| 23 | */ |
| 24 | |
| 25 | #ifndef PNGPRIV_H |
| 26 | #define PNGPRIV_H |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 27 | |
Glenn Randers-Pehrson | b3b7168 | 2011-05-03 22:30:19 -0500 | [diff] [blame] | 28 | /* Feature Test Macros. The following are defined here to ensure that correctly |
| 29 | * implemented libraries reveal the APIs libpng needs to build and hide those |
| 30 | * that are not needed and potentially damaging to the compilation. |
| 31 | * |
| 32 | * Feature Test Macros must be defined before any system header is included (see |
| 33 | * POSIX 1003.1 2.8.2 "POSIX Symbols." |
| 34 | * |
| 35 | * These macros only have an effect if the operating system supports either |
| 36 | * POSIX 1003.1 or C99, or both. On other operating systems (particularly |
| 37 | * Windows/Visual Studio) there is no effect; the OS specific tests below are |
| 38 | * still required (as of 2011-05-02.) |
| 39 | */ |
| 40 | #define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */ |
Glenn Randers-Pehrson | b3b7168 | 2011-05-03 22:30:19 -0500 | [diff] [blame] | 41 | |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 42 | /* This is required for the definition of abort(), used as a last ditch |
| 43 | * error handler when all else fails. |
| 44 | */ |
| 45 | #include <stdlib.h> |
| 46 | |
Glenn Randers-Pehrson | 65c0339 | 2011-10-06 21:54:17 -0500 | [diff] [blame] | 47 | /* This is used to find 'offsetof', used below for alignment tests. */ |
| 48 | #include <stddef.h> |
| 49 | |
John Bowler | 7b97965 | 2011-08-16 22:36:43 -0500 | [diff] [blame] | 50 | #define PNGLIB_BUILD /*libpng is being built, not used*/ |
| 51 | |
Glenn Randers-Pehrson | aecef09 | 2010-04-17 18:03:02 -0500 | [diff] [blame] | 52 | #ifdef PNG_USER_CONFIG |
| 53 | # include "pngusr.h" |
Glenn Randers-Pehrson | 4f108d8 | 2010-08-24 21:05:43 -0500 | [diff] [blame] | 54 | /* These should have been defined in pngusr.h */ |
| 55 | # ifndef PNG_USER_PRIVATEBUILD |
| 56 | # define PNG_USER_PRIVATEBUILD "Custom libpng build" |
| 57 | # endif |
| 58 | # ifndef PNG_USER_DLLFNAME_POSTFIX |
| 59 | # define PNG_USER_DLLFNAME_POSTFIX "Cb" |
| 60 | # endif |
Glenn Randers-Pehrson | aecef09 | 2010-04-17 18:03:02 -0500 | [diff] [blame] | 61 | #endif |
John Bowler | 7b97965 | 2011-08-16 22:36:43 -0500 | [diff] [blame] | 62 | |
| 63 | /* Is this a build of a DLL where compilation of the object modules requires |
| 64 | * different preprocessor settings to those required for a simple library? If |
| 65 | * so PNG_BUILD_DLL must be set. |
| 66 | * |
| 67 | * If libpng is used inside a DLL but that DLL does not export the libpng APIs |
| 68 | * PNG_BUILD_DLL must not be set. To avoid the code below kicking in build a |
| 69 | * static library of libpng then link the DLL against that. |
| 70 | */ |
| 71 | #ifndef PNG_BUILD_DLL |
| 72 | # ifdef DLL_EXPORT |
| 73 | /* This is set by libtool when files are compiled for a DLL; libtool |
| 74 | * always compiles twice, even on systems where it isn't necessary. Set |
| 75 | * PNG_BUILD_DLL in case it is necessary: |
| 76 | */ |
| 77 | # define PNG_BUILD_DLL |
| 78 | # else |
| 79 | # ifdef _WINDLL |
| 80 | /* This is set by the Microsoft Visual Studio IDE in projects that |
| 81 | * build a DLL. It can't easily be removed from those projects (it |
| 82 | * isn't visible in the Visual Studio UI) so it is a fairly reliable |
| 83 | * indication that PNG_IMPEXP needs to be set to the DLL export |
| 84 | * attributes. |
| 85 | */ |
| 86 | # define PNG_BUILD_DLL |
| 87 | # else |
| 88 | # ifdef __DLL__ |
| 89 | /* This is set by the Borland C system when compiling for a DLL |
| 90 | * (as above.) |
| 91 | */ |
| 92 | # define PNG_BUILD_DLL |
| 93 | # else |
| 94 | /* Add additional compiler cases here. */ |
| 95 | # endif |
| 96 | # endif |
| 97 | # endif |
| 98 | #endif /* Setting PNG_BUILD_DLL if required */ |
| 99 | |
| 100 | /* See pngconf.h for more details: the builder of the library may set this on |
| 101 | * the command line to the right thing for the specific compilation system or it |
| 102 | * may be automagically set above (at present we know of no system where it does |
| 103 | * need to be set on the command line.) |
| 104 | * |
| 105 | * PNG_IMPEXP must be set here when building the library to prevent pngconf.h |
| 106 | * setting it to the "import" setting for a DLL build. |
| 107 | */ |
| 108 | #ifndef PNG_IMPEXP |
| 109 | # ifdef PNG_BUILD_DLL |
| 110 | # define PNG_IMPEXP PNG_DLL_EXPORT |
| 111 | # else |
| 112 | /* Not building a DLL, or the DLL doesn't require specific export |
| 113 | * definitions. |
| 114 | */ |
| 115 | # define PNG_IMPEXP |
| 116 | # endif |
| 117 | #endif |
| 118 | |
| 119 | /* No warnings for private or deprecated functions in the build: */ |
| 120 | #ifndef PNG_DEPRECATED |
| 121 | # define PNG_DEPRECATED |
| 122 | #endif |
| 123 | #ifndef PNG_PRIVATE |
| 124 | # define PNG_PRIVATE |
| 125 | #endif |
| 126 | |
Glenn Randers-Pehrson | c3cd22b | 2010-03-08 21:10:25 -0600 | [diff] [blame] | 127 | #include "png.h" |
| 128 | #include "pnginfo.h" |
| 129 | #include "pngstruct.h" |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 130 | |
John Bowler | 7b97965 | 2011-08-16 22:36:43 -0500 | [diff] [blame] | 131 | /* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */ |
| 132 | #ifndef PNG_DLL_EXPORT |
| 133 | # define PNG_DLL_EXPORT |
| 134 | #endif |
| 135 | |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 136 | /* This is used for 16 bit gamma tables - only the top level pointers are const, |
| 137 | * this could be changed: |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 138 | */ |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 139 | typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp; |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 140 | |
Glenn Randers-Pehrson | dc6182a | 2010-03-09 16:45:06 -0600 | [diff] [blame] | 141 | /* Added at libpng-1.2.9 */ |
| 142 | /* Moved to pngpriv.h at libpng-1.5.0 */ |
| 143 | |
| 144 | /* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure" |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 145 | * script. We may need it here to get the correct configuration on things |
| 146 | * like limits. |
Glenn Randers-Pehrson | dc6182a | 2010-03-09 16:45:06 -0600 | [diff] [blame] | 147 | */ |
| 148 | #ifdef PNG_CONFIGURE_LIBPNG |
| 149 | # ifdef HAVE_CONFIG_H |
| 150 | # include "config.h" |
| 151 | # endif |
| 152 | #endif |
| 153 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 154 | /* Moved to pngpriv.h at libpng-1.5.0 */ |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame] | 155 | /* NOTE: some of these may have been used in external applications as |
| 156 | * these definitions were exposed in pngconf.h prior to 1.5. |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 157 | */ |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame] | 158 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 159 | /* If you are running on a machine where you cannot allocate more |
| 160 | * than 64K of memory at once, uncomment this. While libpng will not |
| 161 | * normally need that much memory in a chunk (unless you load up a very |
| 162 | * large file), zlib needs to know how big of a chunk it can use, and |
| 163 | * libpng thus makes sure to check any memory allocation to verify it |
| 164 | * will fit into memory. |
| 165 | * |
| 166 | * zlib provides 'MAXSEG_64K' which, if defined, indicates the |
| 167 | * same limit and pngconf.h (already included) sets the limit |
| 168 | * if certain operating systems are detected. |
| 169 | */ |
| 170 | #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) |
| 171 | # define PNG_MAX_MALLOC_64K |
| 172 | #endif |
| 173 | |
Glenn Randers-Pehrson | f3dd1cc | 2011-03-18 22:02:20 -0500 | [diff] [blame] | 174 | #ifndef PNG_UNUSED |
Glenn Randers-Pehrson | 25d2d47 | 2011-01-31 10:25:10 -0600 | [diff] [blame] | 175 | /* Unused formal parameter warnings are silenced using the following macro |
| 176 | * which is expected to have no bad effects on performance (optimizing |
| 177 | * compilers will probably remove it entirely). Note that if you replace |
| 178 | * it with something other than whitespace, you must include the terminating |
| 179 | * semicolon. |
Glenn Randers-Pehrson | d546f43 | 2010-12-04 20:41:36 -0600 | [diff] [blame] | 180 | */ |
Glenn Randers-Pehrson | f3dd1cc | 2011-03-18 22:02:20 -0500 | [diff] [blame] | 181 | # define PNG_UNUSED(param) (void)param; |
| 182 | #endif |
Glenn Randers-Pehrson | bf3293a | 2011-01-28 15:14:43 -0600 | [diff] [blame] | 183 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 184 | /* Just a little check that someone hasn't tried to define something |
| 185 | * contradictory. |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 186 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 187 | #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K) |
| 188 | # undef PNG_ZBUF_SIZE |
| 189 | # define PNG_ZBUF_SIZE 65536L |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 190 | #endif |
| 191 | |
John Bowler | 8d26126 | 2011-06-18 13:37:11 -0500 | [diff] [blame] | 192 | /* PNG_STATIC is used to mark internal file scope functions if they need to be |
| 193 | * accessed for implementation tests (see the code in tests/?*). |
| 194 | */ |
| 195 | #ifndef PNG_STATIC |
| 196 | # define PNG_STATIC static |
| 197 | #endif |
| 198 | |
John Bowler | 7875d53 | 2011-11-07 22:33:49 -0600 | [diff] [blame^] | 199 | /* C99 restrict is used where possible, to do this 'restrict' is defined as |
| 200 | * empty if we can't be sure it is supported. configure builds have already |
| 201 | * done this work. |
| 202 | */ |
| 203 | #ifdef PNG_CONFIGURE_LIBPNG |
| 204 | # define PNG_RESTRICT restrict |
| 205 | #else |
| 206 | /* Modern compilers support restrict, but assume not for anything not |
| 207 | * recognized here: |
| 208 | */ |
| 209 | # if defined __GNUC__ || defined _MSC_VER || defined __WATCOMC__ |
| 210 | # define PNG_RESTRICT restrict |
| 211 | # else |
| 212 | # define PNG_RESTRICT |
| 213 | # endif |
| 214 | #endif |
| 215 | |
John Bowler | 88b77cc | 2011-05-05 06:49:55 -0500 | [diff] [blame] | 216 | /* If warnings or errors are turned off the code is disabled or redirected here. |
Glenn Randers-Pehrson | ef217b7 | 2011-06-15 12:58:27 -0500 | [diff] [blame] | 217 | * From 1.5.4 functions have been added to allow very limited formatting of |
John Bowler | 88b77cc | 2011-05-05 06:49:55 -0500 | [diff] [blame] | 218 | * error and warning messages - this code will also be disabled here. |
Glenn Randers-Pehrson | aecef09 | 2010-04-17 18:03:02 -0500 | [diff] [blame] | 219 | */ |
John Bowler | 88b77cc | 2011-05-05 06:49:55 -0500 | [diff] [blame] | 220 | #ifdef PNG_WARNINGS_SUPPORTED |
| 221 | # define PNG_WARNING_PARAMETERS(p) png_warning_parameters p; |
| 222 | #else |
| 223 | # define png_warning(s1,s2) ((void)(s1)) |
| 224 | # define png_chunk_warning(s1,s2) ((void)(s1)) |
| 225 | # define png_warning_parameter(p,number,string) ((void)0) |
| 226 | # define png_warning_parameter_unsigned(p,number,format,value) ((void)0) |
| 227 | # define png_warning_parameter_signed(p,number,format,value) ((void)0) |
| 228 | # define png_formatted_warning(pp,p,message) ((void)(pp)) |
Glenn Randers-Pehrson | af855e4 | 2011-05-07 10:52:49 -0500 | [diff] [blame] | 229 | # define PNG_WARNING_PARAMETERS(p) |
Glenn Randers-Pehrson | aecef09 | 2010-04-17 18:03:02 -0500 | [diff] [blame] | 230 | #endif |
| 231 | #ifndef PNG_ERROR_TEXT_SUPPORTED |
| 232 | # define png_error(s1,s2) png_err(s1) |
| 233 | # define png_chunk_error(s1,s2) png_err(s1) |
Glenn Randers-Pehrson | 48dc6eb | 2010-07-31 07:09:58 -0500 | [diff] [blame] | 234 | # define png_fixed_error(s1,s2) png_err(s1) |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 235 | #endif |
| 236 | |
Glenn Randers-Pehrson | 0ee5144 | 2010-07-12 06:29:17 -0500 | [diff] [blame] | 237 | #ifndef PNG_EXTERN |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 238 | /* The functions exported by PNG_EXTERN are internal functions, which |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 239 | * aren't usually used outside the library (as far as I know), so it is |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 240 | * debatable if they should be exported at all. In the future, when it |
| 241 | * is possible to have run-time registry of chunk-handling functions, |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame] | 242 | * some of these might be made available again. |
Glenn Randers-Pehrson | 0ee5144 | 2010-07-12 06:29:17 -0500 | [diff] [blame] | 243 | # define PNG_EXTERN extern |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 244 | */ |
Glenn Randers-Pehrson | 0ee5144 | 2010-07-12 06:29:17 -0500 | [diff] [blame] | 245 | # define PNG_EXTERN |
| 246 | #endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 247 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 248 | /* Some fixed point APIs are still required even if not exported because |
| 249 | * they get used by the corresponding floating point APIs. This magic |
| 250 | * deals with this: |
| 251 | */ |
| 252 | #ifdef PNG_FIXED_POINT_SUPPORTED |
| 253 | # define PNGFAPI PNGAPI |
| 254 | #else |
| 255 | # define PNGFAPI /* PRIVATE */ |
| 256 | #endif |
| 257 | |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 258 | /* Other defines specific to compilers can go here. Try to keep |
| 259 | * them inside an appropriate ifdef/endif pair for portability. |
| 260 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 261 | #if defined(PNG_FLOATING_POINT_SUPPORTED) ||\ |
| 262 | defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) |
Glenn Randers-Pehrson | 233357e | 2010-07-29 21:49:38 -0500 | [diff] [blame] | 263 | /* png.c requires the following ANSI-C constants if the conversion of |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 264 | * floating point to ASCII is implemented therein: |
Glenn Randers-Pehrson | c36bb79 | 2011-02-12 09:49:07 -0600 | [diff] [blame] | 265 | * |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 266 | * DBL_DIG Maximum number of decimal digits (can be set to any constant) |
Glenn Randers-Pehrson | 233357e | 2010-07-29 21:49:38 -0500 | [diff] [blame] | 267 | * DBL_MIN Smallest normalized fp number (can be set to an arbitrary value) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 268 | * DBL_MAX Maximum floating point number (can be set to an arbitrary value) |
| 269 | */ |
| 270 | # include <float.h> |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 271 | |
Glenn Randers-Pehrson | d00bbb2 | 2010-03-14 09:15:49 -0500 | [diff] [blame] | 272 | # if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \ |
| 273 | defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC) |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 274 | /* We need to check that <math.h> hasn't already been included earlier |
| 275 | * as it seems it doesn't agree with <fp.h>, yet we should really use |
| 276 | * <fp.h> if possible. |
| 277 | */ |
| 278 | # if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__) |
| 279 | # include <fp.h> |
| 280 | # endif |
| 281 | # else |
| 282 | # include <math.h> |
| 283 | # endif |
| 284 | # if defined(_AMIGA) && defined(__SASC) && defined(_M68881) |
| 285 | /* Amiga SAS/C: We must include builtin FPU functions when compiling using |
| 286 | * MATH=68881 |
| 287 | */ |
| 288 | # include <m68881.h> |
| 289 | # endif |
| 290 | #endif |
| 291 | |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 292 | /* This provides the non-ANSI (far) memory allocation routines. */ |
| 293 | #if defined(__TURBOC__) && defined(__MSDOS__) |
| 294 | # include <mem.h> |
| 295 | # include <alloc.h> |
| 296 | #endif |
| 297 | |
| 298 | #if defined(WIN32) || defined(_Windows) || defined(_WINDOWS) || \ |
Glenn Randers-Pehrson | f74c5ac | 2009-09-20 07:27:34 -0500 | [diff] [blame] | 299 | defined(_WIN32) || defined(__WIN32__) |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 300 | # include <windows.h> /* defines _WINDOWS_ macro */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 301 | #endif |
| 302 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 303 | /* Moved here around 1.5.0beta36 from pngconf.h */ |
| 304 | /* Users may want to use these so they are not private. Any library |
| 305 | * functions that are passed far data must be model-independent. |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 306 | */ |
| 307 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 308 | /* Memory model/platform independent fns */ |
| 309 | #ifndef PNG_ABORT |
| 310 | # ifdef _WINDOWS_ |
| 311 | # define PNG_ABORT() ExitProcess(0) |
| 312 | # else |
| 313 | # define PNG_ABORT() abort() |
| 314 | # endif |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 315 | #endif |
| 316 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 317 | #ifdef USE_FAR_KEYWORD |
| 318 | /* Use this to make far-to-near assignments */ |
| 319 | # define CHECK 1 |
| 320 | # define NOCHECK 0 |
| 321 | # define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK)) |
| 322 | # define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK)) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 323 | # define png_strlen _fstrlen |
| 324 | # define png_memcmp _fmemcmp /* SJT: added */ |
| 325 | # define png_memcpy _fmemcpy |
| 326 | # define png_memset _fmemset |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 327 | #else |
| 328 | # ifdef _WINDOWS_ /* Favor Windows over C runtime fns */ |
| 329 | # define CVT_PTR(ptr) (ptr) |
| 330 | # define CVT_PTR_NOCHECK(ptr) (ptr) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 331 | # define png_strlen lstrlenA |
| 332 | # define png_memcmp memcmp |
| 333 | # define png_memcpy CopyMemory |
| 334 | # define png_memset memset |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 335 | # else |
| 336 | # define CVT_PTR(ptr) (ptr) |
| 337 | # define CVT_PTR_NOCHECK(ptr) (ptr) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 338 | # define png_strlen strlen |
| 339 | # define png_memcmp memcmp /* SJT: added */ |
| 340 | # define png_memcpy memcpy |
| 341 | # define png_memset memset |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 342 | # endif |
| 343 | #endif |
Glenn Randers-Pehrson | 65c0339 | 2011-10-06 21:54:17 -0500 | [diff] [blame] | 344 | |
John Bowler | 4e68aa7 | 2011-10-11 16:01:33 -0500 | [diff] [blame] | 345 | /* These macros may need to be architecture dependent. */ |
| 346 | #define PNG_ALIGN_NONE 0 /* do not use data alignment */ |
| 347 | #define PNG_ALIGN_ALWAYS 1 /* assume unaligned accesses are OK */ |
Glenn Randers-Pehrson | 65c0339 | 2011-10-06 21:54:17 -0500 | [diff] [blame] | 348 | #ifdef offsetof |
John Bowler | 4e68aa7 | 2011-10-11 16:01:33 -0500 | [diff] [blame] | 349 | # define PNG_ALIGN_OFFSET 2 /* use offsetof to determine alignment */ |
| 350 | #else |
| 351 | # define PNG_ALIGN_OFFSET -1 /* prevent the use of this */ |
| 352 | #endif |
| 353 | #define PNG_ALIGN_SIZE 3 /* use sizeof to determine alignment */ |
| 354 | |
| 355 | #ifndef PNG_ALIGN_TYPE |
| 356 | /* Default to using aligned access optimizations and requiring alignment to a |
| 357 | * multiple of the data type size. Override in a compiler specific fashion |
| 358 | * if necessary by inserting tests here: |
| 359 | */ |
| 360 | # define PNG_ALIGN_TYPE PNG_ALIGN_SIZE |
| 361 | #endif |
| 362 | |
| 363 | #if PNG_ALIGN_TYPE == PNG_ALIGN_SIZE |
| 364 | /* This is used because in some compiler implementations non-aligned |
| 365 | * structure members are supported, so the offsetof approach below fails. |
| 366 | * Set PNG_ALIGN_TO_SIZE=0 for compiler combinations where unaligned access |
| 367 | * is good for performance. Do not do this unless you have tested the result |
| 368 | * and understand it. |
| 369 | */ |
| 370 | # define png_alignof(type) (sizeof (type)) |
| 371 | #else |
| 372 | # if PNG_ALIGN_TYPE == PNG_ALIGN_OFFSET |
| 373 | # define png_alignof(type) offsetof(struct{char c; type t;}, t) |
| 374 | # else |
| 375 | # if PNG_ALIGN_TYPE == PNG_ALIGN_ALWAYS |
| 376 | # define png_alignof(type) (1) |
| 377 | # endif |
| 378 | /* Else leave png_alignof undefined to prevent use thereof */ |
| 379 | # endif |
Glenn Randers-Pehrson | 65c0339 | 2011-10-06 21:54:17 -0500 | [diff] [blame] | 380 | #endif |
| 381 | |
| 382 | /* This implicitly assumes alignment is always to a power of 2. */ |
| 383 | #ifdef png_alignof |
| 384 | # define png_isaligned(ptr, type)\ |
John Bowler | 4e68aa7 | 2011-10-11 16:01:33 -0500 | [diff] [blame] | 385 | ((((const char*)ptr-(const char*)0) & (png_alignof(type)-1)) == 0) |
Glenn Randers-Pehrson | 65c0339 | 2011-10-06 21:54:17 -0500 | [diff] [blame] | 386 | #else |
| 387 | # define png_isaligned(ptr, type) 0 |
| 388 | #endif |
| 389 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 390 | /* End of memory model/platform independent support */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 391 | /* End of 1.5.0beta36 move from pngconf.h */ |
| 392 | |
| 393 | /* CONSTANTS and UTILITY MACROS |
| 394 | * These are used internally by libpng and not exposed in the API |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 395 | */ |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame] | 396 | |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 397 | /* Various modes of operation. Note that after an init, mode is set to |
Glenn Randers-Pehrson | 2d3fc1c | 2011-05-10 23:48:00 -0500 | [diff] [blame] | 398 | * zero automatically when the structure is created. Three of these |
| 399 | * are defined in png.h because they need to be visible to applications |
| 400 | * that call png_set_unknown_chunk(). |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 401 | */ |
Glenn Randers-Pehrson | 2d3fc1c | 2011-05-10 23:48:00 -0500 | [diff] [blame] | 402 | /* #define PNG_HAVE_IHDR 0x01 (defined in png.h) */ |
| 403 | /* #define PNG_HAVE_PLTE 0x02 (defined in png.h) */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 404 | #define PNG_HAVE_IDAT 0x04 |
Glenn Randers-Pehrson | 2d3fc1c | 2011-05-10 23:48:00 -0500 | [diff] [blame] | 405 | /* #define PNG_AFTER_IDAT 0x08 (defined in png.h) */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 406 | #define PNG_HAVE_IEND 0x10 |
| 407 | #define PNG_HAVE_gAMA 0x20 |
| 408 | #define PNG_HAVE_cHRM 0x40 |
| 409 | #define PNG_HAVE_sRGB 0x80 |
| 410 | #define PNG_HAVE_CHUNK_HEADER 0x100 |
| 411 | #define PNG_WROTE_tIME 0x200 |
| 412 | #define PNG_WROTE_INFO_BEFORE_PLTE 0x400 |
| 413 | #define PNG_BACKGROUND_IS_GRAY 0x800 |
| 414 | #define PNG_HAVE_PNG_SIGNATURE 0x1000 |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 415 | #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 416 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 417 | /* Flags for the transformations the PNG library does on the image data */ |
Glenn Randers-Pehrson | 1916f6a | 2008-08-14 13:44:49 -0500 | [diff] [blame] | 418 | #define PNG_BGR 0x0001 |
| 419 | #define PNG_INTERLACE 0x0002 |
| 420 | #define PNG_PACK 0x0004 |
| 421 | #define PNG_SHIFT 0x0008 |
| 422 | #define PNG_SWAP_BYTES 0x0010 |
| 423 | #define PNG_INVERT_MONO 0x0020 |
Glenn Randers-Pehrson | 3cd7cff | 2010-04-16 19:27:08 -0500 | [diff] [blame] | 424 | #define PNG_QUANTIZE 0x0040 |
John Bowler | d273ad2 | 2011-05-07 21:00:28 -0500 | [diff] [blame] | 425 | #define PNG_COMPOSE 0x0080 /* Was PNG_BACKGROUND */ |
Glenn Randers-Pehrson | 1916f6a | 2008-08-14 13:44:49 -0500 | [diff] [blame] | 426 | #define PNG_BACKGROUND_EXPAND 0x0100 |
John Bowler | 4d56296 | 2011-02-12 09:01:20 -0600 | [diff] [blame] | 427 | #define PNG_EXPAND_16 0x0200 /* Added to libpng 1.5.2 */ |
John Bowler | 8d26126 | 2011-06-18 13:37:11 -0500 | [diff] [blame] | 428 | #define PNG_16_TO_8 0x0400 /* Becomes 'chop' in 1.5.4 */ |
Glenn Randers-Pehrson | 1916f6a | 2008-08-14 13:44:49 -0500 | [diff] [blame] | 429 | #define PNG_RGBA 0x0800 |
| 430 | #define PNG_EXPAND 0x1000 |
| 431 | #define PNG_GAMMA 0x2000 |
| 432 | #define PNG_GRAY_TO_RGB 0x4000 |
Glenn Randers-Pehrson | d326111 | 2011-09-15 08:12:08 -0500 | [diff] [blame] | 433 | #define PNG_FILLER 0x8000 |
| 434 | #define PNG_PACKSWAP 0x10000 |
| 435 | #define PNG_SWAP_ALPHA 0x20000 |
| 436 | #define PNG_STRIP_ALPHA 0x40000 |
| 437 | #define PNG_INVERT_ALPHA 0x80000 |
| 438 | #define PNG_USER_TRANSFORM 0x100000 |
| 439 | #define PNG_RGB_TO_GRAY_ERR 0x200000 |
| 440 | #define PNG_RGB_TO_GRAY_WARN 0x400000 |
| 441 | #define PNG_RGB_TO_GRAY 0x600000 /* two bits, RGB_TO_GRAY_ERR|WARN */ |
| 442 | #define PNG_ENCODE_ALPHA 0x800000 /* Added to libpng-1.5.4 */ |
| 443 | #define PNG_ADD_ALPHA 0x1000000 /* Added to libpng-1.2.7 */ |
| 444 | #define PNG_EXPAND_tRNS 0x2000000 /* Added to libpng-1.2.9 */ |
| 445 | #define PNG_SCALE_16_TO_8 0x4000000 /* Added to libpng-1.5.4 */ |
| 446 | /* 0x8000000 unused */ |
| 447 | /* 0x10000000 unused */ |
| 448 | /* 0x20000000 unused */ |
| 449 | /* 0x40000000 unused */ |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 450 | /* Flags for png_create_struct */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 451 | #define PNG_STRUCT_PNG 0x0001 |
| 452 | #define PNG_STRUCT_INFO 0x0002 |
| 453 | |
| 454 | /* Scaling factor for filter heuristic weighting calculations */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 455 | #define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT)) |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 456 | #define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT)) |
| 457 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 458 | /* Flags for the png_ptr->flags rather than declaring a byte for each one */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 459 | #define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001 |
| 460 | #define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002 |
| 461 | #define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004 |
| 462 | #define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008 |
| 463 | #define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010 |
| 464 | #define PNG_FLAG_ZLIB_FINISHED 0x0020 |
| 465 | #define PNG_FLAG_ROW_INIT 0x0040 |
| 466 | #define PNG_FLAG_FILLER_AFTER 0x0080 |
| 467 | #define PNG_FLAG_CRC_ANCILLARY_USE 0x0100 |
| 468 | #define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200 |
| 469 | #define PNG_FLAG_CRC_CRITICAL_USE 0x0400 |
| 470 | #define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800 |
Glenn Randers-Pehrson | ef217b7 | 2011-06-15 12:58:27 -0500 | [diff] [blame] | 471 | #define PNG_FLAG_ASSUME_sRGB 0x1000 /* Added to libpng-1.5.4 */ |
| 472 | #define PNG_FLAG_OPTIMIZE_ALPHA 0x2000 /* Added to libpng-1.5.4 */ |
| 473 | #define PNG_FLAG_DETECT_UNINITIALIZED 0x4000 /* Added to libpng-1.5.4 */ |
John Bowler | f3f7e14 | 2011-09-09 07:32:37 -0500 | [diff] [blame] | 474 | #define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000 |
| 475 | #define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000 |
| 476 | #define PNG_FLAG_LIBRARY_MISMATCH 0x20000 |
| 477 | #define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000 |
| 478 | #define PNG_FLAG_STRIP_ERROR_TEXT 0x80000 |
| 479 | #define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000 |
| 480 | /* 0x200000 unused */ |
| 481 | /* 0x400000 unused */ |
| 482 | #define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000 /* Added to libpng-1.4.0 */ |
| 483 | #define PNG_FLAG_ZTXT_CUSTOM_STRATEGY 0x1000000 /* 5 lines added */ |
| 484 | #define PNG_FLAG_ZTXT_CUSTOM_LEVEL 0x2000000 /* to libpng-1.5.4 */ |
| 485 | #define PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL 0x4000000 |
| 486 | #define PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS 0x8000000 |
| 487 | #define PNG_FLAG_ZTXT_CUSTOM_METHOD 0x10000000 |
| 488 | /* 0x20000000 unused */ |
| 489 | /* 0x40000000 unused */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 490 | |
| 491 | #define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \ |
| 492 | PNG_FLAG_CRC_ANCILLARY_NOWARN) |
| 493 | |
| 494 | #define PNG_FLAG_CRC_CRITICAL_MASK (PNG_FLAG_CRC_CRITICAL_USE | \ |
| 495 | PNG_FLAG_CRC_CRITICAL_IGNORE) |
| 496 | |
| 497 | #define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \ |
| 498 | PNG_FLAG_CRC_CRITICAL_MASK) |
| 499 | |
Glenn Randers-Pehrson | bcb3aac | 2010-09-10 22:05:27 -0500 | [diff] [blame] | 500 | /* zlib.h declares a magic type 'uInt' that limits the amount of data that zlib |
| 501 | * can handle at once. This type need be no larger than 16 bits (so maximum of |
| 502 | * 65535), this define allows us to discover how big it is, but limited by the |
| 503 | * maximuum for png_size_t. The value can be overriden in a library build |
| 504 | * (pngusr.h, or set it in CPPFLAGS) and it works to set it to a considerably |
| 505 | * lower value (e.g. 255 works). A lower value may help memory usage (slightly) |
| 506 | * and may even improve performance on some systems (and degrade it on others.) |
| 507 | */ |
| 508 | #ifndef ZLIB_IO_MAX |
| 509 | # define ZLIB_IO_MAX ((uInt)-1) |
| 510 | #endif |
| 511 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 512 | /* Save typing and make code easier to understand */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 513 | |
| 514 | #define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \ |
| 515 | abs((int)((c1).green) - (int)((c2).green)) + \ |
| 516 | abs((int)((c1).blue) - (int)((c2).blue))) |
| 517 | |
John Bowler | 7875d53 | 2011-11-07 22:33:49 -0600 | [diff] [blame^] | 518 | /* Added to libpng-1.5.7: sRGB convertion tables */ |
| 519 | #ifdef PNG_SIMPLIFIED_READ_SUPPORTED |
| 520 | PNG_EXTERN /*PRIVATE*/ PNG_CONST png_uint_16 png_sRGB_table[256]; |
| 521 | /* Convert from an sRGB encoded value 0..255 to a 16-bit linear value, |
| 522 | * 0..65535. This table gives the closes 16-bit answers (no errors). |
| 523 | */ |
| 524 | #endif |
| 525 | |
| 526 | #if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\ |
| 527 | defined PNG_SIMPLFIED_WRITE_SUPPORTED |
| 528 | PNG_EXTERN /*PRIVATE*/ PNG_CONST png_uint_16 png_sRGB_base[512]; |
| 529 | PNG_EXTERN /*PRIVATE*/ PNG_CONST png_byte png_sRGB_delta[512]; |
| 530 | |
| 531 | #define PNG_sRGB_FROM_LINEAR(linear) ((png_sRGB_base[(linear)>>15] +\ |
| 532 | ((((linear)&0x7fff)*png_sRGB_delta[(linear)>>15])>>12)) >> 8) |
| 533 | /* Given a value 'linear' in the range 0..255*65535 calculate the 8-bit sRGB |
| 534 | * encoded value with maximum error 0.646365. Note that the input is not a |
| 535 | * 16-bit value; it has been multiplied by 255! */ |
| 536 | #endif |
| 537 | |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 538 | /* Added to libpng-1.2.6 JB */ |
| 539 | #define PNG_ROWBYTES(pixel_bits, width) \ |
| 540 | ((pixel_bits) >= 8 ? \ |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 541 | ((png_size_t)(width) * (((png_size_t)(pixel_bits)) >> 3)) : \ |
| 542 | (( ((png_size_t)(width) * ((png_size_t)(pixel_bits))) + 7) >> 3) ) |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 543 | |
| 544 | /* PNG_OUT_OF_RANGE returns true if value is outside the range |
Glenn Randers-Pehrson | 9bf6083 | 2009-09-20 13:37:50 -0500 | [diff] [blame] | 545 | * ideal-delta..ideal+delta. Each argument is evaluated twice. |
| 546 | * "ideal" and "delta" should be constants, normally simple |
| 547 | * integers, "value" a variable. Added to libpng-1.2.6 JB |
| 548 | */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 549 | #define PNG_OUT_OF_RANGE(value, ideal, delta) \ |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 550 | ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) ) |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 551 | |
Glenn Randers-Pehrson | 363f96e | 2010-08-11 09:00:26 -0500 | [diff] [blame] | 552 | /* Conversions between fixed and floating point, only defined if |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 553 | * required (to make sure the code doesn't accidentally use float |
| 554 | * when it is supposedly disabled.) |
| 555 | */ |
| 556 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
Glenn Randers-Pehrson | 233357e | 2010-07-29 21:49:38 -0500 | [diff] [blame] | 557 | /* The floating point conversion can't overflow, though it can and |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 558 | * does lose accuracy relative to the original fixed point value. |
| 559 | * In practice this doesn't matter because png_fixed_point only |
| 560 | * stores numbers with very low precision. The png_ptr and s |
| 561 | * arguments are unused by default but are there in case error |
| 562 | * checking becomes a requirement. |
| 563 | */ |
| 564 | #define png_float(png_ptr, fixed, s) (.00001 * (fixed)) |
| 565 | |
Glenn Randers-Pehrson | 233357e | 2010-07-29 21:49:38 -0500 | [diff] [blame] | 566 | /* The fixed point conversion performs range checking and evaluates |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 567 | * its argument multiple times, so must be used with care. The |
| 568 | * range checking uses the PNG specification values for a signed |
| 569 | * 32 bit fixed point value except that the values are deliberately |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame] | 570 | * rounded-to-zero to an integral value - 21474 (21474.83 is roughly |
| 571 | * (2^31-1) * 100000). 's' is a string that describes the value being |
| 572 | * converted. |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 573 | * |
| 574 | * NOTE: this macro will raise a png_error if the range check fails, |
| 575 | * therefore it is normally only appropriate to use this on values |
| 576 | * that come from API calls or other sources where an out of range |
| 577 | * error indicates a programming error, not a data error! |
| 578 | * |
| 579 | * NOTE: by default this is off - the macro is not used - because the |
| 580 | * function call saves a lot of code. |
| 581 | */ |
| 582 | #ifdef PNG_FIXED_POINT_MACRO_SUPPORTED |
| 583 | #define png_fixed(png_ptr, fp, s) ((fp) <= 21474 && (fp) >= -21474 ?\ |
Glenn Randers-Pehrson | 48dc6eb | 2010-07-31 07:09:58 -0500 | [diff] [blame] | 584 | ((png_fixed_point)(100000 * (fp))) : (png_fixed_error(png_ptr, s),0)) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 585 | #else |
| 586 | PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp, |
| 587 | png_const_charp text)); |
| 588 | #endif |
| 589 | #endif |
| 590 | |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 591 | /* Constants for known chunk types. If you need to add a chunk, define the name |
| 592 | * here. For historical reasons these constants have the form png_<name>; i.e. |
| 593 | * the prefix is lower case. Please use decimal values as the parameters to |
| 594 | * match the ISO PNG specification and to avoid relying on the C locale |
| 595 | * interpretation of character values. |
| 596 | * |
| 597 | * Prior to 1.5.6 these constants were strings, as of 1.5.6 png_uint_32 values |
| 598 | * are computed and a new macro (PNG_STRING_FROM_CHUNK) added to allow a string |
| 599 | * to be generated if required. |
| 600 | * |
| 601 | * PNG_32b correctly produces a value shifted by up to 24 bits, even on |
| 602 | * architectures where (int) is only 16 bits. |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 603 | */ |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 604 | #define PNG_32b(b,s) ((png_uint_32)(b) << (s)) |
| 605 | #define PNG_CHUNK(b1,b2,b3,b4) \ |
| 606 | (PNG_32b(b1,24) | PNG_32b(b2,16) | PNG_32b(b3,8) | PNG_32b(b4,0)) |
| 607 | |
| 608 | #define png_IHDR PNG_CHUNK( 73, 72, 68, 82) |
| 609 | #define png_IDAT PNG_CHUNK( 73, 68, 65, 84) |
| 610 | #define png_IEND PNG_CHUNK( 73, 69, 78, 68) |
| 611 | #define png_PLTE PNG_CHUNK( 80, 76, 84, 69) |
| 612 | #define png_bKGD PNG_CHUNK( 98, 75, 71, 68) |
| 613 | #define png_cHRM PNG_CHUNK( 99, 72, 82, 77) |
| 614 | #define png_gAMA PNG_CHUNK(103, 65, 77, 65) |
| 615 | #define png_hIST PNG_CHUNK(104, 73, 83, 84) |
| 616 | #define png_iCCP PNG_CHUNK(105, 67, 67, 80) |
| 617 | #define png_iTXt PNG_CHUNK(105, 84, 88, 116) |
| 618 | #define png_oFFs PNG_CHUNK(111, 70, 70, 115) |
| 619 | #define png_pCAL PNG_CHUNK(112, 67, 65, 76) |
| 620 | #define png_sCAL PNG_CHUNK(115, 67, 65, 76) |
| 621 | #define png_pHYs PNG_CHUNK(112, 72, 89, 115) |
| 622 | #define png_sBIT PNG_CHUNK(115, 66, 73, 84) |
| 623 | #define png_sPLT PNG_CHUNK(115, 80, 76, 84) |
| 624 | #define png_sRGB PNG_CHUNK(115, 82, 71, 66) |
| 625 | #define png_sTER PNG_CHUNK(115, 84, 69, 82) |
| 626 | #define png_tEXt PNG_CHUNK(116, 69, 88, 116) |
| 627 | #define png_tIME PNG_CHUNK(116, 73, 77, 69) |
| 628 | #define png_tRNS PNG_CHUNK(116, 82, 78, 83) |
| 629 | #define png_zTXt PNG_CHUNK(122, 84, 88, 116) |
| 630 | |
| 631 | /* The following will work on (signed char*) strings, whereas the get_uint_32 |
| 632 | * macro will fail on top-bit-set values because of the sign extension. |
| 633 | */ |
| 634 | #define PNG_CHUNK_FROM_STRING(s)\ |
| 635 | PNG_CHUNK(0xff&(s)[0], 0xff&(s)[1], 0xff&(s)[2], 0xff&(s)[3]) |
| 636 | |
| 637 | /* This uses (char), not (png_byte) to avoid warnings on systems where (char) is |
| 638 | * signed and the argument is a (char[]) This macro will fail miserably on |
| 639 | * systems where (char) is more than 8 bits. |
| 640 | */ |
| 641 | #define PNG_STRING_FROM_CHUNK(s,c)\ |
| 642 | (void)(((char*)(s))[0]=(char)((c)>>24), ((char*)(s))[1]=(char)((c)>>16),\ |
Glenn Randers-Pehrson | d02d6a1 | 2011-09-26 16:43:08 -0500 | [diff] [blame] | 643 | ((char*)(s))[2]=(char)((c)>>8), ((char*)(s))[3]=(char)((c))) |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 644 | |
| 645 | /* Do the same but terminate with a null character. */ |
| 646 | #define PNG_CSTRING_FROM_CHUNK(s,c)\ |
| 647 | (void)(PNG_STRING_FROM_CHUNK(s,c), ((char*)(s))[4] = 0) |
| 648 | |
| 649 | /* Test on flag values as defined in the spec (section 5.4): */ |
| 650 | #define PNG_CHUNK_ANCILLIARY(c) (1 & ((c) >> 29)) |
| 651 | #define PNG_CHUNK_CRITICAL(c) (!PNG_CHUNK_ANCILLIARY(c)) |
| 652 | #define PNG_CHUNK_PRIVATE(c) (1 & ((c) >> 21)) |
| 653 | #define PNG_CHUNK_RESERVED(c) (1 & ((c) >> 13)) |
| 654 | #define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >> 5)) |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 655 | |
Glenn Randers-Pehrson | ef217b7 | 2011-06-15 12:58:27 -0500 | [diff] [blame] | 656 | /* Gamma values (new at libpng-1.5.4): */ |
John Bowler | f70c7d0 | 2011-05-10 22:54:37 -0500 | [diff] [blame] | 657 | #define PNG_GAMMA_MAC_OLD 151724 /* Assume '1.8' is really 2.2/1.45! */ |
| 658 | #define PNG_GAMMA_MAC_INVERSE 65909 |
| 659 | #define PNG_GAMMA_sRGB_INVERSE 45455 |
| 660 | |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 661 | |
| 662 | /* Inhibit C++ name-mangling for libpng functions but not for system calls. */ |
| 663 | #ifdef __cplusplus |
| 664 | extern "C" { |
| 665 | #endif /* __cplusplus */ |
| 666 | |
| 667 | /* These functions are used internally in the code. They generally |
| 668 | * shouldn't be used unless you are writing code to add or replace some |
| 669 | * functionality in libpng. More information about most functions can |
| 670 | * be found in the files where the functions are located. |
| 671 | */ |
| 672 | |
John Bowler | 88b77cc | 2011-05-05 06:49:55 -0500 | [diff] [blame] | 673 | /* Check the user version string for compatibility, returns false if the version |
| 674 | * numbers aren't compatible. |
| 675 | */ |
| 676 | PNG_EXTERN int png_user_version_check(png_structp png_ptr, |
| 677 | png_const_charp user_png_ver); |
| 678 | |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 679 | /* Allocate memory for an internal libpng struct */ |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame] | 680 | PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct,PNGARG((int type)), |
| 681 | PNG_ALLOCATED); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 682 | |
| 683 | /* Free memory from internal libpng struct */ |
| 684 | PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr)); |
| 685 | |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame] | 686 | PNG_EXTERN PNG_FUNCTION(png_voidp,png_create_struct_2, |
| 687 | PNGARG((int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr)), |
| 688 | PNG_ALLOCATED); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 689 | PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 690 | png_free_ptr free_fn, png_voidp mem_ptr)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 691 | |
| 692 | /* Free any memory that info_ptr points to and reset struct. */ |
| 693 | PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 694 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 695 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 696 | /* Function to allocate memory for zlib. PNGAPI is disallowed. */ |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame] | 697 | PNG_EXTERN PNG_FUNCTION(voidpf,png_zalloc,PNGARG((voidpf png_ptr, uInt items, |
| 698 | uInt size)),PNG_ALLOCATED); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 699 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 700 | /* Function to free memory for zlib. PNGAPI is disallowed. */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 701 | PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr)); |
| 702 | |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 703 | /* Next four functions are used internally as callbacks. PNGCBAPI is required |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 704 | * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3, changed to |
| 705 | * PNGCBAPI at 1.5.0 |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 706 | */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 707 | |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 708 | PNG_EXTERN void PNGCBAPI png_default_read_data PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 709 | png_bytep data, png_size_t length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 710 | |
| 711 | #ifdef PNG_PROGRESSIVE_READ_SUPPORTED |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 712 | PNG_EXTERN void PNGCBAPI png_push_fill_buffer PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 713 | png_bytep buffer, png_size_t length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 714 | #endif |
| 715 | |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 716 | PNG_EXTERN void PNGCBAPI png_default_write_data PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 717 | png_bytep data, png_size_t length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 718 | |
Glenn Randers-Pehrson | dbd4014 | 2009-08-31 08:42:02 -0500 | [diff] [blame] | 719 | #ifdef PNG_WRITE_FLUSH_SUPPORTED |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 720 | # ifdef PNG_STDIO_SUPPORTED |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 721 | PNG_EXTERN void PNGCBAPI png_default_flush PNGARG((png_structp png_ptr)); |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 722 | # endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 723 | #endif |
| 724 | |
| 725 | /* Reset the CRC variable */ |
| 726 | PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr)); |
| 727 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 728 | /* Write the "data" buffer to whatever output you are using */ |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 729 | PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, |
| 730 | png_const_bytep data, png_size_t length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 731 | |
Glenn Randers-Pehrson | a581556 | 2010-11-20 21:48:29 -0600 | [diff] [blame] | 732 | /* Read and check the PNG file signature */ |
| 733 | PNG_EXTERN void png_read_sig PNGARG((png_structp png_ptr, png_infop info_ptr)); |
| 734 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 735 | /* Read the chunk header (length + type name) */ |
| 736 | PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr)); |
| 737 | |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 738 | /* Read data from whatever input you are using into the "data" buffer */ |
| 739 | PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 740 | png_size_t length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 741 | |
| 742 | /* Read bytes into buf, and update png_ptr->crc */ |
| 743 | PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 744 | png_size_t length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 745 | |
| 746 | /* Decompress data in a chunk that uses compression */ |
Glenn Randers-Pehrson | 8abcf14 | 2011-04-03 06:22:02 -0500 | [diff] [blame] | 747 | #if defined(PNG_READ_COMPRESSED_TEXT_SUPPORTED) |
Glenn Randers-Pehrson | 895a9c9 | 2008-07-25 08:51:18 -0500 | [diff] [blame] | 748 | PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 749 | int comp_type, png_size_t chunklength, png_size_t prefix_length, |
| 750 | png_size_t *data_length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 751 | #endif |
| 752 | |
| 753 | /* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */ |
| 754 | PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip)); |
| 755 | |
| 756 | /* Read the CRC from the file and compare it to the libpng calculated CRC */ |
| 757 | PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr)); |
| 758 | |
| 759 | /* Calculate the CRC over a section of data. Note that we are only |
| 760 | * passing a maximum of 64K on systems that have this as a memory limit, |
| 761 | * since this is the maximum buffer size we can specify. |
| 762 | */ |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 763 | PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, |
| 764 | png_const_bytep ptr, png_size_t length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 765 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 766 | #ifdef PNG_WRITE_FLUSH_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 767 | PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); |
| 768 | #endif |
| 769 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 770 | /* Write various chunks */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 771 | |
| 772 | /* Write the IHDR chunk, and update the png_struct with the necessary |
| 773 | * information. |
| 774 | */ |
| 775 | PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 776 | png_uint_32 height, |
| 777 | int bit_depth, int color_type, int compression_method, int filter_method, |
| 778 | int interlace_method)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 779 | |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 780 | PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, |
| 781 | png_const_colorp palette, png_uint_32 num_pal)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 782 | |
| 783 | PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 784 | png_size_t length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 785 | |
| 786 | PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr)); |
| 787 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 788 | #ifdef PNG_WRITE_gAMA_SUPPORTED |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 789 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 790 | PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma)); |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 791 | # endif |
| 792 | # ifdef PNG_FIXED_POINT_SUPPORTED |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 793 | PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr, |
| 794 | png_fixed_point file_gamma)); |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 795 | # endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 796 | #endif |
| 797 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 798 | #ifdef PNG_WRITE_sBIT_SUPPORTED |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 799 | PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, |
| 800 | png_const_color_8p sbit, int color_type)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 801 | #endif |
| 802 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 803 | #ifdef PNG_WRITE_cHRM_SUPPORTED |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 804 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 805 | PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 806 | double white_x, double white_y, |
| 807 | double red_x, double red_y, double green_x, double green_y, |
| 808 | double blue_x, double blue_y)); |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 809 | # endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 810 | PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 811 | png_fixed_point int_white_x, png_fixed_point int_white_y, |
| 812 | png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point |
| 813 | int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, |
| 814 | png_fixed_point int_blue_y)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 815 | #endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 816 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 817 | #ifdef PNG_WRITE_sRGB_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 818 | PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 819 | int intent)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 820 | #endif |
| 821 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 822 | #ifdef PNG_WRITE_iCCP_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 823 | PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 824 | png_const_charp name, int compression_type, |
| 825 | png_const_charp profile, int proflen)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 826 | /* Note to maintainer: profile should be png_bytep */ |
| 827 | #endif |
| 828 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 829 | #ifdef PNG_WRITE_sPLT_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 830 | PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 831 | png_const_sPLT_tp palette)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 832 | #endif |
| 833 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 834 | #ifdef PNG_WRITE_tRNS_SUPPORTED |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 835 | PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, |
| 836 | png_const_bytep trans, png_const_color_16p values, int number, |
| 837 | int color_type)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 838 | #endif |
| 839 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 840 | #ifdef PNG_WRITE_bKGD_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 841 | PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 842 | png_const_color_16p values, int color_type)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 843 | #endif |
| 844 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 845 | #ifdef PNG_WRITE_hIST_SUPPORTED |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 846 | PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, |
| 847 | png_const_uint_16p hist, int num_hist)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 848 | #endif |
| 849 | |
Glenn Randers-Pehrson | 205483d | 2011-04-01 12:33:42 -0500 | [diff] [blame] | 850 | /* Chunks that have keywords */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 851 | #if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ |
| 852 | defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) |
| 853 | PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 854 | png_const_charp key, png_charpp new_key)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 855 | #endif |
| 856 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 857 | #ifdef PNG_WRITE_tEXt_SUPPORTED |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 858 | PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_const_charp key, |
| 859 | png_const_charp text, png_size_t text_len)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 860 | #endif |
| 861 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 862 | #ifdef PNG_WRITE_zTXt_SUPPORTED |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 863 | PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_const_charp key, |
| 864 | png_const_charp text, png_size_t text_len, int compression)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 865 | #endif |
| 866 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 867 | #ifdef PNG_WRITE_iTXt_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 868 | PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 869 | int compression, png_const_charp key, png_const_charp lang, |
| 870 | png_const_charp lang_key, png_const_charp text)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 871 | #endif |
| 872 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 873 | #ifdef PNG_TEXT_SUPPORTED /* Added at version 1.0.14 and 1.2.4 */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 874 | PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 875 | png_infop info_ptr, png_const_textp text_ptr, int num_text)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 876 | #endif |
| 877 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 878 | #ifdef PNG_WRITE_oFFs_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 879 | PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 880 | png_int_32 x_offset, png_int_32 y_offset, int unit_type)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 881 | #endif |
| 882 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 883 | #ifdef PNG_WRITE_pCAL_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 884 | PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 885 | png_int_32 X0, png_int_32 X1, int type, int nparams, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 886 | png_const_charp units, png_charpp params)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 887 | #endif |
| 888 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 889 | #ifdef PNG_WRITE_pHYs_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 890 | PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 891 | png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, |
| 892 | int unit_type)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 893 | #endif |
| 894 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 895 | #ifdef PNG_WRITE_tIME_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 896 | PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 897 | png_const_timep mod_time)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 898 | #endif |
| 899 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 900 | #ifdef PNG_WRITE_sCAL_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 901 | PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 902 | int unit, png_const_charp width, png_const_charp height)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 903 | #endif |
| 904 | |
| 905 | /* Called when finished processing a row of data */ |
| 906 | PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); |
| 907 | |
| 908 | /* Internal use only. Called before first row of data */ |
| 909 | PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr)); |
| 910 | |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 911 | /* Combine a row of data, dealing with alpha, etc. if requested. 'row' is an |
Glenn Randers-Pehrson | 65c0339 | 2011-10-06 21:54:17 -0500 | [diff] [blame] | 912 | * array of png_ptr->width pixels. If the image is not interlaced or this |
| 913 | * is the final pass this just does a png_memcpy, otherwise the "display" flag |
| 914 | * is used to determine whether to copy pixels that are not in the current pass. |
| 915 | * |
| 916 | * Because 'png_do_read_interlace' (below) replicates pixels this allows this |
| 917 | * function to achieve the documented 'blocky' appearance during interlaced read |
| 918 | * if display is 1 and the 'sparkle' appearance, where existing pixels in 'row' |
| 919 | * are not changed if they are not in the current pass, when display is 0. |
| 920 | * |
| 921 | * 'display' must be 0 or 1, otherwise the memcpy will be done regardless. |
| 922 | * |
| 923 | * The API always reads from the png_struct row buffer and always assumes that |
| 924 | * it is full width (png_do_read_interlace has already been called.) |
| 925 | * |
| 926 | * This function is only ever used to write to row buffers provided by the |
| 927 | * caller of the relevant libpng API and the row must have already been |
| 928 | * transformed by the read transformations. |
John Bowler | 4e68aa7 | 2011-10-11 16:01:33 -0500 | [diff] [blame] | 929 | * |
| 930 | * The PNG_USE_COMPILE_TIME_MASKS option causes generation of pre-computed |
| 931 | * bitmasks for use within the code, otherwise runtime generated masks are used. |
| 932 | * The default is compile time masks. |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 933 | */ |
John Bowler | 4e68aa7 | 2011-10-11 16:01:33 -0500 | [diff] [blame] | 934 | #ifndef PNG_USE_COMPILE_TIME_MASKS |
| 935 | # define PNG_USE_COMPILE_TIME_MASKS 1 |
| 936 | #endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 937 | PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row, |
Glenn Randers-Pehrson | 65c0339 | 2011-10-06 21:54:17 -0500 | [diff] [blame] | 938 | int display)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 939 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 940 | #ifdef PNG_READ_INTERLACING_SUPPORTED |
Glenn Randers-Pehrson | 65c0339 | 2011-10-06 21:54:17 -0500 | [diff] [blame] | 941 | /* Expand an interlaced row: the 'row_info' describes the pass data that has |
| 942 | * been read in and must correspond to the pixels in 'row', the pixels are |
| 943 | * expanded (moved apart) in 'row' to match the final layout, when doing this |
| 944 | * the pixels are *replicated* to the intervening space. This is essential for |
| 945 | * the correct operation of png_combine_row, above. |
| 946 | */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 947 | PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 948 | png_bytep row, int pass, png_uint_32 transformations)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 949 | #endif |
| 950 | |
| 951 | /* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */ |
| 952 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 953 | #ifdef PNG_WRITE_INTERLACING_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 954 | /* Grab pixels out of a row for an interlaced pass */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 955 | PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 956 | png_bytep row, int pass)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 957 | #endif |
| 958 | |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 959 | /* Unfilter a row: check the filter value before calling this, there is no point |
| 960 | * calling it for PNG_FILTER_VALUE_NONE. |
| 961 | */ |
Mans Rullgard | d3a9480 | 2011-11-03 00:47:55 -0500 | [diff] [blame] | 962 | PNG_EXTERN void png_read_filter_row PNGARG((png_structp pp, png_row_infop row_info, |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 963 | png_bytep row, png_const_bytep prev_row, int filter)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 964 | |
Mans Rullgard | d3a9480 | 2011-11-03 00:47:55 -0500 | [diff] [blame] | 965 | PNG_EXTERN void png_read_filter_row_up_neon PNGARG((png_row_infop row_info, |
| 966 | png_bytep row, png_const_bytep prev_row)); |
| 967 | PNG_EXTERN void png_read_filter_row_sub3_neon PNGARG((png_row_infop row_info, |
| 968 | png_bytep row, png_const_bytep prev_row)); |
| 969 | PNG_EXTERN void png_read_filter_row_sub4_neon PNGARG((png_row_infop row_info, |
| 970 | png_bytep row, png_const_bytep prev_row)); |
| 971 | PNG_EXTERN void png_read_filter_row_avg3_neon PNGARG((png_row_infop row_info, |
| 972 | png_bytep row, png_const_bytep prev_row)); |
| 973 | PNG_EXTERN void png_read_filter_row_avg4_neon PNGARG((png_row_infop row_info, |
| 974 | png_bytep row, png_const_bytep prev_row)); |
| 975 | PNG_EXTERN void png_read_filter_row_paeth3_neon PNGARG((png_row_infop row_info, |
| 976 | png_bytep row, png_const_bytep prev_row)); |
| 977 | PNG_EXTERN void png_read_filter_row_paeth4_neon PNGARG((png_row_infop row_info, |
| 978 | png_bytep row, png_const_bytep prev_row)); |
| 979 | |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 980 | /* Choose the best filter to use and filter the row data */ |
| 981 | PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 982 | png_row_infop row_info)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 983 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 984 | /* Finish a row while reading, dealing with interlacing passes, etc. */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 985 | PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr)); |
| 986 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 987 | /* Initialize the row buffers, etc. */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 988 | PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr)); |
John Bowler | 4a12f4a | 2011-04-17 18:34:22 -0500 | [diff] [blame] | 989 | |
| 990 | #ifdef PNG_READ_TRANSFORMS_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 991 | /* Optional call to update the users info structure */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 992 | PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 993 | png_infop info_ptr)); |
John Bowler | 4a12f4a | 2011-04-17 18:34:22 -0500 | [diff] [blame] | 994 | #endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 995 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 996 | /* These are the functions that do the transformations */ |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 997 | #ifdef PNG_READ_FILLER_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 998 | PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 999 | png_bytep row, png_uint_32 filler, png_uint_32 flags)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1000 | #endif |
| 1001 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1002 | #ifdef PNG_READ_SWAP_ALPHA_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1003 | PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1004 | png_bytep row)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1005 | #endif |
| 1006 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1007 | #ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1008 | PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1009 | png_bytep row)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1010 | #endif |
| 1011 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1012 | #ifdef PNG_READ_INVERT_ALPHA_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1013 | PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1014 | png_bytep row)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1015 | #endif |
| 1016 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1017 | #ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1018 | PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1019 | png_bytep row)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1020 | #endif |
| 1021 | |
| 1022 | #if defined(PNG_WRITE_FILLER_SUPPORTED) || \ |
| 1023 | defined(PNG_READ_STRIP_ALPHA_SUPPORTED) |
John Bowler | 9b872f4 | 2011-02-12 09:00:16 -0600 | [diff] [blame] | 1024 | PNG_EXTERN void png_do_strip_channel PNGARG((png_row_infop row_info, |
| 1025 | png_bytep row, int at_start)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1026 | #endif |
| 1027 | |
Glenn Randers-Pehrson | 39515c9 | 2010-08-28 06:21:35 -0500 | [diff] [blame] | 1028 | #ifdef PNG_16BIT_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1029 | #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1030 | PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, |
| 1031 | png_bytep row)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1032 | #endif |
Glenn Randers-Pehrson | 39515c9 | 2010-08-28 06:21:35 -0500 | [diff] [blame] | 1033 | #endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1034 | |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1035 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ |
| 1036 | defined(PNG_WRITE_PACKSWAP_SUPPORTED) |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1037 | PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, |
| 1038 | png_bytep row)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1039 | #endif |
| 1040 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1041 | #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1042 | PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, |
| 1043 | png_row_infop row_info, png_bytep row)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1044 | #endif |
| 1045 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1046 | #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1047 | PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1048 | png_bytep row)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1049 | #endif |
| 1050 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1051 | #ifdef PNG_READ_PACK_SUPPORTED |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1052 | PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, |
| 1053 | png_bytep row)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1054 | #endif |
| 1055 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1056 | #ifdef PNG_READ_SHIFT_SUPPORTED |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1057 | PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, |
| 1058 | png_bytep row, png_const_color_8p sig_bits)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1059 | #endif |
| 1060 | |
| 1061 | #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1062 | PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, |
| 1063 | png_bytep row)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1064 | #endif |
| 1065 | |
John Bowler | 8d26126 | 2011-06-18 13:37:11 -0500 | [diff] [blame] | 1066 | #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED |
John Bowler | 550bab0 | 2011-06-14 06:17:26 -0500 | [diff] [blame] | 1067 | PNG_EXTERN void png_do_scale_16_to_8 PNGARG((png_row_infop row_info, |
| 1068 | png_bytep row)); |
Glenn Randers-Pehrson | 5f0b927 | 2011-06-16 09:05:40 -0500 | [diff] [blame] | 1069 | #endif |
John Bowler | 550bab0 | 2011-06-14 06:17:26 -0500 | [diff] [blame] | 1070 | |
Glenn Randers-Pehrson | ab63dd0 | 2011-06-17 20:04:17 -0500 | [diff] [blame] | 1071 | #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1072 | PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, |
| 1073 | png_bytep row)); |
Glenn Randers-Pehrson | 2232baa | 2011-06-14 06:59:46 -0500 | [diff] [blame] | 1074 | #endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1075 | |
Glenn Randers-Pehrson | 3cd7cff | 2010-04-16 19:27:08 -0500 | [diff] [blame] | 1076 | #ifdef PNG_READ_QUANTIZE_SUPPORTED |
| 1077 | PNG_EXTERN void png_do_quantize PNGARG((png_row_infop row_info, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1078 | png_bytep row, png_const_bytep palette_lookup, |
| 1079 | png_const_bytep quantize_lookup)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1080 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1081 | # ifdef PNG_CORRECT_PALETTE_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1082 | PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1083 | png_colorp palette, int num_palette)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1084 | # endif |
| 1085 | #endif |
| 1086 | |
| 1087 | #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1088 | PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, |
| 1089 | png_bytep row)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1090 | #endif |
| 1091 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1092 | #ifdef PNG_WRITE_PACK_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1093 | PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info, |
| 1094 | png_bytep row, png_uint_32 bit_depth)); |
| 1095 | #endif |
| 1096 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1097 | #ifdef PNG_WRITE_SHIFT_SUPPORTED |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1098 | PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, |
| 1099 | png_bytep row, png_const_color_8p bit_depth)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1100 | #endif |
| 1101 | |
John Bowler | d273ad2 | 2011-05-07 21:00:28 -0500 | [diff] [blame] | 1102 | #if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\ |
| 1103 | defined(PNG_READ_ALPHA_MODE_SUPPORTED) |
| 1104 | PNG_EXTERN void png_do_compose PNGARG((png_row_infop row_info, |
John Bowler | 4a12f4a | 2011-04-17 18:34:22 -0500 | [diff] [blame] | 1105 | png_bytep row, png_structp png_ptr)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1106 | #endif |
| 1107 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1108 | #ifdef PNG_READ_GAMMA_SUPPORTED |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1109 | PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, |
John Bowler | 4a12f4a | 2011-04-17 18:34:22 -0500 | [diff] [blame] | 1110 | png_bytep row, png_structp png_ptr)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1111 | #endif |
| 1112 | |
John Bowler | d273ad2 | 2011-05-07 21:00:28 -0500 | [diff] [blame] | 1113 | #ifdef PNG_READ_ALPHA_MODE_SUPPORTED |
| 1114 | PNG_EXTERN void png_do_encode_alpha PNGARG((png_row_infop row_info, |
| 1115 | png_bytep row, png_structp png_ptr)); |
| 1116 | #endif |
| 1117 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1118 | #ifdef PNG_READ_EXPAND_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1119 | PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1120 | png_bytep row, png_const_colorp palette, png_const_bytep trans, |
| 1121 | int num_trans)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1122 | PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1123 | png_bytep row, png_const_color_16p trans_color)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1124 | #endif |
| 1125 | |
John Bowler | 4d56296 | 2011-02-12 09:01:20 -0600 | [diff] [blame] | 1126 | #ifdef PNG_READ_EXPAND_16_SUPPORTED |
| 1127 | PNG_EXTERN void png_do_expand_16 PNGARG((png_row_infop row_info, |
| 1128 | png_bytep row)); |
| 1129 | #endif |
| 1130 | |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1131 | /* The following decodes the appropriate chunks, and does error correction, |
| 1132 | * then calls the appropriate callback for the chunk if it is valid. |
| 1133 | */ |
| 1134 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1135 | /* Decode the IHDR chunk */ |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1136 | PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1137 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1138 | PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1139 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1140 | PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1141 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1142 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1143 | #ifdef PNG_READ_bKGD_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1144 | PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1145 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1146 | #endif |
| 1147 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1148 | #ifdef PNG_READ_cHRM_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1149 | PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1150 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1151 | #endif |
| 1152 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1153 | #ifdef PNG_READ_gAMA_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1154 | PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1155 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1156 | #endif |
| 1157 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1158 | #ifdef PNG_READ_hIST_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1159 | PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1160 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1161 | #endif |
| 1162 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1163 | #ifdef PNG_READ_iCCP_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1164 | PNG_EXTERN void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1165 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1166 | #endif /* PNG_READ_iCCP_SUPPORTED */ |
| 1167 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1168 | #ifdef PNG_READ_iTXt_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1169 | PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1170 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1171 | #endif |
| 1172 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1173 | #ifdef PNG_READ_oFFs_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1174 | PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1175 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1176 | #endif |
| 1177 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1178 | #ifdef PNG_READ_pCAL_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1179 | PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1180 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1181 | #endif |
| 1182 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1183 | #ifdef PNG_READ_pHYs_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1184 | PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1185 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1186 | #endif |
| 1187 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1188 | #ifdef PNG_READ_sBIT_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1189 | PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1190 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1191 | #endif |
| 1192 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1193 | #ifdef PNG_READ_sCAL_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1194 | PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1195 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1196 | #endif |
| 1197 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1198 | #ifdef PNG_READ_sPLT_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1199 | PNG_EXTERN void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1200 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1201 | #endif /* PNG_READ_sPLT_SUPPORTED */ |
| 1202 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1203 | #ifdef PNG_READ_sRGB_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1204 | PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1205 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1206 | #endif |
| 1207 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1208 | #ifdef PNG_READ_tEXt_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1209 | PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1210 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1211 | #endif |
| 1212 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1213 | #ifdef PNG_READ_tIME_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1214 | PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1215 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1216 | #endif |
| 1217 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1218 | #ifdef PNG_READ_tRNS_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1219 | PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1220 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1221 | #endif |
| 1222 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1223 | #ifdef PNG_READ_zTXt_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1224 | PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1225 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1226 | #endif |
| 1227 | |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 1228 | #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1229 | PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1230 | png_infop info_ptr, png_uint_32 length)); |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 1231 | #endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1232 | |
| 1233 | PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 1234 | png_uint_32 chunk_name)); |
| 1235 | |
| 1236 | #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED |
| 1237 | /* Exactly as png_handle_as_unknown() except that the argument is a 32-bit chunk |
| 1238 | * name, not a string. |
| 1239 | */ |
| 1240 | PNG_EXTERN int png_chunk_unknown_handling PNGARG((png_structp png_ptr, |
| 1241 | png_uint_32 chunk_name)); |
| 1242 | #endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1243 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1244 | /* Handle the transformations for reading and writing */ |
John Bowler | 4a12f4a | 2011-04-17 18:34:22 -0500 | [diff] [blame] | 1245 | #ifdef PNG_READ_TRANSFORMS_SUPPORTED |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 1246 | PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr, |
| 1247 | png_row_infop row_info)); |
John Bowler | 4a12f4a | 2011-04-17 18:34:22 -0500 | [diff] [blame] | 1248 | #endif |
| 1249 | #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED |
Glenn Randers-Pehrson | bb5cb14 | 2011-09-22 12:41:58 -0500 | [diff] [blame] | 1250 | PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr, |
| 1251 | png_row_infop row_info)); |
John Bowler | 4a12f4a | 2011-04-17 18:34:22 -0500 | [diff] [blame] | 1252 | #endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1253 | |
John Bowler | 4a12f4a | 2011-04-17 18:34:22 -0500 | [diff] [blame] | 1254 | #ifdef PNG_READ_TRANSFORMS_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1255 | PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr)); |
John Bowler | 4a12f4a | 2011-04-17 18:34:22 -0500 | [diff] [blame] | 1256 | #endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1257 | |
| 1258 | #ifdef PNG_PROGRESSIVE_READ_SUPPORTED |
| 1259 | PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1260 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1261 | PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1262 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1263 | PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr)); |
| 1264 | PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1265 | png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1266 | PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr)); |
| 1267 | PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr)); |
| 1268 | PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1269 | png_bytep buffer, png_size_t buffer_length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1270 | PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr)); |
| 1271 | PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1272 | png_bytep buffer, png_size_t buffer_length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1273 | PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr)); |
| 1274 | PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr, |
| 1275 | png_infop info_ptr, png_uint_32 length)); |
| 1276 | PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr, |
| 1277 | png_infop info_ptr)); |
| 1278 | PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr, |
| 1279 | png_infop info_ptr)); |
| 1280 | PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row)); |
| 1281 | PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1282 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1283 | PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1284 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1285 | PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr)); |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 1286 | # ifdef PNG_READ_tEXt_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1287 | PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1288 | png_infop info_ptr, png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1289 | PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1290 | png_infop info_ptr)); |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 1291 | # endif |
| 1292 | # ifdef PNG_READ_zTXt_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1293 | PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1294 | png_infop info_ptr, png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1295 | PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1296 | png_infop info_ptr)); |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 1297 | # endif |
| 1298 | # ifdef PNG_READ_iTXt_SUPPORTED |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1299 | PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1300 | png_infop info_ptr, png_uint_32 length)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1301 | PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1302 | png_infop info_ptr)); |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 1303 | # endif |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1304 | |
| 1305 | #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ |
| 1306 | |
| 1307 | #ifdef PNG_MNG_FEATURES_SUPPORTED |
| 1308 | PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1309 | png_bytep row)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1310 | PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1311 | png_bytep row)); |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1312 | #endif |
| 1313 | |
Glenn Randers-Pehrson | f783101 | 2008-11-13 06:05:13 -0600 | [diff] [blame] | 1314 | /* Added at libpng version 1.4.0 */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1315 | #ifdef PNG_CHECK_cHRM_SUPPORTED |
Glenn Randers-Pehrson | 134bbe4 | 2009-09-24 18:10:49 -0500 | [diff] [blame] | 1316 | PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1317 | png_fixed_point int_white_x, png_fixed_point int_white_y, |
| 1318 | png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point |
| 1319 | int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, |
| 1320 | png_fixed_point int_blue_y)); |
Glenn Randers-Pehrson | f783101 | 2008-11-13 06:05:13 -0600 | [diff] [blame] | 1321 | #endif |
Glenn Randers-Pehrson | f783101 | 2008-11-13 06:05:13 -0600 | [diff] [blame] | 1322 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1323 | #ifdef PNG_CHECK_cHRM_SUPPORTED |
Glenn Randers-Pehrson | 7ec330d | 2009-09-25 11:45:42 -0500 | [diff] [blame] | 1324 | /* Added at libpng version 1.2.34 and 1.4.0 */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1325 | /* Currently only used by png_check_cHRM_fixed */ |
Glenn Randers-Pehrson | 7ec330d | 2009-09-25 11:45:42 -0500 | [diff] [blame] | 1326 | PNG_EXTERN void png_64bit_product PNGARG((long v1, long v2, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1327 | unsigned long *hi_product, unsigned long *lo_product)); |
Glenn Randers-Pehrson | 7ec330d | 2009-09-25 11:45:42 -0500 | [diff] [blame] | 1328 | #endif |
| 1329 | |
John Bowler | 7b97965 | 2011-08-16 22:36:43 -0500 | [diff] [blame] | 1330 | #ifdef PNG_cHRM_SUPPORTED |
John Bowler | 9b979b1 | 2011-08-16 22:58:33 -0500 | [diff] [blame] | 1331 | /* Added at libpng version 1.5.5 */ |
| 1332 | typedef struct png_xy |
| 1333 | { |
| 1334 | png_fixed_point redx, redy; |
| 1335 | png_fixed_point greenx, greeny; |
| 1336 | png_fixed_point bluex, bluey; |
| 1337 | png_fixed_point whitex, whitey; |
| 1338 | } png_xy; |
| 1339 | |
| 1340 | typedef struct png_XYZ |
| 1341 | { |
| 1342 | png_fixed_point redX, redY, redZ; |
| 1343 | png_fixed_point greenX, greenY, greenZ; |
| 1344 | png_fixed_point blueX, blueY, blueZ; |
| 1345 | } png_XYZ; |
| 1346 | |
John Bowler | 736f40f | 2011-08-25 16:19:44 -0500 | [diff] [blame] | 1347 | /* The conversion APIs return 0 on success, non-zero on a parameter error. They |
| 1348 | * allow conversion between the above representations of a color encoding. When |
| 1349 | * converting from XYZ end points to chromaticities the absolute magnitude of |
| 1350 | * the end points is lost, when converting back the sum of the Y values of the |
| 1351 | * three end points will be 1.0 |
| 1352 | */ |
John Bowler | 9b979b1 | 2011-08-16 22:58:33 -0500 | [diff] [blame] | 1353 | PNG_EXTERN int png_xy_from_XYZ PNGARG((png_xy *xy, png_XYZ XYZ)); |
| 1354 | PNG_EXTERN int png_XYZ_from_xy PNGARG((png_XYZ *XYZ, png_xy xy)); |
| 1355 | PNG_EXTERN int png_XYZ_from_xy_checked PNGARG((png_structp png_ptr, |
| 1356 | png_XYZ *XYZ, png_xy xy)); |
| 1357 | #endif |
| 1358 | |
Glenn Randers-Pehrson | 134bbe4 | 2009-09-24 18:10:49 -0500 | [diff] [blame] | 1359 | /* Added at libpng version 1.4.0 */ |
| 1360 | PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1361 | png_uint_32 width, png_uint_32 height, int bit_depth, |
| 1362 | int color_type, int interlace_type, int compression_type, |
| 1363 | int filter_type)); |
Glenn Randers-Pehrson | 134bbe4 | 2009-09-24 18:10:49 -0500 | [diff] [blame] | 1364 | |
Glenn Randers-Pehrson | d29033f | 2009-11-07 10:46:42 -0600 | [diff] [blame] | 1365 | /* Free all memory used by the read (old method - NOT DLL EXPORTED) */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1366 | PNG_EXTERN void png_read_destroy PNGARG((png_structp png_ptr, |
| 1367 | png_infop info_ptr, png_infop end_info_ptr)); |
Glenn Randers-Pehrson | d29033f | 2009-11-07 10:46:42 -0600 | [diff] [blame] | 1368 | |
| 1369 | /* Free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1370 | PNG_EXTERN void png_write_destroy PNGARG((png_structp png_ptr)); |
Glenn Randers-Pehrson | d29033f | 2009-11-07 10:46:42 -0600 | [diff] [blame] | 1371 | |
| 1372 | #ifdef USE_FAR_KEYWORD /* memory model conversion function */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1373 | PNG_EXTERN void *png_far_to_near PNGARG((png_structp png_ptr, png_voidp ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1374 | int check)); |
Glenn Randers-Pehrson | d29033f | 2009-11-07 10:46:42 -0600 | [diff] [blame] | 1375 | #endif /* USE_FAR_KEYWORD */ |
| 1376 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1377 | #if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED) |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame] | 1378 | PNG_EXTERN PNG_FUNCTION(void, png_fixed_error, (png_structp png_ptr, |
| 1379 | png_const_charp name),PNG_NORETURN); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1380 | #endif |
| 1381 | |
John Bowler | 88b77cc | 2011-05-05 06:49:55 -0500 | [diff] [blame] | 1382 | /* Puts 'string' into 'buffer' at buffer[pos], taking care never to overwrite |
| 1383 | * the end. Always leaves the buffer nul terminated. Never errors out (and |
| 1384 | * there is no error code.) |
| 1385 | */ |
| 1386 | PNG_EXTERN size_t png_safecat(png_charp buffer, size_t bufsize, size_t pos, |
| 1387 | png_const_charp string); |
| 1388 | |
John Bowler | c5bef94 | 2011-05-05 17:35:39 -0500 | [diff] [blame] | 1389 | /* Various internal functions to handle formatted warning messages, currently |
| 1390 | * only implemented for warnings. |
| 1391 | */ |
| 1392 | #if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_TIME_RFC1123_SUPPORTED) |
John Bowler | 88b77cc | 2011-05-05 06:49:55 -0500 | [diff] [blame] | 1393 | /* Utility to dump an unsigned value into a buffer, given a start pointer and |
| 1394 | * and end pointer (which should point just *beyond* the end of the buffer!) |
| 1395 | * Returns the pointer to the start of the formatted string. This utility only |
| 1396 | * does unsigned values. |
| 1397 | */ |
| 1398 | PNG_EXTERN png_charp png_format_number(png_const_charp start, png_charp end, |
| 1399 | int format, png_alloc_size_t number); |
| 1400 | |
| 1401 | /* Convenience macro that takes an array: */ |
| 1402 | #define PNG_FORMAT_NUMBER(buffer,format,number) \ |
| 1403 | png_format_number(buffer, buffer + (sizeof buffer), format, number) |
| 1404 | |
| 1405 | /* Suggested size for a number buffer (enough for 64 bits and a sign!) */ |
| 1406 | #define PNG_NUMBER_BUFFER_SIZE 24 |
| 1407 | |
| 1408 | /* These are the integer formats currently supported, the name is formed from |
| 1409 | * the standard printf(3) format string. |
| 1410 | */ |
| 1411 | #define PNG_NUMBER_FORMAT_u 1 /* chose unsigned API! */ |
| 1412 | #define PNG_NUMBER_FORMAT_02u 2 |
| 1413 | #define PNG_NUMBER_FORMAT_d 1 /* chose signed API! */ |
| 1414 | #define PNG_NUMBER_FORMAT_02d 2 |
| 1415 | #define PNG_NUMBER_FORMAT_x 3 |
| 1416 | #define PNG_NUMBER_FORMAT_02x 4 |
| 1417 | #define PNG_NUMBER_FORMAT_fixed 5 /* choose the signed API */ |
| 1418 | #endif |
| 1419 | |
| 1420 | #ifdef PNG_WARNINGS_SUPPORTED |
Glenn Randers-Pehrson | ef217b7 | 2011-06-15 12:58:27 -0500 | [diff] [blame] | 1421 | /* New defines and members adding in libpng-1.5.4 */ |
John Bowler | 88b77cc | 2011-05-05 06:49:55 -0500 | [diff] [blame] | 1422 | # define PNG_WARNING_PARAMETER_SIZE 32 |
| 1423 | # define PNG_WARNING_PARAMETER_COUNT 8 |
| 1424 | |
| 1425 | /* An l-value of this type has to be passed to the APIs below to cache the |
| 1426 | * values of the parameters to a formatted warning message. |
| 1427 | */ |
| 1428 | typedef char png_warning_parameters[PNG_WARNING_PARAMETER_COUNT][ |
| 1429 | PNG_WARNING_PARAMETER_SIZE]; |
| 1430 | |
| 1431 | PNG_EXTERN void png_warning_parameter(png_warning_parameters p, int number, |
| 1432 | png_const_charp string); |
| 1433 | /* Parameters are limited in size to PNG_WARNING_PARAMETER_SIZE characters, |
| 1434 | * including the trailing '\0'. |
| 1435 | */ |
| 1436 | PNG_EXTERN void png_warning_parameter_unsigned(png_warning_parameters p, |
| 1437 | int number, int format, png_alloc_size_t value); |
| 1438 | /* Use png_alloc_size_t because it is an unsigned type as big as any we |
| 1439 | * need to output. Use the following for a signed value. |
| 1440 | */ |
| 1441 | PNG_EXTERN void png_warning_parameter_signed(png_warning_parameters p, |
| 1442 | int number, int format, png_int_32 value); |
| 1443 | |
| 1444 | PNG_EXTERN void png_formatted_warning(png_structp png_ptr, |
| 1445 | png_warning_parameters p, png_const_charp message); |
| 1446 | /* 'message' follows the X/Open approach of using @1, @2 to insert |
| 1447 | * parameters previously supplied using the above functions. Errors in |
| 1448 | * specifying the paramters will simple result in garbage substitutions. |
| 1449 | */ |
| 1450 | #endif |
| 1451 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1452 | /* ASCII to FP interfaces, currently only implemented if sCAL |
| 1453 | * support is required. |
| 1454 | */ |
Glenn Randers-Pehrson | 48dc6eb | 2010-07-31 07:09:58 -0500 | [diff] [blame] | 1455 | #if defined(PNG_READ_sCAL_SUPPORTED) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1456 | /* MAX_DIGITS is actually the maximum number of characters in an sCAL |
| 1457 | * width or height, derived from the precision (number of significant |
| 1458 | * digits - a build time settable option) and assumpitions about the |
| 1459 | * maximum ridiculous exponent. |
| 1460 | */ |
| 1461 | #define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/) |
Glenn Randers-Pehrson | 48dc6eb | 2010-07-31 07:09:58 -0500 | [diff] [blame] | 1462 | |
| 1463 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
Glenn Randers-Pehrson | 2be8b64 | 2010-07-29 19:09:18 -0500 | [diff] [blame] | 1464 | PNG_EXTERN void png_ascii_from_fp PNGARG((png_structp png_ptr, png_charp ascii, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1465 | png_size_t size, double fp, unsigned int precision)); |
Glenn Randers-Pehrson | 48dc6eb | 2010-07-31 07:09:58 -0500 | [diff] [blame] | 1466 | #endif /* FLOATING_POINT */ |
| 1467 | |
| 1468 | #ifdef PNG_FIXED_POINT_SUPPORTED |
| 1469 | PNG_EXTERN void png_ascii_from_fixed PNGARG((png_structp png_ptr, |
| 1470 | png_charp ascii, png_size_t size, png_fixed_point fp)); |
| 1471 | #endif /* FIXED_POINT */ |
| 1472 | #endif /* READ_sCAL */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1473 | |
| 1474 | #if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED) |
| 1475 | /* An internal API to validate the format of a floating point number. |
| 1476 | * The result is the index of the next character. If the number is |
| 1477 | * not valid it will be the index of a character in the supposed number. |
| 1478 | * |
| 1479 | * The format of a number is defined in the PNG extensions specification |
| 1480 | * and this API is strictly conformant to that spec, not anyone elses! |
| 1481 | * |
| 1482 | * The format as a regular expression is: |
| 1483 | * |
| 1484 | * [+-]?[0-9]+.?([Ee][+-]?[0-9]+)? |
| 1485 | * |
| 1486 | * or: |
| 1487 | * |
| 1488 | * [+-]?.[0-9]+(.[0-9]+)?([Ee][+-]?[0-9]+)? |
| 1489 | * |
| 1490 | * The complexity is that either integer or fraction must be present and the |
| 1491 | * fraction is permitted to have no digits only if the integer is present. |
| 1492 | * |
| 1493 | * NOTE: The dangling E problem. |
| 1494 | * There is a PNG valid floating point number in the following: |
| 1495 | * |
| 1496 | * PNG floating point numb1.ers are not greedy. |
| 1497 | * |
| 1498 | * Working this out requires *TWO* character lookahead (because of the |
| 1499 | * sign), the parser does not do this - it will fail at the 'r' - this |
| 1500 | * doesn't matter for PNG sCAL chunk values, but it requires more care |
| 1501 | * if the value were ever to be embedded in something more complex. Use |
| 1502 | * ANSI-C strtod if you need the lookahead. |
| 1503 | */ |
| 1504 | /* State table for the parser. */ |
| 1505 | #define PNG_FP_INTEGER 0 /* before or in integer */ |
| 1506 | #define PNG_FP_FRACTION 1 /* before or in fraction */ |
| 1507 | #define PNG_FP_EXPONENT 2 /* before or in exponent */ |
| 1508 | #define PNG_FP_STATE 3 /* mask for the above */ |
| 1509 | #define PNG_FP_SAW_SIGN 4 /* Saw +/- in current state */ |
| 1510 | #define PNG_FP_SAW_DIGIT 8 /* Saw a digit in current state */ |
| 1511 | #define PNG_FP_SAW_DOT 16 /* Saw a dot in current state */ |
| 1512 | #define PNG_FP_SAW_E 32 /* Saw an E (or e) in current state */ |
| 1513 | #define PNG_FP_SAW_ANY 60 /* Saw any of the above 4 */ |
John Bowler | 8d26126 | 2011-06-18 13:37:11 -0500 | [diff] [blame] | 1514 | |
| 1515 | /* These three values don't affect the parser. They are set but not used. |
| 1516 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1517 | #define PNG_FP_WAS_VALID 64 /* Preceding substring is a valid fp number */ |
John Bowler | 8d26126 | 2011-06-18 13:37:11 -0500 | [diff] [blame] | 1518 | #define PNG_FP_NEGATIVE 128 /* A negative number, including "-0" */ |
| 1519 | #define PNG_FP_NONZERO 256 /* A non-zero value */ |
| 1520 | #define PNG_FP_STICKY 448 /* The above three flags */ |
| 1521 | |
| 1522 | /* This is available for the caller to store in 'state' if required. Do not |
| 1523 | * call the parser after setting it (the parser sometimes clears it.) |
| 1524 | */ |
| 1525 | #define PNG_FP_INVALID 512 /* Available for callers as a distinct value */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1526 | |
| 1527 | /* Result codes for the parser (boolean - true meants ok, false means |
| 1528 | * not ok yet.) |
| 1529 | */ |
| 1530 | #define PNG_FP_MAYBE 0 /* The number may be valid in the future */ |
| 1531 | #define PNG_FP_OK 1 /* The number is valid */ |
| 1532 | |
John Bowler | 8d26126 | 2011-06-18 13:37:11 -0500 | [diff] [blame] | 1533 | /* Tests on the sticky non-zero and negative flags. To pass these checks |
| 1534 | * the state must also indicate that the whole number is valid - this is |
| 1535 | * achieved by testing PNG_FP_SAW_DIGIT (see the implementation for why this |
| 1536 | * is equivalent to PNG_FP_OK above.) |
| 1537 | */ |
| 1538 | #define PNG_FP_NZ_MASK (PNG_FP_SAW_DIGIT | PNG_FP_NEGATIVE | PNG_FP_NONZERO) |
| 1539 | /* NZ_MASK: the string is valid and a non-zero negative value */ |
| 1540 | #define PNG_FP_Z_MASK (PNG_FP_SAW_DIGIT | PNG_FP_NONZERO) |
| 1541 | /* Z MASK: the string is valid and a non-zero value. */ |
| 1542 | /* PNG_FP_SAW_DIGIT: the string is valid. */ |
| 1543 | #define PNG_FP_IS_ZERO(state) (((state) & PNG_FP_Z_MASK) == PNG_FP_SAW_DIGIT) |
| 1544 | #define PNG_FP_IS_POSITIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_Z_MASK) |
| 1545 | #define PNG_FP_IS_NEGATIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_NZ_MASK) |
| 1546 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1547 | /* The actual parser. This can be called repeatedly, it updates |
| 1548 | * the index into the string and the state variable (which must |
| 1549 | * be initialzed to 0). It returns a result code, as above. There |
| 1550 | * is no point calling the parser any more if it fails to advance to |
| 1551 | * the end of the string - it is stuck on an invalid character (or |
| 1552 | * terminated by '\0'). |
| 1553 | * |
| 1554 | * Note that the pointer will consume an E or even an E+ then leave |
| 1555 | * a 'maybe' state even though a preceding integer.fraction is valid. |
| 1556 | * The PNG_FP_WAS_VALID flag indicates that a preceding substring was |
| 1557 | * a valid number. It's possible to recover from this by calling |
| 1558 | * the parser again (from the start, with state 0) but with a string |
| 1559 | * that omits the last character (i.e. set the size to the index of |
| 1560 | * the problem character.) This has not been tested within libpng. |
| 1561 | */ |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1562 | PNG_EXTERN int png_check_fp_number PNGARG((png_const_charp string, |
| 1563 | png_size_t size, int *statep, png_size_tp whereami)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1564 | |
| 1565 | /* This is the same but it checks a complete string and returns true |
John Bowler | 8d26126 | 2011-06-18 13:37:11 -0500 | [diff] [blame] | 1566 | * only if it just contains a floating point number. As of 1.5.4 this |
| 1567 | * function also returns the state at the end of parsing the number if |
| 1568 | * it was valid (otherwise it returns 0.) This can be used for testing |
| 1569 | * for negative or zero values using the sticky flag. |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1570 | */ |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1571 | PNG_EXTERN int png_check_fp_string PNGARG((png_const_charp string, |
| 1572 | png_size_t size)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1573 | #endif /* pCAL || sCAL */ |
| 1574 | |
Glenn Randers-Pehrson | 48dc6eb | 2010-07-31 07:09:58 -0500 | [diff] [blame] | 1575 | #if defined(PNG_READ_GAMMA_SUPPORTED) ||\ |
| 1576 | defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1577 | /* Added at libpng version 1.5.0 */ |
| 1578 | /* This is a utility to provide a*times/div (rounded) and indicate |
| 1579 | * if there is an overflow. The result is a boolean - false (0) |
| 1580 | * for overflow, true (1) if no overflow, in which case *res |
| 1581 | * holds the result. |
| 1582 | */ |
| 1583 | PNG_EXTERN int png_muldiv PNGARG((png_fixed_point_p res, png_fixed_point a, |
Glenn Randers-Pehrson | 8625b39 | 2011-02-03 21:43:38 -0600 | [diff] [blame] | 1584 | png_int_32 multiplied_by, png_int_32 divided_by)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1585 | #endif |
| 1586 | |
| 1587 | #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED) |
| 1588 | /* Same deal, but issue a warning on overflow and return 0. */ |
| 1589 | PNG_EXTERN png_fixed_point png_muldiv_warn PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | 8625b39 | 2011-02-03 21:43:38 -0600 | [diff] [blame] | 1590 | png_fixed_point a, png_int_32 multiplied_by, png_int_32 divided_by)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1591 | #endif |
| 1592 | |
| 1593 | #ifdef PNG_READ_GAMMA_SUPPORTED |
| 1594 | /* Calculate a reciprocal - used for gamma values. This returns |
| 1595 | * 0 if the argument is 0 in order to maintain an undefined value, |
| 1596 | * there are no warnings. |
| 1597 | */ |
| 1598 | PNG_EXTERN png_fixed_point png_reciprocal PNGARG((png_fixed_point a)); |
| 1599 | |
| 1600 | /* The same but gives a reciprocal of the product of two fixed point |
| 1601 | * values. Accuracy is suitable for gamma calculations but this is |
| 1602 | * not exact - use png_muldiv for that. |
| 1603 | */ |
| 1604 | PNG_EXTERN png_fixed_point png_reciprocal2 PNGARG((png_fixed_point a, |
| 1605 | png_fixed_point b)); |
| 1606 | #endif |
| 1607 | |
| 1608 | #ifdef PNG_READ_GAMMA_SUPPORTED |
| 1609 | /* Internal fixed point gamma correction. These APIs are called as |
| 1610 | * required to convert single values - they don't need to be fast, |
| 1611 | * they are not used when processing image pixel values. |
| 1612 | * |
| 1613 | * While the input is an 'unsigned' value it must actually be the |
| 1614 | * correct bit value - 0..255 or 0..65535 as required. |
| 1615 | */ |
| 1616 | PNG_EXTERN png_uint_16 png_gamma_correct PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | 8625b39 | 2011-02-03 21:43:38 -0600 | [diff] [blame] | 1617 | unsigned int value, png_fixed_point gamma_value)); |
| 1618 | PNG_EXTERN int png_gamma_significant PNGARG((png_fixed_point gamma_value)); |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1619 | PNG_EXTERN png_uint_16 png_gamma_16bit_correct PNGARG((unsigned int value, |
Glenn Randers-Pehrson | 8625b39 | 2011-02-03 21:43:38 -0600 | [diff] [blame] | 1620 | png_fixed_point gamma_value)); |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1621 | PNG_EXTERN png_byte png_gamma_8bit_correct PNGARG((unsigned int value, |
Glenn Randers-Pehrson | 8625b39 | 2011-02-03 21:43:38 -0600 | [diff] [blame] | 1622 | png_fixed_point gamma_value)); |
John Bowler | 07772cb | 2011-10-14 18:19:47 -0500 | [diff] [blame] | 1623 | PNG_EXTERN void png_destroy_gamma_table(png_structp png_ptr); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1624 | PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr, |
Glenn Randers-Pehrson | 67439c4 | 2010-08-19 07:01:09 -0500 | [diff] [blame] | 1625 | int bit_depth)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1626 | #endif |
Glenn Randers-Pehrson | d29033f | 2009-11-07 10:46:42 -0600 | [diff] [blame] | 1627 | |
John Bowler | 7875d53 | 2011-11-07 22:33:49 -0600 | [diff] [blame^] | 1628 | /* SIMPLIFIED READ/WRITE SUPPORT */ |
| 1629 | #if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\ |
| 1630 | defined PNG_SIMPLIFIED_WRITE_SUPPORTED |
| 1631 | /* The internal structure that png_image::opaque points to. */ |
| 1632 | typedef struct png_control |
| 1633 | { |
| 1634 | png_structp png_ptr; |
| 1635 | png_infop info_ptr; |
| 1636 | png_voidp error_buf; /* Always a jmp_buf at present. */ |
| 1637 | |
| 1638 | png_const_bytep memory; /* Memory buffer. */ |
| 1639 | png_size_t size; /* Size of the memory buffer. */ |
| 1640 | |
| 1641 | unsigned int for_write :1; /* Otherwise it is a read structure */ |
| 1642 | unsigned int owned_file :1; /* We own the file in io_ptr */ |
| 1643 | } png_control; |
| 1644 | |
| 1645 | /* Utility to safely execute a piece of libpng code catching and logging any |
| 1646 | * errors that might occur. Returns true on success, false on failure (either |
| 1647 | * of the function or as a result of a png_error.) |
| 1648 | */ |
| 1649 | PNG_FUNCTION(void, png_safe_error, (png_structp png_ptr, |
| 1650 | png_const_charp error_message), PNG_NORETURN); |
| 1651 | |
| 1652 | #ifdef PNG_WARNINGS_SUPPORTED |
| 1653 | PNG_EXTERN void png_safe_warning(png_structp png_ptr, |
| 1654 | png_const_charp warning_message); |
| 1655 | #else |
| 1656 | # define png_safe_warning 0/*dummy argument*/ |
| 1657 | #endif |
| 1658 | |
| 1659 | PNG_EXTERN int png_safe_execute PNGARG((png_imagep image, |
| 1660 | int (*function)(png_voidp), png_voidp arg)); |
| 1661 | |
| 1662 | /* Utility to log an error, this also cleans up the png_image, the function |
| 1663 | * always returns 0 (false). |
| 1664 | */ |
| 1665 | PNG_EXTERN int png_image_error(png_imagep image, png_const_charp error_message); |
| 1666 | |
| 1667 | #endif /* SIMPLIFIED READ/WRITE */ |
| 1668 | |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1669 | /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ |
| 1670 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1671 | |
| 1672 | #include "pngdebug.h" |
| 1673 | |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 1674 | #ifdef __cplusplus |
| 1675 | } |
| 1676 | #endif |
| 1677 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 1678 | #endif /* PNGPRIV_H */ |