Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2 | /* png.h - header file for PNG reference library |
| 3 | * |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 4 | * libpng version 1.6.19, November 12, 2015 |
| 5 | * |
| 6 | * Copyright (c) 1998-2015 Glenn Randers-Pehrson |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 7 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
| 8 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
| 9 | * |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 10 | * This code is released under the libpng license (See LICENSE, below) |
| 11 | * |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 12 | * Authors and maintainers: |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 13 | * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 14 | * libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger |
| 15 | * libpng versions 0.97, January 1998, through 1.6.19, November 12, 2015: Glenn |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 16 | * See also "Contributing Authors", below. |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 17 | */ |
| 18 | |
| 19 | /* |
| 20 | * COPYRIGHT NOTICE, DISCLAIMER, and LICENSE: |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 21 | * |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 22 | * If you modify libpng you may insert additional notices immediately following |
| 23 | * this sentence. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 24 | * |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 25 | * This code is released under the libpng license. |
| 26 | * |
| 27 | * libpng versions 1.0.7, July 1, 2000, through 1.6.19, November 12, 2015, are |
| 28 | * Copyright (c) 2000-2002, 2004, 2006-2015 Glenn Randers-Pehrson, are |
| 29 | * derived from libpng-1.0.6, and are distributed according to the same |
| 30 | * disclaimer and license as libpng-1.0.6 with the following individuals |
| 31 | * added to the list of Contributing Authors: |
| 32 | * |
| 33 | * Simon-Pierre Cadieux |
| 34 | * Eric S. Raymond |
| 35 | * Mans Rullgard |
| 36 | * Cosmin Truta |
| 37 | * Gilles Vollant |
| 38 | * James Yu |
| 39 | * |
| 40 | * and with the following additions to the disclaimer: |
| 41 | * |
| 42 | * There is no warranty against interference with your enjoyment of the |
| 43 | * library or against infringement. There is no warranty that our |
| 44 | * efforts or the library will fulfill any of your particular purposes |
| 45 | * or needs. This library is provided with all faults, and the entire |
| 46 | * risk of satisfactory quality, performance, accuracy, and effort is with |
| 47 | * the user. |
| 48 | * |
| 49 | * libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are |
| 50 | * Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from |
| 51 | * libpng-0.96, and are distributed according to the same disclaimer and |
| 52 | * license as libpng-0.96, with the following individuals added to the list |
| 53 | * of Contributing Authors: |
| 54 | * |
| 55 | * Tom Lane |
| 56 | * Glenn Randers-Pehrson |
| 57 | * Willem van Schaik |
| 58 | * |
| 59 | * libpng versions 0.89, June 1996, through 0.96, May 1997, are |
| 60 | * Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88, |
| 61 | * and are distributed according to the same disclaimer and license as |
| 62 | * libpng-0.88, with the following individuals added to the list of |
| 63 | * Contributing Authors: |
| 64 | * |
| 65 | * John Bowler |
| 66 | * Kevin Bracey |
| 67 | * Sam Bushell |
| 68 | * Magnus Holmgren |
| 69 | * Greg Roelofs |
| 70 | * Tom Tanner |
| 71 | * |
| 72 | * libpng versions 0.5, May 1995, through 0.88, January 1996, are |
| 73 | * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc. |
| 74 | * |
| 75 | * For the purposes of this copyright and license, "Contributing Authors" |
| 76 | * is defined as the following set of individuals: |
| 77 | * |
| 78 | * Andreas Dilger |
| 79 | * Dave Martindale |
| 80 | * Guy Eric Schalnat |
| 81 | * Paul Schmidt |
| 82 | * Tim Wegner |
| 83 | * |
| 84 | * The PNG Reference Library is supplied "AS IS". The Contributing Authors |
| 85 | * and Group 42, Inc. disclaim all warranties, expressed or implied, |
| 86 | * including, without limitation, the warranties of merchantability and of |
| 87 | * fitness for any purpose. The Contributing Authors and Group 42, Inc. |
| 88 | * assume no liability for direct, indirect, incidental, special, exemplary, |
| 89 | * or consequential damages, which may result from the use of the PNG |
| 90 | * Reference Library, even if advised of the possibility of such damage. |
| 91 | * |
| 92 | * Permission is hereby granted to use, copy, modify, and distribute this |
| 93 | * source code, or portions hereof, for any purpose, without fee, subject |
| 94 | * to the following restrictions: |
| 95 | * |
| 96 | * 1. The origin of this source code must not be misrepresented. |
| 97 | * |
| 98 | * 2. Altered versions must be plainly marked as such and must not |
| 99 | * be misrepresented as being the original source. |
| 100 | * |
| 101 | * 3. This Copyright notice may not be removed or altered from any |
| 102 | * source or altered source distribution. |
| 103 | * |
| 104 | * The Contributing Authors and Group 42, Inc. specifically permit, without |
| 105 | * fee, and encourage the use of this source code as a component to |
| 106 | * supporting the PNG file format in commercial products. If you use this |
| 107 | * source code in a product, acknowledgment is not required but would be |
| 108 | * appreciated. |
| 109 | * |
| 110 | * END OF COPYRIGHT NOTICE, DISCLAIMER, and LICENSE. |
| 111 | */ |
| 112 | |
| 113 | /* |
| 114 | * A "png_get_copyright" function is available, for convenient use in "about" |
| 115 | * boxes and the like: |
| 116 | * |
| 117 | * printf("%s", png_get_copyright(NULL)); |
| 118 | * |
| 119 | * Also, the PNG logo (in PNG format, of course) is supplied in the |
| 120 | * files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31). |
| 121 | */ |
| 122 | |
| 123 | /* |
| 124 | * Libpng is OSI Certified Open Source Software. OSI Certified Open Source is |
| 125 | * a certification mark of the Open Source Initiative. OSI has not addressed |
| 126 | * the additional disclaimers inserted at version 1.0.7. |
| 127 | */ |
| 128 | |
| 129 | /* |
| 130 | * The contributing authors would like to thank all those who helped |
| 131 | * with testing, bug fixes, and patience. This wouldn't have been |
| 132 | * possible without all of you. |
| 133 | * |
| 134 | * Thanks to Frank J. T. Wojcik for helping with the documentation. |
| 135 | */ |
| 136 | |
| 137 | /* Note about libpng version numbers: |
| 138 | * |
| 139 | * Due to various miscommunications, unforeseen code incompatibilities |
| 140 | * and occasional factors outside the authors' control, version numbering |
| 141 | * on the library has not always been consistent and straightforward. |
| 142 | * The following table summarizes matters since version 0.89c, which was |
| 143 | * the first widely used release: |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 144 | * |
| 145 | * source png.h png.h shared-lib |
| 146 | * version string int version |
| 147 | * ------- ------ ----- ---------- |
| 148 | * 0.89c "1.0 beta 3" 0.89 89 1.0.89 |
| 149 | * 0.90 "1.0 beta 4" 0.90 90 0.90 [should have been 2.0.90] |
| 150 | * 0.95 "1.0 beta 5" 0.95 95 0.95 [should have been 2.0.95] |
| 151 | * 0.96 "1.0 beta 6" 0.96 96 0.96 [should have been 2.0.96] |
| 152 | * 0.97b "1.00.97 beta 7" 1.00.97 97 1.0.1 [should have been 2.0.97] |
| 153 | * 0.97c 0.97 97 2.0.97 |
| 154 | * 0.98 0.98 98 2.0.98 |
| 155 | * 0.99 0.99 98 2.0.99 |
| 156 | * 0.99a-m 0.99 99 2.0.99 |
| 157 | * 1.00 1.00 100 2.1.0 [100 should be 10000] |
| 158 | * 1.0.0 (from here on, the 100 2.1.0 [100 should be 10000] |
| 159 | * 1.0.1 png.h string is 10001 2.1.0 |
| 160 | * 1.0.1a-e identical to the 10002 from here on, the shared library |
| 161 | * 1.0.2 source version) 10002 is 2.V where V is the source code |
| 162 | * 1.0.2a-b 10003 version, except as noted. |
| 163 | * 1.0.3 10003 |
| 164 | * 1.0.3a-d 10004 |
| 165 | * 1.0.4 10004 |
| 166 | * 1.0.4a-f 10005 |
| 167 | * 1.0.5 (+ 2 patches) 10005 |
| 168 | * 1.0.5a-d 10006 |
| 169 | * 1.0.5e-r 10100 (not source compatible) |
| 170 | * 1.0.5s-v 10006 (not binary compatible) |
| 171 | * 1.0.6 (+ 3 patches) 10006 (still binary incompatible) |
| 172 | * 1.0.6d-f 10007 (still binary incompatible) |
| 173 | * 1.0.6g 10007 |
| 174 | * 1.0.6h 10007 10.6h (testing xy.z so-numbering) |
| 175 | * 1.0.6i 10007 10.6i |
| 176 | * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0) |
| 177 | * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible) |
| 178 | * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible) |
| 179 | * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible) |
| 180 | * 1.0.7 1 10007 (still compatible) |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 181 | * ... |
| 182 | * 1.0.19 10 10019 10.so.0.19[.0] |
| 183 | * ... |
| 184 | * 1.2.53 13 10253 12.so.0.53[.0] |
| 185 | * ... |
| 186 | * 1.5.23 15 10523 15.so.15.23[.0] |
| 187 | * ... |
| 188 | * 1.6.19 16 10619 16.so.16.19[.0] |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 189 | * |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 190 | * Henceforth the source version will match the shared-library major |
| 191 | * and minor numbers; the shared-library major version number will be |
| 192 | * used for changes in backward compatibility, as it is intended. The |
| 193 | * PNG_LIBPNG_VER macro, which is not used within libpng but is available |
| 194 | * for applications, is an unsigned integer of the form xyyzz corresponding |
| 195 | * to the source version x.y.z (leading zeros in y and z). Beta versions |
| 196 | * were given the previous public release number plus a letter, until |
| 197 | * version 1.0.6j; from then on they were given the upcoming public |
| 198 | * release number plus "betaNN" or "rcNN". |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 199 | * |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 200 | * Binary incompatibility exists only when applications make direct access |
| 201 | * to the info_ptr or png_ptr members through png.h, and the compiled |
| 202 | * application is loaded with a different version of the library. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 203 | * |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 204 | * DLLNUM will change each time there are forward or backward changes |
| 205 | * in binary compatibility (e.g., when a new feature is added). |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 206 | * |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 207 | * See libpng.txt or libpng.3 for more information. The PNG specification |
| 208 | * is available as a W3C Recommendation and as an ISO Specification, |
| 209 | * <http://www.w3.org/TR/2003/REC-PNG-20031110/ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 210 | */ |
| 211 | |
| 212 | /* |
| 213 | * Y2K compliance in libpng: |
| 214 | * ========================= |
| 215 | * |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 216 | * November 12, 2015 |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 217 | * |
| 218 | * Since the PNG Development group is an ad-hoc body, we can't make |
| 219 | * an official declaration. |
| 220 | * |
| 221 | * This is your unofficial assurance that libpng from version 0.71 and |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 222 | * upward through 1.6.19 are Y2K compliant. It is my belief that |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 223 | * earlier versions were also Y2K compliant. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 224 | * |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 225 | * Libpng only has two year fields. One is a 2-byte unsigned integer |
| 226 | * that will hold years up to 65535. The other, which is deprecated, |
| 227 | * holds the date in text format, and will hold years up to 9999. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 228 | * |
| 229 | * The integer is |
| 230 | * "png_uint_16 year" in png_time_struct. |
| 231 | * |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 232 | * The string is |
| 233 | * "char time_buffer[29]" in png_struct. This is no longer used |
| 234 | * in libpng-1.6.x and will be removed from libpng-1.7.0. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 235 | * |
| 236 | * There are seven time-related functions: |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 237 | * png.c: png_convert_to_rfc_1123_buffer() in png.c |
| 238 | * (formerly png_convert_to_rfc_1123() prior to libpng-1.5.x and |
| 239 | * png_convert_to_rfc_1152() in error prior to libpng-0.98) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 240 | * png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c |
| 241 | * png_convert_from_time_t() in pngwrite.c |
| 242 | * png_get_tIME() in pngget.c |
| 243 | * png_handle_tIME() in pngrutil.c, called in pngread.c |
| 244 | * png_set_tIME() in pngset.c |
| 245 | * png_write_tIME() in pngwutil.c, called in pngwrite.c |
| 246 | * |
| 247 | * All handle dates properly in a Y2K environment. The |
| 248 | * png_convert_from_time_t() function calls gmtime() to convert from system |
| 249 | * clock time, which returns (year - 1900), which we properly convert to |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 250 | * the full 4-digit year. There is a possibility that libpng applications |
| 251 | * are not passing 4-digit years into the png_convert_to_rfc_1123_buffer() |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 252 | * function, or that they are incorrectly passing only a 2-digit year |
| 253 | * instead of "year - 1900" into the png_convert_from_struct_tm() function, |
| 254 | * but this is not under our control. The libpng documentation has always |
| 255 | * stated that it works with 4-digit years, and the APIs have been |
| 256 | * documented as such. |
| 257 | * |
| 258 | * The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned |
| 259 | * integer to hold the year, and can hold years as large as 65535. |
| 260 | * |
| 261 | * zlib, upon which libpng depends, is also Y2K compliant. It contains |
| 262 | * no date-related code. |
| 263 | * |
| 264 | * Glenn Randers-Pehrson |
| 265 | * libpng maintainer |
| 266 | * PNG Development Group |
| 267 | */ |
| 268 | |
| 269 | #ifndef PNG_H |
| 270 | #define PNG_H |
| 271 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 272 | /* This is not the place to learn how to use libpng. The file libpng-manual.txt |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 273 | * describes how to use libpng, and the file example.c summarizes it |
| 274 | * with some code on which to build. This file is useful for looking |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 275 | * at the actual function definitions and structure components. If that |
| 276 | * file has been stripped from your copy of libpng, you can find it at |
| 277 | * <http://www.libpng.org/pub/png/libpng-manual.txt> |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 278 | * |
| 279 | * If you just need to read a PNG file and don't want to read the documentation |
| 280 | * skip to the end of this file and read the section entitled 'simplified API'. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 281 | */ |
| 282 | |
| 283 | /* Version information for png.h - this should match the version in png.c */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 284 | #define PNG_LIBPNG_VER_STRING "1.6.19" |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 285 | #define PNG_HEADER_VERSION_STRING \ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 286 | " libpng version 1.6.19 - November 12, 2015\n" |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 287 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 288 | #define PNG_LIBPNG_VER_SONUM 16 |
| 289 | #define PNG_LIBPNG_VER_DLLNUM 16 |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 290 | |
| 291 | /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */ |
| 292 | #define PNG_LIBPNG_VER_MAJOR 1 |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 293 | #define PNG_LIBPNG_VER_MINOR 6 |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 294 | #define PNG_LIBPNG_VER_RELEASE 19 |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 295 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 296 | /* This should match the numeric part of the final component of |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 297 | * PNG_LIBPNG_VER_STRING, omitting any leading zero: |
| 298 | */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 299 | |
| 300 | #define PNG_LIBPNG_VER_BUILD 0 |
| 301 | |
| 302 | /* Release Status */ |
| 303 | #define PNG_LIBPNG_BUILD_ALPHA 1 |
| 304 | #define PNG_LIBPNG_BUILD_BETA 2 |
| 305 | #define PNG_LIBPNG_BUILD_RC 3 |
| 306 | #define PNG_LIBPNG_BUILD_STABLE 4 |
| 307 | #define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7 |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 308 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 309 | /* Release-Specific Flags */ |
| 310 | #define PNG_LIBPNG_BUILD_PATCH 8 /* Can be OR'ed with |
| 311 | PNG_LIBPNG_BUILD_STABLE only */ |
| 312 | #define PNG_LIBPNG_BUILD_PRIVATE 16 /* Cannot be OR'ed with |
| 313 | PNG_LIBPNG_BUILD_SPECIAL */ |
| 314 | #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with |
| 315 | PNG_LIBPNG_BUILD_PRIVATE */ |
| 316 | |
| 317 | #define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE |
| 318 | |
| 319 | /* Careful here. At one time, Guy wanted to use 082, but that would be octal. |
| 320 | * We must not include leading zeros. |
| 321 | * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only |
| 322 | * version 1.0.0 was mis-numbered 100 instead of 10000). From |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 323 | * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release |
| 324 | */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 325 | #define PNG_LIBPNG_VER 10619 /* 1.6.19 */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 326 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 327 | /* Library configuration: these options cannot be changed after |
| 328 | * the library has been built. |
| 329 | */ |
| 330 | #ifndef PNGLCONF_H |
| 331 | /* If pnglibconf.h is missing, you can |
| 332 | * copy scripts/pnglibconf.h.prebuilt to pnglibconf.h |
| 333 | */ |
| 334 | # include "pnglibconf.h" |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 335 | #endif |
| 336 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 337 | #ifndef PNG_VERSION_INFO_ONLY |
| 338 | /* Machine specific configuration. */ |
| 339 | # include "pngconf.h" |
| 340 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 341 | |
| 342 | /* |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 343 | * Added at libpng-1.2.8 |
| 344 | * |
| 345 | * Ref MSDN: Private as priority over Special |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 346 | * VS_FF_PRIVATEBUILD File *was not* built using standard release |
| 347 | * procedures. If this value is given, the StringFileInfo block must |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 348 | * contain a PrivateBuild string. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 349 | * |
| 350 | * VS_FF_SPECIALBUILD File *was* built by the original company using |
| 351 | * standard release procedures but is a variation of the standard |
| 352 | * file of the same version number. If this value is given, the |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 353 | * StringFileInfo block must contain a SpecialBuild string. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 354 | */ |
| 355 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 356 | #ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 357 | # define PNG_LIBPNG_BUILD_TYPE \ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 358 | (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 359 | #else |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 360 | # ifdef PNG_LIBPNG_SPECIALBUILD |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 361 | # define PNG_LIBPNG_BUILD_TYPE \ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 362 | (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 363 | # else |
| 364 | # define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE) |
| 365 | # endif |
| 366 | #endif |
| 367 | |
| 368 | #ifndef PNG_VERSION_INFO_ONLY |
| 369 | |
| 370 | /* Inhibit C++ name-mangling for libpng functions but not for system calls. */ |
| 371 | #ifdef __cplusplus |
| 372 | extern "C" { |
| 373 | #endif /* __cplusplus */ |
| 374 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 375 | /* Version information for C files, stored in png.c. This had better match |
| 376 | * the version above. |
| 377 | */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 378 | #define png_libpng_ver png_get_header_ver(NULL) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 379 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 380 | /* This file is arranged in several sections: |
| 381 | * |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 382 | * 1. [omitted] |
| 383 | * 2. Any configuration options that can be specified by for the application |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 384 | * code when it is built. (Build time configuration is in pnglibconf.h) |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 385 | * 3. Type definitions (base types are defined in pngconf.h), structure |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 386 | * definitions. |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 387 | * 4. Exported library functions. |
| 388 | * 5. Simplified API. |
| 389 | * 6. Implementation options. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 390 | * |
| 391 | * The library source code has additional files (principally pngpriv.h) that |
| 392 | * allow configuration of the library. |
| 393 | */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 394 | |
| 395 | /* Section 1: [omitted] */ |
| 396 | |
| 397 | /* Section 2: run time configuration |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 398 | * See pnglibconf.h for build time configuration |
| 399 | * |
| 400 | * Run time configuration allows the application to choose between |
| 401 | * implementations of certain arithmetic APIs. The default is set |
| 402 | * at build time and recorded in pnglibconf.h, but it is safe to |
| 403 | * override these (and only these) settings. Note that this won't |
| 404 | * change what the library does, only application code, and the |
| 405 | * settings can (and probably should) be made on a per-file basis |
| 406 | * by setting the #defines before including png.h |
| 407 | * |
| 408 | * Use macros to read integers from PNG data or use the exported |
| 409 | * functions? |
| 410 | * PNG_USE_READ_MACROS: use the macros (see below) Note that |
| 411 | * the macros evaluate their argument multiple times. |
| 412 | * PNG_NO_USE_READ_MACROS: call the relevant library function. |
| 413 | * |
| 414 | * Use the alternative algorithm for compositing alpha samples that |
| 415 | * does not use division? |
| 416 | * PNG_READ_COMPOSITE_NODIV_SUPPORTED: use the 'no division' |
| 417 | * algorithm. |
| 418 | * PNG_NO_READ_COMPOSITE_NODIV: use the 'division' algorithm. |
| 419 | * |
| 420 | * How to handle benign errors if PNG_ALLOW_BENIGN_ERRORS is |
| 421 | * false? |
| 422 | * PNG_ALLOW_BENIGN_ERRORS: map calls to the benign error |
| 423 | * APIs to png_warning. |
| 424 | * Otherwise the calls are mapped to png_error. |
| 425 | */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 426 | |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 427 | /* Section 3: type definitions, including structures and compile time |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 428 | * constants. |
| 429 | * See pngconf.h for base types that vary by machine/system |
| 430 | */ |
| 431 | |
| 432 | /* This triggers a compiler error in png.c, if png.c and png.h |
| 433 | * do not agree upon the version number. |
| 434 | */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 435 | typedef char* png_libpng_version_1_6_19; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 436 | |
| 437 | /* Basic control structions. Read libpng-manual.txt or libpng.3 for more info. |
| 438 | * |
| 439 | * png_struct is the cache of information used while reading or writing a single |
| 440 | * PNG file. One of these is always required, although the simplified API |
| 441 | * (below) hides the creation and destruction of it. |
| 442 | */ |
| 443 | typedef struct png_struct_def png_struct; |
| 444 | typedef const png_struct * png_const_structp; |
| 445 | typedef png_struct * png_structp; |
| 446 | typedef png_struct * * png_structpp; |
| 447 | |
| 448 | /* png_info contains information read from or to be written to a PNG file. One |
| 449 | * or more of these must exist while reading or creating a PNG file. The |
| 450 | * information is not used by libpng during read but is used to control what |
| 451 | * gets written when a PNG file is created. "png_get_" function calls read |
| 452 | * information during read and "png_set_" functions calls write information |
| 453 | * when creating a PNG. |
| 454 | * been moved into a separate header file that is not accessible to |
| 455 | * applications. Read libpng-manual.txt or libpng.3 for more info. |
| 456 | */ |
| 457 | typedef struct png_info_def png_info; |
| 458 | typedef png_info * png_infop; |
| 459 | typedef const png_info * png_const_infop; |
| 460 | typedef png_info * * png_infopp; |
| 461 | |
| 462 | /* Types with names ending 'p' are pointer types. The corresponding types with |
| 463 | * names ending 'rp' are identical pointer types except that the pointer is |
| 464 | * marked 'restrict', which means that it is the only pointer to the object |
| 465 | * passed to the function. Applications should not use the 'restrict' types; |
| 466 | * it is always valid to pass 'p' to a pointer with a function argument of the |
| 467 | * corresponding 'rp' type. Different compilers have different rules with |
| 468 | * regard to type matching in the presence of 'restrict'. For backward |
| 469 | * compatibility libpng callbacks never have 'restrict' in their parameters and, |
| 470 | * consequentially, writing portable application code is extremely difficult if |
| 471 | * an attempt is made to use 'restrict'. |
| 472 | */ |
| 473 | typedef png_struct * PNG_RESTRICT png_structrp; |
| 474 | typedef const png_struct * PNG_RESTRICT png_const_structrp; |
| 475 | typedef png_info * PNG_RESTRICT png_inforp; |
| 476 | typedef const png_info * PNG_RESTRICT png_const_inforp; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 477 | |
| 478 | /* Three color definitions. The order of the red, green, and blue, (and the |
| 479 | * exact size) is not important, although the size of the fields need to |
| 480 | * be png_byte or png_uint_16 (as defined below). |
| 481 | */ |
| 482 | typedef struct png_color_struct |
| 483 | { |
| 484 | png_byte red; |
| 485 | png_byte green; |
| 486 | png_byte blue; |
| 487 | } png_color; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 488 | typedef png_color * png_colorp; |
| 489 | typedef const png_color * png_const_colorp; |
| 490 | typedef png_color * * png_colorpp; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 491 | |
| 492 | typedef struct png_color_16_struct |
| 493 | { |
| 494 | png_byte index; /* used for palette files */ |
| 495 | png_uint_16 red; /* for use in red green blue files */ |
| 496 | png_uint_16 green; |
| 497 | png_uint_16 blue; |
| 498 | png_uint_16 gray; /* for use in grayscale files */ |
| 499 | } png_color_16; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 500 | typedef png_color_16 * png_color_16p; |
| 501 | typedef const png_color_16 * png_const_color_16p; |
| 502 | typedef png_color_16 * * png_color_16pp; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 503 | |
| 504 | typedef struct png_color_8_struct |
| 505 | { |
| 506 | png_byte red; /* for use in red green blue files */ |
| 507 | png_byte green; |
| 508 | png_byte blue; |
| 509 | png_byte gray; /* for use in grayscale files */ |
| 510 | png_byte alpha; /* for alpha channel files */ |
| 511 | } png_color_8; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 512 | typedef png_color_8 * png_color_8p; |
| 513 | typedef const png_color_8 * png_const_color_8p; |
| 514 | typedef png_color_8 * * png_color_8pp; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 515 | |
| 516 | /* |
| 517 | * The following two structures are used for the in-core representation |
| 518 | * of sPLT chunks. |
| 519 | */ |
| 520 | typedef struct png_sPLT_entry_struct |
| 521 | { |
| 522 | png_uint_16 red; |
| 523 | png_uint_16 green; |
| 524 | png_uint_16 blue; |
| 525 | png_uint_16 alpha; |
| 526 | png_uint_16 frequency; |
| 527 | } png_sPLT_entry; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 528 | typedef png_sPLT_entry * png_sPLT_entryp; |
| 529 | typedef const png_sPLT_entry * png_const_sPLT_entryp; |
| 530 | typedef png_sPLT_entry * * png_sPLT_entrypp; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 531 | |
| 532 | /* When the depth of the sPLT palette is 8 bits, the color and alpha samples |
| 533 | * occupy the LSB of their respective members, and the MSB of each member |
| 534 | * is zero-filled. The frequency member always occupies the full 16 bits. |
| 535 | */ |
| 536 | |
| 537 | typedef struct png_sPLT_struct |
| 538 | { |
| 539 | png_charp name; /* palette name */ |
| 540 | png_byte depth; /* depth of palette samples */ |
| 541 | png_sPLT_entryp entries; /* palette entries */ |
| 542 | png_int_32 nentries; /* number of palette entries */ |
| 543 | } png_sPLT_t; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 544 | typedef png_sPLT_t * png_sPLT_tp; |
| 545 | typedef const png_sPLT_t * png_const_sPLT_tp; |
| 546 | typedef png_sPLT_t * * png_sPLT_tpp; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 547 | |
| 548 | #ifdef PNG_TEXT_SUPPORTED |
| 549 | /* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file, |
| 550 | * and whether that contents is compressed or not. The "key" field |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 551 | * points to a regular zero-terminated C string. The "text" fields can be a |
| 552 | * regular C string, an empty string, or a NULL pointer. |
| 553 | * However, the structure returned by png_get_text() will always contain |
| 554 | * the "text" field as a regular zero-terminated C string (possibly |
| 555 | * empty), never a NULL pointer, so it can be safely used in printf() and |
| 556 | * other string-handling functions. Note that the "itxt_length", "lang", and |
| 557 | * "lang_key" members of the structure only exist when the library is built |
| 558 | * with iTXt chunk support. Prior to libpng-1.4.0 the library was built by |
| 559 | * default without iTXt support. Also note that when iTXt *is* supported, |
| 560 | * the "lang" and "lang_key" fields contain NULL pointers when the |
| 561 | * "compression" field contains * PNG_TEXT_COMPRESSION_NONE or |
| 562 | * PNG_TEXT_COMPRESSION_zTXt. Note that the "compression value" is not the |
| 563 | * same as what appears in the PNG tEXt/zTXt/iTXt chunk's "compression flag" |
| 564 | * which is always 0 or 1, or its "compression method" which is always 0. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 565 | */ |
| 566 | typedef struct png_text_struct |
| 567 | { |
| 568 | int compression; /* compression value: |
| 569 | -1: tEXt, none |
| 570 | 0: zTXt, deflate |
| 571 | 1: iTXt, none |
| 572 | 2: iTXt, deflate */ |
| 573 | png_charp key; /* keyword, 1-79 character description of "text" */ |
| 574 | png_charp text; /* comment, may be an empty string (ie "") |
| 575 | or a NULL pointer */ |
| 576 | png_size_t text_length; /* length of the text string */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 577 | png_size_t itxt_length; /* length of the itxt string */ |
| 578 | png_charp lang; /* language code, 0-79 characters |
| 579 | or a NULL pointer */ |
| 580 | png_charp lang_key; /* keyword translated UTF-8 string, 0 or more |
| 581 | chars or a NULL pointer */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 582 | } png_text; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 583 | typedef png_text * png_textp; |
| 584 | typedef const png_text * png_const_textp; |
| 585 | typedef png_text * * png_textpp; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 586 | #endif |
| 587 | |
| 588 | /* Supported compression types for text in PNG files (tEXt, and zTXt). |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 589 | * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 590 | #define PNG_TEXT_COMPRESSION_NONE_WR -3 |
| 591 | #define PNG_TEXT_COMPRESSION_zTXt_WR -2 |
| 592 | #define PNG_TEXT_COMPRESSION_NONE -1 |
| 593 | #define PNG_TEXT_COMPRESSION_zTXt 0 |
| 594 | #define PNG_ITXT_COMPRESSION_NONE 1 |
| 595 | #define PNG_ITXT_COMPRESSION_zTXt 2 |
| 596 | #define PNG_TEXT_COMPRESSION_LAST 3 /* Not a valid value */ |
| 597 | |
| 598 | /* png_time is a way to hold the time in an machine independent way. |
| 599 | * Two conversions are provided, both from time_t and struct tm. There |
| 600 | * is no portable way to convert to either of these structures, as far |
| 601 | * as I know. If you know of a portable way, send it to me. As a side |
| 602 | * note - PNG has always been Year 2000 compliant! |
| 603 | */ |
| 604 | typedef struct png_time_struct |
| 605 | { |
| 606 | png_uint_16 year; /* full year, as in, 1995 */ |
| 607 | png_byte month; /* month of year, 1 - 12 */ |
| 608 | png_byte day; /* day of month, 1 - 31 */ |
| 609 | png_byte hour; /* hour of day, 0 - 23 */ |
| 610 | png_byte minute; /* minute of hour, 0 - 59 */ |
| 611 | png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ |
| 612 | } png_time; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 613 | typedef png_time * png_timep; |
| 614 | typedef const png_time * png_const_timep; |
| 615 | typedef png_time * * png_timepp; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 616 | |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 617 | #if defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED) ||\ |
| 618 | defined(PNG_USER_CHUNKS_SUPPORTED) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 619 | /* png_unknown_chunk is a structure to hold queued chunks for which there is |
| 620 | * no specific support. The idea is that we can use this to queue |
| 621 | * up private chunks for output even though the library doesn't actually |
| 622 | * know about their semantics. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 623 | * |
| 624 | * The data in the structure is set by libpng on read and used on write. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 625 | */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 626 | typedef struct png_unknown_chunk_t |
| 627 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 628 | png_byte name[5]; /* Textual chunk name with '\0' terminator */ |
| 629 | png_byte *data; /* Data, should not be modified on read! */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 630 | png_size_t size; |
| 631 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 632 | /* On write 'location' must be set using the flag values listed below. |
| 633 | * Notice that on read it is set by libpng however the values stored have |
| 634 | * more bits set than are listed below. Always treat the value as a |
| 635 | * bitmask. On write set only one bit - setting multiple bits may cause the |
| 636 | * chunk to be written in multiple places. |
| 637 | */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 638 | png_byte location; /* mode of operation at read time */ |
| 639 | } |
| 640 | png_unknown_chunk; |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 641 | |
| 642 | typedef png_unknown_chunk * png_unknown_chunkp; |
| 643 | typedef const png_unknown_chunk * png_const_unknown_chunkp; |
| 644 | typedef png_unknown_chunk * * png_unknown_chunkpp; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 645 | #endif |
| 646 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 647 | /* Flag values for the unknown chunk location byte. */ |
| 648 | #define PNG_HAVE_IHDR 0x01 |
| 649 | #define PNG_HAVE_PLTE 0x02 |
| 650 | #define PNG_AFTER_IDAT 0x08 |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 651 | |
| 652 | /* Maximum positive integer used in PNG is (2^31)-1 */ |
| 653 | #define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL) |
| 654 | #define PNG_UINT_32_MAX ((png_uint_32)(-1)) |
| 655 | #define PNG_SIZE_MAX ((png_size_t)(-1)) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 656 | |
| 657 | /* These are constants for fixed point values encoded in the |
| 658 | * PNG specification manner (x100000) |
| 659 | */ |
| 660 | #define PNG_FP_1 100000 |
| 661 | #define PNG_FP_HALF 50000 |
| 662 | #define PNG_FP_MAX ((png_fixed_point)0x7fffffffL) |
| 663 | #define PNG_FP_MIN (-PNG_FP_MAX) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 664 | |
| 665 | /* These describe the color_type field in png_info. */ |
| 666 | /* color type masks */ |
| 667 | #define PNG_COLOR_MASK_PALETTE 1 |
| 668 | #define PNG_COLOR_MASK_COLOR 2 |
| 669 | #define PNG_COLOR_MASK_ALPHA 4 |
| 670 | |
| 671 | /* color types. Note that not all combinations are legal */ |
| 672 | #define PNG_COLOR_TYPE_GRAY 0 |
| 673 | #define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE) |
| 674 | #define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR) |
| 675 | #define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA) |
| 676 | #define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA) |
| 677 | /* aliases */ |
| 678 | #define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA |
| 679 | #define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA |
| 680 | |
| 681 | /* This is for compression type. PNG 1.0-1.2 only define the single type. */ |
| 682 | #define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */ |
| 683 | #define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE |
| 684 | |
| 685 | /* This is for filter type. PNG 1.0-1.2 only define the single type. */ |
| 686 | #define PNG_FILTER_TYPE_BASE 0 /* Single row per-byte filtering */ |
| 687 | #define PNG_INTRAPIXEL_DIFFERENCING 64 /* Used only in MNG datastreams */ |
| 688 | #define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE |
| 689 | |
| 690 | /* These are for the interlacing type. These values should NOT be changed. */ |
| 691 | #define PNG_INTERLACE_NONE 0 /* Non-interlaced image */ |
| 692 | #define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */ |
| 693 | #define PNG_INTERLACE_LAST 2 /* Not a valid value */ |
| 694 | |
| 695 | /* These are for the oFFs chunk. These values should NOT be changed. */ |
| 696 | #define PNG_OFFSET_PIXEL 0 /* Offset in pixels */ |
| 697 | #define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */ |
| 698 | #define PNG_OFFSET_LAST 2 /* Not a valid value */ |
| 699 | |
| 700 | /* These are for the pCAL chunk. These values should NOT be changed. */ |
| 701 | #define PNG_EQUATION_LINEAR 0 /* Linear transformation */ |
| 702 | #define PNG_EQUATION_BASE_E 1 /* Exponential base e transform */ |
| 703 | #define PNG_EQUATION_ARBITRARY 2 /* Arbitrary base exponential transform */ |
| 704 | #define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */ |
| 705 | #define PNG_EQUATION_LAST 4 /* Not a valid value */ |
| 706 | |
| 707 | /* These are for the sCAL chunk. These values should NOT be changed. */ |
| 708 | #define PNG_SCALE_UNKNOWN 0 /* unknown unit (image scale) */ |
| 709 | #define PNG_SCALE_METER 1 /* meters per pixel */ |
| 710 | #define PNG_SCALE_RADIAN 2 /* radians per pixel */ |
| 711 | #define PNG_SCALE_LAST 3 /* Not a valid value */ |
| 712 | |
| 713 | /* These are for the pHYs chunk. These values should NOT be changed. */ |
| 714 | #define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */ |
| 715 | #define PNG_RESOLUTION_METER 1 /* pixels/meter */ |
| 716 | #define PNG_RESOLUTION_LAST 2 /* Not a valid value */ |
| 717 | |
| 718 | /* These are for the sRGB chunk. These values should NOT be changed. */ |
| 719 | #define PNG_sRGB_INTENT_PERCEPTUAL 0 |
| 720 | #define PNG_sRGB_INTENT_RELATIVE 1 |
| 721 | #define PNG_sRGB_INTENT_SATURATION 2 |
| 722 | #define PNG_sRGB_INTENT_ABSOLUTE 3 |
| 723 | #define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */ |
| 724 | |
| 725 | /* This is for text chunks */ |
| 726 | #define PNG_KEYWORD_MAX_LENGTH 79 |
| 727 | |
| 728 | /* Maximum number of entries in PLTE/sPLT/tRNS arrays */ |
| 729 | #define PNG_MAX_PALETTE_LENGTH 256 |
| 730 | |
| 731 | /* These determine if an ancillary chunk's data has been successfully read |
| 732 | * from the PNG header, or if the application has filled in the corresponding |
| 733 | * data in the info_struct to be written into the output file. The values |
| 734 | * of the PNG_INFO_<chunk> defines should NOT be changed. |
| 735 | */ |
| 736 | #define PNG_INFO_gAMA 0x0001 |
| 737 | #define PNG_INFO_sBIT 0x0002 |
| 738 | #define PNG_INFO_cHRM 0x0004 |
| 739 | #define PNG_INFO_PLTE 0x0008 |
| 740 | #define PNG_INFO_tRNS 0x0010 |
| 741 | #define PNG_INFO_bKGD 0x0020 |
| 742 | #define PNG_INFO_hIST 0x0040 |
| 743 | #define PNG_INFO_pHYs 0x0080 |
| 744 | #define PNG_INFO_oFFs 0x0100 |
| 745 | #define PNG_INFO_tIME 0x0200 |
| 746 | #define PNG_INFO_pCAL 0x0400 |
| 747 | #define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */ |
| 748 | #define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ |
| 749 | #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ |
| 750 | #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 751 | #if INT_MAX >= 0x8000 /* else this might break */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 752 | #define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 753 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 754 | |
| 755 | /* This is used for the transformation routines, as some of them |
| 756 | * change these values for the row. It also should enable using |
| 757 | * the routines for other purposes. |
| 758 | */ |
| 759 | typedef struct png_row_info_struct |
| 760 | { |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 761 | png_uint_32 width; /* width of row */ |
| 762 | png_size_t rowbytes; /* number of bytes in row */ |
| 763 | png_byte color_type; /* color type of row */ |
| 764 | png_byte bit_depth; /* bit depth of row */ |
| 765 | png_byte channels; /* number of channels (1, 2, 3, or 4) */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 766 | png_byte pixel_depth; /* bits per pixel (depth * channels) */ |
| 767 | } png_row_info; |
| 768 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 769 | typedef png_row_info * png_row_infop; |
| 770 | typedef png_row_info * * png_row_infopp; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 771 | |
| 772 | /* These are the function types for the I/O functions and for the functions |
| 773 | * that allow the user to override the default I/O functions with his or her |
| 774 | * own. The png_error_ptr type should match that of user-supplied warning |
| 775 | * and error functions, while the png_rw_ptr type should match that of the |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 776 | * user read/write data functions. Note that the 'write' function must not |
| 777 | * modify the buffer it is passed. The 'read' function, on the other hand, is |
| 778 | * expected to return the read data in the buffer. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 779 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 780 | typedef PNG_CALLBACK(void, *png_error_ptr, (png_structp, png_const_charp)); |
| 781 | typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t)); |
| 782 | typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp)); |
| 783 | typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32, |
| 784 | int)); |
| 785 | typedef PNG_CALLBACK(void, *png_write_status_ptr, (png_structp, png_uint_32, |
| 786 | int)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 787 | |
| 788 | #ifdef PNG_PROGRESSIVE_READ_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 789 | typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop)); |
| 790 | typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop)); |
| 791 | |
| 792 | /* The following callback receives png_uint_32 row_number, int pass for the |
| 793 | * png_bytep data of the row. When transforming an interlaced image the |
| 794 | * row number is the row number within the sub-image of the interlace pass, so |
| 795 | * the value will increase to the height of the sub-image (not the full image) |
| 796 | * then reset to 0 for the next pass. |
| 797 | * |
| 798 | * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to |
| 799 | * find the output pixel (x,y) given an interlaced sub-image pixel |
| 800 | * (row,col,pass). (See below for these macros.) |
| 801 | */ |
| 802 | typedef PNG_CALLBACK(void, *png_progressive_row_ptr, (png_structp, png_bytep, |
| 803 | png_uint_32, int)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 804 | #endif |
| 805 | |
| 806 | #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 807 | defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) |
| 808 | typedef PNG_CALLBACK(void, *png_user_transform_ptr, (png_structp, png_row_infop, |
| 809 | png_bytep)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 810 | #endif |
| 811 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 812 | #ifdef PNG_USER_CHUNKS_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 813 | typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp, |
| 814 | png_unknown_chunkp)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 815 | #endif |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 816 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 817 | /* not used anywhere */ |
| 818 | /* typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp)); */ |
| 819 | #endif |
| 820 | |
| 821 | #ifdef PNG_SETJMP_SUPPORTED |
| 822 | /* This must match the function definition in <setjmp.h>, and the application |
| 823 | * must include this before png.h to obtain the definition of jmp_buf. The |
| 824 | * function is required to be PNG_NORETURN, but this is not checked. If the |
| 825 | * function does return the application will crash via an abort() or similar |
| 826 | * system level call. |
| 827 | * |
| 828 | * If you get a warning here while building the library you may need to make |
| 829 | * changes to ensure that pnglibconf.h records the calling convention used by |
| 830 | * your compiler. This may be very difficult - try using a different compiler |
| 831 | * to build the library! |
| 832 | */ |
| 833 | PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)), typedef); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 834 | #endif |
| 835 | |
| 836 | /* Transform masks for the high-level interface */ |
| 837 | #define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */ |
| 838 | #define PNG_TRANSFORM_STRIP_16 0x0001 /* read only */ |
| 839 | #define PNG_TRANSFORM_STRIP_ALPHA 0x0002 /* read only */ |
| 840 | #define PNG_TRANSFORM_PACKING 0x0004 /* read and write */ |
| 841 | #define PNG_TRANSFORM_PACKSWAP 0x0008 /* read and write */ |
| 842 | #define PNG_TRANSFORM_EXPAND 0x0010 /* read only */ |
| 843 | #define PNG_TRANSFORM_INVERT_MONO 0x0020 /* read and write */ |
| 844 | #define PNG_TRANSFORM_SHIFT 0x0040 /* read and write */ |
| 845 | #define PNG_TRANSFORM_BGR 0x0080 /* read and write */ |
| 846 | #define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */ |
| 847 | #define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */ |
| 848 | #define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 849 | #define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only */ |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 850 | /* Added to libpng-1.2.34 */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 851 | #define PNG_TRANSFORM_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER |
| 852 | #define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */ |
| 853 | /* Added to libpng-1.4.0 */ |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 854 | #define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 855 | /* Added to libpng-1.5.4 */ |
| 856 | #define PNG_TRANSFORM_EXPAND_16 0x4000 /* read only */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 857 | #if INT_MAX >= 0x8000 /* else this might break */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 858 | #define PNG_TRANSFORM_SCALE_16 0x8000 /* read only */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 859 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 860 | |
| 861 | /* Flags for MNG supported features */ |
| 862 | #define PNG_FLAG_MNG_EMPTY_PLTE 0x01 |
| 863 | #define PNG_FLAG_MNG_FILTER_64 0x04 |
| 864 | #define PNG_ALL_MNG_FEATURES 0x05 |
| 865 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 866 | /* NOTE: prior to 1.5 these functions had no 'API' style declaration, |
| 867 | * this allowed the zlib default functions to be used on Windows |
| 868 | * platforms. In 1.5 the zlib default malloc (which just calls malloc and |
| 869 | * ignores the first argument) should be completely compatible with the |
| 870 | * following. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 871 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 872 | typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp, |
| 873 | png_alloc_size_t)); |
| 874 | typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 875 | |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 876 | /* Section 4: exported functions |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 877 | * Here are the function definitions most commonly used. This is not |
| 878 | * the place to find out how to use libpng. See libpng-manual.txt for the |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 879 | * full explanation, see example.c for the summary. This just provides |
| 880 | * a simple one line description of the use of each function. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 881 | * |
| 882 | * The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in |
| 883 | * pngconf.h and in the *.dfn files in the scripts directory. |
| 884 | * |
| 885 | * PNG_EXPORT(ordinal, type, name, (args)); |
| 886 | * |
| 887 | * ordinal: ordinal that is used while building |
| 888 | * *.def files. The ordinal value is only |
| 889 | * relevant when preprocessing png.h with |
| 890 | * the *.dfn files for building symbol table |
| 891 | * entries, and are removed by pngconf.h. |
| 892 | * type: return type of the function |
| 893 | * name: function name |
| 894 | * args: function arguments, with types |
| 895 | * |
| 896 | * When we wish to append attributes to a function prototype we use |
| 897 | * the PNG_EXPORTA() macro instead. |
| 898 | * |
| 899 | * PNG_EXPORTA(ordinal, type, name, (args), attributes); |
| 900 | * |
| 901 | * ordinal, type, name, and args: same as in PNG_EXPORT(). |
| 902 | * attributes: function attributes |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 903 | */ |
| 904 | |
| 905 | /* Returns the version number of the library */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 906 | PNG_EXPORT(1, png_uint_32, png_access_version_number, (void)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 907 | |
| 908 | /* Tell lib we have already handled the first <num_bytes> magic bytes. |
| 909 | * Handling more than 8 bytes from the beginning of the file is an error. |
| 910 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 911 | PNG_EXPORT(2, void, png_set_sig_bytes, (png_structrp png_ptr, int num_bytes)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 912 | |
| 913 | /* Check sig[start] through sig[start + num_to_check - 1] to see if it's a |
| 914 | * PNG file. Returns zero if the supplied bytes match the 8-byte PNG |
| 915 | * signature, and non-zero otherwise. Having num_to_check == 0 or |
| 916 | * start > 7 will always fail (ie return non-zero). |
| 917 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 918 | PNG_EXPORT(3, int, png_sig_cmp, (png_const_bytep sig, png_size_t start, |
| 919 | png_size_t num_to_check)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 920 | |
| 921 | /* Simple signature checking function. This is the same as calling |
| 922 | * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). |
| 923 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 924 | #define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 925 | |
| 926 | /* Allocate and initialize png_ptr struct for reading, and any other memory. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 927 | PNG_EXPORTA(4, png_structp, png_create_read_struct, |
| 928 | (png_const_charp user_png_ver, png_voidp error_ptr, |
| 929 | png_error_ptr error_fn, png_error_ptr warn_fn), |
| 930 | PNG_ALLOCATED); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 931 | |
| 932 | /* Allocate and initialize png_ptr struct for writing, and any other memory */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 933 | PNG_EXPORTA(5, png_structp, png_create_write_struct, |
| 934 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, |
| 935 | png_error_ptr warn_fn), |
| 936 | PNG_ALLOCATED); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 937 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 938 | PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size, |
| 939 | (png_const_structrp png_ptr)); |
| 940 | |
| 941 | PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structrp png_ptr, |
| 942 | png_size_t size)); |
| 943 | |
| 944 | /* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp |
| 945 | * match up. |
| 946 | */ |
| 947 | #ifdef PNG_SETJMP_SUPPORTED |
| 948 | /* This function returns the jmp_buf built in to *png_ptr. It must be |
| 949 | * supplied with an appropriate 'longjmp' function to use on that jmp_buf |
| 950 | * unless the default error function is overridden in which case NULL is |
| 951 | * acceptable. The size of the jmp_buf is checked against the actual size |
| 952 | * allocated by the library - the call will return NULL on a mismatch |
| 953 | * indicating an ABI mismatch. |
| 954 | */ |
| 955 | PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structrp png_ptr, |
| 956 | png_longjmp_ptr longjmp_fn, size_t jmp_buf_size)); |
| 957 | # define png_jmpbuf(png_ptr) \ |
| 958 | (*png_set_longjmp_fn((png_ptr), longjmp, (sizeof (jmp_buf)))) |
| 959 | #else |
| 960 | # define png_jmpbuf(png_ptr) \ |
| 961 | (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 962 | #endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 963 | /* This function should be used by libpng applications in place of |
| 964 | * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it |
| 965 | * will use it; otherwise it will call PNG_ABORT(). This function was |
| 966 | * added in libpng-1.5.0. |
| 967 | */ |
| 968 | PNG_EXPORTA(9, void, png_longjmp, (png_const_structrp png_ptr, int val), |
| 969 | PNG_NORETURN); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 970 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 971 | #ifdef PNG_READ_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 972 | /* Reset the compression stream */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 973 | PNG_EXPORTA(10, int, png_reset_zstream, (png_structrp png_ptr), PNG_DEPRECATED); |
| 974 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 975 | |
| 976 | /* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */ |
| 977 | #ifdef PNG_USER_MEM_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 978 | PNG_EXPORTA(11, png_structp, png_create_read_struct_2, |
| 979 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, |
| 980 | png_error_ptr warn_fn, |
| 981 | png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), |
| 982 | PNG_ALLOCATED); |
| 983 | PNG_EXPORTA(12, png_structp, png_create_write_struct_2, |
| 984 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, |
| 985 | png_error_ptr warn_fn, |
| 986 | png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), |
| 987 | PNG_ALLOCATED); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 988 | #endif |
| 989 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 990 | /* Write the PNG file signature. */ |
| 991 | PNG_EXPORT(13, void, png_write_sig, (png_structrp png_ptr)); |
| 992 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 993 | /* Write a PNG chunk - size, type, (optional) data, CRC. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 994 | PNG_EXPORT(14, void, png_write_chunk, (png_structrp png_ptr, png_const_bytep |
| 995 | chunk_name, png_const_bytep data, png_size_t length)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 996 | |
| 997 | /* Write the start of a PNG chunk - length and chunk name. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 998 | PNG_EXPORT(15, void, png_write_chunk_start, (png_structrp png_ptr, |
| 999 | png_const_bytep chunk_name, png_uint_32 length)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1000 | |
| 1001 | /* Write the data of a PNG chunk started with png_write_chunk_start(). */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1002 | PNG_EXPORT(16, void, png_write_chunk_data, (png_structrp png_ptr, |
| 1003 | png_const_bytep data, png_size_t length)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1004 | |
| 1005 | /* Finish a chunk started with png_write_chunk_start() (includes CRC). */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1006 | PNG_EXPORT(17, void, png_write_chunk_end, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1007 | |
| 1008 | /* Allocate and initialize the info structure */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1009 | PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_const_structrp png_ptr), |
| 1010 | PNG_ALLOCATED); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1011 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1012 | /* DEPRECATED: this function allowed init structures to be created using the |
| 1013 | * default allocation method (typically malloc). Use is deprecated in 1.6.0 and |
| 1014 | * the API will be removed in the future. |
| 1015 | */ |
| 1016 | PNG_EXPORTA(19, void, png_info_init_3, (png_infopp info_ptr, |
| 1017 | png_size_t png_info_struct_size), PNG_DEPRECATED); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1018 | |
| 1019 | /* Writes all the PNG information before the image. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1020 | PNG_EXPORT(20, void, png_write_info_before_PLTE, |
| 1021 | (png_structrp png_ptr, png_const_inforp info_ptr)); |
| 1022 | PNG_EXPORT(21, void, png_write_info, |
| 1023 | (png_structrp png_ptr, png_const_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1024 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1025 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1026 | /* Read the information before the actual image data. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1027 | PNG_EXPORT(22, void, png_read_info, |
| 1028 | (png_structrp png_ptr, png_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1029 | #endif |
| 1030 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1031 | #ifdef PNG_TIME_RFC1123_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1032 | /* Convert to a US string format: there is no localization support in this |
| 1033 | * routine. The original implementation used a 29 character buffer in |
| 1034 | * png_struct, this will be removed in future versions. |
| 1035 | */ |
| 1036 | #if PNG_LIBPNG_VER < 10700 |
| 1037 | /* To do: remove this from libpng17 (and from libpng17/png.c and pngstruct.h) */ |
| 1038 | PNG_EXPORTA(23, png_const_charp, png_convert_to_rfc1123, (png_structrp png_ptr, |
| 1039 | png_const_timep ptime),PNG_DEPRECATED); |
| 1040 | #endif |
| 1041 | PNG_EXPORT(241, int, png_convert_to_rfc1123_buffer, (char out[29], |
| 1042 | png_const_timep ptime)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1043 | #endif |
| 1044 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1045 | #ifdef PNG_CONVERT_tIME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1046 | /* Convert from a struct tm to png_time */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1047 | PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime, |
| 1048 | const struct tm * ttime)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1049 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1050 | /* Convert from time_t to png_time. Uses gmtime() */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1051 | PNG_EXPORT(25, void, png_convert_from_time_t, (png_timep ptime, time_t ttime)); |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1052 | #endif /* CONVERT_tIME */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1053 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1054 | #ifdef PNG_READ_EXPAND_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1055 | /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1056 | PNG_EXPORT(26, void, png_set_expand, (png_structrp png_ptr)); |
| 1057 | PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structrp png_ptr)); |
| 1058 | PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structrp png_ptr)); |
| 1059 | PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1060 | #endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1061 | |
| 1062 | #ifdef PNG_READ_EXPAND_16_SUPPORTED |
| 1063 | /* Expand to 16-bit channels, forces conversion of palette to RGB and expansion |
| 1064 | * of a tRNS chunk if present. |
| 1065 | */ |
| 1066 | PNG_EXPORT(221, void, png_set_expand_16, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1067 | #endif |
| 1068 | |
| 1069 | #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) |
| 1070 | /* Use blue, green, red order for pixels. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1071 | PNG_EXPORT(30, void, png_set_bgr, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1072 | #endif |
| 1073 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1074 | #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1075 | /* Expand the grayscale to 24-bit RGB if necessary. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1076 | PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1077 | #endif |
| 1078 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1079 | #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1080 | /* Reduce RGB to grayscale. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1081 | #define PNG_ERROR_ACTION_NONE 1 |
| 1082 | #define PNG_ERROR_ACTION_WARN 2 |
| 1083 | #define PNG_ERROR_ACTION_ERROR 3 |
| 1084 | #define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/ |
| 1085 | |
| 1086 | PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structrp png_ptr, |
| 1087 | int error_action, double red, double green)) |
| 1088 | PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structrp png_ptr, |
| 1089 | int error_action, png_fixed_point red, png_fixed_point green)) |
| 1090 | |
| 1091 | PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structrp |
| 1092 | png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1093 | #endif |
| 1094 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1095 | #ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED |
| 1096 | PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth, |
| 1097 | png_colorp palette)); |
| 1098 | #endif |
| 1099 | |
| 1100 | #ifdef PNG_READ_ALPHA_MODE_SUPPORTED |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 1101 | /* How the alpha channel is interpreted - this affects how the color channels |
| 1102 | * of a PNG file are returned to the calling application when an alpha channel, |
| 1103 | * or a tRNS chunk in a palette file, is present. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1104 | * |
| 1105 | * This has no effect on the way pixels are written into a PNG output |
| 1106 | * datastream. The color samples in a PNG datastream are never premultiplied |
| 1107 | * with the alpha samples. |
| 1108 | * |
| 1109 | * The default is to return data according to the PNG specification: the alpha |
| 1110 | * channel is a linear measure of the contribution of the pixel to the |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 1111 | * corresponding composited pixel, and the color channels are unassociated |
| 1112 | * (not premultiplied). The gamma encoded color channels must be scaled |
| 1113 | * according to the contribution and to do this it is necessary to undo |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1114 | * the encoding, scale the color values, perform the composition and reencode |
| 1115 | * the values. This is the 'PNG' mode. |
| 1116 | * |
| 1117 | * The alternative is to 'associate' the alpha with the color information by |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 1118 | * storing color channel values that have been scaled by the alpha. |
| 1119 | * image. These are the 'STANDARD', 'ASSOCIATED' or 'PREMULTIPLIED' modes |
| 1120 | * (the latter being the two common names for associated alpha color channels). |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1121 | * |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 1122 | * For the 'OPTIMIZED' mode, a pixel is treated as opaque only if the alpha |
| 1123 | * value is equal to the maximum value. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1124 | * |
| 1125 | * The final choice is to gamma encode the alpha channel as well. This is |
| 1126 | * broken because, in practice, no implementation that uses this choice |
| 1127 | * correctly undoes the encoding before handling alpha composition. Use this |
| 1128 | * choice only if other serious errors in the software or hardware you use |
| 1129 | * mandate it; the typical serious error is for dark halos to appear around |
| 1130 | * opaque areas of the composited PNG image because of arithmetic overflow. |
| 1131 | * |
| 1132 | * The API function png_set_alpha_mode specifies which of these choices to use |
| 1133 | * with an enumerated 'mode' value and the gamma of the required output: |
| 1134 | */ |
| 1135 | #define PNG_ALPHA_PNG 0 /* according to the PNG standard */ |
| 1136 | #define PNG_ALPHA_STANDARD 1 /* according to Porter/Duff */ |
| 1137 | #define PNG_ALPHA_ASSOCIATED 1 /* as above; this is the normal practice */ |
| 1138 | #define PNG_ALPHA_PREMULTIPLIED 1 /* as above */ |
| 1139 | #define PNG_ALPHA_OPTIMIZED 2 /* 'PNG' for opaque pixels, else 'STANDARD' */ |
| 1140 | #define PNG_ALPHA_BROKEN 3 /* the alpha channel is gamma encoded */ |
| 1141 | |
| 1142 | PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structrp png_ptr, int mode, |
| 1143 | double output_gamma)) |
| 1144 | PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structrp png_ptr, |
| 1145 | int mode, png_fixed_point output_gamma)) |
| 1146 | #endif |
| 1147 | |
| 1148 | #if defined(PNG_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED) |
| 1149 | /* The output_gamma value is a screen gamma in libpng terminology: it expresses |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 1150 | * how to decode the output values, not how they are encoded. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1151 | */ |
| 1152 | #define PNG_DEFAULT_sRGB -1 /* sRGB gamma and color space */ |
| 1153 | #define PNG_GAMMA_MAC_18 -2 /* Old Mac '1.8' gamma and color space */ |
| 1154 | #define PNG_GAMMA_sRGB 220000 /* Television standards--matches sRGB gamma */ |
| 1155 | #define PNG_GAMMA_LINEAR PNG_FP_1 /* Linear */ |
| 1156 | #endif |
| 1157 | |
| 1158 | /* The following are examples of calls to png_set_alpha_mode to achieve the |
| 1159 | * required overall gamma correction and, where necessary, alpha |
| 1160 | * premultiplication. |
| 1161 | * |
| 1162 | * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB); |
| 1163 | * This is the default libpng handling of the alpha channel - it is not |
| 1164 | * pre-multiplied into the color components. In addition the call states |
| 1165 | * that the output is for a sRGB system and causes all PNG files without gAMA |
| 1166 | * chunks to be assumed to be encoded using sRGB. |
| 1167 | * |
| 1168 | * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC); |
| 1169 | * In this case the output is assumed to be something like an sRGB conformant |
| 1170 | * display preceeded by a power-law lookup table of power 1.45. This is how |
| 1171 | * early Mac systems behaved. |
| 1172 | * |
| 1173 | * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_GAMMA_LINEAR); |
| 1174 | * This is the classic Jim Blinn approach and will work in academic |
| 1175 | * environments where everything is done by the book. It has the shortcoming |
| 1176 | * of assuming that input PNG data with no gamma information is linear - this |
| 1177 | * is unlikely to be correct unless the PNG files where generated locally. |
| 1178 | * Most of the time the output precision will be so low as to show |
| 1179 | * significant banding in dark areas of the image. |
| 1180 | * |
| 1181 | * png_set_expand_16(pp); |
| 1182 | * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_DEFAULT_sRGB); |
| 1183 | * This is a somewhat more realistic Jim Blinn inspired approach. PNG files |
| 1184 | * are assumed to have the sRGB encoding if not marked with a gamma value and |
| 1185 | * the output is always 16 bits per component. This permits accurate scaling |
| 1186 | * and processing of the data. If you know that your input PNG files were |
| 1187 | * generated locally you might need to replace PNG_DEFAULT_sRGB with the |
| 1188 | * correct value for your system. |
| 1189 | * |
| 1190 | * png_set_alpha_mode(pp, PNG_ALPHA_OPTIMIZED, PNG_DEFAULT_sRGB); |
| 1191 | * If you just need to composite the PNG image onto an existing background |
| 1192 | * and if you control the code that does this you can use the optimization |
| 1193 | * setting. In this case you just copy completely opaque pixels to the |
| 1194 | * output. For pixels that are not completely transparent (you just skip |
| 1195 | * those) you do the composition math using png_composite or png_composite_16 |
| 1196 | * below then encode the resultant 8-bit or 16-bit values to match the output |
| 1197 | * encoding. |
| 1198 | * |
| 1199 | * Other cases |
| 1200 | * If neither the PNG nor the standard linear encoding work for you because |
| 1201 | * of the software or hardware you use then you have a big problem. The PNG |
| 1202 | * case will probably result in halos around the image. The linear encoding |
| 1203 | * will probably result in a washed out, too bright, image (it's actually too |
| 1204 | * contrasty.) Try the ALPHA_OPTIMIZED mode above - this will probably |
| 1205 | * substantially reduce the halos. Alternatively try: |
| 1206 | * |
| 1207 | * png_set_alpha_mode(pp, PNG_ALPHA_BROKEN, PNG_DEFAULT_sRGB); |
| 1208 | * This option will also reduce the halos, but there will be slight dark |
| 1209 | * halos round the opaque parts of the image where the background is light. |
| 1210 | * In the OPTIMIZED mode the halos will be light halos where the background |
| 1211 | * is dark. Take your pick - the halos are unavoidable unless you can get |
| 1212 | * your hardware/software fixed! (The OPTIMIZED approach is slightly |
| 1213 | * faster.) |
| 1214 | * |
| 1215 | * When the default gamma of PNG files doesn't match the output gamma. |
| 1216 | * If you have PNG files with no gamma information png_set_alpha_mode allows |
| 1217 | * you to provide a default gamma, but it also sets the ouput gamma to the |
| 1218 | * matching value. If you know your PNG files have a gamma that doesn't |
| 1219 | * match the output you can take advantage of the fact that |
| 1220 | * png_set_alpha_mode always sets the output gamma but only sets the PNG |
| 1221 | * default if it is not already set: |
| 1222 | * |
| 1223 | * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB); |
| 1224 | * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC); |
| 1225 | * The first call sets both the default and the output gamma values, the |
| 1226 | * second call overrides the output gamma without changing the default. This |
| 1227 | * is easier than achieving the same effect with png_set_gamma. You must use |
| 1228 | * PNG_ALPHA_PNG for the first call - internal checking in png_set_alpha will |
| 1229 | * fire if more than one call to png_set_alpha_mode and png_set_background is |
| 1230 | * made in the same read operation, however multiple calls with PNG_ALPHA_PNG |
| 1231 | * are ignored. |
| 1232 | */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1233 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1234 | #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1235 | PNG_EXPORT(36, void, png_set_strip_alpha, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1236 | #endif |
| 1237 | |
| 1238 | #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ |
| 1239 | defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1240 | PNG_EXPORT(37, void, png_set_swap_alpha, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1241 | #endif |
| 1242 | |
| 1243 | #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ |
| 1244 | defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1245 | PNG_EXPORT(38, void, png_set_invert_alpha, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1246 | #endif |
| 1247 | |
| 1248 | #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1249 | /* Add a filler byte to 8-bit or 16-bit Gray or 24-bit or 48-bit RGB images. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1250 | PNG_EXPORT(39, void, png_set_filler, (png_structrp png_ptr, png_uint_32 filler, |
| 1251 | int flags)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1252 | /* The values of the PNG_FILLER_ defines should NOT be changed */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1253 | # define PNG_FILLER_BEFORE 0 |
| 1254 | # define PNG_FILLER_AFTER 1 |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1255 | /* Add an alpha byte to 8-bit or 16-bit Gray or 24-bit or 48-bit RGB images. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1256 | PNG_EXPORT(40, void, png_set_add_alpha, (png_structrp png_ptr, |
| 1257 | png_uint_32 filler, int flags)); |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1258 | #endif /* READ_FILLER || WRITE_FILLER */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1259 | |
| 1260 | #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) |
| 1261 | /* Swap bytes in 16-bit depth files. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1262 | PNG_EXPORT(41, void, png_set_swap, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1263 | #endif |
| 1264 | |
| 1265 | #if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) |
| 1266 | /* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1267 | PNG_EXPORT(42, void, png_set_packing, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1268 | #endif |
| 1269 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1270 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ |
| 1271 | defined(PNG_WRITE_PACKSWAP_SUPPORTED) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1272 | /* Swap packing order of pixels in bytes. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1273 | PNG_EXPORT(43, void, png_set_packswap, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1274 | #endif |
| 1275 | |
| 1276 | #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) |
| 1277 | /* Converts files to legal bit depths. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1278 | PNG_EXPORT(44, void, png_set_shift, (png_structrp png_ptr, png_const_color_8p |
| 1279 | true_bits)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1280 | #endif |
| 1281 | |
| 1282 | #if defined(PNG_READ_INTERLACING_SUPPORTED) || \ |
| 1283 | defined(PNG_WRITE_INTERLACING_SUPPORTED) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1284 | /* Have the code handle the interlacing. Returns the number of passes. |
| 1285 | * MUST be called before png_read_update_info or png_start_read_image, |
| 1286 | * otherwise it will not have the desired effect. Note that it is still |
| 1287 | * necessary to call png_read_row or png_read_rows png_get_image_height |
| 1288 | * times for each pass. |
| 1289 | */ |
| 1290 | PNG_EXPORT(45, int, png_set_interlace_handling, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1291 | #endif |
| 1292 | |
| 1293 | #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) |
| 1294 | /* Invert monochrome files */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1295 | PNG_EXPORT(46, void, png_set_invert_mono, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1296 | #endif |
| 1297 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1298 | #ifdef PNG_READ_BACKGROUND_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1299 | /* Handle alpha and tRNS by replacing with a background color. Prior to |
| 1300 | * libpng-1.5.4 this API must not be called before the PNG file header has been |
| 1301 | * read. Doing so will result in unexpected behavior and possible warnings or |
| 1302 | * errors if the PNG file contains a bKGD chunk. |
| 1303 | */ |
| 1304 | PNG_FP_EXPORT(47, void, png_set_background, (png_structrp png_ptr, |
| 1305 | png_const_color_16p background_color, int background_gamma_code, |
| 1306 | int need_expand, double background_gamma)) |
| 1307 | PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structrp png_ptr, |
| 1308 | png_const_color_16p background_color, int background_gamma_code, |
| 1309 | int need_expand, png_fixed_point background_gamma)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1310 | #endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1311 | #ifdef PNG_READ_BACKGROUND_SUPPORTED |
| 1312 | # define PNG_BACKGROUND_GAMMA_UNKNOWN 0 |
| 1313 | # define PNG_BACKGROUND_GAMMA_SCREEN 1 |
| 1314 | # define PNG_BACKGROUND_GAMMA_FILE 2 |
| 1315 | # define PNG_BACKGROUND_GAMMA_UNIQUE 3 |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1316 | #endif |
| 1317 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1318 | #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED |
| 1319 | /* Scale a 16-bit depth file down to 8-bit, accurately. */ |
| 1320 | PNG_EXPORT(229, void, png_set_scale_16, (png_structrp png_ptr)); |
| 1321 | #endif |
| 1322 | |
| 1323 | #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED |
| 1324 | #define PNG_READ_16_TO_8 SUPPORTED /* Name prior to 1.5.4 */ |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1325 | /* Strip the second byte of information from a 16-bit depth file. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1326 | PNG_EXPORT(48, void, png_set_strip_16, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1327 | #endif |
| 1328 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1329 | #ifdef PNG_READ_QUANTIZE_SUPPORTED |
| 1330 | /* Turn on quantizing, and reduce the palette to the number of colors |
| 1331 | * available. |
| 1332 | */ |
| 1333 | PNG_EXPORT(49, void, png_set_quantize, (png_structrp png_ptr, |
| 1334 | png_colorp palette, int num_palette, int maximum_colors, |
| 1335 | png_const_uint_16p histogram, int full_quantize)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1336 | #endif |
| 1337 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1338 | #ifdef PNG_READ_GAMMA_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1339 | /* The threshold on gamma processing is configurable but hard-wired into the |
| 1340 | * library. The following is the floating point variant. |
| 1341 | */ |
| 1342 | #define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1343 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1344 | /* Handle gamma correction. Screen_gamma=(display_exponent). |
| 1345 | * NOTE: this API simply sets the screen and file gamma values. It will |
| 1346 | * therefore override the value for gamma in a PNG file if it is called after |
| 1347 | * the file header has been read - use with care - call before reading the PNG |
| 1348 | * file for best results! |
| 1349 | * |
| 1350 | * These routines accept the same gamma values as png_set_alpha_mode (described |
| 1351 | * above). The PNG_GAMMA_ defines and PNG_DEFAULT_sRGB can be passed to either |
| 1352 | * API (floating point or fixed.) Notice, however, that the 'file_gamma' value |
| 1353 | * is the inverse of a 'screen gamma' value. |
| 1354 | */ |
| 1355 | PNG_FP_EXPORT(50, void, png_set_gamma, (png_structrp png_ptr, |
| 1356 | double screen_gamma, double override_file_gamma)) |
| 1357 | PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structrp png_ptr, |
| 1358 | png_fixed_point screen_gamma, png_fixed_point override_file_gamma)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1359 | #endif |
| 1360 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1361 | #ifdef PNG_WRITE_FLUSH_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1362 | /* Set how many lines between output flushes - 0 for no flushing */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1363 | PNG_EXPORT(51, void, png_set_flush, (png_structrp png_ptr, int nrows)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1364 | /* Flush the current PNG output buffer */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1365 | PNG_EXPORT(52, void, png_write_flush, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1366 | #endif |
| 1367 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1368 | /* Optional update palette with requested transformations */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1369 | PNG_EXPORT(53, void, png_start_read_image, (png_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1370 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1371 | /* Optional call to update the users info structure */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1372 | PNG_EXPORT(54, void, png_read_update_info, (png_structrp png_ptr, |
| 1373 | png_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1374 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1375 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1376 | /* Read one or more rows of image data. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1377 | PNG_EXPORT(55, void, png_read_rows, (png_structrp png_ptr, png_bytepp row, |
| 1378 | png_bytepp display_row, png_uint_32 num_rows)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1379 | #endif |
| 1380 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1381 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1382 | /* Read a row of data. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1383 | PNG_EXPORT(56, void, png_read_row, (png_structrp png_ptr, png_bytep row, |
| 1384 | png_bytep display_row)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1385 | #endif |
| 1386 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1387 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1388 | /* Read the whole image into memory at once. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1389 | PNG_EXPORT(57, void, png_read_image, (png_structrp png_ptr, png_bytepp image)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1390 | #endif |
| 1391 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1392 | /* Write a row of image data */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1393 | PNG_EXPORT(58, void, png_write_row, (png_structrp png_ptr, |
| 1394 | png_const_bytep row)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1395 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1396 | /* Write a few rows of image data: (*row) is not written; however, the type |
| 1397 | * is declared as writeable to maintain compatibility with previous versions |
| 1398 | * of libpng and to allow the 'display_row' array from read_rows to be passed |
| 1399 | * unchanged to write_rows. |
| 1400 | */ |
| 1401 | PNG_EXPORT(59, void, png_write_rows, (png_structrp png_ptr, png_bytepp row, |
| 1402 | png_uint_32 num_rows)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1403 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1404 | /* Write the image data */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1405 | PNG_EXPORT(60, void, png_write_image, (png_structrp png_ptr, png_bytepp image)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1406 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1407 | /* Write the end of the PNG file. */ |
| 1408 | PNG_EXPORT(61, void, png_write_end, (png_structrp png_ptr, |
| 1409 | png_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1410 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1411 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1412 | /* Read the end of the PNG file. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1413 | PNG_EXPORT(62, void, png_read_end, (png_structrp png_ptr, png_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1414 | #endif |
| 1415 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1416 | /* Free any memory associated with the png_info_struct */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1417 | PNG_EXPORT(63, void, png_destroy_info_struct, (png_const_structrp png_ptr, |
| 1418 | png_infopp info_ptr_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1419 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1420 | /* Free any memory associated with the png_struct and the png_info_structs */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1421 | PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr, |
| 1422 | png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1423 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1424 | /* Free any memory associated with the png_struct and the png_info_structs */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1425 | PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr, |
| 1426 | png_infopp info_ptr_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1427 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1428 | /* Set the libpng method of handling chunk CRC errors */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1429 | PNG_EXPORT(66, void, png_set_crc_action, (png_structrp png_ptr, int crit_action, |
| 1430 | int ancil_action)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1431 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1432 | /* Values for png_set_crc_action() say how to handle CRC errors in |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1433 | * ancillary and critical chunks, and whether to use the data contained |
| 1434 | * therein. Note that it is impossible to "discard" data in a critical |
| 1435 | * chunk. For versions prior to 0.90, the action was always error/quit, |
| 1436 | * whereas in version 0.90 and later, the action for CRC errors in ancillary |
| 1437 | * chunks is warn/discard. These values should NOT be changed. |
| 1438 | * |
| 1439 | * value action:critical action:ancillary |
| 1440 | */ |
| 1441 | #define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */ |
| 1442 | #define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */ |
| 1443 | #define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */ |
| 1444 | #define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */ |
| 1445 | #define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ |
| 1446 | #define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ |
| 1447 | |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1448 | #ifdef PNG_WRITE_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1449 | /* These functions give the user control over the scan-line filtering in |
| 1450 | * libpng and the compression methods used by zlib. These functions are |
| 1451 | * mainly useful for testing, as the defaults should work with most users. |
| 1452 | * Those users who are tight on memory or want faster performance at the |
| 1453 | * expense of compression can modify them. See the compression library |
| 1454 | * header file (zlib.h) for an explination of the compression functions. |
| 1455 | */ |
| 1456 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1457 | /* Set the filtering method(s) used by libpng. Currently, the only valid |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1458 | * value for "method" is 0. |
| 1459 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1460 | PNG_EXPORT(67, void, png_set_filter, (png_structrp png_ptr, int method, |
| 1461 | int filters)); |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1462 | #endif /* WRITE */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1463 | |
| 1464 | /* Flags for png_set_filter() to say which filters to use. The flags |
| 1465 | * are chosen so that they don't conflict with real filter types |
| 1466 | * below, in case they are supplied instead of the #defined constants. |
| 1467 | * These values should NOT be changed. |
| 1468 | */ |
| 1469 | #define PNG_NO_FILTERS 0x00 |
| 1470 | #define PNG_FILTER_NONE 0x08 |
| 1471 | #define PNG_FILTER_SUB 0x10 |
| 1472 | #define PNG_FILTER_UP 0x20 |
| 1473 | #define PNG_FILTER_AVG 0x40 |
| 1474 | #define PNG_FILTER_PAETH 0x80 |
| 1475 | #define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \ |
| 1476 | PNG_FILTER_AVG | PNG_FILTER_PAETH) |
| 1477 | |
| 1478 | /* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now. |
| 1479 | * These defines should NOT be changed. |
| 1480 | */ |
| 1481 | #define PNG_FILTER_VALUE_NONE 0 |
| 1482 | #define PNG_FILTER_VALUE_SUB 1 |
| 1483 | #define PNG_FILTER_VALUE_UP 2 |
| 1484 | #define PNG_FILTER_VALUE_AVG 3 |
| 1485 | #define PNG_FILTER_VALUE_PAETH 4 |
| 1486 | #define PNG_FILTER_VALUE_LAST 5 |
| 1487 | |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1488 | #ifdef PNG_WRITE_SUPPORTED |
| 1489 | #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* DEPRECATED */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1490 | PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structrp png_ptr, |
| 1491 | int heuristic_method, int num_weights, png_const_doublep filter_weights, |
| 1492 | png_const_doublep filter_costs)) |
| 1493 | PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, |
| 1494 | (png_structrp png_ptr, int heuristic_method, int num_weights, |
| 1495 | png_const_fixed_point_p filter_weights, |
| 1496 | png_const_fixed_point_p filter_costs)) |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1497 | #endif /* WRITE_WEIGHTED_FILTER */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1498 | |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1499 | /* The following are no longer used and will be removed from libpng-1.7: */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1500 | #define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */ |
| 1501 | #define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */ |
| 1502 | #define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ |
| 1503 | #define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ |
| 1504 | |
| 1505 | /* Set the library compression level. Currently, valid values range from |
| 1506 | * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 |
| 1507 | * (0 - no compression, 9 - "maximal" compression). Note that tests have |
| 1508 | * shown that zlib compression levels 3-6 usually perform as well as level 9 |
| 1509 | * for PNG images, and do considerably fewer caclulations. In the future, |
| 1510 | * these values may not correspond directly to the zlib compression levels. |
| 1511 | */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1512 | #ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1513 | PNG_EXPORT(69, void, png_set_compression_level, (png_structrp png_ptr, |
| 1514 | int level)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1515 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1516 | PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structrp png_ptr, |
| 1517 | int mem_level)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1518 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1519 | PNG_EXPORT(71, void, png_set_compression_strategy, (png_structrp png_ptr, |
| 1520 | int strategy)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1521 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1522 | /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a |
| 1523 | * smaller value of window_bits if it can do so safely. |
| 1524 | */ |
| 1525 | PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structrp png_ptr, |
| 1526 | int window_bits)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1527 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1528 | PNG_EXPORT(73, void, png_set_compression_method, (png_structrp png_ptr, |
| 1529 | int method)); |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1530 | #endif /* WRITE_CUSTOMIZE_COMPRESSION */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1531 | |
| 1532 | #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED |
| 1533 | /* Also set zlib parameters for compressing non-IDAT chunks */ |
| 1534 | PNG_EXPORT(222, void, png_set_text_compression_level, (png_structrp png_ptr, |
| 1535 | int level)); |
| 1536 | |
| 1537 | PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structrp png_ptr, |
| 1538 | int mem_level)); |
| 1539 | |
| 1540 | PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structrp png_ptr, |
| 1541 | int strategy)); |
| 1542 | |
| 1543 | /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a |
| 1544 | * smaller value of window_bits if it can do so safely. |
| 1545 | */ |
| 1546 | PNG_EXPORT(225, void, png_set_text_compression_window_bits, |
| 1547 | (png_structrp png_ptr, int window_bits)); |
| 1548 | |
| 1549 | PNG_EXPORT(226, void, png_set_text_compression_method, (png_structrp png_ptr, |
| 1550 | int method)); |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1551 | #endif /* WRITE_CUSTOMIZE_ZTXT_COMPRESSION */ |
| 1552 | #endif /* WRITE */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1553 | |
| 1554 | /* These next functions are called for input/output, memory, and error |
| 1555 | * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, |
| 1556 | * and call standard C I/O routines such as fread(), fwrite(), and |
| 1557 | * fprintf(). These functions can be made to use other I/O routines |
| 1558 | * at run time for those applications that need to handle I/O in a |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1559 | * different manner by calling png_set_???_fn(). See libpng-manual.txt for |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1560 | * more information. |
| 1561 | */ |
| 1562 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1563 | #ifdef PNG_STDIO_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1564 | /* Initialize the input/output for the PNG file to the default functions. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1565 | PNG_EXPORT(74, void, png_init_io, (png_structrp png_ptr, png_FILE_p fp)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1566 | #endif |
| 1567 | |
| 1568 | /* Replace the (error and abort), and warning functions with user |
| 1569 | * supplied functions. If no messages are to be printed you must still |
| 1570 | * write and use replacement functions. The replacement error_fn should |
| 1571 | * still do a longjmp to the last setjmp location if you are using this |
| 1572 | * method of error handling. If error_fn or warning_fn is NULL, the |
| 1573 | * default function will be used. |
| 1574 | */ |
| 1575 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1576 | PNG_EXPORT(75, void, png_set_error_fn, (png_structrp png_ptr, |
| 1577 | png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1578 | |
| 1579 | /* Return the user pointer associated with the error functions */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1580 | PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1581 | |
| 1582 | /* Replace the default data output functions with a user supplied one(s). |
| 1583 | * If buffered output is not used, then output_flush_fn can be set to NULL. |
| 1584 | * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time |
| 1585 | * output_flush_fn will be ignored (and thus can be NULL). |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1586 | * It is probably a mistake to use NULL for output_flush_fn if |
| 1587 | * write_data_fn is not also NULL unless you have built libpng with |
| 1588 | * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's |
| 1589 | * default flush function, which uses the standard *FILE structure, will |
| 1590 | * be used. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1591 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1592 | PNG_EXPORT(77, void, png_set_write_fn, (png_structrp png_ptr, png_voidp io_ptr, |
| 1593 | png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1594 | |
| 1595 | /* Replace the default data input function with a user supplied one. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1596 | PNG_EXPORT(78, void, png_set_read_fn, (png_structrp png_ptr, png_voidp io_ptr, |
| 1597 | png_rw_ptr read_data_fn)); |
Joseph Wen | 4ce0ee1 | 2010-08-20 10:42:22 +0800 | [diff] [blame] | 1598 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1599 | /* Return the user pointer associated with the I/O functions */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1600 | PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_const_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1601 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1602 | PNG_EXPORT(80, void, png_set_read_status_fn, (png_structrp png_ptr, |
| 1603 | png_read_status_ptr read_row_fn)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1604 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1605 | PNG_EXPORT(81, void, png_set_write_status_fn, (png_structrp png_ptr, |
| 1606 | png_write_status_ptr write_row_fn)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1607 | |
| 1608 | #ifdef PNG_USER_MEM_SUPPORTED |
| 1609 | /* Replace the default memory allocation functions with user supplied one(s). */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1610 | PNG_EXPORT(82, void, png_set_mem_fn, (png_structrp png_ptr, png_voidp mem_ptr, |
| 1611 | png_malloc_ptr malloc_fn, png_free_ptr free_fn)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1612 | /* Return the user pointer associated with the memory functions */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1613 | PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1614 | #endif |
| 1615 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1616 | #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED |
| 1617 | PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structrp png_ptr, |
| 1618 | png_user_transform_ptr read_user_transform_fn)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1619 | #endif |
| 1620 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1621 | #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED |
| 1622 | PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structrp png_ptr, |
| 1623 | png_user_transform_ptr write_user_transform_fn)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1624 | #endif |
| 1625 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1626 | #ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED |
| 1627 | PNG_EXPORT(86, void, png_set_user_transform_info, (png_structrp png_ptr, |
| 1628 | png_voidp user_transform_ptr, int user_transform_depth, |
| 1629 | int user_transform_channels)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1630 | /* Return the user pointer associated with the user transform functions */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1631 | PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr, |
| 1632 | (png_const_structrp png_ptr)); |
| 1633 | #endif |
| 1634 | |
| 1635 | #ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED |
| 1636 | /* Return information about the row currently being processed. Note that these |
| 1637 | * APIs do not fail but will return unexpected results if called outside a user |
| 1638 | * transform callback. Also note that when transforming an interlaced image the |
| 1639 | * row number is the row number within the sub-image of the interlace pass, so |
| 1640 | * the value will increase to the height of the sub-image (not the full image) |
| 1641 | * then reset to 0 for the next pass. |
| 1642 | * |
| 1643 | * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to |
| 1644 | * find the output pixel (x,y) given an interlaced sub-image pixel |
| 1645 | * (row,col,pass). (See below for these macros.) |
| 1646 | */ |
| 1647 | PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structrp)); |
| 1648 | PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structrp)); |
| 1649 | #endif |
| 1650 | |
| 1651 | #ifdef PNG_READ_USER_CHUNKS_SUPPORTED |
| 1652 | /* This callback is called only for *unknown* chunks. If |
| 1653 | * PNG_HANDLE_AS_UNKNOWN_SUPPORTED is set then it is possible to set known |
| 1654 | * chunks to be treated as unknown, however in this case the callback must do |
| 1655 | * any processing required by the chunk (e.g. by calling the appropriate |
| 1656 | * png_set_ APIs.) |
| 1657 | * |
| 1658 | * There is no write support - on write, by default, all the chunks in the |
| 1659 | * 'unknown' list are written in the specified position. |
| 1660 | * |
| 1661 | * The integer return from the callback function is interpreted thus: |
| 1662 | * |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1663 | * negative: An error occurred; png_chunk_error will be called. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1664 | * zero: The chunk was not handled, the chunk will be saved. A critical |
| 1665 | * chunk will cause an error at this point unless it is to be saved. |
| 1666 | * positive: The chunk was handled, libpng will ignore/discard it. |
| 1667 | * |
| 1668 | * See "INTERACTION WTIH USER CHUNK CALLBACKS" below for important notes about |
| 1669 | * how this behavior will change in libpng 1.7 |
| 1670 | */ |
| 1671 | PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structrp png_ptr, |
| 1672 | png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1673 | #endif |
| 1674 | |
| 1675 | #ifdef PNG_USER_CHUNKS_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1676 | PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1677 | #endif |
| 1678 | |
| 1679 | #ifdef PNG_PROGRESSIVE_READ_SUPPORTED |
| 1680 | /* Sets the function callbacks for the push reader, and a pointer to a |
| 1681 | * user-defined structure available to the callback functions. |
| 1682 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1683 | PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structrp png_ptr, |
| 1684 | png_voidp progressive_ptr, png_progressive_info_ptr info_fn, |
| 1685 | png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1686 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1687 | /* Returns the user pointer associated with the push read functions */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1688 | PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, |
| 1689 | (png_const_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1690 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1691 | /* Function to be called when data becomes available */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1692 | PNG_EXPORT(92, void, png_process_data, (png_structrp png_ptr, |
| 1693 | png_inforp info_ptr, png_bytep buffer, png_size_t buffer_size)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1694 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1695 | /* A function which may be called *only* within png_process_data to stop the |
| 1696 | * processing of any more data. The function returns the number of bytes |
| 1697 | * remaining, excluding any that libpng has cached internally. A subsequent |
| 1698 | * call to png_process_data must supply these bytes again. If the argument |
| 1699 | * 'save' is set to true the routine will first save all the pending data and |
| 1700 | * will always return 0. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1701 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1702 | PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structrp, int save)); |
| 1703 | |
| 1704 | /* A function which may be called *only* outside (after) a call to |
| 1705 | * png_process_data. It returns the number of bytes of data to skip in the |
| 1706 | * input. Normally it will return 0, but if it returns a non-zero value the |
| 1707 | * application must skip than number of bytes of input data and pass the |
| 1708 | * following data to the next call to png_process_data. |
| 1709 | */ |
| 1710 | PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structrp)); |
| 1711 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1712 | /* Function that combines rows. 'new_row' is a flag that should come from |
| 1713 | * the callback and be non-NULL if anything needs to be done; the library |
| 1714 | * stores its own version of the new data internally and ignores the passed |
| 1715 | * in value. |
| 1716 | */ |
| 1717 | PNG_EXPORT(93, void, png_progressive_combine_row, (png_const_structrp png_ptr, |
| 1718 | png_bytep old_row, png_const_bytep new_row)); |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1719 | #endif /* PROGRESSIVE_READ */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1720 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1721 | PNG_EXPORTA(94, png_voidp, png_malloc, (png_const_structrp png_ptr, |
| 1722 | png_alloc_size_t size), PNG_ALLOCATED); |
| 1723 | /* Added at libpng version 1.4.0 */ |
| 1724 | PNG_EXPORTA(95, png_voidp, png_calloc, (png_const_structrp png_ptr, |
| 1725 | png_alloc_size_t size), PNG_ALLOCATED); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1726 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1727 | /* Added at libpng version 1.2.4 */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1728 | PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_const_structrp png_ptr, |
| 1729 | png_alloc_size_t size), PNG_ALLOCATED); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1730 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1731 | /* Frees a pointer allocated by png_malloc() */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1732 | PNG_EXPORT(97, void, png_free, (png_const_structrp png_ptr, png_voidp ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1733 | |
| 1734 | /* Free data that was allocated internally */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1735 | PNG_EXPORT(98, void, png_free_data, (png_const_structrp png_ptr, |
| 1736 | png_inforp info_ptr, png_uint_32 free_me, int num)); |
| 1737 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1738 | /* Reassign responsibility for freeing existing data, whether allocated |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1739 | * by libpng or by the application; this works on the png_info structure passed |
| 1740 | * in, it does not change the state for other png_info structures. |
| 1741 | * |
| 1742 | * It is unlikely that this function works correctly as of 1.6.0 and using it |
| 1743 | * may result either in memory leaks or double free of allocated data. |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1744 | */ |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 1745 | PNG_EXPORT(99, void, png_data_freer, (png_const_structrp png_ptr, |
| 1746 | png_inforp info_ptr, int freer, png_uint_32 mask)); |
John Reck | 90bf0d2 | 2013-08-14 10:37:42 -0700 | [diff] [blame] | 1747 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1748 | /* Assignments for png_data_freer */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1749 | #define PNG_DESTROY_WILL_FREE_DATA 1 |
| 1750 | #define PNG_SET_WILL_FREE_DATA 1 |
| 1751 | #define PNG_USER_WILL_FREE_DATA 2 |
| 1752 | /* Flags for png_ptr->free_me and info_ptr->free_me */ |
| 1753 | #define PNG_FREE_HIST 0x0008 |
| 1754 | #define PNG_FREE_ICCP 0x0010 |
| 1755 | #define PNG_FREE_SPLT 0x0020 |
| 1756 | #define PNG_FREE_ROWS 0x0040 |
| 1757 | #define PNG_FREE_PCAL 0x0080 |
| 1758 | #define PNG_FREE_SCAL 0x0100 |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1759 | #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED |
| 1760 | # define PNG_FREE_UNKN 0x0200 |
| 1761 | #endif |
| 1762 | /* PNG_FREE_LIST 0x0400 removed in 1.6.0 because it is ignored */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1763 | #define PNG_FREE_PLTE 0x1000 |
| 1764 | #define PNG_FREE_TRNS 0x2000 |
| 1765 | #define PNG_FREE_TEXT 0x4000 |
| 1766 | #define PNG_FREE_ALL 0x7fff |
| 1767 | #define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ |
| 1768 | |
| 1769 | #ifdef PNG_USER_MEM_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1770 | PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_const_structrp png_ptr, |
| 1771 | png_alloc_size_t size), PNG_ALLOCATED PNG_DEPRECATED); |
| 1772 | PNG_EXPORTA(101, void, png_free_default, (png_const_structrp png_ptr, |
| 1773 | png_voidp ptr), PNG_DEPRECATED); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1774 | #endif |
| 1775 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1776 | #ifdef PNG_ERROR_TEXT_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1777 | /* Fatal error in PNG image of libpng - can't continue */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1778 | PNG_EXPORTA(102, void, png_error, (png_const_structrp png_ptr, |
| 1779 | png_const_charp error_message), PNG_NORETURN); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1780 | |
| 1781 | /* The same, but the chunk name is prepended to the error string. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1782 | PNG_EXPORTA(103, void, png_chunk_error, (png_const_structrp png_ptr, |
| 1783 | png_const_charp error_message), PNG_NORETURN); |
| 1784 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1785 | #else |
| 1786 | /* Fatal error in PNG image of libpng - can't continue */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1787 | PNG_EXPORTA(104, void, png_err, (png_const_structrp png_ptr), PNG_NORETURN); |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 1788 | # define png_error(s1,s2) png_err(s1) |
| 1789 | # define png_chunk_error(s1,s2) png_err(s1) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1790 | #endif |
| 1791 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1792 | #ifdef PNG_WARNINGS_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1793 | /* Non-fatal error in libpng. Can continue, but may have a problem. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1794 | PNG_EXPORT(105, void, png_warning, (png_const_structrp png_ptr, |
| 1795 | png_const_charp warning_message)); |
| 1796 | |
| 1797 | /* Non-fatal error in libpng, chunk name is prepended to message. */ |
| 1798 | PNG_EXPORT(106, void, png_chunk_warning, (png_const_structrp png_ptr, |
| 1799 | png_const_charp warning_message)); |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 1800 | #else |
| 1801 | # define png_warning(s1,s2) ((void)(s1)) |
| 1802 | # define png_chunk_warning(s1,s2) ((void)(s1)) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1803 | #endif |
| 1804 | |
| 1805 | #ifdef PNG_BENIGN_ERRORS_SUPPORTED |
| 1806 | /* Benign error in libpng. Can continue, but may have a problem. |
| 1807 | * User can choose whether to handle as a fatal error or as a warning. */ |
| 1808 | PNG_EXPORT(107, void, png_benign_error, (png_const_structrp png_ptr, |
| 1809 | png_const_charp warning_message)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1810 | |
| 1811 | #ifdef PNG_READ_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1812 | /* Same, chunk name is prepended to message (only during read) */ |
| 1813 | PNG_EXPORT(108, void, png_chunk_benign_error, (png_const_structrp png_ptr, |
| 1814 | png_const_charp warning_message)); |
| 1815 | #endif |
| 1816 | |
| 1817 | PNG_EXPORT(109, void, png_set_benign_errors, |
| 1818 | (png_structrp png_ptr, int allowed)); |
| 1819 | #else |
| 1820 | # ifdef PNG_ALLOW_BENIGN_ERRORS |
| 1821 | # define png_benign_error png_warning |
| 1822 | # define png_chunk_benign_error png_chunk_warning |
| 1823 | # else |
| 1824 | # define png_benign_error png_error |
| 1825 | # define png_chunk_benign_error png_chunk_error |
| 1826 | # endif |
| 1827 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1828 | |
| 1829 | /* The png_set_<chunk> functions are for storing values in the png_info_struct. |
| 1830 | * Similarly, the png_get_<chunk> calls are used to read values from the |
| 1831 | * png_info_struct, either storing the parameters in the passed variables, or |
| 1832 | * setting pointers into the png_info_struct where the data is stored. The |
| 1833 | * png_get_<chunk> functions return a non-zero value if the data was available |
| 1834 | * in info_ptr, or return zero and do not change any of the parameters if the |
| 1835 | * data was not available. |
| 1836 | * |
| 1837 | * These functions should be used instead of directly accessing png_info |
| 1838 | * to avoid problems with future changes in the size and internal layout of |
| 1839 | * png_info_struct. |
| 1840 | */ |
| 1841 | /* Returns "flag" if chunk data is valid in info_ptr. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1842 | PNG_EXPORT(110, png_uint_32, png_get_valid, (png_const_structrp png_ptr, |
| 1843 | png_const_inforp info_ptr, png_uint_32 flag)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1844 | |
| 1845 | /* Returns number of bytes needed to hold a transformed row. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1846 | PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structrp png_ptr, |
| 1847 | png_const_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1848 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1849 | #ifdef PNG_INFO_IMAGE_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1850 | /* Returns row_pointers, which is an array of pointers to scanlines that was |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1851 | * returned from png_read_png(). |
| 1852 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1853 | PNG_EXPORT(112, png_bytepp, png_get_rows, (png_const_structrp png_ptr, |
| 1854 | png_const_inforp info_ptr)); |
| 1855 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1856 | /* Set row_pointers, which is an array of pointers to scanlines for use |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 1857 | * by png_write_png(). |
| 1858 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1859 | PNG_EXPORT(113, void, png_set_rows, (png_const_structrp png_ptr, |
| 1860 | png_inforp info_ptr, png_bytepp row_pointers)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1861 | #endif |
| 1862 | |
| 1863 | /* Returns number of color channels in image. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1864 | PNG_EXPORT(114, png_byte, png_get_channels, (png_const_structrp png_ptr, |
| 1865 | png_const_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1866 | |
| 1867 | #ifdef PNG_EASY_ACCESS_SUPPORTED |
| 1868 | /* Returns image width in pixels. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1869 | PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structrp png_ptr, |
| 1870 | png_const_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1871 | |
| 1872 | /* Returns image height in pixels. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1873 | PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structrp png_ptr, |
| 1874 | png_const_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1875 | |
| 1876 | /* Returns image bit_depth. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1877 | PNG_EXPORT(117, png_byte, png_get_bit_depth, (png_const_structrp png_ptr, |
| 1878 | png_const_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1879 | |
| 1880 | /* Returns image color_type. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1881 | PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structrp png_ptr, |
| 1882 | png_const_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1883 | |
| 1884 | /* Returns image filter_type. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1885 | PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structrp png_ptr, |
| 1886 | png_const_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1887 | |
| 1888 | /* Returns image interlace_type. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1889 | PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structrp png_ptr, |
| 1890 | png_const_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1891 | |
| 1892 | /* Returns image compression_type. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1893 | PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structrp png_ptr, |
| 1894 | png_const_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1895 | |
| 1896 | /* Returns image resolution in pixels per meter, from pHYs chunk data. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1897 | PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter, |
| 1898 | (png_const_structrp png_ptr, png_const_inforp info_ptr)); |
| 1899 | PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter, |
| 1900 | (png_const_structrp png_ptr, png_const_inforp info_ptr)); |
| 1901 | PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter, |
| 1902 | (png_const_structrp png_ptr, png_const_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1903 | |
| 1904 | /* Returns pixel aspect ratio, computed from pHYs chunk data. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1905 | PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio, |
| 1906 | (png_const_structrp png_ptr, png_const_inforp info_ptr)) |
| 1907 | PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed, |
| 1908 | (png_const_structrp png_ptr, png_const_inforp info_ptr)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1909 | |
| 1910 | /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1911 | PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels, |
| 1912 | (png_const_structrp png_ptr, png_const_inforp info_ptr)); |
| 1913 | PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels, |
| 1914 | (png_const_structrp png_ptr, png_const_inforp info_ptr)); |
| 1915 | PNG_EXPORT(128, png_int_32, png_get_x_offset_microns, |
| 1916 | (png_const_structrp png_ptr, png_const_inforp info_ptr)); |
| 1917 | PNG_EXPORT(129, png_int_32, png_get_y_offset_microns, |
| 1918 | (png_const_structrp png_ptr, png_const_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1919 | |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 1920 | #endif /* EASY_ACCESS */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1921 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1922 | #ifdef PNG_READ_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1923 | /* Returns pointer to signature string read from PNG header */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1924 | PNG_EXPORT(130, png_const_bytep, png_get_signature, (png_const_structrp png_ptr, |
| 1925 | png_const_inforp info_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1926 | #endif |
| 1927 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1928 | #ifdef PNG_bKGD_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1929 | PNG_EXPORT(131, png_uint_32, png_get_bKGD, (png_const_structrp png_ptr, |
| 1930 | png_inforp info_ptr, png_color_16p *background)); |
| 1931 | #endif |
| 1932 | |
| 1933 | #ifdef PNG_bKGD_SUPPORTED |
| 1934 | PNG_EXPORT(132, void, png_set_bKGD, (png_const_structrp png_ptr, |
| 1935 | png_inforp info_ptr, png_const_color_16p background)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1936 | #endif |
| 1937 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1938 | #ifdef PNG_cHRM_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1939 | PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structrp png_ptr, |
| 1940 | png_const_inforp info_ptr, double *white_x, double *white_y, double *red_x, |
| 1941 | double *red_y, double *green_x, double *green_y, double *blue_x, |
| 1942 | double *blue_y)) |
| 1943 | PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_const_structrp png_ptr, |
| 1944 | png_const_inforp info_ptr, double *red_X, double *red_Y, double *red_Z, |
| 1945 | double *green_X, double *green_Y, double *green_Z, double *blue_X, |
| 1946 | double *blue_Y, double *blue_Z)) |
| 1947 | PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed, |
| 1948 | (png_const_structrp png_ptr, png_const_inforp info_ptr, |
| 1949 | png_fixed_point *int_white_x, png_fixed_point *int_white_y, |
| 1950 | png_fixed_point *int_red_x, png_fixed_point *int_red_y, |
| 1951 | png_fixed_point *int_green_x, png_fixed_point *int_green_y, |
| 1952 | png_fixed_point *int_blue_x, png_fixed_point *int_blue_y)) |
| 1953 | PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed, |
| 1954 | (png_const_structrp png_ptr, png_const_inforp info_ptr, |
| 1955 | png_fixed_point *int_red_X, png_fixed_point *int_red_Y, |
| 1956 | png_fixed_point *int_red_Z, png_fixed_point *int_green_X, |
| 1957 | png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, |
| 1958 | png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, |
| 1959 | png_fixed_point *int_blue_Z)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1960 | #endif |
| 1961 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1962 | #ifdef PNG_cHRM_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1963 | PNG_FP_EXPORT(135, void, png_set_cHRM, (png_const_structrp png_ptr, |
| 1964 | png_inforp info_ptr, |
| 1965 | double white_x, double white_y, double red_x, double red_y, double green_x, |
| 1966 | double green_y, double blue_x, double blue_y)) |
| 1967 | PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_const_structrp png_ptr, |
| 1968 | png_inforp info_ptr, double red_X, double red_Y, double red_Z, |
| 1969 | double green_X, double green_Y, double green_Z, double blue_X, |
| 1970 | double blue_Y, double blue_Z)) |
| 1971 | PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_const_structrp png_ptr, |
| 1972 | png_inforp info_ptr, png_fixed_point int_white_x, |
| 1973 | png_fixed_point int_white_y, png_fixed_point int_red_x, |
| 1974 | png_fixed_point int_red_y, png_fixed_point int_green_x, |
| 1975 | png_fixed_point int_green_y, png_fixed_point int_blue_x, |
| 1976 | png_fixed_point int_blue_y)) |
| 1977 | PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_const_structrp png_ptr, |
| 1978 | png_inforp info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, |
| 1979 | png_fixed_point int_red_Z, png_fixed_point int_green_X, |
| 1980 | png_fixed_point int_green_Y, png_fixed_point int_green_Z, |
| 1981 | png_fixed_point int_blue_X, png_fixed_point int_blue_Y, |
| 1982 | png_fixed_point int_blue_Z)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1983 | #endif |
| 1984 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1985 | #ifdef PNG_gAMA_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1986 | PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, (png_const_structrp png_ptr, |
| 1987 | png_const_inforp info_ptr, double *file_gamma)) |
| 1988 | PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed, |
| 1989 | (png_const_structrp png_ptr, png_const_inforp info_ptr, |
| 1990 | png_fixed_point *int_file_gamma)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1991 | #endif |
| 1992 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 1993 | #ifdef PNG_gAMA_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 1994 | PNG_FP_EXPORT(139, void, png_set_gAMA, (png_const_structrp png_ptr, |
| 1995 | png_inforp info_ptr, double file_gamma)) |
| 1996 | PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_const_structrp png_ptr, |
| 1997 | png_inforp info_ptr, png_fixed_point int_file_gamma)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1998 | #endif |
| 1999 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2000 | #ifdef PNG_hIST_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2001 | PNG_EXPORT(141, png_uint_32, png_get_hIST, (png_const_structrp png_ptr, |
| 2002 | png_inforp info_ptr, png_uint_16p *hist)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2003 | #endif |
| 2004 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2005 | #ifdef PNG_hIST_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2006 | PNG_EXPORT(142, void, png_set_hIST, (png_const_structrp png_ptr, |
| 2007 | png_inforp info_ptr, png_const_uint_16p hist)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2008 | #endif |
| 2009 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2010 | PNG_EXPORT(143, png_uint_32, png_get_IHDR, (png_const_structrp png_ptr, |
| 2011 | png_const_inforp info_ptr, png_uint_32 *width, png_uint_32 *height, |
| 2012 | int *bit_depth, int *color_type, int *interlace_method, |
| 2013 | int *compression_method, int *filter_method)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2014 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2015 | PNG_EXPORT(144, void, png_set_IHDR, (png_const_structrp png_ptr, |
| 2016 | png_inforp info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, |
| 2017 | int color_type, int interlace_method, int compression_method, |
| 2018 | int filter_method)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2019 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2020 | #ifdef PNG_oFFs_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2021 | PNG_EXPORT(145, png_uint_32, png_get_oFFs, (png_const_structrp png_ptr, |
| 2022 | png_const_inforp info_ptr, png_int_32 *offset_x, png_int_32 *offset_y, |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2023 | int *unit_type)); |
| 2024 | #endif |
| 2025 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2026 | #ifdef PNG_oFFs_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2027 | PNG_EXPORT(146, void, png_set_oFFs, (png_const_structrp png_ptr, |
| 2028 | png_inforp info_ptr, png_int_32 offset_x, png_int_32 offset_y, |
| 2029 | int unit_type)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2030 | #endif |
| 2031 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2032 | #ifdef PNG_pCAL_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2033 | PNG_EXPORT(147, png_uint_32, png_get_pCAL, (png_const_structrp png_ptr, |
| 2034 | png_inforp info_ptr, png_charp *purpose, png_int_32 *X0, |
| 2035 | png_int_32 *X1, int *type, int *nparams, png_charp *units, |
| 2036 | png_charpp *params)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2037 | #endif |
| 2038 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2039 | #ifdef PNG_pCAL_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2040 | PNG_EXPORT(148, void, png_set_pCAL, (png_const_structrp png_ptr, |
| 2041 | png_inforp info_ptr, png_const_charp purpose, png_int_32 X0, png_int_32 X1, |
| 2042 | int type, int nparams, png_const_charp units, png_charpp params)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2043 | #endif |
| 2044 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2045 | #ifdef PNG_pHYs_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2046 | PNG_EXPORT(149, png_uint_32, png_get_pHYs, (png_const_structrp png_ptr, |
| 2047 | png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, |
| 2048 | int *unit_type)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2049 | #endif |
| 2050 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2051 | #ifdef PNG_pHYs_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2052 | PNG_EXPORT(150, void, png_set_pHYs, (png_const_structrp png_ptr, |
| 2053 | png_inforp info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2054 | #endif |
| 2055 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2056 | PNG_EXPORT(151, png_uint_32, png_get_PLTE, (png_const_structrp png_ptr, |
| 2057 | png_inforp info_ptr, png_colorp *palette, int *num_palette)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2058 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2059 | PNG_EXPORT(152, void, png_set_PLTE, (png_structrp png_ptr, |
| 2060 | png_inforp info_ptr, png_const_colorp palette, int num_palette)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2061 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2062 | #ifdef PNG_sBIT_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2063 | PNG_EXPORT(153, png_uint_32, png_get_sBIT, (png_const_structrp png_ptr, |
| 2064 | png_inforp info_ptr, png_color_8p *sig_bit)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2065 | #endif |
| 2066 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2067 | #ifdef PNG_sBIT_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2068 | PNG_EXPORT(154, void, png_set_sBIT, (png_const_structrp png_ptr, |
| 2069 | png_inforp info_ptr, png_const_color_8p sig_bit)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2070 | #endif |
| 2071 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2072 | #ifdef PNG_sRGB_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2073 | PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structrp png_ptr, |
| 2074 | png_const_inforp info_ptr, int *file_srgb_intent)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2075 | #endif |
| 2076 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2077 | #ifdef PNG_sRGB_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2078 | PNG_EXPORT(156, void, png_set_sRGB, (png_const_structrp png_ptr, |
| 2079 | png_inforp info_ptr, int srgb_intent)); |
| 2080 | PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_const_structrp png_ptr, |
| 2081 | png_inforp info_ptr, int srgb_intent)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2082 | #endif |
| 2083 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2084 | #ifdef PNG_iCCP_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2085 | PNG_EXPORT(158, png_uint_32, png_get_iCCP, (png_const_structrp png_ptr, |
| 2086 | png_inforp info_ptr, png_charpp name, int *compression_type, |
| 2087 | png_bytepp profile, png_uint_32 *proflen)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2088 | #endif |
| 2089 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2090 | #ifdef PNG_iCCP_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2091 | PNG_EXPORT(159, void, png_set_iCCP, (png_const_structrp png_ptr, |
| 2092 | png_inforp info_ptr, png_const_charp name, int compression_type, |
| 2093 | png_const_bytep profile, png_uint_32 proflen)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2094 | #endif |
| 2095 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2096 | #ifdef PNG_sPLT_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2097 | PNG_EXPORT(160, int, png_get_sPLT, (png_const_structrp png_ptr, |
| 2098 | png_inforp info_ptr, png_sPLT_tpp entries)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2099 | #endif |
| 2100 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2101 | #ifdef PNG_sPLT_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2102 | PNG_EXPORT(161, void, png_set_sPLT, (png_const_structrp png_ptr, |
| 2103 | png_inforp info_ptr, png_const_sPLT_tp entries, int nentries)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2104 | #endif |
| 2105 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2106 | #ifdef PNG_TEXT_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2107 | /* png_get_text also returns the number of text chunks in *num_text */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2108 | PNG_EXPORT(162, int, png_get_text, (png_const_structrp png_ptr, |
| 2109 | png_inforp info_ptr, png_textp *text_ptr, int *num_text)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2110 | #endif |
| 2111 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2112 | /* Note while png_set_text() will accept a structure whose text, |
| 2113 | * language, and translated keywords are NULL pointers, the structure |
| 2114 | * returned by png_get_text will always contain regular |
| 2115 | * zero-terminated C strings. They might be empty strings but |
| 2116 | * they will never be NULL pointers. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2117 | */ |
| 2118 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2119 | #ifdef PNG_TEXT_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2120 | PNG_EXPORT(163, void, png_set_text, (png_const_structrp png_ptr, |
| 2121 | png_inforp info_ptr, png_const_textp text_ptr, int num_text)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2122 | #endif |
| 2123 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2124 | #ifdef PNG_tIME_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2125 | PNG_EXPORT(164, png_uint_32, png_get_tIME, (png_const_structrp png_ptr, |
| 2126 | png_inforp info_ptr, png_timep *mod_time)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2127 | #endif |
| 2128 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2129 | #ifdef PNG_tIME_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2130 | PNG_EXPORT(165, void, png_set_tIME, (png_const_structrp png_ptr, |
| 2131 | png_inforp info_ptr, png_const_timep mod_time)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2132 | #endif |
| 2133 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2134 | #ifdef PNG_tRNS_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2135 | PNG_EXPORT(166, png_uint_32, png_get_tRNS, (png_const_structrp png_ptr, |
| 2136 | png_inforp info_ptr, png_bytep *trans_alpha, int *num_trans, |
| 2137 | png_color_16p *trans_color)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2138 | #endif |
| 2139 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2140 | #ifdef PNG_tRNS_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2141 | PNG_EXPORT(167, void, png_set_tRNS, (png_structrp png_ptr, |
| 2142 | png_inforp info_ptr, png_const_bytep trans_alpha, int num_trans, |
| 2143 | png_const_color_16p trans_color)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2144 | #endif |
| 2145 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2146 | #ifdef PNG_sCAL_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2147 | PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, (png_const_structrp png_ptr, |
| 2148 | png_const_inforp info_ptr, int *unit, double *width, double *height)) |
| 2149 | #if defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) || \ |
| 2150 | defined(PNG_FLOATING_POINT_SUPPORTED) |
| 2151 | /* NOTE: this API is currently implemented using floating point arithmetic, |
| 2152 | * consequently it can only be used on systems with floating point support. |
| 2153 | * In any case the range of values supported by png_fixed_point is small and it |
| 2154 | * is highly recommended that png_get_sCAL_s be used instead. |
| 2155 | */ |
| 2156 | PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed, |
| 2157 | (png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, |
| 2158 | png_fixed_point *width, png_fixed_point *height)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2159 | #endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2160 | PNG_EXPORT(169, png_uint_32, png_get_sCAL_s, |
| 2161 | (png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit, |
| 2162 | png_charpp swidth, png_charpp sheight)); |
| 2163 | |
| 2164 | PNG_FP_EXPORT(170, void, png_set_sCAL, (png_const_structrp png_ptr, |
| 2165 | png_inforp info_ptr, int unit, double width, double height)) |
| 2166 | PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_const_structrp png_ptr, |
| 2167 | png_inforp info_ptr, int unit, png_fixed_point width, |
| 2168 | png_fixed_point height)) |
| 2169 | PNG_EXPORT(171, void, png_set_sCAL_s, (png_const_structrp png_ptr, |
| 2170 | png_inforp info_ptr, int unit, |
| 2171 | png_const_charp swidth, png_const_charp sheight)); |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2172 | #endif /* sCAL */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2173 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2174 | #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED |
| 2175 | /* Provide the default handling for all unknown chunks or, optionally, for |
| 2176 | * specific unknown chunks. |
| 2177 | * |
| 2178 | * NOTE: prior to 1.6.0 the handling specified for particular chunks on read was |
| 2179 | * ignored and the default was used, the per-chunk setting only had an effect on |
| 2180 | * write. If you wish to have chunk-specific handling on read in code that must |
| 2181 | * work on earlier versions you must use a user chunk callback to specify the |
| 2182 | * desired handling (keep or discard.) |
| 2183 | * |
| 2184 | * The 'keep' parameter is a PNG_HANDLE_CHUNK_ value as listed below. The |
| 2185 | * parameter is interpreted as follows: |
| 2186 | * |
| 2187 | * READ: |
| 2188 | * PNG_HANDLE_CHUNK_AS_DEFAULT: |
| 2189 | * Known chunks: do normal libpng processing, do not keep the chunk (but |
| 2190 | * see the comments below about PNG_HANDLE_AS_UNKNOWN_SUPPORTED) |
| 2191 | * Unknown chunks: for a specific chunk use the global default, when used |
| 2192 | * as the default discard the chunk data. |
| 2193 | * PNG_HANDLE_CHUNK_NEVER: |
| 2194 | * Discard the chunk data. |
| 2195 | * PNG_HANDLE_CHUNK_IF_SAFE: |
| 2196 | * Keep the chunk data if the chunk is not critical else raise a chunk |
| 2197 | * error. |
| 2198 | * PNG_HANDLE_CHUNK_ALWAYS: |
| 2199 | * Keep the chunk data. |
| 2200 | * |
| 2201 | * If the chunk data is saved it can be retrieved using png_get_unknown_chunks, |
| 2202 | * below. Notice that specifying "AS_DEFAULT" as a global default is equivalent |
| 2203 | * to specifying "NEVER", however when "AS_DEFAULT" is used for specific chunks |
| 2204 | * it simply resets the behavior to the libpng default. |
| 2205 | * |
| 2206 | * INTERACTION WTIH USER CHUNK CALLBACKS: |
| 2207 | * The per-chunk handling is always used when there is a png_user_chunk_ptr |
| 2208 | * callback and the callback returns 0; the chunk is then always stored *unless* |
| 2209 | * it is critical and the per-chunk setting is other than ALWAYS. Notice that |
| 2210 | * the global default is *not* used in this case. (In effect the per-chunk |
| 2211 | * value is incremented to at least IF_SAFE.) |
| 2212 | * |
| 2213 | * IMPORTANT NOTE: this behavior will change in libpng 1.7 - the global and |
| 2214 | * per-chunk defaults will be honored. If you want to preserve the current |
| 2215 | * behavior when your callback returns 0 you must set PNG_HANDLE_CHUNK_IF_SAFE |
| 2216 | * as the default - if you don't do this libpng 1.6 will issue a warning. |
| 2217 | * |
| 2218 | * If you want unhandled unknown chunks to be discarded in libpng 1.6 and |
| 2219 | * earlier simply return '1' (handled). |
| 2220 | * |
| 2221 | * PNG_HANDLE_AS_UNKNOWN_SUPPORTED: |
| 2222 | * If this is *not* set known chunks will always be handled by libpng and |
| 2223 | * will never be stored in the unknown chunk list. Known chunks listed to |
| 2224 | * png_set_keep_unknown_chunks will have no effect. If it is set then known |
| 2225 | * chunks listed with a keep other than AS_DEFAULT will *never* be processed |
| 2226 | * by libpng, in addition critical chunks must either be processed by the |
| 2227 | * callback or saved. |
| 2228 | * |
| 2229 | * The IHDR and IEND chunks must not be listed. Because this turns off the |
| 2230 | * default handling for chunks that would otherwise be recognized the |
| 2231 | * behavior of libpng transformations may well become incorrect! |
| 2232 | * |
| 2233 | * WRITE: |
| 2234 | * When writing chunks the options only apply to the chunks specified by |
| 2235 | * png_set_unknown_chunks (below), libpng will *always* write known chunks |
| 2236 | * required by png_set_ calls and will always write the core critical chunks |
| 2237 | * (as required for PLTE). |
| 2238 | * |
| 2239 | * Each chunk in the png_set_unknown_chunks list is looked up in the |
| 2240 | * png_set_keep_unknown_chunks list to find the keep setting, this is then |
| 2241 | * interpreted as follows: |
| 2242 | * |
| 2243 | * PNG_HANDLE_CHUNK_AS_DEFAULT: |
| 2244 | * Write safe-to-copy chunks and write other chunks if the global |
| 2245 | * default is set to _ALWAYS, otherwise don't write this chunk. |
| 2246 | * PNG_HANDLE_CHUNK_NEVER: |
| 2247 | * Do not write the chunk. |
| 2248 | * PNG_HANDLE_CHUNK_IF_SAFE: |
| 2249 | * Write the chunk if it is safe-to-copy, otherwise do not write it. |
| 2250 | * PNG_HANDLE_CHUNK_ALWAYS: |
| 2251 | * Write the chunk. |
| 2252 | * |
| 2253 | * Note that the default behavior is effectively the opposite of the read case - |
| 2254 | * in read unknown chunks are not stored by default, in write they are written |
| 2255 | * by default. Also the behavior of PNG_HANDLE_CHUNK_IF_SAFE is very different |
| 2256 | * - on write the safe-to-copy bit is checked, on read the critical bit is |
| 2257 | * checked and on read if the chunk is critical an error will be raised. |
| 2258 | * |
| 2259 | * num_chunks: |
| 2260 | * =========== |
| 2261 | * If num_chunks is positive, then the "keep" parameter specifies the manner |
| 2262 | * for handling only those chunks appearing in the chunk_list array, |
| 2263 | * otherwise the chunk list array is ignored. |
| 2264 | * |
| 2265 | * If num_chunks is 0 the "keep" parameter specifies the default behavior for |
| 2266 | * unknown chunks, as described above. |
| 2267 | * |
| 2268 | * If num_chunks is negative, then the "keep" parameter specifies the manner |
| 2269 | * for handling all unknown chunks plus all chunks recognized by libpng |
| 2270 | * except for the IHDR, PLTE, tRNS, IDAT, and IEND chunks (which continue to |
| 2271 | * be processed by libpng. |
| 2272 | */ |
| 2273 | PNG_EXPORT(172, void, png_set_keep_unknown_chunks, (png_structrp png_ptr, |
| 2274 | int keep, png_const_bytep chunk_list, int num_chunks)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2275 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2276 | /* The "keep" PNG_HANDLE_CHUNK_ parameter for the specified chunk is returned; |
| 2277 | * the result is therefore true (non-zero) if special handling is required, |
| 2278 | * false for the default handling. |
| 2279 | */ |
| 2280 | PNG_EXPORT(173, int, png_handle_as_unknown, (png_const_structrp png_ptr, |
| 2281 | png_const_bytep chunk_name)); |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 2282 | #endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2283 | |
| 2284 | #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED |
| 2285 | PNG_EXPORT(174, void, png_set_unknown_chunks, (png_const_structrp png_ptr, |
| 2286 | png_inforp info_ptr, png_const_unknown_chunkp unknowns, |
| 2287 | int num_unknowns)); |
| 2288 | /* NOTE: prior to 1.6.0 this routine set the 'location' field of the added |
| 2289 | * unknowns to the location currently stored in the png_struct. This is |
| 2290 | * invariably the wrong value on write. To fix this call the following API |
| 2291 | * for each chunk in the list with the correct location. If you know your |
| 2292 | * code won't be compiled on earlier versions you can rely on |
| 2293 | * png_set_unknown_chunks(write-ptr, png_get_unknown_chunks(read-ptr)) doing |
| 2294 | * the correct thing. |
| 2295 | */ |
| 2296 | |
| 2297 | PNG_EXPORT(175, void, png_set_unknown_chunk_location, |
| 2298 | (png_const_structrp png_ptr, png_inforp info_ptr, int chunk, int location)); |
| 2299 | |
| 2300 | PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structrp png_ptr, |
| 2301 | png_inforp info_ptr, png_unknown_chunkpp entries)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2302 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2303 | |
| 2304 | /* Png_free_data() will turn off the "valid" flag for anything it frees. |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 2305 | * If you need to turn it off for a chunk that your application has freed, |
| 2306 | * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); |
| 2307 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2308 | PNG_EXPORT(177, void, png_set_invalid, (png_const_structrp png_ptr, |
| 2309 | png_inforp info_ptr, int mask)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2310 | |
Patrick Scott | 5f6bd84 | 2010-06-28 16:55:16 -0400 | [diff] [blame] | 2311 | #ifdef PNG_INFO_IMAGE_SUPPORTED |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2312 | /* The "params" pointer is currently not used and is for future expansion. */ |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 2313 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2314 | PNG_EXPORT(178, void, png_read_png, (png_structrp png_ptr, png_inforp info_ptr, |
| 2315 | int transforms, png_voidp params)); |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 2316 | #endif |
| 2317 | #ifdef PNG_WRITE_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2318 | PNG_EXPORT(179, void, png_write_png, (png_structrp png_ptr, png_inforp info_ptr, |
| 2319 | int transforms, png_voidp params)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2320 | #endif |
Sireesh Tripurari | b478e66 | 2014-05-09 15:15:10 +0530 | [diff] [blame] | 2321 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2322 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2323 | PNG_EXPORT(180, png_const_charp, png_get_copyright, |
| 2324 | (png_const_structrp png_ptr)); |
| 2325 | PNG_EXPORT(181, png_const_charp, png_get_header_ver, |
| 2326 | (png_const_structrp png_ptr)); |
| 2327 | PNG_EXPORT(182, png_const_charp, png_get_header_version, |
| 2328 | (png_const_structrp png_ptr)); |
| 2329 | PNG_EXPORT(183, png_const_charp, png_get_libpng_ver, |
| 2330 | (png_const_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2331 | |
| 2332 | #ifdef PNG_MNG_FEATURES_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2333 | PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structrp png_ptr, |
| 2334 | png_uint_32 mng_features_permitted)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2335 | #endif |
| 2336 | |
| 2337 | /* For use in png_set_keep_unknown, added to version 1.2.6 */ |
| 2338 | #define PNG_HANDLE_CHUNK_AS_DEFAULT 0 |
| 2339 | #define PNG_HANDLE_CHUNK_NEVER 1 |
| 2340 | #define PNG_HANDLE_CHUNK_IF_SAFE 2 |
| 2341 | #define PNG_HANDLE_CHUNK_ALWAYS 3 |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2342 | #define PNG_HANDLE_CHUNK_LAST 4 |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2343 | |
| 2344 | /* Strip the prepended error numbers ("#nnn ") from error and warning |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 2345 | * messages before passing them to the error or warning handler. |
| 2346 | */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2347 | #ifdef PNG_ERROR_NUMBERS_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2348 | PNG_EXPORT(185, void, png_set_strip_error_numbers, (png_structrp png_ptr, |
| 2349 | png_uint_32 strip_mode)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2350 | #endif |
| 2351 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2352 | /* Added in libpng-1.2.6 */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2353 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2354 | PNG_EXPORT(186, void, png_set_user_limits, (png_structrp png_ptr, |
| 2355 | png_uint_32 user_width_max, png_uint_32 user_height_max)); |
| 2356 | PNG_EXPORT(187, png_uint_32, png_get_user_width_max, |
| 2357 | (png_const_structrp png_ptr)); |
| 2358 | PNG_EXPORT(188, png_uint_32, png_get_user_height_max, |
| 2359 | (png_const_structrp png_ptr)); |
| 2360 | /* Added in libpng-1.4.0 */ |
| 2361 | PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structrp png_ptr, |
| 2362 | png_uint_32 user_chunk_cache_max)); |
| 2363 | PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max, |
| 2364 | (png_const_structrp png_ptr)); |
| 2365 | /* Added in libpng-1.4.1 */ |
| 2366 | PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structrp png_ptr, |
| 2367 | png_alloc_size_t user_chunk_cache_max)); |
| 2368 | PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max, |
| 2369 | (png_const_structrp png_ptr)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2370 | #endif |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2371 | |
| 2372 | #if defined(PNG_INCH_CONVERSIONS_SUPPORTED) |
| 2373 | PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch, |
| 2374 | (png_const_structrp png_ptr, png_const_inforp info_ptr)); |
| 2375 | |
| 2376 | PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch, |
| 2377 | (png_const_structrp png_ptr, png_const_inforp info_ptr)); |
| 2378 | |
| 2379 | PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch, |
| 2380 | (png_const_structrp png_ptr, png_const_inforp info_ptr)); |
| 2381 | |
| 2382 | PNG_FP_EXPORT(196, float, png_get_x_offset_inches, |
| 2383 | (png_const_structrp png_ptr, png_const_inforp info_ptr)) |
| 2384 | #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ |
| 2385 | PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed, |
| 2386 | (png_const_structrp png_ptr, png_const_inforp info_ptr)) |
| 2387 | #endif |
| 2388 | |
| 2389 | PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structrp png_ptr, |
| 2390 | png_const_inforp info_ptr)) |
| 2391 | #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ |
| 2392 | PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed, |
| 2393 | (png_const_structrp png_ptr, png_const_inforp info_ptr)) |
| 2394 | #endif |
| 2395 | |
| 2396 | # ifdef PNG_pHYs_SUPPORTED |
| 2397 | PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structrp png_ptr, |
| 2398 | png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, |
| 2399 | int *unit_type)); |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2400 | # endif /* pHYs */ |
| 2401 | #endif /* INCH_CONVERSIONS */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2402 | |
| 2403 | /* Added in libpng-1.4.0 */ |
| 2404 | #ifdef PNG_IO_STATE_SUPPORTED |
| 2405 | PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_const_structrp png_ptr)); |
| 2406 | |
| 2407 | /* Removed from libpng 1.6; use png_get_io_chunk_type. */ |
| 2408 | PNG_REMOVED(200, png_const_bytep, png_get_io_chunk_name, (png_structrp png_ptr), |
| 2409 | PNG_DEPRECATED) |
| 2410 | |
| 2411 | PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, |
| 2412 | (png_const_structrp png_ptr)); |
| 2413 | |
| 2414 | /* The flags returned by png_get_io_state() are the following: */ |
| 2415 | # define PNG_IO_NONE 0x0000 /* no I/O at this moment */ |
| 2416 | # define PNG_IO_READING 0x0001 /* currently reading */ |
| 2417 | # define PNG_IO_WRITING 0x0002 /* currently writing */ |
| 2418 | # define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */ |
| 2419 | # define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */ |
| 2420 | # define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */ |
| 2421 | # define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */ |
| 2422 | # define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */ |
| 2423 | # define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2424 | #endif /* IO_STATE */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2425 | |
| 2426 | /* Interlace support. The following macros are always defined so that if |
| 2427 | * libpng interlace handling is turned off the macros may be used to handle |
| 2428 | * interlaced images within the application. |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 2429 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2430 | #define PNG_INTERLACE_ADAM7_PASSES 7 |
| 2431 | |
| 2432 | /* Two macros to return the first row and first column of the original, |
| 2433 | * full, image which appears in a given pass. 'pass' is in the range 0 |
| 2434 | * to 6 and the result is in the range 0 to 7. |
| 2435 | */ |
| 2436 | #define PNG_PASS_START_ROW(pass) (((1&~(pass))<<(3-((pass)>>1)))&7) |
| 2437 | #define PNG_PASS_START_COL(pass) (((1& (pass))<<(3-(((pass)+1)>>1)))&7) |
| 2438 | |
| 2439 | /* A macro to return the offset between pixels in the output row for a pair of |
| 2440 | * pixels in the input - effectively the inverse of the 'COL_SHIFT' macro that |
| 2441 | * follows. Note that ROW_OFFSET is the offset from one row to the next whereas |
| 2442 | * COL_OFFSET is from one column to the next, within a row. |
| 2443 | */ |
| 2444 | #define PNG_PASS_ROW_OFFSET(pass) ((pass)>2?(8>>(((pass)-1)>>1)):8) |
| 2445 | #define PNG_PASS_COL_OFFSET(pass) (1<<((7-(pass))>>1)) |
| 2446 | |
| 2447 | /* Two macros to help evaluate the number of rows or columns in each |
| 2448 | * pass. This is expressed as a shift - effectively log2 of the number or |
| 2449 | * rows or columns in each 8x8 tile of the original image. |
| 2450 | */ |
| 2451 | #define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) |
| 2452 | #define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) |
| 2453 | |
| 2454 | /* Hence two macros to determine the number of rows or columns in a given |
| 2455 | * pass of an image given its height or width. In fact these macros may |
| 2456 | * return non-zero even though the sub-image is empty, because the other |
| 2457 | * dimension may be empty for a small image. |
| 2458 | */ |
| 2459 | #define PNG_PASS_ROWS(height, pass) (((height)+(((1<<PNG_PASS_ROW_SHIFT(pass))\ |
| 2460 | -1)-PNG_PASS_START_ROW(pass)))>>PNG_PASS_ROW_SHIFT(pass)) |
| 2461 | #define PNG_PASS_COLS(width, pass) (((width)+(((1<<PNG_PASS_COL_SHIFT(pass))\ |
| 2462 | -1)-PNG_PASS_START_COL(pass)))>>PNG_PASS_COL_SHIFT(pass)) |
| 2463 | |
| 2464 | /* For the reader row callbacks (both progressive and sequential) it is |
| 2465 | * necessary to find the row in the output image given a row in an interlaced |
| 2466 | * image, so two more macros: |
| 2467 | */ |
| 2468 | #define PNG_ROW_FROM_PASS_ROW(y_in, pass) \ |
| 2469 | (((y_in)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass)) |
| 2470 | #define PNG_COL_FROM_PASS_COL(x_in, pass) \ |
| 2471 | (((x_in)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass)) |
| 2472 | |
| 2473 | /* Two macros which return a boolean (0 or 1) saying whether the given row |
| 2474 | * or column is in a particular pass. These use a common utility macro that |
| 2475 | * returns a mask for a given pass - the offset 'off' selects the row or |
| 2476 | * column version. The mask has the appropriate bit set for each column in |
| 2477 | * the tile. |
| 2478 | */ |
| 2479 | #define PNG_PASS_MASK(pass,off) ( \ |
| 2480 | ((0x110145AF>>(((7-(off))-(pass))<<2)) & 0xF) | \ |
| 2481 | ((0x01145AF0>>(((7-(off))-(pass))<<2)) & 0xF0)) |
| 2482 | |
| 2483 | #define PNG_ROW_IN_INTERLACE_PASS(y, pass) \ |
| 2484 | ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) |
| 2485 | #define PNG_COL_IN_INTERLACE_PASS(x, pass) \ |
| 2486 | ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2487 | |
| 2488 | #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED |
| 2489 | /* With these routines we avoid an integer divide, which will be slower on |
| 2490 | * most machines. However, it does take more operations than the corresponding |
| 2491 | * divide method, so it may be slower on a few RISC systems. There are two |
| 2492 | * shifts (by 8 or 16 bits) and an addition, versus a single integer divide. |
| 2493 | * |
| 2494 | * Note that the rounding factors are NOT supposed to be the same! 128 and |
| 2495 | * 32768 are correct for the NODIV code; 127 and 32767 are correct for the |
| 2496 | * standard method. |
| 2497 | * |
| 2498 | * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ] |
| 2499 | */ |
| 2500 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2501 | /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2502 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2503 | # define png_composite(composite, fg, alpha, bg) \ |
| 2504 | { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \ |
| 2505 | * (png_uint_16)(alpha) \ |
| 2506 | + (png_uint_16)(bg)*(png_uint_16)(255 \ |
| 2507 | - (png_uint_16)(alpha)) + 128); \ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2508 | (composite) = (png_byte)(((temp + (temp >> 8)) >> 8) & 0xff); } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2509 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2510 | # define png_composite_16(composite, fg, alpha, bg) \ |
| 2511 | { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \ |
| 2512 | * (png_uint_32)(alpha) \ |
| 2513 | + (png_uint_32)(bg)*(65535 \ |
| 2514 | - (png_uint_32)(alpha)) + 32768); \ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2515 | (composite) = (png_uint_16)(0xffff & ((temp + (temp >> 16)) >> 16)); } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2516 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 2517 | #else /* Standard method using integer division */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2518 | |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2519 | # define png_composite(composite, fg, alpha, bg) \ |
| 2520 | (composite) = \ |
| 2521 | (png_byte)(0xff & (((png_uint_16)(fg) * (png_uint_16)(alpha) + \ |
| 2522 | (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ |
| 2523 | 127) / 255)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2524 | |
| 2525 | # define png_composite_16(composite, fg, alpha, bg) \ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2526 | (composite) = \ |
| 2527 | (png_uint_16)(0xffff & (((png_uint_32)(fg) * (png_uint_32)(alpha) + \ |
| 2528 | (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \ |
| 2529 | 32767) / 65535)) |
| 2530 | #endif /* READ_COMPOSITE_NODIV */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2531 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2532 | #ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED |
| 2533 | PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf)); |
| 2534 | PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf)); |
| 2535 | PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf)); |
| 2536 | #endif |
| 2537 | |
| 2538 | PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_const_structrp png_ptr, |
| 2539 | png_const_bytep buf)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2540 | /* No png_get_int_16 -- may be added if there's a real need for it. */ |
| 2541 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2542 | /* Place a 32-bit number into a buffer in PNG byte order (big-endian). */ |
| 2543 | #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED |
| 2544 | PNG_EXPORT(205, void, png_save_uint_32, (png_bytep buf, png_uint_32 i)); |
| 2545 | #endif |
| 2546 | #ifdef PNG_SAVE_INT_32_SUPPORTED |
| 2547 | PNG_EXPORT(206, void, png_save_int_32, (png_bytep buf, png_int_32 i)); |
| 2548 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2549 | |
| 2550 | /* Place a 16-bit number into a buffer in PNG byte order. |
| 2551 | * The parameter is declared unsigned int, not png_uint_16, |
| 2552 | * just to avoid potential problems on pre-ANSI C compilers. |
| 2553 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2554 | #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED |
| 2555 | PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2556 | /* No png_save_int_16 -- may be added if there's a real need for it. */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2557 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2558 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2559 | #ifdef PNG_USE_READ_MACROS |
| 2560 | /* Inline macros to do direct reads of bytes from the input buffer. |
| 2561 | * The png_get_int_32() routine assumes we are using two's complement |
| 2562 | * format for negative values, which is almost certainly true. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2563 | */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2564 | # define PNG_get_uint_32(buf) \ |
| 2565 | (((png_uint_32)(*(buf)) << 24) + \ |
| 2566 | ((png_uint_32)(*((buf) + 1)) << 16) + \ |
| 2567 | ((png_uint_32)(*((buf) + 2)) << 8) + \ |
| 2568 | ((png_uint_32)(*((buf) + 3)))) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2569 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2570 | /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the |
| 2571 | * function) incorrectly returned a value of type png_uint_32. |
| 2572 | */ |
| 2573 | # define PNG_get_uint_16(buf) \ |
| 2574 | ((png_uint_16) \ |
| 2575 | (((unsigned int)(*(buf)) << 8) + \ |
| 2576 | ((unsigned int)(*((buf) + 1))))) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2577 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2578 | # define PNG_get_int_32(buf) \ |
| 2579 | ((png_int_32)((*(buf) & 0x80) \ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2580 | ? -((png_int_32)(((png_get_uint_32(buf)^0xffffffffU)+1U)&0x7fffffffU)) \ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2581 | : (png_int_32)png_get_uint_32(buf))) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2582 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2583 | /* If PNG_PREFIX is defined the same thing as below happens in pnglibconf.h, |
| 2584 | * but defining a macro name prefixed with PNG_PREFIX. |
| 2585 | */ |
| 2586 | # ifndef PNG_PREFIX |
| 2587 | # define png_get_uint_32(buf) PNG_get_uint_32(buf) |
| 2588 | # define png_get_uint_16(buf) PNG_get_uint_16(buf) |
| 2589 | # define png_get_int_32(buf) PNG_get_int_32(buf) |
| 2590 | # endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2591 | #else |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2592 | # ifdef PNG_PREFIX |
| 2593 | /* No macros; revert to the (redefined) function */ |
| 2594 | # define PNG_get_uint_32 (png_get_uint_32) |
| 2595 | # define PNG_get_uint_16 (png_get_uint_16) |
| 2596 | # define PNG_get_int_32 (png_get_int_32) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2597 | # endif |
| 2598 | #endif |
| 2599 | |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2600 | #ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED |
| 2601 | PNG_EXPORT(242, void, png_set_check_for_invalid_index, |
| 2602 | (png_structrp png_ptr, int allowed)); |
| 2603 | # ifdef PNG_GET_PALETTE_MAX_SUPPORTED |
| 2604 | PNG_EXPORT(243, int, png_get_palette_max, (png_const_structp png_ptr, |
| 2605 | png_const_infop info_ptr)); |
| 2606 | # endif |
| 2607 | #endif /* CHECK_FOR_INVALID_INDEX */ |
| 2608 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2609 | /******************************************************************************* |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2610 | * Section 5: SIMPLIFIED API |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2611 | ******************************************************************************* |
| 2612 | * |
| 2613 | * Please read the documentation in libpng-manual.txt (TODO: write said |
| 2614 | * documentation) if you don't understand what follows. |
| 2615 | * |
| 2616 | * The simplified API hides the details of both libpng and the PNG file format |
| 2617 | * itself. It allows PNG files to be read into a very limited number of |
| 2618 | * in-memory bitmap formats or to be written from the same formats. If these |
| 2619 | * formats do not accomodate your needs then you can, and should, use the more |
| 2620 | * sophisticated APIs above - these support a wide variety of in-memory formats |
| 2621 | * and a wide variety of sophisticated transformations to those formats as well |
| 2622 | * as a wide variety of APIs to manipulate ancillary information. |
| 2623 | * |
| 2624 | * To read a PNG file using the simplified API: |
| 2625 | * |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2626 | * 1) Declare a 'png_image' structure (see below) on the stack, set the |
| 2627 | * version field to PNG_IMAGE_VERSION and the 'opaque' pointer to NULL |
| 2628 | * (this is REQUIRED, your program may crash if you don't do it.) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2629 | * 2) Call the appropriate png_image_begin_read... function. |
| 2630 | * 3) Set the png_image 'format' member to the required sample format. |
| 2631 | * 4) Allocate a buffer for the image and, if required, the color-map. |
| 2632 | * 5) Call png_image_finish_read to read the image and, if required, the |
| 2633 | * color-map into your buffers. |
| 2634 | * |
| 2635 | * There are no restrictions on the format of the PNG input itself; all valid |
| 2636 | * color types, bit depths, and interlace methods are acceptable, and the |
| 2637 | * input image is transformed as necessary to the requested in-memory format |
| 2638 | * during the png_image_finish_read() step. The only caveat is that if you |
| 2639 | * request a color-mapped image from a PNG that is full-color or makes |
| 2640 | * complex use of an alpha channel the transformation is extremely lossy and the |
| 2641 | * result may look terrible. |
| 2642 | * |
| 2643 | * To write a PNG file using the simplified API: |
| 2644 | * |
| 2645 | * 1) Declare a 'png_image' structure on the stack and memset() it to all zero. |
| 2646 | * 2) Initialize the members of the structure that describe the image, setting |
| 2647 | * the 'format' member to the format of the image samples. |
| 2648 | * 3) Call the appropriate png_image_write... function with a pointer to the |
| 2649 | * image and, if necessary, the color-map to write the PNG data. |
| 2650 | * |
| 2651 | * png_image is a structure that describes the in-memory format of an image |
| 2652 | * when it is being read or defines the in-memory format of an image that you |
| 2653 | * need to write: |
| 2654 | */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2655 | #if defined(PNG_SIMPLIFIED_READ_SUPPORTED) || \ |
| 2656 | defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) |
| 2657 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2658 | #define PNG_IMAGE_VERSION 1 |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2659 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2660 | typedef struct png_control *png_controlp; |
| 2661 | typedef struct |
| 2662 | { |
| 2663 | png_controlp opaque; /* Initialize to NULL, free with png_image_free */ |
| 2664 | png_uint_32 version; /* Set to PNG_IMAGE_VERSION */ |
| 2665 | png_uint_32 width; /* Image width in pixels (columns) */ |
| 2666 | png_uint_32 height; /* Image height in pixels (rows) */ |
| 2667 | png_uint_32 format; /* Image format as defined below */ |
| 2668 | png_uint_32 flags; /* A bit mask containing informational flags */ |
| 2669 | png_uint_32 colormap_entries; |
| 2670 | /* Number of entries in the color-map */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2671 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2672 | /* In the event of an error or warning the following field will be set to a |
| 2673 | * non-zero value and the 'message' field will contain a '\0' terminated |
| 2674 | * string with the libpng error or warning message. If both warnings and |
| 2675 | * an error were encountered, only the error is recorded. If there |
| 2676 | * are multiple warnings, only the first one is recorded. |
| 2677 | * |
| 2678 | * The upper 30 bits of this value are reserved, the low two bits contain |
| 2679 | * a value as follows: |
| 2680 | */ |
| 2681 | # define PNG_IMAGE_WARNING 1 |
| 2682 | # define PNG_IMAGE_ERROR 2 |
| 2683 | /* |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2684 | * The result is a two-bit code such that a value more than 1 indicates |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2685 | * a failure in the API just called: |
| 2686 | * |
| 2687 | * 0 - no warning or error |
| 2688 | * 1 - warning |
| 2689 | * 2 - error |
| 2690 | * 3 - error preceded by warning |
| 2691 | */ |
| 2692 | # define PNG_IMAGE_FAILED(png_cntrl) ((((png_cntrl).warning_or_error)&0x03)>1) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2693 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2694 | png_uint_32 warning_or_error; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2695 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2696 | char message[64]; |
| 2697 | } png_image, *png_imagep; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2698 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2699 | /* The samples of the image have one to four channels whose components have |
| 2700 | * original values in the range 0 to 1.0: |
| 2701 | * |
| 2702 | * 1: A single gray or luminance channel (G). |
| 2703 | * 2: A gray/luminance channel and an alpha channel (GA). |
| 2704 | * 3: Three red, green, blue color channels (RGB). |
| 2705 | * 4: Three color channels and an alpha channel (RGBA). |
| 2706 | * |
| 2707 | * The components are encoded in one of two ways: |
| 2708 | * |
| 2709 | * a) As a small integer, value 0..255, contained in a single byte. For the |
| 2710 | * alpha channel the original value is simply value/255. For the color or |
| 2711 | * luminance channels the value is encoded according to the sRGB specification |
| 2712 | * and matches the 8-bit format expected by typical display devices. |
| 2713 | * |
| 2714 | * The color/gray channels are not scaled (pre-multiplied) by the alpha |
| 2715 | * channel and are suitable for passing to color management software. |
| 2716 | * |
| 2717 | * b) As a value in the range 0..65535, contained in a 2-byte integer. All |
| 2718 | * channels can be converted to the original value by dividing by 65535; all |
| 2719 | * channels are linear. Color channels use the RGB encoding (RGB end-points) of |
| 2720 | * the sRGB specification. This encoding is identified by the |
| 2721 | * PNG_FORMAT_FLAG_LINEAR flag below. |
| 2722 | * |
| 2723 | * When the simplified API needs to convert between sRGB and linear colorspaces, |
| 2724 | * the actual sRGB transfer curve defined in the sRGB specification (see the |
| 2725 | * article at http://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2 |
| 2726 | * approximation used elsewhere in libpng. |
| 2727 | * |
| 2728 | * When an alpha channel is present it is expected to denote pixel coverage |
| 2729 | * of the color or luminance channels and is returned as an associated alpha |
| 2730 | * channel: the color/gray channels are scaled (pre-multiplied) by the alpha |
| 2731 | * value. |
| 2732 | * |
| 2733 | * The samples are either contained directly in the image data, between 1 and 8 |
| 2734 | * bytes per pixel according to the encoding, or are held in a color-map indexed |
| 2735 | * by bytes in the image data. In the case of a color-map the color-map entries |
| 2736 | * are individual samples, encoded as above, and the image data has one byte per |
| 2737 | * pixel to select the relevant sample from the color-map. |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2738 | */ |
| 2739 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2740 | /* PNG_FORMAT_* |
| 2741 | * |
| 2742 | * #defines to be used in png_image::format. Each #define identifies a |
| 2743 | * particular layout of sample data and, if present, alpha values. There are |
| 2744 | * separate defines for each of the two component encodings. |
| 2745 | * |
| 2746 | * A format is built up using single bit flag values. All combinations are |
| 2747 | * valid. Formats can be built up from the flag values or you can use one of |
| 2748 | * the predefined values below. When testing formats always use the FORMAT_FLAG |
| 2749 | * macros to test for individual features - future versions of the library may |
| 2750 | * add new flags. |
| 2751 | * |
| 2752 | * When reading or writing color-mapped images the format should be set to the |
| 2753 | * format of the entries in the color-map then png_image_{read,write}_colormap |
| 2754 | * called to read or write the color-map and set the format correctly for the |
| 2755 | * image data. Do not set the PNG_FORMAT_FLAG_COLORMAP bit directly! |
| 2756 | * |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2757 | * NOTE: libpng can be built with particular features disabled. If you see |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2758 | * compiler errors because the definition of one of the following flags has been |
| 2759 | * compiled out it is because libpng does not have the required support. It is |
| 2760 | * possible, however, for the libpng configuration to enable the format on just |
| 2761 | * read or just write; in that case you may see an error at run time. You can |
| 2762 | * guard against this by checking for the definition of the appropriate |
| 2763 | * "_SUPPORTED" macro, one of: |
| 2764 | * |
| 2765 | * PNG_SIMPLIFIED_{READ,WRITE}_{BGR,AFIRST}_SUPPORTED |
| 2766 | */ |
| 2767 | #define PNG_FORMAT_FLAG_ALPHA 0x01U /* format with an alpha channel */ |
| 2768 | #define PNG_FORMAT_FLAG_COLOR 0x02U /* color format: otherwise grayscale */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2769 | #define PNG_FORMAT_FLAG_LINEAR 0x04U /* 2-byte channels else 1-byte */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2770 | #define PNG_FORMAT_FLAG_COLORMAP 0x08U /* image data is color-mapped */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2771 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2772 | #ifdef PNG_FORMAT_BGR_SUPPORTED |
| 2773 | # define PNG_FORMAT_FLAG_BGR 0x10U /* BGR colors, else order is RGB */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2774 | #endif |
| 2775 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2776 | #ifdef PNG_FORMAT_AFIRST_SUPPORTED |
| 2777 | # define PNG_FORMAT_FLAG_AFIRST 0x20U /* alpha channel comes first */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 2778 | #endif |
| 2779 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2780 | /* Commonly used formats have predefined macros. |
| 2781 | * |
| 2782 | * First the single byte (sRGB) formats: |
| 2783 | */ |
| 2784 | #define PNG_FORMAT_GRAY 0 |
| 2785 | #define PNG_FORMAT_GA PNG_FORMAT_FLAG_ALPHA |
| 2786 | #define PNG_FORMAT_AG (PNG_FORMAT_GA|PNG_FORMAT_FLAG_AFIRST) |
| 2787 | #define PNG_FORMAT_RGB PNG_FORMAT_FLAG_COLOR |
| 2788 | #define PNG_FORMAT_BGR (PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_BGR) |
| 2789 | #define PNG_FORMAT_RGBA (PNG_FORMAT_RGB|PNG_FORMAT_FLAG_ALPHA) |
| 2790 | #define PNG_FORMAT_ARGB (PNG_FORMAT_RGBA|PNG_FORMAT_FLAG_AFIRST) |
| 2791 | #define PNG_FORMAT_BGRA (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_ALPHA) |
| 2792 | #define PNG_FORMAT_ABGR (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_AFIRST) |
| 2793 | |
| 2794 | /* Then the linear 2-byte formats. When naming these "Y" is used to |
| 2795 | * indicate a luminance (gray) channel. |
| 2796 | */ |
| 2797 | #define PNG_FORMAT_LINEAR_Y PNG_FORMAT_FLAG_LINEAR |
| 2798 | #define PNG_FORMAT_LINEAR_Y_ALPHA (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_ALPHA) |
| 2799 | #define PNG_FORMAT_LINEAR_RGB (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR) |
| 2800 | #define PNG_FORMAT_LINEAR_RGB_ALPHA \ |
| 2801 | (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA) |
| 2802 | |
| 2803 | /* With color-mapped formats the image data is one byte for each pixel, the byte |
| 2804 | * is an index into the color-map which is formatted as above. To obtain a |
| 2805 | * color-mapped format it is sufficient just to add the PNG_FOMAT_FLAG_COLORMAP |
| 2806 | * to one of the above definitions, or you can use one of the definitions below. |
| 2807 | */ |
| 2808 | #define PNG_FORMAT_RGB_COLORMAP (PNG_FORMAT_RGB|PNG_FORMAT_FLAG_COLORMAP) |
| 2809 | #define PNG_FORMAT_BGR_COLORMAP (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_COLORMAP) |
| 2810 | #define PNG_FORMAT_RGBA_COLORMAP (PNG_FORMAT_RGBA|PNG_FORMAT_FLAG_COLORMAP) |
| 2811 | #define PNG_FORMAT_ARGB_COLORMAP (PNG_FORMAT_ARGB|PNG_FORMAT_FLAG_COLORMAP) |
| 2812 | #define PNG_FORMAT_BGRA_COLORMAP (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_COLORMAP) |
| 2813 | #define PNG_FORMAT_ABGR_COLORMAP (PNG_FORMAT_ABGR|PNG_FORMAT_FLAG_COLORMAP) |
| 2814 | |
| 2815 | /* PNG_IMAGE macros |
| 2816 | * |
| 2817 | * These are convenience macros to derive information from a png_image |
| 2818 | * structure. The PNG_IMAGE_SAMPLE_ macros return values appropriate to the |
| 2819 | * actual image sample values - either the entries in the color-map or the |
| 2820 | * pixels in the image. The PNG_IMAGE_PIXEL_ macros return corresponding values |
| 2821 | * for the pixels and will always return 1 for color-mapped formats. The |
| 2822 | * remaining macros return information about the rows in the image and the |
| 2823 | * complete image. |
| 2824 | * |
| 2825 | * NOTE: All the macros that take a png_image::format parameter are compile time |
| 2826 | * constants if the format parameter is, itself, a constant. Therefore these |
| 2827 | * macros can be used in array declarations and case labels where required. |
| 2828 | * Similarly the macros are also pre-processor constants (sizeof is not used) so |
| 2829 | * they can be used in #if tests. |
| 2830 | * |
| 2831 | * First the information about the samples. |
| 2832 | */ |
| 2833 | #define PNG_IMAGE_SAMPLE_CHANNELS(fmt)\ |
| 2834 | (((fmt)&(PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA))+1) |
| 2835 | /* Return the total number of channels in a given format: 1..4 */ |
| 2836 | |
| 2837 | #define PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt)\ |
| 2838 | ((((fmt) & PNG_FORMAT_FLAG_LINEAR) >> 2)+1) |
| 2839 | /* Return the size in bytes of a single component of a pixel or color-map |
| 2840 | * entry (as appropriate) in the image: 1 or 2. |
| 2841 | */ |
| 2842 | |
| 2843 | #define PNG_IMAGE_SAMPLE_SIZE(fmt)\ |
| 2844 | (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt)) |
| 2845 | /* This is the size of the sample data for one sample. If the image is |
| 2846 | * color-mapped it is the size of one color-map entry (and image pixels are |
| 2847 | * one byte in size), otherwise it is the size of one image pixel. |
| 2848 | */ |
| 2849 | |
| 2850 | #define PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(fmt)\ |
| 2851 | (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * 256) |
| 2852 | /* The maximum size of the color-map required by the format expressed in a |
| 2853 | * count of components. This can be used to compile-time allocate a |
| 2854 | * color-map: |
| 2855 | * |
| 2856 | * png_uint_16 colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(linear_fmt)]; |
| 2857 | * |
| 2858 | * png_byte colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(sRGB_fmt)]; |
| 2859 | * |
| 2860 | * Alternatively use the PNG_IMAGE_COLORMAP_SIZE macro below to use the |
| 2861 | * information from one of the png_image_begin_read_ APIs and dynamically |
| 2862 | * allocate the required memory. |
| 2863 | */ |
| 2864 | |
| 2865 | /* Corresponding information about the pixels */ |
| 2866 | #define PNG_IMAGE_PIXEL_(test,fmt)\ |
| 2867 | (((fmt)&PNG_FORMAT_FLAG_COLORMAP)?1:test(fmt)) |
| 2868 | |
| 2869 | #define PNG_IMAGE_PIXEL_CHANNELS(fmt)\ |
| 2870 | PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_CHANNELS,fmt) |
| 2871 | /* The number of separate channels (components) in a pixel; 1 for a |
| 2872 | * color-mapped image. |
| 2873 | */ |
| 2874 | |
| 2875 | #define PNG_IMAGE_PIXEL_COMPONENT_SIZE(fmt)\ |
| 2876 | PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_COMPONENT_SIZE,fmt) |
| 2877 | /* The size, in bytes, of each component in a pixel; 1 for a color-mapped |
| 2878 | * image. |
| 2879 | */ |
| 2880 | |
| 2881 | #define PNG_IMAGE_PIXEL_SIZE(fmt) PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_SIZE,fmt) |
| 2882 | /* The size, in bytes, of a complete pixel; 1 for a color-mapped image. */ |
| 2883 | |
| 2884 | /* Information about the whole row, or whole image */ |
| 2885 | #define PNG_IMAGE_ROW_STRIDE(image)\ |
| 2886 | (PNG_IMAGE_PIXEL_CHANNELS((image).format) * (image).width) |
| 2887 | /* Return the total number of components in a single row of the image; this |
| 2888 | * is the minimum 'row stride', the minimum count of components between each |
| 2889 | * row. For a color-mapped image this is the minimum number of bytes in a |
| 2890 | * row. |
| 2891 | */ |
| 2892 | |
| 2893 | #define PNG_IMAGE_BUFFER_SIZE(image, row_stride)\ |
| 2894 | (PNG_IMAGE_PIXEL_COMPONENT_SIZE((image).format)*(image).height*(row_stride)) |
| 2895 | /* Return the size, in bytes, of an image buffer given a png_image and a row |
| 2896 | * stride - the number of components to leave space for in each row. |
| 2897 | */ |
| 2898 | |
| 2899 | #define PNG_IMAGE_SIZE(image)\ |
| 2900 | PNG_IMAGE_BUFFER_SIZE(image, PNG_IMAGE_ROW_STRIDE(image)) |
| 2901 | /* Return the size, in bytes, of the image in memory given just a png_image; |
| 2902 | * the row stride is the minimum stride required for the image. |
| 2903 | */ |
| 2904 | |
| 2905 | #define PNG_IMAGE_COLORMAP_SIZE(image)\ |
| 2906 | (PNG_IMAGE_SAMPLE_SIZE((image).format) * (image).colormap_entries) |
| 2907 | /* Return the size, in bytes, of the color-map of this image. If the image |
| 2908 | * format is not a color-map format this will return a size sufficient for |
| 2909 | * 256 entries in the given format; check PNG_FORMAT_FLAG_COLORMAP if |
| 2910 | * you don't want to allocate a color-map in this case. |
| 2911 | */ |
| 2912 | |
| 2913 | /* PNG_IMAGE_FLAG_* |
| 2914 | * |
| 2915 | * Flags containing additional information about the image are held in the |
| 2916 | * 'flags' field of png_image. |
| 2917 | */ |
| 2918 | #define PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB 0x01 |
| 2919 | /* This indicates the the RGB values of the in-memory bitmap do not |
| 2920 | * correspond to the red, green and blue end-points defined by sRGB. |
| 2921 | */ |
| 2922 | |
| 2923 | #define PNG_IMAGE_FLAG_FAST 0x02 |
| 2924 | /* On write emphasise speed over compression; the resultant PNG file will be |
| 2925 | * larger but will be produced significantly faster, particular for large |
| 2926 | * images. Do not use this option for images which will be distributed, only |
| 2927 | * used it when producing intermediate files that will be read back in |
| 2928 | * repeatedly. For a typical 24-bit image the option will double the read |
| 2929 | * speed at the cost of increasing the image size by 25%, however for many |
| 2930 | * more compressible images the PNG file can be 10 times larger with only a |
| 2931 | * slight speed gain. |
| 2932 | */ |
| 2933 | |
| 2934 | #define PNG_IMAGE_FLAG_16BIT_sRGB 0x04 |
| 2935 | /* On read if the image is a 16-bit per component image and there is no gAMA |
| 2936 | * or sRGB chunk assume that the components are sRGB encoded. Notice that |
| 2937 | * images output by the simplified API always have gamma information; setting |
| 2938 | * this flag only affects the interpretation of 16-bit images from an |
| 2939 | * external source. It is recommended that the application expose this flag |
| 2940 | * to the user; the user can normally easily recognize the difference between |
| 2941 | * linear and sRGB encoding. This flag has no effect on write - the data |
| 2942 | * passed to the write APIs must have the correct encoding (as defined |
| 2943 | * above.) |
| 2944 | * |
| 2945 | * If the flag is not set (the default) input 16-bit per component data is |
| 2946 | * assumed to be linear. |
| 2947 | * |
| 2948 | * NOTE: the flag can only be set after the png_image_begin_read_ call, |
| 2949 | * because that call initializes the 'flags' field. |
| 2950 | */ |
| 2951 | |
| 2952 | #ifdef PNG_SIMPLIFIED_READ_SUPPORTED |
| 2953 | /* READ APIs |
| 2954 | * --------- |
| 2955 | * |
| 2956 | * The png_image passed to the read APIs must have been initialized by setting |
| 2957 | * the png_controlp field 'opaque' to NULL (or, safer, memset the whole thing.) |
| 2958 | */ |
| 2959 | #ifdef PNG_STDIO_SUPPORTED |
| 2960 | PNG_EXPORT(234, int, png_image_begin_read_from_file, (png_imagep image, |
| 2961 | const char *file_name)); |
| 2962 | /* The named file is opened for read and the image header is filled in |
| 2963 | * from the PNG header in the file. |
| 2964 | */ |
| 2965 | |
| 2966 | PNG_EXPORT(235, int, png_image_begin_read_from_stdio, (png_imagep image, |
| 2967 | FILE* file)); |
| 2968 | /* The PNG header is read from the stdio FILE object. */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 2969 | #endif /* STDIO */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 2970 | |
| 2971 | PNG_EXPORT(236, int, png_image_begin_read_from_memory, (png_imagep image, |
| 2972 | png_const_voidp memory, png_size_t size)); |
| 2973 | /* The PNG header is read from the given memory buffer. */ |
| 2974 | |
| 2975 | PNG_EXPORT(237, int, png_image_finish_read, (png_imagep image, |
| 2976 | png_const_colorp background, void *buffer, png_int_32 row_stride, |
| 2977 | void *colormap)); |
| 2978 | /* Finish reading the image into the supplied buffer and clean up the |
| 2979 | * png_image structure. |
| 2980 | * |
| 2981 | * row_stride is the step, in byte or 2-byte units as appropriate, |
| 2982 | * between adjacent rows. A positive stride indicates that the top-most row |
| 2983 | * is first in the buffer - the normal top-down arrangement. A negative |
| 2984 | * stride indicates that the bottom-most row is first in the buffer. |
| 2985 | * |
| 2986 | * background need only be supplied if an alpha channel must be removed from |
| 2987 | * a png_byte format and the removal is to be done by compositing on a solid |
| 2988 | * color; otherwise it may be NULL and any composition will be done directly |
| 2989 | * onto the buffer. The value is an sRGB color to use for the background, |
| 2990 | * for grayscale output the green channel is used. |
| 2991 | * |
| 2992 | * background must be supplied when an alpha channel must be removed from a |
| 2993 | * single byte color-mapped output format, in other words if: |
| 2994 | * |
| 2995 | * 1) The original format from png_image_begin_read_from_* had |
| 2996 | * PNG_FORMAT_FLAG_ALPHA set. |
| 2997 | * 2) The format set by the application does not. |
| 2998 | * 3) The format set by the application has PNG_FORMAT_FLAG_COLORMAP set and |
| 2999 | * PNG_FORMAT_FLAG_LINEAR *not* set. |
| 3000 | * |
| 3001 | * For linear output removing the alpha channel is always done by compositing |
| 3002 | * on black and background is ignored. |
| 3003 | * |
| 3004 | * colormap must be supplied when PNG_FORMAT_FLAG_COLORMAP is set. It must |
| 3005 | * be at least the size (in bytes) returned by PNG_IMAGE_COLORMAP_SIZE. |
| 3006 | * image->colormap_entries will be updated to the actual number of entries |
| 3007 | * written to the colormap; this may be less than the original value. |
| 3008 | */ |
| 3009 | |
| 3010 | PNG_EXPORT(238, void, png_image_free, (png_imagep image)); |
| 3011 | /* Free any data allocated by libpng in image->opaque, setting the pointer to |
| 3012 | * NULL. May be called at any time after the structure is initialized. |
| 3013 | */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 3014 | #endif /* SIMPLIFIED_READ */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 3015 | |
| 3016 | #ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED |
| 3017 | #ifdef PNG_STDIO_SUPPORTED |
| 3018 | /* WRITE APIS |
| 3019 | * ---------- |
| 3020 | * For write you must initialize a png_image structure to describe the image to |
| 3021 | * be written. To do this use memset to set the whole structure to 0 then |
| 3022 | * initialize fields describing your image. |
| 3023 | * |
| 3024 | * version: must be set to PNG_IMAGE_VERSION |
| 3025 | * opaque: must be initialized to NULL |
| 3026 | * width: image width in pixels |
| 3027 | * height: image height in rows |
| 3028 | * format: the format of the data (image and color-map) you wish to write |
| 3029 | * flags: set to 0 unless one of the defined flags applies; set |
| 3030 | * PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB for color format images where the RGB |
| 3031 | * values do not correspond to the colors in sRGB. |
| 3032 | * colormap_entries: set to the number of entries in the color-map (0 to 256) |
| 3033 | */ |
| 3034 | PNG_EXPORT(239, int, png_image_write_to_file, (png_imagep image, |
| 3035 | const char *file, int convert_to_8bit, const void *buffer, |
| 3036 | png_int_32 row_stride, const void *colormap)); |
| 3037 | /* Write the image to the named file. */ |
| 3038 | |
| 3039 | PNG_EXPORT(240, int, png_image_write_to_stdio, (png_imagep image, FILE *file, |
| 3040 | int convert_to_8_bit, const void *buffer, png_int_32 row_stride, |
| 3041 | const void *colormap)); |
| 3042 | /* Write the image to the given (FILE*). */ |
| 3043 | |
| 3044 | /* With both write APIs if image is in one of the linear formats with 16-bit |
| 3045 | * data then setting convert_to_8_bit will cause the output to be an 8-bit PNG |
| 3046 | * gamma encoded according to the sRGB specification, otherwise a 16-bit linear |
| 3047 | * encoded PNG file is written. |
| 3048 | * |
| 3049 | * With color-mapped data formats the colormap parameter point to a color-map |
| 3050 | * with at least image->colormap_entries encoded in the specified format. If |
| 3051 | * the format is linear the written PNG color-map will be converted to sRGB |
| 3052 | * regardless of the convert_to_8_bit flag. |
| 3053 | * |
| 3054 | * With all APIs row_stride is handled as in the read APIs - it is the spacing |
| 3055 | * from one row to the next in component sized units (1 or 2 bytes) and if |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 3056 | * negative indicates a bottom-up row layout in the buffer. If row_stride is zero, |
| 3057 | * libpng will calculate it for you from the image width and number of channels. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 3058 | * |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 3059 | * Note that the write API does not support interlacing, sub-8-bit pixels, indexed |
| 3060 | * PNG (color_type 3) or most ancillary chunks. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 3061 | */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 3062 | #endif /* STDIO */ |
| 3063 | #endif /* SIMPLIFIED_WRITE */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 3064 | /******************************************************************************* |
| 3065 | * END OF SIMPLIFIED API |
| 3066 | ******************************************************************************/ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 3067 | #endif /* SIMPLIFIED_{READ|WRITE} */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 3068 | |
| 3069 | /******************************************************************************* |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 3070 | * Section 6: IMPLEMENTATION OPTIONS |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 3071 | ******************************************************************************* |
| 3072 | * |
| 3073 | * Support for arbitrary implementation-specific optimizations. The API allows |
| 3074 | * particular options to be turned on or off. 'Option' is the number of the |
| 3075 | * option and 'onoff' is 0 (off) or non-0 (on). The value returned is given |
| 3076 | * by the PNG_OPTION_ defines below. |
| 3077 | * |
| 3078 | * HARDWARE: normally hardware capabilites, such as the Intel SSE instructions, |
| 3079 | * are detected at run time, however sometimes it may be impossible |
| 3080 | * to do this in user mode, in which case it is necessary to discover |
| 3081 | * the capabilities in an OS specific way. Such capabilities are |
| 3082 | * listed here when libpng has support for them and must be turned |
| 3083 | * ON by the application if present. |
| 3084 | * |
| 3085 | * SOFTWARE: sometimes software optimizations actually result in performance |
| 3086 | * decrease on some architectures or systems, or with some sets of |
| 3087 | * PNG images. 'Software' options allow such optimizations to be |
| 3088 | * selected at run time. |
| 3089 | */ |
| 3090 | #ifdef PNG_SET_OPTION_SUPPORTED |
| 3091 | #ifdef PNG_ARM_NEON_API_SUPPORTED |
| 3092 | # define PNG_ARM_NEON 0 /* HARDWARE: ARM Neon SIMD instructions supported */ |
| 3093 | #endif |
| 3094 | #define PNG_MAXIMUM_INFLATE_WINDOW 2 /* SOFTWARE: force maximum window */ |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 3095 | #define PNG_SKIP_sRGB_CHECK_PROFILE 4 /* SOFTWARE: Check ICC profile for sRGB */ |
| 3096 | #define PNG_OPTION_NEXT 6 /* Next option - numbers must be even */ |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 3097 | |
| 3098 | /* Return values: NOTE: there are four values and 'off' is *not* zero */ |
| 3099 | #define PNG_OPTION_UNSET 0 /* Unset - defaults to off */ |
| 3100 | #define PNG_OPTION_INVALID 1 /* Option number out of range */ |
| 3101 | #define PNG_OPTION_OFF 2 |
| 3102 | #define PNG_OPTION_ON 3 |
| 3103 | |
| 3104 | PNG_EXPORT(244, int, png_set_option, (png_structrp png_ptr, int option, |
| 3105 | int onoff)); |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 3106 | #endif /* SET_OPTION */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 3107 | |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 3108 | /******************************************************************************* |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 3109 | * END OF HARDWARE AND SOFTWARE OPTIONS |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 3110 | ******************************************************************************/ |
| 3111 | |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 3112 | /* Maintainer: Put new public prototypes here ^, in libpng.3, in project |
| 3113 | * defs, and in scripts/symbols.def. |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 3114 | */ |
| 3115 | |
| 3116 | /* The last ordinal number (this is the *last* one already used; the next |
Matt Sarett | 9b1fe63 | 2015-11-25 10:21:17 -0500 | [diff] [blame^] | 3117 | * one to use is one more than this.) |
Chris Craik | b50c217 | 2013-07-29 15:28:30 -0700 | [diff] [blame] | 3118 | */ |
| 3119 | #ifdef PNG_EXPORT_LAST_ORDINAL |
| 3120 | PNG_EXPORT_LAST_ORDINAL(244); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 3121 | #endif |
| 3122 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 3123 | #ifdef __cplusplus |
| 3124 | } |
| 3125 | #endif |
| 3126 | |
| 3127 | #endif /* PNG_VERSION_INFO_ONLY */ |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame] | 3128 | /* Do not put anything past this line */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 3129 | #endif /* PNG_H */ |