Glenn Randers-Pehrson | e647462 | 2006-03-04 16:50:47 -0600 | [diff] [blame] | 1 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 2 | /* png.h - header file for PNG reference library |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 3 | * |
Glenn Randers-Pehrson | 845b74e | 2010-12-06 20:23:42 -0600 | [diff] [blame] | 4 | * libpng version 1.5.0beta57 - December 7, 2010 |
Glenn Randers-Pehrson | e69b55d | 2010-01-01 10:29:06 -0600 | [diff] [blame] | 5 | * Copyright (c) 1998-2010 Glenn Randers-Pehrson |
Glenn Randers-Pehrson | d436672 | 2000-06-04 14:29:29 -0500 | [diff] [blame] | 6 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
| 7 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
Glenn Randers-Pehrson | c4a2ae6 | 1998-01-16 22:06:18 -0600 | [diff] [blame] | 8 | * |
Glenn Randers-Pehrson | bfbf865 | 2009-06-26 21:46:52 -0500 | [diff] [blame] | 9 | * This code is released under the libpng license (See LICENSE, below) |
Glenn Randers-Pehrson | 3e61d79 | 2009-06-24 09:31:28 -0500 | [diff] [blame] | 10 | * |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 11 | * Authors and maintainers: |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 12 | * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat |
| 13 | * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger |
Glenn Randers-Pehrson | 845b74e | 2010-12-06 20:23:42 -0600 | [diff] [blame] | 14 | * libpng versions 0.97, January 1998, through 1.5.0beta57 - December 7, 2010: Glenn |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 15 | * See also "Contributing Authors", below. |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 16 | * |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 17 | * Note about libpng version numbers: |
| 18 | * |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 19 | * Due to various miscommunications, unforeseen code incompatibilities |
| 20 | * and occasional factors outside the authors' control, version numbering |
| 21 | * on the library has not always been consistent and straightforward. |
| 22 | * The following table summarizes matters since version 0.89c, which was |
| 23 | * the first widely used release: |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 24 | * |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 25 | * source png.h png.h shared-lib |
| 26 | * version string int version |
| 27 | * ------- ------ ----- ---------- |
| 28 | * 0.89c "1.0 beta 3" 0.89 89 1.0.89 |
| 29 | * 0.90 "1.0 beta 4" 0.90 90 0.90 [should have been 2.0.90] |
| 30 | * 0.95 "1.0 beta 5" 0.95 95 0.95 [should have been 2.0.95] |
| 31 | * 0.96 "1.0 beta 6" 0.96 96 0.96 [should have been 2.0.96] |
| 32 | * 0.97b "1.00.97 beta 7" 1.00.97 97 1.0.1 [should have been 2.0.97] |
| 33 | * 0.97c 0.97 97 2.0.97 |
| 34 | * 0.98 0.98 98 2.0.98 |
| 35 | * 0.99 0.99 98 2.0.99 |
| 36 | * 0.99a-m 0.99 99 2.0.99 |
| 37 | * 1.00 1.00 100 2.1.0 [100 should be 10000] |
| 38 | * 1.0.0 (from here on, the 100 2.1.0 [100 should be 10000] |
| 39 | * 1.0.1 png.h string is 10001 2.1.0 |
| 40 | * 1.0.1a-e identical to the 10002 from here on, the shared library |
| 41 | * 1.0.2 source version) 10002 is 2.V where V is the source code |
| 42 | * 1.0.2a-b 10003 version, except as noted. |
| 43 | * 1.0.3 10003 |
| 44 | * 1.0.3a-d 10004 |
| 45 | * 1.0.4 10004 |
| 46 | * 1.0.4a-f 10005 |
| 47 | * 1.0.5 (+ 2 patches) 10005 |
| 48 | * 1.0.5a-d 10006 |
| 49 | * 1.0.5e-r 10100 (not source compatible) |
| 50 | * 1.0.5s-v 10006 (not binary compatible) |
| 51 | * 1.0.6 (+ 3 patches) 10006 (still binary incompatible) |
| 52 | * 1.0.6d-f 10007 (still binary incompatible) |
| 53 | * 1.0.6g 10007 |
| 54 | * 1.0.6h 10007 10.6h (testing xy.z so-numbering) |
| 55 | * 1.0.6i 10007 10.6i |
| 56 | * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0) |
Glenn Randers-Pehrson | be9de0f | 2001-01-22 08:52:16 -0600 | [diff] [blame] | 57 | * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible) |
| 58 | * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible) |
| 59 | * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible) |
| 60 | * 1.0.7 1 10007 (still compatible) |
| 61 | * 1.0.8beta1-4 1 10008 2.1.0.8beta1-4 |
| 62 | * 1.0.8rc1 1 10008 2.1.0.8rc1 |
| 63 | * 1.0.8 1 10008 2.1.0.8 |
| 64 | * 1.0.9beta1-6 1 10009 2.1.0.9beta1-6 |
| 65 | * 1.0.9rc1 1 10009 2.1.0.9rc1 |
| 66 | * 1.0.9beta7-10 1 10009 2.1.0.9beta7-10 |
| 67 | * 1.0.9rc2 1 10009 2.1.0.9rc2 |
Glenn Randers-Pehrson | d4e8109 | 2001-01-31 05:56:52 -0600 | [diff] [blame] | 68 | * 1.0.9 1 10009 2.1.0.9 |
Glenn Randers-Pehrson | 1909560 | 2001-03-14 07:08:39 -0600 | [diff] [blame] | 69 | * 1.0.10beta1 1 10010 2.1.0.10beta1 |
Glenn Randers-Pehrson | e164447 | 2001-03-23 05:06:56 -0600 | [diff] [blame] | 70 | * 1.0.10rc1 1 10010 2.1.0.10rc1 |
Glenn Randers-Pehrson | 13cfbac | 2001-03-30 06:42:28 -0600 | [diff] [blame] | 71 | * 1.0.10 1 10010 2.1.0.10 |
Glenn Randers-Pehrson | e1eff58 | 2001-04-14 20:15:41 -0500 | [diff] [blame] | 72 | * 1.0.11beta1-3 1 10011 2.1.0.11beta1-3 |
Glenn Randers-Pehrson | 82ae383 | 2001-04-20 10:32:10 -0500 | [diff] [blame] | 73 | * 1.0.11rc1 1 10011 2.1.0.11rc1 |
Glenn Randers-Pehrson | 3283539 | 2001-04-27 08:29:32 -0500 | [diff] [blame] | 74 | * 1.0.11 1 10011 2.1.0.11 |
Glenn Randers-Pehrson | b182893 | 2001-06-23 08:03:17 -0500 | [diff] [blame] | 75 | * 1.0.12beta1-2 2 10012 2.1.0.12beta1-2 |
| 76 | * 1.0.12rc1 2 10012 2.1.0.12rc1 |
| 77 | * 1.0.12 2 10012 2.1.0.12 |
| 78 | * 1.1.0a-f - 10100 2.1.1.0a-f (branch abandoned) |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 79 | * 1.2.0beta1-2 2 10200 2.1.2.0beta1-2 |
Glenn Randers-Pehrson | 5a0be34 | 2001-10-18 20:55:13 -0500 | [diff] [blame] | 80 | * 1.2.0beta3-5 3 10200 3.1.2.0beta3-5 |
| 81 | * 1.2.0rc1 3 10200 3.1.2.0rc1 |
| 82 | * 1.2.0 3 10200 3.1.2.0 |
Glenn Randers-Pehrson | 5cded0b | 2001-11-07 07:10:08 -0600 | [diff] [blame] | 83 | * 1.2.1beta1-4 3 10201 3.1.2.1beta1-4 |
Glenn Randers-Pehrson | db3b88d | 2001-12-04 06:30:43 -0600 | [diff] [blame] | 84 | * 1.2.1rc1-2 3 10201 3.1.2.1rc1-2 |
| 85 | * 1.2.1 3 10201 3.1.2.1 |
Glenn Randers-Pehrson | 25228ab | 2002-03-31 07:33:55 -0600 | [diff] [blame] | 86 | * 1.2.2beta1-6 12 10202 12.so.0.1.2.2beta1-6 |
Glenn Randers-Pehrson | fcbd787 | 2002-04-07 16:35:38 -0500 | [diff] [blame] | 87 | * 1.0.13beta1 10 10013 10.so.0.1.0.13beta1 |
| 88 | * 1.0.13rc1 10 10013 10.so.0.1.0.13rc1 |
| 89 | * 1.2.2rc1 12 10202 12.so.0.1.2.2rc1 |
Glenn Randers-Pehrson | 4fb046a | 2002-04-15 09:25:51 -0500 | [diff] [blame] | 90 | * 1.0.13 10 10013 10.so.0.1.0.13 |
| 91 | * 1.2.2 12 10202 12.so.0.1.2.2 |
Glenn Randers-Pehrson | 22f2896 | 2002-05-13 18:17:09 -0500 | [diff] [blame] | 92 | * 1.2.3rc1-6 12 10203 12.so.0.1.2.3rc1-6 |
| 93 | * 1.2.3 12 10203 12.so.0.1.2.3 |
Glenn Randers-Pehrson | d020e9d | 2002-06-28 09:34:00 -0500 | [diff] [blame] | 94 | * 1.2.4beta1-3 13 10204 12.so.0.1.2.4beta1-3 |
Glenn Randers-Pehrson | 2ae022d | 2002-07-01 22:23:46 -0500 | [diff] [blame] | 95 | * 1.0.14rc1 13 10014 10.so.0.1.0.14rc1 |
| 96 | * 1.2.4rc1 13 10204 12.so.0.1.2.4rc1 |
Glenn Randers-Pehrson | 484a8a1 | 2002-07-07 19:15:20 -0500 | [diff] [blame] | 97 | * 1.0.14 10 10014 10.so.0.1.0.14 |
| 98 | * 1.2.4 13 10204 12.so.0.1.2.4 |
Glenn Randers-Pehrson | 51d9250 | 2002-08-23 23:07:42 -0500 | [diff] [blame] | 99 | * 1.2.5beta1-2 13 10205 12.so.0.1.2.5beta1-2 |
Glenn Randers-Pehrson | 5ff38d3 | 2002-09-17 23:38:46 -0500 | [diff] [blame] | 100 | * 1.0.15rc1-3 10 10015 10.so.0.1.0.15rc1-3 |
Glenn Randers-Pehrson | 0cc2f95 | 2002-10-03 06:32:37 -0500 | [diff] [blame] | 101 | * 1.2.5rc1-3 13 10205 12.so.0.1.2.5rc1-3 |
| 102 | * 1.0.15 10 10015 10.so.0.1.0.15 |
| 103 | * 1.2.5 13 10205 12.so.0.1.2.5 |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 104 | * 1.2.6beta1-4 13 10206 12.so.0.1.2.6beta1-4 |
Glenn Randers-Pehrson | 37f116a | 2004-08-15 07:15:39 -0500 | [diff] [blame] | 105 | * 1.0.16 10 10016 10.so.0.1.0.16 |
| 106 | * 1.2.6 13 10206 12.so.0.1.2.6 |
Glenn Randers-Pehrson | 67864af | 2004-08-28 23:30:07 -0500 | [diff] [blame] | 107 | * 1.2.7beta1-2 13 10207 12.so.0.1.2.7beta1-2 |
Glenn Randers-Pehrson | 5b77916 | 2004-09-04 13:25:08 -0500 | [diff] [blame] | 108 | * 1.0.17rc1 10 10017 12.so.0.1.0.17rc1 |
| 109 | * 1.2.7rc1 13 10207 12.so.0.1.2.7rc1 |
Glenn Randers-Pehrson | 250dfe1 | 2004-09-11 21:19:54 -0500 | [diff] [blame] | 110 | * 1.0.17 10 10017 12.so.0.1.0.17 |
| 111 | * 1.2.7 13 10207 12.so.0.1.2.7 |
Glenn Randers-Pehrson | 4093607 | 2004-11-20 11:18:40 -0600 | [diff] [blame] | 112 | * 1.2.8beta1-5 13 10208 12.so.0.1.2.8beta1-5 |
Glenn Randers-Pehrson | 584b96e | 2004-11-29 15:08:00 -0600 | [diff] [blame] | 113 | * 1.0.18rc1-5 10 10018 12.so.0.1.0.18rc1-5 |
| 114 | * 1.2.8rc1-5 13 10208 12.so.0.1.2.8rc1-5 |
Glenn Randers-Pehrson | 917648e | 2004-12-02 18:14:51 -0600 | [diff] [blame] | 115 | * 1.0.18 10 10018 12.so.0.1.0.18 |
| 116 | * 1.2.8 13 10208 12.so.0.1.2.8 |
Glenn Randers-Pehrson | e647462 | 2006-03-04 16:50:47 -0600 | [diff] [blame] | 117 | * 1.2.9beta1-3 13 10209 12.so.0.1.2.9beta1-3 |
Glenn Randers-Pehrson | 4deeb79 | 2006-03-22 16:21:59 -0600 | [diff] [blame] | 118 | * 1.2.9beta4-11 13 10209 12.so.0.9[.0] |
Glenn Randers-Pehrson | 3a51203 | 2006-03-31 05:29:33 -0600 | [diff] [blame] | 119 | * 1.2.9rc1 13 10209 12.so.0.9[.0] |
Glenn Randers-Pehrson | a7d0c94 | 2006-04-14 06:22:52 -0500 | [diff] [blame] | 120 | * 1.2.9 13 10209 12.so.0.9[.0] |
Glenn Randers-Pehrson | d60b8fa | 2006-04-20 21:31:14 -0500 | [diff] [blame] | 121 | * 1.2.10beta1-7 13 10210 12.so.0.10[.0] |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 122 | * 1.2.10rc1-2 13 10210 12.so.0.10[.0] |
Glenn Randers-Pehrson | 86dc981 | 2006-05-10 07:27:44 -0500 | [diff] [blame] | 123 | * 1.2.10 13 10210 12.so.0.10[.0] |
Glenn Randers-Pehrson | 73b064c | 2006-05-15 06:44:21 -0500 | [diff] [blame] | 124 | * 1.4.0beta1-5 14 10400 14.so.0.0[.0] |
Glenn Randers-Pehrson | 7824a70 | 2009-06-13 10:05:05 -0500 | [diff] [blame] | 125 | * 1.2.11beta1-4 13 10211 12.so.0.11[.0] |
Glenn Randers-Pehrson | 3424ee7 | 2006-07-12 13:33:47 -0500 | [diff] [blame] | 126 | * 1.4.0beta7-8 14 10400 14.so.0.0[.0] |
Glenn Randers-Pehrson | 7aa1834 | 2009-06-05 17:24:17 -0500 | [diff] [blame] | 127 | * 1.2.11 13 10211 12.so.0.11[.0] |
| 128 | * 1.2.12 13 10212 12.so.0.12[.0] |
Glenn Randers-Pehrson | 701dbaa | 2006-11-17 09:36:54 -0600 | [diff] [blame] | 129 | * 1.4.0beta9-14 14 10400 14.so.0.0[.0] |
Glenn Randers-Pehrson | 7aa1834 | 2009-06-05 17:24:17 -0500 | [diff] [blame] | 130 | * 1.2.13 13 10213 12.so.0.13[.0] |
Glenn Randers-Pehrson | 97a9b48 | 2008-10-25 20:03:28 -0500 | [diff] [blame] | 131 | * 1.4.0beta15-36 14 10400 14.so.0.0[.0] |
Glenn Randers-Pehrson | fa02810 | 2009-10-10 06:15:21 -0500 | [diff] [blame] | 132 | * 1.4.0beta37-87 14 10400 14.so.14.0[.0] |
Glenn Randers-Pehrson | 733da8c | 2009-10-30 00:00:15 -0500 | [diff] [blame] | 133 | * 1.4.0rc01 14 10400 14.so.14.0[.0] |
Glenn Randers-Pehrson | 62ca98e | 2009-12-20 15:14:57 -0600 | [diff] [blame] | 134 | * 1.4.0beta88-109 14 10400 14.so.14.0[.0] |
Glenn Randers-Pehrson | 67a83db | 2010-01-01 18:26:18 -0600 | [diff] [blame] | 135 | * 1.4.0rc02-08 14 10400 14.so.14.0[.0] |
Glenn Randers-Pehrson | 7520224 | 2009-12-25 14:25:29 -0600 | [diff] [blame] | 136 | * 1.4.0 14 10400 14.so.14.0[.0] |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 137 | * 1.4.1beta01-03 14 10401 14.so.14.1[.0] |
| 138 | * 1.4.1rc01 14 10401 14.so.14.1[.0] |
Glenn Randers-Pehrson | 7a5be53 | 2010-02-14 07:16:19 -0600 | [diff] [blame] | 139 | * 1.4.1beta04-12 14 10401 14.so.14.1[.0] |
Glenn Randers-Pehrson | aaf377c | 2010-03-08 11:20:30 -0600 | [diff] [blame] | 140 | * 1.4.1 14 10401 14.so.14.1[.0] |
Glenn Randers-Pehrson | 5b3d554 | 2010-06-18 21:55:53 -0500 | [diff] [blame] | 141 | * 1.4.2 14 10402 14.so.14.2[.0] |
| 142 | * 1.4.3 14 10403 14.so.14.3[.0] |
Glenn Randers-Pehrson | 2776d5e | 2010-11-21 15:18:02 -0600 | [diff] [blame] | 143 | * 1.4.4 14 10404 14.so.14.4[.0] |
Glenn Randers-Pehrson | 845b74e | 2010-12-06 20:23:42 -0600 | [diff] [blame] | 144 | * 1.5.0beta01-57 15 10500 15.so.15.0[.0] |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 145 | * |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 146 | * Henceforth the source version will match the shared-library major |
| 147 | * and minor numbers; the shared-library major version number will be |
| 148 | * used for changes in backward compatibility, as it is intended. The |
| 149 | * PNG_LIBPNG_VER macro, which is not used within libpng but is available |
| 150 | * for applications, is an unsigned integer of the form xyyzz corresponding |
| 151 | * to the source version x.y.z (leading zeros in y and z). Beta versions |
| 152 | * were given the previous public release number plus a letter, until |
| 153 | * version 1.0.6j; from then on they were given the upcoming public |
| 154 | * release number plus "betaNN" or "rcN". |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 155 | * |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 156 | * Binary incompatibility exists only when applications make direct access |
| 157 | * to the info_ptr or png_ptr members through png.h, and the compiled |
| 158 | * application is loaded with a different version of the library. |
Glenn Randers-Pehrson | 326320e | 2000-04-24 07:43:17 -0500 | [diff] [blame] | 159 | * |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 160 | * DLLNUM will change each time there are forward or backward changes |
| 161 | * in binary compatibility (e.g., when a new feature is added). |
Glenn Randers-Pehrson | be9de0f | 2001-01-22 08:52:16 -0600 | [diff] [blame] | 162 | * |
Glenn Randers-Pehrson | f3abb2c | 2010-10-17 12:51:53 -0500 | [diff] [blame] | 163 | * See libpng-manual.txt or libpng.3 for more information. The PNG |
| 164 | * specification is available as a W3C Recommendation and as an ISO |
| 165 | * Specification, <http://www.w3.org/TR/2003/REC-PNG-20031110/ |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 166 | */ |
| 167 | |
| 168 | /* |
Glenn Randers-Pehrson | 68ea243 | 2000-04-01 21:10:05 -0600 | [diff] [blame] | 169 | * COPYRIGHT NOTICE, DISCLAIMER, and LICENSE: |
| 170 | * |
Glenn Randers-Pehrson | d436672 | 2000-06-04 14:29:29 -0500 | [diff] [blame] | 171 | * If you modify libpng you may insert additional notices immediately following |
| 172 | * this sentence. |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 173 | * |
Glenn Randers-Pehrson | bfbf865 | 2009-06-26 21:46:52 -0500 | [diff] [blame] | 174 | * This code is released under the libpng license. |
| 175 | * |
Glenn Randers-Pehrson | 845b74e | 2010-12-06 20:23:42 -0600 | [diff] [blame] | 176 | * libpng versions 1.2.6, August 15, 2004, through 1.5.0beta57, December 7, 2010, are |
Glenn Randers-Pehrson | e69b55d | 2010-01-01 10:29:06 -0600 | [diff] [blame] | 177 | * Copyright (c) 2004, 2006-2010 Glenn Randers-Pehrson, and are |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 178 | * distributed according to the same disclaimer and license as libpng-1.2.5 |
Glenn Randers-Pehrson | a4981d4 | 2004-08-25 22:00:45 -0500 | [diff] [blame] | 179 | * with the following individual added to the list of Contributing Authors: |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 180 | * |
| 181 | * Cosmin Truta |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 182 | * |
Glenn Randers-Pehrson | a4981d4 | 2004-08-25 22:00:45 -0500 | [diff] [blame] | 183 | * libpng versions 1.0.7, July 1, 2000, through 1.2.5, October 3, 2002, are |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 184 | * Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are |
Glenn Randers-Pehrson | 32fc5ce | 2000-07-24 06:34:14 -0500 | [diff] [blame] | 185 | * distributed according to the same disclaimer and license as libpng-1.0.6 |
Glenn Randers-Pehrson | a4981d4 | 2004-08-25 22:00:45 -0500 | [diff] [blame] | 186 | * with the following individuals added to the list of Contributing Authors: |
Glenn Randers-Pehrson | d436672 | 2000-06-04 14:29:29 -0500 | [diff] [blame] | 187 | * |
| 188 | * Simon-Pierre Cadieux |
| 189 | * Eric S. Raymond |
| 190 | * Gilles Vollant |
| 191 | * |
Glenn Randers-Pehrson | 3d5a520 | 2000-07-01 15:37:28 -0500 | [diff] [blame] | 192 | * and with the following additions to the disclaimer: |
| 193 | * |
| 194 | * There is no warranty against interference with your enjoyment of the |
| 195 | * library or against infringement. There is no warranty that our |
| 196 | * efforts or the library will fulfill any of your particular purposes |
| 197 | * or needs. This library is provided with all faults, and the entire |
| 198 | * risk of satisfactory quality, performance, accuracy, and effort is with |
| 199 | * the user. |
| 200 | * |
| 201 | * libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are |
Glenn Randers-Pehrson | a4981d4 | 2004-08-25 22:00:45 -0500 | [diff] [blame] | 202 | * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson, and are |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 203 | * distributed according to the same disclaimer and license as libpng-0.96, |
Glenn Randers-Pehrson | d436672 | 2000-06-04 14:29:29 -0500 | [diff] [blame] | 204 | * with the following individuals added to the list of Contributing Authors: |
| 205 | * |
| 206 | * Tom Lane |
| 207 | * Glenn Randers-Pehrson |
| 208 | * Willem van Schaik |
| 209 | * |
| 210 | * libpng versions 0.89, June 1996, through 0.96, May 1997, are |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 211 | * Copyright (c) 1996, 1997 Andreas Dilger |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 212 | * Distributed according to the same disclaimer and license as libpng-0.88, |
Glenn Randers-Pehrson | d436672 | 2000-06-04 14:29:29 -0500 | [diff] [blame] | 213 | * with the following individuals added to the list of Contributing Authors: |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 214 | * |
| 215 | * John Bowler |
| 216 | * Kevin Bracey |
| 217 | * Sam Bushell |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 218 | * Magnus Holmgren |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 219 | * Greg Roelofs |
Glenn Randers-Pehrson | d436672 | 2000-06-04 14:29:29 -0500 | [diff] [blame] | 220 | * Tom Tanner |
| 221 | * |
| 222 | * libpng versions 0.5, May 1995, through 0.88, January 1996, are |
| 223 | * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. |
| 224 | * |
| 225 | * For the purposes of this copyright and license, "Contributing Authors" |
| 226 | * is defined as the following set of individuals: |
| 227 | * |
| 228 | * Andreas Dilger |
| 229 | * Dave Martindale |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 230 | * Guy Eric Schalnat |
| 231 | * Paul Schmidt |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 232 | * Tim Wegner |
| 233 | * |
| 234 | * The PNG Reference Library is supplied "AS IS". The Contributing Authors |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 235 | * and Group 42, Inc. disclaim all warranties, expressed or implied, |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 236 | * including, without limitation, the warranties of merchantability and of |
| 237 | * fitness for any purpose. The Contributing Authors and Group 42, Inc. |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 238 | * assume no liability for direct, indirect, incidental, special, exemplary, |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 239 | * or consequential damages, which may result from the use of the PNG |
| 240 | * Reference Library, even if advised of the possibility of such damage. |
| 241 | * |
| 242 | * Permission is hereby granted to use, copy, modify, and distribute this |
| 243 | * source code, or portions hereof, for any purpose, without fee, subject |
| 244 | * to the following restrictions: |
| 245 | * |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 246 | * 1. The origin of this source code must not be misrepresented. |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 247 | * |
Glenn Randers-Pehrson | 53c07f5 | 2010-06-18 18:55:55 -0500 | [diff] [blame] | 248 | * 2. Altered versions must be plainly marked as such and must not |
| 249 | * be misrepresented as being the original source. |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 250 | * |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 251 | * 3. This Copyright notice may not be removed or altered from |
| 252 | * any source or altered source distribution. |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 253 | * |
| 254 | * The Contributing Authors and Group 42, Inc. specifically permit, without |
| 255 | * fee, and encourage the use of this source code as a component to |
| 256 | * supporting the PNG file format in commercial products. If you use this |
| 257 | * source code in a product, acknowledgment is not required but would be |
| 258 | * appreciated. |
| 259 | */ |
| 260 | |
| 261 | /* |
| 262 | * A "png_get_copyright" function is available, for convenient use in "about" |
| 263 | * boxes and the like: |
| 264 | * |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 265 | * printf("%s", png_get_copyright(NULL)); |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 266 | * |
| 267 | * Also, the PNG logo (in PNG format, of course) is supplied in the |
Glenn Randers-Pehrson | a4d54bd | 2000-07-14 08:15:12 -0500 | [diff] [blame] | 268 | * files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31). |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 269 | */ |
| 270 | |
| 271 | /* |
| 272 | * Libpng is OSI Certified Open Source Software. OSI Certified is a |
| 273 | * certification mark of the Open Source Initiative. |
| 274 | */ |
| 275 | |
| 276 | /* |
| 277 | * The contributing authors would like to thank all those who helped |
| 278 | * with testing, bug fixes, and patience. This wouldn't have been |
| 279 | * possible without all of you. |
| 280 | * |
| 281 | * Thanks to Frank J. T. Wojcik for helping with the documentation. |
| 282 | */ |
| 283 | |
| 284 | /* |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 285 | * Y2K compliance in libpng: |
| 286 | * ========================= |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 287 | * |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 288 | * December 7, 2010 |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 289 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 290 | * Since the PNG Development group is an ad-hoc body, we can't make |
| 291 | * an official declaration. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 292 | * |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 293 | * This is your unofficial assurance that libpng from version 0.71 and |
Glenn Randers-Pehrson | 845b74e | 2010-12-06 20:23:42 -0600 | [diff] [blame] | 294 | * upward through 1.5.0beta57 are Y2K compliant. It is my belief that |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 295 | * earlier versions were also Y2K compliant. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 296 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 297 | * Libpng only has three year fields. One is a 2-byte unsigned integer |
| 298 | * that will hold years up to 65535. The other two hold the date in text |
| 299 | * format, and will hold years up to 9999. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 300 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 301 | * The integer is |
| 302 | * "png_uint_16 year" in png_time_struct. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 303 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 304 | * The strings are |
| 305 | * "png_charp time_buffer" in png_struct and |
| 306 | * "near_time_buffer", which is a local character string in png.c. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 307 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 308 | * There are seven time-related functions: |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 309 | * png.c: png_convert_to_rfc_1123() in png.c |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 310 | * (formerly png_convert_to_rfc_1152() in error) |
| 311 | * png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c |
| 312 | * png_convert_from_time_t() in pngwrite.c |
| 313 | * png_get_tIME() in pngget.c |
| 314 | * png_handle_tIME() in pngrutil.c, called in pngread.c |
| 315 | * png_set_tIME() in pngset.c |
| 316 | * png_write_tIME() in pngwutil.c, called in pngwrite.c |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 317 | * |
| 318 | * All handle dates properly in a Y2K environment. The |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 319 | * png_convert_from_time_t() function calls gmtime() to convert from system |
| 320 | * clock time, which returns (year - 1900), which we properly convert to |
| 321 | * the full 4-digit year. There is a possibility that applications using |
| 322 | * libpng are not passing 4-digit years into the png_convert_to_rfc_1123() |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 323 | * function, or that they are incorrectly passing only a 2-digit year |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 324 | * instead of "year - 1900" into the png_convert_from_struct_tm() function, |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 325 | * but this is not under our control. The libpng documentation has always |
| 326 | * stated that it works with 4-digit years, and the APIs have been |
| 327 | * documented as such. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 328 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 329 | * The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned |
| 330 | * integer to hold the year, and can hold years as large as 65535. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 331 | * |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 332 | * zlib, upon which libpng depends, is also Y2K compliant. It contains |
| 333 | * no date-related code. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 334 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 335 | * Glenn Randers-Pehrson |
| 336 | * libpng maintainer |
| 337 | * PNG Development Group |
Glenn Randers-Pehrson | bcfd15d | 1999-10-01 14:22:25 -0500 | [diff] [blame] | 338 | */ |
| 339 | |
Glenn Randers-Pehrson | 1394480 | 2000-06-24 07:42:42 -0500 | [diff] [blame] | 340 | #ifndef PNG_H |
| 341 | #define PNG_H |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 342 | |
Glenn Randers-Pehrson | f3abb2c | 2010-10-17 12:51:53 -0500 | [diff] [blame] | 343 | /* This is not the place to learn how to use libpng. The file libpng-manual.txt |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 344 | * describes how to use libpng, and the file example.c summarizes it |
| 345 | * with some code on which to build. This file is useful for looking |
| 346 | * at the actual function definitions and structure components. |
| 347 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 348 | |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 349 | /* Version information for png.h - this should match the version in png.c */ |
Glenn Randers-Pehrson | 845b74e | 2010-12-06 20:23:42 -0600 | [diff] [blame] | 350 | #define PNG_LIBPNG_VER_STRING "1.5.0beta57" |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 351 | #define PNG_HEADER_VERSION_STRING \ |
Glenn Randers-Pehrson | 845b74e | 2010-12-06 20:23:42 -0600 | [diff] [blame] | 352 | " libpng version 1.5.0beta57 - December 7, 2010\n" |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 353 | |
Glenn Randers-Pehrson | f1eb918 | 2010-02-08 15:36:41 -0600 | [diff] [blame] | 354 | #define PNG_LIBPNG_VER_SONUM 15 |
| 355 | #define PNG_LIBPNG_VER_DLLNUM 15 |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 356 | |
| 357 | /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */ |
| 358 | #define PNG_LIBPNG_VER_MAJOR 1 |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 359 | #define PNG_LIBPNG_VER_MINOR 5 |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 360 | #define PNG_LIBPNG_VER_RELEASE 0 |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 361 | /* This should match the numeric part of the final component of |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 362 | * PNG_LIBPNG_VER_STRING, omitting any leading zero: |
| 363 | */ |
Glenn Randers-Pehrson | d56aca7 | 2000-11-23 11:51:42 -0600 | [diff] [blame] | 364 | |
Glenn Randers-Pehrson | 845b74e | 2010-12-06 20:23:42 -0600 | [diff] [blame] | 365 | #define PNG_LIBPNG_VER_BUILD 57 |
Glenn Randers-Pehrson | d56aca7 | 2000-11-23 11:51:42 -0600 | [diff] [blame] | 366 | |
Glenn Randers-Pehrson | 4093607 | 2004-11-20 11:18:40 -0600 | [diff] [blame] | 367 | /* Release Status */ |
Glenn Randers-Pehrson | d56aca7 | 2000-11-23 11:51:42 -0600 | [diff] [blame] | 368 | #define PNG_LIBPNG_BUILD_ALPHA 1 |
| 369 | #define PNG_LIBPNG_BUILD_BETA 2 |
| 370 | #define PNG_LIBPNG_BUILD_RC 3 |
| 371 | #define PNG_LIBPNG_BUILD_STABLE 4 |
Glenn Randers-Pehrson | 4093607 | 2004-11-20 11:18:40 -0600 | [diff] [blame] | 372 | #define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7 |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 373 | |
Glenn Randers-Pehrson | 4093607 | 2004-11-20 11:18:40 -0600 | [diff] [blame] | 374 | /* Release-Specific Flags */ |
| 375 | #define PNG_LIBPNG_BUILD_PATCH 8 /* Can be OR'ed with |
| 376 | PNG_LIBPNG_BUILD_STABLE only */ |
| 377 | #define PNG_LIBPNG_BUILD_PRIVATE 16 /* Cannot be OR'ed with |
| 378 | PNG_LIBPNG_BUILD_SPECIAL */ |
| 379 | #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with |
| 380 | PNG_LIBPNG_BUILD_PRIVATE */ |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 381 | |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 382 | #define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 383 | |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 384 | /* Careful here. At one time, Guy wanted to use 082, but that would be octal. |
| 385 | * We must not include leading zeros. |
| 386 | * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only |
| 387 | * version 1.0.0 was mis-numbered 100 instead of 10000). From |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 388 | * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release |
| 389 | */ |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 390 | #define PNG_LIBPNG_VER 10500 /* 1.5.0 */ |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 391 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 392 | /* Library configuration: these options cannot be changed after |
| 393 | * the library has been built. |
| 394 | */ |
| 395 | #ifndef PNGLCONF_H |
Glenn Randers-Pehrson | 8c66786 | 2010-08-24 16:16:35 -0500 | [diff] [blame] | 396 | /* If pnglibconf.h is missing, you can |
| 397 | * copy scripts/pnglibconf.h.prebuilt to pnglibconf.h |
| 398 | */ |
Glenn Randers-Pehrson | 98b4f00 | 2010-04-16 22:30:26 -0500 | [diff] [blame] | 399 | # include "pnglibconf.h" |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 400 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 401 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 402 | #ifndef PNG_VERSION_INFO_ONLY |
| 403 | /* Standard header files (not needed for the version info) */ |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 404 | # ifdef PNG_SETJMP_SUPPORTED |
| 405 | # include <setjmp.h> |
| 406 | # endif |
| 407 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 408 | /* Need the time information for converting tIME chunks, it |
| 409 | * defines struct tm: |
| 410 | */ |
| 411 | #ifdef PNG_CONVERT_tIME_SUPPORTED |
| 412 | /* "time.h" functions are not supported on all operating systems */ |
| 413 | # include <time.h> |
| 414 | #endif |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 415 | |
| 416 | /* Machine specific configuration. */ |
| 417 | # include "pngconf.h" |
| 418 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 419 | |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 420 | /* |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 421 | * Added at libpng-1.2.8 |
| 422 | * |
| 423 | * Ref MSDN: Private as priority over Special |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 424 | * VS_FF_PRIVATEBUILD File *was not* built using standard release |
| 425 | * procedures. If this value is given, the StringFileInfo block must |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 426 | * contain a PrivateBuild string. |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 427 | * |
| 428 | * VS_FF_SPECIALBUILD File *was* built by the original company using |
| 429 | * standard release procedures but is a variation of the standard |
| 430 | * file of the same version number. If this value is given, the |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 431 | * StringFileInfo block must contain a SpecialBuild string. |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 432 | */ |
| 433 | |
Glenn Randers-Pehrson | 98b4f00 | 2010-04-16 22:30:26 -0500 | [diff] [blame] | 434 | #ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */ |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 435 | # define PNG_LIBPNG_BUILD_TYPE \ |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 436 | (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE) |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 437 | #else |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 438 | # ifdef PNG_LIBPNG_SPECIALBUILD |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 439 | # define PNG_LIBPNG_BUILD_TYPE \ |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 440 | (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL) |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 441 | # else |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 442 | # define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE) |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 443 | # endif |
| 444 | #endif |
| 445 | |
| 446 | #ifndef PNG_VERSION_INFO_ONLY |
| 447 | |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 448 | /* Inhibit C++ name-mangling for libpng functions but not for system calls. */ |
| 449 | #ifdef __cplusplus |
| 450 | extern "C" { |
| 451 | #endif /* __cplusplus */ |
| 452 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 453 | /* Version information for C files, stored in png.c. This had better match |
| 454 | * the version above. |
| 455 | */ |
Glenn Randers-Pehrson | 4c8f726 | 2010-03-16 19:30:01 -0500 | [diff] [blame] | 456 | #define png_libpng_ver png_get_header_ver(NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 457 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 458 | /* This file is arranged in several sections: |
| 459 | * |
| 460 | * 1. Any configuration options that can be specified by for the application |
Glenn Randers-Pehrson | 98b4f00 | 2010-04-16 22:30:26 -0500 | [diff] [blame] | 461 | * code when it is built. (Build time configuration is in pnglibconf.h) |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 462 | * 2. Type definitions (base types are defined in pngconf.h), structure |
| 463 | * definitions. |
| 464 | * 3. Exported library functions. |
| 465 | * |
| 466 | * The library source code has additional files (principally pngpriv.h) that |
| 467 | * allow configuration of the library. |
| 468 | */ |
| 469 | /* Section 1: run time configuration |
Glenn Randers-Pehrson | 98b4f00 | 2010-04-16 22:30:26 -0500 | [diff] [blame] | 470 | * See pnglibconf.h for build time configuration |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 471 | * |
| 472 | * Run time configuration allows the application to choose between |
| 473 | * implementations of certain arithmetic APIs. The default is set |
Glenn Randers-Pehrson | 98b4f00 | 2010-04-16 22:30:26 -0500 | [diff] [blame] | 474 | * at build time and recorded in pnglibconf.h, but it is safe to |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 475 | * override these (and only these) settings. Note that this won't |
| 476 | * change what the library does, only application code, and the |
| 477 | * settings can (and probably should) be made on a per-file basis |
| 478 | * by setting the #defines before including png.h |
| 479 | * |
| 480 | * Use macros to read integers from PNG data or use the exported |
| 481 | * functions? |
| 482 | * PNG_USE_READ_MACROS: use the macros (see below) Note that |
| 483 | * the macros evaluate their argument multiple times. |
| 484 | * PNG_NO_USE_READ_MACROS: call the relevant library function. |
| 485 | * |
| 486 | * Use the alternative algorithm for compositing alpha samples that |
| 487 | * does not use division? |
| 488 | * PNG_READ_COMPOSITE_NODIV_SUPPORTED: use the 'no division' |
| 489 | * algorithm. |
| 490 | * PNG_NO_READ_COMPOSITE_NODIV: use the 'division' algorithm. |
| 491 | * |
| 492 | * How to handle benign errors if PNG_ALLOW_BENIGN_ERRORS is |
| 493 | * false? |
| 494 | * PNG_ALLOW_BENIGN_ERRORS: map calls to the benign error |
| 495 | * APIs to png_warning. |
| 496 | * Otherwise the calls are mapped to png_error. |
| 497 | */ |
| 498 | |
| 499 | /* Section 2: type definitions, including structures and compile time |
| 500 | * constants. |
| 501 | * See pngconf.h for base types that vary by machine/system |
| 502 | */ |
Glenn Randers-Pehrson | 88910f5 | 2010-10-16 20:38:45 -0500 | [diff] [blame] | 503 | |
| 504 | /* This triggers a compiler error in png.c, if png.c and png.h |
| 505 | * do not agree upon the version number. |
| 506 | */ |
Glenn Randers-Pehrson | 845b74e | 2010-12-06 20:23:42 -0600 | [diff] [blame] | 507 | typedef char* png_libpng_version_1_5_0beta57; |
Glenn Randers-Pehrson | 88910f5 | 2010-10-16 20:38:45 -0500 | [diff] [blame] | 508 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 509 | /* Three color definitions. The order of the red, green, and blue, (and the |
| 510 | * exact size) is not important, although the size of the fields need to |
| 511 | * be png_byte or png_uint_16 (as defined below). |
| 512 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 513 | typedef struct png_color_struct |
| 514 | { |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 515 | png_byte red; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 516 | png_byte green; |
| 517 | png_byte blue; |
| 518 | } png_color; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 519 | typedef png_color FAR * png_colorp; |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 520 | typedef PNG_CONST png_color FAR * png_const_colorp; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 521 | typedef png_color FAR * FAR * png_colorpp; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 522 | |
| 523 | typedef struct png_color_16_struct |
| 524 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 525 | png_byte index; /* used for palette files */ |
| 526 | png_uint_16 red; /* for use in red green blue files */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 527 | png_uint_16 green; |
| 528 | png_uint_16 blue; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 529 | png_uint_16 gray; /* for use in grayscale files */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 530 | } png_color_16; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 531 | typedef png_color_16 FAR * png_color_16p; |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 532 | typedef PNG_CONST png_color_16 FAR * png_const_color_16p; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 533 | typedef png_color_16 FAR * FAR * png_color_16pp; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 534 | |
| 535 | typedef struct png_color_8_struct |
| 536 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 537 | png_byte red; /* for use in red green blue files */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 538 | png_byte green; |
| 539 | png_byte blue; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 540 | png_byte gray; /* for use in grayscale files */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 541 | png_byte alpha; /* for alpha channel files */ |
| 542 | } png_color_8; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 543 | typedef png_color_8 FAR * png_color_8p; |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 544 | typedef PNG_CONST png_color_8 FAR * png_const_color_8p; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 545 | typedef png_color_8 FAR * FAR * png_color_8pp; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 546 | |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 547 | /* |
| 548 | * The following two structures are used for the in-core representation |
| 549 | * of sPLT chunks. |
| 550 | */ |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 551 | typedef struct png_sPLT_entry_struct |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 552 | { |
| 553 | png_uint_16 red; |
| 554 | png_uint_16 green; |
| 555 | png_uint_16 blue; |
| 556 | png_uint_16 alpha; |
| 557 | png_uint_16 frequency; |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 558 | } png_sPLT_entry; |
| 559 | typedef png_sPLT_entry FAR * png_sPLT_entryp; |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 560 | typedef PNG_CONST png_sPLT_entry FAR * png_const_sPLT_entryp; |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 561 | typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 562 | |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 563 | /* When the depth of the sPLT palette is 8 bits, the color and alpha samples |
| 564 | * occupy the LSB of their respective members, and the MSB of each member |
| 565 | * is zero-filled. The frequency member always occupies the full 16 bits. |
| 566 | */ |
| 567 | |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 568 | typedef struct png_sPLT_struct |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 569 | { |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 570 | png_charp name; /* palette name */ |
| 571 | png_byte depth; /* depth of palette samples */ |
| 572 | png_sPLT_entryp entries; /* palette entries */ |
| 573 | png_int_32 nentries; /* number of palette entries */ |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 574 | } png_sPLT_t; |
| 575 | typedef png_sPLT_t FAR * png_sPLT_tp; |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 576 | typedef PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp; |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 577 | typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 578 | |
| 579 | #ifdef PNG_TEXT_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 580 | /* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file, |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 581 | * and whether that contents is compressed or not. The "key" field |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 582 | * points to a regular zero-terminated C string. The "text", "lang", and |
| 583 | * "lang_key" fields can be regular C strings, empty strings, or NULL pointers. |
| 584 | * However, the * structure returned by png_get_text() will always contain |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 585 | * regular zero-terminated C strings (possibly empty), never NULL pointers, |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 586 | * so they can be safely used in printf() and other string-handling functions. |
| 587 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 588 | typedef struct png_text_struct |
| 589 | { |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 590 | int compression; /* compression value: |
| 591 | -1: tEXt, none |
| 592 | 0: zTXt, deflate |
| 593 | 1: iTXt, none |
| 594 | 2: iTXt, deflate */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 595 | png_charp key; /* keyword, 1-79 character description of "text" */ |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 596 | png_charp text; /* comment, may be an empty string (ie "") |
| 597 | or a NULL pointer */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 598 | png_size_t text_length; /* length of the text string */ |
| 599 | png_size_t itxt_length; /* length of the itxt string */ |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 600 | png_charp lang; /* language code, 0-79 characters |
| 601 | or a NULL pointer */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 602 | png_charp lang_key; /* keyword translated UTF-8 string, 0 or more |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 603 | chars or a NULL pointer */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 604 | } png_text; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 605 | typedef png_text FAR * png_textp; |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 606 | typedef PNG_CONST png_text FAR * png_const_textp; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 607 | typedef png_text FAR * FAR * png_textpp; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 608 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 609 | |
| 610 | /* Supported compression types for text in PNG files (tEXt, and zTXt). |
| 611 | * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */ |
| 612 | #define PNG_TEXT_COMPRESSION_NONE_WR -3 |
| 613 | #define PNG_TEXT_COMPRESSION_zTXt_WR -2 |
| 614 | #define PNG_TEXT_COMPRESSION_NONE -1 |
| 615 | #define PNG_TEXT_COMPRESSION_zTXt 0 |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 616 | #define PNG_ITXT_COMPRESSION_NONE 1 |
| 617 | #define PNG_ITXT_COMPRESSION_zTXt 2 |
| 618 | #define PNG_TEXT_COMPRESSION_LAST 3 /* Not a valid value */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 619 | |
| 620 | /* png_time is a way to hold the time in an machine independent way. |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 621 | * Two conversions are provided, both from time_t and struct tm. There |
| 622 | * is no portable way to convert to either of these structures, as far |
| 623 | * as I know. If you know of a portable way, send it to me. As a side |
Glenn Randers-Pehrson | 231e687 | 2001-01-12 15:13:06 -0600 | [diff] [blame] | 624 | * note - PNG has always been Year 2000 compliant! |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 625 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 626 | typedef struct png_time_struct |
| 627 | { |
| 628 | png_uint_16 year; /* full year, as in, 1995 */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 629 | png_byte month; /* month of year, 1 - 12 */ |
| 630 | png_byte day; /* day of month, 1 - 31 */ |
| 631 | png_byte hour; /* hour of day, 0 - 23 */ |
| 632 | png_byte minute; /* minute of hour, 0 - 59 */ |
| 633 | png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 634 | } png_time; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 635 | typedef png_time FAR * png_timep; |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 636 | typedef PNG_CONST png_time FAR * png_const_timep; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 637 | typedef png_time FAR * FAR * png_timepp; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 638 | |
Glenn Randers-Pehrson | 38674ec | 2009-06-16 13:33:01 -0500 | [diff] [blame] | 639 | #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 640 | defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 641 | /* png_unknown_chunk is a structure to hold queued chunks for which there is |
| 642 | * no specific support. The idea is that we can use this to queue |
| 643 | * up private chunks for output even though the library doesn't actually |
| 644 | * know about their semantics. |
| 645 | */ |
| 646 | typedef struct png_unknown_chunk_t |
| 647 | { |
| 648 | png_byte name[5]; |
| 649 | png_byte *data; |
| 650 | png_size_t size; |
| 651 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 652 | /* libpng-using applications should NOT directly modify this byte. */ |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 653 | png_byte location; /* mode of operation at read time */ |
| 654 | } |
| 655 | png_unknown_chunk; |
| 656 | typedef png_unknown_chunk FAR * png_unknown_chunkp; |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 657 | typedef PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 658 | typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp; |
| 659 | #endif |
| 660 | |
Glenn Randers-Pehrson | f0cdbe7 | 2010-02-08 23:18:15 -0600 | [diff] [blame] | 661 | typedef struct png_info_def png_info; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 662 | typedef png_info FAR * png_infop; |
| 663 | typedef png_info FAR * FAR * png_infopp; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 664 | |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 665 | /* Maximum positive integer used in PNG is (2^31)-1 */ |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 666 | #define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL) |
Glenn Randers-Pehrson | 7806777 | 2004-11-02 21:49:39 -0600 | [diff] [blame] | 667 | #define PNG_UINT_32_MAX ((png_uint_32)(-1)) |
| 668 | #define PNG_SIZE_MAX ((png_size_t)(-1)) |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 669 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 670 | /* These are constants for fixed point values encoded in the |
| 671 | * PNG specification manner (x100000) |
| 672 | */ |
| 673 | #define PNG_FP_1 100000 |
| 674 | #define PNG_FP_HALF 50000 |
| 675 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 676 | /* These describe the color_type field in png_info. */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 677 | /* color type masks */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 678 | #define PNG_COLOR_MASK_PALETTE 1 |
| 679 | #define PNG_COLOR_MASK_COLOR 2 |
| 680 | #define PNG_COLOR_MASK_ALPHA 4 |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 681 | |
| 682 | /* color types. Note that not all combinations are legal */ |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 683 | #define PNG_COLOR_TYPE_GRAY 0 |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 684 | #define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE) |
| 685 | #define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR) |
| 686 | #define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 687 | #define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA) |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 688 | /* aliases */ |
| 689 | #define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA |
| 690 | #define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 691 | |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 692 | /* This is for compression type. PNG 1.0-1.2 only define the single type. */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 693 | #define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */ |
| 694 | #define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE |
| 695 | |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 696 | /* This is for filter type. PNG 1.0-1.2 only define the single type. */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 697 | #define PNG_FILTER_TYPE_BASE 0 /* Single row per-byte filtering */ |
Glenn Randers-Pehrson | 2ad31ae | 2000-12-15 08:54:42 -0600 | [diff] [blame] | 698 | #define PNG_INTRAPIXEL_DIFFERENCING 64 /* Used only in MNG datastreams */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 699 | #define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE |
| 700 | |
| 701 | /* These are for the interlacing type. These values should NOT be changed. */ |
| 702 | #define PNG_INTERLACE_NONE 0 /* Non-interlaced image */ |
| 703 | #define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */ |
| 704 | #define PNG_INTERLACE_LAST 2 /* Not a valid value */ |
| 705 | |
| 706 | /* These are for the oFFs chunk. These values should NOT be changed. */ |
| 707 | #define PNG_OFFSET_PIXEL 0 /* Offset in pixels */ |
| 708 | #define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */ |
| 709 | #define PNG_OFFSET_LAST 2 /* Not a valid value */ |
| 710 | |
| 711 | /* These are for the pCAL chunk. These values should NOT be changed. */ |
| 712 | #define PNG_EQUATION_LINEAR 0 /* Linear transformation */ |
| 713 | #define PNG_EQUATION_BASE_E 1 /* Exponential base e transform */ |
| 714 | #define PNG_EQUATION_ARBITRARY 2 /* Arbitrary base exponential transform */ |
| 715 | #define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */ |
| 716 | #define PNG_EQUATION_LAST 4 /* Not a valid value */ |
| 717 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 718 | /* These are for the sCAL chunk. These values should NOT be changed. */ |
| 719 | #define PNG_SCALE_UNKNOWN 0 /* unknown unit (image scale) */ |
| 720 | #define PNG_SCALE_METER 1 /* meters per pixel */ |
| 721 | #define PNG_SCALE_RADIAN 2 /* radians per pixel */ |
| 722 | #define PNG_SCALE_LAST 3 /* Not a valid value */ |
| 723 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 724 | /* These are for the pHYs chunk. These values should NOT be changed. */ |
| 725 | #define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */ |
| 726 | #define PNG_RESOLUTION_METER 1 /* pixels/meter */ |
| 727 | #define PNG_RESOLUTION_LAST 2 /* Not a valid value */ |
| 728 | |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 729 | /* These are for the sRGB chunk. These values should NOT be changed. */ |
Glenn Randers-Pehrson | 5379b24 | 1999-11-27 10:22:33 -0600 | [diff] [blame] | 730 | #define PNG_sRGB_INTENT_PERCEPTUAL 0 |
| 731 | #define PNG_sRGB_INTENT_RELATIVE 1 |
| 732 | #define PNG_sRGB_INTENT_SATURATION 2 |
| 733 | #define PNG_sRGB_INTENT_ABSOLUTE 3 |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 734 | #define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */ |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 735 | |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 736 | /* This is for text chunks */ |
| 737 | #define PNG_KEYWORD_MAX_LENGTH 79 |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 738 | |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 739 | /* Maximum number of entries in PLTE/sPLT/tRNS arrays */ |
Glenn Randers-Pehrson | d1e8c86 | 2002-06-20 06:54:34 -0500 | [diff] [blame] | 740 | #define PNG_MAX_PALETTE_LENGTH 256 |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 741 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 742 | /* These determine if an ancillary chunk's data has been successfully read |
| 743 | * from the PNG header, or if the application has filled in the corresponding |
| 744 | * data in the info_struct to be written into the output file. The values |
| 745 | * of the PNG_INFO_<chunk> defines should NOT be changed. |
| 746 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 747 | #define PNG_INFO_gAMA 0x0001 |
| 748 | #define PNG_INFO_sBIT 0x0002 |
| 749 | #define PNG_INFO_cHRM 0x0004 |
| 750 | #define PNG_INFO_PLTE 0x0008 |
| 751 | #define PNG_INFO_tRNS 0x0010 |
| 752 | #define PNG_INFO_bKGD 0x0020 |
| 753 | #define PNG_INFO_hIST 0x0040 |
| 754 | #define PNG_INFO_pHYs 0x0080 |
| 755 | #define PNG_INFO_oFFs 0x0100 |
| 756 | #define PNG_INFO_tIME 0x0200 |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 757 | #define PNG_INFO_pCAL 0x0400 |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 758 | #define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */ |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 759 | #define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ |
| 760 | #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ |
| 761 | #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 762 | #define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 763 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 764 | /* This is used for the transformation routines, as some of them |
| 765 | * change these values for the row. It also should enable using |
| 766 | * the routines for other purposes. |
| 767 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 768 | typedef struct png_row_info_struct |
| 769 | { |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame^] | 770 | png_uint_32 width; /* width of row */ |
| 771 | png_size_t rowbytes; /* number of bytes in row */ |
| 772 | png_byte color_type; /* color type of row */ |
| 773 | png_byte bit_depth; /* bit depth of row */ |
| 774 | png_byte channels; /* number of channels (1, 2, 3, or 4) */ |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 775 | png_byte pixel_depth; /* bits per pixel (depth * channels) */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 776 | } png_row_info; |
| 777 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 778 | typedef png_row_info FAR * png_row_infop; |
| 779 | typedef png_row_info FAR * FAR * png_row_infopp; |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 780 | |
Glenn Randers-Pehrson | 8686fff | 1998-05-21 09:27:50 -0500 | [diff] [blame] | 781 | /* These are the function types for the I/O functions and for the functions |
| 782 | * that allow the user to override the default I/O functions with his or her |
| 783 | * own. The png_error_ptr type should match that of user-supplied warning |
| 784 | * and error functions, while the png_rw_ptr type should match that of the |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 785 | * user read/write data functions. Note that the 'write' function must not |
Glenn Randers-Pehrson | ea2f7e0 | 2010-08-18 08:14:54 -0500 | [diff] [blame] | 786 | * modify the buffer it is passed. The 'read' function, on the other hand, is |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 787 | * expected to return the read data in the buffer. |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 788 | */ |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 789 | typedef struct png_struct_def png_struct; |
| 790 | typedef png_struct FAR * png_structp; |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 791 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 792 | typedef PNG_CALLBACK(void, *png_error_ptr, (png_structp, png_const_charp), ); |
| 793 | typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t), ); |
| 794 | typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp), ); |
| 795 | typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32, |
| 796 | int), ); |
| 797 | typedef PNG_CALLBACK(void, *png_write_status_ptr, (png_structp, png_uint_32, |
| 798 | int), ); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 799 | |
Guy Schalnat | 69b1448 | 1996-01-10 02:56:49 -0600 | [diff] [blame] | 800 | #ifdef PNG_PROGRESSIVE_READ_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 801 | typedef PNG_CALLBACK(void, *png_progressive_info_ptr, |
| 802 | (png_structp, png_infop), ); |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame^] | 803 | typedef PNG_CALLBACK(void, *png_progressive_end_ptr, |
| 804 | (png_structp, png_infop), ); |
| 805 | typedef PNG_CALLBACK(void, *png_progressive_row_ptr, |
| 806 | (png_structp, png_bytep, png_uint_32, int), ); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 807 | #endif |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 808 | |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 809 | #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ |
Glenn Randers-Pehrson | 33188ac | 2009-06-16 14:12:35 -0500 | [diff] [blame] | 810 | defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame^] | 811 | typedef PNG_CALLBACK(void, *png_user_transform_ptr, |
| 812 | (png_structp, png_row_infop, png_bytep), ); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 813 | #endif |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 814 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 815 | #ifdef PNG_USER_CHUNKS_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 816 | typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp, |
| 817 | png_unknown_chunkp), ); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 818 | #endif |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 819 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 820 | typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp), ); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 821 | #endif |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame^] | 822 | |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 823 | #ifdef PNG_SETJMP_SUPPORTED |
| 824 | /* This must match the function definition in <setjmp.h>, and the |
| 825 | * application must include this before png.h to obtain the definition |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame] | 826 | * of jmp_buf. The function is required to be PNG_NORETURN. (Note that |
| 827 | * PNG_PTR_NORETURN is used here because current versions of the Microsoft |
| 828 | * C compiler do not support the PNG_NORETURN attribute on a pointer.) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 829 | * |
| 830 | * If you get a type warning from the compiler when linking against this line |
| 831 | * then your compiler has 'longjmp' that does not match the requirements of the |
| 832 | * compiler that built libpng. You will have to write a wrapper function for |
| 833 | * your compiler's longjmp and call png_set_longjmp_fn directly (not via the |
| 834 | * png_jmpbuf macro.) |
| 835 | * |
| 836 | * If you get a warning here while building the library you will need to make |
| 837 | * changes to ensure that pnglibconf.h records the calling convention used by |
| 838 | * your compiler. This may be very difficult - try using a different compiler |
| 839 | * to build the library! |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 840 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 841 | typedef PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)), |
Glenn Randers-Pehrson | 77396b6 | 2010-08-02 08:00:10 -0500 | [diff] [blame] | 842 | PNG_PTR_NORETURN); |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 843 | #endif |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 844 | |
| 845 | /* Transform masks for the high-level interface */ |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 846 | #define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */ |
| 847 | #define PNG_TRANSFORM_STRIP_16 0x0001 /* read only */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 848 | #define PNG_TRANSFORM_STRIP_ALPHA 0x0002 /* read only */ |
| 849 | #define PNG_TRANSFORM_PACKING 0x0004 /* read and write */ |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 850 | #define PNG_TRANSFORM_PACKSWAP 0x0008 /* read and write */ |
| 851 | #define PNG_TRANSFORM_EXPAND 0x0010 /* read only */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 852 | #define PNG_TRANSFORM_INVERT_MONO 0x0020 /* read and write */ |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 853 | #define PNG_TRANSFORM_SHIFT 0x0040 /* read and write */ |
| 854 | #define PNG_TRANSFORM_BGR 0x0080 /* read and write */ |
| 855 | #define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 856 | #define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */ |
Glenn Randers-Pehrson | db66d44 | 2000-06-23 21:38:16 -0500 | [diff] [blame] | 857 | #define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */ |
Glenn Randers-Pehrson | 99708d5 | 2009-06-29 17:30:00 -0500 | [diff] [blame] | 858 | #define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only */ |
Glenn Randers-Pehrson | 1eb14e9 | 2008-12-10 07:14:45 -0600 | [diff] [blame] | 859 | /* Added to libpng-1.2.34 */ |
Glenn Randers-Pehrson | 0ffb71a | 2009-02-28 06:08:20 -0600 | [diff] [blame] | 860 | #define PNG_TRANSFORM_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER |
Glenn Randers-Pehrson | 99708d5 | 2009-06-29 17:30:00 -0500 | [diff] [blame] | 861 | #define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */ |
| 862 | /* Added to libpng-1.4.0 */ |
| 863 | #define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 864 | |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 865 | /* Flags for MNG supported features */ |
Glenn Randers-Pehrson | d56aca7 | 2000-11-23 11:51:42 -0600 | [diff] [blame] | 866 | #define PNG_FLAG_MNG_EMPTY_PLTE 0x01 |
Glenn Randers-Pehrson | d56aca7 | 2000-11-23 11:51:42 -0600 | [diff] [blame] | 867 | #define PNG_FLAG_MNG_FILTER_64 0x04 |
Glenn Randers-Pehrson | 408b421 | 2000-12-18 09:33:57 -0600 | [diff] [blame] | 868 | #define PNG_ALL_MNG_FEATURES 0x05 |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 869 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 870 | /* NOTE: prior to 1.5 these functions had no 'API' style declaration, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 871 | * this allowed the zlib default functions to be used on Windows |
| 872 | * platforms. In 1.5 the zlib default malloc (which just calls malloc and |
| 873 | * ignores the first argument) should be completely compatible with the |
| 874 | * following. |
| 875 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 876 | typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp, |
| 877 | png_alloc_size_t), ); |
| 878 | typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp), ); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 879 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 880 | typedef png_struct FAR * FAR * png_structpp; |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 881 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 882 | /* Section 3: exported functions |
| 883 | * Here are the function definitions most commonly used. This is not |
Glenn Randers-Pehrson | f3abb2c | 2010-10-17 12:51:53 -0500 | [diff] [blame] | 884 | * the place to find out how to use libpng. See libpng-manual.txt for the |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 885 | * full explanation, see example.c for the summary. This just provides |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 886 | * a simple one line description of the use of each function. |
Glenn Randers-Pehrson | a451725 | 2010-12-06 08:54:55 -0600 | [diff] [blame] | 887 | * |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 888 | * The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in |
| 889 | * pngconf.h and in the *.dfn files in the scripts directory. |
Glenn Randers-Pehrson | a451725 | 2010-12-06 08:54:55 -0600 | [diff] [blame] | 890 | * |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 891 | * PNG_EXPORT(ordinal, type, name, (args)); |
Glenn Randers-Pehrson | 27df3a4 | 2010-12-06 12:38:42 -0600 | [diff] [blame] | 892 | * |
| 893 | * ordinal: ordinal that is used while building |
| 894 | * *.def files. The ordinal value is only |
| 895 | * relevant when preprocessing png.h with |
| 896 | * the *.dfn files for building symbol table |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 897 | * entries, and are removed by pngconf.h. |
Glenn Randers-Pehrson | 27df3a4 | 2010-12-06 12:38:42 -0600 | [diff] [blame] | 898 | * type: return type of the function |
| 899 | * name: function name |
| 900 | * args: function arguments, with types |
| 901 | * |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 902 | * When we wish to append attributes to a function prototype we use |
| 903 | * the PNG_EXPORTA() macro instead. |
| 904 | * |
Glenn Randers-Pehrson | 27df3a4 | 2010-12-06 12:38:42 -0600 | [diff] [blame] | 905 | * PNG_EXPORTA(ordinal, type, name, (args), attributes); |
| 906 | * |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 907 | * ordinal, type, name, and args: same as in PNG_EXPORT(). |
Glenn Randers-Pehrson | 27df3a4 | 2010-12-06 12:38:42 -0600 | [diff] [blame] | 908 | * attributes: function attributes |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 909 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 910 | |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 911 | /* Returns the version number of the library */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 912 | PNG_EXPORT(1, png_uint_32, png_access_version_number, (void)); |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 913 | |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 914 | /* Tell lib we have already handled the first <num_bytes> magic bytes. |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 915 | * Handling more than 8 bytes from the beginning of the file is an error. |
| 916 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 917 | PNG_EXPORT(2, void, png_set_sig_bytes, (png_structp png_ptr, int num_bytes)); |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 918 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 919 | /* Check sig[start] through sig[start + num_to_check - 1] to see if it's a |
| 920 | * PNG file. Returns zero if the supplied bytes match the 8-byte PNG |
| 921 | * signature, and non-zero otherwise. Having num_to_check == 0 or |
| 922 | * start > 7 will always fail (ie return non-zero). |
| 923 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 924 | PNG_EXPORT(3, int, png_sig_cmp, (png_const_bytep sig, png_size_t start, |
Glenn Randers-Pehrson | 27df3a4 | 2010-12-06 12:38:42 -0600 | [diff] [blame] | 925 | png_size_t num_to_check)); |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 926 | |
Glenn Randers-Pehrson | 3e42a99 | 2010-03-31 22:16:07 -0500 | [diff] [blame] | 927 | /* Simple signature checking function. This is the same as calling |
| 928 | * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). |
| 929 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 930 | #define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n)) |
Glenn Randers-Pehrson | 3e42a99 | 2010-03-31 22:16:07 -0500 | [diff] [blame] | 931 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 932 | /* Allocate and initialize png_ptr struct for reading, and any other memory. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 933 | PNG_EXPORTA(4, png_structp, png_create_read_struct, |
| 934 | (png_const_charp user_png_ver, png_voidp error_ptr, |
| 935 | png_error_ptr error_fn, png_error_ptr warn_fn), |
Glenn Randers-Pehrson | 27df3a4 | 2010-12-06 12:38:42 -0600 | [diff] [blame] | 936 | PNG_ALLOCATED); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 937 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 938 | /* Allocate and initialize png_ptr struct for writing, and any other memory */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 939 | PNG_EXPORTA(5, png_structp, png_create_write_struct, |
| 940 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, |
| 941 | png_error_ptr warn_fn), |
Glenn Randers-Pehrson | 27df3a4 | 2010-12-06 12:38:42 -0600 | [diff] [blame] | 942 | PNG_ALLOCATED); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 943 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 944 | PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size, |
| 945 | (png_structp png_ptr)); |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 946 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 947 | PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr, |
Glenn Randers-Pehrson | 27df3a4 | 2010-12-06 12:38:42 -0600 | [diff] [blame] | 948 | png_size_t size)); |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 949 | |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 950 | /* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp |
| 951 | * match up. |
| 952 | */ |
| 953 | #ifdef PNG_SETJMP_SUPPORTED |
| 954 | /* This function returns the jmp_buf built in to *png_ptr. It must be |
| 955 | * supplied with an appropriate 'longjmp' function to use on that jmp_buf |
| 956 | * unless the default error function is overridden in which case NULL is |
| 957 | * acceptable. The size of the jmp_buf is checked against the actual size |
| 958 | * allocated by the library - the call will return NULL on a mismatch |
| 959 | * indicating an ABI mismatch. |
| 960 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 961 | PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr, |
Glenn Randers-Pehrson | 27df3a4 | 2010-12-06 12:38:42 -0600 | [diff] [blame] | 962 | png_longjmp_ptr longjmp_fn, size_t jmp_buf_size)); |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 963 | # define png_jmpbuf(png_ptr) \ |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 964 | (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf))) |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 965 | #else |
| 966 | # define png_jmpbuf(png_ptr) \ |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 967 | (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP) |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 968 | #endif |
Glenn Randers-Pehrson | f98726a | 2010-02-19 09:54:53 -0600 | [diff] [blame] | 969 | /* This function should be used by libpng applications in place of |
| 970 | * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it |
| 971 | * will use it; otherwise it will call PNG_ABORT(). This function was |
| 972 | * added in libpng-1.5.0. |
| 973 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 974 | PNG_EXPORTA(9, void, png_longjmp, (png_structp png_ptr, int val), |
| 975 | PNG_NORETURN); |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 976 | |
Glenn Randers-Pehrson | 2b8bef1 | 2010-04-29 11:50:24 -0500 | [diff] [blame] | 977 | #ifdef PNG_READ_SUPPORTED |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 978 | /* Reset the compression stream */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 979 | PNG_EXPORT(10, int, png_reset_zstream, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 2b8bef1 | 2010-04-29 11:50:24 -0500 | [diff] [blame] | 980 | #endif |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 981 | |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 982 | /* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */ |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 983 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 984 | PNG_EXPORTA(11, png_structp, png_create_read_struct_2, |
| 985 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, |
| 986 | png_error_ptr warn_fn, |
| 987 | png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), |
| 988 | PNG_ALLOCATED); |
| 989 | PNG_EXPORTA(12, png_structp, png_create_write_struct_2, |
| 990 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, |
| 991 | png_error_ptr warn_fn, |
| 992 | png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), |
| 993 | PNG_ALLOCATED); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 994 | #endif |
| 995 | |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 996 | /* Write the PNG file signature. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 997 | PNG_EXPORT(13, void, png_write_sig, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 998 | |
Glenn Randers-Pehrson | cbe52d8 | 1998-02-28 07:00:24 -0600 | [diff] [blame] | 999 | /* Write a PNG chunk - size, type, (optional) data, CRC. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1000 | PNG_EXPORT(14, void, png_write_chunk, (png_structp png_ptr, png_const_bytep |
| 1001 | chunk_name, png_const_bytep data, png_size_t length)); |
Glenn Randers-Pehrson | cbe52d8 | 1998-02-28 07:00:24 -0600 | [diff] [blame] | 1002 | |
| 1003 | /* Write the start of a PNG chunk - length and chunk name. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1004 | PNG_EXPORT(15, void, png_write_chunk_start, (png_structp png_ptr, |
| 1005 | png_const_bytep chunk_name, png_uint_32 length)); |
Glenn Randers-Pehrson | cbe52d8 | 1998-02-28 07:00:24 -0600 | [diff] [blame] | 1006 | |
| 1007 | /* Write the data of a PNG chunk started with png_write_chunk_start(). */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1008 | PNG_EXPORT(16, void, png_write_chunk_data, (png_structp png_ptr, |
| 1009 | png_const_bytep data, png_size_t length)); |
Glenn Randers-Pehrson | cbe52d8 | 1998-02-28 07:00:24 -0600 | [diff] [blame] | 1010 | |
| 1011 | /* Finish a chunk started with png_write_chunk_start() (includes CRC). */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1012 | PNG_EXPORT(17, void, png_write_chunk_end, (png_structp png_ptr)); |
Glenn Randers-Pehrson | cbe52d8 | 1998-02-28 07:00:24 -0600 | [diff] [blame] | 1013 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1014 | /* Allocate and initialize the info structure */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1015 | PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_structp png_ptr), |
| 1016 | PNG_ALLOCATED); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1017 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1018 | PNG_EXPORT(19, void, png_info_init_3, (png_infopp info_ptr, |
| 1019 | png_size_t png_info_struct_size)); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1020 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1021 | /* Writes all the PNG information before the image. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1022 | PNG_EXPORT(20, void, png_write_info_before_PLTE, |
| 1023 | (png_structp png_ptr, png_infop info_ptr)); |
| 1024 | PNG_EXPORT(21, void, png_write_info, |
| 1025 | (png_structp png_ptr, png_infop info_ptr)); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1026 | |
Glenn Randers-Pehrson | dbd4014 | 2009-08-31 08:42:02 -0500 | [diff] [blame] | 1027 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1028 | /* Read the information before the actual image data. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1029 | PNG_EXPORT(22, void, png_read_info, |
| 1030 | (png_structp png_ptr, png_infop info_ptr)); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1031 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1032 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1033 | #ifdef PNG_TIME_RFC1123_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1034 | PNG_EXPORT(23, png_const_charp, png_convert_to_rfc1123, |
| 1035 | (png_structp png_ptr, |
| 1036 | png_const_timep ptime)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1037 | #endif |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 1038 | |
Glenn Randers-Pehrson | 0cb46e2 | 2009-11-02 11:24:33 -0600 | [diff] [blame] | 1039 | #ifdef PNG_CONVERT_tIME_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1040 | /* Convert from a struct tm to png_time */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1041 | PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime, |
| 1042 | PNG_CONST struct tm FAR * ttime)); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1043 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1044 | /* Convert from time_t to png_time. Uses gmtime() */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1045 | PNG_EXPORT(25, void, png_convert_from_time_t, |
| 1046 | (png_timep ptime, time_t ttime)); |
Glenn Randers-Pehrson | 0cb46e2 | 2009-11-02 11:24:33 -0600 | [diff] [blame] | 1047 | #endif /* PNG_CONVERT_tIME_SUPPORTED */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1048 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1049 | #ifdef PNG_READ_EXPAND_SUPPORTED |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1050 | /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1051 | PNG_EXPORT(26, void, png_set_expand, (png_structp png_ptr)); |
| 1052 | PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structp png_ptr)); |
| 1053 | PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structp png_ptr)); |
| 1054 | PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1055 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1056 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1057 | #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1058 | /* Use blue, green, red order for pixels. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1059 | PNG_EXPORT(30, void, png_set_bgr, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1060 | #endif |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1061 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1062 | #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1063 | /* Expand the grayscale to 24-bit RGB if necessary. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1064 | PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr)); |
Guy Schalnat | 69b1448 | 1996-01-10 02:56:49 -0600 | [diff] [blame] | 1065 | |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 1066 | /* Reduce RGB to grayscale. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1067 | PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr, |
| 1068 | int error_action, double red, double green)); |
| 1069 | PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr, |
| 1070 | int error_action, png_fixed_point red, png_fixed_point green)); |
Glenn Randers-Pehrson | a272d8f | 2010-06-25 21:45:31 -0500 | [diff] [blame] | 1071 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1072 | PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1073 | #endif |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1074 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1075 | PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth, |
| 1076 | png_colorp palette)); |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1077 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1078 | #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1079 | PNG_EXPORT(36, void, png_set_strip_alpha, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1080 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1081 | |
| 1082 | #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ |
| 1083 | defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1084 | PNG_EXPORT(37, void, png_set_swap_alpha, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1085 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1086 | |
Glenn Randers-Pehrson | c4a2ae6 | 1998-01-16 22:06:18 -0600 | [diff] [blame] | 1087 | #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ |
| 1088 | defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1089 | PNG_EXPORT(38, void, png_set_invert_alpha, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1090 | #endif |
Glenn Randers-Pehrson | c4a2ae6 | 1998-01-16 22:06:18 -0600 | [diff] [blame] | 1091 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1092 | #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) |
Glenn Randers-Pehrson | 67864af | 2004-08-28 23:30:07 -0500 | [diff] [blame] | 1093 | /* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1094 | PNG_EXPORT(39, void, png_set_filler, (png_structp png_ptr, png_uint_32 filler, |
| 1095 | int flags)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1096 | /* The values of the PNG_FILLER_ defines should NOT be changed */ |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 1097 | # define PNG_FILLER_BEFORE 0 |
| 1098 | # define PNG_FILLER_AFTER 1 |
Glenn Randers-Pehrson | 67864af | 2004-08-28 23:30:07 -0500 | [diff] [blame] | 1099 | /* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1100 | PNG_EXPORT(40, void, png_set_add_alpha, |
| 1101 | (png_structp png_ptr, png_uint_32 filler, |
| 1102 | int flags)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1103 | #endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1104 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1105 | #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1106 | /* Swap bytes in 16-bit depth files. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1107 | PNG_EXPORT(41, void, png_set_swap, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1108 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1109 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1110 | #if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1111 | /* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1112 | PNG_EXPORT(42, void, png_set_packing, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1113 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1114 | |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1115 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ |
| 1116 | defined(PNG_WRITE_PACKSWAP_SUPPORTED) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1117 | /* Swap packing order of pixels in bytes. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1118 | PNG_EXPORT(43, void, png_set_packswap, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1119 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1120 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1121 | #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1122 | /* Converts files to legal bit depths. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1123 | PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p |
| 1124 | true_bits)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1125 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1126 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1127 | #if defined(PNG_READ_INTERLACING_SUPPORTED) || \ |
| 1128 | defined(PNG_WRITE_INTERLACING_SUPPORTED) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1129 | /* Have the code handle the interlacing. Returns the number of passes. |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame^] | 1130 | * MUST be called before png_read_update_info or png_start_read_image, |
| 1131 | * otherwise it will not have the desired effect. Note that it is still |
| 1132 | * necessary to call png_read_row or png_read_rows png_get_image_height |
| 1133 | * times for each pass. |
| 1134 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1135 | PNG_EXPORT(45, int, png_set_interlace_handling, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1136 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1137 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1138 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame^] | 1139 | /* Alternatively call this to get the number of rows in the current pass. |
| 1140 | * Call this after png_read_update_info or png_start_read_image; if you |
| 1141 | * call it before it will just return the image height (which is also what |
| 1142 | * it returns for a non-interlaced image!). |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1143 | * |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame^] | 1144 | * NOTE: you need to call these to find out how many times to call |
| 1145 | * png_read_row if you handle your own de-interlacing. |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1146 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1147 | PNG_EXPORT(215, int, png_get_num_passes, (png_structp png_ptr)); |
| 1148 | PNG_EXPORT(216, png_uint_32, png_get_num_rows, (png_structp png_ptr)); |
| 1149 | PNG_EXPORT(218, png_uint_32, png_get_num_cols, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1150 | #endif |
| 1151 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1152 | #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) |
Glenn Randers-Pehrson | 104622b | 2000-05-29 08:58:03 -0500 | [diff] [blame] | 1153 | /* Invert monochrome files */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1154 | PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1155 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1156 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1157 | #ifdef PNG_READ_BACKGROUND_SUPPORTED |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1158 | /* Handle alpha and tRNS by replacing with a background color. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1159 | PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr, |
| 1160 | png_const_color_16p background_color, int background_gamma_code, |
| 1161 | int need_expand, double background_gamma)); |
| 1162 | PNG_FIXED_EXPORT(217, void, png_set_background_fixed, (png_structp png_ptr, |
| 1163 | png_const_color_16p background_color, int background_gamma_code, |
| 1164 | int need_expand, png_fixed_point background_gamma)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1165 | #endif |
| 1166 | #ifdef PNG_READ_BACKGROUND_SUPPORTED |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 1167 | # define PNG_BACKGROUND_GAMMA_UNKNOWN 0 |
| 1168 | # define PNG_BACKGROUND_GAMMA_SCREEN 1 |
| 1169 | # define PNG_BACKGROUND_GAMMA_FILE 2 |
| 1170 | # define PNG_BACKGROUND_GAMMA_UNIQUE 3 |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1171 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1172 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1173 | #ifdef PNG_READ_16_TO_8_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1174 | /* Strip the second byte of information from a 16-bit depth file. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1175 | PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1176 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1177 | |
Glenn Randers-Pehrson | 3cd7cff | 2010-04-16 19:27:08 -0500 | [diff] [blame] | 1178 | #ifdef PNG_READ_QUANTIZE_SUPPORTED |
| 1179 | /* Turn on quantizing, and reduce the palette to the number of colors |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1180 | * available. |
| 1181 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1182 | PNG_EXPORT(49, void, png_set_quantize, |
| 1183 | (png_structp png_ptr, png_colorp palette, |
| 1184 | int num_palette, int maximum_colors, png_const_uint_16p histogram, |
| 1185 | int full_quantize)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1186 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1187 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1188 | #ifdef PNG_READ_GAMMA_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1189 | /* The threshold on gamma processing is configurable but hard-wired into the |
| 1190 | * library. The following is the floating point variant. |
| 1191 | */ |
| 1192 | #define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001) |
| 1193 | |
Glenn Randers-Pehrson | bcfd15d | 1999-10-01 14:22:25 -0500 | [diff] [blame] | 1194 | /* Handle gamma correction. Screen_gamma=(display_exponent) */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1195 | PNG_FP_EXPORT(50, void, png_set_gamma, |
| 1196 | (png_structp png_ptr, double screen_gamma, |
| 1197 | double default_file_gamma)); |
| 1198 | PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr, |
| 1199 | png_fixed_point screen_gamma, png_fixed_point default_file_gamma)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1200 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1201 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1202 | #ifdef PNG_WRITE_FLUSH_SUPPORTED |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 1203 | /* Set how many lines between output flushes - 0 for no flushing */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1204 | PNG_EXPORT(51, void, png_set_flush, (png_structp png_ptr, int nrows)); |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 1205 | /* Flush the current PNG output buffer */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1206 | PNG_EXPORT(52, void, png_write_flush, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1207 | #endif |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 1208 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1209 | /* Optional update palette with requested transformations */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1210 | PNG_EXPORT(53, void, png_start_read_image, (png_structp png_ptr)); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1211 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1212 | /* Optional call to update the users info structure */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1213 | PNG_EXPORT(54, void, png_read_update_info, |
| 1214 | (png_structp png_ptr, png_infop info_ptr)); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1215 | |
Glenn Randers-Pehrson | dbd4014 | 2009-08-31 08:42:02 -0500 | [diff] [blame] | 1216 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1217 | /* Read one or more rows of image data. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1218 | PNG_EXPORT(55, void, png_read_rows, (png_structp png_ptr, png_bytepp row, |
| 1219 | png_bytepp display_row, png_uint_32 num_rows)); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1220 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1221 | |
Glenn Randers-Pehrson | dbd4014 | 2009-08-31 08:42:02 -0500 | [diff] [blame] | 1222 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1223 | /* Read a row of data. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1224 | PNG_EXPORT(56, void, png_read_row, (png_structp png_ptr, png_bytep row, |
| 1225 | png_bytep display_row)); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1226 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1227 | |
Glenn Randers-Pehrson | dbd4014 | 2009-08-31 08:42:02 -0500 | [diff] [blame] | 1228 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1229 | /* Read the whole image into memory at once. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1230 | PNG_EXPORT(57, void, png_read_image, (png_structp png_ptr, png_bytepp image)); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1231 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1232 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1233 | /* Write a row of image data */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1234 | PNG_EXPORT(58, void, png_write_row, |
| 1235 | (png_structp png_ptr, png_const_bytep row)); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1236 | |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame^] | 1237 | /* Write a few rows of image data: (*row) is not written; however, the type |
| 1238 | * is declared as writeable to maintain compatibility with previous versions |
| 1239 | * of libpng and to allow the 'display_row' array from read_rows to be passed |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1240 | * unchanged to write_rows. |
| 1241 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1242 | PNG_EXPORT(59, void, png_write_rows, (png_structp png_ptr, png_bytepp row, |
| 1243 | png_uint_32 num_rows)); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1244 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1245 | /* Write the image data */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1246 | PNG_EXPORT(60, void, png_write_image, |
| 1247 | (png_structp png_ptr, png_bytepp image)); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1248 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1249 | /* Write the end of the PNG file. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1250 | PNG_EXPORT(61, void, png_write_end, |
| 1251 | (png_structp png_ptr, png_infop info_ptr)); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1252 | |
Glenn Randers-Pehrson | dbd4014 | 2009-08-31 08:42:02 -0500 | [diff] [blame] | 1253 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1254 | /* Read the end of the PNG file. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1255 | PNG_EXPORT(62, void, png_read_end, (png_structp png_ptr, png_infop info_ptr)); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1256 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1257 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1258 | /* Free any memory associated with the png_info_struct */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1259 | PNG_EXPORT(63, void, png_destroy_info_struct, (png_structp png_ptr, |
| 1260 | png_infopp info_ptr_ptr)); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1261 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1262 | /* Free any memory associated with the png_struct and the png_info_structs */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1263 | PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr, |
| 1264 | png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1265 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1266 | /* Free any memory associated with the png_struct and the png_info_structs */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1267 | PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr, |
| 1268 | png_infopp info_ptr_ptr)); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1269 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1270 | /* Set the libpng method of handling chunk CRC errors */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1271 | PNG_EXPORT(66, void, png_set_crc_action, |
| 1272 | (png_structp png_ptr, int crit_action, int ancil_action)); |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1273 | |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame^] | 1274 | /* Values for png_set_crc_action() say how to handle CRC errors in |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1275 | * ancillary and critical chunks, and whether to use the data contained |
| 1276 | * therein. Note that it is impossible to "discard" data in a critical |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1277 | * chunk. For versions prior to 0.90, the action was always error/quit, |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1278 | * whereas in version 0.90 and later, the action for CRC errors in ancillary |
| 1279 | * chunks is warn/discard. These values should NOT be changed. |
| 1280 | * |
| 1281 | * value action:critical action:ancillary |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1282 | */ |
| 1283 | #define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */ |
| 1284 | #define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */ |
| 1285 | #define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */ |
| 1286 | #define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */ |
| 1287 | #define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ |
| 1288 | #define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ |
| 1289 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1290 | /* These functions give the user control over the scan-line filtering in |
| 1291 | * libpng and the compression methods used by zlib. These functions are |
| 1292 | * mainly useful for testing, as the defaults should work with most users. |
| 1293 | * Those users who are tight on memory or want faster performance at the |
| 1294 | * expense of compression can modify them. See the compression library |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 1295 | * header file (zlib.h) for an explination of the compression functions. |
| 1296 | */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1297 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1298 | /* Set the filtering method(s) used by libpng. Currently, the only valid |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 1299 | * value for "method" is 0. |
| 1300 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1301 | PNG_EXPORT(67, void, png_set_filter, |
| 1302 | (png_structp png_ptr, int method, int filters)); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1303 | |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1304 | /* Flags for png_set_filter() to say which filters to use. The flags |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1305 | * are chosen so that they don't conflict with real filter types |
| 1306 | * below, in case they are supplied instead of the #defined constants. |
| 1307 | * These values should NOT be changed. |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1308 | */ |
| 1309 | #define PNG_NO_FILTERS 0x00 |
| 1310 | #define PNG_FILTER_NONE 0x08 |
| 1311 | #define PNG_FILTER_SUB 0x10 |
| 1312 | #define PNG_FILTER_UP 0x20 |
| 1313 | #define PNG_FILTER_AVG 0x40 |
| 1314 | #define PNG_FILTER_PAETH 0x80 |
| 1315 | #define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \ |
| 1316 | PNG_FILTER_AVG | PNG_FILTER_PAETH) |
| 1317 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1318 | /* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now. |
| 1319 | * These defines should NOT be changed. |
| 1320 | */ |
| 1321 | #define PNG_FILTER_VALUE_NONE 0 |
| 1322 | #define PNG_FILTER_VALUE_SUB 1 |
| 1323 | #define PNG_FILTER_VALUE_UP 2 |
| 1324 | #define PNG_FILTER_VALUE_AVG 3 |
| 1325 | #define PNG_FILTER_VALUE_PAETH 4 |
| 1326 | #define PNG_FILTER_VALUE_LAST 5 |
| 1327 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1328 | #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* EXPERIMENTAL */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1329 | /* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_ |
| 1330 | * defines, either the default (minimum-sum-of-absolute-differences), or |
| 1331 | * the experimental method (weighted-minimum-sum-of-absolute-differences). |
| 1332 | * |
| 1333 | * Weights are factors >= 1.0, indicating how important it is to keep the |
| 1334 | * filter type consistent between rows. Larger numbers mean the current |
| 1335 | * filter is that many times as likely to be the same as the "num_weights" |
| 1336 | * previous filters. This is cumulative for each previous row with a weight. |
| 1337 | * There needs to be "num_weights" values in "filter_weights", or it can be |
| 1338 | * NULL if the weights aren't being specified. Weights have no influence on |
| 1339 | * the selection of the first row filter. Well chosen weights can (in theory) |
| 1340 | * improve the compression for a given image. |
| 1341 | * |
| 1342 | * Costs are factors >= 1.0 indicating the relative decoding costs of a |
| 1343 | * filter type. Higher costs indicate more decoding expense, and are |
| 1344 | * therefore less likely to be selected over a filter with lower computational |
| 1345 | * costs. There needs to be a value in "filter_costs" for each valid filter |
| 1346 | * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't |
| 1347 | * setting the costs. Costs try to improve the speed of decompression without |
| 1348 | * unduly increasing the compressed image size. |
| 1349 | * |
| 1350 | * A negative weight or cost indicates the default value is to be used, and |
| 1351 | * values in the range [0.0, 1.0) indicate the value is to remain unchanged. |
| 1352 | * The default values for both weights and costs are currently 1.0, but may |
| 1353 | * change if good general weighting/cost heuristics can be found. If both |
| 1354 | * the weights and costs are set to 1.0, this degenerates the WEIGHTED method |
| 1355 | * to the UNWEIGHTED method, but with added encoding time/computation. |
| 1356 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1357 | PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr, |
| 1358 | int heuristic_method, int num_weights, png_const_doublep filter_weights, |
| 1359 | png_const_doublep filter_costs)); |
| 1360 | PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, |
| 1361 | (png_structp png_ptr, |
Glenn Randers-Pehrson | e600c51 | 2010-08-18 07:25:46 -0500 | [diff] [blame] | 1362 | int heuristic_method, int num_weights, png_const_fixed_point_p |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1363 | filter_weights, png_const_fixed_point_p filter_costs)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1364 | #endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ |
| 1365 | |
| 1366 | /* Heuristic used for row filter selection. These defines should NOT be |
| 1367 | * changed. |
| 1368 | */ |
| 1369 | #define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */ |
| 1370 | #define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */ |
| 1371 | #define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ |
| 1372 | #define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ |
| 1373 | |
| 1374 | /* Set the library compression level. Currently, valid values range from |
| 1375 | * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 |
| 1376 | * (0 - no compression, 9 - "maximal" compression). Note that tests have |
| 1377 | * shown that zlib compression levels 3-6 usually perform as well as level 9 |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1378 | * for PNG images, and do considerably fewer caclulations. In the future, |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1379 | * these values may not correspond directly to the zlib compression levels. |
| 1380 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1381 | PNG_EXPORT(69, void, png_set_compression_level, |
| 1382 | (png_structp png_ptr, int level)); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1383 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1384 | PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structp png_ptr, |
| 1385 | int mem_level)); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1386 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1387 | PNG_EXPORT(71, void, png_set_compression_strategy, (png_structp png_ptr, |
| 1388 | int strategy)); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1389 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1390 | PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr, |
| 1391 | int window_bits)); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1392 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1393 | PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr, |
| 1394 | int method)); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1395 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1396 | /* These next functions are called for input/output, memory, and error |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1397 | * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1398 | * and call standard C I/O routines such as fread(), fwrite(), and |
| 1399 | * fprintf(). These functions can be made to use other I/O routines |
| 1400 | * at run time for those applications that need to handle I/O in a |
Glenn Randers-Pehrson | f3abb2c | 2010-10-17 12:51:53 -0500 | [diff] [blame] | 1401 | * different manner by calling png_set_???_fn(). See libpng-manual.txt for |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1402 | * more information. |
| 1403 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1404 | |
Glenn Randers-Pehrson | dbd4014 | 2009-08-31 08:42:02 -0500 | [diff] [blame] | 1405 | #ifdef PNG_STDIO_SUPPORTED |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1406 | /* Initialize the input/output for the PNG file to the default functions. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1407 | PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp)); |
Glenn Randers-Pehrson | 70e3f54 | 1998-01-03 22:40:55 -0600 | [diff] [blame] | 1408 | #endif |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1409 | |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1410 | /* Replace the (error and abort), and warning functions with user |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1411 | * supplied functions. If no messages are to be printed you must still |
| 1412 | * write and use replacement functions. The replacement error_fn should |
| 1413 | * still do a longjmp to the last setjmp location if you are using this |
| 1414 | * method of error handling. If error_fn or warning_fn is NULL, the |
| 1415 | * default function will be used. |
| 1416 | */ |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 1417 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1418 | PNG_EXPORT(75, void, png_set_error_fn, |
| 1419 | (png_structp png_ptr, png_voidp error_ptr, |
| 1420 | png_error_ptr error_fn, png_error_ptr warning_fn)); |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1421 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1422 | /* Return the user pointer associated with the error functions */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1423 | PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_structp png_ptr)); |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1424 | |
| 1425 | /* Replace the default data output functions with a user supplied one(s). |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1426 | * If buffered output is not used, then output_flush_fn can be set to NULL. |
| 1427 | * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time |
| 1428 | * output_flush_fn will be ignored (and thus can be NULL). |
Glenn Randers-Pehrson | 8fb550c | 2009-03-21 08:15:32 -0500 | [diff] [blame] | 1429 | * It is probably a mistake to use NULL for output_flush_fn if |
| 1430 | * write_data_fn is not also NULL unless you have built libpng with |
| 1431 | * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's |
| 1432 | * default flush function, which uses the standard *FILE structure, will |
| 1433 | * be used. |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1434 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1435 | PNG_EXPORT(77, void, png_set_write_fn, (png_structp png_ptr, png_voidp io_ptr, |
| 1436 | png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1437 | |
| 1438 | /* Replace the default data input function with a user supplied one. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1439 | PNG_EXPORT(78, void, png_set_read_fn, (png_structp png_ptr, png_voidp io_ptr, |
| 1440 | png_rw_ptr read_data_fn)); |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1441 | |
| 1442 | /* Return the user pointer associated with the I/O functions */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1443 | PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_structp png_ptr)); |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1444 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1445 | PNG_EXPORT(80, void, png_set_read_status_fn, (png_structp png_ptr, |
| 1446 | png_read_status_ptr read_row_fn)); |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 1447 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1448 | PNG_EXPORT(81, void, png_set_write_status_fn, (png_structp png_ptr, |
| 1449 | png_write_status_ptr write_row_fn)); |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 1450 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1451 | #ifdef PNG_USER_MEM_SUPPORTED |
| 1452 | /* Replace the default memory allocation functions with user supplied one(s). */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1453 | PNG_EXPORT(82, void, png_set_mem_fn, (png_structp png_ptr, png_voidp mem_ptr, |
| 1454 | png_malloc_ptr malloc_fn, png_free_ptr free_fn)); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1455 | /* Return the user pointer associated with the memory functions */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1456 | PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1457 | #endif |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1458 | |
Glenn Randers-Pehrson | 33188ac | 2009-06-16 14:12:35 -0500 | [diff] [blame] | 1459 | #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1460 | PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structp png_ptr, |
| 1461 | png_user_transform_ptr read_user_transform_fn)); |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 1462 | #endif |
| 1463 | |
Glenn Randers-Pehrson | 33188ac | 2009-06-16 14:12:35 -0500 | [diff] [blame] | 1464 | #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1465 | PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structp png_ptr, |
| 1466 | png_user_transform_ptr write_user_transform_fn)); |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 1467 | #endif |
| 1468 | |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1469 | #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ |
Glenn Randers-Pehrson | 33188ac | 2009-06-16 14:12:35 -0500 | [diff] [blame] | 1470 | defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1471 | PNG_EXPORT(86, void, png_set_user_transform_info, (png_structp png_ptr, |
| 1472 | png_voidp user_transform_ptr, int user_transform_depth, |
| 1473 | int user_transform_channels)); |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1474 | /* Return the user pointer associated with the user transform functions */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1475 | PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1476 | #endif |
| 1477 | |
Glenn Randers-Pehrson | 1909560 | 2001-03-14 07:08:39 -0600 | [diff] [blame] | 1478 | #ifdef PNG_USER_CHUNKS_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1479 | PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structp png_ptr, |
| 1480 | png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); |
| 1481 | PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1482 | #endif |
| 1483 | |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 1484 | #ifdef PNG_PROGRESSIVE_READ_SUPPORTED |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1485 | /* Sets the function callbacks for the push reader, and a pointer to a |
| 1486 | * user-defined structure available to the callback functions. |
| 1487 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1488 | PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr, |
| 1489 | png_voidp progressive_ptr, png_progressive_info_ptr info_fn, |
| 1490 | png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn)); |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1491 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1492 | /* Returns the user pointer associated with the push read functions */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1493 | PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_structp png_ptr)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1494 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1495 | /* Function to be called when data becomes available */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1496 | PNG_EXPORT(92, void, png_process_data, |
| 1497 | (png_structp png_ptr, png_infop info_ptr, |
| 1498 | png_bytep buffer, png_size_t buffer_size)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1499 | |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame^] | 1500 | /* Function that combines rows. 'new_row' is a flag that should come from |
| 1501 | * the callback and be non-NULL if anything needs to be done; the library |
| 1502 | * stores its own version of the new data internally and ignores the passed |
| 1503 | * in value. |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1504 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1505 | PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr, |
| 1506 | png_bytep old_row, png_const_bytep new_row)); |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 1507 | #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1508 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1509 | PNG_EXPORTA(94, png_voidp, png_malloc, |
| 1510 | (png_structp png_ptr, png_alloc_size_t size), |
| 1511 | PNG_ALLOCATED); |
Glenn Randers-Pehrson | 0ffb71a | 2009-02-28 06:08:20 -0600 | [diff] [blame] | 1512 | /* Added at libpng version 1.4.0 */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1513 | PNG_EXPORTA(95, png_voidp, png_calloc, |
| 1514 | (png_structp png_ptr, png_alloc_size_t size), |
| 1515 | PNG_ALLOCATED); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1516 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 1517 | /* Added at libpng version 1.2.4 */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1518 | PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_structp png_ptr, |
| 1519 | png_alloc_size_t size), PNG_ALLOCATED); |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 1520 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 1521 | /* Frees a pointer allocated by png_malloc() */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1522 | PNG_EXPORT(97, void, png_free, (png_structp png_ptr, png_voidp ptr)); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1523 | |
Glenn Randers-Pehrson | 38e6e77 | 2000-04-09 19:06:13 -0500 | [diff] [blame] | 1524 | /* Free data that was allocated internally */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1525 | PNG_EXPORT(98, void, png_free_data, |
| 1526 | (png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num)); |
| 1527 | |
Glenn Randers-Pehrson | 38e6e77 | 2000-04-09 19:06:13 -0500 | [diff] [blame] | 1528 | /* Reassign responsibility for freeing existing data, whether allocated |
| 1529 | * by libpng or by the application */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1530 | PNG_EXPORT(99, void, png_data_freer, |
| 1531 | (png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask)); |
| 1532 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1533 | /* Assignments for png_data_freer */ |
Glenn Randers-Pehrson | 38e6e77 | 2000-04-09 19:06:13 -0500 | [diff] [blame] | 1534 | #define PNG_DESTROY_WILL_FREE_DATA 1 |
| 1535 | #define PNG_SET_WILL_FREE_DATA 1 |
| 1536 | #define PNG_USER_WILL_FREE_DATA 2 |
| 1537 | /* Flags for png_ptr->free_me and info_ptr->free_me */ |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1538 | #define PNG_FREE_HIST 0x0008 |
| 1539 | #define PNG_FREE_ICCP 0x0010 |
| 1540 | #define PNG_FREE_SPLT 0x0020 |
| 1541 | #define PNG_FREE_ROWS 0x0040 |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 1542 | #define PNG_FREE_PCAL 0x0080 |
| 1543 | #define PNG_FREE_SCAL 0x0100 |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1544 | #define PNG_FREE_UNKN 0x0200 |
| 1545 | #define PNG_FREE_LIST 0x0400 |
Glenn Randers-Pehrson | 6942d53 | 2000-05-01 09:31:54 -0500 | [diff] [blame] | 1546 | #define PNG_FREE_PLTE 0x1000 |
| 1547 | #define PNG_FREE_TRNS 0x2000 |
| 1548 | #define PNG_FREE_TEXT 0x4000 |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 1549 | #define PNG_FREE_ALL 0x7fff |
Glenn Randers-Pehrson | ec61c23 | 2000-05-16 06:17:36 -0500 | [diff] [blame] | 1550 | #define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1551 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1552 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1553 | PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_structp png_ptr, |
| 1554 | png_alloc_size_t size), PNG_ALLOCATED); |
| 1555 | PNG_EXPORT(101, void, png_free_default, (png_structp png_ptr, png_voidp ptr)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1556 | #endif |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1557 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 1558 | #ifdef PNG_ERROR_TEXT_SUPPORTED |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1559 | /* Fatal error in PNG image of libpng - can't continue */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1560 | PNG_EXPORTA(102, void, png_error, |
| 1561 | (png_structp png_ptr, png_const_charp error_message), |
| 1562 | PNG_NORETURN); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1563 | |
Glenn Randers-Pehrson | 70e3f54 | 1998-01-03 22:40:55 -0600 | [diff] [blame] | 1564 | /* The same, but the chunk name is prepended to the error string. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1565 | PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr, |
| 1566 | png_const_charp error_message), PNG_NORETURN); |
Glenn Randers-Pehrson | 70e3f54 | 1998-01-03 22:40:55 -0600 | [diff] [blame] | 1567 | |
Glenn Randers-Pehrson | fd10753 | 2009-11-10 05:59:22 -0600 | [diff] [blame] | 1568 | #else |
| 1569 | /* Fatal error in PNG image of libpng - can't continue */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1570 | PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN); |
Glenn Randers-Pehrson | fd10753 | 2009-11-10 05:59:22 -0600 | [diff] [blame] | 1571 | #endif |
| 1572 | |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1573 | /* Non-fatal error in libpng. Can continue, but may have a problem. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1574 | PNG_EXPORT(105, void, png_warning, (png_structp png_ptr, |
| 1575 | png_const_charp warning_message)); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1576 | |
Glenn Randers-Pehrson | 70e3f54 | 1998-01-03 22:40:55 -0600 | [diff] [blame] | 1577 | /* Non-fatal error in libpng, chunk name is prepended to message. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1578 | PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr, |
| 1579 | png_const_charp warning_message)); |
Glenn Randers-Pehrson | 70e3f54 | 1998-01-03 22:40:55 -0600 | [diff] [blame] | 1580 | |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1581 | #ifdef PNG_BENIGN_ERRORS_SUPPORTED |
| 1582 | /* Benign error in libpng. Can continue, but may have a problem. |
| 1583 | * User can choose whether to handle as a fatal error or as a warning. */ |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 1584 | # undef png_benign_error |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1585 | PNG_EXPORT(107, void, png_benign_error, (png_structp png_ptr, |
| 1586 | png_const_charp warning_message)); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1587 | |
| 1588 | /* Same, chunk name is prepended to message. */ |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 1589 | # undef png_chunk_benign_error |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1590 | PNG_EXPORT(108, void, png_chunk_benign_error, (png_structp png_ptr, |
| 1591 | png_const_charp warning_message)); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1592 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1593 | PNG_EXPORT(109, void, png_set_benign_errors, |
| 1594 | (png_structp png_ptr, int allowed)); |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 1595 | #else |
| 1596 | # ifdef PNG_ALLOW_BENIGN_ERRORS |
| 1597 | # define png_benign_error png_warning |
| 1598 | # define png_chunk_benign_error png_chunk_warning |
| 1599 | # else |
| 1600 | # define png_benign_error png_error |
| 1601 | # define png_chunk_benign_error png_chunk_error |
| 1602 | # endif |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1603 | #endif |
| 1604 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1605 | /* The png_set_<chunk> functions are for storing values in the png_info_struct. |
| 1606 | * Similarly, the png_get_<chunk> calls are used to read values from the |
| 1607 | * png_info_struct, either storing the parameters in the passed variables, or |
| 1608 | * setting pointers into the png_info_struct where the data is stored. The |
| 1609 | * png_get_<chunk> functions return a non-zero value if the data was available |
| 1610 | * in info_ptr, or return zero and do not change any of the parameters if the |
| 1611 | * data was not available. |
| 1612 | * |
| 1613 | * These functions should be used instead of directly accessing png_info |
| 1614 | * to avoid problems with future changes in the size and internal layout of |
| 1615 | * png_info_struct. |
| 1616 | */ |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1617 | /* Returns "flag" if chunk data is valid in info_ptr. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1618 | PNG_EXPORT(110, png_uint_32, png_get_valid, |
| 1619 | (png_structp png_ptr, png_infop info_ptr, |
| 1620 | png_uint_32 flag)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1621 | |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1622 | /* Returns number of bytes needed to hold a transformed row. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1623 | PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_structp png_ptr, |
| 1624 | png_infop info_ptr)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1625 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1626 | #ifdef PNG_INFO_IMAGE_SUPPORTED |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1627 | /* Returns row_pointers, which is an array of pointers to scanlines that was |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1628 | * returned from png_read_png(). |
| 1629 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1630 | PNG_EXPORT(112, png_bytepp, png_get_rows, |
| 1631 | (png_structp png_ptr, png_infop info_ptr)); |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1632 | /* Set row_pointers, which is an array of pointers to scanlines for use |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1633 | * by png_write_png(). |
| 1634 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1635 | PNG_EXPORT(113, void, png_set_rows, (png_structp png_ptr, png_infop info_ptr, |
| 1636 | png_bytepp row_pointers)); |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1637 | #endif |
| 1638 | |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1639 | /* Returns number of color channels in image. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1640 | PNG_EXPORT(114, png_byte, png_get_channels, |
| 1641 | (png_structp png_ptr, png_infop info_ptr)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1642 | |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1643 | #ifdef PNG_EASY_ACCESS_SUPPORTED |
| 1644 | /* Returns image width in pixels. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1645 | PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_structp png_ptr, |
| 1646 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1647 | |
| 1648 | /* Returns image height in pixels. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1649 | PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_structp png_ptr, |
| 1650 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1651 | |
| 1652 | /* Returns image bit_depth. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1653 | PNG_EXPORT(117, png_byte, png_get_bit_depth, |
| 1654 | (png_structp png_ptr, png_infop info_ptr)); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1655 | |
| 1656 | /* Returns image color_type. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1657 | PNG_EXPORT(118, png_byte, png_get_color_type, (png_structp png_ptr, |
| 1658 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1659 | |
| 1660 | /* Returns image filter_type. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1661 | PNG_EXPORT(119, png_byte, png_get_filter_type, (png_structp png_ptr, |
| 1662 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1663 | |
| 1664 | /* Returns image interlace_type. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1665 | PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_structp png_ptr, |
| 1666 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1667 | |
| 1668 | /* Returns image compression_type. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1669 | PNG_EXPORT(121, png_byte, png_get_compression_type, (png_structp png_ptr, |
| 1670 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1671 | |
| 1672 | /* Returns image resolution in pixels per meter, from pHYs chunk data. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1673 | PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter, (png_structp png_ptr, |
| 1674 | png_infop info_ptr)); |
| 1675 | PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter, (png_structp png_ptr, |
| 1676 | png_infop info_ptr)); |
| 1677 | PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter, (png_structp png_ptr, |
| 1678 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1679 | |
| 1680 | /* Returns pixel aspect ratio, computed from pHYs chunk data. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1681 | PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio, (png_structp png_ptr, |
| 1682 | png_infop info_ptr)); |
| 1683 | PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed, |
| 1684 | (png_structp png_ptr, png_infop info_ptr)); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1685 | |
| 1686 | /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1687 | PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels, (png_structp png_ptr, |
| 1688 | png_infop info_ptr)); |
| 1689 | PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels, (png_structp png_ptr, |
| 1690 | png_infop info_ptr)); |
| 1691 | PNG_EXPORT(128, png_int_32, png_get_x_offset_microns, (png_structp png_ptr, |
| 1692 | png_infop info_ptr)); |
| 1693 | PNG_EXPORT(129, png_int_32, png_get_y_offset_microns, (png_structp png_ptr, |
| 1694 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1695 | |
| 1696 | #endif /* PNG_EASY_ACCESS_SUPPORTED */ |
| 1697 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1698 | /* Returns pointer to signature string read from PNG header */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1699 | PNG_EXPORT(130, png_const_bytep, png_get_signature, (png_structp png_ptr, |
| 1700 | png_infop info_ptr)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1701 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1702 | #ifdef PNG_bKGD_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1703 | PNG_EXPORT(131, png_uint_32, png_get_bKGD, |
| 1704 | (png_structp png_ptr, png_infop info_ptr, |
| 1705 | png_color_16p *background)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1706 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1707 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1708 | #ifdef PNG_bKGD_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1709 | PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr, |
| 1710 | png_const_color_16p background)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1711 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1712 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1713 | #ifdef PNG_cHRM_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1714 | PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_structp png_ptr, |
| 1715 | png_infop info_ptr, double *white_x, double *white_y, double *red_x, |
| 1716 | double *red_y, double *green_x, double *green_y, double *blue_x, |
| 1717 | double *blue_y)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1718 | #ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1719 | PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed, (png_structp png_ptr, |
| 1720 | png_infop info_ptr, png_fixed_point *int_white_x, |
| 1721 | png_fixed_point *int_white_y, png_fixed_point *int_red_x, |
| 1722 | png_fixed_point *int_red_y, png_fixed_point *int_green_x, |
| 1723 | png_fixed_point *int_green_y, png_fixed_point *int_blue_x, |
| 1724 | png_fixed_point *int_blue_y)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1725 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1726 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1727 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1728 | #ifdef PNG_cHRM_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1729 | PNG_FP_EXPORT(135, void, png_set_cHRM, |
| 1730 | (png_structp png_ptr, png_infop info_ptr, |
| 1731 | double white_x, double white_y, double red_x, double red_y, double green_x, |
| 1732 | double green_y, double blue_x, double blue_y)); |
| 1733 | PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr, |
| 1734 | png_infop info_ptr, png_fixed_point int_white_x, |
| 1735 | png_fixed_point int_white_y, png_fixed_point int_red_x, |
| 1736 | png_fixed_point int_red_y, png_fixed_point int_green_x, |
| 1737 | png_fixed_point int_green_y, png_fixed_point int_blue_x, |
| 1738 | png_fixed_point int_blue_y)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1739 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1740 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1741 | #ifdef PNG_gAMA_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1742 | PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, |
| 1743 | (png_structp png_ptr, png_infop info_ptr, |
| 1744 | double *file_gamma)); |
| 1745 | PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed, (png_structp png_ptr, |
| 1746 | png_infop info_ptr, png_fixed_point *int_file_gamma)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1747 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1748 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1749 | #ifdef PNG_gAMA_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1750 | PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr, png_infop info_ptr, |
| 1751 | double file_gamma)); |
| 1752 | PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr, |
| 1753 | png_infop info_ptr, png_fixed_point int_file_gamma)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1754 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1755 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1756 | #ifdef PNG_hIST_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1757 | PNG_EXPORT(141, png_uint_32, png_get_hIST, |
| 1758 | (png_structp png_ptr, png_infop info_ptr, |
| 1759 | png_uint_16p *hist)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1760 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1761 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1762 | #ifdef PNG_hIST_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1763 | PNG_EXPORT(142, void, png_set_hIST, (png_structp png_ptr, png_infop info_ptr, |
| 1764 | png_const_uint_16p hist)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1765 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1766 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1767 | PNG_EXPORT(143, png_uint_32, png_get_IHDR, |
| 1768 | (png_structp png_ptr, png_infop info_ptr, |
| 1769 | png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, |
| 1770 | int *interlace_method, int *compression_method, int *filter_method)); |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 1771 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1772 | PNG_EXPORT(144, void, png_set_IHDR, |
| 1773 | (png_structp png_ptr, png_infop info_ptr, |
| 1774 | png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, |
| 1775 | int interlace_method, int compression_method, int filter_method)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1776 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1777 | #ifdef PNG_oFFs_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1778 | PNG_EXPORT(145, png_uint_32, png_get_oFFs, |
| 1779 | (png_structp png_ptr, png_infop info_ptr, |
| 1780 | png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1781 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1782 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1783 | #ifdef PNG_oFFs_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1784 | PNG_EXPORT(146, void, png_set_oFFs, |
| 1785 | (png_structp png_ptr, png_infop info_ptr, |
| 1786 | png_int_32 offset_x, png_int_32 offset_y, int unit_type)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1787 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1788 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1789 | #ifdef PNG_pCAL_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1790 | PNG_EXPORT(147, png_uint_32, png_get_pCAL, |
| 1791 | (png_structp png_ptr, png_infop info_ptr, |
| 1792 | png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, |
| 1793 | int *nparams, |
| 1794 | png_charp *units, png_charpp *params)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1795 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1796 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1797 | #ifdef PNG_pCAL_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1798 | PNG_EXPORT(148, void, png_set_pCAL, (png_structp png_ptr, png_infop info_ptr, |
| 1799 | png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, |
| 1800 | int nparams, png_const_charp units, png_charpp params)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1801 | #endif |
| 1802 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1803 | #ifdef PNG_pHYs_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1804 | PNG_EXPORT(149, png_uint_32, png_get_pHYs, |
| 1805 | (png_structp png_ptr, png_infop info_ptr, |
| 1806 | png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1807 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1808 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1809 | #ifdef PNG_pHYs_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1810 | PNG_EXPORT(150, void, png_set_pHYs, |
| 1811 | (png_structp png_ptr, png_infop info_ptr, |
| 1812 | png_uint_32 res_x, png_uint_32 res_y, int unit_type)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1813 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1814 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1815 | PNG_EXPORT(151, png_uint_32, png_get_PLTE, |
| 1816 | (png_structp png_ptr, png_infop info_ptr, |
| 1817 | png_colorp *palette, int *num_palette)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1818 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1819 | PNG_EXPORT(152, void, png_set_PLTE, |
| 1820 | (png_structp png_ptr, png_infop info_ptr, |
| 1821 | png_const_colorp palette, int num_palette)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1822 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1823 | #ifdef PNG_sBIT_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1824 | PNG_EXPORT(153, png_uint_32, png_get_sBIT, |
| 1825 | (png_structp png_ptr, png_infop info_ptr, |
| 1826 | png_color_8p *sig_bit)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1827 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1828 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1829 | #ifdef PNG_sBIT_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1830 | PNG_EXPORT(154, void, png_set_sBIT, |
| 1831 | (png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1832 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1833 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1834 | #ifdef PNG_sRGB_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1835 | PNG_EXPORT(155, png_uint_32, png_get_sRGB, |
| 1836 | (png_structp png_ptr, png_infop info_ptr, int *intent)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1837 | #endif |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 1838 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1839 | #ifdef PNG_sRGB_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1840 | PNG_EXPORT(156, void, png_set_sRGB, |
| 1841 | (png_structp png_ptr, png_infop info_ptr, int intent)); |
| 1842 | PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_structp png_ptr, |
| 1843 | png_infop info_ptr, int intent)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1844 | #endif |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 1845 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1846 | #ifdef PNG_iCCP_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1847 | PNG_EXPORT(158, png_uint_32, png_get_iCCP, |
| 1848 | (png_structp png_ptr, png_infop info_ptr, |
| 1849 | png_charpp name, int *compression_type, png_bytepp profile, |
| 1850 | png_uint_32 *proflen)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1851 | #endif |
| 1852 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1853 | #ifdef PNG_iCCP_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1854 | PNG_EXPORT(159, void, png_set_iCCP, |
| 1855 | (png_structp png_ptr, png_infop info_ptr, |
| 1856 | png_const_charp name, int compression_type, png_const_bytep profile, |
| 1857 | png_uint_32 proflen)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1858 | #endif |
| 1859 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1860 | #ifdef PNG_sPLT_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1861 | PNG_EXPORT(160, png_uint_32, png_get_sPLT, |
| 1862 | (png_structp png_ptr, png_infop info_ptr, |
| 1863 | png_sPLT_tpp entries)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1864 | #endif |
| 1865 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1866 | #ifdef PNG_sPLT_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1867 | PNG_EXPORT(161, void, png_set_sPLT, |
| 1868 | (png_structp png_ptr, png_infop info_ptr, |
| 1869 | png_const_sPLT_tp entries, int nentries)); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1870 | #endif |
| 1871 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1872 | #ifdef PNG_TEXT_SUPPORTED |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1873 | /* png_get_text also returns the number of text chunks in *num_text */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1874 | PNG_EXPORT(162, png_uint_32, png_get_text, |
| 1875 | (png_structp png_ptr, png_infop info_ptr, |
| 1876 | png_textp *text_ptr, int *num_text)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1877 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1878 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1879 | /* Note while png_set_text() will accept a structure whose text, |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1880 | * language, and translated keywords are NULL pointers, the structure |
| 1881 | * returned by png_get_text will always contain regular |
| 1882 | * zero-terminated C strings. They might be empty strings but |
| 1883 | * they will never be NULL pointers. |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 1884 | */ |
| 1885 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1886 | #ifdef PNG_TEXT_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1887 | PNG_EXPORT(163, void, png_set_text, |
| 1888 | (png_structp png_ptr, png_infop info_ptr, |
| 1889 | png_const_textp text_ptr, int num_text)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1890 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1891 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1892 | #ifdef PNG_tIME_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1893 | PNG_EXPORT(164, png_uint_32, png_get_tIME, |
| 1894 | (png_structp png_ptr, png_infop info_ptr, png_timep *mod_time)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1895 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1896 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1897 | #ifdef PNG_tIME_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1898 | PNG_EXPORT(165, void, png_set_tIME, |
| 1899 | (png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1900 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1901 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1902 | #ifdef PNG_tRNS_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1903 | PNG_EXPORT(166, png_uint_32, png_get_tRNS, |
| 1904 | (png_structp png_ptr, png_infop info_ptr, |
| 1905 | png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1906 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1907 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1908 | #ifdef PNG_tRNS_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1909 | PNG_EXPORT(167, void, png_set_tRNS, |
| 1910 | (png_structp png_ptr, png_infop info_ptr, |
| 1911 | png_const_bytep trans_alpha, int num_trans, |
| 1912 | png_const_color_16p trans_color)); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1913 | #endif |
| 1914 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1915 | #ifdef PNG_sCAL_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1916 | PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, |
| 1917 | (png_structp png_ptr, png_infop info_ptr, |
| 1918 | int *unit, double *width, double *height)); |
Glenn Randers-Pehrson | 48dc6eb | 2010-07-31 07:09:58 -0500 | [diff] [blame] | 1919 | #ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1920 | /* NOTE: this API is currently implemented using floating point arithmetic, |
Glenn Randers-Pehrson | 48dc6eb | 2010-07-31 07:09:58 -0500 | [diff] [blame] | 1921 | * consequently it can only be used on systems with floating point support. |
| 1922 | * In any case the range of values supported by png_fixed_point is small and it |
| 1923 | * is highly recommended that png_get_sCAL_s be used instead. |
| 1924 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1925 | PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed, (png_structp png_ptr, |
| 1926 | png_infop info_ptr, int *unit, png_fixed_point *width, |
| 1927 | png_fixed_point *height)); |
Glenn Randers-Pehrson | 48dc6eb | 2010-07-31 07:09:58 -0500 | [diff] [blame] | 1928 | #endif |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1929 | PNG_EXPORT(169, png_uint_32, png_get_sCAL_s, |
| 1930 | (png_structp png_ptr, |
| 1931 | png_infop info_ptr, int *unit, png_charpp swidth, png_charpp sheight)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1932 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1933 | PNG_FP_EXPORT(170, void, png_set_sCAL, |
| 1934 | (png_structp png_ptr, png_infop info_ptr, |
| 1935 | int unit, double width, double height)); |
| 1936 | PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr, |
| 1937 | png_infop info_ptr, int unit, png_fixed_point width, |
| 1938 | png_fixed_point height)); |
| 1939 | PNG_EXPORT(171, void, png_set_sCAL_s, |
| 1940 | (png_structp png_ptr, png_infop info_ptr, |
| 1941 | int unit, png_const_charp swidth, png_const_charp sheight)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1942 | #endif /* PNG_sCAL_SUPPORTED */ |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1943 | |
Glenn Randers-Pehrson | 7824a70 | 2009-06-13 10:05:05 -0500 | [diff] [blame] | 1944 | #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED |
| 1945 | /* Provide a list of chunks and how they are to be handled, if the built-in |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1946 | handling or default unknown chunk handling is not desired. Any chunks not |
| 1947 | listed will be handled in the default manner. The IHDR and IEND chunks |
| 1948 | must not be listed. |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 1949 | keep = 0: follow default behaviour |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1950 | = 1: do not keep |
| 1951 | = 2: keep only if safe-to-copy |
| 1952 | = 3: keep even if unsafe-to-copy |
| 1953 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1954 | PNG_EXPORT(172, void, png_set_keep_unknown_chunks, |
| 1955 | (png_structp png_ptr, int keep, |
| 1956 | png_const_bytep chunk_list, int num_chunks)); |
| 1957 | PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr, |
| 1958 | png_const_bytep chunk_name)); |
Glenn Randers-Pehrson | 7824a70 | 2009-06-13 10:05:05 -0500 | [diff] [blame] | 1959 | #endif |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1960 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1961 | PNG_EXPORT(174, void, png_set_unknown_chunks, (png_structp png_ptr, |
| 1962 | png_infop info_ptr, png_const_unknown_chunkp unknowns, int num_unknowns)); |
| 1963 | PNG_EXPORT(175, void, png_set_unknown_chunk_location, (png_structp png_ptr, |
| 1964 | png_infop info_ptr, int chunk, int location)); |
| 1965 | PNG_EXPORT(176, int, png_get_unknown_chunks, (png_structp png_ptr, |
| 1966 | png_infop info_ptr, png_unknown_chunkpp entries)); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1967 | #endif |
| 1968 | |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1969 | /* Png_free_data() will turn off the "valid" flag for anything it frees. |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1970 | * If you need to turn it off for a chunk that your application has freed, |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1971 | * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); |
| 1972 | */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1973 | PNG_EXPORT(177, void, png_set_invalid, |
| 1974 | (png_structp png_ptr, png_infop info_ptr, int mask)); |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1975 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1976 | #ifdef PNG_INFO_IMAGE_SUPPORTED |
Glenn Randers-Pehrson | 6942d53 | 2000-05-01 09:31:54 -0500 | [diff] [blame] | 1977 | /* The "params" pointer is currently not used and is for future expansion. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1978 | PNG_EXPORT(178, void, png_read_png, (png_structp png_ptr, png_infop info_ptr, |
| 1979 | int transforms, png_voidp params)); |
| 1980 | PNG_EXPORT(179, void, png_write_png, (png_structp png_ptr, png_infop info_ptr, |
| 1981 | int transforms, png_voidp params)); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1982 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1983 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1984 | PNG_EXPORT(180, png_const_charp, png_get_copyright, (png_structp png_ptr)); |
| 1985 | PNG_EXPORT(181, png_const_charp, png_get_header_ver, (png_structp png_ptr)); |
| 1986 | PNG_EXPORT(182, png_const_charp, png_get_header_version, (png_structp png_ptr)); |
| 1987 | PNG_EXPORT(183, png_const_charp, png_get_libpng_ver, (png_structp png_ptr)); |
Glenn Randers-Pehrson | c944229 | 1999-01-06 21:50:16 -0600 | [diff] [blame] | 1988 | |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 1989 | #ifdef PNG_MNG_FEATURES_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 1990 | PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr, |
| 1991 | png_uint_32 mng_features_permitted)); |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 1992 | #endif |
| 1993 | |
Glenn Randers-Pehrson | 8f3dd83 | 2004-08-10 09:43:42 -0500 | [diff] [blame] | 1994 | /* For use in png_set_keep_unknown, added to version 1.2.6 */ |
| 1995 | #define PNG_HANDLE_CHUNK_AS_DEFAULT 0 |
| 1996 | #define PNG_HANDLE_CHUNK_NEVER 1 |
| 1997 | #define PNG_HANDLE_CHUNK_IF_SAFE 2 |
| 1998 | #define PNG_HANDLE_CHUNK_ALWAYS 3 |
| 1999 | |
Glenn Randers-Pehrson | e68f5a3 | 2001-05-14 09:20:53 -0500 | [diff] [blame] | 2000 | /* Strip the prepended error numbers ("#nnn ") from error and warning |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 2001 | * messages before passing them to the error or warning handler. |
| 2002 | */ |
Glenn Randers-Pehrson | e68f5a3 | 2001-05-14 09:20:53 -0500 | [diff] [blame] | 2003 | #ifdef PNG_ERROR_NUMBERS_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2004 | PNG_EXPORT(185, void, png_set_strip_error_numbers, |
| 2005 | (png_structp png_ptr, |
| 2006 | png_uint_32 strip_mode)); |
Glenn Randers-Pehrson | be9de0f | 2001-01-22 08:52:16 -0600 | [diff] [blame] | 2007 | #endif |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 2008 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 2009 | /* Added in libpng-1.2.6 */ |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 2010 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2011 | PNG_EXPORT(186, void, png_set_user_limits, (png_structp png_ptr, |
| 2012 | png_uint_32 user_width_max, png_uint_32 user_height_max)); |
| 2013 | PNG_EXPORT(187, png_uint_32, png_get_user_width_max, (png_structp png_ptr)); |
| 2014 | PNG_EXPORT(188, png_uint_32, png_get_user_height_max, (png_structp png_ptr)); |
Glenn Randers-Pehrson | 800d1e9 | 2008-08-20 17:25:21 -0500 | [diff] [blame] | 2015 | /* Added in libpng-1.4.0 */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2016 | PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structp png_ptr, |
| 2017 | png_uint_32 user_chunk_cache_max)); |
| 2018 | PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max, (png_structp png_ptr)); |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 2019 | /* Added in libpng-1.4.1 */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2020 | PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structp png_ptr, |
| 2021 | png_alloc_size_t user_chunk_cache_max)); |
| 2022 | PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max, |
| 2023 | (png_structp png_ptr)); |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 2024 | #endif |
| 2025 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 2026 | #if defined(PNG_INCH_CONVERSIONS_SUPPORTED) |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2027 | PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch, (png_structp png_ptr, |
| 2028 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 2029 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2030 | PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch, (png_structp png_ptr, |
| 2031 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 2032 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2033 | PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch, (png_structp png_ptr, |
| 2034 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 2035 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2036 | PNG_FP_EXPORT(196, float, png_get_x_offset_inches, (png_structp png_ptr, |
| 2037 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 2038 | #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2039 | PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed, |
| 2040 | (png_structp png_ptr, png_infop info_ptr)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 2041 | #endif |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 2042 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2043 | PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_structp png_ptr, |
| 2044 | png_infop info_ptr)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 2045 | #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2046 | PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed, |
| 2047 | (png_structp png_ptr, png_infop info_ptr)); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 2048 | #endif |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 2049 | |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 2050 | # ifdef PNG_pHYs_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2051 | PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_structp png_ptr, |
| 2052 | png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, |
| 2053 | int *unit_type)); |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 2054 | # endif /* PNG_pHYs_SUPPORTED */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 2055 | #endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 2056 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 2057 | /* Added in libpng-1.4.0 */ |
| 2058 | #ifdef PNG_IO_STATE_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2059 | PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_structp png_ptr)); |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 2060 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2061 | PNG_EXPORT(200, png_const_bytep, png_get_io_chunk_name, (png_structp png_ptr)); |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 2062 | |
| 2063 | /* The flags returned by png_get_io_state() are the following: */ |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 2064 | # define PNG_IO_NONE 0x0000 /* no I/O at this moment */ |
| 2065 | # define PNG_IO_READING 0x0001 /* currently reading */ |
| 2066 | # define PNG_IO_WRITING 0x0002 /* currently writing */ |
| 2067 | # define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */ |
| 2068 | # define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */ |
| 2069 | # define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */ |
| 2070 | # define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */ |
| 2071 | # define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */ |
| 2072 | # define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */ |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 2073 | #endif /* ?PNG_IO_STATE_SUPPORTED */ |
| 2074 | |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 2075 | #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED |
Glenn Randers-Pehrson | 8686fff | 1998-05-21 09:27:50 -0500 | [diff] [blame] | 2076 | /* With these routines we avoid an integer divide, which will be slower on |
| 2077 | * most machines. However, it does take more operations than the corresponding |
| 2078 | * divide method, so it may be slower on a few RISC systems. There are two |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 2079 | * shifts (by 8 or 16 bits) and an addition, versus a single integer divide. |
| 2080 | * |
| 2081 | * Note that the rounding factors are NOT supposed to be the same! 128 and |
| 2082 | * 32768 are correct for the NODIV code; 127 and 32767 are correct for the |
| 2083 | * standard method. |
| 2084 | * |
| 2085 | * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ] |
| 2086 | */ |
| 2087 | |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 2088 | /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 2089 | |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 2090 | # define png_composite(composite, fg, alpha, bg) \ |
| 2091 | { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \ |
| 2092 | * (png_uint_16)(alpha) \ |
| 2093 | + (png_uint_16)(bg)*(png_uint_16)(255 \ |
| 2094 | - (png_uint_16)(alpha)) + (png_uint_16)128); \ |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 2095 | (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 2096 | |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 2097 | # define png_composite_16(composite, fg, alpha, bg) \ |
| 2098 | { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \ |
| 2099 | * (png_uint_32)(alpha) \ |
| 2100 | + (png_uint_32)(bg)*(png_uint_32)(65535L \ |
| 2101 | - (png_uint_32)(alpha)) + (png_uint_32)32768L); \ |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 2102 | (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } |
| 2103 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 2104 | #else /* Standard method using integer division */ |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 2105 | |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 2106 | # define png_composite(composite, fg, alpha, bg) \ |
| 2107 | (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 2108 | (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ |
| 2109 | (png_uint_16)127) / 255) |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 2110 | |
| 2111 | # define png_composite_16(composite, fg, alpha, bg) \ |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 2112 | (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 2113 | (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \ |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 2114 | (png_uint_32)32767) / (png_uint_32)65535L) |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 2115 | #endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ |
| 2116 | |
Glenn Randers-Pehrson | eb58091 | 2008-07-30 14:47:09 -0500 | [diff] [blame] | 2117 | #ifdef PNG_USE_READ_MACROS |
| 2118 | /* Inline macros to do direct reads of bytes from the input buffer. |
| 2119 | * The png_get_int_32() routine assumes we are using two's complement |
| 2120 | * format for negative values, which is almost certainly true. |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 2121 | */ |
Glenn Randers-Pehrson | eb58091 | 2008-07-30 14:47:09 -0500 | [diff] [blame] | 2122 | # define png_get_uint_32(buf) \ |
| 2123 | (((png_uint_32)(*(buf)) << 24) + \ |
| 2124 | ((png_uint_32)(*((buf) + 1)) << 16) + \ |
| 2125 | ((png_uint_32)(*((buf) + 2)) << 8) + \ |
| 2126 | ((png_uint_32)(*((buf) + 3)))) |
Glenn Randers-Pehrson | b93e032 | 2010-11-25 06:56:20 -0600 | [diff] [blame] | 2127 | |
| 2128 | /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the |
| 2129 | * function) incorrectly returned a value of type png_uint_32. |
| 2130 | */ |
Glenn Randers-Pehrson | eb58091 | 2008-07-30 14:47:09 -0500 | [diff] [blame] | 2131 | # define png_get_uint_16(buf) \ |
Glenn Randers-Pehrson | a581556 | 2010-11-20 21:48:29 -0600 | [diff] [blame] | 2132 | ((png_uint_16) \ |
| 2133 | (((unsigned int)(*(buf)) << 8) + \ |
| 2134 | ((unsigned int)(*((buf) + 1))))) |
Glenn Randers-Pehrson | b93e032 | 2010-11-25 06:56:20 -0600 | [diff] [blame] | 2135 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 2136 | # define png_get_int_32(buf) \ |
| 2137 | ((png_int_32)((*(buf) & 0x80) \ |
Glenn Randers-Pehrson | a581556 | 2010-11-20 21:48:29 -0600 | [diff] [blame] | 2138 | ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \ |
Glenn Randers-Pehrson | dd80757 | 2010-07-30 14:35:50 -0500 | [diff] [blame] | 2139 | : (png_int_32)png_get_uint_32(buf))) |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 2140 | #endif |
Glenn Randers-Pehrson | c3d73f4 | 2010-04-24 09:18:57 -0500 | [diff] [blame] | 2141 | |
| 2142 | #ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2143 | PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf)); |
| 2144 | PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf)); |
| 2145 | PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf)); |
Glenn Randers-Pehrson | c3d73f4 | 2010-04-24 09:18:57 -0500 | [diff] [blame] | 2146 | #endif |
| 2147 | |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2148 | PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_structp png_ptr, |
| 2149 | png_const_bytep buf)); |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 2150 | /* No png_get_int_16 -- may be added if there's a real need for it. */ |
| 2151 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 2152 | /* Place a 32-bit number into a buffer in PNG byte order (big-endian). */ |
Glenn Randers-Pehrson | c3d73f4 | 2010-04-24 09:18:57 -0500 | [diff] [blame] | 2153 | #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2154 | PNG_EXPORT(205, void, png_save_uint_32, (png_bytep buf, png_uint_32 i)); |
Glenn Randers-Pehrson | c3d73f4 | 2010-04-24 09:18:57 -0500 | [diff] [blame] | 2155 | #endif |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 2156 | #ifdef PNG_SAVE_INT_32_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2157 | PNG_EXPORT(206, void, png_save_int_32, (png_bytep buf, png_int_32 i)); |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 2158 | #endif |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 2159 | |
| 2160 | /* Place a 16-bit number into a buffer in PNG byte order. |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2161 | * The parameter is declared unsigned int, not png_uint_16, |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 2162 | * just to avoid potential problems on pre-ANSI C compilers. |
| 2163 | */ |
Glenn Randers-Pehrson | c3d73f4 | 2010-04-24 09:18:57 -0500 | [diff] [blame] | 2164 | #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED |
Glenn Randers-Pehrson | 23d3970 | 2010-12-06 18:28:02 -0600 | [diff] [blame] | 2165 | PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i)); |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 2166 | /* No png_save_int_16 -- may be added if there's a real need for it. */ |
Glenn Randers-Pehrson | c3d73f4 | 2010-04-24 09:18:57 -0500 | [diff] [blame] | 2167 | #endif |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 2168 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 2169 | /* Maintainer: Put new public prototypes here ^, in libpng.3, and project |
| 2170 | * defs |
| 2171 | */ |
| 2172 | |
Glenn Randers-Pehrson | 9f044c1 | 2010-12-07 14:59:43 -0600 | [diff] [blame^] | 2173 | /* The last ordinal number (this is the *last* one already used; the next |
| 2174 | * one to use is one more than this.) |
Glenn Randers-Pehrson | c551c0d | 2010-03-16 07:52:34 -0500 | [diff] [blame] | 2175 | */ |
| 2176 | #ifdef PNG_EXPORT_LAST_ORDINAL |
Glenn Randers-Pehrson | 2be8b64 | 2010-07-29 19:09:18 -0500 | [diff] [blame] | 2177 | PNG_EXPORT_LAST_ORDINAL(218); |
Glenn Randers-Pehrson | c551c0d | 2010-03-16 07:52:34 -0500 | [diff] [blame] | 2178 | #endif |
| 2179 | |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 2180 | #ifdef __cplusplus |
| 2181 | } |
| 2182 | #endif |
| 2183 | |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 2184 | #endif /* PNG_VERSION_INFO_ONLY */ |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 2185 | /* Do not put anything past this line */ |
Glenn Randers-Pehrson | 1394480 | 2000-06-24 07:42:42 -0500 | [diff] [blame] | 2186 | #endif /* PNG_H */ |