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 | 33d8c2a | 2010-07-30 14:50:04 -0500 | [diff] [blame] | 4 | * libpng version 1.5.0beta38 - July 30, 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 | 33d8c2a | 2010-07-30 14:50:04 -0500 | [diff] [blame] | 14 | * libpng versions 0.97, January 1998, through 1.5.0beta38 - July 30, 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 | 33d8c2a | 2010-07-30 14:50:04 -0500 | [diff] [blame] | 143 | * 1.5.0beta01-38 15 10500 15.so.15.0[.0] |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 144 | * |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 145 | * Henceforth the source version will match the shared-library major |
| 146 | * and minor numbers; the shared-library major version number will be |
| 147 | * used for changes in backward compatibility, as it is intended. The |
| 148 | * PNG_LIBPNG_VER macro, which is not used within libpng but is available |
| 149 | * for applications, is an unsigned integer of the form xyyzz corresponding |
| 150 | * to the source version x.y.z (leading zeros in y and z). Beta versions |
| 151 | * were given the previous public release number plus a letter, until |
| 152 | * version 1.0.6j; from then on they were given the upcoming public |
| 153 | * release number plus "betaNN" or "rcN". |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 154 | * |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 155 | * Binary incompatibility exists only when applications make direct access |
| 156 | * to the info_ptr or png_ptr members through png.h, and the compiled |
| 157 | * application is loaded with a different version of the library. |
Glenn Randers-Pehrson | 326320e | 2000-04-24 07:43:17 -0500 | [diff] [blame] | 158 | * |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 159 | * DLLNUM will change each time there are forward or backward changes |
| 160 | * in binary compatibility (e.g., when a new feature is added). |
Glenn Randers-Pehrson | be9de0f | 2001-01-22 08:52:16 -0600 | [diff] [blame] | 161 | * |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 162 | * See libpng.txt or libpng.3 for more information. The PNG specification |
Glenn Randers-Pehrson | a4981d4 | 2004-08-25 22:00:45 -0500 | [diff] [blame] | 163 | * is available as a W3C Recommendation and as an ISO Specification, |
| 164 | * <http://www.w3.org/TR/2003/REC-PNG-20031110/ |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 165 | */ |
| 166 | |
| 167 | /* |
Glenn Randers-Pehrson | 68ea243 | 2000-04-01 21:10:05 -0600 | [diff] [blame] | 168 | * COPYRIGHT NOTICE, DISCLAIMER, and LICENSE: |
| 169 | * |
Glenn Randers-Pehrson | d436672 | 2000-06-04 14:29:29 -0500 | [diff] [blame] | 170 | * If you modify libpng you may insert additional notices immediately following |
| 171 | * this sentence. |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 172 | * |
Glenn Randers-Pehrson | bfbf865 | 2009-06-26 21:46:52 -0500 | [diff] [blame] | 173 | * This code is released under the libpng license. |
| 174 | * |
Glenn Randers-Pehrson | 33d8c2a | 2010-07-30 14:50:04 -0500 | [diff] [blame] | 175 | * libpng versions 1.2.6, August 15, 2004, through 1.5.0beta38, July 30, 2010, are |
Glenn Randers-Pehrson | e69b55d | 2010-01-01 10:29:06 -0600 | [diff] [blame] | 176 | * Copyright (c) 2004, 2006-2010 Glenn Randers-Pehrson, and are |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 177 | * 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] | 178 | * with the following individual added to the list of Contributing Authors: |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 179 | * |
| 180 | * Cosmin Truta |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 181 | * |
Glenn Randers-Pehrson | a4981d4 | 2004-08-25 22:00:45 -0500 | [diff] [blame] | 182 | * 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] | 183 | * Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are |
Glenn Randers-Pehrson | 32fc5ce | 2000-07-24 06:34:14 -0500 | [diff] [blame] | 184 | * 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] | 185 | * with the following individuals added to the list of Contributing Authors: |
Glenn Randers-Pehrson | d436672 | 2000-06-04 14:29:29 -0500 | [diff] [blame] | 186 | * |
| 187 | * Simon-Pierre Cadieux |
| 188 | * Eric S. Raymond |
| 189 | * Gilles Vollant |
| 190 | * |
Glenn Randers-Pehrson | 3d5a520 | 2000-07-01 15:37:28 -0500 | [diff] [blame] | 191 | * and with the following additions to the disclaimer: |
| 192 | * |
| 193 | * There is no warranty against interference with your enjoyment of the |
| 194 | * library or against infringement. There is no warranty that our |
| 195 | * efforts or the library will fulfill any of your particular purposes |
| 196 | * or needs. This library is provided with all faults, and the entire |
| 197 | * risk of satisfactory quality, performance, accuracy, and effort is with |
| 198 | * the user. |
| 199 | * |
| 200 | * 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] | 201 | * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson, and are |
| 202 | * 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] | 203 | * with the following individuals added to the list of Contributing Authors: |
| 204 | * |
| 205 | * Tom Lane |
| 206 | * Glenn Randers-Pehrson |
| 207 | * Willem van Schaik |
| 208 | * |
| 209 | * 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] | 210 | * Copyright (c) 1996, 1997 Andreas Dilger |
Glenn Randers-Pehrson | d436672 | 2000-06-04 14:29:29 -0500 | [diff] [blame] | 211 | * Distributed according to the same disclaimer and license as libpng-0.88, |
| 212 | * with the following individuals added to the list of Contributing Authors: |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 213 | * |
| 214 | * John Bowler |
| 215 | * Kevin Bracey |
| 216 | * Sam Bushell |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 217 | * Magnus Holmgren |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 218 | * Greg Roelofs |
Glenn Randers-Pehrson | d436672 | 2000-06-04 14:29:29 -0500 | [diff] [blame] | 219 | * Tom Tanner |
| 220 | * |
| 221 | * libpng versions 0.5, May 1995, through 0.88, January 1996, are |
| 222 | * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. |
| 223 | * |
| 224 | * For the purposes of this copyright and license, "Contributing Authors" |
| 225 | * is defined as the following set of individuals: |
| 226 | * |
| 227 | * Andreas Dilger |
| 228 | * Dave Martindale |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 229 | * Guy Eric Schalnat |
| 230 | * Paul Schmidt |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 231 | * Tim Wegner |
| 232 | * |
| 233 | * The PNG Reference Library is supplied "AS IS". The Contributing Authors |
| 234 | * and Group 42, Inc. disclaim all warranties, expressed or implied, |
| 235 | * including, without limitation, the warranties of merchantability and of |
| 236 | * fitness for any purpose. The Contributing Authors and Group 42, Inc. |
| 237 | * assume no liability for direct, indirect, incidental, special, exemplary, |
| 238 | * or consequential damages, which may result from the use of the PNG |
| 239 | * Reference Library, even if advised of the possibility of such damage. |
| 240 | * |
| 241 | * Permission is hereby granted to use, copy, modify, and distribute this |
| 242 | * source code, or portions hereof, for any purpose, without fee, subject |
| 243 | * to the following restrictions: |
| 244 | * |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 245 | * 1. The origin of this source code must not be misrepresented. |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 246 | * |
Glenn Randers-Pehrson | 53c07f5 | 2010-06-18 18:55:55 -0500 | [diff] [blame] | 247 | * 2. Altered versions must be plainly marked as such and must not |
| 248 | * be misrepresented as being the original source. |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 249 | * |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 250 | * 3. This Copyright notice may not be removed or altered from |
| 251 | * any source or altered source distribution. |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 252 | * |
| 253 | * The Contributing Authors and Group 42, Inc. specifically permit, without |
| 254 | * fee, and encourage the use of this source code as a component to |
| 255 | * supporting the PNG file format in commercial products. If you use this |
| 256 | * source code in a product, acknowledgment is not required but would be |
| 257 | * appreciated. |
| 258 | */ |
| 259 | |
| 260 | /* |
| 261 | * A "png_get_copyright" function is available, for convenient use in "about" |
| 262 | * boxes and the like: |
| 263 | * |
Glenn Randers-Pehrson | e0784c7 | 2008-08-09 07:11:44 -0500 | [diff] [blame] | 264 | * printf("%s",png_get_copyright(NULL)); |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 265 | * |
| 266 | * 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] | 267 | * files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31). |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 268 | */ |
| 269 | |
| 270 | /* |
| 271 | * Libpng is OSI Certified Open Source Software. OSI Certified is a |
| 272 | * certification mark of the Open Source Initiative. |
| 273 | */ |
| 274 | |
| 275 | /* |
| 276 | * The contributing authors would like to thank all those who helped |
| 277 | * with testing, bug fixes, and patience. This wouldn't have been |
| 278 | * possible without all of you. |
| 279 | * |
| 280 | * Thanks to Frank J. T. Wojcik for helping with the documentation. |
| 281 | */ |
| 282 | |
| 283 | /* |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 284 | * Y2K compliance in libpng: |
| 285 | * ========================= |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 286 | * |
Glenn Randers-Pehrson | 2be8b64 | 2010-07-29 19:09:18 -0500 | [diff] [blame] | 287 | * July 30, 2010 |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 288 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 289 | * Since the PNG Development group is an ad-hoc body, we can't make |
| 290 | * an official declaration. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 291 | * |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 292 | * This is your unofficial assurance that libpng from version 0.71 and |
Glenn Randers-Pehrson | 33d8c2a | 2010-07-30 14:50:04 -0500 | [diff] [blame] | 293 | * upward through 1.5.0beta38 are Y2K compliant. It is my belief that |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 294 | * earlier versions were also Y2K compliant. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 295 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 296 | * Libpng only has three year fields. One is a 2-byte unsigned integer |
| 297 | * that will hold years up to 65535. The other two hold the date in text |
| 298 | * format, and will hold years up to 9999. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 299 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 300 | * The integer is |
| 301 | * "png_uint_16 year" in png_time_struct. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 302 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 303 | * The strings are |
| 304 | * "png_charp time_buffer" in png_struct and |
| 305 | * "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] | 306 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 307 | * There are seven time-related functions: |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 308 | * png.c: png_convert_to_rfc_1123() in png.c |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 309 | * (formerly png_convert_to_rfc_1152() in error) |
| 310 | * png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c |
| 311 | * png_convert_from_time_t() in pngwrite.c |
| 312 | * png_get_tIME() in pngget.c |
| 313 | * png_handle_tIME() in pngrutil.c, called in pngread.c |
| 314 | * png_set_tIME() in pngset.c |
| 315 | * png_write_tIME() in pngwutil.c, called in pngwrite.c |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 316 | * |
| 317 | * All handle dates properly in a Y2K environment. The |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 318 | * png_convert_from_time_t() function calls gmtime() to convert from system |
| 319 | * clock time, which returns (year - 1900), which we properly convert to |
| 320 | * the full 4-digit year. There is a possibility that applications using |
| 321 | * 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] | 322 | * function, or that they are incorrectly passing only a 2-digit year |
| 323 | * instead of "year - 1900" into the png_convert_from_struct_tm() function, |
| 324 | * but this is not under our control. The libpng documentation has always |
| 325 | * stated that it works with 4-digit years, and the APIs have been |
| 326 | * documented as such. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 327 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 328 | * The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned |
| 329 | * 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] | 330 | * |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 331 | * zlib, upon which libpng depends, is also Y2K compliant. It contains |
| 332 | * no date-related code. |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 333 | * |
Glenn Randers-Pehrson | 87544ac | 1999-01-13 22:06:39 -0600 | [diff] [blame] | 334 | * Glenn Randers-Pehrson |
| 335 | * libpng maintainer |
| 336 | * PNG Development Group |
Glenn Randers-Pehrson | bcfd15d | 1999-10-01 14:22:25 -0500 | [diff] [blame] | 337 | */ |
| 338 | |
Glenn Randers-Pehrson | 1394480 | 2000-06-24 07:42:42 -0500 | [diff] [blame] | 339 | #ifndef PNG_H |
| 340 | #define PNG_H |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 341 | |
| 342 | /* This is not the place to learn how to use libpng. The file libpng.txt |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 343 | * describes how to use libpng, and the file example.c summarizes it |
| 344 | * with some code on which to build. This file is useful for looking |
| 345 | * at the actual function definitions and structure components. |
| 346 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 347 | |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 348 | /* Version information for png.h - this should match the version in png.c */ |
Glenn Randers-Pehrson | 33d8c2a | 2010-07-30 14:50:04 -0500 | [diff] [blame] | 349 | #define PNG_LIBPNG_VER_STRING "1.5.0beta38" |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 350 | #define PNG_HEADER_VERSION_STRING \ |
Glenn Randers-Pehrson | 33d8c2a | 2010-07-30 14:50:04 -0500 | [diff] [blame] | 351 | " libpng version 1.5.0beta38 - July 30, 2010\n" |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 352 | |
Glenn Randers-Pehrson | f1eb918 | 2010-02-08 15:36:41 -0600 | [diff] [blame] | 353 | #define PNG_LIBPNG_VER_SONUM 15 |
| 354 | #define PNG_LIBPNG_VER_DLLNUM 15 |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 355 | |
| 356 | /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */ |
| 357 | #define PNG_LIBPNG_VER_MAJOR 1 |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 358 | #define PNG_LIBPNG_VER_MINOR 5 |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 359 | #define PNG_LIBPNG_VER_RELEASE 0 |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 360 | /* This should match the numeric part of the final component of |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 361 | * PNG_LIBPNG_VER_STRING, omitting any leading zero: |
| 362 | */ |
Glenn Randers-Pehrson | d56aca7 | 2000-11-23 11:51:42 -0600 | [diff] [blame] | 363 | |
Glenn Randers-Pehrson | 33d8c2a | 2010-07-30 14:50:04 -0500 | [diff] [blame] | 364 | #define PNG_LIBPNG_VER_BUILD 38 |
Glenn Randers-Pehrson | d56aca7 | 2000-11-23 11:51:42 -0600 | [diff] [blame] | 365 | |
Glenn Randers-Pehrson | 4093607 | 2004-11-20 11:18:40 -0600 | [diff] [blame] | 366 | /* Release Status */ |
Glenn Randers-Pehrson | d56aca7 | 2000-11-23 11:51:42 -0600 | [diff] [blame] | 367 | #define PNG_LIBPNG_BUILD_ALPHA 1 |
| 368 | #define PNG_LIBPNG_BUILD_BETA 2 |
| 369 | #define PNG_LIBPNG_BUILD_RC 3 |
| 370 | #define PNG_LIBPNG_BUILD_STABLE 4 |
Glenn Randers-Pehrson | 4093607 | 2004-11-20 11:18:40 -0600 | [diff] [blame] | 371 | #define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7 |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 372 | |
Glenn Randers-Pehrson | 4093607 | 2004-11-20 11:18:40 -0600 | [diff] [blame] | 373 | /* Release-Specific Flags */ |
| 374 | #define PNG_LIBPNG_BUILD_PATCH 8 /* Can be OR'ed with |
| 375 | PNG_LIBPNG_BUILD_STABLE only */ |
| 376 | #define PNG_LIBPNG_BUILD_PRIVATE 16 /* Cannot be OR'ed with |
| 377 | PNG_LIBPNG_BUILD_SPECIAL */ |
| 378 | #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with |
| 379 | PNG_LIBPNG_BUILD_PRIVATE */ |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 380 | |
Glenn Randers-Pehrson | 1721829 | 2006-04-20 07:20:46 -0500 | [diff] [blame] | 381 | #define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 382 | |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 383 | /* Careful here. At one time, Guy wanted to use 082, but that would be octal. |
| 384 | * We must not include leading zeros. |
| 385 | * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only |
| 386 | * 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] | 387 | * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release |
| 388 | */ |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 389 | #define PNG_LIBPNG_VER 10500 /* 1.5.0 */ |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 390 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 391 | /* Library configuration: these options cannot be changed after |
| 392 | * the library has been built. |
| 393 | */ |
| 394 | #ifndef PNGLCONF_H |
Glenn Randers-Pehrson | 98b4f00 | 2010-04-16 22:30:26 -0500 | [diff] [blame] | 395 | # include "pnglibconf.h" |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 396 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 397 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 398 | #ifndef PNG_VERSION_INFO_ONLY |
| 399 | /* Standard header files (not needed for the version info) */ |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 400 | # ifdef PNG_SETJMP_SUPPORTED |
| 401 | # include <setjmp.h> |
| 402 | # endif |
| 403 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 404 | /* Need the time information for converting tIME chunks, it |
| 405 | * defines struct tm: |
| 406 | */ |
| 407 | #ifdef PNG_CONVERT_tIME_SUPPORTED |
| 408 | /* "time.h" functions are not supported on all operating systems */ |
| 409 | # include <time.h> |
| 410 | #endif |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 411 | |
| 412 | /* Machine specific configuration. */ |
| 413 | # include "pngconf.h" |
| 414 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 415 | |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 416 | /* |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 417 | * Added at libpng-1.2.8 |
| 418 | * |
| 419 | * Ref MSDN: Private as priority over Special |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 420 | * VS_FF_PRIVATEBUILD File *was not* built using standard release |
| 421 | * procedures. If this value is given, the StringFileInfo block must |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 422 | * contain a PrivateBuild string. |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 423 | * |
| 424 | * VS_FF_SPECIALBUILD File *was* built by the original company using |
| 425 | * standard release procedures but is a variation of the standard |
| 426 | * 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] | 427 | * StringFileInfo block must contain a SpecialBuild string. |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 428 | */ |
| 429 | |
Glenn Randers-Pehrson | 98b4f00 | 2010-04-16 22:30:26 -0500 | [diff] [blame] | 430 | #ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */ |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 431 | # define PNG_LIBPNG_BUILD_TYPE \ |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 432 | (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE) |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 433 | #else |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 434 | # ifdef PNG_LIBPNG_SPECIALBUILD |
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_SPECIAL) |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 437 | # else |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 438 | # define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE) |
Glenn Randers-Pehrson | 5dd2b8e | 2004-11-24 07:50:16 -0600 | [diff] [blame] | 439 | # endif |
| 440 | #endif |
| 441 | |
| 442 | #ifndef PNG_VERSION_INFO_ONLY |
| 443 | |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 444 | /* Inhibit C++ name-mangling for libpng functions but not for system calls. */ |
| 445 | #ifdef __cplusplus |
| 446 | extern "C" { |
| 447 | #endif /* __cplusplus */ |
| 448 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 449 | /* Version information for C files, stored in png.c. This had better match |
| 450 | * the version above. |
| 451 | */ |
Glenn Randers-Pehrson | 4c8f726 | 2010-03-16 19:30:01 -0500 | [diff] [blame] | 452 | #define png_libpng_ver png_get_header_ver(NULL) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 453 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 454 | /* This file is arranged in several sections: |
| 455 | * |
| 456 | * 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] | 457 | * 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] | 458 | * 2. Type definitions (base types are defined in pngconf.h), structure |
| 459 | * definitions. |
| 460 | * 3. Exported library functions. |
| 461 | * |
| 462 | * The library source code has additional files (principally pngpriv.h) that |
| 463 | * allow configuration of the library. |
| 464 | */ |
| 465 | /* Section 1: run time configuration |
Glenn Randers-Pehrson | 98b4f00 | 2010-04-16 22:30:26 -0500 | [diff] [blame] | 466 | * See pnglibconf.h for build time configuration |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 467 | * |
| 468 | * Run time configuration allows the application to choose between |
| 469 | * implementations of certain arithmetic APIs. The default is set |
Glenn Randers-Pehrson | 98b4f00 | 2010-04-16 22:30:26 -0500 | [diff] [blame] | 470 | * 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] | 471 | * override these (and only these) settings. Note that this won't |
| 472 | * change what the library does, only application code, and the |
| 473 | * settings can (and probably should) be made on a per-file basis |
| 474 | * by setting the #defines before including png.h |
| 475 | * |
| 476 | * Use macros to read integers from PNG data or use the exported |
| 477 | * functions? |
| 478 | * PNG_USE_READ_MACROS: use the macros (see below) Note that |
| 479 | * the macros evaluate their argument multiple times. |
| 480 | * PNG_NO_USE_READ_MACROS: call the relevant library function. |
| 481 | * |
| 482 | * Use the alternative algorithm for compositing alpha samples that |
| 483 | * does not use division? |
| 484 | * PNG_READ_COMPOSITE_NODIV_SUPPORTED: use the 'no division' |
| 485 | * algorithm. |
| 486 | * PNG_NO_READ_COMPOSITE_NODIV: use the 'division' algorithm. |
| 487 | * |
| 488 | * How to handle benign errors if PNG_ALLOW_BENIGN_ERRORS is |
| 489 | * false? |
| 490 | * PNG_ALLOW_BENIGN_ERRORS: map calls to the benign error |
| 491 | * APIs to png_warning. |
| 492 | * Otherwise the calls are mapped to png_error. |
| 493 | */ |
| 494 | |
| 495 | /* Section 2: type definitions, including structures and compile time |
| 496 | * constants. |
| 497 | * See pngconf.h for base types that vary by machine/system |
| 498 | */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 499 | /* Three color definitions. The order of the red, green, and blue, (and the |
| 500 | * exact size) is not important, although the size of the fields need to |
| 501 | * be png_byte or png_uint_16 (as defined below). |
| 502 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 503 | typedef struct png_color_struct |
| 504 | { |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 505 | png_byte red; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 506 | png_byte green; |
| 507 | png_byte blue; |
| 508 | } png_color; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 509 | typedef png_color FAR * png_colorp; |
| 510 | typedef png_color FAR * FAR * png_colorpp; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 511 | |
| 512 | typedef struct png_color_16_struct |
| 513 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 514 | png_byte index; /* used for palette files */ |
| 515 | png_uint_16 red; /* for use in red green blue files */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 516 | png_uint_16 green; |
| 517 | png_uint_16 blue; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 518 | png_uint_16 gray; /* for use in grayscale files */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 519 | } png_color_16; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 520 | typedef png_color_16 FAR * png_color_16p; |
| 521 | typedef png_color_16 FAR * FAR * png_color_16pp; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 522 | |
| 523 | typedef struct png_color_8_struct |
| 524 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 525 | png_byte red; /* for use in red green blue files */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 526 | png_byte green; |
| 527 | png_byte blue; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 528 | png_byte gray; /* for use in grayscale files */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 529 | png_byte alpha; /* for alpha channel files */ |
| 530 | } png_color_8; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 531 | typedef png_color_8 FAR * png_color_8p; |
| 532 | typedef png_color_8 FAR * FAR * png_color_8pp; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 533 | |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 534 | /* |
| 535 | * The following two structures are used for the in-core representation |
| 536 | * of sPLT chunks. |
| 537 | */ |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 538 | typedef struct png_sPLT_entry_struct |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 539 | { |
| 540 | png_uint_16 red; |
| 541 | png_uint_16 green; |
| 542 | png_uint_16 blue; |
| 543 | png_uint_16 alpha; |
| 544 | png_uint_16 frequency; |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 545 | } png_sPLT_entry; |
| 546 | typedef png_sPLT_entry FAR * png_sPLT_entryp; |
| 547 | typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 548 | |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 549 | /* When the depth of the sPLT palette is 8 bits, the color and alpha samples |
| 550 | * occupy the LSB of their respective members, and the MSB of each member |
| 551 | * is zero-filled. The frequency member always occupies the full 16 bits. |
| 552 | */ |
| 553 | |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 554 | typedef struct png_sPLT_struct |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 555 | { |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 556 | png_charp name; /* palette name */ |
| 557 | png_byte depth; /* depth of palette samples */ |
| 558 | png_sPLT_entryp entries; /* palette entries */ |
| 559 | png_int_32 nentries; /* number of palette entries */ |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 560 | } png_sPLT_t; |
| 561 | typedef png_sPLT_t FAR * png_sPLT_tp; |
| 562 | typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 563 | |
| 564 | #ifdef PNG_TEXT_SUPPORTED |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 565 | /* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file, |
| 566 | * and whether that contents is compressed or not. The "key" field |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 567 | * points to a regular zero-terminated C string. The "text", "lang", and |
| 568 | * "lang_key" fields can be regular C strings, empty strings, or NULL pointers. |
| 569 | * However, the * structure returned by png_get_text() will always contain |
| 570 | * regular zero-terminated C strings (possibly empty), never NULL pointers, |
| 571 | * so they can be safely used in printf() and other string-handling functions. |
| 572 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 573 | typedef struct png_text_struct |
| 574 | { |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 575 | int compression; /* compression value: |
| 576 | -1: tEXt, none |
| 577 | 0: zTXt, deflate |
| 578 | 1: iTXt, none |
| 579 | 2: iTXt, deflate */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 580 | png_charp key; /* keyword, 1-79 character description of "text" */ |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 581 | png_charp text; /* comment, may be an empty string (ie "") |
| 582 | or a NULL pointer */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 583 | png_size_t text_length; /* length of the text string */ |
| 584 | png_size_t itxt_length; /* length of the itxt string */ |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 585 | png_charp lang; /* language code, 0-79 characters |
| 586 | or a NULL pointer */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 587 | 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] | 588 | chars or a NULL pointer */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 589 | } png_text; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 590 | typedef png_text FAR * png_textp; |
| 591 | typedef png_text FAR * FAR * png_textpp; |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 592 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 593 | |
| 594 | /* Supported compression types for text in PNG files (tEXt, and zTXt). |
| 595 | * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */ |
| 596 | #define PNG_TEXT_COMPRESSION_NONE_WR -3 |
| 597 | #define PNG_TEXT_COMPRESSION_zTXt_WR -2 |
| 598 | #define PNG_TEXT_COMPRESSION_NONE -1 |
| 599 | #define PNG_TEXT_COMPRESSION_zTXt 0 |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 600 | #define PNG_ITXT_COMPRESSION_NONE 1 |
| 601 | #define PNG_ITXT_COMPRESSION_zTXt 2 |
| 602 | #define PNG_TEXT_COMPRESSION_LAST 3 /* Not a valid value */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 603 | |
| 604 | /* 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] | 605 | * Two conversions are provided, both from time_t and struct tm. There |
| 606 | * is no portable way to convert to either of these structures, as far |
| 607 | * 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] | 608 | * note - PNG has always been Year 2000 compliant! |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 609 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 610 | typedef struct png_time_struct |
| 611 | { |
| 612 | png_uint_16 year; /* full year, as in, 1995 */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 613 | png_byte month; /* month of year, 1 - 12 */ |
| 614 | png_byte day; /* day of month, 1 - 31 */ |
| 615 | png_byte hour; /* hour of day, 0 - 23 */ |
| 616 | png_byte minute; /* minute of hour, 0 - 59 */ |
| 617 | png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 618 | } png_time; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 619 | typedef png_time FAR * png_timep; |
| 620 | typedef png_time FAR * FAR * png_timepp; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 621 | |
Glenn Randers-Pehrson | 38674ec | 2009-06-16 13:33:01 -0500 | [diff] [blame] | 622 | #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 623 | defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 624 | /* png_unknown_chunk is a structure to hold queued chunks for which there is |
| 625 | * no specific support. The idea is that we can use this to queue |
| 626 | * up private chunks for output even though the library doesn't actually |
| 627 | * know about their semantics. |
| 628 | */ |
| 629 | typedef struct png_unknown_chunk_t |
| 630 | { |
| 631 | png_byte name[5]; |
| 632 | png_byte *data; |
| 633 | png_size_t size; |
| 634 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 635 | /* libpng-using applications should NOT directly modify this byte. */ |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 636 | png_byte location; /* mode of operation at read time */ |
| 637 | } |
| 638 | png_unknown_chunk; |
| 639 | typedef png_unknown_chunk FAR * png_unknown_chunkp; |
| 640 | typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp; |
| 641 | #endif |
| 642 | |
Glenn Randers-Pehrson | f0cdbe7 | 2010-02-08 23:18:15 -0600 | [diff] [blame] | 643 | typedef struct png_info_def png_info; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 644 | typedef png_info FAR * png_infop; |
| 645 | typedef png_info FAR * FAR * png_infopp; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 646 | |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 647 | /* Maximum positive integer used in PNG is (2^31)-1 */ |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 648 | #define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL) |
Glenn Randers-Pehrson | 7806777 | 2004-11-02 21:49:39 -0600 | [diff] [blame] | 649 | #define PNG_UINT_32_MAX ((png_uint_32)(-1)) |
| 650 | #define PNG_SIZE_MAX ((png_size_t)(-1)) |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 651 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 652 | /* These are constants for fixed point values encoded in the |
| 653 | * PNG specification manner (x100000) |
| 654 | */ |
| 655 | #define PNG_FP_1 100000 |
| 656 | #define PNG_FP_HALF 50000 |
| 657 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 658 | /* These describe the color_type field in png_info. */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 659 | /* color type masks */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 660 | #define PNG_COLOR_MASK_PALETTE 1 |
| 661 | #define PNG_COLOR_MASK_COLOR 2 |
| 662 | #define PNG_COLOR_MASK_ALPHA 4 |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 663 | |
| 664 | /* color types. Note that not all combinations are legal */ |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 665 | #define PNG_COLOR_TYPE_GRAY 0 |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 666 | #define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE) |
| 667 | #define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR) |
| 668 | #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] | 669 | #define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA) |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 670 | /* aliases */ |
| 671 | #define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA |
| 672 | #define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 673 | |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 674 | /* 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] | 675 | #define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */ |
| 676 | #define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE |
| 677 | |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 678 | /* 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] | 679 | #define PNG_FILTER_TYPE_BASE 0 /* Single row per-byte filtering */ |
Glenn Randers-Pehrson | 2ad31ae | 2000-12-15 08:54:42 -0600 | [diff] [blame] | 680 | #define PNG_INTRAPIXEL_DIFFERENCING 64 /* Used only in MNG datastreams */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 681 | #define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE |
| 682 | |
| 683 | /* These are for the interlacing type. These values should NOT be changed. */ |
| 684 | #define PNG_INTERLACE_NONE 0 /* Non-interlaced image */ |
| 685 | #define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */ |
| 686 | #define PNG_INTERLACE_LAST 2 /* Not a valid value */ |
| 687 | |
| 688 | /* These are for the oFFs chunk. These values should NOT be changed. */ |
| 689 | #define PNG_OFFSET_PIXEL 0 /* Offset in pixels */ |
| 690 | #define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */ |
| 691 | #define PNG_OFFSET_LAST 2 /* Not a valid value */ |
| 692 | |
| 693 | /* These are for the pCAL chunk. These values should NOT be changed. */ |
| 694 | #define PNG_EQUATION_LINEAR 0 /* Linear transformation */ |
| 695 | #define PNG_EQUATION_BASE_E 1 /* Exponential base e transform */ |
| 696 | #define PNG_EQUATION_ARBITRARY 2 /* Arbitrary base exponential transform */ |
| 697 | #define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */ |
| 698 | #define PNG_EQUATION_LAST 4 /* Not a valid value */ |
| 699 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 700 | /* These are for the sCAL chunk. These values should NOT be changed. */ |
| 701 | #define PNG_SCALE_UNKNOWN 0 /* unknown unit (image scale) */ |
| 702 | #define PNG_SCALE_METER 1 /* meters per pixel */ |
| 703 | #define PNG_SCALE_RADIAN 2 /* radians per pixel */ |
| 704 | #define PNG_SCALE_LAST 3 /* Not a valid value */ |
| 705 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 706 | /* These are for the pHYs chunk. These values should NOT be changed. */ |
| 707 | #define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */ |
| 708 | #define PNG_RESOLUTION_METER 1 /* pixels/meter */ |
| 709 | #define PNG_RESOLUTION_LAST 2 /* Not a valid value */ |
| 710 | |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 711 | /* 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] | 712 | #define PNG_sRGB_INTENT_PERCEPTUAL 0 |
| 713 | #define PNG_sRGB_INTENT_RELATIVE 1 |
| 714 | #define PNG_sRGB_INTENT_SATURATION 2 |
| 715 | #define PNG_sRGB_INTENT_ABSOLUTE 3 |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 716 | #define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */ |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 717 | |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 718 | /* This is for text chunks */ |
| 719 | #define PNG_KEYWORD_MAX_LENGTH 79 |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 720 | |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 721 | /* Maximum number of entries in PLTE/sPLT/tRNS arrays */ |
Glenn Randers-Pehrson | d1e8c86 | 2002-06-20 06:54:34 -0500 | [diff] [blame] | 722 | #define PNG_MAX_PALETTE_LENGTH 256 |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 723 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 724 | /* These determine if an ancillary chunk's data has been successfully read |
| 725 | * from the PNG header, or if the application has filled in the corresponding |
| 726 | * data in the info_struct to be written into the output file. The values |
| 727 | * of the PNG_INFO_<chunk> defines should NOT be changed. |
| 728 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 729 | #define PNG_INFO_gAMA 0x0001 |
| 730 | #define PNG_INFO_sBIT 0x0002 |
| 731 | #define PNG_INFO_cHRM 0x0004 |
| 732 | #define PNG_INFO_PLTE 0x0008 |
| 733 | #define PNG_INFO_tRNS 0x0010 |
| 734 | #define PNG_INFO_bKGD 0x0020 |
| 735 | #define PNG_INFO_hIST 0x0040 |
| 736 | #define PNG_INFO_pHYs 0x0080 |
| 737 | #define PNG_INFO_oFFs 0x0100 |
| 738 | #define PNG_INFO_tIME 0x0200 |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 739 | #define PNG_INFO_pCAL 0x0400 |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 740 | #define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */ |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 741 | #define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ |
| 742 | #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ |
| 743 | #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 744 | #define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 745 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 746 | /* This is used for the transformation routines, as some of them |
| 747 | * change these values for the row. It also should enable using |
| 748 | * the routines for other purposes. |
| 749 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 750 | typedef struct png_row_info_struct |
| 751 | { |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 752 | png_uint_32 width; /* width of row */ |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 753 | png_size_t rowbytes; /* number of bytes in row */ |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 754 | png_byte color_type; /* color type of row */ |
| 755 | png_byte bit_depth; /* bit depth of row */ |
| 756 | png_byte channels; /* number of channels (1, 2, 3, or 4) */ |
| 757 | png_byte pixel_depth; /* bits per pixel (depth * channels) */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 758 | } png_row_info; |
| 759 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 760 | typedef png_row_info FAR * png_row_infop; |
| 761 | typedef png_row_info FAR * FAR * png_row_infopp; |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 762 | |
Glenn Randers-Pehrson | 8686fff | 1998-05-21 09:27:50 -0500 | [diff] [blame] | 763 | /* These are the function types for the I/O functions and for the functions |
| 764 | * that allow the user to override the default I/O functions with his or her |
| 765 | * own. The png_error_ptr type should match that of user-supplied warning |
| 766 | * and error functions, while the png_rw_ptr type should match that of the |
| 767 | * user read/write data functions. |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 768 | */ |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 769 | typedef struct png_struct_def png_struct; |
| 770 | typedef png_struct FAR * png_structp; |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 771 | |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 772 | typedef PNG_CALLBACK(void, *png_error_ptr, (png_structp, png_const_charp),); |
| 773 | typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t),); |
| 774 | typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp),); |
| 775 | typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32, |
| 776 | int),); |
| 777 | typedef PNG_CALLBACK(void, *png_write_status_ptr, (png_structp, png_uint_32, |
| 778 | int),); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 779 | |
Guy Schalnat | 69b1448 | 1996-01-10 02:56:49 -0600 | [diff] [blame] | 780 | #ifdef PNG_PROGRESSIVE_READ_SUPPORTED |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 781 | typedef PNG_CALLBACK(void, *png_progressive_info_ptr, |
| 782 | (png_structp, png_infop),); |
| 783 | typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop),); |
| 784 | typedef PNG_CALLBACK(void, *png_progressive_row_ptr, (png_structp, png_bytep, |
| 785 | png_uint_32, int),); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 786 | #endif |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 787 | |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 788 | #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ |
Glenn Randers-Pehrson | 33188ac | 2009-06-16 14:12:35 -0500 | [diff] [blame] | 789 | defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 790 | typedef PNG_CALLBACK(void, *png_user_transform_ptr, (png_structp, png_row_infop, |
| 791 | png_bytep),); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 792 | #endif |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 793 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 794 | #ifdef PNG_USER_CHUNKS_SUPPORTED |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 795 | typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp, |
| 796 | png_unknown_chunkp),); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 797 | #endif |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 798 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 799 | typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp),); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 800 | #endif |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 801 | #ifdef PNG_SETJMP_SUPPORTED |
| 802 | /* This must match the function definition in <setjmp.h>, and the |
| 803 | * application must include this before png.h to obtain the definition |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 804 | * of jmp_buf. The function is required to be PNG_NORETURN. |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 805 | * |
| 806 | * If you get a type warning from the compiler when linking against this line |
| 807 | * then your compiler has 'longjmp' that does not match the requirements of the |
| 808 | * compiler that built libpng. You will have to write a wrapper function for |
| 809 | * your compiler's longjmp and call png_set_longjmp_fn directly (not via the |
| 810 | * png_jmpbuf macro.) |
| 811 | * |
| 812 | * If you get a warning here while building the library you will need to make |
| 813 | * changes to ensure that pnglibconf.h records the calling convention used by |
| 814 | * your compiler. This may be very difficult - try using a different compiler |
| 815 | * to build the library! |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 816 | */ |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 817 | typedef void (PNGCAPI *png_longjmp_ptr) PNGARG((jmp_buf, int)) PNG_NORETURN; |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 818 | #endif |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 819 | |
| 820 | /* Transform masks for the high-level interface */ |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 821 | #define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */ |
| 822 | #define PNG_TRANSFORM_STRIP_16 0x0001 /* read only */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 823 | #define PNG_TRANSFORM_STRIP_ALPHA 0x0002 /* read only */ |
| 824 | #define PNG_TRANSFORM_PACKING 0x0004 /* read and write */ |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 825 | #define PNG_TRANSFORM_PACKSWAP 0x0008 /* read and write */ |
| 826 | #define PNG_TRANSFORM_EXPAND 0x0010 /* read only */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 827 | #define PNG_TRANSFORM_INVERT_MONO 0x0020 /* read and write */ |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 828 | #define PNG_TRANSFORM_SHIFT 0x0040 /* read and write */ |
| 829 | #define PNG_TRANSFORM_BGR 0x0080 /* read and write */ |
| 830 | #define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 831 | #define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */ |
Glenn Randers-Pehrson | db66d44 | 2000-06-23 21:38:16 -0500 | [diff] [blame] | 832 | #define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */ |
Glenn Randers-Pehrson | 99708d5 | 2009-06-29 17:30:00 -0500 | [diff] [blame] | 833 | #define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only */ |
Glenn Randers-Pehrson | 1eb14e9 | 2008-12-10 07:14:45 -0600 | [diff] [blame] | 834 | /* Added to libpng-1.2.34 */ |
Glenn Randers-Pehrson | 0ffb71a | 2009-02-28 06:08:20 -0600 | [diff] [blame] | 835 | #define PNG_TRANSFORM_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER |
Glenn Randers-Pehrson | 99708d5 | 2009-06-29 17:30:00 -0500 | [diff] [blame] | 836 | #define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */ |
| 837 | /* Added to libpng-1.4.0 */ |
| 838 | #define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 839 | |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 840 | /* Flags for MNG supported features */ |
Glenn Randers-Pehrson | d56aca7 | 2000-11-23 11:51:42 -0600 | [diff] [blame] | 841 | #define PNG_FLAG_MNG_EMPTY_PLTE 0x01 |
Glenn Randers-Pehrson | d56aca7 | 2000-11-23 11:51:42 -0600 | [diff] [blame] | 842 | #define PNG_FLAG_MNG_FILTER_64 0x04 |
Glenn Randers-Pehrson | 408b421 | 2000-12-18 09:33:57 -0600 | [diff] [blame] | 843 | #define PNG_ALL_MNG_FEATURES 0x05 |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 844 | |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 845 | /* NOTE: prior to 1.5 these functions had no 'API' style declaration, |
| 846 | * this allowed the zlib default functions to be used on Windows |
| 847 | * platforms. In 1.5 the zlib default malloc (which just calls malloc and |
| 848 | * ignores the first argument) should be completely compatible with the |
| 849 | * following. |
| 850 | */ |
| 851 | typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp, |
| 852 | png_alloc_size_t),); |
| 853 | typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp),); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 854 | |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 855 | /* This triggers a compiler error in png.c, if png.c and png.h |
| 856 | * do not agree upon the version number. |
Glenn Randers-Pehrson | bcfd15d | 1999-10-01 14:22:25 -0500 | [diff] [blame] | 857 | */ |
Glenn Randers-Pehrson | 33d8c2a | 2010-07-30 14:50:04 -0500 | [diff] [blame] | 858 | typedef png_structp version_1_5_0beta38; |
Glenn Randers-Pehrson | bcfd15d | 1999-10-01 14:22:25 -0500 | [diff] [blame] | 859 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 860 | typedef png_struct FAR * FAR * png_structpp; |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 861 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 862 | /* Section 3: exported functions |
| 863 | * Here are the function definitions most commonly used. This is not |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 864 | * the place to find out how to use libpng. See libpng.txt for the |
| 865 | * full explanation, see example.c for the summary. This just provides |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 866 | * a simple one line description of the use of each function. |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 867 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 868 | |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 869 | /* Returns the version number of the library */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 870 | PNG_EXPORT(png_uint_32,png_access_version_number,(void),,1); |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 871 | |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 872 | /* Tell lib we have already handled the first <num_bytes> magic bytes. |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 873 | * Handling more than 8 bytes from the beginning of the file is an error. |
| 874 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 875 | PNG_EXPORT(void,png_set_sig_bytes,(png_structp png_ptr, int num_bytes),,2); |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 876 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 877 | /* Check sig[start] through sig[start + num_to_check - 1] to see if it's a |
| 878 | * PNG file. Returns zero if the supplied bytes match the 8-byte PNG |
| 879 | * signature, and non-zero otherwise. Having num_to_check == 0 or |
| 880 | * start > 7 will always fail (ie return non-zero). |
| 881 | */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 882 | PNG_EXPORT(int,png_sig_cmp,(png_bytep sig, png_size_t start, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 883 | png_size_t num_to_check),,3); |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 884 | |
Glenn Randers-Pehrson | 3e42a99 | 2010-03-31 22:16:07 -0500 | [diff] [blame] | 885 | /* Simple signature checking function. This is the same as calling |
| 886 | * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). |
| 887 | */ |
| 888 | #define png_check_sig(sig,n) !png_sig_cmp((sig), 0, (n)) |
| 889 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 890 | /* Allocate and initialize png_ptr struct for reading, and any other memory. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 891 | PNG_EXPORT(png_structp,png_create_read_struct,(png_const_charp user_png_ver, |
| 892 | png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn), |
| 893 | PNG_ALLOCATED,4); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 894 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 895 | /* Allocate and initialize png_ptr struct for writing, and any other memory */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 896 | PNG_EXPORT(png_structp,png_create_write_struct,(png_const_charp user_png_ver, |
| 897 | png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn), |
| 898 | PNG_ALLOCATED,5); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 899 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 900 | PNG_EXPORT(png_size_t,png_get_compression_buffer_size,(png_structp png_ptr),,6); |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 901 | |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 902 | PNG_EXPORT(void,png_set_compression_buffer_size,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 903 | png_size_t size),,7); |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 904 | |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 905 | /* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp |
| 906 | * match up. |
| 907 | */ |
| 908 | #ifdef PNG_SETJMP_SUPPORTED |
| 909 | /* This function returns the jmp_buf built in to *png_ptr. It must be |
| 910 | * supplied with an appropriate 'longjmp' function to use on that jmp_buf |
| 911 | * unless the default error function is overridden in which case NULL is |
| 912 | * acceptable. The size of the jmp_buf is checked against the actual size |
| 913 | * allocated by the library - the call will return NULL on a mismatch |
| 914 | * indicating an ABI mismatch. |
| 915 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 916 | PNG_EXPORT(jmp_buf*,png_set_longjmp_fn,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 917 | png_longjmp_ptr longjmp_fn, size_t jmp_buf_size),,8); |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 918 | # define png_jmpbuf(png_ptr) \ |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 919 | (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf))) |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 920 | #else |
| 921 | # define png_jmpbuf(png_ptr) \ |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 922 | (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP) |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 923 | #endif |
Glenn Randers-Pehrson | f98726a | 2010-02-19 09:54:53 -0600 | [diff] [blame] | 924 | /* This function should be used by libpng applications in place of |
| 925 | * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it |
| 926 | * will use it; otherwise it will call PNG_ABORT(). This function was |
| 927 | * added in libpng-1.5.0. |
| 928 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 929 | PNG_EXPORT(void,png_longjmp,(png_structp png_ptr, int val),PNG_NORETURN,9); |
Glenn Randers-Pehrson | f4ea224 | 2009-11-20 21:38:24 -0600 | [diff] [blame] | 930 | |
Glenn Randers-Pehrson | 2b8bef1 | 2010-04-29 11:50:24 -0500 | [diff] [blame] | 931 | #ifdef PNG_READ_SUPPORTED |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 932 | /* Reset the compression stream */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 933 | PNG_EXPORT(int,png_reset_zstream,(png_structp png_ptr),,10); |
Glenn Randers-Pehrson | 2b8bef1 | 2010-04-29 11:50:24 -0500 | [diff] [blame] | 934 | #endif |
Glenn Randers-Pehrson | 228bd39 | 2000-04-23 23:14:02 -0500 | [diff] [blame] | 935 | |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 936 | /* 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] | 937 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 938 | PNG_EXPORT(png_structp,png_create_read_struct_2,(png_const_charp user_png_ver, |
| 939 | png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn, |
| 940 | png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), |
| 941 | PNG_ALLOCATED,11); |
| 942 | PNG_EXPORT(png_structp,png_create_write_struct_2,(png_const_charp user_png_ver, |
| 943 | png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warn_fn, |
| 944 | png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), |
| 945 | PNG_ALLOCATED,12); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 946 | #endif |
| 947 | |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 948 | /* Write the PNG file signature. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 949 | PNG_EXPORT(void,png_write_sig,(png_structp png_ptr),,13); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 950 | |
Glenn Randers-Pehrson | cbe52d8 | 1998-02-28 07:00:24 -0600 | [diff] [blame] | 951 | /* Write a PNG chunk - size, type, (optional) data, CRC. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 952 | PNG_EXPORT(void,png_write_chunk,(png_structp png_ptr, png_bytep chunk_name, |
| 953 | png_bytep data, png_size_t length),,14); |
Glenn Randers-Pehrson | cbe52d8 | 1998-02-28 07:00:24 -0600 | [diff] [blame] | 954 | |
| 955 | /* Write the start of a PNG chunk - length and chunk name. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 956 | PNG_EXPORT(void,png_write_chunk_start,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 957 | png_bytep chunk_name, png_uint_32 length),,15); |
Glenn Randers-Pehrson | cbe52d8 | 1998-02-28 07:00:24 -0600 | [diff] [blame] | 958 | |
| 959 | /* Write the data of a PNG chunk started with png_write_chunk_start(). */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 960 | PNG_EXPORT(void,png_write_chunk_data,(png_structp png_ptr, png_bytep data, |
| 961 | png_size_t length),,16); |
Glenn Randers-Pehrson | cbe52d8 | 1998-02-28 07:00:24 -0600 | [diff] [blame] | 962 | |
| 963 | /* Finish a chunk started with png_write_chunk_start() (includes CRC). */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 964 | PNG_EXPORT(void,png_write_chunk_end,(png_structp png_ptr),,17); |
Glenn Randers-Pehrson | cbe52d8 | 1998-02-28 07:00:24 -0600 | [diff] [blame] | 965 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 966 | /* Allocate and initialize the info structure */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 967 | PNG_EXPORT(png_infop,png_create_info_struct,(png_structp png_ptr), |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 968 | PNG_ALLOCATED,18); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 969 | |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 970 | PNG_EXPORT(void,png_info_init_3,(png_infopp info_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 971 | png_size_t png_info_struct_size),,19); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 972 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 973 | /* Writes all the PNG information before the image. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 974 | PNG_EXPORT(void,png_write_info_before_PLTE,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 975 | png_infop info_ptr),,20); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 976 | PNG_EXPORT(void,png_write_info,(png_structp png_ptr, png_infop info_ptr),,21); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 977 | |
Glenn Randers-Pehrson | dbd4014 | 2009-08-31 08:42:02 -0500 | [diff] [blame] | 978 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 979 | /* Read the information before the actual image data. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 980 | PNG_EXPORT(void,png_read_info,(png_structp png_ptr, png_infop info_ptr),,22); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 981 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 982 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 983 | #ifdef PNG_TIME_RFC1123_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 984 | PNG_EXPORT(png_charp,png_convert_to_rfc1123,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 985 | png_timep ptime),,23); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 986 | #endif |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 987 | |
Glenn Randers-Pehrson | 0cb46e2 | 2009-11-02 11:24:33 -0600 | [diff] [blame] | 988 | #ifdef PNG_CONVERT_tIME_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 989 | /* Convert from a struct tm to png_time */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 990 | PNG_EXPORT(void,png_convert_from_struct_tm,(png_timep ptime, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 991 | struct tm FAR * ttime),,24); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 992 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 993 | /* Convert from time_t to png_time. Uses gmtime() */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 994 | PNG_EXPORT(void,png_convert_from_time_t,(png_timep ptime, time_t ttime),,25); |
Glenn Randers-Pehrson | 0cb46e2 | 2009-11-02 11:24:33 -0600 | [diff] [blame] | 995 | #endif /* PNG_CONVERT_tIME_SUPPORTED */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 996 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 997 | #ifdef PNG_READ_EXPAND_SUPPORTED |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 998 | /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 999 | PNG_EXPORT(void,png_set_expand,(png_structp png_ptr),,26); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1000 | PNG_EXPORT(void,png_set_expand_gray_1_2_4_to_8,(png_structp png_ptr),,27); |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1001 | PNG_EXPORT(void,png_set_palette_to_rgb,(png_structp png_ptr),,28); |
| 1002 | PNG_EXPORT(void,png_set_tRNS_to_alpha,(png_structp png_ptr),,29); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1003 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1004 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1005 | #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1006 | /* Use blue, green, red order for pixels. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1007 | PNG_EXPORT(void,png_set_bgr,(png_structp png_ptr),,30); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1008 | #endif |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1009 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1010 | #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1011 | /* Expand the grayscale to 24-bit RGB if necessary. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1012 | PNG_EXPORT(void,png_set_gray_to_rgb,(png_structp png_ptr),,31); |
Guy Schalnat | 69b1448 | 1996-01-10 02:56:49 -0600 | [diff] [blame] | 1013 | |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 1014 | /* Reduce RGB to grayscale. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1015 | PNG_FP_EXPORT(void,png_set_rgb_to_gray,(png_structp png_ptr, int error_action, |
| 1016 | double red, double green ),,32); |
| 1017 | PNG_FIXED_EXPORT(void,png_set_rgb_to_gray_fixed,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1018 | int error_action, png_fixed_point red, png_fixed_point green),,33); |
Glenn Randers-Pehrson | a272d8f | 2010-06-25 21:45:31 -0500 | [diff] [blame] | 1019 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1020 | PNG_EXPORT(png_byte,png_get_rgb_to_gray_status,(png_structp png_ptr),,34); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1021 | #endif |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1022 | |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1023 | PNG_EXPORT(void,png_build_grayscale_palette,(int bit_depth, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1024 | png_colorp palette),,35); |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1025 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1026 | #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1027 | PNG_EXPORT(void,png_set_strip_alpha,(png_structp png_ptr),,36); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1028 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1029 | |
| 1030 | #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ |
| 1031 | defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1032 | PNG_EXPORT(void,png_set_swap_alpha,(png_structp png_ptr),,37); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1033 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1034 | |
Glenn Randers-Pehrson | c4a2ae6 | 1998-01-16 22:06:18 -0600 | [diff] [blame] | 1035 | #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ |
| 1036 | defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1037 | PNG_EXPORT(void,png_set_invert_alpha,(png_structp png_ptr),,38); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1038 | #endif |
Glenn Randers-Pehrson | c4a2ae6 | 1998-01-16 22:06:18 -0600 | [diff] [blame] | 1039 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1040 | #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) |
Glenn Randers-Pehrson | 67864af | 2004-08-28 23:30:07 -0500 | [diff] [blame] | 1041 | /* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1042 | PNG_EXPORT(void,png_set_filler,(png_structp png_ptr, png_uint_32 filler, |
| 1043 | int flags),,39); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1044 | /* The values of the PNG_FILLER_ defines should NOT be changed */ |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 1045 | # define PNG_FILLER_BEFORE 0 |
| 1046 | # define PNG_FILLER_AFTER 1 |
Glenn Randers-Pehrson | 67864af | 2004-08-28 23:30:07 -0500 | [diff] [blame] | 1047 | /* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1048 | PNG_EXPORT(void,png_set_add_alpha,(png_structp png_ptr, png_uint_32 filler, |
| 1049 | int flags),,40); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1050 | #endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1051 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1052 | #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1053 | /* Swap bytes in 16-bit depth files. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1054 | PNG_EXPORT(void,png_set_swap,(png_structp png_ptr),,41); |
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_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1058 | /* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1059 | PNG_EXPORT(void,png_set_packing,(png_structp png_ptr),,42); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1060 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1061 | |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1062 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ |
| 1063 | defined(PNG_WRITE_PACKSWAP_SUPPORTED) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1064 | /* Swap packing order of pixels in bytes. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1065 | PNG_EXPORT(void,png_set_packswap,(png_structp png_ptr),,43); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1066 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1067 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1068 | #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1069 | /* Converts files to legal bit depths. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1070 | PNG_EXPORT(void,png_set_shift,(png_structp png_ptr, png_color_8p true_bits),, |
| 1071 | 44); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1072 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1073 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1074 | #if defined(PNG_READ_INTERLACING_SUPPORTED) || \ |
| 1075 | defined(PNG_WRITE_INTERLACING_SUPPORTED) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1076 | /* Have the code handle the interlacing. Returns the number of passes. |
| 1077 | * MUST be called before png_read_update_info or png_start_read_image, otherwise |
| 1078 | * it will not have the desired effect. Note that it is still necessary to call |
| 1079 | * png_read_row or png_read_rows png_get_image_height times for each pass. |
| 1080 | */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1081 | PNG_EXPORT(int,png_set_interlace_handling,(png_structp png_ptr),,45); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1082 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1083 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1084 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
| 1085 | /* Alternatively call this to get the number of rows in the current pass. Call |
| 1086 | * this after png_read_update_info or png_start_read_image; if you call it |
| 1087 | * before it will just return the image height (which is also what it returns |
| 1088 | * for a non-interlaced image!). |
| 1089 | * |
| 1090 | * NOTE: you need to call these to find out how many times to call png_read_row |
| 1091 | * if you handle your own de-interlacing. |
| 1092 | */ |
| 1093 | PNG_EXPORT(int,png_get_num_passes,(png_structp png_ptr),,215); |
| 1094 | PNG_EXPORT(png_uint_32,png_get_num_rows,(png_structp png_ptr),,216); |
Glenn Randers-Pehrson | 2be8b64 | 2010-07-29 19:09:18 -0500 | [diff] [blame] | 1095 | PNG_EXPORT(png_uint_32,png_get_num_cols,(png_structp png_ptr),,218); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1096 | #endif |
| 1097 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1098 | #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) |
Glenn Randers-Pehrson | 104622b | 2000-05-29 08:58:03 -0500 | [diff] [blame] | 1099 | /* Invert monochrome files */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1100 | PNG_EXPORT(void,png_set_invert_mono,(png_structp png_ptr),,46); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1101 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1102 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1103 | #ifdef PNG_READ_BACKGROUND_SUPPORTED |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1104 | /* Handle alpha and tRNS by replacing with a background color. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1105 | PNG_FP_EXPORT(void,png_set_background,(png_structp png_ptr, |
| 1106 | png_color_16p background_color, int background_gamma_code, int need_expand, |
| 1107 | double background_gamma),,47); |
| 1108 | PNG_FIXED_EXPORT(void,png_set_background_fixed,(png_structp png_ptr, |
| 1109 | png_color_16p background_color, int background_gamma_code, int need_expand, |
| 1110 | png_fixed_point background_gamma),,217); |
| 1111 | #endif |
| 1112 | #ifdef PNG_READ_BACKGROUND_SUPPORTED |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 1113 | # define PNG_BACKGROUND_GAMMA_UNKNOWN 0 |
| 1114 | # define PNG_BACKGROUND_GAMMA_SCREEN 1 |
| 1115 | # define PNG_BACKGROUND_GAMMA_FILE 2 |
| 1116 | # define PNG_BACKGROUND_GAMMA_UNIQUE 3 |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1117 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1118 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1119 | #ifdef PNG_READ_16_TO_8_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1120 | /* Strip the second byte of information from a 16-bit depth file. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1121 | PNG_EXPORT(void,png_set_strip_16,(png_structp png_ptr),,48); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1122 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1123 | |
Glenn Randers-Pehrson | 3cd7cff | 2010-04-16 19:27:08 -0500 | [diff] [blame] | 1124 | #ifdef PNG_READ_QUANTIZE_SUPPORTED |
| 1125 | /* 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] | 1126 | * available. |
| 1127 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1128 | PNG_EXPORT(void,png_set_quantize,(png_structp png_ptr, png_colorp palette, |
| 1129 | int num_palette, int maximum_colors, png_uint_16p histogram, |
| 1130 | int full_quantize),,49); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1131 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1132 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1133 | #ifdef PNG_READ_GAMMA_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1134 | /* The threshold on gamma processing is configurable but hard-wired into the |
| 1135 | * library. The following is the floating point variant. |
| 1136 | */ |
| 1137 | #define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001) |
| 1138 | |
Glenn Randers-Pehrson | bcfd15d | 1999-10-01 14:22:25 -0500 | [diff] [blame] | 1139 | /* Handle gamma correction. Screen_gamma=(display_exponent) */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1140 | PNG_FP_EXPORT(void,png_set_gamma,(png_structp png_ptr, double screen_gamma, |
| 1141 | double default_file_gamma),,50); |
| 1142 | PNG_FIXED_EXPORT(void,png_set_gamma_fixed,(png_structp png_ptr, |
| 1143 | png_fixed_point screen_gamma, png_fixed_point default_file_gamma),,208); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1144 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1145 | |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1146 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1147 | #ifdef PNG_WRITE_FLUSH_SUPPORTED |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 1148 | /* Set how many lines between output flushes - 0 for no flushing */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1149 | PNG_EXPORT(void,png_set_flush,(png_structp png_ptr, int nrows),,51); |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 1150 | /* Flush the current PNG output buffer */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1151 | PNG_EXPORT(void,png_write_flush,(png_structp png_ptr),,52); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1152 | #endif |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 1153 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1154 | /* Optional update palette with requested transformations */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1155 | PNG_EXPORT(void,png_start_read_image,(png_structp png_ptr),,53); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1156 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1157 | /* Optional call to update the users info structure */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1158 | PNG_EXPORT(void,png_read_update_info,(png_structp png_ptr, png_infop info_ptr),, |
| 1159 | 54); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1160 | |
Glenn Randers-Pehrson | dbd4014 | 2009-08-31 08:42:02 -0500 | [diff] [blame] | 1161 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1162 | /* Read one or more rows of image data. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1163 | PNG_EXPORT(void,png_read_rows,(png_structp png_ptr, png_bytepp row, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1164 | png_bytepp display_row, png_uint_32 num_rows),,55); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1165 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1166 | |
Glenn Randers-Pehrson | dbd4014 | 2009-08-31 08:42:02 -0500 | [diff] [blame] | 1167 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1168 | /* Read a row of data. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1169 | PNG_EXPORT(void,png_read_row,(png_structp png_ptr, png_bytep row, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1170 | png_bytep display_row),,56); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1171 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1172 | |
Glenn Randers-Pehrson | dbd4014 | 2009-08-31 08:42:02 -0500 | [diff] [blame] | 1173 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1174 | /* Read the whole image into memory at once. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1175 | PNG_EXPORT(void,png_read_image,(png_structp png_ptr, png_bytepp image),,57); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1176 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1177 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1178 | /* Write a row of image data */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1179 | PNG_EXPORT(void,png_write_row,(png_structp png_ptr, png_bytep row),,58); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1180 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1181 | /* Write a few rows of image data */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1182 | PNG_EXPORT(void,png_write_rows,(png_structp png_ptr, png_bytepp row, |
| 1183 | png_uint_32 num_rows),,59); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1184 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1185 | /* Write the image data */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1186 | PNG_EXPORT(void,png_write_image,(png_structp png_ptr, png_bytepp image),,60); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1187 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1188 | /* Write the end of the PNG file. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1189 | PNG_EXPORT(void,png_write_end,(png_structp png_ptr, png_infop info_ptr),,61); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1190 | |
Glenn Randers-Pehrson | dbd4014 | 2009-08-31 08:42:02 -0500 | [diff] [blame] | 1191 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1192 | /* Read the end of the PNG file. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1193 | PNG_EXPORT(void,png_read_end,(png_structp png_ptr, png_infop info_ptr),,62); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1194 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1195 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1196 | /* Free any memory associated with the png_info_struct */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1197 | PNG_EXPORT(void,png_destroy_info_struct,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1198 | png_infopp info_ptr_ptr),,63); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1199 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1200 | /* Free any memory associated with the png_struct and the png_info_structs */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1201 | PNG_EXPORT(void,png_destroy_read_struct,(png_structpp png_ptr_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1202 | png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr),,64); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1203 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1204 | /* Free any memory associated with the png_struct and the png_info_structs */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1205 | PNG_EXPORT(void,png_destroy_write_struct,(png_structpp png_ptr_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1206 | png_infopp info_ptr_ptr),,65); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1207 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1208 | /* Set the libpng method of handling chunk CRC errors */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1209 | PNG_EXPORT(void,png_set_crc_action,(png_structp png_ptr, int crit_action, |
| 1210 | int ancil_action),,66); |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1211 | |
| 1212 | /* Values for png_set_crc_action() to say how to handle CRC errors in |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1213 | * ancillary and critical chunks, and whether to use the data contained |
| 1214 | * therein. Note that it is impossible to "discard" data in a critical |
| 1215 | * chunk. For versions prior to 0.90, the action was always error/quit, |
| 1216 | * whereas in version 0.90 and later, the action for CRC errors in ancillary |
| 1217 | * chunks is warn/discard. These values should NOT be changed. |
| 1218 | * |
| 1219 | * value action:critical action:ancillary |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1220 | */ |
| 1221 | #define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */ |
| 1222 | #define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */ |
| 1223 | #define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */ |
| 1224 | #define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */ |
| 1225 | #define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ |
| 1226 | #define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ |
| 1227 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1228 | /* These functions give the user control over the scan-line filtering in |
| 1229 | * libpng and the compression methods used by zlib. These functions are |
| 1230 | * mainly useful for testing, as the defaults should work with most users. |
| 1231 | * Those users who are tight on memory or want faster performance at the |
| 1232 | * expense of compression can modify them. See the compression library |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 1233 | * header file (zlib.h) for an explination of the compression functions. |
| 1234 | */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1235 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1236 | /* 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] | 1237 | * value for "method" is 0. |
| 1238 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1239 | PNG_EXPORT(void,png_set_filter,(png_structp png_ptr, int method, int filters),, |
| 1240 | 67); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1241 | |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1242 | /* 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] | 1243 | * are chosen so that they don't conflict with real filter types |
| 1244 | * below, in case they are supplied instead of the #defined constants. |
| 1245 | * These values should NOT be changed. |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1246 | */ |
| 1247 | #define PNG_NO_FILTERS 0x00 |
| 1248 | #define PNG_FILTER_NONE 0x08 |
| 1249 | #define PNG_FILTER_SUB 0x10 |
| 1250 | #define PNG_FILTER_UP 0x20 |
| 1251 | #define PNG_FILTER_AVG 0x40 |
| 1252 | #define PNG_FILTER_PAETH 0x80 |
| 1253 | #define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \ |
| 1254 | PNG_FILTER_AVG | PNG_FILTER_PAETH) |
| 1255 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1256 | /* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now. |
| 1257 | * These defines should NOT be changed. |
| 1258 | */ |
| 1259 | #define PNG_FILTER_VALUE_NONE 0 |
| 1260 | #define PNG_FILTER_VALUE_SUB 1 |
| 1261 | #define PNG_FILTER_VALUE_UP 2 |
| 1262 | #define PNG_FILTER_VALUE_AVG 3 |
| 1263 | #define PNG_FILTER_VALUE_PAETH 4 |
| 1264 | #define PNG_FILTER_VALUE_LAST 5 |
| 1265 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1266 | #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* EXPERIMENTAL */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1267 | /* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_ |
| 1268 | * defines, either the default (minimum-sum-of-absolute-differences), or |
| 1269 | * the experimental method (weighted-minimum-sum-of-absolute-differences). |
| 1270 | * |
| 1271 | * Weights are factors >= 1.0, indicating how important it is to keep the |
| 1272 | * filter type consistent between rows. Larger numbers mean the current |
| 1273 | * filter is that many times as likely to be the same as the "num_weights" |
| 1274 | * previous filters. This is cumulative for each previous row with a weight. |
| 1275 | * There needs to be "num_weights" values in "filter_weights", or it can be |
| 1276 | * NULL if the weights aren't being specified. Weights have no influence on |
| 1277 | * the selection of the first row filter. Well chosen weights can (in theory) |
| 1278 | * improve the compression for a given image. |
| 1279 | * |
| 1280 | * Costs are factors >= 1.0 indicating the relative decoding costs of a |
| 1281 | * filter type. Higher costs indicate more decoding expense, and are |
| 1282 | * therefore less likely to be selected over a filter with lower computational |
| 1283 | * costs. There needs to be a value in "filter_costs" for each valid filter |
| 1284 | * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't |
| 1285 | * setting the costs. Costs try to improve the speed of decompression without |
| 1286 | * unduly increasing the compressed image size. |
| 1287 | * |
| 1288 | * A negative weight or cost indicates the default value is to be used, and |
| 1289 | * values in the range [0.0, 1.0) indicate the value is to remain unchanged. |
| 1290 | * The default values for both weights and costs are currently 1.0, but may |
| 1291 | * change if good general weighting/cost heuristics can be found. If both |
| 1292 | * the weights and costs are set to 1.0, this degenerates the WEIGHTED method |
| 1293 | * to the UNWEIGHTED method, but with added encoding time/computation. |
| 1294 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1295 | PNG_FP_EXPORT(void,png_set_filter_heuristics,(png_structp png_ptr, |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 1296 | int heuristic_method, int num_weights, png_doublep filter_weights, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1297 | png_doublep filter_costs),,68); |
Glenn Randers-Pehrson | 1e7d7d3 | 2010-07-30 07:36:50 -0500 | [diff] [blame] | 1298 | #if 0 /* TO DO */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1299 | PNG_FIXED_EXPORT(void,png_set_filter_heuristics_fixed,(png_structp png_ptr, |
| 1300 | int heuristic_method, int num_weights, png_fixed_point_p filter_weights, |
| 1301 | png_fixed_point_p filter_costs),,209); |
Glenn Randers-Pehrson | 1e7d7d3 | 2010-07-30 07:36:50 -0500 | [diff] [blame] | 1302 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1303 | #endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ |
| 1304 | |
| 1305 | /* Heuristic used for row filter selection. These defines should NOT be |
| 1306 | * changed. |
| 1307 | */ |
| 1308 | #define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */ |
| 1309 | #define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */ |
| 1310 | #define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ |
| 1311 | #define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ |
| 1312 | |
| 1313 | /* Set the library compression level. Currently, valid values range from |
| 1314 | * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 |
| 1315 | * (0 - no compression, 9 - "maximal" compression). Note that tests have |
| 1316 | * shown that zlib compression levels 3-6 usually perform as well as level 9 |
| 1317 | * for PNG images, and do considerably fewer caclulations. In the future, |
| 1318 | * these values may not correspond directly to the zlib compression levels. |
| 1319 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1320 | PNG_EXPORT(void,png_set_compression_level,(png_structp png_ptr, int level),,69); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1321 | |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1322 | PNG_EXPORT(void,png_set_compression_mem_level,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1323 | int mem_level),,70); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1324 | |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1325 | PNG_EXPORT(void,png_set_compression_strategy,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1326 | int strategy),,71); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1327 | |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1328 | PNG_EXPORT(void,png_set_compression_window_bits,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1329 | int window_bits),,72); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1330 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1331 | PNG_EXPORT(void,png_set_compression_method,(png_structp png_ptr, int method),, |
| 1332 | 73); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1333 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1334 | /* These next functions are called for input/output, memory, and error |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1335 | * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, |
| 1336 | * and call standard C I/O routines such as fread(), fwrite(), and |
| 1337 | * fprintf(). These functions can be made to use other I/O routines |
| 1338 | * at run time for those applications that need to handle I/O in a |
| 1339 | * different manner by calling png_set_???_fn(). See libpng.txt for |
| 1340 | * more information. |
| 1341 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1342 | |
Glenn Randers-Pehrson | dbd4014 | 2009-08-31 08:42:02 -0500 | [diff] [blame] | 1343 | #ifdef PNG_STDIO_SUPPORTED |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1344 | /* Initialize the input/output for the PNG file to the default functions. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1345 | PNG_EXPORT(void,png_init_io,(png_structp png_ptr, png_FILE_p fp),,74); |
Glenn Randers-Pehrson | 70e3f54 | 1998-01-03 22:40:55 -0600 | [diff] [blame] | 1346 | #endif |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1347 | |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1348 | /* Replace the (error and abort), and warning functions with user |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1349 | * supplied functions. If no messages are to be printed you must still |
| 1350 | * write and use replacement functions. The replacement error_fn should |
| 1351 | * still do a longjmp to the last setjmp location if you are using this |
| 1352 | * method of error handling. If error_fn or warning_fn is NULL, the |
| 1353 | * default function will be used. |
| 1354 | */ |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 1355 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1356 | PNG_EXPORT(void,png_set_error_fn,(png_structp png_ptr, png_voidp error_ptr, |
| 1357 | png_error_ptr error_fn, png_error_ptr warning_fn),,75); |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1358 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1359 | /* Return the user pointer associated with the error functions */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1360 | PNG_EXPORT(png_voidp,png_get_error_ptr,(png_structp png_ptr),,76); |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1361 | |
| 1362 | /* Replace the default data output functions with a user supplied one(s). |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1363 | * If buffered output is not used, then output_flush_fn can be set to NULL. |
| 1364 | * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time |
| 1365 | * output_flush_fn will be ignored (and thus can be NULL). |
Glenn Randers-Pehrson | 8fb550c | 2009-03-21 08:15:32 -0500 | [diff] [blame] | 1366 | * It is probably a mistake to use NULL for output_flush_fn if |
| 1367 | * write_data_fn is not also NULL unless you have built libpng with |
| 1368 | * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's |
| 1369 | * default flush function, which uses the standard *FILE structure, will |
| 1370 | * be used. |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1371 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1372 | PNG_EXPORT(void,png_set_write_fn,(png_structp png_ptr, png_voidp io_ptr, |
| 1373 | png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn),,77); |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1374 | |
| 1375 | /* Replace the default data input function with a user supplied one. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1376 | PNG_EXPORT(void,png_set_read_fn,(png_structp png_ptr, png_voidp io_ptr, |
| 1377 | png_rw_ptr read_data_fn),,78); |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1378 | |
| 1379 | /* Return the user pointer associated with the I/O functions */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1380 | PNG_EXPORT(png_voidp,png_get_io_ptr,(png_structp png_ptr),,79); |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1381 | |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1382 | PNG_EXPORT(void,png_set_read_status_fn,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1383 | png_read_status_ptr read_row_fn),,80); |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 1384 | |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1385 | PNG_EXPORT(void,png_set_write_status_fn,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1386 | png_write_status_ptr write_row_fn),,81); |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 1387 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1388 | #ifdef PNG_USER_MEM_SUPPORTED |
| 1389 | /* Replace the default memory allocation functions with user supplied one(s). */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1390 | PNG_EXPORT(void,png_set_mem_fn,(png_structp png_ptr, png_voidp mem_ptr, |
| 1391 | png_malloc_ptr malloc_fn, png_free_ptr free_fn),,82); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1392 | /* Return the user pointer associated with the memory functions */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1393 | PNG_EXPORT(png_voidp,png_get_mem_ptr,(png_structp png_ptr),,83); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1394 | #endif |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1395 | |
Glenn Randers-Pehrson | 33188ac | 2009-06-16 14:12:35 -0500 | [diff] [blame] | 1396 | #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1397 | PNG_EXPORT(void,png_set_read_user_transform_fn,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1398 | png_user_transform_ptr read_user_transform_fn),,84); |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 1399 | #endif |
| 1400 | |
Glenn Randers-Pehrson | 33188ac | 2009-06-16 14:12:35 -0500 | [diff] [blame] | 1401 | #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1402 | PNG_EXPORT(void,png_set_write_user_transform_fn,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1403 | png_user_transform_ptr write_user_transform_fn),,85); |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 1404 | #endif |
| 1405 | |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1406 | #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ |
Glenn Randers-Pehrson | 33188ac | 2009-06-16 14:12:35 -0500 | [diff] [blame] | 1407 | defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1408 | PNG_EXPORT(void,png_set_user_transform_info,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1409 | png_voidp user_transform_ptr, int user_transform_depth, |
| 1410 | int user_transform_channels),,86); |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1411 | /* Return the user pointer associated with the user transform functions */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1412 | PNG_EXPORT(png_voidp,png_get_user_transform_ptr,(png_structp png_ptr),,87); |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1413 | #endif |
| 1414 | |
Glenn Randers-Pehrson | 1909560 | 2001-03-14 07:08:39 -0600 | [diff] [blame] | 1415 | #ifdef PNG_USER_CHUNKS_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1416 | PNG_EXPORT(void,png_set_read_user_chunk_fn,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1417 | png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn),,88); |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1418 | PNG_EXPORT(png_voidp,png_get_user_chunk_ptr,(png_structp png_ptr),,89); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1419 | #endif |
| 1420 | |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 1421 | #ifdef PNG_PROGRESSIVE_READ_SUPPORTED |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1422 | /* Sets the function callbacks for the push reader, and a pointer to a |
| 1423 | * user-defined structure available to the callback functions. |
| 1424 | */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1425 | PNG_EXPORT(void,png_set_progressive_read_fn,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1426 | png_voidp progressive_ptr, png_progressive_info_ptr info_fn, |
| 1427 | png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn),,90); |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1428 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1429 | /* Returns the user pointer associated with the push read functions */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1430 | PNG_EXPORT(png_voidp,png_get_progressive_ptr,(png_structp png_ptr),,91); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1431 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1432 | /* Function to be called when data becomes available */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1433 | PNG_EXPORT(void,png_process_data,(png_structp png_ptr, png_infop info_ptr, |
| 1434 | png_bytep buffer, png_size_t buffer_size),,92); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1435 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1436 | /* Function that combines rows. Not very much different than the |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1437 | * png_combine_row() call. Is this even used????? |
| 1438 | */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1439 | PNG_EXPORT(void,png_progressive_combine_row,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1440 | png_bytep old_row, png_bytep new_row),,93); |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 1441 | #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1442 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1443 | PNG_EXPORT(png_voidp,png_malloc,(png_structp png_ptr, png_alloc_size_t size), |
| 1444 | PNG_ALLOCATED,94); |
Glenn Randers-Pehrson | 0ffb71a | 2009-02-28 06:08:20 -0600 | [diff] [blame] | 1445 | /* Added at libpng version 1.4.0 */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1446 | PNG_EXPORT(png_voidp,png_calloc,(png_structp png_ptr, png_alloc_size_t size), |
| 1447 | PNG_ALLOCATED,95); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1448 | |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 1449 | /* Added at libpng version 1.2.4 */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1450 | PNG_EXPORT(png_voidp,png_malloc_warn,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1451 | png_alloc_size_t size),PNG_ALLOCATED,96); |
Glenn Randers-Pehrson | 07748d1 | 2002-05-25 11:12:10 -0500 | [diff] [blame] | 1452 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 1453 | /* Frees a pointer allocated by png_malloc() */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1454 | PNG_EXPORT(void,png_free,(png_structp png_ptr, png_voidp ptr),,97); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1455 | |
Glenn Randers-Pehrson | 38e6e77 | 2000-04-09 19:06:13 -0500 | [diff] [blame] | 1456 | /* Free data that was allocated internally */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1457 | PNG_EXPORT(void,png_free_data,(png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1458 | png_uint_32 free_me, int num),,98); |
Glenn Randers-Pehrson | 38e6e77 | 2000-04-09 19:06:13 -0500 | [diff] [blame] | 1459 | /* Reassign responsibility for freeing existing data, whether allocated |
| 1460 | * by libpng or by the application */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1461 | PNG_EXPORT(void,png_data_freer,(png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1462 | int freer, png_uint_32 mask),,99); |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1463 | /* Assignments for png_data_freer */ |
Glenn Randers-Pehrson | 38e6e77 | 2000-04-09 19:06:13 -0500 | [diff] [blame] | 1464 | #define PNG_DESTROY_WILL_FREE_DATA 1 |
| 1465 | #define PNG_SET_WILL_FREE_DATA 1 |
| 1466 | #define PNG_USER_WILL_FREE_DATA 2 |
| 1467 | /* Flags for png_ptr->free_me and info_ptr->free_me */ |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1468 | #define PNG_FREE_HIST 0x0008 |
| 1469 | #define PNG_FREE_ICCP 0x0010 |
| 1470 | #define PNG_FREE_SPLT 0x0020 |
| 1471 | #define PNG_FREE_ROWS 0x0040 |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 1472 | #define PNG_FREE_PCAL 0x0080 |
| 1473 | #define PNG_FREE_SCAL 0x0100 |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1474 | #define PNG_FREE_UNKN 0x0200 |
| 1475 | #define PNG_FREE_LIST 0x0400 |
Glenn Randers-Pehrson | 6942d53 | 2000-05-01 09:31:54 -0500 | [diff] [blame] | 1476 | #define PNG_FREE_PLTE 0x1000 |
| 1477 | #define PNG_FREE_TRNS 0x2000 |
| 1478 | #define PNG_FREE_TEXT 0x4000 |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 1479 | #define PNG_FREE_ALL 0x7fff |
Glenn Randers-Pehrson | ec61c23 | 2000-05-16 06:17:36 -0500 | [diff] [blame] | 1480 | #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] | 1481 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1482 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1483 | PNG_EXPORT(png_voidp,png_malloc_default,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1484 | png_alloc_size_t size),PNG_ALLOCATED,100); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1485 | PNG_EXPORT(void,png_free_default,(png_structp png_ptr, png_voidp ptr),,101); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1486 | #endif |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1487 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 1488 | #ifdef PNG_ERROR_TEXT_SUPPORTED |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1489 | /* Fatal error in PNG image of libpng - can't continue */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1490 | PNG_EXPORT(void,png_error,(png_structp png_ptr, png_const_charp error_message), |
| 1491 | PNG_NORETURN,102); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1492 | |
Glenn Randers-Pehrson | 70e3f54 | 1998-01-03 22:40:55 -0600 | [diff] [blame] | 1493 | /* The same, but the chunk name is prepended to the error string. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1494 | PNG_EXPORT(void,png_chunk_error,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1495 | png_const_charp error_message),PNG_NORETURN,103); |
Glenn Randers-Pehrson | 70e3f54 | 1998-01-03 22:40:55 -0600 | [diff] [blame] | 1496 | |
Glenn Randers-Pehrson | fd10753 | 2009-11-10 05:59:22 -0600 | [diff] [blame] | 1497 | #else |
| 1498 | /* Fatal error in PNG image of libpng - can't continue */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1499 | PNG_EXPORT(void,png_err,(png_structp png_ptr),PNG_NORETURN,104); |
Glenn Randers-Pehrson | fd10753 | 2009-11-10 05:59:22 -0600 | [diff] [blame] | 1500 | #endif |
| 1501 | |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1502 | /* Non-fatal error in libpng. Can continue, but may have a problem. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1503 | PNG_EXPORT(void,png_warning,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1504 | png_const_charp warning_message),,105); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1505 | |
Glenn Randers-Pehrson | 70e3f54 | 1998-01-03 22:40:55 -0600 | [diff] [blame] | 1506 | /* Non-fatal error in libpng, chunk name is prepended to message. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1507 | PNG_EXPORT(void,png_chunk_warning,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1508 | png_const_charp warning_message),,106); |
Glenn Randers-Pehrson | 70e3f54 | 1998-01-03 22:40:55 -0600 | [diff] [blame] | 1509 | |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1510 | #ifdef PNG_BENIGN_ERRORS_SUPPORTED |
| 1511 | /* Benign error in libpng. Can continue, but may have a problem. |
| 1512 | * 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] | 1513 | # undef png_benign_error |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1514 | PNG_EXPORT(void,png_benign_error,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1515 | png_const_charp warning_message),,107); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1516 | |
| 1517 | /* Same, chunk name is prepended to message. */ |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 1518 | # undef png_chunk_benign_error |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1519 | PNG_EXPORT(void,png_chunk_benign_error,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1520 | png_const_charp warning_message),,108); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1521 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1522 | PNG_EXPORT(void,png_set_benign_errors,(png_structp png_ptr, int allowed),,109); |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 1523 | #else |
| 1524 | # ifdef PNG_ALLOW_BENIGN_ERRORS |
| 1525 | # define png_benign_error png_warning |
| 1526 | # define png_chunk_benign_error png_chunk_warning |
| 1527 | # else |
| 1528 | # define png_benign_error png_error |
| 1529 | # define png_chunk_benign_error png_chunk_error |
| 1530 | # endif |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1531 | #endif |
| 1532 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1533 | /* The png_set_<chunk> functions are for storing values in the png_info_struct. |
| 1534 | * Similarly, the png_get_<chunk> calls are used to read values from the |
| 1535 | * png_info_struct, either storing the parameters in the passed variables, or |
| 1536 | * setting pointers into the png_info_struct where the data is stored. The |
| 1537 | * png_get_<chunk> functions return a non-zero value if the data was available |
| 1538 | * in info_ptr, or return zero and do not change any of the parameters if the |
| 1539 | * data was not available. |
| 1540 | * |
| 1541 | * These functions should be used instead of directly accessing png_info |
| 1542 | * to avoid problems with future changes in the size and internal layout of |
| 1543 | * png_info_struct. |
| 1544 | */ |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1545 | /* Returns "flag" if chunk data is valid in info_ptr. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1546 | PNG_EXPORT(png_uint_32,png_get_valid,(png_structp png_ptr, png_infop info_ptr, |
| 1547 | png_uint_32 flag),,110); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1548 | |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1549 | /* Returns number of bytes needed to hold a transformed row. */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1550 | PNG_EXPORT(png_size_t,png_get_rowbytes,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1551 | png_infop info_ptr),,111); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1552 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1553 | #ifdef PNG_INFO_IMAGE_SUPPORTED |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1554 | /* 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] | 1555 | * returned from png_read_png(). |
| 1556 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1557 | PNG_EXPORT(png_bytepp,png_get_rows,(png_structp png_ptr, png_infop info_ptr),, |
| 1558 | 112); |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1559 | /* 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] | 1560 | * by png_write_png(). |
| 1561 | */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1562 | PNG_EXPORT(void,png_set_rows,(png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1563 | png_bytepp row_pointers),,113); |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1564 | #endif |
| 1565 | |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1566 | /* Returns number of color channels in image. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1567 | PNG_EXPORT(png_byte,png_get_channels,(png_structp png_ptr, png_infop info_ptr),, |
| 1568 | 114); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1569 | |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1570 | #ifdef PNG_EASY_ACCESS_SUPPORTED |
| 1571 | /* Returns image width in pixels. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1572 | PNG_EXPORT(png_uint_32,png_get_image_width,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1573 | png_infop info_ptr),,115); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1574 | |
| 1575 | /* Returns image height in pixels. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1576 | PNG_EXPORT(png_uint_32,png_get_image_height,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1577 | png_infop info_ptr),,116); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1578 | |
| 1579 | /* Returns image bit_depth. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1580 | PNG_EXPORT(png_byte,png_get_bit_depth,(png_structp png_ptr, png_infop info_ptr), |
| 1581 | ,117); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1582 | |
| 1583 | /* Returns image color_type. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1584 | PNG_EXPORT(png_byte,png_get_color_type,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1585 | png_infop info_ptr),,118); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1586 | |
| 1587 | /* Returns image filter_type. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1588 | PNG_EXPORT(png_byte,png_get_filter_type,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1589 | png_infop info_ptr),,119); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1590 | |
| 1591 | /* Returns image interlace_type. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1592 | PNG_EXPORT(png_byte,png_get_interlace_type,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1593 | png_infop info_ptr),,120); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1594 | |
| 1595 | /* Returns image compression_type. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1596 | PNG_EXPORT(png_byte,png_get_compression_type,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1597 | png_infop info_ptr),,121); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1598 | |
| 1599 | /* Returns image resolution in pixels per meter, from pHYs chunk data. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1600 | PNG_EXPORT(png_uint_32,png_get_pixels_per_meter,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1601 | png_infop info_ptr),,122); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1602 | PNG_EXPORT(png_uint_32,png_get_x_pixels_per_meter,(png_structp png_ptr, |
| 1603 | png_infop info_ptr),,123); |
| 1604 | PNG_EXPORT(png_uint_32,png_get_y_pixels_per_meter,(png_structp png_ptr, |
| 1605 | png_infop info_ptr),,124); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1606 | |
| 1607 | /* Returns pixel aspect ratio, computed from pHYs chunk data. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1608 | PNG_FP_EXPORT(float,png_get_pixel_aspect_ratio,(png_structp png_ptr, |
| 1609 | png_infop info_ptr),,125); |
Glenn Randers-Pehrson | 1e7d7d3 | 2010-07-30 07:36:50 -0500 | [diff] [blame] | 1610 | #if 0 /* TO DO */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1611 | PNG_FIXED_EXPORT(png_fixed_point,png_get_pixel_aspect_ratio_fixed, |
| 1612 | (png_structp png_ptr, png_infop info_ptr),,210); |
Glenn Randers-Pehrson | 1e7d7d3 | 2010-07-30 07:36:50 -0500 | [diff] [blame] | 1613 | #endif |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1614 | |
| 1615 | /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1616 | PNG_EXPORT(png_int_32,png_get_x_offset_pixels,(png_structp png_ptr, |
| 1617 | png_infop info_ptr),,126); |
| 1618 | PNG_EXPORT(png_int_32,png_get_y_offset_pixels,(png_structp png_ptr, |
| 1619 | png_infop info_ptr),,127); |
| 1620 | PNG_EXPORT(png_int_32,png_get_x_offset_microns,(png_structp png_ptr, |
| 1621 | png_infop info_ptr),,128); |
| 1622 | PNG_EXPORT(png_int_32, png_get_y_offset_microns,(png_structp png_ptr, |
| 1623 | png_infop info_ptr),,129); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1624 | |
| 1625 | #endif /* PNG_EASY_ACCESS_SUPPORTED */ |
| 1626 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1627 | /* Returns pointer to signature string read from PNG header */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1628 | PNG_EXPORT(png_bytep,png_get_signature,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1629 | png_infop info_ptr),,130); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1630 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1631 | #ifdef PNG_bKGD_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1632 | PNG_EXPORT(png_uint_32,png_get_bKGD,(png_structp png_ptr, png_infop info_ptr, |
| 1633 | png_color_16p *background),,131); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1634 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1635 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1636 | #ifdef PNG_bKGD_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1637 | PNG_EXPORT(void,png_set_bKGD,(png_structp png_ptr, png_infop info_ptr, |
| 1638 | png_color_16p background),,132); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1639 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1640 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1641 | #ifdef PNG_cHRM_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1642 | PNG_FP_EXPORT(png_uint_32,png_get_cHRM,(png_structp png_ptr, |
| 1643 | png_infop info_ptr, double *white_x, double *white_y, double *red_x, |
| 1644 | double *red_y, double *green_x, double *green_y, double *blue_x, |
| 1645 | double *blue_y),,133); |
| 1646 | #ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */ |
| 1647 | PNG_FIXED_EXPORT(png_uint_32,png_get_cHRM_fixed,(png_structp png_ptr, |
| 1648 | png_infop info_ptr, png_fixed_point *int_white_x, |
| 1649 | png_fixed_point *int_white_y, png_fixed_point *int_red_x, |
| 1650 | png_fixed_point *int_red_y, png_fixed_point *int_green_x, |
| 1651 | png_fixed_point *int_green_y, png_fixed_point *int_blue_x, |
| 1652 | png_fixed_point *int_blue_y),,134); |
| 1653 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1654 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1655 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1656 | #ifdef PNG_cHRM_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1657 | PNG_FP_EXPORT(void,png_set_cHRM,(png_structp png_ptr, png_infop info_ptr, |
| 1658 | double white_x, double white_y, double red_x, double red_y, double green_x, |
| 1659 | double green_y, double blue_x, double blue_y),,135); |
| 1660 | PNG_FIXED_EXPORT(void,png_set_cHRM_fixed,(png_structp png_ptr, |
| 1661 | png_infop info_ptr, png_fixed_point int_white_x, |
| 1662 | png_fixed_point int_white_y, png_fixed_point int_red_x, |
| 1663 | png_fixed_point int_red_y, png_fixed_point int_green_x, |
| 1664 | png_fixed_point int_green_y, png_fixed_point int_blue_x, |
| 1665 | png_fixed_point int_blue_y),,136); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1666 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1667 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1668 | #ifdef PNG_gAMA_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1669 | PNG_FP_EXPORT(png_uint_32,png_get_gAMA,(png_structp png_ptr, png_infop info_ptr, |
| 1670 | double *file_gamma),,137); |
| 1671 | PNG_FIXED_EXPORT(png_uint_32,png_get_gAMA_fixed,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1672 | png_infop info_ptr, png_fixed_point *int_file_gamma),,138); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1673 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1674 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1675 | #ifdef PNG_gAMA_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1676 | PNG_FP_EXPORT(void,png_set_gAMA,(png_structp png_ptr, png_infop info_ptr, |
| 1677 | double file_gamma),,139); |
| 1678 | PNG_FIXED_EXPORT(void,png_set_gAMA_fixed,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1679 | png_infop info_ptr, png_fixed_point int_file_gamma),,140); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1680 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1681 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1682 | #ifdef PNG_hIST_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1683 | PNG_EXPORT(png_uint_32,png_get_hIST,(png_structp png_ptr, png_infop info_ptr, |
| 1684 | png_uint_16p *hist),,141); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1685 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1686 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1687 | #ifdef PNG_hIST_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1688 | PNG_EXPORT(void,png_set_hIST,(png_structp png_ptr, png_infop info_ptr, |
| 1689 | png_uint_16p hist),,142); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1690 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1691 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1692 | PNG_EXPORT(png_uint_32,png_get_IHDR,(png_structp png_ptr, png_infop info_ptr, |
| 1693 | png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, |
| 1694 | int *interlace_method, int *compression_method, int *filter_method),,143); |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 1695 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1696 | PNG_EXPORT(void,png_set_IHDR,(png_structp png_ptr, png_infop info_ptr, |
| 1697 | png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, |
| 1698 | int interlace_method, int compression_method, int filter_method),,144); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1699 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1700 | #ifdef PNG_oFFs_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1701 | PNG_EXPORT(png_uint_32,png_get_oFFs,(png_structp png_ptr, png_infop info_ptr, |
| 1702 | png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type),,145); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1703 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1704 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1705 | #ifdef PNG_oFFs_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1706 | PNG_EXPORT(void,png_set_oFFs,(png_structp png_ptr, png_infop info_ptr, |
| 1707 | png_int_32 offset_x, png_int_32 offset_y, int unit_type),,146); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1708 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1709 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1710 | #ifdef PNG_pCAL_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1711 | PNG_EXPORT(png_uint_32,png_get_pCAL,(png_structp png_ptr, png_infop info_ptr, |
| 1712 | png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams, |
| 1713 | png_charp *units, png_charpp *params),,147); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1714 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1715 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1716 | #ifdef PNG_pCAL_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1717 | PNG_EXPORT(void,png_set_pCAL,(png_structp png_ptr, png_infop info_ptr, |
| 1718 | png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, |
| 1719 | png_charp units, png_charpp params),,148); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1720 | #endif |
| 1721 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1722 | #ifdef PNG_pHYs_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1723 | PNG_EXPORT(png_uint_32,png_get_pHYs,(png_structp png_ptr, png_infop info_ptr, |
| 1724 | png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type),,149); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1725 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1726 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1727 | #ifdef PNG_pHYs_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1728 | PNG_EXPORT(void,png_set_pHYs,(png_structp png_ptr, png_infop info_ptr, |
| 1729 | png_uint_32 res_x, png_uint_32 res_y, int unit_type),,150); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1730 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1731 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1732 | PNG_EXPORT(png_uint_32,png_get_PLTE,(png_structp png_ptr, png_infop info_ptr, |
| 1733 | png_colorp *palette, int *num_palette),,151); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1734 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1735 | PNG_EXPORT(void,png_set_PLTE,(png_structp png_ptr, png_infop info_ptr, |
| 1736 | png_colorp palette, int num_palette),,152); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1737 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1738 | #ifdef PNG_sBIT_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1739 | PNG_EXPORT(png_uint_32,png_get_sBIT,(png_structp png_ptr, png_infop info_ptr, |
| 1740 | png_color_8p *sig_bit),,153); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1741 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1742 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1743 | #ifdef PNG_sBIT_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1744 | PNG_EXPORT(void,png_set_sBIT,(png_structp png_ptr, png_infop info_ptr, |
| 1745 | png_color_8p sig_bit),,154); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1746 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1747 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1748 | #ifdef PNG_sRGB_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1749 | PNG_EXPORT(png_uint_32,png_get_sRGB,(png_structp png_ptr, png_infop info_ptr, |
| 1750 | int *intent),,155); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1751 | #endif |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 1752 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1753 | #ifdef PNG_sRGB_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1754 | PNG_EXPORT(void,png_set_sRGB,(png_structp png_ptr, png_infop info_ptr, |
| 1755 | int intent),,156); |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1756 | PNG_EXPORT(void,png_set_sRGB_gAMA_and_cHRM,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1757 | png_infop info_ptr, int intent),,157); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1758 | #endif |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 1759 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1760 | #ifdef PNG_iCCP_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1761 | PNG_EXPORT(png_uint_32,png_get_iCCP,(png_structp png_ptr, png_infop info_ptr, |
| 1762 | png_charpp name, int *compression_type, png_bytepp profile, |
| 1763 | png_uint_32 *proflen),,158); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1764 | #endif |
| 1765 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1766 | #ifdef PNG_iCCP_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1767 | PNG_EXPORT(void,png_set_iCCP,(png_structp png_ptr, png_infop info_ptr, |
| 1768 | png_charp name, int compression_type, png_bytep profile, |
| 1769 | png_uint_32 proflen),,159); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1770 | #endif |
| 1771 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1772 | #ifdef PNG_sPLT_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1773 | PNG_EXPORT(png_uint_32,png_get_sPLT,(png_structp png_ptr, png_infop info_ptr, |
| 1774 | png_sPLT_tpp entries),,160); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1775 | #endif |
| 1776 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1777 | #ifdef PNG_sPLT_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1778 | PNG_EXPORT(void,png_set_sPLT,(png_structp png_ptr, png_infop info_ptr, |
| 1779 | png_sPLT_tp entries, int nentries),,161); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1780 | #endif |
| 1781 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1782 | #ifdef PNG_TEXT_SUPPORTED |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1783 | /* png_get_text also returns the number of text chunks in *num_text */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1784 | PNG_EXPORT(png_uint_32,png_get_text,(png_structp png_ptr, png_infop info_ptr, |
| 1785 | png_textp *text_ptr, int *num_text),,162); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1786 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1787 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1788 | /* Note while png_set_text() will accept a structure whose text, |
| 1789 | * language, and translated keywords are NULL pointers, the structure |
| 1790 | * returned by png_get_text will always contain regular |
| 1791 | * zero-terminated C strings. They might be empty strings but |
| 1792 | * they will never be NULL pointers. |
Glenn Randers-Pehrson | 4accabb | 2000-04-14 14:20:47 -0500 | [diff] [blame] | 1793 | */ |
| 1794 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1795 | #ifdef PNG_TEXT_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1796 | PNG_EXPORT(void,png_set_text,(png_structp png_ptr, png_infop info_ptr, |
| 1797 | png_textp text_ptr, int num_text),,163); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1798 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1799 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1800 | #ifdef PNG_tIME_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1801 | PNG_EXPORT(png_uint_32,png_get_tIME,(png_structp png_ptr, png_infop info_ptr, |
| 1802 | png_timep *mod_time),,164); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1803 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1804 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1805 | #ifdef PNG_tIME_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1806 | PNG_EXPORT(void,png_set_tIME,(png_structp png_ptr, png_infop info_ptr, |
| 1807 | png_timep mod_time),,165); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1808 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1809 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1810 | #ifdef PNG_tRNS_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1811 | PNG_EXPORT(png_uint_32,png_get_tRNS,(png_structp png_ptr, png_infop info_ptr, |
| 1812 | png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color),,166); |
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 | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1815 | #ifdef PNG_tRNS_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1816 | PNG_EXPORT(void,png_set_tRNS,(png_structp png_ptr, png_infop info_ptr, |
| 1817 | png_bytep trans_alpha, int num_trans, png_color_16p trans_color),,167); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1818 | #endif |
| 1819 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1820 | #ifdef PNG_sCAL_SUPPORTED |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1821 | PNG_FP_EXPORT(png_uint_32,png_get_sCAL,(png_structp png_ptr, png_infop info_ptr, |
| 1822 | int *unit, double *width, double *height),,168); |
| 1823 | PNG_FIXED_EXPORT(png_uint_32,png_get_sCAL_fixed,(png_structp png_ptr, |
| 1824 | png_infop info_ptr, int *unit, png_fixed_point *width, |
| 1825 | png_fixed_point *height),,214); |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1826 | PNG_EXPORT(png_uint_32,png_get_sCAL_s,(png_structp png_ptr, |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1827 | png_infop info_ptr, int *unit, png_charpp swidth, png_charpp sheight),,169); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1828 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1829 | PNG_FP_EXPORT(void,png_set_sCAL,(png_structp png_ptr, png_infop info_ptr, |
| 1830 | int unit, double width, double height),,170); |
Glenn Randers-Pehrson | 1e7d7d3 | 2010-07-30 07:36:50 -0500 | [diff] [blame] | 1831 | #if 0 /* TO DO */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1832 | PNG_FIXED_EXPORT(void,png_set_sCAL_fixed,(png_structp png_ptr, |
| 1833 | png_infop info_ptr, int unit, png_fixed_point width, |
| 1834 | png_fixed_point height), ,213); |
Glenn Randers-Pehrson | 1e7d7d3 | 2010-07-30 07:36:50 -0500 | [diff] [blame] | 1835 | #endif |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1836 | PNG_EXPORT(void,png_set_sCAL_s,(png_structp png_ptr, png_infop info_ptr, |
| 1837 | int unit, png_charp swidth, png_charp sheight),,171); |
| 1838 | #endif /* PNG_sCAL_SUPPORTED */ |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1839 | |
Glenn Randers-Pehrson | 7824a70 | 2009-06-13 10:05:05 -0500 | [diff] [blame] | 1840 | #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED |
| 1841 | /* 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] | 1842 | handling or default unknown chunk handling is not desired. Any chunks not |
| 1843 | listed will be handled in the default manner. The IHDR and IEND chunks |
| 1844 | must not be listed. |
Glenn Randers-Pehrson | 145f5c8 | 2008-07-10 09:13:13 -0500 | [diff] [blame] | 1845 | keep = 0: follow default behaviour |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1846 | = 1: do not keep |
| 1847 | = 2: keep only if safe-to-copy |
| 1848 | = 3: keep even if unsafe-to-copy |
| 1849 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1850 | PNG_EXPORT(void, png_set_keep_unknown_chunks,(png_structp png_ptr, int keep, |
| 1851 | png_bytep chunk_list, int num_chunks),,172); |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1852 | PNG_EXPORT(int,png_handle_as_unknown,(png_structp png_ptr, |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1853 | png_const_bytep chunk_name),,173); |
Glenn Randers-Pehrson | 7824a70 | 2009-06-13 10:05:05 -0500 | [diff] [blame] | 1854 | #endif |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1855 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1856 | PNG_EXPORT(void, png_set_unknown_chunks,(png_structp png_ptr, |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1857 | png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns),,174); |
| 1858 | PNG_EXPORT(void, png_set_unknown_chunk_location, (png_structp png_ptr, |
| 1859 | png_infop info_ptr, int chunk, int location),,175); |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1860 | PNG_EXPORT(png_uint_32,png_get_unknown_chunks,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1861 | png_infop info_ptr, png_unknown_chunkpp entries),,176); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1862 | #endif |
| 1863 | |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1864 | /* Png_free_data() will turn off the "valid" flag for anything it frees. |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1865 | * If you need to turn it off for a chunk that your application has freed, |
| 1866 | * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); |
| 1867 | */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1868 | PNG_EXPORT(void, png_set_invalid,(png_structp png_ptr, png_infop info_ptr, |
| 1869 | int mask),,177); |
Glenn Randers-Pehrson | fc4a143 | 2000-05-17 17:39:34 -0500 | [diff] [blame] | 1870 | |
Glenn Randers-Pehrson | 4e6b5e9 | 2009-09-23 10:24:53 -0500 | [diff] [blame] | 1871 | #ifdef PNG_INFO_IMAGE_SUPPORTED |
Glenn Randers-Pehrson | 6942d53 | 2000-05-01 09:31:54 -0500 | [diff] [blame] | 1872 | /* The "params" pointer is currently not used and is for future expansion. */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1873 | PNG_EXPORT(void, png_read_png,(png_structp png_ptr, png_infop info_ptr, |
| 1874 | int transforms, png_voidp params),,178); |
| 1875 | PNG_EXPORT(void, png_write_png,(png_structp png_ptr, png_infop info_ptr, |
| 1876 | int transforms, png_voidp params),,179); |
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 | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1879 | PNG_EXPORT(png_charp,png_get_copyright,(png_structp png_ptr),,180); |
| 1880 | PNG_EXPORT(png_charp,png_get_header_ver,(png_structp png_ptr),,181); |
| 1881 | PNG_EXPORT(png_charp,png_get_header_version,(png_structp png_ptr),,182); |
| 1882 | PNG_EXPORT(png_charp,png_get_libpng_ver,(png_structp png_ptr),,183); |
Glenn Randers-Pehrson | c944229 | 1999-01-06 21:50:16 -0600 | [diff] [blame] | 1883 | |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 1884 | #ifdef PNG_MNG_FEATURES_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1885 | PNG_EXPORT(png_uint_32,png_permit_mng_features,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1886 | png_uint_32 mng_features_permitted),,184); |
Glenn Randers-Pehrson | 5e5c1e1 | 2000-11-10 12:26:19 -0600 | [diff] [blame] | 1887 | #endif |
| 1888 | |
Glenn Randers-Pehrson | 8f3dd83 | 2004-08-10 09:43:42 -0500 | [diff] [blame] | 1889 | /* For use in png_set_keep_unknown, added to version 1.2.6 */ |
| 1890 | #define PNG_HANDLE_CHUNK_AS_DEFAULT 0 |
| 1891 | #define PNG_HANDLE_CHUNK_NEVER 1 |
| 1892 | #define PNG_HANDLE_CHUNK_IF_SAFE 2 |
| 1893 | #define PNG_HANDLE_CHUNK_ALWAYS 3 |
| 1894 | |
Glenn Randers-Pehrson | e68f5a3 | 2001-05-14 09:20:53 -0500 | [diff] [blame] | 1895 | /* Strip the prepended error numbers ("#nnn ") from error and warning |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1896 | * messages before passing them to the error or warning handler. |
| 1897 | */ |
Glenn Randers-Pehrson | e68f5a3 | 2001-05-14 09:20:53 -0500 | [diff] [blame] | 1898 | #ifdef PNG_ERROR_NUMBERS_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1899 | PNG_EXPORT(void,png_set_strip_error_numbers,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1900 | png_uint_32 strip_mode),,185); |
Glenn Randers-Pehrson | be9de0f | 2001-01-22 08:52:16 -0600 | [diff] [blame] | 1901 | #endif |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 1902 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 1903 | /* Added in libpng-1.2.6 */ |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 1904 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1905 | PNG_EXPORT(void,png_set_user_limits,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1906 | png_uint_32 user_width_max, png_uint_32 user_height_max),,186); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1907 | PNG_EXPORT(png_uint_32,png_get_user_width_max,(png_structp png_ptr),,187); |
| 1908 | PNG_EXPORT(png_uint_32,png_get_user_height_max,(png_structp png_ptr),,188); |
Glenn Randers-Pehrson | 800d1e9 | 2008-08-20 17:25:21 -0500 | [diff] [blame] | 1909 | /* Added in libpng-1.4.0 */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1910 | PNG_EXPORT(void,png_set_chunk_cache_max,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1911 | png_uint_32 user_chunk_cache_max),,189); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1912 | PNG_EXPORT(png_uint_32,png_get_chunk_cache_max,(png_structp png_ptr),,190); |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1913 | /* Added in libpng-1.4.1 */ |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1914 | PNG_EXPORT(void,png_set_chunk_malloc_max,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1915 | png_alloc_size_t user_chunk_cache_max),,191); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1916 | PNG_EXPORT(png_alloc_size_t,png_get_chunk_malloc_max,(png_structp png_ptr),, |
| 1917 | 192); |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 1918 | #endif |
| 1919 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1920 | #if defined(PNG_INCH_CONVERSIONS_SUPPORTED) |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1921 | PNG_EXPORT(png_uint_32,png_get_pixels_per_inch,(png_structp png_ptr, |
| 1922 | png_infop info_ptr),,193); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1923 | |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1924 | PNG_EXPORT(png_uint_32,png_get_x_pixels_per_inch,(png_structp png_ptr, |
| 1925 | png_infop info_ptr),,194); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1926 | |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1927 | PNG_EXPORT(png_uint_32,png_get_y_pixels_per_inch,(png_structp png_ptr, |
| 1928 | png_infop info_ptr),,195); |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1929 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1930 | PNG_FP_EXPORT(float,png_get_x_offset_inches,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1931 | png_infop info_ptr),,196); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1932 | #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ |
| 1933 | PNG_FIXED_EXPORT(png_fixed_point,png_get_x_offset_inches_fixed, |
| 1934 | (png_structp png_ptr, png_infop info_ptr),,211); |
| 1935 | #endif |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1936 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1937 | PNG_FP_EXPORT(float,png_get_y_offset_inches,(png_structp png_ptr, |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1938 | png_infop info_ptr),,197); |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1939 | #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ |
| 1940 | PNG_FIXED_EXPORT(png_fixed_point,png_get_y_offset_inches_fixed, |
| 1941 | (png_structp png_ptr, png_infop info_ptr),,212); |
| 1942 | #endif |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1943 | |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 1944 | # ifdef PNG_pHYs_SUPPORTED |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1945 | PNG_EXPORT(png_uint_32,png_get_pHYs_dpi,(png_structp png_ptr, |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1946 | png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type), |
| 1947 | ,198); |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 1948 | # endif /* PNG_pHYs_SUPPORTED */ |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 1949 | #endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ |
Glenn Randers-Pehrson | 6bc53be | 2006-06-16 07:52:03 -0500 | [diff] [blame] | 1950 | |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 1951 | /* Added in libpng-1.4.0 */ |
| 1952 | #ifdef PNG_IO_STATE_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1953 | PNG_EXPORT(png_uint_32,png_get_io_state,(png_structp png_ptr),,199); |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 1954 | |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 1955 | PNG_EXPORT(png_bytep,png_get_io_chunk_name,(png_structp png_ptr),,200); |
Glenn Randers-Pehrson | beb572e | 2006-08-19 13:59:24 -0500 | [diff] [blame] | 1956 | |
| 1957 | /* The flags returned by png_get_io_state() are the following: */ |
Glenn Randers-Pehrson | d4df36c | 2010-03-06 10:45:55 -0600 | [diff] [blame] | 1958 | # define PNG_IO_NONE 0x0000 /* no I/O at this moment */ |
| 1959 | # define PNG_IO_READING 0x0001 /* currently reading */ |
| 1960 | # define PNG_IO_WRITING 0x0002 /* currently writing */ |
| 1961 | # define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */ |
| 1962 | # define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */ |
| 1963 | # define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */ |
| 1964 | # define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */ |
| 1965 | # define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */ |
| 1966 | # 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] | 1967 | #endif /* ?PNG_IO_STATE_SUPPORTED */ |
| 1968 | |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 1969 | #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED |
Glenn Randers-Pehrson | 8686fff | 1998-05-21 09:27:50 -0500 | [diff] [blame] | 1970 | /* With these routines we avoid an integer divide, which will be slower on |
| 1971 | * most machines. However, it does take more operations than the corresponding |
| 1972 | * 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] | 1973 | * shifts (by 8 or 16 bits) and an addition, versus a single integer divide. |
| 1974 | * |
| 1975 | * Note that the rounding factors are NOT supposed to be the same! 128 and |
| 1976 | * 32768 are correct for the NODIV code; 127 and 32767 are correct for the |
| 1977 | * standard method. |
| 1978 | * |
| 1979 | * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ] |
| 1980 | */ |
| 1981 | |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 1982 | /* 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] | 1983 | |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1984 | # define png_composite(composite, fg, alpha, bg) \ |
| 1985 | { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \ |
| 1986 | * (png_uint_16)(alpha) \ |
| 1987 | + (png_uint_16)(bg)*(png_uint_16)(255 \ |
| 1988 | - (png_uint_16)(alpha)) + (png_uint_16)128); \ |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 1989 | (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 1990 | |
Glenn Randers-Pehrson | e3f3c4e | 2010-02-07 18:08:50 -0600 | [diff] [blame] | 1991 | # define png_composite_16(composite, fg, alpha, bg) \ |
| 1992 | { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \ |
| 1993 | * (png_uint_32)(alpha) \ |
| 1994 | + (png_uint_32)(bg)*(png_uint_32)(65535L \ |
| 1995 | - (png_uint_32)(alpha)) + (png_uint_32)32768L); \ |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 1996 | (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } |
| 1997 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 1998 | #else /* Standard method using integer division */ |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 1999 | |
Glenn Randers-Pehrson | eae8e36 | 2010-03-12 17:36:53 -0600 | [diff] [blame] | 2000 | # define png_composite(composite, fg, alpha, bg) \ |
| 2001 | (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ |
Glenn Randers-Pehrson | e8b1aa0 | 2010-03-06 11:39:29 -0600 | [diff] [blame] | 2002 | (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ |
| 2003 | (png_uint_16)127) / 255) |
Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 2004 | |
| 2005 | # define png_composite_16(composite, fg, alpha, bg) \ |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 2006 | (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] | 2007 | (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] | 2008 | (png_uint_32)32767) / (png_uint_32)65535L) |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 2009 | #endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ |
| 2010 | |
Glenn Randers-Pehrson | eb58091 | 2008-07-30 14:47:09 -0500 | [diff] [blame] | 2011 | #ifdef PNG_USE_READ_MACROS |
| 2012 | /* Inline macros to do direct reads of bytes from the input buffer. |
| 2013 | * The png_get_int_32() routine assumes we are using two's complement |
| 2014 | * format for negative values, which is almost certainly true. |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 2015 | */ |
Glenn Randers-Pehrson | eb58091 | 2008-07-30 14:47:09 -0500 | [diff] [blame] | 2016 | # define png_get_uint_32(buf) \ |
| 2017 | (((png_uint_32)(*(buf)) << 24) + \ |
| 2018 | ((png_uint_32)(*((buf) + 1)) << 16) + \ |
| 2019 | ((png_uint_32)(*((buf) + 2)) << 8) + \ |
| 2020 | ((png_uint_32)(*((buf) + 3)))) |
| 2021 | # define png_get_uint_16(buf) \ |
| 2022 | (((png_uint_32)(*(buf)) << 8) + \ |
| 2023 | ((png_uint_32)(*((buf) + 1)))) |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 2024 | # define png_get_int_32(buf) \ |
| 2025 | ((png_int_32)((*(buf) & 0x80) \ |
Glenn Randers-Pehrson | dd80757 | 2010-07-30 14:35:50 -0500 | [diff] [blame] | 2026 | ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffff)+1)) \ |
| 2027 | : (png_int_32)png_get_uint_32(buf))) |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 2028 | #endif |
Glenn Randers-Pehrson | c3d73f4 | 2010-04-24 09:18:57 -0500 | [diff] [blame] | 2029 | |
| 2030 | #ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 2031 | PNG_EXPORT(png_uint_32,png_get_uint_32,(png_bytep buf),,201); |
| 2032 | PNG_EXPORT(png_uint_16,png_get_uint_16,(png_bytep buf),,202); |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 2033 | PNG_EXPORT(png_int_32,png_get_int_32,(png_bytep buf),,203); |
Glenn Randers-Pehrson | c3d73f4 | 2010-04-24 09:18:57 -0500 | [diff] [blame] | 2034 | #endif |
| 2035 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 2036 | PNG_EXPORT(png_uint_32,png_get_uint_31,(png_structp png_ptr, png_bytep buf),, |
| 2037 | 204); |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 2038 | /* No png_get_int_16 -- may be added if there's a real need for it. */ |
| 2039 | |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 2040 | /* 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] | 2041 | #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 2042 | PNG_EXPORT(void,png_save_uint_32,(png_bytep buf, png_uint_32 i),,205); |
Glenn Randers-Pehrson | c3d73f4 | 2010-04-24 09:18:57 -0500 | [diff] [blame] | 2043 | #endif |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 2044 | #ifdef PNG_SAVE_INT_32_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 2045 | PNG_EXPORT(void,png_save_int_32,(png_bytep buf, png_int_32 i),,206); |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 2046 | #endif |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 2047 | |
| 2048 | /* Place a 16-bit number into a buffer in PNG byte order. |
| 2049 | * The parameter is declared unsigned int, not png_uint_16, |
| 2050 | * just to avoid potential problems on pre-ANSI C compilers. |
| 2051 | */ |
Glenn Randers-Pehrson | c3d73f4 | 2010-04-24 09:18:57 -0500 | [diff] [blame] | 2052 | #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED |
Glenn Randers-Pehrson | aa4e359 | 2010-07-06 07:40:47 -0500 | [diff] [blame] | 2053 | PNG_EXPORT(void,png_save_uint_16,(png_bytep buf, unsigned int i),,207); |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 2054 | /* 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] | 2055 | #endif |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 2056 | |
Glenn Randers-Pehrson | 31aee0d | 2010-07-29 17:39:14 -0500 | [diff] [blame] | 2057 | /* Maintainer: Put new public prototypes here ^, in libpng.3, and project |
| 2058 | * defs |
| 2059 | */ |
| 2060 | |
Glenn Randers-Pehrson | c551c0d | 2010-03-16 07:52:34 -0500 | [diff] [blame] | 2061 | /* The last ordinal number (this is the *last* one, the next one to |
| 2062 | * use is one more than this.) |
| 2063 | */ |
| 2064 | #ifdef PNG_EXPORT_LAST_ORDINAL |
Glenn Randers-Pehrson | 2be8b64 | 2010-07-29 19:09:18 -0500 | [diff] [blame] | 2065 | PNG_EXPORT_LAST_ORDINAL(218); |
Glenn Randers-Pehrson | c551c0d | 2010-03-16 07:52:34 -0500 | [diff] [blame] | 2066 | #endif |
| 2067 | |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 2068 | #ifdef __cplusplus |
| 2069 | } |
| 2070 | #endif |
| 2071 | |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 2072 | #endif /* PNG_VERSION_INFO_ONLY */ |
Glenn Randers-Pehrson | 6c7a09a | 2009-06-15 21:57:39 -0500 | [diff] [blame] | 2073 | /* Do not put anything past this line */ |
Glenn Randers-Pehrson | 1394480 | 2000-06-24 07:42:42 -0500 | [diff] [blame] | 2074 | #endif /* PNG_H */ |