diff options
author | David Walter Seikel | 2013-01-13 18:54:10 +1000 |
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committer | David Walter Seikel | 2013-01-13 18:54:10 +1000 |
commit | 959831f4ef5a3e797f576c3de08cd65032c997ad (patch) | |
tree | e7351908be5995f0b325b2ebeaa02d5a34b82583 /libraries/irrlicht-1.8/source/Irrlicht/libpng/png.h | |
parent | Add info about changes to Irrlicht. (diff) | |
download | SledjHamr-959831f4ef5a3e797f576c3de08cd65032c997ad.zip SledjHamr-959831f4ef5a3e797f576c3de08cd65032c997ad.tar.gz SledjHamr-959831f4ef5a3e797f576c3de08cd65032c997ad.tar.bz2 SledjHamr-959831f4ef5a3e797f576c3de08cd65032c997ad.tar.xz |
Remove damned ancient DOS line endings from Irrlicht. Hopefully I did not go overboard.
Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/libpng/png.h')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/libpng/png.h | 5316 |
1 files changed, 2658 insertions, 2658 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/libpng/png.h b/libraries/irrlicht-1.8/source/Irrlicht/libpng/png.h index 8126767..5617c97 100644 --- a/libraries/irrlicht-1.8/source/Irrlicht/libpng/png.h +++ b/libraries/irrlicht-1.8/source/Irrlicht/libpng/png.h | |||
@@ -1,2658 +1,2658 @@ | |||
1 | 1 | ||
2 | /* png.h - header file for PNG reference library | 2 | /* png.h - header file for PNG reference library |
3 | * | 3 | * |
4 | * libpng version 1.5.9 - February 18, 2012 | 4 | * libpng version 1.5.9 - February 18, 2012 |
5 | * Copyright (c) 1998-2012 Glenn Randers-Pehrson | 5 | * Copyright (c) 1998-2012 Glenn Randers-Pehrson |
6 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) | 6 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
7 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) | 7 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
8 | * | 8 | * |
9 | * This code is released under the libpng license (See LICENSE, below) | 9 | * This code is released under the libpng license (See LICENSE, below) |
10 | * | 10 | * |
11 | * Authors and maintainers: | 11 | * Authors and maintainers: |
12 | * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat | 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 | 13 | * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger |
14 | * libpng versions 0.97, January 1998, through 1.5.9 - February 18, 2012: Glenn | 14 | * libpng versions 0.97, January 1998, through 1.5.9 - February 18, 2012: Glenn |
15 | * See also "Contributing Authors", below. | 15 | * See also "Contributing Authors", below. |
16 | * | 16 | * |
17 | * Note about libpng version numbers: | 17 | * Note about libpng version numbers: |
18 | * | 18 | * |
19 | * Due to various miscommunications, unforeseen code incompatibilities | 19 | * Due to various miscommunications, unforeseen code incompatibilities |
20 | * and occasional factors outside the authors' control, version numbering | 20 | * and occasional factors outside the authors' control, version numbering |
21 | * on the library has not always been consistent and straightforward. | 21 | * on the library has not always been consistent and straightforward. |
22 | * The following table summarizes matters since version 0.89c, which was | 22 | * The following table summarizes matters since version 0.89c, which was |
23 | * the first widely used release: | 23 | * the first widely used release: |
24 | * | 24 | * |
25 | * source png.h png.h shared-lib | 25 | * source png.h png.h shared-lib |
26 | * version string int version | 26 | * version string int version |
27 | * ------- ------ ----- ---------- | 27 | * ------- ------ ----- ---------- |
28 | * 0.89c "1.0 beta 3" 0.89 89 1.0.89 | 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] | 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] | 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] | 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] | 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 | 33 | * 0.97c 0.97 97 2.0.97 |
34 | * 0.98 0.98 98 2.0.98 | 34 | * 0.98 0.98 98 2.0.98 |
35 | * 0.99 0.99 98 2.0.99 | 35 | * 0.99 0.99 98 2.0.99 |
36 | * 0.99a-m 0.99 99 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] | 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] | 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 | 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 | 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 | 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. | 42 | * 1.0.2a-b 10003 version, except as noted. |
43 | * 1.0.3 10003 | 43 | * 1.0.3 10003 |
44 | * 1.0.3a-d 10004 | 44 | * 1.0.3a-d 10004 |
45 | * 1.0.4 10004 | 45 | * 1.0.4 10004 |
46 | * 1.0.4a-f 10005 | 46 | * 1.0.4a-f 10005 |
47 | * 1.0.5 (+ 2 patches) 10005 | 47 | * 1.0.5 (+ 2 patches) 10005 |
48 | * 1.0.5a-d 10006 | 48 | * 1.0.5a-d 10006 |
49 | * 1.0.5e-r 10100 (not source compatible) | 49 | * 1.0.5e-r 10100 (not source compatible) |
50 | * 1.0.5s-v 10006 (not binary compatible) | 50 | * 1.0.5s-v 10006 (not binary compatible) |
51 | * 1.0.6 (+ 3 patches) 10006 (still binary incompatible) | 51 | * 1.0.6 (+ 3 patches) 10006 (still binary incompatible) |
52 | * 1.0.6d-f 10007 (still binary incompatible) | 52 | * 1.0.6d-f 10007 (still binary incompatible) |
53 | * 1.0.6g 10007 | 53 | * 1.0.6g 10007 |
54 | * 1.0.6h 10007 10.6h (testing xy.z so-numbering) | 54 | * 1.0.6h 10007 10.6h (testing xy.z so-numbering) |
55 | * 1.0.6i 10007 10.6i | 55 | * 1.0.6i 10007 10.6i |
56 | * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0) | 56 | * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0) |
57 | * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible) | 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) | 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) | 59 | * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible) |
60 | * 1.0.7 1 10007 (still compatible) | 60 | * 1.0.7 1 10007 (still compatible) |
61 | * 1.0.8beta1-4 1 10008 2.1.0.8beta1-4 | 61 | * 1.0.8beta1-4 1 10008 2.1.0.8beta1-4 |
62 | * 1.0.8rc1 1 10008 2.1.0.8rc1 | 62 | * 1.0.8rc1 1 10008 2.1.0.8rc1 |
63 | * 1.0.8 1 10008 2.1.0.8 | 63 | * 1.0.8 1 10008 2.1.0.8 |
64 | * 1.0.9beta1-6 1 10009 2.1.0.9beta1-6 | 64 | * 1.0.9beta1-6 1 10009 2.1.0.9beta1-6 |
65 | * 1.0.9rc1 1 10009 2.1.0.9rc1 | 65 | * 1.0.9rc1 1 10009 2.1.0.9rc1 |
66 | * 1.0.9beta7-10 1 10009 2.1.0.9beta7-10 | 66 | * 1.0.9beta7-10 1 10009 2.1.0.9beta7-10 |
67 | * 1.0.9rc2 1 10009 2.1.0.9rc2 | 67 | * 1.0.9rc2 1 10009 2.1.0.9rc2 |
68 | * 1.0.9 1 10009 2.1.0.9 | 68 | * 1.0.9 1 10009 2.1.0.9 |
69 | * 1.0.10beta1 1 10010 2.1.0.10beta1 | 69 | * 1.0.10beta1 1 10010 2.1.0.10beta1 |
70 | * 1.0.10rc1 1 10010 2.1.0.10rc1 | 70 | * 1.0.10rc1 1 10010 2.1.0.10rc1 |
71 | * 1.0.10 1 10010 2.1.0.10 | 71 | * 1.0.10 1 10010 2.1.0.10 |
72 | * 1.0.11beta1-3 1 10011 2.1.0.11beta1-3 | 72 | * 1.0.11beta1-3 1 10011 2.1.0.11beta1-3 |
73 | * 1.0.11rc1 1 10011 2.1.0.11rc1 | 73 | * 1.0.11rc1 1 10011 2.1.0.11rc1 |
74 | * 1.0.11 1 10011 2.1.0.11 | 74 | * 1.0.11 1 10011 2.1.0.11 |
75 | * 1.0.12beta1-2 2 10012 2.1.0.12beta1-2 | 75 | * 1.0.12beta1-2 2 10012 2.1.0.12beta1-2 |
76 | * 1.0.12rc1 2 10012 2.1.0.12rc1 | 76 | * 1.0.12rc1 2 10012 2.1.0.12rc1 |
77 | * 1.0.12 2 10012 2.1.0.12 | 77 | * 1.0.12 2 10012 2.1.0.12 |
78 | * 1.1.0a-f - 10100 2.1.1.0a-f (branch abandoned) | 78 | * 1.1.0a-f - 10100 2.1.1.0a-f (branch abandoned) |
79 | * 1.2.0beta1-2 2 10200 2.1.2.0beta1-2 | 79 | * 1.2.0beta1-2 2 10200 2.1.2.0beta1-2 |
80 | * 1.2.0beta3-5 3 10200 3.1.2.0beta3-5 | 80 | * 1.2.0beta3-5 3 10200 3.1.2.0beta3-5 |
81 | * 1.2.0rc1 3 10200 3.1.2.0rc1 | 81 | * 1.2.0rc1 3 10200 3.1.2.0rc1 |
82 | * 1.2.0 3 10200 3.1.2.0 | 82 | * 1.2.0 3 10200 3.1.2.0 |
83 | * 1.2.1beta1-4 3 10201 3.1.2.1beta1-4 | 83 | * 1.2.1beta1-4 3 10201 3.1.2.1beta1-4 |
84 | * 1.2.1rc1-2 3 10201 3.1.2.1rc1-2 | 84 | * 1.2.1rc1-2 3 10201 3.1.2.1rc1-2 |
85 | * 1.2.1 3 10201 3.1.2.1 | 85 | * 1.2.1 3 10201 3.1.2.1 |
86 | * 1.2.2beta1-6 12 10202 12.so.0.1.2.2beta1-6 | 86 | * 1.2.2beta1-6 12 10202 12.so.0.1.2.2beta1-6 |
87 | * 1.0.13beta1 10 10013 10.so.0.1.0.13beta1 | 87 | * 1.0.13beta1 10 10013 10.so.0.1.0.13beta1 |
88 | * 1.0.13rc1 10 10013 10.so.0.1.0.13rc1 | 88 | * 1.0.13rc1 10 10013 10.so.0.1.0.13rc1 |
89 | * 1.2.2rc1 12 10202 12.so.0.1.2.2rc1 | 89 | * 1.2.2rc1 12 10202 12.so.0.1.2.2rc1 |
90 | * 1.0.13 10 10013 10.so.0.1.0.13 | 90 | * 1.0.13 10 10013 10.so.0.1.0.13 |
91 | * 1.2.2 12 10202 12.so.0.1.2.2 | 91 | * 1.2.2 12 10202 12.so.0.1.2.2 |
92 | * 1.2.3rc1-6 12 10203 12.so.0.1.2.3rc1-6 | 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 | 93 | * 1.2.3 12 10203 12.so.0.1.2.3 |
94 | * 1.2.4beta1-3 13 10204 12.so.0.1.2.4beta1-3 | 94 | * 1.2.4beta1-3 13 10204 12.so.0.1.2.4beta1-3 |
95 | * 1.0.14rc1 13 10014 10.so.0.1.0.14rc1 | 95 | * 1.0.14rc1 13 10014 10.so.0.1.0.14rc1 |
96 | * 1.2.4rc1 13 10204 12.so.0.1.2.4rc1 | 96 | * 1.2.4rc1 13 10204 12.so.0.1.2.4rc1 |
97 | * 1.0.14 10 10014 10.so.0.1.0.14 | 97 | * 1.0.14 10 10014 10.so.0.1.0.14 |
98 | * 1.2.4 13 10204 12.so.0.1.2.4 | 98 | * 1.2.4 13 10204 12.so.0.1.2.4 |
99 | * 1.2.5beta1-2 13 10205 12.so.0.1.2.5beta1-2 | 99 | * 1.2.5beta1-2 13 10205 12.so.0.1.2.5beta1-2 |
100 | * 1.0.15rc1-3 10 10015 10.so.0.1.0.15rc1-3 | 100 | * 1.0.15rc1-3 10 10015 10.so.0.1.0.15rc1-3 |
101 | * 1.2.5rc1-3 13 10205 12.so.0.1.2.5rc1-3 | 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 | 102 | * 1.0.15 10 10015 10.so.0.1.0.15 |
103 | * 1.2.5 13 10205 12.so.0.1.2.5 | 103 | * 1.2.5 13 10205 12.so.0.1.2.5 |
104 | * 1.2.6beta1-4 13 10206 12.so.0.1.2.6beta1-4 | 104 | * 1.2.6beta1-4 13 10206 12.so.0.1.2.6beta1-4 |
105 | * 1.0.16 10 10016 10.so.0.1.0.16 | 105 | * 1.0.16 10 10016 10.so.0.1.0.16 |
106 | * 1.2.6 13 10206 12.so.0.1.2.6 | 106 | * 1.2.6 13 10206 12.so.0.1.2.6 |
107 | * 1.2.7beta1-2 13 10207 12.so.0.1.2.7beta1-2 | 107 | * 1.2.7beta1-2 13 10207 12.so.0.1.2.7beta1-2 |
108 | * 1.0.17rc1 10 10017 12.so.0.1.0.17rc1 | 108 | * 1.0.17rc1 10 10017 12.so.0.1.0.17rc1 |
109 | * 1.2.7rc1 13 10207 12.so.0.1.2.7rc1 | 109 | * 1.2.7rc1 13 10207 12.so.0.1.2.7rc1 |
110 | * 1.0.17 10 10017 12.so.0.1.0.17 | 110 | * 1.0.17 10 10017 12.so.0.1.0.17 |
111 | * 1.2.7 13 10207 12.so.0.1.2.7 | 111 | * 1.2.7 13 10207 12.so.0.1.2.7 |
112 | * 1.2.8beta1-5 13 10208 12.so.0.1.2.8beta1-5 | 112 | * 1.2.8beta1-5 13 10208 12.so.0.1.2.8beta1-5 |
113 | * 1.0.18rc1-5 10 10018 12.so.0.1.0.18rc1-5 | 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 | 114 | * 1.2.8rc1-5 13 10208 12.so.0.1.2.8rc1-5 |
115 | * 1.0.18 10 10018 12.so.0.1.0.18 | 115 | * 1.0.18 10 10018 12.so.0.1.0.18 |
116 | * 1.2.8 13 10208 12.so.0.1.2.8 | 116 | * 1.2.8 13 10208 12.so.0.1.2.8 |
117 | * 1.2.9beta1-3 13 10209 12.so.0.1.2.9beta1-3 | 117 | * 1.2.9beta1-3 13 10209 12.so.0.1.2.9beta1-3 |
118 | * 1.2.9beta4-11 13 10209 12.so.0.9[.0] | 118 | * 1.2.9beta4-11 13 10209 12.so.0.9[.0] |
119 | * 1.2.9rc1 13 10209 12.so.0.9[.0] | 119 | * 1.2.9rc1 13 10209 12.so.0.9[.0] |
120 | * 1.2.9 13 10209 12.so.0.9[.0] | 120 | * 1.2.9 13 10209 12.so.0.9[.0] |
121 | * 1.2.10beta1-7 13 10210 12.so.0.10[.0] | 121 | * 1.2.10beta1-7 13 10210 12.so.0.10[.0] |
122 | * 1.2.10rc1-2 13 10210 12.so.0.10[.0] | 122 | * 1.2.10rc1-2 13 10210 12.so.0.10[.0] |
123 | * 1.2.10 13 10210 12.so.0.10[.0] | 123 | * 1.2.10 13 10210 12.so.0.10[.0] |
124 | * 1.4.0beta1-5 14 10400 14.so.0.0[.0] | 124 | * 1.4.0beta1-5 14 10400 14.so.0.0[.0] |
125 | * 1.2.11beta1-4 13 10211 12.so.0.11[.0] | 125 | * 1.2.11beta1-4 13 10211 12.so.0.11[.0] |
126 | * 1.4.0beta7-8 14 10400 14.so.0.0[.0] | 126 | * 1.4.0beta7-8 14 10400 14.so.0.0[.0] |
127 | * 1.2.11 13 10211 12.so.0.11[.0] | 127 | * 1.2.11 13 10211 12.so.0.11[.0] |
128 | * 1.2.12 13 10212 12.so.0.12[.0] | 128 | * 1.2.12 13 10212 12.so.0.12[.0] |
129 | * 1.4.0beta9-14 14 10400 14.so.0.0[.0] | 129 | * 1.4.0beta9-14 14 10400 14.so.0.0[.0] |
130 | * 1.2.13 13 10213 12.so.0.13[.0] | 130 | * 1.2.13 13 10213 12.so.0.13[.0] |
131 | * 1.4.0beta15-36 14 10400 14.so.0.0[.0] | 131 | * 1.4.0beta15-36 14 10400 14.so.0.0[.0] |
132 | * 1.4.0beta37-87 14 10400 14.so.14.0[.0] | 132 | * 1.4.0beta37-87 14 10400 14.so.14.0[.0] |
133 | * 1.4.0rc01 14 10400 14.so.14.0[.0] | 133 | * 1.4.0rc01 14 10400 14.so.14.0[.0] |
134 | * 1.4.0beta88-109 14 10400 14.so.14.0[.0] | 134 | * 1.4.0beta88-109 14 10400 14.so.14.0[.0] |
135 | * 1.4.0rc02-08 14 10400 14.so.14.0[.0] | 135 | * 1.4.0rc02-08 14 10400 14.so.14.0[.0] |
136 | * 1.4.0 14 10400 14.so.14.0[.0] | 136 | * 1.4.0 14 10400 14.so.14.0[.0] |
137 | * 1.4.1beta01-03 14 10401 14.so.14.1[.0] | 137 | * 1.4.1beta01-03 14 10401 14.so.14.1[.0] |
138 | * 1.4.1rc01 14 10401 14.so.14.1[.0] | 138 | * 1.4.1rc01 14 10401 14.so.14.1[.0] |
139 | * 1.4.1beta04-12 14 10401 14.so.14.1[.0] | 139 | * 1.4.1beta04-12 14 10401 14.so.14.1[.0] |
140 | * 1.4.1 14 10401 14.so.14.1[.0] | 140 | * 1.4.1 14 10401 14.so.14.1[.0] |
141 | * 1.4.2 14 10402 14.so.14.2[.0] | 141 | * 1.4.2 14 10402 14.so.14.2[.0] |
142 | * 1.4.3 14 10403 14.so.14.3[.0] | 142 | * 1.4.3 14 10403 14.so.14.3[.0] |
143 | * 1.4.4 14 10404 14.so.14.4[.0] | 143 | * 1.4.4 14 10404 14.so.14.4[.0] |
144 | * 1.5.0beta01-58 15 10500 15.so.15.0[.0] | 144 | * 1.5.0beta01-58 15 10500 15.so.15.0[.0] |
145 | * 1.5.0rc01-07 15 10500 15.so.15.0[.0] | 145 | * 1.5.0rc01-07 15 10500 15.so.15.0[.0] |
146 | * 1.5.0 15 10500 15.so.15.0[.0] | 146 | * 1.5.0 15 10500 15.so.15.0[.0] |
147 | * 1.5.1beta01-11 15 10501 15.so.15.1[.0] | 147 | * 1.5.1beta01-11 15 10501 15.so.15.1[.0] |
148 | * 1.5.1rc01-02 15 10501 15.so.15.1[.0] | 148 | * 1.5.1rc01-02 15 10501 15.so.15.1[.0] |
149 | * 1.5.1 15 10501 15.so.15.1[.0] | 149 | * 1.5.1 15 10501 15.so.15.1[.0] |
150 | * 1.5.2beta01-03 15 10502 15.so.15.2[.0] | 150 | * 1.5.2beta01-03 15 10502 15.so.15.2[.0] |
151 | * 1.5.2rc01-03 15 10502 15.so.15.2[.0] | 151 | * 1.5.2rc01-03 15 10502 15.so.15.2[.0] |
152 | * 1.5.2 15 10502 15.so.15.2[.0] | 152 | * 1.5.2 15 10502 15.so.15.2[.0] |
153 | * 1.5.3beta01-10 15 10503 15.so.15.3[.0] | 153 | * 1.5.3beta01-10 15 10503 15.so.15.3[.0] |
154 | * 1.5.3rc01-02 15 10503 15.so.15.3[.0] | 154 | * 1.5.3rc01-02 15 10503 15.so.15.3[.0] |
155 | * 1.5.3beta11 15 10503 15.so.15.3[.0] | 155 | * 1.5.3beta11 15 10503 15.so.15.3[.0] |
156 | * 1.5.3 [omitted] | 156 | * 1.5.3 [omitted] |
157 | * 1.5.4beta01-08 15 10504 15.so.15.4[.0] | 157 | * 1.5.4beta01-08 15 10504 15.so.15.4[.0] |
158 | * 1.5.4rc01 15 10504 15.so.15.4[.0] | 158 | * 1.5.4rc01 15 10504 15.so.15.4[.0] |
159 | * 1.5.4 15 10504 15.so.15.4[.0] | 159 | * 1.5.4 15 10504 15.so.15.4[.0] |
160 | * 1.5.5beta01-08 15 10505 15.so.15.5[.0] | 160 | * 1.5.5beta01-08 15 10505 15.so.15.5[.0] |
161 | * 1.5.5rc01 15 10505 15.so.15.5[.0] | 161 | * 1.5.5rc01 15 10505 15.so.15.5[.0] |
162 | * 1.5.5 15 10505 15.so.15.5[.0] | 162 | * 1.5.5 15 10505 15.so.15.5[.0] |
163 | * 1.5.6beta01-07 15 10506 15.so.15.6[.0] | 163 | * 1.5.6beta01-07 15 10506 15.so.15.6[.0] |
164 | * 1.5.6rc01-03 15 10506 15.so.15.6[.0] | 164 | * 1.5.6rc01-03 15 10506 15.so.15.6[.0] |
165 | * 1.5.6 15 10506 15.so.15.6[.0] | 165 | * 1.5.6 15 10506 15.so.15.6[.0] |
166 | * 1.5.7beta01-05 15 10507 15.so.15.7[.0] | 166 | * 1.5.7beta01-05 15 10507 15.so.15.7[.0] |
167 | * 1.5.7rc01-03 15 10507 15.so.15.7[.0] | 167 | * 1.5.7rc01-03 15 10507 15.so.15.7[.0] |
168 | * 1.5.7 15 10507 15.so.15.7[.0] | 168 | * 1.5.7 15 10507 15.so.15.7[.0] |
169 | * 1.5.8beta01 15 10508 15.so.15.8[.0] | 169 | * 1.5.8beta01 15 10508 15.so.15.8[.0] |
170 | * 1.5.8rc01 15 10508 15.so.15.8[.0] | 170 | * 1.5.8rc01 15 10508 15.so.15.8[.0] |
171 | * 1.5.8 15 10508 15.so.15.8[.0] | 171 | * 1.5.8 15 10508 15.so.15.8[.0] |
172 | * 1.5.9beta01-02 15 10509 15.so.15.9[.0] | 172 | * 1.5.9beta01-02 15 10509 15.so.15.9[.0] |
173 | * 1.5.9rc01 15 10509 15.so.15.9[.0] | 173 | * 1.5.9rc01 15 10509 15.so.15.9[.0] |
174 | * 1.5.9 15 10509 15.so.15.9[.0] | 174 | * 1.5.9 15 10509 15.so.15.9[.0] |
175 | * | 175 | * |
176 | * Henceforth the source version will match the shared-library major | 176 | * Henceforth the source version will match the shared-library major |
177 | * and minor numbers; the shared-library major version number will be | 177 | * and minor numbers; the shared-library major version number will be |
178 | * used for changes in backward compatibility, as it is intended. The | 178 | * used for changes in backward compatibility, as it is intended. The |
179 | * PNG_LIBPNG_VER macro, which is not used within libpng but is available | 179 | * PNG_LIBPNG_VER macro, which is not used within libpng but is available |
180 | * for applications, is an unsigned integer of the form xyyzz corresponding | 180 | * for applications, is an unsigned integer of the form xyyzz corresponding |
181 | * to the source version x.y.z (leading zeros in y and z). Beta versions | 181 | * to the source version x.y.z (leading zeros in y and z). Beta versions |
182 | * were given the previous public release number plus a letter, until | 182 | * were given the previous public release number plus a letter, until |
183 | * version 1.0.6j; from then on they were given the upcoming public | 183 | * version 1.0.6j; from then on they were given the upcoming public |
184 | * release number plus "betaNN" or "rcN". | 184 | * release number plus "betaNN" or "rcN". |
185 | * | 185 | * |
186 | * Binary incompatibility exists only when applications make direct access | 186 | * Binary incompatibility exists only when applications make direct access |
187 | * to the info_ptr or png_ptr members through png.h, and the compiled | 187 | * to the info_ptr or png_ptr members through png.h, and the compiled |
188 | * application is loaded with a different version of the library. | 188 | * application is loaded with a different version of the library. |
189 | * | 189 | * |
190 | * DLLNUM will change each time there are forward or backward changes | 190 | * DLLNUM will change each time there are forward or backward changes |
191 | * in binary compatibility (e.g., when a new feature is added). | 191 | * in binary compatibility (e.g., when a new feature is added). |
192 | * | 192 | * |
193 | * See libpng-manual.txt or libpng.3 for more information. The PNG | 193 | * See libpng-manual.txt or libpng.3 for more information. The PNG |
194 | * specification is available as a W3C Recommendation and as an ISO | 194 | * specification is available as a W3C Recommendation and as an ISO |
195 | * Specification, <http://www.w3.org/TR/2003/REC-PNG-20031110/ | 195 | * Specification, <http://www.w3.org/TR/2003/REC-PNG-20031110/ |
196 | */ | 196 | */ |
197 | 197 | ||
198 | /* | 198 | /* |
199 | * COPYRIGHT NOTICE, DISCLAIMER, and LICENSE: | 199 | * COPYRIGHT NOTICE, DISCLAIMER, and LICENSE: |
200 | * | 200 | * |
201 | * If you modify libpng you may insert additional notices immediately following | 201 | * If you modify libpng you may insert additional notices immediately following |
202 | * this sentence. | 202 | * this sentence. |
203 | * | 203 | * |
204 | * This code is released under the libpng license. | 204 | * This code is released under the libpng license. |
205 | * | 205 | * |
206 | * libpng versions 1.2.6, August 15, 2004, through 1.5.9, February 18, 2012, are | 206 | * libpng versions 1.2.6, August 15, 2004, through 1.5.9, February 18, 2012, are |
207 | * Copyright (c) 2004, 2006-2012 Glenn Randers-Pehrson, and are | 207 | * Copyright (c) 2004, 2006-2012 Glenn Randers-Pehrson, and are |
208 | * distributed according to the same disclaimer and license as libpng-1.2.5 | 208 | * distributed according to the same disclaimer and license as libpng-1.2.5 |
209 | * with the following individual added to the list of Contributing Authors: | 209 | * with the following individual added to the list of Contributing Authors: |
210 | * | 210 | * |
211 | * Cosmin Truta | 211 | * Cosmin Truta |
212 | * | 212 | * |
213 | * libpng versions 1.0.7, July 1, 2000, through 1.2.5, October 3, 2002, are | 213 | * libpng versions 1.0.7, July 1, 2000, through 1.2.5, October 3, 2002, are |
214 | * Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are | 214 | * Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are |
215 | * distributed according to the same disclaimer and license as libpng-1.0.6 | 215 | * distributed according to the same disclaimer and license as libpng-1.0.6 |
216 | * with the following individuals added to the list of Contributing Authors: | 216 | * with the following individuals added to the list of Contributing Authors: |
217 | * | 217 | * |
218 | * Simon-Pierre Cadieux | 218 | * Simon-Pierre Cadieux |
219 | * Eric S. Raymond | 219 | * Eric S. Raymond |
220 | * Gilles Vollant | 220 | * Gilles Vollant |
221 | * | 221 | * |
222 | * and with the following additions to the disclaimer: | 222 | * and with the following additions to the disclaimer: |
223 | * | 223 | * |
224 | * There is no warranty against interference with your enjoyment of the | 224 | * There is no warranty against interference with your enjoyment of the |
225 | * library or against infringement. There is no warranty that our | 225 | * library or against infringement. There is no warranty that our |
226 | * efforts or the library will fulfill any of your particular purposes | 226 | * efforts or the library will fulfill any of your particular purposes |
227 | * or needs. This library is provided with all faults, and the entire | 227 | * or needs. This library is provided with all faults, and the entire |
228 | * risk of satisfactory quality, performance, accuracy, and effort is with | 228 | * risk of satisfactory quality, performance, accuracy, and effort is with |
229 | * the user. | 229 | * the user. |
230 | * | 230 | * |
231 | * libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are | 231 | * libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are |
232 | * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson, and are | 232 | * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson, and are |
233 | * distributed according to the same disclaimer and license as libpng-0.96, | 233 | * distributed according to the same disclaimer and license as libpng-0.96, |
234 | * with the following individuals added to the list of Contributing Authors: | 234 | * with the following individuals added to the list of Contributing Authors: |
235 | * | 235 | * |
236 | * Tom Lane | 236 | * Tom Lane |
237 | * Glenn Randers-Pehrson | 237 | * Glenn Randers-Pehrson |
238 | * Willem van Schaik | 238 | * Willem van Schaik |
239 | * | 239 | * |
240 | * libpng versions 0.89, June 1996, through 0.96, May 1997, are | 240 | * libpng versions 0.89, June 1996, through 0.96, May 1997, are |
241 | * Copyright (c) 1996, 1997 Andreas Dilger | 241 | * Copyright (c) 1996, 1997 Andreas Dilger |
242 | * Distributed according to the same disclaimer and license as libpng-0.88, | 242 | * Distributed according to the same disclaimer and license as libpng-0.88, |
243 | * with the following individuals added to the list of Contributing Authors: | 243 | * with the following individuals added to the list of Contributing Authors: |
244 | * | 244 | * |
245 | * John Bowler | 245 | * John Bowler |
246 | * Kevin Bracey | 246 | * Kevin Bracey |
247 | * Sam Bushell | 247 | * Sam Bushell |
248 | * Magnus Holmgren | 248 | * Magnus Holmgren |
249 | * Greg Roelofs | 249 | * Greg Roelofs |
250 | * Tom Tanner | 250 | * Tom Tanner |
251 | * | 251 | * |
252 | * libpng versions 0.5, May 1995, through 0.88, January 1996, are | 252 | * libpng versions 0.5, May 1995, through 0.88, January 1996, are |
253 | * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. | 253 | * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc. |
254 | * | 254 | * |
255 | * For the purposes of this copyright and license, "Contributing Authors" | 255 | * For the purposes of this copyright and license, "Contributing Authors" |
256 | * is defined as the following set of individuals: | 256 | * is defined as the following set of individuals: |
257 | * | 257 | * |
258 | * Andreas Dilger | 258 | * Andreas Dilger |
259 | * Dave Martindale | 259 | * Dave Martindale |
260 | * Guy Eric Schalnat | 260 | * Guy Eric Schalnat |
261 | * Paul Schmidt | 261 | * Paul Schmidt |
262 | * Tim Wegner | 262 | * Tim Wegner |
263 | * | 263 | * |
264 | * The PNG Reference Library is supplied "AS IS". The Contributing Authors | 264 | * The PNG Reference Library is supplied "AS IS". The Contributing Authors |
265 | * and Group 42, Inc. disclaim all warranties, expressed or implied, | 265 | * and Group 42, Inc. disclaim all warranties, expressed or implied, |
266 | * including, without limitation, the warranties of merchantability and of | 266 | * including, without limitation, the warranties of merchantability and of |
267 | * fitness for any purpose. The Contributing Authors and Group 42, Inc. | 267 | * fitness for any purpose. The Contributing Authors and Group 42, Inc. |
268 | * assume no liability for direct, indirect, incidental, special, exemplary, | 268 | * assume no liability for direct, indirect, incidental, special, exemplary, |
269 | * or consequential damages, which may result from the use of the PNG | 269 | * or consequential damages, which may result from the use of the PNG |
270 | * Reference Library, even if advised of the possibility of such damage. | 270 | * Reference Library, even if advised of the possibility of such damage. |
271 | * | 271 | * |
272 | * Permission is hereby granted to use, copy, modify, and distribute this | 272 | * Permission is hereby granted to use, copy, modify, and distribute this |
273 | * source code, or portions hereof, for any purpose, without fee, subject | 273 | * source code, or portions hereof, for any purpose, without fee, subject |
274 | * to the following restrictions: | 274 | * to the following restrictions: |
275 | * | 275 | * |
276 | * 1. The origin of this source code must not be misrepresented. | 276 | * 1. The origin of this source code must not be misrepresented. |
277 | * | 277 | * |
278 | * 2. Altered versions must be plainly marked as such and must not | 278 | * 2. Altered versions must be plainly marked as such and must not |
279 | * be misrepresented as being the original source. | 279 | * be misrepresented as being the original source. |
280 | * | 280 | * |
281 | * 3. This Copyright notice may not be removed or altered from | 281 | * 3. This Copyright notice may not be removed or altered from |
282 | * any source or altered source distribution. | 282 | * any source or altered source distribution. |
283 | * | 283 | * |
284 | * The Contributing Authors and Group 42, Inc. specifically permit, without | 284 | * The Contributing Authors and Group 42, Inc. specifically permit, without |
285 | * fee, and encourage the use of this source code as a component to | 285 | * fee, and encourage the use of this source code as a component to |
286 | * supporting the PNG file format in commercial products. If you use this | 286 | * supporting the PNG file format in commercial products. If you use this |
287 | * source code in a product, acknowledgment is not required but would be | 287 | * source code in a product, acknowledgment is not required but would be |
288 | * appreciated. | 288 | * appreciated. |
289 | */ | 289 | */ |
290 | 290 | ||
291 | /* | 291 | /* |
292 | * A "png_get_copyright" function is available, for convenient use in "about" | 292 | * A "png_get_copyright" function is available, for convenient use in "about" |
293 | * boxes and the like: | 293 | * boxes and the like: |
294 | * | 294 | * |
295 | * printf("%s", png_get_copyright(NULL)); | 295 | * printf("%s", png_get_copyright(NULL)); |
296 | * | 296 | * |
297 | * Also, the PNG logo (in PNG format, of course) is supplied in the | 297 | * Also, the PNG logo (in PNG format, of course) is supplied in the |
298 | * files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31). | 298 | * files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31). |
299 | */ | 299 | */ |
300 | 300 | ||
301 | /* | 301 | /* |
302 | * Libpng is OSI Certified Open Source Software. OSI Certified is a | 302 | * Libpng is OSI Certified Open Source Software. OSI Certified is a |
303 | * certification mark of the Open Source Initiative. | 303 | * certification mark of the Open Source Initiative. |
304 | */ | 304 | */ |
305 | 305 | ||
306 | /* | 306 | /* |
307 | * The contributing authors would like to thank all those who helped | 307 | * The contributing authors would like to thank all those who helped |
308 | * with testing, bug fixes, and patience. This wouldn't have been | 308 | * with testing, bug fixes, and patience. This wouldn't have been |
309 | * possible without all of you. | 309 | * possible without all of you. |
310 | * | 310 | * |
311 | * Thanks to Frank J. T. Wojcik for helping with the documentation. | 311 | * Thanks to Frank J. T. Wojcik for helping with the documentation. |
312 | */ | 312 | */ |
313 | 313 | ||
314 | /* | 314 | /* |
315 | * Y2K compliance in libpng: | 315 | * Y2K compliance in libpng: |
316 | * ========================= | 316 | * ========================= |
317 | * | 317 | * |
318 | * February 18, 2012 | 318 | * February 18, 2012 |
319 | * | 319 | * |
320 | * Since the PNG Development group is an ad-hoc body, we can't make | 320 | * Since the PNG Development group is an ad-hoc body, we can't make |
321 | * an official declaration. | 321 | * an official declaration. |
322 | * | 322 | * |
323 | * This is your unofficial assurance that libpng from version 0.71 and | 323 | * This is your unofficial assurance that libpng from version 0.71 and |
324 | * upward through 1.5.9 are Y2K compliant. It is my belief that | 324 | * upward through 1.5.9 are Y2K compliant. It is my belief that |
325 | * earlier versions were also Y2K compliant. | 325 | * earlier versions were also Y2K compliant. |
326 | * | 326 | * |
327 | * Libpng only has two year fields. One is a 2-byte unsigned integer | 327 | * Libpng only has two year fields. One is a 2-byte unsigned integer |
328 | * that will hold years up to 65535. The other holds the date in text | 328 | * that will hold years up to 65535. The other holds the date in text |
329 | * format, and will hold years up to 9999. | 329 | * format, and will hold years up to 9999. |
330 | * | 330 | * |
331 | * The integer is | 331 | * The integer is |
332 | * "png_uint_16 year" in png_time_struct. | 332 | * "png_uint_16 year" in png_time_struct. |
333 | * | 333 | * |
334 | * The string is | 334 | * The string is |
335 | * "png_char time_buffer" in png_struct | 335 | * "png_char time_buffer" in png_struct |
336 | * | 336 | * |
337 | * There are seven time-related functions: | 337 | * There are seven time-related functions: |
338 | * png.c: png_convert_to_rfc_1123() in png.c | 338 | * png.c: png_convert_to_rfc_1123() in png.c |
339 | * (formerly png_convert_to_rfc_1152() in error) | 339 | * (formerly png_convert_to_rfc_1152() in error) |
340 | * png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c | 340 | * png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c |
341 | * png_convert_from_time_t() in pngwrite.c | 341 | * png_convert_from_time_t() in pngwrite.c |
342 | * png_get_tIME() in pngget.c | 342 | * png_get_tIME() in pngget.c |
343 | * png_handle_tIME() in pngrutil.c, called in pngread.c | 343 | * png_handle_tIME() in pngrutil.c, called in pngread.c |
344 | * png_set_tIME() in pngset.c | 344 | * png_set_tIME() in pngset.c |
345 | * png_write_tIME() in pngwutil.c, called in pngwrite.c | 345 | * png_write_tIME() in pngwutil.c, called in pngwrite.c |
346 | * | 346 | * |
347 | * All handle dates properly in a Y2K environment. The | 347 | * All handle dates properly in a Y2K environment. The |
348 | * png_convert_from_time_t() function calls gmtime() to convert from system | 348 | * png_convert_from_time_t() function calls gmtime() to convert from system |
349 | * clock time, which returns (year - 1900), which we properly convert to | 349 | * clock time, which returns (year - 1900), which we properly convert to |
350 | * the full 4-digit year. There is a possibility that applications using | 350 | * the full 4-digit year. There is a possibility that applications using |
351 | * libpng are not passing 4-digit years into the png_convert_to_rfc_1123() | 351 | * libpng are not passing 4-digit years into the png_convert_to_rfc_1123() |
352 | * function, or that they are incorrectly passing only a 2-digit year | 352 | * function, or that they are incorrectly passing only a 2-digit year |
353 | * instead of "year - 1900" into the png_convert_from_struct_tm() function, | 353 | * instead of "year - 1900" into the png_convert_from_struct_tm() function, |
354 | * but this is not under our control. The libpng documentation has always | 354 | * but this is not under our control. The libpng documentation has always |
355 | * stated that it works with 4-digit years, and the APIs have been | 355 | * stated that it works with 4-digit years, and the APIs have been |
356 | * documented as such. | 356 | * documented as such. |
357 | * | 357 | * |
358 | * The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned | 358 | * The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned |
359 | * integer to hold the year, and can hold years as large as 65535. | 359 | * integer to hold the year, and can hold years as large as 65535. |
360 | * | 360 | * |
361 | * zlib, upon which libpng depends, is also Y2K compliant. It contains | 361 | * zlib, upon which libpng depends, is also Y2K compliant. It contains |
362 | * no date-related code. | 362 | * no date-related code. |
363 | * | 363 | * |
364 | * Glenn Randers-Pehrson | 364 | * Glenn Randers-Pehrson |
365 | * libpng maintainer | 365 | * libpng maintainer |
366 | * PNG Development Group | 366 | * PNG Development Group |
367 | */ | 367 | */ |
368 | 368 | ||
369 | #ifndef PNG_H | 369 | #ifndef PNG_H |
370 | #define PNG_H | 370 | #define PNG_H |
371 | 371 | ||
372 | /* This is not the place to learn how to use libpng. The file libpng-manual.txt | 372 | /* This is not the place to learn how to use libpng. The file libpng-manual.txt |
373 | * describes how to use libpng, and the file example.c summarizes it | 373 | * describes how to use libpng, and the file example.c summarizes it |
374 | * with some code on which to build. This file is useful for looking | 374 | * with some code on which to build. This file is useful for looking |
375 | * at the actual function definitions and structure components. | 375 | * at the actual function definitions and structure components. |
376 | * | 376 | * |
377 | * If you just need to read a PNG file and don't want to read the documentation | 377 | * If you just need to read a PNG file and don't want to read the documentation |
378 | * skip to the end of this file and read the section entitled 'simplified API'. | 378 | * skip to the end of this file and read the section entitled 'simplified API'. |
379 | */ | 379 | */ |
380 | 380 | ||
381 | /* Version information for png.h - this should match the version in png.c */ | 381 | /* Version information for png.h - this should match the version in png.c */ |
382 | #define PNG_LIBPNG_VER_STRING "1.5.9" | 382 | #define PNG_LIBPNG_VER_STRING "1.5.9" |
383 | #define PNG_HEADER_VERSION_STRING \ | 383 | #define PNG_HEADER_VERSION_STRING \ |
384 | " libpng version 1.5.9 - February 18, 2012\n" | 384 | " libpng version 1.5.9 - February 18, 2012\n" |
385 | 385 | ||
386 | #define PNG_LIBPNG_VER_SONUM 15 | 386 | #define PNG_LIBPNG_VER_SONUM 15 |
387 | #define PNG_LIBPNG_VER_DLLNUM 15 | 387 | #define PNG_LIBPNG_VER_DLLNUM 15 |
388 | 388 | ||
389 | /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */ | 389 | /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */ |
390 | #define PNG_LIBPNG_VER_MAJOR 1 | 390 | #define PNG_LIBPNG_VER_MAJOR 1 |
391 | #define PNG_LIBPNG_VER_MINOR 5 | 391 | #define PNG_LIBPNG_VER_MINOR 5 |
392 | #define PNG_LIBPNG_VER_RELEASE 9 | 392 | #define PNG_LIBPNG_VER_RELEASE 9 |
393 | 393 | ||
394 | /* This should match the numeric part of the final component of | 394 | /* This should match the numeric part of the final component of |
395 | * PNG_LIBPNG_VER_STRING, omitting any leading zero: | 395 | * PNG_LIBPNG_VER_STRING, omitting any leading zero: |
396 | */ | 396 | */ |
397 | 397 | ||
398 | #define PNG_LIBPNG_VER_BUILD 0 | 398 | #define PNG_LIBPNG_VER_BUILD 0 |
399 | 399 | ||
400 | /* Release Status */ | 400 | /* Release Status */ |
401 | #define PNG_LIBPNG_BUILD_ALPHA 1 | 401 | #define PNG_LIBPNG_BUILD_ALPHA 1 |
402 | #define PNG_LIBPNG_BUILD_BETA 2 | 402 | #define PNG_LIBPNG_BUILD_BETA 2 |
403 | #define PNG_LIBPNG_BUILD_RC 3 | 403 | #define PNG_LIBPNG_BUILD_RC 3 |
404 | #define PNG_LIBPNG_BUILD_STABLE 4 | 404 | #define PNG_LIBPNG_BUILD_STABLE 4 |
405 | #define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7 | 405 | #define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7 |
406 | 406 | ||
407 | /* Release-Specific Flags */ | 407 | /* Release-Specific Flags */ |
408 | #define PNG_LIBPNG_BUILD_PATCH 8 /* Can be OR'ed with | 408 | #define PNG_LIBPNG_BUILD_PATCH 8 /* Can be OR'ed with |
409 | PNG_LIBPNG_BUILD_STABLE only */ | 409 | PNG_LIBPNG_BUILD_STABLE only */ |
410 | #define PNG_LIBPNG_BUILD_PRIVATE 16 /* Cannot be OR'ed with | 410 | #define PNG_LIBPNG_BUILD_PRIVATE 16 /* Cannot be OR'ed with |
411 | PNG_LIBPNG_BUILD_SPECIAL */ | 411 | PNG_LIBPNG_BUILD_SPECIAL */ |
412 | #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with | 412 | #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with |
413 | PNG_LIBPNG_BUILD_PRIVATE */ | 413 | PNG_LIBPNG_BUILD_PRIVATE */ |
414 | 414 | ||
415 | #define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA | 415 | #define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA |
416 | 416 | ||
417 | /* Careful here. At one time, Guy wanted to use 082, but that would be octal. | 417 | /* Careful here. At one time, Guy wanted to use 082, but that would be octal. |
418 | * We must not include leading zeros. | 418 | * We must not include leading zeros. |
419 | * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only | 419 | * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only |
420 | * version 1.0.0 was mis-numbered 100 instead of 10000). From | 420 | * version 1.0.0 was mis-numbered 100 instead of 10000). From |
421 | * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release | 421 | * version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release |
422 | */ | 422 | */ |
423 | #define PNG_LIBPNG_VER 10509 /* 1.5.9 */ | 423 | #define PNG_LIBPNG_VER 10509 /* 1.5.9 */ |
424 | 424 | ||
425 | /* Library configuration: these options cannot be changed after | 425 | /* Library configuration: these options cannot be changed after |
426 | * the library has been built. | 426 | * the library has been built. |
427 | */ | 427 | */ |
428 | #ifndef PNGLCONF_H | 428 | #ifndef PNGLCONF_H |
429 | /* If pnglibconf.h is missing, you can | 429 | /* If pnglibconf.h is missing, you can |
430 | * copy scripts/pnglibconf.h.prebuilt to pnglibconf.h | 430 | * copy scripts/pnglibconf.h.prebuilt to pnglibconf.h |
431 | */ | 431 | */ |
432 | # include "pnglibconf.h" | 432 | # include "pnglibconf.h" |
433 | #endif | 433 | #endif |
434 | 434 | ||
435 | #ifndef PNG_VERSION_INFO_ONLY | 435 | #ifndef PNG_VERSION_INFO_ONLY |
436 | # ifndef PNG_BUILDING_SYMBOL_TABLE | 436 | # ifndef PNG_BUILDING_SYMBOL_TABLE |
437 | /* | 437 | /* |
438 | * Standard header files (not needed for the version info or while | 438 | * Standard header files (not needed for the version info or while |
439 | * building symbol table -- see scripts/pnglibconf.dfa) | 439 | * building symbol table -- see scripts/pnglibconf.dfa) |
440 | */ | 440 | */ |
441 | # ifdef PNG_SETJMP_SUPPORTED | 441 | # ifdef PNG_SETJMP_SUPPORTED |
442 | # include <setjmp.h> | 442 | # include <setjmp.h> |
443 | # endif | 443 | # endif |
444 | 444 | ||
445 | /* Need the time information for converting tIME chunks, it | 445 | /* Need the time information for converting tIME chunks, it |
446 | * defines struct tm: | 446 | * defines struct tm: |
447 | */ | 447 | */ |
448 | # ifdef PNG_CONVERT_tIME_SUPPORTED | 448 | # ifdef PNG_CONVERT_tIME_SUPPORTED |
449 | /* "time.h" functions are not supported on all operating systems */ | 449 | /* "time.h" functions are not supported on all operating systems */ |
450 | # include <time.h> | 450 | # include <time.h> |
451 | # endif | 451 | # endif |
452 | # endif | 452 | # endif |
453 | 453 | ||
454 | /* Machine specific configuration. */ | 454 | /* Machine specific configuration. */ |
455 | # include "pngconf.h" | 455 | # include "pngconf.h" |
456 | #endif | 456 | #endif |
457 | 457 | ||
458 | /* | 458 | /* |
459 | * Added at libpng-1.2.8 | 459 | * Added at libpng-1.2.8 |
460 | * | 460 | * |
461 | * Ref MSDN: Private as priority over Special | 461 | * Ref MSDN: Private as priority over Special |
462 | * VS_FF_PRIVATEBUILD File *was not* built using standard release | 462 | * VS_FF_PRIVATEBUILD File *was not* built using standard release |
463 | * procedures. If this value is given, the StringFileInfo block must | 463 | * procedures. If this value is given, the StringFileInfo block must |
464 | * contain a PrivateBuild string. | 464 | * contain a PrivateBuild string. |
465 | * | 465 | * |
466 | * VS_FF_SPECIALBUILD File *was* built by the original company using | 466 | * VS_FF_SPECIALBUILD File *was* built by the original company using |
467 | * standard release procedures but is a variation of the standard | 467 | * standard release procedures but is a variation of the standard |
468 | * file of the same version number. If this value is given, the | 468 | * file of the same version number. If this value is given, the |
469 | * StringFileInfo block must contain a SpecialBuild string. | 469 | * StringFileInfo block must contain a SpecialBuild string. |
470 | */ | 470 | */ |
471 | 471 | ||
472 | #ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */ | 472 | #ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */ |
473 | # define PNG_LIBPNG_BUILD_TYPE \ | 473 | # define PNG_LIBPNG_BUILD_TYPE \ |
474 | (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE) | 474 | (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE) |
475 | #else | 475 | #else |
476 | # ifdef PNG_LIBPNG_SPECIALBUILD | 476 | # ifdef PNG_LIBPNG_SPECIALBUILD |
477 | # define PNG_LIBPNG_BUILD_TYPE \ | 477 | # define PNG_LIBPNG_BUILD_TYPE \ |
478 | (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL) | 478 | (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL) |
479 | # else | 479 | # else |
480 | # define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE) | 480 | # define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE) |
481 | # endif | 481 | # endif |
482 | #endif | 482 | #endif |
483 | 483 | ||
484 | #ifndef PNG_VERSION_INFO_ONLY | 484 | #ifndef PNG_VERSION_INFO_ONLY |
485 | 485 | ||
486 | /* Inhibit C++ name-mangling for libpng functions but not for system calls. */ | 486 | /* Inhibit C++ name-mangling for libpng functions but not for system calls. */ |
487 | #ifdef __cplusplus | 487 | #ifdef __cplusplus |
488 | extern "C" { | 488 | extern "C" { |
489 | #endif /* __cplusplus */ | 489 | #endif /* __cplusplus */ |
490 | 490 | ||
491 | /* Version information for C files, stored in png.c. This had better match | 491 | /* Version information for C files, stored in png.c. This had better match |
492 | * the version above. | 492 | * the version above. |
493 | */ | 493 | */ |
494 | #define png_libpng_ver png_get_header_ver(NULL) | 494 | #define png_libpng_ver png_get_header_ver(NULL) |
495 | 495 | ||
496 | /* This file is arranged in several sections: | 496 | /* This file is arranged in several sections: |
497 | * | 497 | * |
498 | * 1. Any configuration options that can be specified by for the application | 498 | * 1. Any configuration options that can be specified by for the application |
499 | * code when it is built. (Build time configuration is in pnglibconf.h) | 499 | * code when it is built. (Build time configuration is in pnglibconf.h) |
500 | * 2. Type definitions (base types are defined in pngconf.h), structure | 500 | * 2. Type definitions (base types are defined in pngconf.h), structure |
501 | * definitions. | 501 | * definitions. |
502 | * 3. Exported library functions. | 502 | * 3. Exported library functions. |
503 | * | 503 | * |
504 | * The library source code has additional files (principally pngpriv.h) that | 504 | * The library source code has additional files (principally pngpriv.h) that |
505 | * allow configuration of the library. | 505 | * allow configuration of the library. |
506 | */ | 506 | */ |
507 | /* Section 1: run time configuration | 507 | /* Section 1: run time configuration |
508 | * See pnglibconf.h for build time configuration | 508 | * See pnglibconf.h for build time configuration |
509 | * | 509 | * |
510 | * Run time configuration allows the application to choose between | 510 | * Run time configuration allows the application to choose between |
511 | * implementations of certain arithmetic APIs. The default is set | 511 | * implementations of certain arithmetic APIs. The default is set |
512 | * at build time and recorded in pnglibconf.h, but it is safe to | 512 | * at build time and recorded in pnglibconf.h, but it is safe to |
513 | * override these (and only these) settings. Note that this won't | 513 | * override these (and only these) settings. Note that this won't |
514 | * change what the library does, only application code, and the | 514 | * change what the library does, only application code, and the |
515 | * settings can (and probably should) be made on a per-file basis | 515 | * settings can (and probably should) be made on a per-file basis |
516 | * by setting the #defines before including png.h | 516 | * by setting the #defines before including png.h |
517 | * | 517 | * |
518 | * Use macros to read integers from PNG data or use the exported | 518 | * Use macros to read integers from PNG data or use the exported |
519 | * functions? | 519 | * functions? |
520 | * PNG_USE_READ_MACROS: use the macros (see below) Note that | 520 | * PNG_USE_READ_MACROS: use the macros (see below) Note that |
521 | * the macros evaluate their argument multiple times. | 521 | * the macros evaluate their argument multiple times. |
522 | * PNG_NO_USE_READ_MACROS: call the relevant library function. | 522 | * PNG_NO_USE_READ_MACROS: call the relevant library function. |
523 | * | 523 | * |
524 | * Use the alternative algorithm for compositing alpha samples that | 524 | * Use the alternative algorithm for compositing alpha samples that |
525 | * does not use division? | 525 | * does not use division? |
526 | * PNG_READ_COMPOSITE_NODIV_SUPPORTED: use the 'no division' | 526 | * PNG_READ_COMPOSITE_NODIV_SUPPORTED: use the 'no division' |
527 | * algorithm. | 527 | * algorithm. |
528 | * PNG_NO_READ_COMPOSITE_NODIV: use the 'division' algorithm. | 528 | * PNG_NO_READ_COMPOSITE_NODIV: use the 'division' algorithm. |
529 | * | 529 | * |
530 | * How to handle benign errors if PNG_ALLOW_BENIGN_ERRORS is | 530 | * How to handle benign errors if PNG_ALLOW_BENIGN_ERRORS is |
531 | * false? | 531 | * false? |
532 | * PNG_ALLOW_BENIGN_ERRORS: map calls to the benign error | 532 | * PNG_ALLOW_BENIGN_ERRORS: map calls to the benign error |
533 | * APIs to png_warning. | 533 | * APIs to png_warning. |
534 | * Otherwise the calls are mapped to png_error. | 534 | * Otherwise the calls are mapped to png_error. |
535 | */ | 535 | */ |
536 | 536 | ||
537 | /* Section 2: type definitions, including structures and compile time | 537 | /* Section 2: type definitions, including structures and compile time |
538 | * constants. | 538 | * constants. |
539 | * See pngconf.h for base types that vary by machine/system | 539 | * See pngconf.h for base types that vary by machine/system |
540 | */ | 540 | */ |
541 | 541 | ||
542 | /* This triggers a compiler error in png.c, if png.c and png.h | 542 | /* This triggers a compiler error in png.c, if png.c and png.h |
543 | * do not agree upon the version number. | 543 | * do not agree upon the version number. |
544 | */ | 544 | */ |
545 | typedef char* png_libpng_version_1_5_9; | 545 | typedef char* png_libpng_version_1_5_9; |
546 | 546 | ||
547 | /* Three color definitions. The order of the red, green, and blue, (and the | 547 | /* Three color definitions. The order of the red, green, and blue, (and the |
548 | * exact size) is not important, although the size of the fields need to | 548 | * exact size) is not important, although the size of the fields need to |
549 | * be png_byte or png_uint_16 (as defined below). | 549 | * be png_byte or png_uint_16 (as defined below). |
550 | */ | 550 | */ |
551 | typedef struct png_color_struct | 551 | typedef struct png_color_struct |
552 | { | 552 | { |
553 | png_byte red; | 553 | png_byte red; |
554 | png_byte green; | 554 | png_byte green; |
555 | png_byte blue; | 555 | png_byte blue; |
556 | } png_color; | 556 | } png_color; |
557 | typedef png_color FAR * png_colorp; | 557 | typedef png_color FAR * png_colorp; |
558 | typedef PNG_CONST png_color FAR * png_const_colorp; | 558 | typedef PNG_CONST png_color FAR * png_const_colorp; |
559 | typedef png_color FAR * FAR * png_colorpp; | 559 | typedef png_color FAR * FAR * png_colorpp; |
560 | 560 | ||
561 | typedef struct png_color_16_struct | 561 | typedef struct png_color_16_struct |
562 | { | 562 | { |
563 | png_byte index; /* used for palette files */ | 563 | png_byte index; /* used for palette files */ |
564 | png_uint_16 red; /* for use in red green blue files */ | 564 | png_uint_16 red; /* for use in red green blue files */ |
565 | png_uint_16 green; | 565 | png_uint_16 green; |
566 | png_uint_16 blue; | 566 | png_uint_16 blue; |
567 | png_uint_16 gray; /* for use in grayscale files */ | 567 | png_uint_16 gray; /* for use in grayscale files */ |
568 | } png_color_16; | 568 | } png_color_16; |
569 | typedef png_color_16 FAR * png_color_16p; | 569 | typedef png_color_16 FAR * png_color_16p; |
570 | typedef PNG_CONST png_color_16 FAR * png_const_color_16p; | 570 | typedef PNG_CONST png_color_16 FAR * png_const_color_16p; |
571 | typedef png_color_16 FAR * FAR * png_color_16pp; | 571 | typedef png_color_16 FAR * FAR * png_color_16pp; |
572 | 572 | ||
573 | typedef struct png_color_8_struct | 573 | typedef struct png_color_8_struct |
574 | { | 574 | { |
575 | png_byte red; /* for use in red green blue files */ | 575 | png_byte red; /* for use in red green blue files */ |
576 | png_byte green; | 576 | png_byte green; |
577 | png_byte blue; | 577 | png_byte blue; |
578 | png_byte gray; /* for use in grayscale files */ | 578 | png_byte gray; /* for use in grayscale files */ |
579 | png_byte alpha; /* for alpha channel files */ | 579 | png_byte alpha; /* for alpha channel files */ |
580 | } png_color_8; | 580 | } png_color_8; |
581 | typedef png_color_8 FAR * png_color_8p; | 581 | typedef png_color_8 FAR * png_color_8p; |
582 | typedef PNG_CONST png_color_8 FAR * png_const_color_8p; | 582 | typedef PNG_CONST png_color_8 FAR * png_const_color_8p; |
583 | typedef png_color_8 FAR * FAR * png_color_8pp; | 583 | typedef png_color_8 FAR * FAR * png_color_8pp; |
584 | 584 | ||
585 | /* | 585 | /* |
586 | * The following two structures are used for the in-core representation | 586 | * The following two structures are used for the in-core representation |
587 | * of sPLT chunks. | 587 | * of sPLT chunks. |
588 | */ | 588 | */ |
589 | typedef struct png_sPLT_entry_struct | 589 | typedef struct png_sPLT_entry_struct |
590 | { | 590 | { |
591 | png_uint_16 red; | 591 | png_uint_16 red; |
592 | png_uint_16 green; | 592 | png_uint_16 green; |
593 | png_uint_16 blue; | 593 | png_uint_16 blue; |
594 | png_uint_16 alpha; | 594 | png_uint_16 alpha; |
595 | png_uint_16 frequency; | 595 | png_uint_16 frequency; |
596 | } png_sPLT_entry; | 596 | } png_sPLT_entry; |
597 | typedef png_sPLT_entry FAR * png_sPLT_entryp; | 597 | typedef png_sPLT_entry FAR * png_sPLT_entryp; |
598 | typedef PNG_CONST png_sPLT_entry FAR * png_const_sPLT_entryp; | 598 | typedef PNG_CONST png_sPLT_entry FAR * png_const_sPLT_entryp; |
599 | typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp; | 599 | typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp; |
600 | 600 | ||
601 | /* When the depth of the sPLT palette is 8 bits, the color and alpha samples | 601 | /* When the depth of the sPLT palette is 8 bits, the color and alpha samples |
602 | * occupy the LSB of their respective members, and the MSB of each member | 602 | * occupy the LSB of their respective members, and the MSB of each member |
603 | * is zero-filled. The frequency member always occupies the full 16 bits. | 603 | * is zero-filled. The frequency member always occupies the full 16 bits. |
604 | */ | 604 | */ |
605 | 605 | ||
606 | typedef struct png_sPLT_struct | 606 | typedef struct png_sPLT_struct |
607 | { | 607 | { |
608 | png_charp name; /* palette name */ | 608 | png_charp name; /* palette name */ |
609 | png_byte depth; /* depth of palette samples */ | 609 | png_byte depth; /* depth of palette samples */ |
610 | png_sPLT_entryp entries; /* palette entries */ | 610 | png_sPLT_entryp entries; /* palette entries */ |
611 | png_int_32 nentries; /* number of palette entries */ | 611 | png_int_32 nentries; /* number of palette entries */ |
612 | } png_sPLT_t; | 612 | } png_sPLT_t; |
613 | typedef png_sPLT_t FAR * png_sPLT_tp; | 613 | typedef png_sPLT_t FAR * png_sPLT_tp; |
614 | typedef PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp; | 614 | typedef PNG_CONST png_sPLT_t FAR * png_const_sPLT_tp; |
615 | typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; | 615 | typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; |
616 | 616 | ||
617 | #ifdef PNG_TEXT_SUPPORTED | 617 | #ifdef PNG_TEXT_SUPPORTED |
618 | /* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file, | 618 | /* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file, |
619 | * and whether that contents is compressed or not. The "key" field | 619 | * and whether that contents is compressed or not. The "key" field |
620 | * points to a regular zero-terminated C string. The "text" fields can be a | 620 | * points to a regular zero-terminated C string. The "text" fields can be a |
621 | * regular C string, an empty string, or a NULL pointer. | 621 | * regular C string, an empty string, or a NULL pointer. |
622 | * However, the structure returned by png_get_text() will always contain | 622 | * However, the structure returned by png_get_text() will always contain |
623 | * the "text" field as a regular zero-terminated C string (possibly | 623 | * the "text" field as a regular zero-terminated C string (possibly |
624 | * empty), never a NULL pointer, so it can be safely used in printf() and | 624 | * empty), never a NULL pointer, so it can be safely used in printf() and |
625 | * other string-handling functions. Note that the "itxt_length", "lang", and | 625 | * other string-handling functions. Note that the "itxt_length", "lang", and |
626 | * "lang_key" members of the structure only exist when the library is built | 626 | * "lang_key" members of the structure only exist when the library is built |
627 | * with iTXt chunk support. Prior to libpng-1.4.0 the library was built by | 627 | * with iTXt chunk support. Prior to libpng-1.4.0 the library was built by |
628 | * default without iTXt support. Also note that when iTXt *is* supported, | 628 | * default without iTXt support. Also note that when iTXt *is* supported, |
629 | * the "lang" and "lang_key" fields contain NULL pointers when the | 629 | * the "lang" and "lang_key" fields contain NULL pointers when the |
630 | * "compression" field contains * PNG_TEXT_COMPRESSION_NONE or | 630 | * "compression" field contains * PNG_TEXT_COMPRESSION_NONE or |
631 | * PNG_TEXT_COMPRESSION_zTXt. Note that the "compression value" is not the | 631 | * PNG_TEXT_COMPRESSION_zTXt. Note that the "compression value" is not the |
632 | * same as what appears in the PNG tEXt/zTXt/iTXt chunk's "compression flag" | 632 | * same as what appears in the PNG tEXt/zTXt/iTXt chunk's "compression flag" |
633 | * which is always 0 or 1, or its "compression method" which is always 0. | 633 | * which is always 0 or 1, or its "compression method" which is always 0. |
634 | */ | 634 | */ |
635 | typedef struct png_text_struct | 635 | typedef struct png_text_struct |
636 | { | 636 | { |
637 | int compression; /* compression value: | 637 | int compression; /* compression value: |
638 | -1: tEXt, none | 638 | -1: tEXt, none |
639 | 0: zTXt, deflate | 639 | 0: zTXt, deflate |
640 | 1: iTXt, none | 640 | 1: iTXt, none |
641 | 2: iTXt, deflate */ | 641 | 2: iTXt, deflate */ |
642 | png_charp key; /* keyword, 1-79 character description of "text" */ | 642 | png_charp key; /* keyword, 1-79 character description of "text" */ |
643 | png_charp text; /* comment, may be an empty string (ie "") | 643 | png_charp text; /* comment, may be an empty string (ie "") |
644 | or a NULL pointer */ | 644 | or a NULL pointer */ |
645 | png_size_t text_length; /* length of the text string */ | 645 | png_size_t text_length; /* length of the text string */ |
646 | png_size_t itxt_length; /* length of the itxt string */ | 646 | png_size_t itxt_length; /* length of the itxt string */ |
647 | png_charp lang; /* language code, 0-79 characters | 647 | png_charp lang; /* language code, 0-79 characters |
648 | or a NULL pointer */ | 648 | or a NULL pointer */ |
649 | png_charp lang_key; /* keyword translated UTF-8 string, 0 or more | 649 | png_charp lang_key; /* keyword translated UTF-8 string, 0 or more |
650 | chars or a NULL pointer */ | 650 | chars or a NULL pointer */ |
651 | } png_text; | 651 | } png_text; |
652 | typedef png_text FAR * png_textp; | 652 | typedef png_text FAR * png_textp; |
653 | typedef PNG_CONST png_text FAR * png_const_textp; | 653 | typedef PNG_CONST png_text FAR * png_const_textp; |
654 | typedef png_text FAR * FAR * png_textpp; | 654 | typedef png_text FAR * FAR * png_textpp; |
655 | #endif | 655 | #endif |
656 | 656 | ||
657 | /* Supported compression types for text in PNG files (tEXt, and zTXt). | 657 | /* Supported compression types for text in PNG files (tEXt, and zTXt). |
658 | * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */ | 658 | * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. */ |
659 | #define PNG_TEXT_COMPRESSION_NONE_WR -3 | 659 | #define PNG_TEXT_COMPRESSION_NONE_WR -3 |
660 | #define PNG_TEXT_COMPRESSION_zTXt_WR -2 | 660 | #define PNG_TEXT_COMPRESSION_zTXt_WR -2 |
661 | #define PNG_TEXT_COMPRESSION_NONE -1 | 661 | #define PNG_TEXT_COMPRESSION_NONE -1 |
662 | #define PNG_TEXT_COMPRESSION_zTXt 0 | 662 | #define PNG_TEXT_COMPRESSION_zTXt 0 |
663 | #define PNG_ITXT_COMPRESSION_NONE 1 | 663 | #define PNG_ITXT_COMPRESSION_NONE 1 |
664 | #define PNG_ITXT_COMPRESSION_zTXt 2 | 664 | #define PNG_ITXT_COMPRESSION_zTXt 2 |
665 | #define PNG_TEXT_COMPRESSION_LAST 3 /* Not a valid value */ | 665 | #define PNG_TEXT_COMPRESSION_LAST 3 /* Not a valid value */ |
666 | 666 | ||
667 | /* png_time is a way to hold the time in an machine independent way. | 667 | /* png_time is a way to hold the time in an machine independent way. |
668 | * Two conversions are provided, both from time_t and struct tm. There | 668 | * Two conversions are provided, both from time_t and struct tm. There |
669 | * is no portable way to convert to either of these structures, as far | 669 | * is no portable way to convert to either of these structures, as far |
670 | * as I know. If you know of a portable way, send it to me. As a side | 670 | * as I know. If you know of a portable way, send it to me. As a side |
671 | * note - PNG has always been Year 2000 compliant! | 671 | * note - PNG has always been Year 2000 compliant! |
672 | */ | 672 | */ |
673 | typedef struct png_time_struct | 673 | typedef struct png_time_struct |
674 | { | 674 | { |
675 | png_uint_16 year; /* full year, as in, 1995 */ | 675 | png_uint_16 year; /* full year, as in, 1995 */ |
676 | png_byte month; /* month of year, 1 - 12 */ | 676 | png_byte month; /* month of year, 1 - 12 */ |
677 | png_byte day; /* day of month, 1 - 31 */ | 677 | png_byte day; /* day of month, 1 - 31 */ |
678 | png_byte hour; /* hour of day, 0 - 23 */ | 678 | png_byte hour; /* hour of day, 0 - 23 */ |
679 | png_byte minute; /* minute of hour, 0 - 59 */ | 679 | png_byte minute; /* minute of hour, 0 - 59 */ |
680 | png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ | 680 | png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ |
681 | } png_time; | 681 | } png_time; |
682 | typedef png_time FAR * png_timep; | 682 | typedef png_time FAR * png_timep; |
683 | typedef PNG_CONST png_time FAR * png_const_timep; | 683 | typedef PNG_CONST png_time FAR * png_const_timep; |
684 | typedef png_time FAR * FAR * png_timepp; | 684 | typedef png_time FAR * FAR * png_timepp; |
685 | 685 | ||
686 | #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ | 686 | #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ |
687 | defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) | 687 | defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) |
688 | /* png_unknown_chunk is a structure to hold queued chunks for which there is | 688 | /* png_unknown_chunk is a structure to hold queued chunks for which there is |
689 | * no specific support. The idea is that we can use this to queue | 689 | * no specific support. The idea is that we can use this to queue |
690 | * up private chunks for output even though the library doesn't actually | 690 | * up private chunks for output even though the library doesn't actually |
691 | * know about their semantics. | 691 | * know about their semantics. |
692 | */ | 692 | */ |
693 | typedef struct png_unknown_chunk_t | 693 | typedef struct png_unknown_chunk_t |
694 | { | 694 | { |
695 | png_byte name[5]; | 695 | png_byte name[5]; |
696 | png_byte *data; | 696 | png_byte *data; |
697 | png_size_t size; | 697 | png_size_t size; |
698 | 698 | ||
699 | /* libpng-using applications should NOT directly modify this byte. */ | 699 | /* libpng-using applications should NOT directly modify this byte. */ |
700 | png_byte location; /* mode of operation at read time */ | 700 | png_byte location; /* mode of operation at read time */ |
701 | } | 701 | } |
702 | 702 | ||
703 | 703 | ||
704 | png_unknown_chunk; | 704 | png_unknown_chunk; |
705 | typedef png_unknown_chunk FAR * png_unknown_chunkp; | 705 | typedef png_unknown_chunk FAR * png_unknown_chunkp; |
706 | typedef PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp; | 706 | typedef PNG_CONST png_unknown_chunk FAR * png_const_unknown_chunkp; |
707 | typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp; | 707 | typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp; |
708 | #endif | 708 | #endif |
709 | 709 | ||
710 | /* Values for the unknown chunk location byte */ | 710 | /* Values for the unknown chunk location byte */ |
711 | 711 | ||
712 | #define PNG_HAVE_IHDR 0x01 | 712 | #define PNG_HAVE_IHDR 0x01 |
713 | #define PNG_HAVE_PLTE 0x02 | 713 | #define PNG_HAVE_PLTE 0x02 |
714 | #define PNG_AFTER_IDAT 0x08 | 714 | #define PNG_AFTER_IDAT 0x08 |
715 | 715 | ||
716 | /* The complete definition of png_info has, as of libpng-1.5.0, | 716 | /* The complete definition of png_info has, as of libpng-1.5.0, |
717 | * been moved into a separate header file that is not accessible to | 717 | * been moved into a separate header file that is not accessible to |
718 | * applications. Read libpng-manual.txt or libpng.3 for more info. | 718 | * applications. Read libpng-manual.txt or libpng.3 for more info. |
719 | */ | 719 | */ |
720 | typedef struct png_info_def png_info; | 720 | typedef struct png_info_def png_info; |
721 | typedef png_info FAR * png_infop; | 721 | typedef png_info FAR * png_infop; |
722 | typedef PNG_CONST png_info FAR * png_const_infop; | 722 | typedef PNG_CONST png_info FAR * png_const_infop; |
723 | typedef png_info FAR * FAR * png_infopp; | 723 | typedef png_info FAR * FAR * png_infopp; |
724 | 724 | ||
725 | /* Maximum positive integer used in PNG is (2^31)-1 */ | 725 | /* Maximum positive integer used in PNG is (2^31)-1 */ |
726 | #define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL) | 726 | #define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL) |
727 | #define PNG_UINT_32_MAX ((png_uint_32)(-1)) | 727 | #define PNG_UINT_32_MAX ((png_uint_32)(-1)) |
728 | #define PNG_SIZE_MAX ((png_size_t)(-1)) | 728 | #define PNG_SIZE_MAX ((png_size_t)(-1)) |
729 | 729 | ||
730 | /* These are constants for fixed point values encoded in the | 730 | /* These are constants for fixed point values encoded in the |
731 | * PNG specification manner (x100000) | 731 | * PNG specification manner (x100000) |
732 | */ | 732 | */ |
733 | #define PNG_FP_1 100000 | 733 | #define PNG_FP_1 100000 |
734 | #define PNG_FP_HALF 50000 | 734 | #define PNG_FP_HALF 50000 |
735 | #define PNG_FP_MAX ((png_fixed_point)0x7fffffffL) | 735 | #define PNG_FP_MAX ((png_fixed_point)0x7fffffffL) |
736 | #define PNG_FP_MIN (-PNG_FP_MAX) | 736 | #define PNG_FP_MIN (-PNG_FP_MAX) |
737 | 737 | ||
738 | /* These describe the color_type field in png_info. */ | 738 | /* These describe the color_type field in png_info. */ |
739 | /* color type masks */ | 739 | /* color type masks */ |
740 | #define PNG_COLOR_MASK_PALETTE 1 | 740 | #define PNG_COLOR_MASK_PALETTE 1 |
741 | #define PNG_COLOR_MASK_COLOR 2 | 741 | #define PNG_COLOR_MASK_COLOR 2 |
742 | #define PNG_COLOR_MASK_ALPHA 4 | 742 | #define PNG_COLOR_MASK_ALPHA 4 |
743 | 743 | ||
744 | /* color types. Note that not all combinations are legal */ | 744 | /* color types. Note that not all combinations are legal */ |
745 | #define PNG_COLOR_TYPE_GRAY 0 | 745 | #define PNG_COLOR_TYPE_GRAY 0 |
746 | #define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE) | 746 | #define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE) |
747 | #define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR) | 747 | #define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR) |
748 | #define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA) | 748 | #define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA) |
749 | #define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA) | 749 | #define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA) |
750 | /* aliases */ | 750 | /* aliases */ |
751 | #define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA | 751 | #define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA |
752 | #define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA | 752 | #define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA |
753 | 753 | ||
754 | /* This is for compression type. PNG 1.0-1.2 only define the single type. */ | 754 | /* This is for compression type. PNG 1.0-1.2 only define the single type. */ |
755 | #define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */ | 755 | #define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */ |
756 | #define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE | 756 | #define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE |
757 | 757 | ||
758 | /* This is for filter type. PNG 1.0-1.2 only define the single type. */ | 758 | /* This is for filter type. PNG 1.0-1.2 only define the single type. */ |
759 | #define PNG_FILTER_TYPE_BASE 0 /* Single row per-byte filtering */ | 759 | #define PNG_FILTER_TYPE_BASE 0 /* Single row per-byte filtering */ |
760 | #define PNG_INTRAPIXEL_DIFFERENCING 64 /* Used only in MNG datastreams */ | 760 | #define PNG_INTRAPIXEL_DIFFERENCING 64 /* Used only in MNG datastreams */ |
761 | #define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE | 761 | #define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE |
762 | 762 | ||
763 | /* These are for the interlacing type. These values should NOT be changed. */ | 763 | /* These are for the interlacing type. These values should NOT be changed. */ |
764 | #define PNG_INTERLACE_NONE 0 /* Non-interlaced image */ | 764 | #define PNG_INTERLACE_NONE 0 /* Non-interlaced image */ |
765 | #define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */ | 765 | #define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */ |
766 | #define PNG_INTERLACE_LAST 2 /* Not a valid value */ | 766 | #define PNG_INTERLACE_LAST 2 /* Not a valid value */ |
767 | 767 | ||
768 | /* These are for the oFFs chunk. These values should NOT be changed. */ | 768 | /* These are for the oFFs chunk. These values should NOT be changed. */ |
769 | #define PNG_OFFSET_PIXEL 0 /* Offset in pixels */ | 769 | #define PNG_OFFSET_PIXEL 0 /* Offset in pixels */ |
770 | #define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */ | 770 | #define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */ |
771 | #define PNG_OFFSET_LAST 2 /* Not a valid value */ | 771 | #define PNG_OFFSET_LAST 2 /* Not a valid value */ |
772 | 772 | ||
773 | /* These are for the pCAL chunk. These values should NOT be changed. */ | 773 | /* These are for the pCAL chunk. These values should NOT be changed. */ |
774 | #define PNG_EQUATION_LINEAR 0 /* Linear transformation */ | 774 | #define PNG_EQUATION_LINEAR 0 /* Linear transformation */ |
775 | #define PNG_EQUATION_BASE_E 1 /* Exponential base e transform */ | 775 | #define PNG_EQUATION_BASE_E 1 /* Exponential base e transform */ |
776 | #define PNG_EQUATION_ARBITRARY 2 /* Arbitrary base exponential transform */ | 776 | #define PNG_EQUATION_ARBITRARY 2 /* Arbitrary base exponential transform */ |
777 | #define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */ | 777 | #define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */ |
778 | #define PNG_EQUATION_LAST 4 /* Not a valid value */ | 778 | #define PNG_EQUATION_LAST 4 /* Not a valid value */ |
779 | 779 | ||
780 | /* These are for the sCAL chunk. These values should NOT be changed. */ | 780 | /* These are for the sCAL chunk. These values should NOT be changed. */ |
781 | #define PNG_SCALE_UNKNOWN 0 /* unknown unit (image scale) */ | 781 | #define PNG_SCALE_UNKNOWN 0 /* unknown unit (image scale) */ |
782 | #define PNG_SCALE_METER 1 /* meters per pixel */ | 782 | #define PNG_SCALE_METER 1 /* meters per pixel */ |
783 | #define PNG_SCALE_RADIAN 2 /* radians per pixel */ | 783 | #define PNG_SCALE_RADIAN 2 /* radians per pixel */ |
784 | #define PNG_SCALE_LAST 3 /* Not a valid value */ | 784 | #define PNG_SCALE_LAST 3 /* Not a valid value */ |
785 | 785 | ||
786 | /* These are for the pHYs chunk. These values should NOT be changed. */ | 786 | /* These are for the pHYs chunk. These values should NOT be changed. */ |
787 | #define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */ | 787 | #define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */ |
788 | #define PNG_RESOLUTION_METER 1 /* pixels/meter */ | 788 | #define PNG_RESOLUTION_METER 1 /* pixels/meter */ |
789 | #define PNG_RESOLUTION_LAST 2 /* Not a valid value */ | 789 | #define PNG_RESOLUTION_LAST 2 /* Not a valid value */ |
790 | 790 | ||
791 | /* These are for the sRGB chunk. These values should NOT be changed. */ | 791 | /* These are for the sRGB chunk. These values should NOT be changed. */ |
792 | #define PNG_sRGB_INTENT_PERCEPTUAL 0 | 792 | #define PNG_sRGB_INTENT_PERCEPTUAL 0 |
793 | #define PNG_sRGB_INTENT_RELATIVE 1 | 793 | #define PNG_sRGB_INTENT_RELATIVE 1 |
794 | #define PNG_sRGB_INTENT_SATURATION 2 | 794 | #define PNG_sRGB_INTENT_SATURATION 2 |
795 | #define PNG_sRGB_INTENT_ABSOLUTE 3 | 795 | #define PNG_sRGB_INTENT_ABSOLUTE 3 |
796 | #define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */ | 796 | #define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */ |
797 | 797 | ||
798 | /* This is for text chunks */ | 798 | /* This is for text chunks */ |
799 | #define PNG_KEYWORD_MAX_LENGTH 79 | 799 | #define PNG_KEYWORD_MAX_LENGTH 79 |
800 | 800 | ||
801 | /* Maximum number of entries in PLTE/sPLT/tRNS arrays */ | 801 | /* Maximum number of entries in PLTE/sPLT/tRNS arrays */ |
802 | #define PNG_MAX_PALETTE_LENGTH 256 | 802 | #define PNG_MAX_PALETTE_LENGTH 256 |
803 | 803 | ||
804 | /* These determine if an ancillary chunk's data has been successfully read | 804 | /* These determine if an ancillary chunk's data has been successfully read |
805 | * from the PNG header, or if the application has filled in the corresponding | 805 | * from the PNG header, or if the application has filled in the corresponding |
806 | * data in the info_struct to be written into the output file. The values | 806 | * data in the info_struct to be written into the output file. The values |
807 | * of the PNG_INFO_<chunk> defines should NOT be changed. | 807 | * of the PNG_INFO_<chunk> defines should NOT be changed. |
808 | */ | 808 | */ |
809 | #define PNG_INFO_gAMA 0x0001 | 809 | #define PNG_INFO_gAMA 0x0001 |
810 | #define PNG_INFO_sBIT 0x0002 | 810 | #define PNG_INFO_sBIT 0x0002 |
811 | #define PNG_INFO_cHRM 0x0004 | 811 | #define PNG_INFO_cHRM 0x0004 |
812 | #define PNG_INFO_PLTE 0x0008 | 812 | #define PNG_INFO_PLTE 0x0008 |
813 | #define PNG_INFO_tRNS 0x0010 | 813 | #define PNG_INFO_tRNS 0x0010 |
814 | #define PNG_INFO_bKGD 0x0020 | 814 | #define PNG_INFO_bKGD 0x0020 |
815 | #define PNG_INFO_hIST 0x0040 | 815 | #define PNG_INFO_hIST 0x0040 |
816 | #define PNG_INFO_pHYs 0x0080 | 816 | #define PNG_INFO_pHYs 0x0080 |
817 | #define PNG_INFO_oFFs 0x0100 | 817 | #define PNG_INFO_oFFs 0x0100 |
818 | #define PNG_INFO_tIME 0x0200 | 818 | #define PNG_INFO_tIME 0x0200 |
819 | #define PNG_INFO_pCAL 0x0400 | 819 | #define PNG_INFO_pCAL 0x0400 |
820 | #define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */ | 820 | #define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */ |
821 | #define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ | 821 | #define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ |
822 | #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ | 822 | #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ |
823 | #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ | 823 | #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ |
824 | #define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */ | 824 | #define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */ |
825 | 825 | ||
826 | /* This is used for the transformation routines, as some of them | 826 | /* This is used for the transformation routines, as some of them |
827 | * change these values for the row. It also should enable using | 827 | * change these values for the row. It also should enable using |
828 | * the routines for other purposes. | 828 | * the routines for other purposes. |
829 | */ | 829 | */ |
830 | typedef struct png_row_info_struct | 830 | typedef struct png_row_info_struct |
831 | { | 831 | { |
832 | png_uint_32 width; /* width of row */ | 832 | png_uint_32 width; /* width of row */ |
833 | png_size_t rowbytes; /* number of bytes in row */ | 833 | png_size_t rowbytes; /* number of bytes in row */ |
834 | png_byte color_type; /* color type of row */ | 834 | png_byte color_type; /* color type of row */ |
835 | png_byte bit_depth; /* bit depth of row */ | 835 | png_byte bit_depth; /* bit depth of row */ |
836 | png_byte channels; /* number of channels (1, 2, 3, or 4) */ | 836 | png_byte channels; /* number of channels (1, 2, 3, or 4) */ |
837 | png_byte pixel_depth; /* bits per pixel (depth * channels) */ | 837 | png_byte pixel_depth; /* bits per pixel (depth * channels) */ |
838 | } png_row_info; | 838 | } png_row_info; |
839 | 839 | ||
840 | typedef png_row_info FAR * png_row_infop; | 840 | typedef png_row_info FAR * png_row_infop; |
841 | typedef png_row_info FAR * FAR * png_row_infopp; | 841 | typedef png_row_info FAR * FAR * png_row_infopp; |
842 | 842 | ||
843 | /* The complete definition of png_struct has, as of libpng-1.5.0, | 843 | /* The complete definition of png_struct has, as of libpng-1.5.0, |
844 | * been moved into a separate header file that is not accessible to | 844 | * been moved into a separate header file that is not accessible to |
845 | * applications. Read libpng-manual.txt or libpng.3 for more info. | 845 | * applications. Read libpng-manual.txt or libpng.3 for more info. |
846 | */ | 846 | */ |
847 | typedef struct png_struct_def png_struct; | 847 | typedef struct png_struct_def png_struct; |
848 | typedef PNG_CONST png_struct FAR * png_const_structp; | 848 | typedef PNG_CONST png_struct FAR * png_const_structp; |
849 | typedef png_struct FAR * png_structp; | 849 | typedef png_struct FAR * png_structp; |
850 | 850 | ||
851 | /* These are the function types for the I/O functions and for the functions | 851 | /* These are the function types for the I/O functions and for the functions |
852 | * that allow the user to override the default I/O functions with his or her | 852 | * that allow the user to override the default I/O functions with his or her |
853 | * own. The png_error_ptr type should match that of user-supplied warning | 853 | * own. The png_error_ptr type should match that of user-supplied warning |
854 | * and error functions, while the png_rw_ptr type should match that of the | 854 | * and error functions, while the png_rw_ptr type should match that of the |
855 | * user read/write data functions. Note that the 'write' function must not | 855 | * user read/write data functions. Note that the 'write' function must not |
856 | * modify the buffer it is passed. The 'read' function, on the other hand, is | 856 | * modify the buffer it is passed. The 'read' function, on the other hand, is |
857 | * expected to return the read data in the buffer. | 857 | * expected to return the read data in the buffer. |
858 | */ | 858 | */ |
859 | typedef PNG_CALLBACK(void, *png_error_ptr, (png_structp, png_const_charp)); | 859 | typedef PNG_CALLBACK(void, *png_error_ptr, (png_structp, png_const_charp)); |
860 | typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t)); | 860 | typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t)); |
861 | typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp)); | 861 | typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp)); |
862 | typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32, | 862 | typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32, |
863 | int)); | 863 | int)); |
864 | typedef PNG_CALLBACK(void, *png_write_status_ptr, (png_structp, png_uint_32, | 864 | typedef PNG_CALLBACK(void, *png_write_status_ptr, (png_structp, png_uint_32, |
865 | int)); | 865 | int)); |
866 | 866 | ||
867 | #ifdef PNG_PROGRESSIVE_READ_SUPPORTED | 867 | #ifdef PNG_PROGRESSIVE_READ_SUPPORTED |
868 | typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop)); | 868 | typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop)); |
869 | typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop)); | 869 | typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop)); |
870 | 870 | ||
871 | /* The following callback receives png_uint_32 row_number, int pass for the | 871 | /* The following callback receives png_uint_32 row_number, int pass for the |
872 | * png_bytep data of the row. When transforming an interlaced image the | 872 | * png_bytep data of the row. When transforming an interlaced image the |
873 | * row number is the row number within the sub-image of the interlace pass, so | 873 | * row number is the row number within the sub-image of the interlace pass, so |
874 | * the value will increase to the height of the sub-image (not the full image) | 874 | * the value will increase to the height of the sub-image (not the full image) |
875 | * then reset to 0 for the next pass. | 875 | * then reset to 0 for the next pass. |
876 | * | 876 | * |
877 | * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to | 877 | * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to |
878 | * find the output pixel (x,y) given an interlaced sub-image pixel | 878 | * find the output pixel (x,y) given an interlaced sub-image pixel |
879 | * (row,col,pass). (See below for these macros.) | 879 | * (row,col,pass). (See below for these macros.) |
880 | */ | 880 | */ |
881 | typedef PNG_CALLBACK(void, *png_progressive_row_ptr, (png_structp, png_bytep, | 881 | typedef PNG_CALLBACK(void, *png_progressive_row_ptr, (png_structp, png_bytep, |
882 | png_uint_32, int)); | 882 | png_uint_32, int)); |
883 | #endif | 883 | #endif |
884 | 884 | ||
885 | #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ | 885 | #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ |
886 | defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) | 886 | defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) |
887 | typedef PNG_CALLBACK(void, *png_user_transform_ptr, (png_structp, png_row_infop, | 887 | typedef PNG_CALLBACK(void, *png_user_transform_ptr, (png_structp, png_row_infop, |
888 | png_bytep)); | 888 | png_bytep)); |
889 | #endif | 889 | #endif |
890 | 890 | ||
891 | #ifdef PNG_USER_CHUNKS_SUPPORTED | 891 | #ifdef PNG_USER_CHUNKS_SUPPORTED |
892 | typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp, | 892 | typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp, |
893 | png_unknown_chunkp)); | 893 | png_unknown_chunkp)); |
894 | #endif | 894 | #endif |
895 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED | 895 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED |
896 | typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp)); | 896 | typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp)); |
897 | #endif | 897 | #endif |
898 | 898 | ||
899 | #ifdef PNG_SETJMP_SUPPORTED | 899 | #ifdef PNG_SETJMP_SUPPORTED |
900 | /* This must match the function definition in <setjmp.h>, and the application | 900 | /* This must match the function definition in <setjmp.h>, and the application |
901 | * must include this before png.h to obtain the definition of jmp_buf. The | 901 | * must include this before png.h to obtain the definition of jmp_buf. The |
902 | * function is required to be PNG_NORETURN, but this is not checked. If the | 902 | * function is required to be PNG_NORETURN, but this is not checked. If the |
903 | * function does return the application will crash via an abort() or similar | 903 | * function does return the application will crash via an abort() or similar |
904 | * system level call. | 904 | * system level call. |
905 | * | 905 | * |
906 | * If you get a warning here while building the library you may need to make | 906 | * If you get a warning here while building the library you may need to make |
907 | * changes to ensure that pnglibconf.h records the calling convention used by | 907 | * changes to ensure that pnglibconf.h records the calling convention used by |
908 | * your compiler. This may be very difficult - try using a different compiler | 908 | * your compiler. This may be very difficult - try using a different compiler |
909 | * to build the library! | 909 | * to build the library! |
910 | */ | 910 | */ |
911 | PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)), typedef); | 911 | PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)), typedef); |
912 | #endif | 912 | #endif |
913 | 913 | ||
914 | /* Transform masks for the high-level interface */ | 914 | /* Transform masks for the high-level interface */ |
915 | #define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */ | 915 | #define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */ |
916 | #define PNG_TRANSFORM_STRIP_16 0x0001 /* read only */ | 916 | #define PNG_TRANSFORM_STRIP_16 0x0001 /* read only */ |
917 | #define PNG_TRANSFORM_STRIP_ALPHA 0x0002 /* read only */ | 917 | #define PNG_TRANSFORM_STRIP_ALPHA 0x0002 /* read only */ |
918 | #define PNG_TRANSFORM_PACKING 0x0004 /* read and write */ | 918 | #define PNG_TRANSFORM_PACKING 0x0004 /* read and write */ |
919 | #define PNG_TRANSFORM_PACKSWAP 0x0008 /* read and write */ | 919 | #define PNG_TRANSFORM_PACKSWAP 0x0008 /* read and write */ |
920 | #define PNG_TRANSFORM_EXPAND 0x0010 /* read only */ | 920 | #define PNG_TRANSFORM_EXPAND 0x0010 /* read only */ |
921 | #define PNG_TRANSFORM_INVERT_MONO 0x0020 /* read and write */ | 921 | #define PNG_TRANSFORM_INVERT_MONO 0x0020 /* read and write */ |
922 | #define PNG_TRANSFORM_SHIFT 0x0040 /* read and write */ | 922 | #define PNG_TRANSFORM_SHIFT 0x0040 /* read and write */ |
923 | #define PNG_TRANSFORM_BGR 0x0080 /* read and write */ | 923 | #define PNG_TRANSFORM_BGR 0x0080 /* read and write */ |
924 | #define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */ | 924 | #define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */ |
925 | #define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */ | 925 | #define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */ |
926 | #define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */ | 926 | #define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */ |
927 | #define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only */ | 927 | #define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only */ |
928 | /* Added to libpng-1.2.34 */ | 928 | /* Added to libpng-1.2.34 */ |
929 | #define PNG_TRANSFORM_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER | 929 | #define PNG_TRANSFORM_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER |
930 | #define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */ | 930 | #define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */ |
931 | /* Added to libpng-1.4.0 */ | 931 | /* Added to libpng-1.4.0 */ |
932 | #define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */ | 932 | #define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */ |
933 | /* Added to libpng-1.5.4 */ | 933 | /* Added to libpng-1.5.4 */ |
934 | #define PNG_TRANSFORM_EXPAND_16 0x4000 /* read only */ | 934 | #define PNG_TRANSFORM_EXPAND_16 0x4000 /* read only */ |
935 | #define PNG_TRANSFORM_SCALE_16 0x8000 /* read only */ | 935 | #define PNG_TRANSFORM_SCALE_16 0x8000 /* read only */ |
936 | 936 | ||
937 | /* Flags for MNG supported features */ | 937 | /* Flags for MNG supported features */ |
938 | #define PNG_FLAG_MNG_EMPTY_PLTE 0x01 | 938 | #define PNG_FLAG_MNG_EMPTY_PLTE 0x01 |
939 | #define PNG_FLAG_MNG_FILTER_64 0x04 | 939 | #define PNG_FLAG_MNG_FILTER_64 0x04 |
940 | #define PNG_ALL_MNG_FEATURES 0x05 | 940 | #define PNG_ALL_MNG_FEATURES 0x05 |
941 | 941 | ||
942 | /* NOTE: prior to 1.5 these functions had no 'API' style declaration, | 942 | /* NOTE: prior to 1.5 these functions had no 'API' style declaration, |
943 | * this allowed the zlib default functions to be used on Windows | 943 | * this allowed the zlib default functions to be used on Windows |
944 | * platforms. In 1.5 the zlib default malloc (which just calls malloc and | 944 | * platforms. In 1.5 the zlib default malloc (which just calls malloc and |
945 | * ignores the first argument) should be completely compatible with the | 945 | * ignores the first argument) should be completely compatible with the |
946 | * following. | 946 | * following. |
947 | */ | 947 | */ |
948 | typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp, | 948 | typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp, |
949 | png_alloc_size_t)); | 949 | png_alloc_size_t)); |
950 | typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp)); | 950 | typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp)); |
951 | 951 | ||
952 | typedef png_struct FAR * FAR * png_structpp; | 952 | typedef png_struct FAR * FAR * png_structpp; |
953 | 953 | ||
954 | /* Section 3: exported functions | 954 | /* Section 3: exported functions |
955 | * Here are the function definitions most commonly used. This is not | 955 | * Here are the function definitions most commonly used. This is not |
956 | * the place to find out how to use libpng. See libpng-manual.txt for the | 956 | * the place to find out how to use libpng. See libpng-manual.txt for the |
957 | * full explanation, see example.c for the summary. This just provides | 957 | * full explanation, see example.c for the summary. This just provides |
958 | * a simple one line description of the use of each function. | 958 | * a simple one line description of the use of each function. |
959 | * | 959 | * |
960 | * The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in | 960 | * The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in |
961 | * pngconf.h and in the *.dfn files in the scripts directory. | 961 | * pngconf.h and in the *.dfn files in the scripts directory. |
962 | * | 962 | * |
963 | * PNG_EXPORT(ordinal, type, name, (args)); | 963 | * PNG_EXPORT(ordinal, type, name, (args)); |
964 | * | 964 | * |
965 | * ordinal: ordinal that is used while building | 965 | * ordinal: ordinal that is used while building |
966 | * *.def files. The ordinal value is only | 966 | * *.def files. The ordinal value is only |
967 | * relevant when preprocessing png.h with | 967 | * relevant when preprocessing png.h with |
968 | * the *.dfn files for building symbol table | 968 | * the *.dfn files for building symbol table |
969 | * entries, and are removed by pngconf.h. | 969 | * entries, and are removed by pngconf.h. |
970 | * type: return type of the function | 970 | * type: return type of the function |
971 | * name: function name | 971 | * name: function name |
972 | * args: function arguments, with types | 972 | * args: function arguments, with types |
973 | * | 973 | * |
974 | * When we wish to append attributes to a function prototype we use | 974 | * When we wish to append attributes to a function prototype we use |
975 | * the PNG_EXPORTA() macro instead. | 975 | * the PNG_EXPORTA() macro instead. |
976 | * | 976 | * |
977 | * PNG_EXPORTA(ordinal, type, name, (args), attributes); | 977 | * PNG_EXPORTA(ordinal, type, name, (args), attributes); |
978 | * | 978 | * |
979 | * ordinal, type, name, and args: same as in PNG_EXPORT(). | 979 | * ordinal, type, name, and args: same as in PNG_EXPORT(). |
980 | * attributes: function attributes | 980 | * attributes: function attributes |
981 | */ | 981 | */ |
982 | 982 | ||
983 | /* Returns the version number of the library */ | 983 | /* Returns the version number of the library */ |
984 | PNG_EXPORT(1, png_uint_32, png_access_version_number, (void)); | 984 | PNG_EXPORT(1, png_uint_32, png_access_version_number, (void)); |
985 | 985 | ||
986 | /* Tell lib we have already handled the first <num_bytes> magic bytes. | 986 | /* Tell lib we have already handled the first <num_bytes> magic bytes. |
987 | * Handling more than 8 bytes from the beginning of the file is an error. | 987 | * Handling more than 8 bytes from the beginning of the file is an error. |
988 | */ | 988 | */ |
989 | PNG_EXPORT(2, void, png_set_sig_bytes, (png_structp png_ptr, int num_bytes)); | 989 | PNG_EXPORT(2, void, png_set_sig_bytes, (png_structp png_ptr, int num_bytes)); |
990 | 990 | ||
991 | /* Check sig[start] through sig[start + num_to_check - 1] to see if it's a | 991 | /* Check sig[start] through sig[start + num_to_check - 1] to see if it's a |
992 | * PNG file. Returns zero if the supplied bytes match the 8-byte PNG | 992 | * PNG file. Returns zero if the supplied bytes match the 8-byte PNG |
993 | * signature, and non-zero otherwise. Having num_to_check == 0 or | 993 | * signature, and non-zero otherwise. Having num_to_check == 0 or |
994 | * start > 7 will always fail (ie return non-zero). | 994 | * start > 7 will always fail (ie return non-zero). |
995 | */ | 995 | */ |
996 | PNG_EXPORT(3, int, png_sig_cmp, (png_const_bytep sig, png_size_t start, | 996 | PNG_EXPORT(3, int, png_sig_cmp, (png_const_bytep sig, png_size_t start, |
997 | png_size_t num_to_check)); | 997 | png_size_t num_to_check)); |
998 | 998 | ||
999 | /* Simple signature checking function. This is the same as calling | 999 | /* Simple signature checking function. This is the same as calling |
1000 | * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). | 1000 | * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). |
1001 | */ | 1001 | */ |
1002 | #define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n)) | 1002 | #define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n)) |
1003 | 1003 | ||
1004 | /* Allocate and initialize png_ptr struct for reading, and any other memory. */ | 1004 | /* Allocate and initialize png_ptr struct for reading, and any other memory. */ |
1005 | PNG_EXPORTA(4, png_structp, png_create_read_struct, | 1005 | PNG_EXPORTA(4, png_structp, png_create_read_struct, |
1006 | (png_const_charp user_png_ver, png_voidp error_ptr, | 1006 | (png_const_charp user_png_ver, png_voidp error_ptr, |
1007 | png_error_ptr error_fn, png_error_ptr warn_fn), | 1007 | png_error_ptr error_fn, png_error_ptr warn_fn), |
1008 | PNG_ALLOCATED); | 1008 | PNG_ALLOCATED); |
1009 | 1009 | ||
1010 | /* Allocate and initialize png_ptr struct for writing, and any other memory */ | 1010 | /* Allocate and initialize png_ptr struct for writing, and any other memory */ |
1011 | PNG_EXPORTA(5, png_structp, png_create_write_struct, | 1011 | PNG_EXPORTA(5, png_structp, png_create_write_struct, |
1012 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, | 1012 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, |
1013 | png_error_ptr warn_fn), | 1013 | png_error_ptr warn_fn), |
1014 | PNG_ALLOCATED); | 1014 | PNG_ALLOCATED); |
1015 | 1015 | ||
1016 | PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size, | 1016 | PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size, |
1017 | (png_const_structp png_ptr)); | 1017 | (png_const_structp png_ptr)); |
1018 | 1018 | ||
1019 | PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr, | 1019 | PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structp png_ptr, |
1020 | png_size_t size)); | 1020 | png_size_t size)); |
1021 | 1021 | ||
1022 | /* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp | 1022 | /* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp |
1023 | * match up. | 1023 | * match up. |
1024 | */ | 1024 | */ |
1025 | #ifdef PNG_SETJMP_SUPPORTED | 1025 | #ifdef PNG_SETJMP_SUPPORTED |
1026 | /* This function returns the jmp_buf built in to *png_ptr. It must be | 1026 | /* This function returns the jmp_buf built in to *png_ptr. It must be |
1027 | * supplied with an appropriate 'longjmp' function to use on that jmp_buf | 1027 | * supplied with an appropriate 'longjmp' function to use on that jmp_buf |
1028 | * unless the default error function is overridden in which case NULL is | 1028 | * unless the default error function is overridden in which case NULL is |
1029 | * acceptable. The size of the jmp_buf is checked against the actual size | 1029 | * acceptable. The size of the jmp_buf is checked against the actual size |
1030 | * allocated by the library - the call will return NULL on a mismatch | 1030 | * allocated by the library - the call will return NULL on a mismatch |
1031 | * indicating an ABI mismatch. | 1031 | * indicating an ABI mismatch. |
1032 | */ | 1032 | */ |
1033 | PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr, | 1033 | PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structp png_ptr, |
1034 | png_longjmp_ptr longjmp_fn, size_t jmp_buf_size)); | 1034 | png_longjmp_ptr longjmp_fn, size_t jmp_buf_size)); |
1035 | # define png_jmpbuf(png_ptr) \ | 1035 | # define png_jmpbuf(png_ptr) \ |
1036 | (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf))) | 1036 | (*png_set_longjmp_fn((png_ptr), longjmp, sizeof (jmp_buf))) |
1037 | #else | 1037 | #else |
1038 | # define png_jmpbuf(png_ptr) \ | 1038 | # define png_jmpbuf(png_ptr) \ |
1039 | (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP) | 1039 | (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP) |
1040 | #endif | 1040 | #endif |
1041 | /* This function should be used by libpng applications in place of | 1041 | /* This function should be used by libpng applications in place of |
1042 | * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it | 1042 | * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it |
1043 | * will use it; otherwise it will call PNG_ABORT(). This function was | 1043 | * will use it; otherwise it will call PNG_ABORT(). This function was |
1044 | * added in libpng-1.5.0. | 1044 | * added in libpng-1.5.0. |
1045 | */ | 1045 | */ |
1046 | PNG_EXPORTA(9, void, png_longjmp, (png_structp png_ptr, int val), | 1046 | PNG_EXPORTA(9, void, png_longjmp, (png_structp png_ptr, int val), |
1047 | PNG_NORETURN); | 1047 | PNG_NORETURN); |
1048 | 1048 | ||
1049 | #ifdef PNG_READ_SUPPORTED | 1049 | #ifdef PNG_READ_SUPPORTED |
1050 | /* Reset the compression stream */ | 1050 | /* Reset the compression stream */ |
1051 | PNG_EXPORT(10, int, png_reset_zstream, (png_structp png_ptr)); | 1051 | PNG_EXPORT(10, int, png_reset_zstream, (png_structp png_ptr)); |
1052 | #endif | 1052 | #endif |
1053 | 1053 | ||
1054 | /* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */ | 1054 | /* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */ |
1055 | #ifdef PNG_USER_MEM_SUPPORTED | 1055 | #ifdef PNG_USER_MEM_SUPPORTED |
1056 | PNG_EXPORTA(11, png_structp, png_create_read_struct_2, | 1056 | PNG_EXPORTA(11, png_structp, png_create_read_struct_2, |
1057 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, | 1057 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, |
1058 | png_error_ptr warn_fn, | 1058 | png_error_ptr warn_fn, |
1059 | png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), | 1059 | png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), |
1060 | PNG_ALLOCATED); | 1060 | PNG_ALLOCATED); |
1061 | PNG_EXPORTA(12, png_structp, png_create_write_struct_2, | 1061 | PNG_EXPORTA(12, png_structp, png_create_write_struct_2, |
1062 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, | 1062 | (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn, |
1063 | png_error_ptr warn_fn, | 1063 | png_error_ptr warn_fn, |
1064 | png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), | 1064 | png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn), |
1065 | PNG_ALLOCATED); | 1065 | PNG_ALLOCATED); |
1066 | #endif | 1066 | #endif |
1067 | 1067 | ||
1068 | /* Write the PNG file signature. */ | 1068 | /* Write the PNG file signature. */ |
1069 | PNG_EXPORT(13, void, png_write_sig, (png_structp png_ptr)); | 1069 | PNG_EXPORT(13, void, png_write_sig, (png_structp png_ptr)); |
1070 | 1070 | ||
1071 | /* Write a PNG chunk - size, type, (optional) data, CRC. */ | 1071 | /* Write a PNG chunk - size, type, (optional) data, CRC. */ |
1072 | PNG_EXPORT(14, void, png_write_chunk, (png_structp png_ptr, png_const_bytep | 1072 | PNG_EXPORT(14, void, png_write_chunk, (png_structp png_ptr, png_const_bytep |
1073 | chunk_name, png_const_bytep data, png_size_t length)); | 1073 | chunk_name, png_const_bytep data, png_size_t length)); |
1074 | 1074 | ||
1075 | /* Write the start of a PNG chunk - length and chunk name. */ | 1075 | /* Write the start of a PNG chunk - length and chunk name. */ |
1076 | PNG_EXPORT(15, void, png_write_chunk_start, (png_structp png_ptr, | 1076 | PNG_EXPORT(15, void, png_write_chunk_start, (png_structp png_ptr, |
1077 | png_const_bytep chunk_name, png_uint_32 length)); | 1077 | png_const_bytep chunk_name, png_uint_32 length)); |
1078 | 1078 | ||
1079 | /* Write the data of a PNG chunk started with png_write_chunk_start(). */ | 1079 | /* Write the data of a PNG chunk started with png_write_chunk_start(). */ |
1080 | PNG_EXPORT(16, void, png_write_chunk_data, (png_structp png_ptr, | 1080 | PNG_EXPORT(16, void, png_write_chunk_data, (png_structp png_ptr, |
1081 | png_const_bytep data, png_size_t length)); | 1081 | png_const_bytep data, png_size_t length)); |
1082 | 1082 | ||
1083 | /* Finish a chunk started with png_write_chunk_start() (includes CRC). */ | 1083 | /* Finish a chunk started with png_write_chunk_start() (includes CRC). */ |
1084 | PNG_EXPORT(17, void, png_write_chunk_end, (png_structp png_ptr)); | 1084 | PNG_EXPORT(17, void, png_write_chunk_end, (png_structp png_ptr)); |
1085 | 1085 | ||
1086 | /* Allocate and initialize the info structure */ | 1086 | /* Allocate and initialize the info structure */ |
1087 | PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_structp png_ptr), | 1087 | PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_structp png_ptr), |
1088 | PNG_ALLOCATED); | 1088 | PNG_ALLOCATED); |
1089 | 1089 | ||
1090 | PNG_EXPORT(19, void, png_info_init_3, (png_infopp info_ptr, | 1090 | PNG_EXPORT(19, void, png_info_init_3, (png_infopp info_ptr, |
1091 | png_size_t png_info_struct_size)); | 1091 | png_size_t png_info_struct_size)); |
1092 | 1092 | ||
1093 | /* Writes all the PNG information before the image. */ | 1093 | /* Writes all the PNG information before the image. */ |
1094 | PNG_EXPORT(20, void, png_write_info_before_PLTE, | 1094 | PNG_EXPORT(20, void, png_write_info_before_PLTE, |
1095 | (png_structp png_ptr, png_infop info_ptr)); | 1095 | (png_structp png_ptr, png_infop info_ptr)); |
1096 | PNG_EXPORT(21, void, png_write_info, | 1096 | PNG_EXPORT(21, void, png_write_info, |
1097 | (png_structp png_ptr, png_infop info_ptr)); | 1097 | (png_structp png_ptr, png_infop info_ptr)); |
1098 | 1098 | ||
1099 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED | 1099 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
1100 | /* Read the information before the actual image data. */ | 1100 | /* Read the information before the actual image data. */ |
1101 | PNG_EXPORT(22, void, png_read_info, | 1101 | PNG_EXPORT(22, void, png_read_info, |
1102 | (png_structp png_ptr, png_infop info_ptr)); | 1102 | (png_structp png_ptr, png_infop info_ptr)); |
1103 | #endif | 1103 | #endif |
1104 | 1104 | ||
1105 | #ifdef PNG_TIME_RFC1123_SUPPORTED | 1105 | #ifdef PNG_TIME_RFC1123_SUPPORTED |
1106 | PNG_EXPORT(23, png_const_charp, png_convert_to_rfc1123, | 1106 | PNG_EXPORT(23, png_const_charp, png_convert_to_rfc1123, |
1107 | (png_structp png_ptr, | 1107 | (png_structp png_ptr, |
1108 | png_const_timep ptime)); | 1108 | png_const_timep ptime)); |
1109 | #endif | 1109 | #endif |
1110 | 1110 | ||
1111 | #ifdef PNG_CONVERT_tIME_SUPPORTED | 1111 | #ifdef PNG_CONVERT_tIME_SUPPORTED |
1112 | /* Convert from a struct tm to png_time */ | 1112 | /* Convert from a struct tm to png_time */ |
1113 | PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime, | 1113 | PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime, |
1114 | PNG_CONST struct tm FAR * ttime)); | 1114 | PNG_CONST struct tm FAR * ttime)); |
1115 | 1115 | ||
1116 | /* Convert from time_t to png_time. Uses gmtime() */ | 1116 | /* Convert from time_t to png_time. Uses gmtime() */ |
1117 | PNG_EXPORT(25, void, png_convert_from_time_t, | 1117 | PNG_EXPORT(25, void, png_convert_from_time_t, |
1118 | (png_timep ptime, time_t ttime)); | 1118 | (png_timep ptime, time_t ttime)); |
1119 | #endif /* PNG_CONVERT_tIME_SUPPORTED */ | 1119 | #endif /* PNG_CONVERT_tIME_SUPPORTED */ |
1120 | 1120 | ||
1121 | #ifdef PNG_READ_EXPAND_SUPPORTED | 1121 | #ifdef PNG_READ_EXPAND_SUPPORTED |
1122 | /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ | 1122 | /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ |
1123 | PNG_EXPORT(26, void, png_set_expand, (png_structp png_ptr)); | 1123 | PNG_EXPORT(26, void, png_set_expand, (png_structp png_ptr)); |
1124 | PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structp png_ptr)); | 1124 | PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structp png_ptr)); |
1125 | PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structp png_ptr)); | 1125 | PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structp png_ptr)); |
1126 | PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structp png_ptr)); | 1126 | PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structp png_ptr)); |
1127 | #endif | 1127 | #endif |
1128 | 1128 | ||
1129 | #ifdef PNG_READ_EXPAND_16_SUPPORTED | 1129 | #ifdef PNG_READ_EXPAND_16_SUPPORTED |
1130 | /* Expand to 16-bit channels, forces conversion of palette to RGB and expansion | 1130 | /* Expand to 16-bit channels, forces conversion of palette to RGB and expansion |
1131 | * of a tRNS chunk if present. | 1131 | * of a tRNS chunk if present. |
1132 | */ | 1132 | */ |
1133 | PNG_EXPORT(221, void, png_set_expand_16, (png_structp png_ptr)); | 1133 | PNG_EXPORT(221, void, png_set_expand_16, (png_structp png_ptr)); |
1134 | #endif | 1134 | #endif |
1135 | 1135 | ||
1136 | #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) | 1136 | #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) |
1137 | /* Use blue, green, red order for pixels. */ | 1137 | /* Use blue, green, red order for pixels. */ |
1138 | PNG_EXPORT(30, void, png_set_bgr, (png_structp png_ptr)); | 1138 | PNG_EXPORT(30, void, png_set_bgr, (png_structp png_ptr)); |
1139 | #endif | 1139 | #endif |
1140 | 1140 | ||
1141 | #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED | 1141 | #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED |
1142 | /* Expand the grayscale to 24-bit RGB if necessary. */ | 1142 | /* Expand the grayscale to 24-bit RGB if necessary. */ |
1143 | PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr)); | 1143 | PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structp png_ptr)); |
1144 | #endif | 1144 | #endif |
1145 | 1145 | ||
1146 | #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED | 1146 | #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED |
1147 | /* Reduce RGB to grayscale. */ | 1147 | /* Reduce RGB to grayscale. */ |
1148 | #define PNG_ERROR_ACTION_NONE 1 | 1148 | #define PNG_ERROR_ACTION_NONE 1 |
1149 | #define PNG_ERROR_ACTION_WARN 2 | 1149 | #define PNG_ERROR_ACTION_WARN 2 |
1150 | #define PNG_ERROR_ACTION_ERROR 3 | 1150 | #define PNG_ERROR_ACTION_ERROR 3 |
1151 | #define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/ | 1151 | #define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/ |
1152 | 1152 | ||
1153 | PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr, | 1153 | PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structp png_ptr, |
1154 | int error_action, double red, double green)); | 1154 | int error_action, double red, double green)); |
1155 | PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr, | 1155 | PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structp png_ptr, |
1156 | int error_action, png_fixed_point red, png_fixed_point green)); | 1156 | int error_action, png_fixed_point red, png_fixed_point green)); |
1157 | 1157 | ||
1158 | PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp | 1158 | PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structp |
1159 | png_ptr)); | 1159 | png_ptr)); |
1160 | #endif | 1160 | #endif |
1161 | 1161 | ||
1162 | #ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED | 1162 | #ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED |
1163 | PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth, | 1163 | PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth, |
1164 | png_colorp palette)); | 1164 | png_colorp palette)); |
1165 | #endif | 1165 | #endif |
1166 | 1166 | ||
1167 | #ifdef PNG_READ_ALPHA_MODE_SUPPORTED | 1167 | #ifdef PNG_READ_ALPHA_MODE_SUPPORTED |
1168 | /* How the alpha channel is interpreted - this affects how the color channels of | 1168 | /* How the alpha channel is interpreted - this affects how the color channels of |
1169 | * a PNG file are returned when an alpha channel, or tRNS chunk in a palette | 1169 | * a PNG file are returned when an alpha channel, or tRNS chunk in a palette |
1170 | * file, is present. | 1170 | * file, is present. |
1171 | * | 1171 | * |
1172 | * This has no effect on the way pixels are written into a PNG output | 1172 | * This has no effect on the way pixels are written into a PNG output |
1173 | * datastream. The color samples in a PNG datastream are never premultiplied | 1173 | * datastream. The color samples in a PNG datastream are never premultiplied |
1174 | * with the alpha samples. | 1174 | * with the alpha samples. |
1175 | * | 1175 | * |
1176 | * The default is to return data according to the PNG specification: the alpha | 1176 | * The default is to return data according to the PNG specification: the alpha |
1177 | * channel is a linear measure of the contribution of the pixel to the | 1177 | * channel is a linear measure of the contribution of the pixel to the |
1178 | * corresponding composited pixel. The gamma encoded color channels must be | 1178 | * corresponding composited pixel. The gamma encoded color channels must be |
1179 | * scaled according to the contribution and to do this it is necessary to undo | 1179 | * scaled according to the contribution and to do this it is necessary to undo |
1180 | * the encoding, scale the color values, perform the composition and reencode | 1180 | * the encoding, scale the color values, perform the composition and reencode |
1181 | * the values. This is the 'PNG' mode. | 1181 | * the values. This is the 'PNG' mode. |
1182 | * | 1182 | * |
1183 | * The alternative is to 'associate' the alpha with the color information by | 1183 | * The alternative is to 'associate' the alpha with the color information by |
1184 | * storing color channel values that have been scaled by the alpha. The | 1184 | * storing color channel values that have been scaled by the alpha. The |
1185 | * advantage is that the color channels can be resampled (the image can be | 1185 | * advantage is that the color channels can be resampled (the image can be |
1186 | * scaled) in this form. The disadvantage is that normal practice is to store | 1186 | * scaled) in this form. The disadvantage is that normal practice is to store |
1187 | * linear, not (gamma) encoded, values and this requires 16-bit channels for | 1187 | * linear, not (gamma) encoded, values and this requires 16-bit channels for |
1188 | * still images rather than the 8-bit channels that are just about sufficient if | 1188 | * still images rather than the 8-bit channels that are just about sufficient if |
1189 | * gamma encoding is used. In addition all non-transparent pixel values, | 1189 | * gamma encoding is used. In addition all non-transparent pixel values, |
1190 | * including completely opaque ones, must be gamma encoded to produce the final | 1190 | * including completely opaque ones, must be gamma encoded to produce the final |
1191 | * image. This is the 'STANDARD', 'ASSOCIATED' or 'PREMULTIPLIED' mode (the | 1191 | * image. This is the 'STANDARD', 'ASSOCIATED' or 'PREMULTIPLIED' mode (the |
1192 | * latter being the two common names for associated alpha color channels.) | 1192 | * latter being the two common names for associated alpha color channels.) |
1193 | * | 1193 | * |
1194 | * Since it is not necessary to perform arithmetic on opaque color values so | 1194 | * Since it is not necessary to perform arithmetic on opaque color values so |
1195 | * long as they are not to be resampled and are in the final color space it is | 1195 | * long as they are not to be resampled and are in the final color space it is |
1196 | * possible to optimize the handling of alpha by storing the opaque pixels in | 1196 | * possible to optimize the handling of alpha by storing the opaque pixels in |
1197 | * the PNG format (adjusted for the output color space) while storing partially | 1197 | * the PNG format (adjusted for the output color space) while storing partially |
1198 | * opaque pixels in the standard, linear, format. The accuracy required for | 1198 | * opaque pixels in the standard, linear, format. The accuracy required for |
1199 | * standard alpha composition is relatively low, because the pixels are | 1199 | * standard alpha composition is relatively low, because the pixels are |
1200 | * isolated, therefore typically the accuracy loss in storing 8-bit linear | 1200 | * isolated, therefore typically the accuracy loss in storing 8-bit linear |
1201 | * values is acceptable. (This is not true if the alpha channel is used to | 1201 | * values is acceptable. (This is not true if the alpha channel is used to |
1202 | * simulate transparency over large areas - use 16 bits or the PNG mode in | 1202 | * simulate transparency over large areas - use 16 bits or the PNG mode in |
1203 | * this case!) This is the 'OPTIMIZED' mode. For this mode a pixel is | 1203 | * this case!) This is the 'OPTIMIZED' mode. For this mode a pixel is |
1204 | * treated as opaque only if the alpha value is equal to the maximum value. | 1204 | * treated as opaque only if the alpha value is equal to the maximum value. |
1205 | * | 1205 | * |
1206 | * The final choice is to gamma encode the alpha channel as well. This is | 1206 | * The final choice is to gamma encode the alpha channel as well. This is |
1207 | * broken because, in practice, no implementation that uses this choice | 1207 | * broken because, in practice, no implementation that uses this choice |
1208 | * correctly undoes the encoding before handling alpha composition. Use this | 1208 | * correctly undoes the encoding before handling alpha composition. Use this |
1209 | * choice only if other serious errors in the software or hardware you use | 1209 | * choice only if other serious errors in the software or hardware you use |
1210 | * mandate it; the typical serious error is for dark halos to appear around | 1210 | * mandate it; the typical serious error is for dark halos to appear around |
1211 | * opaque areas of the composited PNG image because of arithmetic overflow. | 1211 | * opaque areas of the composited PNG image because of arithmetic overflow. |
1212 | * | 1212 | * |
1213 | * The API function png_set_alpha_mode specifies which of these choices to use | 1213 | * The API function png_set_alpha_mode specifies which of these choices to use |
1214 | * with an enumerated 'mode' value and the gamma of the required output: | 1214 | * with an enumerated 'mode' value and the gamma of the required output: |
1215 | */ | 1215 | */ |
1216 | #define PNG_ALPHA_PNG 0 /* according to the PNG standard */ | 1216 | #define PNG_ALPHA_PNG 0 /* according to the PNG standard */ |
1217 | #define PNG_ALPHA_STANDARD 1 /* according to Porter/Duff */ | 1217 | #define PNG_ALPHA_STANDARD 1 /* according to Porter/Duff */ |
1218 | #define PNG_ALPHA_ASSOCIATED 1 /* as above; this is the normal practice */ | 1218 | #define PNG_ALPHA_ASSOCIATED 1 /* as above; this is the normal practice */ |
1219 | #define PNG_ALPHA_PREMULTIPLIED 1 /* as above */ | 1219 | #define PNG_ALPHA_PREMULTIPLIED 1 /* as above */ |
1220 | #define PNG_ALPHA_OPTIMIZED 2 /* 'PNG' for opaque pixels, else 'STANDARD' */ | 1220 | #define PNG_ALPHA_OPTIMIZED 2 /* 'PNG' for opaque pixels, else 'STANDARD' */ |
1221 | #define PNG_ALPHA_BROKEN 3 /* the alpha channel is gamma encoded */ | 1221 | #define PNG_ALPHA_BROKEN 3 /* the alpha channel is gamma encoded */ |
1222 | 1222 | ||
1223 | PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structp png_ptr, int mode, | 1223 | PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structp png_ptr, int mode, |
1224 | double output_gamma)); | 1224 | double output_gamma)); |
1225 | PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structp png_ptr, | 1225 | PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structp png_ptr, |
1226 | int mode, png_fixed_point output_gamma)); | 1226 | int mode, png_fixed_point output_gamma)); |
1227 | #endif | 1227 | #endif |
1228 | 1228 | ||
1229 | #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED) | 1229 | #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED) |
1230 | /* The output_gamma value is a screen gamma in libpng terminology: it expresses | 1230 | /* The output_gamma value is a screen gamma in libpng terminology: it expresses |
1231 | * how to decode the output values, not how they are encoded. The values used | 1231 | * how to decode the output values, not how they are encoded. The values used |
1232 | * correspond to the normal numbers used to describe the overall gamma of a | 1232 | * correspond to the normal numbers used to describe the overall gamma of a |
1233 | * computer display system; for example 2.2 for an sRGB conformant system. The | 1233 | * computer display system; for example 2.2 for an sRGB conformant system. The |
1234 | * values are scaled by 100000 in the _fixed version of the API (so 220000 for | 1234 | * values are scaled by 100000 in the _fixed version of the API (so 220000 for |
1235 | * sRGB.) | 1235 | * sRGB.) |
1236 | * | 1236 | * |
1237 | * The inverse of the value is always used to provide a default for the PNG file | 1237 | * The inverse of the value is always used to provide a default for the PNG file |
1238 | * encoding if it has no gAMA chunk and if png_set_gamma() has not been called | 1238 | * encoding if it has no gAMA chunk and if png_set_gamma() has not been called |
1239 | * to override the PNG gamma information. | 1239 | * to override the PNG gamma information. |
1240 | * | 1240 | * |
1241 | * When the ALPHA_OPTIMIZED mode is selected the output gamma is used to encode | 1241 | * When the ALPHA_OPTIMIZED mode is selected the output gamma is used to encode |
1242 | * opaque pixels however pixels with lower alpha values are not encoded, | 1242 | * opaque pixels however pixels with lower alpha values are not encoded, |
1243 | * regardless of the output gamma setting. | 1243 | * regardless of the output gamma setting. |
1244 | * | 1244 | * |
1245 | * When the standard Porter Duff handling is requested with mode 1 the output | 1245 | * When the standard Porter Duff handling is requested with mode 1 the output |
1246 | * encoding is set to be linear and the output_gamma value is only relevant | 1246 | * encoding is set to be linear and the output_gamma value is only relevant |
1247 | * as a default for input data that has no gamma information. The linear output | 1247 | * as a default for input data that has no gamma information. The linear output |
1248 | * encoding will be overridden if png_set_gamma() is called - the results may be | 1248 | * encoding will be overridden if png_set_gamma() is called - the results may be |
1249 | * highly unexpected! | 1249 | * highly unexpected! |
1250 | * | 1250 | * |
1251 | * The following numbers are derived from the sRGB standard and the research | 1251 | * The following numbers are derived from the sRGB standard and the research |
1252 | * behind it. sRGB is defined to be approximated by a PNG gAMA chunk value of | 1252 | * behind it. sRGB is defined to be approximated by a PNG gAMA chunk value of |
1253 | * 0.45455 (1/2.2) for PNG. The value implicitly includes any viewing | 1253 | * 0.45455 (1/2.2) for PNG. The value implicitly includes any viewing |
1254 | * correction required to take account of any differences in the color | 1254 | * correction required to take account of any differences in the color |
1255 | * environment of the original scene and the intended display environment; the | 1255 | * environment of the original scene and the intended display environment; the |
1256 | * value expresses how to *decode* the image for display, not how the original | 1256 | * value expresses how to *decode* the image for display, not how the original |
1257 | * data was *encoded*. | 1257 | * data was *encoded*. |
1258 | * | 1258 | * |
1259 | * sRGB provides a peg for the PNG standard by defining a viewing environment. | 1259 | * sRGB provides a peg for the PNG standard by defining a viewing environment. |
1260 | * sRGB itself, and earlier TV standards, actually use a more complex transform | 1260 | * sRGB itself, and earlier TV standards, actually use a more complex transform |
1261 | * (a linear portion then a gamma 2.4 power law) than PNG can express. (PNG is | 1261 | * (a linear portion then a gamma 2.4 power law) than PNG can express. (PNG is |
1262 | * limited to simple power laws.) By saying that an image for direct display on | 1262 | * limited to simple power laws.) By saying that an image for direct display on |
1263 | * an sRGB conformant system should be stored with a gAMA chunk value of 45455 | 1263 | * an sRGB conformant system should be stored with a gAMA chunk value of 45455 |
1264 | * (11.3.3.2 and 11.3.3.5 of the ISO PNG specification) the PNG specification | 1264 | * (11.3.3.2 and 11.3.3.5 of the ISO PNG specification) the PNG specification |
1265 | * makes it possible to derive values for other display systems and | 1265 | * makes it possible to derive values for other display systems and |
1266 | * environments. | 1266 | * environments. |
1267 | * | 1267 | * |
1268 | * The Mac value is deduced from the sRGB based on an assumption that the actual | 1268 | * The Mac value is deduced from the sRGB based on an assumption that the actual |
1269 | * extra viewing correction used in early Mac display systems was implemented as | 1269 | * extra viewing correction used in early Mac display systems was implemented as |
1270 | * a power 1.45 lookup table. | 1270 | * a power 1.45 lookup table. |
1271 | * | 1271 | * |
1272 | * Any system where a programmable lookup table is used or where the behavior of | 1272 | * Any system where a programmable lookup table is used or where the behavior of |
1273 | * the final display device characteristics can be changed requires system | 1273 | * the final display device characteristics can be changed requires system |
1274 | * specific code to obtain the current characteristic. However this can be | 1274 | * specific code to obtain the current characteristic. However this can be |
1275 | * difficult and most PNG gamma correction only requires an approximate value. | 1275 | * difficult and most PNG gamma correction only requires an approximate value. |
1276 | * | 1276 | * |
1277 | * By default, if png_set_alpha_mode() is not called, libpng assumes that all | 1277 | * By default, if png_set_alpha_mode() is not called, libpng assumes that all |
1278 | * values are unencoded, linear, values and that the output device also has a | 1278 | * values are unencoded, linear, values and that the output device also has a |
1279 | * linear characteristic. This is only very rarely correct - it is invariably | 1279 | * linear characteristic. This is only very rarely correct - it is invariably |
1280 | * better to call png_set_alpha_mode() with PNG_DEFAULT_sRGB than rely on the | 1280 | * better to call png_set_alpha_mode() with PNG_DEFAULT_sRGB than rely on the |
1281 | * default if you don't know what the right answer is! | 1281 | * default if you don't know what the right answer is! |
1282 | * | 1282 | * |
1283 | * The special value PNG_GAMMA_MAC_18 indicates an older Mac system (pre Mac OS | 1283 | * The special value PNG_GAMMA_MAC_18 indicates an older Mac system (pre Mac OS |
1284 | * 10.6) which used a correction table to implement a somewhat lower gamma on an | 1284 | * 10.6) which used a correction table to implement a somewhat lower gamma on an |
1285 | * otherwise sRGB system. | 1285 | * otherwise sRGB system. |
1286 | * | 1286 | * |
1287 | * Both these values are reserved (not simple gamma values) in order to allow | 1287 | * Both these values are reserved (not simple gamma values) in order to allow |
1288 | * more precise correction internally in the future. | 1288 | * more precise correction internally in the future. |
1289 | * | 1289 | * |
1290 | * NOTE: the following values can be passed to either the fixed or floating | 1290 | * NOTE: the following values can be passed to either the fixed or floating |
1291 | * point APIs, but the floating point API will also accept floating point | 1291 | * point APIs, but the floating point API will also accept floating point |
1292 | * values. | 1292 | * values. |
1293 | */ | 1293 | */ |
1294 | #define PNG_DEFAULT_sRGB -1 /* sRGB gamma and color space */ | 1294 | #define PNG_DEFAULT_sRGB -1 /* sRGB gamma and color space */ |
1295 | #define PNG_GAMMA_MAC_18 -2 /* Old Mac '1.8' gamma and color space */ | 1295 | #define PNG_GAMMA_MAC_18 -2 /* Old Mac '1.8' gamma and color space */ |
1296 | #define PNG_GAMMA_sRGB 220000 /* Television standards--matches sRGB gamma */ | 1296 | #define PNG_GAMMA_sRGB 220000 /* Television standards--matches sRGB gamma */ |
1297 | #define PNG_GAMMA_LINEAR PNG_FP_1 /* Linear */ | 1297 | #define PNG_GAMMA_LINEAR PNG_FP_1 /* Linear */ |
1298 | #endif | 1298 | #endif |
1299 | 1299 | ||
1300 | /* The following are examples of calls to png_set_alpha_mode to achieve the | 1300 | /* The following are examples of calls to png_set_alpha_mode to achieve the |
1301 | * required overall gamma correction and, where necessary, alpha | 1301 | * required overall gamma correction and, where necessary, alpha |
1302 | * premultiplication. | 1302 | * premultiplication. |
1303 | * | 1303 | * |
1304 | * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB); | 1304 | * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB); |
1305 | * This is the default libpng handling of the alpha channel - it is not | 1305 | * This is the default libpng handling of the alpha channel - it is not |
1306 | * pre-multiplied into the color components. In addition the call states | 1306 | * pre-multiplied into the color components. In addition the call states |
1307 | * that the output is for a sRGB system and causes all PNG files without gAMA | 1307 | * that the output is for a sRGB system and causes all PNG files without gAMA |
1308 | * chunks to be assumed to be encoded using sRGB. | 1308 | * chunks to be assumed to be encoded using sRGB. |
1309 | * | 1309 | * |
1310 | * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC); | 1310 | * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC); |
1311 | * In this case the output is assumed to be something like an sRGB conformant | 1311 | * In this case the output is assumed to be something like an sRGB conformant |
1312 | * display preceeded by a power-law lookup table of power 1.45. This is how | 1312 | * display preceeded by a power-law lookup table of power 1.45. This is how |
1313 | * early Mac systems behaved. | 1313 | * early Mac systems behaved. |
1314 | * | 1314 | * |
1315 | * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_GAMMA_LINEAR); | 1315 | * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_GAMMA_LINEAR); |
1316 | * This is the classic Jim Blinn approach and will work in academic | 1316 | * This is the classic Jim Blinn approach and will work in academic |
1317 | * environments where everything is done by the book. It has the shortcoming | 1317 | * environments where everything is done by the book. It has the shortcoming |
1318 | * of assuming that input PNG data with no gamma information is linear - this | 1318 | * of assuming that input PNG data with no gamma information is linear - this |
1319 | * is unlikely to be correct unless the PNG files where generated locally. | 1319 | * is unlikely to be correct unless the PNG files where generated locally. |
1320 | * Most of the time the output precision will be so low as to show | 1320 | * Most of the time the output precision will be so low as to show |
1321 | * significant banding in dark areas of the image. | 1321 | * significant banding in dark areas of the image. |
1322 | * | 1322 | * |
1323 | * png_set_expand_16(pp); | 1323 | * png_set_expand_16(pp); |
1324 | * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_DEFAULT_sRGB); | 1324 | * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_DEFAULT_sRGB); |
1325 | * This is a somewhat more realistic Jim Blinn inspired approach. PNG files | 1325 | * This is a somewhat more realistic Jim Blinn inspired approach. PNG files |
1326 | * are assumed to have the sRGB encoding if not marked with a gamma value and | 1326 | * are assumed to have the sRGB encoding if not marked with a gamma value and |
1327 | * the output is always 16 bits per component. This permits accurate scaling | 1327 | * the output is always 16 bits per component. This permits accurate scaling |
1328 | * and processing of the data. If you know that your input PNG files were | 1328 | * and processing of the data. If you know that your input PNG files were |
1329 | * generated locally you might need to replace PNG_DEFAULT_sRGB with the | 1329 | * generated locally you might need to replace PNG_DEFAULT_sRGB with the |
1330 | * correct value for your system. | 1330 | * correct value for your system. |
1331 | * | 1331 | * |
1332 | * png_set_alpha_mode(pp, PNG_ALPHA_OPTIMIZED, PNG_DEFAULT_sRGB); | 1332 | * png_set_alpha_mode(pp, PNG_ALPHA_OPTIMIZED, PNG_DEFAULT_sRGB); |
1333 | * If you just need to composite the PNG image onto an existing background | 1333 | * If you just need to composite the PNG image onto an existing background |
1334 | * and if you control the code that does this you can use the optimization | 1334 | * and if you control the code that does this you can use the optimization |
1335 | * setting. In this case you just copy completely opaque pixels to the | 1335 | * setting. In this case you just copy completely opaque pixels to the |
1336 | * output. For pixels that are not completely transparent (you just skip | 1336 | * output. For pixels that are not completely transparent (you just skip |
1337 | * those) you do the composition math using png_composite or png_composite_16 | 1337 | * those) you do the composition math using png_composite or png_composite_16 |
1338 | * below then encode the resultant 8-bit or 16-bit values to match the output | 1338 | * below then encode the resultant 8-bit or 16-bit values to match the output |
1339 | * encoding. | 1339 | * encoding. |
1340 | * | 1340 | * |
1341 | * Other cases | 1341 | * Other cases |
1342 | * If neither the PNG nor the standard linear encoding work for you because | 1342 | * If neither the PNG nor the standard linear encoding work for you because |
1343 | * of the software or hardware you use then you have a big problem. The PNG | 1343 | * of the software or hardware you use then you have a big problem. The PNG |
1344 | * case will probably result in halos around the image. The linear encoding | 1344 | * case will probably result in halos around the image. The linear encoding |
1345 | * will probably result in a washed out, too bright, image (it's actually too | 1345 | * will probably result in a washed out, too bright, image (it's actually too |
1346 | * contrasty.) Try the ALPHA_OPTIMIZED mode above - this will probably | 1346 | * contrasty.) Try the ALPHA_OPTIMIZED mode above - this will probably |
1347 | * substantially reduce the halos. Alternatively try: | 1347 | * substantially reduce the halos. Alternatively try: |
1348 | * | 1348 | * |
1349 | * png_set_alpha_mode(pp, PNG_ALPHA_BROKEN, PNG_DEFAULT_sRGB); | 1349 | * png_set_alpha_mode(pp, PNG_ALPHA_BROKEN, PNG_DEFAULT_sRGB); |
1350 | * This option will also reduce the halos, but there will be slight dark | 1350 | * This option will also reduce the halos, but there will be slight dark |
1351 | * halos round the opaque parts of the image where the background is light. | 1351 | * halos round the opaque parts of the image where the background is light. |
1352 | * In the OPTIMIZED mode the halos will be light halos where the background | 1352 | * In the OPTIMIZED mode the halos will be light halos where the background |
1353 | * is dark. Take your pick - the halos are unavoidable unless you can get | 1353 | * is dark. Take your pick - the halos are unavoidable unless you can get |
1354 | * your hardware/software fixed! (The OPTIMIZED approach is slightly | 1354 | * your hardware/software fixed! (The OPTIMIZED approach is slightly |
1355 | * faster.) | 1355 | * faster.) |
1356 | * | 1356 | * |
1357 | * When the default gamma of PNG files doesn't match the output gamma. | 1357 | * When the default gamma of PNG files doesn't match the output gamma. |
1358 | * If you have PNG files with no gamma information png_set_alpha_mode allows | 1358 | * If you have PNG files with no gamma information png_set_alpha_mode allows |
1359 | * you to provide a default gamma, but it also sets the ouput gamma to the | 1359 | * you to provide a default gamma, but it also sets the ouput gamma to the |
1360 | * matching value. If you know your PNG files have a gamma that doesn't | 1360 | * matching value. If you know your PNG files have a gamma that doesn't |
1361 | * match the output you can take advantage of the fact that | 1361 | * match the output you can take advantage of the fact that |
1362 | * png_set_alpha_mode always sets the output gamma but only sets the PNG | 1362 | * png_set_alpha_mode always sets the output gamma but only sets the PNG |
1363 | * default if it is not already set: | 1363 | * default if it is not already set: |
1364 | * | 1364 | * |
1365 | * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB); | 1365 | * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB); |
1366 | * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC); | 1366 | * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC); |
1367 | * The first call sets both the default and the output gamma values, the | 1367 | * The first call sets both the default and the output gamma values, the |
1368 | * second call overrides the output gamma without changing the default. This | 1368 | * second call overrides the output gamma without changing the default. This |
1369 | * is easier than achieving the same effect with png_set_gamma. You must use | 1369 | * is easier than achieving the same effect with png_set_gamma. You must use |
1370 | * PNG_ALPHA_PNG for the first call - internal checking in png_set_alpha will | 1370 | * PNG_ALPHA_PNG for the first call - internal checking in png_set_alpha will |
1371 | * fire if more than one call to png_set_alpha_mode and png_set_background is | 1371 | * fire if more than one call to png_set_alpha_mode and png_set_background is |
1372 | * made in the same read operation, however multiple calls with PNG_ALPHA_PNG | 1372 | * made in the same read operation, however multiple calls with PNG_ALPHA_PNG |
1373 | * are ignored. | 1373 | * are ignored. |
1374 | */ | 1374 | */ |
1375 | 1375 | ||
1376 | #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED | 1376 | #ifdef PNG_READ_STRIP_ALPHA_SUPPORTED |
1377 | PNG_EXPORT(36, void, png_set_strip_alpha, (png_structp png_ptr)); | 1377 | PNG_EXPORT(36, void, png_set_strip_alpha, (png_structp png_ptr)); |
1378 | #endif | 1378 | #endif |
1379 | 1379 | ||
1380 | #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ | 1380 | #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ |
1381 | defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) | 1381 | defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) |
1382 | PNG_EXPORT(37, void, png_set_swap_alpha, (png_structp png_ptr)); | 1382 | PNG_EXPORT(37, void, png_set_swap_alpha, (png_structp png_ptr)); |
1383 | #endif | 1383 | #endif |
1384 | 1384 | ||
1385 | #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ | 1385 | #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ |
1386 | defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) | 1386 | defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) |
1387 | PNG_EXPORT(38, void, png_set_invert_alpha, (png_structp png_ptr)); | 1387 | PNG_EXPORT(38, void, png_set_invert_alpha, (png_structp png_ptr)); |
1388 | #endif | 1388 | #endif |
1389 | 1389 | ||
1390 | #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) | 1390 | #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) |
1391 | /* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ | 1391 | /* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ |
1392 | PNG_EXPORT(39, void, png_set_filler, (png_structp png_ptr, png_uint_32 filler, | 1392 | PNG_EXPORT(39, void, png_set_filler, (png_structp png_ptr, png_uint_32 filler, |
1393 | int flags)); | 1393 | int flags)); |
1394 | /* The values of the PNG_FILLER_ defines should NOT be changed */ | 1394 | /* The values of the PNG_FILLER_ defines should NOT be changed */ |
1395 | # define PNG_FILLER_BEFORE 0 | 1395 | # define PNG_FILLER_BEFORE 0 |
1396 | # define PNG_FILLER_AFTER 1 | 1396 | # define PNG_FILLER_AFTER 1 |
1397 | /* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ | 1397 | /* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ |
1398 | PNG_EXPORT(40, void, png_set_add_alpha, | 1398 | PNG_EXPORT(40, void, png_set_add_alpha, |
1399 | (png_structp png_ptr, png_uint_32 filler, | 1399 | (png_structp png_ptr, png_uint_32 filler, |
1400 | int flags)); | 1400 | int flags)); |
1401 | #endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ | 1401 | #endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ |
1402 | 1402 | ||
1403 | #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) | 1403 | #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) |
1404 | /* Swap bytes in 16-bit depth files. */ | 1404 | /* Swap bytes in 16-bit depth files. */ |
1405 | PNG_EXPORT(41, void, png_set_swap, (png_structp png_ptr)); | 1405 | PNG_EXPORT(41, void, png_set_swap, (png_structp png_ptr)); |
1406 | #endif | 1406 | #endif |
1407 | 1407 | ||
1408 | #if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) | 1408 | #if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) |
1409 | /* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ | 1409 | /* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ |
1410 | PNG_EXPORT(42, void, png_set_packing, (png_structp png_ptr)); | 1410 | PNG_EXPORT(42, void, png_set_packing, (png_structp png_ptr)); |
1411 | #endif | 1411 | #endif |
1412 | 1412 | ||
1413 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ | 1413 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \ |
1414 | defined(PNG_WRITE_PACKSWAP_SUPPORTED) | 1414 | defined(PNG_WRITE_PACKSWAP_SUPPORTED) |
1415 | /* Swap packing order of pixels in bytes. */ | 1415 | /* Swap packing order of pixels in bytes. */ |
1416 | PNG_EXPORT(43, void, png_set_packswap, (png_structp png_ptr)); | 1416 | PNG_EXPORT(43, void, png_set_packswap, (png_structp png_ptr)); |
1417 | #endif | 1417 | #endif |
1418 | 1418 | ||
1419 | #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) | 1419 | #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) |
1420 | /* Converts files to legal bit depths. */ | 1420 | /* Converts files to legal bit depths. */ |
1421 | PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p | 1421 | PNG_EXPORT(44, void, png_set_shift, (png_structp png_ptr, png_const_color_8p |
1422 | true_bits)); | 1422 | true_bits)); |
1423 | #endif | 1423 | #endif |
1424 | 1424 | ||
1425 | #if defined(PNG_READ_INTERLACING_SUPPORTED) || \ | 1425 | #if defined(PNG_READ_INTERLACING_SUPPORTED) || \ |
1426 | defined(PNG_WRITE_INTERLACING_SUPPORTED) | 1426 | defined(PNG_WRITE_INTERLACING_SUPPORTED) |
1427 | /* Have the code handle the interlacing. Returns the number of passes. | 1427 | /* Have the code handle the interlacing. Returns the number of passes. |
1428 | * MUST be called before png_read_update_info or png_start_read_image, | 1428 | * MUST be called before png_read_update_info or png_start_read_image, |
1429 | * otherwise it will not have the desired effect. Note that it is still | 1429 | * otherwise it will not have the desired effect. Note that it is still |
1430 | * necessary to call png_read_row or png_read_rows png_get_image_height | 1430 | * necessary to call png_read_row or png_read_rows png_get_image_height |
1431 | * times for each pass. | 1431 | * times for each pass. |
1432 | */ | 1432 | */ |
1433 | PNG_EXPORT(45, int, png_set_interlace_handling, (png_structp png_ptr)); | 1433 | PNG_EXPORT(45, int, png_set_interlace_handling, (png_structp png_ptr)); |
1434 | #endif | 1434 | #endif |
1435 | 1435 | ||
1436 | #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) | 1436 | #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) |
1437 | /* Invert monochrome files */ | 1437 | /* Invert monochrome files */ |
1438 | PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr)); | 1438 | PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr)); |
1439 | #endif | 1439 | #endif |
1440 | 1440 | ||
1441 | #ifdef PNG_READ_BACKGROUND_SUPPORTED | 1441 | #ifdef PNG_READ_BACKGROUND_SUPPORTED |
1442 | /* Handle alpha and tRNS by replacing with a background color. Prior to | 1442 | /* Handle alpha and tRNS by replacing with a background color. Prior to |
1443 | * libpng-1.5.4 this API must not be called before the PNG file header has been | 1443 | * libpng-1.5.4 this API must not be called before the PNG file header has been |
1444 | * read. Doing so will result in unexpected behavior and possible warnings or | 1444 | * read. Doing so will result in unexpected behavior and possible warnings or |
1445 | * errors if the PNG file contains a bKGD chunk. | 1445 | * errors if the PNG file contains a bKGD chunk. |
1446 | */ | 1446 | */ |
1447 | PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr, | 1447 | PNG_FP_EXPORT(47, void, png_set_background, (png_structp png_ptr, |
1448 | png_const_color_16p background_color, int background_gamma_code, | 1448 | png_const_color_16p background_color, int background_gamma_code, |
1449 | int need_expand, double background_gamma)); | 1449 | int need_expand, double background_gamma)); |
1450 | PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr, | 1450 | PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structp png_ptr, |
1451 | png_const_color_16p background_color, int background_gamma_code, | 1451 | png_const_color_16p background_color, int background_gamma_code, |
1452 | int need_expand, png_fixed_point background_gamma)); | 1452 | int need_expand, png_fixed_point background_gamma)); |
1453 | #endif | 1453 | #endif |
1454 | #ifdef PNG_READ_BACKGROUND_SUPPORTED | 1454 | #ifdef PNG_READ_BACKGROUND_SUPPORTED |
1455 | # define PNG_BACKGROUND_GAMMA_UNKNOWN 0 | 1455 | # define PNG_BACKGROUND_GAMMA_UNKNOWN 0 |
1456 | # define PNG_BACKGROUND_GAMMA_SCREEN 1 | 1456 | # define PNG_BACKGROUND_GAMMA_SCREEN 1 |
1457 | # define PNG_BACKGROUND_GAMMA_FILE 2 | 1457 | # define PNG_BACKGROUND_GAMMA_FILE 2 |
1458 | # define PNG_BACKGROUND_GAMMA_UNIQUE 3 | 1458 | # define PNG_BACKGROUND_GAMMA_UNIQUE 3 |
1459 | #endif | 1459 | #endif |
1460 | 1460 | ||
1461 | #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED | 1461 | #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED |
1462 | /* Scale a 16-bit depth file down to 8-bit, accurately. */ | 1462 | /* Scale a 16-bit depth file down to 8-bit, accurately. */ |
1463 | PNG_EXPORT(229, void, png_set_scale_16, (png_structp png_ptr)); | 1463 | PNG_EXPORT(229, void, png_set_scale_16, (png_structp png_ptr)); |
1464 | #endif | 1464 | #endif |
1465 | 1465 | ||
1466 | #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED | 1466 | #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED |
1467 | #define PNG_READ_16_TO_8 SUPPORTED /* Name prior to 1.5.4 */ | 1467 | #define PNG_READ_16_TO_8 SUPPORTED /* Name prior to 1.5.4 */ |
1468 | /* Strip the second byte of information from a 16-bit depth file. */ | 1468 | /* Strip the second byte of information from a 16-bit depth file. */ |
1469 | PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr)); | 1469 | PNG_EXPORT(48, void, png_set_strip_16, (png_structp png_ptr)); |
1470 | #endif | 1470 | #endif |
1471 | 1471 | ||
1472 | #ifdef PNG_READ_QUANTIZE_SUPPORTED | 1472 | #ifdef PNG_READ_QUANTIZE_SUPPORTED |
1473 | /* Turn on quantizing, and reduce the palette to the number of colors | 1473 | /* Turn on quantizing, and reduce the palette to the number of colors |
1474 | * available. | 1474 | * available. |
1475 | */ | 1475 | */ |
1476 | PNG_EXPORT(49, void, png_set_quantize, | 1476 | PNG_EXPORT(49, void, png_set_quantize, |
1477 | (png_structp png_ptr, png_colorp palette, | 1477 | (png_structp png_ptr, png_colorp palette, |
1478 | int num_palette, int maximum_colors, png_const_uint_16p histogram, | 1478 | int num_palette, int maximum_colors, png_const_uint_16p histogram, |
1479 | int full_quantize)); | 1479 | int full_quantize)); |
1480 | #endif | 1480 | #endif |
1481 | 1481 | ||
1482 | #ifdef PNG_READ_GAMMA_SUPPORTED | 1482 | #ifdef PNG_READ_GAMMA_SUPPORTED |
1483 | /* The threshold on gamma processing is configurable but hard-wired into the | 1483 | /* The threshold on gamma processing is configurable but hard-wired into the |
1484 | * library. The following is the floating point variant. | 1484 | * library. The following is the floating point variant. |
1485 | */ | 1485 | */ |
1486 | #define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001) | 1486 | #define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001) |
1487 | 1487 | ||
1488 | /* Handle gamma correction. Screen_gamma=(display_exponent). | 1488 | /* Handle gamma correction. Screen_gamma=(display_exponent). |
1489 | * NOTE: this API simply sets the screen and file gamma values. It will | 1489 | * NOTE: this API simply sets the screen and file gamma values. It will |
1490 | * therefore override the value for gamma in a PNG file if it is called after | 1490 | * therefore override the value for gamma in a PNG file if it is called after |
1491 | * the file header has been read - use with care - call before reading the PNG | 1491 | * the file header has been read - use with care - call before reading the PNG |
1492 | * file for best results! | 1492 | * file for best results! |
1493 | * | 1493 | * |
1494 | * These routines accept the same gamma values as png_set_alpha_mode (described | 1494 | * These routines accept the same gamma values as png_set_alpha_mode (described |
1495 | * above). The PNG_GAMMA_ defines and PNG_DEFAULT_sRGB can be passed to either | 1495 | * above). The PNG_GAMMA_ defines and PNG_DEFAULT_sRGB can be passed to either |
1496 | * API (floating point or fixed.) Notice, however, that the 'file_gamma' value | 1496 | * API (floating point or fixed.) Notice, however, that the 'file_gamma' value |
1497 | * is the inverse of a 'screen gamma' value. | 1497 | * is the inverse of a 'screen gamma' value. |
1498 | */ | 1498 | */ |
1499 | PNG_FP_EXPORT(50, void, png_set_gamma, | 1499 | PNG_FP_EXPORT(50, void, png_set_gamma, |
1500 | (png_structp png_ptr, double screen_gamma, | 1500 | (png_structp png_ptr, double screen_gamma, |
1501 | double override_file_gamma)); | 1501 | double override_file_gamma)); |
1502 | PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr, | 1502 | PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structp png_ptr, |
1503 | png_fixed_point screen_gamma, png_fixed_point override_file_gamma)); | 1503 | png_fixed_point screen_gamma, png_fixed_point override_file_gamma)); |
1504 | #endif | 1504 | #endif |
1505 | 1505 | ||
1506 | #ifdef PNG_WRITE_FLUSH_SUPPORTED | 1506 | #ifdef PNG_WRITE_FLUSH_SUPPORTED |
1507 | /* Set how many lines between output flushes - 0 for no flushing */ | 1507 | /* Set how many lines between output flushes - 0 for no flushing */ |
1508 | PNG_EXPORT(51, void, png_set_flush, (png_structp png_ptr, int nrows)); | 1508 | PNG_EXPORT(51, void, png_set_flush, (png_structp png_ptr, int nrows)); |
1509 | /* Flush the current PNG output buffer */ | 1509 | /* Flush the current PNG output buffer */ |
1510 | PNG_EXPORT(52, void, png_write_flush, (png_structp png_ptr)); | 1510 | PNG_EXPORT(52, void, png_write_flush, (png_structp png_ptr)); |
1511 | #endif | 1511 | #endif |
1512 | 1512 | ||
1513 | /* Optional update palette with requested transformations */ | 1513 | /* Optional update palette with requested transformations */ |
1514 | PNG_EXPORT(53, void, png_start_read_image, (png_structp png_ptr)); | 1514 | PNG_EXPORT(53, void, png_start_read_image, (png_structp png_ptr)); |
1515 | 1515 | ||
1516 | /* Optional call to update the users info structure */ | 1516 | /* Optional call to update the users info structure */ |
1517 | PNG_EXPORT(54, void, png_read_update_info, | 1517 | PNG_EXPORT(54, void, png_read_update_info, |
1518 | (png_structp png_ptr, png_infop info_ptr)); | 1518 | (png_structp png_ptr, png_infop info_ptr)); |
1519 | 1519 | ||
1520 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED | 1520 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
1521 | /* Read one or more rows of image data. */ | 1521 | /* Read one or more rows of image data. */ |
1522 | PNG_EXPORT(55, void, png_read_rows, (png_structp png_ptr, png_bytepp row, | 1522 | PNG_EXPORT(55, void, png_read_rows, (png_structp png_ptr, png_bytepp row, |
1523 | png_bytepp display_row, png_uint_32 num_rows)); | 1523 | png_bytepp display_row, png_uint_32 num_rows)); |
1524 | #endif | 1524 | #endif |
1525 | 1525 | ||
1526 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED | 1526 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
1527 | /* Read a row of data. */ | 1527 | /* Read a row of data. */ |
1528 | PNG_EXPORT(56, void, png_read_row, (png_structp png_ptr, png_bytep row, | 1528 | PNG_EXPORT(56, void, png_read_row, (png_structp png_ptr, png_bytep row, |
1529 | png_bytep display_row)); | 1529 | png_bytep display_row)); |
1530 | #endif | 1530 | #endif |
1531 | 1531 | ||
1532 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED | 1532 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
1533 | /* Read the whole image into memory at once. */ | 1533 | /* Read the whole image into memory at once. */ |
1534 | PNG_EXPORT(57, void, png_read_image, (png_structp png_ptr, png_bytepp image)); | 1534 | PNG_EXPORT(57, void, png_read_image, (png_structp png_ptr, png_bytepp image)); |
1535 | #endif | 1535 | #endif |
1536 | 1536 | ||
1537 | /* Write a row of image data */ | 1537 | /* Write a row of image data */ |
1538 | PNG_EXPORT(58, void, png_write_row, | 1538 | PNG_EXPORT(58, void, png_write_row, |
1539 | (png_structp png_ptr, png_const_bytep row)); | 1539 | (png_structp png_ptr, png_const_bytep row)); |
1540 | 1540 | ||
1541 | /* Write a few rows of image data: (*row) is not written; however, the type | 1541 | /* Write a few rows of image data: (*row) is not written; however, the type |
1542 | * is declared as writeable to maintain compatibility with previous versions | 1542 | * is declared as writeable to maintain compatibility with previous versions |
1543 | * of libpng and to allow the 'display_row' array from read_rows to be passed | 1543 | * of libpng and to allow the 'display_row' array from read_rows to be passed |
1544 | * unchanged to write_rows. | 1544 | * unchanged to write_rows. |
1545 | */ | 1545 | */ |
1546 | PNG_EXPORT(59, void, png_write_rows, (png_structp png_ptr, png_bytepp row, | 1546 | PNG_EXPORT(59, void, png_write_rows, (png_structp png_ptr, png_bytepp row, |
1547 | png_uint_32 num_rows)); | 1547 | png_uint_32 num_rows)); |
1548 | 1548 | ||
1549 | /* Write the image data */ | 1549 | /* Write the image data */ |
1550 | PNG_EXPORT(60, void, png_write_image, | 1550 | PNG_EXPORT(60, void, png_write_image, |
1551 | (png_structp png_ptr, png_bytepp image)); | 1551 | (png_structp png_ptr, png_bytepp image)); |
1552 | 1552 | ||
1553 | /* Write the end of the PNG file. */ | 1553 | /* Write the end of the PNG file. */ |
1554 | PNG_EXPORT(61, void, png_write_end, | 1554 | PNG_EXPORT(61, void, png_write_end, |
1555 | (png_structp png_ptr, png_infop info_ptr)); | 1555 | (png_structp png_ptr, png_infop info_ptr)); |
1556 | 1556 | ||
1557 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED | 1557 | #ifdef PNG_SEQUENTIAL_READ_SUPPORTED |
1558 | /* Read the end of the PNG file. */ | 1558 | /* Read the end of the PNG file. */ |
1559 | PNG_EXPORT(62, void, png_read_end, (png_structp png_ptr, png_infop info_ptr)); | 1559 | PNG_EXPORT(62, void, png_read_end, (png_structp png_ptr, png_infop info_ptr)); |
1560 | #endif | 1560 | #endif |
1561 | 1561 | ||
1562 | /* Free any memory associated with the png_info_struct */ | 1562 | /* Free any memory associated with the png_info_struct */ |
1563 | PNG_EXPORT(63, void, png_destroy_info_struct, (png_structp png_ptr, | 1563 | PNG_EXPORT(63, void, png_destroy_info_struct, (png_structp png_ptr, |
1564 | png_infopp info_ptr_ptr)); | 1564 | png_infopp info_ptr_ptr)); |
1565 | 1565 | ||
1566 | /* Free any memory associated with the png_struct and the png_info_structs */ | 1566 | /* Free any memory associated with the png_struct and the png_info_structs */ |
1567 | PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr, | 1567 | PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr, |
1568 | png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); | 1568 | png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); |
1569 | 1569 | ||
1570 | /* Free any memory associated with the png_struct and the png_info_structs */ | 1570 | /* Free any memory associated with the png_struct and the png_info_structs */ |
1571 | PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr, | 1571 | PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr, |
1572 | png_infopp info_ptr_ptr)); | 1572 | png_infopp info_ptr_ptr)); |
1573 | 1573 | ||
1574 | /* Set the libpng method of handling chunk CRC errors */ | 1574 | /* Set the libpng method of handling chunk CRC errors */ |
1575 | PNG_EXPORT(66, void, png_set_crc_action, | 1575 | PNG_EXPORT(66, void, png_set_crc_action, |
1576 | (png_structp png_ptr, int crit_action, int ancil_action)); | 1576 | (png_structp png_ptr, int crit_action, int ancil_action)); |
1577 | 1577 | ||
1578 | /* Values for png_set_crc_action() say how to handle CRC errors in | 1578 | /* Values for png_set_crc_action() say how to handle CRC errors in |
1579 | * ancillary and critical chunks, and whether to use the data contained | 1579 | * ancillary and critical chunks, and whether to use the data contained |
1580 | * therein. Note that it is impossible to "discard" data in a critical | 1580 | * therein. Note that it is impossible to "discard" data in a critical |
1581 | * chunk. For versions prior to 0.90, the action was always error/quit, | 1581 | * chunk. For versions prior to 0.90, the action was always error/quit, |
1582 | * whereas in version 0.90 and later, the action for CRC errors in ancillary | 1582 | * whereas in version 0.90 and later, the action for CRC errors in ancillary |
1583 | * chunks is warn/discard. These values should NOT be changed. | 1583 | * chunks is warn/discard. These values should NOT be changed. |
1584 | * | 1584 | * |
1585 | * value action:critical action:ancillary | 1585 | * value action:critical action:ancillary |
1586 | */ | 1586 | */ |
1587 | #define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */ | 1587 | #define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */ |
1588 | #define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */ | 1588 | #define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */ |
1589 | #define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */ | 1589 | #define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */ |
1590 | #define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */ | 1590 | #define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */ |
1591 | #define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ | 1591 | #define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ |
1592 | #define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ | 1592 | #define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ |
1593 | 1593 | ||
1594 | /* These functions give the user control over the scan-line filtering in | 1594 | /* These functions give the user control over the scan-line filtering in |
1595 | * libpng and the compression methods used by zlib. These functions are | 1595 | * libpng and the compression methods used by zlib. These functions are |
1596 | * mainly useful for testing, as the defaults should work with most users. | 1596 | * mainly useful for testing, as the defaults should work with most users. |
1597 | * Those users who are tight on memory or want faster performance at the | 1597 | * Those users who are tight on memory or want faster performance at the |
1598 | * expense of compression can modify them. See the compression library | 1598 | * expense of compression can modify them. See the compression library |
1599 | * header file (zlib.h) for an explination of the compression functions. | 1599 | * header file (zlib.h) for an explination of the compression functions. |
1600 | */ | 1600 | */ |
1601 | 1601 | ||
1602 | /* Set the filtering method(s) used by libpng. Currently, the only valid | 1602 | /* Set the filtering method(s) used by libpng. Currently, the only valid |
1603 | * value for "method" is 0. | 1603 | * value for "method" is 0. |
1604 | */ | 1604 | */ |
1605 | PNG_EXPORT(67, void, png_set_filter, | 1605 | PNG_EXPORT(67, void, png_set_filter, |
1606 | (png_structp png_ptr, int method, int filters)); | 1606 | (png_structp png_ptr, int method, int filters)); |
1607 | 1607 | ||
1608 | /* Flags for png_set_filter() to say which filters to use. The flags | 1608 | /* Flags for png_set_filter() to say which filters to use. The flags |
1609 | * are chosen so that they don't conflict with real filter types | 1609 | * are chosen so that they don't conflict with real filter types |
1610 | * below, in case they are supplied instead of the #defined constants. | 1610 | * below, in case they are supplied instead of the #defined constants. |
1611 | * These values should NOT be changed. | 1611 | * These values should NOT be changed. |
1612 | */ | 1612 | */ |
1613 | #define PNG_NO_FILTERS 0x00 | 1613 | #define PNG_NO_FILTERS 0x00 |
1614 | #define PNG_FILTER_NONE 0x08 | 1614 | #define PNG_FILTER_NONE 0x08 |
1615 | #define PNG_FILTER_SUB 0x10 | 1615 | #define PNG_FILTER_SUB 0x10 |
1616 | #define PNG_FILTER_UP 0x20 | 1616 | #define PNG_FILTER_UP 0x20 |
1617 | #define PNG_FILTER_AVG 0x40 | 1617 | #define PNG_FILTER_AVG 0x40 |
1618 | #define PNG_FILTER_PAETH 0x80 | 1618 | #define PNG_FILTER_PAETH 0x80 |
1619 | #define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \ | 1619 | #define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \ |
1620 | PNG_FILTER_AVG | PNG_FILTER_PAETH) | 1620 | PNG_FILTER_AVG | PNG_FILTER_PAETH) |
1621 | 1621 | ||
1622 | /* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now. | 1622 | /* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now. |
1623 | * These defines should NOT be changed. | 1623 | * These defines should NOT be changed. |
1624 | */ | 1624 | */ |
1625 | #define PNG_FILTER_VALUE_NONE 0 | 1625 | #define PNG_FILTER_VALUE_NONE 0 |
1626 | #define PNG_FILTER_VALUE_SUB 1 | 1626 | #define PNG_FILTER_VALUE_SUB 1 |
1627 | #define PNG_FILTER_VALUE_UP 2 | 1627 | #define PNG_FILTER_VALUE_UP 2 |
1628 | #define PNG_FILTER_VALUE_AVG 3 | 1628 | #define PNG_FILTER_VALUE_AVG 3 |
1629 | #define PNG_FILTER_VALUE_PAETH 4 | 1629 | #define PNG_FILTER_VALUE_PAETH 4 |
1630 | #define PNG_FILTER_VALUE_LAST 5 | 1630 | #define PNG_FILTER_VALUE_LAST 5 |
1631 | 1631 | ||
1632 | #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* EXPERIMENTAL */ | 1632 | #ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED /* EXPERIMENTAL */ |
1633 | /* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_ | 1633 | /* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_ |
1634 | * defines, either the default (minimum-sum-of-absolute-differences), or | 1634 | * defines, either the default (minimum-sum-of-absolute-differences), or |
1635 | * the experimental method (weighted-minimum-sum-of-absolute-differences). | 1635 | * the experimental method (weighted-minimum-sum-of-absolute-differences). |
1636 | * | 1636 | * |
1637 | * Weights are factors >= 1.0, indicating how important it is to keep the | 1637 | * Weights are factors >= 1.0, indicating how important it is to keep the |
1638 | * filter type consistent between rows. Larger numbers mean the current | 1638 | * filter type consistent between rows. Larger numbers mean the current |
1639 | * filter is that many times as likely to be the same as the "num_weights" | 1639 | * filter is that many times as likely to be the same as the "num_weights" |
1640 | * previous filters. This is cumulative for each previous row with a weight. | 1640 | * previous filters. This is cumulative for each previous row with a weight. |
1641 | * There needs to be "num_weights" values in "filter_weights", or it can be | 1641 | * There needs to be "num_weights" values in "filter_weights", or it can be |
1642 | * NULL if the weights aren't being specified. Weights have no influence on | 1642 | * NULL if the weights aren't being specified. Weights have no influence on |
1643 | * the selection of the first row filter. Well chosen weights can (in theory) | 1643 | * the selection of the first row filter. Well chosen weights can (in theory) |
1644 | * improve the compression for a given image. | 1644 | * improve the compression for a given image. |
1645 | * | 1645 | * |
1646 | * Costs are factors >= 1.0 indicating the relative decoding costs of a | 1646 | * Costs are factors >= 1.0 indicating the relative decoding costs of a |
1647 | * filter type. Higher costs indicate more decoding expense, and are | 1647 | * filter type. Higher costs indicate more decoding expense, and are |
1648 | * therefore less likely to be selected over a filter with lower computational | 1648 | * therefore less likely to be selected over a filter with lower computational |
1649 | * costs. There needs to be a value in "filter_costs" for each valid filter | 1649 | * costs. There needs to be a value in "filter_costs" for each valid filter |
1650 | * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't | 1650 | * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't |
1651 | * setting the costs. Costs try to improve the speed of decompression without | 1651 | * setting the costs. Costs try to improve the speed of decompression without |
1652 | * unduly increasing the compressed image size. | 1652 | * unduly increasing the compressed image size. |
1653 | * | 1653 | * |
1654 | * A negative weight or cost indicates the default value is to be used, and | 1654 | * A negative weight or cost indicates the default value is to be used, and |
1655 | * values in the range [0.0, 1.0) indicate the value is to remain unchanged. | 1655 | * values in the range [0.0, 1.0) indicate the value is to remain unchanged. |
1656 | * The default values for both weights and costs are currently 1.0, but may | 1656 | * The default values for both weights and costs are currently 1.0, but may |
1657 | * change if good general weighting/cost heuristics can be found. If both | 1657 | * change if good general weighting/cost heuristics can be found. If both |
1658 | * the weights and costs are set to 1.0, this degenerates the WEIGHTED method | 1658 | * the weights and costs are set to 1.0, this degenerates the WEIGHTED method |
1659 | * to the UNWEIGHTED method, but with added encoding time/computation. | 1659 | * to the UNWEIGHTED method, but with added encoding time/computation. |
1660 | */ | 1660 | */ |
1661 | PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr, | 1661 | PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structp png_ptr, |
1662 | int heuristic_method, int num_weights, png_const_doublep filter_weights, | 1662 | int heuristic_method, int num_weights, png_const_doublep filter_weights, |
1663 | png_const_doublep filter_costs)); | 1663 | png_const_doublep filter_costs)); |
1664 | PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, | 1664 | PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed, |
1665 | (png_structp png_ptr, | 1665 | (png_structp png_ptr, |
1666 | int heuristic_method, int num_weights, png_const_fixed_point_p | 1666 | int heuristic_method, int num_weights, png_const_fixed_point_p |
1667 | filter_weights, png_const_fixed_point_p filter_costs)); | 1667 | filter_weights, png_const_fixed_point_p filter_costs)); |
1668 | #endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ | 1668 | #endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ |
1669 | 1669 | ||
1670 | /* Heuristic used for row filter selection. These defines should NOT be | 1670 | /* Heuristic used for row filter selection. These defines should NOT be |
1671 | * changed. | 1671 | * changed. |
1672 | */ | 1672 | */ |
1673 | #define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */ | 1673 | #define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */ |
1674 | #define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */ | 1674 | #define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */ |
1675 | #define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ | 1675 | #define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ |
1676 | #define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ | 1676 | #define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ |
1677 | 1677 | ||
1678 | #ifdef PNG_WRITE_SUPPORTED | 1678 | #ifdef PNG_WRITE_SUPPORTED |
1679 | /* Set the library compression level. Currently, valid values range from | 1679 | /* Set the library compression level. Currently, valid values range from |
1680 | * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 | 1680 | * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 |
1681 | * (0 - no compression, 9 - "maximal" compression). Note that tests have | 1681 | * (0 - no compression, 9 - "maximal" compression). Note that tests have |
1682 | * shown that zlib compression levels 3-6 usually perform as well as level 9 | 1682 | * shown that zlib compression levels 3-6 usually perform as well as level 9 |
1683 | * for PNG images, and do considerably fewer caclulations. In the future, | 1683 | * for PNG images, and do considerably fewer caclulations. In the future, |
1684 | * these values may not correspond directly to the zlib compression levels. | 1684 | * these values may not correspond directly to the zlib compression levels. |
1685 | */ | 1685 | */ |
1686 | PNG_EXPORT(69, void, png_set_compression_level, | 1686 | PNG_EXPORT(69, void, png_set_compression_level, |
1687 | (png_structp png_ptr, int level)); | 1687 | (png_structp png_ptr, int level)); |
1688 | 1688 | ||
1689 | PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structp png_ptr, | 1689 | PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structp png_ptr, |
1690 | int mem_level)); | 1690 | int mem_level)); |
1691 | 1691 | ||
1692 | PNG_EXPORT(71, void, png_set_compression_strategy, (png_structp png_ptr, | 1692 | PNG_EXPORT(71, void, png_set_compression_strategy, (png_structp png_ptr, |
1693 | int strategy)); | 1693 | int strategy)); |
1694 | 1694 | ||
1695 | /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a | 1695 | /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a |
1696 | * smaller value of window_bits if it can do so safely. | 1696 | * smaller value of window_bits if it can do so safely. |
1697 | */ | 1697 | */ |
1698 | PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr, | 1698 | PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structp png_ptr, |
1699 | int window_bits)); | 1699 | int window_bits)); |
1700 | 1700 | ||
1701 | PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr, | 1701 | PNG_EXPORT(73, void, png_set_compression_method, (png_structp png_ptr, |
1702 | int method)); | 1702 | int method)); |
1703 | #endif | 1703 | #endif |
1704 | 1704 | ||
1705 | #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED | 1705 | #ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED |
1706 | /* Also set zlib parameters for compressing non-IDAT chunks */ | 1706 | /* Also set zlib parameters for compressing non-IDAT chunks */ |
1707 | PNG_EXPORT(222, void, png_set_text_compression_level, | 1707 | PNG_EXPORT(222, void, png_set_text_compression_level, |
1708 | (png_structp png_ptr, int level)); | 1708 | (png_structp png_ptr, int level)); |
1709 | 1709 | ||
1710 | PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structp png_ptr, | 1710 | PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structp png_ptr, |
1711 | int mem_level)); | 1711 | int mem_level)); |
1712 | 1712 | ||
1713 | PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structp png_ptr, | 1713 | PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structp png_ptr, |
1714 | int strategy)); | 1714 | int strategy)); |
1715 | 1715 | ||
1716 | /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a | 1716 | /* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a |
1717 | * smaller value of window_bits if it can do so safely. | 1717 | * smaller value of window_bits if it can do so safely. |
1718 | */ | 1718 | */ |
1719 | PNG_EXPORT(225, void, png_set_text_compression_window_bits, (png_structp | 1719 | PNG_EXPORT(225, void, png_set_text_compression_window_bits, (png_structp |
1720 | png_ptr, int window_bits)); | 1720 | png_ptr, int window_bits)); |
1721 | 1721 | ||
1722 | PNG_EXPORT(226, void, png_set_text_compression_method, (png_structp png_ptr, | 1722 | PNG_EXPORT(226, void, png_set_text_compression_method, (png_structp png_ptr, |
1723 | int method)); | 1723 | int method)); |
1724 | #endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ | 1724 | #endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */ |
1725 | 1725 | ||
1726 | /* These next functions are called for input/output, memory, and error | 1726 | /* These next functions are called for input/output, memory, and error |
1727 | * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, | 1727 | * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, |
1728 | * and call standard C I/O routines such as fread(), fwrite(), and | 1728 | * and call standard C I/O routines such as fread(), fwrite(), and |
1729 | * fprintf(). These functions can be made to use other I/O routines | 1729 | * fprintf(). These functions can be made to use other I/O routines |
1730 | * at run time for those applications that need to handle I/O in a | 1730 | * at run time for those applications that need to handle I/O in a |
1731 | * different manner by calling png_set_???_fn(). See libpng-manual.txt for | 1731 | * different manner by calling png_set_???_fn(). See libpng-manual.txt for |
1732 | * more information. | 1732 | * more information. |
1733 | */ | 1733 | */ |
1734 | 1734 | ||
1735 | #ifdef PNG_STDIO_SUPPORTED | 1735 | #ifdef PNG_STDIO_SUPPORTED |
1736 | /* Initialize the input/output for the PNG file to the default functions. */ | 1736 | /* Initialize the input/output for the PNG file to the default functions. */ |
1737 | PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp)); | 1737 | PNG_EXPORT(74, void, png_init_io, (png_structp png_ptr, png_FILE_p fp)); |
1738 | #endif | 1738 | #endif |
1739 | 1739 | ||
1740 | /* Replace the (error and abort), and warning functions with user | 1740 | /* Replace the (error and abort), and warning functions with user |
1741 | * supplied functions. If no messages are to be printed you must still | 1741 | * supplied functions. If no messages are to be printed you must still |
1742 | * write and use replacement functions. The replacement error_fn should | 1742 | * write and use replacement functions. The replacement error_fn should |
1743 | * still do a longjmp to the last setjmp location if you are using this | 1743 | * still do a longjmp to the last setjmp location if you are using this |
1744 | * method of error handling. If error_fn or warning_fn is NULL, the | 1744 | * method of error handling. If error_fn or warning_fn is NULL, the |
1745 | * default function will be used. | 1745 | * default function will be used. |
1746 | */ | 1746 | */ |
1747 | 1747 | ||
1748 | PNG_EXPORT(75, void, png_set_error_fn, | 1748 | PNG_EXPORT(75, void, png_set_error_fn, |
1749 | (png_structp png_ptr, png_voidp error_ptr, | 1749 | (png_structp png_ptr, png_voidp error_ptr, |
1750 | png_error_ptr error_fn, png_error_ptr warning_fn)); | 1750 | png_error_ptr error_fn, png_error_ptr warning_fn)); |
1751 | 1751 | ||
1752 | /* Return the user pointer associated with the error functions */ | 1752 | /* Return the user pointer associated with the error functions */ |
1753 | PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr)); | 1753 | PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structp png_ptr)); |
1754 | 1754 | ||
1755 | /* Replace the default data output functions with a user supplied one(s). | 1755 | /* Replace the default data output functions with a user supplied one(s). |
1756 | * If buffered output is not used, then output_flush_fn can be set to NULL. | 1756 | * If buffered output is not used, then output_flush_fn can be set to NULL. |
1757 | * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time | 1757 | * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time |
1758 | * output_flush_fn will be ignored (and thus can be NULL). | 1758 | * output_flush_fn will be ignored (and thus can be NULL). |
1759 | * It is probably a mistake to use NULL for output_flush_fn if | 1759 | * It is probably a mistake to use NULL for output_flush_fn if |
1760 | * write_data_fn is not also NULL unless you have built libpng with | 1760 | * write_data_fn is not also NULL unless you have built libpng with |
1761 | * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's | 1761 | * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's |
1762 | * default flush function, which uses the standard *FILE structure, will | 1762 | * default flush function, which uses the standard *FILE structure, will |
1763 | * be used. | 1763 | * be used. |
1764 | */ | 1764 | */ |
1765 | PNG_EXPORT(77, void, png_set_write_fn, (png_structp png_ptr, png_voidp io_ptr, | 1765 | PNG_EXPORT(77, void, png_set_write_fn, (png_structp png_ptr, png_voidp io_ptr, |
1766 | png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); | 1766 | png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); |
1767 | 1767 | ||
1768 | /* Replace the default data input function with a user supplied one. */ | 1768 | /* Replace the default data input function with a user supplied one. */ |
1769 | PNG_EXPORT(78, void, png_set_read_fn, (png_structp png_ptr, png_voidp io_ptr, | 1769 | PNG_EXPORT(78, void, png_set_read_fn, (png_structp png_ptr, png_voidp io_ptr, |
1770 | png_rw_ptr read_data_fn)); | 1770 | png_rw_ptr read_data_fn)); |
1771 | 1771 | ||
1772 | /* Return the user pointer associated with the I/O functions */ | 1772 | /* Return the user pointer associated with the I/O functions */ |
1773 | PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_structp png_ptr)); | 1773 | PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_structp png_ptr)); |
1774 | 1774 | ||
1775 | PNG_EXPORT(80, void, png_set_read_status_fn, (png_structp png_ptr, | 1775 | PNG_EXPORT(80, void, png_set_read_status_fn, (png_structp png_ptr, |
1776 | png_read_status_ptr read_row_fn)); | 1776 | png_read_status_ptr read_row_fn)); |
1777 | 1777 | ||
1778 | PNG_EXPORT(81, void, png_set_write_status_fn, (png_structp png_ptr, | 1778 | PNG_EXPORT(81, void, png_set_write_status_fn, (png_structp png_ptr, |
1779 | png_write_status_ptr write_row_fn)); | 1779 | png_write_status_ptr write_row_fn)); |
1780 | 1780 | ||
1781 | #ifdef PNG_USER_MEM_SUPPORTED | 1781 | #ifdef PNG_USER_MEM_SUPPORTED |
1782 | /* Replace the default memory allocation functions with user supplied one(s). */ | 1782 | /* Replace the default memory allocation functions with user supplied one(s). */ |
1783 | PNG_EXPORT(82, void, png_set_mem_fn, (png_structp png_ptr, png_voidp mem_ptr, | 1783 | PNG_EXPORT(82, void, png_set_mem_fn, (png_structp png_ptr, png_voidp mem_ptr, |
1784 | png_malloc_ptr malloc_fn, png_free_ptr free_fn)); | 1784 | png_malloc_ptr malloc_fn, png_free_ptr free_fn)); |
1785 | /* Return the user pointer associated with the memory functions */ | 1785 | /* Return the user pointer associated with the memory functions */ |
1786 | PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structp png_ptr)); | 1786 | PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structp png_ptr)); |
1787 | #endif | 1787 | #endif |
1788 | 1788 | ||
1789 | #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED | 1789 | #ifdef PNG_READ_USER_TRANSFORM_SUPPORTED |
1790 | PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structp png_ptr, | 1790 | PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structp png_ptr, |
1791 | png_user_transform_ptr read_user_transform_fn)); | 1791 | png_user_transform_ptr read_user_transform_fn)); |
1792 | #endif | 1792 | #endif |
1793 | 1793 | ||
1794 | #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED | 1794 | #ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED |
1795 | PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structp png_ptr, | 1795 | PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structp png_ptr, |
1796 | png_user_transform_ptr write_user_transform_fn)); | 1796 | png_user_transform_ptr write_user_transform_fn)); |
1797 | #endif | 1797 | #endif |
1798 | 1798 | ||
1799 | #ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED | 1799 | #ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED |
1800 | PNG_EXPORT(86, void, png_set_user_transform_info, (png_structp png_ptr, | 1800 | PNG_EXPORT(86, void, png_set_user_transform_info, (png_structp png_ptr, |
1801 | png_voidp user_transform_ptr, int user_transform_depth, | 1801 | png_voidp user_transform_ptr, int user_transform_depth, |
1802 | int user_transform_channels)); | 1802 | int user_transform_channels)); |
1803 | /* Return the user pointer associated with the user transform functions */ | 1803 | /* Return the user pointer associated with the user transform functions */ |
1804 | PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr, | 1804 | PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr, |
1805 | (png_const_structp png_ptr)); | 1805 | (png_const_structp png_ptr)); |
1806 | #endif | 1806 | #endif |
1807 | 1807 | ||
1808 | #ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED | 1808 | #ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED |
1809 | /* Return information about the row currently being processed. Note that these | 1809 | /* Return information about the row currently being processed. Note that these |
1810 | * APIs do not fail but will return unexpected results if called outside a user | 1810 | * APIs do not fail but will return unexpected results if called outside a user |
1811 | * transform callback. Also note that when transforming an interlaced image the | 1811 | * transform callback. Also note that when transforming an interlaced image the |
1812 | * row number is the row number within the sub-image of the interlace pass, so | 1812 | * row number is the row number within the sub-image of the interlace pass, so |
1813 | * the value will increase to the height of the sub-image (not the full image) | 1813 | * the value will increase to the height of the sub-image (not the full image) |
1814 | * then reset to 0 for the next pass. | 1814 | * then reset to 0 for the next pass. |
1815 | * | 1815 | * |
1816 | * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to | 1816 | * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to |
1817 | * find the output pixel (x,y) given an interlaced sub-image pixel | 1817 | * find the output pixel (x,y) given an interlaced sub-image pixel |
1818 | * (row,col,pass). (See below for these macros.) | 1818 | * (row,col,pass). (See below for these macros.) |
1819 | */ | 1819 | */ |
1820 | PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structp)); | 1820 | PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structp)); |
1821 | PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structp)); | 1821 | PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structp)); |
1822 | #endif | 1822 | #endif |
1823 | 1823 | ||
1824 | #ifdef PNG_USER_CHUNKS_SUPPORTED | 1824 | #ifdef PNG_USER_CHUNKS_SUPPORTED |
1825 | PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structp png_ptr, | 1825 | PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structp png_ptr, |
1826 | png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); | 1826 | png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); |
1827 | PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structp png_ptr)); | 1827 | PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structp png_ptr)); |
1828 | #endif | 1828 | #endif |
1829 | 1829 | ||
1830 | #ifdef PNG_PROGRESSIVE_READ_SUPPORTED | 1830 | #ifdef PNG_PROGRESSIVE_READ_SUPPORTED |
1831 | /* Sets the function callbacks for the push reader, and a pointer to a | 1831 | /* Sets the function callbacks for the push reader, and a pointer to a |
1832 | * user-defined structure available to the callback functions. | 1832 | * user-defined structure available to the callback functions. |
1833 | */ | 1833 | */ |
1834 | PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr, | 1834 | PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structp png_ptr, |
1835 | png_voidp progressive_ptr, png_progressive_info_ptr info_fn, | 1835 | png_voidp progressive_ptr, png_progressive_info_ptr info_fn, |
1836 | png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn)); | 1836 | png_progressive_row_ptr row_fn, png_progressive_end_ptr end_fn)); |
1837 | 1837 | ||
1838 | /* Returns the user pointer associated with the push read functions */ | 1838 | /* Returns the user pointer associated with the push read functions */ |
1839 | PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structp png_ptr)); | 1839 | PNG_EXPORT(91, png_voidp, png_get_progressive_ptr, (png_const_structp png_ptr)); |
1840 | 1840 | ||
1841 | /* Function to be called when data becomes available */ | 1841 | /* Function to be called when data becomes available */ |
1842 | PNG_EXPORT(92, void, png_process_data, | 1842 | PNG_EXPORT(92, void, png_process_data, |
1843 | (png_structp png_ptr, png_infop info_ptr, | 1843 | (png_structp png_ptr, png_infop info_ptr, |
1844 | png_bytep buffer, png_size_t buffer_size)); | 1844 | png_bytep buffer, png_size_t buffer_size)); |
1845 | 1845 | ||
1846 | /* A function which may be called *only* within png_process_data to stop the | 1846 | /* A function which may be called *only* within png_process_data to stop the |
1847 | * processing of any more data. The function returns the number of bytes | 1847 | * processing of any more data. The function returns the number of bytes |
1848 | * remaining, excluding any that libpng has cached internally. A subsequent | 1848 | * remaining, excluding any that libpng has cached internally. A subsequent |
1849 | * call to png_process_data must supply these bytes again. If the argument | 1849 | * call to png_process_data must supply these bytes again. If the argument |
1850 | * 'save' is set to true the routine will first save all the pending data and | 1850 | * 'save' is set to true the routine will first save all the pending data and |
1851 | * will always return 0. | 1851 | * will always return 0. |
1852 | */ | 1852 | */ |
1853 | PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save)); | 1853 | PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structp, int save)); |
1854 | 1854 | ||
1855 | /* A function which may be called *only* outside (after) a call to | 1855 | /* A function which may be called *only* outside (after) a call to |
1856 | * png_process_data. It returns the number of bytes of data to skip in the | 1856 | * png_process_data. It returns the number of bytes of data to skip in the |
1857 | * input. Normally it will return 0, but if it returns a non-zero value the | 1857 | * input. Normally it will return 0, but if it returns a non-zero value the |
1858 | * application must skip than number of bytes of input data and pass the | 1858 | * application must skip than number of bytes of input data and pass the |
1859 | * following data to the next call to png_process_data. | 1859 | * following data to the next call to png_process_data. |
1860 | */ | 1860 | */ |
1861 | PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp)); | 1861 | PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structp)); |
1862 | 1862 | ||
1863 | #ifdef PNG_READ_INTERLACING_SUPPORTED | 1863 | #ifdef PNG_READ_INTERLACING_SUPPORTED |
1864 | /* Function that combines rows. 'new_row' is a flag that should come from | 1864 | /* Function that combines rows. 'new_row' is a flag that should come from |
1865 | * the callback and be non-NULL if anything needs to be done; the library | 1865 | * the callback and be non-NULL if anything needs to be done; the library |
1866 | * stores its own version of the new data internally and ignores the passed | 1866 | * stores its own version of the new data internally and ignores the passed |
1867 | * in value. | 1867 | * in value. |
1868 | */ | 1868 | */ |
1869 | PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr, | 1869 | PNG_EXPORT(93, void, png_progressive_combine_row, (png_structp png_ptr, |
1870 | png_bytep old_row, png_const_bytep new_row)); | 1870 | png_bytep old_row, png_const_bytep new_row)); |
1871 | #endif /* PNG_READ_INTERLACING_SUPPORTED */ | 1871 | #endif /* PNG_READ_INTERLACING_SUPPORTED */ |
1872 | #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ | 1872 | #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ |
1873 | 1873 | ||
1874 | PNG_EXPORTA(94, png_voidp, png_malloc, | 1874 | PNG_EXPORTA(94, png_voidp, png_malloc, |
1875 | (png_structp png_ptr, png_alloc_size_t size), | 1875 | (png_structp png_ptr, png_alloc_size_t size), |
1876 | PNG_ALLOCATED); | 1876 | PNG_ALLOCATED); |
1877 | /* Added at libpng version 1.4.0 */ | 1877 | /* Added at libpng version 1.4.0 */ |
1878 | PNG_EXPORTA(95, png_voidp, png_calloc, | 1878 | PNG_EXPORTA(95, png_voidp, png_calloc, |
1879 | (png_structp png_ptr, png_alloc_size_t size), | 1879 | (png_structp png_ptr, png_alloc_size_t size), |
1880 | PNG_ALLOCATED); | 1880 | PNG_ALLOCATED); |
1881 | 1881 | ||
1882 | /* Added at libpng version 1.2.4 */ | 1882 | /* Added at libpng version 1.2.4 */ |
1883 | PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_structp png_ptr, | 1883 | PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_structp png_ptr, |
1884 | png_alloc_size_t size), PNG_ALLOCATED); | 1884 | png_alloc_size_t size), PNG_ALLOCATED); |
1885 | 1885 | ||
1886 | /* Frees a pointer allocated by png_malloc() */ | 1886 | /* Frees a pointer allocated by png_malloc() */ |
1887 | PNG_EXPORT(97, void, png_free, (png_structp png_ptr, png_voidp ptr)); | 1887 | PNG_EXPORT(97, void, png_free, (png_structp png_ptr, png_voidp ptr)); |
1888 | 1888 | ||
1889 | /* Free data that was allocated internally */ | 1889 | /* Free data that was allocated internally */ |
1890 | PNG_EXPORT(98, void, png_free_data, | 1890 | PNG_EXPORT(98, void, png_free_data, |
1891 | (png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num)); | 1891 | (png_structp png_ptr, png_infop info_ptr, png_uint_32 free_me, int num)); |
1892 | 1892 | ||
1893 | /* Reassign responsibility for freeing existing data, whether allocated | 1893 | /* Reassign responsibility for freeing existing data, whether allocated |
1894 | * by libpng or by the application */ | 1894 | * by libpng or by the application */ |
1895 | PNG_EXPORT(99, void, png_data_freer, | 1895 | PNG_EXPORT(99, void, png_data_freer, |
1896 | (png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask)); | 1896 | (png_structp png_ptr, png_infop info_ptr, int freer, png_uint_32 mask)); |
1897 | 1897 | ||
1898 | /* Assignments for png_data_freer */ | 1898 | /* Assignments for png_data_freer */ |
1899 | #define PNG_DESTROY_WILL_FREE_DATA 1 | 1899 | #define PNG_DESTROY_WILL_FREE_DATA 1 |
1900 | #define PNG_SET_WILL_FREE_DATA 1 | 1900 | #define PNG_SET_WILL_FREE_DATA 1 |
1901 | #define PNG_USER_WILL_FREE_DATA 2 | 1901 | #define PNG_USER_WILL_FREE_DATA 2 |
1902 | /* Flags for png_ptr->free_me and info_ptr->free_me */ | 1902 | /* Flags for png_ptr->free_me and info_ptr->free_me */ |
1903 | #define PNG_FREE_HIST 0x0008 | 1903 | #define PNG_FREE_HIST 0x0008 |
1904 | #define PNG_FREE_ICCP 0x0010 | 1904 | #define PNG_FREE_ICCP 0x0010 |
1905 | #define PNG_FREE_SPLT 0x0020 | 1905 | #define PNG_FREE_SPLT 0x0020 |
1906 | #define PNG_FREE_ROWS 0x0040 | 1906 | #define PNG_FREE_ROWS 0x0040 |
1907 | #define PNG_FREE_PCAL 0x0080 | 1907 | #define PNG_FREE_PCAL 0x0080 |
1908 | #define PNG_FREE_SCAL 0x0100 | 1908 | #define PNG_FREE_SCAL 0x0100 |
1909 | #define PNG_FREE_UNKN 0x0200 | 1909 | #define PNG_FREE_UNKN 0x0200 |
1910 | #define PNG_FREE_LIST 0x0400 | 1910 | #define PNG_FREE_LIST 0x0400 |
1911 | #define PNG_FREE_PLTE 0x1000 | 1911 | #define PNG_FREE_PLTE 0x1000 |
1912 | #define PNG_FREE_TRNS 0x2000 | 1912 | #define PNG_FREE_TRNS 0x2000 |
1913 | #define PNG_FREE_TEXT 0x4000 | 1913 | #define PNG_FREE_TEXT 0x4000 |
1914 | #define PNG_FREE_ALL 0x7fff | 1914 | #define PNG_FREE_ALL 0x7fff |
1915 | #define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ | 1915 | #define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ |
1916 | 1916 | ||
1917 | #ifdef PNG_USER_MEM_SUPPORTED | 1917 | #ifdef PNG_USER_MEM_SUPPORTED |
1918 | PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_structp png_ptr, | 1918 | PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_structp png_ptr, |
1919 | png_alloc_size_t size), PNG_ALLOCATED); | 1919 | png_alloc_size_t size), PNG_ALLOCATED); |
1920 | PNG_EXPORT(101, void, png_free_default, (png_structp png_ptr, png_voidp ptr)); | 1920 | PNG_EXPORT(101, void, png_free_default, (png_structp png_ptr, png_voidp ptr)); |
1921 | #endif | 1921 | #endif |
1922 | 1922 | ||
1923 | #ifdef PNG_ERROR_TEXT_SUPPORTED | 1923 | #ifdef PNG_ERROR_TEXT_SUPPORTED |
1924 | /* Fatal error in PNG image of libpng - can't continue */ | 1924 | /* Fatal error in PNG image of libpng - can't continue */ |
1925 | PNG_EXPORTA(102, void, png_error, | 1925 | PNG_EXPORTA(102, void, png_error, |
1926 | (png_structp png_ptr, png_const_charp error_message), | 1926 | (png_structp png_ptr, png_const_charp error_message), |
1927 | PNG_NORETURN); | 1927 | PNG_NORETURN); |
1928 | 1928 | ||
1929 | /* The same, but the chunk name is prepended to the error string. */ | 1929 | /* The same, but the chunk name is prepended to the error string. */ |
1930 | PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr, | 1930 | PNG_EXPORTA(103, void, png_chunk_error, (png_structp png_ptr, |
1931 | png_const_charp error_message), PNG_NORETURN); | 1931 | png_const_charp error_message), PNG_NORETURN); |
1932 | 1932 | ||
1933 | #else | 1933 | #else |
1934 | /* Fatal error in PNG image of libpng - can't continue */ | 1934 | /* Fatal error in PNG image of libpng - can't continue */ |
1935 | PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN); | 1935 | PNG_EXPORTA(104, void, png_err, (png_structp png_ptr), PNG_NORETURN); |
1936 | #endif | 1936 | #endif |
1937 | 1937 | ||
1938 | #ifdef PNG_WARNINGS_SUPPORTED | 1938 | #ifdef PNG_WARNINGS_SUPPORTED |
1939 | /* Non-fatal error in libpng. Can continue, but may have a problem. */ | 1939 | /* Non-fatal error in libpng. Can continue, but may have a problem. */ |
1940 | PNG_EXPORT(105, void, png_warning, (png_structp png_ptr, | 1940 | PNG_EXPORT(105, void, png_warning, (png_structp png_ptr, |
1941 | png_const_charp warning_message)); | 1941 | png_const_charp warning_message)); |
1942 | 1942 | ||
1943 | /* Non-fatal error in libpng, chunk name is prepended to message. */ | 1943 | /* Non-fatal error in libpng, chunk name is prepended to message. */ |
1944 | PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr, | 1944 | PNG_EXPORT(106, void, png_chunk_warning, (png_structp png_ptr, |
1945 | png_const_charp warning_message)); | 1945 | png_const_charp warning_message)); |
1946 | #endif | 1946 | #endif |
1947 | 1947 | ||
1948 | #ifdef PNG_BENIGN_ERRORS_SUPPORTED | 1948 | #ifdef PNG_BENIGN_ERRORS_SUPPORTED |
1949 | /* Benign error in libpng. Can continue, but may have a problem. | 1949 | /* Benign error in libpng. Can continue, but may have a problem. |
1950 | * User can choose whether to handle as a fatal error or as a warning. */ | 1950 | * User can choose whether to handle as a fatal error or as a warning. */ |
1951 | # undef png_benign_error | 1951 | # undef png_benign_error |
1952 | PNG_EXPORT(107, void, png_benign_error, (png_structp png_ptr, | 1952 | PNG_EXPORT(107, void, png_benign_error, (png_structp png_ptr, |
1953 | png_const_charp warning_message)); | 1953 | png_const_charp warning_message)); |
1954 | 1954 | ||
1955 | /* Same, chunk name is prepended to message. */ | 1955 | /* Same, chunk name is prepended to message. */ |
1956 | # undef png_chunk_benign_error | 1956 | # undef png_chunk_benign_error |
1957 | PNG_EXPORT(108, void, png_chunk_benign_error, (png_structp png_ptr, | 1957 | PNG_EXPORT(108, void, png_chunk_benign_error, (png_structp png_ptr, |
1958 | png_const_charp warning_message)); | 1958 | png_const_charp warning_message)); |
1959 | 1959 | ||
1960 | PNG_EXPORT(109, void, png_set_benign_errors, | 1960 | PNG_EXPORT(109, void, png_set_benign_errors, |
1961 | (png_structp png_ptr, int allowed)); | 1961 | (png_structp png_ptr, int allowed)); |
1962 | #else | 1962 | #else |
1963 | # ifdef PNG_ALLOW_BENIGN_ERRORS | 1963 | # ifdef PNG_ALLOW_BENIGN_ERRORS |
1964 | # define png_benign_error png_warning | 1964 | # define png_benign_error png_warning |
1965 | # define png_chunk_benign_error png_chunk_warning | 1965 | # define png_chunk_benign_error png_chunk_warning |
1966 | # else | 1966 | # else |
1967 | # define png_benign_error png_error | 1967 | # define png_benign_error png_error |
1968 | # define png_chunk_benign_error png_chunk_error | 1968 | # define png_chunk_benign_error png_chunk_error |
1969 | # endif | 1969 | # endif |
1970 | #endif | 1970 | #endif |
1971 | 1971 | ||
1972 | /* The png_set_<chunk> functions are for storing values in the png_info_struct. | 1972 | /* The png_set_<chunk> functions are for storing values in the png_info_struct. |
1973 | * Similarly, the png_get_<chunk> calls are used to read values from the | 1973 | * Similarly, the png_get_<chunk> calls are used to read values from the |
1974 | * png_info_struct, either storing the parameters in the passed variables, or | 1974 | * png_info_struct, either storing the parameters in the passed variables, or |
1975 | * setting pointers into the png_info_struct where the data is stored. The | 1975 | * setting pointers into the png_info_struct where the data is stored. The |
1976 | * png_get_<chunk> functions return a non-zero value if the data was available | 1976 | * png_get_<chunk> functions return a non-zero value if the data was available |
1977 | * in info_ptr, or return zero and do not change any of the parameters if the | 1977 | * in info_ptr, or return zero and do not change any of the parameters if the |
1978 | * data was not available. | 1978 | * data was not available. |
1979 | * | 1979 | * |
1980 | * These functions should be used instead of directly accessing png_info | 1980 | * These functions should be used instead of directly accessing png_info |
1981 | * to avoid problems with future changes in the size and internal layout of | 1981 | * to avoid problems with future changes in the size and internal layout of |
1982 | * png_info_struct. | 1982 | * png_info_struct. |
1983 | */ | 1983 | */ |
1984 | /* Returns "flag" if chunk data is valid in info_ptr. */ | 1984 | /* Returns "flag" if chunk data is valid in info_ptr. */ |
1985 | PNG_EXPORT(110, png_uint_32, png_get_valid, | 1985 | PNG_EXPORT(110, png_uint_32, png_get_valid, |
1986 | (png_const_structp png_ptr, png_const_infop info_ptr, | 1986 | (png_const_structp png_ptr, png_const_infop info_ptr, |
1987 | png_uint_32 flag)); | 1987 | png_uint_32 flag)); |
1988 | 1988 | ||
1989 | /* Returns number of bytes needed to hold a transformed row. */ | 1989 | /* Returns number of bytes needed to hold a transformed row. */ |
1990 | PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structp png_ptr, | 1990 | PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structp png_ptr, |
1991 | png_const_infop info_ptr)); | 1991 | png_const_infop info_ptr)); |
1992 | 1992 | ||
1993 | #ifdef PNG_INFO_IMAGE_SUPPORTED | 1993 | #ifdef PNG_INFO_IMAGE_SUPPORTED |
1994 | /* Returns row_pointers, which is an array of pointers to scanlines that was | 1994 | /* Returns row_pointers, which is an array of pointers to scanlines that was |
1995 | * returned from png_read_png(). | 1995 | * returned from png_read_png(). |
1996 | */ | 1996 | */ |
1997 | PNG_EXPORT(112, png_bytepp, png_get_rows, | 1997 | PNG_EXPORT(112, png_bytepp, png_get_rows, |
1998 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 1998 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
1999 | /* Set row_pointers, which is an array of pointers to scanlines for use | 1999 | /* Set row_pointers, which is an array of pointers to scanlines for use |
2000 | * by png_write_png(). | 2000 | * by png_write_png(). |
2001 | */ | 2001 | */ |
2002 | PNG_EXPORT(113, void, png_set_rows, (png_structp png_ptr, | 2002 | PNG_EXPORT(113, void, png_set_rows, (png_structp png_ptr, |
2003 | png_infop info_ptr, png_bytepp row_pointers)); | 2003 | png_infop info_ptr, png_bytepp row_pointers)); |
2004 | #endif | 2004 | #endif |
2005 | 2005 | ||
2006 | /* Returns number of color channels in image. */ | 2006 | /* Returns number of color channels in image. */ |
2007 | PNG_EXPORT(114, png_byte, png_get_channels, | 2007 | PNG_EXPORT(114, png_byte, png_get_channels, |
2008 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2008 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2009 | 2009 | ||
2010 | #ifdef PNG_EASY_ACCESS_SUPPORTED | 2010 | #ifdef PNG_EASY_ACCESS_SUPPORTED |
2011 | /* Returns image width in pixels. */ | 2011 | /* Returns image width in pixels. */ |
2012 | PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structp png_ptr, | 2012 | PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structp png_ptr, |
2013 | png_const_infop info_ptr)); | 2013 | png_const_infop info_ptr)); |
2014 | 2014 | ||
2015 | /* Returns image height in pixels. */ | 2015 | /* Returns image height in pixels. */ |
2016 | PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structp png_ptr, | 2016 | PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structp png_ptr, |
2017 | png_const_infop info_ptr)); | 2017 | png_const_infop info_ptr)); |
2018 | 2018 | ||
2019 | /* Returns image bit_depth. */ | 2019 | /* Returns image bit_depth. */ |
2020 | PNG_EXPORT(117, png_byte, png_get_bit_depth, | 2020 | PNG_EXPORT(117, png_byte, png_get_bit_depth, |
2021 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2021 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2022 | 2022 | ||
2023 | /* Returns image color_type. */ | 2023 | /* Returns image color_type. */ |
2024 | PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structp png_ptr, | 2024 | PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structp png_ptr, |
2025 | png_const_infop info_ptr)); | 2025 | png_const_infop info_ptr)); |
2026 | 2026 | ||
2027 | /* Returns image filter_type. */ | 2027 | /* Returns image filter_type. */ |
2028 | PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structp png_ptr, | 2028 | PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structp png_ptr, |
2029 | png_const_infop info_ptr)); | 2029 | png_const_infop info_ptr)); |
2030 | 2030 | ||
2031 | /* Returns image interlace_type. */ | 2031 | /* Returns image interlace_type. */ |
2032 | PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structp png_ptr, | 2032 | PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structp png_ptr, |
2033 | png_const_infop info_ptr)); | 2033 | png_const_infop info_ptr)); |
2034 | 2034 | ||
2035 | /* Returns image compression_type. */ | 2035 | /* Returns image compression_type. */ |
2036 | PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structp png_ptr, | 2036 | PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structp png_ptr, |
2037 | png_const_infop info_ptr)); | 2037 | png_const_infop info_ptr)); |
2038 | 2038 | ||
2039 | /* Returns image resolution in pixels per meter, from pHYs chunk data. */ | 2039 | /* Returns image resolution in pixels per meter, from pHYs chunk data. */ |
2040 | PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter, | 2040 | PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter, |
2041 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2041 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2042 | PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter, | 2042 | PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter, |
2043 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2043 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2044 | PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter, | 2044 | PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter, |
2045 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2045 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2046 | 2046 | ||
2047 | /* Returns pixel aspect ratio, computed from pHYs chunk data. */ | 2047 | /* Returns pixel aspect ratio, computed from pHYs chunk data. */ |
2048 | PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio, | 2048 | PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio, |
2049 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2049 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2050 | PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed, | 2050 | PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed, |
2051 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2051 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2052 | 2052 | ||
2053 | /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ | 2053 | /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ |
2054 | PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels, | 2054 | PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels, |
2055 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2055 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2056 | PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels, | 2056 | PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels, |
2057 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2057 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2058 | PNG_EXPORT(128, png_int_32, png_get_x_offset_microns, | 2058 | PNG_EXPORT(128, png_int_32, png_get_x_offset_microns, |
2059 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2059 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2060 | PNG_EXPORT(129, png_int_32, png_get_y_offset_microns, | 2060 | PNG_EXPORT(129, png_int_32, png_get_y_offset_microns, |
2061 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2061 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2062 | 2062 | ||
2063 | #endif /* PNG_EASY_ACCESS_SUPPORTED */ | 2063 | #endif /* PNG_EASY_ACCESS_SUPPORTED */ |
2064 | 2064 | ||
2065 | /* Returns pointer to signature string read from PNG header */ | 2065 | /* Returns pointer to signature string read from PNG header */ |
2066 | PNG_EXPORT(130, png_const_bytep, png_get_signature, | 2066 | PNG_EXPORT(130, png_const_bytep, png_get_signature, |
2067 | (png_const_structp png_ptr, png_infop info_ptr)); | 2067 | (png_const_structp png_ptr, png_infop info_ptr)); |
2068 | 2068 | ||
2069 | #ifdef PNG_bKGD_SUPPORTED | 2069 | #ifdef PNG_bKGD_SUPPORTED |
2070 | PNG_EXPORT(131, png_uint_32, png_get_bKGD, | 2070 | PNG_EXPORT(131, png_uint_32, png_get_bKGD, |
2071 | (png_const_structp png_ptr, png_infop info_ptr, | 2071 | (png_const_structp png_ptr, png_infop info_ptr, |
2072 | png_color_16p *background)); | 2072 | png_color_16p *background)); |
2073 | #endif | 2073 | #endif |
2074 | 2074 | ||
2075 | #ifdef PNG_bKGD_SUPPORTED | 2075 | #ifdef PNG_bKGD_SUPPORTED |
2076 | PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr, | 2076 | PNG_EXPORT(132, void, png_set_bKGD, (png_structp png_ptr, png_infop info_ptr, |
2077 | png_const_color_16p background)); | 2077 | png_const_color_16p background)); |
2078 | #endif | 2078 | #endif |
2079 | 2079 | ||
2080 | #ifdef PNG_cHRM_SUPPORTED | 2080 | #ifdef PNG_cHRM_SUPPORTED |
2081 | PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr, | 2081 | PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structp png_ptr, |
2082 | png_const_infop info_ptr, double *white_x, double *white_y, double *red_x, | 2082 | png_const_infop info_ptr, double *white_x, double *white_y, double *red_x, |
2083 | double *red_y, double *green_x, double *green_y, double *blue_x, | 2083 | double *red_y, double *green_x, double *green_y, double *blue_x, |
2084 | double *blue_y)); | 2084 | double *blue_y)); |
2085 | PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_structp png_ptr, | 2085 | PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_structp png_ptr, |
2086 | png_const_infop info_ptr, double *red_X, double *red_Y, double *red_Z, | 2086 | png_const_infop info_ptr, double *red_X, double *red_Y, double *red_Z, |
2087 | double *green_X, double *green_Y, double *green_Z, double *blue_X, | 2087 | double *green_X, double *green_Y, double *green_Z, double *blue_X, |
2088 | double *blue_Y, double *blue_Z)); | 2088 | double *blue_Y, double *blue_Z)); |
2089 | #ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */ | 2089 | #ifdef PNG_FIXED_POINT_SUPPORTED /* Otherwise not implemented */ |
2090 | PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed, | 2090 | PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed, |
2091 | (png_const_structp png_ptr, | 2091 | (png_const_structp png_ptr, |
2092 | png_const_infop info_ptr, png_fixed_point *int_white_x, | 2092 | png_const_infop info_ptr, png_fixed_point *int_white_x, |
2093 | png_fixed_point *int_white_y, png_fixed_point *int_red_x, | 2093 | png_fixed_point *int_white_y, png_fixed_point *int_red_x, |
2094 | png_fixed_point *int_red_y, png_fixed_point *int_green_x, | 2094 | png_fixed_point *int_red_y, png_fixed_point *int_green_x, |
2095 | png_fixed_point *int_green_y, png_fixed_point *int_blue_x, | 2095 | png_fixed_point *int_green_y, png_fixed_point *int_blue_x, |
2096 | png_fixed_point *int_blue_y)); | 2096 | png_fixed_point *int_blue_y)); |
2097 | #endif | 2097 | #endif |
2098 | PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed, | 2098 | PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed, |
2099 | (png_structp png_ptr, png_const_infop info_ptr, | 2099 | (png_structp png_ptr, png_const_infop info_ptr, |
2100 | png_fixed_point *int_red_X, png_fixed_point *int_red_Y, | 2100 | png_fixed_point *int_red_X, png_fixed_point *int_red_Y, |
2101 | png_fixed_point *int_red_Z, png_fixed_point *int_green_X, | 2101 | png_fixed_point *int_red_Z, png_fixed_point *int_green_X, |
2102 | png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, | 2102 | png_fixed_point *int_green_Y, png_fixed_point *int_green_Z, |
2103 | png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, | 2103 | png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y, |
2104 | png_fixed_point *int_blue_Z)); | 2104 | png_fixed_point *int_blue_Z)); |
2105 | #endif | 2105 | #endif |
2106 | 2106 | ||
2107 | #ifdef PNG_cHRM_SUPPORTED | 2107 | #ifdef PNG_cHRM_SUPPORTED |
2108 | PNG_FP_EXPORT(135, void, png_set_cHRM, | 2108 | PNG_FP_EXPORT(135, void, png_set_cHRM, |
2109 | (png_structp png_ptr, png_infop info_ptr, | 2109 | (png_structp png_ptr, png_infop info_ptr, |
2110 | double white_x, double white_y, double red_x, double red_y, double green_x, | 2110 | double white_x, double white_y, double red_x, double red_y, double green_x, |
2111 | double green_y, double blue_x, double blue_y)); | 2111 | double green_y, double blue_x, double blue_y)); |
2112 | PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_structp png_ptr, | 2112 | PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_structp png_ptr, |
2113 | png_infop info_ptr, double red_X, double red_Y, double red_Z, | 2113 | png_infop info_ptr, double red_X, double red_Y, double red_Z, |
2114 | double green_X, double green_Y, double green_Z, double blue_X, | 2114 | double green_X, double green_Y, double green_Z, double blue_X, |
2115 | double blue_Y, double blue_Z)); | 2115 | double blue_Y, double blue_Z)); |
2116 | PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr, | 2116 | PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_structp png_ptr, |
2117 | png_infop info_ptr, png_fixed_point int_white_x, | 2117 | png_infop info_ptr, png_fixed_point int_white_x, |
2118 | png_fixed_point int_white_y, png_fixed_point int_red_x, | 2118 | png_fixed_point int_white_y, png_fixed_point int_red_x, |
2119 | png_fixed_point int_red_y, png_fixed_point int_green_x, | 2119 | png_fixed_point int_red_y, png_fixed_point int_green_x, |
2120 | png_fixed_point int_green_y, png_fixed_point int_blue_x, | 2120 | png_fixed_point int_green_y, png_fixed_point int_blue_x, |
2121 | png_fixed_point int_blue_y)); | 2121 | png_fixed_point int_blue_y)); |
2122 | PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_structp png_ptr, | 2122 | PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_structp png_ptr, |
2123 | png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, | 2123 | png_infop info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y, |
2124 | png_fixed_point int_red_Z, png_fixed_point int_green_X, | 2124 | png_fixed_point int_red_Z, png_fixed_point int_green_X, |
2125 | png_fixed_point int_green_Y, png_fixed_point int_green_Z, | 2125 | png_fixed_point int_green_Y, png_fixed_point int_green_Z, |
2126 | png_fixed_point int_blue_X, png_fixed_point int_blue_Y, | 2126 | png_fixed_point int_blue_X, png_fixed_point int_blue_Y, |
2127 | png_fixed_point int_blue_Z)); | 2127 | png_fixed_point int_blue_Z)); |
2128 | #endif | 2128 | #endif |
2129 | 2129 | ||
2130 | #ifdef PNG_gAMA_SUPPORTED | 2130 | #ifdef PNG_gAMA_SUPPORTED |
2131 | PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, | 2131 | PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, |
2132 | (png_const_structp png_ptr, png_const_infop info_ptr, | 2132 | (png_const_structp png_ptr, png_const_infop info_ptr, |
2133 | double *file_gamma)); | 2133 | double *file_gamma)); |
2134 | PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed, | 2134 | PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed, |
2135 | (png_const_structp png_ptr, png_const_infop info_ptr, | 2135 | (png_const_structp png_ptr, png_const_infop info_ptr, |
2136 | png_fixed_point *int_file_gamma)); | 2136 | png_fixed_point *int_file_gamma)); |
2137 | #endif | 2137 | #endif |
2138 | 2138 | ||
2139 | #ifdef PNG_gAMA_SUPPORTED | 2139 | #ifdef PNG_gAMA_SUPPORTED |
2140 | PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr, | 2140 | PNG_FP_EXPORT(139, void, png_set_gAMA, (png_structp png_ptr, |
2141 | png_infop info_ptr, double file_gamma)); | 2141 | png_infop info_ptr, double file_gamma)); |
2142 | PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr, | 2142 | PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_structp png_ptr, |
2143 | png_infop info_ptr, png_fixed_point int_file_gamma)); | 2143 | png_infop info_ptr, png_fixed_point int_file_gamma)); |
2144 | #endif | 2144 | #endif |
2145 | 2145 | ||
2146 | #ifdef PNG_hIST_SUPPORTED | 2146 | #ifdef PNG_hIST_SUPPORTED |
2147 | PNG_EXPORT(141, png_uint_32, png_get_hIST, | 2147 | PNG_EXPORT(141, png_uint_32, png_get_hIST, |
2148 | (png_const_structp png_ptr, png_const_infop info_ptr, | 2148 | (png_const_structp png_ptr, png_const_infop info_ptr, |
2149 | png_uint_16p *hist)); | 2149 | png_uint_16p *hist)); |
2150 | #endif | 2150 | #endif |
2151 | 2151 | ||
2152 | #ifdef PNG_hIST_SUPPORTED | 2152 | #ifdef PNG_hIST_SUPPORTED |
2153 | PNG_EXPORT(142, void, png_set_hIST, (png_structp png_ptr, | 2153 | PNG_EXPORT(142, void, png_set_hIST, (png_structp png_ptr, |
2154 | png_infop info_ptr, png_const_uint_16p hist)); | 2154 | png_infop info_ptr, png_const_uint_16p hist)); |
2155 | #endif | 2155 | #endif |
2156 | 2156 | ||
2157 | PNG_EXPORT(143, png_uint_32, png_get_IHDR, | 2157 | PNG_EXPORT(143, png_uint_32, png_get_IHDR, |
2158 | (png_structp png_ptr, png_infop info_ptr, | 2158 | (png_structp png_ptr, png_infop info_ptr, |
2159 | png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, | 2159 | png_uint_32 *width, png_uint_32 *height, int *bit_depth, int *color_type, |
2160 | int *interlace_method, int *compression_method, int *filter_method)); | 2160 | int *interlace_method, int *compression_method, int *filter_method)); |
2161 | 2161 | ||
2162 | PNG_EXPORT(144, void, png_set_IHDR, | 2162 | PNG_EXPORT(144, void, png_set_IHDR, |
2163 | (png_structp png_ptr, png_infop info_ptr, | 2163 | (png_structp png_ptr, png_infop info_ptr, |
2164 | png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, | 2164 | png_uint_32 width, png_uint_32 height, int bit_depth, int color_type, |
2165 | int interlace_method, int compression_method, int filter_method)); | 2165 | int interlace_method, int compression_method, int filter_method)); |
2166 | 2166 | ||
2167 | #ifdef PNG_oFFs_SUPPORTED | 2167 | #ifdef PNG_oFFs_SUPPORTED |
2168 | PNG_EXPORT(145, png_uint_32, png_get_oFFs, | 2168 | PNG_EXPORT(145, png_uint_32, png_get_oFFs, |
2169 | (png_const_structp png_ptr, png_const_infop info_ptr, | 2169 | (png_const_structp png_ptr, png_const_infop info_ptr, |
2170 | png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)); | 2170 | png_int_32 *offset_x, png_int_32 *offset_y, int *unit_type)); |
2171 | #endif | 2171 | #endif |
2172 | 2172 | ||
2173 | #ifdef PNG_oFFs_SUPPORTED | 2173 | #ifdef PNG_oFFs_SUPPORTED |
2174 | PNG_EXPORT(146, void, png_set_oFFs, | 2174 | PNG_EXPORT(146, void, png_set_oFFs, |
2175 | (png_structp png_ptr, png_infop info_ptr, | 2175 | (png_structp png_ptr, png_infop info_ptr, |
2176 | png_int_32 offset_x, png_int_32 offset_y, int unit_type)); | 2176 | png_int_32 offset_x, png_int_32 offset_y, int unit_type)); |
2177 | #endif | 2177 | #endif |
2178 | 2178 | ||
2179 | #ifdef PNG_pCAL_SUPPORTED | 2179 | #ifdef PNG_pCAL_SUPPORTED |
2180 | PNG_EXPORT(147, png_uint_32, png_get_pCAL, | 2180 | PNG_EXPORT(147, png_uint_32, png_get_pCAL, |
2181 | (png_const_structp png_ptr, png_const_infop info_ptr, | 2181 | (png_const_structp png_ptr, png_const_infop info_ptr, |
2182 | png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, | 2182 | png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, |
2183 | int *nparams, | 2183 | int *nparams, |
2184 | png_charp *units, png_charpp *params)); | 2184 | png_charp *units, png_charpp *params)); |
2185 | #endif | 2185 | #endif |
2186 | 2186 | ||
2187 | #ifdef PNG_pCAL_SUPPORTED | 2187 | #ifdef PNG_pCAL_SUPPORTED |
2188 | PNG_EXPORT(148, void, png_set_pCAL, (png_structp png_ptr, | 2188 | PNG_EXPORT(148, void, png_set_pCAL, (png_structp png_ptr, |
2189 | png_infop info_ptr, | 2189 | png_infop info_ptr, |
2190 | png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, | 2190 | png_const_charp purpose, png_int_32 X0, png_int_32 X1, int type, |
2191 | int nparams, png_const_charp units, png_charpp params)); | 2191 | int nparams, png_const_charp units, png_charpp params)); |
2192 | #endif | 2192 | #endif |
2193 | 2193 | ||
2194 | #ifdef PNG_pHYs_SUPPORTED | 2194 | #ifdef PNG_pHYs_SUPPORTED |
2195 | PNG_EXPORT(149, png_uint_32, png_get_pHYs, | 2195 | PNG_EXPORT(149, png_uint_32, png_get_pHYs, |
2196 | (png_const_structp png_ptr, png_const_infop info_ptr, | 2196 | (png_const_structp png_ptr, png_const_infop info_ptr, |
2197 | png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); | 2197 | png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); |
2198 | #endif | 2198 | #endif |
2199 | 2199 | ||
2200 | #ifdef PNG_pHYs_SUPPORTED | 2200 | #ifdef PNG_pHYs_SUPPORTED |
2201 | PNG_EXPORT(150, void, png_set_pHYs, | 2201 | PNG_EXPORT(150, void, png_set_pHYs, |
2202 | (png_structp png_ptr, png_infop info_ptr, | 2202 | (png_structp png_ptr, png_infop info_ptr, |
2203 | png_uint_32 res_x, png_uint_32 res_y, int unit_type)); | 2203 | png_uint_32 res_x, png_uint_32 res_y, int unit_type)); |
2204 | #endif | 2204 | #endif |
2205 | 2205 | ||
2206 | PNG_EXPORT(151, png_uint_32, png_get_PLTE, | 2206 | PNG_EXPORT(151, png_uint_32, png_get_PLTE, |
2207 | (png_const_structp png_ptr, png_const_infop info_ptr, | 2207 | (png_const_structp png_ptr, png_const_infop info_ptr, |
2208 | png_colorp *palette, int *num_palette)); | 2208 | png_colorp *palette, int *num_palette)); |
2209 | 2209 | ||
2210 | PNG_EXPORT(152, void, png_set_PLTE, | 2210 | PNG_EXPORT(152, void, png_set_PLTE, |
2211 | (png_structp png_ptr, png_infop info_ptr, | 2211 | (png_structp png_ptr, png_infop info_ptr, |
2212 | png_const_colorp palette, int num_palette)); | 2212 | png_const_colorp palette, int num_palette)); |
2213 | 2213 | ||
2214 | #ifdef PNG_sBIT_SUPPORTED | 2214 | #ifdef PNG_sBIT_SUPPORTED |
2215 | PNG_EXPORT(153, png_uint_32, png_get_sBIT, | 2215 | PNG_EXPORT(153, png_uint_32, png_get_sBIT, |
2216 | (png_const_structp png_ptr, png_infop info_ptr, | 2216 | (png_const_structp png_ptr, png_infop info_ptr, |
2217 | png_color_8p *sig_bit)); | 2217 | png_color_8p *sig_bit)); |
2218 | #endif | 2218 | #endif |
2219 | 2219 | ||
2220 | #ifdef PNG_sBIT_SUPPORTED | 2220 | #ifdef PNG_sBIT_SUPPORTED |
2221 | PNG_EXPORT(154, void, png_set_sBIT, | 2221 | PNG_EXPORT(154, void, png_set_sBIT, |
2222 | (png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit)); | 2222 | (png_structp png_ptr, png_infop info_ptr, png_const_color_8p sig_bit)); |
2223 | #endif | 2223 | #endif |
2224 | 2224 | ||
2225 | #ifdef PNG_sRGB_SUPPORTED | 2225 | #ifdef PNG_sRGB_SUPPORTED |
2226 | PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structp png_ptr, | 2226 | PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structp png_ptr, |
2227 | png_const_infop info_ptr, int *file_srgb_intent)); | 2227 | png_const_infop info_ptr, int *file_srgb_intent)); |
2228 | #endif | 2228 | #endif |
2229 | 2229 | ||
2230 | #ifdef PNG_sRGB_SUPPORTED | 2230 | #ifdef PNG_sRGB_SUPPORTED |
2231 | PNG_EXPORT(156, void, png_set_sRGB, | 2231 | PNG_EXPORT(156, void, png_set_sRGB, |
2232 | (png_structp png_ptr, png_infop info_ptr, int srgb_intent)); | 2232 | (png_structp png_ptr, png_infop info_ptr, int srgb_intent)); |
2233 | PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_structp png_ptr, | 2233 | PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_structp png_ptr, |
2234 | png_infop info_ptr, int srgb_intent)); | 2234 | png_infop info_ptr, int srgb_intent)); |
2235 | #endif | 2235 | #endif |
2236 | 2236 | ||
2237 | #ifdef PNG_iCCP_SUPPORTED | 2237 | #ifdef PNG_iCCP_SUPPORTED |
2238 | PNG_EXPORT(158, png_uint_32, png_get_iCCP, | 2238 | PNG_EXPORT(158, png_uint_32, png_get_iCCP, |
2239 | (png_const_structp png_ptr, png_const_infop info_ptr, | 2239 | (png_const_structp png_ptr, png_const_infop info_ptr, |
2240 | png_charpp name, int *compression_type, png_bytepp profile, | 2240 | png_charpp name, int *compression_type, png_bytepp profile, |
2241 | png_uint_32 *proflen)); | 2241 | png_uint_32 *proflen)); |
2242 | #endif | 2242 | #endif |
2243 | 2243 | ||
2244 | #ifdef PNG_iCCP_SUPPORTED | 2244 | #ifdef PNG_iCCP_SUPPORTED |
2245 | PNG_EXPORT(159, void, png_set_iCCP, | 2245 | PNG_EXPORT(159, void, png_set_iCCP, |
2246 | (png_structp png_ptr, png_infop info_ptr, | 2246 | (png_structp png_ptr, png_infop info_ptr, |
2247 | png_const_charp name, int compression_type, png_const_bytep profile, | 2247 | png_const_charp name, int compression_type, png_const_bytep profile, |
2248 | png_uint_32 proflen)); | 2248 | png_uint_32 proflen)); |
2249 | #endif | 2249 | #endif |
2250 | 2250 | ||
2251 | #ifdef PNG_sPLT_SUPPORTED | 2251 | #ifdef PNG_sPLT_SUPPORTED |
2252 | PNG_EXPORT(160, png_uint_32, png_get_sPLT, | 2252 | PNG_EXPORT(160, png_uint_32, png_get_sPLT, |
2253 | (png_const_structp png_ptr, png_const_infop info_ptr, | 2253 | (png_const_structp png_ptr, png_const_infop info_ptr, |
2254 | png_sPLT_tpp entries)); | 2254 | png_sPLT_tpp entries)); |
2255 | #endif | 2255 | #endif |
2256 | 2256 | ||
2257 | #ifdef PNG_sPLT_SUPPORTED | 2257 | #ifdef PNG_sPLT_SUPPORTED |
2258 | PNG_EXPORT(161, void, png_set_sPLT, | 2258 | PNG_EXPORT(161, void, png_set_sPLT, |
2259 | (png_structp png_ptr, png_infop info_ptr, | 2259 | (png_structp png_ptr, png_infop info_ptr, |
2260 | png_const_sPLT_tp entries, int nentries)); | 2260 | png_const_sPLT_tp entries, int nentries)); |
2261 | #endif | 2261 | #endif |
2262 | 2262 | ||
2263 | #ifdef PNG_TEXT_SUPPORTED | 2263 | #ifdef PNG_TEXT_SUPPORTED |
2264 | /* png_get_text also returns the number of text chunks in *num_text */ | 2264 | /* png_get_text also returns the number of text chunks in *num_text */ |
2265 | PNG_EXPORT(162, png_uint_32, png_get_text, | 2265 | PNG_EXPORT(162, png_uint_32, png_get_text, |
2266 | (png_const_structp png_ptr, png_const_infop info_ptr, | 2266 | (png_const_structp png_ptr, png_const_infop info_ptr, |
2267 | png_textp *text_ptr, int *num_text)); | 2267 | png_textp *text_ptr, int *num_text)); |
2268 | #endif | 2268 | #endif |
2269 | 2269 | ||
2270 | /* Note while png_set_text() will accept a structure whose text, | 2270 | /* Note while png_set_text() will accept a structure whose text, |
2271 | * language, and translated keywords are NULL pointers, the structure | 2271 | * language, and translated keywords are NULL pointers, the structure |
2272 | * returned by png_get_text will always contain regular | 2272 | * returned by png_get_text will always contain regular |
2273 | * zero-terminated C strings. They might be empty strings but | 2273 | * zero-terminated C strings. They might be empty strings but |
2274 | * they will never be NULL pointers. | 2274 | * they will never be NULL pointers. |
2275 | */ | 2275 | */ |
2276 | 2276 | ||
2277 | #ifdef PNG_TEXT_SUPPORTED | 2277 | #ifdef PNG_TEXT_SUPPORTED |
2278 | PNG_EXPORT(163, void, png_set_text, | 2278 | PNG_EXPORT(163, void, png_set_text, |
2279 | (png_structp png_ptr, png_infop info_ptr, | 2279 | (png_structp png_ptr, png_infop info_ptr, |
2280 | png_const_textp text_ptr, int num_text)); | 2280 | png_const_textp text_ptr, int num_text)); |
2281 | #endif | 2281 | #endif |
2282 | 2282 | ||
2283 | #ifdef PNG_tIME_SUPPORTED | 2283 | #ifdef PNG_tIME_SUPPORTED |
2284 | PNG_EXPORT(164, png_uint_32, png_get_tIME, | 2284 | PNG_EXPORT(164, png_uint_32, png_get_tIME, |
2285 | (png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time)); | 2285 | (png_const_structp png_ptr, png_infop info_ptr, png_timep *mod_time)); |
2286 | #endif | 2286 | #endif |
2287 | 2287 | ||
2288 | #ifdef PNG_tIME_SUPPORTED | 2288 | #ifdef PNG_tIME_SUPPORTED |
2289 | PNG_EXPORT(165, void, png_set_tIME, | 2289 | PNG_EXPORT(165, void, png_set_tIME, |
2290 | (png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)); | 2290 | (png_structp png_ptr, png_infop info_ptr, png_const_timep mod_time)); |
2291 | #endif | 2291 | #endif |
2292 | 2292 | ||
2293 | #ifdef PNG_tRNS_SUPPORTED | 2293 | #ifdef PNG_tRNS_SUPPORTED |
2294 | PNG_EXPORT(166, png_uint_32, png_get_tRNS, | 2294 | PNG_EXPORT(166, png_uint_32, png_get_tRNS, |
2295 | (png_const_structp png_ptr, png_infop info_ptr, | 2295 | (png_const_structp png_ptr, png_infop info_ptr, |
2296 | png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)); | 2296 | png_bytep *trans_alpha, int *num_trans, png_color_16p *trans_color)); |
2297 | #endif | 2297 | #endif |
2298 | 2298 | ||
2299 | #ifdef PNG_tRNS_SUPPORTED | 2299 | #ifdef PNG_tRNS_SUPPORTED |
2300 | PNG_EXPORT(167, void, png_set_tRNS, | 2300 | PNG_EXPORT(167, void, png_set_tRNS, |
2301 | (png_structp png_ptr, png_infop info_ptr, | 2301 | (png_structp png_ptr, png_infop info_ptr, |
2302 | png_const_bytep trans_alpha, int num_trans, | 2302 | png_const_bytep trans_alpha, int num_trans, |
2303 | png_const_color_16p trans_color)); | 2303 | png_const_color_16p trans_color)); |
2304 | #endif | 2304 | #endif |
2305 | 2305 | ||
2306 | #ifdef PNG_sCAL_SUPPORTED | 2306 | #ifdef PNG_sCAL_SUPPORTED |
2307 | PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, | 2307 | PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, |
2308 | (png_const_structp png_ptr, png_const_infop info_ptr, | 2308 | (png_const_structp png_ptr, png_const_infop info_ptr, |
2309 | int *unit, double *width, double *height)); | 2309 | int *unit, double *width, double *height)); |
2310 | #ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED | 2310 | #ifdef PNG_FLOATING_ARITHMETIC_SUPPORTED |
2311 | /* NOTE: this API is currently implemented using floating point arithmetic, | 2311 | /* NOTE: this API is currently implemented using floating point arithmetic, |
2312 | * consequently it can only be used on systems with floating point support. | 2312 | * consequently it can only be used on systems with floating point support. |
2313 | * In any case the range of values supported by png_fixed_point is small and it | 2313 | * In any case the range of values supported by png_fixed_point is small and it |
2314 | * is highly recommended that png_get_sCAL_s be used instead. | 2314 | * is highly recommended that png_get_sCAL_s be used instead. |
2315 | */ | 2315 | */ |
2316 | PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed, | 2316 | PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed, |
2317 | (png_structp png_ptr, png_const_infop info_ptr, int *unit, | 2317 | (png_structp png_ptr, png_const_infop info_ptr, int *unit, |
2318 | png_fixed_point *width, | 2318 | png_fixed_point *width, |
2319 | png_fixed_point *height)); | 2319 | png_fixed_point *height)); |
2320 | #endif | 2320 | #endif |
2321 | PNG_EXPORT(169, png_uint_32, png_get_sCAL_s, | 2321 | PNG_EXPORT(169, png_uint_32, png_get_sCAL_s, |
2322 | (png_const_structp png_ptr, png_const_infop info_ptr, | 2322 | (png_const_structp png_ptr, png_const_infop info_ptr, |
2323 | int *unit, png_charpp swidth, png_charpp sheight)); | 2323 | int *unit, png_charpp swidth, png_charpp sheight)); |
2324 | 2324 | ||
2325 | PNG_FP_EXPORT(170, void, png_set_sCAL, | 2325 | PNG_FP_EXPORT(170, void, png_set_sCAL, |
2326 | (png_structp png_ptr, png_infop info_ptr, | 2326 | (png_structp png_ptr, png_infop info_ptr, |
2327 | int unit, double width, double height)); | 2327 | int unit, double width, double height)); |
2328 | PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr, | 2328 | PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_structp png_ptr, |
2329 | png_infop info_ptr, int unit, png_fixed_point width, | 2329 | png_infop info_ptr, int unit, png_fixed_point width, |
2330 | png_fixed_point height)); | 2330 | png_fixed_point height)); |
2331 | PNG_EXPORT(171, void, png_set_sCAL_s, | 2331 | PNG_EXPORT(171, void, png_set_sCAL_s, |
2332 | (png_structp png_ptr, png_infop info_ptr, | 2332 | (png_structp png_ptr, png_infop info_ptr, |
2333 | int unit, png_const_charp swidth, png_const_charp sheight)); | 2333 | int unit, png_const_charp swidth, png_const_charp sheight)); |
2334 | #endif /* PNG_sCAL_SUPPORTED */ | 2334 | #endif /* PNG_sCAL_SUPPORTED */ |
2335 | 2335 | ||
2336 | #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED | 2336 | #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED |
2337 | /* Provide a list of chunks and how they are to be handled, if the built-in | 2337 | /* Provide a list of chunks and how they are to be handled, if the built-in |
2338 | handling or default unknown chunk handling is not desired. Any chunks not | 2338 | handling or default unknown chunk handling is not desired. Any chunks not |
2339 | listed will be handled in the default manner. The IHDR and IEND chunks | 2339 | listed will be handled in the default manner. The IHDR and IEND chunks |
2340 | must not be listed. Because this turns off the default handling for chunks | 2340 | must not be listed. Because this turns off the default handling for chunks |
2341 | that would otherwise be recognized the behavior of libpng transformations may | 2341 | that would otherwise be recognized the behavior of libpng transformations may |
2342 | well become incorrect! | 2342 | well become incorrect! |
2343 | keep = 0: PNG_HANDLE_CHUNK_AS_DEFAULT: follow default behavior | 2343 | keep = 0: PNG_HANDLE_CHUNK_AS_DEFAULT: follow default behavior |
2344 | = 1: PNG_HANDLE_CHUNK_NEVER: do not keep | 2344 | = 1: PNG_HANDLE_CHUNK_NEVER: do not keep |
2345 | = 2: PNG_HANDLE_CHUNK_IF_SAFE: keep only if safe-to-copy | 2345 | = 2: PNG_HANDLE_CHUNK_IF_SAFE: keep only if safe-to-copy |
2346 | = 3: PNG_HANDLE_CHUNK_ALWAYS: keep even if unsafe-to-copy | 2346 | = 3: PNG_HANDLE_CHUNK_ALWAYS: keep even if unsafe-to-copy |
2347 | */ | 2347 | */ |
2348 | PNG_EXPORT(172, void, png_set_keep_unknown_chunks, | 2348 | PNG_EXPORT(172, void, png_set_keep_unknown_chunks, |
2349 | (png_structp png_ptr, int keep, | 2349 | (png_structp png_ptr, int keep, |
2350 | png_const_bytep chunk_list, int num_chunks)); | 2350 | png_const_bytep chunk_list, int num_chunks)); |
2351 | 2351 | ||
2352 | /* The handling code is returned; the result is therefore true (non-zero) if | 2352 | /* The handling code is returned; the result is therefore true (non-zero) if |
2353 | * special handling is required, false for the default handling. | 2353 | * special handling is required, false for the default handling. |
2354 | */ | 2354 | */ |
2355 | PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr, | 2355 | PNG_EXPORT(173, int, png_handle_as_unknown, (png_structp png_ptr, |
2356 | png_const_bytep chunk_name)); | 2356 | png_const_bytep chunk_name)); |
2357 | #endif | 2357 | #endif |
2358 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED | 2358 | #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED |
2359 | PNG_EXPORT(174, void, png_set_unknown_chunks, (png_structp png_ptr, | 2359 | PNG_EXPORT(174, void, png_set_unknown_chunks, (png_structp png_ptr, |
2360 | png_infop info_ptr, png_const_unknown_chunkp unknowns, | 2360 | png_infop info_ptr, png_const_unknown_chunkp unknowns, |
2361 | int num_unknowns)); | 2361 | int num_unknowns)); |
2362 | PNG_EXPORT(175, void, png_set_unknown_chunk_location, | 2362 | PNG_EXPORT(175, void, png_set_unknown_chunk_location, |
2363 | (png_structp png_ptr, png_infop info_ptr, int chunk, int location)); | 2363 | (png_structp png_ptr, png_infop info_ptr, int chunk, int location)); |
2364 | PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structp png_ptr, | 2364 | PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structp png_ptr, |
2365 | png_const_infop info_ptr, png_unknown_chunkpp entries)); | 2365 | png_const_infop info_ptr, png_unknown_chunkpp entries)); |
2366 | #endif | 2366 | #endif |
2367 | 2367 | ||
2368 | /* Png_free_data() will turn off the "valid" flag for anything it frees. | 2368 | /* Png_free_data() will turn off the "valid" flag for anything it frees. |
2369 | * If you need to turn it off for a chunk that your application has freed, | 2369 | * If you need to turn it off for a chunk that your application has freed, |
2370 | * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); | 2370 | * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); |
2371 | */ | 2371 | */ |
2372 | PNG_EXPORT(177, void, png_set_invalid, | 2372 | PNG_EXPORT(177, void, png_set_invalid, |
2373 | (png_structp png_ptr, png_infop info_ptr, int mask)); | 2373 | (png_structp png_ptr, png_infop info_ptr, int mask)); |
2374 | 2374 | ||
2375 | #ifdef PNG_INFO_IMAGE_SUPPORTED | 2375 | #ifdef PNG_INFO_IMAGE_SUPPORTED |
2376 | /* The "params" pointer is currently not used and is for future expansion. */ | 2376 | /* The "params" pointer is currently not used and is for future expansion. */ |
2377 | PNG_EXPORT(178, void, png_read_png, (png_structp png_ptr, png_infop info_ptr, | 2377 | PNG_EXPORT(178, void, png_read_png, (png_structp png_ptr, png_infop info_ptr, |
2378 | int transforms, png_voidp params)); | 2378 | int transforms, png_voidp params)); |
2379 | PNG_EXPORT(179, void, png_write_png, (png_structp png_ptr, png_infop info_ptr, | 2379 | PNG_EXPORT(179, void, png_write_png, (png_structp png_ptr, png_infop info_ptr, |
2380 | int transforms, png_voidp params)); | 2380 | int transforms, png_voidp params)); |
2381 | #endif | 2381 | #endif |
2382 | 2382 | ||
2383 | PNG_EXPORT(180, png_const_charp, png_get_copyright, | 2383 | PNG_EXPORT(180, png_const_charp, png_get_copyright, |
2384 | (png_const_structp png_ptr)); | 2384 | (png_const_structp png_ptr)); |
2385 | PNG_EXPORT(181, png_const_charp, png_get_header_ver, | 2385 | PNG_EXPORT(181, png_const_charp, png_get_header_ver, |
2386 | (png_const_structp png_ptr)); | 2386 | (png_const_structp png_ptr)); |
2387 | PNG_EXPORT(182, png_const_charp, png_get_header_version, | 2387 | PNG_EXPORT(182, png_const_charp, png_get_header_version, |
2388 | (png_const_structp png_ptr)); | 2388 | (png_const_structp png_ptr)); |
2389 | PNG_EXPORT(183, png_const_charp, png_get_libpng_ver, | 2389 | PNG_EXPORT(183, png_const_charp, png_get_libpng_ver, |
2390 | (png_const_structp png_ptr)); | 2390 | (png_const_structp png_ptr)); |
2391 | 2391 | ||
2392 | #ifdef PNG_MNG_FEATURES_SUPPORTED | 2392 | #ifdef PNG_MNG_FEATURES_SUPPORTED |
2393 | PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr, | 2393 | PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structp png_ptr, |
2394 | png_uint_32 mng_features_permitted)); | 2394 | png_uint_32 mng_features_permitted)); |
2395 | #endif | 2395 | #endif |
2396 | 2396 | ||
2397 | /* For use in png_set_keep_unknown, added to version 1.2.6 */ | 2397 | /* For use in png_set_keep_unknown, added to version 1.2.6 */ |
2398 | #define PNG_HANDLE_CHUNK_AS_DEFAULT 0 | 2398 | #define PNG_HANDLE_CHUNK_AS_DEFAULT 0 |
2399 | #define PNG_HANDLE_CHUNK_NEVER 1 | 2399 | #define PNG_HANDLE_CHUNK_NEVER 1 |
2400 | #define PNG_HANDLE_CHUNK_IF_SAFE 2 | 2400 | #define PNG_HANDLE_CHUNK_IF_SAFE 2 |
2401 | #define PNG_HANDLE_CHUNK_ALWAYS 3 | 2401 | #define PNG_HANDLE_CHUNK_ALWAYS 3 |
2402 | 2402 | ||
2403 | /* Strip the prepended error numbers ("#nnn ") from error and warning | 2403 | /* Strip the prepended error numbers ("#nnn ") from error and warning |
2404 | * messages before passing them to the error or warning handler. | 2404 | * messages before passing them to the error or warning handler. |
2405 | */ | 2405 | */ |
2406 | #ifdef PNG_ERROR_NUMBERS_SUPPORTED | 2406 | #ifdef PNG_ERROR_NUMBERS_SUPPORTED |
2407 | PNG_EXPORT(185, void, png_set_strip_error_numbers, | 2407 | PNG_EXPORT(185, void, png_set_strip_error_numbers, |
2408 | (png_structp png_ptr, | 2408 | (png_structp png_ptr, |
2409 | png_uint_32 strip_mode)); | 2409 | png_uint_32 strip_mode)); |
2410 | #endif | 2410 | #endif |
2411 | 2411 | ||
2412 | /* Added in libpng-1.2.6 */ | 2412 | /* Added in libpng-1.2.6 */ |
2413 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED | 2413 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED |
2414 | PNG_EXPORT(186, void, png_set_user_limits, (png_structp png_ptr, | 2414 | PNG_EXPORT(186, void, png_set_user_limits, (png_structp png_ptr, |
2415 | png_uint_32 user_width_max, png_uint_32 user_height_max)); | 2415 | png_uint_32 user_width_max, png_uint_32 user_height_max)); |
2416 | PNG_EXPORT(187, png_uint_32, png_get_user_width_max, | 2416 | PNG_EXPORT(187, png_uint_32, png_get_user_width_max, |
2417 | (png_const_structp png_ptr)); | 2417 | (png_const_structp png_ptr)); |
2418 | PNG_EXPORT(188, png_uint_32, png_get_user_height_max, | 2418 | PNG_EXPORT(188, png_uint_32, png_get_user_height_max, |
2419 | (png_const_structp png_ptr)); | 2419 | (png_const_structp png_ptr)); |
2420 | /* Added in libpng-1.4.0 */ | 2420 | /* Added in libpng-1.4.0 */ |
2421 | PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structp png_ptr, | 2421 | PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structp png_ptr, |
2422 | png_uint_32 user_chunk_cache_max)); | 2422 | png_uint_32 user_chunk_cache_max)); |
2423 | PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max, | 2423 | PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max, |
2424 | (png_const_structp png_ptr)); | 2424 | (png_const_structp png_ptr)); |
2425 | /* Added in libpng-1.4.1 */ | 2425 | /* Added in libpng-1.4.1 */ |
2426 | PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structp png_ptr, | 2426 | PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structp png_ptr, |
2427 | png_alloc_size_t user_chunk_cache_max)); | 2427 | png_alloc_size_t user_chunk_cache_max)); |
2428 | PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max, | 2428 | PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max, |
2429 | (png_const_structp png_ptr)); | 2429 | (png_const_structp png_ptr)); |
2430 | #endif | 2430 | #endif |
2431 | 2431 | ||
2432 | #if defined(PNG_INCH_CONVERSIONS_SUPPORTED) | 2432 | #if defined(PNG_INCH_CONVERSIONS_SUPPORTED) |
2433 | PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch, | 2433 | PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch, |
2434 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2434 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2435 | 2435 | ||
2436 | PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch, | 2436 | PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch, |
2437 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2437 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2438 | 2438 | ||
2439 | PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch, | 2439 | PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch, |
2440 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2440 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2441 | 2441 | ||
2442 | PNG_FP_EXPORT(196, float, png_get_x_offset_inches, | 2442 | PNG_FP_EXPORT(196, float, png_get_x_offset_inches, |
2443 | (png_const_structp png_ptr, png_const_infop info_ptr)); | 2443 | (png_const_structp png_ptr, png_const_infop info_ptr)); |
2444 | #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ | 2444 | #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ |
2445 | PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed, | 2445 | PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed, |
2446 | (png_structp png_ptr, png_const_infop info_ptr)); | 2446 | (png_structp png_ptr, png_const_infop info_ptr)); |
2447 | #endif | 2447 | #endif |
2448 | 2448 | ||
2449 | PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr, | 2449 | PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structp png_ptr, |
2450 | png_const_infop info_ptr)); | 2450 | png_const_infop info_ptr)); |
2451 | #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ | 2451 | #ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */ |
2452 | PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed, | 2452 | PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed, |
2453 | (png_structp png_ptr, png_const_infop info_ptr)); | 2453 | (png_structp png_ptr, png_const_infop info_ptr)); |
2454 | #endif | 2454 | #endif |
2455 | 2455 | ||
2456 | # ifdef PNG_pHYs_SUPPORTED | 2456 | # ifdef PNG_pHYs_SUPPORTED |
2457 | PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structp png_ptr, | 2457 | PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structp png_ptr, |
2458 | png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, | 2458 | png_const_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, |
2459 | int *unit_type)); | 2459 | int *unit_type)); |
2460 | # endif /* PNG_pHYs_SUPPORTED */ | 2460 | # endif /* PNG_pHYs_SUPPORTED */ |
2461 | #endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ | 2461 | #endif /* PNG_INCH_CONVERSIONS_SUPPORTED */ |
2462 | 2462 | ||
2463 | /* Added in libpng-1.4.0 */ | 2463 | /* Added in libpng-1.4.0 */ |
2464 | #ifdef PNG_IO_STATE_SUPPORTED | 2464 | #ifdef PNG_IO_STATE_SUPPORTED |
2465 | PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_structp png_ptr)); | 2465 | PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_structp png_ptr)); |
2466 | 2466 | ||
2467 | PNG_EXPORTA(200, png_const_bytep, png_get_io_chunk_name, | 2467 | PNG_EXPORTA(200, png_const_bytep, png_get_io_chunk_name, |
2468 | (png_structp png_ptr), PNG_DEPRECATED); | 2468 | (png_structp png_ptr), PNG_DEPRECATED); |
2469 | PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, | 2469 | PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type, |
2470 | (png_const_structp png_ptr)); | 2470 | (png_const_structp png_ptr)); |
2471 | 2471 | ||
2472 | /* The flags returned by png_get_io_state() are the following: */ | 2472 | /* The flags returned by png_get_io_state() are the following: */ |
2473 | # define PNG_IO_NONE 0x0000 /* no I/O at this moment */ | 2473 | # define PNG_IO_NONE 0x0000 /* no I/O at this moment */ |
2474 | # define PNG_IO_READING 0x0001 /* currently reading */ | 2474 | # define PNG_IO_READING 0x0001 /* currently reading */ |
2475 | # define PNG_IO_WRITING 0x0002 /* currently writing */ | 2475 | # define PNG_IO_WRITING 0x0002 /* currently writing */ |
2476 | # define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */ | 2476 | # define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */ |
2477 | # define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */ | 2477 | # define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */ |
2478 | # define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */ | 2478 | # define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */ |
2479 | # define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */ | 2479 | # define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */ |
2480 | # define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */ | 2480 | # define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */ |
2481 | # define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */ | 2481 | # define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */ |
2482 | #endif /* ?PNG_IO_STATE_SUPPORTED */ | 2482 | #endif /* ?PNG_IO_STATE_SUPPORTED */ |
2483 | 2483 | ||
2484 | /* Interlace support. The following macros are always defined so that if | 2484 | /* Interlace support. The following macros are always defined so that if |
2485 | * libpng interlace handling is turned off the macros may be used to handle | 2485 | * libpng interlace handling is turned off the macros may be used to handle |
2486 | * interlaced images within the application. | 2486 | * interlaced images within the application. |
2487 | */ | 2487 | */ |
2488 | #define PNG_INTERLACE_ADAM7_PASSES 7 | 2488 | #define PNG_INTERLACE_ADAM7_PASSES 7 |
2489 | 2489 | ||
2490 | /* Two macros to return the first row and first column of the original, | 2490 | /* Two macros to return the first row and first column of the original, |
2491 | * full, image which appears in a given pass. 'pass' is in the range 0 | 2491 | * full, image which appears in a given pass. 'pass' is in the range 0 |
2492 | * to 6 and the result is in the range 0 to 7. | 2492 | * to 6 and the result is in the range 0 to 7. |
2493 | */ | 2493 | */ |
2494 | #define PNG_PASS_START_ROW(pass) (((1&~(pass))<<(3-((pass)>>1)))&7) | 2494 | #define PNG_PASS_START_ROW(pass) (((1&~(pass))<<(3-((pass)>>1)))&7) |
2495 | #define PNG_PASS_START_COL(pass) (((1& (pass))<<(3-(((pass)+1)>>1)))&7) | 2495 | #define PNG_PASS_START_COL(pass) (((1& (pass))<<(3-(((pass)+1)>>1)))&7) |
2496 | 2496 | ||
2497 | /* A macro to return the offset between pixels in the output row for a pair of | 2497 | /* A macro to return the offset between pixels in the output row for a pair of |
2498 | * pixels in the input - effectively the inverse of the 'COL_SHIFT' macro that | 2498 | * pixels in the input - effectively the inverse of the 'COL_SHIFT' macro that |
2499 | * follows. Note that ROW_OFFSET is the offset from one row to the next whereas | 2499 | * follows. Note that ROW_OFFSET is the offset from one row to the next whereas |
2500 | * COL_OFFSET is from one column to the next, within a row. | 2500 | * COL_OFFSET is from one column to the next, within a row. |
2501 | */ | 2501 | */ |
2502 | #define PNG_PASS_ROW_OFFSET(pass) ((pass)>2?(8>>(((pass)-1)>>1)):8) | 2502 | #define PNG_PASS_ROW_OFFSET(pass) ((pass)>2?(8>>(((pass)-1)>>1)):8) |
2503 | #define PNG_PASS_COL_OFFSET(pass) (1<<((7-(pass))>>1)) | 2503 | #define PNG_PASS_COL_OFFSET(pass) (1<<((7-(pass))>>1)) |
2504 | 2504 | ||
2505 | /* Two macros to help evaluate the number of rows or columns in each | 2505 | /* Two macros to help evaluate the number of rows or columns in each |
2506 | * pass. This is expressed as a shift - effectively log2 of the number or | 2506 | * pass. This is expressed as a shift - effectively log2 of the number or |
2507 | * rows or columns in each 8x8 tile of the original image. | 2507 | * rows or columns in each 8x8 tile of the original image. |
2508 | */ | 2508 | */ |
2509 | #define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) | 2509 | #define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3) |
2510 | #define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) | 2510 | #define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3) |
2511 | 2511 | ||
2512 | /* Hence two macros to determine the number of rows or columns in a given | 2512 | /* Hence two macros to determine the number of rows or columns in a given |
2513 | * pass of an image given its height or width. In fact these macros may | 2513 | * pass of an image given its height or width. In fact these macros may |
2514 | * return non-zero even though the sub-image is empty, because the other | 2514 | * return non-zero even though the sub-image is empty, because the other |
2515 | * dimension may be empty for a small image. | 2515 | * dimension may be empty for a small image. |
2516 | */ | 2516 | */ |
2517 | #define PNG_PASS_ROWS(height, pass) (((height)+(((1<<PNG_PASS_ROW_SHIFT(pass))\ | 2517 | #define PNG_PASS_ROWS(height, pass) (((height)+(((1<<PNG_PASS_ROW_SHIFT(pass))\ |
2518 | -1)-PNG_PASS_START_ROW(pass)))>>PNG_PASS_ROW_SHIFT(pass)) | 2518 | -1)-PNG_PASS_START_ROW(pass)))>>PNG_PASS_ROW_SHIFT(pass)) |
2519 | #define PNG_PASS_COLS(width, pass) (((width)+(((1<<PNG_PASS_COL_SHIFT(pass))\ | 2519 | #define PNG_PASS_COLS(width, pass) (((width)+(((1<<PNG_PASS_COL_SHIFT(pass))\ |
2520 | -1)-PNG_PASS_START_COL(pass)))>>PNG_PASS_COL_SHIFT(pass)) | 2520 | -1)-PNG_PASS_START_COL(pass)))>>PNG_PASS_COL_SHIFT(pass)) |
2521 | 2521 | ||
2522 | /* For the reader row callbacks (both progressive and sequential) it is | 2522 | /* For the reader row callbacks (both progressive and sequential) it is |
2523 | * necessary to find the row in the output image given a row in an interlaced | 2523 | * necessary to find the row in the output image given a row in an interlaced |
2524 | * image, so two more macros: | 2524 | * image, so two more macros: |
2525 | */ | 2525 | */ |
2526 | #define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ | 2526 | #define PNG_ROW_FROM_PASS_ROW(yIn, pass) \ |
2527 | (((yIn)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass)) | 2527 | (((yIn)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass)) |
2528 | #define PNG_COL_FROM_PASS_COL(xIn, pass) \ | 2528 | #define PNG_COL_FROM_PASS_COL(xIn, pass) \ |
2529 | (((xIn)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass)) | 2529 | (((xIn)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass)) |
2530 | 2530 | ||
2531 | /* Two macros which return a boolean (0 or 1) saying whether the given row | 2531 | /* Two macros which return a boolean (0 or 1) saying whether the given row |
2532 | * or column is in a particular pass. These use a common utility macro that | 2532 | * or column is in a particular pass. These use a common utility macro that |
2533 | * returns a mask for a given pass - the offset 'off' selects the row or | 2533 | * returns a mask for a given pass - the offset 'off' selects the row or |
2534 | * column version. The mask has the appropriate bit set for each column in | 2534 | * column version. The mask has the appropriate bit set for each column in |
2535 | * the tile. | 2535 | * the tile. |
2536 | */ | 2536 | */ |
2537 | #define PNG_PASS_MASK(pass,off) ( \ | 2537 | #define PNG_PASS_MASK(pass,off) ( \ |
2538 | ((0x110145AF>>(((7-(off))-(pass))<<2)) & 0xF) | \ | 2538 | ((0x110145AF>>(((7-(off))-(pass))<<2)) & 0xF) | \ |
2539 | ((0x01145AF0>>(((7-(off))-(pass))<<2)) & 0xF0)) | 2539 | ((0x01145AF0>>(((7-(off))-(pass))<<2)) & 0xF0)) |
2540 | 2540 | ||
2541 | #define PNG_ROW_IN_INTERLACE_PASS(y, pass) \ | 2541 | #define PNG_ROW_IN_INTERLACE_PASS(y, pass) \ |
2542 | ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) | 2542 | ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1) |
2543 | #define PNG_COL_IN_INTERLACE_PASS(x, pass) \ | 2543 | #define PNG_COL_IN_INTERLACE_PASS(x, pass) \ |
2544 | ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) | 2544 | ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1) |
2545 | 2545 | ||
2546 | #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED | 2546 | #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED |
2547 | /* With these routines we avoid an integer divide, which will be slower on | 2547 | /* With these routines we avoid an integer divide, which will be slower on |
2548 | * most machines. However, it does take more operations than the corresponding | 2548 | * most machines. However, it does take more operations than the corresponding |
2549 | * divide method, so it may be slower on a few RISC systems. There are two | 2549 | * divide method, so it may be slower on a few RISC systems. There are two |
2550 | * shifts (by 8 or 16 bits) and an addition, versus a single integer divide. | 2550 | * shifts (by 8 or 16 bits) and an addition, versus a single integer divide. |
2551 | * | 2551 | * |
2552 | * Note that the rounding factors are NOT supposed to be the same! 128 and | 2552 | * Note that the rounding factors are NOT supposed to be the same! 128 and |
2553 | * 32768 are correct for the NODIV code; 127 and 32767 are correct for the | 2553 | * 32768 are correct for the NODIV code; 127 and 32767 are correct for the |
2554 | * standard method. | 2554 | * standard method. |
2555 | * | 2555 | * |
2556 | * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ] | 2556 | * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ] |
2557 | */ | 2557 | */ |
2558 | 2558 | ||
2559 | /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ | 2559 | /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ |
2560 | 2560 | ||
2561 | # define png_composite(composite, fg, alpha, bg) \ | 2561 | # define png_composite(composite, fg, alpha, bg) \ |
2562 | { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \ | 2562 | { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) \ |
2563 | * (png_uint_16)(alpha) \ | 2563 | * (png_uint_16)(alpha) \ |
2564 | + (png_uint_16)(bg)*(png_uint_16)(255 \ | 2564 | + (png_uint_16)(bg)*(png_uint_16)(255 \ |
2565 | - (png_uint_16)(alpha)) + 128); \ | 2565 | - (png_uint_16)(alpha)) + 128); \ |
2566 | (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } | 2566 | (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } |
2567 | 2567 | ||
2568 | # define png_composite_16(composite, fg, alpha, bg) \ | 2568 | # define png_composite_16(composite, fg, alpha, bg) \ |
2569 | { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \ | 2569 | { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) \ |
2570 | * (png_uint_32)(alpha) \ | 2570 | * (png_uint_32)(alpha) \ |
2571 | + (png_uint_32)(bg)*(65535 \ | 2571 | + (png_uint_32)(bg)*(65535 \ |
2572 | - (png_uint_32)(alpha)) + 32768); \ | 2572 | - (png_uint_32)(alpha)) + 32768); \ |
2573 | (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } | 2573 | (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } |
2574 | 2574 | ||
2575 | #else /* Standard method using integer division */ | 2575 | #else /* Standard method using integer division */ |
2576 | 2576 | ||
2577 | # define png_composite(composite, fg, alpha, bg) \ | 2577 | # define png_composite(composite, fg, alpha, bg) \ |
2578 | (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ | 2578 | (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ |
2579 | (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ | 2579 | (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ |
2580 | 127) / 255) | 2580 | 127) / 255) |
2581 | 2581 | ||
2582 | # define png_composite_16(composite, fg, alpha, bg) \ | 2582 | # define png_composite_16(composite, fg, alpha, bg) \ |
2583 | (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ | 2583 | (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ |
2584 | (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \ | 2584 | (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \ |
2585 | 32767) / 65535) | 2585 | 32767) / 65535) |
2586 | #endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ | 2586 | #endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ |
2587 | 2587 | ||
2588 | #ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED | 2588 | #ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED |
2589 | PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf)); | 2589 | PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf)); |
2590 | PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf)); | 2590 | PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf)); |
2591 | PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf)); | 2591 | PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf)); |
2592 | #endif | 2592 | #endif |
2593 | 2593 | ||
2594 | PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_structp png_ptr, | 2594 | PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_structp png_ptr, |
2595 | png_const_bytep buf)); | 2595 | png_const_bytep buf)); |
2596 | /* No png_get_int_16 -- may be added if there's a real need for it. */ | 2596 | /* No png_get_int_16 -- may be added if there's a real need for it. */ |
2597 | 2597 | ||
2598 | /* Place a 32-bit number into a buffer in PNG byte order (big-endian). */ | 2598 | /* Place a 32-bit number into a buffer in PNG byte order (big-endian). */ |
2599 | #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED | 2599 | #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED |
2600 | PNG_EXPORT(205, void, png_save_uint_32, (png_bytep buf, png_uint_32 i)); | 2600 | PNG_EXPORT(205, void, png_save_uint_32, (png_bytep buf, png_uint_32 i)); |
2601 | #endif | 2601 | #endif |
2602 | #ifdef PNG_SAVE_INT_32_SUPPORTED | 2602 | #ifdef PNG_SAVE_INT_32_SUPPORTED |
2603 | PNG_EXPORT(206, void, png_save_int_32, (png_bytep buf, png_int_32 i)); | 2603 | PNG_EXPORT(206, void, png_save_int_32, (png_bytep buf, png_int_32 i)); |
2604 | #endif | 2604 | #endif |
2605 | 2605 | ||
2606 | /* Place a 16-bit number into a buffer in PNG byte order. | 2606 | /* Place a 16-bit number into a buffer in PNG byte order. |
2607 | * The parameter is declared unsigned int, not png_uint_16, | 2607 | * The parameter is declared unsigned int, not png_uint_16, |
2608 | * just to avoid potential problems on pre-ANSI C compilers. | 2608 | * just to avoid potential problems on pre-ANSI C compilers. |
2609 | */ | 2609 | */ |
2610 | #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED | 2610 | #ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED |
2611 | PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i)); | 2611 | PNG_EXPORT(207, void, png_save_uint_16, (png_bytep buf, unsigned int i)); |
2612 | /* No png_save_int_16 -- may be added if there's a real need for it. */ | 2612 | /* No png_save_int_16 -- may be added if there's a real need for it. */ |
2613 | #endif | 2613 | #endif |
2614 | 2614 | ||
2615 | #ifdef PNG_USE_READ_MACROS | 2615 | #ifdef PNG_USE_READ_MACROS |
2616 | /* Inline macros to do direct reads of bytes from the input buffer. | 2616 | /* Inline macros to do direct reads of bytes from the input buffer. |
2617 | * The png_get_int_32() routine assumes we are using two's complement | 2617 | * The png_get_int_32() routine assumes we are using two's complement |
2618 | * format for negative values, which is almost certainly true. | 2618 | * format for negative values, which is almost certainly true. |
2619 | */ | 2619 | */ |
2620 | # define png_get_uint_32(buf) \ | 2620 | # define png_get_uint_32(buf) \ |
2621 | (((png_uint_32)(*(buf)) << 24) + \ | 2621 | (((png_uint_32)(*(buf)) << 24) + \ |
2622 | ((png_uint_32)(*((buf) + 1)) << 16) + \ | 2622 | ((png_uint_32)(*((buf) + 1)) << 16) + \ |
2623 | ((png_uint_32)(*((buf) + 2)) << 8) + \ | 2623 | ((png_uint_32)(*((buf) + 2)) << 8) + \ |
2624 | ((png_uint_32)(*((buf) + 3)))) | 2624 | ((png_uint_32)(*((buf) + 3)))) |
2625 | 2625 | ||
2626 | /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the | 2626 | /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the |
2627 | * function) incorrectly returned a value of type png_uint_32. | 2627 | * function) incorrectly returned a value of type png_uint_32. |
2628 | */ | 2628 | */ |
2629 | # define png_get_uint_16(buf) \ | 2629 | # define png_get_uint_16(buf) \ |
2630 | ((png_uint_16) \ | 2630 | ((png_uint_16) \ |
2631 | (((unsigned int)(*(buf)) << 8) + \ | 2631 | (((unsigned int)(*(buf)) << 8) + \ |
2632 | ((unsigned int)(*((buf) + 1))))) | 2632 | ((unsigned int)(*((buf) + 1))))) |
2633 | 2633 | ||
2634 | # define png_get_int_32(buf) \ | 2634 | # define png_get_int_32(buf) \ |
2635 | ((png_int_32)((*(buf) & 0x80) \ | 2635 | ((png_int_32)((*(buf) & 0x80) \ |
2636 | ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \ | 2636 | ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \ |
2637 | : (png_int_32)png_get_uint_32(buf))) | 2637 | : (png_int_32)png_get_uint_32(buf))) |
2638 | #endif | 2638 | #endif |
2639 | 2639 | ||
2640 | /* Maintainer: Put new public prototypes here ^, in libpng.3, and project | 2640 | /* Maintainer: Put new public prototypes here ^, in libpng.3, and project |
2641 | * defs | 2641 | * defs |
2642 | */ | 2642 | */ |
2643 | 2643 | ||
2644 | /* The last ordinal number (this is the *last* one already used; the next | 2644 | /* The last ordinal number (this is the *last* one already used; the next |
2645 | * one to use is one more than this.) Maintainer, remember to add an entry to | 2645 | * one to use is one more than this.) Maintainer, remember to add an entry to |
2646 | * scripts/symbols.def as well. | 2646 | * scripts/symbols.def as well. |
2647 | */ | 2647 | */ |
2648 | #ifdef PNG_EXPORT_LAST_ORDINAL | 2648 | #ifdef PNG_EXPORT_LAST_ORDINAL |
2649 | PNG_EXPORT_LAST_ORDINAL(233); | 2649 | PNG_EXPORT_LAST_ORDINAL(233); |
2650 | #endif | 2650 | #endif |
2651 | 2651 | ||
2652 | #ifdef __cplusplus | 2652 | #ifdef __cplusplus |
2653 | } | 2653 | } |
2654 | #endif | 2654 | #endif |
2655 | 2655 | ||
2656 | #endif /* PNG_VERSION_INFO_ONLY */ | 2656 | #endif /* PNG_VERSION_INFO_ONLY */ |
2657 | /* Do not put anything past this line */ | 2657 | /* Do not put anything past this line */ |
2658 | #endif /* PNG_H */ | 2658 | #endif /* PNG_H */ |