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Unified Diff: third_party/libpng/png.h

Issue 1467263003: third_party/libpng: update to 1.2.54 (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 5 years, 1 month ago
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Index: third_party/libpng/png.h
diff --git a/third_party/libpng/png.h b/third_party/libpng/png.h
index ed9e429119dcdf102d6df48201eee04e3cdf1d4d..bbed688b73750c7f66bc26378c9b78c8f8486237 100644
--- a/third_party/libpng/png.h
+++ b/third_party/libpng/png.h
@@ -1,7 +1,9 @@
+
/* png.h - header file for PNG reference library
*
- * libpng version 1.2.52 - November 20, 2014
- * Copyright (c) 1998-2014 Glenn Randers-Pehrson
+ * libpng version 1.2.54, November 12, 2015
+ *
+ * Copyright (c) 1998-2015 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
@@ -9,310 +11,9 @@
*
* Authors and maintainers:
* libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
- * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- * libpng versions 0.97, January 1998, through 1.2.52 - November 20, 2014: Glenn
+ * libpng versions 0.89, June 1996, through 0.96, May 1997: Andreas Dilger
+ * libpng versions 0.97, January 1998, through 1.2.54, November 12, 2015: Glenn
* See also "Contributing Authors", below.
- *
- * Note about libpng version numbers:
- *
- * Due to various miscommunications, unforeseen code incompatibilities
- * and occasional factors outside the authors' control, version numbering
- * on the library has not always been consistent and straightforward.
- * The following table summarizes matters since version 0.89c, which was
- * the first widely used release:
- *
- * source png.h png.h shared-lib
- * version string int version
- * ------- ------ ----- ----------
- * 0.89c "1.0 beta 3" 0.89 89 1.0.89
- * 0.90 "1.0 beta 4" 0.90 90 0.90 [should have been 2.0.90]
- * 0.95 "1.0 beta 5" 0.95 95 0.95 [should have been 2.0.95]
- * 0.96 "1.0 beta 6" 0.96 96 0.96 [should have been 2.0.96]
- * 0.97b "1.00.97 beta 7" 1.00.97 97 1.0.1 [should have been 2.0.97]
- * 0.97c 0.97 97 2.0.97
- * 0.98 0.98 98 2.0.98
- * 0.99 0.99 98 2.0.99
- * 0.99a-m 0.99 99 2.0.99
- * 1.00 1.00 100 2.1.0 [100 should be 10000]
- * 1.0.0 (from here on, the 100 2.1.0 [100 should be 10000]
- * 1.0.1 png.h string is 10001 2.1.0
- * 1.0.1a-e identical to the 10002 from here on, the shared library
- * 1.0.2 source version) 10002 is 2.V where V is the source code
- * 1.0.2a-b 10003 version, except as noted.
- * 1.0.3 10003
- * 1.0.3a-d 10004
- * 1.0.4 10004
- * 1.0.4a-f 10005
- * 1.0.5 (+ 2 patches) 10005
- * 1.0.5a-d 10006
- * 1.0.5e-r 10100 (not source compatible)
- * 1.0.5s-v 10006 (not binary compatible)
- * 1.0.6 (+ 3 patches) 10006 (still binary incompatible)
- * 1.0.6d-f 10007 (still binary incompatible)
- * 1.0.6g 10007
- * 1.0.6h 10007 10.6h (testing xy.z so-numbering)
- * 1.0.6i 10007 10.6i
- * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0)
- * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible)
- * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible)
- * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible)
- * 1.0.7 1 10007 (still compatible)
- * 1.0.8beta1-4 1 10008 2.1.0.8beta1-4
- * 1.0.8rc1 1 10008 2.1.0.8rc1
- * 1.0.8 1 10008 2.1.0.8
- * 1.0.9beta1-6 1 10009 2.1.0.9beta1-6
- * 1.0.9rc1 1 10009 2.1.0.9rc1
- * 1.0.9beta7-10 1 10009 2.1.0.9beta7-10
- * 1.0.9rc2 1 10009 2.1.0.9rc2
- * 1.0.9 1 10009 2.1.0.9
- * 1.0.10beta1 1 10010 2.1.0.10beta1
- * 1.0.10rc1 1 10010 2.1.0.10rc1
- * 1.0.10 1 10010 2.1.0.10
- * 1.0.11beta1-3 1 10011 2.1.0.11beta1-3
- * 1.0.11rc1 1 10011 2.1.0.11rc1
- * 1.0.11 1 10011 2.1.0.11
- * 1.0.12beta1-2 2 10012 2.1.0.12beta1-2
- * 1.0.12rc1 2 10012 2.1.0.12rc1
- * 1.0.12 2 10012 2.1.0.12
- * 1.1.0a-f - 10100 2.1.1.0a-f (branch abandoned)
- * 1.2.0beta1-2 2 10200 2.1.2.0beta1-2
- * 1.2.0beta3-5 3 10200 3.1.2.0beta3-5
- * 1.2.0rc1 3 10200 3.1.2.0rc1
- * 1.2.0 3 10200 3.1.2.0
- * 1.2.1beta1-4 3 10201 3.1.2.1beta1-4
- * 1.2.1rc1-2 3 10201 3.1.2.1rc1-2
- * 1.2.1 3 10201 3.1.2.1
- * 1.2.2beta1-6 12 10202 12.so.0.1.2.2beta1-6
- * 1.0.13beta1 10 10013 10.so.0.1.0.13beta1
- * 1.0.13rc1 10 10013 10.so.0.1.0.13rc1
- * 1.2.2rc1 12 10202 12.so.0.1.2.2rc1
- * 1.0.13 10 10013 10.so.0.1.0.13
- * 1.2.2 12 10202 12.so.0.1.2.2
- * 1.2.3rc1-6 12 10203 12.so.0.1.2.3rc1-6
- * 1.2.3 12 10203 12.so.0.1.2.3
- * 1.2.4beta1-3 13 10204 12.so.0.1.2.4beta1-3
- * 1.0.14rc1 13 10014 10.so.0.1.0.14rc1
- * 1.2.4rc1 13 10204 12.so.0.1.2.4rc1
- * 1.0.14 10 10014 10.so.0.1.0.14
- * 1.2.4 13 10204 12.so.0.1.2.4
- * 1.2.5beta1-2 13 10205 12.so.0.1.2.5beta1-2
- * 1.0.15rc1-3 10 10015 10.so.0.1.0.15rc1-3
- * 1.2.5rc1-3 13 10205 12.so.0.1.2.5rc1-3
- * 1.0.15 10 10015 10.so.0.1.0.15
- * 1.2.5 13 10205 12.so.0.1.2.5
- * 1.2.6beta1-4 13 10206 12.so.0.1.2.6beta1-4
- * 1.0.16 10 10016 10.so.0.1.0.16
- * 1.2.6 13 10206 12.so.0.1.2.6
- * 1.2.7beta1-2 13 10207 12.so.0.1.2.7beta1-2
- * 1.0.17rc1 10 10017 10.so.0.1.0.17rc1
- * 1.2.7rc1 13 10207 12.so.0.1.2.7rc1
- * 1.0.17 10 10017 10.so.0.1.0.17
- * 1.2.7 13 10207 12.so.0.1.2.7
- * 1.2.8beta1-5 13 10208 12.so.0.1.2.8beta1-5
- * 1.0.18rc1-5 10 10018 10.so.0.1.0.18rc1-5
- * 1.2.8rc1-5 13 10208 12.so.0.1.2.8rc1-5
- * 1.0.18 10 10018 10.so.0.1.0.18
- * 1.2.8 13 10208 12.so.0.1.2.8
- * 1.2.9beta1-3 13 10209 12.so.0.1.2.9beta1-3
- * 1.2.9beta4-11 13 10209 12.so.0.9[.0]
- * 1.2.9rc1 13 10209 12.so.0.9[.0]
- * 1.2.9 13 10209 12.so.0.9[.0]
- * 1.2.10beta1-8 13 10210 12.so.0.10[.0]
- * 1.2.10rc1-3 13 10210 12.so.0.10[.0]
- * 1.2.10 13 10210 12.so.0.10[.0]
- * 1.2.11beta1-4 13 10211 12.so.0.11[.0]
- * 1.0.19rc1-5 10 10019 10.so.0.19[.0]
- * 1.2.11rc1-5 13 10211 12.so.0.11[.0]
- * 1.0.19 10 10019 10.so.0.19[.0]
- * 1.2.11 13 10211 12.so.0.11[.0]
- * 1.0.20 10 10020 10.so.0.20[.0]
- * 1.2.12 13 10212 12.so.0.12[.0]
- * 1.2.13beta1 13 10213 12.so.0.13[.0]
- * 1.0.21 10 10021 10.so.0.21[.0]
- * 1.2.13 13 10213 12.so.0.13[.0]
- * 1.2.14beta1-2 13 10214 12.so.0.14[.0]
- * 1.0.22rc1 10 10022 10.so.0.22[.0]
- * 1.2.14rc1 13 10214 12.so.0.14[.0]
- * 1.0.22 10 10022 10.so.0.22[.0]
- * 1.2.14 13 10214 12.so.0.14[.0]
- * 1.2.15beta1-6 13 10215 12.so.0.15[.0]
- * 1.0.23rc1-5 10 10023 10.so.0.23[.0]
- * 1.2.15rc1-5 13 10215 12.so.0.15[.0]
- * 1.0.23 10 10023 10.so.0.23[.0]
- * 1.2.15 13 10215 12.so.0.15[.0]
- * 1.2.16beta1-2 13 10216 12.so.0.16[.0]
- * 1.2.16rc1 13 10216 12.so.0.16[.0]
- * 1.0.24 10 10024 10.so.0.24[.0]
- * 1.2.16 13 10216 12.so.0.16[.0]
- * 1.2.17beta1-2 13 10217 12.so.0.17[.0]
- * 1.0.25rc1 10 10025 10.so.0.25[.0]
- * 1.2.17rc1-3 13 10217 12.so.0.17[.0]
- * 1.0.25 10 10025 10.so.0.25[.0]
- * 1.2.17 13 10217 12.so.0.17[.0]
- * 1.0.26 10 10026 10.so.0.26[.0]
- * 1.2.18 13 10218 12.so.0.18[.0]
- * 1.2.19beta1-31 13 10219 12.so.0.19[.0]
- * 1.0.27rc1-6 10 10027 10.so.0.27[.0]
- * 1.2.19rc1-6 13 10219 12.so.0.19[.0]
- * 1.0.27 10 10027 10.so.0.27[.0]
- * 1.2.19 13 10219 12.so.0.19[.0]
- * 1.2.20beta01-04 13 10220 12.so.0.20[.0]
- * 1.0.28rc1-6 10 10028 10.so.0.28[.0]
- * 1.2.20rc1-6 13 10220 12.so.0.20[.0]
- * 1.0.28 10 10028 10.so.0.28[.0]
- * 1.2.20 13 10220 12.so.0.20[.0]
- * 1.2.21beta1-2 13 10221 12.so.0.21[.0]
- * 1.2.21rc1-3 13 10221 12.so.0.21[.0]
- * 1.0.29 10 10029 10.so.0.29[.0]
- * 1.2.21 13 10221 12.so.0.21[.0]
- * 1.2.22beta1-4 13 10222 12.so.0.22[.0]
- * 1.0.30rc1 10 10030 10.so.0.30[.0]
- * 1.2.22rc1 13 10222 12.so.0.22[.0]
- * 1.0.30 10 10030 10.so.0.30[.0]
- * 1.2.22 13 10222 12.so.0.22[.0]
- * 1.2.23beta01-05 13 10223 12.so.0.23[.0]
- * 1.2.23rc01 13 10223 12.so.0.23[.0]
- * 1.2.23 13 10223 12.so.0.23[.0]
- * 1.2.24beta01-02 13 10224 12.so.0.24[.0]
- * 1.2.24rc01 13 10224 12.so.0.24[.0]
- * 1.2.24 13 10224 12.so.0.24[.0]
- * 1.2.25beta01-06 13 10225 12.so.0.25[.0]
- * 1.2.25rc01-02 13 10225 12.so.0.25[.0]
- * 1.0.31 10 10031 10.so.0.31[.0]
- * 1.2.25 13 10225 12.so.0.25[.0]
- * 1.2.26beta01-06 13 10226 12.so.0.26[.0]
- * 1.2.26rc01 13 10226 12.so.0.26[.0]
- * 1.2.26 13 10226 12.so.0.26[.0]
- * 1.0.32 10 10032 10.so.0.32[.0]
- * 1.2.27beta01-06 13 10227 12.so.0.27[.0]
- * 1.2.27rc01 13 10227 12.so.0.27[.0]
- * 1.0.33 10 10033 10.so.0.33[.0]
- * 1.2.27 13 10227 12.so.0.27[.0]
- * 1.0.34 10 10034 10.so.0.34[.0]
- * 1.2.28 13 10228 12.so.0.28[.0]
- * 1.2.29beta01-03 13 10229 12.so.0.29[.0]
- * 1.2.29rc01 13 10229 12.so.0.29[.0]
- * 1.0.35 10 10035 10.so.0.35[.0]
- * 1.2.29 13 10229 12.so.0.29[.0]
- * 1.0.37 10 10037 10.so.0.37[.0]
- * 1.2.30beta01-04 13 10230 12.so.0.30[.0]
- * 1.0.38rc01-08 10 10038 10.so.0.38[.0]
- * 1.2.30rc01-08 13 10230 12.so.0.30[.0]
- * 1.0.38 10 10038 10.so.0.38[.0]
- * 1.2.30 13 10230 12.so.0.30[.0]
- * 1.0.39rc01-03 10 10039 10.so.0.39[.0]
- * 1.2.31rc01-03 13 10231 12.so.0.31[.0]
- * 1.0.39 10 10039 10.so.0.39[.0]
- * 1.2.31 13 10231 12.so.0.31[.0]
- * 1.2.32beta01-02 13 10232 12.so.0.32[.0]
- * 1.0.40rc01 10 10040 10.so.0.40[.0]
- * 1.2.32rc01 13 10232 12.so.0.32[.0]
- * 1.0.40 10 10040 10.so.0.40[.0]
- * 1.2.32 13 10232 12.so.0.32[.0]
- * 1.2.33beta01-02 13 10233 12.so.0.33[.0]
- * 1.2.33rc01-02 13 10233 12.so.0.33[.0]
- * 1.0.41rc01 10 10041 10.so.0.41[.0]
- * 1.2.33 13 10233 12.so.0.33[.0]
- * 1.0.41 10 10041 10.so.0.41[.0]
- * 1.2.34beta01-07 13 10234 12.so.0.34[.0]
- * 1.0.42rc01 10 10042 10.so.0.42[.0]
- * 1.2.34rc01 13 10234 12.so.0.34[.0]
- * 1.0.42 10 10042 10.so.0.42[.0]
- * 1.2.34 13 10234 12.so.0.34[.0]
- * 1.2.35beta01-03 13 10235 12.so.0.35[.0]
- * 1.0.43rc01-02 10 10043 10.so.0.43[.0]
- * 1.2.35rc01-02 13 10235 12.so.0.35[.0]
- * 1.0.43 10 10043 10.so.0.43[.0]
- * 1.2.35 13 10235 12.so.0.35[.0]
- * 1.2.36beta01-05 13 10236 12.so.0.36[.0]
- * 1.2.36rc01 13 10236 12.so.0.36[.0]
- * 1.0.44 10 10044 10.so.0.44[.0]
- * 1.2.36 13 10236 12.so.0.36[.0]
- * 1.2.37beta01-03 13 10237 12.so.0.37[.0]
- * 1.2.37rc01 13 10237 12.so.0.37[.0]
- * 1.2.37 13 10237 12.so.0.37[.0]
- * 1.0.45 10 10045 12.so.0.45[.0]
- * 1.0.46 10 10046 10.so.0.46[.0]
- * 1.2.38beta01 13 10238 12.so.0.38[.0]
- * 1.2.38rc01-03 13 10238 12.so.0.38[.0]
- * 1.0.47 10 10047 10.so.0.47[.0]
- * 1.2.38 13 10238 12.so.0.38[.0]
- * 1.2.39beta01-05 13 10239 12.so.0.39[.0]
- * 1.2.39rc01 13 10239 12.so.0.39[.0]
- * 1.0.48 10 10048 10.so.0.48[.0]
- * 1.2.39 13 10239 12.so.0.39[.0]
- * 1.2.40beta01 13 10240 12.so.0.40[.0]
- * 1.2.40rc01 13 10240 12.so.0.40[.0]
- * 1.0.49 10 10049 10.so.0.49[.0]
- * 1.2.40 13 10240 12.so.0.40[.0]
- * 1.2.41beta01-18 13 10241 12.so.0.41[.0]
- * 1.0.51rc01 10 10051 10.so.0.51[.0]
- * 1.2.41rc01-03 13 10241 12.so.0.41[.0]
- * 1.0.51 10 10051 10.so.0.51[.0]
- * 1.2.41 13 10241 12.so.0.41[.0]
- * 1.2.42beta01-02 13 10242 12.so.0.42[.0]
- * 1.2.42rc01-05 13 10242 12.so.0.42[.0]
- * 1.0.52 10 10052 10.so.0.52[.0]
- * 1.2.42 13 10242 12.so.0.42[.0]
- * 1.2.43beta01-05 13 10243 12.so.0.43[.0]
- * 1.0.53rc01-02 10 10053 10.so.0.53[.0]
- * 1.2.43rc01-02 13 10243 12.so.0.43[.0]
- * 1.0.53 10 10053 10.so.0.53[.0]
- * 1.2.43 13 10243 12.so.0.43[.0]
- * 1.2.44beta01-03 13 10244 12.so.0.44[.0]
- * 1.2.44rc01-03 13 10244 12.so.0.44[.0]
- * 1.2.44 13 10244 12.so.0.44[.0]
- * 1.2.45beta01-03 13 10245 12.so.0.45[.0]
- * 1.0.55rc01 10 10055 10.so.0.55[.0]
- * 1.2.45rc01 13 10245 12.so.0.45[.0]
- * 1.0.55 10 10055 10.so.0.55[.0]
- * 1.2.45 13 10245 12.so.0.45[.0]
- * 1.2.46rc01-02 13 10246 12.so.0.46[.0]
- * 1.0.56 10 10056 10.so.0.56[.0]
- * 1.2.46 13 10246 12.so.0.46[.0]
- * 1.2.47beta01 13 10247 12.so.0.47[.0]
- * 1.2.47rc01 13 10247 12.so.0.47[.0]
- * 1.0.57rc01 10 10057 10.so.0.57[.0]
- * 1.2.47 13 10247 12.so.0.47[.0]
- * 1.0.57 10 10057 10.so.0.57[.0]
- * 1.2.48beta01 13 10248 12.so.0.48[.0]
- * 1.2.48rc01-02 13 10248 12.so.0.48[.0]
- * 1.0.58 10 10058 10.so.0.58[.0]
- * 1.2.48 13 10248 12.so.0.48[.0]
- * 1.2.49rc01 13 10249 12.so.0.49[.0]
- * 1.0.59 10 10059 10.so.0.59[.0]
- * 1.2.49 13 10249 12.so.0.49[.0]
- * 1.0.60 10 10060 10.so.0.60[.0]
- * 1.2.50 13 10250 12.so.0.50[.0]
- * 1.2.51beta01-05 13 10251 12.so.0.51[.0]
- * 1.2.51rc01-04 13 10251 12.so.0.51[.0]
- * 1.0.61 10 10061 10.so.0.61[.0]
- * 1.2.51 13 10251 12.so.0.51[.0]
- * 1.2.52beta01 13 10252 12.so.0.52[.0]
- * 1.2.52rc01-02 13 10252 12.so.0.52[.0]
- * 1.0.62 10 10062 10.so.0.62[.0]
- * 1.2.52 13 10252 12.so.0.52[.0]
- *
- * Henceforth the source version will match the shared-library major
- * and minor numbers; the shared-library major version number will be
- * used for changes in backward compatibility, as it is intended. The
- * PNG_LIBPNG_VER macro, which is not used within libpng but is available
- * for applications, is an unsigned integer of the form xyyzz corresponding
- * to the source version x.y.z (leading zeros in y and z). Beta versions
- * were given the previous public release number plus a letter, until
- * version 1.0.6j; from then on they were given the upcoming public
- * release number plus "betaNN" or "rcNN".
- *
- * Binary incompatibility exists only when applications make direct access
- * to the info_ptr or png_ptr members through png.h, and the compiled
- * application is loaded with a different version of the library.
- *
- * DLLNUM will change each time there are forward or backward changes
- * in binary compatibility (e.g., when a new feature is added).
- *
- * See libpng.txt or libpng.3 for more information. The PNG specification
- * is available as a W3C Recommendation and as an ISO Specification,
- * <http://www.w3.org/TR/2003/REC-PNG-20031110/
*/
/*
@@ -323,20 +24,15 @@
*
* This code is released under the libpng license.
*
- * libpng versions 1.2.6, August 15, 2004, through 1.2.52, November 20, 2014, are
- * Copyright (c) 2004, 2006-2013 Glenn Randers-Pehrson, and are
- * distributed according to the same disclaimer and license as libpng-1.2.5
- * with the following individual added to the list of Contributing Authors:
- *
- * Cosmin Truta
- *
- * libpng versions 1.0.7, July 1, 2000, through 1.2.5, October 3, 2002, are
- * Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
- * distributed according to the same disclaimer and license as libpng-1.0.6
- * with the following individuals added to the list of Contributing Authors:
+ * libpng versions 1.0.7, July 1, 2000, through 1.2.54, November 12, 2015, are
+ * Copyright (c) 2000-2002, 2004, 2006-2015 Glenn Randers-Pehrson, are
+ * derived from libpng-1.0.6, and are distributed according to the same
+ * disclaimer and license as libpng-1.0.6 with the following individuals
+ * added to the list of Contributing Authors:
*
* Simon-Pierre Cadieux
* Eric S. Raymond
+ * Cosmin Truta
* Gilles Vollant
*
* and with the following additions to the disclaimer:
@@ -349,18 +45,20 @@
* the user.
*
* libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
- * Copyright (c) 1998, 1999, 2000 Glenn Randers-Pehrson, and are
- * distributed according to the same disclaimer and license as libpng-0.96,
- * with the following individuals added to the list of Contributing Authors:
+ * Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from
+ * libpng-0.96, and are distributed according to the same disclaimer and
+ * license as libpng-0.96, with the following individuals added to the list
+ * of Contributing Authors:
*
* Tom Lane
* Glenn Randers-Pehrson
* Willem van Schaik
*
* libpng versions 0.89, June 1996, through 0.96, May 1997, are
- * Copyright (c) 1996, 1997 Andreas Dilger
- * Distributed according to the same disclaimer and license as libpng-0.88,
- * with the following individuals added to the list of Contributing Authors:
+ * Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88,
+ * and are distributed according to the same disclaimer and license as
+ * libpng-0.88, with the following individuals added to the list of
+ * Contributing Authors:
*
* John Bowler
* Kevin Bracey
@@ -370,7 +68,7 @@
* Tom Tanner
*
* libpng versions 0.5, May 1995, through 0.88, January 1996, are
- * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
+ * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
*
* For the purposes of this copyright and license, "Contributing Authors"
* is defined as the following set of individuals:
@@ -393,34 +91,37 @@
* source code, or portions hereof, for any purpose, without fee, subject
* to the following restrictions:
*
- * 1. The origin of this source code must not be misrepresented.
+ * 1. The origin of this source code must not be misrepresented.
*
- * 2. Altered versions must be plainly marked as such and
- * must not be misrepresented as being the original source.
+ * 2. Altered versions must be plainly marked as such and must not
+ * be misrepresented as being the original source.
*
- * 3. This Copyright notice may not be removed or altered from
- * any source or altered source distribution.
+ * 3. This Copyright notice may not be removed or altered from any
+ * source or altered source distribution.
*
* The Contributing Authors and Group 42, Inc. specifically permit, without
* fee, and encourage the use of this source code as a component to
* supporting the PNG file format in commercial products. If you use this
* source code in a product, acknowledgment is not required but would be
* appreciated.
+ *
+ * END OF COPYRIGHT NOTICE, DISCLAIMER, and LICENSE.
*/
/*
* A "png_get_copyright" function is available, for convenient use in "about"
* boxes and the like:
*
- * printf("%s",png_get_copyright(NULL));
+ * printf("%s", png_get_copyright(NULL));
*
* Also, the PNG logo (in PNG format, of course) is supplied in the
* files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
*/
/*
- * Libpng is OSI Certified Open Source Software. OSI Certified is a
- * certification mark of the Open Source Initiative.
+ * Libpng is OSI Certified Open Source Software. OSI Certified Open Source is
+ * a certification mark of the Open Source Initiative. OSI has not addressed
+ * the additional disclaimers inserted at version 1.0.7.
*/
/*
@@ -431,17 +132,89 @@
* Thanks to Frank J. T. Wojcik for helping with the documentation.
*/
+/* Note about libpng version numbers:
+ *
+ * Due to various miscommunications, unforeseen code incompatibilities
+ * and occasional factors outside the authors' control, version numbering
+ * on the library has not always been consistent and straightforward.
+ * The following table summarizes matters since version 0.89c, which was
+ * the first widely used release:
+ *
+ * source png.h png.h shared-lib
+ * version string int version
+ * ------- ------ ----- ----------
+ * 0.89c "1.0 beta 3" 0.89 89 1.0.89
+ * 0.90 "1.0 beta 4" 0.90 90 0.90 [should have been 2.0.90]
+ * 0.95 "1.0 beta 5" 0.95 95 0.95 [should have been 2.0.95]
+ * 0.96 "1.0 beta 6" 0.96 96 0.96 [should have been 2.0.96]
+ * 0.97b "1.00.97 beta 7" 1.00.97 97 1.0.1 [should have been 2.0.97]
+ * 0.97c 0.97 97 2.0.97
+ * 0.98 0.98 98 2.0.98
+ * 0.99 0.99 98 2.0.99
+ * 0.99a-m 0.99 99 2.0.99
+ * 1.00 1.00 100 2.1.0 [100 should be 10000]
+ * 1.0.0 (from here on, the 100 2.1.0 [100 should be 10000]
+ * 1.0.1 png.h string is 10001 2.1.0
+ * 1.0.1a-e identical to the 10002 from here on, the shared library
+ * 1.0.2 source version) 10002 is 2.V where V is the source code
+ * 1.0.2a-b 10003 version, except as noted.
+ * 1.0.3 10003
+ * 1.0.3a-d 10004
+ * 1.0.4 10004
+ * 1.0.4a-f 10005
+ * 1.0.5 (+ 2 patches) 10005
+ * 1.0.5a-d 10006
+ * 1.0.5e-r 10100 (not source compatible)
+ * 1.0.5s-v 10006 (not binary compatible)
+ * 1.0.6 (+ 3 patches) 10006 (still binary incompatible)
+ * 1.0.6d-f 10007 (still binary incompatible)
+ * 1.0.6g 10007
+ * 1.0.6h 10007 10.6h (testing xy.z so-numbering)
+ * 1.0.6i 10007 10.6i
+ * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0)
+ * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible)
+ * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible)
+ * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible)
+ * 1.0.7 1 10007 (still compatible)
+ * ...
+ * 1.0.19 10 10019 10.so.0.19[.0]
+ * ...
+ * 1.0.64 10 10064 10.so.0.64[.0]
+ * 1.2.54 13 10254 12.so.0.54[.0]
+ *
+ * Henceforth the source version will match the shared-library major
+ * and minor numbers; the shared-library major version number will be
+ * used for changes in backward compatibility, as it is intended. The
+ * PNG_LIBPNG_VER macro, which is not used within libpng but is available
+ * for applications, is an unsigned integer of the form xyyzz corresponding
+ * to the source version x.y.z (leading zeros in y and z). Beta versions
+ * were given the previous public release number plus a letter, until
+ * version 1.0.6j; from then on they were given the upcoming public
+ * release number plus "betaNN" or "rcNN".
+ *
+ * Binary incompatibility exists only when applications make direct access
+ * to the info_ptr or png_ptr members through png.h, and the compiled
+ * application is loaded with a different version of the library.
+ *
+ * DLLNUM will change each time there are forward or backward changes
+ * in binary compatibility (e.g., when a new feature is added).
+ *
+ * See libpng.txt or libpng.3 for more information. The PNG specification
+ * is available as a W3C Recommendation and as an ISO Specification,
+ * <http://www.w3.org/TR/2003/REC-PNG-20031110/
+ */
+
/*
* Y2K compliance in libpng:
* =========================
*
- * November 20, 2014
+ * November 12, 2015
*
* Since the PNG Development group is an ad-hoc body, we can't make
* an official declaration.
*
* This is your unofficial assurance that libpng from version 0.71 and
- * upward through 1.2.52 are Y2K compliant. It is my belief that earlier
+ * upward through 1.2.54 are Y2K compliant. It is my belief that earlier
* versions were also Y2K compliant.
*
* Libpng only has three year fields. One is a 2-byte unsigned integer
@@ -497,9 +270,9 @@
*/
/* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.2.52"
+#define PNG_LIBPNG_VER_STRING "1.2.54"
#define PNG_HEADER_VERSION_STRING \
- " libpng version 1.2.52 - November 20, 2014\n"
+ " libpng version 1.2.54 - November 12, 2015\n"
#define PNG_LIBPNG_VER_SONUM 0
#define PNG_LIBPNG_VER_DLLNUM 13
@@ -507,7 +280,7 @@
/* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
#define PNG_LIBPNG_VER_MAJOR 1
#define PNG_LIBPNG_VER_MINOR 2
-#define PNG_LIBPNG_VER_RELEASE 52
+#define PNG_LIBPNG_VER_RELEASE 54
/* This should match the numeric part of the final component of
* PNG_LIBPNG_VER_STRING, omitting any leading zero:
*/
@@ -537,7 +310,7 @@
* version 1.0.0 was mis-numbered 100 instead of 10000). From
* version 1.0.1 it's xxyyzz, where x=major, y=minor, z=release
*/
-#define PNG_LIBPNG_VER 10252 /* 1.2.52 */
+#define PNG_LIBPNG_VER 10254 /* 1.2.54 */
#ifndef PNG_VERSION_INFO_ONLY
/* Include the compression library's header */
@@ -1453,16 +1226,6 @@ struct png_struct_def
png_uint_16p hist PNG_DEPSTRUCT; /* histogram */
#endif
-#ifdef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
- png_byte heuristic_method PNG_DEPSTRUCT; /* heuristic for row filter selection */
- png_byte num_prev_filters PNG_DEPSTRUCT; /* number of weights for previous rows */
- png_bytep prev_filters PNG_DEPSTRUCT; /* filter type(s) of previous row(s) */
- png_uint_16p filter_weights PNG_DEPSTRUCT; /* weight(s) for previous line(s) */
- png_uint_16p inv_filter_weights PNG_DEPSTRUCT; /* 1/weight(s) for previous line(s) */
- png_uint_16p filter_costs PNG_DEPSTRUCT; /* relative filter calculation cost */
- png_uint_16p inv_filter_costs PNG_DEPSTRUCT; /* 1/relative filter calculation cost */
-#endif
-
#ifdef PNG_TIME_RFC1123_SUPPORTED
png_charp time_buffer PNG_DEPSTRUCT; /* String to hold RFC 1123 time text */
#endif
@@ -1577,7 +1340,7 @@ struct png_struct_def
/* This triggers a compiler error in png.c, if png.c and png.h
* do not agree upon the version number.
*/
-typedef png_structp version_1_2_52;
+typedef png_structp version_1_2_54;
typedef png_struct FAR * FAR * png_structpp;
@@ -1978,35 +1741,7 @@ extern PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method,
#define PNG_FILTER_VALUE_PAETH 4
#define PNG_FILTER_VALUE_LAST 5
-#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) /* EXPERIMENTAL */
-/* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_
- * defines, either the default (minimum-sum-of-absolute-differences), or
- * the experimental method (weighted-minimum-sum-of-absolute-differences).
- *
- * Weights are factors >= 1.0, indicating how important it is to keep the
- * filter type consistent between rows. Larger numbers mean the current
- * filter is that many times as likely to be the same as the "num_weights"
- * previous filters. This is cumulative for each previous row with a weight.
- * There needs to be "num_weights" values in "filter_weights", or it can be
- * NULL if the weights aren't being specified. Weights have no influence on
- * the selection of the first row filter. Well chosen weights can (in theory)
- * improve the compression for a given image.
- *
- * Costs are factors >= 1.0 indicating the relative decoding costs of a
- * filter type. Higher costs indicate more decoding expense, and are
- * therefore less likely to be selected over a filter with lower computational
- * costs. There needs to be a value in "filter_costs" for each valid filter
- * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't
- * setting the costs. Costs try to improve the speed of decompression without
- * unduly increasing the compressed image size.
- *
- * A negative weight or cost indicates the default value is to be used, and
- * values in the range [0.0, 1.0) indicate the value is to remain unchanged.
- * The default values for both weights and costs are currently 1.0, but may
- * change if good general weighting/cost heuristics can be found. If both
- * the weights and costs are set to 1.0, this degenerates the WEIGHTED method
- * to the UNWEIGHTED method, but with added encoding time/computation.
- */
+#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) /* DEPRECATED */
#ifdef PNG_FLOATING_POINT_SUPPORTED
extern PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr,
int heuristic_method, int num_weights, png_doublep filter_weights,
@@ -2014,9 +1749,7 @@ extern PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr,
#endif
#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
-/* Heuristic used for row filter selection. These defines should NOT be
- * changed.
- */
+/* The following are no longer used and will be removed from libpng-1.7: */
#define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */
#define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */
#define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */

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