diff options
| author | Alon Zakai <alonzakai@gmail.com> | 2011-10-07 16:42:54 -0700 |
|---|---|---|
| committer | Alon Zakai <alonzakai@gmail.com> | 2011-10-07 16:42:54 -0700 |
| commit | 09c67774af1379b51a1ac802a25c07f00a45cf0f (patch) | |
| tree | 4fa4ee114d112d3d089cce529c65ed7a9e269b87 | |
| parent | 43760d313e63c074173e0fbcd841f96cc73ec638 (diff) | |
fix openjpeg
| -rw-r--r-- | system/include/gfx/png.h | 3798 | ||||
| -rw-r--r-- | system/include/gfx/pngconf.h | 1665 | ||||
| -rw-r--r-- | system/include/libc/getopt.h | 6 | ||||
| -rw-r--r-- | system/include/libc/machine/setjmp.h | 5 | ||||
| -rw-r--r-- | system/include/zconf.h | 428 | ||||
| -rw-r--r-- | system/include/zlib.h | 1613 | ||||
| -rw-r--r-- | tools/shared.py | 1 |
7 files changed, 7516 insertions, 0 deletions
diff --git a/system/include/gfx/png.h b/system/include/gfx/png.h new file mode 100644 index 00000000..8131940f --- /dev/null +++ b/system/include/gfx/png.h @@ -0,0 +1,3798 @@ +/* png.h - header file for PNG reference library + * + * libpng version 1.2.46 - July 9, 2011 + * Copyright (c) 1998-2011 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.) + * + * This code is released under the libpng license (See LICENSE, below) + * + * 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 1.2.46 - July 9, 2011: 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] + * + * 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/ + */ + +/* + * COPYRIGHT NOTICE, DISCLAIMER, and LICENSE: + * + * If you modify libpng you may insert additional notices immediately following + * this sentence. + * + * This code is released under the libpng license. + * + * libpng versions 1.2.6, August 15, 2004, through 1.2.46, July 9, 2011, are + * Copyright (c) 2004, 2006-2011 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: + * + * Simon-Pierre Cadieux + * Eric S. Raymond + * Gilles Vollant + * + * and with the following additions to the disclaimer: + * + * There is no warranty against interference with your enjoyment of the + * library or against infringement. There is no warranty that our + * efforts or the library will fulfill any of your particular purposes + * or needs. This library is provided with all faults, and the entire + * risk of satisfactory quality, performance, accuracy, and effort is with + * 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: + * + * 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: + * + * John Bowler + * Kevin Bracey + * Sam Bushell + * Magnus Holmgren + * Greg Roelofs + * Tom Tanner + * + * libpng versions 0.5, May 1995, through 0.88, January 1996, are + * 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: + * + * Andreas Dilger + * Dave Martindale + * Guy Eric Schalnat + * Paul Schmidt + * Tim Wegner + * + * The PNG Reference Library is supplied "AS IS". The Contributing Authors + * and Group 42, Inc. disclaim all warranties, expressed or implied, + * including, without limitation, the warranties of merchantability and of + * fitness for any purpose. The Contributing Authors and Group 42, Inc. + * assume no liability for direct, indirect, incidental, special, exemplary, + * or consequential damages, which may result from the use of the PNG + * Reference Library, even if advised of the possibility of such damage. + * + * Permission is hereby granted to use, copy, modify, and distribute this + * 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. + * + * 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. + * + * 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. + */ + +/* + * A "png_get_copyright" function is available, for convenient use in "about" + * boxes and the like: + * + * 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. + */ + +/* + * The contributing authors would like to thank all those who helped + * with testing, bug fixes, and patience. This wouldn't have been + * possible without all of you. + * + * Thanks to Frank J. T. Wojcik for helping with the documentation. + */ + +/* + * Y2K compliance in libpng: + * ========================= + * + * July 9, 2011 + * + * 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 1.2.46 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 + * that will hold years up to 65535. The other two hold the date in text + * format, and will hold years up to 9999. + * + * The integer is + * "png_uint_16 year" in png_time_struct. + * + * The strings are + * "png_charp time_buffer" in png_struct and + * "near_time_buffer", which is a local character string in png.c. + * + * There are seven time-related functions: + * png.c: png_convert_to_rfc_1123() in png.c + * (formerly png_convert_to_rfc_1152() in error) + * png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c + * png_convert_from_time_t() in pngwrite.c + * png_get_tIME() in pngget.c + * png_handle_tIME() in pngrutil.c, called in pngread.c + * png_set_tIME() in pngset.c + * png_write_tIME() in pngwutil.c, called in pngwrite.c + * + * All handle dates properly in a Y2K environment. The + * png_convert_from_time_t() function calls gmtime() to convert from system + * clock time, which returns (year - 1900), which we properly convert to + * the full 4-digit year. There is a possibility that applications using + * libpng are not passing 4-digit years into the png_convert_to_rfc_1123() + * function, or that they are incorrectly passing only a 2-digit year + * instead of "year - 1900" into the png_convert_from_struct_tm() function, + * but this is not under our control. The libpng documentation has always + * stated that it works with 4-digit years, and the APIs have been + * documented as such. + * + * The tIME chunk itself is also Y2K compliant. It uses a 2-byte unsigned + * integer to hold the year, and can hold years as large as 65535. + * + * zlib, upon which libpng depends, is also Y2K compliant. It contains + * no date-related code. + * + * Glenn Randers-Pehrson + * libpng maintainer + * PNG Development Group + */ + +#ifndef PNG_H +#define PNG_H + +/* This is not the place to learn how to use libpng. The file libpng.txt + * describes how to use libpng, and the file example.c summarizes it + * with some code on which to build. This file is useful for looking + * at the actual function definitions and structure components. + */ + +/* Version information for png.h - this should match the version in png.c */ +#define PNG_LIBPNG_VER_STRING "1.2.46" +#define PNG_HEADER_VERSION_STRING \ + " libpng version 1.2.46 - July 9, 2011\n" + +#define PNG_LIBPNG_VER_SONUM 0 +#define PNG_LIBPNG_VER_DLLNUM 13 + +/* 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 46 +/* This should match the numeric part of the final component of + * PNG_LIBPNG_VER_STRING, omitting any leading zero: + */ + +#define PNG_LIBPNG_VER_BUILD 0 + +/* Release Status */ +#define PNG_LIBPNG_BUILD_ALPHA 1 +#define PNG_LIBPNG_BUILD_BETA 2 +#define PNG_LIBPNG_BUILD_RC 3 +#define PNG_LIBPNG_BUILD_STABLE 4 +#define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7 + +/* Release-Specific Flags */ +#define PNG_LIBPNG_BUILD_PATCH 8 /* Can be OR'ed with + PNG_LIBPNG_BUILD_STABLE only */ +#define PNG_LIBPNG_BUILD_PRIVATE 16 /* Cannot be OR'ed with + PNG_LIBPNG_BUILD_SPECIAL */ +#define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with + PNG_LIBPNG_BUILD_PRIVATE */ + +#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE + +/* Careful here. At one time, Guy wanted to use 082, but that would be octal. + * We must not include leading zeros. + * Versions 0.7 through 1.0.0 were in the range 0 to 100 here (only + * 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 10246 /* 1.2.46 */ + +#ifndef PNG_VERSION_INFO_ONLY +/* Include the compression library's header */ +#include "zlib.h" +#endif + +/* Include all user configurable info, including optional assembler routines */ +#include "pngconf.h" + +/* + * Added at libpng-1.2.8 */ +/* Ref MSDN: Private as priority over Special + * VS_FF_PRIVATEBUILD File *was not* built using standard release + * procedures. If this value is given, the StringFileInfo block must + * contain a PrivateBuild string. + * + * VS_FF_SPECIALBUILD File *was* built by the original company using + * standard release procedures but is a variation of the standard + * file of the same version number. If this value is given, the + * StringFileInfo block must contain a SpecialBuild string. + */ + +#ifdef PNG_USER_PRIVATEBUILD +# define PNG_LIBPNG_BUILD_TYPE \ + (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE) +#else +# ifdef PNG_LIBPNG_SPECIALBUILD +# define PNG_LIBPNG_BUILD_TYPE \ + (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL) +# else +# define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE) +# endif +#endif + +#ifndef PNG_VERSION_INFO_ONLY + +/* Inhibit C++ name-mangling for libpng functions but not for system calls. */ +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +/* This file is arranged in several sections. The first section contains + * structure and type definitions. The second section contains the external + * library functions, while the third has the internal library functions, + * which applications aren't expected to use directly. + */ + +#ifndef PNG_NO_TYPECAST_NULL +#define int_p_NULL (int *)NULL +#define png_bytep_NULL (png_bytep)NULL +#define png_bytepp_NULL (png_bytepp)NULL +#define png_doublep_NULL (png_doublep)NULL +#define png_error_ptr_NULL (png_error_ptr)NULL +#define png_flush_ptr_NULL (png_flush_ptr)NULL +#define png_free_ptr_NULL (png_free_ptr)NULL +#define png_infopp_NULL (png_infopp)NULL +#define png_malloc_ptr_NULL (png_malloc_ptr)NULL +#define png_read_status_ptr_NULL (png_read_status_ptr)NULL +#define png_rw_ptr_NULL (png_rw_ptr)NULL +#define png_structp_NULL (png_structp)NULL +#define png_uint_16p_NULL (png_uint_16p)NULL +#define png_voidp_NULL (png_voidp)NULL +#define png_write_status_ptr_NULL (png_write_status_ptr)NULL +#else +#define int_p_NULL NULL +#define png_bytep_NULL NULL +#define png_bytepp_NULL NULL +#define png_doublep_NULL NULL +#define png_error_ptr_NULL NULL +#define png_flush_ptr_NULL NULL +#define png_free_ptr_NULL NULL +#define png_infopp_NULL NULL +#define png_malloc_ptr_NULL NULL +#define png_read_status_ptr_NULL NULL +#define png_rw_ptr_NULL NULL +#define png_structp_NULL NULL +#define png_uint_16p_NULL NULL +#define png_voidp_NULL NULL +#define png_write_status_ptr_NULL NULL +#endif + +/* Variables declared in png.c - only it needs to define PNG_NO_EXTERN */ +#if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN) +/* Version information for C files, stored in png.c. This had better match + * the version above. + */ +#ifdef PNG_USE_GLOBAL_ARRAYS +PNG_EXPORT_VAR (PNG_CONST char) png_libpng_ver[18]; + /* Need room for 99.99.99beta99z */ +#else +#define png_libpng_ver png_get_header_ver(NULL) +#endif + +#ifdef PNG_USE_GLOBAL_ARRAYS +/* This was removed in version 1.0.5c */ +/* Structures to facilitate easy interlacing. See png.c for more details */ +PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_start[7]; +PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_inc[7]; +PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_ystart[7]; +PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_yinc[7]; +PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_mask[7]; +PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_dsp_mask[7]; +/* This isn't currently used. If you need it, see png.c for more details. +PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_height[7]; +*/ +#endif + +#endif /* PNG_NO_EXTERN */ + +/* Three color definitions. The order of the red, green, and blue, (and the + * exact size) is not important, although the size of the fields need to + * be png_byte or png_uint_16 (as defined below). + */ +typedef struct png_color_struct +{ + png_byte red; + png_byte green; + png_byte blue; +} png_color; +typedef png_color FAR * png_colorp; +typedef png_color FAR * FAR * png_colorpp; + +typedef struct png_color_16_struct +{ + png_byte index; /* used for palette files */ + png_uint_16 red; /* for use in red green blue files */ + png_uint_16 green; + png_uint_16 blue; + png_uint_16 gray; /* for use in grayscale files */ +} png_color_16; +typedef png_color_16 FAR * png_color_16p; +typedef png_color_16 FAR * FAR * png_color_16pp; + +typedef struct png_color_8_struct +{ + png_byte red; /* for use in red green blue files */ + png_byte green; + png_byte blue; + png_byte gray; /* for use in grayscale files */ + png_byte alpha; /* for alpha channel files */ +} png_color_8; +typedef png_color_8 FAR * png_color_8p; +typedef png_color_8 FAR * FAR * png_color_8pp; + +/* + * The following two structures are used for the in-core representation + * of sPLT chunks. + */ +typedef struct png_sPLT_entry_struct +{ + png_uint_16 red; + png_uint_16 green; + png_uint_16 blue; + png_uint_16 alpha; + png_uint_16 frequency; +} png_sPLT_entry; +typedef png_sPLT_entry FAR * png_sPLT_entryp; +typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp; + +/* When the depth of the sPLT palette is 8 bits, the color and alpha samples + * occupy the LSB of their respective members, and the MSB of each member + * is zero-filled. The frequency member always occupies the full 16 bits. + */ + +typedef struct png_sPLT_struct +{ + png_charp name; /* palette name */ + png_byte depth; /* depth of palette samples */ + png_sPLT_entryp entries; /* palette entries */ + png_int_32 nentries; /* number of palette entries */ +} png_sPLT_t; +typedef png_sPLT_t FAR * png_sPLT_tp; +typedef png_sPLT_t FAR * FAR * png_sPLT_tpp; + +#ifdef PNG_TEXT_SUPPORTED +/* png_text holds the contents of a text/ztxt/itxt chunk in a PNG file, + * and whether that contents is compressed or not. The "key" field + * points to a regular zero-terminated C string. The "text", "lang", and + * "lang_key" fields can be regular C strings, empty strings, or NULL pointers. + * However, the * structure returned by png_get_text() will always contain + * regular zero-terminated C strings (possibly empty), never NULL pointers, + * so they can be safely used in printf() and other string-handling functions. + */ +typedef struct png_text_struct +{ + int compression; /* compression value: + -1: tEXt, none + 0: zTXt, deflate + 1: iTXt, none + 2: iTXt, deflate */ + png_charp key; /* keyword, 1-79 character description of "text" */ + png_charp text; /* comment, may be an empty string (ie "") + or a NULL pointer */ + png_size_t text_length; /* length of the text string */ +#ifdef PNG_iTXt_SUPPORTED + png_size_t itxt_length; /* length of the itxt string */ + png_charp lang; /* language code, 0-79 characters + or a NULL pointer */ + png_charp lang_key; /* keyword translated UTF-8 string, 0 or more + chars or a NULL pointer */ +#endif +} png_text; +typedef png_text FAR * png_textp; +typedef png_text FAR * FAR * png_textpp; +#endif + +/* Supported compression types for text in PNG files (tEXt, and zTXt). + * The values of the PNG_TEXT_COMPRESSION_ defines should NOT be changed. + */ +#define PNG_TEXT_COMPRESSION_NONE_WR -3 +#define PNG_TEXT_COMPRESSION_zTXt_WR -2 +#define PNG_TEXT_COMPRESSION_NONE -1 +#define PNG_TEXT_COMPRESSION_zTXt 0 +#define PNG_ITXT_COMPRESSION_NONE 1 +#define PNG_ITXT_COMPRESSION_zTXt 2 +#define PNG_TEXT_COMPRESSION_LAST 3 /* Not a valid value */ + +/* png_time is a way to hold the time in an machine independent way. + * Two conversions are provided, both from time_t and struct tm. There + * is no portable way to convert to either of these structures, as far + * as I know. If you know of a portable way, send it to me. As a side + * note - PNG has always been Year 2000 compliant! + */ +typedef struct png_time_struct +{ + png_uint_16 year; /* full year, as in, 1995 */ + png_byte month; /* month of year, 1 - 12 */ + png_byte day; /* day of month, 1 - 31 */ + png_byte hour; /* hour of day, 0 - 23 */ + png_byte minute; /* minute of hour, 0 - 59 */ + png_byte second; /* second of minute, 0 - 60 (for leap seconds) */ +} png_time; +typedef png_time FAR * png_timep; +typedef png_time FAR * FAR * png_timepp; + +#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ + defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) +/* png_unknown_chunk is a structure to hold queued chunks for which there is + * no specific support. The idea is that we can use this to queue + * up private chunks for output even though the library doesn't actually + * know about their semantics. + */ +#define PNG_CHUNK_NAME_LENGTH 5 +typedef struct png_unknown_chunk_t +{ + png_byte name[PNG_CHUNK_NAME_LENGTH]; + png_byte *data; + png_size_t size; + + /* libpng-using applications should NOT directly modify this byte. */ + png_byte location; /* mode of operation at read time */ +} +png_unknown_chunk; +typedef png_unknown_chunk FAR * png_unknown_chunkp; +typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp; +#endif + +/* png_info is a structure that holds the information in a PNG file so + * that the application can find out the characteristics of the image. + * If you are reading the file, this structure will tell you what is + * in the PNG file. If you are writing the file, fill in the information + * you want to put into the PNG file, then call png_write_info(). + * The names chosen should be very close to the PNG specification, so + * consult that document for information about the meaning of each field. + * + * With libpng < 0.95, it was only possible to directly set and read the + * the values in the png_info_struct, which meant that the contents and + * order of the values had to remain fixed. With libpng 0.95 and later, + * however, there are now functions that abstract the contents of + * png_info_struct from the application, so this makes it easier to use + * libpng with dynamic libraries, and even makes it possible to use + * libraries that don't have all of the libpng ancillary chunk-handing + * functionality. + * + * In any case, the order of the parameters in png_info_struct should NOT + * be changed for as long as possible to keep compatibility with applications + * that use the old direct-access method with png_info_struct. + * + * The following members may have allocated storage attached that should be + * cleaned up before the structure is discarded: palette, trans, text, + * pcal_purpose, pcal_units, pcal_params, hist, iccp_name, iccp_profile, + * splt_palettes, scal_unit, row_pointers, and unknowns. By default, these + * are automatically freed when the info structure is deallocated, if they were + * allocated internally by libpng. This behavior can be changed by means + * of the png_data_freer() function. + * + * More allocation details: all the chunk-reading functions that + * change these members go through the corresponding png_set_* + * functions. A function to clear these members is available: see + * png_free_data(). The png_set_* functions do not depend on being + * able to point info structure members to any of the storage they are + * passed (they make their own copies), EXCEPT that the png_set_text + * functions use the same storage passed to them in the text_ptr or + * itxt_ptr structure argument, and the png_set_rows and png_set_unknowns + * functions do not make their own copies. + */ +typedef struct png_info_struct +{ + /* The following are necessary for every PNG file */ + png_uint_32 width PNG_DEPSTRUCT; /* width of image in pixels (from IHDR) */ + png_uint_32 height PNG_DEPSTRUCT; /* height of image in pixels (from IHDR) */ + png_uint_32 valid PNG_DEPSTRUCT; /* valid chunk data (see PNG_INFO_ below) */ + png_uint_32 rowbytes PNG_DEPSTRUCT; /* bytes needed to hold an untransformed row */ + png_colorp palette PNG_DEPSTRUCT; /* array of color values (valid & PNG_INFO_PLTE) */ + png_uint_16 num_palette PNG_DEPSTRUCT; /* number of color entries in "palette" (PLTE) */ + png_uint_16 num_trans PNG_DEPSTRUCT; /* number of transparent palette color (tRNS) */ + png_byte bit_depth PNG_DEPSTRUCT; /* 1, 2, 4, 8, or 16 bits/channel (from IHDR) */ + png_byte color_type PNG_DEPSTRUCT; /* see PNG_COLOR_TYPE_ below (from IHDR) */ + /* The following three should have been named *_method not *_type */ + png_byte compression_type PNG_DEPSTRUCT; /* must be PNG_COMPRESSION_TYPE_BASE (IHDR) */ + png_byte filter_type PNG_DEPSTRUCT; /* must be PNG_FILTER_TYPE_BASE (from IHDR) */ + png_byte interlace_type PNG_DEPSTRUCT; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ + + /* The following is informational only on read, and not used on writes. */ + png_byte channels PNG_DEPSTRUCT; /* number of data channels per pixel (1, 2, 3, 4) */ + png_byte pixel_depth PNG_DEPSTRUCT; /* number of bits per pixel */ + png_byte spare_byte PNG_DEPSTRUCT; /* to align the data, and for future use */ + png_byte signature[8] PNG_DEPSTRUCT; /* magic bytes read by libpng from start of file */ + + /* The rest of the data is optional. If you are reading, check the + * valid field to see if the information in these are valid. If you + * are writing, set the valid field to those chunks you want written, + * and initialize the appropriate fields below. + */ + +#if defined(PNG_gAMA_SUPPORTED) && defined(PNG_FLOATING_POINT_SUPPORTED) + /* The gAMA chunk describes the gamma characteristics of the system + * on which the image was created, normally in the range [1.0, 2.5]. + * Data is valid if (valid & PNG_INFO_gAMA) is non-zero. + */ + float gamma PNG_DEPSTRUCT; /* gamma value of image, if (valid & PNG_INFO_gAMA) */ +#endif + +#ifdef PNG_sRGB_SUPPORTED + /* GR-P, 0.96a */ + /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */ + png_byte srgb_intent PNG_DEPSTRUCT; /* sRGB rendering intent [0, 1, 2, or 3] */ +#endif + +#ifdef PNG_TEXT_SUPPORTED + /* The tEXt, and zTXt chunks contain human-readable textual data in + * uncompressed, compressed, and optionally compressed forms, respectively. + * The data in "text" is an array of pointers to uncompressed, + * null-terminated C strings. Each chunk has a keyword that describes the + * textual data contained in that chunk. Keywords are not required to be + * unique, and the text string may be empty. Any number of text chunks may + * be in an image. + */ + int num_text PNG_DEPSTRUCT; /* number of comments read/to write */ + int max_text PNG_DEPSTRUCT; /* current size of text array */ + png_textp text PNG_DEPSTRUCT; /* array of comments read/to write */ +#endif /* PNG_TEXT_SUPPORTED */ + +#ifdef PNG_tIME_SUPPORTED + /* The tIME chunk holds the last time the displayed image data was + * modified. See the png_time struct for the contents of this struct. + */ + png_time mod_time PNG_DEPSTRUCT; +#endif + +#ifdef PNG_sBIT_SUPPORTED + /* The sBIT chunk specifies the number of significant high-order bits + * in the pixel data. Values are in the range [1, bit_depth], and are + * only specified for the channels in the pixel data. The contents of + * the low-order bits is not specified. Data is valid if + * (valid & PNG_INFO_sBIT) is non-zero. + */ + png_color_8 sig_bit PNG_DEPSTRUCT; /* significant bits in color channels */ +#endif + +#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \ +defined(PNG_READ_BACKGROUND_SUPPORTED) + /* The tRNS chunk supplies transparency data for paletted images and + * other image types that don't need a full alpha channel. There are + * "num_trans" transparency values for a paletted image, stored in the + * same order as the palette colors, starting from index 0. Values + * for the data are in the range [0, 255], ranging from fully transparent + * to fully opaque, respectively. For non-paletted images, there is a + * single color specified that should be treated as fully transparent. + * Data is valid if (valid & PNG_INFO_tRNS) is non-zero. + */ + png_bytep trans PNG_DEPSTRUCT; /* transparent values for paletted image */ + png_color_16 trans_values PNG_DEPSTRUCT; /* transparent color for non-palette image */ +#endif + +#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) + /* The bKGD chunk gives the suggested image background color if the + * display program does not have its own background color and the image + * is needs to composited onto a background before display. The colors + * in "background" are normally in the same color space/depth as the + * pixel data. Data is valid if (valid & PNG_INFO_bKGD) is non-zero. + */ + png_color_16 background PNG_DEPSTRUCT; +#endif + +#ifdef PNG_oFFs_SUPPORTED + /* The oFFs chunk gives the offset in "offset_unit_type" units rightwards + * and downwards from the top-left corner of the display, page, or other + * application-specific co-ordinate space. See the PNG_OFFSET_ defines + * below for the unit types. Valid if (valid & PNG_INFO_oFFs) non-zero. + */ + png_int_32 x_offset PNG_DEPSTRUCT; /* x offset on page */ + png_int_32 y_offset PNG_DEPSTRUCT; /* y offset on page */ + png_byte offset_unit_type PNG_DEPSTRUCT; /* offset units type */ +#endif + +#ifdef PNG_pHYs_SUPPORTED + /* The pHYs chunk gives the physical pixel density of the image for + * display or printing in "phys_unit_type" units (see PNG_RESOLUTION_ + * defines below). Data is valid if (valid & PNG_INFO_pHYs) is non-zero. + */ + png_uint_32 x_pixels_per_unit PNG_DEPSTRUCT; /* horizontal pixel density */ + png_uint_32 y_pixels_per_unit PNG_DEPSTRUCT; /* vertical pixel density */ + png_byte phys_unit_type PNG_DEPSTRUCT; /* resolution type (see PNG_RESOLUTION_ below) */ +#endif + +#ifdef PNG_hIST_SUPPORTED + /* The hIST chunk contains the relative frequency or importance of the + * various palette entries, so that a viewer can intelligently select a + * reduced-color palette, if required. Data is an array of "num_palette" + * values in the range [0,65535]. Data valid if (valid & PNG_INFO_hIST) + * is non-zero. + */ + png_uint_16p hist PNG_DEPSTRUCT; +#endif + +#ifdef PNG_cHRM_SUPPORTED + /* The cHRM chunk describes the CIE color characteristics of the monitor + * on which the PNG was created. This data allows the viewer to do gamut + * mapping of the input image to ensure that the viewer sees the same + * colors in the image as the creator. Values are in the range + * [0.0, 0.8]. Data valid if (valid & PNG_INFO_cHRM) non-zero. + */ +#ifdef PNG_FLOATING_POINT_SUPPORTED + float x_white PNG_DEPSTRUCT; + float y_white PNG_DEPSTRUCT; + float x_red PNG_DEPSTRUCT; + float y_red PNG_DEPSTRUCT; + float x_green PNG_DEPSTRUCT; + float y_green PNG_DEPSTRUCT; + float x_blue PNG_DEPSTRUCT; + float y_blue PNG_DEPSTRUCT; +#endif +#endif + +#ifdef PNG_pCAL_SUPPORTED + /* The pCAL chunk describes a transformation between the stored pixel + * values and original physical data values used to create the image. + * The integer range [0, 2^bit_depth - 1] maps to the floating-point + * range given by [pcal_X0, pcal_X1], and are further transformed by a + * (possibly non-linear) transformation function given by "pcal_type" + * and "pcal_params" into "pcal_units". Please see the PNG_EQUATION_ + * defines below, and the PNG-Group's PNG extensions document for a + * complete description of the transformations and how they should be + * implemented, and for a description of the ASCII parameter strings. + * Data values are valid if (valid & PNG_INFO_pCAL) non-zero. + */ + png_charp pcal_purpose PNG_DEPSTRUCT; /* pCAL chunk description string */ + png_int_32 pcal_X0 PNG_DEPSTRUCT; /* minimum value */ + png_int_32 pcal_X1 PNG_DEPSTRUCT; /* maximum value */ + png_charp pcal_units PNG_DEPSTRUCT; /* Latin-1 string giving physical units */ + png_charpp pcal_params PNG_DEPSTRUCT; /* ASCII strings containing parameter values */ + png_byte pcal_type PNG_DEPSTRUCT; /* equation type (see PNG_EQUATION_ below) */ + png_byte pcal_nparams PNG_DEPSTRUCT; /* number of parameters given in pcal_params */ +#endif + +/* New members added in libpng-1.0.6 */ +#ifdef PNG_FREE_ME_SUPPORTED + png_uint_32 free_me PNG_DEPSTRUCT; /* flags items libpng is responsible for freeing */ +#endif + +#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \ + defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) + /* Storage for unknown chunks that the library doesn't recognize. */ + png_unknown_chunkp unknown_chunks PNG_DEPSTRUCT; + png_size_t unknown_chunks_num PNG_DEPSTRUCT; +#endif + +#ifdef PNG_iCCP_SUPPORTED + /* iCCP chunk data. */ + png_charp iccp_name PNG_DEPSTRUCT; /* profile name */ + png_charp iccp_profile PNG_DEPSTRUCT; /* International Color Consortium profile data */ + /* Note to maintainer: should be png_bytep */ + png_uint_32 iccp_proflen PNG_DEPSTRUCT; /* ICC profile data length */ + png_byte iccp_compression PNG_DEPSTRUCT; /* Always zero */ +#endif + +#ifdef PNG_sPLT_SUPPORTED + /* Data on sPLT chunks (there may be more than one). */ + png_sPLT_tp splt_palettes PNG_DEPSTRUCT; + png_uint_32 splt_palettes_num PNG_DEPSTRUCT; +#endif + +#ifdef PNG_sCAL_SUPPORTED + /* The sCAL chunk describes the actual physical dimensions of the + * subject matter of the graphic. The chunk contains a unit specification + * a byte value, and two ASCII strings representing floating-point + * values. The values are width and height corresponsing to one pixel + * in the image. This external representation is converted to double + * here. Data values are valid if (valid & PNG_INFO_sCAL) is non-zero. + */ + png_byte scal_unit PNG_DEPSTRUCT; /* unit of physical scale */ +#ifdef PNG_FLOATING_POINT_SUPPORTED + double scal_pixel_width PNG_DEPSTRUCT; /* width of one pixel */ + double scal_pixel_height PNG_DEPSTRUCT; /* height of one pixel */ +#endif +#ifdef PNG_FIXED_POINT_SUPPORTED + png_charp scal_s_width PNG_DEPSTRUCT; /* string containing height */ + png_charp scal_s_height PNG_DEPSTRUCT; /* string containing width */ +#endif +#endif + +#ifdef PNG_INFO_IMAGE_SUPPORTED + /* Memory has been allocated if (valid & PNG_ALLOCATED_INFO_ROWS) non-zero */ + /* Data valid if (valid & PNG_INFO_IDAT) non-zero */ + png_bytepp row_pointers PNG_DEPSTRUCT; /* the image bits */ +#endif + +#if defined(PNG_FIXED_POINT_SUPPORTED) && defined(PNG_gAMA_SUPPORTED) + png_fixed_point int_gamma PNG_DEPSTRUCT; /* gamma of image, if (valid & PNG_INFO_gAMA) */ +#endif + +#if defined(PNG_cHRM_SUPPORTED) && defined(PNG_FIXED_POINT_SUPPORTED) + png_fixed_point int_x_white PNG_DEPSTRUCT; + png_fixed_point int_y_white PNG_DEPSTRUCT; + png_fixed_point int_x_red PNG_DEPSTRUCT; + png_fixed_point int_y_red PNG_DEPSTRUCT; + png_fixed_point int_x_green PNG_DEPSTRUCT; + png_fixed_point int_y_green PNG_DEPSTRUCT; + png_fixed_point int_x_blue PNG_DEPSTRUCT; + png_fixed_point int_y_blue PNG_DEPSTRUCT; +#endif + +} png_info; + +typedef png_info FAR * png_infop; +typedef png_info FAR * FAR * png_infopp; + +/* Maximum positive integer used in PNG is (2^31)-1 */ +#define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL) +#define PNG_UINT_32_MAX ((png_uint_32)(-1)) +#define PNG_SIZE_MAX ((png_size_t)(-1)) +#if defined(PNG_1_0_X) || defined (PNG_1_2_X) +/* PNG_MAX_UINT is deprecated; use PNG_UINT_31_MAX instead. */ +#define PNG_MAX_UINT PNG_UINT_31_MAX +#endif + +/* These describe the color_type field in png_info. */ +/* color type masks */ +#define PNG_COLOR_MASK_PALETTE 1 +#define PNG_COLOR_MASK_COLOR 2 +#define PNG_COLOR_MASK_ALPHA 4 + +/* color types. Note that not all combinations are legal */ +#define PNG_COLOR_TYPE_GRAY 0 +#define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE) +#define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR) +#define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA) +#define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA) +/* aliases */ +#define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA +#define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA + +/* This is for compression type. PNG 1.0-1.2 only define the single type. */ +#define PNG_COMPRESSION_TYPE_BASE 0 /* Deflate method 8, 32K window */ +#define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE + +/* This is for filter type. PNG 1.0-1.2 only define the single type. */ +#define PNG_FILTER_TYPE_BASE 0 /* Single row per-byte filtering */ +#define PNG_INTRAPIXEL_DIFFERENCING 64 /* Used only in MNG datastreams */ +#define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE + +/* These are for the interlacing type. These values should NOT be changed. */ +#define PNG_INTERLACE_NONE 0 /* Non-interlaced image */ +#define PNG_INTERLACE_ADAM7 1 /* Adam7 interlacing */ +#define PNG_INTERLACE_LAST 2 /* Not a valid value */ + +/* These are for the oFFs chunk. These values should NOT be changed. */ +#define PNG_OFFSET_PIXEL 0 /* Offset in pixels */ +#define PNG_OFFSET_MICROMETER 1 /* Offset in micrometers (1/10^6 meter) */ +#define PNG_OFFSET_LAST 2 /* Not a valid value */ + +/* These are for the pCAL chunk. These values should NOT be changed. */ +#define PNG_EQUATION_LINEAR 0 /* Linear transformation */ +#define PNG_EQUATION_BASE_E 1 /* Exponential base e transform */ +#define PNG_EQUATION_ARBITRARY 2 /* Arbitrary base exponential transform */ +#define PNG_EQUATION_HYPERBOLIC 3 /* Hyperbolic sine transformation */ +#define PNG_EQUATION_LAST 4 /* Not a valid value */ + +/* These are for the sCAL chunk. These values should NOT be changed. */ +#define PNG_SCALE_UNKNOWN 0 /* unknown unit (image scale) */ +#define PNG_SCALE_METER 1 /* meters per pixel */ +#define PNG_SCALE_RADIAN 2 /* radians per pixel */ +#define PNG_SCALE_LAST 3 /* Not a valid value */ + +/* These are for the pHYs chunk. These values should NOT be changed. */ +#define PNG_RESOLUTION_UNKNOWN 0 /* pixels/unknown unit (aspect ratio) */ +#define PNG_RESOLUTION_METER 1 /* pixels/meter */ +#define PNG_RESOLUTION_LAST 2 /* Not a valid value */ + +/* These are for the sRGB chunk. These values should NOT be changed. */ +#define PNG_sRGB_INTENT_PERCEPTUAL 0 +#define PNG_sRGB_INTENT_RELATIVE 1 +#define PNG_sRGB_INTENT_SATURATION 2 +#define PNG_sRGB_INTENT_ABSOLUTE 3 +#define PNG_sRGB_INTENT_LAST 4 /* Not a valid value */ + +/* This is for text chunks */ +#define PNG_KEYWORD_MAX_LENGTH 79 + +/* Maximum number of entries in PLTE/sPLT/tRNS arrays */ +#define PNG_MAX_PALETTE_LENGTH 256 + +/* These determine if an ancillary chunk's data has been successfully read + * from the PNG header, or if the application has filled in the corresponding + * data in the info_struct to be written into the output file. The values + * of the PNG_INFO_<chunk> defines should NOT be changed. + */ +#define PNG_INFO_gAMA 0x0001 +#define PNG_INFO_sBIT 0x0002 +#define PNG_INFO_cHRM 0x0004 +#define PNG_INFO_PLTE 0x0008 +#define PNG_INFO_tRNS 0x0010 +#define PNG_INFO_bKGD 0x0020 +#define PNG_INFO_hIST 0x0040 +#define PNG_INFO_pHYs 0x0080 +#define PNG_INFO_oFFs 0x0100 +#define PNG_INFO_tIME 0x0200 +#define PNG_INFO_pCAL 0x0400 +#define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */ +#define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ +#define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ +#define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ +#define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */ + +/* This is used for the transformation routines, as some of them + * change these values for the row. It also should enable using + * the routines for other purposes. + */ +typedef struct png_row_info_struct +{ + png_uint_32 width; /* width of row */ + png_uint_32 rowbytes; /* number of bytes in row */ + png_byte color_type; /* color type of row */ + png_byte bit_depth; /* bit depth of row */ + png_byte channels; /* number of channels (1, 2, 3, or 4) */ + png_byte pixel_depth; /* bits per pixel (depth * channels) */ +} png_row_info; + +typedef png_row_info FAR * png_row_infop; +typedef png_row_info FAR * FAR * png_row_infopp; + +/* These are the function types for the I/O functions and for the functions + * that allow the user to override the default I/O functions with his or her + * own. The png_error_ptr type should match that of user-supplied warning + * and error functions, while the png_rw_ptr type should match that of the + * user read/write data functions. + */ +typedef struct png_struct_def png_struct; +typedef png_struct FAR * png_structp; + +typedef void (PNGAPI *png_error_ptr) PNGARG((png_structp, png_const_charp)); +typedef void (PNGAPI *png_rw_ptr) PNGARG((png_structp, png_bytep, png_size_t)); +typedef void (PNGAPI *png_flush_ptr) PNGARG((png_structp)); +typedef void (PNGAPI *png_read_status_ptr) PNGARG((png_structp, png_uint_32, + int)); +typedef void (PNGAPI *png_write_status_ptr) PNGARG((png_structp, png_uint_32, + int)); + +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED +typedef void (PNGAPI *png_progressive_info_ptr) PNGARG((png_structp, png_infop)); +typedef void (PNGAPI *png_progressive_end_ptr) PNGARG((png_structp, png_infop)); +typedef void (PNGAPI *png_progressive_row_ptr) PNGARG((png_structp, png_bytep, + png_uint_32, int)); +#endif + +#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_LEGACY_SUPPORTED) +typedef void (PNGAPI *png_user_transform_ptr) PNGARG((png_structp, + png_row_infop, png_bytep)); +#endif + +#ifdef PNG_USER_CHUNKS_SUPPORTED +typedef int (PNGAPI *png_user_chunk_ptr) PNGARG((png_structp, png_unknown_chunkp)); +#endif +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED +typedef void (PNGAPI *png_unknown_chunk_ptr) PNGARG((png_structp)); +#endif + +/* Transform masks for the high-level interface */ +#define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */ +#define PNG_TRANSFORM_STRIP_16 0x0001 /* read only */ +#define PNG_TRANSFORM_STRIP_ALPHA 0x0002 /* read only */ +#define PNG_TRANSFORM_PACKING 0x0004 /* read and write */ +#define PNG_TRANSFORM_PACKSWAP 0x0008 /* read and write */ +#define PNG_TRANSFORM_EXPAND 0x0010 /* read only */ +#define PNG_TRANSFORM_INVERT_MONO 0x0020 /* read and write */ +#define PNG_TRANSFORM_SHIFT 0x0040 /* read and write */ +#define PNG_TRANSFORM_BGR 0x0080 /* read and write */ +#define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */ +#define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */ +#define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */ +#define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only, deprecated */ +/* Added to libpng-1.2.34 */ +#define PNG_TRANSFORM_STRIP_FILLER_BEFORE 0x0800 /* write only */ +#define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */ +/* Added to libpng-1.2.41 */ +#define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */ + +/* Flags for MNG supported features */ +#define PNG_FLAG_MNG_EMPTY_PLTE 0x01 +#define PNG_FLAG_MNG_FILTER_64 0x04 +#define PNG_ALL_MNG_FEATURES 0x05 + +typedef png_voidp (*png_malloc_ptr) PNGARG((png_structp, png_size_t)); +typedef void (*png_free_ptr) PNGARG((png_structp, png_voidp)); + +/* The structure that holds the information to read and write PNG files. + * The only people who need to care about what is inside of this are the + * people who will be modifying the library for their own special needs. + * It should NOT be accessed directly by an application, except to store + * the jmp_buf. + */ + +struct png_struct_def +{ +#ifdef PNG_SETJMP_SUPPORTED + jmp_buf jmpbuf; /* used in png_error */ +#endif + png_error_ptr error_fn PNG_DEPSTRUCT; /* function for printing errors and aborting */ + png_error_ptr warning_fn PNG_DEPSTRUCT; /* function for printing warnings */ + png_voidp error_ptr PNG_DEPSTRUCT; /* user supplied struct for error functions */ + png_rw_ptr write_data_fn PNG_DEPSTRUCT; /* function for writing output data */ + png_rw_ptr read_data_fn PNG_DEPSTRUCT; /* function for reading input data */ + png_voidp io_ptr PNG_DEPSTRUCT; /* ptr to application struct for I/O functions */ + +#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED + png_user_transform_ptr read_user_transform_fn PNG_DEPSTRUCT; /* user read transform */ +#endif + +#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED + png_user_transform_ptr write_user_transform_fn PNG_DEPSTRUCT; /* user write transform */ +#endif + +/* These were added in libpng-1.0.2 */ +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED +#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) + png_voidp user_transform_ptr PNG_DEPSTRUCT; /* user supplied struct for user transform */ + png_byte user_transform_depth PNG_DEPSTRUCT; /* bit depth of user transformed pixels */ + png_byte user_transform_channels PNG_DEPSTRUCT; /* channels in user transformed pixels */ +#endif +#endif + + png_uint_32 mode PNG_DEPSTRUCT; /* tells us where we are in the PNG file */ + png_uint_32 flags PNG_DEPSTRUCT; /* flags indicating various things to libpng */ + png_uint_32 transformations PNG_DEPSTRUCT; /* which transformations to perform */ + + z_stream zstream PNG_DEPSTRUCT; /* pointer to decompression structure (below) */ + png_bytep zbuf PNG_DEPSTRUCT; /* buffer for zlib */ + png_size_t zbuf_size PNG_DEPSTRUCT; /* size of zbuf */ + int zlib_level PNG_DEPSTRUCT; /* holds zlib compression level */ + int zlib_method PNG_DEPSTRUCT; /* holds zlib compression method */ + int zlib_window_bits PNG_DEPSTRUCT; /* holds zlib compression window bits */ + int zlib_mem_level PNG_DEPSTRUCT; /* holds zlib compression memory level */ + int zlib_strategy PNG_DEPSTRUCT; /* holds zlib compression strategy */ + + png_uint_32 width PNG_DEPSTRUCT; /* width of image in pixels */ + png_uint_32 height PNG_DEPSTRUCT; /* height of image in pixels */ + png_uint_32 num_rows PNG_DEPSTRUCT; /* number of rows in current pass */ + png_uint_32 usr_width PNG_DEPSTRUCT; /* width of row at start of write */ + png_uint_32 rowbytes PNG_DEPSTRUCT; /* size of row in bytes */ +#if 0 /* Replaced with the following in libpng-1.2.43 */ + png_size_t irowbytes PNG_DEPSTRUCT; +#endif +/* Added in libpng-1.2.43 */ +#ifdef PNG_USER_LIMITS_SUPPORTED + /* Added in libpng-1.4.0: Total number of sPLT, text, and unknown + * chunks that can be stored (0 means unlimited). + */ + png_uint_32 user_chunk_cache_max PNG_DEPSTRUCT; +#endif + png_uint_32 iwidth PNG_DEPSTRUCT; /* width of current interlaced row in pixels */ + png_uint_32 row_number PNG_DEPSTRUCT; /* current row in interlace pass */ + png_bytep prev_row PNG_DEPSTRUCT; /* buffer to save previous (unfiltered) row */ + png_bytep row_buf PNG_DEPSTRUCT; /* buffer to save current (unfiltered) row */ +#ifndef PNG_NO_WRITE_FILTER + png_bytep sub_row PNG_DEPSTRUCT; /* buffer to save "sub" row when filtering */ + png_bytep up_row PNG_DEPSTRUCT; /* buffer to save "up" row when filtering */ + png_bytep avg_row PNG_DEPSTRUCT; /* buffer to save "avg" row when filtering */ + png_bytep paeth_row PNG_DEPSTRUCT; /* buffer to save "Paeth" row when filtering */ +#endif + png_row_info row_info PNG_DEPSTRUCT; /* used for transformation routines */ + + png_uint_32 idat_size PNG_DEPSTRUCT; /* current IDAT size for read */ + png_uint_32 crc PNG_DEPSTRUCT; /* current chunk CRC value */ + png_colorp palette PNG_DEPSTRUCT; /* palette from the input file */ + png_uint_16 num_palette PNG_DEPSTRUCT; /* number of color entries in palette */ + png_uint_16 num_trans PNG_DEPSTRUCT; /* number of transparency values */ + png_byte chunk_name[5] PNG_DEPSTRUCT; /* null-terminated name of current chunk */ + png_byte compression PNG_DEPSTRUCT; /* file compression type (always 0) */ + png_byte filter PNG_DEPSTRUCT; /* file filter type (always 0) */ + png_byte interlaced PNG_DEPSTRUCT; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ + png_byte pass PNG_DEPSTRUCT; /* current interlace pass (0 - 6) */ + png_byte do_filter PNG_DEPSTRUCT; /* row filter flags (see PNG_FILTER_ below ) */ + png_byte color_type PNG_DEPSTRUCT; /* color type of file */ + png_byte bit_depth PNG_DEPSTRUCT; /* bit depth of file */ + png_byte usr_bit_depth PNG_DEPSTRUCT; /* bit depth of users row */ + png_byte pixel_depth PNG_DEPSTRUCT; /* number of bits per pixel */ + png_byte channels PNG_DEPSTRUCT; /* number of channels in file */ + png_byte usr_channels PNG_DEPSTRUCT; /* channels at start of write */ + png_byte sig_bytes PNG_DEPSTRUCT; /* magic bytes read/written from start of file */ + +#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) +#ifdef PNG_LEGACY_SUPPORTED + png_byte filler PNG_DEPSTRUCT; /* filler byte for pixel expansion */ +#else + png_uint_16 filler PNG_DEPSTRUCT; /* filler bytes for pixel expansion */ +#endif +#endif + +#ifdef PNG_bKGD_SUPPORTED + png_byte background_gamma_type PNG_DEPSTRUCT; +# ifdef PNG_FLOATING_POINT_SUPPORTED + float background_gamma PNG_DEPSTRUCT; +# endif + png_color_16 background PNG_DEPSTRUCT; /* background color in screen gamma space */ +#ifdef PNG_READ_GAMMA_SUPPORTED + png_color_16 background_1 PNG_DEPSTRUCT; /* background normalized to gamma 1.0 */ +#endif +#endif /* PNG_bKGD_SUPPORTED */ + +#ifdef PNG_WRITE_FLUSH_SUPPORTED + png_flush_ptr output_flush_fn PNG_DEPSTRUCT; /* Function for flushing output */ + png_uint_32 flush_dist PNG_DEPSTRUCT; /* how many rows apart to flush, 0 - no flush */ + png_uint_32 flush_rows PNG_DEPSTRUCT; /* number of rows written since last flush */ +#endif + +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) + int gamma_shift PNG_DEPSTRUCT; /* number of "insignificant" bits 16-bit gamma */ +#ifdef PNG_FLOATING_POINT_SUPPORTED + float gamma PNG_DEPSTRUCT; /* file gamma value */ + float screen_gamma PNG_DEPSTRUCT; /* screen gamma value (display_exponent) */ +#endif +#endif + +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) + png_bytep gamma_table PNG_DEPSTRUCT; /* gamma table for 8-bit depth files */ + png_bytep gamma_from_1 PNG_DEPSTRUCT; /* converts from 1.0 to screen */ + png_bytep gamma_to_1 PNG_DEPSTRUCT; /* converts from file to 1.0 */ + png_uint_16pp gamma_16_table PNG_DEPSTRUCT; /* gamma table for 16-bit depth files */ + png_uint_16pp gamma_16_from_1 PNG_DEPSTRUCT; /* converts from 1.0 to screen */ + png_uint_16pp gamma_16_to_1 PNG_DEPSTRUCT; /* converts from file to 1.0 */ +#endif + +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED) + png_color_8 sig_bit PNG_DEPSTRUCT; /* significant bits in each available channel */ +#endif + +#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) + png_color_8 shift PNG_DEPSTRUCT; /* shift for significant bit tranformation */ +#endif + +#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \ + || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) + png_bytep trans PNG_DEPSTRUCT; /* transparency values for paletted files */ + png_color_16 trans_values PNG_DEPSTRUCT; /* transparency values for non-paletted files */ +#endif + + png_read_status_ptr read_row_fn PNG_DEPSTRUCT; /* called after each row is decoded */ + png_write_status_ptr write_row_fn PNG_DEPSTRUCT; /* called after each row is encoded */ +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED + png_progressive_info_ptr info_fn PNG_DEPSTRUCT; /* called after header data fully read */ + png_progressive_row_ptr row_fn PNG_DEPSTRUCT; /* called after each prog. row is decoded */ + png_progressive_end_ptr end_fn PNG_DEPSTRUCT; /* called after image is complete */ + png_bytep save_buffer_ptr PNG_DEPSTRUCT; /* current location in save_buffer */ + png_bytep save_buffer PNG_DEPSTRUCT; /* buffer for previously read data */ + png_bytep current_buffer_ptr PNG_DEPSTRUCT; /* current location in current_buffer */ + png_bytep current_buffer PNG_DEPSTRUCT; /* buffer for recently used data */ + png_uint_32 push_length PNG_DEPSTRUCT; /* size of current input chunk */ + png_uint_32 skip_length PNG_DEPSTRUCT; /* bytes to skip in input data */ + png_size_t save_buffer_size PNG_DEPSTRUCT; /* amount of data now in save_buffer */ + png_size_t save_buffer_max PNG_DEPSTRUCT; /* total size of save_buffer */ + png_size_t buffer_size PNG_DEPSTRUCT; /* total amount of available input data */ + png_size_t current_buffer_size PNG_DEPSTRUCT; /* amount of data now in current_buffer */ + int process_mode PNG_DEPSTRUCT; /* what push library is currently doing */ + int cur_palette PNG_DEPSTRUCT; /* current push library palette index */ + +# ifdef PNG_TEXT_SUPPORTED + png_size_t current_text_size PNG_DEPSTRUCT; /* current size of text input data */ + png_size_t current_text_left PNG_DEPSTRUCT; /* how much text left to read in input */ + png_charp current_text PNG_DEPSTRUCT; /* current text chunk buffer */ + png_charp current_text_ptr PNG_DEPSTRUCT; /* current location in current_text */ +# endif /* PNG_TEXT_SUPPORTED */ +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ + +#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) +/* for the Borland special 64K segment handler */ + png_bytepp offset_table_ptr PNG_DEPSTRUCT; + png_bytep offset_table PNG_DEPSTRUCT; + png_uint_16 offset_table_number PNG_DEPSTRUCT; + png_uint_16 offset_table_count PNG_DEPSTRUCT; + png_uint_16 offset_table_count_free PNG_DEPSTRUCT; +#endif + +#ifdef PNG_READ_DITHER_SUPPORTED + png_bytep palette_lookup PNG_DEPSTRUCT; /* lookup table for dithering */ + png_bytep dither_index PNG_DEPSTRUCT; /* index translation for palette files */ +#endif + +#if defined(PNG_READ_DITHER_SUPPORTED) || defined(PNG_hIST_SUPPORTED) + 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 + +/* New members added in libpng-1.0.6 */ + +#ifdef PNG_FREE_ME_SUPPORTED + png_uint_32 free_me PNG_DEPSTRUCT; /* flags items libpng is responsible for freeing */ +#endif + +#ifdef PNG_USER_CHUNKS_SUPPORTED + png_voidp user_chunk_ptr PNG_DEPSTRUCT; + png_user_chunk_ptr read_user_chunk_fn PNG_DEPSTRUCT; /* user read chunk handler */ +#endif + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED + int num_chunk_list PNG_DEPSTRUCT; + png_bytep chunk_list PNG_DEPSTRUCT; +#endif + +/* New members added in libpng-1.0.3 */ +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED + png_byte rgb_to_gray_status PNG_DEPSTRUCT; + /* These were changed from png_byte in libpng-1.0.6 */ + png_uint_16 rgb_to_gray_red_coeff PNG_DEPSTRUCT; + png_uint_16 rgb_to_gray_green_coeff PNG_DEPSTRUCT; + png_uint_16 rgb_to_gray_blue_coeff PNG_DEPSTRUCT; +#endif + +/* New member added in libpng-1.0.4 (renamed in 1.0.9) */ +#if defined(PNG_MNG_FEATURES_SUPPORTED) || \ + defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ + defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) +/* Changed from png_byte to png_uint_32 at version 1.2.0 */ +#ifdef PNG_1_0_X + png_byte mng_features_permitted PNG_DEPSTRUCT; +#else + png_uint_32 mng_features_permitted PNG_DEPSTRUCT; +#endif /* PNG_1_0_X */ +#endif + +/* New member added in libpng-1.0.7 */ +#if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) + png_fixed_point int_gamma PNG_DEPSTRUCT; +#endif + +/* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */ +#ifdef PNG_MNG_FEATURES_SUPPORTED + png_byte filter_type PNG_DEPSTRUCT; +#endif + +#ifdef PNG_1_0_X +/* New member added in libpng-1.0.10, ifdef'ed out in 1.2.0 */ + png_uint_32 row_buf_size PNG_DEPSTRUCT; +#endif + +/* New members added in libpng-1.2.0 */ +#ifdef PNG_ASSEMBLER_CODE_SUPPORTED +# ifndef PNG_1_0_X +# ifdef PNG_MMX_CODE_SUPPORTED + png_byte mmx_bitdepth_threshold PNG_DEPSTRUCT; + png_uint_32 mmx_rowbytes_threshold PNG_DEPSTRUCT; +# endif + png_uint_32 asm_flags PNG_DEPSTRUCT; +# endif +#endif + +/* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */ +#ifdef PNG_USER_MEM_SUPPORTED + png_voidp mem_ptr PNG_DEPSTRUCT; /* user supplied struct for mem functions */ + png_malloc_ptr malloc_fn PNG_DEPSTRUCT; /* function for allocating memory */ + png_free_ptr free_fn PNG_DEPSTRUCT; /* function for freeing memory */ +#endif + +/* New member added in libpng-1.0.13 and 1.2.0 */ + png_bytep big_row_buf PNG_DEPSTRUCT; /* buffer to save current (unfiltered) row */ + +#ifdef PNG_READ_DITHER_SUPPORTED +/* The following three members were added at version 1.0.14 and 1.2.4 */ + png_bytep dither_sort PNG_DEPSTRUCT; /* working sort array */ + png_bytep index_to_palette PNG_DEPSTRUCT; /* where the original index currently is */ + /* in the palette */ + png_bytep palette_to_index PNG_DEPSTRUCT; /* which original index points to this */ + /* palette color */ +#endif + +/* New members added in libpng-1.0.16 and 1.2.6 */ + png_byte compression_type PNG_DEPSTRUCT; + +#ifdef PNG_USER_LIMITS_SUPPORTED + png_uint_32 user_width_max PNG_DEPSTRUCT; + png_uint_32 user_height_max PNG_DEPSTRUCT; +#endif + +/* New member added in libpng-1.0.25 and 1.2.17 */ +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED + /* Storage for unknown chunk that the library doesn't recognize. */ + png_unknown_chunk unknown_chunk PNG_DEPSTRUCT; +#endif + +/* New members added in libpng-1.2.26 */ + png_uint_32 old_big_row_buf_size PNG_DEPSTRUCT; + png_uint_32 old_prev_row_size PNG_DEPSTRUCT; + +/* New member added in libpng-1.2.30 */ + png_charp chunkdata PNG_DEPSTRUCT; /* buffer for reading chunk data */ + + +}; + + +/* 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_46; + +typedef png_struct FAR * FAR * png_structpp; + +/* Here are the function definitions most commonly used. This is not + * the place to find out how to use libpng. See libpng.txt for the + * full explanation, see example.c for the summary. This just provides + * a simple one line description of the use of each function. + */ + +/* Returns the version number of the library */ +extern PNG_EXPORT(png_uint_32,png_access_version_number) PNGARG((void)); + +/* Tell lib we have already handled the first <num_bytes> magic bytes. + * Handling more than 8 bytes from the beginning of the file is an error. + */ +extern PNG_EXPORT(void,png_set_sig_bytes) PNGARG((png_structp png_ptr, + int num_bytes)); + +/* Check sig[start] through sig[start + num_to_check - 1] to see if it's a + * PNG file. Returns zero if the supplied bytes match the 8-byte PNG + * signature, and non-zero otherwise. Having num_to_check == 0 or + * start > 7 will always fail (ie return non-zero). + */ +extern PNG_EXPORT(int,png_sig_cmp) PNGARG((png_bytep sig, png_size_t start, + png_size_t num_to_check)); + +/* Simple signature checking function. This is the same as calling + * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). + */ +extern PNG_EXPORT(int,png_check_sig) PNGARG((png_bytep sig, int num)) PNG_DEPRECATED; + +/* Allocate and initialize png_ptr struct for reading, and any other memory. */ +extern PNG_EXPORT(png_structp,png_create_read_struct) + PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn)) PNG_ALLOCATED; + +/* Allocate and initialize png_ptr struct for writing, and any other memory */ +extern PNG_EXPORT(png_structp,png_create_write_struct) + PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn)) PNG_ALLOCATED; + +#ifdef PNG_WRITE_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_compression_buffer_size) + PNGARG((png_structp png_ptr)); +#endif + +#ifdef PNG_WRITE_SUPPORTED +extern PNG_EXPORT(void,png_set_compression_buffer_size) + PNGARG((png_structp png_ptr, png_uint_32 size)); +#endif + +/* Reset the compression stream */ +extern PNG_EXPORT(int,png_reset_zstream) PNGARG((png_structp png_ptr)); + +/* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */ +#ifdef PNG_USER_MEM_SUPPORTED +extern PNG_EXPORT(png_structp,png_create_read_struct_2) + PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, + png_malloc_ptr malloc_fn, png_free_ptr free_fn)) PNG_ALLOCATED; +extern PNG_EXPORT(png_structp,png_create_write_struct_2) + PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, + png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, + png_malloc_ptr malloc_fn, png_free_ptr free_fn)) PNG_ALLOCATED; +#endif + +/* Write a PNG chunk - size, type, (optional) data, CRC. */ +extern PNG_EXPORT(void,png_write_chunk) PNGARG((png_structp png_ptr, + png_bytep chunk_name, png_bytep data, png_size_t length)); + +/* Write the start of a PNG chunk - length and chunk name. */ +extern PNG_EXPORT(void,png_write_chunk_start) PNGARG((png_structp png_ptr, + png_bytep chunk_name, png_uint_32 length)); + +/* Write the data of a PNG chunk started with png_write_chunk_start(). */ +extern PNG_EXPORT(void,png_write_chunk_data) PNGARG((png_structp png_ptr, + png_bytep data, png_size_t length)); + +/* Finish a chunk started with png_write_chunk_start() (includes CRC). */ +extern PNG_EXPORT(void,png_write_chunk_end) PNGARG((png_structp png_ptr)); + +/* Allocate and initialize the info structure */ +extern PNG_EXPORT(png_infop,png_create_info_struct) + PNGARG((png_structp png_ptr)) PNG_ALLOCATED; + +#if defined(PNG_1_0_X) || defined (PNG_1_2_X) +/* Initialize the info structure (old interface - DEPRECATED) */ +extern PNG_EXPORT(void,png_info_init) PNGARG((png_infop info_ptr)) + PNG_DEPRECATED; +#undef png_info_init +#define png_info_init(info_ptr) png_info_init_3(&info_ptr,\ + png_sizeof(png_info)); +#endif + +extern PNG_EXPORT(void,png_info_init_3) PNGARG((png_infopp info_ptr, + png_size_t png_info_struct_size)); + +/* Writes all the PNG information before the image. */ +extern PNG_EXPORT(void,png_write_info_before_PLTE) PNGARG((png_structp png_ptr, + png_infop info_ptr)); +extern PNG_EXPORT(void,png_write_info) PNGARG((png_structp png_ptr, + png_infop info_ptr)); + +#ifdef PNG_SEQUENTIAL_READ_SUPPORTED +/* Read the information before the actual image data. */ +extern PNG_EXPORT(void,png_read_info) PNGARG((png_structp png_ptr, + png_infop info_ptr)); +#endif + +#ifdef PNG_TIME_RFC1123_SUPPORTED +extern PNG_EXPORT(png_charp,png_convert_to_rfc1123) + PNGARG((png_structp png_ptr, png_timep ptime)); +#endif + +#ifdef PNG_CONVERT_tIME_SUPPORTED +/* Convert from a struct tm to png_time */ +extern PNG_EXPORT(void,png_convert_from_struct_tm) PNGARG((png_timep ptime, + struct tm FAR * ttime)); + +/* Convert from time_t to png_time. Uses gmtime() */ +extern PNG_EXPORT(void,png_convert_from_time_t) PNGARG((png_timep ptime, + time_t ttime)); +#endif /* PNG_CONVERT_tIME_SUPPORTED */ + +#ifdef PNG_READ_EXPAND_SUPPORTED +/* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ +extern PNG_EXPORT(void,png_set_expand) PNGARG((png_structp png_ptr)); +#ifndef PNG_1_0_X +extern PNG_EXPORT(void,png_set_expand_gray_1_2_4_to_8) PNGARG((png_structp + png_ptr)); +#endif +extern PNG_EXPORT(void,png_set_palette_to_rgb) PNGARG((png_structp png_ptr)); +extern PNG_EXPORT(void,png_set_tRNS_to_alpha) PNGARG((png_structp png_ptr)); +#if defined(PNG_1_0_X) || defined (PNG_1_2_X) +/* Deprecated */ +extern PNG_EXPORT(void,png_set_gray_1_2_4_to_8) PNGARG((png_structp + png_ptr)) PNG_DEPRECATED; +#endif +#endif + +#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) +/* Use blue, green, red order for pixels. */ +extern PNG_EXPORT(void,png_set_bgr) PNGARG((png_structp png_ptr)); +#endif + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED +/* Expand the grayscale to 24-bit RGB if necessary. */ +extern PNG_EXPORT(void,png_set_gray_to_rgb) PNGARG((png_structp png_ptr)); +#endif + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +/* Reduce RGB to grayscale. */ +#ifdef PNG_FLOATING_POINT_SUPPORTED +extern PNG_EXPORT(void,png_set_rgb_to_gray) PNGARG((png_structp png_ptr, + int error_action, double red, double green )); +#endif +extern PNG_EXPORT(void,png_set_rgb_to_gray_fixed) PNGARG((png_structp png_ptr, + int error_action, png_fixed_point red, png_fixed_point green )); +extern PNG_EXPORT(png_byte,png_get_rgb_to_gray_status) PNGARG((png_structp + png_ptr)); +#endif + +extern PNG_EXPORT(void,png_build_grayscale_palette) PNGARG((int bit_depth, + png_colorp palette)); + +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED +extern PNG_EXPORT(void,png_set_strip_alpha) PNGARG((png_structp png_ptr)); +#endif + +#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ + defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) +extern PNG_EXPORT(void,png_set_swap_alpha) PNGARG((png_structp png_ptr)); +#endif + +#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ + defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) +extern PNG_EXPORT(void,png_set_invert_alpha) PNGARG((png_structp png_ptr)); +#endif + +#if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) +/* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ +extern PNG_EXPORT(void,png_set_filler) PNGARG((png_structp png_ptr, + png_uint_32 filler, int flags)); +/* The values of the PNG_FILLER_ defines should NOT be changed */ +#define PNG_FILLER_BEFORE 0 +#define PNG_FILLER_AFTER 1 +/* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ +#ifndef PNG_1_0_X +extern PNG_EXPORT(void,png_set_add_alpha) PNGARG((png_structp png_ptr, + png_uint_32 filler, int flags)); +#endif +#endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ + +#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) +/* Swap bytes in 16-bit depth files. */ +extern PNG_EXPORT(void,png_set_swap) PNGARG((png_structp png_ptr)); +#endif + +#if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) +/* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ +extern PNG_EXPORT(void,png_set_packing) PNGARG((png_structp png_ptr)); +#endif + +#if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED) +/* Swap packing order of pixels in bytes. */ +extern PNG_EXPORT(void,png_set_packswap) PNGARG((png_structp png_ptr)); +#endif + +#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) +/* Converts files to legal bit depths. */ +extern PNG_EXPORT(void,png_set_shift) PNGARG((png_structp png_ptr, + png_color_8p true_bits)); +#endif + +#if defined(PNG_READ_INTERLACING_SUPPORTED) || \ + defined(PNG_WRITE_INTERLACING_SUPPORTED) +/* Have the code handle the interlacing. Returns the number of passes. */ +extern PNG_EXPORT(int,png_set_interlace_handling) PNGARG((png_structp png_ptr)); +#endif + +#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) +/* Invert monochrome files */ +extern PNG_EXPORT(void,png_set_invert_mono) PNGARG((png_structp png_ptr)); +#endif + +#ifdef PNG_READ_BACKGROUND_SUPPORTED +/* Handle alpha and tRNS by replacing with a background color. */ +#ifdef PNG_FLOATING_POINT_SUPPORTED +extern PNG_EXPORT(void,png_set_background) PNGARG((png_structp png_ptr, + png_color_16p background_color, int background_gamma_code, + int need_expand, double background_gamma)); +#endif +#define PNG_BACKGROUND_GAMMA_UNKNOWN 0 +#define PNG_BACKGROUND_GAMMA_SCREEN 1 +#define PNG_BACKGROUND_GAMMA_FILE 2 +#define PNG_BACKGROUND_GAMMA_UNIQUE 3 +#endif + +#ifdef PNG_READ_16_TO_8_SUPPORTED +/* Strip the second byte of information from a 16-bit depth file. */ +extern PNG_EXPORT(void,png_set_strip_16) PNGARG((png_structp png_ptr)); +#endif + +#ifdef PNG_READ_DITHER_SUPPORTED +/* Turn on dithering, and reduce the palette to the number of colors available. */ +extern PNG_EXPORT(void,png_set_dither) PNGARG((png_structp png_ptr, + png_colorp palette, int num_palette, int maximum_colors, + png_uint_16p histogram, int full_dither)); +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED +/* Handle gamma correction. Screen_gamma=(display_exponent) */ +#ifdef PNG_FLOATING_POINT_SUPPORTED +extern PNG_EXPORT(void,png_set_gamma) PNGARG((png_structp png_ptr, + double screen_gamma, double default_file_gamma)); +#endif +#endif + +#if defined(PNG_1_0_X) || defined (PNG_1_2_X) +#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ + defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) +/* Permit or disallow empty PLTE (0: not permitted, 1: permitted) */ +/* Deprecated and will be removed. Use png_permit_mng_features() instead. */ +extern PNG_EXPORT(void,png_permit_empty_plte) PNGARG((png_structp png_ptr, + int empty_plte_permitted)) PNG_DEPRECATED; +#endif +#endif + +#ifdef PNG_WRITE_FLUSH_SUPPORTED +/* Set how many lines between output flushes - 0 for no flushing */ +extern PNG_EXPORT(void,png_set_flush) PNGARG((png_structp png_ptr, int nrows)); +/* Flush the current PNG output buffer */ +extern PNG_EXPORT(void,png_write_flush) PNGARG((png_structp png_ptr)); +#endif + +/* Optional update palette with requested transformations */ +extern PNG_EXPORT(void,png_start_read_image) PNGARG((png_structp png_ptr)); + +/* Optional call to update the users info structure */ +extern PNG_EXPORT(void,png_read_update_info) PNGARG((png_structp png_ptr, + png_infop info_ptr)); + +#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED +/* Read one or more rows of image data. */ +extern PNG_EXPORT(void,png_read_rows) PNGARG((png_structp png_ptr, + png_bytepp row, png_bytepp display_row, png_uint_32 num_rows)); +#endif + +#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED +/* Read a row of data. */ +extern PNG_EXPORT(void,png_read_row) PNGARG((png_structp png_ptr, + png_bytep row, + png_bytep display_row)); +#endif + +#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED +/* Read the whole image into memory at once. */ +extern PNG_EXPORT(void,png_read_image) PNGARG((png_structp png_ptr, + png_bytepp image)); +#endif + +/* Write a row of image data */ +extern PNG_EXPORT(void,png_write_row) PNGARG((png_structp png_ptr, + png_bytep row)); + +/* Write a few rows of image data */ +extern PNG_EXPORT(void,png_write_rows) PNGARG((png_structp png_ptr, + png_bytepp row, png_uint_32 num_rows)); + +/* Write the image data */ +extern PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr, + png_bytepp image)); + +/* Writes the end of the PNG file. */ +extern PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr, + png_infop info_ptr)); + +#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED +/* Read the end of the PNG file. */ +extern PNG_EXPORT(void,png_read_end) PNGARG((png_structp png_ptr, + png_infop info_ptr)); +#endif + +/* Free any memory associated with the png_info_struct */ +extern PNG_EXPORT(void,png_destroy_info_struct) PNGARG((png_structp png_ptr, + png_infopp info_ptr_ptr)); + +/* Free any memory associated with the png_struct and the png_info_structs */ +extern PNG_EXPORT(void,png_destroy_read_struct) PNGARG((png_structpp + png_ptr_ptr, png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); + +/* Free all memory used by the read (old method - NOT DLL EXPORTED) */ +/* Debian note: exporting as it is required by legacy applications */ +extern PNG_EXPORT(void,png_read_destroy) PNGARG((png_structp png_ptr, png_infop info_ptr, + png_infop end_info_ptr)); + +/* Free any memory associated with the png_struct and the png_info_structs */ +extern PNG_EXPORT(void,png_destroy_write_struct) + PNGARG((png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)); + +/* Free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */ +/* Debian note: exporting as it is required by legacy applications */ +extern PNG_EXPORT(void,png_write_destroy) PNGARG((png_structp png_ptr)); + +/* Set the libpng method of handling chunk CRC errors */ +extern PNG_EXPORT(void,png_set_crc_action) PNGARG((png_structp png_ptr, + int crit_action, int ancil_action)); + +/* Values for png_set_crc_action() to say how to handle CRC errors in + * ancillary and critical chunks, and whether to use the data contained + * therein. Note that it is impossible to "discard" data in a critical + * chunk. For versions prior to 0.90, the action was always error/quit, + * whereas in version 0.90 and later, the action for CRC errors in ancillary + * chunks is warn/discard. These values should NOT be changed. + * + * value action:critical action:ancillary + */ +#define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */ +#define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */ +#define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */ +#define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */ +#define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ +#define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ + +/* These functions give the user control over the scan-line filtering in + * libpng and the compression methods used by zlib. These functions are + * mainly useful for testing, as the defaults should work with most users. + * Those users who are tight on memory or want faster performance at the + * expense of compression can modify them. See the compression library + * header file (zlib.h) for an explination of the compression functions. + */ + +/* Set the filtering method(s) used by libpng. Currently, the only valid + * value for "method" is 0. + */ +extern PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method, + int filters)); + +/* Flags for png_set_filter() to say which filters to use. The flags + * are chosen so that they don't conflict with real filter types + * below, in case they are supplied instead of the #defined constants. + * These values should NOT be changed. + */ +#define PNG_NO_FILTERS 0x00 +#define PNG_FILTER_NONE 0x08 +#define PNG_FILTER_SUB 0x10 +#define PNG_FILTER_UP 0x20 +#define PNG_FILTER_AVG 0x40 +#define PNG_FILTER_PAETH 0x80 +#define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \ + PNG_FILTER_AVG | PNG_FILTER_PAETH) + +/* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now. + * These defines should NOT be changed. + */ +#define PNG_FILTER_VALUE_NONE 0 +#define PNG_FILTER_VALUE_SUB 1 +#define PNG_FILTER_VALUE_UP 2 +#define PNG_FILTER_VALUE_AVG 3 +#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. + */ +#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, + png_doublep filter_costs)); +#endif +#endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ + +/* Heuristic used for row filter selection. These defines should NOT be + * changed. + */ +#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 */ +#define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ + +/* Set the library compression level. Currently, valid values range from + * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 + * (0 - no compression, 9 - "maximal" compression). Note that tests have + * shown that zlib compression levels 3-6 usually perform as well as level 9 + * for PNG images, and do considerably fewer caclulations. In the future, + * these values may not correspond directly to the zlib compression levels. + */ +extern PNG_EXPORT(void,png_set_compression_level) PNGARG((png_structp png_ptr, + int level)); + +extern PNG_EXPORT(void,png_set_compression_mem_level) + PNGARG((png_structp png_ptr, int mem_level)); + +extern PNG_EXPORT(void,png_set_compression_strategy) + PNGARG((png_structp png_ptr, int strategy)); + +extern PNG_EXPORT(void,png_set_compression_window_bits) + PNGARG((png_structp png_ptr, int window_bits)); + +extern PNG_EXPORT(void,png_set_compression_method) PNGARG((png_structp png_ptr, + int method)); + +/* These next functions are called for input/output, memory, and error + * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, + * and call standard C I/O routines such as fread(), fwrite(), and + * fprintf(). These functions can be made to use other I/O routines + * at run time for those applications that need to handle I/O in a + * different manner by calling png_set_???_fn(). See libpng.txt for + * more information. + */ + +#ifdef PNG_STDIO_SUPPORTED +/* Initialize the input/output for the PNG file to the default functions. */ +extern PNG_EXPORT(void,png_init_io) PNGARG((png_structp png_ptr, png_FILE_p fp)); +#endif + +/* Replace the (error and abort), and warning functions with user + * supplied functions. If no messages are to be printed you must still + * write and use replacement functions. The replacement error_fn should + * still do a longjmp to the last setjmp location if you are using this + * method of error handling. If error_fn or warning_fn is NULL, the + * default function will be used. + */ + +extern PNG_EXPORT(void,png_set_error_fn) PNGARG((png_structp png_ptr, + png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn)); + +/* Return the user pointer associated with the error functions */ +extern PNG_EXPORT(png_voidp,png_get_error_ptr) PNGARG((png_structp png_ptr)); + +/* Replace the default data output functions with a user supplied one(s). + * If buffered output is not used, then output_flush_fn can be set to NULL. + * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time + * output_flush_fn will be ignored (and thus can be NULL). + * It is probably a mistake to use NULL for output_flush_fn if + * write_data_fn is not also NULL unless you have built libpng with + * PNG_WRITE_FLUSH_SUPPORTED undefined, because in this case libpng's + * default flush function, which uses the standard *FILE structure, will + * be used. + */ +extern PNG_EXPORT(void,png_set_write_fn) PNGARG((png_structp png_ptr, + png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); + +/* Replace the default data input function with a user supplied one. */ +extern PNG_EXPORT(void,png_set_read_fn) PNGARG((png_structp png_ptr, + png_voidp io_ptr, png_rw_ptr read_data_fn)); + +/* Return the user pointer associated with the I/O functions */ +extern PNG_EXPORT(png_voidp,png_get_io_ptr) PNGARG((png_structp png_ptr)); + +extern PNG_EXPORT(void,png_set_read_status_fn) PNGARG((png_structp png_ptr, + png_read_status_ptr read_row_fn)); + +extern PNG_EXPORT(void,png_set_write_status_fn) PNGARG((png_structp png_ptr, + png_write_status_ptr write_row_fn)); + +#ifdef PNG_USER_MEM_SUPPORTED +/* Replace the default memory allocation functions with user supplied one(s). */ +extern PNG_EXPORT(void,png_set_mem_fn) PNGARG((png_structp png_ptr, + png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn)); +/* Return the user pointer associated with the memory functions */ +extern PNG_EXPORT(png_voidp,png_get_mem_ptr) PNGARG((png_structp png_ptr)); +#endif + +#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_LEGACY_SUPPORTED) +extern PNG_EXPORT(void,png_set_read_user_transform_fn) PNGARG((png_structp + png_ptr, png_user_transform_ptr read_user_transform_fn)); +#endif + +#if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_LEGACY_SUPPORTED) +extern PNG_EXPORT(void,png_set_write_user_transform_fn) PNGARG((png_structp + png_ptr, png_user_transform_ptr write_user_transform_fn)); +#endif + +#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_LEGACY_SUPPORTED) +extern PNG_EXPORT(void,png_set_user_transform_info) PNGARG((png_structp + png_ptr, png_voidp user_transform_ptr, int user_transform_depth, + int user_transform_channels)); +/* Return the user pointer associated with the user transform functions */ +extern PNG_EXPORT(png_voidp,png_get_user_transform_ptr) + PNGARG((png_structp png_ptr)); +#endif + +#ifdef PNG_USER_CHUNKS_SUPPORTED +extern PNG_EXPORT(void,png_set_read_user_chunk_fn) PNGARG((png_structp png_ptr, + png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); +extern PNG_EXPORT(png_voidp,png_get_user_chunk_ptr) PNGARG((png_structp + png_ptr)); +#endif + +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED +/* Sets the function callbacks for the push reader, and a pointer to a + * user-defined structure available to the callback functions. + */ +extern PNG_EXPORT(void,png_set_progressive_read_fn) PNGARG((png_structp png_ptr, + png_voidp progressive_ptr, + png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, + png_progressive_end_ptr end_fn)); + +/* Returns the user pointer associated with the push read functions */ +extern PNG_EXPORT(png_voidp,png_get_progressive_ptr) + PNGARG((png_structp png_ptr)); + +/* Function to be called when data becomes available */ +extern PNG_EXPORT(void,png_process_data) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_bytep buffer, png_size_t buffer_size)); + +/* Function that combines rows. Not very much different than the + * png_combine_row() call. Is this even used????? + */ +extern PNG_EXPORT(void,png_progressive_combine_row) PNGARG((png_structp png_ptr, + png_bytep old_row, png_bytep new_row)); +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ + +extern PNG_EXPORT(png_voidp,png_malloc) PNGARG((png_structp png_ptr, + png_uint_32 size)) PNG_ALLOCATED; + +#ifdef PNG_1_0_X +# define png_malloc_warn png_malloc +#else +/* Added at libpng version 1.2.4 */ +extern PNG_EXPORT(png_voidp,png_malloc_warn) PNGARG((png_structp png_ptr, + png_uint_32 size)) PNG_ALLOCATED; +#endif + +/* Frees a pointer allocated by png_malloc() */ +extern PNG_EXPORT(void,png_free) PNGARG((png_structp png_ptr, png_voidp ptr)); + +#ifdef PNG_1_0_X +/* Function to allocate memory for zlib. */ +extern PNG_EXPORT(voidpf,png_zalloc) PNGARG((voidpf png_ptr, uInt items, + uInt size)); + +/* Function to free memory for zlib */ +extern PNG_EXPORT(void,png_zfree) PNGARG((voidpf png_ptr, voidpf ptr)); +#endif + +/* Free data that was allocated internally */ +extern PNG_EXPORT(void,png_free_data) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 free_me, int num)); +#ifdef PNG_FREE_ME_SUPPORTED +/* Reassign responsibility for freeing existing data, whether allocated + * by libpng or by the application + */ +extern PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr, + png_infop info_ptr, int freer, png_uint_32 mask)); +#endif +/* Assignments for png_data_freer */ +#define PNG_DESTROY_WILL_FREE_DATA 1 +#define PNG_SET_WILL_FREE_DATA 1 +#define PNG_USER_WILL_FREE_DATA 2 +/* Flags for png_ptr->free_me and info_ptr->free_me */ +#define PNG_FREE_HIST 0x0008 +#define PNG_FREE_ICCP 0x0010 +#define PNG_FREE_SPLT 0x0020 +#define PNG_FREE_ROWS 0x0040 +#define PNG_FREE_PCAL 0x0080 +#define PNG_FREE_SCAL 0x0100 +#define PNG_FREE_UNKN 0x0200 +#define PNG_FREE_LIST 0x0400 +#define PNG_FREE_PLTE 0x1000 +#define PNG_FREE_TRNS 0x2000 +#define PNG_FREE_TEXT 0x4000 +#define PNG_FREE_ALL 0x7fff +#define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ + +#ifdef PNG_USER_MEM_SUPPORTED +extern PNG_EXPORT(png_voidp,png_malloc_default) PNGARG((png_structp png_ptr, + png_uint_32 size)) PNG_ALLOCATED; +extern PNG_EXPORT(void,png_free_default) PNGARG((png_structp png_ptr, + png_voidp ptr)); +#endif + +extern PNG_EXPORT(png_voidp,png_memcpy_check) PNGARG((png_structp png_ptr, + png_voidp s1, png_voidp s2, png_uint_32 size)) PNG_DEPRECATED; + +extern PNG_EXPORT(png_voidp,png_memset_check) PNGARG((png_structp png_ptr, + png_voidp s1, int value, png_uint_32 size)) PNG_DEPRECATED; + +#if defined(USE_FAR_KEYWORD) /* memory model conversion function */ +extern void *png_far_to_near PNGARG((png_structp png_ptr,png_voidp ptr, + int check)); +#endif /* USE_FAR_KEYWORD */ + +#ifndef PNG_NO_ERROR_TEXT +/* Fatal error in PNG image of libpng - can't continue */ +extern PNG_EXPORT(void,png_error) PNGARG((png_structp png_ptr, + png_const_charp error_message)) PNG_NORETURN; + +/* The same, but the chunk name is prepended to the error string. */ +extern PNG_EXPORT(void,png_chunk_error) PNGARG((png_structp png_ptr, + png_const_charp error_message)) PNG_NORETURN; +#else +/* Fatal error in PNG image of libpng - can't continue */ +extern PNG_EXPORT(void,png_err) PNGARG((png_structp png_ptr)) PNG_NORETURN; +#endif + +#ifndef PNG_NO_WARNINGS +/* Non-fatal error in libpng. Can continue, but may have a problem. */ +extern PNG_EXPORT(void,png_warning) PNGARG((png_structp png_ptr, + png_const_charp warning_message)); + +#ifdef PNG_READ_SUPPORTED +/* Non-fatal error in libpng, chunk name is prepended to message. */ +extern PNG_EXPORT(void,png_chunk_warning) PNGARG((png_structp png_ptr, + png_const_charp warning_message)); +#endif /* PNG_READ_SUPPORTED */ +#endif /* PNG_NO_WARNINGS */ + +/* The png_set_<chunk> functions are for storing values in the png_info_struct. + * Similarly, the png_get_<chunk> calls are used to read values from the + * png_info_struct, either storing the parameters in the passed variables, or + * setting pointers into the png_info_struct where the data is stored. The + * png_get_<chunk> functions return a non-zero value if the data was available + * in info_ptr, or return zero and do not change any of the parameters if the + * data was not available. + * + * These functions should be used instead of directly accessing png_info + * to avoid problems with future changes in the size and internal layout of + * png_info_struct. + */ +/* Returns "flag" if chunk data is valid in info_ptr. */ +extern PNG_EXPORT(png_uint_32,png_get_valid) PNGARG((png_structp png_ptr, +png_infop info_ptr, png_uint_32 flag)); + +/* Returns number of bytes needed to hold a transformed row. */ +extern PNG_EXPORT(png_uint_32,png_get_rowbytes) PNGARG((png_structp png_ptr, +png_infop info_ptr)); + +#ifdef PNG_INFO_IMAGE_SUPPORTED +/* Returns row_pointers, which is an array of pointers to scanlines that was + * returned from png_read_png(). + */ +extern PNG_EXPORT(png_bytepp,png_get_rows) PNGARG((png_structp png_ptr, +png_infop info_ptr)); +/* Set row_pointers, which is an array of pointers to scanlines for use + * by png_write_png(). + */ +extern PNG_EXPORT(void,png_set_rows) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_bytepp row_pointers)); +#endif + +/* Returns number of color channels in image. */ +extern PNG_EXPORT(png_byte,png_get_channels) PNGARG((png_structp png_ptr, +png_infop info_ptr)); + +#ifdef PNG_EASY_ACCESS_SUPPORTED +/* Returns image width in pixels. */ +extern PNG_EXPORT(png_uint_32, png_get_image_width) PNGARG((png_structp +png_ptr, png_infop info_ptr)); + +/* Returns image height in pixels. */ +extern PNG_EXPORT(png_uint_32, png_get_image_height) PNGARG((png_structp +png_ptr, png_infop info_ptr)); + +/* Returns image bit_depth. */ +extern PNG_EXPORT(png_byte, png_get_bit_depth) PNGARG((png_structp +png_ptr, png_infop info_ptr)); + +/* Returns image color_type. */ +extern PNG_EXPORT(png_byte, png_get_color_type) PNGARG((png_structp +png_ptr, png_infop info_ptr)); + +/* Returns image filter_type. */ +extern PNG_EXPORT(png_byte, png_get_filter_type) PNGARG((png_structp +png_ptr, png_infop info_ptr)); + +/* Returns image interlace_type. */ +extern PNG_EXPORT(png_byte, png_get_interlace_type) PNGARG((png_structp +png_ptr, png_infop info_ptr)); + +/* Returns image compression_type. */ +extern PNG_EXPORT(png_byte, png_get_compression_type) PNGARG((png_structp +png_ptr, png_infop info_ptr)); + +/* Returns image resolution in pixels per meter, from pHYs chunk data. */ +extern PNG_EXPORT(png_uint_32, png_get_pixels_per_meter) PNGARG((png_structp +png_ptr, png_infop info_ptr)); +extern PNG_EXPORT(png_uint_32, png_get_x_pixels_per_meter) PNGARG((png_structp +png_ptr, png_infop info_ptr)); +extern PNG_EXPORT(png_uint_32, png_get_y_pixels_per_meter) PNGARG((png_structp +png_ptr, png_infop info_ptr)); + +/* Returns pixel aspect ratio, computed from pHYs chunk data. */ +#ifdef PNG_FLOATING_POINT_SUPPORTED +extern PNG_EXPORT(float, png_get_pixel_aspect_ratio) PNGARG((png_structp +png_ptr, png_infop info_ptr)); +#endif + +/* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ +extern PNG_EXPORT(png_int_32, png_get_x_offset_pixels) PNGARG((png_structp +png_ptr, png_infop info_ptr)); +extern PNG_EXPORT(png_int_32, png_get_y_offset_pixels) PNGARG((png_structp +png_ptr, png_infop info_ptr)); +extern PNG_EXPORT(png_int_32, png_get_x_offset_microns) PNGARG((png_structp +png_ptr, png_infop info_ptr)); +extern PNG_EXPORT(png_int_32, png_get_y_offset_microns) PNGARG((png_structp +png_ptr, png_infop info_ptr)); + +#endif /* PNG_EASY_ACCESS_SUPPORTED */ + +/* Returns pointer to signature string read from PNG header */ +extern PNG_EXPORT(png_bytep,png_get_signature) PNGARG((png_structp png_ptr, +png_infop info_ptr)); + +#ifdef PNG_bKGD_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_bKGD) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_color_16p *background)); +#endif + +#ifdef PNG_bKGD_SUPPORTED +extern PNG_EXPORT(void,png_set_bKGD) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_color_16p background)); +#endif + +#ifdef PNG_cHRM_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_cHRM) PNGARG((png_structp png_ptr, + png_infop info_ptr, double *white_x, double *white_y, double *red_x, + double *red_y, double *green_x, double *green_y, double *blue_x, + double *blue_y)); +#endif +#ifdef PNG_FIXED_POINT_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_cHRM_fixed) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_fixed_point *int_white_x, png_fixed_point + *int_white_y, png_fixed_point *int_red_x, png_fixed_point *int_red_y, + png_fixed_point *int_green_x, png_fixed_point *int_green_y, png_fixed_point + *int_blue_x, png_fixed_point *int_blue_y)); +#endif +#endif + +#ifdef PNG_cHRM_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED +extern PNG_EXPORT(void,png_set_cHRM) PNGARG((png_structp png_ptr, + png_infop info_ptr, double white_x, double white_y, double red_x, + double red_y, double green_x, double green_y, double blue_x, double blue_y)); +#endif +#ifdef PNG_FIXED_POINT_SUPPORTED +extern PNG_EXPORT(void,png_set_cHRM_fixed) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_fixed_point int_white_x, png_fixed_point int_white_y, + png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point + int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, + png_fixed_point int_blue_y)); +#endif +#endif + +#ifdef PNG_gAMA_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_gAMA) PNGARG((png_structp png_ptr, + png_infop info_ptr, double *file_gamma)); +#endif +extern PNG_EXPORT(png_uint_32,png_get_gAMA_fixed) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_fixed_point *int_file_gamma)); +#endif + +#ifdef PNG_gAMA_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED +extern PNG_EXPORT(void,png_set_gAMA) PNGARG((png_structp png_ptr, + png_infop info_ptr, double file_gamma)); +#endif +extern PNG_EXPORT(void,png_set_gAMA_fixed) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_fixed_point int_file_gamma)); +#endif + +#ifdef PNG_hIST_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_hIST) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_16p *hist)); +#endif + +#ifdef PNG_hIST_SUPPORTED +extern PNG_EXPORT(void,png_set_hIST) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_16p hist)); +#endif + +extern PNG_EXPORT(png_uint_32,png_get_IHDR) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 *width, png_uint_32 *height, + int *bit_depth, int *color_type, int *interlace_method, + int *compression_method, int *filter_method)); + +extern PNG_EXPORT(void,png_set_IHDR) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, + int color_type, int interlace_method, int compression_method, + int filter_method)); + +#ifdef PNG_oFFs_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_oFFs) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_int_32 *offset_x, png_int_32 *offset_y, + int *unit_type)); +#endif + +#ifdef PNG_oFFs_SUPPORTED +extern PNG_EXPORT(void,png_set_oFFs) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_int_32 offset_x, png_int_32 offset_y, + int unit_type)); +#endif + +#ifdef PNG_pCAL_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_pCAL) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1, + int *type, int *nparams, png_charp *units, png_charpp *params)); +#endif + +#ifdef PNG_pCAL_SUPPORTED +extern PNG_EXPORT(void,png_set_pCAL) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1, + int type, int nparams, png_charp units, png_charpp params)); +#endif + +#ifdef PNG_pHYs_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); +#endif + +#ifdef PNG_pHYs_SUPPORTED +extern PNG_EXPORT(void,png_set_pHYs) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type)); +#endif + +extern PNG_EXPORT(png_uint_32,png_get_PLTE) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_colorp *palette, int *num_palette)); + +extern PNG_EXPORT(void,png_set_PLTE) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_colorp palette, int num_palette)); + +#ifdef PNG_sBIT_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_sBIT) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_color_8p *sig_bit)); +#endif + +#ifdef PNG_sBIT_SUPPORTED +extern PNG_EXPORT(void,png_set_sBIT) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_color_8p sig_bit)); +#endif + +#ifdef PNG_sRGB_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_sRGB) PNGARG((png_structp png_ptr, + png_infop info_ptr, int *intent)); +#endif + +#ifdef PNG_sRGB_SUPPORTED +extern PNG_EXPORT(void,png_set_sRGB) PNGARG((png_structp png_ptr, + png_infop info_ptr, int intent)); +extern PNG_EXPORT(void,png_set_sRGB_gAMA_and_cHRM) PNGARG((png_structp png_ptr, + png_infop info_ptr, int intent)); +#endif + +#ifdef PNG_iCCP_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_iCCP) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_charpp name, int *compression_type, + png_charpp profile, png_uint_32 *proflen)); + /* Note to maintainer: profile should be png_bytepp */ +#endif + +#ifdef PNG_iCCP_SUPPORTED +extern PNG_EXPORT(void,png_set_iCCP) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_charp name, int compression_type, + png_charp profile, png_uint_32 proflen)); + /* Note to maintainer: profile should be png_bytep */ +#endif + +#ifdef PNG_sPLT_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_sPLT) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_sPLT_tpp entries)); +#endif + +#ifdef PNG_sPLT_SUPPORTED +extern PNG_EXPORT(void,png_set_sPLT) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_sPLT_tp entries, int nentries)); +#endif + +#ifdef PNG_TEXT_SUPPORTED +/* png_get_text also returns the number of text chunks in *num_text */ +extern PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_textp *text_ptr, int *num_text)); +#endif + +/* + * Note while png_set_text() will accept a structure whose text, + * language, and translated keywords are NULL pointers, the structure + * returned by png_get_text will always contain regular + * zero-terminated C strings. They might be empty strings but + * they will never be NULL pointers. + */ + +#ifdef PNG_TEXT_SUPPORTED +extern PNG_EXPORT(void,png_set_text) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_textp text_ptr, int num_text)); +#endif + +#ifdef PNG_tIME_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_tIME) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_timep *mod_time)); +#endif + +#ifdef PNG_tIME_SUPPORTED +extern PNG_EXPORT(void,png_set_tIME) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_timep mod_time)); +#endif + +#ifdef PNG_tRNS_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_tRNS) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_bytep *trans, int *num_trans, + png_color_16p *trans_values)); +#endif + +#ifdef PNG_tRNS_SUPPORTED +extern PNG_EXPORT(void,png_set_tRNS) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_bytep trans, int num_trans, + png_color_16p trans_values)); +#endif + +#ifdef PNG_tRNS_SUPPORTED +#endif + +#ifdef PNG_sCAL_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_sCAL) PNGARG((png_structp png_ptr, + png_infop info_ptr, int *unit, double *width, double *height)); +#else +#ifdef PNG_FIXED_POINT_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_get_sCAL_s) PNGARG((png_structp png_ptr, + png_infop info_ptr, int *unit, png_charpp swidth, png_charpp sheight)); +#endif +#endif +#endif /* PNG_sCAL_SUPPORTED */ + +#ifdef PNG_sCAL_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED +extern PNG_EXPORT(void,png_set_sCAL) PNGARG((png_structp png_ptr, + png_infop info_ptr, int unit, double width, double height)); +#else +#ifdef PNG_FIXED_POINT_SUPPORTED +extern PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr, + png_infop info_ptr, int unit, png_charp swidth, png_charp sheight)); +#endif +#endif +#endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */ + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +/* Provide a list of chunks and how they are to be handled, if the built-in + handling or default unknown chunk handling is not desired. Any chunks not + listed will be handled in the default manner. The IHDR and IEND chunks + must not be listed. + keep = 0: follow default behaviour + = 1: do not keep + = 2: keep only if safe-to-copy + = 3: keep even if unsafe-to-copy +*/ +extern PNG_EXPORT(void, png_set_keep_unknown_chunks) PNGARG((png_structp + png_ptr, int keep, png_bytep chunk_list, int num_chunks)); +PNG_EXPORT(int,png_handle_as_unknown) PNGARG((png_structp png_ptr, png_bytep + chunk_name)); +#endif +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED +extern PNG_EXPORT(void, png_set_unknown_chunks) PNGARG((png_structp png_ptr, + png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)); +extern PNG_EXPORT(void, png_set_unknown_chunk_location) + PNGARG((png_structp png_ptr, png_infop info_ptr, int chunk, int location)); +extern PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp + png_ptr, png_infop info_ptr, png_unknown_chunkpp entries)); +#endif + +/* Png_free_data() will turn off the "valid" flag for anything it frees. + * If you need to turn it off for a chunk that your application has freed, + * you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); + */ +extern PNG_EXPORT(void, png_set_invalid) PNGARG((png_structp png_ptr, + png_infop info_ptr, int mask)); + +#ifdef PNG_INFO_IMAGE_SUPPORTED +/* The "params" pointer is currently not used and is for future expansion. */ +extern PNG_EXPORT(void, png_read_png) PNGARG((png_structp png_ptr, + png_infop info_ptr, + int transforms, + png_voidp params)); +extern PNG_EXPORT(void, png_write_png) PNGARG((png_structp png_ptr, + png_infop info_ptr, + int transforms, + png_voidp params)); +#endif + +/* Define PNG_DEBUG at compile time for debugging information. Higher + * numbers for PNG_DEBUG mean more debugging information. This has + * only been added since version 0.95 so it is not implemented throughout + * libpng yet, but more support will be added as needed. + */ +#ifdef PNG_DEBUG +#if (PNG_DEBUG > 0) +#if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER) +#include <crtdbg.h> +#if (PNG_DEBUG > 1) +#ifndef _DEBUG +# define _DEBUG +#endif +#ifndef png_debug +#define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE) +#endif +#ifndef png_debug1 +#define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1) +#endif +#ifndef png_debug2 +#define png_debug2(l,m,p1,p2) _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2) +#endif +#endif +#else /* PNG_DEBUG_FILE || !_MSC_VER */ +#ifndef PNG_DEBUG_FILE +#define PNG_DEBUG_FILE stderr +#endif /* PNG_DEBUG_FILE */ + +#if (PNG_DEBUG > 1) +/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on non-ISO + * compilers. + */ +# ifdef __STDC__ +# ifndef png_debug +# define png_debug(l,m) \ + { \ + int num_tabs=l; \ + fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \ + } +# endif +# ifndef png_debug1 +# define png_debug1(l,m,p1) \ + { \ + int num_tabs=l; \ + fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \ + } +# endif +# ifndef png_debug2 +# define png_debug2(l,m,p1,p2) \ + { \ + int num_tabs=l; \ + fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \ + } +# endif +# else /* __STDC __ */ +# ifndef png_debug +# define png_debug(l,m) \ + { \ + int num_tabs=l; \ + char format[256]; \ + snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ + m,PNG_STRING_NEWLINE); \ + fprintf(PNG_DEBUG_FILE,format); \ + } +# endif +# ifndef png_debug1 +# define png_debug1(l,m,p1) \ + { \ + int num_tabs=l; \ + char format[256]; \ + snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ + m,PNG_STRING_NEWLINE); \ + fprintf(PNG_DEBUG_FILE,format,p1); \ + } +# endif +# ifndef png_debug2 +# define png_debug2(l,m,p1,p2) \ + { \ + int num_tabs=l; \ + char format[256]; \ + snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \ + (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \ + m,PNG_STRING_NEWLINE); \ + fprintf(PNG_DEBUG_FILE,format,p1,p2); \ + } +# endif +# endif /* __STDC __ */ +#endif /* (PNG_DEBUG > 1) */ + +#endif /* _MSC_VER */ +#endif /* (PNG_DEBUG > 0) */ +#endif /* PNG_DEBUG */ +#ifndef png_debug +#define png_debug(l, m) +#endif +#ifndef png_debug1 +#define png_debug1(l, m, p1) +#endif +#ifndef png_debug2 +#define png_debug2(l, m, p1, p2) +#endif + +extern PNG_EXPORT(png_charp,png_get_copyright) PNGARG((png_structp png_ptr)); +extern PNG_EXPORT(png_charp,png_get_header_ver) PNGARG((png_structp png_ptr)); +extern PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp png_ptr)); +extern PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr)); + +#ifdef PNG_MNG_FEATURES_SUPPORTED +extern PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp + png_ptr, png_uint_32 mng_features_permitted)); +#endif + +/* For use in png_set_keep_unknown, added to version 1.2.6 */ +#define PNG_HANDLE_CHUNK_AS_DEFAULT 0 +#define PNG_HANDLE_CHUNK_NEVER 1 +#define PNG_HANDLE_CHUNK_IF_SAFE 2 +#define PNG_HANDLE_CHUNK_ALWAYS 3 + +/* Added to version 1.2.0 */ +#ifdef PNG_ASSEMBLER_CODE_SUPPORTED +#ifdef PNG_MMX_CODE_SUPPORTED +#define PNG_ASM_FLAG_MMX_SUPPORT_COMPILED 0x01 /* not user-settable */ +#define PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU 0x02 /* not user-settable */ +#define PNG_ASM_FLAG_MMX_READ_COMBINE_ROW 0x04 +#define PNG_ASM_FLAG_MMX_READ_INTERLACE 0x08 +#define PNG_ASM_FLAG_MMX_READ_FILTER_SUB 0x10 +#define PNG_ASM_FLAG_MMX_READ_FILTER_UP 0x20 +#define PNG_ASM_FLAG_MMX_READ_FILTER_AVG 0x40 +#define PNG_ASM_FLAG_MMX_READ_FILTER_PAETH 0x80 +#define PNG_ASM_FLAGS_INITIALIZED 0x80000000 /* not user-settable */ + +#define PNG_MMX_READ_FLAGS ( PNG_ASM_FLAG_MMX_READ_COMBINE_ROW \ + | PNG_ASM_FLAG_MMX_READ_INTERLACE \ + | PNG_ASM_FLAG_MMX_READ_FILTER_SUB \ + | PNG_ASM_FLAG_MMX_READ_FILTER_UP \ + | PNG_ASM_FLAG_MMX_READ_FILTER_AVG \ + | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ) +#define PNG_MMX_WRITE_FLAGS ( 0 ) + +#define PNG_MMX_FLAGS ( PNG_ASM_FLAG_MMX_SUPPORT_COMPILED \ + | PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU \ + | PNG_MMX_READ_FLAGS \ + | PNG_MMX_WRITE_FLAGS ) + +#define PNG_SELECT_READ 1 +#define PNG_SELECT_WRITE 2 +#endif /* PNG_MMX_CODE_SUPPORTED */ + +#ifndef PNG_1_0_X +/* pngget.c */ +extern PNG_EXPORT(png_uint_32,png_get_mmx_flagmask) + PNGARG((int flag_select, int *compilerID)); + +/* pngget.c */ +extern PNG_EXPORT(png_uint_32,png_get_asm_flagmask) + PNGARG((int flag_select)); + +/* pngget.c */ +extern PNG_EXPORT(png_uint_32,png_get_asm_flags) + PNGARG((png_structp png_ptr)); + +/* pngget.c */ +extern PNG_EXPORT(png_byte,png_get_mmx_bitdepth_threshold) + PNGARG((png_structp png_ptr)); + +/* pngget.c */ +extern PNG_EXPORT(png_uint_32,png_get_mmx_rowbytes_threshold) + PNGARG((png_structp png_ptr)); + +/* pngset.c */ +extern PNG_EXPORT(void,png_set_asm_flags) + PNGARG((png_structp png_ptr, png_uint_32 asm_flags)); + +/* pngset.c */ +extern PNG_EXPORT(void,png_set_mmx_thresholds) + PNGARG((png_structp png_ptr, png_byte mmx_bitdepth_threshold, + png_uint_32 mmx_rowbytes_threshold)); + +#endif /* PNG_1_0_X */ + +#ifndef PNG_1_0_X +/* png.c, pnggccrd.c, or pngvcrd.c */ +extern PNG_EXPORT(int,png_mmx_support) PNGARG((void)); +#endif /* PNG_1_0_X */ +#endif /* PNG_ASSEMBLER_CODE_SUPPORTED */ + +/* Strip the prepended error numbers ("#nnn ") from error and warning + * messages before passing them to the error or warning handler. + */ +#ifdef PNG_ERROR_NUMBERS_SUPPORTED +extern PNG_EXPORT(void,png_set_strip_error_numbers) PNGARG((png_structp + png_ptr, png_uint_32 strip_mode)); +#endif + +/* Added at libpng-1.2.6 */ +#ifdef PNG_SET_USER_LIMITS_SUPPORTED +extern PNG_EXPORT(void,png_set_user_limits) PNGARG((png_structp + png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max)); +extern PNG_EXPORT(png_uint_32,png_get_user_width_max) PNGARG((png_structp + png_ptr)); +extern PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp + png_ptr)); +#endif +/* Maintainer: Put new public prototypes here ^, in libpng.3, and in + * project defs + */ + +#ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED +/* With these routines we avoid an integer divide, which will be slower on + * most machines. However, it does take more operations than the corresponding + * divide method, so it may be slower on a few RISC systems. There are two + * shifts (by 8 or 16 bits) and an addition, versus a single integer divide. + * + * Note that the rounding factors are NOT supposed to be the same! 128 and + * 32768 are correct for the NODIV code; 127 and 32767 are correct for the + * standard method. + * + * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ] + */ + + /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ + +# define png_composite(composite, fg, alpha, bg) \ + { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) * (png_uint_16)(alpha) \ + + (png_uint_16)(bg)*(png_uint_16)(255 - \ + (png_uint_16)(alpha)) + (png_uint_16)128); \ + (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } + +# define png_composite_16(composite, fg, alpha, bg) \ + { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) * (png_uint_32)(alpha) \ + + (png_uint_32)(bg)*(png_uint_32)(65535L - \ + (png_uint_32)(alpha)) + (png_uint_32)32768L); \ + (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } + +#else /* Standard method using integer division */ + +# define png_composite(composite, fg, alpha, bg) \ + (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ + (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ + (png_uint_16)127) / 255) + +# define png_composite_16(composite, fg, alpha, bg) \ + (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ + (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \ + (png_uint_32)32767) / (png_uint_32)65535L) + +#endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ + +/* Inline macros to do direct reads of bytes from the input buffer. These + * require that you are using an architecture that uses PNG byte ordering + * (MSB first) and supports unaligned data storage. I think that PowerPC + * in big-endian mode and 680x0 are the only ones that will support this. + * The x86 line of processors definitely do not. The png_get_int_32() + * routine also assumes we are using two's complement format for negative + * values, which is almost certainly true. + */ +#ifdef PNG_READ_BIG_ENDIAN_SUPPORTED +# define png_get_uint_32(buf) ( *((png_uint_32p) (buf))) +# define png_get_uint_16(buf) ( *((png_uint_16p) (buf))) +# define png_get_int_32(buf) ( *((png_int_32p) (buf))) +#else +extern PNG_EXPORT(png_uint_32,png_get_uint_32) PNGARG((png_bytep buf)); +extern PNG_EXPORT(png_uint_16,png_get_uint_16) PNGARG((png_bytep buf)); +extern PNG_EXPORT(png_int_32,png_get_int_32) PNGARG((png_bytep buf)); +#endif /* !PNG_READ_BIG_ENDIAN_SUPPORTED */ +extern PNG_EXPORT(png_uint_32,png_get_uint_31) + PNGARG((png_structp png_ptr, png_bytep buf)); +/* No png_get_int_16 -- may be added if there's a real need for it. */ + +/* Place a 32-bit number into a buffer in PNG byte order (big-endian). + */ +extern PNG_EXPORT(void,png_save_uint_32) + PNGARG((png_bytep buf, png_uint_32 i)); +extern PNG_EXPORT(void,png_save_int_32) + PNGARG((png_bytep buf, png_int_32 i)); + +/* Place a 16-bit number into a buffer in PNG byte order. + * The parameter is declared unsigned int, not png_uint_16, + * just to avoid potential problems on pre-ANSI C compilers. + */ +extern PNG_EXPORT(void,png_save_uint_16) + PNGARG((png_bytep buf, unsigned int i)); +/* No png_save_int_16 -- may be added if there's a real need for it. */ + +/* ************************************************************************* */ + +/* These next functions are used internally in the code. They generally + * shouldn't be used unless you are writing code to add or replace some + * functionality in libpng. More information about most functions can + * be found in the files where the functions are located. + */ + + +/* Various modes of operation, that are visible to applications because + * they are used for unknown chunk location. + */ +#define PNG_HAVE_IHDR 0x01 +#define PNG_HAVE_PLTE 0x02 +#define PNG_HAVE_IDAT 0x04 +#define PNG_AFTER_IDAT 0x08 /* Have complete zlib datastream */ +#define PNG_HAVE_IEND 0x10 + +#ifdef PNG_INTERNAL + +/* More modes of operation. Note that after an init, mode is set to + * zero automatically when the structure is created. + */ +#define PNG_HAVE_gAMA 0x20 +#define PNG_HAVE_cHRM 0x40 +#define PNG_HAVE_sRGB 0x80 +#define PNG_HAVE_CHUNK_HEADER 0x100 +#define PNG_WROTE_tIME 0x200 +#define PNG_WROTE_INFO_BEFORE_PLTE 0x400 +#define PNG_BACKGROUND_IS_GRAY 0x800 +#define PNG_HAVE_PNG_SIGNATURE 0x1000 +#define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ + +/* Flags for the transformations the PNG library does on the image data */ +#define PNG_BGR 0x0001 +#define PNG_INTERLACE 0x0002 +#define PNG_PACK 0x0004 +#define PNG_SHIFT 0x0008 +#define PNG_SWAP_BYTES 0x0010 +#define PNG_INVERT_MONO 0x0020 +#define PNG_DITHER 0x0040 +#define PNG_BACKGROUND 0x0080 +#define PNG_BACKGROUND_EXPAND 0x0100 + /* 0x0200 unused */ +#define PNG_16_TO_8 0x0400 +#define PNG_RGBA 0x0800 +#define PNG_EXPAND 0x1000 +#define PNG_GAMMA 0x2000 +#define PNG_GRAY_TO_RGB 0x4000 +#define PNG_FILLER 0x8000L +#define PNG_PACKSWAP 0x10000L +#define PNG_SWAP_ALPHA 0x20000L +#define PNG_STRIP_ALPHA 0x40000L +#define PNG_INVERT_ALPHA 0x80000L +#define PNG_USER_TRANSFORM 0x100000L +#define PNG_RGB_TO_GRAY_ERR 0x200000L +#define PNG_RGB_TO_GRAY_WARN 0x400000L +#define PNG_RGB_TO_GRAY 0x600000L /* two bits, RGB_TO_GRAY_ERR|WARN */ + /* 0x800000L Unused */ +#define PNG_ADD_ALPHA 0x1000000L /* Added to libpng-1.2.7 */ +#define PNG_EXPAND_tRNS 0x2000000L /* Added to libpng-1.2.9 */ +#define PNG_PREMULTIPLY_ALPHA 0x4000000L /* Added to libpng-1.2.41 */ + /* by volker */ + /* 0x8000000L unused */ + /* 0x10000000L unused */ + /* 0x20000000L unused */ + /* 0x40000000L unused */ + +/* Flags for png_create_struct */ +#define PNG_STRUCT_PNG 0x0001 +#define PNG_STRUCT_INFO 0x0002 + +/* Scaling factor for filter heuristic weighting calculations */ +#define PNG_WEIGHT_SHIFT 8 +#define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT)) +#define PNG_COST_SHIFT 3 +#define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT)) + +/* Flags for the png_ptr->flags rather than declaring a byte for each one */ +#define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001 +#define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002 +#define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004 +#define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008 +#define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010 +#define PNG_FLAG_ZLIB_FINISHED 0x0020 +#define PNG_FLAG_ROW_INIT 0x0040 +#define PNG_FLAG_FILLER_AFTER 0x0080 +#define PNG_FLAG_CRC_ANCILLARY_USE 0x0100 +#define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200 +#define PNG_FLAG_CRC_CRITICAL_USE 0x0400 +#define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800 +#define PNG_FLAG_FREE_PLTE 0x1000 +#define PNG_FLAG_FREE_TRNS 0x2000 +#define PNG_FLAG_FREE_HIST 0x4000 +#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000L +#define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000L +#define PNG_FLAG_LIBRARY_MISMATCH 0x20000L +#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000L +#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000L +#define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000L +#define PNG_FLAG_ADD_ALPHA 0x200000L /* Added to libpng-1.2.8 */ +#define PNG_FLAG_STRIP_ALPHA 0x400000L /* Added to libpng-1.2.8 */ + /* 0x800000L unused */ + /* 0x1000000L unused */ + /* 0x2000000L unused */ + /* 0x4000000L unused */ + /* 0x8000000L unused */ + /* 0x10000000L unused */ + /* 0x20000000L unused */ + /* 0x40000000L unused */ + +#define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \ + PNG_FLAG_CRC_ANCILLARY_NOWARN) + +#define PNG_FLAG_CRC_CRITICAL_MASK (PNG_FLAG_CRC_CRITICAL_USE | \ + PNG_FLAG_CRC_CRITICAL_IGNORE) + +#define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \ + PNG_FLAG_CRC_CRITICAL_MASK) + +/* Save typing and make code easier to understand */ + +#define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \ + abs((int)((c1).green) - (int)((c2).green)) + \ + abs((int)((c1).blue) - (int)((c2).blue))) + +/* Added to libpng-1.2.6 JB */ +#define PNG_ROWBYTES(pixel_bits, width) \ + ((pixel_bits) >= 8 ? \ + ((width) * (((png_uint_32)(pixel_bits)) >> 3)) : \ + (( ((width) * ((png_uint_32)(pixel_bits))) + 7) >> 3) ) + +/* PNG_OUT_OF_RANGE returns true if value is outside the range + * ideal-delta..ideal+delta. Each argument is evaluated twice. + * "ideal" and "delta" should be constants, normally simple + * integers, "value" a variable. Added to libpng-1.2.6 JB + */ +#define PNG_OUT_OF_RANGE(value, ideal, delta) \ + ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) ) + +/* Variables declared in png.c - only it needs to define PNG_NO_EXTERN */ +#if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN) +/* Place to hold the signature string for a PNG file. */ +#ifdef PNG_USE_GLOBAL_ARRAYS + PNG_EXPORT_VAR (PNG_CONST png_byte FARDATA) png_sig[8]; +#else +#endif +#endif /* PNG_NO_EXTERN */ + +/* Constant strings for known chunk types. If you need to add a chunk, + * define the name here, and add an invocation of the macro in png.c and + * wherever it's needed. + */ +#define PNG_IHDR png_byte png_IHDR[5] = { 73, 72, 68, 82, '\0'} +#define PNG_IDAT png_byte png_IDAT[5] = { 73, 68, 65, 84, '\0'} +#define PNG_IEND png_byte png_IEND[5] = { 73, 69, 78, 68, '\0'} +#define PNG_PLTE png_byte png_PLTE[5] = { 80, 76, 84, 69, '\0'} +#define PNG_bKGD png_byte png_bKGD[5] = { 98, 75, 71, 68, '\0'} +#define PNG_cHRM png_byte png_cHRM[5] = { 99, 72, 82, 77, '\0'} +#define PNG_gAMA png_byte png_gAMA[5] = {103, 65, 77, 65, '\0'} +#define PNG_hIST png_byte png_hIST[5] = {104, 73, 83, 84, '\0'} +#define PNG_iCCP png_byte png_iCCP[5] = {105, 67, 67, 80, '\0'} +#define PNG_iTXt png_byte png_iTXt[5] = {105, 84, 88, 116, '\0'} +#define PNG_oFFs png_byte png_oFFs[5] = {111, 70, 70, 115, '\0'} +#define PNG_pCAL png_byte png_pCAL[5] = {112, 67, 65, 76, '\0'} +#define PNG_sCAL png_byte png_sCAL[5] = {115, 67, 65, 76, '\0'} +#define PNG_pHYs png_byte png_pHYs[5] = {112, 72, 89, 115, '\0'} +#define PNG_sBIT png_byte png_sBIT[5] = {115, 66, 73, 84, '\0'} +#define PNG_sPLT png_byte png_sPLT[5] = {115, 80, 76, 84, '\0'} +#define PNG_sRGB png_byte png_sRGB[5] = {115, 82, 71, 66, '\0'} +#define PNG_tEXt png_byte png_tEXt[5] = {116, 69, 88, 116, '\0'} +#define PNG_tIME png_byte png_tIME[5] = {116, 73, 77, 69, '\0'} +#define PNG_tRNS png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'} +#define PNG_zTXt png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'} + +#ifdef PNG_USE_GLOBAL_ARRAYS +PNG_EXPORT_VAR (png_byte FARDATA) png_IHDR[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_IDAT[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_IEND[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_PLTE[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_bKGD[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_cHRM[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_gAMA[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_hIST[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_iCCP[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_iTXt[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_oFFs[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_pCAL[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_sCAL[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_pHYs[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_sBIT[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_sPLT[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_sRGB[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_tEXt[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_tIME[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_tRNS[5]; +PNG_EXPORT_VAR (png_byte FARDATA) png_zTXt[5]; +#endif /* PNG_USE_GLOBAL_ARRAYS */ + +#if defined(PNG_1_0_X) || defined (PNG_1_2_X) +/* Initialize png_ptr struct for reading, and allocate any other memory. + * (old interface - DEPRECATED - use png_create_read_struct instead). + */ +extern PNG_EXPORT(void,png_read_init) PNGARG((png_structp png_ptr)) + PNG_DEPRECATED; +#undef png_read_init +#define png_read_init(png_ptr) png_read_init_3(&png_ptr, \ + PNG_LIBPNG_VER_STRING, png_sizeof(png_struct)); +#endif + +extern PNG_EXPORT(void,png_read_init_3) PNGARG((png_structpp ptr_ptr, + png_const_charp user_png_ver, png_size_t png_struct_size)); +#if defined(PNG_1_0_X) || defined (PNG_1_2_X) +extern PNG_EXPORT(void,png_read_init_2) PNGARG((png_structp png_ptr, + png_const_charp user_png_ver, png_size_t png_struct_size, png_size_t + png_info_size)); +#endif + +#if defined(PNG_1_0_X) || defined (PNG_1_2_X) +/* Initialize png_ptr struct for writing, and allocate any other memory. + * (old interface - DEPRECATED - use png_create_write_struct instead). + */ +extern PNG_EXPORT(void,png_write_init) PNGARG((png_structp png_ptr)) + PNG_DEPRECATED; +#undef png_write_init +#define png_write_init(png_ptr) png_write_init_3(&png_ptr, \ + PNG_LIBPNG_VER_STRING, png_sizeof(png_struct)); +#endif + +extern PNG_EXPORT(void,png_write_init_3) PNGARG((png_structpp ptr_ptr, + png_const_charp user_png_ver, png_size_t png_struct_size)); +extern PNG_EXPORT(void,png_write_init_2) PNGARG((png_structp png_ptr, + png_const_charp user_png_ver, png_size_t png_struct_size, png_size_t + png_info_size)); + +/* Allocate memory for an internal libpng struct */ +PNG_EXTERN png_voidp png_create_struct PNGARG((int type)) PNG_PRIVATE; + +/* Free memory from internal libpng struct */ +PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr)) PNG_PRIVATE; + +PNG_EXTERN png_voidp png_create_struct_2 PNGARG((int type, png_malloc_ptr + malloc_fn, png_voidp mem_ptr)) PNG_PRIVATE; +PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr, + png_free_ptr free_fn, png_voidp mem_ptr)) PNG_PRIVATE; + +/* Free any memory that info_ptr points to and reset struct. */ +PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr, + png_infop info_ptr)) PNG_PRIVATE; + +#ifndef PNG_1_0_X +/* Function to allocate memory for zlib. */ +PNG_EXTERN voidpf png_zalloc PNGARG((voidpf png_ptr, uInt items, + uInt size)) PNG_PRIVATE; + +/* Function to free memory for zlib */ +PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr)) PNG_PRIVATE; + +#ifdef PNG_SIZE_T +/* Function to convert a sizeof an item to png_sizeof item */ + PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size)) + PNG_PRIVATE; +#endif + +/* Next four functions are used internally as callbacks. PNGAPI is required + * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3. + */ + +PNG_EXTERN void PNGAPI png_default_read_data PNGARG((png_structp png_ptr, + png_bytep data, png_size_t length)) PNG_PRIVATE; + +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED +PNG_EXTERN void PNGAPI png_push_fill_buffer PNGARG((png_structp png_ptr, + png_bytep buffer, png_size_t length)) PNG_PRIVATE; +#endif + +PNG_EXTERN void PNGAPI png_default_write_data PNGARG((png_structp png_ptr, + png_bytep data, png_size_t length)) PNG_PRIVATE; + +#ifdef PNG_WRITE_FLUSH_SUPPORTED +#ifdef PNG_STDIO_SUPPORTED +PNG_EXTERN void PNGAPI png_default_flush PNGARG((png_structp png_ptr)) + PNG_PRIVATE; +#endif +#endif +#else /* PNG_1_0_X */ +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED +PNG_EXTERN void png_push_fill_buffer PNGARG((png_structp png_ptr, + png_bytep buffer, png_size_t length)) PNG_PRIVATE; +#endif +#endif /* PNG_1_0_X */ + +/* Reset the CRC variable */ +PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr)) PNG_PRIVATE; + +/* Write the "data" buffer to whatever output you are using. */ +PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, png_bytep data, + png_size_t length)) PNG_PRIVATE; + +/* Read data from whatever input you are using into the "data" buffer */ +PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data, + png_size_t length)) PNG_PRIVATE; + +/* Read bytes into buf, and update png_ptr->crc */ +PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf, + png_size_t length)) PNG_PRIVATE; + +/* Decompress data in a chunk that uses compression */ +#if defined(PNG_zTXt_SUPPORTED) || defined(PNG_iTXt_SUPPORTED) || \ + defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) +PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr, + int comp_type, png_size_t chunklength, + png_size_t prefix_length, png_size_t *data_length)) PNG_PRIVATE; +#endif + +/* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */ +PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip) + PNG_PRIVATE); + +/* Read the CRC from the file and compare it to the libpng calculated CRC */ +PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr)) PNG_PRIVATE; + +/* Calculate the CRC over a section of data. Note that we are only + * passing a maximum of 64K on systems that have this as a memory limit, + * since this is the maximum buffer size we can specify. + */ +PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, png_bytep ptr, + png_size_t length)) PNG_PRIVATE; + +#ifdef PNG_WRITE_FLUSH_SUPPORTED +PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)) PNG_PRIVATE; +#endif + +/* Simple function to write the signature */ +PNG_EXTERN void png_write_sig PNGARG((png_structp png_ptr)) PNG_PRIVATE; + +/* Write various chunks */ + +/* Write the IHDR chunk, and update the png_struct with the necessary + * information. + */ +PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width, + png_uint_32 height, + int bit_depth, int color_type, int compression_method, int filter_method, + int interlace_method)) PNG_PRIVATE; + +PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, png_colorp palette, + png_uint_32 num_pal)) PNG_PRIVATE; + +PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data, + png_size_t length)) PNG_PRIVATE; + +PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr)) PNG_PRIVATE; + +#ifdef PNG_WRITE_gAMA_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED +PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma)) + PNG_PRIVATE; +#endif +#ifdef PNG_FIXED_POINT_SUPPORTED +PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr, + png_fixed_point file_gamma)) PNG_PRIVATE; +#endif +#endif + +#ifdef PNG_WRITE_sBIT_SUPPORTED +PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, png_color_8p sbit, + int color_type)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_cHRM_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED +PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr, + double white_x, double white_y, + double red_x, double red_y, double green_x, double green_y, + double blue_x, double blue_y)) PNG_PRIVATE; +#endif +#ifdef PNG_FIXED_POINT_SUPPORTED +PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr, + png_fixed_point int_white_x, png_fixed_point int_white_y, + png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point + int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, + png_fixed_point int_blue_y)) PNG_PRIVATE; +#endif +#endif + +#ifdef PNG_WRITE_sRGB_SUPPORTED +PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr, + int intent)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_iCCP_SUPPORTED +PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr, + png_charp name, int compression_type, + png_charp profile, int proflen)) PNG_PRIVATE; + /* Note to maintainer: profile should be png_bytep */ +#endif + +#ifdef PNG_WRITE_sPLT_SUPPORTED +PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr, + png_sPLT_tp palette)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_tRNS_SUPPORTED +PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, png_bytep trans, + png_color_16p values, int number, int color_type)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_bKGD_SUPPORTED +PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr, + png_color_16p values, int color_type)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_hIST_SUPPORTED +PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, png_uint_16p hist, + int num_hist)) PNG_PRIVATE; +#endif + +#if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ + defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) +PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr, + png_charp key, png_charpp new_key)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_tEXt_SUPPORTED +PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_charp key, + png_charp text, png_size_t text_len)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_zTXt_SUPPORTED +PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_charp key, + png_charp text, png_size_t text_len, int compression)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_iTXt_SUPPORTED +PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr, + int compression, png_charp key, png_charp lang, png_charp lang_key, + png_charp text)) PNG_PRIVATE; +#endif + +#ifdef PNG_TEXT_SUPPORTED /* Added at version 1.0.14 and 1.2.4 */ +PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr, + png_infop info_ptr, png_textp text_ptr, int num_text)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_oFFs_SUPPORTED +PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr, + png_int_32 x_offset, png_int_32 y_offset, int unit_type)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_pCAL_SUPPORTED +PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose, + png_int_32 X0, png_int_32 X1, int type, int nparams, + png_charp units, png_charpp params)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_pHYs_SUPPORTED +PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr, + png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, + int unit_type)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_tIME_SUPPORTED +PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr, + png_timep mod_time)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_sCAL_SUPPORTED +#if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO) +PNG_EXTERN void png_write_sCAL PNGARG((png_structp png_ptr, + int unit, double width, double height)) PNG_PRIVATE; +#else +#ifdef PNG_FIXED_POINT_SUPPORTED +PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr, + int unit, png_charp width, png_charp height)) PNG_PRIVATE; +#endif +#endif +#endif + +/* Called when finished processing a row of data */ +PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)) PNG_PRIVATE; + +/* Internal use only. Called before first row of data */ +PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr)) PNG_PRIVATE; + +#ifdef PNG_READ_GAMMA_SUPPORTED +PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr)) PNG_PRIVATE; +#endif + +/* Combine a row of data, dealing with alpha, etc. if requested */ +PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row, + int mask)) PNG_PRIVATE; + +#ifdef PNG_READ_INTERLACING_SUPPORTED +/* Expand an interlaced row */ +/* OLD pre-1.0.9 interface: +PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info, + png_bytep row, int pass, png_uint_32 transformations)) PNG_PRIVATE; + */ +PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr)) PNG_PRIVATE; +#endif + +/* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */ + +#ifdef PNG_WRITE_INTERLACING_SUPPORTED +/* Grab pixels out of a row for an interlaced pass */ +PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info, + png_bytep row, int pass)) PNG_PRIVATE; +#endif + +/* Unfilter a row */ +PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr, + png_row_infop row_info, png_bytep row, png_bytep prev_row, + int filter)) PNG_PRIVATE; + +/* Choose the best filter to use and filter the row data */ +PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr, + png_row_infop row_info)) PNG_PRIVATE; + +/* Write out the filtered row. */ +PNG_EXTERN void png_write_filtered_row PNGARG((png_structp png_ptr, + png_bytep filtered_row)) PNG_PRIVATE; +/* Finish a row while reading, dealing with interlacing passes, etc. */ +PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr)); + +/* Initialize the row buffers, etc. */ +PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr)) PNG_PRIVATE; +/* Optional call to update the users info structure */ +PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, + png_infop info_ptr)) PNG_PRIVATE; + +/* These are the functions that do the transformations */ +#ifdef PNG_READ_FILLER_SUPPORTED +PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, + png_bytep row, png_uint_32 filler, png_uint_32 flags)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_SWAP_ALPHA_SUPPORTED +PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info, + png_bytep row)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED +PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info, + png_bytep row)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_INVERT_ALPHA_SUPPORTED +PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info, + png_bytep row)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED +PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info, + png_bytep row)) PNG_PRIVATE; +#endif + +#if defined(PNG_WRITE_FILLER_SUPPORTED) || \ + defined(PNG_READ_STRIP_ALPHA_SUPPORTED) +PNG_EXTERN void png_do_strip_filler PNGARG((png_row_infop row_info, + png_bytep row, png_uint_32 flags)) PNG_PRIVATE; +#endif + +#if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) +PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, + png_bytep row)) PNG_PRIVATE; +#endif + +#if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED) +PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, + png_bytep row)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED +PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, png_row_infop + row_info, png_bytep row)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED +PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info, + png_bytep row)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_PACK_SUPPORTED +PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, + png_bytep row)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_SHIFT_SUPPORTED +PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, png_bytep row, + png_color_8p sig_bits)) PNG_PRIVATE; +#endif + +#if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) +PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, + png_bytep row)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_16_TO_8_SUPPORTED +PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, + png_bytep row)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_DITHER_SUPPORTED +PNG_EXTERN void png_do_dither PNGARG((png_row_infop row_info, + png_bytep row, png_bytep palette_lookup, + png_bytep dither_lookup)) PNG_PRIVATE; + +# ifdef PNG_CORRECT_PALETTE_SUPPORTED +PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr, + png_colorp palette, int num_palette)) PNG_PRIVATE; +# endif +#endif + +#if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) +PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, + png_bytep row)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_PACK_SUPPORTED +PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info, + png_bytep row, png_uint_32 bit_depth)) PNG_PRIVATE; +#endif + +#ifdef PNG_WRITE_SHIFT_SUPPORTED +PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, png_bytep row, + png_color_8p bit_depth)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_BACKGROUND_SUPPORTED +#ifdef PNG_READ_GAMMA_SUPPORTED +PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row, + png_color_16p trans_values, png_color_16p background, + png_color_16p background_1, + png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1, + png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1, + png_uint_16pp gamma_16_to_1, int gamma_shift)) PNG_PRIVATE; +#else +PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row, + png_color_16p trans_values, png_color_16p background)) PNG_PRIVATE; +#endif +#endif + +#ifdef PNG_READ_GAMMA_SUPPORTED +PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, png_bytep row, + png_bytep gamma_table, png_uint_16pp gamma_16_table, + int gamma_shift)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_EXPAND_SUPPORTED +PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info, + png_bytep row, png_colorp palette, png_bytep trans, + int num_trans)) PNG_PRIVATE; +PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info, + png_bytep row, png_color_16p trans_value)) PNG_PRIVATE; +#endif + +/* The following decodes the appropriate chunks, and does error correction, + * then calls the appropriate callback for the chunk if it is valid. + */ + +/* Decode the IHDR chunk */ +PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); + +#ifdef PNG_READ_bKGD_SUPPORTED +PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_cHRM_SUPPORTED +PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_gAMA_SUPPORTED +PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_hIST_SUPPORTED +PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_iCCP_SUPPORTED +extern void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)); +#endif /* PNG_READ_iCCP_SUPPORTED */ + +#ifdef PNG_READ_iTXt_SUPPORTED +PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_oFFs_SUPPORTED +PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_pCAL_SUPPORTED +PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_pHYs_SUPPORTED +PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_sBIT_SUPPORTED +PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_sCAL_SUPPORTED +PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_sPLT_SUPPORTED +extern void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif /* PNG_READ_sPLT_SUPPORTED */ + +#ifdef PNG_READ_sRGB_SUPPORTED +PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_tEXt_SUPPORTED +PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_tIME_SUPPORTED +PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_tRNS_SUPPORTED +PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +#ifdef PNG_READ_zTXt_SUPPORTED +PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, + png_uint_32 length)) PNG_PRIVATE; +#endif + +PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 length)) PNG_PRIVATE; + +PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr, + png_bytep chunk_name)) PNG_PRIVATE; + +/* Handle the transformations for reading and writing */ +PNG_EXTERN void png_do_read_transformations + PNGARG((png_structp png_ptr)) PNG_PRIVATE; +PNG_EXTERN void png_do_write_transformations + PNGARG((png_structp png_ptr)) PNG_PRIVATE; + +PNG_EXTERN void png_init_read_transformations + PNGARG((png_structp png_ptr)) PNG_PRIVATE; + +#ifdef PNG_PROGRESSIVE_READ_SUPPORTED +PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr, + png_infop info_ptr)) PNG_PRIVATE; +PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr, + png_infop info_ptr)) PNG_PRIVATE; +PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr)) PNG_PRIVATE; +PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr, + png_uint_32 length)) PNG_PRIVATE; +PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr)) PNG_PRIVATE; +PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr)) PNG_PRIVATE; +PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr, + png_bytep buffer, png_size_t buffer_length)) PNG_PRIVATE; +PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr)) PNG_PRIVATE; +PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr, + png_bytep buffer, png_size_t buffer_length)) PNG_PRIVATE; +PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr)) PNG_PRIVATE; +PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 length)) PNG_PRIVATE; +PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr, + png_infop info_ptr)) PNG_PRIVATE; +PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr, + png_infop info_ptr)) PNG_PRIVATE; +PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, + png_bytep row)) PNG_PRIVATE; +PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr, + png_infop info_ptr)) PNG_PRIVATE; +PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr, + png_infop info_ptr)) PNG_PRIVATE; +PNG_EXTERN void png_read_push_finish_row + PNGARG((png_structp png_ptr)) PNG_PRIVATE; +#ifdef PNG_READ_tEXt_SUPPORTED +PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 length)) PNG_PRIVATE; +PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr, + png_infop info_ptr)) PNG_PRIVATE; +#endif +#ifdef PNG_READ_zTXt_SUPPORTED +PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 length)) PNG_PRIVATE; +PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr, + png_infop info_ptr)) PNG_PRIVATE; +#endif +#ifdef PNG_READ_iTXt_SUPPORTED +PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 length)) PNG_PRIVATE; +PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr, + png_infop info_ptr)) PNG_PRIVATE; +#endif + +#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ + +#ifdef PNG_MNG_FEATURES_SUPPORTED +PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info, + png_bytep row)) PNG_PRIVATE; +PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info, + png_bytep row)) PNG_PRIVATE; +#endif + +#ifdef PNG_ASSEMBLER_CODE_SUPPORTED +#ifdef PNG_MMX_CODE_SUPPORTED +/* png.c */ /* PRIVATE */ +PNG_EXTERN void png_init_mmx_flags PNGARG((png_structp png_ptr)) PNG_PRIVATE; +#endif +#endif + + +/* The following six functions will be exported in libpng-1.4.0. */ +#if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED) +PNG_EXTERN png_uint_32 png_get_pixels_per_inch PNGARG((png_structp png_ptr, +png_infop info_ptr)); + +PNG_EXTERN png_uint_32 png_get_x_pixels_per_inch PNGARG((png_structp png_ptr, +png_infop info_ptr)); + +PNG_EXTERN png_uint_32 png_get_y_pixels_per_inch PNGARG((png_structp png_ptr, +png_infop info_ptr)); + +PNG_EXTERN float png_get_x_offset_inches PNGARG((png_structp png_ptr, +png_infop info_ptr)); + +PNG_EXTERN float png_get_y_offset_inches PNGARG((png_structp png_ptr, +png_infop info_ptr)); + +#ifdef PNG_pHYs_SUPPORTED +PNG_EXTERN png_uint_32 png_get_pHYs_dpi PNGARG((png_structp png_ptr, +png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); +#endif /* PNG_pHYs_SUPPORTED */ +#endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */ + +/* Read the chunk header (length + type name) */ +PNG_EXTERN png_uint_32 png_read_chunk_header + PNGARG((png_structp png_ptr)) PNG_PRIVATE; + +/* Added at libpng version 1.2.34 */ +#ifdef PNG_cHRM_SUPPORTED +PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr, + png_fixed_point int_white_x, png_fixed_point int_white_y, + png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point + int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, + png_fixed_point int_blue_y)) PNG_PRIVATE; +#endif + +#ifdef PNG_cHRM_SUPPORTED +#ifdef PNG_CHECK_cHRM_SUPPORTED +/* Added at libpng version 1.2.34 */ +PNG_EXTERN void png_64bit_product PNGARG((long v1, long v2, + unsigned long *hi_product, unsigned long *lo_product)) PNG_PRIVATE; +#endif +#endif + +/* Added at libpng version 1.2.41 */ +PNG_EXTERN void png_check_IHDR PNGARG((png_structp png_ptr, + png_uint_32 width, png_uint_32 height, int bit_depth, + int color_type, int interlace_type, int compression_type, + int filter_type)) PNG_PRIVATE; + +/* Added at libpng version 1.2.41 */ +PNG_EXTERN png_voidp png_calloc PNGARG((png_structp png_ptr, + png_uint_32 size)); + +/* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ + +#endif /* PNG_INTERNAL */ + +#ifdef __cplusplus +} +#endif + +#endif /* PNG_VERSION_INFO_ONLY */ +/* Do not put anything past this line */ +#endif /* PNG_H */ diff --git a/system/include/gfx/pngconf.h b/system/include/gfx/pngconf.h new file mode 100644 index 00000000..57293c3c --- /dev/null +++ b/system/include/gfx/pngconf.h @@ -0,0 +1,1665 @@ + +/* pngconf.h - machine configurable file for libpng + * + * libpng version 1.2.46 - July 9, 2011 + * Copyright (c) 1998-2011 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.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +/* Any machine specific code is near the front of this file, so if you + * are configuring libpng for a machine, you may want to read the section + * starting here down to where it starts to typedef png_color, png_text, + * and png_info. + */ + +#ifndef PNGCONF_H +#define PNGCONF_H + +#define PNG_1_2_X + +/* + * PNG_USER_CONFIG has to be defined on the compiler command line. This + * includes the resource compiler for Windows DLL configurations. + */ +#ifdef PNG_USER_CONFIG +# ifndef PNG_USER_PRIVATEBUILD +# define PNG_USER_PRIVATEBUILD +# endif +#include "pngusr.h" +#endif + +/* PNG_CONFIGURE_LIBPNG is set by the "configure" script. */ +#ifdef PNG_CONFIGURE_LIBPNG +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif +#endif + +/* + * Added at libpng-1.2.8 + * + * If you create a private DLL you need to define in "pngusr.h" the followings: + * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of + * the DLL was built> + * e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons." + * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to + * distinguish your DLL from those of the official release. These + * correspond to the trailing letters that come after the version + * number and must match your private DLL name> + * e.g. // private DLL "libpng13gx.dll" + * #define PNG_USER_DLLFNAME_POSTFIX "gx" + * + * The following macros are also at your disposal if you want to complete the + * DLL VERSIONINFO structure. + * - PNG_USER_VERSIONINFO_COMMENTS + * - PNG_USER_VERSIONINFO_COMPANYNAME + * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS + */ + +#ifdef __STDC__ +#ifdef SPECIALBUILD +# pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD)\ + are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.") +#endif + +#ifdef PRIVATEBUILD +# pragma message("PRIVATEBUILD is deprecated.\ + Use PNG_USER_PRIVATEBUILD instead.") +# define PNG_USER_PRIVATEBUILD PRIVATEBUILD +#endif +#endif /* __STDC__ */ + +#ifndef PNG_VERSION_INFO_ONLY + +/* End of material added to libpng-1.2.8 */ + +/* Added at libpng-1.2.19, removed at libpng-1.2.20 because it caused trouble + Restored at libpng-1.2.21 */ +#if !defined(PNG_NO_WARN_UNINITIALIZED_ROW) && \ + !defined(PNG_WARN_UNINITIALIZED_ROW) +# define PNG_WARN_UNINITIALIZED_ROW 1 +#endif +/* End of material added at libpng-1.2.19/1.2.21 */ + +/* This is the size of the compression buffer, and thus the size of + * an IDAT chunk. Make this whatever size you feel is best for your + * machine. One of these will be allocated per png_struct. When this + * is full, it writes the data to the disk, and does some other + * calculations. Making this an extremely small size will slow + * the library down, but you may want to experiment to determine + * where it becomes significant, if you are concerned with memory + * usage. Note that zlib allocates at least 32Kb also. For readers, + * this describes the size of the buffer available to read the data in. + * Unless this gets smaller than the size of a row (compressed), + * it should not make much difference how big this is. + */ + +#ifndef PNG_ZBUF_SIZE +# define PNG_ZBUF_SIZE 8192 +#endif + +/* Enable if you want a write-only libpng */ + +#ifndef PNG_NO_READ_SUPPORTED +# define PNG_READ_SUPPORTED +#endif + +/* Enable if you want a read-only libpng */ + +#ifndef PNG_NO_WRITE_SUPPORTED +# define PNG_WRITE_SUPPORTED +#endif + +/* Enabled in 1.2.41. */ +#ifdef PNG_ALLOW_BENIGN_ERRORS +# define png_benign_error png_warning +# define png_chunk_benign_error png_chunk_warning +#else +# ifndef PNG_BENIGN_ERRORS_SUPPORTED +# define png_benign_error png_error +# define png_chunk_benign_error png_chunk_error +# endif +#endif + +/* Added in libpng-1.2.41 */ +#if !defined(PNG_NO_WARNINGS) && !defined(PNG_WARNINGS_SUPPORTED) +# define PNG_WARNINGS_SUPPORTED +#endif + +#if !defined(PNG_NO_ERROR_TEXT) && !defined(PNG_ERROR_TEXT_SUPPORTED) +# define PNG_ERROR_TEXT_SUPPORTED +#endif + +#if !defined(PNG_NO_CHECK_cHRM) && !defined(PNG_CHECK_cHRM_SUPPORTED) +# define PNG_CHECK_cHRM_SUPPORTED +#endif + +/* Enabled by default in 1.2.0. You can disable this if you don't need to + * support PNGs that are embedded in MNG datastreams + */ +#if !defined(PNG_1_0_X) && !defined(PNG_NO_MNG_FEATURES) +# ifndef PNG_MNG_FEATURES_SUPPORTED +# define PNG_MNG_FEATURES_SUPPORTED +# endif +#endif + +#ifndef PNG_NO_FLOATING_POINT_SUPPORTED +# ifndef PNG_FLOATING_POINT_SUPPORTED +# define PNG_FLOATING_POINT_SUPPORTED +# endif +#endif + +/* If you are running on a machine where you cannot allocate more + * than 64K of memory at once, uncomment this. While libpng will not + * normally need that much memory in a chunk (unless you load up a very + * large file), zlib needs to know how big of a chunk it can use, and + * libpng thus makes sure to check any memory allocation to verify it + * will fit into memory. +#define PNG_MAX_MALLOC_64K + */ +#if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K) +# define PNG_MAX_MALLOC_64K +#endif + +/* Special munging to support doing things the 'cygwin' way: + * 'Normal' png-on-win32 defines/defaults: + * PNG_BUILD_DLL -- building dll + * PNG_USE_DLL -- building an application, linking to dll + * (no define) -- building static library, or building an + * application and linking to the static lib + * 'Cygwin' defines/defaults: + * PNG_BUILD_DLL -- (ignored) building the dll + * (no define) -- (ignored) building an application, linking to the dll + * PNG_STATIC -- (ignored) building the static lib, or building an + * application that links to the static lib. + * ALL_STATIC -- (ignored) building various static libs, or building an + * application that links to the static libs. + * Thus, + * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and + * this bit of #ifdefs will define the 'correct' config variables based on + * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but + * unnecessary. + * + * Also, the precedence order is: + * ALL_STATIC (since we can't #undef something outside our namespace) + * PNG_BUILD_DLL + * PNG_STATIC + * (nothing) == PNG_USE_DLL + * + * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent + * of auto-import in binutils, we no longer need to worry about + * __declspec(dllexport) / __declspec(dllimport) and friends. Therefore, + * we don't need to worry about PNG_STATIC or ALL_STATIC when it comes + * to __declspec() stuff. However, we DO need to worry about + * PNG_BUILD_DLL and PNG_STATIC because those change some defaults + * such as CONSOLE_IO and whether GLOBAL_ARRAYS are allowed. + */ +#ifdef __CYGWIN__ +# ifdef ALL_STATIC +# ifdef PNG_BUILD_DLL +# undef PNG_BUILD_DLL +# endif +# ifdef PNG_USE_DLL +# undef PNG_USE_DLL +# endif +# ifdef PNG_DLL +# undef PNG_DLL +# endif +# ifndef PNG_STATIC +# define PNG_STATIC +# endif +# else +# ifdef PNG_BUILD_DLL +# ifdef PNG_STATIC +# undef PNG_STATIC +# endif +# ifdef PNG_USE_DLL +# undef PNG_USE_DLL +# endif +# ifndef PNG_DLL +# define PNG_DLL +# endif +# else +# ifdef PNG_STATIC +# ifdef PNG_USE_DLL +# undef PNG_USE_DLL +# endif +# ifdef PNG_DLL +# undef PNG_DLL +# endif +# else +# ifndef PNG_USE_DLL +# define PNG_USE_DLL +# endif +# ifndef PNG_DLL +# define PNG_DLL +# endif +# endif +# endif +# endif +#endif + +/* This protects us against compilers that run on a windowing system + * and thus don't have or would rather us not use the stdio types: + * stdin, stdout, and stderr. The only one currently used is stderr + * in png_error() and png_warning(). #defining PNG_NO_CONSOLE_IO will + * prevent these from being compiled and used. #defining PNG_NO_STDIO + * will also prevent these, plus will prevent the entire set of stdio + * macros and functions (FILE *, printf, etc.) from being compiled and used, + * unless (PNG_DEBUG > 0) has been #defined. + * + * #define PNG_NO_CONSOLE_IO + * #define PNG_NO_STDIO + */ + +#if !defined(PNG_NO_STDIO) && !defined(PNG_STDIO_SUPPORTED) +# define PNG_STDIO_SUPPORTED +#endif + +#ifdef _WIN32_WCE +# include <windows.h> + /* Console I/O functions are not supported on WindowsCE */ +# define PNG_NO_CONSOLE_IO + /* abort() may not be supported on some/all Windows CE platforms */ +# define PNG_ABORT() exit(-1) +# ifdef PNG_DEBUG +# undef PNG_DEBUG +# endif +#endif + +#ifdef PNG_BUILD_DLL +# ifndef PNG_CONSOLE_IO_SUPPORTED +# ifndef PNG_NO_CONSOLE_IO +# define PNG_NO_CONSOLE_IO +# endif +# endif +#endif + +# ifdef PNG_NO_STDIO +# ifndef PNG_NO_CONSOLE_IO +# define PNG_NO_CONSOLE_IO +# endif +# ifdef PNG_DEBUG +# if (PNG_DEBUG > 0) +# include <stdio.h> +# endif +# endif +# else +# ifndef _WIN32_WCE +/* "stdio.h" functions are not supported on WindowsCE */ +# include <stdio.h> +# endif +# endif + +#if !(defined PNG_NO_CONSOLE_IO) && !defined(PNG_CONSOLE_IO_SUPPORTED) +# define PNG_CONSOLE_IO_SUPPORTED +#endif + +/* This macro protects us against machines that don't have function + * prototypes (ie K&R style headers). If your compiler does not handle + * function prototypes, define this macro and use the included ansi2knr. + * I've always been able to use _NO_PROTO as the indicator, but you may + * need to drag the empty declaration out in front of here, or change the + * ifdef to suit your own needs. + */ +#ifndef PNGARG + +#ifdef OF /* zlib prototype munger */ +# define PNGARG(arglist) OF(arglist) +#else + +#ifdef _NO_PROTO +# define PNGARG(arglist) () +# ifndef PNG_TYPECAST_NULL +# define PNG_TYPECAST_NULL +# endif +#else +# define PNGARG(arglist) arglist +#endif /* _NO_PROTO */ + + +#endif /* OF */ + +#endif /* PNGARG */ + +/* Try to determine if we are compiling on a Mac. Note that testing for + * just __MWERKS__ is not good enough, because the Codewarrior is now used + * on non-Mac platforms. + */ +#ifndef MACOS +# if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \ + defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC) +# define MACOS +# endif +#endif + +/* enough people need this for various reasons to include it here */ +#if !defined(MACOS) && !defined(RISCOS) && !defined(_WIN32_WCE) +# include <sys/types.h> +#endif + +#if !defined(PNG_SETJMP_NOT_SUPPORTED) && !defined(PNG_NO_SETJMP_SUPPORTED) +# define PNG_SETJMP_SUPPORTED +#endif + +#ifdef PNG_SETJMP_SUPPORTED +/* This is an attempt to force a single setjmp behaviour on Linux. If + * the X config stuff didn't define _BSD_SOURCE we wouldn't need this. + * + * You can bypass this test if you know that your application uses exactly + * the same setjmp.h that was included when libpng was built. Only define + * PNG_SKIP_SETJMP_CHECK while building your application, prior to the + * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK + * while building a separate libpng library for general use. + */ + +# ifndef PNG_SKIP_SETJMP_CHECK +# ifdef __linux__ +# ifdef _BSD_SOURCE +# define PNG_SAVE_BSD_SOURCE +# undef _BSD_SOURCE +# endif +# ifdef _SETJMP_H + /* If you encounter a compiler error here, see the explanation + * near the end of INSTALL. + */ + __pngconf.h__ in libpng already includes setjmp.h; + __dont__ include it again.; +# endif +# endif /* __linux__ */ +# endif /* PNG_SKIP_SETJMP_CHECK */ + + /* include setjmp.h for error handling */ +# include <setjmp.h> + +# ifdef __linux__ +# ifdef PNG_SAVE_BSD_SOURCE +# ifndef _BSD_SOURCE +# define _BSD_SOURCE +# endif +# undef PNG_SAVE_BSD_SOURCE +# endif +# endif /* __linux__ */ +#endif /* PNG_SETJMP_SUPPORTED */ + +#ifdef BSD +# include <strings.h> +#else +# include <string.h> +#endif + +/* Other defines for things like memory and the like can go here. */ +#ifdef PNG_INTERNAL + +#include <stdlib.h> + +/* The functions exported by PNG_EXTERN are PNG_INTERNAL functions, which + * aren't usually used outside the library (as far as I know), so it is + * debatable if they should be exported at all. In the future, when it is + * possible to have run-time registry of chunk-handling functions, some of + * these will be made available again. +#define PNG_EXTERN extern + */ +#define PNG_EXTERN + +/* Other defines specific to compilers can go here. Try to keep + * them inside an appropriate ifdef/endif pair for portability. + */ + +#ifdef PNG_FLOATING_POINT_SUPPORTED +# ifdef MACOS + /* We need to check that <math.h> hasn't already been included earlier + * as it seems it doesn't agree with <fp.h>, yet we should really use + * <fp.h> if possible. + */ +# if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__) +# include <fp.h> +# endif +# else +# include <math.h> +# endif +# if defined(_AMIGA) && defined(__SASC) && defined(_M68881) + /* Amiga SAS/C: We must include builtin FPU functions when compiling using + * MATH=68881 + */ +# include <m68881.h> +# endif +#endif + +/* Codewarrior on NT has linking problems without this. */ +#if (defined(__MWERKS__) && defined(WIN32)) || defined(__STDC__) +# define PNG_ALWAYS_EXTERN +#endif + +/* This provides the non-ANSI (far) memory allocation routines. */ +#if defined(__TURBOC__) && defined(__MSDOS__) +# include <mem.h> +# include <alloc.h> +#endif + +/* I have no idea why is this necessary... */ +#if defined(_MSC_VER) && (defined(WIN32) || defined(_Windows) || \ + defined(_WINDOWS) || defined(_WIN32) || defined(__WIN32__)) +# include <malloc.h> +#endif + +/* This controls how fine the dithering gets. As this allocates + * a largish chunk of memory (32K), those who are not as concerned + * with dithering quality can decrease some or all of these. + */ +#ifndef PNG_DITHER_RED_BITS +# define PNG_DITHER_RED_BITS 5 +#endif +#ifndef PNG_DITHER_GREEN_BITS +# define PNG_DITHER_GREEN_BITS 5 +#endif +#ifndef PNG_DITHER_BLUE_BITS +# define PNG_DITHER_BLUE_BITS 5 +#endif + +/* This controls how fine the gamma correction becomes when you + * are only interested in 8 bits anyway. Increasing this value + * results in more memory being used, and more pow() functions + * being called to fill in the gamma tables. Don't set this value + * less then 8, and even that may not work (I haven't tested it). + */ + +#ifndef PNG_MAX_GAMMA_8 +# define PNG_MAX_GAMMA_8 11 +#endif + +/* This controls how much a difference in gamma we can tolerate before + * we actually start doing gamma conversion. + */ +#ifndef PNG_GAMMA_THRESHOLD +# define PNG_GAMMA_THRESHOLD 0.05 +#endif + +#endif /* PNG_INTERNAL */ + +/* The following uses const char * instead of char * for error + * and warning message functions, so some compilers won't complain. + * If you do not want to use const, define PNG_NO_CONST here. + */ + +#ifndef PNG_NO_CONST +# define PNG_CONST const +#else +# define PNG_CONST +#endif + +/* The following defines give you the ability to remove code from the + * library that you will not be using. I wish I could figure out how to + * automate this, but I can't do that without making it seriously hard + * on the users. So if you are not using an ability, change the #define + * to and #undef, and that part of the library will not be compiled. If + * your linker can't find a function, you may want to make sure the + * ability is defined here. Some of these depend upon some others being + * defined. I haven't figured out all the interactions here, so you may + * have to experiment awhile to get everything to compile. If you are + * creating or using a shared library, you probably shouldn't touch this, + * as it will affect the size of the structures, and this will cause bad + * things to happen if the library and/or application ever change. + */ + +/* Any features you will not be using can be undef'ed here */ + +/* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user + * to turn it off with "*TRANSFORMS_NOT_SUPPORTED" or *PNG_NO_*_TRANSFORMS + * on the compile line, then pick and choose which ones to define without + * having to edit this file. It is safe to use the *TRANSFORMS_NOT_SUPPORTED + * if you only want to have a png-compliant reader/writer but don't need + * any of the extra transformations. This saves about 80 kbytes in a + * typical installation of the library. (PNG_NO_* form added in version + * 1.0.1c, for consistency) + */ + +/* The size of the png_text structure changed in libpng-1.0.6 when + * iTXt support was added. iTXt support was turned off by default through + * libpng-1.2.x, to support old apps that malloc the png_text structure + * instead of calling png_set_text() and letting libpng malloc it. It + * will be turned on by default in libpng-1.4.0. + */ + +#if defined(PNG_1_0_X) || defined (PNG_1_2_X) +# ifndef PNG_NO_iTXt_SUPPORTED +# define PNG_NO_iTXt_SUPPORTED +# endif +# ifndef PNG_NO_READ_iTXt +# define PNG_NO_READ_iTXt +# endif +# ifndef PNG_NO_WRITE_iTXt +# define PNG_NO_WRITE_iTXt +# endif +#endif + +#if !defined(PNG_NO_iTXt_SUPPORTED) +# if !defined(PNG_READ_iTXt_SUPPORTED) && !defined(PNG_NO_READ_iTXt) +# define PNG_READ_iTXt +# endif +# if !defined(PNG_WRITE_iTXt_SUPPORTED) && !defined(PNG_NO_WRITE_iTXt) +# define PNG_WRITE_iTXt +# endif +#endif + +/* The following support, added after version 1.0.0, can be turned off here en + * masse by defining PNG_LEGACY_SUPPORTED in case you need binary compatibility + * with old applications that require the length of png_struct and png_info + * to remain unchanged. + */ + +#ifdef PNG_LEGACY_SUPPORTED +# define PNG_NO_FREE_ME +# define PNG_NO_READ_UNKNOWN_CHUNKS +# define PNG_NO_WRITE_UNKNOWN_CHUNKS +# define PNG_NO_HANDLE_AS_UNKNOWN +# define PNG_NO_READ_USER_CHUNKS +# define PNG_NO_READ_iCCP +# define PNG_NO_WRITE_iCCP +# define PNG_NO_READ_iTXt +# define PNG_NO_WRITE_iTXt +# define PNG_NO_READ_sCAL +# define PNG_NO_WRITE_sCAL +# define PNG_NO_READ_sPLT +# define PNG_NO_WRITE_sPLT +# define PNG_NO_INFO_IMAGE +# define PNG_NO_READ_RGB_TO_GRAY +# define PNG_NO_READ_USER_TRANSFORM +# define PNG_NO_WRITE_USER_TRANSFORM +# define PNG_NO_USER_MEM +# define PNG_NO_READ_EMPTY_PLTE +# define PNG_NO_MNG_FEATURES +# define PNG_NO_FIXED_POINT_SUPPORTED +#endif + +/* Ignore attempt to turn off both floating and fixed point support */ +#if !defined(PNG_FLOATING_POINT_SUPPORTED) || \ + !defined(PNG_NO_FIXED_POINT_SUPPORTED) +# define PNG_FIXED_POINT_SUPPORTED +#endif + +#ifndef PNG_NO_FREE_ME +# define PNG_FREE_ME_SUPPORTED +#endif + +#ifdef PNG_READ_SUPPORTED + +#if !defined(PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \ + !defined(PNG_NO_READ_TRANSFORMS) +# define PNG_READ_TRANSFORMS_SUPPORTED +#endif + +#ifdef PNG_READ_TRANSFORMS_SUPPORTED +# ifndef PNG_NO_READ_EXPAND +# define PNG_READ_EXPAND_SUPPORTED +# endif +# ifndef PNG_NO_READ_SHIFT +# define PNG_READ_SHIFT_SUPPORTED +# endif +# ifndef PNG_NO_READ_PACK +# define PNG_READ_PACK_SUPPORTED +# endif +# ifndef PNG_NO_READ_BGR +# define PNG_READ_BGR_SUPPORTED +# endif +# ifndef PNG_NO_READ_SWAP +# define PNG_READ_SWAP_SUPPORTED +# endif +# ifndef PNG_NO_READ_PACKSWAP +# define PNG_READ_PACKSWAP_SUPPORTED +# endif +# ifndef PNG_NO_READ_INVERT +# define PNG_READ_INVERT_SUPPORTED +# endif +# ifndef PNG_NO_READ_DITHER +# define PNG_READ_DITHER_SUPPORTED +# endif +# ifndef PNG_NO_READ_BACKGROUND +# define PNG_READ_BACKGROUND_SUPPORTED +# endif +# ifndef PNG_NO_READ_16_TO_8 +# define PNG_READ_16_TO_8_SUPPORTED +# endif +# ifndef PNG_NO_READ_FILLER +# define PNG_READ_FILLER_SUPPORTED +# endif +# ifndef PNG_NO_READ_GAMMA +# define PNG_READ_GAMMA_SUPPORTED +# endif +# ifndef PNG_NO_READ_GRAY_TO_RGB +# define PNG_READ_GRAY_TO_RGB_SUPPORTED +# endif +# ifndef PNG_NO_READ_SWAP_ALPHA +# define PNG_READ_SWAP_ALPHA_SUPPORTED +# endif +# ifndef PNG_NO_READ_INVERT_ALPHA +# define PNG_READ_INVERT_ALPHA_SUPPORTED +# endif +# ifndef PNG_NO_READ_STRIP_ALPHA +# define PNG_READ_STRIP_ALPHA_SUPPORTED +# endif +# ifndef PNG_NO_READ_USER_TRANSFORM +# define PNG_READ_USER_TRANSFORM_SUPPORTED +# endif +# ifndef PNG_NO_READ_RGB_TO_GRAY +# define PNG_READ_RGB_TO_GRAY_SUPPORTED +# endif +#endif /* PNG_READ_TRANSFORMS_SUPPORTED */ + +/* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */ +#if !defined(PNG_NO_PROGRESSIVE_READ) && \ + !defined(PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */ +# define PNG_PROGRESSIVE_READ_SUPPORTED /* reading. This is not talking */ +#endif /* about interlacing capability! You'll */ + /* still have interlacing unless you change the following define: */ +#define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */ + +/* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */ +#if !defined(PNG_NO_SEQUENTIAL_READ) && \ + !defined(PNG_SEQUENTIAL_READ_SUPPORTED) && \ + !defined(PNG_NO_SEQUENTIAL_READ_SUPPORTED) +# define PNG_SEQUENTIAL_READ_SUPPORTED +#endif + +#define PNG_READ_INTERLACING_SUPPORTED /* required in PNG-compliant decoders */ + +#ifndef PNG_NO_READ_COMPOSITE_NODIV +# ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */ +# define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */ +# endif +#endif + +#if defined(PNG_1_0_X) || defined (PNG_1_2_X) +/* Deprecated, will be removed from version 2.0.0. + Use PNG_MNG_FEATURES_SUPPORTED instead. */ +#ifndef PNG_NO_READ_EMPTY_PLTE +# define PNG_READ_EMPTY_PLTE_SUPPORTED +#endif +#endif + +#endif /* PNG_READ_SUPPORTED */ + +#ifdef PNG_WRITE_SUPPORTED + +# if !defined(PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \ + !defined(PNG_NO_WRITE_TRANSFORMS) +# define PNG_WRITE_TRANSFORMS_SUPPORTED +#endif + +#ifdef PNG_WRITE_TRANSFORMS_SUPPORTED +# ifndef PNG_NO_WRITE_SHIFT +# define PNG_WRITE_SHIFT_SUPPORTED +# endif +# ifndef PNG_NO_WRITE_PACK +# define PNG_WRITE_PACK_SUPPORTED +# endif +# ifndef PNG_NO_WRITE_BGR +# define PNG_WRITE_BGR_SUPPORTED +# endif +# ifndef PNG_NO_WRITE_SWAP +# define PNG_WRITE_SWAP_SUPPORTED +# endif +# ifndef PNG_NO_WRITE_PACKSWAP +# define PNG_WRITE_PACKSWAP_SUPPORTED +# endif +# ifndef PNG_NO_WRITE_INVERT +# define PNG_WRITE_INVERT_SUPPORTED +# endif +# ifndef PNG_NO_WRITE_FILLER +# define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */ +# endif +# ifndef PNG_NO_WRITE_SWAP_ALPHA +# define PNG_WRITE_SWAP_ALPHA_SUPPORTED +# endif +#ifndef PNG_1_0_X +# ifndef PNG_NO_WRITE_INVERT_ALPHA +# define PNG_WRITE_INVERT_ALPHA_SUPPORTED +# endif +#endif +# ifndef PNG_NO_WRITE_USER_TRANSFORM +# define PNG_WRITE_USER_TRANSFORM_SUPPORTED +# endif +#endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */ + +#if !defined(PNG_NO_WRITE_INTERLACING_SUPPORTED) && \ + !defined(PNG_WRITE_INTERLACING_SUPPORTED) +#define PNG_WRITE_INTERLACING_SUPPORTED /* not required for PNG-compliant + encoders, but can cause trouble + if left undefined */ +#endif + +#if !defined(PNG_NO_WRITE_WEIGHTED_FILTER) && \ + !defined(PNG_WRITE_WEIGHTED_FILTER) && \ + defined(PNG_FLOATING_POINT_SUPPORTED) +# define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED +#endif + +#ifndef PNG_NO_WRITE_FLUSH +# define PNG_WRITE_FLUSH_SUPPORTED +#endif + +#if defined(PNG_1_0_X) || defined (PNG_1_2_X) +/* Deprecated, see PNG_MNG_FEATURES_SUPPORTED, above */ +#ifndef PNG_NO_WRITE_EMPTY_PLTE +# define PNG_WRITE_EMPTY_PLTE_SUPPORTED +#endif +#endif + +#endif /* PNG_WRITE_SUPPORTED */ + +#ifndef PNG_1_0_X +# ifndef PNG_NO_ERROR_NUMBERS +# define PNG_ERROR_NUMBERS_SUPPORTED +# endif +#endif /* PNG_1_0_X */ + +#if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) +# ifndef PNG_NO_USER_TRANSFORM_PTR +# define PNG_USER_TRANSFORM_PTR_SUPPORTED +# endif +#endif + +#ifndef PNG_NO_STDIO +# define PNG_TIME_RFC1123_SUPPORTED +#endif + +/* This adds extra functions in pngget.c for accessing data from the + * info pointer (added in version 0.99) + * png_get_image_width() + * png_get_image_height() + * png_get_bit_depth() + * png_get_color_type() + * png_get_compression_type() + * png_get_filter_type() + * png_get_interlace_type() + * png_get_pixel_aspect_ratio() + * png_get_pixels_per_meter() + * png_get_x_offset_pixels() + * png_get_y_offset_pixels() + * png_get_x_offset_microns() + * png_get_y_offset_microns() + */ +#if !defined(PNG_NO_EASY_ACCESS) && !defined(PNG_EASY_ACCESS_SUPPORTED) +# define PNG_EASY_ACCESS_SUPPORTED +#endif + +/* PNG_ASSEMBLER_CODE was enabled by default in version 1.2.0 + * and removed from version 1.2.20. The following will be removed + * from libpng-1.4.0 +*/ + +#if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_OPTIMIZED_CODE) +# ifndef PNG_OPTIMIZED_CODE_SUPPORTED +# define PNG_OPTIMIZED_CODE_SUPPORTED +# endif +#endif + +#if defined(PNG_READ_SUPPORTED) && !defined(PNG_NO_ASSEMBLER_CODE) +# ifndef PNG_ASSEMBLER_CODE_SUPPORTED +# define PNG_ASSEMBLER_CODE_SUPPORTED +# endif + +# if defined(__GNUC__) && defined(__x86_64__) && (__GNUC__ < 4) + /* work around 64-bit gcc compiler bugs in gcc-3.x */ +# if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE) +# define PNG_NO_MMX_CODE +# endif +# endif + +# ifdef __APPLE__ +# if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE) +# define PNG_NO_MMX_CODE +# endif +# endif + +# if (defined(__MWERKS__) && ((__MWERKS__ < 0x0900) || macintosh)) +# if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE) +# define PNG_NO_MMX_CODE +# endif +# endif + +# if !defined(PNG_MMX_CODE_SUPPORTED) && !defined(PNG_NO_MMX_CODE) +# define PNG_MMX_CODE_SUPPORTED +# endif + +#endif +/* end of obsolete code to be removed from libpng-1.4.0 */ + +/* Added at libpng-1.2.0 */ +#ifndef PNG_1_0_X +#if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED) +# define PNG_USER_MEM_SUPPORTED +#endif +#endif /* PNG_1_0_X */ + +/* Added at libpng-1.2.6 */ +#ifndef PNG_1_0_X +# ifndef PNG_SET_USER_LIMITS_SUPPORTED +# ifndef PNG_NO_SET_USER_LIMITS +# define PNG_SET_USER_LIMITS_SUPPORTED +# endif +# endif +#endif /* PNG_1_0_X */ + +/* Added at libpng-1.0.53 and 1.2.43 */ +#ifndef PNG_USER_LIMITS_SUPPORTED +# ifndef PNG_NO_USER_LIMITS +# define PNG_USER_LIMITS_SUPPORTED +# endif +#endif + +/* Added at libpng-1.0.16 and 1.2.6. To accept all valid PNGS no matter + * how large, set these limits to 0x7fffffffL + */ +#ifndef PNG_USER_WIDTH_MAX +# define PNG_USER_WIDTH_MAX 1000000L +#endif +#ifndef PNG_USER_HEIGHT_MAX +# define PNG_USER_HEIGHT_MAX 1000000L +#endif + +/* Added at libpng-1.2.43. To accept all valid PNGs no matter + * how large, set these two limits to 0. + */ +#ifndef PNG_USER_CHUNK_CACHE_MAX +# define PNG_USER_CHUNK_CACHE_MAX 0 +#endif + +/* Added at libpng-1.2.43 */ +#ifndef PNG_USER_CHUNK_MALLOC_MAX +# define PNG_USER_CHUNK_MALLOC_MAX 0 +#endif + +#ifndef PNG_LITERAL_SHARP +# define PNG_LITERAL_SHARP 0x23 +#endif +#ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET +# define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b +#endif +#ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET +# define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d +#endif + +/* Added at libpng-1.2.34 */ +#ifndef PNG_STRING_NEWLINE +#define PNG_STRING_NEWLINE "\n" +#endif + +/* These are currently experimental features, define them if you want */ + +/* very little testing */ +/* +#ifdef PNG_READ_SUPPORTED +# ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED +# define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED +# endif +#endif +*/ + +/* This is only for PowerPC big-endian and 680x0 systems */ +/* some testing */ +/* +#ifndef PNG_READ_BIG_ENDIAN_SUPPORTED +# define PNG_READ_BIG_ENDIAN_SUPPORTED +#endif +*/ + +/* Buggy compilers (e.g., gcc 2.7.2.2) need this */ +/* +#define PNG_NO_POINTER_INDEXING +*/ + +#if !defined(PNG_NO_POINTER_INDEXING) && \ + !defined(PNG_POINTER_INDEXING_SUPPORTED) +# define PNG_POINTER_INDEXING_SUPPORTED +#endif + +/* These functions are turned off by default, as they will be phased out. */ +/* +#define PNG_USELESS_TESTS_SUPPORTED +#define PNG_CORRECT_PALETTE_SUPPORTED +*/ + +/* Any chunks you are not interested in, you can undef here. The + * ones that allocate memory may be expecially important (hIST, + * tEXt, zTXt, tRNS, pCAL). Others will just save time and make png_info + * a bit smaller. + */ + +#if defined(PNG_READ_SUPPORTED) && \ + !defined(PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \ + !defined(PNG_NO_READ_ANCILLARY_CHUNKS) +# define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED +#endif + +#if defined(PNG_WRITE_SUPPORTED) && \ + !defined(PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \ + !defined(PNG_NO_WRITE_ANCILLARY_CHUNKS) +# define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED +#endif + +#ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED + +#ifdef PNG_NO_READ_TEXT +# define PNG_NO_READ_iTXt +# define PNG_NO_READ_tEXt +# define PNG_NO_READ_zTXt +#endif +#ifndef PNG_NO_READ_bKGD +# define PNG_READ_bKGD_SUPPORTED +# define PNG_bKGD_SUPPORTED +#endif +#ifndef PNG_NO_READ_cHRM +# define PNG_READ_cHRM_SUPPORTED +# define PNG_cHRM_SUPPORTED +#endif +#ifndef PNG_NO_READ_gAMA +# define PNG_READ_gAMA_SUPPORTED +# define PNG_gAMA_SUPPORTED +#endif +#ifndef PNG_NO_READ_hIST +# define PNG_READ_hIST_SUPPORTED +# define PNG_hIST_SUPPORTED +#endif +#ifndef PNG_NO_READ_iCCP +# define PNG_READ_iCCP_SUPPORTED +# define PNG_iCCP_SUPPORTED +#endif +#ifndef PNG_NO_READ_iTXt +# ifndef PNG_READ_iTXt_SUPPORTED +# define PNG_READ_iTXt_SUPPORTED +# endif +# ifndef PNG_iTXt_SUPPORTED +# define PNG_iTXt_SUPPORTED +# endif +#endif +#ifndef PNG_NO_READ_oFFs +# define PNG_READ_oFFs_SUPPORTED +# define PNG_oFFs_SUPPORTED +#endif +#ifndef PNG_NO_READ_pCAL +# define PNG_READ_pCAL_SUPPORTED +# define PNG_pCAL_SUPPORTED +#endif +#ifndef PNG_NO_READ_sCAL +# define PNG_READ_sCAL_SUPPORTED +# define PNG_sCAL_SUPPORTED +#endif +#ifndef PNG_NO_READ_pHYs +# define PNG_READ_pHYs_SUPPORTED +# define PNG_pHYs_SUPPORTED +#endif +#ifndef PNG_NO_READ_sBIT +# define PNG_READ_sBIT_SUPPORTED +# define PNG_sBIT_SUPPORTED +#endif +#ifndef PNG_NO_READ_sPLT +# define PNG_READ_sPLT_SUPPORTED +# define PNG_sPLT_SUPPORTED +#endif +#ifndef PNG_NO_READ_sRGB +# define PNG_READ_sRGB_SUPPORTED +# define PNG_sRGB_SUPPORTED +#endif +#ifndef PNG_NO_READ_tEXt +# define PNG_READ_tEXt_SUPPORTED +# define PNG_tEXt_SUPPORTED +#endif +#ifndef PNG_NO_READ_tIME +# define PNG_READ_tIME_SUPPORTED +# define PNG_tIME_SUPPORTED +#endif +#ifndef PNG_NO_READ_tRNS +# define PNG_READ_tRNS_SUPPORTED +# define PNG_tRNS_SUPPORTED +#endif +#ifndef PNG_NO_READ_zTXt +# define PNG_READ_zTXt_SUPPORTED +# define PNG_zTXt_SUPPORTED +#endif +#ifndef PNG_NO_READ_OPT_PLTE +# define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */ +#endif /* optional PLTE chunk in RGB and RGBA images */ +#if defined(PNG_READ_iTXt_SUPPORTED) || defined(PNG_READ_tEXt_SUPPORTED) || \ + defined(PNG_READ_zTXt_SUPPORTED) +# define PNG_READ_TEXT_SUPPORTED +# define PNG_TEXT_SUPPORTED +#endif + +#endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */ + +#ifndef PNG_NO_READ_UNKNOWN_CHUNKS +# define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED +# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED +# define PNG_UNKNOWN_CHUNKS_SUPPORTED +# endif +#endif +#if !defined(PNG_NO_READ_USER_CHUNKS) && \ + defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) +# define PNG_READ_USER_CHUNKS_SUPPORTED +# define PNG_USER_CHUNKS_SUPPORTED +# ifdef PNG_NO_READ_UNKNOWN_CHUNKS +# undef PNG_NO_READ_UNKNOWN_CHUNKS +# endif +# ifdef PNG_NO_HANDLE_AS_UNKNOWN +# undef PNG_NO_HANDLE_AS_UNKNOWN +# endif +#endif + +#ifndef PNG_NO_HANDLE_AS_UNKNOWN +# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED +# endif +#endif + +#ifdef PNG_WRITE_SUPPORTED +#ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED + +#ifdef PNG_NO_WRITE_TEXT +# define PNG_NO_WRITE_iTXt +# define PNG_NO_WRITE_tEXt +# define PNG_NO_WRITE_zTXt +#endif +#ifndef PNG_NO_WRITE_bKGD +# define PNG_WRITE_bKGD_SUPPORTED +# ifndef PNG_bKGD_SUPPORTED +# define PNG_bKGD_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_cHRM +# define PNG_WRITE_cHRM_SUPPORTED +# ifndef PNG_cHRM_SUPPORTED +# define PNG_cHRM_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_gAMA +# define PNG_WRITE_gAMA_SUPPORTED +# ifndef PNG_gAMA_SUPPORTED +# define PNG_gAMA_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_hIST +# define PNG_WRITE_hIST_SUPPORTED +# ifndef PNG_hIST_SUPPORTED +# define PNG_hIST_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_iCCP +# define PNG_WRITE_iCCP_SUPPORTED +# ifndef PNG_iCCP_SUPPORTED +# define PNG_iCCP_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_iTXt +# ifndef PNG_WRITE_iTXt_SUPPORTED +# define PNG_WRITE_iTXt_SUPPORTED +# endif +# ifndef PNG_iTXt_SUPPORTED +# define PNG_iTXt_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_oFFs +# define PNG_WRITE_oFFs_SUPPORTED +# ifndef PNG_oFFs_SUPPORTED +# define PNG_oFFs_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_pCAL +# define PNG_WRITE_pCAL_SUPPORTED +# ifndef PNG_pCAL_SUPPORTED +# define PNG_pCAL_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_sCAL +# define PNG_WRITE_sCAL_SUPPORTED +# ifndef PNG_sCAL_SUPPORTED +# define PNG_sCAL_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_pHYs +# define PNG_WRITE_pHYs_SUPPORTED +# ifndef PNG_pHYs_SUPPORTED +# define PNG_pHYs_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_sBIT +# define PNG_WRITE_sBIT_SUPPORTED +# ifndef PNG_sBIT_SUPPORTED +# define PNG_sBIT_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_sPLT +# define PNG_WRITE_sPLT_SUPPORTED +# ifndef PNG_sPLT_SUPPORTED +# define PNG_sPLT_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_sRGB +# define PNG_WRITE_sRGB_SUPPORTED +# ifndef PNG_sRGB_SUPPORTED +# define PNG_sRGB_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_tEXt +# define PNG_WRITE_tEXt_SUPPORTED +# ifndef PNG_tEXt_SUPPORTED +# define PNG_tEXt_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_tIME +# define PNG_WRITE_tIME_SUPPORTED +# ifndef PNG_tIME_SUPPORTED +# define PNG_tIME_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_tRNS +# define PNG_WRITE_tRNS_SUPPORTED +# ifndef PNG_tRNS_SUPPORTED +# define PNG_tRNS_SUPPORTED +# endif +#endif +#ifndef PNG_NO_WRITE_zTXt +# define PNG_WRITE_zTXt_SUPPORTED +# ifndef PNG_zTXt_SUPPORTED +# define PNG_zTXt_SUPPORTED +# endif +#endif +#if defined(PNG_WRITE_iTXt_SUPPORTED) || defined(PNG_WRITE_tEXt_SUPPORTED) || \ + defined(PNG_WRITE_zTXt_SUPPORTED) +# define PNG_WRITE_TEXT_SUPPORTED +# ifndef PNG_TEXT_SUPPORTED +# define PNG_TEXT_SUPPORTED +# endif +#endif + +#ifdef PNG_WRITE_tIME_SUPPORTED +# ifndef PNG_NO_CONVERT_tIME +# ifndef _WIN32_WCE +/* The "tm" structure is not supported on WindowsCE */ +# ifndef PNG_CONVERT_tIME_SUPPORTED +# define PNG_CONVERT_tIME_SUPPORTED +# endif +# endif +# endif +#endif + +#endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */ + +#if !defined(PNG_NO_WRITE_FILTER) && !defined(PNG_WRITE_FILTER_SUPPORTED) +# define PNG_WRITE_FILTER_SUPPORTED +#endif + +#ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS +# define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED +# ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED +# define PNG_UNKNOWN_CHUNKS_SUPPORTED +# endif +#endif + +#ifndef PNG_NO_HANDLE_AS_UNKNOWN +# ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +# define PNG_HANDLE_AS_UNKNOWN_SUPPORTED +# endif +#endif +#endif /* PNG_WRITE_SUPPORTED */ + +/* Turn this off to disable png_read_png() and + * png_write_png() and leave the row_pointers member + * out of the info structure. + */ +#ifndef PNG_NO_INFO_IMAGE +# define PNG_INFO_IMAGE_SUPPORTED +#endif + +/* Need the time information for converting tIME chunks */ +#ifdef PNG_CONVERT_tIME_SUPPORTED + /* "time.h" functions are not supported on WindowsCE */ +# include <time.h> +#endif + +/* Some typedefs to get us started. These should be safe on most of the + * common platforms. The typedefs should be at least as large as the + * numbers suggest (a png_uint_32 must be at least 32 bits long), but they + * don't have to be exactly that size. Some compilers dislike passing + * unsigned shorts as function parameters, so you may be better off using + * unsigned int for png_uint_16. Likewise, for 64-bit systems, you may + * want to have unsigned int for png_uint_32 instead of unsigned long. + */ + +typedef unsigned long png_uint_32; +typedef long png_int_32; +typedef unsigned short png_uint_16; +typedef short png_int_16; +typedef unsigned char png_byte; + +/* This is usually size_t. It is typedef'ed just in case you need it to + change (I'm not sure if you will or not, so I thought I'd be safe) */ +#ifdef PNG_SIZE_T + typedef PNG_SIZE_T png_size_t; +# define png_sizeof(x) png_convert_size(sizeof(x)) +#else + typedef size_t png_size_t; +# define png_sizeof(x) sizeof(x) +#endif + +/* The following is needed for medium model support. It cannot be in the + * PNG_INTERNAL section. Needs modification for other compilers besides + * MSC. Model independent support declares all arrays and pointers to be + * large using the far keyword. The zlib version used must also support + * model independent data. As of version zlib 1.0.4, the necessary changes + * have been made in zlib. The USE_FAR_KEYWORD define triggers other + * changes that are needed. (Tim Wegner) + */ + +/* Separate compiler dependencies (problem here is that zlib.h always + defines FAR. (SJT) */ +#ifdef __BORLANDC__ +# if defined(__LARGE__) || defined(__HUGE__) || defined(__COMPACT__) +# define LDATA 1 +# else +# define LDATA 0 +# endif + /* GRR: why is Cygwin in here? Cygwin is not Borland C... */ +# if !defined(__WIN32__) && !defined(__FLAT__) && !defined(__CYGWIN__) +# define PNG_MAX_MALLOC_64K +# if (LDATA != 1) +# ifndef FAR +# define FAR __far +# endif +# define USE_FAR_KEYWORD +# endif /* LDATA != 1 */ + /* Possibly useful for moving data out of default segment. + * Uncomment it if you want. Could also define FARDATA as + * const if your compiler supports it. (SJT) +# define FARDATA FAR + */ +# endif /* __WIN32__, __FLAT__, __CYGWIN__ */ +#endif /* __BORLANDC__ */ + + +/* Suggest testing for specific compiler first before testing for + * FAR. The Watcom compiler defines both __MEDIUM__ and M_I86MM, + * making reliance oncertain keywords suspect. (SJT) + */ + +/* MSC Medium model */ +#ifdef FAR +# ifdef M_I86MM +# define USE_FAR_KEYWORD +# define FARDATA FAR +# include <dos.h> +# endif +#endif + +/* SJT: default case */ +#ifndef FAR +# define FAR +#endif + +/* At this point FAR is always defined */ +#ifndef FARDATA +# define FARDATA +#endif + +/* Typedef for floating-point numbers that are converted + to fixed-point with a multiple of 100,000, e.g., int_gamma */ +typedef png_int_32 png_fixed_point; + +/* Add typedefs for pointers */ +typedef void FAR * png_voidp; +typedef png_byte FAR * png_bytep; +typedef png_uint_32 FAR * png_uint_32p; +typedef png_int_32 FAR * png_int_32p; +typedef png_uint_16 FAR * png_uint_16p; +typedef png_int_16 FAR * png_int_16p; +typedef PNG_CONST char FAR * png_const_charp; +typedef char FAR * png_charp; +typedef png_fixed_point FAR * png_fixed_point_p; + +#ifndef PNG_NO_STDIO +#ifdef _WIN32_WCE +typedef HANDLE png_FILE_p; +#else +typedef FILE * png_FILE_p; +#endif +#endif + +#ifdef PNG_FLOATING_POINT_SUPPORTED +typedef double FAR * png_doublep; +#endif + +/* Pointers to pointers; i.e. arrays */ +typedef png_byte FAR * FAR * png_bytepp; +typedef png_uint_32 FAR * FAR * png_uint_32pp; +typedef png_int_32 FAR * FAR * png_int_32pp; +typedef png_uint_16 FAR * FAR * png_uint_16pp; +typedef png_int_16 FAR * FAR * png_int_16pp; +typedef PNG_CONST char FAR * FAR * png_const_charpp; +typedef char FAR * FAR * png_charpp; +typedef png_fixed_point FAR * FAR * png_fixed_point_pp; +#ifdef PNG_FLOATING_POINT_SUPPORTED +typedef double FAR * FAR * png_doublepp; +#endif + +/* Pointers to pointers to pointers; i.e., pointer to array */ +typedef char FAR * FAR * FAR * png_charppp; + +#if defined(PNG_1_0_X) || defined(PNG_1_2_X) +/* SPC - Is this stuff deprecated? */ +/* It'll be removed as of libpng-1.4.0 - GR-P */ +/* libpng typedefs for types in zlib. If zlib changes + * or another compression library is used, then change these. + * Eliminates need to change all the source files. + */ +typedef charf * png_zcharp; +typedef charf * FAR * png_zcharpp; +typedef z_stream FAR * png_zstreamp; +#endif /* (PNG_1_0_X) || defined(PNG_1_2_X) */ + +/* + * Define PNG_BUILD_DLL if the module being built is a Windows + * LIBPNG DLL. + * + * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL. + * It is equivalent to Microsoft predefined macro _DLL that is + * automatically defined when you compile using the share + * version of the CRT (C Run-Time library) + * + * The cygwin mods make this behavior a little different: + * Define PNG_BUILD_DLL if you are building a dll for use with cygwin + * Define PNG_STATIC if you are building a static library for use with cygwin, + * -or- if you are building an application that you want to link to the + * static library. + * PNG_USE_DLL is defined by default (no user action needed) unless one of + * the other flags is defined. + */ + +#if !defined(PNG_DLL) && (defined(PNG_BUILD_DLL) || defined(PNG_USE_DLL)) +# define PNG_DLL +#endif +/* If CYGWIN, then disallow GLOBAL ARRAYS unless building a static lib. + * When building a static lib, default to no GLOBAL ARRAYS, but allow + * command-line override + */ +#ifdef __CYGWIN__ +# ifndef PNG_STATIC +# ifdef PNG_USE_GLOBAL_ARRAYS +# undef PNG_USE_GLOBAL_ARRAYS +# endif +# ifndef PNG_USE_LOCAL_ARRAYS +# define PNG_USE_LOCAL_ARRAYS +# endif +# else +# if defined(PNG_USE_LOCAL_ARRAYS) || defined(PNG_NO_GLOBAL_ARRAYS) +# ifdef PNG_USE_GLOBAL_ARRAYS +# undef PNG_USE_GLOBAL_ARRAYS +# endif +# endif +# endif +# if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS) +# define PNG_USE_LOCAL_ARRAYS +# endif +#endif + +/* Do not use global arrays (helps with building DLL's) + * They are no longer used in libpng itself, since version 1.0.5c, + * but might be required for some pre-1.0.5c applications. + */ +#if !defined(PNG_USE_LOCAL_ARRAYS) && !defined(PNG_USE_GLOBAL_ARRAYS) +# if defined(PNG_NO_GLOBAL_ARRAYS) || \ + (defined(__GNUC__) && defined(PNG_DLL)) || defined(_MSC_VER) +# define PNG_USE_LOCAL_ARRAYS +# else +# define PNG_USE_GLOBAL_ARRAYS +# endif +#endif + +#ifdef __CYGWIN__ +# undef PNGAPI +# define PNGAPI __cdecl +# undef PNG_IMPEXP +# define PNG_IMPEXP +#endif + +/* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall", + * you may get warnings regarding the linkage of png_zalloc and png_zfree. + * Don't ignore those warnings; you must also reset the default calling + * convention in your compiler to match your PNGAPI, and you must build + * zlib and your applications the same way you build libpng. + */ + +#if defined(__MINGW32__) && !defined(PNG_MODULEDEF) +# ifndef PNG_NO_MODULEDEF +# define PNG_NO_MODULEDEF +# endif +#endif + +#if !defined(PNG_IMPEXP) && defined(PNG_BUILD_DLL) && !defined(PNG_NO_MODULEDEF) +# define PNG_IMPEXP +#endif + +#if defined(PNG_DLL) || defined(_DLL) || defined(__DLL__ ) || \ + (( defined(_Windows) || defined(_WINDOWS) || \ + defined(WIN32) || defined(_WIN32) || defined(__WIN32__) )) + +# ifndef PNGAPI +# if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800)) +# define PNGAPI __cdecl +# else +# define PNGAPI _cdecl +# endif +# endif + +# if !defined(PNG_IMPEXP) && (!defined(PNG_DLL) || \ + 0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */) +# define PNG_IMPEXP +# endif + +# ifndef PNG_IMPEXP + +# define PNG_EXPORT_TYPE1(type,symbol) PNG_IMPEXP type PNGAPI symbol +# define PNG_EXPORT_TYPE2(type,symbol) type PNG_IMPEXP PNGAPI symbol + + /* Borland/Microsoft */ +# if defined(_MSC_VER) || defined(__BORLANDC__) +# if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500) +# define PNG_EXPORT PNG_EXPORT_TYPE1 +# else +# define PNG_EXPORT PNG_EXPORT_TYPE2 +# ifdef PNG_BUILD_DLL +# define PNG_IMPEXP __export +# else +# define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in + VC++ */ +# endif /* Exists in Borland C++ for + C++ classes (== huge) */ +# endif +# endif + +# ifndef PNG_IMPEXP +# ifdef PNG_BUILD_DLL +# define PNG_IMPEXP __declspec(dllexport) +# else +# define PNG_IMPEXP __declspec(dllimport) +# endif +# endif +# endif /* PNG_IMPEXP */ +#else /* !(DLL || non-cygwin WINDOWS) */ +# if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__) +# ifndef PNGAPI +# define PNGAPI _System +# endif +# else +# if 0 /* ... other platforms, with other meanings */ +# endif +# endif +#endif + +#ifndef PNGAPI +# define PNGAPI +#endif +#ifndef PNG_IMPEXP +# define PNG_IMPEXP +#endif + +#ifdef PNG_BUILDSYMS +# ifndef PNG_EXPORT +# define PNG_EXPORT(type,symbol) PNG_FUNCTION_EXPORT symbol END +# endif +# ifdef PNG_USE_GLOBAL_ARRAYS +# ifndef PNG_EXPORT_VAR +# define PNG_EXPORT_VAR(type) PNG_DATA_EXPORT +# endif +# endif +#endif + +#ifndef PNG_EXPORT +# define PNG_EXPORT(type,symbol) PNG_IMPEXP type PNGAPI symbol +#endif + +#ifdef PNG_USE_GLOBAL_ARRAYS +# ifndef PNG_EXPORT_VAR +# define PNG_EXPORT_VAR(type) extern PNG_IMPEXP type +# endif +#endif + +#ifdef PNG_PEDANTIC_WARNINGS +# ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED +# define PNG_PEDANTIC_WARNINGS_SUPPORTED +# endif +#endif + +#ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED +/* Support for compiler specific function attributes. These are used + * so that where compiler support is available incorrect use of API + * functions in png.h will generate compiler warnings. Added at libpng + * version 1.2.41. + */ +# ifdef __GNUC__ +# ifndef PNG_USE_RESULT +# define PNG_USE_RESULT __attribute__((__warn_unused_result__)) +# endif +# ifndef PNG_NORETURN +# define PNG_NORETURN __attribute__((__noreturn__)) +# endif +# ifndef PNG_ALLOCATED +# define PNG_ALLOCATED __attribute__((__malloc__)) +# endif + + /* This specifically protects structure members that should only be + * accessed from within the library, therefore should be empty during + * a library build. + */ +# ifndef PNG_DEPRECATED +# define PNG_DEPRECATED __attribute__((__deprecated__)) +# endif +# ifndef PNG_DEPSTRUCT +# define PNG_DEPSTRUCT __attribute__((__deprecated__)) +# endif +# ifndef PNG_PRIVATE +# if 0 /* Doesn't work so we use deprecated instead*/ +# define PNG_PRIVATE \ + __attribute__((warning("This function is not exported by libpng."))) +# else +# define PNG_PRIVATE \ + __attribute__((__deprecated__)) +# endif +# endif /* PNG_PRIVATE */ +# endif /* __GNUC__ */ +#endif /* PNG_PEDANTIC_WARNINGS */ + +#ifndef PNG_DEPRECATED +# define PNG_DEPRECATED /* Use of this function is deprecated */ +#endif +#ifndef PNG_USE_RESULT +# define PNG_USE_RESULT /* The result of this function must be checked */ +#endif +#ifndef PNG_NORETURN +# define PNG_NORETURN /* This function does not return */ +#endif +#ifndef PNG_ALLOCATED +# define PNG_ALLOCATED /* The result of the function is new memory */ +#endif +#ifndef PNG_DEPSTRUCT +# define PNG_DEPSTRUCT /* Access to this struct member is deprecated */ +#endif +#ifndef PNG_PRIVATE +# define PNG_PRIVATE /* This is a private libpng function */ +#endif + +/* User may want to use these so they are not in PNG_INTERNAL. Any library + * functions that are passed far data must be model independent. + */ + +#ifndef PNG_ABORT +# define PNG_ABORT() abort() +#endif + +#ifdef PNG_SETJMP_SUPPORTED +# define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf) +#else +# define png_jmpbuf(png_ptr) \ + (LIBPNG_WAS_COMPILED_WITH__PNG_SETJMP_NOT_SUPPORTED) +#endif + +#ifdef USE_FAR_KEYWORD /* memory model independent fns */ +/* Use this to make far-to-near assignments */ +# define CHECK 1 +# define NOCHECK 0 +# define CVT_PTR(ptr) (png_far_to_near(png_ptr,ptr,CHECK)) +# define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr,ptr,NOCHECK)) +# define png_snprintf _fsnprintf /* Added to v 1.2.19 */ +# define png_strlen _fstrlen +# define png_memcmp _fmemcmp /* SJT: added */ +# define png_memcpy _fmemcpy +# define png_memset _fmemset +#else /* Use the usual functions */ +# define CVT_PTR(ptr) (ptr) +# define CVT_PTR_NOCHECK(ptr) (ptr) +# ifndef PNG_NO_SNPRINTF +# ifdef _MSC_VER +# define png_snprintf _snprintf /* Added to v 1.2.19 */ +# define png_snprintf2 _snprintf +# define png_snprintf6 _snprintf +# else +# define png_snprintf snprintf /* Added to v 1.2.19 */ +# define png_snprintf2 snprintf +# define png_snprintf6 snprintf +# endif +# else + /* You don't have or don't want to use snprintf(). Caution: Using + * sprintf instead of snprintf exposes your application to accidental + * or malevolent buffer overflows. If you don't have snprintf() + * as a general rule you should provide one (you can get one from + * Portable OpenSSH). + */ +# define png_snprintf(s1,n,fmt,x1) sprintf(s1,fmt,x1) +# define png_snprintf2(s1,n,fmt,x1,x2) sprintf(s1,fmt,x1,x2) +# define png_snprintf6(s1,n,fmt,x1,x2,x3,x4,x5,x6) \ + sprintf(s1,fmt,x1,x2,x3,x4,x5,x6) +# endif +# define png_strlen strlen +# define png_memcmp memcmp /* SJT: added */ +# define png_memcpy memcpy +# define png_memset memset +#endif +/* End of memory model independent support */ + +/* Just a little check that someone hasn't tried to define something + * contradictory. + */ +#if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K) +# undef PNG_ZBUF_SIZE +# define PNG_ZBUF_SIZE 65536L +#endif + +/* Added at libpng-1.2.8 */ +#endif /* PNG_VERSION_INFO_ONLY */ + +#endif /* PNGCONF_H */ diff --git a/system/include/libc/getopt.h b/system/include/libc/getopt.h index ba8da4a7..dd21deb6 100644 --- a/system/include/libc/getopt.h +++ b/system/include/libc/getopt.h @@ -117,6 +117,12 @@ extern "C" }; + /* XXX Emscripten */ + #define NO_ARG 0 + #define REQ_ARG 1 + #define OPT_ARG 2 + typedef struct option option_t; + /* While getopt.h is a glibc extension, the following are newlib extensions. * They are optionally included via the __need_getopt_newlib flag. */ diff --git a/system/include/libc/machine/setjmp.h b/system/include/libc/machine/setjmp.h index a4699651..d3f9bda3 100644 --- a/system/include/libc/machine/setjmp.h +++ b/system/include/libc/machine/setjmp.h @@ -269,6 +269,11 @@ _BEGIN_STD_C #define _JBLEN 0x44 #endif +#ifdef EMSCRIPTEN /* Not that this can actually work... */ +#define _JBLEN 20 +#define _JBTYPE unsigned short +#endif + #ifdef _JBLEN #ifdef _JBTYPE typedef _JBTYPE jmp_buf[_JBLEN]; diff --git a/system/include/zconf.h b/system/include/zconf.h new file mode 100644 index 00000000..b2343874 --- /dev/null +++ b/system/include/zconf.h @@ -0,0 +1,428 @@ +/* zconf.h -- configuration of the zlib compression library + * Copyright (C) 1995-2010 Jean-loup Gailly. + * For conditions of distribution and use, see copyright notice in zlib.h + */ + +/* @(#) $Id$ */ + +#ifndef ZCONF_H +#define ZCONF_H + +/* + * If you *really* need a unique prefix for all types and library functions, + * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it. + * Even better than compiling with -DZ_PREFIX would be to use configure to set + * this permanently in zconf.h using "./configure --zprefix". + */ +#ifdef Z_PREFIX /* may be set to #if 1 by ./configure */ + +/* all linked symbols */ +# define _dist_code z__dist_code +# define _length_code z__length_code +# define _tr_align z__tr_align +# define _tr_flush_block z__tr_flush_block +# define _tr_init z__tr_init +# define _tr_stored_block z__tr_stored_block +# define _tr_tally z__tr_tally +# define adler32 z_adler32 +# define adler32_combine z_adler32_combine +# define adler32_combine64 z_adler32_combine64 +# define compress z_compress +# define compress2 z_compress2 +# define compressBound z_compressBound +# define crc32 z_crc32 +# define crc32_combine z_crc32_combine +# define crc32_combine64 z_crc32_combine64 +# define deflate z_deflate +# define deflateBound z_deflateBound +# define deflateCopy z_deflateCopy +# define deflateEnd z_deflateEnd +# define deflateInit2_ z_deflateInit2_ +# define deflateInit_ z_deflateInit_ +# define deflateParams z_deflateParams +# define deflatePrime z_deflatePrime +# define deflateReset z_deflateReset +# define deflateSetDictionary z_deflateSetDictionary +# define deflateSetHeader z_deflateSetHeader +# define deflateTune z_deflateTune +# define deflate_copyright z_deflate_copyright +# define get_crc_table z_get_crc_table +# define gz_error z_gz_error +# define gz_intmax z_gz_intmax +# define gz_strwinerror z_gz_strwinerror +# define gzbuffer z_gzbuffer +# define gzclearerr z_gzclearerr +# define gzclose z_gzclose +# define gzclose_r z_gzclose_r +# define gzclose_w z_gzclose_w +# define gzdirect z_gzdirect +# define gzdopen z_gzdopen +# define gzeof z_gzeof +# define gzerror z_gzerror +# define gzflush z_gzflush +# define gzgetc z_gzgetc +# define gzgets z_gzgets +# define gzoffset z_gzoffset +# define gzoffset64 z_gzoffset64 +# define gzopen z_gzopen +# define gzopen64 z_gzopen64 +# define gzprintf z_gzprintf +# define gzputc z_gzputc +# define gzputs z_gzputs +# define gzread z_gzread +# define gzrewind z_gzrewind +# define gzseek z_gzseek +# define gzseek64 z_gzseek64 +# define gzsetparams z_gzsetparams +# define gztell z_gztell +# define gztell64 z_gztell64 +# define gzungetc z_gzungetc +# define gzwrite z_gzwrite +# define inflate z_inflate +# define inflateBack z_inflateBack +# define inflateBackEnd z_inflateBackEnd +# define inflateBackInit_ z_inflateBackInit_ +# define inflateCopy z_inflateCopy +# define inflateEnd z_inflateEnd +# define inflateGetHeader z_inflateGetHeader +# define inflateInit2_ z_inflateInit2_ +# define inflateInit_ z_inflateInit_ +# define inflateMark z_inflateMark +# define inflatePrime z_inflatePrime +# define inflateReset z_inflateReset +# define inflateReset2 z_inflateReset2 +# define inflateSetDictionary z_inflateSetDictionary +# define inflateSync z_inflateSync +# define inflateSyncPoint z_inflateSyncPoint +# define inflateUndermine z_inflateUndermine +# define inflate_copyright z_inflate_copyright +# define inflate_fast z_inflate_fast +# define inflate_table z_inflate_table +# define uncompress z_uncompress +# define zError z_zError +# define zcalloc z_zcalloc +# define zcfree z_zcfree +# define zlibCompileFlags z_zlibCompileFlags +# define zlibVersion z_zlibVersion + +/* all zlib typedefs in zlib.h and zconf.h */ +# define Byte z_Byte +# define Bytef z_Bytef +# define alloc_func z_alloc_func +# define charf z_charf +# define free_func z_free_func +# define gzFile z_gzFile +# define gz_header z_gz_header +# define gz_headerp z_gz_headerp +# define in_func z_in_func +# define intf z_intf +# define out_func z_out_func +# define uInt z_uInt +# define uIntf z_uIntf +# define uLong z_uLong +# define uLongf z_uLongf +# define voidp z_voidp +# define voidpc z_voidpc +# define voidpf z_voidpf + +/* all zlib structs in zlib.h and zconf.h */ +# define gz_header_s z_gz_header_s +# define internal_state z_internal_state + +#endif + +#if defined(__MSDOS__) && !defined(MSDOS) +# define MSDOS +#endif +#if (defined(OS_2) || defined(__OS2__)) && !defined(OS2) +# define OS2 +#endif +#if defined(_WINDOWS) && !defined(WINDOWS) +# define WINDOWS +#endif +#if defined(_WIN32) || defined(_WIN32_WCE) || defined(__WIN32__) +# ifndef WIN32 +# define WIN32 +# endif +#endif +#if (defined(MSDOS) || defined(OS2) || defined(WINDOWS)) && !defined(WIN32) +# if !defined(__GNUC__) && !defined(__FLAT__) && !defined(__386__) +# ifndef SYS16BIT +# define SYS16BIT +# endif +# endif +#endif + +/* + * Compile with -DMAXSEG_64K if the alloc function cannot allocate more + * than 64k bytes at a time (needed on systems with 16-bit int). + */ +#ifdef SYS16BIT +# define MAXSEG_64K +#endif +#ifdef MSDOS +# define UNALIGNED_OK +#endif + +#ifdef __STDC_VERSION__ +# ifndef STDC +# define STDC +# endif +# if __STDC_VERSION__ >= 199901L +# ifndef STDC99 +# define STDC99 +# endif +# endif +#endif +#if !defined(STDC) && (defined(__STDC__) || defined(__cplusplus)) +# define STDC +#endif +#if !defined(STDC) && (defined(__GNUC__) || defined(__BORLANDC__)) +# define STDC +#endif +#if !defined(STDC) && (defined(MSDOS) || defined(WINDOWS) || defined(WIN32)) +# define STDC +#endif +#if !defined(STDC) && (defined(OS2) || defined(__HOS_AIX__)) +# define STDC +#endif + +#if defined(__OS400__) && !defined(STDC) /* iSeries (formerly AS/400). */ +# define STDC +#endif + +#ifndef STDC +# ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */ +# define const /* note: need a more gentle solution here */ +# endif +#endif + +/* Some Mac compilers merge all .h files incorrectly: */ +#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__) +# define NO_DUMMY_DECL +#endif + +/* Maximum value for memLevel in deflateInit2 */ +#ifndef MAX_MEM_LEVEL +# ifdef MAXSEG_64K +# define MAX_MEM_LEVEL 8 +# else +# define MAX_MEM_LEVEL 9 +# endif +#endif + +/* Maximum value for windowBits in deflateInit2 and inflateInit2. + * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files + * created by gzip. (Files created by minigzip can still be extracted by + * gzip.) + */ +#ifndef MAX_WBITS +# define MAX_WBITS 15 /* 32K LZ77 window */ +#endif + +/* The memory requirements for deflate are (in bytes): + (1 << (windowBits+2)) + (1 << (memLevel+9)) + that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values) + plus a few kilobytes for small objects. For example, if you want to reduce + the default memory requirements from 256K to 128K, compile with + make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7" + Of course this will generally degrade compression (there's no free lunch). + + The memory requirements for inflate are (in bytes) 1 << windowBits + that is, 32K for windowBits=15 (default value) plus a few kilobytes + for small objects. +*/ + + /* Type declarations */ + +#ifndef OF /* function prototypes */ +# ifdef STDC +# define OF(args) args +# else +# define OF(args) () +# endif +#endif + +/* The following definitions for FAR are needed only for MSDOS mixed + * model programming (small or medium model with some far allocations). + * This was tested only with MSC; for other MSDOS compilers you may have + * to define NO_MEMCPY in zutil.h. If you don't need the mixed model, + * just define FAR to be empty. + */ +#ifdef SYS16BIT +# if defined(M_I86SM) || defined(M_I86MM) + /* MSC small or medium model */ +# define SMALL_MEDIUM +# ifdef _MSC_VER +# define FAR _far +# else +# define FAR far +# endif +# endif +# if (defined(__SMALL__) || defined(__MEDIUM__)) + /* Turbo C small or medium model */ +# define SMALL_MEDIUM +# ifdef __BORLANDC__ +# define FAR _far +# else +# define FAR far +# endif +# endif +#endif + +#if defined(WINDOWS) || defined(WIN32) + /* If building or using zlib as a DLL, define ZLIB_DLL. + * This is not mandatory, but it offers a little performance increase. + */ +# ifdef ZLIB_DLL +# if defined(WIN32) && (!defined(__BORLANDC__) || (__BORLANDC__ >= 0x500)) +# ifdef ZLIB_INTERNAL +# define ZEXTERN extern __declspec(dllexport) +# else +# define ZEXTERN extern __declspec(dllimport) +# endif +# endif +# endif /* ZLIB_DLL */ + /* If building or using zlib with the WINAPI/WINAPIV calling convention, + * define ZLIB_WINAPI. + * Caution: the standard ZLIB1.DLL is NOT compiled using ZLIB_WINAPI. + */ +# ifdef ZLIB_WINAPI +# ifdef FAR +# undef FAR +# endif +# include <windows.h> + /* No need for _export, use ZLIB.DEF instead. */ + /* For complete Windows compatibility, use WINAPI, not __stdcall. */ +# define ZEXPORT WINAPI +# ifdef WIN32 +# define ZEXPORTVA WINAPIV +# else +# define ZEXPORTVA FAR CDECL +# endif +# endif +#endif + +#if defined (__BEOS__) +# ifdef ZLIB_DLL +# ifdef ZLIB_INTERNAL +# define ZEXPORT __declspec(dllexport) +# define ZEXPORTVA __declspec(dllexport) +# else +# define ZEXPORT __declspec(dllimport) +# define ZEXPORTVA __declspec(dllimport) +# endif +# endif +#endif + +#ifndef ZEXTERN +# define ZEXTERN extern +#endif +#ifndef ZEXPORT +# define ZEXPORT +#endif +#ifndef ZEXPORTVA +# define ZEXPORTVA +#endif + +#ifndef FAR +# define FAR +#endif + +#if !defined(__MACTYPES__) +typedef unsigned char Byte; /* 8 bits */ +#endif +typedef unsigned int uInt; /* 16 bits or more */ +typedef unsigned long uLong; /* 32 bits or more */ + +#ifdef SMALL_MEDIUM + /* Borland C/C++ and some old MSC versions ignore FAR inside typedef */ +# define Bytef Byte FAR +#else + typedef Byte FAR Bytef; +#endif +typedef char FAR charf; +typedef int FAR intf; +typedef uInt FAR uIntf; +typedef uLong FAR uLongf; + +#ifdef STDC + typedef void const *voidpc; + typedef void FAR *voidpf; + typedef void *voidp; +#else + typedef Byte const *voidpc; + typedef Byte FAR *voidpf; + typedef Byte *voidp; +#endif + +#if 1 /* was set to #if 1 by ./configure */ +# define Z_HAVE_UNISTD_H +#endif + +#ifdef STDC +# include <sys/types.h> /* for off_t */ +#endif + +/* a little trick to accommodate both "#define _LARGEFILE64_SOURCE" and + * "#define _LARGEFILE64_SOURCE 1" as requesting 64-bit operations, (even + * though the former does not conform to the LFS document), but considering + * both "#undef _LARGEFILE64_SOURCE" and "#define _LARGEFILE64_SOURCE 0" as + * equivalently requesting no 64-bit operations + */ +#if -_LARGEFILE64_SOURCE - -1 == 1 +# undef _LARGEFILE64_SOURCE +#endif + +#if defined(Z_HAVE_UNISTD_H) || defined(_LARGEFILE64_SOURCE) +# include <unistd.h> /* for SEEK_* and off_t */ +# ifdef VMS +# include <unixio.h> /* for off_t */ +# endif +# ifndef z_off_t +# define z_off_t off_t +# endif +#endif + +#ifndef SEEK_SET +# define SEEK_SET 0 /* Seek from beginning of file. */ +# define SEEK_CUR 1 /* Seek from current position. */ +# define SEEK_END 2 /* Set file pointer to EOF plus "offset" */ +#endif + +#ifndef z_off_t +# define z_off_t long +#endif + +#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0 +# define z_off64_t off64_t +#else +# define z_off64_t z_off_t +#endif + +#if defined(__OS400__) +# define NO_vsnprintf +#endif + +#if defined(__MVS__) +# define NO_vsnprintf +#endif + +/* MVS linker does not support external names larger than 8 bytes */ +#if defined(__MVS__) + #pragma map(deflateInit_,"DEIN") + #pragma map(deflateInit2_,"DEIN2") + #pragma map(deflateEnd,"DEEND") + #pragma map(deflateBound,"DEBND") + #pragma map(inflateInit_,"ININ") + #pragma map(inflateInit2_,"ININ2") + #pragma map(inflateEnd,"INEND") + #pragma map(inflateSync,"INSY") + #pragma map(inflateSetDictionary,"INSEDI") + #pragma map(compressBound,"CMBND") + #pragma map(inflate_table,"INTABL") + #pragma map(inflate_fast,"INFA") + #pragma map(inflate_copyright,"INCOPY") +#endif + +#endif /* ZCONF_H */ diff --git a/system/include/zlib.h b/system/include/zlib.h new file mode 100644 index 00000000..bfbba83e --- /dev/null +++ b/system/include/zlib.h @@ -0,0 +1,1613 @@ +/* zlib.h -- interface of the 'zlib' general purpose compression library + version 1.2.5, April 19th, 2010 + + Copyright (C) 1995-2010 Jean-loup Gailly and Mark Adler + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. + + Jean-loup Gailly Mark Adler + jloup@gzip.org madler@alumni.caltech.edu + + + The data format used by the zlib library is described by RFCs (Request for + Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt + (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format). +*/ + +#ifndef ZLIB_H +#define ZLIB_H + +#include "zconf.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define ZLIB_VERSION "1.2.5" +#define ZLIB_VERNUM 0x1250 +#define ZLIB_VER_MAJOR 1 +#define ZLIB_VER_MINOR 2 +#define ZLIB_VER_REVISION 5 +#define ZLIB_VER_SUBREVISION 0 + +/* + The 'zlib' compression library provides in-memory compression and + decompression functions, including integrity checks of the uncompressed data. + This version of the library supports only one compression method (deflation) + but other algorithms will be added later and will have the same stream + interface. + + Compression can be done in a single step if the buffers are large enough, + or can be done by repeated calls of the compression function. In the latter + case, the application must provide more input and/or consume the output + (providing more output space) before each call. + + The compressed data format used by default by the in-memory functions is + the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped + around a deflate stream, which is itself documented in RFC 1951. + + The library also supports reading and writing files in gzip (.gz) format + with an interface similar to that of stdio using the functions that start + with "gz". The gzip format is different from the zlib format. gzip is a + gzip wrapper, documented in RFC 1952, wrapped around a deflate stream. + + This library can optionally read and write gzip streams in memory as well. + + The zlib format was designed to be compact and fast for use in memory + and on communications channels. The gzip format was designed for single- + file compression on file systems, has a larger header than zlib to maintain + directory information, and uses a different, slower check method than zlib. + + The library does not install any signal handler. The decoder checks + the consistency of the compressed data, so the library should never crash + even in case of corrupted input. +*/ + +typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size)); +typedef void (*free_func) OF((voidpf opaque, voidpf address)); + +struct internal_state; + +typedef struct z_stream_s { + Bytef *next_in; /* next input byte */ + uInt avail_in; /* number of bytes available at next_in */ + uLong total_in; /* total nb of input bytes read so far */ + + Bytef *next_out; /* next output byte should be put there */ + uInt avail_out; /* remaining free space at next_out */ + uLong total_out; /* total nb of bytes output so far */ + + char *msg; /* last error message, NULL if no error */ + struct internal_state FAR *state; /* not visible by applications */ + + alloc_func zalloc; /* used to allocate the internal state */ + free_func zfree; /* used to free the internal state */ + voidpf opaque; /* private data object passed to zalloc and zfree */ + + int data_type; /* best guess about the data type: binary or text */ + uLong adler; /* adler32 value of the uncompressed data */ + uLong reserved; /* reserved for future use */ +} z_stream; + +typedef z_stream FAR *z_streamp; + +/* + gzip header information passed to and from zlib routines. See RFC 1952 + for more details on the meanings of these fields. +*/ +typedef struct gz_header_s { + int text; /* true if compressed data believed to be text */ + uLong time; /* modification time */ + int xflags; /* extra flags (not used when writing a gzip file) */ + int os; /* operating system */ + Bytef *extra; /* pointer to extra field or Z_NULL if none */ + uInt extra_len; /* extra field length (valid if extra != Z_NULL) */ + uInt extra_max; /* space at extra (only when reading header) */ + Bytef *name; /* pointer to zero-terminated file name or Z_NULL */ + uInt name_max; /* space at name (only when reading header) */ + Bytef *comment; /* pointer to zero-terminated comment or Z_NULL */ + uInt comm_max; /* space at comment (only when reading header) */ + int hcrc; /* true if there was or will be a header crc */ + int done; /* true when done reading gzip header (not used + when writing a gzip file) */ +} gz_header; + +typedef gz_header FAR *gz_headerp; + +/* + The application must update next_in and avail_in when avail_in has dropped + to zero. It must update next_out and avail_out when avail_out has dropped + to zero. The application must initialize zalloc, zfree and opaque before + calling the init function. All other fields are set by the compression + library and must not be updated by the application. + + The opaque value provided by the application will be passed as the first + parameter for calls of zalloc and zfree. This can be useful for custom + memory management. The compression library attaches no meaning to the + opaque value. + + zalloc must return Z_NULL if there is not enough memory for the object. + If zlib is used in a multi-threaded application, zalloc and zfree must be + thread safe. + + On 16-bit systems, the functions zalloc and zfree must be able to allocate + exactly 65536 bytes, but will not be required to allocate more than this if + the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS, pointers + returned by zalloc for objects of exactly 65536 bytes *must* have their + offset normalized to zero. The default allocation function provided by this + library ensures this (see zutil.c). To reduce memory requirements and avoid + any allocation of 64K objects, at the expense of compression ratio, compile + the library with -DMAX_WBITS=14 (see zconf.h). + + The fields total_in and total_out can be used for statistics or progress + reports. After compression, total_in holds the total size of the + uncompressed data and may be saved for use in the decompressor (particularly + if the decompressor wants to decompress everything in a single step). +*/ + + /* constants */ + +#define Z_NO_FLUSH 0 +#define Z_PARTIAL_FLUSH 1 +#define Z_SYNC_FLUSH 2 +#define Z_FULL_FLUSH 3 +#define Z_FINISH 4 +#define Z_BLOCK 5 +#define Z_TREES 6 +/* Allowed flush values; see deflate() and inflate() below for details */ + +#define Z_OK 0 +#define Z_STREAM_END 1 +#define Z_NEED_DICT 2 +#define Z_ERRNO (-1) +#define Z_STREAM_ERROR (-2) +#define Z_DATA_ERROR (-3) +#define Z_MEM_ERROR (-4) +#define Z_BUF_ERROR (-5) +#define Z_VERSION_ERROR (-6) +/* Return codes for the compression/decompression functions. Negative values + * are errors, positive values are used for special but normal events. + */ + +#define Z_NO_COMPRESSION 0 +#define Z_BEST_SPEED 1 +#define Z_BEST_COMPRESSION 9 +#define Z_DEFAULT_COMPRESSION (-1) +/* compression levels */ + +#define Z_FILTERED 1 +#define Z_HUFFMAN_ONLY 2 +#define Z_RLE 3 +#define Z_FIXED 4 +#define Z_DEFAULT_STRATEGY 0 +/* compression strategy; see deflateInit2() below for details */ + +#define Z_BINARY 0 +#define Z_TEXT 1 +#define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */ +#define Z_UNKNOWN 2 +/* Possible values of the data_type field (though see inflate()) */ + +#define Z_DEFLATED 8 +/* The deflate compression method (the only one supported in this version) */ + +#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */ + +#define zlib_version zlibVersion() +/* for compatibility with versions < 1.0.2 */ + + + /* basic functions */ + +ZEXTERN const char * ZEXPORT zlibVersion OF((void)); +/* The application can compare zlibVersion and ZLIB_VERSION for consistency. + If the first character differs, the library code actually used is not + compatible with the zlib.h header file used by the application. This check + is automatically made by deflateInit and inflateInit. + */ + +/* +ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level)); + + Initializes the internal stream state for compression. The fields + zalloc, zfree and opaque must be initialized before by the caller. If + zalloc and zfree are set to Z_NULL, deflateInit updates them to use default + allocation functions. + + The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9: + 1 gives best speed, 9 gives best compression, 0 gives no compression at all + (the input data is simply copied a block at a time). Z_DEFAULT_COMPRESSION + requests a default compromise between speed and compression (currently + equivalent to level 6). + + deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_STREAM_ERROR if level is not a valid compression level, or + Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible + with the version assumed by the caller (ZLIB_VERSION). msg is set to null + if there is no error message. deflateInit does not perform any compression: + this will be done by deflate(). +*/ + + +ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush)); +/* + deflate compresses as much data as possible, and stops when the input + buffer becomes empty or the output buffer becomes full. It may introduce + some output latency (reading input without producing any output) except when + forced to flush. + + The detailed semantics are as follows. deflate performs one or both of the + following actions: + + - Compress more input starting at next_in and update next_in and avail_in + accordingly. If not all input can be processed (because there is not + enough room in the output buffer), next_in and avail_in are updated and + processing will resume at this point for the next call of deflate(). + + - Provide more output starting at next_out and update next_out and avail_out + accordingly. This action is forced if the parameter flush is non zero. + Forcing flush frequently degrades the compression ratio, so this parameter + should be set only when necessary (in interactive applications). Some + output may be provided even if flush is not set. + + Before the call of deflate(), the application should ensure that at least + one of the actions is possible, by providing more input and/or consuming more + output, and updating avail_in or avail_out accordingly; avail_out should + never be zero before the call. The application can consume the compressed + output when it wants, for example when the output buffer is full (avail_out + == 0), or after each call of deflate(). If deflate returns Z_OK and with + zero avail_out, it must be called again after making room in the output + buffer because there might be more output pending. + + Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to + decide how much data to accumulate before producing output, in order to + maximize compression. + + If the parameter flush is set to Z_SYNC_FLUSH, all pending output is + flushed to the output buffer and the output is aligned on a byte boundary, so + that the decompressor can get all input data available so far. (In + particular avail_in is zero after the call if enough output space has been + provided before the call.) Flushing may degrade compression for some + compression algorithms and so it should be used only when necessary. This + completes the current deflate block and follows it with an empty stored block + that is three bits plus filler bits to the next byte, followed by four bytes + (00 00 ff ff). + + If flush is set to Z_PARTIAL_FLUSH, all pending output is flushed to the + output buffer, but the output is not aligned to a byte boundary. All of the + input data so far will be available to the decompressor, as for Z_SYNC_FLUSH. + This completes the current deflate block and follows it with an empty fixed + codes block that is 10 bits long. This assures that enough bytes are output + in order for the decompressor to finish the block before the empty fixed code + block. + + If flush is set to Z_BLOCK, a deflate block is completed and emitted, as + for Z_SYNC_FLUSH, but the output is not aligned on a byte boundary, and up to + seven bits of the current block are held to be written as the next byte after + the next deflate block is completed. In this case, the decompressor may not + be provided enough bits at this point in order to complete decompression of + the data provided so far to the compressor. It may need to wait for the next + block to be emitted. This is for advanced applications that need to control + the emission of deflate blocks. + + If flush is set to Z_FULL_FLUSH, all output is flushed as with + Z_SYNC_FLUSH, and the compression state is reset so that decompression can + restart from this point if previous compressed data has been damaged or if + random access is desired. Using Z_FULL_FLUSH too often can seriously degrade + compression. + + If deflate returns with avail_out == 0, this function must be called again + with the same value of the flush parameter and more output space (updated + avail_out), until the flush is complete (deflate returns with non-zero + avail_out). In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that + avail_out is greater than six to avoid repeated flush markers due to + avail_out == 0 on return. + + If the parameter flush is set to Z_FINISH, pending input is processed, + pending output is flushed and deflate returns with Z_STREAM_END if there was + enough output space; if deflate returns with Z_OK, this function must be + called again with Z_FINISH and more output space (updated avail_out) but no + more input data, until it returns with Z_STREAM_END or an error. After + deflate has returned Z_STREAM_END, the only possible operations on the stream + are deflateReset or deflateEnd. + + Z_FINISH can be used immediately after deflateInit if all the compression + is to be done in a single step. In this case, avail_out must be at least the + value returned by deflateBound (see below). If deflate does not return + Z_STREAM_END, then it must be called again as described above. + + deflate() sets strm->adler to the adler32 checksum of all input read + so far (that is, total_in bytes). + + deflate() may update strm->data_type if it can make a good guess about + the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered + binary. This field is only for information purposes and does not affect the + compression algorithm in any manner. + + deflate() returns Z_OK if some progress has been made (more input + processed or more output produced), Z_STREAM_END if all input has been + consumed and all output has been produced (only when flush is set to + Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example + if next_in or next_out was Z_NULL), Z_BUF_ERROR if no progress is possible + (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not + fatal, and deflate() can be called again with more input and more output + space to continue compressing. +*/ + + +ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm)); +/* + All dynamically allocated data structures for this stream are freed. + This function discards any unprocessed input and does not flush any pending + output. + + deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the + stream state was inconsistent, Z_DATA_ERROR if the stream was freed + prematurely (some input or output was discarded). In the error case, msg + may be set but then points to a static string (which must not be + deallocated). +*/ + + +/* +ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm)); + + Initializes the internal stream state for decompression. The fields + next_in, avail_in, zalloc, zfree and opaque must be initialized before by + the caller. If next_in is not Z_NULL and avail_in is large enough (the + exact value depends on the compression method), inflateInit determines the + compression method from the zlib header and allocates all data structures + accordingly; otherwise the allocation will be deferred to the first call of + inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to + use default allocation functions. + + inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_VERSION_ERROR if the zlib library version is incompatible with the + version assumed by the caller, or Z_STREAM_ERROR if the parameters are + invalid, such as a null pointer to the structure. msg is set to null if + there is no error message. inflateInit does not perform any decompression + apart from possibly reading the zlib header if present: actual decompression + will be done by inflate(). (So next_in and avail_in may be modified, but + next_out and avail_out are unused and unchanged.) The current implementation + of inflateInit() does not process any header information -- that is deferred + until inflate() is called. +*/ + + +ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush)); +/* + inflate decompresses as much data as possible, and stops when the input + buffer becomes empty or the output buffer becomes full. It may introduce + some output latency (reading input without producing any output) except when + forced to flush. + + The detailed semantics are as follows. inflate performs one or both of the + following actions: + + - Decompress more input starting at next_in and update next_in and avail_in + accordingly. If not all input can be processed (because there is not + enough room in the output buffer), next_in is updated and processing will + resume at this point for the next call of inflate(). + + - Provide more output starting at next_out and update next_out and avail_out + accordingly. inflate() provides as much output as possible, until there is + no more input data or no more space in the output buffer (see below about + the flush parameter). + + Before the call of inflate(), the application should ensure that at least + one of the actions is possible, by providing more input and/or consuming more + output, and updating the next_* and avail_* values accordingly. The + application can consume the uncompressed output when it wants, for example + when the output buffer is full (avail_out == 0), or after each call of + inflate(). If inflate returns Z_OK and with zero avail_out, it must be + called again after making room in the output buffer because there might be + more output pending. + + The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH, Z_FINISH, + Z_BLOCK, or Z_TREES. Z_SYNC_FLUSH requests that inflate() flush as much + output as possible to the output buffer. Z_BLOCK requests that inflate() + stop if and when it gets to the next deflate block boundary. When decoding + the zlib or gzip format, this will cause inflate() to return immediately + after the header and before the first block. When doing a raw inflate, + inflate() will go ahead and process the first block, and will return when it + gets to the end of that block, or when it runs out of data. + + The Z_BLOCK option assists in appending to or combining deflate streams. + Also to assist in this, on return inflate() will set strm->data_type to the + number of unused bits in the last byte taken from strm->next_in, plus 64 if + inflate() is currently decoding the last block in the deflate stream, plus + 128 if inflate() returned immediately after decoding an end-of-block code or + decoding the complete header up to just before the first byte of the deflate + stream. The end-of-block will not be indicated until all of the uncompressed + data from that block has been written to strm->next_out. The number of + unused bits may in general be greater than seven, except when bit 7 of + data_type is set, in which case the number of unused bits will be less than + eight. data_type is set as noted here every time inflate() returns for all + flush options, and so can be used to determine the amount of currently + consumed input in bits. + + The Z_TREES option behaves as Z_BLOCK does, but it also returns when the + end of each deflate block header is reached, before any actual data in that + block is decoded. This allows the caller to determine the length of the + deflate block header for later use in random access within a deflate block. + 256 is added to the value of strm->data_type when inflate() returns + immediately after reaching the end of the deflate block header. + + inflate() should normally be called until it returns Z_STREAM_END or an + error. However if all decompression is to be performed in a single step (a + single call of inflate), the parameter flush should be set to Z_FINISH. In + this case all pending input is processed and all pending output is flushed; + avail_out must be large enough to hold all the uncompressed data. (The size + of the uncompressed data may have been saved by the compressor for this + purpose.) The next operation on this stream must be inflateEnd to deallocate + the decompression state. The use of Z_FINISH is never required, but can be + used to inform inflate that a faster approach may be used for the single + inflate() call. + + In this implementation, inflate() always flushes as much output as + possible to the output buffer, and always uses the faster approach on the + first call. So the only effect of the flush parameter in this implementation + is on the return value of inflate(), as noted below, or when it returns early + because Z_BLOCK or Z_TREES is used. + + If a preset dictionary is needed after this call (see inflateSetDictionary + below), inflate sets strm->adler to the adler32 checksum of the dictionary + chosen by the compressor and returns Z_NEED_DICT; otherwise it sets + strm->adler to the adler32 checksum of all output produced so far (that is, + total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described + below. At the end of the stream, inflate() checks that its computed adler32 + checksum is equal to that saved by the compressor and returns Z_STREAM_END + only if the checksum is correct. + + inflate() can decompress and check either zlib-wrapped or gzip-wrapped + deflate data. The header type is detected automatically, if requested when + initializing with inflateInit2(). Any information contained in the gzip + header is not retained, so applications that need that information should + instead use raw inflate, see inflateInit2() below, or inflateBack() and + perform their own processing of the gzip header and trailer. + + inflate() returns Z_OK if some progress has been made (more input processed + or more output produced), Z_STREAM_END if the end of the compressed data has + been reached and all uncompressed output has been produced, Z_NEED_DICT if a + preset dictionary is needed at this point, Z_DATA_ERROR if the input data was + corrupted (input stream not conforming to the zlib format or incorrect check + value), Z_STREAM_ERROR if the stream structure was inconsistent (for example + next_in or next_out was Z_NULL), Z_MEM_ERROR if there was not enough memory, + Z_BUF_ERROR if no progress is possible or if there was not enough room in the + output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and + inflate() can be called again with more input and more output space to + continue decompressing. If Z_DATA_ERROR is returned, the application may + then call inflateSync() to look for a good compression block if a partial + recovery of the data is desired. +*/ + + +ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm)); +/* + All dynamically allocated data structures for this stream are freed. + This function discards any unprocessed input and does not flush any pending + output. + + inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state + was inconsistent. In the error case, msg may be set but then points to a + static string (which must not be deallocated). +*/ + + + /* Advanced functions */ + +/* + The following functions are needed only in some special applications. +*/ + +/* +ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm, + int level, + int method, + int windowBits, + int memLevel, + int strategy)); + + This is another version of deflateInit with more compression options. The + fields next_in, zalloc, zfree and opaque must be initialized before by the + caller. + + The method parameter is the compression method. It must be Z_DEFLATED in + this version of the library. + + The windowBits parameter is the base two logarithm of the window size + (the size of the history buffer). It should be in the range 8..15 for this + version of the library. Larger values of this parameter result in better + compression at the expense of memory usage. The default value is 15 if + deflateInit is used instead. + + windowBits can also be -8..-15 for raw deflate. In this case, -windowBits + determines the window size. deflate() will then generate raw deflate data + with no zlib header or trailer, and will not compute an adler32 check value. + + windowBits can also be greater than 15 for optional gzip encoding. Add + 16 to windowBits to write a simple gzip header and trailer around the + compressed data instead of a zlib wrapper. The gzip header will have no + file name, no extra data, no comment, no modification time (set to zero), no + header crc, and the operating system will be set to 255 (unknown). If a + gzip stream is being written, strm->adler is a crc32 instead of an adler32. + + The memLevel parameter specifies how much memory should be allocated + for the internal compression state. memLevel=1 uses minimum memory but is + slow and reduces compression ratio; memLevel=9 uses maximum memory for + optimal speed. The default value is 8. See zconf.h for total memory usage + as a function of windowBits and memLevel. + + The strategy parameter is used to tune the compression algorithm. Use the + value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a + filter (or predictor), Z_HUFFMAN_ONLY to force Huffman encoding only (no + string match), or Z_RLE to limit match distances to one (run-length + encoding). Filtered data consists mostly of small values with a somewhat + random distribution. In this case, the compression algorithm is tuned to + compress them better. The effect of Z_FILTERED is to force more Huffman + coding and less string matching; it is somewhat intermediate between + Z_DEFAULT_STRATEGY and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as + fast as Z_HUFFMAN_ONLY, but give better compression for PNG image data. The + strategy parameter only affects the compression ratio but not the + correctness of the compressed output even if it is not set appropriately. + Z_FIXED prevents the use of dynamic Huffman codes, allowing for a simpler + decoder for special applications. + + deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_STREAM_ERROR if any parameter is invalid (such as an invalid + method), or Z_VERSION_ERROR if the zlib library version (zlib_version) is + incompatible with the version assumed by the caller (ZLIB_VERSION). msg is + set to null if there is no error message. deflateInit2 does not perform any + compression: this will be done by deflate(). +*/ + +ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm, + const Bytef *dictionary, + uInt dictLength)); +/* + Initializes the compression dictionary from the given byte sequence + without producing any compressed output. This function must be called + immediately after deflateInit, deflateInit2 or deflateReset, before any call + of deflate. The compressor and decompressor must use exactly the same + dictionary (see inflateSetDictionary). + + The dictionary should consist of strings (byte sequences) that are likely + to be encountered later in the data to be compressed, with the most commonly + used strings preferably put towards the end of the dictionary. Using a + dictionary is most useful when the data to be compressed is short and can be + predicted with good accuracy; the data can then be compressed better than + with the default empty dictionary. + + Depending on the size of the compression data structures selected by + deflateInit or deflateInit2, a part of the dictionary may in effect be + discarded, for example if the dictionary is larger than the window size + provided in deflateInit or deflateInit2. Thus the strings most likely to be + useful should be put at the end of the dictionary, not at the front. In + addition, the current implementation of deflate will use at most the window + size minus 262 bytes of the provided dictionary. + + Upon return of this function, strm->adler is set to the adler32 value + of the dictionary; the decompressor may later use this value to determine + which dictionary has been used by the compressor. (The adler32 value + applies to the whole dictionary even if only a subset of the dictionary is + actually used by the compressor.) If a raw deflate was requested, then the + adler32 value is not computed and strm->adler is not set. + + deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a + parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is + inconsistent (for example if deflate has already been called for this stream + or if the compression method is bsort). deflateSetDictionary does not + perform any compression: this will be done by deflate(). +*/ + +ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest, + z_streamp source)); +/* + Sets the destination stream as a complete copy of the source stream. + + This function can be useful when several compression strategies will be + tried, for example when there are several ways of pre-processing the input + data with a filter. The streams that will be discarded should then be freed + by calling deflateEnd. Note that deflateCopy duplicates the internal + compression state which can be quite large, so this strategy is slow and can + consume lots of memory. + + deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_STREAM_ERROR if the source stream state was inconsistent + (such as zalloc being Z_NULL). msg is left unchanged in both source and + destination. +*/ + +ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm)); +/* + This function is equivalent to deflateEnd followed by deflateInit, + but does not free and reallocate all the internal compression state. The + stream will keep the same compression level and any other attributes that + may have been set by deflateInit2. + + deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL). +*/ + +ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm, + int level, + int strategy)); +/* + Dynamically update the compression level and compression strategy. The + interpretation of level and strategy is as in deflateInit2. This can be + used to switch between compression and straight copy of the input data, or + to switch to a different kind of input data requiring a different strategy. + If the compression level is changed, the input available so far is + compressed with the old level (and may be flushed); the new level will take + effect only at the next call of deflate(). + + Before the call of deflateParams, the stream state must be set as for + a call of deflate(), since the currently available input may have to be + compressed and flushed. In particular, strm->avail_out must be non-zero. + + deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source + stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR if + strm->avail_out was zero. +*/ + +ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm, + int good_length, + int max_lazy, + int nice_length, + int max_chain)); +/* + Fine tune deflate's internal compression parameters. This should only be + used by someone who understands the algorithm used by zlib's deflate for + searching for the best matching string, and even then only by the most + fanatic optimizer trying to squeeze out the last compressed bit for their + specific input data. Read the deflate.c source code for the meaning of the + max_lazy, good_length, nice_length, and max_chain parameters. + + deflateTune() can be called after deflateInit() or deflateInit2(), and + returns Z_OK on success, or Z_STREAM_ERROR for an invalid deflate stream. + */ + +ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm, + uLong sourceLen)); +/* + deflateBound() returns an upper bound on the compressed size after + deflation of sourceLen bytes. It must be called after deflateInit() or + deflateInit2(), and after deflateSetHeader(), if used. This would be used + to allocate an output buffer for deflation in a single pass, and so would be + called before deflate(). +*/ + +ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm, + int bits, + int value)); +/* + deflatePrime() inserts bits in the deflate output stream. The intent + is that this function is used to start off the deflate output with the bits + leftover from a previous deflate stream when appending to it. As such, this + function can only be used for raw deflate, and must be used before the first + deflate() call after a deflateInit2() or deflateReset(). bits must be less + than or equal to 16, and that many of the least significant bits of value + will be inserted in the output. + + deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm, + gz_headerp head)); +/* + deflateSetHeader() provides gzip header information for when a gzip + stream is requested by deflateInit2(). deflateSetHeader() may be called + after deflateInit2() or deflateReset() and before the first call of + deflate(). The text, time, os, extra field, name, and comment information + in the provided gz_header structure are written to the gzip header (xflag is + ignored -- the extra flags are set according to the compression level). The + caller must assure that, if not Z_NULL, name and comment are terminated with + a zero byte, and that if extra is not Z_NULL, that extra_len bytes are + available there. If hcrc is true, a gzip header crc is included. Note that + the current versions of the command-line version of gzip (up through version + 1.3.x) do not support header crc's, and will report that it is a "multi-part + gzip file" and give up. + + If deflateSetHeader is not used, the default gzip header has text false, + the time set to zero, and os set to 255, with no extra, name, or comment + fields. The gzip header is returned to the default state by deflateReset(). + + deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +/* +ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm, + int windowBits)); + + This is another version of inflateInit with an extra parameter. The + fields next_in, avail_in, zalloc, zfree and opaque must be initialized + before by the caller. + + The windowBits parameter is the base two logarithm of the maximum window + size (the size of the history buffer). It should be in the range 8..15 for + this version of the library. The default value is 15 if inflateInit is used + instead. windowBits must be greater than or equal to the windowBits value + provided to deflateInit2() while compressing, or it must be equal to 15 if + deflateInit2() was not used. If a compressed stream with a larger window + size is given as input, inflate() will return with the error code + Z_DATA_ERROR instead of trying to allocate a larger window. + + windowBits can also be zero to request that inflate use the window size in + the zlib header of the compressed stream. + + windowBits can also be -8..-15 for raw inflate. In this case, -windowBits + determines the window size. inflate() will then process raw deflate data, + not looking for a zlib or gzip header, not generating a check value, and not + looking for any check values for comparison at the end of the stream. This + is for use with other formats that use the deflate compressed data format + such as zip. Those formats provide their own check values. If a custom + format is developed using the raw deflate format for compressed data, it is + recommended that a check value such as an adler32 or a crc32 be applied to + the uncompressed data as is done in the zlib, gzip, and zip formats. For + most applications, the zlib format should be used as is. Note that comments + above on the use in deflateInit2() applies to the magnitude of windowBits. + + windowBits can also be greater than 15 for optional gzip decoding. Add + 32 to windowBits to enable zlib and gzip decoding with automatic header + detection, or add 16 to decode only the gzip format (the zlib format will + return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is a + crc32 instead of an adler32. + + inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_VERSION_ERROR if the zlib library version is incompatible with the + version assumed by the caller, or Z_STREAM_ERROR if the parameters are + invalid, such as a null pointer to the structure. msg is set to null if + there is no error message. inflateInit2 does not perform any decompression + apart from possibly reading the zlib header if present: actual decompression + will be done by inflate(). (So next_in and avail_in may be modified, but + next_out and avail_out are unused and unchanged.) The current implementation + of inflateInit2() does not process any header information -- that is + deferred until inflate() is called. +*/ + +ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm, + const Bytef *dictionary, + uInt dictLength)); +/* + Initializes the decompression dictionary from the given uncompressed byte + sequence. This function must be called immediately after a call of inflate, + if that call returned Z_NEED_DICT. The dictionary chosen by the compressor + can be determined from the adler32 value returned by that call of inflate. + The compressor and decompressor must use exactly the same dictionary (see + deflateSetDictionary). For raw inflate, this function can be called + immediately after inflateInit2() or inflateReset() and before any call of + inflate() to set the dictionary. The application must insure that the + dictionary that was used for compression is provided. + + inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a + parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is + inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the + expected one (incorrect adler32 value). inflateSetDictionary does not + perform any decompression: this will be done by subsequent calls of + inflate(). +*/ + +ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm)); +/* + Skips invalid compressed data until a full flush point (see above the + description of deflate with Z_FULL_FLUSH) can be found, or until all + available input is skipped. No output is provided. + + inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR + if no more input was provided, Z_DATA_ERROR if no flush point has been + found, or Z_STREAM_ERROR if the stream structure was inconsistent. In the + success case, the application may save the current current value of total_in + which indicates where valid compressed data was found. In the error case, + the application may repeatedly call inflateSync, providing more input each + time, until success or end of the input data. +*/ + +ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest, + z_streamp source)); +/* + Sets the destination stream as a complete copy of the source stream. + + This function can be useful when randomly accessing a large stream. The + first pass through the stream can periodically record the inflate state, + allowing restarting inflate at those points when randomly accessing the + stream. + + inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_STREAM_ERROR if the source stream state was inconsistent + (such as zalloc being Z_NULL). msg is left unchanged in both source and + destination. +*/ + +ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm)); +/* + This function is equivalent to inflateEnd followed by inflateInit, + but does not free and reallocate all the internal decompression state. The + stream will keep attributes that may have been set by inflateInit2. + + inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL). +*/ + +ZEXTERN int ZEXPORT inflateReset2 OF((z_streamp strm, + int windowBits)); +/* + This function is the same as inflateReset, but it also permits changing + the wrap and window size requests. The windowBits parameter is interpreted + the same as it is for inflateInit2. + + inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent (such as zalloc or state being Z_NULL), or if + the windowBits parameter is invalid. +*/ + +ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm, + int bits, + int value)); +/* + This function inserts bits in the inflate input stream. The intent is + that this function is used to start inflating at a bit position in the + middle of a byte. The provided bits will be used before any bytes are used + from next_in. This function should only be used with raw inflate, and + should be used before the first inflate() call after inflateInit2() or + inflateReset(). bits must be less than or equal to 16, and that many of the + least significant bits of value will be inserted in the input. + + If bits is negative, then the input stream bit buffer is emptied. Then + inflatePrime() can be called again to put bits in the buffer. This is used + to clear out bits leftover after feeding inflate a block description prior + to feeding inflate codes. + + inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +ZEXTERN long ZEXPORT inflateMark OF((z_streamp strm)); +/* + This function returns two values, one in the lower 16 bits of the return + value, and the other in the remaining upper bits, obtained by shifting the + return value down 16 bits. If the upper value is -1 and the lower value is + zero, then inflate() is currently decoding information outside of a block. + If the upper value is -1 and the lower value is non-zero, then inflate is in + the middle of a stored block, with the lower value equaling the number of + bytes from the input remaining to copy. If the upper value is not -1, then + it is the number of bits back from the current bit position in the input of + the code (literal or length/distance pair) currently being processed. In + that case the lower value is the number of bytes already emitted for that + code. + + A code is being processed if inflate is waiting for more input to complete + decoding of the code, or if it has completed decoding but is waiting for + more output space to write the literal or match data. + + inflateMark() is used to mark locations in the input data for random + access, which may be at bit positions, and to note those cases where the + output of a code may span boundaries of random access blocks. The current + location in the input stream can be determined from avail_in and data_type + as noted in the description for the Z_BLOCK flush parameter for inflate. + + inflateMark returns the value noted above or -1 << 16 if the provided + source stream state was inconsistent. +*/ + +ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm, + gz_headerp head)); +/* + inflateGetHeader() requests that gzip header information be stored in the + provided gz_header structure. inflateGetHeader() may be called after + inflateInit2() or inflateReset(), and before the first call of inflate(). + As inflate() processes the gzip stream, head->done is zero until the header + is completed, at which time head->done is set to one. If a zlib stream is + being decoded, then head->done is set to -1 to indicate that there will be + no gzip header information forthcoming. Note that Z_BLOCK or Z_TREES can be + used to force inflate() to return immediately after header processing is + complete and before any actual data is decompressed. + + The text, time, xflags, and os fields are filled in with the gzip header + contents. hcrc is set to true if there is a header CRC. (The header CRC + was valid if done is set to one.) If extra is not Z_NULL, then extra_max + contains the maximum number of bytes to write to extra. Once done is true, + extra_len contains the actual extra field length, and extra contains the + extra field, or that field truncated if extra_max is less than extra_len. + If name is not Z_NULL, then up to name_max characters are written there, + terminated with a zero unless the length is greater than name_max. If + comment is not Z_NULL, then up to comm_max characters are written there, + terminated with a zero unless the length is greater than comm_max. When any + of extra, name, or comment are not Z_NULL and the respective field is not + present in the header, then that field is set to Z_NULL to signal its + absence. This allows the use of deflateSetHeader() with the returned + structure to duplicate the header. However if those fields are set to + allocated memory, then the application will need to save those pointers + elsewhere so that they can be eventually freed. + + If inflateGetHeader is not used, then the header information is simply + discarded. The header is always checked for validity, including the header + CRC if present. inflateReset() will reset the process to discard the header + information. The application would need to call inflateGetHeader() again to + retrieve the header from the next gzip stream. + + inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source + stream state was inconsistent. +*/ + +/* +ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits, + unsigned char FAR *window)); + + Initialize the internal stream state for decompression using inflateBack() + calls. The fields zalloc, zfree and opaque in strm must be initialized + before the call. If zalloc and zfree are Z_NULL, then the default library- + derived memory allocation routines are used. windowBits is the base two + logarithm of the window size, in the range 8..15. window is a caller + supplied buffer of that size. Except for special applications where it is + assured that deflate was used with small window sizes, windowBits must be 15 + and a 32K byte window must be supplied to be able to decompress general + deflate streams. + + See inflateBack() for the usage of these routines. + + inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of + the paramaters are invalid, Z_MEM_ERROR if the internal state could not be + allocated, or Z_VERSION_ERROR if the version of the library does not match + the version of the header file. +*/ + +typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *)); +typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned)); + +ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm, + in_func in, void FAR *in_desc, + out_func out, void FAR *out_desc)); +/* + inflateBack() does a raw inflate with a single call using a call-back + interface for input and output. This is more efficient than inflate() for + file i/o applications in that it avoids copying between the output and the + sliding window by simply making the window itself the output buffer. This + function trusts the application to not change the output buffer passed by + the output function, at least until inflateBack() returns. + + inflateBackInit() must be called first to allocate the internal state + and to initialize the state with the user-provided window buffer. + inflateBack() may then be used multiple times to inflate a complete, raw + deflate stream with each call. inflateBackEnd() is then called to free the + allocated state. + + A raw deflate stream is one with no zlib or gzip header or trailer. + This routine would normally be used in a utility that reads zip or gzip + files and writes out uncompressed files. The utility would decode the + header and process the trailer on its own, hence this routine expects only + the raw deflate stream to decompress. This is different from the normal + behavior of inflate(), which expects either a zlib or gzip header and + trailer around the deflate stream. + + inflateBack() uses two subroutines supplied by the caller that are then + called by inflateBack() for input and output. inflateBack() calls those + routines until it reads a complete deflate stream and writes out all of the + uncompressed data, or until it encounters an error. The function's + parameters and return types are defined above in the in_func and out_func + typedefs. inflateBack() will call in(in_desc, &buf) which should return the + number of bytes of provided input, and a pointer to that input in buf. If + there is no input available, in() must return zero--buf is ignored in that + case--and inflateBack() will return a buffer error. inflateBack() will call + out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. out() + should return zero on success, or non-zero on failure. If out() returns + non-zero, inflateBack() will return with an error. Neither in() nor out() + are permitted to change the contents of the window provided to + inflateBackInit(), which is also the buffer that out() uses to write from. + The length written by out() will be at most the window size. Any non-zero + amount of input may be provided by in(). + + For convenience, inflateBack() can be provided input on the first call by + setting strm->next_in and strm->avail_in. If that input is exhausted, then + in() will be called. Therefore strm->next_in must be initialized before + calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called + immediately for input. If strm->next_in is not Z_NULL, then strm->avail_in + must also be initialized, and then if strm->avail_in is not zero, input will + initially be taken from strm->next_in[0 .. strm->avail_in - 1]. + + The in_desc and out_desc parameters of inflateBack() is passed as the + first parameter of in() and out() respectively when they are called. These + descriptors can be optionally used to pass any information that the caller- + supplied in() and out() functions need to do their job. + + On return, inflateBack() will set strm->next_in and strm->avail_in to + pass back any unused input that was provided by the last in() call. The + return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR + if in() or out() returned an error, Z_DATA_ERROR if there was a format error + in the deflate stream (in which case strm->msg is set to indicate the nature + of the error), or Z_STREAM_ERROR if the stream was not properly initialized. + In the case of Z_BUF_ERROR, an input or output error can be distinguished + using strm->next_in which will be Z_NULL only if in() returned an error. If + strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning + non-zero. (in() will always be called before out(), so strm->next_in is + assured to be defined if out() returns non-zero.) Note that inflateBack() + cannot return Z_OK. +*/ + +ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm)); +/* + All memory allocated by inflateBackInit() is freed. + + inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream + state was inconsistent. +*/ + +ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void)); +/* Return flags indicating compile-time options. + + Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other: + 1.0: size of uInt + 3.2: size of uLong + 5.4: size of voidpf (pointer) + 7.6: size of z_off_t + + Compiler, assembler, and debug options: + 8: DEBUG + 9: ASMV or ASMINF -- use ASM code + 10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention + 11: 0 (reserved) + + One-time table building (smaller code, but not thread-safe if true): + 12: BUILDFIXED -- build static block decoding tables when needed + 13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed + 14,15: 0 (reserved) + + Library content (indicates missing functionality): + 16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking + deflate code when not needed) + 17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect + and decode gzip streams (to avoid linking crc code) + 18-19: 0 (reserved) + + Operation variations (changes in library functionality): + 20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate + 21: FASTEST -- deflate algorithm with only one, lowest compression level + 22,23: 0 (reserved) + + The sprintf variant used by gzprintf (zero is best): + 24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format + 25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure! + 26: 0 = returns value, 1 = void -- 1 means inferred string length returned + + Remainder: + 27-31: 0 (reserved) + */ + + + /* utility functions */ + +/* + The following utility functions are implemented on top of the basic + stream-oriented functions. To simplify the interface, some default options + are assumed (compression level and memory usage, standard memory allocation + functions). The source code of these utility functions can be modified if + you need special options. +*/ + +ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong sourceLen)); +/* + Compresses the source buffer into the destination buffer. sourceLen is + the byte length of the source buffer. Upon entry, destLen is the total size + of the destination buffer, which must be at least the value returned by + compressBound(sourceLen). Upon exit, destLen is the actual size of the + compressed buffer. + + compress returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_BUF_ERROR if there was not enough room in the output + buffer. +*/ + +ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong sourceLen, + int level)); +/* + Compresses the source buffer into the destination buffer. The level + parameter has the same meaning as in deflateInit. sourceLen is the byte + length of the source buffer. Upon entry, destLen is the total size of the + destination buffer, which must be at least the value returned by + compressBound(sourceLen). Upon exit, destLen is the actual size of the + compressed buffer. + + compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough + memory, Z_BUF_ERROR if there was not enough room in the output buffer, + Z_STREAM_ERROR if the level parameter is invalid. +*/ + +ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen)); +/* + compressBound() returns an upper bound on the compressed size after + compress() or compress2() on sourceLen bytes. It would be used before a + compress() or compress2() call to allocate the destination buffer. +*/ + +ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen, + const Bytef *source, uLong sourceLen)); +/* + Decompresses the source buffer into the destination buffer. sourceLen is + the byte length of the source buffer. Upon entry, destLen is the total size + of the destination buffer, which must be large enough to hold the entire + uncompressed data. (The size of the uncompressed data must have been saved + previously by the compressor and transmitted to the decompressor by some + mechanism outside the scope of this compression library.) Upon exit, destLen + is the actual size of the uncompressed buffer. + + uncompress returns Z_OK if success, Z_MEM_ERROR if there was not + enough memory, Z_BUF_ERROR if there was not enough room in the output + buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete. +*/ + + + /* gzip file access functions */ + +/* + This library supports reading and writing files in gzip (.gz) format with + an interface similar to that of stdio, using the functions that start with + "gz". The gzip format is different from the zlib format. gzip is a gzip + wrapper, documented in RFC 1952, wrapped around a deflate stream. +*/ + +typedef voidp gzFile; /* opaque gzip file descriptor */ + +/* +ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode)); + + Opens a gzip (.gz) file for reading or writing. The mode parameter is as + in fopen ("rb" or "wb") but can also include a compression level ("wb9") or + a strategy: 'f' for filtered data as in "wb6f", 'h' for Huffman-only + compression as in "wb1h", 'R' for run-length encoding as in "wb1R", or 'F' + for fixed code compression as in "wb9F". (See the description of + deflateInit2 for more information about the strategy parameter.) Also "a" + can be used instead of "w" to request that the gzip stream that will be + written be appended to the file. "+" will result in an error, since reading + and writing to the same gzip file is not supported. + + gzopen can be used to read a file which is not in gzip format; in this + case gzread will directly read from the file without decompression. + + gzopen returns NULL if the file could not be opened, if there was + insufficient memory to allocate the gzFile state, or if an invalid mode was + specified (an 'r', 'w', or 'a' was not provided, or '+' was provided). + errno can be checked to determine if the reason gzopen failed was that the + file could not be opened. +*/ + +ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode)); +/* + gzdopen associates a gzFile with the file descriptor fd. File descriptors + are obtained from calls like open, dup, creat, pipe or fileno (if the file + has been previously opened with fopen). The mode parameter is as in gzopen. + + The next call of gzclose on the returned gzFile will also close the file + descriptor fd, just like fclose(fdopen(fd, mode)) closes the file descriptor + fd. If you want to keep fd open, use fd = dup(fd_keep); gz = gzdopen(fd, + mode);. The duplicated descriptor should be saved to avoid a leak, since + gzdopen does not close fd if it fails. + + gzdopen returns NULL if there was insufficient memory to allocate the + gzFile state, if an invalid mode was specified (an 'r', 'w', or 'a' was not + provided, or '+' was provided), or if fd is -1. The file descriptor is not + used until the next gz* read, write, seek, or close operation, so gzdopen + will not detect if fd is invalid (unless fd is -1). +*/ + +ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size)); +/* + Set the internal buffer size used by this library's functions. The + default buffer size is 8192 bytes. This function must be called after + gzopen() or gzdopen(), and before any other calls that read or write the + file. The buffer memory allocation is always deferred to the first read or + write. Two buffers are allocated, either both of the specified size when + writing, or one of the specified size and the other twice that size when + reading. A larger buffer size of, for example, 64K or 128K bytes will + noticeably increase the speed of decompression (reading). + + The new buffer size also affects the maximum length for gzprintf(). + + gzbuffer() returns 0 on success, or -1 on failure, such as being called + too late. +*/ + +ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy)); +/* + Dynamically update the compression level or strategy. See the description + of deflateInit2 for the meaning of these parameters. + + gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not + opened for writing. +*/ + +ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len)); +/* + Reads the given number of uncompressed bytes from the compressed file. If + the input file was not in gzip format, gzread copies the given number of + bytes into the buffer. + + After reaching the end of a gzip stream in the input, gzread will continue + to read, looking for another gzip stream, or failing that, reading the rest + of the input file directly without decompression. The entire input file + will be read if gzread is called until it returns less than the requested + len. + + gzread returns the number of uncompressed bytes actually read, less than + len for end of file, or -1 for error. +*/ + +ZEXTERN int ZEXPORT gzwrite OF((gzFile file, + voidpc buf, unsigned len)); +/* + Writes the given number of uncompressed bytes into the compressed file. + gzwrite returns the number of uncompressed bytes written or 0 in case of + error. +*/ + +ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...)); +/* + Converts, formats, and writes the arguments to the compressed file under + control of the format string, as in fprintf. gzprintf returns the number of + uncompressed bytes actually written, or 0 in case of error. The number of + uncompressed bytes written is limited to 8191, or one less than the buffer + size given to gzbuffer(). The caller should assure that this limit is not + exceeded. If it is exceeded, then gzprintf() will return an error (0) with + nothing written. In this case, there may also be a buffer overflow with + unpredictable consequences, which is possible only if zlib was compiled with + the insecure functions sprintf() or vsprintf() because the secure snprintf() + or vsnprintf() functions were not available. This can be determined using + zlibCompileFlags(). +*/ + +ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s)); +/* + Writes the given null-terminated string to the compressed file, excluding + the terminating null character. + + gzputs returns the number of characters written, or -1 in case of error. +*/ + +ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len)); +/* + Reads bytes from the compressed file until len-1 characters are read, or a + newline character is read and transferred to buf, or an end-of-file + condition is encountered. If any characters are read or if len == 1, the + string is terminated with a null character. If no characters are read due + to an end-of-file or len < 1, then the buffer is left untouched. + + gzgets returns buf which is a null-terminated string, or it returns NULL + for end-of-file or in case of error. If there was an error, the contents at + buf are indeterminate. +*/ + +ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c)); +/* + Writes c, converted to an unsigned char, into the compressed file. gzputc + returns the value that was written, or -1 in case of error. +*/ + +ZEXTERN int ZEXPORT gzgetc OF((gzFile file)); +/* + Reads one byte from the compressed file. gzgetc returns this byte or -1 + in case of end of file or error. +*/ + +ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file)); +/* + Push one character back onto the stream to be read as the first character + on the next read. At least one character of push-back is allowed. + gzungetc() returns the character pushed, or -1 on failure. gzungetc() will + fail if c is -1, and may fail if a character has been pushed but not read + yet. If gzungetc is used immediately after gzopen or gzdopen, at least the + output buffer size of pushed characters is allowed. (See gzbuffer above.) + The pushed character will be discarded if the stream is repositioned with + gzseek() or gzrewind(). +*/ + +ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush)); +/* + Flushes all pending output into the compressed file. The parameter flush + is as in the deflate() function. The return value is the zlib error number + (see function gzerror below). gzflush is only permitted when writing. + + If the flush parameter is Z_FINISH, the remaining data is written and the + gzip stream is completed in the output. If gzwrite() is called again, a new + gzip stream will be started in the output. gzread() is able to read such + concatented gzip streams. + + gzflush should be called only when strictly necessary because it will + degrade compression if called too often. +*/ + +/* +ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file, + z_off_t offset, int whence)); + + Sets the starting position for the next gzread or gzwrite on the given + compressed file. The offset represents a number of bytes in the + uncompressed data stream. The whence parameter is defined as in lseek(2); + the value SEEK_END is not supported. + + If the file is opened for reading, this function is emulated but can be + extremely slow. If the file is opened for writing, only forward seeks are + supported; gzseek then compresses a sequence of zeroes up to the new + starting position. + + gzseek returns the resulting offset location as measured in bytes from + the beginning of the uncompressed stream, or -1 in case of error, in + particular if the file is opened for writing and the new starting position + would be before the current position. +*/ + +ZEXTERN int ZEXPORT gzrewind OF((gzFile file)); +/* + Rewinds the given file. This function is supported only for reading. + + gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET) +*/ + +/* +ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file)); + + Returns the starting position for the next gzread or gzwrite on the given + compressed file. This position represents a number of bytes in the + uncompressed data stream, and is zero when starting, even if appending or + reading a gzip stream from the middle of a file using gzdopen(). + + gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR) +*/ + +/* +ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile file)); + + Returns the current offset in the file being read or written. This offset + includes the count of bytes that precede the gzip stream, for example when + appending or when using gzdopen() for reading. When reading, the offset + does not include as yet unused buffered input. This information can be used + for a progress indicator. On error, gzoffset() returns -1. +*/ + +ZEXTERN int ZEXPORT gzeof OF((gzFile file)); +/* + Returns true (1) if the end-of-file indicator has been set while reading, + false (0) otherwise. Note that the end-of-file indicator is set only if the + read tried to go past the end of the input, but came up short. Therefore, + just like feof(), gzeof() may return false even if there is no more data to + read, in the event that the last read request was for the exact number of + bytes remaining in the input file. This will happen if the input file size + is an exact multiple of the buffer size. + + If gzeof() returns true, then the read functions will return no more data, + unless the end-of-file indicator is reset by gzclearerr() and the input file + has grown since the previous end of file was detected. +*/ + +ZEXTERN int ZEXPORT gzdirect OF((gzFile file)); +/* + Returns true (1) if file is being copied directly while reading, or false + (0) if file is a gzip stream being decompressed. This state can change from + false to true while reading the input file if the end of a gzip stream is + reached, but is followed by data that is not another gzip stream. + + If the input file is empty, gzdirect() will return true, since the input + does not contain a gzip stream. + + If gzdirect() is used immediately after gzopen() or gzdopen() it will + cause buffers to be allocated to allow reading the file to determine if it + is a gzip file. Therefore if gzbuffer() is used, it should be called before + gzdirect(). +*/ + +ZEXTERN int ZEXPORT gzclose OF((gzFile file)); +/* + Flushes all pending output if necessary, closes the compressed file and + deallocates the (de)compression state. Note that once file is closed, you + cannot call gzerror with file, since its structures have been deallocated. + gzclose must not be called more than once on the same file, just as free + must not be called more than once on the same allocation. + + gzclose will return Z_STREAM_ERROR if file is not valid, Z_ERRNO on a + file operation error, or Z_OK on success. +*/ + +ZEXTERN int ZEXPORT gzclose_r OF((gzFile file)); +ZEXTERN int ZEXPORT gzclose_w OF((gzFile file)); +/* + Same as gzclose(), but gzclose_r() is only for use when reading, and + gzclose_w() is only for use when writing or appending. The advantage to + using these instead of gzclose() is that they avoid linking in zlib + compression or decompression code that is not used when only reading or only + writing respectively. If gzclose() is used, then both compression and + decompression code will be included the application when linking to a static + zlib library. +*/ + +ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum)); +/* + Returns the error message for the last error which occurred on the given + compressed file. errnum is set to zlib error number. If an error occurred + in the file system and not in the compression library, errnum is set to + Z_ERRNO and the application may consult errno to get the exact error code. + + The application must not modify the returned string. Future calls to + this function may invalidate the previously returned string. If file is + closed, then the string previously returned by gzerror will no longer be + available. + + gzerror() should be used to distinguish errors from end-of-file for those + functions above that do not distinguish those cases in their return values. +*/ + +ZEXTERN void ZEXPORT gzclearerr OF((gzFile file)); +/* + Clears the error and end-of-file flags for file. This is analogous to the + clearerr() function in stdio. This is useful for continuing to read a gzip + file that is being written concurrently. +*/ + + + /* checksum functions */ + +/* + These functions are not related to compression but are exported + anyway because they might be useful in applications using the compression + library. +*/ + +ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len)); +/* + Update a running Adler-32 checksum with the bytes buf[0..len-1] and + return the updated checksum. If buf is Z_NULL, this function returns the + required initial value for the checksum. + + An Adler-32 checksum is almost as reliable as a CRC32 but can be computed + much faster. + + Usage example: + + uLong adler = adler32(0L, Z_NULL, 0); + + while (read_buffer(buffer, length) != EOF) { + adler = adler32(adler, buffer, length); + } + if (adler != original_adler) error(); +*/ + +/* +ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2, + z_off_t len2)); + + Combine two Adler-32 checksums into one. For two sequences of bytes, seq1 + and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for + each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of + seq1 and seq2 concatenated, requiring only adler1, adler2, and len2. +*/ + +ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len)); +/* + Update a running CRC-32 with the bytes buf[0..len-1] and return the + updated CRC-32. If buf is Z_NULL, this function returns the required + initial value for the for the crc. Pre- and post-conditioning (one's + complement) is performed within this function so it shouldn't be done by the + application. + + Usage example: + + uLong crc = crc32(0L, Z_NULL, 0); + + while (read_buffer(buffer, length) != EOF) { + crc = crc32(crc, buffer, length); + } + if (crc != original_crc) error(); +*/ + +/* +ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2)); + + Combine two CRC-32 check values into one. For two sequences of bytes, + seq1 and seq2 with lengths len1 and len2, CRC-32 check values were + calculated for each, crc1 and crc2. crc32_combine() returns the CRC-32 + check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and + len2. +*/ + + + /* various hacks, don't look :) */ + +/* deflateInit and inflateInit are macros to allow checking the zlib version + * and the compiler's view of z_stream: + */ +ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level, + const char *version, int stream_size)); +ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm, + const char *version, int stream_size)); +ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method, + int windowBits, int memLevel, + int strategy, const char *version, + int stream_size)); +ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits, + const char *version, int stream_size)); +ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits, + unsigned char FAR *window, + const char *version, + int stream_size)); +#define deflateInit(strm, level) \ + deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream)) +#define inflateInit(strm) \ + inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream)) +#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \ + deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\ + (strategy), ZLIB_VERSION, sizeof(z_stream)) +#define inflateInit2(strm, windowBits) \ + inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream)) +#define inflateBackInit(strm, windowBits, window) \ + inflateBackInit_((strm), (windowBits), (window), \ + ZLIB_VERSION, sizeof(z_stream)) + +/* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or + * change the regular functions to 64 bits if _FILE_OFFSET_BITS is 64 (if + * both are true, the application gets the *64 functions, and the regular + * functions are changed to 64 bits) -- in case these are set on systems + * without large file support, _LFS64_LARGEFILE must also be true + */ +#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0 + ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); + ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); + ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); + ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off64_t)); + ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off64_t)); +#endif + +#if !defined(ZLIB_INTERNAL) && _FILE_OFFSET_BITS-0 == 64 && _LFS64_LARGEFILE-0 +# define gzopen gzopen64 +# define gzseek gzseek64 +# define gztell gztell64 +# define gzoffset gzoffset64 +# define adler32_combine adler32_combine64 +# define crc32_combine crc32_combine64 +# ifdef _LARGEFILE64_SOURCE + ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); + ZEXTERN z_off_t ZEXPORT gzseek64 OF((gzFile, z_off_t, int)); + ZEXTERN z_off_t ZEXPORT gztell64 OF((gzFile)); + ZEXTERN z_off_t ZEXPORT gzoffset64 OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t)); +# endif +#else + ZEXTERN gzFile ZEXPORT gzopen OF((const char *, const char *)); + ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile, z_off_t, int)); + ZEXTERN z_off_t ZEXPORT gztell OF((gzFile)); + ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile)); + ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t)); + ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t)); +#endif + +/* hack for buggy compilers */ +#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL) + struct internal_state {int dummy;}; +#endif + +/* undocumented functions */ +ZEXTERN const char * ZEXPORT zError OF((int)); +ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp)); +ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void)); +ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int)); + +#ifdef __cplusplus +} +#endif + +#endif /* ZLIB_H */ diff --git a/tools/shared.py b/tools/shared.py index b5903bfe..8663d606 100644 --- a/tools/shared.py +++ b/tools/shared.py @@ -37,6 +37,7 @@ if USE_EMSDK: '-I' + path_from_root('system', 'include', 'bsd'), # posix stuff '-I' + path_from_root('system', 'include', 'libc'), '-I' + path_from_root('system', 'include', 'libcxx'), + '-I' + path_from_root('system', 'include', 'gfx'), '-I' + path_from_root('system', 'include', 'net'), '-I' + path_from_root('system', 'include', 'SDL'), ] |