| Index: third_party/libpng/png.h
|
| diff --git a/third_party/libpng/png.h b/third_party/libpng/png.h
|
| index 29dc52b4dbea2a5c650ca08e4737bb0a2627ea79..cf1a27cedd6359d622632bf4955221df1e8a0e97 100644
|
| --- a/third_party/libpng/png.h
|
| +++ b/third_party/libpng/png.h
|
| @@ -1,25 +1,26 @@
|
| +
|
| /* png.h - header file for PNG reference library
|
| *
|
| - * libpng version 1.2.45 - July 7, 2011
|
| - * Copyright (c) 1998-2011 Glenn Randers-Pehrson
|
| + * libpng version 1.6.3 - July 18, 2013
|
| + * Copyright (c) 1998-2013 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 1.2.45 - July 7, 2011: Glenn
|
| - * See also "Contributing Authors", below.
|
| + * 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 1.6.3 - July 18, 2013: 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:
|
| + * 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
|
| @@ -104,190 +105,100 @@
|
| * 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
|
| + * 1.0.17rc1 10 10017 12.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
|
| + * 1.0.17 10 10017 12.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
|
| + * 1.0.18rc1-5 10 10018 12.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
|
| + * 1.0.18 10 10018 12.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]
|
| + * 1.2.10beta1-7 13 10210 12.so.0.10[.0]
|
| + * 1.2.10rc1-2 13 10210 12.so.0.10[.0]
|
| * 1.2.10 13 10210 12.so.0.10[.0]
|
| + * 1.4.0beta1-5 14 10400 14.so.0.0[.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]
|
| + * 1.4.0beta7-8 14 10400 14.so.0.0[.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]
|
| + * 1.4.0beta9-14 14 10400 14.so.0.0[.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 13 10055 10.so.0.55[.0]
|
| - * 1.2.45rc01 13 10245 12.so.0.45[.0]
|
| - * 1.0.55 13 10055 10.so.0.55[.0]
|
| - * 1.2.45 13 10245 12.so.0.45[.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/
|
| + * 1.4.0beta15-36 14 10400 14.so.0.0[.0]
|
| + * 1.4.0beta37-87 14 10400 14.so.14.0[.0]
|
| + * 1.4.0rc01 14 10400 14.so.14.0[.0]
|
| + * 1.4.0beta88-109 14 10400 14.so.14.0[.0]
|
| + * 1.4.0rc02-08 14 10400 14.so.14.0[.0]
|
| + * 1.4.0 14 10400 14.so.14.0[.0]
|
| + * 1.4.1beta01-03 14 10401 14.so.14.1[.0]
|
| + * 1.4.1rc01 14 10401 14.so.14.1[.0]
|
| + * 1.4.1beta04-12 14 10401 14.so.14.1[.0]
|
| + * 1.4.1 14 10401 14.so.14.1[.0]
|
| + * 1.4.2 14 10402 14.so.14.2[.0]
|
| + * 1.4.3 14 10403 14.so.14.3[.0]
|
| + * 1.4.4 14 10404 14.so.14.4[.0]
|
| + * 1.5.0beta01-58 15 10500 15.so.15.0[.0]
|
| + * 1.5.0rc01-07 15 10500 15.so.15.0[.0]
|
| + * 1.5.0 15 10500 15.so.15.0[.0]
|
| + * 1.5.1beta01-11 15 10501 15.so.15.1[.0]
|
| + * 1.5.1rc01-02 15 10501 15.so.15.1[.0]
|
| + * 1.5.1 15 10501 15.so.15.1[.0]
|
| + * 1.5.2beta01-03 15 10502 15.so.15.2[.0]
|
| + * 1.5.2rc01-03 15 10502 15.so.15.2[.0]
|
| + * 1.5.2 15 10502 15.so.15.2[.0]
|
| + * 1.5.3beta01-10 15 10503 15.so.15.3[.0]
|
| + * 1.5.3rc01-02 15 10503 15.so.15.3[.0]
|
| + * 1.5.3beta11 15 10503 15.so.15.3[.0]
|
| + * 1.5.3 [omitted]
|
| + * 1.5.4beta01-08 15 10504 15.so.15.4[.0]
|
| + * 1.5.4rc01 15 10504 15.so.15.4[.0]
|
| + * 1.5.4 15 10504 15.so.15.4[.0]
|
| + * 1.5.5beta01-08 15 10505 15.so.15.5[.0]
|
| + * 1.5.5rc01 15 10505 15.so.15.5[.0]
|
| + * 1.5.5 15 10505 15.so.15.5[.0]
|
| + * 1.5.6beta01-07 15 10506 15.so.15.6[.0]
|
| + * 1.5.6rc01-03 15 10506 15.so.15.6[.0]
|
| + * 1.5.6 15 10506 15.so.15.6[.0]
|
| + * 1.5.7beta01-05 15 10507 15.so.15.7[.0]
|
| + * 1.5.7rc01-03 15 10507 15.so.15.7[.0]
|
| + * 1.5.7 15 10507 15.so.15.7[.0]
|
| + * 1.6.0beta01-40 16 10600 16.so.16.0[.0]
|
| + * 1.6.0rc01-08 16 10600 16.so.16.0[.0]
|
| + * 1.6.0 16 10600 16.so.16.0[.0]
|
| + * 1.6.1beta01-09 16 10601 16.so.16.1[.0]
|
| + * 1.6.1rc01 16 10601 16.so.16.1[.0]
|
| + * 1.6.1 16 10601 16.so.16.1[.0]
|
| + * 1.6.2beta01 16 10602 16.so.16.2[.0]
|
| + * 1.6.2rc01-06 16 10602 16.so.16.2[.0]
|
| + * 1.6.2 16 10602 16.so.16.2[.0]
|
| + * 1.6.3beta01-11 16 10603 16.so.16.3[.0]
|
| + * 1.6.3rc01 16 10603 16.so.16.3[.0]
|
| + * 1.6.3 16 10603 16.so.16.3[.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-manual.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/
|
| */
|
|
|
| /*
|
| @@ -298,8 +209,8 @@
|
| *
|
| * This code is released under the libpng license.
|
| *
|
| - * libpng versions 1.2.6, August 15, 2004, through 1.2.45, July 7, 2011, are
|
| - * Copyright (c) 2004, 2006-2010 Glenn Randers-Pehrson, and are
|
| + * libpng versions 1.2.6, August 15, 2004, through 1.6.3, July 18, 2013, are
|
| + * Copyright (c) 2004, 2006-2013 Glenn Randers-Pehrson, and are
|
| * distributed according to the same disclaimer and license as libpng-1.2.5
|
| * with the following individual added to the list of Contributing Authors:
|
| *
|
| @@ -368,13 +279,13 @@
|
| * source code, or portions hereof, for any purpose, without fee, subject
|
| * to the following restrictions:
|
| *
|
| - * 1. The origin of this source code must not be misrepresented.
|
| + * 1. The origin of this source code must not be misrepresented.
|
| *
|
| - * 2. Altered versions must be plainly marked as such and
|
| - * must not be misrepresented as being the original source.
|
| + * 2. Altered versions must be plainly marked as such and must not
|
| + * be misrepresented as being the original source.
|
| *
|
| - * 3. This Copyright notice may not be removed or altered from
|
| - * any source or altered source distribution.
|
| + * 3. This Copyright notice may not be removed or altered from
|
| + * any source or altered source distribution.
|
| *
|
| * The Contributing Authors and Group 42, Inc. specifically permit, without
|
| * fee, and encourage the use of this source code as a component to
|
| @@ -387,7 +298,7 @@
|
| * A "png_get_copyright" function is available, for convenient use in "about"
|
| * boxes and the like:
|
| *
|
| - * printf("%s",png_get_copyright(NULL));
|
| + * printf("%s", png_get_copyright(NULL));
|
| *
|
| * Also, the PNG logo (in PNG format, of course) is supplied in the
|
| * files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
|
| @@ -410,29 +321,30 @@
|
| * Y2K compliance in libpng:
|
| * =========================
|
| *
|
| - * July 7, 2011
|
| + * July 18, 2013
|
| *
|
| * 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 1.2.45 are Y2K compliant. It is my belief that earlier
|
| - * versions were also Y2K compliant.
|
| + * upward through 1.6.3 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.
|
| + * Libpng only has two year fields. One is a 2-byte unsigned integer
|
| + * that will hold years up to 65535. The other, which is deprecated,
|
| + * holds 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.
|
| + * The string is
|
| + * "char time_buffer[29]" in png_struct. This is no longer used
|
| + * in libpng-1.6.x and will be removed from libpng-1.7.0.
|
| *
|
| * 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.c: png_convert_to_rfc_1123_buffer() in png.c
|
| + * (formerly png_convert_to_rfc_1123() prior to libpng-1.5.x and
|
| + * png_convert_to_rfc_1152() in error prior to libpng-0.98)
|
| * 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
|
| @@ -443,8 +355,8 @@
|
| * 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()
|
| + * the full 4-digit year. There is a possibility that libpng applications
|
| + * are not passing 4-digit years into the png_convert_to_rfc_1123_buffer()
|
| * 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
|
| @@ -465,24 +377,28 @@
|
| #ifndef PNG_H
|
| #define PNG_H
|
|
|
| -/* This is not the place to learn how to use libpng. The file libpng.txt
|
| +/* This is not the place to learn how to use libpng. The file libpng-manual.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.
|
| + *
|
| + * If you just need to read a PNG file and don't want to read the documentation
|
| + * skip to the end of this file and read the section entitled 'simplified API'.
|
| */
|
|
|
| /* Version information for png.h - this should match the version in png.c */
|
| -#define PNG_LIBPNG_VER_STRING "1.2.45"
|
| +#define PNG_LIBPNG_VER_STRING "1.6.3"
|
| #define PNG_HEADER_VERSION_STRING \
|
| - " libpng version 1.2.45 - July 7, 2011\n"
|
| + " libpng version 1.6.3 - July 18, 2013\n"
|
|
|
| -#define PNG_LIBPNG_VER_SONUM 0
|
| -#define PNG_LIBPNG_VER_DLLNUM 13
|
| +#define PNG_LIBPNG_VER_SONUM 16
|
| +#define PNG_LIBPNG_VER_DLLNUM 16
|
|
|
| /* 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 45
|
| +#define PNG_LIBPNG_VER_MINOR 6
|
| +#define PNG_LIBPNG_VER_RELEASE 3
|
| +
|
| /* This should match the numeric part of the final component of
|
| * PNG_LIBPNG_VER_STRING, omitting any leading zero:
|
| */
|
| @@ -512,19 +428,27 @@
|
| * 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 10245 /* 1.2.45 */
|
| +#define PNG_LIBPNG_VER 10603 /* 1.6.3 */
|
|
|
| -#ifndef PNG_VERSION_INFO_ONLY
|
| -/* Include the compression library's header */
|
| -#include "zlib.h"
|
| +/* Library configuration: these options cannot be changed after
|
| + * the library has been built.
|
| + */
|
| +#ifndef PNGLCONF_H
|
| + /* If pnglibconf.h is missing, you can
|
| + * copy scripts/pnglibconf.h.prebuilt to pnglibconf.h
|
| + */
|
| +# include "pnglibconf.h"
|
| #endif
|
|
|
| -/* Include all user configurable info, including optional assembler routines */
|
| -#include "pngconf.h"
|
| +#ifndef PNG_VERSION_INFO_ONLY
|
| + /* Machine specific configuration. */
|
| +# include "pngconf.h"
|
| +#endif
|
|
|
| /*
|
| - * Added at libpng-1.2.8 */
|
| -/* Ref MSDN: Private as priority over Special
|
| + * 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.
|
| @@ -535,13 +459,13 @@
|
| * StringFileInfo block must contain a SpecialBuild string.
|
| */
|
|
|
| -#ifdef PNG_USER_PRIVATEBUILD
|
| +#ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */
|
| # define PNG_LIBPNG_BUILD_TYPE \
|
| - (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE)
|
| + (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)
|
| + (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL)
|
| # else
|
| # define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE)
|
| # endif
|
| @@ -554,73 +478,103 @@
|
| 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
|
| +/* This file is arranged in several sections:
|
| + *
|
| + * 1. Any configuration options that can be specified by for the application
|
| + * code when it is built. (Build time configuration is in pnglibconf.h)
|
| + * 2. Type definitions (base types are defined in pngconf.h), structure
|
| + * definitions.
|
| + * 3. Exported library functions.
|
| + * 4. Simplified API.
|
| + *
|
| + * The library source code has additional files (principally pngpriv.h) that
|
| + * allow configuration of the library.
|
| + */
|
| +/* Section 1: run time configuration
|
| + * See pnglibconf.h for build time configuration
|
| + *
|
| + * Run time configuration allows the application to choose between
|
| + * implementations of certain arithmetic APIs. The default is set
|
| + * at build time and recorded in pnglibconf.h, but it is safe to
|
| + * override these (and only these) settings. Note that this won't
|
| + * change what the library does, only application code, and the
|
| + * settings can (and probably should) be made on a per-file basis
|
| + * by setting the #defines before including png.h
|
| + *
|
| + * Use macros to read integers from PNG data or use the exported
|
| + * functions?
|
| + * PNG_USE_READ_MACROS: use the macros (see below) Note that
|
| + * the macros evaluate their argument multiple times.
|
| + * PNG_NO_USE_READ_MACROS: call the relevant library function.
|
| + *
|
| + * Use the alternative algorithm for compositing alpha samples that
|
| + * does not use division?
|
| + * PNG_READ_COMPOSITE_NODIV_SUPPORTED: use the 'no division'
|
| + * algorithm.
|
| + * PNG_NO_READ_COMPOSITE_NODIV: use the 'division' algorithm.
|
| + *
|
| + * How to handle benign errors if PNG_ALLOW_BENIGN_ERRORS is
|
| + * false?
|
| + * PNG_ALLOW_BENIGN_ERRORS: map calls to the benign error
|
| + * APIs to png_warning.
|
| + * Otherwise the calls are mapped to png_error.
|
| + */
|
| +
|
| +/* Section 2: type definitions, including structures and compile time
|
| + * constants.
|
| + * See pngconf.h for base types that vary by machine/system
|
| + */
|
| +
|
| +/* This triggers a compiler error in png.c, if png.c and png.h
|
| + * do not agree upon the version number.
|
| + */
|
| +typedef char* png_libpng_version_1_6_3;
|
|
|
| -#endif /* PNG_NO_EXTERN */
|
| +/* Basic control structions. Read libpng-manual.txt or libpng.3 for more info.
|
| + *
|
| + * png_struct is the cache of information used while reading or writing a single
|
| + * PNG file. One of these is always required, although the simplified API
|
| + * (below) hides the creation and destruction of it.
|
| + */
|
| +typedef struct png_struct_def png_struct;
|
| +typedef const png_struct * png_const_structp;
|
| +typedef png_struct * png_structp;
|
| +typedef png_struct * * png_structpp;
|
| +
|
| +/* png_info contains information read from or to be written to a PNG file. One
|
| + * or more of these must exist while reading or creating a PNG file. The
|
| + * information is not used by libpng during read but is used to control what
|
| + * gets written when a PNG file is created. "png_get_" function calls read
|
| + * information during read and "png_set_" functions calls write information
|
| + * when creating a PNG.
|
| + * been moved into a separate header file that is not accessible to
|
| + * applications. Read libpng-manual.txt or libpng.3 for more info.
|
| + */
|
| +typedef struct png_info_def png_info;
|
| +typedef png_info * png_infop;
|
| +typedef const png_info * png_const_infop;
|
| +typedef png_info * * png_infopp;
|
| +
|
| +/* Types with names ending 'p' are pointer types. The corresponding types with
|
| + * names ending 'rp' are identical pointer types except that the pointer is
|
| + * marked 'restrict', which means that it is the only pointer to the object
|
| + * passed to the function. Applications should not use the 'restrict' types;
|
| + * it is always valid to pass 'p' to a pointer with a function argument of the
|
| + * corresponding 'rp' type. Different compilers have different rules with
|
| + * regard to type matching in the presence of 'restrict'. For backward
|
| + * compatibility libpng callbacks never have 'restrict' in their parameters and,
|
| + * consequentially, writing portable application code is extremely difficult if
|
| + * an attempt is made to use 'restrict'.
|
| + */
|
| +typedef png_struct * PNG_RESTRICT png_structrp;
|
| +typedef const png_struct * PNG_RESTRICT png_const_structrp;
|
| +typedef png_info * PNG_RESTRICT png_inforp;
|
| +typedef const png_info * PNG_RESTRICT png_const_inforp;
|
|
|
| /* 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
|
| @@ -632,8 +586,9 @@ typedef struct png_color_struct
|
| png_byte green;
|
| png_byte blue;
|
| } png_color;
|
| -typedef png_color FAR * png_colorp;
|
| -typedef png_color FAR * FAR * png_colorpp;
|
| +typedef png_color * png_colorp;
|
| +typedef const png_color * png_const_colorp;
|
| +typedef png_color * * png_colorpp;
|
|
|
| typedef struct png_color_16_struct
|
| {
|
| @@ -643,8 +598,9 @@ typedef struct png_color_16_struct
|
| 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 png_color_16 * png_color_16p;
|
| +typedef const png_color_16 * png_const_color_16p;
|
| +typedef png_color_16 * * png_color_16pp;
|
|
|
| typedef struct png_color_8_struct
|
| {
|
| @@ -654,8 +610,9 @@ typedef struct png_color_8_struct
|
| 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;
|
| +typedef png_color_8 * png_color_8p;
|
| +typedef const png_color_8 * png_const_color_8p;
|
| +typedef png_color_8 * * png_color_8pp;
|
|
|
| /*
|
| * The following two structures are used for the in-core representation
|
| @@ -669,8 +626,9 @@ typedef struct png_sPLT_entry_struct
|
| 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;
|
| +typedef png_sPLT_entry * png_sPLT_entryp;
|
| +typedef const png_sPLT_entry * png_const_sPLT_entryp;
|
| +typedef png_sPLT_entry * * 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
|
| @@ -684,17 +642,27 @@ typedef struct png_sPLT_struct
|
| 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;
|
| +typedef png_sPLT_t * png_sPLT_tp;
|
| +typedef const png_sPLT_t * png_const_sPLT_tp;
|
| +typedef png_sPLT_t * * 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.
|
| + * points to a regular zero-terminated C string. The "text" fields can be a
|
| + * regular C string, an empty string, or a NULL pointer.
|
| + * However, the structure returned by png_get_text() will always contain
|
| + * the "text" field as a regular zero-terminated C string (possibly
|
| + * empty), never a NULL pointer, so it can be safely used in printf() and
|
| + * other string-handling functions. Note that the "itxt_length", "lang", and
|
| + * "lang_key" members of the structure only exist when the library is built
|
| + * with iTXt chunk support. Prior to libpng-1.4.0 the library was built by
|
| + * default without iTXt support. Also note that when iTXt *is* supported,
|
| + * the "lang" and "lang_key" fields contain NULL pointers when the
|
| + * "compression" field contains * PNG_TEXT_COMPRESSION_NONE or
|
| + * PNG_TEXT_COMPRESSION_zTXt. Note that the "compression value" is not the
|
| + * same as what appears in the PNG tEXt/zTXt/iTXt chunk's "compression flag"
|
| + * which is always 0 or 1, or its "compression method" which is always 0.
|
| */
|
| typedef struct png_text_struct
|
| {
|
| @@ -707,21 +675,19 @@ typedef struct png_text_struct
|
| 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;
|
| +typedef png_text * png_textp;
|
| +typedef const png_text * png_const_textp;
|
| +typedef png_text * * 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.
|
| - */
|
| + * 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
|
| @@ -745,320 +711,56 @@ typedef struct png_time_struct
|
| 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;
|
| +typedef png_time * png_timep;
|
| +typedef const png_time * png_const_timep;
|
| +typedef png_time * * png_timepp;
|
|
|
| -#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \
|
| - defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
|
| +#ifdef PNG_STORE_UNKNOWN_CHUNKS_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.
|
| + *
|
| + * The data in the structure is set by libpng on read and used on write.
|
| */
|
| -#define PNG_CHUNK_NAME_LENGTH 5
|
| typedef struct png_unknown_chunk_t
|
| {
|
| - png_byte name[PNG_CHUNK_NAME_LENGTH];
|
| - png_byte *data;
|
| + png_byte name[5]; /* Textual chunk name with '\0' terminator */
|
| + png_byte *data; /* Data, should not be modified on read! */
|
| png_size_t size;
|
|
|
| - /* libpng-using applications should NOT directly modify this byte. */
|
| + /* On write 'location' must be set using the flag values listed below.
|
| + * Notice that on read it is set by libpng however the values stored have
|
| + * more bits set than are listed below. Always treat the value as a
|
| + * bitmask. On write set only one bit - setting multiple bits may cause the
|
| + * chunk to be written in multiple places.
|
| + */
|
| 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) */
|
| +typedef png_unknown_chunk * png_unknown_chunkp;
|
| +typedef const png_unknown_chunk * png_const_unknown_chunkp;
|
| +typedef png_unknown_chunk * * png_unknown_chunkpp;
|
| #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;
|
| +/* Flag values for the unknown chunk location byte. */
|
| +#define PNG_HAVE_IHDR 0x01
|
| +#define PNG_HAVE_PLTE 0x02
|
| +#define PNG_AFTER_IDAT 0x08
|
|
|
| /* 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 are constants for fixed point values encoded in the
|
| + * PNG specification manner (x100000)
|
| + */
|
| +#define PNG_FP_1 100000
|
| +#define PNG_FP_HALF 50000
|
| +#define PNG_FP_MAX ((png_fixed_point)0x7fffffffL)
|
| +#define PNG_FP_MIN (-PNG_FP_MAX)
|
|
|
| /* These describe the color_type field in png_info. */
|
| /* color type masks */
|
| @@ -1146,7 +848,7 @@ typedef png_info FAR * FAR * png_infopp;
|
| #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 */
|
| +#define PNG_INFO_IDAT 0x8000 /* 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
|
| @@ -1154,53 +856,79 @@ typedef png_info FAR * FAR * png_infopp;
|
| */
|
| 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_uint_32 width; /* width of row */
|
| + png_size_t 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;
|
| +typedef png_row_info * png_row_infop;
|
| +typedef png_row_info * * 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));
|
| + * user read/write data functions. Note that the 'write' function must not
|
| + * modify the buffer it is passed. The 'read' function, on the other hand, is
|
| + * expected to return the read data in the buffer.
|
| + */
|
| +typedef PNG_CALLBACK(void, *png_error_ptr, (png_structp, png_const_charp));
|
| +typedef PNG_CALLBACK(void, *png_rw_ptr, (png_structp, png_bytep, png_size_t));
|
| +typedef PNG_CALLBACK(void, *png_flush_ptr, (png_structp));
|
| +typedef PNG_CALLBACK(void, *png_read_status_ptr, (png_structp, png_uint_32,
|
| + int));
|
| +typedef PNG_CALLBACK(void, *png_write_status_ptr, (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));
|
| +typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop));
|
| +typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop));
|
| +
|
| +/* The following callback receives png_uint_32 row_number, int pass for the
|
| + * png_bytep data of the row. When transforming an interlaced image the
|
| + * row number is the row number within the sub-image of the interlace pass, so
|
| + * the value will increase to the height of the sub-image (not the full image)
|
| + * then reset to 0 for the next pass.
|
| + *
|
| + * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to
|
| + * find the output pixel (x,y) given an interlaced sub-image pixel
|
| + * (row,col,pass). (See below for these macros.)
|
| + */
|
| +typedef PNG_CALLBACK(void, *png_progressive_row_ptr, (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));
|
| + defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
|
| +typedef PNG_CALLBACK(void, *png_user_transform_ptr, (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));
|
| +typedef PNG_CALLBACK(int, *png_user_chunk_ptr, (png_structp,
|
| + png_unknown_chunkp));
|
| #endif
|
| #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
|
| -typedef void (PNGAPI *png_unknown_chunk_ptr) PNGARG((png_structp));
|
| +/* not used anywhere */
|
| +/* typedef PNG_CALLBACK(void, *png_unknown_chunk_ptr, (png_structp)); */
|
| +#endif
|
| +
|
| +#ifdef PNG_SETJMP_SUPPORTED
|
| +/* This must match the function definition in <setjmp.h>, and the application
|
| + * must include this before png.h to obtain the definition of jmp_buf. The
|
| + * function is required to be PNG_NORETURN, but this is not checked. If the
|
| + * function does return the application will crash via an abort() or similar
|
| + * system level call.
|
| + *
|
| + * If you get a warning here while building the library you may need to make
|
| + * changes to ensure that pnglibconf.h records the calling convention used by
|
| + * your compiler. This may be very difficult - try using a different compiler
|
| + * to build the library!
|
| + */
|
| +PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)), typedef);
|
| #endif
|
|
|
| /* Transform masks for the high-level interface */
|
| @@ -1216,690 +944,663 @@ typedef void (PNGAPI *png_unknown_chunk_ptr) PNGARG((png_structp));
|
| #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 */
|
| +#define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* write only */
|
| /* 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_STRIP_FILLER_BEFORE PNG_TRANSFORM_STRIP_FILLER
|
| +#define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */
|
| +/* Added to libpng-1.4.0 */
|
| #define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */
|
| +/* Added to libpng-1.5.4 */
|
| +#define PNG_TRANSFORM_EXPAND_16 0x4000 /* read only */
|
| +#define PNG_TRANSFORM_SCALE_16 0x8000 /* 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.
|
| +/* NOTE: prior to 1.5 these functions had no 'API' style declaration,
|
| + * this allowed the zlib default functions to be used on Windows
|
| + * platforms. In 1.5 the zlib default malloc (which just calls malloc and
|
| + * ignores the first argument) should be completely compatible with the
|
| + * following.
|
| */
|
| -typedef png_structp version_1_2_45;
|
| -
|
| -typedef png_struct FAR * FAR * png_structpp;
|
| +typedef PNG_CALLBACK(png_voidp, *png_malloc_ptr, (png_structp,
|
| + png_alloc_size_t));
|
| +typedef PNG_CALLBACK(void, *png_free_ptr, (png_structp, png_voidp));
|
|
|
| -/* 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
|
| +/* Section 3: exported functions
|
| + * Here are the function definitions most commonly used. This is not
|
| + * the place to find out how to use libpng. See libpng-manual.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.
|
| + *
|
| + * The PNG_EXPORT() and PNG_EXPORTA() macros used below are defined in
|
| + * pngconf.h and in the *.dfn files in the scripts directory.
|
| + *
|
| + * PNG_EXPORT(ordinal, type, name, (args));
|
| + *
|
| + * ordinal: ordinal that is used while building
|
| + * *.def files. The ordinal value is only
|
| + * relevant when preprocessing png.h with
|
| + * the *.dfn files for building symbol table
|
| + * entries, and are removed by pngconf.h.
|
| + * type: return type of the function
|
| + * name: function name
|
| + * args: function arguments, with types
|
| + *
|
| + * When we wish to append attributes to a function prototype we use
|
| + * the PNG_EXPORTA() macro instead.
|
| + *
|
| + * PNG_EXPORTA(ordinal, type, name, (args), attributes);
|
| + *
|
| + * ordinal, type, name, and args: same as in PNG_EXPORT().
|
| + * attributes: function attributes
|
| */
|
|
|
| /* Returns the version number of the library */
|
| -extern PNG_EXPORT(png_uint_32,png_access_version_number) PNGARG((void));
|
| +PNG_EXPORT(1, png_uint_32, png_access_version_number, (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));
|
| +PNG_EXPORT(2, void, png_set_sig_bytes, (png_structrp 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));
|
| +PNG_EXPORT(3, int, png_sig_cmp, (png_const_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;
|
| +#define png_check_sig(sig, n) !png_sig_cmp((sig), 0, (n))
|
|
|
| /* 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;
|
| +PNG_EXPORTA(4, png_structp, png_create_read_struct,
|
| + (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;
|
| +PNG_EXPORTA(5, png_structp, png_create_write_struct,
|
| + (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
|
| +PNG_EXPORT(6, png_size_t, png_get_compression_buffer_size,
|
| + (png_const_structrp png_ptr));
|
|
|
| -#ifdef PNG_WRITE_SUPPORTED
|
| -extern PNG_EXPORT(void,png_set_compression_buffer_size)
|
| - PNGARG((png_structp png_ptr, png_uint_32 size));
|
| +PNG_EXPORT(7, void, png_set_compression_buffer_size, (png_structrp png_ptr,
|
| + png_size_t size));
|
| +
|
| +/* Moved from pngconf.h in 1.4.0 and modified to ensure setjmp/longjmp
|
| + * match up.
|
| + */
|
| +#ifdef PNG_SETJMP_SUPPORTED
|
| +/* This function returns the jmp_buf built in to *png_ptr. It must be
|
| + * supplied with an appropriate 'longjmp' function to use on that jmp_buf
|
| + * unless the default error function is overridden in which case NULL is
|
| + * acceptable. The size of the jmp_buf is checked against the actual size
|
| + * allocated by the library - the call will return NULL on a mismatch
|
| + * indicating an ABI mismatch.
|
| + */
|
| +PNG_EXPORT(8, jmp_buf*, png_set_longjmp_fn, (png_structrp png_ptr,
|
| + png_longjmp_ptr longjmp_fn, size_t jmp_buf_size));
|
| +# define png_jmpbuf(png_ptr) \
|
| + (*png_set_longjmp_fn((png_ptr), longjmp, (sizeof (jmp_buf))))
|
| +#else
|
| +# define png_jmpbuf(png_ptr) \
|
| + (LIBPNG_WAS_COMPILED_WITH__PNG_NO_SETJMP)
|
| #endif
|
| +/* This function should be used by libpng applications in place of
|
| + * longjmp(png_ptr->jmpbuf, val). If longjmp_fn() has been set, it
|
| + * will use it; otherwise it will call PNG_ABORT(). This function was
|
| + * added in libpng-1.5.0.
|
| + */
|
| +PNG_EXPORTA(9, void, png_longjmp, (png_const_structrp png_ptr, int val),
|
| + PNG_NORETURN);
|
|
|
| +#ifdef PNG_READ_SUPPORTED
|
| /* Reset the compression stream */
|
| -extern PNG_EXPORT(int,png_reset_zstream) PNGARG((png_structp png_ptr));
|
| +PNG_EXPORTA(10, int, png_reset_zstream, (png_structrp png_ptr), PNG_DEPRECATED);
|
| +#endif
|
|
|
| /* 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;
|
| +PNG_EXPORTA(11, png_structp, png_create_read_struct_2,
|
| + (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);
|
| +PNG_EXPORTA(12, png_structp, png_create_write_struct_2,
|
| + (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 the PNG file signature. */
|
| +PNG_EXPORT(13, void, png_write_sig, (png_structrp png_ptr));
|
| +
|
| /* 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));
|
| +PNG_EXPORT(14, void, png_write_chunk, (png_structrp png_ptr, png_const_bytep
|
| + chunk_name, png_const_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));
|
| +PNG_EXPORT(15, void, png_write_chunk_start, (png_structrp png_ptr,
|
| + png_const_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));
|
| +PNG_EXPORT(16, void, png_write_chunk_data, (png_structrp png_ptr,
|
| + png_const_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));
|
| +PNG_EXPORT(17, void, png_write_chunk_end, (png_structrp 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
|
| +PNG_EXPORTA(18, png_infop, png_create_info_struct, (png_const_structrp png_ptr),
|
| + PNG_ALLOCATED);
|
|
|
| -extern PNG_EXPORT(void,png_info_init_3) PNGARG((png_infopp info_ptr,
|
| - png_size_t png_info_struct_size));
|
| +/* DEPRECATED: this function allowed init structures to be created using the
|
| + * default allocation method (typically malloc). Use is deprecated in 1.6.0 and
|
| + * the API will be removed in the future.
|
| + */
|
| +PNG_EXPORTA(19, void, png_info_init_3, (png_infopp info_ptr,
|
| + png_size_t png_info_struct_size), PNG_DEPRECATED);
|
|
|
| /* 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));
|
| +PNG_EXPORT(20, void, png_write_info_before_PLTE,
|
| + (png_structrp png_ptr, png_const_inforp info_ptr));
|
| +PNG_EXPORT(21, void, png_write_info,
|
| + (png_structrp png_ptr, png_const_inforp 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));
|
| +PNG_EXPORT(22, void, png_read_info,
|
| + (png_structrp png_ptr, png_inforp 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));
|
| + /* Convert to a US string format: there is no localization support in this
|
| + * routine. The original implementation used a 29 character buffer in
|
| + * png_struct, this will be removed in future versions.
|
| + */
|
| +#if PNG_LIBPNG_VER < 10700
|
| +/* To do: remove this from libpng17 (and from libpng17/png.c and pngstruct.h) */
|
| +PNG_EXPORTA(23, png_const_charp, png_convert_to_rfc1123, (png_structrp png_ptr,
|
| + png_const_timep ptime),PNG_DEPRECATED);
|
| +#endif
|
| +PNG_EXPORT(241, int, png_convert_to_rfc1123_buffer, (char out[29],
|
| + png_const_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));
|
| +PNG_EXPORT(24, void, png_convert_from_struct_tm, (png_timep ptime,
|
| + const struct tm * 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));
|
| +PNG_EXPORT(25, void, png_convert_from_time_t, (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;
|
| +PNG_EXPORT(26, void, png_set_expand, (png_structrp png_ptr));
|
| +PNG_EXPORT(27, void, png_set_expand_gray_1_2_4_to_8, (png_structrp png_ptr));
|
| +PNG_EXPORT(28, void, png_set_palette_to_rgb, (png_structrp png_ptr));
|
| +PNG_EXPORT(29, void, png_set_tRNS_to_alpha, (png_structrp png_ptr));
|
| #endif
|
| +
|
| +#ifdef PNG_READ_EXPAND_16_SUPPORTED
|
| +/* Expand to 16-bit channels, forces conversion of palette to RGB and expansion
|
| + * of a tRNS chunk if present.
|
| + */
|
| +PNG_EXPORT(221, void, png_set_expand_16, (png_structrp png_ptr));
|
| #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));
|
| +PNG_EXPORT(30, void, png_set_bgr, (png_structrp 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));
|
| +PNG_EXPORT(31, void, png_set_gray_to_rgb, (png_structrp 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));
|
| +#define PNG_ERROR_ACTION_NONE 1
|
| +#define PNG_ERROR_ACTION_WARN 2
|
| +#define PNG_ERROR_ACTION_ERROR 3
|
| +#define PNG_RGB_TO_GRAY_DEFAULT (-1)/*for red/green coefficients*/
|
|
|
| -#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
|
| -extern PNG_EXPORT(void,png_set_strip_alpha) PNGARG((png_structp png_ptr));
|
| -#endif
|
| +PNG_FP_EXPORT(32, void, png_set_rgb_to_gray, (png_structrp png_ptr,
|
| + int error_action, double red, double green))
|
| +PNG_FIXED_EXPORT(33, void, png_set_rgb_to_gray_fixed, (png_structrp png_ptr,
|
| + int error_action, png_fixed_point red, png_fixed_point green))
|
|
|
| -#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));
|
| +PNG_EXPORT(34, png_byte, png_get_rgb_to_gray_status, (png_const_structrp
|
| + 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));
|
| +#ifdef PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED
|
| +PNG_EXPORT(35, void, png_build_grayscale_palette, (int bit_depth,
|
| + png_colorp palette));
|
| #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 */
|
| +#ifdef PNG_READ_ALPHA_MODE_SUPPORTED
|
| +/* How the alpha channel is interpreted - this affects how the color channels of
|
| + * a PNG file are returned when an alpha channel, or tRNS chunk in a palette
|
| + * file, is present.
|
| + *
|
| + * This has no effect on the way pixels are written into a PNG output
|
| + * datastream. The color samples in a PNG datastream are never premultiplied
|
| + * with the alpha samples.
|
| + *
|
| + * The default is to return data according to the PNG specification: the alpha
|
| + * channel is a linear measure of the contribution of the pixel to the
|
| + * corresponding composited pixel. The gamma encoded color channels must be
|
| + * scaled according to the contribution and to do this it is necessary to undo
|
| + * the encoding, scale the color values, perform the composition and reencode
|
| + * the values. This is the 'PNG' mode.
|
| + *
|
| + * The alternative is to 'associate' the alpha with the color information by
|
| + * storing color channel values that have been scaled by the alpha. The
|
| + * advantage is that the color channels can be resampled (the image can be
|
| + * scaled) in this form. The disadvantage is that normal practice is to store
|
| + * linear, not (gamma) encoded, values and this requires 16-bit channels for
|
| + * still images rather than the 8-bit channels that are just about sufficient if
|
| + * gamma encoding is used. In addition all non-transparent pixel values,
|
| + * including completely opaque ones, must be gamma encoded to produce the final
|
| + * image. This is the 'STANDARD', 'ASSOCIATED' or 'PREMULTIPLIED' mode (the
|
| + * latter being the two common names for associated alpha color channels.)
|
| + *
|
| + * Since it is not necessary to perform arithmetic on opaque color values so
|
| + * long as they are not to be resampled and are in the final color space it is
|
| + * possible to optimize the handling of alpha by storing the opaque pixels in
|
| + * the PNG format (adjusted for the output color space) while storing partially
|
| + * opaque pixels in the standard, linear, format. The accuracy required for
|
| + * standard alpha composition is relatively low, because the pixels are
|
| + * isolated, therefore typically the accuracy loss in storing 8-bit linear
|
| + * values is acceptable. (This is not true if the alpha channel is used to
|
| + * simulate transparency over large areas - use 16 bits or the PNG mode in
|
| + * this case!) This is the 'OPTIMIZED' mode. For this mode a pixel is
|
| + * treated as opaque only if the alpha value is equal to the maximum value.
|
| + *
|
| + * The final choice is to gamma encode the alpha channel as well. This is
|
| + * broken because, in practice, no implementation that uses this choice
|
| + * correctly undoes the encoding before handling alpha composition. Use this
|
| + * choice only if other serious errors in the software or hardware you use
|
| + * mandate it; the typical serious error is for dark halos to appear around
|
| + * opaque areas of the composited PNG image because of arithmetic overflow.
|
| + *
|
| + * The API function png_set_alpha_mode specifies which of these choices to use
|
| + * with an enumerated 'mode' value and the gamma of the required output:
|
| + */
|
| +#define PNG_ALPHA_PNG 0 /* according to the PNG standard */
|
| +#define PNG_ALPHA_STANDARD 1 /* according to Porter/Duff */
|
| +#define PNG_ALPHA_ASSOCIATED 1 /* as above; this is the normal practice */
|
| +#define PNG_ALPHA_PREMULTIPLIED 1 /* as above */
|
| +#define PNG_ALPHA_OPTIMIZED 2 /* 'PNG' for opaque pixels, else 'STANDARD' */
|
| +#define PNG_ALPHA_BROKEN 3 /* the alpha channel is gamma encoded */
|
| +
|
| +PNG_FP_EXPORT(227, void, png_set_alpha_mode, (png_structrp png_ptr, int mode,
|
| + double output_gamma))
|
| +PNG_FIXED_EXPORT(228, void, png_set_alpha_mode_fixed, (png_structrp png_ptr,
|
| + int mode, png_fixed_point output_gamma))
|
| +#endif
|
| +
|
| +#if defined(PNG_GAMMA_SUPPORTED) || defined(PNG_READ_ALPHA_MODE_SUPPORTED)
|
| +/* The output_gamma value is a screen gamma in libpng terminology: it expresses
|
| + * how to decode the output values, not how they are encoded. The values used
|
| + * correspond to the normal numbers used to describe the overall gamma of a
|
| + * computer display system; for example 2.2 for an sRGB conformant system. The
|
| + * values are scaled by 100000 in the _fixed version of the API (so 220000 for
|
| + * sRGB.)
|
| + *
|
| + * The inverse of the value is always used to provide a default for the PNG file
|
| + * encoding if it has no gAMA chunk and if png_set_gamma() has not been called
|
| + * to override the PNG gamma information.
|
| + *
|
| + * When the ALPHA_OPTIMIZED mode is selected the output gamma is used to encode
|
| + * opaque pixels however pixels with lower alpha values are not encoded,
|
| + * regardless of the output gamma setting.
|
| + *
|
| + * When the standard Porter Duff handling is requested with mode 1 the output
|
| + * encoding is set to be linear and the output_gamma value is only relevant
|
| + * as a default for input data that has no gamma information. The linear output
|
| + * encoding will be overridden if png_set_gamma() is called - the results may be
|
| + * highly unexpected!
|
| + *
|
| + * The following numbers are derived from the sRGB standard and the research
|
| + * behind it. sRGB is defined to be approximated by a PNG gAMA chunk value of
|
| + * 0.45455 (1/2.2) for PNG. The value implicitly includes any viewing
|
| + * correction required to take account of any differences in the color
|
| + * environment of the original scene and the intended display environment; the
|
| + * value expresses how to *decode* the image for display, not how the original
|
| + * data was *encoded*.
|
| + *
|
| + * sRGB provides a peg for the PNG standard by defining a viewing environment.
|
| + * sRGB itself, and earlier TV standards, actually use a more complex transform
|
| + * (a linear portion then a gamma 2.4 power law) than PNG can express. (PNG is
|
| + * limited to simple power laws.) By saying that an image for direct display on
|
| + * an sRGB conformant system should be stored with a gAMA chunk value of 45455
|
| + * (11.3.3.2 and 11.3.3.5 of the ISO PNG specification) the PNG specification
|
| + * makes it possible to derive values for other display systems and
|
| + * environments.
|
| + *
|
| + * The Mac value is deduced from the sRGB based on an assumption that the actual
|
| + * extra viewing correction used in early Mac display systems was implemented as
|
| + * a power 1.45 lookup table.
|
| + *
|
| + * Any system where a programmable lookup table is used or where the behavior of
|
| + * the final display device characteristics can be changed requires system
|
| + * specific code to obtain the current characteristic. However this can be
|
| + * difficult and most PNG gamma correction only requires an approximate value.
|
| + *
|
| + * By default, if png_set_alpha_mode() is not called, libpng assumes that all
|
| + * values are unencoded, linear, values and that the output device also has a
|
| + * linear characteristic. This is only very rarely correct - it is invariably
|
| + * better to call png_set_alpha_mode() with PNG_DEFAULT_sRGB than rely on the
|
| + * default if you don't know what the right answer is!
|
| + *
|
| + * The special value PNG_GAMMA_MAC_18 indicates an older Mac system (pre Mac OS
|
| + * 10.6) which used a correction table to implement a somewhat lower gamma on an
|
| + * otherwise sRGB system.
|
| + *
|
| + * Both these values are reserved (not simple gamma values) in order to allow
|
| + * more precise correction internally in the future.
|
| + *
|
| + * NOTE: the following values can be passed to either the fixed or floating
|
| + * point APIs, but the floating point API will also accept floating point
|
| + * values.
|
| + */
|
| +#define PNG_DEFAULT_sRGB -1 /* sRGB gamma and color space */
|
| +#define PNG_GAMMA_MAC_18 -2 /* Old Mac '1.8' gamma and color space */
|
| +#define PNG_GAMMA_sRGB 220000 /* Television standards--matches sRGB gamma */
|
| +#define PNG_GAMMA_LINEAR PNG_FP_1 /* Linear */
|
| +#endif
|
| +
|
| +/* The following are examples of calls to png_set_alpha_mode to achieve the
|
| + * required overall gamma correction and, where necessary, alpha
|
| + * premultiplication.
|
| + *
|
| + * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB);
|
| + * This is the default libpng handling of the alpha channel - it is not
|
| + * pre-multiplied into the color components. In addition the call states
|
| + * that the output is for a sRGB system and causes all PNG files without gAMA
|
| + * chunks to be assumed to be encoded using sRGB.
|
| + *
|
| + * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC);
|
| + * In this case the output is assumed to be something like an sRGB conformant
|
| + * display preceeded by a power-law lookup table of power 1.45. This is how
|
| + * early Mac systems behaved.
|
| + *
|
| + * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_GAMMA_LINEAR);
|
| + * This is the classic Jim Blinn approach and will work in academic
|
| + * environments where everything is done by the book. It has the shortcoming
|
| + * of assuming that input PNG data with no gamma information is linear - this
|
| + * is unlikely to be correct unless the PNG files where generated locally.
|
| + * Most of the time the output precision will be so low as to show
|
| + * significant banding in dark areas of the image.
|
| + *
|
| + * png_set_expand_16(pp);
|
| + * png_set_alpha_mode(pp, PNG_ALPHA_STANDARD, PNG_DEFAULT_sRGB);
|
| + * This is a somewhat more realistic Jim Blinn inspired approach. PNG files
|
| + * are assumed to have the sRGB encoding if not marked with a gamma value and
|
| + * the output is always 16 bits per component. This permits accurate scaling
|
| + * and processing of the data. If you know that your input PNG files were
|
| + * generated locally you might need to replace PNG_DEFAULT_sRGB with the
|
| + * correct value for your system.
|
| + *
|
| + * png_set_alpha_mode(pp, PNG_ALPHA_OPTIMIZED, PNG_DEFAULT_sRGB);
|
| + * If you just need to composite the PNG image onto an existing background
|
| + * and if you control the code that does this you can use the optimization
|
| + * setting. In this case you just copy completely opaque pixels to the
|
| + * output. For pixels that are not completely transparent (you just skip
|
| + * those) you do the composition math using png_composite or png_composite_16
|
| + * below then encode the resultant 8-bit or 16-bit values to match the output
|
| + * encoding.
|
| + *
|
| + * Other cases
|
| + * If neither the PNG nor the standard linear encoding work for you because
|
| + * of the software or hardware you use then you have a big problem. The PNG
|
| + * case will probably result in halos around the image. The linear encoding
|
| + * will probably result in a washed out, too bright, image (it's actually too
|
| + * contrasty.) Try the ALPHA_OPTIMIZED mode above - this will probably
|
| + * substantially reduce the halos. Alternatively try:
|
| + *
|
| + * png_set_alpha_mode(pp, PNG_ALPHA_BROKEN, PNG_DEFAULT_sRGB);
|
| + * This option will also reduce the halos, but there will be slight dark
|
| + * halos round the opaque parts of the image where the background is light.
|
| + * In the OPTIMIZED mode the halos will be light halos where the background
|
| + * is dark. Take your pick - the halos are unavoidable unless you can get
|
| + * your hardware/software fixed! (The OPTIMIZED approach is slightly
|
| + * faster.)
|
| + *
|
| + * When the default gamma of PNG files doesn't match the output gamma.
|
| + * If you have PNG files with no gamma information png_set_alpha_mode allows
|
| + * you to provide a default gamma, but it also sets the ouput gamma to the
|
| + * matching value. If you know your PNG files have a gamma that doesn't
|
| + * match the output you can take advantage of the fact that
|
| + * png_set_alpha_mode always sets the output gamma but only sets the PNG
|
| + * default if it is not already set:
|
| + *
|
| + * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_DEFAULT_sRGB);
|
| + * png_set_alpha_mode(pp, PNG_ALPHA_PNG, PNG_GAMMA_MAC);
|
| + * The first call sets both the default and the output gamma values, the
|
| + * second call overrides the output gamma without changing the default. This
|
| + * is easier than achieving the same effect with png_set_gamma. You must use
|
| + * PNG_ALPHA_PNG for the first call - internal checking in png_set_alpha will
|
| + * fire if more than one call to png_set_alpha_mode and png_set_background is
|
| + * made in the same read operation, however multiple calls with PNG_ALPHA_PNG
|
| + * are ignored.
|
| + */
|
| +
|
| +#ifdef PNG_READ_STRIP_ALPHA_SUPPORTED
|
| +PNG_EXPORT(36, void, png_set_strip_alpha, (png_structrp png_ptr));
|
| +#endif
|
| +
|
| +#if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \
|
| + defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
|
| +PNG_EXPORT(37, void, png_set_swap_alpha, (png_structrp png_ptr));
|
| +#endif
|
| +
|
| +#if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \
|
| + defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
|
| +PNG_EXPORT(38, void, png_set_invert_alpha, (png_structrp 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. */
|
| +PNG_EXPORT(39, void, png_set_filler, (png_structrp 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. */
|
| +PNG_EXPORT(40, void, png_set_add_alpha, (png_structrp png_ptr,
|
| + png_uint_32 filler, int flags));
|
| +#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));
|
| +PNG_EXPORT(41, void, png_set_swap, (png_structrp 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));
|
| +PNG_EXPORT(42, void, png_set_packing, (png_structrp png_ptr));
|
| #endif
|
|
|
| -#if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED)
|
| +#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));
|
| +PNG_EXPORT(43, void, png_set_packswap, (png_structrp 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));
|
| +PNG_EXPORT(44, void, png_set_shift, (png_structrp png_ptr, png_const_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));
|
| +/* Have the code handle the interlacing. Returns the number of passes.
|
| + * MUST be called before png_read_update_info or png_start_read_image,
|
| + * otherwise it will not have the desired effect. Note that it is still
|
| + * necessary to call png_read_row or png_read_rows png_get_image_height
|
| + * times for each pass.
|
| +*/
|
| +PNG_EXPORT(45, int, png_set_interlace_handling, (png_structrp 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));
|
| +PNG_EXPORT(46, void, png_set_invert_mono, (png_structrp 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));
|
| +/* Handle alpha and tRNS by replacing with a background color. Prior to
|
| + * libpng-1.5.4 this API must not be called before the PNG file header has been
|
| + * read. Doing so will result in unexpected behavior and possible warnings or
|
| + * errors if the PNG file contains a bKGD chunk.
|
| + */
|
| +PNG_FP_EXPORT(47, void, png_set_background, (png_structrp png_ptr,
|
| + png_const_color_16p background_color, int background_gamma_code,
|
| + int need_expand, double background_gamma))
|
| +PNG_FIXED_EXPORT(215, void, png_set_background_fixed, (png_structrp png_ptr,
|
| + png_const_color_16p background_color, int background_gamma_code,
|
| + int need_expand, png_fixed_point background_gamma))
|
| +#endif
|
| +#ifdef PNG_READ_BACKGROUND_SUPPORTED
|
| +# 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
|
| -#define PNG_BACKGROUND_GAMMA_UNKNOWN 0
|
| -#define PNG_BACKGROUND_GAMMA_SCREEN 1
|
| -#define PNG_BACKGROUND_GAMMA_FILE 2
|
| -#define PNG_BACKGROUND_GAMMA_UNIQUE 3
|
| +
|
| +#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED
|
| +/* Scale a 16-bit depth file down to 8-bit, accurately. */
|
| +PNG_EXPORT(229, void, png_set_scale_16, (png_structrp png_ptr));
|
| #endif
|
|
|
| -#ifdef PNG_READ_16_TO_8_SUPPORTED
|
| +#ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED
|
| +#define PNG_READ_16_TO_8 SUPPORTED /* Name prior to 1.5.4 */
|
| /* 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));
|
| +PNG_EXPORT(48, void, png_set_strip_16, (png_structrp 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));
|
| +#ifdef PNG_READ_QUANTIZE_SUPPORTED
|
| +/* Turn on quantizing, and reduce the palette to the number of colors
|
| + * available.
|
| + */
|
| +PNG_EXPORT(49, void, png_set_quantize, (png_structrp png_ptr,
|
| + png_colorp palette, int num_palette, int maximum_colors,
|
| + png_const_uint_16p histogram, int full_quantize));
|
| #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
|
| +/* The threshold on gamma processing is configurable but hard-wired into the
|
| + * library. The following is the floating point variant.
|
| + */
|
| +#define PNG_GAMMA_THRESHOLD (PNG_GAMMA_THRESHOLD_FIXED*.00001)
|
|
|
| -#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
|
| +/* Handle gamma correction. Screen_gamma=(display_exponent).
|
| + * NOTE: this API simply sets the screen and file gamma values. It will
|
| + * therefore override the value for gamma in a PNG file if it is called after
|
| + * the file header has been read - use with care - call before reading the PNG
|
| + * file for best results!
|
| + *
|
| + * These routines accept the same gamma values as png_set_alpha_mode (described
|
| + * above). The PNG_GAMMA_ defines and PNG_DEFAULT_sRGB can be passed to either
|
| + * API (floating point or fixed.) Notice, however, that the 'file_gamma' value
|
| + * is the inverse of a 'screen gamma' value.
|
| + */
|
| +PNG_FP_EXPORT(50, void, png_set_gamma, (png_structrp png_ptr,
|
| + double screen_gamma, double override_file_gamma))
|
| +PNG_FIXED_EXPORT(208, void, png_set_gamma_fixed, (png_structrp png_ptr,
|
| + png_fixed_point screen_gamma, png_fixed_point override_file_gamma))
|
| #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));
|
| +PNG_EXPORT(51, void, png_set_flush, (png_structrp png_ptr, int nrows));
|
| /* Flush the current PNG output buffer */
|
| -extern PNG_EXPORT(void,png_write_flush) PNGARG((png_structp png_ptr));
|
| +PNG_EXPORT(52, void, png_write_flush, (png_structrp png_ptr));
|
| #endif
|
|
|
| /* Optional update palette with requested transformations */
|
| -extern PNG_EXPORT(void,png_start_read_image) PNGARG((png_structp png_ptr));
|
| +PNG_EXPORT(53, void, png_start_read_image, (png_structrp 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));
|
| +PNG_EXPORT(54, void, png_read_update_info, (png_structrp png_ptr,
|
| + png_inforp info_ptr));
|
|
|
| -#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
|
| +#ifdef PNG_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));
|
| +PNG_EXPORT(55, void, png_read_rows, (png_structrp png_ptr, png_bytepp row,
|
| + png_bytepp display_row, png_uint_32 num_rows));
|
| #endif
|
|
|
| -#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
|
| +#ifdef PNG_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));
|
| +PNG_EXPORT(56, void, png_read_row, (png_structrp png_ptr, png_bytep row,
|
| + png_bytep display_row));
|
| #endif
|
|
|
| -#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
|
| +#ifdef PNG_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));
|
| +PNG_EXPORT(57, void, png_read_image, (png_structrp 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));
|
| +PNG_EXPORT(58, void, png_write_row, (png_structrp png_ptr,
|
| + png_const_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 a few rows of image data: (*row) is not written; however, the type
|
| + * is declared as writeable to maintain compatibility with previous versions
|
| + * of libpng and to allow the 'display_row' array from read_rows to be passed
|
| + * unchanged to write_rows.
|
| + */
|
| +PNG_EXPORT(59, void, png_write_rows, (png_structrp 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));
|
| +PNG_EXPORT(60, void, png_write_image, (png_structrp 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));
|
| +/* Write the end of the PNG file. */
|
| +PNG_EXPORT(61, void, png_write_end, (png_structrp png_ptr,
|
| + png_inforp info_ptr));
|
|
|
| -#ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
|
| +#ifdef PNG_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));
|
| +PNG_EXPORT(62, void, png_read_end, (png_structrp png_ptr, png_inforp 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));
|
| +PNG_EXPORT(63, void, png_destroy_info_struct, (png_const_structrp 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) */
|
| -extern void png_read_destroy PNGARG((png_structp png_ptr, png_infop info_ptr,
|
| - png_infop end_info_ptr)) PNG_DEPRECATED;
|
| +PNG_EXPORT(64, void, png_destroy_read_struct, (png_structpp png_ptr_ptr,
|
| + png_infopp info_ptr_ptr, png_infopp end_info_ptr_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) */
|
| -extern void png_write_destroy PNGARG((png_structp png_ptr)) PNG_DEPRECATED;
|
| +PNG_EXPORT(65, void, png_destroy_write_struct, (png_structpp png_ptr_ptr,
|
| + png_infopp info_ptr_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));
|
| +PNG_EXPORT(66, void, png_set_crc_action, (png_structrp png_ptr, int crit_action,
|
| + int ancil_action));
|
|
|
| -/* Values for png_set_crc_action() to say how to handle CRC errors in
|
| +/* Values for png_set_crc_action() 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,
|
| @@ -1926,8 +1627,8 @@ extern PNG_EXPORT(void,png_set_crc_action) PNGARG((png_structp png_ptr,
|
| /* 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));
|
| +PNG_EXPORT(67, void, png_set_filter, (png_structrp 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
|
| @@ -1953,7 +1654,7 @@ extern PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method,
|
| #define PNG_FILTER_VALUE_PAETH 4
|
| #define PNG_FILTER_VALUE_LAST 5
|
|
|
| -#if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) /* EXPERIMENTAL */
|
| +#ifdef 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).
|
| @@ -1982,11 +1683,13 @@ extern PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method,
|
| * 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
|
| +PNG_FP_EXPORT(68, void, png_set_filter_heuristics, (png_structrp png_ptr,
|
| + int heuristic_method, int num_weights, png_const_doublep filter_weights,
|
| + png_const_doublep filter_costs))
|
| +PNG_FIXED_EXPORT(209, void, png_set_filter_heuristics_fixed,
|
| + (png_structrp png_ptr, int heuristic_method, int num_weights,
|
| + png_const_fixed_point_p filter_weights,
|
| + png_const_fixed_point_p filter_costs))
|
| #endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */
|
|
|
| /* Heuristic used for row filter selection. These defines should NOT be
|
| @@ -1997,6 +1700,7 @@ extern PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr,
|
| #define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */
|
| #define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */
|
|
|
| +#ifdef PNG_WRITE_SUPPORTED
|
| /* 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
|
| @@ -2004,33 +1708,58 @@ extern PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr,
|
| * 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));
|
| +PNG_EXPORT(69, void, png_set_compression_level, (png_structrp png_ptr,
|
| + int level));
|
| +
|
| +PNG_EXPORT(70, void, png_set_compression_mem_level, (png_structrp png_ptr,
|
| + int mem_level));
|
| +
|
| +PNG_EXPORT(71, void, png_set_compression_strategy, (png_structrp png_ptr,
|
| + int strategy));
|
|
|
| -extern PNG_EXPORT(void,png_set_compression_mem_level)
|
| - PNGARG((png_structp png_ptr, int mem_level));
|
| +/* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a
|
| + * smaller value of window_bits if it can do so safely.
|
| + */
|
| +PNG_EXPORT(72, void, png_set_compression_window_bits, (png_structrp png_ptr,
|
| + int window_bits));
|
| +
|
| +PNG_EXPORT(73, void, png_set_compression_method, (png_structrp png_ptr,
|
| + int method));
|
| +#endif
|
|
|
| -extern PNG_EXPORT(void,png_set_compression_strategy)
|
| - PNGARG((png_structp png_ptr, int strategy));
|
| +#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
|
| +/* Also set zlib parameters for compressing non-IDAT chunks */
|
| +PNG_EXPORT(222, void, png_set_text_compression_level, (png_structrp png_ptr,
|
| + int level));
|
|
|
| -extern PNG_EXPORT(void,png_set_compression_window_bits)
|
| - PNGARG((png_structp png_ptr, int window_bits));
|
| +PNG_EXPORT(223, void, png_set_text_compression_mem_level, (png_structrp png_ptr,
|
| + int mem_level));
|
|
|
| -extern PNG_EXPORT(void,png_set_compression_method) PNGARG((png_structp png_ptr,
|
| - int method));
|
| +PNG_EXPORT(224, void, png_set_text_compression_strategy, (png_structrp png_ptr,
|
| + int strategy));
|
| +
|
| +/* If PNG_WRITE_OPTIMIZE_CMF_SUPPORTED is defined, libpng will use a
|
| + * smaller value of window_bits if it can do so safely.
|
| + */
|
| +PNG_EXPORT(225, void, png_set_text_compression_window_bits,
|
| + (png_structrp png_ptr, int window_bits));
|
| +
|
| +PNG_EXPORT(226, void, png_set_text_compression_method, (png_structrp png_ptr,
|
| + int method));
|
| +#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */
|
|
|
| /* 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
|
| + * different manner by calling png_set_???_fn(). See libpng-manual.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));
|
| +PNG_EXPORT(74, void, png_init_io, (png_structrp png_ptr, png_FILE_p fp));
|
| #endif
|
|
|
| /* Replace the (error and abort), and warning functions with user
|
| @@ -2041,11 +1770,11 @@ extern PNG_EXPORT(void,png_init_io) PNGARG((png_structp png_ptr, png_FILE_p fp))
|
| * 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));
|
| +PNG_EXPORT(75, void, png_set_error_fn, (png_structrp 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));
|
| +PNG_EXPORT(76, png_voidp, png_get_error_ptr, (png_const_structrp 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.
|
| @@ -2057,117 +1786,164 @@ extern PNG_EXPORT(png_voidp,png_get_error_ptr) PNGARG((png_structp png_ptr));
|
| * 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));
|
| +PNG_EXPORT(77, void, png_set_write_fn, (png_structrp 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));
|
| +PNG_EXPORT(78, void, png_set_read_fn, (png_structrp 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));
|
| +PNG_EXPORT(79, png_voidp, png_get_io_ptr, (png_const_structrp png_ptr));
|
|
|
| -extern PNG_EXPORT(void,png_set_read_status_fn) PNGARG((png_structp png_ptr,
|
| - png_read_status_ptr read_row_fn));
|
| +PNG_EXPORT(80, void, png_set_read_status_fn, (png_structrp 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));
|
| +PNG_EXPORT(81, void, png_set_write_status_fn, (png_structrp 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));
|
| +PNG_EXPORT(82, void, png_set_mem_fn, (png_structrp 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));
|
| +PNG_EXPORT(83, png_voidp, png_get_mem_ptr, (png_const_structrp 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));
|
| +#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
|
| +PNG_EXPORT(84, void, png_set_read_user_transform_fn, (png_structrp 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));
|
| +#ifdef PNG_WRITE_USER_TRANSFORM_SUPPORTED
|
| +PNG_EXPORT(85, void, png_set_write_user_transform_fn, (png_structrp 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));
|
| +#ifdef PNG_USER_TRANSFORM_PTR_SUPPORTED
|
| +PNG_EXPORT(86, void, png_set_user_transform_info, (png_structrp 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));
|
| +PNG_EXPORT(87, png_voidp, png_get_user_transform_ptr,
|
| + (png_const_structrp png_ptr));
|
| +#endif
|
| +
|
| +#ifdef PNG_USER_TRANSFORM_INFO_SUPPORTED
|
| +/* Return information about the row currently being processed. Note that these
|
| + * APIs do not fail but will return unexpected results if called outside a user
|
| + * transform callback. Also note that when transforming an interlaced image the
|
| + * row number is the row number within the sub-image of the interlace pass, so
|
| + * the value will increase to the height of the sub-image (not the full image)
|
| + * then reset to 0 for the next pass.
|
| + *
|
| + * Use PNG_ROW_FROM_PASS_ROW(row, pass) and PNG_COL_FROM_PASS_COL(col, pass) to
|
| + * find the output pixel (x,y) given an interlaced sub-image pixel
|
| + * (row,col,pass). (See below for these macros.)
|
| + */
|
| +PNG_EXPORT(217, png_uint_32, png_get_current_row_number, (png_const_structrp));
|
| +PNG_EXPORT(218, png_byte, png_get_current_pass_number, (png_const_structrp));
|
| +#endif
|
| +
|
| +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED
|
| +/* This callback is called only for *unknown* chunks. If
|
| + * PNG_HANDLE_AS_UNKNOWN_SUPPORTED is set then it is possible to set known
|
| + * chunks to be treated as unknown, however in this case the callback must do
|
| + * any processing required by the chunk (e.g. by calling the appropriate
|
| + * png_set_ APIs.)
|
| + *
|
| + * There is no write support - on write, by default, all the chunks in the
|
| + * 'unknown' list are written in the specified position.
|
| + *
|
| + * The integer return from the callback function is interpreted thus:
|
| + *
|
| + * negative: An error occured, png_chunk_error will be called.
|
| + * zero: The chunk was not handled, the chunk will be saved. A critical
|
| + * chunk will cause an error at this point unless it is to be saved.
|
| + * positive: The chunk was handled, libpng will ignore/discard it.
|
| + *
|
| + * See "INTERACTION WTIH USER CHUNK CALLBACKS" below for important notes about
|
| + * how this behavior will change in libpng 1.7
|
| + */
|
| +PNG_EXPORT(88, void, png_set_read_user_chunk_fn, (png_structrp png_ptr,
|
| + png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn));
|
| #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));
|
| +PNG_EXPORT(89, png_voidp, png_get_user_chunk_ptr, (png_const_structrp 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));
|
| +PNG_EXPORT(90, void, png_set_progressive_read_fn, (png_structrp 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));
|
| +PNG_EXPORT(91, png_voidp, png_get_progressive_ptr,
|
| + (png_const_structrp 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));
|
| +PNG_EXPORT(92, void, png_process_data, (png_structrp png_ptr,
|
| + png_inforp 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?????
|
| +/* A function which may be called *only* within png_process_data to stop the
|
| + * processing of any more data. The function returns the number of bytes
|
| + * remaining, excluding any that libpng has cached internally. A subsequent
|
| + * call to png_process_data must supply these bytes again. If the argument
|
| + * 'save' is set to true the routine will first save all the pending data and
|
| + * will always return 0.
|
| */
|
| -extern PNG_EXPORT(void,png_progressive_combine_row) PNGARG((png_structp png_ptr,
|
| - png_bytep old_row, png_bytep new_row));
|
| +PNG_EXPORT(219, png_size_t, png_process_data_pause, (png_structrp, int save));
|
| +
|
| +/* A function which may be called *only* outside (after) a call to
|
| + * png_process_data. It returns the number of bytes of data to skip in the
|
| + * input. Normally it will return 0, but if it returns a non-zero value the
|
| + * application must skip than number of bytes of input data and pass the
|
| + * following data to the next call to png_process_data.
|
| + */
|
| +PNG_EXPORT(220, png_uint_32, png_process_data_skip, (png_structrp));
|
| +
|
| +#ifdef PNG_READ_INTERLACING_SUPPORTED
|
| +/* Function that combines rows. 'new_row' is a flag that should come from
|
| + * the callback and be non-NULL if anything needs to be done; the library
|
| + * stores its own version of the new data internally and ignores the passed
|
| + * in value.
|
| + */
|
| +PNG_EXPORT(93, void, png_progressive_combine_row, (png_const_structrp png_ptr,
|
| + png_bytep old_row, png_const_bytep new_row));
|
| +#endif /* PNG_READ_INTERLACING_SUPPORTED */
|
| #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
|
|
|
| -extern PNG_EXPORT(png_voidp,png_malloc) PNGARG((png_structp png_ptr,
|
| - png_uint_32 size)) PNG_ALLOCATED;
|
| +PNG_EXPORTA(94, png_voidp, png_malloc, (png_const_structrp png_ptr,
|
| + png_alloc_size_t size), PNG_ALLOCATED);
|
| +/* Added at libpng version 1.4.0 */
|
| +PNG_EXPORTA(95, png_voidp, png_calloc, (png_const_structrp png_ptr,
|
| + png_alloc_size_t 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
|
| +PNG_EXPORTA(96, png_voidp, png_malloc_warn, (png_const_structrp png_ptr,
|
| + png_alloc_size_t size), PNG_ALLOCATED);
|
|
|
| /* 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
|
| +PNG_EXPORT(97, void, png_free, (png_const_structrp png_ptr, png_voidp ptr));
|
|
|
| /* 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
|
| +PNG_EXPORT(98, void, png_free_data, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, png_uint_32 free_me, int num));
|
| +
|
| /* Reassign responsibility for freeing existing data, whether allocated
|
| - * by libpng or by the application
|
| + * by libpng or by the application; this works on the png_info structure passed
|
| + * in, it does not change the state for other png_info structures.
|
| + *
|
| + * It is unlikely that this function works correctly as of 1.6.0 and using it
|
| + * may result either in memory leaks or double free of allocated data.
|
| */
|
| -extern PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr,
|
| - png_infop info_ptr, int freer, png_uint_32 mask));
|
| -#endif
|
| +PNG_EXPORTA(99, void, png_data_freer, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, int freer, png_uint_32 mask), PNG_DEPRECATED);
|
| +
|
| /* Assignments for png_data_freer */
|
| #define PNG_DESTROY_WILL_FREE_DATA 1
|
| #define PNG_SET_WILL_FREE_DATA 1
|
| @@ -2179,8 +1955,10 @@ extern PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr,
|
| #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
|
| +#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
|
| +# define PNG_FREE_UNKN 0x0200
|
| +#endif
|
| +/* PNG_FREE_LIST 0x0400 removed in 1.6.0 because it is ignored */
|
| #define PNG_FREE_PLTE 0x1000
|
| #define PNG_FREE_TRNS 0x2000
|
| #define PNG_FREE_TEXT 0x4000
|
| @@ -2188,47 +1966,59 @@ extern PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr,
|
| #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));
|
| +PNG_EXPORTA(100, png_voidp, png_malloc_default, (png_const_structrp png_ptr,
|
| + png_alloc_size_t size), PNG_ALLOCATED PNG_DEPRECATED);
|
| +PNG_EXPORTA(101, void, png_free_default, (png_const_structrp png_ptr,
|
| + png_voidp ptr), PNG_DEPRECATED);
|
| #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
|
| +#ifdef PNG_ERROR_TEXT_SUPPORTED
|
| /* 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;
|
| +PNG_EXPORTA(102, void, png_error, (png_const_structrp 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;
|
| +PNG_EXPORTA(103, void, png_chunk_error, (png_const_structrp 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;
|
| +PNG_EXPORTA(104, void, png_err, (png_const_structrp png_ptr), PNG_NORETURN);
|
| #endif
|
|
|
| -#ifndef PNG_NO_WARNINGS
|
| +#ifdef PNG_WARNINGS_SUPPORTED
|
| /* 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));
|
| +PNG_EXPORT(105, void, png_warning, (png_const_structrp 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 */
|
| +PNG_EXPORT(106, void, png_chunk_warning, (png_const_structrp png_ptr,
|
| + png_const_charp warning_message));
|
| +#endif
|
| +
|
| +#ifdef PNG_BENIGN_ERRORS_SUPPORTED
|
| +/* Benign error in libpng. Can continue, but may have a problem.
|
| + * User can choose whether to handle as a fatal error or as a warning. */
|
| +PNG_EXPORT(107, void, png_benign_error, (png_const_structrp png_ptr,
|
| + png_const_charp warning_message));
|
| +
|
| +#ifdef PNG_READ_SUPPORTED
|
| +/* Same, chunk name is prepended to message (only during read) */
|
| +PNG_EXPORT(108, void, png_chunk_benign_error, (png_const_structrp png_ptr,
|
| + png_const_charp warning_message));
|
| +#endif
|
| +
|
| +PNG_EXPORT(109, void, png_set_benign_errors,
|
| + (png_structrp png_ptr, int allowed));
|
| +#else
|
| +# ifdef PNG_ALLOW_BENIGN_ERRORS
|
| +# define png_benign_error png_warning
|
| +# define png_chunk_benign_error png_chunk_warning
|
| +# else
|
| +# define png_benign_error png_error
|
| +# define png_chunk_benign_error png_chunk_error
|
| +# endif
|
| +#endif
|
|
|
| /* 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
|
| @@ -2243,480 +2033,495 @@ extern PNG_EXPORT(void,png_chunk_warning) PNGARG((png_structp png_ptr,
|
| * 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));
|
| +PNG_EXPORT(110, png_uint_32, png_get_valid, (png_const_structrp png_ptr,
|
| + png_const_inforp 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));
|
| +PNG_EXPORT(111, png_size_t, png_get_rowbytes, (png_const_structrp png_ptr,
|
| + png_const_inforp 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));
|
| +PNG_EXPORT(112, png_bytepp, png_get_rows, (png_const_structrp png_ptr,
|
| + png_const_inforp 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));
|
| +PNG_EXPORT(113, void, png_set_rows, (png_const_structrp png_ptr,
|
| + png_inforp 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));
|
| +PNG_EXPORT(114, png_byte, png_get_channels, (png_const_structrp png_ptr,
|
| + png_const_inforp 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));
|
| +PNG_EXPORT(115, png_uint_32, png_get_image_width, (png_const_structrp png_ptr,
|
| + png_const_inforp 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));
|
| +PNG_EXPORT(116, png_uint_32, png_get_image_height, (png_const_structrp png_ptr,
|
| + png_const_inforp info_ptr));
|
|
|
| /* Returns image bit_depth. */
|
| -extern PNG_EXPORT(png_byte, png_get_bit_depth) PNGARG((png_structp
|
| -png_ptr, png_infop info_ptr));
|
| +PNG_EXPORT(117, png_byte, png_get_bit_depth, (png_const_structrp png_ptr,
|
| + png_const_inforp info_ptr));
|
|
|
| /* Returns image color_type. */
|
| -extern PNG_EXPORT(png_byte, png_get_color_type) PNGARG((png_structp
|
| -png_ptr, png_infop info_ptr));
|
| +PNG_EXPORT(118, png_byte, png_get_color_type, (png_const_structrp png_ptr,
|
| + png_const_inforp info_ptr));
|
|
|
| /* Returns image filter_type. */
|
| -extern PNG_EXPORT(png_byte, png_get_filter_type) PNGARG((png_structp
|
| -png_ptr, png_infop info_ptr));
|
| +PNG_EXPORT(119, png_byte, png_get_filter_type, (png_const_structrp png_ptr,
|
| + png_const_inforp info_ptr));
|
|
|
| /* Returns image interlace_type. */
|
| -extern PNG_EXPORT(png_byte, png_get_interlace_type) PNGARG((png_structp
|
| -png_ptr, png_infop info_ptr));
|
| +PNG_EXPORT(120, png_byte, png_get_interlace_type, (png_const_structrp png_ptr,
|
| + png_const_inforp info_ptr));
|
|
|
| /* Returns image compression_type. */
|
| -extern PNG_EXPORT(png_byte, png_get_compression_type) PNGARG((png_structp
|
| -png_ptr, png_infop info_ptr));
|
| +PNG_EXPORT(121, png_byte, png_get_compression_type, (png_const_structrp png_ptr,
|
| + png_const_inforp 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));
|
| +PNG_EXPORT(122, png_uint_32, png_get_pixels_per_meter,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr));
|
| +PNG_EXPORT(123, png_uint_32, png_get_x_pixels_per_meter,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr));
|
| +PNG_EXPORT(124, png_uint_32, png_get_y_pixels_per_meter,
|
| + (png_const_structrp png_ptr, png_const_inforp 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
|
| +PNG_FP_EXPORT(125, float, png_get_pixel_aspect_ratio,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr))
|
| +PNG_FIXED_EXPORT(210, png_fixed_point, png_get_pixel_aspect_ratio_fixed,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr))
|
|
|
| /* 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));
|
| +PNG_EXPORT(126, png_int_32, png_get_x_offset_pixels,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr));
|
| +PNG_EXPORT(127, png_int_32, png_get_y_offset_pixels,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr));
|
| +PNG_EXPORT(128, png_int_32, png_get_x_offset_microns,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr));
|
| +PNG_EXPORT(129, png_int_32, png_get_y_offset_microns,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr));
|
|
|
| #endif /* PNG_EASY_ACCESS_SUPPORTED */
|
|
|
| +#ifdef PNG_READ_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));
|
| +PNG_EXPORT(130, png_const_bytep, png_get_signature, (png_const_structrp png_ptr,
|
| + png_const_inforp info_ptr));
|
| +#endif
|
|
|
| #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));
|
| +PNG_EXPORT(131, png_uint_32, png_get_bKGD, (png_const_structrp png_ptr,
|
| + png_inforp 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));
|
| +PNG_EXPORT(132, void, png_set_bKGD, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, png_const_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
|
| +PNG_FP_EXPORT(133, png_uint_32, png_get_cHRM, (png_const_structrp png_ptr,
|
| + png_const_inforp 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))
|
| +PNG_FP_EXPORT(230, png_uint_32, png_get_cHRM_XYZ, (png_const_structrp png_ptr,
|
| + png_const_inforp info_ptr, double *red_X, double *red_Y, double *red_Z,
|
| + double *green_X, double *green_Y, double *green_Z, double *blue_X,
|
| + double *blue_Y, double *blue_Z))
|
| +PNG_FIXED_EXPORT(134, png_uint_32, png_get_cHRM_fixed,
|
| + (png_const_structrp png_ptr, png_const_inforp 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))
|
| +PNG_FIXED_EXPORT(231, png_uint_32, png_get_cHRM_XYZ_fixed,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr,
|
| + png_fixed_point *int_red_X, png_fixed_point *int_red_Y,
|
| + png_fixed_point *int_red_Z, png_fixed_point *int_green_X,
|
| + png_fixed_point *int_green_Y, png_fixed_point *int_green_Z,
|
| + png_fixed_point *int_blue_X, png_fixed_point *int_blue_Y,
|
| + png_fixed_point *int_blue_Z))
|
| #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
|
| +PNG_FP_EXPORT(135, void, png_set_cHRM, (png_const_structrp png_ptr,
|
| + png_inforp 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))
|
| +PNG_FP_EXPORT(232, void, png_set_cHRM_XYZ, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, double red_X, double red_Y, double red_Z,
|
| + double green_X, double green_Y, double green_Z, double blue_X,
|
| + double blue_Y, double blue_Z))
|
| +PNG_FIXED_EXPORT(136, void, png_set_cHRM_fixed, (png_const_structrp png_ptr,
|
| + png_inforp 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))
|
| +PNG_FIXED_EXPORT(233, void, png_set_cHRM_XYZ_fixed, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, png_fixed_point int_red_X, png_fixed_point int_red_Y,
|
| + png_fixed_point int_red_Z, png_fixed_point int_green_X,
|
| + png_fixed_point int_green_Y, png_fixed_point int_green_Z,
|
| + png_fixed_point int_blue_X, png_fixed_point int_blue_Y,
|
| + png_fixed_point int_blue_Z))
|
| #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));
|
| +PNG_FP_EXPORT(137, png_uint_32, png_get_gAMA, (png_const_structrp png_ptr,
|
| + png_const_inforp info_ptr, double *file_gamma))
|
| +PNG_FIXED_EXPORT(138, png_uint_32, png_get_gAMA_fixed,
|
| + (png_const_structrp png_ptr, png_const_inforp 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));
|
| +PNG_FP_EXPORT(139, void, png_set_gAMA, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, double file_gamma))
|
| +PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_const_structrp png_ptr,
|
| + png_inforp 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));
|
| +PNG_EXPORT(141, png_uint_32, png_get_hIST, (png_const_structrp png_ptr,
|
| + png_inforp 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));
|
| +PNG_EXPORT(142, void, png_set_hIST, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, png_const_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));
|
| +PNG_EXPORT(143, png_uint_32, png_get_IHDR, (png_const_structrp png_ptr,
|
| + png_const_inforp 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));
|
| +PNG_EXPORT(144, void, png_set_IHDR, (png_const_structrp png_ptr,
|
| + png_inforp 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,
|
| +PNG_EXPORT(145, png_uint_32, png_get_oFFs, (png_const_structrp png_ptr,
|
| + png_const_inforp 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));
|
| +PNG_EXPORT(146, void, png_set_oFFs, (png_const_structrp png_ptr,
|
| + png_inforp 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));
|
| +PNG_EXPORT(147, png_uint_32, png_get_pCAL, (png_const_structrp png_ptr,
|
| + png_inforp 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));
|
| +PNG_EXPORT(148, void, png_set_pCAL, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, png_const_charp purpose, png_int_32 X0, png_int_32 X1,
|
| + int type, int nparams, png_const_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));
|
| +PNG_EXPORT(149, png_uint_32, png_get_pHYs, (png_const_structrp png_ptr,
|
| + png_const_inforp 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));
|
| +PNG_EXPORT(150, void, png_set_pHYs, (png_const_structrp png_ptr,
|
| + png_inforp 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));
|
| +PNG_EXPORT(151, png_uint_32, png_get_PLTE, (png_const_structrp png_ptr,
|
| + png_inforp 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));
|
| +PNG_EXPORT(152, void, png_set_PLTE, (png_structrp png_ptr,
|
| + png_inforp info_ptr, png_const_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));
|
| +PNG_EXPORT(153, png_uint_32, png_get_sBIT, (png_const_structrp png_ptr,
|
| + png_inforp 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));
|
| +PNG_EXPORT(154, void, png_set_sBIT, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, png_const_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));
|
| +PNG_EXPORT(155, png_uint_32, png_get_sRGB, (png_const_structrp png_ptr,
|
| + png_const_inforp info_ptr, int *file_srgb_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));
|
| +PNG_EXPORT(156, void, png_set_sRGB, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, int srgb_intent));
|
| +PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, int srgb_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 */
|
| +PNG_EXPORT(158, png_uint_32, png_get_iCCP, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, png_charpp name, int *compression_type,
|
| + png_bytepp profile, png_uint_32 *proflen));
|
| #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 */
|
| +PNG_EXPORT(159, void, png_set_iCCP, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, png_const_charp name, int compression_type,
|
| + png_const_bytep profile, png_uint_32 proflen));
|
| #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));
|
| +PNG_EXPORT(160, int, png_get_sPLT, (png_const_structrp png_ptr,
|
| + png_inforp 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));
|
| +PNG_EXPORT(161, void, png_set_sPLT, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, png_const_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));
|
| +PNG_EXPORT(162, int, png_get_text, (png_const_structrp png_ptr,
|
| + png_inforp 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.
|
| +/* 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));
|
| +PNG_EXPORT(163, void, png_set_text, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, png_const_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));
|
| +PNG_EXPORT(164, png_uint_32, png_get_tIME, (png_const_structrp png_ptr,
|
| + png_inforp 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));
|
| +PNG_EXPORT(165, void, png_set_tIME, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, png_const_timep mod_time));
|
| #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));
|
| +PNG_EXPORT(166, png_uint_32, png_get_tRNS, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, png_bytep *trans_alpha, int *num_trans,
|
| + png_color_16p *trans_color));
|
| #endif
|
|
|
| #ifdef PNG_tRNS_SUPPORTED
|
| +PNG_EXPORT(167, void, png_set_tRNS, (png_structrp png_ptr,
|
| + png_inforp info_ptr, png_const_bytep trans_alpha, int num_trans,
|
| + png_const_color_16p trans_color));
|
| #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
|
| +PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, (png_const_structrp png_ptr,
|
| + png_const_inforp info_ptr, int *unit, double *width, double *height))
|
| +#if defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) || \
|
| + defined(PNG_FLOATING_POINT_SUPPORTED)
|
| +/* NOTE: this API is currently implemented using floating point arithmetic,
|
| + * consequently it can only be used on systems with floating point support.
|
| + * In any case the range of values supported by png_fixed_point is small and it
|
| + * is highly recommended that png_get_sCAL_s be used instead.
|
| + */
|
| +PNG_FIXED_EXPORT(214, png_uint_32, png_get_sCAL_fixed,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit,
|
| + png_fixed_point *width, png_fixed_point *height))
|
| +#endif
|
| +PNG_EXPORT(169, png_uint_32, png_get_sCAL_s,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr, int *unit,
|
| + png_charpp swidth, png_charpp sheight));
|
| +
|
| +PNG_FP_EXPORT(170, void, png_set_sCAL, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, int unit, double width, double height))
|
| +PNG_FIXED_EXPORT(213, void, png_set_sCAL_fixed, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, int unit, png_fixed_point width,
|
| + png_fixed_point height))
|
| +PNG_EXPORT(171, void, png_set_sCAL_s, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, int unit,
|
| + png_const_charp swidth, png_const_charp sheight));
|
| #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));
|
| +#ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
|
| +/* Provide the default handling for all unknown chunks or, optionally, for
|
| + * specific unknown chunks.
|
| + *
|
| + * NOTE: prior to 1.6.0 the handling specified for particular chunks on read was
|
| + * ignored and the default was used, the per-chunk setting only had an effect on
|
| + * write. If you wish to have chunk-specific handling on read in code that must
|
| + * work on earlier versions you must use a user chunk callback to specify the
|
| + * desired handling (keep or discard.)
|
| + *
|
| + * The 'keep' parameter is a PNG_HANDLE_CHUNK_ value as listed below. The
|
| + * parameter is interpreted as follows:
|
| + *
|
| + * READ:
|
| + * PNG_HANDLE_CHUNK_AS_DEFAULT:
|
| + * Known chunks: do normal libpng processing, do not keep the chunk (but
|
| + * see the comments below about PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
|
| + * Unknown chunks: for a specific chunk use the global default, when used
|
| + * as the default discard the chunk data.
|
| + * PNG_HANDLE_CHUNK_NEVER:
|
| + * Discard the chunk data.
|
| + * PNG_HANDLE_CHUNK_IF_SAFE:
|
| + * Keep the chunk data if the chunk is not critical else raise a chunk
|
| + * error.
|
| + * PNG_HANDLE_CHUNK_ALWAYS:
|
| + * Keep the chunk data.
|
| + *
|
| + * If the chunk data is saved it can be retrieved using png_get_unknown_chunks,
|
| + * below. Notice that specifying "AS_DEFAULT" as a global default is equivalent
|
| + * to specifying "NEVER", however when "AS_DEFAULT" is used for specific chunks
|
| + * it simply resets the behavior to the libpng default.
|
| + *
|
| + * INTERACTION WTIH USER CHUNK CALLBACKS:
|
| + * The per-chunk handling is always used when there is a png_user_chunk_ptr
|
| + * callback and the callback returns 0; the chunk is then always stored *unless*
|
| + * it is critical and the per-chunk setting is other than ALWAYS. Notice that
|
| + * the global default is *not* used in this case. (In effect the per-chunk
|
| + * value is incremented to at least IF_SAFE.)
|
| + *
|
| + * IMPORTANT NOTE: this behavior will change in libpng 1.7 - the global and
|
| + * per-chunk defaults will be honored. If you want to preserve the current
|
| + * behavior when your callback returns 0 you must set PNG_HANDLE_CHUNK_IF_SAFE
|
| + * as the default - if you don't do this libpng 1.6 will issue a warning.
|
| + *
|
| + * If you want unhandled unknown chunks to be discarded in libpng 1.6 and
|
| + * earlier simply return '1' (handled).
|
| + *
|
| + * PNG_HANDLE_AS_UNKNOWN_SUPPORTED:
|
| + * If this is *not* set known chunks will always be handled by libpng and
|
| + * will never be stored in the unknown chunk list. Known chunks listed to
|
| + * png_set_keep_unknown_chunks will have no effect. If it is set then known
|
| + * chunks listed with a keep other than AS_DEFAULT will *never* be processed
|
| + * by libpng, in addition critical chunks must either be processed by the
|
| + * callback or saved.
|
| + *
|
| + * The IHDR and IEND chunks must not be listed. Because this turns off the
|
| + * default handling for chunks that would otherwise be recognized the
|
| + * behavior of libpng transformations may well become incorrect!
|
| + *
|
| + * WRITE:
|
| + * When writing chunks the options only apply to the chunks specified by
|
| + * png_set_unknown_chunks (below), libpng will *always* write known chunks
|
| + * required by png_set_ calls and will always write the core critical chunks
|
| + * (as required for PLTE).
|
| + *
|
| + * Each chunk in the png_set_unknown_chunks list is looked up in the
|
| + * png_set_keep_unknown_chunks list to find the keep setting, this is then
|
| + * interpreted as follows:
|
| + *
|
| + * PNG_HANDLE_CHUNK_AS_DEFAULT:
|
| + * Write safe-to-copy chunks and write other chunks if the global
|
| + * default is set to _ALWAYS, otherwise don't write this chunk.
|
| + * PNG_HANDLE_CHUNK_NEVER:
|
| + * Do not write the chunk.
|
| + * PNG_HANDLE_CHUNK_IF_SAFE:
|
| + * Write the chunk if it is safe-to-copy, otherwise do not write it.
|
| + * PNG_HANDLE_CHUNK_ALWAYS:
|
| + * Write the chunk.
|
| + *
|
| + * Note that the default behavior is effectively the opposite of the read case -
|
| + * in read unknown chunks are not stored by default, in write they are written
|
| + * by default. Also the behavior of PNG_HANDLE_CHUNK_IF_SAFE is very different
|
| + * - on write the safe-to-copy bit is checked, on read the critical bit is
|
| + * checked and on read if the chunk is critical an error will be raised.
|
| + *
|
| + * num_chunks:
|
| + * ===========
|
| + * If num_chunks is positive, then the "keep" parameter specifies the manner
|
| + * for handling only those chunks appearing in the chunk_list array,
|
| + * otherwise the chunk list array is ignored.
|
| + *
|
| + * If num_chunks is 0 the "keep" parameter specifies the default behavior for
|
| + * unknown chunks, as described above.
|
| + *
|
| + * If num_chunks is negative, then the "keep" parameter specifies the manner
|
| + * for handling all unknown chunks plus all chunks recognized by libpng
|
| + * except for the IHDR, PLTE, tRNS, IDAT, and IEND chunks (which continue to
|
| + * be processed by libpng.
|
| + */
|
| +PNG_EXPORT(172, void, png_set_keep_unknown_chunks, (png_structrp png_ptr,
|
| + int keep, png_const_bytep chunk_list, int num_chunks));
|
| +
|
| +/* The "keep" PNG_HANDLE_CHUNK_ parameter for the specified chunk is returned;
|
| + * the result is therefore true (non-zero) if special handling is required,
|
| + * false for the default handling.
|
| + */
|
| +PNG_EXPORT(173, int, png_handle_as_unknown, (png_const_structrp png_ptr,
|
| + png_const_bytep chunk_name));
|
| +#endif
|
| +
|
| +#ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
|
| +PNG_EXPORT(174, void, png_set_unknown_chunks, (png_const_structrp png_ptr,
|
| + png_inforp info_ptr, png_const_unknown_chunkp unknowns,
|
| + int num_unknowns));
|
| + /* NOTE: prior to 1.6.0 this routine set the 'location' field of the added
|
| + * unknowns to the location currently stored in the png_struct. This is
|
| + * invariably the wrong value on write. To fix this call the following API
|
| + * for each chunk in the list with the correct location. If you know your
|
| + * code won't be compiled on earlier versions you can rely on
|
| + * png_set_unknown_chunks(write-ptr, png_get_unknown_chunks(read-ptr)) doing
|
| + * the correct thing.
|
| + */
|
| +
|
| +PNG_EXPORT(175, void, png_set_unknown_chunk_location,
|
| + (png_const_structrp png_ptr, png_inforp info_ptr, int chunk, int location));
|
| +
|
| +PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structrp png_ptr,
|
| + png_inforp 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));
|
| +PNG_EXPORT(177, void, png_set_invalid, (png_const_structrp png_ptr,
|
| + png_inforp 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));
|
| +PNG_EXPORT(178, void, png_read_png, (png_structrp png_ptr, png_inforp info_ptr,
|
| + int transforms, png_voidp params));
|
| +PNG_EXPORT(179, void, png_write_png, (png_structrp png_ptr, png_inforp info_ptr,
|
| + int transforms, png_voidp params));
|
| +#endif
|
| +
|
| +PNG_EXPORT(180, png_const_charp, png_get_copyright,
|
| + (png_const_structrp png_ptr));
|
| +PNG_EXPORT(181, png_const_charp, png_get_header_ver,
|
| + (png_const_structrp png_ptr));
|
| +PNG_EXPORT(182, png_const_charp, png_get_header_version,
|
| + (png_const_structrp png_ptr));
|
| +PNG_EXPORT(183, png_const_charp, png_get_libpng_ver,
|
| + (png_const_structrp 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));
|
| +PNG_EXPORT(184, png_uint_32, png_permit_mng_features, (png_structrp png_ptr,
|
| + png_uint_32 mng_features_permitted));
|
| #endif
|
|
|
| /* For use in png_set_keep_unknown, added to version 1.2.6 */
|
| @@ -2724,95 +2529,151 @@ extern PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp
|
| #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 */
|
| +#define PNG_HANDLE_CHUNK_LAST 4
|
|
|
| /* 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));
|
| +PNG_EXPORT(185, void, png_set_strip_error_numbers, (png_structrp png_ptr,
|
| + png_uint_32 strip_mode));
|
| #endif
|
|
|
| -/* Added at libpng-1.2.6 */
|
| +/* Added in 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
|
| - */
|
| +PNG_EXPORT(186, void, png_set_user_limits, (png_structrp png_ptr,
|
| + png_uint_32 user_width_max, png_uint_32 user_height_max));
|
| +PNG_EXPORT(187, png_uint_32, png_get_user_width_max,
|
| + (png_const_structrp png_ptr));
|
| +PNG_EXPORT(188, png_uint_32, png_get_user_height_max,
|
| + (png_const_structrp png_ptr));
|
| +/* Added in libpng-1.4.0 */
|
| +PNG_EXPORT(189, void, png_set_chunk_cache_max, (png_structrp png_ptr,
|
| + png_uint_32 user_chunk_cache_max));
|
| +PNG_EXPORT(190, png_uint_32, png_get_chunk_cache_max,
|
| + (png_const_structrp png_ptr));
|
| +/* Added in libpng-1.4.1 */
|
| +PNG_EXPORT(191, void, png_set_chunk_malloc_max, (png_structrp png_ptr,
|
| + png_alloc_size_t user_chunk_cache_max));
|
| +PNG_EXPORT(192, png_alloc_size_t, png_get_chunk_malloc_max,
|
| + (png_const_structrp png_ptr));
|
| +#endif
|
| +
|
| +#if defined(PNG_INCH_CONVERSIONS_SUPPORTED)
|
| +PNG_EXPORT(193, png_uint_32, png_get_pixels_per_inch,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr));
|
| +
|
| +PNG_EXPORT(194, png_uint_32, png_get_x_pixels_per_inch,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr));
|
| +
|
| +PNG_EXPORT(195, png_uint_32, png_get_y_pixels_per_inch,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr));
|
| +
|
| +PNG_FP_EXPORT(196, float, png_get_x_offset_inches,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr))
|
| +#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
|
| +PNG_FIXED_EXPORT(211, png_fixed_point, png_get_x_offset_inches_fixed,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr))
|
| +#endif
|
| +
|
| +PNG_FP_EXPORT(197, float, png_get_y_offset_inches, (png_const_structrp png_ptr,
|
| + png_const_inforp info_ptr))
|
| +#ifdef PNG_FIXED_POINT_SUPPORTED /* otherwise not implemented. */
|
| +PNG_FIXED_EXPORT(212, png_fixed_point, png_get_y_offset_inches_fixed,
|
| + (png_const_structrp png_ptr, png_const_inforp info_ptr))
|
| +#endif
|
| +
|
| +# ifdef PNG_pHYs_SUPPORTED
|
| +PNG_EXPORT(198, png_uint_32, png_get_pHYs_dpi, (png_const_structrp png_ptr,
|
| + png_const_inforp info_ptr, png_uint_32 *res_x, png_uint_32 *res_y,
|
| + int *unit_type));
|
| +# endif /* PNG_pHYs_SUPPORTED */
|
| +#endif /* PNG_INCH_CONVERSIONS_SUPPORTED */
|
| +
|
| +/* Added in libpng-1.4.0 */
|
| +#ifdef PNG_IO_STATE_SUPPORTED
|
| +PNG_EXPORT(199, png_uint_32, png_get_io_state, (png_const_structrp png_ptr));
|
| +
|
| +/* Removed from libpng 1.6; use png_get_io_chunk_type. */
|
| +PNG_REMOVED(200, png_const_bytep, png_get_io_chunk_name, (png_structrp png_ptr),
|
| + PNG_DEPRECATED)
|
| +
|
| +PNG_EXPORT(216, png_uint_32, png_get_io_chunk_type,
|
| + (png_const_structrp png_ptr));
|
| +
|
| +/* The flags returned by png_get_io_state() are the following: */
|
| +# define PNG_IO_NONE 0x0000 /* no I/O at this moment */
|
| +# define PNG_IO_READING 0x0001 /* currently reading */
|
| +# define PNG_IO_WRITING 0x0002 /* currently writing */
|
| +# define PNG_IO_SIGNATURE 0x0010 /* currently at the file signature */
|
| +# define PNG_IO_CHUNK_HDR 0x0020 /* currently at the chunk header */
|
| +# define PNG_IO_CHUNK_DATA 0x0040 /* currently at the chunk data */
|
| +# define PNG_IO_CHUNK_CRC 0x0080 /* currently at the chunk crc */
|
| +# define PNG_IO_MASK_OP 0x000f /* current operation: reading/writing */
|
| +# define PNG_IO_MASK_LOC 0x00f0 /* current location: sig/hdr/data/crc */
|
| +#endif /* ?PNG_IO_STATE_SUPPORTED */
|
| +
|
| +/* Interlace support. The following macros are always defined so that if
|
| + * libpng interlace handling is turned off the macros may be used to handle
|
| + * interlaced images within the application.
|
| + */
|
| +#define PNG_INTERLACE_ADAM7_PASSES 7
|
| +
|
| +/* Two macros to return the first row and first column of the original,
|
| + * full, image which appears in a given pass. 'pass' is in the range 0
|
| + * to 6 and the result is in the range 0 to 7.
|
| + */
|
| +#define PNG_PASS_START_ROW(pass) (((1&~(pass))<<(3-((pass)>>1)))&7)
|
| +#define PNG_PASS_START_COL(pass) (((1& (pass))<<(3-(((pass)+1)>>1)))&7)
|
| +
|
| +/* A macro to return the offset between pixels in the output row for a pair of
|
| + * pixels in the input - effectively the inverse of the 'COL_SHIFT' macro that
|
| + * follows. Note that ROW_OFFSET is the offset from one row to the next whereas
|
| + * COL_OFFSET is from one column to the next, within a row.
|
| + */
|
| +#define PNG_PASS_ROW_OFFSET(pass) ((pass)>2?(8>>(((pass)-1)>>1)):8)
|
| +#define PNG_PASS_COL_OFFSET(pass) (1<<((7-(pass))>>1))
|
| +
|
| +/* Two macros to help evaluate the number of rows or columns in each
|
| + * pass. This is expressed as a shift - effectively log2 of the number or
|
| + * rows or columns in each 8x8 tile of the original image.
|
| + */
|
| +#define PNG_PASS_ROW_SHIFT(pass) ((pass)>2?(8-(pass))>>1:3)
|
| +#define PNG_PASS_COL_SHIFT(pass) ((pass)>1?(7-(pass))>>1:3)
|
| +
|
| +/* Hence two macros to determine the number of rows or columns in a given
|
| + * pass of an image given its height or width. In fact these macros may
|
| + * return non-zero even though the sub-image is empty, because the other
|
| + * dimension may be empty for a small image.
|
| + */
|
| +#define PNG_PASS_ROWS(height, pass) (((height)+(((1<<PNG_PASS_ROW_SHIFT(pass))\
|
| + -1)-PNG_PASS_START_ROW(pass)))>>PNG_PASS_ROW_SHIFT(pass))
|
| +#define PNG_PASS_COLS(width, pass) (((width)+(((1<<PNG_PASS_COL_SHIFT(pass))\
|
| + -1)-PNG_PASS_START_COL(pass)))>>PNG_PASS_COL_SHIFT(pass))
|
| +
|
| +/* For the reader row callbacks (both progressive and sequential) it is
|
| + * necessary to find the row in the output image given a row in an interlaced
|
| + * image, so two more macros:
|
| + */
|
| +#define PNG_ROW_FROM_PASS_ROW(y_in, pass) \
|
| + (((y_in)<<PNG_PASS_ROW_SHIFT(pass))+PNG_PASS_START_ROW(pass))
|
| +#define PNG_COL_FROM_PASS_COL(x_in, pass) \
|
| + (((x_in)<<PNG_PASS_COL_SHIFT(pass))+PNG_PASS_START_COL(pass))
|
| +
|
| +/* Two macros which return a boolean (0 or 1) saying whether the given row
|
| + * or column is in a particular pass. These use a common utility macro that
|
| + * returns a mask for a given pass - the offset 'off' selects the row or
|
| + * column version. The mask has the appropriate bit set for each column in
|
| + * the tile.
|
| + */
|
| +#define PNG_PASS_MASK(pass,off) ( \
|
| + ((0x110145AF>>(((7-(off))-(pass))<<2)) & 0xF) | \
|
| + ((0x01145AF0>>(((7-(off))-(pass))<<2)) & 0xF0))
|
| +
|
| +#define PNG_ROW_IN_INTERLACE_PASS(y, pass) \
|
| + ((PNG_PASS_MASK(pass,0) >> ((y)&7)) & 1)
|
| +#define PNG_COL_IN_INTERLACE_PASS(x, pass) \
|
| + ((PNG_PASS_MASK(pass,1) >> ((x)&7)) & 1)
|
|
|
| #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
|
| /* With these routines we avoid an integer divide, which will be slower on
|
| @@ -2827,963 +2688,619 @@ extern PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp
|
| * [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 */
|
| + /* 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); \
|
| +# 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)) + 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); \
|
| +# 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)*(65535 \
|
| + - (png_uint_32)(alpha)) + 32768); \
|
| (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(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)) + \
|
| + 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)
|
| -
|
| + (png_uint_32)(bg)*(png_uint_32)(65535 - (png_uint_32)(alpha)) + \
|
| + 32767) / 65535)
|
| #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));
|
| +#ifdef PNG_READ_INT_FUNCTIONS_SUPPORTED
|
| +PNG_EXPORT(201, png_uint_32, png_get_uint_32, (png_const_bytep buf));
|
| +PNG_EXPORT(202, png_uint_16, png_get_uint_16, (png_const_bytep buf));
|
| +PNG_EXPORT(203, png_int_32, png_get_int_32, (png_const_bytep buf));
|
| +#endif
|
| +
|
| +PNG_EXPORT(204, png_uint_32, png_get_uint_31, (png_const_structrp png_ptr,
|
| + png_const_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 32-bit number into a buffer in PNG byte order (big-endian). */
|
| +#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
|
| +PNG_EXPORT(205, void, png_save_uint_32, (png_bytep buf, png_uint_32 i));
|
| +#endif
|
| +#ifdef PNG_SAVE_INT_32_SUPPORTED
|
| +PNG_EXPORT(206, void, png_save_int_32, (png_bytep buf, png_int_32 i));
|
| +#endif
|
|
|
| /* 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));
|
| +#ifdef PNG_WRITE_INT_FUNCTIONS_SUPPORTED
|
| +PNG_EXPORT(207, void, png_save_uint_16, (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.
|
| +#ifdef PNG_USE_READ_MACROS
|
| +/* Inline macros to do direct reads of bytes from the input buffer.
|
| + * The png_get_int_32() routine assumes we are using two's complement
|
| + * format for negative values, which is almost certainly true.
|
| */
|
| -PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, png_bytep ptr,
|
| - png_size_t length)) PNG_PRIVATE;
|
| +# define PNG_get_uint_32(buf) \
|
| + (((png_uint_32)(*(buf)) << 24) + \
|
| + ((png_uint_32)(*((buf) + 1)) << 16) + \
|
| + ((png_uint_32)(*((buf) + 2)) << 8) + \
|
| + ((png_uint_32)(*((buf) + 3))))
|
|
|
| -#ifdef PNG_WRITE_FLUSH_SUPPORTED
|
| -PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)) PNG_PRIVATE;
|
| + /* From libpng-1.4.0 until 1.4.4, the png_get_uint_16 macro (but not the
|
| + * function) incorrectly returned a value of type png_uint_32.
|
| + */
|
| +# define PNG_get_uint_16(buf) \
|
| + ((png_uint_16) \
|
| + (((unsigned int)(*(buf)) << 8) + \
|
| + ((unsigned int)(*((buf) + 1)))))
|
| +
|
| +# define PNG_get_int_32(buf) \
|
| + ((png_int_32)((*(buf) & 0x80) \
|
| + ? -((png_int_32)((png_get_uint_32(buf) ^ 0xffffffffL) + 1)) \
|
| + : (png_int_32)png_get_uint_32(buf)))
|
| +
|
| + /* If PNG_PREFIX is defined the same thing as below happens in pnglibconf.h,
|
| + * but defining a macro name prefixed with PNG_PREFIX.
|
| + */
|
| +# ifndef PNG_PREFIX
|
| +# define png_get_uint_32(buf) PNG_get_uint_32(buf)
|
| +# define png_get_uint_16(buf) PNG_get_uint_16(buf)
|
| +# define png_get_int_32(buf) PNG_get_int_32(buf)
|
| +# endif
|
| +#else
|
| +# ifdef PNG_PREFIX
|
| + /* No macros; revert to the (redefined) function */
|
| +# define PNG_get_uint_32 (png_get_uint_32)
|
| +# define PNG_get_uint_16 (png_get_uint_16)
|
| +# define PNG_get_int_32 (png_get_int_32)
|
| +# endif
|
| #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.
|
| +/*******************************************************************************
|
| + * SIMPLIFIED API
|
| + *******************************************************************************
|
| + *
|
| + * Please read the documentation in libpng-manual.txt (TODO: write said
|
| + * documentation) if you don't understand what follows.
|
| + *
|
| + * The simplified API hides the details of both libpng and the PNG file format
|
| + * itself. It allows PNG files to be read into a very limited number of
|
| + * in-memory bitmap formats or to be written from the same formats. If these
|
| + * formats do not accomodate your needs then you can, and should, use the more
|
| + * sophisticated APIs above - these support a wide variety of in-memory formats
|
| + * and a wide variety of sophisticated transformations to those formats as well
|
| + * as a wide variety of APIs to manipulate ancillary information.
|
| + *
|
| + * To read a PNG file using the simplified API:
|
| + *
|
| + * 1) Declare a 'png_image' structure (see below) on the stack and set the
|
| + * version field to PNG_IMAGE_VERSION.
|
| + * 2) Call the appropriate png_image_begin_read... function.
|
| + * 3) Set the png_image 'format' member to the required sample format.
|
| + * 4) Allocate a buffer for the image and, if required, the color-map.
|
| + * 5) Call png_image_finish_read to read the image and, if required, the
|
| + * color-map into your buffers.
|
| + *
|
| + * There are no restrictions on the format of the PNG input itself; all valid
|
| + * color types, bit depths, and interlace methods are acceptable, and the
|
| + * input image is transformed as necessary to the requested in-memory format
|
| + * during the png_image_finish_read() step. The only caveat is that if you
|
| + * request a color-mapped image from a PNG that is full-color or makes
|
| + * complex use of an alpha channel the transformation is extremely lossy and the
|
| + * result may look terrible.
|
| + *
|
| + * To write a PNG file using the simplified API:
|
| + *
|
| + * 1) Declare a 'png_image' structure on the stack and memset() it to all zero.
|
| + * 2) Initialize the members of the structure that describe the image, setting
|
| + * the 'format' member to the format of the image samples.
|
| + * 3) Call the appropriate png_image_write... function with a pointer to the
|
| + * image and, if necessary, the color-map to write the PNG data.
|
| + *
|
| + * png_image is a structure that describes the in-memory format of an image
|
| + * when it is being read or defines the in-memory format of an image that you
|
| + * need to write:
|
| */
|
| -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
|
| +#define PNG_IMAGE_VERSION 1
|
|
|
| -#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
|
| +typedef struct png_control *png_controlp;
|
| +typedef struct
|
| +{
|
| + png_controlp opaque; /* Initialize to NULL, free with png_image_free */
|
| + png_uint_32 version; /* Set to PNG_IMAGE_VERSION */
|
| + png_uint_32 width; /* Image width in pixels (columns) */
|
| + png_uint_32 height; /* Image height in pixels (rows) */
|
| + png_uint_32 format; /* Image format as defined below */
|
| + png_uint_32 flags; /* A bit mask containing informational flags */
|
| + png_uint_32 colormap_entries;
|
| + /* Number of entries in the color-map */
|
| +
|
| + /* In the event of an error or warning the following field will be set to a
|
| + * non-zero value and the 'message' field will contain a '\0' terminated
|
| + * string with the libpng error or warning message. If both warnings and
|
| + * an error were encountered, only the error is recorded. If there
|
| + * are multiple warnings, only the first one is recorded.
|
| + *
|
| + * The upper 30 bits of this value are reserved, the low two bits contain
|
| + * a value as follows:
|
| + */
|
| +# define PNG_IMAGE_WARNING 1
|
| +# define PNG_IMAGE_ERROR 2
|
| + /*
|
| + * The result is a two bit code such that a value more than 1 indicates
|
| + * a failure in the API just called:
|
| + *
|
| + * 0 - no warning or error
|
| + * 1 - warning
|
| + * 2 - error
|
| + * 3 - error preceded by warning
|
| + */
|
| +# define PNG_IMAGE_FAILED(png_cntrl) ((((png_cntrl).warning_or_error)&0x03)>1)
|
|
|
| -#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
|
| + png_uint_32 warning_or_error;
|
|
|
| -#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
|
| + char message[64];
|
| +} png_image, *png_imagep;
|
|
|
| -#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
|
| +/* The samples of the image have one to four channels whose components have
|
| + * original values in the range 0 to 1.0:
|
| + *
|
| + * 1: A single gray or luminance channel (G).
|
| + * 2: A gray/luminance channel and an alpha channel (GA).
|
| + * 3: Three red, green, blue color channels (RGB).
|
| + * 4: Three color channels and an alpha channel (RGBA).
|
| + *
|
| + * The components are encoded in one of two ways:
|
| + *
|
| + * a) As a small integer, value 0..255, contained in a single byte. For the
|
| + * alpha channel the original value is simply value/255. For the color or
|
| + * luminance channels the value is encoded according to the sRGB specification
|
| + * and matches the 8-bit format expected by typical display devices.
|
| + *
|
| + * The color/gray channels are not scaled (pre-multiplied) by the alpha
|
| + * channel and are suitable for passing to color management software.
|
| + *
|
| + * b) As a value in the range 0..65535, contained in a 2-byte integer. All
|
| + * channels can be converted to the original value by dividing by 65535; all
|
| + * channels are linear. Color channels use the RGB encoding (RGB end-points) of
|
| + * the sRGB specification. This encoding is identified by the
|
| + * PNG_FORMAT_FLAG_LINEAR flag below.
|
| + *
|
| + * When the simplified API needs to convert between sRGB and linear colorspaces,
|
| + * the actual sRGB transfer curve defined in the sRGB specification (see the
|
| + * article at http://en.wikipedia.org/wiki/SRGB) is used, not the gamma=1/2.2
|
| + * approximation used elsewhere in libpng.
|
| + *
|
| + * When an alpha channel is present it is expected to denote pixel coverage
|
| + * of the color or luminance channels and is returned as an associated alpha
|
| + * channel: the color/gray channels are scaled (pre-multiplied) by the alpha
|
| + * value.
|
| + *
|
| + * The samples are either contained directly in the image data, between 1 and 8
|
| + * bytes per pixel according to the encoding, or are held in a color-map indexed
|
| + * by bytes in the image data. In the case of a color-map the color-map entries
|
| + * are individual samples, encoded as above, and the image data has one byte per
|
| + * pixel to select the relevant sample from the color-map.
|
| + */
|
|
|
| -#ifdef PNG_WRITE_tIME_SUPPORTED
|
| -PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr,
|
| - png_timep mod_time)) PNG_PRIVATE;
|
| -#endif
|
| +/* PNG_FORMAT_*
|
| + *
|
| + * #defines to be used in png_image::format. Each #define identifies a
|
| + * particular layout of sample data and, if present, alpha values. There are
|
| + * separate defines for each of the two component encodings.
|
| + *
|
| + * A format is built up using single bit flag values. All combinations are
|
| + * valid. Formats can be built up from the flag values or you can use one of
|
| + * the predefined values below. When testing formats always use the FORMAT_FLAG
|
| + * macros to test for individual features - future versions of the library may
|
| + * add new flags.
|
| + *
|
| + * When reading or writing color-mapped images the format should be set to the
|
| + * format of the entries in the color-map then png_image_{read,write}_colormap
|
| + * called to read or write the color-map and set the format correctly for the
|
| + * image data. Do not set the PNG_FORMAT_FLAG_COLORMAP bit directly!
|
| + *
|
| + * NOTE: libpng can be built with particular features disabled, if you see
|
| + * compiler errors because the definition of one of the following flags has been
|
| + * compiled out it is because libpng does not have the required support. It is
|
| + * possible, however, for the libpng configuration to enable the format on just
|
| + * read or just write; in that case you may see an error at run time. You can
|
| + * guard against this by checking for the definition of the appropriate
|
| + * "_SUPPORTED" macro, one of:
|
| + *
|
| + * PNG_SIMPLIFIED_{READ,WRITE}_{BGR,AFIRST}_SUPPORTED
|
| + */
|
| +#define PNG_FORMAT_FLAG_ALPHA 0x01U /* format with an alpha channel */
|
| +#define PNG_FORMAT_FLAG_COLOR 0x02U /* color format: otherwise grayscale */
|
| +#define PNG_FORMAT_FLAG_LINEAR 0x04U /* 2 byte channels else 1 byte */
|
| +#define PNG_FORMAT_FLAG_COLORMAP 0x08U /* image data is color-mapped */
|
|
|
| -#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
|
| +#ifdef PNG_FORMAT_BGR_SUPPORTED
|
| +# define PNG_FORMAT_FLAG_BGR 0x10U /* BGR colors, else order is RGB */
|
| #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;
|
| +#ifdef PNG_FORMAT_AFIRST_SUPPORTED
|
| +# define PNG_FORMAT_FLAG_AFIRST 0x20U /* alpha channel comes first */
|
| #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;
|
| +/* Commonly used formats have predefined macros.
|
| + *
|
| + * First the single byte (sRGB) formats:
|
| + */
|
| +#define PNG_FORMAT_GRAY 0
|
| +#define PNG_FORMAT_GA PNG_FORMAT_FLAG_ALPHA
|
| +#define PNG_FORMAT_AG (PNG_FORMAT_GA|PNG_FORMAT_FLAG_AFIRST)
|
| +#define PNG_FORMAT_RGB PNG_FORMAT_FLAG_COLOR
|
| +#define PNG_FORMAT_BGR (PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_BGR)
|
| +#define PNG_FORMAT_RGBA (PNG_FORMAT_RGB|PNG_FORMAT_FLAG_ALPHA)
|
| +#define PNG_FORMAT_ARGB (PNG_FORMAT_RGBA|PNG_FORMAT_FLAG_AFIRST)
|
| +#define PNG_FORMAT_BGRA (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_ALPHA)
|
| +#define PNG_FORMAT_ABGR (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_AFIRST)
|
| +
|
| +/* Then the linear 2-byte formats. When naming these "Y" is used to
|
| + * indicate a luminance (gray) channel.
|
| + */
|
| +#define PNG_FORMAT_LINEAR_Y PNG_FORMAT_FLAG_LINEAR
|
| +#define PNG_FORMAT_LINEAR_Y_ALPHA (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_ALPHA)
|
| +#define PNG_FORMAT_LINEAR_RGB (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR)
|
| +#define PNG_FORMAT_LINEAR_RGB_ALPHA \
|
| + (PNG_FORMAT_FLAG_LINEAR|PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA)
|
| +
|
| +/* With color-mapped formats the image data is one byte for each pixel, the byte
|
| + * is an index into the color-map which is formatted as above. To obtain a
|
| + * color-mapped format it is sufficient just to add the PNG_FOMAT_FLAG_COLORMAP
|
| + * to one of the above definitions, or you can use one of the definitions below.
|
| + */
|
| +#define PNG_FORMAT_RGB_COLORMAP (PNG_FORMAT_RGB|PNG_FORMAT_FLAG_COLORMAP)
|
| +#define PNG_FORMAT_BGR_COLORMAP (PNG_FORMAT_BGR|PNG_FORMAT_FLAG_COLORMAP)
|
| +#define PNG_FORMAT_RGBA_COLORMAP (PNG_FORMAT_RGBA|PNG_FORMAT_FLAG_COLORMAP)
|
| +#define PNG_FORMAT_ARGB_COLORMAP (PNG_FORMAT_ARGB|PNG_FORMAT_FLAG_COLORMAP)
|
| +#define PNG_FORMAT_BGRA_COLORMAP (PNG_FORMAT_BGRA|PNG_FORMAT_FLAG_COLORMAP)
|
| +#define PNG_FORMAT_ABGR_COLORMAP (PNG_FORMAT_ABGR|PNG_FORMAT_FLAG_COLORMAP)
|
| +
|
| +/* PNG_IMAGE macros
|
| + *
|
| + * These are convenience macros to derive information from a png_image
|
| + * structure. The PNG_IMAGE_SAMPLE_ macros return values appropriate to the
|
| + * actual image sample values - either the entries in the color-map or the
|
| + * pixels in the image. The PNG_IMAGE_PIXEL_ macros return corresponding values
|
| + * for the pixels and will always return 1 for color-mapped formats. The
|
| + * remaining macros return information about the rows in the image and the
|
| + * complete image.
|
| + *
|
| + * NOTE: All the macros that take a png_image::format parameter are compile time
|
| + * constants if the format parameter is, itself, a constant. Therefore these
|
| + * macros can be used in array declarations and case labels where required.
|
| + * Similarly the macros are also pre-processor constants (sizeof is not used) so
|
| + * they can be used in #if tests.
|
| + *
|
| + * First the information about the samples.
|
| */
|
| -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;
|
| +#define PNG_IMAGE_SAMPLE_CHANNELS(fmt)\
|
| + (((fmt)&(PNG_FORMAT_FLAG_COLOR|PNG_FORMAT_FLAG_ALPHA))+1)
|
| + /* Return the total number of channels in a given format: 1..4 */
|
|
|
| -/* 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));
|
| +#define PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt)\
|
| + ((((fmt) & PNG_FORMAT_FLAG_LINEAR) >> 2)+1)
|
| + /* Return the size in bytes of a single component of a pixel or color-map
|
| + * entry (as appropriate) in the image: 1 or 2.
|
| + */
|
|
|
| -/* 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;
|
| +#define PNG_IMAGE_SAMPLE_SIZE(fmt)\
|
| + (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * PNG_IMAGE_SAMPLE_COMPONENT_SIZE(fmt))
|
| + /* This is the size of the sample data for one sample. If the image is
|
| + * color-mapped it is the size of one color-map entry (and image pixels are
|
| + * one byte in size), otherwise it is the size of one image pixel.
|
| + */
|
|
|
| -/* 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
|
| +#define PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(fmt)\
|
| + (PNG_IMAGE_SAMPLE_CHANNELS(fmt) * 256)
|
| + /* The maximum size of the color-map required by the format expressed in a
|
| + * count of components. This can be used to compile-time allocate a
|
| + * color-map:
|
| + *
|
| + * png_uint_16 colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(linear_fmt)];
|
| + *
|
| + * png_byte colormap[PNG_IMAGE_MAXIMUM_COLORMAP_COMPONENTS(sRGB_fmt)];
|
| + *
|
| + * Alternatively use the PNG_IMAGE_COLORMAP_SIZE macro below to use the
|
| + * information from one of the png_image_begin_read_ APIs and dynamically
|
| + * allocate the required memory.
|
| + */
|
|
|
| -#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
|
| +/* Corresponding information about the pixels */
|
| +#define PNG_IMAGE_PIXEL_(test,fmt)\
|
| + (((fmt)&PNG_FORMAT_FLAG_COLORMAP)?1:test(fmt))
|
|
|
| -#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
|
| +#define PNG_IMAGE_PIXEL_CHANNELS(fmt)\
|
| + PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_CHANNELS,fmt)
|
| + /* The number of separate channels (components) in a pixel; 1 for a
|
| + * color-mapped image.
|
| + */
|
|
|
| -#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
|
| +#define PNG_IMAGE_PIXEL_COMPONENT_SIZE(fmt)\
|
| + PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_COMPONENT_SIZE,fmt)
|
| + /* The size, in bytes, of each component in a pixel; 1 for a color-mapped
|
| + * image.
|
| + */
|
|
|
| -#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
|
| +#define PNG_IMAGE_PIXEL_SIZE(fmt) PNG_IMAGE_PIXEL_(PNG_IMAGE_SAMPLE_SIZE,fmt)
|
| + /* The size, in bytes, of a complete pixel; 1 for a color-mapped image. */
|
|
|
| -#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
|
| +/* Information about the whole row, or whole image */
|
| +#define PNG_IMAGE_ROW_STRIDE(image)\
|
| + (PNG_IMAGE_PIXEL_CHANNELS((image).format) * (image).width)
|
| + /* Return the total number of components in a single row of the image; this
|
| + * is the minimum 'row stride', the minimum count of components between each
|
| + * row. For a color-mapped image this is the minimum number of bytes in a
|
| + * row.
|
| + */
|
|
|
| -#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
|
| +#define PNG_IMAGE_BUFFER_SIZE(image, row_stride)\
|
| + (PNG_IMAGE_PIXEL_COMPONENT_SIZE((image).format)*(image).height*(row_stride))
|
| + /* Return the size, in bytes, of an image buffer given a png_image and a row
|
| + * stride - the number of components to leave space for in each row.
|
| + */
|
|
|
| -#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
|
| +#define PNG_IMAGE_SIZE(image)\
|
| + PNG_IMAGE_BUFFER_SIZE(image, PNG_IMAGE_ROW_STRIDE(image))
|
| + /* Return the size, in bytes, of the image in memory given just a png_image;
|
| + * the row stride is the minimum stride required for the image.
|
| + */
|
|
|
| -#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
|
| +#define PNG_IMAGE_COLORMAP_SIZE(image)\
|
| + (PNG_IMAGE_SAMPLE_SIZE((image).format) * (image).colormap_entries)
|
| + /* Return the size, in bytes, of the color-map of this image. If the image
|
| + * format is not a color-map format this will return a size sufficient for
|
| + * 256 entries in the given format; check PNG_FORMAT_FLAG_COLORMAP if
|
| + * you don't want to allocate a color-map in this case.
|
| + */
|
|
|
| -#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
|
| +/* PNG_IMAGE_FLAG_*
|
| + *
|
| + * Flags containing additional information about the image are held in the
|
| + * 'flags' field of png_image.
|
| + */
|
| +#define PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB 0x01
|
| + /* This indicates the the RGB values of the in-memory bitmap do not
|
| + * correspond to the red, green and blue end-points defined by sRGB.
|
| + */
|
|
|
| -#ifdef PNG_READ_PACK_SUPPORTED
|
| -PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info,
|
| - png_bytep row)) PNG_PRIVATE;
|
| -#endif
|
| +#define PNG_IMAGE_FLAG_FAST 0x02
|
| + /* On write emphasise speed over compression; the resultant PNG file will be
|
| + * larger but will be produced significantly faster, particular for large
|
| + * images. Do not use this option for images which will be distributed, only
|
| + * used it when producing intermediate files that will be read back in
|
| + * repeatedly. For a typical 24-bit image the option will double the read
|
| + * speed at the cost of increasing the image size by 25%, however for many
|
| + * more compressible images the PNG file can be 10 times larger with only a
|
| + * slight speed gain.
|
| + */
|
|
|
| -#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
|
| +#define PNG_IMAGE_FLAG_16BIT_sRGB 0x04
|
| + /* On read if the image is a 16-bit per component image and there is no gAMA
|
| + * or sRGB chunk assume that the components are sRGB encoded. Notice that
|
| + * images output by the simplified API always have gamma information; setting
|
| + * this flag only affects the interpretation of 16-bit images from an
|
| + * external source. It is recommended that the application expose this flag
|
| + * to the user; the user can normally easily recognize the difference between
|
| + * linear and sRGB encoding. This flag has no effect on write - the data
|
| + * passed to the write APIs must have the correct encoding (as defined
|
| + * above.)
|
| + *
|
| + * If the flag is not set (the default) input 16-bit per component data is
|
| + * assumed to be linear.
|
| + *
|
| + * NOTE: the flag can only be set after the png_image_begin_read_ call,
|
| + * because that call initializes the 'flags' field.
|
| + */
|
|
|
| -#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_SIMPLIFIED_READ_SUPPORTED
|
| +/* READ APIs
|
| + * ---------
|
| + *
|
| + * The png_image passed to the read APIs must have been initialized by setting
|
| + * the png_controlp field 'opaque' to NULL (or, safer, memset the whole thing.)
|
| + */
|
| +#ifdef PNG_STDIO_SUPPORTED
|
| +PNG_EXPORT(234, int, png_image_begin_read_from_file, (png_imagep image,
|
| + const char *file_name));
|
| + /* The named file is opened for read and the image header is filled in
|
| + * from the PNG header in the file.
|
| + */
|
|
|
| -#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
|
| +PNG_EXPORT(235, int, png_image_begin_read_from_stdio, (png_imagep image,
|
| + FILE* file));
|
| + /* The PNG header is read from the stdio FILE object. */
|
| +#endif /* PNG_STDIO_SUPPORTED */
|
| +
|
| +PNG_EXPORT(236, int, png_image_begin_read_from_memory, (png_imagep image,
|
| + png_const_voidp memory, png_size_t size));
|
| + /* The PNG header is read from the given memory buffer. */
|
| +
|
| +PNG_EXPORT(237, int, png_image_finish_read, (png_imagep image,
|
| + png_const_colorp background, void *buffer, png_int_32 row_stride,
|
| + void *colormap));
|
| + /* Finish reading the image into the supplied buffer and clean up the
|
| + * png_image structure.
|
| + *
|
| + * row_stride is the step, in byte or 2-byte units as appropriate,
|
| + * between adjacent rows. A positive stride indicates that the top-most row
|
| + * is first in the buffer - the normal top-down arrangement. A negative
|
| + * stride indicates that the bottom-most row is first in the buffer.
|
| + *
|
| + * background need only be supplied if an alpha channel must be removed from
|
| + * a png_byte format and the removal is to be done by compositing on a solid
|
| + * color; otherwise it may be NULL and any composition will be done directly
|
| + * onto the buffer. The value is an sRGB color to use for the background,
|
| + * for grayscale output the green channel is used.
|
| + *
|
| + * background must be supplied when an alpha channel must be removed from a
|
| + * single byte color-mapped output format, in other words if:
|
| + *
|
| + * 1) The original format from png_image_begin_read_from_* had
|
| + * PNG_FORMAT_FLAG_ALPHA set.
|
| + * 2) The format set by the application does not.
|
| + * 3) The format set by the application has PNG_FORMAT_FLAG_COLORMAP set and
|
| + * PNG_FORMAT_FLAG_LINEAR *not* set.
|
| + *
|
| + * For linear output removing the alpha channel is always done by compositing
|
| + * on black and background is ignored.
|
| + *
|
| + * colormap must be supplied when PNG_FORMAT_FLAG_COLORMAP is set. It must
|
| + * be at least the size (in bytes) returned by PNG_IMAGE_COLORMAP_SIZE.
|
| + * image->colormap_entries will be updated to the actual number of entries
|
| + * written to the colormap; this may be less than the original value.
|
| + */
|
|
|
| -#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;
|
| +PNG_EXPORT(238, void, png_image_free, (png_imagep image));
|
| + /* Free any data allocated by libpng in image->opaque, setting the pointer to
|
| + * NULL. May be called at any time after the structure is initialized.
|
| + */
|
| +#endif /* PNG_SIMPLIFIED_READ_SUPPORTED */
|
|
|
| -# ifdef PNG_CORRECT_PALETTE_SUPPORTED
|
| -PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr,
|
| - png_colorp palette, int num_palette)) PNG_PRIVATE;
|
| +#ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED
|
| +#ifdef PNG_STDIO_SUPPORTED
|
| +/* WRITE APIS
|
| + * ----------
|
| + * For write you must initialize a png_image structure to describe the image to
|
| + * be written. To do this use memset to set the whole structure to 0 then
|
| + * initialize fields describing your image.
|
| + *
|
| + * version: must be set to PNG_IMAGE_VERSION
|
| + * opaque: must be initialized to NULL
|
| + * width: image width in pixels
|
| + * height: image height in rows
|
| + * format: the format of the data (image and color-map) you wish to write
|
| + * flags: set to 0 unless one of the defined flags applies; set
|
| + * PNG_IMAGE_FLAG_COLORSPACE_NOT_sRGB for color format images where the RGB
|
| + * values do not correspond to the colors in sRGB.
|
| + * colormap_entries: set to the number of entries in the color-map (0 to 256)
|
| + */
|
| +PNG_EXPORT(239, int, png_image_write_to_file, (png_imagep image,
|
| + const char *file, int convert_to_8bit, const void *buffer,
|
| + png_int_32 row_stride, const void *colormap));
|
| + /* Write the image to the named file. */
|
| +
|
| +PNG_EXPORT(240, int, png_image_write_to_stdio, (png_imagep image, FILE *file,
|
| + int convert_to_8_bit, const void *buffer, png_int_32 row_stride,
|
| + const void *colormap));
|
| + /* Write the image to the given (FILE*). */
|
| +
|
| +/* With both write APIs if image is in one of the linear formats with 16-bit
|
| + * data then setting convert_to_8_bit will cause the output to be an 8-bit PNG
|
| + * gamma encoded according to the sRGB specification, otherwise a 16-bit linear
|
| + * encoded PNG file is written.
|
| + *
|
| + * With color-mapped data formats the colormap parameter point to a color-map
|
| + * with at least image->colormap_entries encoded in the specified format. If
|
| + * the format is linear the written PNG color-map will be converted to sRGB
|
| + * regardless of the convert_to_8_bit flag.
|
| + *
|
| + * With all APIs row_stride is handled as in the read APIs - it is the spacing
|
| + * from one row to the next in component sized units (1 or 2 bytes) and if
|
| + * negative indicates a bottom-up row layout in the buffer.
|
| + *
|
| + * Note that the write API does not support interlacing or sub-8-bit pixels.
|
| + */
|
| +#endif /* PNG_STDIO_SUPPORTED */
|
| +#endif /* PNG_SIMPLIFIED_WRITE_SUPPORTED */
|
| +/*******************************************************************************
|
| + * END OF SIMPLIFIED API
|
| + ******************************************************************************/
|
| +
|
| +#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
|
| +PNG_EXPORT(242, void, png_set_check_for_invalid_index,
|
| + (png_structrp png_ptr, int allowed));
|
| +# ifdef PNG_GET_PALETTE_MAX_SUPPORTED
|
| +PNG_EXPORT(243, int, png_get_palette_max, (png_const_structp png_ptr,
|
| + png_const_infop info_ptr));
|
| # 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
|
| +#endif /* CHECK_FOR_INVALID_INDEX */
|
|
|
| -#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.
|
| +/*******************************************************************************
|
| + * IMPLEMENTATION OPTIONS
|
| + *******************************************************************************
|
| + *
|
| + * Support for arbitrary implementation-specific optimizations. The API allows
|
| + * particular options to be turned on or off. 'Option' is the number of the
|
| + * option and 'onoff' is 0 (off) or non-0 (on). The value returned is given
|
| + * by the PNG_OPTION_ defines below.
|
| + *
|
| + * HARDWARE: normally hardware capabilites, such as the Intel SSE instructions,
|
| + * are detected at run time, however sometimes it may be impossible
|
| + * to do this in user mode, in which case it is necessary to discover
|
| + * the capabilities in an OS specific way. Such capabilities are
|
| + * listed here when libpng has support for them and must be turned
|
| + * ON by the application if present.
|
| + *
|
| + * SOFTWARE: sometimes software optimizations actually result in performance
|
| + * decrease on some architectures or systems, or with some sets of
|
| + * PNG images. 'Software' options allow such optimizations to be
|
| + * selected at run time.
|
| */
|
| -
|
| -/* 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;
|
| +#ifdef PNG_SET_OPTION_SUPPORTED
|
| +#ifdef PNG_ARM_NEON_API_SUPPORTED
|
| +# define PNG_ARM_NEON 0 /* HARDWARE: ARM Neon SIMD instructions supported */
|
| #endif
|
| +#define PNG_MAXIMUM_INFLATE_WINDOW 2 /* SOFTWARE: force maximum window */
|
| +#define PNG_OPTION_NEXT 4 /* Next option - numbers must be even */
|
|
|
| -#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
|
| +/* Return values: NOTE: there are four values and 'off' is *not* zero */
|
| +#define PNG_OPTION_UNSET 0 /* Unset - defaults to off */
|
| +#define PNG_OPTION_INVALID 1 /* Option number out of range */
|
| +#define PNG_OPTION_OFF 2
|
| +#define PNG_OPTION_ON 3
|
|
|
| -#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;
|
| +PNG_EXPORT(244, int, png_set_option, (png_structrp png_ptr, int option,
|
| + int onoff));
|
| #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
|
| +/*******************************************************************************
|
| + * END OF HARDWARE OPTIONS
|
| + ******************************************************************************/
|
|
|
| -#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
|
| +/* Maintainer: Put new public prototypes here ^, in libpng.3, and project
|
| + * defs, scripts/pnglibconf.h, and scripts/pnglibconf.h.prebuilt
|
| + */
|
|
|
| -#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
|
| +/* The last ordinal number (this is the *last* one already used; the next
|
| + * one to use is one more than this.) Maintainer, remember to add an entry to
|
| + * scripts/symbols.def as well.
|
| + */
|
| +#ifdef PNG_EXPORT_LAST_ORDINAL
|
| + PNG_EXPORT_LAST_ORDINAL(244);
|
| #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
|
|
|
Chromium Code Reviews
Issue 23271006:
libpng 1.6.3 (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master