nuclear@1: /* png.h - header file for PNG reference library nuclear@1: * nuclear@1: * libpng version 1.2.33 - October 31, 2008 nuclear@1: * Copyright (c) 1998-2008 Glenn Randers-Pehrson nuclear@1: * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) nuclear@1: * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) nuclear@1: * nuclear@1: * Authors and maintainers: nuclear@1: * libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat nuclear@1: * libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger nuclear@1: * libpng versions 0.97, January 1998, through 1.2.33 - October 31, 2008: Glenn nuclear@1: * See also "Contributing Authors", below. nuclear@1: * nuclear@1: * Note about libpng version numbers: nuclear@1: * nuclear@1: * Due to various miscommunications, unforeseen code incompatibilities nuclear@1: * and occasional factors outside the authors' control, version numbering nuclear@1: * on the library has not always been consistent and straightforward. nuclear@1: * The following table summarizes matters since version 0.89c, which was nuclear@1: * the first widely used release: nuclear@1: * nuclear@1: * source png.h png.h shared-lib nuclear@1: * version string int version nuclear@1: * ------- ------ ----- ---------- nuclear@1: * 0.89c "1.0 beta 3" 0.89 89 1.0.89 nuclear@1: * 0.90 "1.0 beta 4" 0.90 90 0.90 [should have been 2.0.90] nuclear@1: * 0.95 "1.0 beta 5" 0.95 95 0.95 [should have been 2.0.95] nuclear@1: * 0.96 "1.0 beta 6" 0.96 96 0.96 [should have been 2.0.96] nuclear@1: * 0.97b "1.00.97 beta 7" 1.00.97 97 1.0.1 [should have been 2.0.97] nuclear@1: * 0.97c 0.97 97 2.0.97 nuclear@1: * 0.98 0.98 98 2.0.98 nuclear@1: * 0.99 0.99 98 2.0.99 nuclear@1: * 0.99a-m 0.99 99 2.0.99 nuclear@1: * 1.00 1.00 100 2.1.0 [100 should be 10000] nuclear@1: * 1.0.0 (from here on, the 100 2.1.0 [100 should be 10000] nuclear@1: * 1.0.1 png.h string is 10001 2.1.0 nuclear@1: * 1.0.1a-e identical to the 10002 from here on, the shared library nuclear@1: * 1.0.2 source version) 10002 is 2.V where V is the source code nuclear@1: * 1.0.2a-b 10003 version, except as noted. nuclear@1: * 1.0.3 10003 nuclear@1: * 1.0.3a-d 10004 nuclear@1: * 1.0.4 10004 nuclear@1: * 1.0.4a-f 10005 nuclear@1: * 1.0.5 (+ 2 patches) 10005 nuclear@1: * 1.0.5a-d 10006 nuclear@1: * 1.0.5e-r 10100 (not source compatible) nuclear@1: * 1.0.5s-v 10006 (not binary compatible) nuclear@1: * 1.0.6 (+ 3 patches) 10006 (still binary incompatible) nuclear@1: * 1.0.6d-f 10007 (still binary incompatible) nuclear@1: * 1.0.6g 10007 nuclear@1: * 1.0.6h 10007 10.6h (testing xy.z so-numbering) nuclear@1: * 1.0.6i 10007 10.6i nuclear@1: * 1.0.6j 10007 2.1.0.6j (incompatible with 1.0.0) nuclear@1: * 1.0.7beta11-14 DLLNUM 10007 2.1.0.7beta11-14 (binary compatible) nuclear@1: * 1.0.7beta15-18 1 10007 2.1.0.7beta15-18 (binary compatible) nuclear@1: * 1.0.7rc1-2 1 10007 2.1.0.7rc1-2 (binary compatible) nuclear@1: * 1.0.7 1 10007 (still compatible) nuclear@1: * 1.0.8beta1-4 1 10008 2.1.0.8beta1-4 nuclear@1: * 1.0.8rc1 1 10008 2.1.0.8rc1 nuclear@1: * 1.0.8 1 10008 2.1.0.8 nuclear@1: * 1.0.9beta1-6 1 10009 2.1.0.9beta1-6 nuclear@1: * 1.0.9rc1 1 10009 2.1.0.9rc1 nuclear@1: * 1.0.9beta7-10 1 10009 2.1.0.9beta7-10 nuclear@1: * 1.0.9rc2 1 10009 2.1.0.9rc2 nuclear@1: * 1.0.9 1 10009 2.1.0.9 nuclear@1: * 1.0.10beta1 1 10010 2.1.0.10beta1 nuclear@1: * 1.0.10rc1 1 10010 2.1.0.10rc1 nuclear@1: * 1.0.10 1 10010 2.1.0.10 nuclear@1: * 1.0.11beta1-3 1 10011 2.1.0.11beta1-3 nuclear@1: * 1.0.11rc1 1 10011 2.1.0.11rc1 nuclear@1: * 1.0.11 1 10011 2.1.0.11 nuclear@1: * 1.0.12beta1-2 2 10012 2.1.0.12beta1-2 nuclear@1: * 1.0.12rc1 2 10012 2.1.0.12rc1 nuclear@1: * 1.0.12 2 10012 2.1.0.12 nuclear@1: * 1.1.0a-f - 10100 2.1.1.0a-f (branch abandoned) nuclear@1: * 1.2.0beta1-2 2 10200 2.1.2.0beta1-2 nuclear@1: * 1.2.0beta3-5 3 10200 3.1.2.0beta3-5 nuclear@1: * 1.2.0rc1 3 10200 3.1.2.0rc1 nuclear@1: * 1.2.0 3 10200 3.1.2.0 nuclear@1: * 1.2.1beta1-4 3 10201 3.1.2.1beta1-4 nuclear@1: * 1.2.1rc1-2 3 10201 3.1.2.1rc1-2 nuclear@1: * 1.2.1 3 10201 3.1.2.1 nuclear@1: * 1.2.2beta1-6 12 10202 12.so.0.1.2.2beta1-6 nuclear@1: * 1.0.13beta1 10 10013 10.so.0.1.0.13beta1 nuclear@1: * 1.0.13rc1 10 10013 10.so.0.1.0.13rc1 nuclear@1: * 1.2.2rc1 12 10202 12.so.0.1.2.2rc1 nuclear@1: * 1.0.13 10 10013 10.so.0.1.0.13 nuclear@1: * 1.2.2 12 10202 12.so.0.1.2.2 nuclear@1: * 1.2.3rc1-6 12 10203 12.so.0.1.2.3rc1-6 nuclear@1: * 1.2.3 12 10203 12.so.0.1.2.3 nuclear@1: * 1.2.4beta1-3 13 10204 12.so.0.1.2.4beta1-3 nuclear@1: * 1.0.14rc1 13 10014 10.so.0.1.0.14rc1 nuclear@1: * 1.2.4rc1 13 10204 12.so.0.1.2.4rc1 nuclear@1: * 1.0.14 10 10014 10.so.0.1.0.14 nuclear@1: * 1.2.4 13 10204 12.so.0.1.2.4 nuclear@1: * 1.2.5beta1-2 13 10205 12.so.0.1.2.5beta1-2 nuclear@1: * 1.0.15rc1-3 10 10015 10.so.0.1.0.15rc1-3 nuclear@1: * 1.2.5rc1-3 13 10205 12.so.0.1.2.5rc1-3 nuclear@1: * 1.0.15 10 10015 10.so.0.1.0.15 nuclear@1: * 1.2.5 13 10205 12.so.0.1.2.5 nuclear@1: * 1.2.6beta1-4 13 10206 12.so.0.1.2.6beta1-4 nuclear@1: * 1.0.16 10 10016 10.so.0.1.0.16 nuclear@1: * 1.2.6 13 10206 12.so.0.1.2.6 nuclear@1: * 1.2.7beta1-2 13 10207 12.so.0.1.2.7beta1-2 nuclear@1: * 1.0.17rc1 10 10017 10.so.0.1.0.17rc1 nuclear@1: * 1.2.7rc1 13 10207 12.so.0.1.2.7rc1 nuclear@1: * 1.0.17 10 10017 10.so.0.1.0.17 nuclear@1: * 1.2.7 13 10207 12.so.0.1.2.7 nuclear@1: * 1.2.8beta1-5 13 10208 12.so.0.1.2.8beta1-5 nuclear@1: * 1.0.18rc1-5 10 10018 10.so.0.1.0.18rc1-5 nuclear@1: * 1.2.8rc1-5 13 10208 12.so.0.1.2.8rc1-5 nuclear@1: * 1.0.18 10 10018 10.so.0.1.0.18 nuclear@1: * 1.2.8 13 10208 12.so.0.1.2.8 nuclear@1: * 1.2.9beta1-3 13 10209 12.so.0.1.2.9beta1-3 nuclear@1: * 1.2.9beta4-11 13 10209 12.so.0.9[.0] nuclear@1: * 1.2.9rc1 13 10209 12.so.0.9[.0] nuclear@1: * 1.2.9 13 10209 12.so.0.9[.0] nuclear@1: * 1.2.10beta1-8 13 10210 12.so.0.10[.0] nuclear@1: * 1.2.10rc1-3 13 10210 12.so.0.10[.0] nuclear@1: * 1.2.10 13 10210 12.so.0.10[.0] nuclear@1: * 1.2.11beta1-4 13 10211 12.so.0.11[.0] nuclear@1: * 1.0.19rc1-5 10 10019 10.so.0.19[.0] nuclear@1: * 1.2.11rc1-5 13 10211 12.so.0.11[.0] nuclear@1: * 1.0.19 10 10019 10.so.0.19[.0] nuclear@1: * 1.2.11 13 10211 12.so.0.11[.0] nuclear@1: * 1.0.20 10 10020 10.so.0.20[.0] nuclear@1: * 1.2.12 13 10212 12.so.0.12[.0] nuclear@1: * 1.2.13beta1 13 10213 12.so.0.13[.0] nuclear@1: * 1.0.21 10 10021 10.so.0.21[.0] nuclear@1: * 1.2.13 13 10213 12.so.0.13[.0] nuclear@1: * 1.2.14beta1-2 13 10214 12.so.0.14[.0] nuclear@1: * 1.0.22rc1 10 10022 10.so.0.22[.0] nuclear@1: * 1.2.14rc1 13 10214 12.so.0.14[.0] nuclear@1: * 1.0.22 10 10022 10.so.0.22[.0] nuclear@1: * 1.2.14 13 10214 12.so.0.14[.0] nuclear@1: * 1.2.15beta1-6 13 10215 12.so.0.15[.0] nuclear@1: * 1.0.23rc1-5 10 10023 10.so.0.23[.0] nuclear@1: * 1.2.15rc1-5 13 10215 12.so.0.15[.0] nuclear@1: * 1.0.23 10 10023 10.so.0.23[.0] nuclear@1: * 1.2.15 13 10215 12.so.0.15[.0] nuclear@1: * 1.2.16beta1-2 13 10216 12.so.0.16[.0] nuclear@1: * 1.2.16rc1 13 10216 12.so.0.16[.0] nuclear@1: * 1.0.24 10 10024 10.so.0.24[.0] nuclear@1: * 1.2.16 13 10216 12.so.0.16[.0] nuclear@1: * 1.2.17beta1-2 13 10217 12.so.0.17[.0] nuclear@1: * 1.0.25rc1 10 10025 10.so.0.25[.0] nuclear@1: * 1.2.17rc1-3 13 10217 12.so.0.17[.0] nuclear@1: * 1.0.25 10 10025 10.so.0.25[.0] nuclear@1: * 1.2.17 13 10217 12.so.0.17[.0] nuclear@1: * 1.0.26 10 10026 10.so.0.26[.0] nuclear@1: * 1.2.18 13 10218 12.so.0.18[.0] nuclear@1: * 1.2.19beta1-31 13 10219 12.so.0.19[.0] nuclear@1: * 1.0.27rc1-6 10 10027 10.so.0.27[.0] nuclear@1: * 1.2.19rc1-6 13 10219 12.so.0.19[.0] nuclear@1: * 1.0.27 10 10027 10.so.0.27[.0] nuclear@1: * 1.2.19 13 10219 12.so.0.19[.0] nuclear@1: * 1.2.20beta01-04 13 10220 12.so.0.20[.0] nuclear@1: * 1.0.28rc1-6 10 10028 10.so.0.28[.0] nuclear@1: * 1.2.20rc1-6 13 10220 12.so.0.20[.0] nuclear@1: * 1.0.28 10 10028 10.so.0.28[.0] nuclear@1: * 1.2.20 13 10220 12.so.0.20[.0] nuclear@1: * 1.2.21beta1-2 13 10221 12.so.0.21[.0] nuclear@1: * 1.2.21rc1-3 13 10221 12.so.0.21[.0] nuclear@1: * 1.0.29 10 10029 10.so.0.29[.0] nuclear@1: * 1.2.21 13 10221 12.so.0.21[.0] nuclear@1: * 1.2.22beta1-4 13 10222 12.so.0.22[.0] nuclear@1: * 1.0.30rc1 10 10030 10.so.0.30[.0] nuclear@1: * 1.2.22rc1 13 10222 12.so.0.22[.0] nuclear@1: * 1.0.30 10 10030 10.so.0.30[.0] nuclear@1: * 1.2.22 13 10222 12.so.0.22[.0] nuclear@1: * 1.2.23beta01-05 13 10223 12.so.0.23[.0] nuclear@1: * 1.2.23rc01 13 10223 12.so.0.23[.0] nuclear@1: * 1.2.23 13 10223 12.so.0.23[.0] nuclear@1: * 1.2.24beta01-02 13 10224 12.so.0.24[.0] nuclear@1: * 1.2.24rc01 13 10224 12.so.0.24[.0] nuclear@1: * 1.2.24 13 10224 12.so.0.24[.0] nuclear@1: * 1.2.25beta01-06 13 10225 12.so.0.25[.0] nuclear@1: * 1.2.25rc01-02 13 10225 12.so.0.25[.0] nuclear@1: * 1.0.31 10 10031 10.so.0.31[.0] nuclear@1: * 1.2.25 13 10225 12.so.0.25[.0] nuclear@1: * 1.2.26beta01-06 13 10226 12.so.0.26[.0] nuclear@1: * 1.2.26rc01 13 10226 12.so.0.26[.0] nuclear@1: * 1.2.26 13 10226 12.so.0.26[.0] nuclear@1: * 1.0.32 10 10032 10.so.0.32[.0] nuclear@1: * 1.2.27beta01-06 13 10227 12.so.0.27[.0] nuclear@1: * 1.2.27rc01 13 10227 12.so.0.27[.0] nuclear@1: * 1.0.33 10 10033 10.so.0.33[.0] nuclear@1: * 1.2.27 13 10227 12.so.0.27[.0] nuclear@1: * 1.0.34 10 10034 10.so.0.34[.0] nuclear@1: * 1.2.28 13 10228 12.so.0.28[.0] nuclear@1: * 1.2.29beta01-03 13 10229 12.so.0.29[.0] nuclear@1: * 1.2.29rc01 13 10229 12.so.0.29[.0] nuclear@1: * 1.0.35 10 10035 10.so.0.35[.0] nuclear@1: * 1.2.29 13 10229 12.so.0.29[.0] nuclear@1: * 1.0.37 10 10037 10.so.0.37[.0] nuclear@1: * 1.2.30beta01-04 13 10230 12.so.0.30[.0] nuclear@1: * 1.0.38rc01-08 10 10038 10.so.0.38[.0] nuclear@1: * 1.2.30rc01-08 13 10230 12.so.0.30[.0] nuclear@1: * 1.0.38 10 10038 10.so.0.38[.0] nuclear@1: * 1.2.30 13 10230 12.so.0.30[.0] nuclear@1: * 1.0.39rc01-03 10 10039 10.so.0.39[.0] nuclear@1: * 1.2.31rc01-03 13 10231 12.so.0.31[.0] nuclear@1: * 1.0.39 10 10039 10.so.0.39[.0] nuclear@1: * 1.2.31 13 10231 12.so.0.31[.0] nuclear@1: * 1.2.32beta01-02 13 10232 12.so.0.32[.0] nuclear@1: * 1.0.40rc01 10 10040 10.so.0.40[.0] nuclear@1: * 1.2.32rc01 13 10232 12.so.0.32[.0] nuclear@1: * 1.0.40 10 10040 10.so.0.40[.0] nuclear@1: * 1.2.32 13 10232 12.so.0.32[.0] nuclear@1: * 1.2.33beta01-02 13 10233 12.so.0.33[.0] nuclear@1: * 1.2.33rc01-02 13 10233 12.so.0.33[.0] nuclear@1: * 1.0.41rc01 10 10041 10.so.0.41[.0] nuclear@1: * 1.2.33 13 10233 12.so.0.33[.0] nuclear@1: * 1.0.41 10 10041 10.so.0.41[.0] nuclear@1: * nuclear@1: * Henceforth the source version will match the shared-library major nuclear@1: * and minor numbers; the shared-library major version number will be nuclear@1: * used for changes in backward compatibility, as it is intended. The nuclear@1: * PNG_LIBPNG_VER macro, which is not used within libpng but is available nuclear@1: * for applications, is an unsigned integer of the form xyyzz corresponding nuclear@1: * to the source version x.y.z (leading zeros in y and z). Beta versions nuclear@1: * were given the previous public release number plus a letter, until nuclear@1: * version 1.0.6j; from then on they were given the upcoming public nuclear@1: * release number plus "betaNN" or "rcNN". nuclear@1: * nuclear@1: * Binary incompatibility exists only when applications make direct access nuclear@1: * to the info_ptr or png_ptr members through png.h, and the compiled nuclear@1: * application is loaded with a different version of the library. nuclear@1: * nuclear@1: * DLLNUM will change each time there are forward or backward changes nuclear@1: * in binary compatibility (e.g., when a new feature is added). nuclear@1: * nuclear@1: * See libpng.txt or libpng.3 for more information. The PNG specification nuclear@1: * is available as a W3C Recommendation and as an ISO Specification, nuclear@1: * defines should NOT be changed. nuclear@1: */ nuclear@1: #define PNG_INFO_gAMA 0x0001 nuclear@1: #define PNG_INFO_sBIT 0x0002 nuclear@1: #define PNG_INFO_cHRM 0x0004 nuclear@1: #define PNG_INFO_PLTE 0x0008 nuclear@1: #define PNG_INFO_tRNS 0x0010 nuclear@1: #define PNG_INFO_bKGD 0x0020 nuclear@1: #define PNG_INFO_hIST 0x0040 nuclear@1: #define PNG_INFO_pHYs 0x0080 nuclear@1: #define PNG_INFO_oFFs 0x0100 nuclear@1: #define PNG_INFO_tIME 0x0200 nuclear@1: #define PNG_INFO_pCAL 0x0400 nuclear@1: #define PNG_INFO_sRGB 0x0800 /* GR-P, 0.96a */ nuclear@1: #define PNG_INFO_iCCP 0x1000 /* ESR, 1.0.6 */ nuclear@1: #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ nuclear@1: #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ nuclear@1: #define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */ nuclear@1: nuclear@1: /* This is used for the transformation routines, as some of them nuclear@1: * change these values for the row. It also should enable using nuclear@1: * the routines for other purposes. nuclear@1: */ nuclear@1: typedef struct png_row_info_struct nuclear@1: { nuclear@1: png_uint_32 width; /* width of row */ nuclear@1: png_uint_32 rowbytes; /* number of bytes in row */ nuclear@1: png_byte color_type; /* color type of row */ nuclear@1: png_byte bit_depth; /* bit depth of row */ nuclear@1: png_byte channels; /* number of channels (1, 2, 3, or 4) */ nuclear@1: png_byte pixel_depth; /* bits per pixel (depth * channels) */ nuclear@1: } png_row_info; nuclear@1: nuclear@1: typedef png_row_info FAR * png_row_infop; nuclear@1: typedef png_row_info FAR * FAR * png_row_infopp; nuclear@1: nuclear@1: /* These are the function types for the I/O functions and for the functions nuclear@1: * that allow the user to override the default I/O functions with his or her nuclear@1: * own. The png_error_ptr type should match that of user-supplied warning nuclear@1: * and error functions, while the png_rw_ptr type should match that of the nuclear@1: * user read/write data functions. nuclear@1: */ nuclear@1: typedef struct png_struct_def png_struct; nuclear@1: typedef png_struct FAR * png_structp; nuclear@1: nuclear@1: typedef void (PNGAPI *png_error_ptr) PNGARG((png_structp, png_const_charp)); nuclear@1: typedef void (PNGAPI *png_rw_ptr) PNGARG((png_structp, png_bytep, png_size_t)); nuclear@1: typedef void (PNGAPI *png_flush_ptr) PNGARG((png_structp)); nuclear@1: typedef void (PNGAPI *png_read_status_ptr) PNGARG((png_structp, png_uint_32, nuclear@1: int)); nuclear@1: typedef void (PNGAPI *png_write_status_ptr) PNGARG((png_structp, png_uint_32, nuclear@1: int)); nuclear@1: nuclear@1: #ifdef PNG_PROGRESSIVE_READ_SUPPORTED nuclear@1: typedef void (PNGAPI *png_progressive_info_ptr) PNGARG((png_structp, png_infop)); nuclear@1: typedef void (PNGAPI *png_progressive_end_ptr) PNGARG((png_structp, png_infop)); nuclear@1: typedef void (PNGAPI *png_progressive_row_ptr) PNGARG((png_structp, png_bytep, nuclear@1: png_uint_32, int)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ nuclear@1: defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ nuclear@1: defined(PNG_LEGACY_SUPPORTED) nuclear@1: typedef void (PNGAPI *png_user_transform_ptr) PNGARG((png_structp, nuclear@1: png_row_infop, png_bytep)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_USER_CHUNKS_SUPPORTED) nuclear@1: typedef int (PNGAPI *png_user_chunk_ptr) PNGARG((png_structp, png_unknown_chunkp)); nuclear@1: #endif nuclear@1: #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) nuclear@1: typedef void (PNGAPI *png_unknown_chunk_ptr) PNGARG((png_structp)); nuclear@1: #endif nuclear@1: nuclear@1: /* Transform masks for the high-level interface */ nuclear@1: #define PNG_TRANSFORM_IDENTITY 0x0000 /* read and write */ nuclear@1: #define PNG_TRANSFORM_STRIP_16 0x0001 /* read only */ nuclear@1: #define PNG_TRANSFORM_STRIP_ALPHA 0x0002 /* read only */ nuclear@1: #define PNG_TRANSFORM_PACKING 0x0004 /* read and write */ nuclear@1: #define PNG_TRANSFORM_PACKSWAP 0x0008 /* read and write */ nuclear@1: #define PNG_TRANSFORM_EXPAND 0x0010 /* read only */ nuclear@1: #define PNG_TRANSFORM_INVERT_MONO 0x0020 /* read and write */ nuclear@1: #define PNG_TRANSFORM_SHIFT 0x0040 /* read and write */ nuclear@1: #define PNG_TRANSFORM_BGR 0x0080 /* read and write */ nuclear@1: #define PNG_TRANSFORM_SWAP_ALPHA 0x0100 /* read and write */ nuclear@1: #define PNG_TRANSFORM_SWAP_ENDIAN 0x0200 /* read and write */ nuclear@1: #define PNG_TRANSFORM_INVERT_ALPHA 0x0400 /* read and write */ nuclear@1: #define PNG_TRANSFORM_STRIP_FILLER 0x0800 /* WRITE only */ nuclear@1: nuclear@1: /* Flags for MNG supported features */ nuclear@1: #define PNG_FLAG_MNG_EMPTY_PLTE 0x01 nuclear@1: #define PNG_FLAG_MNG_FILTER_64 0x04 nuclear@1: #define PNG_ALL_MNG_FEATURES 0x05 nuclear@1: nuclear@1: typedef png_voidp (*png_malloc_ptr) PNGARG((png_structp, png_size_t)); nuclear@1: typedef void (*png_free_ptr) PNGARG((png_structp, png_voidp)); nuclear@1: nuclear@1: /* The structure that holds the information to read and write PNG files. nuclear@1: * The only people who need to care about what is inside of this are the nuclear@1: * people who will be modifying the library for their own special needs. nuclear@1: * It should NOT be accessed directly by an application, except to store nuclear@1: * the jmp_buf. nuclear@1: */ nuclear@1: nuclear@1: struct png_struct_def nuclear@1: { nuclear@1: #ifdef PNG_SETJMP_SUPPORTED nuclear@1: jmp_buf jmpbuf; /* used in png_error */ nuclear@1: #endif nuclear@1: png_error_ptr error_fn; /* function for printing errors and aborting */ nuclear@1: png_error_ptr warning_fn; /* function for printing warnings */ nuclear@1: png_voidp error_ptr; /* user supplied struct for error functions */ nuclear@1: png_rw_ptr write_data_fn; /* function for writing output data */ nuclear@1: png_rw_ptr read_data_fn; /* function for reading input data */ nuclear@1: png_voidp io_ptr; /* ptr to application struct for I/O functions */ nuclear@1: nuclear@1: #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) nuclear@1: png_user_transform_ptr read_user_transform_fn; /* user read transform */ nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) nuclear@1: png_user_transform_ptr write_user_transform_fn; /* user write transform */ nuclear@1: #endif nuclear@1: nuclear@1: /* These were added in libpng-1.0.2 */ nuclear@1: #if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) nuclear@1: #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ nuclear@1: defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) nuclear@1: png_voidp user_transform_ptr; /* user supplied struct for user transform */ nuclear@1: png_byte user_transform_depth; /* bit depth of user transformed pixels */ nuclear@1: png_byte user_transform_channels; /* channels in user transformed pixels */ nuclear@1: #endif nuclear@1: #endif nuclear@1: nuclear@1: png_uint_32 mode; /* tells us where we are in the PNG file */ nuclear@1: png_uint_32 flags; /* flags indicating various things to libpng */ nuclear@1: png_uint_32 transformations; /* which transformations to perform */ nuclear@1: nuclear@1: z_stream zstream; /* pointer to decompression structure (below) */ nuclear@1: png_bytep zbuf; /* buffer for zlib */ nuclear@1: png_size_t zbuf_size; /* size of zbuf */ nuclear@1: int zlib_level; /* holds zlib compression level */ nuclear@1: int zlib_method; /* holds zlib compression method */ nuclear@1: int zlib_window_bits; /* holds zlib compression window bits */ nuclear@1: int zlib_mem_level; /* holds zlib compression memory level */ nuclear@1: int zlib_strategy; /* holds zlib compression strategy */ nuclear@1: nuclear@1: png_uint_32 width; /* width of image in pixels */ nuclear@1: png_uint_32 height; /* height of image in pixels */ nuclear@1: png_uint_32 num_rows; /* number of rows in current pass */ nuclear@1: png_uint_32 usr_width; /* width of row at start of write */ nuclear@1: png_uint_32 rowbytes; /* size of row in bytes */ nuclear@1: png_uint_32 irowbytes; /* size of current interlaced row in bytes */ nuclear@1: png_uint_32 iwidth; /* width of current interlaced row in pixels */ nuclear@1: png_uint_32 row_number; /* current row in interlace pass */ nuclear@1: png_bytep prev_row; /* buffer to save previous (unfiltered) row */ nuclear@1: png_bytep row_buf; /* buffer to save current (unfiltered) row */ nuclear@1: #ifndef PNG_NO_WRITE_FILTER nuclear@1: png_bytep sub_row; /* buffer to save "sub" row when filtering */ nuclear@1: png_bytep up_row; /* buffer to save "up" row when filtering */ nuclear@1: png_bytep avg_row; /* buffer to save "avg" row when filtering */ nuclear@1: png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */ nuclear@1: #endif nuclear@1: png_row_info row_info; /* used for transformation routines */ nuclear@1: nuclear@1: png_uint_32 idat_size; /* current IDAT size for read */ nuclear@1: png_uint_32 crc; /* current chunk CRC value */ nuclear@1: png_colorp palette; /* palette from the input file */ nuclear@1: png_uint_16 num_palette; /* number of color entries in palette */ nuclear@1: png_uint_16 num_trans; /* number of transparency values */ nuclear@1: png_byte chunk_name[5]; /* null-terminated name of current chunk */ nuclear@1: png_byte compression; /* file compression type (always 0) */ nuclear@1: png_byte filter; /* file filter type (always 0) */ nuclear@1: png_byte interlaced; /* PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */ nuclear@1: png_byte pass; /* current interlace pass (0 - 6) */ nuclear@1: png_byte do_filter; /* row filter flags (see PNG_FILTER_ below ) */ nuclear@1: png_byte color_type; /* color type of file */ nuclear@1: png_byte bit_depth; /* bit depth of file */ nuclear@1: png_byte usr_bit_depth; /* bit depth of users row */ nuclear@1: png_byte pixel_depth; /* number of bits per pixel */ nuclear@1: png_byte channels; /* number of channels in file */ nuclear@1: png_byte usr_channels; /* channels at start of write */ nuclear@1: png_byte sig_bytes; /* magic bytes read/written from start of file */ nuclear@1: nuclear@1: #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) nuclear@1: #ifdef PNG_LEGACY_SUPPORTED nuclear@1: png_byte filler; /* filler byte for pixel expansion */ nuclear@1: #else nuclear@1: png_uint_16 filler; /* filler bytes for pixel expansion */ nuclear@1: #endif nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_bKGD_SUPPORTED) nuclear@1: png_byte background_gamma_type; nuclear@1: # ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: float background_gamma; nuclear@1: # endif nuclear@1: png_color_16 background; /* background color in screen gamma space */ nuclear@1: #if defined(PNG_READ_GAMMA_SUPPORTED) nuclear@1: png_color_16 background_1; /* background normalized to gamma 1.0 */ nuclear@1: #endif nuclear@1: #endif /* PNG_bKGD_SUPPORTED */ nuclear@1: nuclear@1: #if defined(PNG_WRITE_FLUSH_SUPPORTED) nuclear@1: png_flush_ptr output_flush_fn;/* Function for flushing output */ nuclear@1: png_uint_32 flush_dist; /* how many rows apart to flush, 0 - no flush */ nuclear@1: png_uint_32 flush_rows; /* number of rows written since last flush */ nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) nuclear@1: int gamma_shift; /* number of "insignificant" bits 16-bit gamma */ nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: float gamma; /* file gamma value */ nuclear@1: float screen_gamma; /* screen gamma value (display_exponent) */ nuclear@1: #endif nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) nuclear@1: png_bytep gamma_table; /* gamma table for 8-bit depth files */ nuclear@1: png_bytep gamma_from_1; /* converts from 1.0 to screen */ nuclear@1: png_bytep gamma_to_1; /* converts from file to 1.0 */ nuclear@1: png_uint_16pp gamma_16_table; /* gamma table for 16-bit depth files */ nuclear@1: png_uint_16pp gamma_16_from_1; /* converts from 1.0 to screen */ nuclear@1: png_uint_16pp gamma_16_to_1; /* converts from file to 1.0 */ nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED) nuclear@1: png_color_8 sig_bit; /* significant bits in each available channel */ nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) nuclear@1: png_color_8 shift; /* shift for significant bit tranformation */ nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \ nuclear@1: || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) nuclear@1: png_bytep trans; /* transparency values for paletted files */ nuclear@1: png_color_16 trans_values; /* transparency values for non-paletted files */ nuclear@1: #endif nuclear@1: nuclear@1: png_read_status_ptr read_row_fn; /* called after each row is decoded */ nuclear@1: png_write_status_ptr write_row_fn; /* called after each row is encoded */ nuclear@1: #ifdef PNG_PROGRESSIVE_READ_SUPPORTED nuclear@1: png_progressive_info_ptr info_fn; /* called after header data fully read */ nuclear@1: png_progressive_row_ptr row_fn; /* called after each prog. row is decoded */ nuclear@1: png_progressive_end_ptr end_fn; /* called after image is complete */ nuclear@1: png_bytep save_buffer_ptr; /* current location in save_buffer */ nuclear@1: png_bytep save_buffer; /* buffer for previously read data */ nuclear@1: png_bytep current_buffer_ptr; /* current location in current_buffer */ nuclear@1: png_bytep current_buffer; /* buffer for recently used data */ nuclear@1: png_uint_32 push_length; /* size of current input chunk */ nuclear@1: png_uint_32 skip_length; /* bytes to skip in input data */ nuclear@1: png_size_t save_buffer_size; /* amount of data now in save_buffer */ nuclear@1: png_size_t save_buffer_max; /* total size of save_buffer */ nuclear@1: png_size_t buffer_size; /* total amount of available input data */ nuclear@1: png_size_t current_buffer_size; /* amount of data now in current_buffer */ nuclear@1: int process_mode; /* what push library is currently doing */ nuclear@1: int cur_palette; /* current push library palette index */ nuclear@1: nuclear@1: # if defined(PNG_TEXT_SUPPORTED) nuclear@1: png_size_t current_text_size; /* current size of text input data */ nuclear@1: png_size_t current_text_left; /* how much text left to read in input */ nuclear@1: png_charp current_text; /* current text chunk buffer */ nuclear@1: png_charp current_text_ptr; /* current location in current_text */ nuclear@1: # endif /* PNG_TEXT_SUPPORTED */ nuclear@1: #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ nuclear@1: nuclear@1: #if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) nuclear@1: /* for the Borland special 64K segment handler */ nuclear@1: png_bytepp offset_table_ptr; nuclear@1: png_bytep offset_table; nuclear@1: png_uint_16 offset_table_number; nuclear@1: png_uint_16 offset_table_count; nuclear@1: png_uint_16 offset_table_count_free; nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_DITHER_SUPPORTED) nuclear@1: png_bytep palette_lookup; /* lookup table for dithering */ nuclear@1: png_bytep dither_index; /* index translation for palette files */ nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_DITHER_SUPPORTED) || defined(PNG_hIST_SUPPORTED) nuclear@1: png_uint_16p hist; /* histogram */ nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) nuclear@1: png_byte heuristic_method; /* heuristic for row filter selection */ nuclear@1: png_byte num_prev_filters; /* number of weights for previous rows */ nuclear@1: png_bytep prev_filters; /* filter type(s) of previous row(s) */ nuclear@1: png_uint_16p filter_weights; /* weight(s) for previous line(s) */ nuclear@1: png_uint_16p inv_filter_weights; /* 1/weight(s) for previous line(s) */ nuclear@1: png_uint_16p filter_costs; /* relative filter calculation cost */ nuclear@1: png_uint_16p inv_filter_costs; /* 1/relative filter calculation cost */ nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_TIME_RFC1123_SUPPORTED) nuclear@1: png_charp time_buffer; /* String to hold RFC 1123 time text */ nuclear@1: #endif nuclear@1: nuclear@1: /* New members added in libpng-1.0.6 */ nuclear@1: nuclear@1: #ifdef PNG_FREE_ME_SUPPORTED nuclear@1: png_uint_32 free_me; /* flags items libpng is responsible for freeing */ nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_USER_CHUNKS_SUPPORTED) nuclear@1: png_voidp user_chunk_ptr; nuclear@1: png_user_chunk_ptr read_user_chunk_fn; /* user read chunk handler */ nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) nuclear@1: int num_chunk_list; nuclear@1: png_bytep chunk_list; nuclear@1: #endif nuclear@1: nuclear@1: /* New members added in libpng-1.0.3 */ nuclear@1: #if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) nuclear@1: png_byte rgb_to_gray_status; nuclear@1: /* These were changed from png_byte in libpng-1.0.6 */ nuclear@1: png_uint_16 rgb_to_gray_red_coeff; nuclear@1: png_uint_16 rgb_to_gray_green_coeff; nuclear@1: png_uint_16 rgb_to_gray_blue_coeff; nuclear@1: #endif nuclear@1: nuclear@1: /* New member added in libpng-1.0.4 (renamed in 1.0.9) */ nuclear@1: #if defined(PNG_MNG_FEATURES_SUPPORTED) || \ nuclear@1: defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ nuclear@1: defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) nuclear@1: /* changed from png_byte to png_uint_32 at version 1.2.0 */ nuclear@1: #ifdef PNG_1_0_X nuclear@1: png_byte mng_features_permitted; nuclear@1: #else nuclear@1: png_uint_32 mng_features_permitted; nuclear@1: #endif /* PNG_1_0_X */ nuclear@1: #endif nuclear@1: nuclear@1: /* New member added in libpng-1.0.7 */ nuclear@1: #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) nuclear@1: png_fixed_point int_gamma; nuclear@1: #endif nuclear@1: nuclear@1: /* New member added in libpng-1.0.9, ifdef'ed out in 1.0.12, enabled in 1.2.0 */ nuclear@1: #if defined(PNG_MNG_FEATURES_SUPPORTED) nuclear@1: png_byte filter_type; nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_1_0_X) nuclear@1: /* New member added in libpng-1.0.10, ifdef'ed out in 1.2.0 */ nuclear@1: png_uint_32 row_buf_size; nuclear@1: #endif nuclear@1: nuclear@1: /* New members added in libpng-1.2.0 */ nuclear@1: #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) nuclear@1: # if !defined(PNG_1_0_X) nuclear@1: # if defined(PNG_MMX_CODE_SUPPORTED) nuclear@1: png_byte mmx_bitdepth_threshold; nuclear@1: png_uint_32 mmx_rowbytes_threshold; nuclear@1: # endif nuclear@1: png_uint_32 asm_flags; nuclear@1: # endif nuclear@1: #endif nuclear@1: nuclear@1: /* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */ nuclear@1: #ifdef PNG_USER_MEM_SUPPORTED nuclear@1: png_voidp mem_ptr; /* user supplied struct for mem functions */ nuclear@1: png_malloc_ptr malloc_fn; /* function for allocating memory */ nuclear@1: png_free_ptr free_fn; /* function for freeing memory */ nuclear@1: #endif nuclear@1: nuclear@1: /* New member added in libpng-1.0.13 and 1.2.0 */ nuclear@1: png_bytep big_row_buf; /* buffer to save current (unfiltered) row */ nuclear@1: nuclear@1: #if defined(PNG_READ_DITHER_SUPPORTED) nuclear@1: /* The following three members were added at version 1.0.14 and 1.2.4 */ nuclear@1: png_bytep dither_sort; /* working sort array */ nuclear@1: png_bytep index_to_palette; /* where the original index currently is */ nuclear@1: /* in the palette */ nuclear@1: png_bytep palette_to_index; /* which original index points to this */ nuclear@1: /* palette color */ nuclear@1: #endif nuclear@1: nuclear@1: /* New members added in libpng-1.0.16 and 1.2.6 */ nuclear@1: png_byte compression_type; nuclear@1: nuclear@1: #ifdef PNG_SET_USER_LIMITS_SUPPORTED nuclear@1: png_uint_32 user_width_max; nuclear@1: png_uint_32 user_height_max; nuclear@1: #endif nuclear@1: nuclear@1: /* New member added in libpng-1.0.25 and 1.2.17 */ nuclear@1: #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) nuclear@1: /* storage for unknown chunk that the library doesn't recognize. */ nuclear@1: png_unknown_chunk unknown_chunk; nuclear@1: #endif nuclear@1: nuclear@1: /* New members added in libpng-1.2.26 */ nuclear@1: png_uint_32 old_big_row_buf_size, old_prev_row_size; nuclear@1: nuclear@1: /* New member added in libpng-1.2.30 */ nuclear@1: png_charp chunkdata; /* buffer for reading chunk data */ nuclear@1: nuclear@1: }; nuclear@1: nuclear@1: nuclear@1: /* This triggers a compiler error in png.c, if png.c and png.h nuclear@1: * do not agree upon the version number. nuclear@1: */ nuclear@1: typedef png_structp version_1_2_33; nuclear@1: nuclear@1: typedef png_struct FAR * FAR * png_structpp; nuclear@1: nuclear@1: /* Here are the function definitions most commonly used. This is not nuclear@1: * the place to find out how to use libpng. See libpng.txt for the nuclear@1: * full explanation, see example.c for the summary. This just provides nuclear@1: * a simple one line description of the use of each function. nuclear@1: */ nuclear@1: nuclear@1: /* Returns the version number of the library */ nuclear@1: extern PNG_EXPORT(png_uint_32,png_access_version_number) PNGARG((void)); nuclear@1: nuclear@1: /* Tell lib we have already handled the first magic bytes. nuclear@1: * Handling more than 8 bytes from the beginning of the file is an error. nuclear@1: */ nuclear@1: extern PNG_EXPORT(void,png_set_sig_bytes) PNGARG((png_structp png_ptr, nuclear@1: int num_bytes)); nuclear@1: nuclear@1: /* Check sig[start] through sig[start + num_to_check - 1] to see if it's a nuclear@1: * PNG file. Returns zero if the supplied bytes match the 8-byte PNG nuclear@1: * signature, and non-zero otherwise. Having num_to_check == 0 or nuclear@1: * start > 7 will always fail (ie return non-zero). nuclear@1: */ nuclear@1: extern PNG_EXPORT(int,png_sig_cmp) PNGARG((png_bytep sig, png_size_t start, nuclear@1: png_size_t num_to_check)); nuclear@1: nuclear@1: /* Simple signature checking function. This is the same as calling nuclear@1: * png_check_sig(sig, n) := !png_sig_cmp(sig, 0, n). nuclear@1: */ nuclear@1: extern PNG_EXPORT(int,png_check_sig) PNGARG((png_bytep sig, int num)); nuclear@1: nuclear@1: /* Allocate and initialize png_ptr struct for reading, and any other memory. */ nuclear@1: extern PNG_EXPORT(png_structp,png_create_read_struct) nuclear@1: PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, nuclear@1: png_error_ptr error_fn, png_error_ptr warn_fn)); nuclear@1: nuclear@1: /* Allocate and initialize png_ptr struct for writing, and any other memory */ nuclear@1: extern PNG_EXPORT(png_structp,png_create_write_struct) nuclear@1: PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, nuclear@1: png_error_ptr error_fn, png_error_ptr warn_fn)); nuclear@1: nuclear@1: #ifdef PNG_WRITE_SUPPORTED nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_compression_buffer_size) nuclear@1: PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #ifdef PNG_WRITE_SUPPORTED nuclear@1: extern PNG_EXPORT(void,png_set_compression_buffer_size) nuclear@1: PNGARG((png_structp png_ptr, png_uint_32 size)); nuclear@1: #endif nuclear@1: nuclear@1: /* Reset the compression stream */ nuclear@1: extern PNG_EXPORT(int,png_reset_zstream) PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* New functions added in libpng-1.0.2 (not enabled by default until 1.2.0) */ nuclear@1: #ifdef PNG_USER_MEM_SUPPORTED nuclear@1: extern PNG_EXPORT(png_structp,png_create_read_struct_2) nuclear@1: PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, nuclear@1: png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, nuclear@1: png_malloc_ptr malloc_fn, png_free_ptr free_fn)); nuclear@1: extern PNG_EXPORT(png_structp,png_create_write_struct_2) nuclear@1: PNGARG((png_const_charp user_png_ver, png_voidp error_ptr, nuclear@1: png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, nuclear@1: png_malloc_ptr malloc_fn, png_free_ptr free_fn)); nuclear@1: #endif nuclear@1: nuclear@1: /* Write a PNG chunk - size, type, (optional) data, CRC. */ nuclear@1: extern PNG_EXPORT(void,png_write_chunk) PNGARG((png_structp png_ptr, nuclear@1: png_bytep chunk_name, png_bytep data, png_size_t length)); nuclear@1: nuclear@1: /* Write the start of a PNG chunk - length and chunk name. */ nuclear@1: extern PNG_EXPORT(void,png_write_chunk_start) PNGARG((png_structp png_ptr, nuclear@1: png_bytep chunk_name, png_uint_32 length)); nuclear@1: nuclear@1: /* Write the data of a PNG chunk started with png_write_chunk_start(). */ nuclear@1: extern PNG_EXPORT(void,png_write_chunk_data) PNGARG((png_structp png_ptr, nuclear@1: png_bytep data, png_size_t length)); nuclear@1: nuclear@1: /* Finish a chunk started with png_write_chunk_start() (includes CRC). */ nuclear@1: extern PNG_EXPORT(void,png_write_chunk_end) PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* Allocate and initialize the info structure */ nuclear@1: extern PNG_EXPORT(png_infop,png_create_info_struct) nuclear@1: PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: #if defined(PNG_1_0_X) || defined (PNG_1_2_X) nuclear@1: /* Initialize the info structure (old interface - DEPRECATED) */ nuclear@1: extern PNG_EXPORT(void,png_info_init) PNGARG((png_infop info_ptr)); nuclear@1: #undef png_info_init nuclear@1: #define png_info_init(info_ptr) png_info_init_3(&info_ptr,\ nuclear@1: png_sizeof(png_info)); nuclear@1: #endif nuclear@1: nuclear@1: extern PNG_EXPORT(void,png_info_init_3) PNGARG((png_infopp info_ptr, nuclear@1: png_size_t png_info_struct_size)); nuclear@1: nuclear@1: /* Writes all the PNG information before the image. */ nuclear@1: extern PNG_EXPORT(void,png_write_info_before_PLTE) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: extern PNG_EXPORT(void,png_write_info) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: nuclear@1: #ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED nuclear@1: /* read the information before the actual image data. */ nuclear@1: extern PNG_EXPORT(void,png_read_info) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_TIME_RFC1123_SUPPORTED) nuclear@1: extern PNG_EXPORT(png_charp,png_convert_to_rfc1123) nuclear@1: PNGARG((png_structp png_ptr, png_timep ptime)); nuclear@1: #endif nuclear@1: nuclear@1: #if !defined(_WIN32_WCE) nuclear@1: /* "time.h" functions are not supported on WindowsCE */ nuclear@1: #if defined(PNG_WRITE_tIME_SUPPORTED) nuclear@1: /* convert from a struct tm to png_time */ nuclear@1: extern PNG_EXPORT(void,png_convert_from_struct_tm) PNGARG((png_timep ptime, nuclear@1: struct tm FAR * ttime)); nuclear@1: nuclear@1: /* convert from time_t to png_time. Uses gmtime() */ nuclear@1: extern PNG_EXPORT(void,png_convert_from_time_t) PNGARG((png_timep ptime, nuclear@1: time_t ttime)); nuclear@1: #endif /* PNG_WRITE_tIME_SUPPORTED */ nuclear@1: #endif /* _WIN32_WCE */ nuclear@1: nuclear@1: #if defined(PNG_READ_EXPAND_SUPPORTED) nuclear@1: /* Expand data to 24-bit RGB, or 8-bit grayscale, with alpha if available. */ nuclear@1: extern PNG_EXPORT(void,png_set_expand) PNGARG((png_structp png_ptr)); nuclear@1: #if !defined(PNG_1_0_X) nuclear@1: extern PNG_EXPORT(void,png_set_expand_gray_1_2_4_to_8) PNGARG((png_structp nuclear@1: png_ptr)); nuclear@1: #endif nuclear@1: extern PNG_EXPORT(void,png_set_palette_to_rgb) PNGARG((png_structp png_ptr)); nuclear@1: extern PNG_EXPORT(void,png_set_tRNS_to_alpha) PNGARG((png_structp png_ptr)); nuclear@1: #if defined(PNG_1_0_X) || defined (PNG_1_2_X) nuclear@1: /* Deprecated */ nuclear@1: extern PNG_EXPORT(void,png_set_gray_1_2_4_to_8) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) nuclear@1: /* Use blue, green, red order for pixels. */ nuclear@1: extern PNG_EXPORT(void,png_set_bgr) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) nuclear@1: /* Expand the grayscale to 24-bit RGB if necessary. */ nuclear@1: extern PNG_EXPORT(void,png_set_gray_to_rgb) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) nuclear@1: /* Reduce RGB to grayscale. */ nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(void,png_set_rgb_to_gray) PNGARG((png_structp png_ptr, nuclear@1: int error_action, double red, double green )); nuclear@1: #endif nuclear@1: extern PNG_EXPORT(void,png_set_rgb_to_gray_fixed) PNGARG((png_structp png_ptr, nuclear@1: int error_action, png_fixed_point red, png_fixed_point green )); nuclear@1: extern PNG_EXPORT(png_byte,png_get_rgb_to_gray_status) PNGARG((png_structp nuclear@1: png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: extern PNG_EXPORT(void,png_build_grayscale_palette) PNGARG((int bit_depth, nuclear@1: png_colorp palette)); nuclear@1: nuclear@1: #if defined(PNG_READ_STRIP_ALPHA_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_strip_alpha) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \ nuclear@1: defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_swap_alpha) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \ nuclear@1: defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_invert_alpha) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED) nuclear@1: /* Add a filler byte to 8-bit Gray or 24-bit RGB images. */ nuclear@1: extern PNG_EXPORT(void,png_set_filler) PNGARG((png_structp png_ptr, nuclear@1: png_uint_32 filler, int flags)); nuclear@1: /* The values of the PNG_FILLER_ defines should NOT be changed */ nuclear@1: #define PNG_FILLER_BEFORE 0 nuclear@1: #define PNG_FILLER_AFTER 1 nuclear@1: /* Add an alpha byte to 8-bit Gray or 24-bit RGB images. */ nuclear@1: #if !defined(PNG_1_0_X) nuclear@1: extern PNG_EXPORT(void,png_set_add_alpha) PNGARG((png_structp png_ptr, nuclear@1: png_uint_32 filler, int flags)); nuclear@1: #endif nuclear@1: #endif /* PNG_READ_FILLER_SUPPORTED || PNG_WRITE_FILLER_SUPPORTED */ nuclear@1: nuclear@1: #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) nuclear@1: /* Swap bytes in 16-bit depth files. */ nuclear@1: extern PNG_EXPORT(void,png_set_swap) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED) nuclear@1: /* Use 1 byte per pixel in 1, 2, or 4-bit depth files. */ nuclear@1: extern PNG_EXPORT(void,png_set_packing) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED) nuclear@1: /* Swap packing order of pixels in bytes. */ nuclear@1: extern PNG_EXPORT(void,png_set_packswap) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED) nuclear@1: /* Converts files to legal bit depths. */ nuclear@1: extern PNG_EXPORT(void,png_set_shift) PNGARG((png_structp png_ptr, nuclear@1: png_color_8p true_bits)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_INTERLACING_SUPPORTED) || \ nuclear@1: defined(PNG_WRITE_INTERLACING_SUPPORTED) nuclear@1: /* Have the code handle the interlacing. Returns the number of passes. */ nuclear@1: extern PNG_EXPORT(int,png_set_interlace_handling) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) nuclear@1: /* Invert monochrome files */ nuclear@1: extern PNG_EXPORT(void,png_set_invert_mono) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_BACKGROUND_SUPPORTED) nuclear@1: /* Handle alpha and tRNS by replacing with a background color. */ nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(void,png_set_background) PNGARG((png_structp png_ptr, nuclear@1: png_color_16p background_color, int background_gamma_code, nuclear@1: int need_expand, double background_gamma)); nuclear@1: #endif nuclear@1: #define PNG_BACKGROUND_GAMMA_UNKNOWN 0 nuclear@1: #define PNG_BACKGROUND_GAMMA_SCREEN 1 nuclear@1: #define PNG_BACKGROUND_GAMMA_FILE 2 nuclear@1: #define PNG_BACKGROUND_GAMMA_UNIQUE 3 nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_16_TO_8_SUPPORTED) nuclear@1: /* strip the second byte of information from a 16-bit depth file. */ nuclear@1: extern PNG_EXPORT(void,png_set_strip_16) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_DITHER_SUPPORTED) nuclear@1: /* Turn on dithering, and reduce the palette to the number of colors available. */ nuclear@1: extern PNG_EXPORT(void,png_set_dither) PNGARG((png_structp png_ptr, nuclear@1: png_colorp palette, int num_palette, int maximum_colors, nuclear@1: png_uint_16p histogram, int full_dither)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_GAMMA_SUPPORTED) nuclear@1: /* Handle gamma correction. Screen_gamma=(display_exponent) */ nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(void,png_set_gamma) PNGARG((png_structp png_ptr, nuclear@1: double screen_gamma, double default_file_gamma)); nuclear@1: #endif nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_1_0_X) || defined (PNG_1_2_X) nuclear@1: #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ nuclear@1: defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) nuclear@1: /* Permit or disallow empty PLTE (0: not permitted, 1: permitted) */ nuclear@1: /* Deprecated and will be removed. Use png_permit_mng_features() instead. */ nuclear@1: extern PNG_EXPORT(void,png_permit_empty_plte) PNGARG((png_structp png_ptr, nuclear@1: int empty_plte_permitted)); nuclear@1: #endif nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_FLUSH_SUPPORTED) nuclear@1: /* Set how many lines between output flushes - 0 for no flushing */ nuclear@1: extern PNG_EXPORT(void,png_set_flush) PNGARG((png_structp png_ptr, int nrows)); nuclear@1: /* Flush the current PNG output buffer */ nuclear@1: extern PNG_EXPORT(void,png_write_flush) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: /* optional update palette with requested transformations */ nuclear@1: extern PNG_EXPORT(void,png_start_read_image) PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* optional call to update the users info structure */ nuclear@1: extern PNG_EXPORT(void,png_read_update_info) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: nuclear@1: #ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED nuclear@1: /* read one or more rows of image data. */ nuclear@1: extern PNG_EXPORT(void,png_read_rows) PNGARG((png_structp png_ptr, nuclear@1: png_bytepp row, png_bytepp display_row, png_uint_32 num_rows)); nuclear@1: #endif nuclear@1: nuclear@1: #ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED nuclear@1: /* read a row of data. */ nuclear@1: extern PNG_EXPORT(void,png_read_row) PNGARG((png_structp png_ptr, nuclear@1: png_bytep row, nuclear@1: png_bytep display_row)); nuclear@1: #endif nuclear@1: nuclear@1: #ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED nuclear@1: /* read the whole image into memory at once. */ nuclear@1: extern PNG_EXPORT(void,png_read_image) PNGARG((png_structp png_ptr, nuclear@1: png_bytepp image)); nuclear@1: #endif nuclear@1: nuclear@1: /* write a row of image data */ nuclear@1: extern PNG_EXPORT(void,png_write_row) PNGARG((png_structp png_ptr, nuclear@1: png_bytep row)); nuclear@1: nuclear@1: /* write a few rows of image data */ nuclear@1: extern PNG_EXPORT(void,png_write_rows) PNGARG((png_structp png_ptr, nuclear@1: png_bytepp row, png_uint_32 num_rows)); nuclear@1: nuclear@1: /* write the image data */ nuclear@1: extern PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr, nuclear@1: png_bytepp image)); nuclear@1: nuclear@1: /* writes the end of the PNG file. */ nuclear@1: extern PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: nuclear@1: #ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED nuclear@1: /* read the end of the PNG file. */ nuclear@1: extern PNG_EXPORT(void,png_read_end) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: /* free any memory associated with the png_info_struct */ nuclear@1: extern PNG_EXPORT(void,png_destroy_info_struct) PNGARG((png_structp png_ptr, nuclear@1: png_infopp info_ptr_ptr)); nuclear@1: nuclear@1: /* free any memory associated with the png_struct and the png_info_structs */ nuclear@1: extern PNG_EXPORT(void,png_destroy_read_struct) PNGARG((png_structpp nuclear@1: png_ptr_ptr, png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr)); nuclear@1: nuclear@1: /* free all memory used by the read (old method - NOT DLL EXPORTED) */ nuclear@1: extern void png_read_destroy PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_infop end_info_ptr)); nuclear@1: nuclear@1: /* free any memory associated with the png_struct and the png_info_structs */ nuclear@1: extern PNG_EXPORT(void,png_destroy_write_struct) nuclear@1: PNGARG((png_structpp png_ptr_ptr, png_infopp info_ptr_ptr)); nuclear@1: nuclear@1: /* free any memory used in png_ptr struct (old method - NOT DLL EXPORTED) */ nuclear@1: extern void png_write_destroy PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* set the libpng method of handling chunk CRC errors */ nuclear@1: extern PNG_EXPORT(void,png_set_crc_action) PNGARG((png_structp png_ptr, nuclear@1: int crit_action, int ancil_action)); nuclear@1: nuclear@1: /* Values for png_set_crc_action() to say how to handle CRC errors in nuclear@1: * ancillary and critical chunks, and whether to use the data contained nuclear@1: * therein. Note that it is impossible to "discard" data in a critical nuclear@1: * chunk. For versions prior to 0.90, the action was always error/quit, nuclear@1: * whereas in version 0.90 and later, the action for CRC errors in ancillary nuclear@1: * chunks is warn/discard. These values should NOT be changed. nuclear@1: * nuclear@1: * value action:critical action:ancillary nuclear@1: */ nuclear@1: #define PNG_CRC_DEFAULT 0 /* error/quit warn/discard data */ nuclear@1: #define PNG_CRC_ERROR_QUIT 1 /* error/quit error/quit */ nuclear@1: #define PNG_CRC_WARN_DISCARD 2 /* (INVALID) warn/discard data */ nuclear@1: #define PNG_CRC_WARN_USE 3 /* warn/use data warn/use data */ nuclear@1: #define PNG_CRC_QUIET_USE 4 /* quiet/use data quiet/use data */ nuclear@1: #define PNG_CRC_NO_CHANGE 5 /* use current value use current value */ nuclear@1: nuclear@1: /* These functions give the user control over the scan-line filtering in nuclear@1: * libpng and the compression methods used by zlib. These functions are nuclear@1: * mainly useful for testing, as the defaults should work with most users. nuclear@1: * Those users who are tight on memory or want faster performance at the nuclear@1: * expense of compression can modify them. See the compression library nuclear@1: * header file (zlib.h) for an explination of the compression functions. nuclear@1: */ nuclear@1: nuclear@1: /* set the filtering method(s) used by libpng. Currently, the only valid nuclear@1: * value for "method" is 0. nuclear@1: */ nuclear@1: extern PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method, nuclear@1: int filters)); nuclear@1: nuclear@1: /* Flags for png_set_filter() to say which filters to use. The flags nuclear@1: * are chosen so that they don't conflict with real filter types nuclear@1: * below, in case they are supplied instead of the #defined constants. nuclear@1: * These values should NOT be changed. nuclear@1: */ nuclear@1: #define PNG_NO_FILTERS 0x00 nuclear@1: #define PNG_FILTER_NONE 0x08 nuclear@1: #define PNG_FILTER_SUB 0x10 nuclear@1: #define PNG_FILTER_UP 0x20 nuclear@1: #define PNG_FILTER_AVG 0x40 nuclear@1: #define PNG_FILTER_PAETH 0x80 nuclear@1: #define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \ nuclear@1: PNG_FILTER_AVG | PNG_FILTER_PAETH) nuclear@1: nuclear@1: /* Filter values (not flags) - used in pngwrite.c, pngwutil.c for now. nuclear@1: * These defines should NOT be changed. nuclear@1: */ nuclear@1: #define PNG_FILTER_VALUE_NONE 0 nuclear@1: #define PNG_FILTER_VALUE_SUB 1 nuclear@1: #define PNG_FILTER_VALUE_UP 2 nuclear@1: #define PNG_FILTER_VALUE_AVG 3 nuclear@1: #define PNG_FILTER_VALUE_PAETH 4 nuclear@1: #define PNG_FILTER_VALUE_LAST 5 nuclear@1: nuclear@1: #if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) /* EXPERIMENTAL */ nuclear@1: /* The "heuristic_method" is given by one of the PNG_FILTER_HEURISTIC_ nuclear@1: * defines, either the default (minimum-sum-of-absolute-differences), or nuclear@1: * the experimental method (weighted-minimum-sum-of-absolute-differences). nuclear@1: * nuclear@1: * Weights are factors >= 1.0, indicating how important it is to keep the nuclear@1: * filter type consistent between rows. Larger numbers mean the current nuclear@1: * filter is that many times as likely to be the same as the "num_weights" nuclear@1: * previous filters. This is cumulative for each previous row with a weight. nuclear@1: * There needs to be "num_weights" values in "filter_weights", or it can be nuclear@1: * NULL if the weights aren't being specified. Weights have no influence on nuclear@1: * the selection of the first row filter. Well chosen weights can (in theory) nuclear@1: * improve the compression for a given image. nuclear@1: * nuclear@1: * Costs are factors >= 1.0 indicating the relative decoding costs of a nuclear@1: * filter type. Higher costs indicate more decoding expense, and are nuclear@1: * therefore less likely to be selected over a filter with lower computational nuclear@1: * costs. There needs to be a value in "filter_costs" for each valid filter nuclear@1: * type (given by PNG_FILTER_VALUE_LAST), or it can be NULL if you aren't nuclear@1: * setting the costs. Costs try to improve the speed of decompression without nuclear@1: * unduly increasing the compressed image size. nuclear@1: * nuclear@1: * A negative weight or cost indicates the default value is to be used, and nuclear@1: * values in the range [0.0, 1.0) indicate the value is to remain unchanged. nuclear@1: * The default values for both weights and costs are currently 1.0, but may nuclear@1: * change if good general weighting/cost heuristics can be found. If both nuclear@1: * the weights and costs are set to 1.0, this degenerates the WEIGHTED method nuclear@1: * to the UNWEIGHTED method, but with added encoding time/computation. nuclear@1: */ nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr, nuclear@1: int heuristic_method, int num_weights, png_doublep filter_weights, nuclear@1: png_doublep filter_costs)); nuclear@1: #endif nuclear@1: #endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ nuclear@1: nuclear@1: /* Heuristic used for row filter selection. These defines should NOT be nuclear@1: * changed. nuclear@1: */ nuclear@1: #define PNG_FILTER_HEURISTIC_DEFAULT 0 /* Currently "UNWEIGHTED" */ nuclear@1: #define PNG_FILTER_HEURISTIC_UNWEIGHTED 1 /* Used by libpng < 0.95 */ nuclear@1: #define PNG_FILTER_HEURISTIC_WEIGHTED 2 /* Experimental feature */ nuclear@1: #define PNG_FILTER_HEURISTIC_LAST 3 /* Not a valid value */ nuclear@1: nuclear@1: /* Set the library compression level. Currently, valid values range from nuclear@1: * 0 - 9, corresponding directly to the zlib compression levels 0 - 9 nuclear@1: * (0 - no compression, 9 - "maximal" compression). Note that tests have nuclear@1: * shown that zlib compression levels 3-6 usually perform as well as level 9 nuclear@1: * for PNG images, and do considerably fewer caclulations. In the future, nuclear@1: * these values may not correspond directly to the zlib compression levels. nuclear@1: */ nuclear@1: extern PNG_EXPORT(void,png_set_compression_level) PNGARG((png_structp png_ptr, nuclear@1: int level)); nuclear@1: nuclear@1: extern PNG_EXPORT(void,png_set_compression_mem_level) nuclear@1: PNGARG((png_structp png_ptr, int mem_level)); nuclear@1: nuclear@1: extern PNG_EXPORT(void,png_set_compression_strategy) nuclear@1: PNGARG((png_structp png_ptr, int strategy)); nuclear@1: nuclear@1: extern PNG_EXPORT(void,png_set_compression_window_bits) nuclear@1: PNGARG((png_structp png_ptr, int window_bits)); nuclear@1: nuclear@1: extern PNG_EXPORT(void,png_set_compression_method) PNGARG((png_structp png_ptr, nuclear@1: int method)); nuclear@1: nuclear@1: /* These next functions are called for input/output, memory, and error nuclear@1: * handling. They are in the file pngrio.c, pngwio.c, and pngerror.c, nuclear@1: * and call standard C I/O routines such as fread(), fwrite(), and nuclear@1: * fprintf(). These functions can be made to use other I/O routines nuclear@1: * at run time for those applications that need to handle I/O in a nuclear@1: * different manner by calling png_set_???_fn(). See libpng.txt for nuclear@1: * more information. nuclear@1: */ nuclear@1: nuclear@1: #if !defined(PNG_NO_STDIO) nuclear@1: /* Initialize the input/output for the PNG file to the default functions. */ nuclear@1: extern PNG_EXPORT(void,png_init_io) PNGARG((png_structp png_ptr, png_FILE_p fp)); nuclear@1: #endif nuclear@1: nuclear@1: /* Replace the (error and abort), and warning functions with user nuclear@1: * supplied functions. If no messages are to be printed you must still nuclear@1: * write and use replacement functions. The replacement error_fn should nuclear@1: * still do a longjmp to the last setjmp location if you are using this nuclear@1: * method of error handling. If error_fn or warning_fn is NULL, the nuclear@1: * default function will be used. nuclear@1: */ nuclear@1: nuclear@1: extern PNG_EXPORT(void,png_set_error_fn) PNGARG((png_structp png_ptr, nuclear@1: png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn)); nuclear@1: nuclear@1: /* Return the user pointer associated with the error functions */ nuclear@1: extern PNG_EXPORT(png_voidp,png_get_error_ptr) PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* Replace the default data output functions with a user supplied one(s). nuclear@1: * If buffered output is not used, then output_flush_fn can be set to NULL. nuclear@1: * If PNG_WRITE_FLUSH_SUPPORTED is not defined at libpng compile time nuclear@1: * output_flush_fn will be ignored (and thus can be NULL). nuclear@1: */ nuclear@1: extern PNG_EXPORT(void,png_set_write_fn) PNGARG((png_structp png_ptr, nuclear@1: png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn)); nuclear@1: nuclear@1: /* Replace the default data input function with a user supplied one. */ nuclear@1: extern PNG_EXPORT(void,png_set_read_fn) PNGARG((png_structp png_ptr, nuclear@1: png_voidp io_ptr, png_rw_ptr read_data_fn)); nuclear@1: nuclear@1: /* Return the user pointer associated with the I/O functions */ nuclear@1: extern PNG_EXPORT(png_voidp,png_get_io_ptr) PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: extern PNG_EXPORT(void,png_set_read_status_fn) PNGARG((png_structp png_ptr, nuclear@1: png_read_status_ptr read_row_fn)); nuclear@1: nuclear@1: extern PNG_EXPORT(void,png_set_write_status_fn) PNGARG((png_structp png_ptr, nuclear@1: png_write_status_ptr write_row_fn)); nuclear@1: nuclear@1: #ifdef PNG_USER_MEM_SUPPORTED nuclear@1: /* Replace the default memory allocation functions with user supplied one(s). */ nuclear@1: extern PNG_EXPORT(void,png_set_mem_fn) PNGARG((png_structp png_ptr, nuclear@1: png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn)); nuclear@1: /* Return the user pointer associated with the memory functions */ nuclear@1: extern PNG_EXPORT(png_voidp,png_get_mem_ptr) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ nuclear@1: defined(PNG_LEGACY_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_read_user_transform_fn) PNGARG((png_structp nuclear@1: png_ptr, png_user_transform_ptr read_user_transform_fn)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ nuclear@1: defined(PNG_LEGACY_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_write_user_transform_fn) PNGARG((png_structp nuclear@1: png_ptr, png_user_transform_ptr write_user_transform_fn)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ nuclear@1: defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ nuclear@1: defined(PNG_LEGACY_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_user_transform_info) PNGARG((png_structp nuclear@1: png_ptr, png_voidp user_transform_ptr, int user_transform_depth, nuclear@1: int user_transform_channels)); nuclear@1: /* Return the user pointer associated with the user transform functions */ nuclear@1: extern PNG_EXPORT(png_voidp,png_get_user_transform_ptr) nuclear@1: PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #ifdef PNG_USER_CHUNKS_SUPPORTED nuclear@1: extern PNG_EXPORT(void,png_set_read_user_chunk_fn) PNGARG((png_structp png_ptr, nuclear@1: png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn)); nuclear@1: extern PNG_EXPORT(png_voidp,png_get_user_chunk_ptr) PNGARG((png_structp nuclear@1: png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #ifdef PNG_PROGRESSIVE_READ_SUPPORTED nuclear@1: /* Sets the function callbacks for the push reader, and a pointer to a nuclear@1: * user-defined structure available to the callback functions. nuclear@1: */ nuclear@1: extern PNG_EXPORT(void,png_set_progressive_read_fn) PNGARG((png_structp png_ptr, nuclear@1: png_voidp progressive_ptr, nuclear@1: png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, nuclear@1: png_progressive_end_ptr end_fn)); nuclear@1: nuclear@1: /* returns the user pointer associated with the push read functions */ nuclear@1: extern PNG_EXPORT(png_voidp,png_get_progressive_ptr) nuclear@1: PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* function to be called when data becomes available */ nuclear@1: extern PNG_EXPORT(void,png_process_data) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_bytep buffer, png_size_t buffer_size)); nuclear@1: nuclear@1: /* function that combines rows. Not very much different than the nuclear@1: * png_combine_row() call. Is this even used????? nuclear@1: */ nuclear@1: extern PNG_EXPORT(void,png_progressive_combine_row) PNGARG((png_structp png_ptr, nuclear@1: png_bytep old_row, png_bytep new_row)); nuclear@1: #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ nuclear@1: nuclear@1: extern PNG_EXPORT(png_voidp,png_malloc) PNGARG((png_structp png_ptr, nuclear@1: png_uint_32 size)); nuclear@1: nuclear@1: #if defined(PNG_1_0_X) nuclear@1: # define png_malloc_warn png_malloc nuclear@1: #else nuclear@1: /* Added at libpng version 1.2.4 */ nuclear@1: extern PNG_EXPORT(png_voidp,png_malloc_warn) PNGARG((png_structp png_ptr, nuclear@1: png_uint_32 size)); nuclear@1: #endif nuclear@1: nuclear@1: /* frees a pointer allocated by png_malloc() */ nuclear@1: extern PNG_EXPORT(void,png_free) PNGARG((png_structp png_ptr, png_voidp ptr)); nuclear@1: nuclear@1: #if defined(PNG_1_0_X) nuclear@1: /* Function to allocate memory for zlib. */ nuclear@1: extern PNG_EXPORT(voidpf,png_zalloc) PNGARG((voidpf png_ptr, uInt items, nuclear@1: uInt size)); nuclear@1: nuclear@1: /* Function to free memory for zlib */ nuclear@1: extern PNG_EXPORT(void,png_zfree) PNGARG((voidpf png_ptr, voidpf ptr)); nuclear@1: #endif nuclear@1: nuclear@1: /* Free data that was allocated internally */ nuclear@1: extern PNG_EXPORT(void,png_free_data) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_32 free_me, int num)); nuclear@1: #ifdef PNG_FREE_ME_SUPPORTED nuclear@1: /* Reassign responsibility for freeing existing data, whether allocated nuclear@1: * by libpng or by the application */ nuclear@1: extern PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, int freer, png_uint_32 mask)); nuclear@1: #endif nuclear@1: /* assignments for png_data_freer */ nuclear@1: #define PNG_DESTROY_WILL_FREE_DATA 1 nuclear@1: #define PNG_SET_WILL_FREE_DATA 1 nuclear@1: #define PNG_USER_WILL_FREE_DATA 2 nuclear@1: /* Flags for png_ptr->free_me and info_ptr->free_me */ nuclear@1: #define PNG_FREE_HIST 0x0008 nuclear@1: #define PNG_FREE_ICCP 0x0010 nuclear@1: #define PNG_FREE_SPLT 0x0020 nuclear@1: #define PNG_FREE_ROWS 0x0040 nuclear@1: #define PNG_FREE_PCAL 0x0080 nuclear@1: #define PNG_FREE_SCAL 0x0100 nuclear@1: #define PNG_FREE_UNKN 0x0200 nuclear@1: #define PNG_FREE_LIST 0x0400 nuclear@1: #define PNG_FREE_PLTE 0x1000 nuclear@1: #define PNG_FREE_TRNS 0x2000 nuclear@1: #define PNG_FREE_TEXT 0x4000 nuclear@1: #define PNG_FREE_ALL 0x7fff nuclear@1: #define PNG_FREE_MUL 0x4220 /* PNG_FREE_SPLT|PNG_FREE_TEXT|PNG_FREE_UNKN */ nuclear@1: nuclear@1: #ifdef PNG_USER_MEM_SUPPORTED nuclear@1: extern PNG_EXPORT(png_voidp,png_malloc_default) PNGARG((png_structp png_ptr, nuclear@1: png_uint_32 size)); nuclear@1: extern PNG_EXPORT(void,png_free_default) PNGARG((png_structp png_ptr, nuclear@1: png_voidp ptr)); nuclear@1: #endif nuclear@1: nuclear@1: extern PNG_EXPORT(png_voidp,png_memcpy_check) PNGARG((png_structp png_ptr, nuclear@1: png_voidp s1, png_voidp s2, png_uint_32 size)); nuclear@1: nuclear@1: extern PNG_EXPORT(png_voidp,png_memset_check) PNGARG((png_structp png_ptr, nuclear@1: png_voidp s1, int value, png_uint_32 size)); nuclear@1: nuclear@1: #if defined(USE_FAR_KEYWORD) /* memory model conversion function */ nuclear@1: extern void *png_far_to_near PNGARG((png_structp png_ptr,png_voidp ptr, nuclear@1: int check)); nuclear@1: #endif /* USE_FAR_KEYWORD */ nuclear@1: nuclear@1: #ifndef PNG_NO_ERROR_TEXT nuclear@1: /* Fatal error in PNG image of libpng - can't continue */ nuclear@1: extern PNG_EXPORT(void,png_error) PNGARG((png_structp png_ptr, nuclear@1: png_const_charp error_message)); nuclear@1: nuclear@1: /* The same, but the chunk name is prepended to the error string. */ nuclear@1: extern PNG_EXPORT(void,png_chunk_error) PNGARG((png_structp png_ptr, nuclear@1: png_const_charp error_message)); nuclear@1: #else nuclear@1: /* Fatal error in PNG image of libpng - can't continue */ nuclear@1: extern PNG_EXPORT(void,png_err) PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #ifndef PNG_NO_WARNINGS nuclear@1: /* Non-fatal error in libpng. Can continue, but may have a problem. */ nuclear@1: extern PNG_EXPORT(void,png_warning) PNGARG((png_structp png_ptr, nuclear@1: png_const_charp warning_message)); nuclear@1: nuclear@1: #ifdef PNG_READ_SUPPORTED nuclear@1: /* Non-fatal error in libpng, chunk name is prepended to message. */ nuclear@1: extern PNG_EXPORT(void,png_chunk_warning) PNGARG((png_structp png_ptr, nuclear@1: png_const_charp warning_message)); nuclear@1: #endif /* PNG_READ_SUPPORTED */ nuclear@1: #endif /* PNG_NO_WARNINGS */ nuclear@1: nuclear@1: /* The png_set_ functions are for storing values in the png_info_struct. nuclear@1: * Similarly, the png_get_ calls are used to read values from the nuclear@1: * png_info_struct, either storing the parameters in the passed variables, or nuclear@1: * setting pointers into the png_info_struct where the data is stored. The nuclear@1: * png_get_ functions return a non-zero value if the data was available nuclear@1: * in info_ptr, or return zero and do not change any of the parameters if the nuclear@1: * data was not available. nuclear@1: * nuclear@1: * These functions should be used instead of directly accessing png_info nuclear@1: * to avoid problems with future changes in the size and internal layout of nuclear@1: * png_info_struct. nuclear@1: */ nuclear@1: /* Returns "flag" if chunk data is valid in info_ptr. */ nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_valid) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_32 flag)); nuclear@1: nuclear@1: /* Returns number of bytes needed to hold a transformed row. */ nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_rowbytes) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: nuclear@1: #if defined(PNG_INFO_IMAGE_SUPPORTED) nuclear@1: /* Returns row_pointers, which is an array of pointers to scanlines that was nuclear@1: returned from png_read_png(). */ nuclear@1: extern PNG_EXPORT(png_bytepp,png_get_rows) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: /* Set row_pointers, which is an array of pointers to scanlines for use nuclear@1: by png_write_png(). */ nuclear@1: extern PNG_EXPORT(void,png_set_rows) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_bytepp row_pointers)); nuclear@1: #endif nuclear@1: nuclear@1: /* Returns number of color channels in image. */ nuclear@1: extern PNG_EXPORT(png_byte,png_get_channels) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: nuclear@1: #ifdef PNG_EASY_ACCESS_SUPPORTED nuclear@1: /* Returns image width in pixels. */ nuclear@1: extern PNG_EXPORT(png_uint_32, png_get_image_width) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: nuclear@1: /* Returns image height in pixels. */ nuclear@1: extern PNG_EXPORT(png_uint_32, png_get_image_height) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: nuclear@1: /* Returns image bit_depth. */ nuclear@1: extern PNG_EXPORT(png_byte, png_get_bit_depth) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: nuclear@1: /* Returns image color_type. */ nuclear@1: extern PNG_EXPORT(png_byte, png_get_color_type) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: nuclear@1: /* Returns image filter_type. */ nuclear@1: extern PNG_EXPORT(png_byte, png_get_filter_type) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: nuclear@1: /* Returns image interlace_type. */ nuclear@1: extern PNG_EXPORT(png_byte, png_get_interlace_type) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: nuclear@1: /* Returns image compression_type. */ nuclear@1: extern PNG_EXPORT(png_byte, png_get_compression_type) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: nuclear@1: /* Returns image resolution in pixels per meter, from pHYs chunk data. */ nuclear@1: extern PNG_EXPORT(png_uint_32, png_get_pixels_per_meter) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: extern PNG_EXPORT(png_uint_32, png_get_x_pixels_per_meter) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: extern PNG_EXPORT(png_uint_32, png_get_y_pixels_per_meter) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: nuclear@1: /* Returns pixel aspect ratio, computed from pHYs chunk data. */ nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(float, png_get_pixel_aspect_ratio) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: /* Returns image x, y offset in pixels or microns, from oFFs chunk data. */ nuclear@1: extern PNG_EXPORT(png_int_32, png_get_x_offset_pixels) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: extern PNG_EXPORT(png_int_32, png_get_y_offset_pixels) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: extern PNG_EXPORT(png_int_32, png_get_x_offset_microns) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: extern PNG_EXPORT(png_int_32, png_get_y_offset_microns) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr)); nuclear@1: nuclear@1: #endif /* PNG_EASY_ACCESS_SUPPORTED */ nuclear@1: nuclear@1: /* Returns pointer to signature string read from PNG header */ nuclear@1: extern PNG_EXPORT(png_bytep,png_get_signature) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: nuclear@1: #if defined(PNG_bKGD_SUPPORTED) nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_bKGD) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_color_16p *background)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_bKGD_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_bKGD) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_color_16p background)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_cHRM_SUPPORTED) nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_cHRM) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, double *white_x, double *white_y, double *red_x, nuclear@1: double *red_y, double *green_x, double *green_y, double *blue_x, nuclear@1: double *blue_y)); nuclear@1: #endif nuclear@1: #ifdef PNG_FIXED_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_cHRM_fixed) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_fixed_point *int_white_x, png_fixed_point nuclear@1: *int_white_y, png_fixed_point *int_red_x, png_fixed_point *int_red_y, nuclear@1: png_fixed_point *int_green_x, png_fixed_point *int_green_y, png_fixed_point nuclear@1: *int_blue_x, png_fixed_point *int_blue_y)); nuclear@1: #endif nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_cHRM_SUPPORTED) nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(void,png_set_cHRM) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, double white_x, double white_y, double red_x, nuclear@1: double red_y, double green_x, double green_y, double blue_x, double blue_y)); nuclear@1: #endif nuclear@1: #ifdef PNG_FIXED_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(void,png_set_cHRM_fixed) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_fixed_point int_white_x, png_fixed_point int_white_y, nuclear@1: png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point nuclear@1: int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, nuclear@1: png_fixed_point int_blue_y)); nuclear@1: #endif nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_gAMA_SUPPORTED) nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_gAMA) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, double *file_gamma)); nuclear@1: #endif nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_gAMA_fixed) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_fixed_point *int_file_gamma)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_gAMA_SUPPORTED) nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(void,png_set_gAMA) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, double file_gamma)); nuclear@1: #endif nuclear@1: extern PNG_EXPORT(void,png_set_gAMA_fixed) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_fixed_point int_file_gamma)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_hIST_SUPPORTED) nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_hIST) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_16p *hist)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_hIST_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_hIST) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_16p hist)); nuclear@1: #endif nuclear@1: nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_IHDR) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_32 *width, png_uint_32 *height, nuclear@1: int *bit_depth, int *color_type, int *interlace_method, nuclear@1: int *compression_method, int *filter_method)); nuclear@1: nuclear@1: extern PNG_EXPORT(void,png_set_IHDR) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth, nuclear@1: int color_type, int interlace_method, int compression_method, nuclear@1: int filter_method)); nuclear@1: nuclear@1: #if defined(PNG_oFFs_SUPPORTED) nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_oFFs) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_int_32 *offset_x, png_int_32 *offset_y, nuclear@1: int *unit_type)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_oFFs_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_oFFs) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_int_32 offset_x, png_int_32 offset_y, nuclear@1: int unit_type)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_pCAL_SUPPORTED) nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_pCAL) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1, nuclear@1: int *type, int *nparams, png_charp *units, png_charpp *params)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_pCAL_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_pCAL) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1, nuclear@1: int type, int nparams, png_charp units, png_charpp params)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_pHYs_SUPPORTED) nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_pHYs_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_pHYs) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type)); nuclear@1: #endif nuclear@1: nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_PLTE) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_colorp *palette, int *num_palette)); nuclear@1: nuclear@1: extern PNG_EXPORT(void,png_set_PLTE) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_colorp palette, int num_palette)); nuclear@1: nuclear@1: #if defined(PNG_sBIT_SUPPORTED) nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_sBIT) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_color_8p *sig_bit)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_sBIT_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_sBIT) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_color_8p sig_bit)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_sRGB_SUPPORTED) nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_sRGB) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, int *intent)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_sRGB_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_sRGB) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, int intent)); nuclear@1: extern PNG_EXPORT(void,png_set_sRGB_gAMA_and_cHRM) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, int intent)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_iCCP_SUPPORTED) nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_iCCP) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_charpp name, int *compression_type, nuclear@1: png_charpp profile, png_uint_32 *proflen)); nuclear@1: /* Note to maintainer: profile should be png_bytepp */ nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_iCCP_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_iCCP) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_charp name, int compression_type, nuclear@1: png_charp profile, png_uint_32 proflen)); nuclear@1: /* Note to maintainer: profile should be png_bytep */ nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_sPLT_SUPPORTED) nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_sPLT) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_sPLT_tpp entries)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_sPLT_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_sPLT) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_sPLT_tp entries, int nentries)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_TEXT_SUPPORTED) nuclear@1: /* png_get_text also returns the number of text chunks in *num_text */ nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_textp *text_ptr, int *num_text)); nuclear@1: #endif nuclear@1: nuclear@1: /* nuclear@1: * Note while png_set_text() will accept a structure whose text, nuclear@1: * language, and translated keywords are NULL pointers, the structure nuclear@1: * returned by png_get_text will always contain regular nuclear@1: * zero-terminated C strings. They might be empty strings but nuclear@1: * they will never be NULL pointers. nuclear@1: */ nuclear@1: nuclear@1: #if defined(PNG_TEXT_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_text) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_textp text_ptr, int num_text)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_tIME_SUPPORTED) nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_tIME) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_timep *mod_time)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_tIME_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_tIME) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_timep mod_time)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_tRNS_SUPPORTED) nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_tRNS) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_bytep *trans, int *num_trans, nuclear@1: png_color_16p *trans_values)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_tRNS_SUPPORTED) nuclear@1: extern PNG_EXPORT(void,png_set_tRNS) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_bytep trans, int num_trans, nuclear@1: png_color_16p trans_values)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_tRNS_SUPPORTED) nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_sCAL_SUPPORTED) nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_sCAL) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, int *unit, double *width, double *height)); nuclear@1: #else nuclear@1: #ifdef PNG_FIXED_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_sCAL_s) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, int *unit, png_charpp swidth, png_charpp sheight)); nuclear@1: #endif nuclear@1: #endif nuclear@1: #endif /* PNG_sCAL_SUPPORTED */ nuclear@1: nuclear@1: #if defined(PNG_sCAL_SUPPORTED) nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(void,png_set_sCAL) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, int unit, double width, double height)); nuclear@1: #else nuclear@1: #ifdef PNG_FIXED_POINT_SUPPORTED nuclear@1: extern PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, int unit, png_charp swidth, png_charp sheight)); nuclear@1: #endif nuclear@1: #endif nuclear@1: #endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */ nuclear@1: nuclear@1: #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) nuclear@1: /* provide a list of chunks and how they are to be handled, if the built-in nuclear@1: handling or default unknown chunk handling is not desired. Any chunks not nuclear@1: listed will be handled in the default manner. The IHDR and IEND chunks nuclear@1: must not be listed. nuclear@1: keep = 0: follow default behaviour nuclear@1: = 1: do not keep nuclear@1: = 2: keep only if safe-to-copy nuclear@1: = 3: keep even if unsafe-to-copy nuclear@1: */ nuclear@1: extern PNG_EXPORT(void, png_set_keep_unknown_chunks) PNGARG((png_structp nuclear@1: png_ptr, int keep, png_bytep chunk_list, int num_chunks)); nuclear@1: extern PNG_EXPORT(void, png_set_unknown_chunks) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)); nuclear@1: extern PNG_EXPORT(void, png_set_unknown_chunk_location) nuclear@1: PNGARG((png_structp png_ptr, png_infop info_ptr, int chunk, int location)); nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp nuclear@1: png_ptr, png_infop info_ptr, png_unknown_chunkpp entries)); nuclear@1: #endif nuclear@1: #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED nuclear@1: PNG_EXPORT(int,png_handle_as_unknown) PNGARG((png_structp png_ptr, png_bytep nuclear@1: chunk_name)); nuclear@1: #endif nuclear@1: nuclear@1: /* Png_free_data() will turn off the "valid" flag for anything it frees. nuclear@1: If you need to turn it off for a chunk that your application has freed, nuclear@1: you can use png_set_invalid(png_ptr, info_ptr, PNG_INFO_CHNK); */ nuclear@1: extern PNG_EXPORT(void, png_set_invalid) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, int mask)); nuclear@1: nuclear@1: #if defined(PNG_INFO_IMAGE_SUPPORTED) nuclear@1: /* The "params" pointer is currently not used and is for future expansion. */ nuclear@1: extern PNG_EXPORT(void, png_read_png) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, nuclear@1: int transforms, nuclear@1: png_voidp params)); nuclear@1: extern PNG_EXPORT(void, png_write_png) PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, nuclear@1: int transforms, nuclear@1: png_voidp params)); nuclear@1: #endif nuclear@1: nuclear@1: /* Define PNG_DEBUG at compile time for debugging information. Higher nuclear@1: * numbers for PNG_DEBUG mean more debugging information. This has nuclear@1: * only been added since version 0.95 so it is not implemented throughout nuclear@1: * libpng yet, but more support will be added as needed. nuclear@1: */ nuclear@1: #ifdef PNG_DEBUG nuclear@1: #if (PNG_DEBUG > 0) nuclear@1: #if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER) nuclear@1: #include nuclear@1: #if (PNG_DEBUG > 1) nuclear@1: #define png_debug(l,m) _RPT0(_CRT_WARN,m) nuclear@1: #define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m,p1) nuclear@1: #define png_debug2(l,m,p1,p2) _RPT2(_CRT_WARN,m,p1,p2) nuclear@1: #endif nuclear@1: #else /* PNG_DEBUG_FILE || !_MSC_VER */ nuclear@1: #ifndef PNG_DEBUG_FILE nuclear@1: #define PNG_DEBUG_FILE stderr nuclear@1: #endif /* PNG_DEBUG_FILE */ nuclear@1: #if (PNG_DEBUG > 1) nuclear@1: #define png_debug(l,m) \ nuclear@1: { \ nuclear@1: int num_tabs=l; \ nuclear@1: fprintf(PNG_DEBUG_FILE,"%s"m,(num_tabs==1 ? "\t" : \ nuclear@1: (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \ nuclear@1: } nuclear@1: #define png_debug1(l,m,p1) \ nuclear@1: { \ nuclear@1: int num_tabs=l; \ nuclear@1: fprintf(PNG_DEBUG_FILE,"%s"m,(num_tabs==1 ? "\t" : \ nuclear@1: (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \ nuclear@1: } nuclear@1: #define png_debug2(l,m,p1,p2) \ nuclear@1: { \ nuclear@1: int num_tabs=l; \ nuclear@1: fprintf(PNG_DEBUG_FILE,"%s"m,(num_tabs==1 ? "\t" : \ nuclear@1: (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \ nuclear@1: } nuclear@1: #endif /* (PNG_DEBUG > 1) */ nuclear@1: #endif /* _MSC_VER */ nuclear@1: #endif /* (PNG_DEBUG > 0) */ nuclear@1: #endif /* PNG_DEBUG */ nuclear@1: #ifndef png_debug nuclear@1: #define png_debug(l, m) nuclear@1: #endif nuclear@1: #ifndef png_debug1 nuclear@1: #define png_debug1(l, m, p1) nuclear@1: #endif nuclear@1: #ifndef png_debug2 nuclear@1: #define png_debug2(l, m, p1, p2) nuclear@1: #endif nuclear@1: nuclear@1: extern PNG_EXPORT(png_charp,png_get_copyright) PNGARG((png_structp png_ptr)); nuclear@1: extern PNG_EXPORT(png_charp,png_get_header_ver) PNGARG((png_structp png_ptr)); nuclear@1: extern PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp png_ptr)); nuclear@1: extern PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: #ifdef PNG_MNG_FEATURES_SUPPORTED nuclear@1: extern PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp nuclear@1: png_ptr, png_uint_32 mng_features_permitted)); nuclear@1: #endif nuclear@1: nuclear@1: /* For use in png_set_keep_unknown, added to version 1.2.6 */ nuclear@1: #define PNG_HANDLE_CHUNK_AS_DEFAULT 0 nuclear@1: #define PNG_HANDLE_CHUNK_NEVER 1 nuclear@1: #define PNG_HANDLE_CHUNK_IF_SAFE 2 nuclear@1: #define PNG_HANDLE_CHUNK_ALWAYS 3 nuclear@1: nuclear@1: /* Added to version 1.2.0 */ nuclear@1: #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) nuclear@1: #if defined(PNG_MMX_CODE_SUPPORTED) nuclear@1: #define PNG_ASM_FLAG_MMX_SUPPORT_COMPILED 0x01 /* not user-settable */ nuclear@1: #define PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU 0x02 /* not user-settable */ nuclear@1: #define PNG_ASM_FLAG_MMX_READ_COMBINE_ROW 0x04 nuclear@1: #define PNG_ASM_FLAG_MMX_READ_INTERLACE 0x08 nuclear@1: #define PNG_ASM_FLAG_MMX_READ_FILTER_SUB 0x10 nuclear@1: #define PNG_ASM_FLAG_MMX_READ_FILTER_UP 0x20 nuclear@1: #define PNG_ASM_FLAG_MMX_READ_FILTER_AVG 0x40 nuclear@1: #define PNG_ASM_FLAG_MMX_READ_FILTER_PAETH 0x80 nuclear@1: #define PNG_ASM_FLAGS_INITIALIZED 0x80000000 /* not user-settable */ nuclear@1: nuclear@1: #define PNG_MMX_READ_FLAGS ( PNG_ASM_FLAG_MMX_READ_COMBINE_ROW \ nuclear@1: | PNG_ASM_FLAG_MMX_READ_INTERLACE \ nuclear@1: | PNG_ASM_FLAG_MMX_READ_FILTER_SUB \ nuclear@1: | PNG_ASM_FLAG_MMX_READ_FILTER_UP \ nuclear@1: | PNG_ASM_FLAG_MMX_READ_FILTER_AVG \ nuclear@1: | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ) nuclear@1: #define PNG_MMX_WRITE_FLAGS ( 0 ) nuclear@1: nuclear@1: #define PNG_MMX_FLAGS ( PNG_ASM_FLAG_MMX_SUPPORT_COMPILED \ nuclear@1: | PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU \ nuclear@1: | PNG_MMX_READ_FLAGS \ nuclear@1: | PNG_MMX_WRITE_FLAGS ) nuclear@1: nuclear@1: #define PNG_SELECT_READ 1 nuclear@1: #define PNG_SELECT_WRITE 2 nuclear@1: #endif /* PNG_MMX_CODE_SUPPORTED */ nuclear@1: nuclear@1: #if !defined(PNG_1_0_X) nuclear@1: /* pngget.c */ nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_mmx_flagmask) nuclear@1: PNGARG((int flag_select, int *compilerID)); nuclear@1: nuclear@1: /* pngget.c */ nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_asm_flagmask) nuclear@1: PNGARG((int flag_select)); nuclear@1: nuclear@1: /* pngget.c */ nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_asm_flags) nuclear@1: PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* pngget.c */ nuclear@1: extern PNG_EXPORT(png_byte,png_get_mmx_bitdepth_threshold) nuclear@1: PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* pngget.c */ nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_mmx_rowbytes_threshold) nuclear@1: PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* pngset.c */ nuclear@1: extern PNG_EXPORT(void,png_set_asm_flags) nuclear@1: PNGARG((png_structp png_ptr, png_uint_32 asm_flags)); nuclear@1: nuclear@1: /* pngset.c */ nuclear@1: extern PNG_EXPORT(void,png_set_mmx_thresholds) nuclear@1: PNGARG((png_structp png_ptr, png_byte mmx_bitdepth_threshold, nuclear@1: png_uint_32 mmx_rowbytes_threshold)); nuclear@1: nuclear@1: #endif /* PNG_1_0_X */ nuclear@1: nuclear@1: #if !defined(PNG_1_0_X) nuclear@1: /* png.c, pnggccrd.c, or pngvcrd.c */ nuclear@1: extern PNG_EXPORT(int,png_mmx_support) PNGARG((void)); nuclear@1: #endif /* PNG_ASSEMBLER_CODE_SUPPORTED */ nuclear@1: nuclear@1: /* Strip the prepended error numbers ("#nnn ") from error and warning nuclear@1: * messages before passing them to the error or warning handler. */ nuclear@1: #ifdef PNG_ERROR_NUMBERS_SUPPORTED nuclear@1: extern PNG_EXPORT(void,png_set_strip_error_numbers) PNGARG((png_structp nuclear@1: png_ptr, png_uint_32 strip_mode)); nuclear@1: #endif nuclear@1: nuclear@1: #endif /* PNG_1_0_X */ nuclear@1: nuclear@1: /* Added at libpng-1.2.6 */ nuclear@1: #ifdef PNG_SET_USER_LIMITS_SUPPORTED nuclear@1: extern PNG_EXPORT(void,png_set_user_limits) PNGARG((png_structp nuclear@1: png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max)); nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_user_width_max) PNGARG((png_structp nuclear@1: png_ptr)); nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp nuclear@1: png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: nuclear@1: /* Maintainer: Put new public prototypes here ^, in libpng.3, and project defs */ nuclear@1: nuclear@1: #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED nuclear@1: /* With these routines we avoid an integer divide, which will be slower on nuclear@1: * most machines. However, it does take more operations than the corresponding nuclear@1: * divide method, so it may be slower on a few RISC systems. There are two nuclear@1: * shifts (by 8 or 16 bits) and an addition, versus a single integer divide. nuclear@1: * nuclear@1: * Note that the rounding factors are NOT supposed to be the same! 128 and nuclear@1: * 32768 are correct for the NODIV code; 127 and 32767 are correct for the nuclear@1: * standard method. nuclear@1: * nuclear@1: * [Optimized code by Greg Roelofs and Mark Adler...blame us for bugs. :-) ] nuclear@1: */ nuclear@1: nuclear@1: /* fg and bg should be in `gamma 1.0' space; alpha is the opacity */ nuclear@1: nuclear@1: # define png_composite(composite, fg, alpha, bg) \ nuclear@1: { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) * (png_uint_16)(alpha) \ nuclear@1: + (png_uint_16)(bg)*(png_uint_16)(255 - \ nuclear@1: (png_uint_16)(alpha)) + (png_uint_16)128); \ nuclear@1: (composite) = (png_byte)((temp + (temp >> 8)) >> 8); } nuclear@1: nuclear@1: # define png_composite_16(composite, fg, alpha, bg) \ nuclear@1: { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) * (png_uint_32)(alpha) \ nuclear@1: + (png_uint_32)(bg)*(png_uint_32)(65535L - \ nuclear@1: (png_uint_32)(alpha)) + (png_uint_32)32768L); \ nuclear@1: (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); } nuclear@1: nuclear@1: #else /* standard method using integer division */ nuclear@1: nuclear@1: # define png_composite(composite, fg, alpha, bg) \ nuclear@1: (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \ nuclear@1: (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \ nuclear@1: (png_uint_16)127) / 255) nuclear@1: nuclear@1: # define png_composite_16(composite, fg, alpha, bg) \ nuclear@1: (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \ nuclear@1: (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \ nuclear@1: (png_uint_32)32767) / (png_uint_32)65535L) nuclear@1: nuclear@1: #endif /* PNG_READ_COMPOSITE_NODIV_SUPPORTED */ nuclear@1: nuclear@1: /* Inline macros to do direct reads of bytes from the input buffer. These nuclear@1: * require that you are using an architecture that uses PNG byte ordering nuclear@1: * (MSB first) and supports unaligned data storage. I think that PowerPC nuclear@1: * in big-endian mode and 680x0 are the only ones that will support this. nuclear@1: * The x86 line of processors definitely do not. The png_get_int_32() nuclear@1: * routine also assumes we are using two's complement format for negative nuclear@1: * values, which is almost certainly true. nuclear@1: */ nuclear@1: #if defined(PNG_READ_BIG_ENDIAN_SUPPORTED) nuclear@1: # define png_get_uint_32(buf) ( *((png_uint_32p) (buf))) nuclear@1: # define png_get_uint_16(buf) ( *((png_uint_16p) (buf))) nuclear@1: # define png_get_int_32(buf) ( *((png_int_32p) (buf))) nuclear@1: #else nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_uint_32) PNGARG((png_bytep buf)); nuclear@1: extern PNG_EXPORT(png_uint_16,png_get_uint_16) PNGARG((png_bytep buf)); nuclear@1: extern PNG_EXPORT(png_int_32,png_get_int_32) PNGARG((png_bytep buf)); nuclear@1: #endif /* !PNG_READ_BIG_ENDIAN_SUPPORTED */ nuclear@1: extern PNG_EXPORT(png_uint_32,png_get_uint_31) nuclear@1: PNGARG((png_structp png_ptr, png_bytep buf)); nuclear@1: /* No png_get_int_16 -- may be added if there's a real need for it. */ nuclear@1: nuclear@1: /* Place a 32-bit number into a buffer in PNG byte order (big-endian). nuclear@1: */ nuclear@1: extern PNG_EXPORT(void,png_save_uint_32) nuclear@1: PNGARG((png_bytep buf, png_uint_32 i)); nuclear@1: extern PNG_EXPORT(void,png_save_int_32) nuclear@1: PNGARG((png_bytep buf, png_int_32 i)); nuclear@1: nuclear@1: /* Place a 16-bit number into a buffer in PNG byte order. nuclear@1: * The parameter is declared unsigned int, not png_uint_16, nuclear@1: * just to avoid potential problems on pre-ANSI C compilers. nuclear@1: */ nuclear@1: extern PNG_EXPORT(void,png_save_uint_16) nuclear@1: PNGARG((png_bytep buf, unsigned int i)); nuclear@1: /* No png_save_int_16 -- may be added if there's a real need for it. */ nuclear@1: nuclear@1: /* ************************************************************************* */ nuclear@1: nuclear@1: /* These next functions are used internally in the code. They generally nuclear@1: * shouldn't be used unless you are writing code to add or replace some nuclear@1: * functionality in libpng. More information about most functions can nuclear@1: * be found in the files where the functions are located. nuclear@1: */ nuclear@1: nuclear@1: nuclear@1: /* Various modes of operation, that are visible to applications because nuclear@1: * they are used for unknown chunk location. nuclear@1: */ nuclear@1: #define PNG_HAVE_IHDR 0x01 nuclear@1: #define PNG_HAVE_PLTE 0x02 nuclear@1: #define PNG_HAVE_IDAT 0x04 nuclear@1: #define PNG_AFTER_IDAT 0x08 /* Have complete zlib datastream */ nuclear@1: #define PNG_HAVE_IEND 0x10 nuclear@1: nuclear@1: #if defined(PNG_INTERNAL) nuclear@1: nuclear@1: /* More modes of operation. Note that after an init, mode is set to nuclear@1: * zero automatically when the structure is created. nuclear@1: */ nuclear@1: #define PNG_HAVE_gAMA 0x20 nuclear@1: #define PNG_HAVE_cHRM 0x40 nuclear@1: #define PNG_HAVE_sRGB 0x80 nuclear@1: #define PNG_HAVE_CHUNK_HEADER 0x100 nuclear@1: #define PNG_WROTE_tIME 0x200 nuclear@1: #define PNG_WROTE_INFO_BEFORE_PLTE 0x400 nuclear@1: #define PNG_BACKGROUND_IS_GRAY 0x800 nuclear@1: #define PNG_HAVE_PNG_SIGNATURE 0x1000 nuclear@1: #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ nuclear@1: nuclear@1: /* flags for the transformations the PNG library does on the image data */ nuclear@1: #define PNG_BGR 0x0001 nuclear@1: #define PNG_INTERLACE 0x0002 nuclear@1: #define PNG_PACK 0x0004 nuclear@1: #define PNG_SHIFT 0x0008 nuclear@1: #define PNG_SWAP_BYTES 0x0010 nuclear@1: #define PNG_INVERT_MONO 0x0020 nuclear@1: #define PNG_DITHER 0x0040 nuclear@1: #define PNG_BACKGROUND 0x0080 nuclear@1: #define PNG_BACKGROUND_EXPAND 0x0100 nuclear@1: /* 0x0200 unused */ nuclear@1: #define PNG_16_TO_8 0x0400 nuclear@1: #define PNG_RGBA 0x0800 nuclear@1: #define PNG_EXPAND 0x1000 nuclear@1: #define PNG_GAMMA 0x2000 nuclear@1: #define PNG_GRAY_TO_RGB 0x4000 nuclear@1: #define PNG_FILLER 0x8000L nuclear@1: #define PNG_PACKSWAP 0x10000L nuclear@1: #define PNG_SWAP_ALPHA 0x20000L nuclear@1: #define PNG_STRIP_ALPHA 0x40000L nuclear@1: #define PNG_INVERT_ALPHA 0x80000L nuclear@1: #define PNG_USER_TRANSFORM 0x100000L nuclear@1: #define PNG_RGB_TO_GRAY_ERR 0x200000L nuclear@1: #define PNG_RGB_TO_GRAY_WARN 0x400000L nuclear@1: #define PNG_RGB_TO_GRAY 0x600000L /* two bits, RGB_TO_GRAY_ERR|WARN */ nuclear@1: /* 0x800000L Unused */ nuclear@1: #define PNG_ADD_ALPHA 0x1000000L /* Added to libpng-1.2.7 */ nuclear@1: #define PNG_EXPAND_tRNS 0x2000000L /* Added to libpng-1.2.9 */ nuclear@1: /* 0x4000000L unused */ nuclear@1: /* 0x8000000L unused */ nuclear@1: /* 0x10000000L unused */ nuclear@1: /* 0x20000000L unused */ nuclear@1: /* 0x40000000L unused */ nuclear@1: nuclear@1: /* flags for png_create_struct */ nuclear@1: #define PNG_STRUCT_PNG 0x0001 nuclear@1: #define PNG_STRUCT_INFO 0x0002 nuclear@1: nuclear@1: /* Scaling factor for filter heuristic weighting calculations */ nuclear@1: #define PNG_WEIGHT_SHIFT 8 nuclear@1: #define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT)) nuclear@1: #define PNG_COST_SHIFT 3 nuclear@1: #define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT)) nuclear@1: nuclear@1: /* flags for the png_ptr->flags rather than declaring a byte for each one */ nuclear@1: #define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001 nuclear@1: #define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002 nuclear@1: #define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004 nuclear@1: #define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008 nuclear@1: #define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010 nuclear@1: #define PNG_FLAG_ZLIB_FINISHED 0x0020 nuclear@1: #define PNG_FLAG_ROW_INIT 0x0040 nuclear@1: #define PNG_FLAG_FILLER_AFTER 0x0080 nuclear@1: #define PNG_FLAG_CRC_ANCILLARY_USE 0x0100 nuclear@1: #define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200 nuclear@1: #define PNG_FLAG_CRC_CRITICAL_USE 0x0400 nuclear@1: #define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800 nuclear@1: #define PNG_FLAG_FREE_PLTE 0x1000 nuclear@1: #define PNG_FLAG_FREE_TRNS 0x2000 nuclear@1: #define PNG_FLAG_FREE_HIST 0x4000 nuclear@1: #define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000L nuclear@1: #define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000L nuclear@1: #define PNG_FLAG_LIBRARY_MISMATCH 0x20000L nuclear@1: #define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000L nuclear@1: #define PNG_FLAG_STRIP_ERROR_TEXT 0x80000L nuclear@1: #define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000L nuclear@1: #define PNG_FLAG_ADD_ALPHA 0x200000L /* Added to libpng-1.2.8 */ nuclear@1: #define PNG_FLAG_STRIP_ALPHA 0x400000L /* Added to libpng-1.2.8 */ nuclear@1: /* 0x800000L unused */ nuclear@1: /* 0x1000000L unused */ nuclear@1: /* 0x2000000L unused */ nuclear@1: /* 0x4000000L unused */ nuclear@1: /* 0x8000000L unused */ nuclear@1: /* 0x10000000L unused */ nuclear@1: /* 0x20000000L unused */ nuclear@1: /* 0x40000000L unused */ nuclear@1: nuclear@1: #define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \ nuclear@1: PNG_FLAG_CRC_ANCILLARY_NOWARN) nuclear@1: nuclear@1: #define PNG_FLAG_CRC_CRITICAL_MASK (PNG_FLAG_CRC_CRITICAL_USE | \ nuclear@1: PNG_FLAG_CRC_CRITICAL_IGNORE) nuclear@1: nuclear@1: #define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \ nuclear@1: PNG_FLAG_CRC_CRITICAL_MASK) nuclear@1: nuclear@1: /* save typing and make code easier to understand */ nuclear@1: nuclear@1: #define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \ nuclear@1: abs((int)((c1).green) - (int)((c2).green)) + \ nuclear@1: abs((int)((c1).blue) - (int)((c2).blue))) nuclear@1: nuclear@1: /* Added to libpng-1.2.6 JB */ nuclear@1: #define PNG_ROWBYTES(pixel_bits, width) \ nuclear@1: ((pixel_bits) >= 8 ? \ nuclear@1: ((width) * (((png_uint_32)(pixel_bits)) >> 3)) : \ nuclear@1: (( ((width) * ((png_uint_32)(pixel_bits))) + 7) >> 3) ) nuclear@1: nuclear@1: /* PNG_OUT_OF_RANGE returns true if value is outside the range nuclear@1: ideal-delta..ideal+delta. Each argument is evaluated twice. nuclear@1: "ideal" and "delta" should be constants, normally simple nuclear@1: integers, "value" a variable. Added to libpng-1.2.6 JB */ nuclear@1: #define PNG_OUT_OF_RANGE(value, ideal, delta) \ nuclear@1: ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) ) nuclear@1: nuclear@1: /* variables declared in png.c - only it needs to define PNG_NO_EXTERN */ nuclear@1: #if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN) nuclear@1: /* place to hold the signature string for a PNG file. */ nuclear@1: #ifdef PNG_USE_GLOBAL_ARRAYS nuclear@1: PNG_EXPORT_VAR (PNG_CONST png_byte FARDATA) png_sig[8]; nuclear@1: #else nuclear@1: #endif nuclear@1: #endif /* PNG_NO_EXTERN */ nuclear@1: nuclear@1: /* Constant strings for known chunk types. If you need to add a chunk, nuclear@1: * define the name here, and add an invocation of the macro in png.c and nuclear@1: * wherever it's needed. nuclear@1: */ nuclear@1: #define PNG_IHDR png_byte png_IHDR[5] = { 73, 72, 68, 82, '\0'} nuclear@1: #define PNG_IDAT png_byte png_IDAT[5] = { 73, 68, 65, 84, '\0'} nuclear@1: #define PNG_IEND png_byte png_IEND[5] = { 73, 69, 78, 68, '\0'} nuclear@1: #define PNG_PLTE png_byte png_PLTE[5] = { 80, 76, 84, 69, '\0'} nuclear@1: #define PNG_bKGD png_byte png_bKGD[5] = { 98, 75, 71, 68, '\0'} nuclear@1: #define PNG_cHRM png_byte png_cHRM[5] = { 99, 72, 82, 77, '\0'} nuclear@1: #define PNG_gAMA png_byte png_gAMA[5] = {103, 65, 77, 65, '\0'} nuclear@1: #define PNG_hIST png_byte png_hIST[5] = {104, 73, 83, 84, '\0'} nuclear@1: #define PNG_iCCP png_byte png_iCCP[5] = {105, 67, 67, 80, '\0'} nuclear@1: #define PNG_iTXt png_byte png_iTXt[5] = {105, 84, 88, 116, '\0'} nuclear@1: #define PNG_oFFs png_byte png_oFFs[5] = {111, 70, 70, 115, '\0'} nuclear@1: #define PNG_pCAL png_byte png_pCAL[5] = {112, 67, 65, 76, '\0'} nuclear@1: #define PNG_sCAL png_byte png_sCAL[5] = {115, 67, 65, 76, '\0'} nuclear@1: #define PNG_pHYs png_byte png_pHYs[5] = {112, 72, 89, 115, '\0'} nuclear@1: #define PNG_sBIT png_byte png_sBIT[5] = {115, 66, 73, 84, '\0'} nuclear@1: #define PNG_sPLT png_byte png_sPLT[5] = {115, 80, 76, 84, '\0'} nuclear@1: #define PNG_sRGB png_byte png_sRGB[5] = {115, 82, 71, 66, '\0'} nuclear@1: #define PNG_tEXt png_byte png_tEXt[5] = {116, 69, 88, 116, '\0'} nuclear@1: #define PNG_tIME png_byte png_tIME[5] = {116, 73, 77, 69, '\0'} nuclear@1: #define PNG_tRNS png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'} nuclear@1: #define PNG_zTXt png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'} nuclear@1: nuclear@1: #ifdef PNG_USE_GLOBAL_ARRAYS nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_IHDR[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_IDAT[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_IEND[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_PLTE[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_bKGD[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_cHRM[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_gAMA[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_hIST[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_iCCP[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_iTXt[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_oFFs[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_pCAL[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_sCAL[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_pHYs[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_sBIT[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_sPLT[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_sRGB[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_tEXt[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_tIME[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_tRNS[5]; nuclear@1: PNG_EXPORT_VAR (png_byte FARDATA) png_zTXt[5]; nuclear@1: #endif /* PNG_USE_GLOBAL_ARRAYS */ nuclear@1: nuclear@1: #if defined(PNG_1_0_X) || defined (PNG_1_2_X) nuclear@1: /* Initialize png_ptr struct for reading, and allocate any other memory. nuclear@1: * (old interface - DEPRECATED - use png_create_read_struct instead). nuclear@1: */ nuclear@1: extern PNG_EXPORT(void,png_read_init) PNGARG((png_structp png_ptr)); nuclear@1: #undef png_read_init nuclear@1: #define png_read_init(png_ptr) png_read_init_3(&png_ptr, \ nuclear@1: PNG_LIBPNG_VER_STRING, png_sizeof(png_struct)); nuclear@1: #endif nuclear@1: nuclear@1: extern PNG_EXPORT(void,png_read_init_3) PNGARG((png_structpp ptr_ptr, nuclear@1: png_const_charp user_png_ver, png_size_t png_struct_size)); nuclear@1: #if defined(PNG_1_0_X) || defined (PNG_1_2_X) nuclear@1: extern PNG_EXPORT(void,png_read_init_2) PNGARG((png_structp png_ptr, nuclear@1: png_const_charp user_png_ver, png_size_t png_struct_size, png_size_t nuclear@1: png_info_size)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_1_0_X) || defined (PNG_1_2_X) nuclear@1: /* Initialize png_ptr struct for writing, and allocate any other memory. nuclear@1: * (old interface - DEPRECATED - use png_create_write_struct instead). nuclear@1: */ nuclear@1: extern PNG_EXPORT(void,png_write_init) PNGARG((png_structp png_ptr)); nuclear@1: #undef png_write_init nuclear@1: #define png_write_init(png_ptr) png_write_init_3(&png_ptr, \ nuclear@1: PNG_LIBPNG_VER_STRING, png_sizeof(png_struct)); nuclear@1: #endif nuclear@1: nuclear@1: extern PNG_EXPORT(void,png_write_init_3) PNGARG((png_structpp ptr_ptr, nuclear@1: png_const_charp user_png_ver, png_size_t png_struct_size)); nuclear@1: extern PNG_EXPORT(void,png_write_init_2) PNGARG((png_structp png_ptr, nuclear@1: png_const_charp user_png_ver, png_size_t png_struct_size, png_size_t nuclear@1: png_info_size)); nuclear@1: nuclear@1: /* Allocate memory for an internal libpng struct */ nuclear@1: PNG_EXTERN png_voidp png_create_struct PNGARG((int type)); nuclear@1: nuclear@1: /* Free memory from internal libpng struct */ nuclear@1: PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr)); nuclear@1: nuclear@1: PNG_EXTERN png_voidp png_create_struct_2 PNGARG((int type, png_malloc_ptr nuclear@1: malloc_fn, png_voidp mem_ptr)); nuclear@1: PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr, nuclear@1: png_free_ptr free_fn, png_voidp mem_ptr)); nuclear@1: nuclear@1: /* Free any memory that info_ptr points to and reset struct. */ nuclear@1: PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: nuclear@1: #ifndef PNG_1_0_X nuclear@1: /* Function to allocate memory for zlib. */ nuclear@1: PNG_EXTERN voidpf png_zalloc PNGARG((voidpf png_ptr, uInt items, uInt size)); nuclear@1: nuclear@1: /* Function to free memory for zlib */ nuclear@1: PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr)); nuclear@1: nuclear@1: #ifdef PNG_SIZE_T nuclear@1: /* Function to convert a sizeof an item to png_sizeof item */ nuclear@1: PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size)); nuclear@1: #endif nuclear@1: nuclear@1: /* Next four functions are used internally as callbacks. PNGAPI is required nuclear@1: * but not PNG_EXPORT. PNGAPI added at libpng version 1.2.3. */ nuclear@1: nuclear@1: PNG_EXTERN void PNGAPI png_default_read_data PNGARG((png_structp png_ptr, nuclear@1: png_bytep data, png_size_t length)); nuclear@1: nuclear@1: #ifdef PNG_PROGRESSIVE_READ_SUPPORTED nuclear@1: PNG_EXTERN void PNGAPI png_push_fill_buffer PNGARG((png_structp png_ptr, nuclear@1: png_bytep buffer, png_size_t length)); nuclear@1: #endif nuclear@1: nuclear@1: PNG_EXTERN void PNGAPI png_default_write_data PNGARG((png_structp png_ptr, nuclear@1: png_bytep data, png_size_t length)); nuclear@1: nuclear@1: #if defined(PNG_WRITE_FLUSH_SUPPORTED) nuclear@1: #if !defined(PNG_NO_STDIO) nuclear@1: PNG_EXTERN void PNGAPI png_default_flush PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: #endif nuclear@1: #else /* PNG_1_0_X */ nuclear@1: #ifdef PNG_PROGRESSIVE_READ_SUPPORTED nuclear@1: PNG_EXTERN void png_push_fill_buffer PNGARG((png_structp png_ptr, nuclear@1: png_bytep buffer, png_size_t length)); nuclear@1: #endif nuclear@1: #endif /* PNG_1_0_X */ nuclear@1: nuclear@1: /* Reset the CRC variable */ nuclear@1: PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* Write the "data" buffer to whatever output you are using. */ nuclear@1: PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, png_bytep data, nuclear@1: png_size_t length)); nuclear@1: nuclear@1: /* Read data from whatever input you are using into the "data" buffer */ nuclear@1: PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data, nuclear@1: png_size_t length)); nuclear@1: nuclear@1: /* Read bytes into buf, and update png_ptr->crc */ nuclear@1: PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf, nuclear@1: png_size_t length)); nuclear@1: nuclear@1: /* Decompress data in a chunk that uses compression */ nuclear@1: #if defined(PNG_zTXt_SUPPORTED) || defined(PNG_iTXt_SUPPORTED) || \ nuclear@1: defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) nuclear@1: PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr, nuclear@1: int comp_type, png_size_t chunklength, nuclear@1: png_size_t prefix_length, png_size_t *data_length)); nuclear@1: #endif nuclear@1: nuclear@1: /* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */ nuclear@1: PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip)); nuclear@1: nuclear@1: /* Read the CRC from the file and compare it to the libpng calculated CRC */ nuclear@1: PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* Calculate the CRC over a section of data. Note that we are only nuclear@1: * passing a maximum of 64K on systems that have this as a memory limit, nuclear@1: * since this is the maximum buffer size we can specify. nuclear@1: */ nuclear@1: PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, png_bytep ptr, nuclear@1: png_size_t length)); nuclear@1: nuclear@1: #if defined(PNG_WRITE_FLUSH_SUPPORTED) nuclear@1: PNG_EXTERN void png_flush PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: /* simple function to write the signature */ nuclear@1: PNG_EXTERN void png_write_sig PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* write various chunks */ nuclear@1: nuclear@1: /* Write the IHDR chunk, and update the png_struct with the necessary nuclear@1: * information. nuclear@1: */ nuclear@1: PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width, nuclear@1: png_uint_32 height, nuclear@1: int bit_depth, int color_type, int compression_method, int filter_method, nuclear@1: int interlace_method)); nuclear@1: nuclear@1: PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, png_colorp palette, nuclear@1: png_uint_32 num_pal)); nuclear@1: nuclear@1: PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data, nuclear@1: png_size_t length)); nuclear@1: nuclear@1: PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: #if defined(PNG_WRITE_gAMA_SUPPORTED) nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma)); nuclear@1: #endif nuclear@1: #ifdef PNG_FIXED_POINT_SUPPORTED nuclear@1: PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr, png_fixed_point nuclear@1: file_gamma)); nuclear@1: #endif nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_sBIT_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, png_color_8p sbit, nuclear@1: int color_type)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_cHRM_SUPPORTED) nuclear@1: #ifdef PNG_FLOATING_POINT_SUPPORTED nuclear@1: PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr, nuclear@1: double white_x, double white_y, nuclear@1: double red_x, double red_y, double green_x, double green_y, nuclear@1: double blue_x, double blue_y)); nuclear@1: #endif nuclear@1: #ifdef PNG_FIXED_POINT_SUPPORTED nuclear@1: PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr, nuclear@1: png_fixed_point int_white_x, png_fixed_point int_white_y, nuclear@1: png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point nuclear@1: int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x, nuclear@1: png_fixed_point int_blue_y)); nuclear@1: #endif nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_sRGB_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr, nuclear@1: int intent)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_iCCP_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr, nuclear@1: png_charp name, int compression_type, nuclear@1: png_charp profile, int proflen)); nuclear@1: /* Note to maintainer: profile should be png_bytep */ nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_sPLT_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr, nuclear@1: png_sPLT_tp palette)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_tRNS_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, png_bytep trans, nuclear@1: png_color_16p values, int number, int color_type)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_bKGD_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr, nuclear@1: png_color_16p values, int color_type)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_hIST_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, png_uint_16p hist, nuclear@1: int num_hist)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \ nuclear@1: defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) nuclear@1: PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr, nuclear@1: png_charp key, png_charpp new_key)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_tEXt_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_charp key, nuclear@1: png_charp text, png_size_t text_len)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_zTXt_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_charp key, nuclear@1: png_charp text, png_size_t text_len, int compression)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_iTXt_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr, nuclear@1: int compression, png_charp key, png_charp lang, png_charp lang_key, nuclear@1: png_charp text)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_TEXT_SUPPORTED) /* Added at version 1.0.14 and 1.2.4 */ nuclear@1: PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_textp text_ptr, int num_text)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_oFFs_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr, nuclear@1: png_int_32 x_offset, png_int_32 y_offset, int unit_type)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_pCAL_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose, nuclear@1: png_int_32 X0, png_int_32 X1, int type, int nparams, nuclear@1: png_charp units, png_charpp params)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_pHYs_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr, nuclear@1: png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit, nuclear@1: int unit_type)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_tIME_SUPPORTED) nuclear@1: PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr, nuclear@1: png_timep mod_time)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_sCAL_SUPPORTED) nuclear@1: #if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO) nuclear@1: PNG_EXTERN void png_write_sCAL PNGARG((png_structp png_ptr, nuclear@1: int unit, double width, double height)); nuclear@1: #else nuclear@1: #ifdef PNG_FIXED_POINT_SUPPORTED nuclear@1: PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr, nuclear@1: int unit, png_charp width, png_charp height)); nuclear@1: #endif nuclear@1: #endif nuclear@1: #endif nuclear@1: nuclear@1: /* Called when finished processing a row of data */ nuclear@1: PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* Internal use only. Called before first row of data */ nuclear@1: PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: #if defined(PNG_READ_GAMMA_SUPPORTED) nuclear@1: PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: /* combine a row of data, dealing with alpha, etc. if requested */ nuclear@1: PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row, nuclear@1: int mask)); nuclear@1: nuclear@1: #if defined(PNG_READ_INTERLACING_SUPPORTED) nuclear@1: /* expand an interlaced row */ nuclear@1: /* OLD pre-1.0.9 interface: nuclear@1: PNG_EXTERN void png_do_read_interlace PNGARG((png_row_infop row_info, nuclear@1: png_bytep row, int pass, png_uint_32 transformations)); nuclear@1: */ nuclear@1: PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: /* GRR TO DO (2.0 or whenever): simplify other internal calling interfaces */ nuclear@1: nuclear@1: #if defined(PNG_WRITE_INTERLACING_SUPPORTED) nuclear@1: /* grab pixels out of a row for an interlaced pass */ nuclear@1: PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info, nuclear@1: png_bytep row, int pass)); nuclear@1: #endif nuclear@1: nuclear@1: /* unfilter a row */ nuclear@1: PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr, nuclear@1: png_row_infop row_info, png_bytep row, png_bytep prev_row, int filter)); nuclear@1: nuclear@1: /* Choose the best filter to use and filter the row data */ nuclear@1: PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr, nuclear@1: png_row_infop row_info)); nuclear@1: nuclear@1: /* Write out the filtered row. */ nuclear@1: PNG_EXTERN void png_write_filtered_row PNGARG((png_structp png_ptr, nuclear@1: png_bytep filtered_row)); nuclear@1: /* finish a row while reading, dealing with interlacing passes, etc. */ nuclear@1: PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* initialize the row buffers, etc. */ nuclear@1: PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr)); nuclear@1: /* optional call to update the users info structure */ nuclear@1: PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: nuclear@1: /* these are the functions that do the transformations */ nuclear@1: #if defined(PNG_READ_FILLER_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, nuclear@1: png_bytep row, png_uint_32 filler, png_uint_32 flags)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info, nuclear@1: png_bytep row)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info, nuclear@1: png_bytep row)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info, nuclear@1: png_bytep row)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info, nuclear@1: png_bytep row)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_FILLER_SUPPORTED) || \ nuclear@1: defined(PNG_READ_STRIP_ALPHA_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_strip_filler PNGARG((png_row_infop row_info, nuclear@1: png_bytep row, png_uint_32 flags)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, png_bytep row)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, png_bytep row)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED) nuclear@1: PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, png_row_infop nuclear@1: row_info, png_bytep row)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info, nuclear@1: png_bytep row)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_PACK_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, png_bytep row)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_SHIFT_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, png_bytep row, nuclear@1: png_color_8p sig_bits)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, png_bytep row)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_16_TO_8_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, png_bytep row)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_DITHER_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_dither PNGARG((png_row_infop row_info, nuclear@1: png_bytep row, png_bytep palette_lookup, png_bytep dither_lookup)); nuclear@1: nuclear@1: # if defined(PNG_CORRECT_PALETTE_SUPPORTED) nuclear@1: PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr, nuclear@1: png_colorp palette, int num_palette)); nuclear@1: # endif nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, png_bytep row)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_PACK_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info, nuclear@1: png_bytep row, png_uint_32 bit_depth)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_WRITE_SHIFT_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, png_bytep row, nuclear@1: png_color_8p bit_depth)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_BACKGROUND_SUPPORTED) nuclear@1: #if defined(PNG_READ_GAMMA_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row, nuclear@1: png_color_16p trans_values, png_color_16p background, nuclear@1: png_color_16p background_1, nuclear@1: png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1, nuclear@1: png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1, nuclear@1: png_uint_16pp gamma_16_to_1, int gamma_shift)); nuclear@1: #else nuclear@1: PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row, nuclear@1: png_color_16p trans_values, png_color_16p background)); nuclear@1: #endif nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_GAMMA_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, png_bytep row, nuclear@1: png_bytep gamma_table, png_uint_16pp gamma_16_table, nuclear@1: int gamma_shift)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_EXPAND_SUPPORTED) nuclear@1: PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info, nuclear@1: png_bytep row, png_colorp palette, png_bytep trans, int num_trans)); nuclear@1: PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info, nuclear@1: png_bytep row, png_color_16p trans_value)); nuclear@1: #endif nuclear@1: nuclear@1: /* The following decodes the appropriate chunks, and does error correction, nuclear@1: * then calls the appropriate callback for the chunk if it is valid. nuclear@1: */ nuclear@1: nuclear@1: /* decode the IHDR chunk */ nuclear@1: PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: nuclear@1: #if defined(PNG_READ_bKGD_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_cHRM_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_gAMA_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_hIST_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_iCCP_SUPPORTED) nuclear@1: extern void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif /* PNG_READ_iCCP_SUPPORTED */ nuclear@1: nuclear@1: #if defined(PNG_READ_iTXt_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_oFFs_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_pCAL_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_pHYs_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_sBIT_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_sCAL_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_sPLT_SUPPORTED) nuclear@1: extern void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif /* PNG_READ_sPLT_SUPPORTED */ nuclear@1: nuclear@1: #if defined(PNG_READ_sRGB_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_tEXt_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_tIME_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_tRNS_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_READ_zTXt_SUPPORTED) nuclear@1: PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr, nuclear@1: png_uint_32 length)); nuclear@1: #endif nuclear@1: nuclear@1: PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_32 length)); nuclear@1: nuclear@1: PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr, nuclear@1: png_bytep chunk_name)); nuclear@1: nuclear@1: /* handle the transformations for reading and writing */ nuclear@1: PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr)); nuclear@1: PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: #ifdef PNG_PROGRESSIVE_READ_SUPPORTED nuclear@1: PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr)); nuclear@1: PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr, nuclear@1: png_uint_32 length)); nuclear@1: PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr)); nuclear@1: PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr)); nuclear@1: PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr, nuclear@1: png_bytep buffer, png_size_t buffer_length)); nuclear@1: PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr)); nuclear@1: PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr, nuclear@1: png_bytep buffer, png_size_t buffer_length)); nuclear@1: PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr)); nuclear@1: PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_32 length)); nuclear@1: PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row)); nuclear@1: PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr)); nuclear@1: #if defined(PNG_READ_tEXt_SUPPORTED) nuclear@1: PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_32 length)); nuclear@1: PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: #endif nuclear@1: #if defined(PNG_READ_zTXt_SUPPORTED) nuclear@1: PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_32 length)); nuclear@1: PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: #endif nuclear@1: #if defined(PNG_READ_iTXt_SUPPORTED) nuclear@1: PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_32 length)); nuclear@1: PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: #endif nuclear@1: nuclear@1: #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ nuclear@1: nuclear@1: #ifdef PNG_MNG_FEATURES_SUPPORTED nuclear@1: PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info, nuclear@1: png_bytep row)); nuclear@1: PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info, nuclear@1: png_bytep row)); nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) nuclear@1: #if defined(PNG_MMX_CODE_SUPPORTED) nuclear@1: /* png.c */ /* PRIVATE */ nuclear@1: PNG_EXTERN void png_init_mmx_flags PNGARG((png_structp png_ptr)); nuclear@1: #endif nuclear@1: #endif nuclear@1: nuclear@1: #if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED) nuclear@1: PNG_EXTERN png_uint_32 png_get_pixels_per_inch PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: nuclear@1: PNG_EXTERN png_uint_32 png_get_x_pixels_per_inch PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: nuclear@1: PNG_EXTERN png_uint_32 png_get_y_pixels_per_inch PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: nuclear@1: PNG_EXTERN float png_get_x_offset_inches PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: nuclear@1: PNG_EXTERN float png_get_y_offset_inches PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr)); nuclear@1: nuclear@1: #if defined(PNG_pHYs_SUPPORTED) nuclear@1: PNG_EXTERN png_uint_32 png_get_pHYs_dpi PNGARG((png_structp png_ptr, nuclear@1: png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type)); nuclear@1: #endif /* PNG_pHYs_SUPPORTED */ nuclear@1: #endif /* PNG_INCH_CONVERSIONS && PNG_FLOATING_POINT_SUPPORTED */ nuclear@1: nuclear@1: /* Read the chunk header (length + type name) */ nuclear@1: PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr)); nuclear@1: nuclear@1: /* Maintainer: Put new private prototypes here ^ and in libpngpf.3 */ nuclear@1: nuclear@1: #endif /* PNG_INTERNAL */ nuclear@1: nuclear@1: #ifdef __cplusplus nuclear@1: } nuclear@1: #endif nuclear@1: nuclear@1: #endif /* PNG_VERSION_INFO_ONLY */ nuclear@1: /* do not put anything past this line */ nuclear@1: #endif /* PNG_H */