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00425 #ifndef PNG_H
00426 #define PNG_H
00427
00428
00429
00430
00431
00432
00433
00434
00435 #define PNG_LIBPNG_VER_STRING "1.2.37"
00436 #define PNG_HEADER_VERSION_STRING \
00437 " libpng version 1.2.37 - June 4, 2009\n"
00438
00439 #define PNG_LIBPNG_VER_SONUM 0
00440 #define PNG_LIBPNG_VER_DLLNUM 13
00441
00442
00443 #define PNG_LIBPNG_VER_MAJOR 1
00444 #define PNG_LIBPNG_VER_MINOR 2
00445 #define PNG_LIBPNG_VER_RELEASE 37
00446
00447
00448
00449 #define PNG_LIBPNG_VER_BUILD 0
00450
00451
00452 #define PNG_LIBPNG_BUILD_ALPHA 1
00453 #define PNG_LIBPNG_BUILD_BETA 2
00454 #define PNG_LIBPNG_BUILD_RC 3
00455 #define PNG_LIBPNG_BUILD_STABLE 4
00456 #define PNG_LIBPNG_BUILD_RELEASE_STATUS_MASK 7
00457
00458
00459 #define PNG_LIBPNG_BUILD_PATCH 8
00460
00461 #define PNG_LIBPNG_BUILD_PRIVATE 16
00462
00463 #define PNG_LIBPNG_BUILD_SPECIAL 32
00464
00465
00466 #define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_STABLE
00467
00468
00469
00470
00471
00472
00473 #define PNG_LIBPNG_VER 10237
00474
00475 #ifndef PNG_VERSION_INFO_ONLY
00476
00477 #include "zlib.h"
00478 #endif
00479
00480
00481 #include "pngconf.h"
00482
00483
00484
00485
00486
00487
00488
00489
00490
00491
00492
00493
00494
00495
00496 #if defined(PNG_USER_PRIVATEBUILD)
00497 # define PNG_LIBPNG_BUILD_TYPE \
00498 (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_PRIVATE)
00499 #else
00500 # if defined(PNG_LIBPNG_SPECIALBUILD)
00501 # define PNG_LIBPNG_BUILD_TYPE \
00502 (PNG_LIBPNG_BUILD_BASE_TYPE | PNG_LIBPNG_BUILD_SPECIAL)
00503 # else
00504 # define PNG_LIBPNG_BUILD_TYPE (PNG_LIBPNG_BUILD_BASE_TYPE)
00505 # endif
00506 #endif
00507
00508 #ifndef PNG_VERSION_INFO_ONLY
00509
00510
00511 #ifdef __cplusplus
00512 extern "C" {
00513 #endif
00514
00515
00516
00517
00518
00519
00520
00521 #ifndef PNG_NO_TYPECAST_NULL
00522 #define int_p_NULL (int *)NULL
00523 #define png_bytep_NULL (png_bytep)NULL
00524 #define png_bytepp_NULL (png_bytepp)NULL
00525 #define png_doublep_NULL (png_doublep)NULL
00526 #define png_error_ptr_NULL (png_error_ptr)NULL
00527 #define png_flush_ptr_NULL (png_flush_ptr)NULL
00528 #define png_free_ptr_NULL (png_free_ptr)NULL
00529 #define png_infopp_NULL (png_infopp)NULL
00530 #define png_malloc_ptr_NULL (png_malloc_ptr)NULL
00531 #define png_read_status_ptr_NULL (png_read_status_ptr)NULL
00532 #define png_rw_ptr_NULL (png_rw_ptr)NULL
00533 #define png_structp_NULL (png_structp)NULL
00534 #define png_uint_16p_NULL (png_uint_16p)NULL
00535 #define png_voidp_NULL (png_voidp)NULL
00536 #define png_write_status_ptr_NULL (png_write_status_ptr)NULL
00537 #else
00538 #define int_p_NULL NULL
00539 #define png_bytep_NULL NULL
00540 #define png_bytepp_NULL NULL
00541 #define png_doublep_NULL NULL
00542 #define png_error_ptr_NULL NULL
00543 #define png_flush_ptr_NULL NULL
00544 #define png_free_ptr_NULL NULL
00545 #define png_infopp_NULL NULL
00546 #define png_malloc_ptr_NULL NULL
00547 #define png_read_status_ptr_NULL NULL
00548 #define png_rw_ptr_NULL NULL
00549 #define png_structp_NULL NULL
00550 #define png_uint_16p_NULL NULL
00551 #define png_voidp_NULL NULL
00552 #define png_write_status_ptr_NULL NULL
00553 #endif
00554
00555
00556 #if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN)
00557
00558
00559
00560 #ifdef PNG_USE_GLOBAL_ARRAYS
00561 PNG_EXPORT_VAR (PNG_CONST char) png_libpng_ver[18];
00562
00563 #else
00564 #define png_libpng_ver png_get_header_ver(NULL)
00565 #endif
00566
00567 #ifdef PNG_USE_GLOBAL_ARRAYS
00568
00569
00570 PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_start[7];
00571 PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_inc[7];
00572 PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_ystart[7];
00573 PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_yinc[7];
00574 PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_mask[7];
00575 PNG_EXPORT_VAR (PNG_CONST int FARDATA) png_pass_dsp_mask[7];
00576
00577
00578
00579 #endif
00580
00581 #endif
00582
00583
00584
00585
00586
00587 typedef struct png_color_struct
00588 {
00589 png_byte red;
00590 png_byte green;
00591 png_byte blue;
00592 } png_color;
00593 typedef png_color FAR * png_colorp;
00594 typedef png_color FAR * FAR * png_colorpp;
00595
00596 typedef struct png_color_16_struct
00597 {
00598 png_byte index;
00599 png_uint_16 red;
00600 png_uint_16 green;
00601 png_uint_16 blue;
00602 png_uint_16 gray;
00603 } png_color_16;
00604 typedef png_color_16 FAR * png_color_16p;
00605 typedef png_color_16 FAR * FAR * png_color_16pp;
00606
00607 typedef struct png_color_8_struct
00608 {
00609 png_byte red;
00610 png_byte green;
00611 png_byte blue;
00612 png_byte gray;
00613 png_byte alpha;
00614 } png_color_8;
00615 typedef png_color_8 FAR * png_color_8p;
00616 typedef png_color_8 FAR * FAR * png_color_8pp;
00617
00618
00619
00620
00621
00622 typedef struct png_sPLT_entry_struct
00623 {
00624 png_uint_16 red;
00625 png_uint_16 green;
00626 png_uint_16 blue;
00627 png_uint_16 alpha;
00628 png_uint_16 frequency;
00629 } png_sPLT_entry;
00630 typedef png_sPLT_entry FAR * png_sPLT_entryp;
00631 typedef png_sPLT_entry FAR * FAR * png_sPLT_entrypp;
00632
00633
00634
00635
00636
00637
00638 typedef struct png_sPLT_struct
00639 {
00640 png_charp name;
00641 png_byte depth;
00642 png_sPLT_entryp entries;
00643 png_int_32 nentries;
00644 } png_sPLT_t;
00645 typedef png_sPLT_t FAR * png_sPLT_tp;
00646 typedef png_sPLT_t FAR * FAR * png_sPLT_tpp;
00647
00648 #ifdef PNG_TEXT_SUPPORTED
00649
00650
00651
00652
00653
00654
00655
00656
00657 typedef struct png_text_struct
00658 {
00659 int compression;
00660
00661
00662
00663
00664 png_charp key;
00665 png_charp text;
00666
00667 png_size_t text_length;
00668 #ifdef PNG_iTXt_SUPPORTED
00669 png_size_t itxt_length;
00670 png_charp lang;
00671
00672 png_charp lang_key;
00673
00674 #endif
00675 } png_text;
00676 typedef png_text FAR * png_textp;
00677 typedef png_text FAR * FAR * png_textpp;
00678 #endif
00679
00680
00681
00682 #define PNG_TEXT_COMPRESSION_NONE_WR -3
00683 #define PNG_TEXT_COMPRESSION_zTXt_WR -2
00684 #define PNG_TEXT_COMPRESSION_NONE -1
00685 #define PNG_TEXT_COMPRESSION_zTXt 0
00686 #define PNG_ITXT_COMPRESSION_NONE 1
00687 #define PNG_ITXT_COMPRESSION_zTXt 2
00688 #define PNG_TEXT_COMPRESSION_LAST 3
00689
00690
00691
00692
00693
00694
00695
00696 typedef struct png_time_struct
00697 {
00698 png_uint_16 year;
00699 png_byte month;
00700 png_byte day;
00701 png_byte hour;
00702 png_byte minute;
00703 png_byte second;
00704 } png_time;
00705 typedef png_time FAR * png_timep;
00706 typedef png_time FAR * FAR * png_timepp;
00707
00708 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
00709
00710
00711
00712
00713
00714 #define PNG_CHUNK_NAME_LENGTH 5
00715 typedef struct png_unknown_chunk_t
00716 {
00717 png_byte name[PNG_CHUNK_NAME_LENGTH];
00718 png_byte *data;
00719 png_size_t size;
00720
00721
00722 png_byte location;
00723 }
00724 png_unknown_chunk;
00725 typedef png_unknown_chunk FAR * png_unknown_chunkp;
00726 typedef png_unknown_chunk FAR * FAR * png_unknown_chunkpp;
00727 #endif
00728
00729
00730
00731
00732
00733
00734
00735
00736
00737
00738
00739
00740
00741
00742
00743
00744
00745
00746
00747
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00750
00751
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00753
00754
00755
00756
00757
00758
00759
00760
00761
00762
00763
00764
00765
00766
00767
00768 typedef struct png_info_struct
00769 {
00770
00771 png_uint_32 width;
00772 png_uint_32 height;
00773 png_uint_32 valid;
00774 png_uint_32 rowbytes;
00775 png_colorp palette;
00776 png_uint_16 num_palette;
00777 png_uint_16 num_trans;
00778 png_byte bit_depth;
00779 png_byte color_type;
00780
00781 png_byte compression_type;
00782 png_byte filter_type;
00783 png_byte interlace_type;
00784
00785
00786 png_byte channels;
00787 png_byte pixel_depth;
00788 png_byte spare_byte;
00789 png_byte signature[8];
00790
00791
00792
00793
00794
00795
00796
00797 #if defined(PNG_gAMA_SUPPORTED) && defined(PNG_FLOATING_POINT_SUPPORTED)
00798
00799
00800
00801
00802 float gamma;
00803 #endif
00804
00805 #if defined(PNG_sRGB_SUPPORTED)
00806
00807
00808 png_byte srgb_intent;
00809 #endif
00810
00811 #if defined(PNG_TEXT_SUPPORTED)
00812
00813
00814
00815
00816
00817
00818
00819
00820 int num_text;
00821 int max_text;
00822 png_textp text;
00823 #endif
00824
00825 #if defined(PNG_tIME_SUPPORTED)
00826
00827
00828
00829 png_time mod_time;
00830 #endif
00831
00832 #if defined(PNG_sBIT_SUPPORTED)
00833
00834
00835
00836
00837
00838
00839 png_color_8 sig_bit;
00840 #endif
00841
00842 #if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \
00843 defined(PNG_READ_BACKGROUND_SUPPORTED)
00844
00845
00846
00847
00848
00849
00850
00851
00852
00853 png_bytep trans;
00854 png_color_16 trans_values;
00855 #endif
00856
00857 #if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
00858
00859
00860
00861
00862
00863
00864 png_color_16 background;
00865 #endif
00866
00867 #if defined(PNG_oFFs_SUPPORTED)
00868
00869
00870
00871
00872
00873 png_int_32 x_offset;
00874 png_int_32 y_offset;
00875 png_byte offset_unit_type;
00876 #endif
00877
00878 #if defined(PNG_pHYs_SUPPORTED)
00879
00880
00881
00882
00883 png_uint_32 x_pixels_per_unit;
00884 png_uint_32 y_pixels_per_unit;
00885 png_byte phys_unit_type;
00886 #endif
00887
00888 #if defined(PNG_hIST_SUPPORTED)
00889
00890
00891
00892
00893
00894
00895 png_uint_16p hist;
00896 #endif
00897
00898 #ifdef PNG_cHRM_SUPPORTED
00899
00900
00901
00902
00903
00904
00905 #ifdef PNG_FLOATING_POINT_SUPPORTED
00906 float x_white;
00907 float y_white;
00908 float x_red;
00909 float y_red;
00910 float x_green;
00911 float y_green;
00912 float x_blue;
00913 float y_blue;
00914 #endif
00915 #endif
00916
00917 #if defined(PNG_pCAL_SUPPORTED)
00918
00919
00920
00921
00922
00923
00924
00925
00926
00927
00928
00929 png_charp pcal_purpose;
00930 png_int_32 pcal_X0;
00931 png_int_32 pcal_X1;
00932 png_charp pcal_units;
00933 png_charpp pcal_params;
00934 png_byte pcal_type;
00935 png_byte pcal_nparams;
00936 #endif
00937
00938
00939 #ifdef PNG_FREE_ME_SUPPORTED
00940 png_uint_32 free_me;
00941 #endif
00942
00943 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
00944
00945 png_unknown_chunkp unknown_chunks;
00946 png_size_t unknown_chunks_num;
00947 #endif
00948
00949 #if defined(PNG_iCCP_SUPPORTED)
00950
00951 png_charp iccp_name;
00952 png_charp iccp_profile;
00953
00954 png_uint_32 iccp_proflen;
00955 png_byte iccp_compression;
00956 #endif
00957
00958 #if defined(PNG_sPLT_SUPPORTED)
00959
00960 png_sPLT_tp splt_palettes;
00961 png_uint_32 splt_palettes_num;
00962 #endif
00963
00964 #if defined(PNG_sCAL_SUPPORTED)
00965
00966
00967
00968
00969
00970
00971
00972 png_byte scal_unit;
00973 #ifdef PNG_FLOATING_POINT_SUPPORTED
00974 double scal_pixel_width;
00975 double scal_pixel_height;
00976 #endif
00977 #ifdef PNG_FIXED_POINT_SUPPORTED
00978 png_charp scal_s_width;
00979 png_charp scal_s_height;
00980 #endif
00981 #endif
00982
00983 #if defined(PNG_INFO_IMAGE_SUPPORTED)
00984
00985
00986 png_bytepp row_pointers;
00987 #endif
00988
00989 #if defined(PNG_FIXED_POINT_SUPPORTED) && defined(PNG_gAMA_SUPPORTED)
00990 png_fixed_point int_gamma;
00991 #endif
00992
00993 #if defined(PNG_cHRM_SUPPORTED) && defined(PNG_FIXED_POINT_SUPPORTED)
00994 png_fixed_point int_x_white;
00995 png_fixed_point int_y_white;
00996 png_fixed_point int_x_red;
00997 png_fixed_point int_y_red;
00998 png_fixed_point int_x_green;
00999 png_fixed_point int_y_green;
01000 png_fixed_point int_x_blue;
01001 png_fixed_point int_y_blue;
01002 #endif
01003
01004 } png_info;
01005
01006 typedef png_info FAR * png_infop;
01007 typedef png_info FAR * FAR * png_infopp;
01008
01009
01010 #define PNG_UINT_31_MAX ((png_uint_32)0x7fffffffL)
01011 #define PNG_UINT_32_MAX ((png_uint_32)(-1))
01012 #define PNG_SIZE_MAX ((png_size_t)(-1))
01013 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
01014
01015 #define PNG_MAX_UINT PNG_UINT_31_MAX
01016 #endif
01017
01018
01019
01020 #define PNG_COLOR_MASK_PALETTE 1
01021 #define PNG_COLOR_MASK_COLOR 2
01022 #define PNG_COLOR_MASK_ALPHA 4
01023
01024
01025 #define PNG_COLOR_TYPE_GRAY 0
01026 #define PNG_COLOR_TYPE_PALETTE (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_PALETTE)
01027 #define PNG_COLOR_TYPE_RGB (PNG_COLOR_MASK_COLOR)
01028 #define PNG_COLOR_TYPE_RGB_ALPHA (PNG_COLOR_MASK_COLOR | PNG_COLOR_MASK_ALPHA)
01029 #define PNG_COLOR_TYPE_GRAY_ALPHA (PNG_COLOR_MASK_ALPHA)
01030
01031 #define PNG_COLOR_TYPE_RGBA PNG_COLOR_TYPE_RGB_ALPHA
01032 #define PNG_COLOR_TYPE_GA PNG_COLOR_TYPE_GRAY_ALPHA
01033
01034
01035 #define PNG_COMPRESSION_TYPE_BASE 0
01036 #define PNG_COMPRESSION_TYPE_DEFAULT PNG_COMPRESSION_TYPE_BASE
01037
01038
01039 #define PNG_FILTER_TYPE_BASE 0
01040 #define PNG_INTRAPIXEL_DIFFERENCING 64
01041 #define PNG_FILTER_TYPE_DEFAULT PNG_FILTER_TYPE_BASE
01042
01043
01044 #define PNG_INTERLACE_NONE 0
01045 #define PNG_INTERLACE_ADAM7 1
01046 #define PNG_INTERLACE_LAST 2
01047
01048
01049 #define PNG_OFFSET_PIXEL 0
01050 #define PNG_OFFSET_MICROMETER 1
01051 #define PNG_OFFSET_LAST 2
01052
01053
01054 #define PNG_EQUATION_LINEAR 0
01055 #define PNG_EQUATION_BASE_E 1
01056 #define PNG_EQUATION_ARBITRARY 2
01057 #define PNG_EQUATION_HYPERBOLIC 3
01058 #define PNG_EQUATION_LAST 4
01059
01060
01061 #define PNG_SCALE_UNKNOWN 0
01062 #define PNG_SCALE_METER 1
01063 #define PNG_SCALE_RADIAN 2
01064 #define PNG_SCALE_LAST 3
01065
01066
01067 #define PNG_RESOLUTION_UNKNOWN 0
01068 #define PNG_RESOLUTION_METER 1
01069 #define PNG_RESOLUTION_LAST 2
01070
01071
01072 #define PNG_sRGB_INTENT_PERCEPTUAL 0
01073 #define PNG_sRGB_INTENT_RELATIVE 1
01074 #define PNG_sRGB_INTENT_SATURATION 2
01075 #define PNG_sRGB_INTENT_ABSOLUTE 3
01076 #define PNG_sRGB_INTENT_LAST 4
01077
01078
01079 #define PNG_KEYWORD_MAX_LENGTH 79
01080
01081
01082 #define PNG_MAX_PALETTE_LENGTH 256
01083
01084
01085
01086
01087
01088
01089 #define PNG_INFO_gAMA 0x0001
01090 #define PNG_INFO_sBIT 0x0002
01091 #define PNG_INFO_cHRM 0x0004
01092 #define PNG_INFO_PLTE 0x0008
01093 #define PNG_INFO_tRNS 0x0010
01094 #define PNG_INFO_bKGD 0x0020
01095 #define PNG_INFO_hIST 0x0040
01096 #define PNG_INFO_pHYs 0x0080
01097 #define PNG_INFO_oFFs 0x0100
01098 #define PNG_INFO_tIME 0x0200
01099 #define PNG_INFO_pCAL 0x0400
01100 #define PNG_INFO_sRGB 0x0800
01101 #define PNG_INFO_iCCP 0x1000
01102 #define PNG_INFO_sPLT 0x2000
01103 #define PNG_INFO_sCAL 0x4000
01104 #define PNG_INFO_IDAT 0x8000L
01105
01106
01107
01108
01109
01110 typedef struct png_row_info_struct
01111 {
01112 png_uint_32 width;
01113 png_uint_32 rowbytes;
01114 png_byte color_type;
01115 png_byte bit_depth;
01116 png_byte channels;
01117 png_byte pixel_depth;
01118 } png_row_info;
01119
01120 typedef png_row_info FAR * png_row_infop;
01121 typedef png_row_info FAR * FAR * png_row_infopp;
01122
01123
01124
01125
01126
01127
01128
01129 typedef struct png_struct_def png_struct;
01130 typedef png_struct FAR * png_structp;
01131
01132 typedef void (PNGAPI *png_error_ptr) PNGARG((png_structp, png_const_charp));
01133 typedef void (PNGAPI *png_rw_ptr) PNGARG((png_structp, png_bytep, png_size_t));
01134 typedef void (PNGAPI *png_flush_ptr) PNGARG((png_structp));
01135 typedef void (PNGAPI *png_read_status_ptr) PNGARG((png_structp, png_uint_32,
01136 int));
01137 typedef void (PNGAPI *png_write_status_ptr) PNGARG((png_structp, png_uint_32,
01138 int));
01139
01140 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
01141 typedef void (PNGAPI *png_progressive_info_ptr) PNGARG((png_structp, png_infop));
01142 typedef void (PNGAPI *png_progressive_end_ptr) PNGARG((png_structp, png_infop));
01143 typedef void (PNGAPI *png_progressive_row_ptr) PNGARG((png_structp, png_bytep,
01144 png_uint_32, int));
01145 #endif
01146
01147 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
01148 defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \
01149 defined(PNG_LEGACY_SUPPORTED)
01150 typedef void (PNGAPI *png_user_transform_ptr) PNGARG((png_structp,
01151 png_row_infop, png_bytep));
01152 #endif
01153
01154 #if defined(PNG_USER_CHUNKS_SUPPORTED)
01155 typedef int (PNGAPI *png_user_chunk_ptr) PNGARG((png_structp, png_unknown_chunkp));
01156 #endif
01157 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
01158 typedef void (PNGAPI *png_unknown_chunk_ptr) PNGARG((png_structp));
01159 #endif
01160
01161
01162 #define PNG_TRANSFORM_IDENTITY 0x0000
01163 #define PNG_TRANSFORM_STRIP_16 0x0001
01164 #define PNG_TRANSFORM_STRIP_ALPHA 0x0002
01165 #define PNG_TRANSFORM_PACKING 0x0004
01166 #define PNG_TRANSFORM_PACKSWAP 0x0008
01167 #define PNG_TRANSFORM_EXPAND 0x0010
01168 #define PNG_TRANSFORM_INVERT_MONO 0x0020
01169 #define PNG_TRANSFORM_SHIFT 0x0040
01170 #define PNG_TRANSFORM_BGR 0x0080
01171 #define PNG_TRANSFORM_SWAP_ALPHA 0x0100
01172 #define PNG_TRANSFORM_SWAP_ENDIAN 0x0200
01173 #define PNG_TRANSFORM_INVERT_ALPHA 0x0400
01174 #define PNG_TRANSFORM_STRIP_FILLER 0x0800
01175
01176 #define PNG_TRANSFORM_STRIP_FILLER_BEFORE 0x0800
01177 #define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000
01178
01179
01180 #define PNG_FLAG_MNG_EMPTY_PLTE 0x01
01181 #define PNG_FLAG_MNG_FILTER_64 0x04
01182 #define PNG_ALL_MNG_FEATURES 0x05
01183
01184 typedef png_voidp (*png_malloc_ptr) PNGARG((png_structp, png_size_t));
01185 typedef void (*png_free_ptr) PNGARG((png_structp, png_voidp));
01186
01187
01188
01189
01190
01191
01192
01193
01194 struct png_struct_def
01195 {
01196 #ifdef PNG_SETJMP_SUPPORTED
01197 jmp_buf jmpbuf;
01198 #endif
01199 png_error_ptr error_fn;
01200 png_error_ptr warning_fn;
01201 png_voidp error_ptr;
01202 png_rw_ptr write_data_fn;
01203 png_rw_ptr read_data_fn;
01204 png_voidp io_ptr;
01205
01206 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
01207 png_user_transform_ptr read_user_transform_fn;
01208 #endif
01209
01210 #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
01211 png_user_transform_ptr write_user_transform_fn;
01212 #endif
01213
01214
01215 #if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
01216 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
01217 defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED)
01218 png_voidp user_transform_ptr;
01219 png_byte user_transform_depth;
01220 png_byte user_transform_channels;
01221 #endif
01222 #endif
01223
01224 png_uint_32 mode;
01225 png_uint_32 flags;
01226 png_uint_32 transformations;
01227
01228 z_stream zstream;
01229 png_bytep zbuf;
01230 png_size_t zbuf_size;
01231 int zlib_level;
01232 int zlib_method;
01233 int zlib_window_bits;
01234 int zlib_mem_level;
01235 int zlib_strategy;
01236
01237 png_uint_32 width;
01238 png_uint_32 height;
01239 png_uint_32 num_rows;
01240 png_uint_32 usr_width;
01241 png_uint_32 rowbytes;
01242 png_uint_32 irowbytes;
01243 png_uint_32 iwidth;
01244 png_uint_32 row_number;
01245 png_bytep prev_row;
01246 png_bytep row_buf;
01247 #ifndef PNG_NO_WRITE_FILTER
01248 png_bytep sub_row;
01249 png_bytep up_row;
01250 png_bytep avg_row;
01251 png_bytep paeth_row;
01252 #endif
01253 png_row_info row_info;
01254
01255 png_uint_32 idat_size;
01256 png_uint_32 crc;
01257 png_colorp palette;
01258 png_uint_16 num_palette;
01259 png_uint_16 num_trans;
01260 png_byte chunk_name[5];
01261 png_byte compression;
01262 png_byte filter;
01263 png_byte interlaced;
01264 png_byte pass;
01265 png_byte do_filter;
01266 png_byte color_type;
01267 png_byte bit_depth;
01268 png_byte usr_bit_depth;
01269 png_byte pixel_depth;
01270 png_byte channels;
01271 png_byte usr_channels;
01272 png_byte sig_bytes;
01273
01274 #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
01275 #ifdef PNG_LEGACY_SUPPORTED
01276 png_byte filler;
01277 #else
01278 png_uint_16 filler;
01279 #endif
01280 #endif
01281
01282 #if defined(PNG_bKGD_SUPPORTED)
01283 png_byte background_gamma_type;
01284 # ifdef PNG_FLOATING_POINT_SUPPORTED
01285 float background_gamma;
01286 # endif
01287 png_color_16 background;
01288 #if defined(PNG_READ_GAMMA_SUPPORTED)
01289 png_color_16 background_1;
01290 #endif
01291 #endif
01292
01293 #if defined(PNG_WRITE_FLUSH_SUPPORTED)
01294 png_flush_ptr output_flush_fn;
01295 png_uint_32 flush_dist;
01296 png_uint_32 flush_rows;
01297 #endif
01298
01299 #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
01300 int gamma_shift;
01301 #ifdef PNG_FLOATING_POINT_SUPPORTED
01302 float gamma;
01303 float screen_gamma;
01304 #endif
01305 #endif
01306
01307 #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
01308 png_bytep gamma_table;
01309 png_bytep gamma_from_1;
01310 png_bytep gamma_to_1;
01311 png_uint_16pp gamma_16_table;
01312 png_uint_16pp gamma_16_from_1;
01313 png_uint_16pp gamma_16_to_1;
01314 #endif
01315
01316 #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_sBIT_SUPPORTED)
01317 png_color_8 sig_bit;
01318 #endif
01319
01320 #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
01321 png_color_8 shift;
01322 #endif
01323
01324 #if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) \
01325 || defined(PNG_READ_EXPAND_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
01326 png_bytep trans;
01327 png_color_16 trans_values;
01328 #endif
01329
01330 png_read_status_ptr read_row_fn;
01331 png_write_status_ptr write_row_fn;
01332 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
01333 png_progressive_info_ptr info_fn;
01334 png_progressive_row_ptr row_fn;
01335 png_progressive_end_ptr end_fn;
01336 png_bytep save_buffer_ptr;
01337 png_bytep save_buffer;
01338 png_bytep current_buffer_ptr;
01339 png_bytep current_buffer;
01340 png_uint_32 push_length;
01341 png_uint_32 skip_length;
01342 png_size_t save_buffer_size;
01343 png_size_t save_buffer_max;
01344 png_size_t buffer_size;
01345 png_size_t current_buffer_size;
01346 int process_mode;
01347 int cur_palette;
01348
01349 # if defined(PNG_TEXT_SUPPORTED)
01350 png_size_t current_text_size;
01351 png_size_t current_text_left;
01352 png_charp current_text;
01353 png_charp current_text_ptr;
01354 # endif
01355 #endif
01356
01357 #if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__)
01358
01359 png_bytepp offset_table_ptr;
01360 png_bytep offset_table;
01361 png_uint_16 offset_table_number;
01362 png_uint_16 offset_table_count;
01363 png_uint_16 offset_table_count_free;
01364 #endif
01365
01366 #if defined(PNG_READ_DITHER_SUPPORTED)
01367 png_bytep palette_lookup;
01368 png_bytep dither_index;
01369 #endif
01370
01371 #if defined(PNG_READ_DITHER_SUPPORTED) || defined(PNG_hIST_SUPPORTED)
01372 png_uint_16p hist;
01373 #endif
01374
01375 #if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
01376 png_byte heuristic_method;
01377 png_byte num_prev_filters;
01378 png_bytep prev_filters;
01379 png_uint_16p filter_weights;
01380 png_uint_16p inv_filter_weights;
01381 png_uint_16p filter_costs;
01382 png_uint_16p inv_filter_costs;
01383 #endif
01384
01385 #if defined(PNG_TIME_RFC1123_SUPPORTED)
01386 png_charp time_buffer;
01387 #endif
01388
01389
01390
01391 #ifdef PNG_FREE_ME_SUPPORTED
01392 png_uint_32 free_me;
01393 #endif
01394
01395 #if defined(PNG_USER_CHUNKS_SUPPORTED)
01396 png_voidp user_chunk_ptr;
01397 png_user_chunk_ptr read_user_chunk_fn;
01398 #endif
01399
01400 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
01401 int num_chunk_list;
01402 png_bytep chunk_list;
01403 #endif
01404
01405
01406 #if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
01407 png_byte rgb_to_gray_status;
01408
01409 png_uint_16 rgb_to_gray_red_coeff;
01410 png_uint_16 rgb_to_gray_green_coeff;
01411 png_uint_16 rgb_to_gray_blue_coeff;
01412 #endif
01413
01414
01415 #if defined(PNG_MNG_FEATURES_SUPPORTED) || \
01416 defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
01417 defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
01418
01419 #ifdef PNG_1_0_X
01420 png_byte mng_features_permitted;
01421 #else
01422 png_uint_32 mng_features_permitted;
01423 #endif
01424 #endif
01425
01426
01427 #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
01428 png_fixed_point int_gamma;
01429 #endif
01430
01431
01432 #if defined(PNG_MNG_FEATURES_SUPPORTED)
01433 png_byte filter_type;
01434 #endif
01435
01436 #if defined(PNG_1_0_X)
01437
01438 png_uint_32 row_buf_size;
01439 #endif
01440
01441
01442 #if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
01443 # if !defined(PNG_1_0_X)
01444 # if defined(PNG_MMX_CODE_SUPPORTED)
01445 png_byte mmx_bitdepth_threshold;
01446 png_uint_32 mmx_rowbytes_threshold;
01447 # endif
01448 png_uint_32 asm_flags;
01449 # endif
01450 #endif
01451
01452
01453 #ifdef PNG_USER_MEM_SUPPORTED
01454 png_voidp mem_ptr;
01455 png_malloc_ptr malloc_fn;
01456 png_free_ptr free_fn;
01457 #endif
01458
01459
01460 png_bytep big_row_buf;
01461
01462 #if defined(PNG_READ_DITHER_SUPPORTED)
01463
01464 png_bytep dither_sort;
01465 png_bytep index_to_palette;
01466
01467 png_bytep palette_to_index;
01468
01469 #endif
01470
01471
01472 png_byte compression_type;
01473
01474 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
01475 png_uint_32 user_width_max;
01476 png_uint_32 user_height_max;
01477 #endif
01478
01479
01480 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
01481
01482 png_unknown_chunk unknown_chunk;
01483 #endif
01484
01485
01486 png_uint_32 old_big_row_buf_size, old_prev_row_size;
01487
01488
01489 png_charp chunkdata;
01490
01491 };
01492
01493
01494
01495
01496
01497 typedef png_structp version_1_2_37;
01498
01499 typedef png_struct FAR * FAR * png_structpp;
01500
01501
01502
01503
01504
01505
01506
01507
01508 extern PNG_EXPORT(png_uint_32,png_access_version_number) PNGARG((void));
01509
01510
01511
01512
01513 extern PNG_EXPORT(void,png_set_sig_bytes) PNGARG((png_structp png_ptr,
01514 int num_bytes));
01515
01516
01517
01518
01519
01520
01521 extern PNG_EXPORT(int,png_sig_cmp) PNGARG((png_bytep sig, png_size_t start,
01522 png_size_t num_to_check));
01523
01524
01525
01526
01527 extern PNG_EXPORT(int,png_check_sig) PNGARG((png_bytep sig, int num));
01528
01529
01530 extern PNG_EXPORT(png_structp,png_create_read_struct)
01531 PNGARG((png_const_charp user_png_ver, png_voidp error_ptr,
01532 png_error_ptr error_fn, png_error_ptr warn_fn));
01533
01534
01535 extern PNG_EXPORT(png_structp,png_create_write_struct)
01536 PNGARG((png_const_charp user_png_ver, png_voidp error_ptr,
01537 png_error_ptr error_fn, png_error_ptr warn_fn));
01538
01539 #ifdef PNG_WRITE_SUPPORTED
01540 extern PNG_EXPORT(png_uint_32,png_get_compression_buffer_size)
01541 PNGARG((png_structp png_ptr));
01542 #endif
01543
01544 #ifdef PNG_WRITE_SUPPORTED
01545 extern PNG_EXPORT(void,png_set_compression_buffer_size)
01546 PNGARG((png_structp png_ptr, png_uint_32 size));
01547 #endif
01548
01549
01550 extern PNG_EXPORT(int,png_reset_zstream) PNGARG((png_structp png_ptr));
01551
01552
01553 #ifdef PNG_USER_MEM_SUPPORTED
01554 extern PNG_EXPORT(png_structp,png_create_read_struct_2)
01555 PNGARG((png_const_charp user_png_ver, png_voidp error_ptr,
01556 png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
01557 png_malloc_ptr malloc_fn, png_free_ptr free_fn));
01558 extern PNG_EXPORT(png_structp,png_create_write_struct_2)
01559 PNGARG((png_const_charp user_png_ver, png_voidp error_ptr,
01560 png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr,
01561 png_malloc_ptr malloc_fn, png_free_ptr free_fn));
01562 #endif
01563
01564
01565 extern PNG_EXPORT(void,png_write_chunk) PNGARG((png_structp png_ptr,
01566 png_bytep chunk_name, png_bytep data, png_size_t length));
01567
01568
01569 extern PNG_EXPORT(void,png_write_chunk_start) PNGARG((png_structp png_ptr,
01570 png_bytep chunk_name, png_uint_32 length));
01571
01572
01573 extern PNG_EXPORT(void,png_write_chunk_data) PNGARG((png_structp png_ptr,
01574 png_bytep data, png_size_t length));
01575
01576
01577 extern PNG_EXPORT(void,png_write_chunk_end) PNGARG((png_structp png_ptr));
01578
01579
01580 extern PNG_EXPORT(png_infop,png_create_info_struct)
01581 PNGARG((png_structp png_ptr));
01582
01583 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
01584
01585 extern PNG_EXPORT(void,png_info_init) PNGARG((png_infop info_ptr));
01586 #undef png_info_init
01587 #define png_info_init(info_ptr) png_info_init_3(&info_ptr,\
01588 png_sizeof(png_info));
01589 #endif
01590
01591 extern PNG_EXPORT(void,png_info_init_3) PNGARG((png_infopp info_ptr,
01592 png_size_t png_info_struct_size));
01593
01594
01595 extern PNG_EXPORT(void,png_write_info_before_PLTE) PNGARG((png_structp png_ptr,
01596 png_infop info_ptr));
01597 extern PNG_EXPORT(void,png_write_info) PNGARG((png_structp png_ptr,
01598 png_infop info_ptr));
01599
01600 #ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
01601
01602 extern PNG_EXPORT(void,png_read_info) PNGARG((png_structp png_ptr,
01603 png_infop info_ptr));
01604 #endif
01605
01606 #if defined(PNG_TIME_RFC1123_SUPPORTED)
01607 extern PNG_EXPORT(png_charp,png_convert_to_rfc1123)
01608 PNGARG((png_structp png_ptr, png_timep ptime));
01609 #endif
01610
01611 #if !defined(_WIN32_WCE)
01612
01613 #if defined(PNG_WRITE_tIME_SUPPORTED)
01614
01615 extern PNG_EXPORT(void,png_convert_from_struct_tm) PNGARG((png_timep ptime,
01616 struct tm FAR * ttime));
01617
01618
01619 extern PNG_EXPORT(void,png_convert_from_time_t) PNGARG((png_timep ptime,
01620 time_t ttime));
01621 #endif
01622 #endif
01623
01624 #if defined(PNG_READ_EXPAND_SUPPORTED)
01625
01626 extern PNG_EXPORT(void,png_set_expand) PNGARG((png_structp png_ptr));
01627 #if !defined(PNG_1_0_X)
01628 extern PNG_EXPORT(void,png_set_expand_gray_1_2_4_to_8) PNGARG((png_structp
01629 png_ptr));
01630 #endif
01631 extern PNG_EXPORT(void,png_set_palette_to_rgb) PNGARG((png_structp png_ptr));
01632 extern PNG_EXPORT(void,png_set_tRNS_to_alpha) PNGARG((png_structp png_ptr));
01633 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
01634
01635 extern PNG_EXPORT(void,png_set_gray_1_2_4_to_8) PNGARG((png_structp png_ptr));
01636 #endif
01637 #endif
01638
01639 #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
01640
01641 extern PNG_EXPORT(void,png_set_bgr) PNGARG((png_structp png_ptr));
01642 #endif
01643
01644 #if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
01645
01646 extern PNG_EXPORT(void,png_set_gray_to_rgb) PNGARG((png_structp png_ptr));
01647 #endif
01648
01649 #if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
01650
01651 #ifdef PNG_FLOATING_POINT_SUPPORTED
01652 extern PNG_EXPORT(void,png_set_rgb_to_gray) PNGARG((png_structp png_ptr,
01653 int error_action, double red, double green ));
01654 #endif
01655 extern PNG_EXPORT(void,png_set_rgb_to_gray_fixed) PNGARG((png_structp png_ptr,
01656 int error_action, png_fixed_point red, png_fixed_point green ));
01657 extern PNG_EXPORT(png_byte,png_get_rgb_to_gray_status) PNGARG((png_structp
01658 png_ptr));
01659 #endif
01660
01661 extern PNG_EXPORT(void,png_build_grayscale_palette) PNGARG((int bit_depth,
01662 png_colorp palette));
01663
01664 #if defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
01665 extern PNG_EXPORT(void,png_set_strip_alpha) PNGARG((png_structp png_ptr));
01666 #endif
01667
01668 #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED) || \
01669 defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
01670 extern PNG_EXPORT(void,png_set_swap_alpha) PNGARG((png_structp png_ptr));
01671 #endif
01672
01673 #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED) || \
01674 defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
01675 extern PNG_EXPORT(void,png_set_invert_alpha) PNGARG((png_structp png_ptr));
01676 #endif
01677
01678 #if defined(PNG_READ_FILLER_SUPPORTED) || defined(PNG_WRITE_FILLER_SUPPORTED)
01679
01680 extern PNG_EXPORT(void,png_set_filler) PNGARG((png_structp png_ptr,
01681 png_uint_32 filler, int flags));
01682
01683 #define PNG_FILLER_BEFORE 0
01684 #define PNG_FILLER_AFTER 1
01685
01686 #if !defined(PNG_1_0_X)
01687 extern PNG_EXPORT(void,png_set_add_alpha) PNGARG((png_structp png_ptr,
01688 png_uint_32 filler, int flags));
01689 #endif
01690 #endif
01691
01692 #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
01693
01694 extern PNG_EXPORT(void,png_set_swap) PNGARG((png_structp png_ptr));
01695 #endif
01696
01697 #if defined(PNG_READ_PACK_SUPPORTED) || defined(PNG_WRITE_PACK_SUPPORTED)
01698
01699 extern PNG_EXPORT(void,png_set_packing) PNGARG((png_structp png_ptr));
01700 #endif
01701
01702 #if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED)
01703
01704 extern PNG_EXPORT(void,png_set_packswap) PNGARG((png_structp png_ptr));
01705 #endif
01706
01707 #if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
01708
01709 extern PNG_EXPORT(void,png_set_shift) PNGARG((png_structp png_ptr,
01710 png_color_8p true_bits));
01711 #endif
01712
01713 #if defined(PNG_READ_INTERLACING_SUPPORTED) || \
01714 defined(PNG_WRITE_INTERLACING_SUPPORTED)
01715
01716 extern PNG_EXPORT(int,png_set_interlace_handling) PNGARG((png_structp png_ptr));
01717 #endif
01718
01719 #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
01720
01721 extern PNG_EXPORT(void,png_set_invert_mono) PNGARG((png_structp png_ptr));
01722 #endif
01723
01724 #if defined(PNG_READ_BACKGROUND_SUPPORTED)
01725
01726 #ifdef PNG_FLOATING_POINT_SUPPORTED
01727 extern PNG_EXPORT(void,png_set_background) PNGARG((png_structp png_ptr,
01728 png_color_16p background_color, int background_gamma_code,
01729 int need_expand, double background_gamma));
01730 #endif
01731 #define PNG_BACKGROUND_GAMMA_UNKNOWN 0
01732 #define PNG_BACKGROUND_GAMMA_SCREEN 1
01733 #define PNG_BACKGROUND_GAMMA_FILE 2
01734 #define PNG_BACKGROUND_GAMMA_UNIQUE 3
01735 #endif
01736
01737 #if defined(PNG_READ_16_TO_8_SUPPORTED)
01738
01739 extern PNG_EXPORT(void,png_set_strip_16) PNGARG((png_structp png_ptr));
01740 #endif
01741
01742 #if defined(PNG_READ_DITHER_SUPPORTED)
01743
01744 extern PNG_EXPORT(void,png_set_dither) PNGARG((png_structp png_ptr,
01745 png_colorp palette, int num_palette, int maximum_colors,
01746 png_uint_16p histogram, int full_dither));
01747 #endif
01748
01749 #if defined(PNG_READ_GAMMA_SUPPORTED)
01750
01751 #ifdef PNG_FLOATING_POINT_SUPPORTED
01752 extern PNG_EXPORT(void,png_set_gamma) PNGARG((png_structp png_ptr,
01753 double screen_gamma, double default_file_gamma));
01754 #endif
01755 #endif
01756
01757 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
01758 #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
01759 defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
01760
01761
01762 extern PNG_EXPORT(void,png_permit_empty_plte) PNGARG((png_structp png_ptr,
01763 int empty_plte_permitted));
01764 #endif
01765 #endif
01766
01767 #if defined(PNG_WRITE_FLUSH_SUPPORTED)
01768
01769 extern PNG_EXPORT(void,png_set_flush) PNGARG((png_structp png_ptr, int nrows));
01770
01771 extern PNG_EXPORT(void,png_write_flush) PNGARG((png_structp png_ptr));
01772 #endif
01773
01774
01775 extern PNG_EXPORT(void,png_start_read_image) PNGARG((png_structp png_ptr));
01776
01777
01778 extern PNG_EXPORT(void,png_read_update_info) PNGARG((png_structp png_ptr,
01779 png_infop info_ptr));
01780
01781 #ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
01782
01783 extern PNG_EXPORT(void,png_read_rows) PNGARG((png_structp png_ptr,
01784 png_bytepp row, png_bytepp display_row, png_uint_32 num_rows));
01785 #endif
01786
01787 #ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
01788
01789 extern PNG_EXPORT(void,png_read_row) PNGARG((png_structp png_ptr,
01790 png_bytep row,
01791 png_bytep display_row));
01792 #endif
01793
01794 #ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
01795
01796 extern PNG_EXPORT(void,png_read_image) PNGARG((png_structp png_ptr,
01797 png_bytepp image));
01798 #endif
01799
01800
01801 extern PNG_EXPORT(void,png_write_row) PNGARG((png_structp png_ptr,
01802 png_bytep row));
01803
01804
01805 extern PNG_EXPORT(void,png_write_rows) PNGARG((png_structp png_ptr,
01806 png_bytepp row, png_uint_32 num_rows));
01807
01808
01809 extern PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr,
01810 png_bytepp image));
01811
01812
01813 extern PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr,
01814 png_infop info_ptr));
01815
01816 #ifndef PNG_NO_SEQUENTIAL_READ_SUPPORTED
01817
01818 extern PNG_EXPORT(void,png_read_end) PNGARG((png_structp png_ptr,
01819 png_infop info_ptr));
01820 #endif
01821
01822
01823 extern PNG_EXPORT(void,png_destroy_info_struct) PNGARG((png_structp png_ptr,
01824 png_infopp info_ptr_ptr));
01825
01826
01827 extern PNG_EXPORT(void,png_destroy_read_struct) PNGARG((png_structpp
01828 png_ptr_ptr, png_infopp info_ptr_ptr, png_infopp end_info_ptr_ptr));
01829
01830
01831
01832 extern PNG_EXPORT(void,png_read_destroy) PNGARG((png_structp png_ptr, png_infop info_ptr,
01833 png_infop end_info_ptr));
01834
01835
01836 extern PNG_EXPORT(void,png_destroy_write_struct)
01837 PNGARG((png_structpp png_ptr_ptr, png_infopp info_ptr_ptr));
01838
01839
01840
01841 extern PNG_EXPORT(void,png_write_destroy) PNGARG((png_structp png_ptr));
01842
01843
01844 extern PNG_EXPORT(void,png_set_crc_action) PNGARG((png_structp png_ptr,
01845 int crit_action, int ancil_action));
01846
01847
01848
01849
01850
01851
01852
01853
01854
01855
01856 #define PNG_CRC_DEFAULT 0
01857 #define PNG_CRC_ERROR_QUIT 1
01858 #define PNG_CRC_WARN_DISCARD 2
01859 #define PNG_CRC_WARN_USE 3
01860 #define PNG_CRC_QUIET_USE 4
01861 #define PNG_CRC_NO_CHANGE 5
01862
01863
01864
01865
01866
01867
01868
01869
01870
01871
01872
01873
01874 extern PNG_EXPORT(void,png_set_filter) PNGARG((png_structp png_ptr, int method,
01875 int filters));
01876
01877
01878
01879
01880
01881
01882 #define PNG_NO_FILTERS 0x00
01883 #define PNG_FILTER_NONE 0x08
01884 #define PNG_FILTER_SUB 0x10
01885 #define PNG_FILTER_UP 0x20
01886 #define PNG_FILTER_AVG 0x40
01887 #define PNG_FILTER_PAETH 0x80
01888 #define PNG_ALL_FILTERS (PNG_FILTER_NONE | PNG_FILTER_SUB | PNG_FILTER_UP | \
01889 PNG_FILTER_AVG | PNG_FILTER_PAETH)
01890
01891
01892
01893
01894 #define PNG_FILTER_VALUE_NONE 0
01895 #define PNG_FILTER_VALUE_SUB 1
01896 #define PNG_FILTER_VALUE_UP 2
01897 #define PNG_FILTER_VALUE_AVG 3
01898 #define PNG_FILTER_VALUE_PAETH 4
01899 #define PNG_FILTER_VALUE_LAST 5
01900
01901 #if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED)
01902
01903
01904
01905
01906
01907
01908
01909
01910
01911
01912
01913
01914
01915
01916
01917
01918
01919
01920
01921
01922
01923
01924
01925
01926
01927
01928
01929
01930 #ifdef PNG_FLOATING_POINT_SUPPORTED
01931 extern PNG_EXPORT(void,png_set_filter_heuristics) PNGARG((png_structp png_ptr,
01932 int heuristic_method, int num_weights, png_doublep filter_weights,
01933 png_doublep filter_costs));
01934 #endif
01935 #endif
01936
01937
01938
01939
01940 #define PNG_FILTER_HEURISTIC_DEFAULT 0
01941 #define PNG_FILTER_HEURISTIC_UNWEIGHTED 1
01942 #define PNG_FILTER_HEURISTIC_WEIGHTED 2
01943 #define PNG_FILTER_HEURISTIC_LAST 3
01944
01945
01946
01947
01948
01949
01950
01951
01952 extern PNG_EXPORT(void,png_set_compression_level) PNGARG((png_structp png_ptr,
01953 int level));
01954
01955 extern PNG_EXPORT(void,png_set_compression_mem_level)
01956 PNGARG((png_structp png_ptr, int mem_level));
01957
01958 extern PNG_EXPORT(void,png_set_compression_strategy)
01959 PNGARG((png_structp png_ptr, int strategy));
01960
01961 extern PNG_EXPORT(void,png_set_compression_window_bits)
01962 PNGARG((png_structp png_ptr, int window_bits));
01963
01964 extern PNG_EXPORT(void,png_set_compression_method) PNGARG((png_structp png_ptr,
01965 int method));
01966
01967
01968
01969
01970
01971
01972
01973
01974
01975
01976 #if !defined(PNG_NO_STDIO)
01977
01978 extern PNG_EXPORT(void,png_init_io) PNGARG((png_structp png_ptr, png_FILE_p fp));
01979 #endif
01980
01981
01982
01983
01984
01985
01986
01987
01988
01989 extern PNG_EXPORT(void,png_set_error_fn) PNGARG((png_structp png_ptr,
01990 png_voidp error_ptr, png_error_ptr error_fn, png_error_ptr warning_fn));
01991
01992
01993 extern PNG_EXPORT(png_voidp,png_get_error_ptr) PNGARG((png_structp png_ptr));
01994
01995
01996
01997
01998
01999
02000
02001
02002
02003
02004
02005 extern PNG_EXPORT(void,png_set_write_fn) PNGARG((png_structp png_ptr,
02006 png_voidp io_ptr, png_rw_ptr write_data_fn, png_flush_ptr output_flush_fn));
02007
02008
02009 extern PNG_EXPORT(void,png_set_read_fn) PNGARG((png_structp png_ptr,
02010 png_voidp io_ptr, png_rw_ptr read_data_fn));
02011
02012
02013 extern PNG_EXPORT(png_voidp,png_get_io_ptr) PNGARG((png_structp png_ptr));
02014
02015 extern PNG_EXPORT(void,png_set_read_status_fn) PNGARG((png_structp png_ptr,
02016 png_read_status_ptr read_row_fn));
02017
02018 extern PNG_EXPORT(void,png_set_write_status_fn) PNGARG((png_structp png_ptr,
02019 png_write_status_ptr write_row_fn));
02020
02021 #ifdef PNG_USER_MEM_SUPPORTED
02022
02023 extern PNG_EXPORT(void,png_set_mem_fn) PNGARG((png_structp png_ptr,
02024 png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn));
02025
02026 extern PNG_EXPORT(png_voidp,png_get_mem_ptr) PNGARG((png_structp png_ptr));
02027 #endif
02028
02029 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
02030 defined(PNG_LEGACY_SUPPORTED)
02031 extern PNG_EXPORT(void,png_set_read_user_transform_fn) PNGARG((png_structp
02032 png_ptr, png_user_transform_ptr read_user_transform_fn));
02033 #endif
02034
02035 #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \
02036 defined(PNG_LEGACY_SUPPORTED)
02037 extern PNG_EXPORT(void,png_set_write_user_transform_fn) PNGARG((png_structp
02038 png_ptr, png_user_transform_ptr write_user_transform_fn));
02039 #endif
02040
02041 #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
02042 defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \
02043 defined(PNG_LEGACY_SUPPORTED)
02044 extern PNG_EXPORT(void,png_set_user_transform_info) PNGARG((png_structp
02045 png_ptr, png_voidp user_transform_ptr, int user_transform_depth,
02046 int user_transform_channels));
02047
02048 extern PNG_EXPORT(png_voidp,png_get_user_transform_ptr)
02049 PNGARG((png_structp png_ptr));
02050 #endif
02051
02052 #ifdef PNG_USER_CHUNKS_SUPPORTED
02053 extern PNG_EXPORT(void,png_set_read_user_chunk_fn) PNGARG((png_structp png_ptr,
02054 png_voidp user_chunk_ptr, png_user_chunk_ptr read_user_chunk_fn));
02055 extern PNG_EXPORT(png_voidp,png_get_user_chunk_ptr) PNGARG((png_structp
02056 png_ptr));
02057 #endif
02058
02059 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
02060
02061
02062
02063 extern PNG_EXPORT(void,png_set_progressive_read_fn) PNGARG((png_structp png_ptr,
02064 png_voidp progressive_ptr,
02065 png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn,
02066 png_progressive_end_ptr end_fn));
02067
02068
02069 extern PNG_EXPORT(png_voidp,png_get_progressive_ptr)
02070 PNGARG((png_structp png_ptr));
02071
02072
02073 extern PNG_EXPORT(void,png_process_data) PNGARG((png_structp png_ptr,
02074 png_infop info_ptr, png_bytep buffer, png_size_t buffer_size));
02075
02076
02077
02078
02079 extern PNG_EXPORT(void,png_progressive_combine_row) PNGARG((png_structp png_ptr,
02080 png_bytep old_row, png_bytep new_row));
02081 #endif
02082
02083 extern PNG_EXPORT(png_voidp,png_malloc) PNGARG((png_structp png_ptr,
02084 png_uint_32 size));
02085
02086 #if defined(PNG_1_0_X)
02087 # define png_malloc_warn png_malloc
02088 #else
02089
02090 extern PNG_EXPORT(png_voidp,png_malloc_warn) PNGARG((png_structp png_ptr,
02091 png_uint_32 size));
02092 #endif
02093
02094
02095 extern PNG_EXPORT(void,png_free) PNGARG((png_structp png_ptr, png_voidp ptr));
02096
02097 #if defined(PNG_1_0_X)
02098
02099 extern PNG_EXPORT(voidpf,png_zalloc) PNGARG((voidpf png_ptr, uInt items,
02100 uInt size));
02101
02102
02103 extern PNG_EXPORT(void,png_zfree) PNGARG((voidpf png_ptr, voidpf ptr));
02104 #endif
02105
02106
02107 extern PNG_EXPORT(void,png_free_data) PNGARG((png_structp png_ptr,
02108 png_infop info_ptr, png_uint_32 free_me, int num));
02109 #ifdef PNG_FREE_ME_SUPPORTED
02110
02111
02112 extern PNG_EXPORT(void,png_data_freer) PNGARG((png_structp png_ptr,
02113 png_infop info_ptr, int freer, png_uint_32 mask));
02114 #endif
02115
02116 #define PNG_DESTROY_WILL_FREE_DATA 1
02117 #define PNG_SET_WILL_FREE_DATA 1
02118 #define PNG_USER_WILL_FREE_DATA 2
02119
02120 #define PNG_FREE_HIST 0x0008
02121 #define PNG_FREE_ICCP 0x0010
02122 #define PNG_FREE_SPLT 0x0020
02123 #define PNG_FREE_ROWS 0x0040
02124 #define PNG_FREE_PCAL 0x0080
02125 #define PNG_FREE_SCAL 0x0100
02126 #define PNG_FREE_UNKN 0x0200
02127 #define PNG_FREE_LIST 0x0400
02128 #define PNG_FREE_PLTE 0x1000
02129 #define PNG_FREE_TRNS 0x2000
02130 #define PNG_FREE_TEXT 0x4000
02131 #define PNG_FREE_ALL 0x7fff
02132 #define PNG_FREE_MUL 0x4220
02133
02134 #ifdef PNG_USER_MEM_SUPPORTED
02135 extern PNG_EXPORT(png_voidp,png_malloc_default) PNGARG((png_structp png_ptr,
02136 png_uint_32 size));
02137 extern PNG_EXPORT(void,png_free_default) PNGARG((png_structp png_ptr,
02138 png_voidp ptr));
02139 #endif
02140
02141 extern PNG_EXPORT(png_voidp,png_memcpy_check) PNGARG((png_structp png_ptr,
02142 png_voidp s1, png_voidp s2, png_uint_32 size));
02143
02144 extern PNG_EXPORT(png_voidp,png_memset_check) PNGARG((png_structp png_ptr,
02145 png_voidp s1, int value, png_uint_32 size));
02146
02147 #if defined(USE_FAR_KEYWORD)
02148 extern void *png_far_to_near PNGARG((png_structp png_ptr,png_voidp ptr,
02149 int check));
02150 #endif
02151
02152 #ifndef PNG_NO_ERROR_TEXT
02153
02154 extern PNG_EXPORT(void,png_error) PNGARG((png_structp png_ptr,
02155 png_const_charp error_message));
02156
02157
02158 extern PNG_EXPORT(void,png_chunk_error) PNGARG((png_structp png_ptr,
02159 png_const_charp error_message));
02160 #else
02161
02162 extern PNG_EXPORT(void,png_err) PNGARG((png_structp png_ptr));
02163 #endif
02164
02165 #ifndef PNG_NO_WARNINGS
02166
02167 extern PNG_EXPORT(void,png_warning) PNGARG((png_structp png_ptr,
02168 png_const_charp warning_message));
02169
02170 #ifdef PNG_READ_SUPPORTED
02171
02172 extern PNG_EXPORT(void,png_chunk_warning) PNGARG((png_structp png_ptr,
02173 png_const_charp warning_message));
02174 #endif
02175 #endif
02176
02177
02178
02179
02180
02181
02182
02183
02184
02185
02186
02187
02188
02189
02190 extern PNG_EXPORT(png_uint_32,png_get_valid) PNGARG((png_structp png_ptr,
02191 png_infop info_ptr, png_uint_32 flag));
02192
02193
02194 extern PNG_EXPORT(png_uint_32,png_get_rowbytes) PNGARG((png_structp png_ptr,
02195 png_infop info_ptr));
02196
02197 #if defined(PNG_INFO_IMAGE_SUPPORTED)
02198
02199
02200 extern PNG_EXPORT(png_bytepp,png_get_rows) PNGARG((png_structp png_ptr,
02201 png_infop info_ptr));
02202
02203
02204 extern PNG_EXPORT(void,png_set_rows) PNGARG((png_structp png_ptr,
02205 png_infop info_ptr, png_bytepp row_pointers));
02206 #endif
02207
02208
02209 extern PNG_EXPORT(png_byte,png_get_channels) PNGARG((png_structp png_ptr,
02210 png_infop info_ptr));
02211
02212 #ifdef PNG_EASY_ACCESS_SUPPORTED
02213
02214 extern PNG_EXPORT(png_uint_32, png_get_image_width) PNGARG((png_structp
02215 png_ptr, png_infop info_ptr));
02216
02217
02218 extern PNG_EXPORT(png_uint_32, png_get_image_height) PNGARG((png_structp
02219 png_ptr, png_infop info_ptr));
02220
02221
02222 extern PNG_EXPORT(png_byte, png_get_bit_depth) PNGARG((png_structp
02223 png_ptr, png_infop info_ptr));
02224
02225
02226 extern PNG_EXPORT(png_byte, png_get_color_type) PNGARG((png_structp
02227 png_ptr, png_infop info_ptr));
02228
02229
02230 extern PNG_EXPORT(png_byte, png_get_filter_type) PNGARG((png_structp
02231 png_ptr, png_infop info_ptr));
02232
02233
02234 extern PNG_EXPORT(png_byte, png_get_interlace_type) PNGARG((png_structp
02235 png_ptr, png_infop info_ptr));
02236
02237
02238 extern PNG_EXPORT(png_byte, png_get_compression_type) PNGARG((png_structp
02239 png_ptr, png_infop info_ptr));
02240
02241
02242 extern PNG_EXPORT(png_uint_32, png_get_pixels_per_meter) PNGARG((png_structp
02243 png_ptr, png_infop info_ptr));
02244 extern PNG_EXPORT(png_uint_32, png_get_x_pixels_per_meter) PNGARG((png_structp
02245 png_ptr, png_infop info_ptr));
02246 extern PNG_EXPORT(png_uint_32, png_get_y_pixels_per_meter) PNGARG((png_structp
02247 png_ptr, png_infop info_ptr));
02248
02249
02250 #ifdef PNG_FLOATING_POINT_SUPPORTED
02251 extern PNG_EXPORT(float, png_get_pixel_aspect_ratio) PNGARG((png_structp
02252 png_ptr, png_infop info_ptr));
02253 #endif
02254
02255
02256 extern PNG_EXPORT(png_int_32, png_get_x_offset_pixels) PNGARG((png_structp
02257 png_ptr, png_infop info_ptr));
02258 extern PNG_EXPORT(png_int_32, png_get_y_offset_pixels) PNGARG((png_structp
02259 png_ptr, png_infop info_ptr));
02260 extern PNG_EXPORT(png_int_32, png_get_x_offset_microns) PNGARG((png_structp
02261 png_ptr, png_infop info_ptr));
02262 extern PNG_EXPORT(png_int_32, png_get_y_offset_microns) PNGARG((png_structp
02263 png_ptr, png_infop info_ptr));
02264
02265 #endif
02266
02267
02268 extern PNG_EXPORT(png_bytep,png_get_signature) PNGARG((png_structp png_ptr,
02269 png_infop info_ptr));
02270
02271 #if defined(PNG_bKGD_SUPPORTED)
02272 extern PNG_EXPORT(png_uint_32,png_get_bKGD) PNGARG((png_structp png_ptr,
02273 png_infop info_ptr, png_color_16p *background));
02274 #endif
02275
02276 #if defined(PNG_bKGD_SUPPORTED)
02277 extern PNG_EXPORT(void,png_set_bKGD) PNGARG((png_structp png_ptr,
02278 png_infop info_ptr, png_color_16p background));
02279 #endif
02280
02281 #if defined(PNG_cHRM_SUPPORTED)
02282 #ifdef PNG_FLOATING_POINT_SUPPORTED
02283 extern PNG_EXPORT(png_uint_32,png_get_cHRM) PNGARG((png_structp png_ptr,
02284 png_infop info_ptr, double *white_x, double *white_y, double *red_x,
02285 double *red_y, double *green_x, double *green_y, double *blue_x,
02286 double *blue_y));
02287 #endif
02288 #ifdef PNG_FIXED_POINT_SUPPORTED
02289 extern PNG_EXPORT(png_uint_32,png_get_cHRM_fixed) PNGARG((png_structp png_ptr,
02290 png_infop info_ptr, png_fixed_point *int_white_x, png_fixed_point
02291 *int_white_y, png_fixed_point *int_red_x, png_fixed_point *int_red_y,
02292 png_fixed_point *int_green_x, png_fixed_point *int_green_y, png_fixed_point
02293 *int_blue_x, png_fixed_point *int_blue_y));
02294 #endif
02295 #endif
02296
02297 #if defined(PNG_cHRM_SUPPORTED)
02298 #ifdef PNG_FLOATING_POINT_SUPPORTED
02299 extern PNG_EXPORT(void,png_set_cHRM) PNGARG((png_structp png_ptr,
02300 png_infop info_ptr, double white_x, double white_y, double red_x,
02301 double red_y, double green_x, double green_y, double blue_x, double blue_y));
02302 #endif
02303 #ifdef PNG_FIXED_POINT_SUPPORTED
02304 extern PNG_EXPORT(void,png_set_cHRM_fixed) PNGARG((png_structp png_ptr,
02305 png_infop info_ptr, png_fixed_point int_white_x, png_fixed_point int_white_y,
02306 png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point
02307 int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x,
02308 png_fixed_point int_blue_y));
02309 #endif
02310 #endif
02311
02312 #if defined(PNG_gAMA_SUPPORTED)
02313 #ifdef PNG_FLOATING_POINT_SUPPORTED
02314 extern PNG_EXPORT(png_uint_32,png_get_gAMA) PNGARG((png_structp png_ptr,
02315 png_infop info_ptr, double *file_gamma));
02316 #endif
02317 extern PNG_EXPORT(png_uint_32,png_get_gAMA_fixed) PNGARG((png_structp png_ptr,
02318 png_infop info_ptr, png_fixed_point *int_file_gamma));
02319 #endif
02320
02321 #if defined(PNG_gAMA_SUPPORTED)
02322 #ifdef PNG_FLOATING_POINT_SUPPORTED
02323 extern PNG_EXPORT(void,png_set_gAMA) PNGARG((png_structp png_ptr,
02324 png_infop info_ptr, double file_gamma));
02325 #endif
02326 extern PNG_EXPORT(void,png_set_gAMA_fixed) PNGARG((png_structp png_ptr,
02327 png_infop info_ptr, png_fixed_point int_file_gamma));
02328 #endif
02329
02330 #if defined(PNG_hIST_SUPPORTED)
02331 extern PNG_EXPORT(png_uint_32,png_get_hIST) PNGARG((png_structp png_ptr,
02332 png_infop info_ptr, png_uint_16p *hist));
02333 #endif
02334
02335 #if defined(PNG_hIST_SUPPORTED)
02336 extern PNG_EXPORT(void,png_set_hIST) PNGARG((png_structp png_ptr,
02337 png_infop info_ptr, png_uint_16p hist));
02338 #endif
02339
02340 extern PNG_EXPORT(png_uint_32,png_get_IHDR) PNGARG((png_structp png_ptr,
02341 png_infop info_ptr, png_uint_32 *width, png_uint_32 *height,
02342 int *bit_depth, int *color_type, int *interlace_method,
02343 int *compression_method, int *filter_method));
02344
02345 extern PNG_EXPORT(void,png_set_IHDR) PNGARG((png_structp png_ptr,
02346 png_infop info_ptr, png_uint_32 width, png_uint_32 height, int bit_depth,
02347 int color_type, int interlace_method, int compression_method,
02348 int filter_method));
02349
02350 #if defined(PNG_oFFs_SUPPORTED)
02351 extern PNG_EXPORT(png_uint_32,png_get_oFFs) PNGARG((png_structp png_ptr,
02352 png_infop info_ptr, png_int_32 *offset_x, png_int_32 *offset_y,
02353 int *unit_type));
02354 #endif
02355
02356 #if defined(PNG_oFFs_SUPPORTED)
02357 extern PNG_EXPORT(void,png_set_oFFs) PNGARG((png_structp png_ptr,
02358 png_infop info_ptr, png_int_32 offset_x, png_int_32 offset_y,
02359 int unit_type));
02360 #endif
02361
02362 #if defined(PNG_pCAL_SUPPORTED)
02363 extern PNG_EXPORT(png_uint_32,png_get_pCAL) PNGARG((png_structp png_ptr,
02364 png_infop info_ptr, png_charp *purpose, png_int_32 *X0, png_int_32 *X1,
02365 int *type, int *nparams, png_charp *units, png_charpp *params));
02366 #endif
02367
02368 #if defined(PNG_pCAL_SUPPORTED)
02369 extern PNG_EXPORT(void,png_set_pCAL) PNGARG((png_structp png_ptr,
02370 png_infop info_ptr, png_charp purpose, png_int_32 X0, png_int_32 X1,
02371 int type, int nparams, png_charp units, png_charpp params));
02372 #endif
02373
02374 #if defined(PNG_pHYs_SUPPORTED)
02375 extern PNG_EXPORT(png_uint_32,png_get_pHYs) PNGARG((png_structp png_ptr,
02376 png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type));
02377 #endif
02378
02379 #if defined(PNG_pHYs_SUPPORTED)
02380 extern PNG_EXPORT(void,png_set_pHYs) PNGARG((png_structp png_ptr,
02381 png_infop info_ptr, png_uint_32 res_x, png_uint_32 res_y, int unit_type));
02382 #endif
02383
02384 extern PNG_EXPORT(png_uint_32,png_get_PLTE) PNGARG((png_structp png_ptr,
02385 png_infop info_ptr, png_colorp *palette, int *num_palette));
02386
02387 extern PNG_EXPORT(void,png_set_PLTE) PNGARG((png_structp png_ptr,
02388 png_infop info_ptr, png_colorp palette, int num_palette));
02389
02390 #if defined(PNG_sBIT_SUPPORTED)
02391 extern PNG_EXPORT(png_uint_32,png_get_sBIT) PNGARG((png_structp png_ptr,
02392 png_infop info_ptr, png_color_8p *sig_bit));
02393 #endif
02394
02395 #if defined(PNG_sBIT_SUPPORTED)
02396 extern PNG_EXPORT(void,png_set_sBIT) PNGARG((png_structp png_ptr,
02397 png_infop info_ptr, png_color_8p sig_bit));
02398 #endif
02399
02400 #if defined(PNG_sRGB_SUPPORTED)
02401 extern PNG_EXPORT(png_uint_32,png_get_sRGB) PNGARG((png_structp png_ptr,
02402 png_infop info_ptr, int *intent));
02403 #endif
02404
02405 #if defined(PNG_sRGB_SUPPORTED)
02406 extern PNG_EXPORT(void,png_set_sRGB) PNGARG((png_structp png_ptr,
02407 png_infop info_ptr, int intent));
02408 extern PNG_EXPORT(void,png_set_sRGB_gAMA_and_cHRM) PNGARG((png_structp png_ptr,
02409 png_infop info_ptr, int intent));
02410 #endif
02411
02412 #if defined(PNG_iCCP_SUPPORTED)
02413 extern PNG_EXPORT(png_uint_32,png_get_iCCP) PNGARG((png_structp png_ptr,
02414 png_infop info_ptr, png_charpp name, int *compression_type,
02415 png_charpp profile, png_uint_32 *proflen));
02416
02417 #endif
02418
02419 #if defined(PNG_iCCP_SUPPORTED)
02420 extern PNG_EXPORT(void,png_set_iCCP) PNGARG((png_structp png_ptr,
02421 png_infop info_ptr, png_charp name, int compression_type,
02422 png_charp profile, png_uint_32 proflen));
02423
02424 #endif
02425
02426 #if defined(PNG_sPLT_SUPPORTED)
02427 extern PNG_EXPORT(png_uint_32,png_get_sPLT) PNGARG((png_structp png_ptr,
02428 png_infop info_ptr, png_sPLT_tpp entries));
02429 #endif
02430
02431 #if defined(PNG_sPLT_SUPPORTED)
02432 extern PNG_EXPORT(void,png_set_sPLT) PNGARG((png_structp png_ptr,
02433 png_infop info_ptr, png_sPLT_tp entries, int nentries));
02434 #endif
02435
02436 #if defined(PNG_TEXT_SUPPORTED)
02437
02438 extern PNG_EXPORT(png_uint_32,png_get_text) PNGARG((png_structp png_ptr,
02439 png_infop info_ptr, png_textp *text_ptr, int *num_text));
02440 #endif
02441
02442
02443
02444
02445
02446
02447
02448
02449
02450 #if defined(PNG_TEXT_SUPPORTED)
02451 extern PNG_EXPORT(void,png_set_text) PNGARG((png_structp png_ptr,
02452 png_infop info_ptr, png_textp text_ptr, int num_text));
02453 #endif
02454
02455 #if defined(PNG_tIME_SUPPORTED)
02456 extern PNG_EXPORT(png_uint_32,png_get_tIME) PNGARG((png_structp png_ptr,
02457 png_infop info_ptr, png_timep *mod_time));
02458 #endif
02459
02460 #if defined(PNG_tIME_SUPPORTED)
02461 extern PNG_EXPORT(void,png_set_tIME) PNGARG((png_structp png_ptr,
02462 png_infop info_ptr, png_timep mod_time));
02463 #endif
02464
02465 #if defined(PNG_tRNS_SUPPORTED)
02466 extern PNG_EXPORT(png_uint_32,png_get_tRNS) PNGARG((png_structp png_ptr,
02467 png_infop info_ptr, png_bytep *trans, int *num_trans,
02468 png_color_16p *trans_values));
02469 #endif
02470
02471 #if defined(PNG_tRNS_SUPPORTED)
02472 extern PNG_EXPORT(void,png_set_tRNS) PNGARG((png_structp png_ptr,
02473 png_infop info_ptr, png_bytep trans, int num_trans,
02474 png_color_16p trans_values));
02475 #endif
02476
02477 #if defined(PNG_tRNS_SUPPORTED)
02478 #endif
02479
02480 #if defined(PNG_sCAL_SUPPORTED)
02481 #ifdef PNG_FLOATING_POINT_SUPPORTED
02482 extern PNG_EXPORT(png_uint_32,png_get_sCAL) PNGARG((png_structp png_ptr,
02483 png_infop info_ptr, int *unit, double *width, double *height));
02484 #else
02485 #ifdef PNG_FIXED_POINT_SUPPORTED
02486 extern PNG_EXPORT(png_uint_32,png_get_sCAL_s) PNGARG((png_structp png_ptr,
02487 png_infop info_ptr, int *unit, png_charpp swidth, png_charpp sheight));
02488 #endif
02489 #endif
02490 #endif
02491
02492 #if defined(PNG_sCAL_SUPPORTED)
02493 #ifdef PNG_FLOATING_POINT_SUPPORTED
02494 extern PNG_EXPORT(void,png_set_sCAL) PNGARG((png_structp png_ptr,
02495 png_infop info_ptr, int unit, double width, double height));
02496 #else
02497 #ifdef PNG_FIXED_POINT_SUPPORTED
02498 extern PNG_EXPORT(void,png_set_sCAL_s) PNGARG((png_structp png_ptr,
02499 png_infop info_ptr, int unit, png_charp swidth, png_charp sheight));
02500 #endif
02501 #endif
02502 #endif
02503
02504 #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
02505
02506
02507
02508
02509
02510
02511
02512
02513
02514 extern PNG_EXPORT(void, png_set_keep_unknown_chunks) PNGARG((png_structp
02515 png_ptr, int keep, png_bytep chunk_list, int num_chunks));
02516 extern PNG_EXPORT(void, png_set_unknown_chunks) PNGARG((png_structp png_ptr,
02517 png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns));
02518 extern PNG_EXPORT(void, png_set_unknown_chunk_location)
02519 PNGARG((png_structp png_ptr, png_infop info_ptr, int chunk, int location));
02520 extern PNG_EXPORT(png_uint_32,png_get_unknown_chunks) PNGARG((png_structp
02521 png_ptr, png_infop info_ptr, png_unknown_chunkpp entries));
02522 #endif
02523 #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
02524 PNG_EXPORT(int,png_handle_as_unknown) PNGARG((png_structp png_ptr, png_bytep
02525 chunk_name));
02526 #endif
02527
02528
02529
02530
02531 extern PNG_EXPORT(void, png_set_invalid) PNGARG((png_structp png_ptr,
02532 png_infop info_ptr, int mask));
02533
02534 #if defined(PNG_INFO_IMAGE_SUPPORTED)
02535
02536 extern PNG_EXPORT(void, png_read_png) PNGARG((png_structp png_ptr,
02537 png_infop info_ptr,
02538 int transforms,
02539 png_voidp params));
02540 extern PNG_EXPORT(void, png_write_png) PNGARG((png_structp png_ptr,
02541 png_infop info_ptr,
02542 int transforms,
02543 png_voidp params));
02544 #endif
02545
02546
02547
02548
02549
02550
02551 #ifdef PNG_DEBUG
02552 #if (PNG_DEBUG > 0)
02553 #if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
02554 #include <crtdbg.h>
02555 #if (PNG_DEBUG > 1)
02556 #ifndef _DEBUG
02557 # define _DEBUG
02558 #endif
02559 #ifndef png_debug
02560 #define png_debug(l,m) _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)
02561 #endif
02562 #ifndef png_debug1
02563 #define png_debug1(l,m,p1) _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)
02564 #endif
02565 #ifndef png_debug2
02566 #define png_debug2(l,m,p1,p2) _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)
02567 #endif
02568 #endif
02569 #else
02570 #ifndef PNG_DEBUG_FILE
02571 #define PNG_DEBUG_FILE stderr
02572 #endif
02573
02574 #if (PNG_DEBUG > 1)
02575
02576
02577 # ifdef __STDC__
02578 # ifndef png_debug
02579 # define png_debug(l,m) \
02580 { \
02581 int num_tabs=l; \
02582 fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
02583 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
02584 }
02585 # endif
02586 # ifndef png_debug1
02587 # define png_debug1(l,m,p1) \
02588 { \
02589 int num_tabs=l; \
02590 fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
02591 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
02592 }
02593 # endif
02594 # ifndef png_debug2
02595 # define png_debug2(l,m,p1,p2) \
02596 { \
02597 int num_tabs=l; \
02598 fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
02599 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
02600 }
02601 # endif
02602 # else
02603 # ifndef png_debug
02604 # define png_debug(l,m) \
02605 { \
02606 int num_tabs=l; \
02607 char format[256]; \
02608 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
02609 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
02610 m,PNG_STRING_NEWLINE); \
02611 fprintf(PNG_DEBUG_FILE,format); \
02612 }
02613 # endif
02614 # ifndef png_debug1
02615 # define png_debug1(l,m,p1) \
02616 { \
02617 int num_tabs=l; \
02618 char format[256]; \
02619 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
02620 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
02621 m,PNG_STRING_NEWLINE); \
02622 fprintf(PNG_DEBUG_FILE,format,p1); \
02623 }
02624 # endif
02625 # ifndef png_debug2
02626 # define png_debug2(l,m,p1,p2) \
02627 { \
02628 int num_tabs=l; \
02629 char format[256]; \
02630 snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
02631 (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
02632 m,PNG_STRING_NEWLINE); \
02633 fprintf(PNG_DEBUG_FILE,format,p1,p2); \
02634 }
02635 # endif
02636 # endif
02637 #endif
02638
02639 #endif
02640 #endif
02641 #endif
02642 #ifndef png_debug
02643 #define png_debug(l, m)
02644 #endif
02645 #ifndef png_debug1
02646 #define png_debug1(l, m, p1)
02647 #endif
02648 #ifndef png_debug2
02649 #define png_debug2(l, m, p1, p2)
02650 #endif
02651
02652 extern PNG_EXPORT(png_charp,png_get_copyright) PNGARG((png_structp png_ptr));
02653 extern PNG_EXPORT(png_charp,png_get_header_ver) PNGARG((png_structp png_ptr));
02654 extern PNG_EXPORT(png_charp,png_get_header_version) PNGARG((png_structp png_ptr));
02655 extern PNG_EXPORT(png_charp,png_get_libpng_ver) PNGARG((png_structp png_ptr));
02656
02657 #ifdef PNG_MNG_FEATURES_SUPPORTED
02658 extern PNG_EXPORT(png_uint_32,png_permit_mng_features) PNGARG((png_structp
02659 png_ptr, png_uint_32 mng_features_permitted));
02660 #endif
02661
02662
02663 #define PNG_HANDLE_CHUNK_AS_DEFAULT 0
02664 #define PNG_HANDLE_CHUNK_NEVER 1
02665 #define PNG_HANDLE_CHUNK_IF_SAFE 2
02666 #define PNG_HANDLE_CHUNK_ALWAYS 3
02667
02668
02669 #if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
02670 #if defined(PNG_MMX_CODE_SUPPORTED)
02671 #define PNG_ASM_FLAG_MMX_SUPPORT_COMPILED 0x01
02672 #define PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU 0x02
02673 #define PNG_ASM_FLAG_MMX_READ_COMBINE_ROW 0x04
02674 #define PNG_ASM_FLAG_MMX_READ_INTERLACE 0x08
02675 #define PNG_ASM_FLAG_MMX_READ_FILTER_SUB 0x10
02676 #define PNG_ASM_FLAG_MMX_READ_FILTER_UP 0x20
02677 #define PNG_ASM_FLAG_MMX_READ_FILTER_AVG 0x40
02678 #define PNG_ASM_FLAG_MMX_READ_FILTER_PAETH 0x80
02679 #define PNG_ASM_FLAGS_INITIALIZED 0x80000000
02680
02681 #define PNG_MMX_READ_FLAGS ( PNG_ASM_FLAG_MMX_READ_COMBINE_ROW \
02682 | PNG_ASM_FLAG_MMX_READ_INTERLACE \
02683 | PNG_ASM_FLAG_MMX_READ_FILTER_SUB \
02684 | PNG_ASM_FLAG_MMX_READ_FILTER_UP \
02685 | PNG_ASM_FLAG_MMX_READ_FILTER_AVG \
02686 | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH )
02687 #define PNG_MMX_WRITE_FLAGS ( 0 )
02688
02689 #define PNG_MMX_FLAGS ( PNG_ASM_FLAG_MMX_SUPPORT_COMPILED \
02690 | PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU \
02691 | PNG_MMX_READ_FLAGS \
02692 | PNG_MMX_WRITE_FLAGS )
02693
02694 #define PNG_SELECT_READ 1
02695 #define PNG_SELECT_WRITE 2
02696 #endif
02697
02698 #if !defined(PNG_1_0_X)
02699
02700 extern PNG_EXPORT(png_uint_32,png_get_mmx_flagmask)
02701 PNGARG((int flag_select, int *compilerID));
02702
02703
02704 extern PNG_EXPORT(png_uint_32,png_get_asm_flagmask)
02705 PNGARG((int flag_select));
02706
02707
02708 extern PNG_EXPORT(png_uint_32,png_get_asm_flags)
02709 PNGARG((png_structp png_ptr));
02710
02711
02712 extern PNG_EXPORT(png_byte,png_get_mmx_bitdepth_threshold)
02713 PNGARG((png_structp png_ptr));
02714
02715
02716 extern PNG_EXPORT(png_uint_32,png_get_mmx_rowbytes_threshold)
02717 PNGARG((png_structp png_ptr));
02718
02719
02720 extern PNG_EXPORT(void,png_set_asm_flags)
02721 PNGARG((png_structp png_ptr, png_uint_32 asm_flags));
02722
02723
02724 extern PNG_EXPORT(void,png_set_mmx_thresholds)
02725 PNGARG((png_structp png_ptr, png_byte mmx_bitdepth_threshold,
02726 png_uint_32 mmx_rowbytes_threshold));
02727
02728 #endif
02729
02730 #if !defined(PNG_1_0_X)
02731
02732 extern PNG_EXPORT(int,png_mmx_support) PNGARG((void));
02733 #endif
02734 #endif
02735
02736
02737
02738 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
02739 extern PNG_EXPORT(void,png_set_strip_error_numbers) PNGARG((png_structp
02740 png_ptr, png_uint_32 strip_mode));
02741 #endif
02742
02743
02744 #ifdef PNG_SET_USER_LIMITS_SUPPORTED
02745 extern PNG_EXPORT(void,png_set_user_limits) PNGARG((png_structp
02746 png_ptr, png_uint_32 user_width_max, png_uint_32 user_height_max));
02747 extern PNG_EXPORT(png_uint_32,png_get_user_width_max) PNGARG((png_structp
02748 png_ptr));
02749 extern PNG_EXPORT(png_uint_32,png_get_user_height_max) PNGARG((png_structp
02750 png_ptr));
02751 #endif
02752
02753
02754
02755
02756 #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
02757
02758
02759
02760
02761
02762
02763
02764
02765
02766
02767
02768
02769
02770
02771 # define png_composite(composite, fg, alpha, bg) \
02772 { png_uint_16 temp = (png_uint_16)((png_uint_16)(fg) * (png_uint_16)(alpha) \
02773 + (png_uint_16)(bg)*(png_uint_16)(255 - \
02774 (png_uint_16)(alpha)) + (png_uint_16)128); \
02775 (composite) = (png_byte)((temp + (temp >> 8)) >> 8); }
02776
02777 # define png_composite_16(composite, fg, alpha, bg) \
02778 { png_uint_32 temp = (png_uint_32)((png_uint_32)(fg) * (png_uint_32)(alpha) \
02779 + (png_uint_32)(bg)*(png_uint_32)(65535L - \
02780 (png_uint_32)(alpha)) + (png_uint_32)32768L); \
02781 (composite) = (png_uint_16)((temp + (temp >> 16)) >> 16); }
02782
02783 #else
02784
02785 # define png_composite(composite, fg, alpha, bg) \
02786 (composite) = (png_byte)(((png_uint_16)(fg) * (png_uint_16)(alpha) + \
02787 (png_uint_16)(bg) * (png_uint_16)(255 - (png_uint_16)(alpha)) + \
02788 (png_uint_16)127) / 255)
02789
02790 # define png_composite_16(composite, fg, alpha, bg) \
02791 (composite) = (png_uint_16)(((png_uint_32)(fg) * (png_uint_32)(alpha) + \
02792 (png_uint_32)(bg)*(png_uint_32)(65535L - (png_uint_32)(alpha)) + \
02793 (png_uint_32)32767) / (png_uint_32)65535L)
02794
02795 #endif
02796
02797
02798
02799
02800
02801
02802
02803
02804
02805 #if defined(PNG_READ_BIG_ENDIAN_SUPPORTED)
02806 # define png_get_uint_32(buf) ( *((png_uint_32p) (buf)))
02807 # define png_get_uint_16(buf) ( *((png_uint_16p) (buf)))
02808 # define png_get_int_32(buf) ( *((png_int_32p) (buf)))
02809 #else
02810 extern PNG_EXPORT(png_uint_32,png_get_uint_32) PNGARG((png_bytep buf));
02811 extern PNG_EXPORT(png_uint_16,png_get_uint_16) PNGARG((png_bytep buf));
02812 extern PNG_EXPORT(png_int_32,png_get_int_32) PNGARG((png_bytep buf));
02813 #endif
02814 extern PNG_EXPORT(png_uint_32,png_get_uint_31)
02815 PNGARG((png_structp png_ptr, png_bytep buf));
02816
02817
02818
02819
02820 extern PNG_EXPORT(void,png_save_uint_32)
02821 PNGARG((png_bytep buf, png_uint_32 i));
02822 extern PNG_EXPORT(void,png_save_int_32)
02823 PNGARG((png_bytep buf, png_int_32 i));
02824
02825
02826
02827
02828
02829 extern PNG_EXPORT(void,png_save_uint_16)
02830 PNGARG((png_bytep buf, unsigned int i));
02831
02832
02833
02834
02835
02836
02837
02838
02839
02840
02841
02842
02843
02844
02845 #define PNG_HAVE_IHDR 0x01
02846 #define PNG_HAVE_PLTE 0x02
02847 #define PNG_HAVE_IDAT 0x04
02848 #define PNG_AFTER_IDAT 0x08
02849 #define PNG_HAVE_IEND 0x10
02850
02851 #if defined(PNG_INTERNAL)
02852
02853
02854
02855
02856 #define PNG_HAVE_gAMA 0x20
02857 #define PNG_HAVE_cHRM 0x40
02858 #define PNG_HAVE_sRGB 0x80
02859 #define PNG_HAVE_CHUNK_HEADER 0x100
02860 #define PNG_WROTE_tIME 0x200
02861 #define PNG_WROTE_INFO_BEFORE_PLTE 0x400
02862 #define PNG_BACKGROUND_IS_GRAY 0x800
02863 #define PNG_HAVE_PNG_SIGNATURE 0x1000
02864 #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000
02865
02866
02867 #define PNG_BGR 0x0001
02868 #define PNG_INTERLACE 0x0002
02869 #define PNG_PACK 0x0004
02870 #define PNG_SHIFT 0x0008
02871 #define PNG_SWAP_BYTES 0x0010
02872 #define PNG_INVERT_MONO 0x0020
02873 #define PNG_DITHER 0x0040
02874 #define PNG_BACKGROUND 0x0080
02875 #define PNG_BACKGROUND_EXPAND 0x0100
02876
02877 #define PNG_16_TO_8 0x0400
02878 #define PNG_RGBA 0x0800
02879 #define PNG_EXPAND 0x1000
02880 #define PNG_GAMMA 0x2000
02881 #define PNG_GRAY_TO_RGB 0x4000
02882 #define PNG_FILLER 0x8000L
02883 #define PNG_PACKSWAP 0x10000L
02884 #define PNG_SWAP_ALPHA 0x20000L
02885 #define PNG_STRIP_ALPHA 0x40000L
02886 #define PNG_INVERT_ALPHA 0x80000L
02887 #define PNG_USER_TRANSFORM 0x100000L
02888 #define PNG_RGB_TO_GRAY_ERR 0x200000L
02889 #define PNG_RGB_TO_GRAY_WARN 0x400000L
02890 #define PNG_RGB_TO_GRAY 0x600000L
02891
02892 #define PNG_ADD_ALPHA 0x1000000L
02893 #define PNG_EXPAND_tRNS 0x2000000L
02894
02895
02896
02897
02898
02899
02900
02901 #define PNG_STRUCT_PNG 0x0001
02902 #define PNG_STRUCT_INFO 0x0002
02903
02904
02905 #define PNG_WEIGHT_SHIFT 8
02906 #define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT))
02907 #define PNG_COST_SHIFT 3
02908 #define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT))
02909
02910
02911 #define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001
02912 #define PNG_FLAG_ZLIB_CUSTOM_LEVEL 0x0002
02913 #define PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL 0x0004
02914 #define PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS 0x0008
02915 #define PNG_FLAG_ZLIB_CUSTOM_METHOD 0x0010
02916 #define PNG_FLAG_ZLIB_FINISHED 0x0020
02917 #define PNG_FLAG_ROW_INIT 0x0040
02918 #define PNG_FLAG_FILLER_AFTER 0x0080
02919 #define PNG_FLAG_CRC_ANCILLARY_USE 0x0100
02920 #define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200
02921 #define PNG_FLAG_CRC_CRITICAL_USE 0x0400
02922 #define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800
02923 #define PNG_FLAG_FREE_PLTE 0x1000
02924 #define PNG_FLAG_FREE_TRNS 0x2000
02925 #define PNG_FLAG_FREE_HIST 0x4000
02926 #define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000L
02927 #define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000L
02928 #define PNG_FLAG_LIBRARY_MISMATCH 0x20000L
02929 #define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000L
02930 #define PNG_FLAG_STRIP_ERROR_TEXT 0x80000L
02931 #define PNG_FLAG_MALLOC_NULL_MEM_OK 0x100000L
02932 #define PNG_FLAG_ADD_ALPHA 0x200000L
02933 #define PNG_FLAG_STRIP_ALPHA 0x400000L
02934
02935
02936
02937
02938
02939
02940
02941
02942
02943 #define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \
02944 PNG_FLAG_CRC_ANCILLARY_NOWARN)
02945
02946 #define PNG_FLAG_CRC_CRITICAL_MASK (PNG_FLAG_CRC_CRITICAL_USE | \
02947 PNG_FLAG_CRC_CRITICAL_IGNORE)
02948
02949 #define PNG_FLAG_CRC_MASK (PNG_FLAG_CRC_ANCILLARY_MASK | \
02950 PNG_FLAG_CRC_CRITICAL_MASK)
02951
02952
02953
02954 #define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \
02955 abs((int)((c1).green) - (int)((c2).green)) + \
02956 abs((int)((c1).blue) - (int)((c2).blue)))
02957
02958
02959 #define PNG_ROWBYTES(pixel_bits, width) \
02960 ((pixel_bits) >= 8 ? \
02961 ((width) * (((png_uint_32)(pixel_bits)) >> 3)) : \
02962 (( ((width) * ((png_uint_32)(pixel_bits))) + 7) >> 3) )
02963
02964
02965
02966
02967
02968 #define PNG_OUT_OF_RANGE(value, ideal, delta) \
02969 ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) )
02970
02971
02972 #if !defined(PNG_NO_EXTERN) || defined(PNG_ALWAYS_EXTERN)
02973
02974 #ifdef PNG_USE_GLOBAL_ARRAYS
02975 PNG_EXPORT_VAR (PNG_CONST png_byte FARDATA) png_sig[8];
02976 #else
02977 #endif
02978 #endif
02979
02980
02981
02982
02983
02984 #define PNG_IHDR png_byte png_IHDR[5] = { 73, 72, 68, 82, '\0'}
02985 #define PNG_IDAT png_byte png_IDAT[5] = { 73, 68, 65, 84, '\0'}
02986 #define PNG_IEND png_byte png_IEND[5] = { 73, 69, 78, 68, '\0'}
02987 #define PNG_PLTE png_byte png_PLTE[5] = { 80, 76, 84, 69, '\0'}
02988 #define PNG_bKGD png_byte png_bKGD[5] = { 98, 75, 71, 68, '\0'}
02989 #define PNG_cHRM png_byte png_cHRM[5] = { 99, 72, 82, 77, '\0'}
02990 #define PNG_gAMA png_byte png_gAMA[5] = {103, 65, 77, 65, '\0'}
02991 #define PNG_hIST png_byte png_hIST[5] = {104, 73, 83, 84, '\0'}
02992 #define PNG_iCCP png_byte png_iCCP[5] = {105, 67, 67, 80, '\0'}
02993 #define PNG_iTXt png_byte png_iTXt[5] = {105, 84, 88, 116, '\0'}
02994 #define PNG_oFFs png_byte png_oFFs[5] = {111, 70, 70, 115, '\0'}
02995 #define PNG_pCAL png_byte png_pCAL[5] = {112, 67, 65, 76, '\0'}
02996 #define PNG_sCAL png_byte png_sCAL[5] = {115, 67, 65, 76, '\0'}
02997 #define PNG_pHYs png_byte png_pHYs[5] = {112, 72, 89, 115, '\0'}
02998 #define PNG_sBIT png_byte png_sBIT[5] = {115, 66, 73, 84, '\0'}
02999 #define PNG_sPLT png_byte png_sPLT[5] = {115, 80, 76, 84, '\0'}
03000 #define PNG_sRGB png_byte png_sRGB[5] = {115, 82, 71, 66, '\0'}
03001 #define PNG_tEXt png_byte png_tEXt[5] = {116, 69, 88, 116, '\0'}
03002 #define PNG_tIME png_byte png_tIME[5] = {116, 73, 77, 69, '\0'}
03003 #define PNG_tRNS png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'}
03004 #define PNG_zTXt png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'}
03005
03006 #ifdef PNG_USE_GLOBAL_ARRAYS
03007 PNG_EXPORT_VAR (png_byte FARDATA) png_IHDR[5];
03008 PNG_EXPORT_VAR (png_byte FARDATA) png_IDAT[5];
03009 PNG_EXPORT_VAR (png_byte FARDATA) png_IEND[5];
03010 PNG_EXPORT_VAR (png_byte FARDATA) png_PLTE[5];
03011 PNG_EXPORT_VAR (png_byte FARDATA) png_bKGD[5];
03012 PNG_EXPORT_VAR (png_byte FARDATA) png_cHRM[5];
03013 PNG_EXPORT_VAR (png_byte FARDATA) png_gAMA[5];
03014 PNG_EXPORT_VAR (png_byte FARDATA) png_hIST[5];
03015 PNG_EXPORT_VAR (png_byte FARDATA) png_iCCP[5];
03016 PNG_EXPORT_VAR (png_byte FARDATA) png_iTXt[5];
03017 PNG_EXPORT_VAR (png_byte FARDATA) png_oFFs[5];
03018 PNG_EXPORT_VAR (png_byte FARDATA) png_pCAL[5];
03019 PNG_EXPORT_VAR (png_byte FARDATA) png_sCAL[5];
03020 PNG_EXPORT_VAR (png_byte FARDATA) png_pHYs[5];
03021 PNG_EXPORT_VAR (png_byte FARDATA) png_sBIT[5];
03022 PNG_EXPORT_VAR (png_byte FARDATA) png_sPLT[5];
03023 PNG_EXPORT_VAR (png_byte FARDATA) png_sRGB[5];
03024 PNG_EXPORT_VAR (png_byte FARDATA) png_tEXt[5];
03025 PNG_EXPORT_VAR (png_byte FARDATA) png_tIME[5];
03026 PNG_EXPORT_VAR (png_byte FARDATA) png_tRNS[5];
03027 PNG_EXPORT_VAR (png_byte FARDATA) png_zTXt[5];
03028 #endif
03029
03030 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
03031
03032
03033
03034 extern PNG_EXPORT(void,png_read_init) PNGARG((png_structp png_ptr));
03035 #undef png_read_init
03036 #define png_read_init(png_ptr) png_read_init_3(&png_ptr, \
03037 PNG_LIBPNG_VER_STRING, png_sizeof(png_struct));
03038 #endif
03039
03040 extern PNG_EXPORT(void,png_read_init_3) PNGARG((png_structpp ptr_ptr,
03041 png_const_charp user_png_ver, png_size_t png_struct_size));
03042 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
03043 extern PNG_EXPORT(void,png_read_init_2) PNGARG((png_structp png_ptr,
03044 png_const_charp user_png_ver, png_size_t png_struct_size, png_size_t
03045 png_info_size));
03046 #endif
03047
03048 #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
03049
03050
03051
03052 extern PNG_EXPORT(void,png_write_init) PNGARG((png_structp png_ptr));
03053 #undef png_write_init
03054 #define png_write_init(png_ptr) png_write_init_3(&png_ptr, \
03055 PNG_LIBPNG_VER_STRING, png_sizeof(png_struct));
03056 #endif
03057
03058 extern PNG_EXPORT(void,png_write_init_3) PNGARG((png_structpp ptr_ptr,
03059 png_const_charp user_png_ver, png_size_t png_struct_size));
03060 extern PNG_EXPORT(void,png_write_init_2) PNGARG((png_structp png_ptr,
03061 png_const_charp user_png_ver, png_size_t png_struct_size, png_size_t
03062 png_info_size));
03063
03064
03065 PNG_EXTERN png_voidp png_create_struct PNGARG((int type));
03066
03067
03068 PNG_EXTERN void png_destroy_struct PNGARG((png_voidp struct_ptr));
03069
03070 PNG_EXTERN png_voidp png_create_struct_2 PNGARG((int type, png_malloc_ptr
03071 malloc_fn, png_voidp mem_ptr));
03072 PNG_EXTERN void png_destroy_struct_2 PNGARG((png_voidp struct_ptr,
03073 png_free_ptr free_fn, png_voidp mem_ptr));
03074
03075
03076 PNG_EXTERN void png_info_destroy PNGARG((png_structp png_ptr,
03077 png_infop info_ptr));
03078
03079 #ifndef PNG_1_0_X
03080
03081 PNG_EXTERN voidpf png_zalloc PNGARG((voidpf png_ptr, uInt items, uInt size));
03082
03083
03084 PNG_EXTERN void png_zfree PNGARG((voidpf png_ptr, voidpf ptr));
03085
03086 #ifdef PNG_SIZE_T
03087
03088 PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size));
03089 #endif
03090
03091
03092
03093
03094 PNG_EXTERN void PNGAPI png_default_read_data PNGARG((png_structp png_ptr,
03095 png_bytep data, png_size_t length));
03096
03097 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
03098 PNG_EXTERN void PNGAPI png_push_fill_buffer PNGARG((png_structp png_ptr,
03099 png_bytep buffer, png_size_t length));
03100 #endif
03101
03102 PNG_EXTERN void PNGAPI png_default_write_data PNGARG((png_structp png_ptr,
03103 png_bytep data, png_size_t length));
03104
03105 #if defined(PNG_WRITE_FLUSH_SUPPORTED)
03106 #if !defined(PNG_NO_STDIO)
03107 PNG_EXTERN void PNGAPI png_default_flush PNGARG((png_structp png_ptr));
03108 #endif
03109 #endif
03110 #else
03111 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
03112 PNG_EXTERN void png_push_fill_buffer PNGARG((png_structp png_ptr,
03113 png_bytep buffer, png_size_t length));
03114 #endif
03115 #endif
03116
03117
03118 PNG_EXTERN void png_reset_crc PNGARG((png_structp png_ptr));
03119
03120
03121 PNG_EXTERN void png_write_data PNGARG((png_structp png_ptr, png_bytep data,
03122 png_size_t length));
03123
03124
03125 PNG_EXTERN void png_read_data PNGARG((png_structp png_ptr, png_bytep data,
03126 png_size_t length));
03127
03128
03129 PNG_EXTERN void png_crc_read PNGARG((png_structp png_ptr, png_bytep buf,
03130 png_size_t length));
03131
03132
03133 #if defined(PNG_zTXt_SUPPORTED) || defined(PNG_iTXt_SUPPORTED) || \
03134 defined(PNG_iCCP_SUPPORTED) || defined(PNG_sPLT_SUPPORTED)
03135 PNG_EXTERN void png_decompress_chunk PNGARG((png_structp png_ptr,
03136 int comp_type, png_size_t chunklength,
03137 png_size_t prefix_length, png_size_t *data_length));
03138 #endif
03139
03140
03141 PNG_EXTERN int png_crc_finish PNGARG((png_structp png_ptr, png_uint_32 skip));
03142
03143
03144 PNG_EXTERN int png_crc_error PNGARG((png_structp png_ptr));
03145
03146
03147
03148
03149
03150 PNG_EXTERN void png_calculate_crc PNGARG((png_structp png_ptr, png_bytep ptr,
03151 png_size_t length));
03152
03153 #if defined(PNG_WRITE_FLUSH_SUPPORTED)
03154 PNG_EXTERN void png_flush PNGARG((png_structp png_ptr));
03155 #endif
03156
03157
03158 PNG_EXTERN void png_write_sig PNGARG((png_structp png_ptr));
03159
03160
03161
03162
03163
03164
03165 PNG_EXTERN void png_write_IHDR PNGARG((png_structp png_ptr, png_uint_32 width,
03166 png_uint_32 height,
03167 int bit_depth, int color_type, int compression_method, int filter_method,
03168 int interlace_method));
03169
03170 PNG_EXTERN void png_write_PLTE PNGARG((png_structp png_ptr, png_colorp palette,
03171 png_uint_32 num_pal));
03172
03173 PNG_EXTERN void png_write_IDAT PNGARG((png_structp png_ptr, png_bytep data,
03174 png_size_t length));
03175
03176 PNG_EXTERN void png_write_IEND PNGARG((png_structp png_ptr));
03177
03178 #if defined(PNG_WRITE_gAMA_SUPPORTED)
03179 #ifdef PNG_FLOATING_POINT_SUPPORTED
03180 PNG_EXTERN void png_write_gAMA PNGARG((png_structp png_ptr, double file_gamma));
03181 #endif
03182 #ifdef PNG_FIXED_POINT_SUPPORTED
03183 PNG_EXTERN void png_write_gAMA_fixed PNGARG((png_structp png_ptr, png_fixed_point
03184 file_gamma));
03185 #endif
03186 #endif
03187
03188 #if defined(PNG_WRITE_sBIT_SUPPORTED)
03189 PNG_EXTERN void png_write_sBIT PNGARG((png_structp png_ptr, png_color_8p sbit,
03190 int color_type));
03191 #endif
03192
03193 #if defined(PNG_WRITE_cHRM_SUPPORTED)
03194 #ifdef PNG_FLOATING_POINT_SUPPORTED
03195 PNG_EXTERN void png_write_cHRM PNGARG((png_structp png_ptr,
03196 double white_x, double white_y,
03197 double red_x, double red_y, double green_x, double green_y,
03198 double blue_x, double blue_y));
03199 #endif
03200 #ifdef PNG_FIXED_POINT_SUPPORTED
03201 PNG_EXTERN void png_write_cHRM_fixed PNGARG((png_structp png_ptr,
03202 png_fixed_point int_white_x, png_fixed_point int_white_y,
03203 png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point
03204 int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x,
03205 png_fixed_point int_blue_y));
03206 #endif
03207 #endif
03208
03209 #if defined(PNG_WRITE_sRGB_SUPPORTED)
03210 PNG_EXTERN void png_write_sRGB PNGARG((png_structp png_ptr,
03211 int intent));
03212 #endif
03213
03214 #if defined(PNG_WRITE_iCCP_SUPPORTED)
03215 PNG_EXTERN void png_write_iCCP PNGARG((png_structp png_ptr,
03216 png_charp name, int compression_type,
03217 png_charp profile, int proflen));
03218
03219 #endif
03220
03221 #if defined(PNG_WRITE_sPLT_SUPPORTED)
03222 PNG_EXTERN void png_write_sPLT PNGARG((png_structp png_ptr,
03223 png_sPLT_tp palette));
03224 #endif
03225
03226 #if defined(PNG_WRITE_tRNS_SUPPORTED)
03227 PNG_EXTERN void png_write_tRNS PNGARG((png_structp png_ptr, png_bytep trans,
03228 png_color_16p values, int number, int color_type));
03229 #endif
03230
03231 #if defined(PNG_WRITE_bKGD_SUPPORTED)
03232 PNG_EXTERN void png_write_bKGD PNGARG((png_structp png_ptr,
03233 png_color_16p values, int color_type));
03234 #endif
03235
03236 #if defined(PNG_WRITE_hIST_SUPPORTED)
03237 PNG_EXTERN void png_write_hIST PNGARG((png_structp png_ptr, png_uint_16p hist,
03238 int num_hist));
03239 #endif
03240
03241 #if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_pCAL_SUPPORTED) || \
03242 defined(PNG_WRITE_iCCP_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED)
03243 PNG_EXTERN png_size_t png_check_keyword PNGARG((png_structp png_ptr,
03244 png_charp key, png_charpp new_key));
03245 #endif
03246
03247 #if defined(PNG_WRITE_tEXt_SUPPORTED)
03248 PNG_EXTERN void png_write_tEXt PNGARG((png_structp png_ptr, png_charp key,
03249 png_charp text, png_size_t text_len));
03250 #endif
03251
03252 #if defined(PNG_WRITE_zTXt_SUPPORTED)
03253 PNG_EXTERN void png_write_zTXt PNGARG((png_structp png_ptr, png_charp key,
03254 png_charp text, png_size_t text_len, int compression));
03255 #endif
03256
03257 #if defined(PNG_WRITE_iTXt_SUPPORTED)
03258 PNG_EXTERN void png_write_iTXt PNGARG((png_structp png_ptr,
03259 int compression, png_charp key, png_charp lang, png_charp lang_key,
03260 png_charp text));
03261 #endif
03262
03263 #if defined(PNG_TEXT_SUPPORTED)
03264 PNG_EXTERN int png_set_text_2 PNGARG((png_structp png_ptr,
03265 png_infop info_ptr, png_textp text_ptr, int num_text));
03266 #endif
03267
03268 #if defined(PNG_WRITE_oFFs_SUPPORTED)
03269 PNG_EXTERN void png_write_oFFs PNGARG((png_structp png_ptr,
03270 png_int_32 x_offset, png_int_32 y_offset, int unit_type));
03271 #endif
03272
03273 #if defined(PNG_WRITE_pCAL_SUPPORTED)
03274 PNG_EXTERN void png_write_pCAL PNGARG((png_structp png_ptr, png_charp purpose,
03275 png_int_32 X0, png_int_32 X1, int type, int nparams,
03276 png_charp units, png_charpp params));
03277 #endif
03278
03279 #if defined(PNG_WRITE_pHYs_SUPPORTED)
03280 PNG_EXTERN void png_write_pHYs PNGARG((png_structp png_ptr,
03281 png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit,
03282 int unit_type));
03283 #endif
03284
03285 #if defined(PNG_WRITE_tIME_SUPPORTED)
03286 PNG_EXTERN void png_write_tIME PNGARG((png_structp png_ptr,
03287 png_timep mod_time));
03288 #endif
03289
03290 #if defined(PNG_WRITE_sCAL_SUPPORTED)
03291 #if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO)
03292 PNG_EXTERN void png_write_sCAL PNGARG((png_structp png_ptr,
03293 int unit, double width, double height));
03294 #else
03295 #ifdef PNG_FIXED_POINT_SUPPORTED
03296 PNG_EXTERN void png_write_sCAL_s PNGARG((png_structp png_ptr,
03297 int unit, png_charp width, png_charp height));
03298 #endif
03299 #endif
03300 #endif
03301
03302
03303 PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr));
03304
03305
03306 PNG_EXTERN void png_write_start_row PNGARG((png_structp png_ptr));
03307
03308 #if defined(PNG_READ_GAMMA_SUPPORTED)
03309 PNG_EXTERN void png_build_gamma_table PNGARG((png_structp png_ptr));
03310 #endif
03311
03312
03313 PNG_EXTERN void png_combine_row PNGARG((png_structp png_ptr, png_bytep row,
03314 int mask));
03315
03316 #if defined(PNG_READ_INTERLACING_SUPPORTED)
03317
03318
03319
03320
03321
03322 PNG_EXTERN void png_do_read_interlace PNGARG((png_structp png_ptr));
03323 #endif
03324
03325
03326
03327 #if defined(PNG_WRITE_INTERLACING_SUPPORTED)
03328
03329 PNG_EXTERN void png_do_write_interlace PNGARG((png_row_infop row_info,
03330 png_bytep row, int pass));
03331 #endif
03332
03333
03334 PNG_EXTERN void png_read_filter_row PNGARG((png_structp png_ptr,
03335 png_row_infop row_info, png_bytep row, png_bytep prev_row, int filter));
03336
03337
03338 PNG_EXTERN void png_write_find_filter PNGARG((png_structp png_ptr,
03339 png_row_infop row_info));
03340
03341
03342 PNG_EXTERN void png_write_filtered_row PNGARG((png_structp png_ptr,
03343 png_bytep filtered_row));
03344
03345 PNG_EXTERN void png_read_finish_row PNGARG((png_structp png_ptr));
03346
03347
03348 PNG_EXTERN void png_read_start_row PNGARG((png_structp png_ptr));
03349
03350 PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr,
03351 png_infop info_ptr));
03352
03353
03354 #if defined(PNG_READ_FILLER_SUPPORTED)
03355 PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info,
03356 png_bytep row, png_uint_32 filler, png_uint_32 flags));
03357 #endif
03358
03359 #if defined(PNG_READ_SWAP_ALPHA_SUPPORTED)
03360 PNG_EXTERN void png_do_read_swap_alpha PNGARG((png_row_infop row_info,
03361 png_bytep row));
03362 #endif
03363
03364 #if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED)
03365 PNG_EXTERN void png_do_write_swap_alpha PNGARG((png_row_infop row_info,
03366 png_bytep row));
03367 #endif
03368
03369 #if defined(PNG_READ_INVERT_ALPHA_SUPPORTED)
03370 PNG_EXTERN void png_do_read_invert_alpha PNGARG((png_row_infop row_info,
03371 png_bytep row));
03372 #endif
03373
03374 #if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED)
03375 PNG_EXTERN void png_do_write_invert_alpha PNGARG((png_row_infop row_info,
03376 png_bytep row));
03377 #endif
03378
03379 #if defined(PNG_WRITE_FILLER_SUPPORTED) || \
03380 defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
03381 PNG_EXTERN void png_do_strip_filler PNGARG((png_row_infop row_info,
03382 png_bytep row, png_uint_32 flags));
03383 #endif
03384
03385 #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
03386 PNG_EXTERN void png_do_swap PNGARG((png_row_infop row_info, png_bytep row));
03387 #endif
03388
03389 #if defined(PNG_READ_PACKSWAP_SUPPORTED) || defined(PNG_WRITE_PACKSWAP_SUPPORTED)
03390 PNG_EXTERN void png_do_packswap PNGARG((png_row_infop row_info, png_bytep row));
03391 #endif
03392
03393 #if defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
03394 PNG_EXTERN int png_do_rgb_to_gray PNGARG((png_structp png_ptr, png_row_infop
03395 row_info, png_bytep row));
03396 #endif
03397
03398 #if defined(PNG_READ_GRAY_TO_RGB_SUPPORTED)
03399 PNG_EXTERN void png_do_gray_to_rgb PNGARG((png_row_infop row_info,
03400 png_bytep row));
03401 #endif
03402
03403 #if defined(PNG_READ_PACK_SUPPORTED)
03404 PNG_EXTERN void png_do_unpack PNGARG((png_row_infop row_info, png_bytep row));
03405 #endif
03406
03407 #if defined(PNG_READ_SHIFT_SUPPORTED)
03408 PNG_EXTERN void png_do_unshift PNGARG((png_row_infop row_info, png_bytep row,
03409 png_color_8p sig_bits));
03410 #endif
03411
03412 #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
03413 PNG_EXTERN void png_do_invert PNGARG((png_row_infop row_info, png_bytep row));
03414 #endif
03415
03416 #if defined(PNG_READ_16_TO_8_SUPPORTED)
03417 PNG_EXTERN void png_do_chop PNGARG((png_row_infop row_info, png_bytep row));
03418 #endif
03419
03420 #if defined(PNG_READ_DITHER_SUPPORTED)
03421 PNG_EXTERN void png_do_dither PNGARG((png_row_infop row_info,
03422 png_bytep row, png_bytep palette_lookup, png_bytep dither_lookup));
03423
03424 # if defined(PNG_CORRECT_PALETTE_SUPPORTED)
03425 PNG_EXTERN void png_correct_palette PNGARG((png_structp png_ptr,
03426 png_colorp palette, int num_palette));
03427 # endif
03428 #endif
03429
03430 #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
03431 PNG_EXTERN void png_do_bgr PNGARG((png_row_infop row_info, png_bytep row));
03432 #endif
03433
03434 #if defined(PNG_WRITE_PACK_SUPPORTED)
03435 PNG_EXTERN void png_do_pack PNGARG((png_row_infop row_info,
03436 png_bytep row, png_uint_32 bit_depth));
03437 #endif
03438
03439 #if defined(PNG_WRITE_SHIFT_SUPPORTED)
03440 PNG_EXTERN void png_do_shift PNGARG((png_row_infop row_info, png_bytep row,
03441 png_color_8p bit_depth));
03442 #endif
03443
03444 #if defined(PNG_READ_BACKGROUND_SUPPORTED)
03445 #if defined(PNG_READ_GAMMA_SUPPORTED)
03446 PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row,
03447 png_color_16p trans_values, png_color_16p background,
03448 png_color_16p background_1,
03449 png_bytep gamma_table, png_bytep gamma_from_1, png_bytep gamma_to_1,
03450 png_uint_16pp gamma_16, png_uint_16pp gamma_16_from_1,
03451 png_uint_16pp gamma_16_to_1, int gamma_shift));
03452 #else
03453 PNG_EXTERN void png_do_background PNGARG((png_row_infop row_info, png_bytep row,
03454 png_color_16p trans_values, png_color_16p background));
03455 #endif
03456 #endif
03457
03458 #if defined(PNG_READ_GAMMA_SUPPORTED)
03459 PNG_EXTERN void png_do_gamma PNGARG((png_row_infop row_info, png_bytep row,
03460 png_bytep gamma_table, png_uint_16pp gamma_16_table,
03461 int gamma_shift));
03462 #endif
03463
03464 #if defined(PNG_READ_EXPAND_SUPPORTED)
03465 PNG_EXTERN void png_do_expand_palette PNGARG((png_row_infop row_info,
03466 png_bytep row, png_colorp palette, png_bytep trans, int num_trans));
03467 PNG_EXTERN void png_do_expand PNGARG((png_row_infop row_info,
03468 png_bytep row, png_color_16p trans_value));
03469 #endif
03470
03471
03472
03473
03474
03475
03476 PNG_EXTERN void png_handle_IHDR PNGARG((png_structp png_ptr, png_infop info_ptr,
03477 png_uint_32 length));
03478 PNG_EXTERN void png_handle_PLTE PNGARG((png_structp png_ptr, png_infop info_ptr,
03479 png_uint_32 length));
03480 PNG_EXTERN void png_handle_IEND PNGARG((png_structp png_ptr, png_infop info_ptr,
03481 png_uint_32 length));
03482
03483 #if defined(PNG_READ_bKGD_SUPPORTED)
03484 PNG_EXTERN void png_handle_bKGD PNGARG((png_structp png_ptr, png_infop info_ptr,
03485 png_uint_32 length));
03486 #endif
03487
03488 #if defined(PNG_READ_cHRM_SUPPORTED)
03489 PNG_EXTERN void png_handle_cHRM PNGARG((png_structp png_ptr, png_infop info_ptr,
03490 png_uint_32 length));
03491 #endif
03492
03493 #if defined(PNG_READ_gAMA_SUPPORTED)
03494 PNG_EXTERN void png_handle_gAMA PNGARG((png_structp png_ptr, png_infop info_ptr,
03495 png_uint_32 length));
03496 #endif
03497
03498 #if defined(PNG_READ_hIST_SUPPORTED)
03499 PNG_EXTERN void png_handle_hIST PNGARG((png_structp png_ptr, png_infop info_ptr,
03500 png_uint_32 length));
03501 #endif
03502
03503 #if defined(PNG_READ_iCCP_SUPPORTED)
03504 extern void png_handle_iCCP PNGARG((png_structp png_ptr, png_infop info_ptr,
03505 png_uint_32 length));
03506 #endif
03507
03508 #if defined(PNG_READ_iTXt_SUPPORTED)
03509 PNG_EXTERN void png_handle_iTXt PNGARG((png_structp png_ptr, png_infop info_ptr,
03510 png_uint_32 length));
03511 #endif
03512
03513 #if defined(PNG_READ_oFFs_SUPPORTED)
03514 PNG_EXTERN void png_handle_oFFs PNGARG((png_structp png_ptr, png_infop info_ptr,
03515 png_uint_32 length));
03516 #endif
03517
03518 #if defined(PNG_READ_pCAL_SUPPORTED)
03519 PNG_EXTERN void png_handle_pCAL PNGARG((png_structp png_ptr, png_infop info_ptr,
03520 png_uint_32 length));
03521 #endif
03522
03523 #if defined(PNG_READ_pHYs_SUPPORTED)
03524 PNG_EXTERN void png_handle_pHYs PNGARG((png_structp png_ptr, png_infop info_ptr,
03525 png_uint_32 length));
03526 #endif
03527
03528 #if defined(PNG_READ_sBIT_SUPPORTED)
03529 PNG_EXTERN void png_handle_sBIT PNGARG((png_structp png_ptr, png_infop info_ptr,
03530 png_uint_32 length));
03531 #endif
03532
03533 #if defined(PNG_READ_sCAL_SUPPORTED)
03534 PNG_EXTERN void png_handle_sCAL PNGARG((png_structp png_ptr, png_infop info_ptr,
03535 png_uint_32 length));
03536 #endif
03537
03538 #if defined(PNG_READ_sPLT_SUPPORTED)
03539 extern void png_handle_sPLT PNGARG((png_structp png_ptr, png_infop info_ptr,
03540 png_uint_32 length));
03541 #endif
03542
03543 #if defined(PNG_READ_sRGB_SUPPORTED)
03544 PNG_EXTERN void png_handle_sRGB PNGARG((png_structp png_ptr, png_infop info_ptr,
03545 png_uint_32 length));
03546 #endif
03547
03548 #if defined(PNG_READ_tEXt_SUPPORTED)
03549 PNG_EXTERN void png_handle_tEXt PNGARG((png_structp png_ptr, png_infop info_ptr,
03550 png_uint_32 length));
03551 #endif
03552
03553 #if defined(PNG_READ_tIME_SUPPORTED)
03554 PNG_EXTERN void png_handle_tIME PNGARG((png_structp png_ptr, png_infop info_ptr,
03555 png_uint_32 length));
03556 #endif
03557
03558 #if defined(PNG_READ_tRNS_SUPPORTED)
03559 PNG_EXTERN void png_handle_tRNS PNGARG((png_structp png_ptr, png_infop info_ptr,
03560 png_uint_32 length));
03561 #endif
03562
03563 #if defined(PNG_READ_zTXt_SUPPORTED)
03564 PNG_EXTERN void png_handle_zTXt PNGARG((png_structp png_ptr, png_infop info_ptr,
03565 png_uint_32 length));
03566 #endif
03567
03568 PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr,
03569 png_infop info_ptr, png_uint_32 length));
03570
03571 PNG_EXTERN void png_check_chunk_name PNGARG((png_structp png_ptr,
03572 png_bytep chunk_name));
03573
03574
03575 PNG_EXTERN void png_do_read_transformations PNGARG((png_structp png_ptr));
03576 PNG_EXTERN void png_do_write_transformations PNGARG((png_structp png_ptr));
03577
03578 PNG_EXTERN void png_init_read_transformations PNGARG((png_structp png_ptr));
03579
03580 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
03581 PNG_EXTERN void png_push_read_chunk PNGARG((png_structp png_ptr,
03582 png_infop info_ptr));
03583 PNG_EXTERN void png_push_read_sig PNGARG((png_structp png_ptr,
03584 png_infop info_ptr));
03585 PNG_EXTERN void png_push_check_crc PNGARG((png_structp png_ptr));
03586 PNG_EXTERN void png_push_crc_skip PNGARG((png_structp png_ptr,
03587 png_uint_32 length));
03588 PNG_EXTERN void png_push_crc_finish PNGARG((png_structp png_ptr));
03589 PNG_EXTERN void png_push_save_buffer PNGARG((png_structp png_ptr));
03590 PNG_EXTERN void png_push_restore_buffer PNGARG((png_structp png_ptr,
03591 png_bytep buffer, png_size_t buffer_length));
03592 PNG_EXTERN void png_push_read_IDAT PNGARG((png_structp png_ptr));
03593 PNG_EXTERN void png_process_IDAT_data PNGARG((png_structp png_ptr,
03594 png_bytep buffer, png_size_t buffer_length));
03595 PNG_EXTERN void png_push_process_row PNGARG((png_structp png_ptr));
03596 PNG_EXTERN void png_push_handle_unknown PNGARG((png_structp png_ptr,
03597 png_infop info_ptr, png_uint_32 length));
03598 PNG_EXTERN void png_push_have_info PNGARG((png_structp png_ptr,
03599 png_infop info_ptr));
03600 PNG_EXTERN void png_push_have_end PNGARG((png_structp png_ptr,
03601 png_infop info_ptr));
03602 PNG_EXTERN void png_push_have_row PNGARG((png_structp png_ptr, png_bytep row));
03603 PNG_EXTERN void png_push_read_end PNGARG((png_structp png_ptr,
03604 png_infop info_ptr));
03605 PNG_EXTERN void png_process_some_data PNGARG((png_structp png_ptr,
03606 png_infop info_ptr));
03607 PNG_EXTERN void png_read_push_finish_row PNGARG((png_structp png_ptr));
03608 #if defined(PNG_READ_tEXt_SUPPORTED)
03609 PNG_EXTERN void png_push_handle_tEXt PNGARG((png_structp png_ptr,
03610 png_infop info_ptr, png_uint_32 length));
03611 PNG_EXTERN void png_push_read_tEXt PNGARG((png_structp png_ptr,
03612 png_infop info_ptr));
03613 #endif
03614 #if defined(PNG_READ_zTXt_SUPPORTED)
03615 PNG_EXTERN void png_push_handle_zTXt PNGARG((png_structp png_ptr,
03616 png_infop info_ptr, png_uint_32 length));
03617 PNG_EXTERN void png_push_read_zTXt PNGARG((png_structp png_ptr,
03618 png_infop info_ptr));
03619 #endif
03620 #if defined(PNG_READ_iTXt_SUPPORTED)
03621 PNG_EXTERN void png_push_handle_iTXt PNGARG((png_structp png_ptr,
03622 png_infop info_ptr, png_uint_32 length));
03623 PNG_EXTERN void png_push_read_iTXt PNGARG((png_structp png_ptr,
03624 png_infop info_ptr));
03625 #endif
03626
03627 #endif
03628
03629 #ifdef PNG_MNG_FEATURES_SUPPORTED
03630 PNG_EXTERN void png_do_read_intrapixel PNGARG((png_row_infop row_info,
03631 png_bytep row));
03632 PNG_EXTERN void png_do_write_intrapixel PNGARG((png_row_infop row_info,
03633 png_bytep row));
03634 #endif
03635
03636 #if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
03637 #if defined(PNG_MMX_CODE_SUPPORTED)
03638
03639 PNG_EXTERN void png_init_mmx_flags PNGARG((png_structp png_ptr));
03640 #endif
03641 #endif
03642
03643 #if defined(PNG_INCH_CONVERSIONS) && defined(PNG_FLOATING_POINT_SUPPORTED)
03644 PNG_EXTERN png_uint_32 png_get_pixels_per_inch PNGARG((png_structp png_ptr,
03645 png_infop info_ptr));
03646
03647 PNG_EXTERN png_uint_32 png_get_x_pixels_per_inch PNGARG((png_structp png_ptr,
03648 png_infop info_ptr));
03649
03650 PNG_EXTERN png_uint_32 png_get_y_pixels_per_inch PNGARG((png_structp png_ptr,
03651 png_infop info_ptr));
03652
03653 PNG_EXTERN float png_get_x_offset_inches PNGARG((png_structp png_ptr,
03654 png_infop info_ptr));
03655
03656 PNG_EXTERN float png_get_y_offset_inches PNGARG((png_structp png_ptr,
03657 png_infop info_ptr));
03658
03659 #if defined(PNG_pHYs_SUPPORTED)
03660 PNG_EXTERN png_uint_32 png_get_pHYs_dpi PNGARG((png_structp png_ptr,
03661 png_infop info_ptr, png_uint_32 *res_x, png_uint_32 *res_y, int *unit_type));
03662 #endif
03663 #endif
03664
03665
03666 PNG_EXTERN png_uint_32 png_read_chunk_header PNGARG((png_structp png_ptr));
03667
03668
03669 #if defined(PNG_cHRM_SUPPORTED)
03670 PNG_EXTERN int png_check_cHRM_fixed PNGARG((png_structp png_ptr,
03671 png_fixed_point int_white_x, png_fixed_point int_white_y,
03672 png_fixed_point int_red_x, png_fixed_point int_red_y, png_fixed_point
03673 int_green_x, png_fixed_point int_green_y, png_fixed_point int_blue_x,
03674 png_fixed_point int_blue_y));
03675 #endif
03676
03677
03678
03679 #endif
03680
03681 #ifdef __cplusplus
03682 }
03683 #endif
03684
03685 #endif
03686
03687 #endif