kc3-lang/freetype/include/freetype/tttables.h
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Hash : 38208a6e
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Date : 2001-01-11T09:27:49
* docs/docmaker.py: Minor improvements to reduce unwanted spaces and empty lines in output. * docs/docmaker.py: Improved script to generate table of contents and index pages. It also supports wildcards on non Unix systems. * include/freetype/*.h, include/freetype/cache/*.h: Updated comments to include section definitions/delimitations for the API Reference generator. * include/freetype/freetype.h: Moved declaration of `FT_Generic_Finalizer' and the `FT_Generic' structure to... * include/freetype/fttypes.h: here.
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include/freetype/tttables.h
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/***************************************************************************/ /* */ /* tttables.h */ /* */ /* Basic SFNT/TrueType tables definitions and interface */ /* (specification only). */ /* */ /* Copyright 1996-2000 by */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used, */ /* modified, and distributed under the terms of the FreeType project */ /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ /* this file you indicate that you have read the license and */ /* understand and accept it fully. */ /* */ /***************************************************************************/ #ifndef __TTTABLES_H__ #define __TTTABLES_H__ #include <ft2build.h> #include FT_FREETYPE_H FT_BEGIN_HEADER /*************************************************************************/ /* */ /* <Section> */ /* truetype_tables */ /* */ /* <Title> */ /* TrueType Tables */ /* */ /* <Abstract> */ /* TrueType-specific table types and functions. */ /* */ /* <Description> */ /* This section contains the definition of TrueType-specific tables */ /* as well as some routines used to access and process them. */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* <Struct> */ /* TT_Header */ /* */ /* <Description> */ /* A structure used to model a TrueType font header table. All */ /* fields follow the TrueType specification. */ /* */ typedef struct TT_Header_ { FT_Fixed Table_Version; FT_Fixed Font_Revision; FT_Long CheckSum_Adjust; FT_Long Magic_Number; FT_UShort Flags; FT_UShort Units_Per_EM; FT_Long Created [2]; FT_Long Modified[2]; FT_Short xMin; FT_Short yMin; FT_Short xMax; FT_Short yMax; FT_UShort Mac_Style; FT_UShort Lowest_Rec_PPEM; FT_Short Font_Direction; FT_Short Index_To_Loc_Format; FT_Short Glyph_Data_Format; } TT_Header; /*************************************************************************/ /* */ /* <Struct> */ /* TT_HoriHeader */ /* */ /* <Description> */ /* A structure used to model a TrueType horizontal header, the `hhea' */ /* table, as well as the corresponding horizontal metrics table, */ /* i.e., the `hmtx' table. */ /* */ /* <Fields> */ /* Version :: The table version. */ /* */ /* Ascender :: The font's ascender, i.e., the distance */ /* from the baseline to the top-most of all */ /* glyph points found in the font. */ /* */ /* This value is invalid in many fonts, as */ /* it is usually set by the font designer, */ /* and often reflects only a portion of the */ /* glyphs found in the font (maybe ASCII). */ /* */ /* You should use the `sTypoAscender' field */ /* of the OS/2 table instead if you want */ /* the correct one. */ /* */ /* Descender :: The font's descender, i.e., the distance */ /* from the baseline to the bottom-most of */ /* all glyph points found in the font. It */ /* is negative. */ /* */ /* This value is invalid in many fonts, as */ /* it is usually set by the font designer, */ /* and often reflects only a portion of the */ /* glyphs found in the font (maybe ASCII). */ /* */ /* You should use the `sTypoDescender' */ /* field of the OS/2 table instead if you */ /* want the correct one. */ /* */ /* Line_Gap :: The font's line gap, i.e., the distance */ /* to add to the ascender and descender to */ /* get the BTB, i.e., the */ /* baseline-to-baseline distance for the */ /* font. */ /* */ /* advance_Width_Max :: This field is the maximum of all advance */ /* widths found in the font. It can be */ /* used to compute the maximum width of an */ /* arbitrary string of text. */ /* */ /* min_Left_Side_Bearing :: The minimum left side bearing of all */ /* glyphs within the font. */ /* */ /* min_Right_Side_Bearing :: The minimum right side bearing of all */ /* glyphs within the font. */ /* */ /* xMax_Extent :: The maximum horizontal extent (i.e., the */ /* `width' of a glyph's bounding box) for */ /* all glyphs in the font. */ /* */ /* caret_Slope_Rise :: The rise coefficient of the cursor's */ /* slope of the cursor (slope=rise/run). */ /* */ /* caret_Slope_Run :: The run coefficient of the cursor's */ /* slope. */ /* */ /* Reserved :: 10 reserved bytes. */ /* */ /* metric_Data_Format :: Always 0. */ /* */ /* number_Of_HMetrics :: Number of HMetrics entries in the `hmtx' */ /* table -- this value can be smaller than */ /* the total number of glyphs in the font. */ /* */ /* long_metrics :: A pointer into the `hmtx' table. */ /* */ /* short_metrics :: A pointer into the `hmtx' table. */ /* */ /* <Note> */ /* IMPORTANT: The TT_HoriHeader and TT_VertHeader structures should */ /* be identical except for the names of their fields which */ /* are different. */ /* */ /* This ensures that a single function in the `ttload' */ /* module is able to read both the horizontal and vertical */ /* headers. */ /* */ typedef struct TT_HoriHeader_ { FT_Fixed Version; FT_Short Ascender; FT_Short Descender; FT_Short Line_Gap; FT_UShort advance_Width_Max; /* advance width maximum */ FT_Short min_Left_Side_Bearing; /* minimum left-sb */ FT_Short min_Right_Side_Bearing; /* minimum right-sb */ FT_Short xMax_Extent; /* xmax extents */ FT_Short caret_Slope_Rise; FT_Short caret_Slope_Run; FT_Short caret_Offset; FT_Short Reserved[4]; FT_Short metric_Data_Format; FT_UShort number_Of_HMetrics; /* The following fields are not defined by the TrueType specification */ /* but they're used to connect the metrics header to the relevant */ /* `HMTX' table. */ void* long_metrics; void* short_metrics; } TT_HoriHeader; /*************************************************************************/ /* */ /* <Struct> */ /* TT_VertHeader */ /* */ /* <Description> */ /* A structure used to model a TrueType vertical header, the `vhea' */ /* table, as well as the corresponding vertical metrics table, i.e., */ /* the `vmtx' table. */ /* */ /* <Fields> */ /* Version :: The table version. */ /* */ /* Ascender :: The font's ascender, i.e., the distance */ /* from the baseline to the top-most of */ /* all glyph points found in the font. */ /* */ /* This value is invalid in many fonts, as */ /* it is usually set by the font designer, */ /* and often reflects only a portion of */ /* the glyphs found in the font (maybe */ /* ASCII). */ /* */ /* You should use the `sTypoAscender' */ /* field of the OS/2 table instead if you */ /* want the correct one. */ /* */ /* Descender :: The font's descender, i.e., the */ /* distance from the baseline to the */ /* bottom-most of all glyph points found */ /* in the font. It is negative. */ /* */ /* This value is invalid in many fonts, as */ /* it is usually set by the font designer, */ /* and often reflects only a portion of */ /* the glyphs found in the font (maybe */ /* ASCII). */ /* */ /* You should use the `sTypoDescender' */ /* field of the OS/2 table instead if you */ /* want the correct one. */ /* */ /* Line_Gap :: The font's line gap, i.e., the distance */ /* to add to the ascender and descender to */ /* get the BTB, i.e., the */ /* baseline-to-baseline distance for the */ /* font. */ /* */ /* advance_Height_Max :: This field is the maximum of all */ /* advance heights found in the font. It */ /* can be used to compute the maximum */ /* height of an arbitrary string of text. */ /* */ /* min_Top_Side_Bearing :: The minimum top side bearing of all */ /* glyphs within the font. */ /* */ /* min_Bottom_Side_Bearing :: The minimum bottom side bearing of all */ /* glyphs within the font. */ /* */ /* yMax_Extent :: The maximum vertical extent (i.e., the */ /* `height' of a glyph's bounding box) for */ /* all glyphs in the font. */ /* */ /* caret_Slope_Rise :: The rise coefficient of the cursor's */ /* slope of the cursor (slope=rise/run). */ /* */ /* caret_Slope_Run :: The run coefficient of the cursor's */ /* slope. */ /* */ /* Reserved :: 10 reserved bytes. */ /* */ /* metric_Data_Format :: Always 0. */ /* */ /* number_Of_HMetrics :: Number of VMetrics entries in the */ /* `vmtx' table -- this value can be */ /* smaller than the total number of glyphs */ /* in the font. */ /* */ /* long_metrics :: A pointer into the `vmtx' table. */ /* */ /* short_metrics :: A pointer into the `vmtx' table. */ /* */ /* <Note> */ /* IMPORTANT: The TT_HoriHeader and TT_VertHeader structures should */ /* be identical except for the names of their fields which */ /* are different. */ /* */ /* This ensures that a single function in the `ttload' */ /* module is able to read both the horizontal and vertical */ /* headers. */ /* */ typedef struct TT_VertHeader_ { FT_Fixed Version; FT_Short Ascender; FT_Short Descender; FT_Short Line_Gap; FT_UShort advance_Height_Max; /* advance height maximum */ FT_Short min_Top_Side_Bearing; /* minimum left-sb or top-sb */ FT_Short min_Bottom_Side_Bearing; /* minimum right-sb or bottom-sb */ FT_Short yMax_Extent; /* xmax or ymax extents */ FT_Short caret_Slope_Rise; FT_Short caret_Slope_Run; FT_Short caret_Offset; FT_Short Reserved[4]; FT_Short metric_Data_Format; FT_UShort number_Of_VMetrics; /* The following fields are not defined by the TrueType specification */ /* but they're used to connect the metrics header to the relevant */ /* `HMTX' or `VMTX' table. */ void* long_metrics; void* short_metrics; } TT_VertHeader; /*************************************************************************/ /* */ /* <Struct> */ /* TT_OS2 */ /* */ /* <Description> */ /* A structure used to model a TrueType OS/2 table. This is the long */ /* table version. All fields comply to the TrueType specification. */ /* */ /* Note that we now support old Mac fonts which do not include an */ /* OS/2 table. In this case, the `version' field is always set to */ /* 0xFFFF. */ /* */ typedef struct TT_OS2_ { FT_UShort version; /* 0x0001 - more or 0xFFFF */ FT_Short xAvgCharWidth; FT_UShort usWeightClass; FT_UShort usWidthClass; FT_Short fsType; FT_Short ySubscriptXSize; FT_Short ySubscriptYSize; FT_Short ySubscriptXOffset; FT_Short ySubscriptYOffset; FT_Short ySuperscriptXSize; FT_Short ySuperscriptYSize; FT_Short ySuperscriptXOffset; FT_Short ySuperscriptYOffset; FT_Short yStrikeoutSize; FT_Short yStrikeoutPosition; FT_Short sFamilyClass; FT_Byte panose[10]; FT_ULong ulUnicodeRange1; /* Bits 0-31 */ FT_ULong ulUnicodeRange2; /* Bits 32-63 */ FT_ULong ulUnicodeRange3; /* Bits 64-95 */ FT_ULong ulUnicodeRange4; /* Bits 96-127 */ FT_Char achVendID[4]; FT_UShort fsSelection; FT_UShort usFirstCharIndex; FT_UShort usLastCharIndex; FT_Short sTypoAscender; FT_Short sTypoDescender; FT_Short sTypoLineGap; FT_UShort usWinAscent; FT_UShort usWinDescent; /* only version 1 tables: */ FT_ULong ulCodePageRange1; /* Bits 0-31 */ FT_ULong ulCodePageRange2; /* Bits 32-63 */ /* only version 2 tables: */ FT_Short sxHeight; FT_Short sCapHeight; FT_UShort usDefaultChar; FT_UShort usBreakChar; FT_UShort usMaxContext; } TT_OS2; /*************************************************************************/ /* */ /* <Struct> */ /* TT_Postscript */ /* */ /* <Description> */ /* A structure used to model a TrueType Postscript table. All fields */ /* comply to the TrueType table. This structure does not reference */ /* the Postscript glyph names, which can be nevertheless accessed */ /* with the `ttpost' module. */ /* */ typedef struct TT_Postscript_ { FT_Fixed FormatType; FT_Fixed italicAngle; FT_Short underlinePosition; FT_Short underlineThickness; FT_ULong isFixedPitch; FT_ULong minMemType42; FT_ULong maxMemType42; FT_ULong minMemType1; FT_ULong maxMemType1; /* Glyph names follow in the file, but we don't */ /* load them by default. See the ttpost.c file. */ } TT_Postscript; /*************************************************************************/ /* */ /* <Struct> */ /* TT_PCLT */ /* */ /* <Description> */ /* A structure used to model a TrueType PCLT table. All fields */ /* comply to the TrueType table. */ /* */ typedef struct TT_PCLT_ { FT_Fixed Version; FT_ULong FontNumber; FT_UShort Pitch; FT_UShort xHeight; FT_UShort Style; FT_UShort TypeFamily; FT_UShort CapHeight; FT_UShort SymbolSet; FT_Char TypeFace[16]; FT_Char CharacterComplement[8]; FT_Char FileName[6]; FT_Char StrokeWeight; FT_Char WidthType; FT_Byte SerifStyle; FT_Byte Reserved; } TT_PCLT; /*************************************************************************/ /* */ /* <Struct> */ /* TT_MaxProfile */ /* */ /* <Description> */ /* The maximum profile is a table containing many max values which */ /* can be used to pre-allocate arrays. This ensures that no memory */ /* allocation occurs during a glyph load. */ /* */ /* <Fields> */ /* version :: The version number. */ /* */ /* numGlyphs :: The number of glyphs in this TrueType */ /* font. */ /* */ /* maxPoints :: The maximum number of points in a */ /* non-composite TrueType glyph. See also */ /* the structure element */ /* `maxCompositePoints'. */ /* */ /* maxContours :: The maximum number of contours in a */ /* non-composite TrueType glyph. See also */ /* the structure element */ /* `maxCompositeContours'. */ /* */ /* maxCompositePoints :: The maximum number of points in a */ /* composite TrueType glyph. See also the */ /* structure element `maxPoints'. */ /* */ /* maxCompositeContours :: The maximum number of contours in a */ /* composite TrueType glyph. See also the */ /* structure element `maxContours'. */ /* */ /* maxZones :: The maximum number of zones used for */ /* glyph hinting. */ /* */ /* maxTwilightPoints :: The maximum number of points in the */ /* twilight zone used for glyph hinting. */ /* */ /* maxStorage :: The maximum number of elements in the */ /* storage area used for glyph hinting. */ /* */ /* maxFunctionDefs :: The maximum number of function */ /* definitions in the TrueType bytecode for */ /* this font. */ /* */ /* maxInstructionDefs :: The maximum number of instruction */ /* definitions in the TrueType bytecode for */ /* this font. */ /* */ /* maxStackElements :: The maximum number of stack elements used */ /* during bytecode interpretation. */ /* */ /* maxSizeOfInstructions :: The maximum number of TrueType opcodes */ /* used for glyph hinting. */ /* */ /* maxComponentElements :: An obscure value related to composite */ /* glyphs definitions. */ /* */ /* maxComponentDepth :: An obscure value related to composite */ /* glyphs definitions. Probably the maximum */ /* number of simple glyphs in a composite. */ /* */ /* <Note> */ /* This structure is only used during font loading. */ /* */ typedef struct TT_MaxProfile_ { FT_Fixed version; FT_UShort numGlyphs; FT_UShort maxPoints; FT_UShort maxContours; FT_UShort maxCompositePoints; FT_UShort maxCompositeContours; FT_UShort maxZones; FT_UShort maxTwilightPoints; FT_UShort maxStorage; FT_UShort maxFunctionDefs; FT_UShort maxInstructionDefs; FT_UShort maxStackElements; FT_UShort maxSizeOfInstructions; FT_UShort maxComponentElements; FT_UShort maxComponentDepth; } TT_MaxProfile; /* */ typedef enum { ft_sfnt_head = 0, ft_sfnt_maxp = 1, ft_sfnt_os2 = 2, ft_sfnt_hhea = 3, ft_sfnt_vhea = 4, ft_sfnt_post = 5, ft_sfnt_pclt = 6, sfnt_max /* don't remove */ } FT_Sfnt_Tag; /* internal use only */ typedef void* (*FT_Get_Sfnt_Table_Func)( FT_Face face, FT_Sfnt_Tag tag ); /*************************************************************************/ /* */ /* <Function> */ /* FT_Get_Sfnt_Table */ /* */ /* <Description> */ /* Returns a pointer to a given SFNT table within a face. */ /* */ /* <Input> */ /* face :: A handle to the source. */ /* */ /* tag :: The index of the SFNT table. */ /* */ /* <Return> */ /* A type-less pointer to the table. This will be 0 in case of */ /* error, or if the corresponding table was not found *OR* loaded */ /* from the file. */ /* */ /* <Note> */ /* The table is owned by the face object and disappears with it. */ /* */ /* This function is only useful to access SFNT tables that are loaded */ /* by the sfnt/truetype/opentype drivers. See FT_Sfnt_Tag for a */ /* list. */ /* */ FT_EXPORT( void* ) FT_Get_Sfnt_Table( FT_Face face, FT_Sfnt_Tag tag ); /* */ FT_END_HEADER #endif /* __TTTABLES_H__ */ /* END */