439 lines
23 KiB
C
439 lines
23 KiB
C
|
/***************************************************************************/
|
||
|
|
/* */
|
||
|
|
/* tttables.h */
|
||
|
|
/* */
|
||
|
|
/* Basic SFNT/TrueType tables definitions and interface */
|
||
|
|
/* */
|
||
|
|
/* */
|
||
|
|
/* 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 <freetype.h>
|
||
|
|
|
||
|
|
/*************************************************************************/
|
||
|
|
/* */
|
||
|
|
/* <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 */
|
||
|
|
FT_ULong ulCodePageRange3; /* Bits 64-95 */
|
||
|
|
FT_ULong ulCodePageRange4; /* Bits 96-127 */
|
||
|
|
|
||
|
|
} 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;
|
||
|
|
|
||
|
|
|
||
|
|
typedef enum
|
||
|
|
{
|
||
|
|
ft_sfnt_head = 0,
|
||
|
|
ft_sfnt_hhea = 1,
|
||
|
|
ft_sfnt_vhea = 2,
|
||
|
|
ft_sfnt_os2 = 3,
|
||
|
|
ft_sfnt_post = 4,
|
||
|
|
|
||
|
|
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 :: handle to source
|
||
|
|
* tag :: index if SFNT table
|
||
|
|
*
|
||
|
|
* <Return>
|
||
|
|
* type-less pointer to the table. This will be 0 in case of error, or
|
||
|
|
* when 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.
|
||
|
|
*
|
||
|
|
* You can load any table with a different function.. XXX
|
||
|
|
*
|
||
|
|
***************************************************************************/
|
||
|
|
|
||
|
|
EXPORT_DEF
|
||
|
|
void* FT_Get_Sfnt_Table( FT_Face face,
|
||
|
|
FT_Sfnt_Tag tag );
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* TTTABLES_H */
|
||
|
|
|