+++ /dev/null
-/***************************************************************************/
-/* */
-/* tttypes.h */
-/* */
-/* Basic SFNT/TrueType type definitions and interface (specification */
-/* only). */
-/* */
-/* Copyright 1996-2001 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 __TTTYPES_H__
-#define __TTTYPES_H__
-
-
-#include <ft2build.h>
-#include FT_TRUETYPE_TABLES_H
-#include FT_INTERNAL_OBJECTS_H
-
-
-FT_BEGIN_HEADER
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /*** ***/
- /*** ***/
- /*** REQUIRED TRUETYPE/OPENTYPE TABLES DEFINITIONS ***/
- /*** ***/
- /*** ***/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TTC_Header */
- /* */
- /* <Description> */
- /* TrueType collection header. This table contains the offsets of */
- /* the font headers of each distinct TrueType face in the file. */
- /* */
- /* <Fields> */
- /* tag :: Must be `ttc ' to indicate a TrueType collection. */
- /* */
- /* version :: The version number. */
- /* */
- /* count :: The number of faces in the collection. The */
- /* specification says this should be an unsigned long, but */
- /* we use a signed long since we need the value -1 for */
- /* specific purposes. */
- /* */
- /* offsets :: The offsets of the font headers, one per face. */
- /* */
- typedef struct TTC_Header_
- {
- FT_ULong tag;
- FT_Fixed version;
- FT_Long count;
- FT_ULong* offsets;
-
- } TTC_Header;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* SFNT_Header */
- /* */
- /* <Description> */
- /* SFNT file format header. */
- /* */
- /* <Fields> */
- /* format_tag :: The font format tag. */
- /* */
- /* num_tables :: The number of tables in file. */
- /* */
- /* search_range :: Must be 16*(max power of 2 <= num_tables). */
- /* */
- /* entry_selector :: Must be log2 of search_range/16. */
- /* */
- /* range_shift :: Must be num_tables*16 - search_range. */
- /* */
- typedef struct SFNT_Header_
- {
- FT_ULong format_tag;
- FT_UShort num_tables;
- FT_UShort search_range;
- FT_UShort entry_selector;
- FT_UShort range_shift;
-
- } SFNT_Header;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_TableDir */
- /* */
- /* <Description> */
- /* This structure models a TrueType table directory. It is used to */
- /* access the various tables of the font face. */
- /* */
- /* <Fields> */
- /* version :: The version number; starts with 0x00010000. */
- /* */
- /* numTables :: The number of tables. */
- /* */
- /* searchRange :: Unused. */
- /* */
- /* entrySelector :: Unused. */
- /* */
- /* rangeShift :: Unused. */
- /* */
- /* <Note> */
- /* This structure is only used during font opening. */
- /* */
- typedef struct TT_TableDir_
- {
- FT_Fixed version; /* should be 0x10000 */
- FT_UShort numTables; /* number of tables */
-
- FT_UShort searchRange; /* These parameters are only used */
- FT_UShort entrySelector; /* for a dichotomy search in the */
- FT_UShort rangeShift; /* directory. We ignore them. */
-
- } TT_TableDir;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_Table */
- /* */
- /* <Description> */
- /* This structure describes a given table of a TrueType font. */
- /* */
- /* <Fields> */
- /* Tag :: A four-bytes tag describing the table. */
- /* */
- /* CheckSum :: The table checksum. This value can be ignored. */
- /* */
- /* Offset :: The offset of the table from the start of the TrueType */
- /* font in its resource. */
- /* */
- /* Length :: The table length (in bytes). */
- /* */
- typedef struct TT_Table_
- {
- FT_ULong Tag; /* table type */
- FT_ULong CheckSum; /* table checksum */
- FT_ULong Offset; /* table file offset */
- FT_ULong Length; /* table length */
-
- } TT_Table;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_CMapDir */
- /* */
- /* <Description> */
- /* This structure describes the directory of the `cmap' table, */
- /* containing the font's character mappings table. */
- /* */
- /* <Fields> */
- /* tableVersionNumber :: The version number. */
- /* */
- /* numCMaps :: The number of charmaps in the font. */
- /* */
- /* <Note> */
- /* This structure is only used during font loading. */
- /* */
- typedef struct TT_CMapDir_
- {
- FT_UShort tableVersionNumber;
- FT_UShort numCMaps;
-
- } TT_CMapDir;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_CMapDirEntry */
- /* */
- /* <Description> */
- /* This structure describes a charmap in a TrueType font. */
- /* */
- /* <Fields> */
- /* platformID :: An ID used to specify for which platform this */
- /* charmap is defined (FreeType manages all platforms). */
- /* */
- /* encodingID :: A platform-specific ID used to indicate which source */
- /* encoding is used in this charmap. */
- /* */
- /* offset :: The offset of the charmap relative to the start of */
- /* the `cmap' table. */
- /* */
- /* <Note> */
- /* This structure is only used during font loading. */
- /* */
- typedef struct TT_CMapDirEntry_
- {
- FT_UShort platformID;
- FT_UShort platformEncodingID;
- FT_Long offset;
-
- } TT_CMapDirEntry;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_LongMetrics */
- /* */
- /* <Description> */
- /* A structure modeling the long metrics of the `hmtx' and `vmtx' */
- /* TrueType tables. The values are expressed in font units. */
- /* */
- /* <Fields> */
- /* advance :: The advance width or height for the glyph. */
- /* */
- /* bearing :: The left-side or top-side bearing for the glyph. */
- /* */
- typedef struct TT_LongMetrics_
- {
- FT_UShort advance;
- FT_Short bearing;
-
- } TT_LongMetrics;
-
-
- /*************************************************************************/
- /* */
- /* <Type> TT_ShortMetrics */
- /* */
- /* <Description> */
- /* A simple type to model the short metrics of the `hmtx' and `vmtx' */
- /* tables. */
- /* */
- typedef FT_Short TT_ShortMetrics;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_NameRec */
- /* */
- /* <Description> */
- /* A structure modeling TrueType name records. Name records are used */
- /* to store important strings like family name, style name, */
- /* copyright, etc. in _localized_ versions (i.e., language, encoding, */
- /* etc). */
- /* */
- /* <Fields> */
- /* platformID :: The ID of the name's encoding platform. */
- /* */
- /* encodingID :: The platform-specific ID for the name's encoding. */
- /* */
- /* languageID :: The platform-specific ID for the name's language. */
- /* */
- /* nameID :: The ID specifying what kind of name this is. */
- /* */
- /* stringLength :: The length of the string in bytes. */
- /* */
- /* stringOffset :: The offset to the string in the `name' table. */
- /* */
- /* string :: A pointer to the string's bytes. Note that these */
- /* are usually UTF-16 encoded characters. */
- /* */
- typedef struct TT_NameRec_
- {
- FT_UShort platformID;
- FT_UShort encodingID;
- FT_UShort languageID;
- FT_UShort nameID;
- FT_UShort stringLength;
- FT_UShort stringOffset;
-
- /* this last field is not defined in the spec */
- /* but used by the FreeType engine */
-
- FT_Byte* string;
-
- } TT_NameRec;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_NameTable */
- /* */
- /* <Description> */
- /* A structure modeling the TrueType name table. */
- /* */
- /* <Fields> */
- /* format :: The format of the name table. */
- /* */
- /* numNameRecords :: The number of names in table. */
- /* */
- /* storageOffset :: The offset of the name table in the `name' */
- /* TrueType table. */
- /* */
- /* names :: An array of name records. */
- /* */
- /* storage :: The names storage area. */
- /* */
- typedef struct TT_NameTable_
- {
- FT_UShort format;
- FT_UShort numNameRecords;
- FT_UShort storageOffset;
- TT_NameRec* names;
- FT_Byte* storage;
-
- } TT_NameTable;
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /*** ***/
- /*** ***/
- /*** OPTIONAL TRUETYPE/OPENTYPE TABLES DEFINITIONS ***/
- /*** ***/
- /*** ***/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_GaspRange */
- /* */
- /* <Description> */
- /* A tiny structure used to model a gasp range according to the */
- /* TrueType specification. */
- /* */
- /* <Fields> */
- /* maxPPEM :: The maximum ppem value to which `gaspFlag' applies. */
- /* */
- /* gaspFlag :: A flag describing the grid-fitting and anti-aliasing */
- /* modes to be used. */
- /* */
- typedef struct TT_GaspRange_
- {
- FT_UShort maxPPEM;
- FT_UShort gaspFlag;
-
- } TT_GaspRange;
-
-
-#define TT_GASP_GRIDFIT 0x01
-#define TT_GASP_DOGRAY 0x02
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_Gasp */
- /* */
- /* <Description> */
- /* A structure modeling the TrueType `gasp' table used to specify */
- /* grid-fitting and anti-aliasing behaviour. */
- /* */
- /* <Fields> */
- /* version :: The version number. */
- /* */
- /* numRanges :: The number of gasp ranges in table. */
- /* */
- /* gaspRanges :: An array of gasp ranges. */
- /* */
- typedef struct TT_Gasp_
- {
- FT_UShort version;
- FT_UShort numRanges;
- TT_GaspRange* gaspRanges;
-
- } TT_Gasp;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_HdmxRec */
- /* */
- /* <Description> */
- /* A small structure used to model the pre-computed widths of a given */
- /* size. They are found in the `hdmx' table. */
- /* */
- /* <Fields> */
- /* ppem :: The pixels per EM value at which these metrics apply. */
- /* */
- /* max_width :: The maximum advance width for this metric. */
- /* */
- /* widths :: An array of widths. Note: These are 8-bit bytes. */
- /* */
- typedef struct TT_HdmxRec_
- {
- FT_Byte ppem;
- FT_Byte max_width;
- FT_Byte* widths;
-
- } TT_HdmxRec;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_Hdmx */
- /* */
- /* <Description> */
- /* A structure used to model the `hdmx' table, which contains */
- /* pre-computed widths for a set of given sizes/dimensions. */
- /* */
- /* <Fields> */
- /* version :: The version number. */
- /* */
- /* num_records :: The number of hdmx records. */
- /* */
- /* records :: An array of hdmx records. */
- /* */
- typedef struct TT_Hdmx_
- {
- FT_UShort version;
- FT_Short num_records;
- TT_HdmxRec* records;
-
- } TT_Hdmx;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_Kern_0_Pair */
- /* */
- /* <Description> */
- /* A structure used to model a kerning pair for the kerning table */
- /* format 0. The engine now loads this table if it finds one in the */
- /* font file. */
- /* */
- /* <Fields> */
- /* left :: The index of the left glyph in pair. */
- /* */
- /* right :: The index of the right glyph in pair. */
- /* */
- /* value :: The kerning distance. A positive value spaces the */
- /* glyphs, a negative one makes them closer. */
- /* */
- typedef struct TT_Kern_0_Pair_
- {
- FT_UShort left; /* index of left glyph in pair */
- FT_UShort right; /* index of right glyph in pair */
- FT_FWord value; /* kerning value */
-
- } TT_Kern_0_Pair;
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /*** ***/
- /*** ***/
- /*** EMBEDDED BITMAPS SUPPORT ***/
- /*** ***/
- /*** ***/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_SBit_Metrics */
- /* */
- /* <Description> */
- /* A structure used to hold the big metrics of a given glyph bitmap */
- /* in a TrueType or OpenType font. These are usually found in the */
- /* `EBDT' (Microsoft) or `bloc' (Apple) table. */
- /* */
- /* <Fields> */
- /* height :: The glyph height in pixels. */
- /* */
- /* width :: The glyph width in pixels. */
- /* */
- /* horiBearingX :: The horizontal left bearing. */
- /* */
- /* horiBearingY :: The horizontal top bearing. */
- /* */
- /* horiAdvance :: The horizontal advance. */
- /* */
- /* vertBearingX :: The vertical left bearing. */
- /* */
- /* vertBearingY :: The vertical top bearing. */
- /* */
- /* vertAdvance :: The vertical advance. */
- /* */
- typedef struct TT_SBit_Metrics_
- {
- FT_Byte height;
- FT_Byte width;
-
- FT_Char horiBearingX;
- FT_Char horiBearingY;
- FT_Byte horiAdvance;
-
- FT_Char vertBearingX;
- FT_Char vertBearingY;
- FT_Byte vertAdvance;
-
- } TT_SBit_Metrics;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_SBit_Small_Metrics */
- /* */
- /* <Description> */
- /* A structure used to hold the small metrics of a given glyph bitmap */
- /* in a TrueType or OpenType font. These are usually found in the */
- /* `EBDT' (Microsoft) or the `bdat' (Apple) table. */
- /* */
- /* <Fields> */
- /* height :: The glyph height in pixels. */
- /* */
- /* width :: The glyph width in pixels. */
- /* */
- /* bearingX :: The left-side bearing. */
- /* */
- /* bearingY :: The top-side bearing. */
- /* */
- /* advance :: The advance width or height. */
- /* */
- typedef struct TT_SBit_Small_Metrics_
- {
- FT_Byte height;
- FT_Byte width;
-
- FT_Char bearingX;
- FT_Char bearingY;
- FT_Byte advance;
-
- } TT_SBit_Small_Metrics;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_SBit_Line_Metrics */
- /* */
- /* <Description> */
- /* A structure used to describe the text line metrics of a given */
- /* bitmap strike, for either a horizontal or vertical layout. */
- /* */
- /* <Fields> */
- /* ascender :: The ascender in pixels. */
- /* */
- /* descender :: The descender in pixels. */
- /* */
- /* max_width :: The maximum glyph width in pixels. */
- /* */
- /* caret_slope_enumerator :: Rise of the caret slope, typically set */
- /* to 1 for non-italic fonts. */
- /* */
- /* caret_slope_denominator :: Rise of the caret slope, typically set */
- /* to 0 for non-italic fonts. */
- /* */
- /* caret_offset :: Offset in pixels to move the caret for */
- /* proper positioning. */
- /* */
- /* min_origin_SB :: Minimum of horiBearingX (resp. */
- /* vertBearingY). */
- /* min_advance_SB :: Minimum of */
- /* */
- /* horizontal advance - */
- /* ( horiBearingX + width ) */
- /* */
- /* resp. */
- /* */
- /* vertical advance - */
- /* ( vertBearingY + height ) */
- /* */
- /* max_before_BL :: Maximum of horiBearingY (resp. */
- /* vertBearingY). */
- /* */
- /* min_after_BL :: Minimum of */
- /* */
- /* horiBearingY - height */
- /* */
- /* resp. */
- /* */
- /* vertBearingX - width */
- /* */
- /* pads :: Unused (to make the size of the record */
- /* a multiple of 32 bits. */
- /* */
- typedef struct TT_SBit_Line_Metrics_
- {
- FT_Char ascender;
- FT_Char descender;
- FT_Byte max_width;
- FT_Char caret_slope_numerator;
- FT_Char caret_slope_denominator;
- FT_Char caret_offset;
- FT_Char min_origin_SB;
- FT_Char min_advance_SB;
- FT_Char max_before_BL;
- FT_Char min_after_BL;
- FT_Char pads[2];
-
- } TT_SBit_Line_Metrics;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_SBit_Range */
- /* */
- /* <Description> */
- /* A TrueType/OpenType subIndexTable as defined in the `EBLC' */
- /* (Microsoft) or `bloc' (Apple) tables. */
- /* */
- /* <Fields> */
- /* first_glyph :: The first glyph index in the range. */
- /* */
- /* last_glyph :: The last glyph index in the range. */
- /* */
- /* index_format :: The format of index table. Valid values are 1 */
- /* to 5. */
- /* */
- /* image_format :: The format of `EBDT' image data. */
- /* */
- /* image_offset :: The offset to image data in `EBDT'. */
- /* */
- /* image_size :: For index formats 2 and 5. This is the size in */
- /* bytes of each glyph bitmap. */
- /* */
- /* big_metrics :: For index formats 2 and 5. This is the big */
- /* metrics for each glyph bitmap. */
- /* */
- /* num_glyphs :: For index formats 4 and 5. This is the number of */
- /* glyphs in the code array. */
- /* */
- /* glyph_offsets :: For index formats 1 and 3. */
- /* */
- /* glyph_codes :: For index formats 4 and 5. */
- /* */
- /* table_offset :: The offset of the index table in the `EBLC' */
- /* table. Only used during strike loading. */
- /* */
- typedef struct TT_SBit_Range
- {
- FT_UShort first_glyph;
- FT_UShort last_glyph;
-
- FT_UShort index_format;
- FT_UShort image_format;
- FT_ULong image_offset;
-
- FT_ULong image_size;
- TT_SBit_Metrics metrics;
- FT_ULong num_glyphs;
-
- FT_ULong* glyph_offsets;
- FT_UShort* glyph_codes;
-
- FT_ULong table_offset;
-
- } TT_SBit_Range;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_SBit_Strike */
- /* */
- /* <Description> */
- /* A structure used describe a given bitmap strike in the `EBLC' */
- /* (Microsoft) or `bloc' (Apple) tables. */
- /* */
- /* <Fields> */
- /* num_index_ranges :: The number of index ranges. */
- /* */
- /* index_ranges :: An array of glyph index ranges. */
- /* */
- /* color_ref :: Unused. `color_ref' is put in for future */
- /* enhancements, but these fields are already */
- /* in use by other platforms (e.g. Newton). */
- /* For details, please see */
- /* */
- /* http://fonts.apple.com/ */
- /* TTRefMan/RM06/Chap6bloc.html */
- /* */
- /* hori :: The line metrics for horizontal layouts. */
- /* */
- /* vert :: The line metrics for vertical layouts. */
- /* */
- /* start_glyph :: The lowest glyph index for this strike. */
- /* */
- /* end_glyph :: The highest glyph index for this strike. */
- /* */
- /* x_ppem :: The number of horizontal pixels per EM. */
- /* */
- /* y_ppem :: The number of vertical pixels per EM. */
- /* */
- /* bit_depth :: The bit depth. Valid values are 1, 2, 4, */
- /* and 8. */
- /* */
- /* flags :: Is this a vertical or horizontal strike? For */
- /* details, please see */
- /* */
- /* http://fonts.apple.com/ */
- /* TTRefMan/RM06/Chap6bloc.html */
- /* */
- typedef struct TT_SBit_Strike_
- {
- FT_Int num_ranges;
- TT_SBit_Range* sbit_ranges;
- FT_ULong ranges_offset;
-
- FT_ULong color_ref;
-
- TT_SBit_Line_Metrics hori;
- TT_SBit_Line_Metrics vert;
-
- FT_UShort start_glyph;
- FT_UShort end_glyph;
-
- FT_Byte x_ppem;
- FT_Byte y_ppem;
-
- FT_Byte bit_depth;
- FT_Char flags;
-
- } TT_SBit_Strike;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_SBit_Component */
- /* */
- /* <Description> */
- /* A simple structure to describe a compound sbit element. */
- /* */
- /* <Fields> */
- /* glyph_code :: The element's glyph index. */
- /* */
- /* x_offset :: The element's left bearing. */
- /* */
- /* y_offset :: The element's top bearing. */
- /* */
- typedef struct TT_SBit_Component_
- {
- FT_UShort glyph_code;
- FT_Char x_offset;
- FT_Char y_offset;
-
- } TT_SBit_Component;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_SBit_Scale */
- /* */
- /* <Description> */
- /* A structure used describe a given bitmap scaling table, as defined */
- /* in the `EBSC' table. */
- /* */
- /* <Fields> */
- /* hori :: The horizontal line metrics. */
- /* */
- /* vert :: The vertical line metrics. */
- /* */
- /* x_ppem :: The number of horizontal pixels per EM. */
- /* */
- /* y_ppem :: The number of vertical pixels per EM. */
- /* */
- /* x_ppem_substitute :: Substitution x_ppem value. */
- /* */
- /* y_ppem_substitute :: Substitution y_ppem value. */
- /* */
- typedef struct TT_SBit_Scale_
- {
- TT_SBit_Line_Metrics hori;
- TT_SBit_Line_Metrics vert;
-
- FT_Byte x_ppem;
- FT_Byte y_ppem;
-
- FT_Byte x_ppem_substitute;
- FT_Byte y_ppem_substitute;
-
- } TT_SBit_Scale;
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /*** ***/
- /*** ***/
- /*** POSTSCRIPT GLYPH NAMES SUPPORT ***/
- /*** ***/
- /*** ***/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_Post_20 */
- /* */
- /* <Description> */
- /* Postscript names sub-table, format 2.0. Stores the PS name of */
- /* each glyph in the font face. */
- /* */
- /* <Fields> */
- /* num_glyphs :: The number of named glyphs in the table. */
- /* */
- /* num_names :: The number of PS names stored in the table. */
- /* */
- /* glyph_indices :: The indices of the glyphs in the names arrays. */
- /* */
- /* glyph_names :: The PS names not in Mac Encoding. */
- /* */
- typedef struct TT_Post_20_
- {
- FT_UShort num_glyphs;
- FT_UShort num_names;
- FT_UShort* glyph_indices;
- FT_Char** glyph_names;
-
- } TT_Post_20;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_Post_25 */
- /* */
- /* <Description> */
- /* Postscript names sub-table, format 2.5. Stores the PS name of */
- /* each glyph in the font face. */
- /* */
- /* <Fields> */
- /* num_glyphs :: The number of glyphs in the table. */
- /* */
- /* offsets :: An array of signed offsets in a normal Mac */
- /* Postscript name encoding. */
- /* */
- typedef struct TT_Post_25_
- {
- FT_UShort num_glyphs;
- FT_Char* offsets;
-
- } TT_Post_25;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_Post_Names */
- /* */
- /* <Description> */
- /* Postscript names table, either format 2.0 or 2.5. */
- /* */
- /* <Fields> */
- /* loaded :: A flag to indicate whether the PS names are loaded. */
- /* */
- /* format_20 :: The sub-table used for format 2.0. */
- /* */
- /* format_25 :: The sub-table used for format 2.5. */
- /* */
- typedef struct TT_Post_Names_
- {
- FT_Bool loaded;
-
- union
- {
- TT_Post_20 format_20;
- TT_Post_25 format_25;
-
- } names;
-
- } TT_Post_Names;
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /*** ***/
- /*** ***/
- /*** TRUETYPE CHARMAPS SUPPORT ***/
- /*** ***/
- /*** ***/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /* format 0 */
-
- typedef struct TT_CMap0_
- {
- FT_ULong language; /* for Mac fonts (originally ushort) */
-
- FT_Byte* glyphIdArray;
-
- } TT_CMap0;
-
-
- /* format 2 */
-
- typedef struct TT_CMap2SubHeader_
- {
- FT_UShort firstCode; /* first valid low byte */
- FT_UShort entryCount; /* number of valid low bytes */
- FT_Short idDelta; /* delta value to glyphIndex */
- FT_UShort idRangeOffset; /* offset from here to 1st code */
-
- } TT_CMap2SubHeader;
-
-
- typedef struct TT_CMap2_
- {
- FT_ULong language; /* for Mac fonts (originally ushort) */
-
- FT_UShort* subHeaderKeys;
- /* high byte mapping table */
- /* value = subHeader index * 8 */
-
- TT_CMap2SubHeader* subHeaders;
- FT_UShort* glyphIdArray;
- FT_UShort numGlyphId; /* control value */
-
- } TT_CMap2;
-
-
- /* format 4 */
-
- typedef struct TT_CMap4Segment_
- {
- FT_UShort endCount;
- FT_UShort startCount;
- FT_Short idDelta;
- FT_UShort idRangeOffset;
-
- } TT_CMap4Segment;
-
-
- typedef struct TT_CMap4_
- {
- FT_ULong language; /* for Mac fonts (originally ushort) */
-
- FT_UShort segCountX2; /* number of segments * 2 */
- FT_UShort searchRange; /* these parameters can be used */
- FT_UShort entrySelector; /* for a binary search */
- FT_UShort rangeShift;
-
- TT_CMap4Segment* segments;
- FT_UShort* glyphIdArray;
- FT_UShort numGlyphId; /* control value */
-
- TT_CMap4Segment* last_segment; /* last used segment; this is a small */
- /* cache to potentially increase speed */
- } TT_CMap4;
-
-
- /* format 6 */
-
- typedef struct TT_CMap6_
- {
- FT_ULong language; /* for Mac fonts (originally ushort) */
-
- FT_UShort firstCode; /* first character code of subrange */
- FT_UShort entryCount; /* number of character codes in subrange */
-
- FT_UShort* glyphIdArray;
-
- } TT_CMap6;
-
-
- /* auxiliary table for format 8 and 12 */
-
- typedef struct TT_CMapGroup_
- {
- FT_ULong startCharCode;
- FT_ULong endCharCode;
- FT_ULong startGlyphID;
-
- } TT_CMapGroup;
-
-
- /* FreeType handles format 8 and 12 identically. It is not necessary to
- cover mixed 16bit and 32bit codes since FreeType always uses FT_ULong
- for input character codes -- converting Unicode surrogates to 32bit
- character codes must be done by the application. */
-
- typedef struct TT_CMap8_12_
- {
- FT_ULong language; /* for Mac fonts */
-
- FT_ULong nGroups;
- TT_CMapGroup* groups;
-
- TT_CMapGroup* last_group; /* last used group; this is a small */
- /* cache to potentially increase speed */
- } TT_CMap8_12;
-
-
- /* format 10 */
-
- typedef struct TT_CMap10_
- {
- FT_ULong language; /* for Mac fonts */
-
- FT_ULong startCharCode; /* first character covered */
- FT_ULong numChars; /* number of characters covered */
-
- FT_UShort* glyphs;
-
- } TT_CMap10;
-
-
- typedef struct TT_CMapTable_ TT_CMapTable;
-
-
- typedef FT_UInt
- (*TT_CharMap_Func)( TT_CMapTable* charmap,
- FT_ULong char_code );
-
-
- /* charmap table */
- struct TT_CMapTable_
- {
- FT_UShort platformID;
- FT_UShort platformEncodingID;
- FT_UShort format;
- FT_ULong length; /* must be ulong for formats 8, 10, and 12 */
-
- FT_Bool loaded;
- FT_ULong offset;
-
- union
- {
- TT_CMap0 cmap0;
- TT_CMap2 cmap2;
- TT_CMap4 cmap4;
- TT_CMap6 cmap6;
- TT_CMap8_12 cmap8_12;
- TT_CMap10 cmap10;
- } c;
-
- TT_CharMap_Func get_index;
- };
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_CharMapRec */
- /* */
- /* <Description> */
- /* The TrueType character map object type. */
- /* */
- /* <Fields> */
- /* root :: The parent character map structure. */
- /* */
- /* cmap :: The used character map. */
- /* */
- typedef struct TT_CharMapRec_
- {
- FT_CharMapRec root;
- TT_CMapTable cmap;
-
- } TT_CharMapRec;
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /*** ***/
- /*** ***/
- /*** ORIGINAL TT_FACE CLASS DEFINITION ***/
- /*** ***/
- /*** ***/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* This structure/class is defined here because it is common to the */
- /* following formats: TTF, OpenType-TT, and OpenType-CFF. */
- /* */
- /* Note, however, that the classes TT_Size, TT_GlyphSlot, and TT_CharMap */
- /* are not shared between font drivers, and are thus defined normally in */
- /* `ttobjs.h'. */
- /* */
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* <Type> */
- /* TT_Face */
- /* */
- /* <Description> */
- /* A handle to a TrueType face/font object. A TT_Face encapsulates */
- /* the resolution and scaling independent parts of a TrueType font */
- /* resource. */
- /* */
- /* <Note> */
- /* The TT_Face structure is also used as a `parent class' for the */
- /* OpenType-CFF class (T2_Face). */
- /* */
- typedef struct TT_FaceRec_* TT_Face;
-
-
- /*************************************************************************/
- /* */
- /* <Type> */
- /* TT_CharMap */
- /* */
- /* <Description> */
- /* A handle to a TrueType character mapping object. */
- /* */
- typedef struct TT_CharMapRec_* TT_CharMap;
-
-
- /* a function type used for the truetype bytecode interpreter hooks */
- typedef FT_Error
- (*TT_Interpreter)( void* exec_context );
-
- /* forward declaration */
- typedef struct TT_Loader_ TT_Loader;
-
-
- /*************************************************************************/
- /* */
- /* <FuncType> */
- /* TT_Goto_Table_Func */
- /* */
- /* <Description> */
- /* Seeks a stream to the start of a given TrueType table. */
- /* */
- /* <Input> */
- /* face :: A handle to the target face object. */
- /* */
- /* tag :: A 4-byte tag used to name the table. */
- /* */
- /* stream :: The input stream. */
- /* */
- /* <Output> */
- /* length :: The length of the table in bytes. Set to 0 if not */
- /* needed. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
- /* <Note> */
- /* The stream cursor must be at the font file's origin. */
- /* */
- typedef FT_Error
- (*TT_Goto_Table_Func)( TT_Face face,
- FT_ULong tag,
- FT_Stream stream,
- FT_ULong* length );
-
-
- /*************************************************************************/
- /* */
- /* <FuncType> */
- /* TT_Access_Glyph_Frame_Func */
- /* */
- /* <Description> */
- /* Seeks a stream to the start of a given glyph element, and opens a */
- /* frame for it. */
- /* */
- /* <Input> */
- /* loader :: The current TrueType glyph loader object. */
- /* */
- /* glyph index :: The index of the glyph to access. */
- /* */
- /* offset :: The offset of the glyph according to the */
- /* `locations' table. */
- /* */
- /* byte_count :: The size of the frame in bytes. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
- /* <Note> */
- /* This function is normally equivalent to FILE_Seek(offset) */
- /* followed by ACCESS_Frame(byte_count) with the loader's stream, but */
- /* alternative formats (e.g. compressed ones) might use something */
- /* different. */
- /* */
- typedef FT_Error
- (*TT_Access_Glyph_Frame_Func)( TT_Loader* loader,
- FT_UInt glyph_index,
- FT_ULong offset,
- FT_UInt byte_count );
-
-
- /*************************************************************************/
- /* */
- /* <FuncType> */
- /* TT_Load_Glyph_Element_Func */
- /* */
- /* <Description> */
- /* Reads one glyph element (its header, a simple glyph, or a */
- /* composite) from the loader's current stream frame. */
- /* */
- /* <Input> */
- /* loader :: The current TrueType glyph loader object. */
- /* */
- /* <Return> */
- /* FreeType error code. 0 means success. */
- /* */
- typedef FT_Error
- (*TT_Load_Glyph_Element_Func)( TT_Loader* loader );
-
-
- /*************************************************************************/
- /* */
- /* <FuncType> */
- /* TT_Forget_Glyph_Frame_Func */
- /* */
- /* <Description> */
- /* Closes the current loader stream frame for the glyph. */
- /* */
- /* <Input> */
- /* loader :: The current TrueType glyph loader object. */
- /* */
- typedef void
- (*TT_Forget_Glyph_Frame_Func)( TT_Loader* loader );
-
-
-
- /*************************************************************************/
- /* */
- /* TrueType Face Type */
- /* */
- /* <Struct> */
- /* TT_Face */
- /* */
- /* <Description> */
- /* The TrueType face class. These objects model the resolution and */
- /* point-size independent data found in a TrueType font file. */
- /* */
- /* <Fields> */
- /* root :: The base FT_Face structure, managed by the */
- /* base layer. */
- /* */
- /* ttc_header :: The TrueType collection header, used when */
- /* the file is a `ttc' rather than a `ttf'. */
- /* For ordinary font files, the field */
- /* `ttc_header.count' is set to 0. */
- /* */
- /* format_tag :: The font format tag. */
- /* */
- /* num_tables :: The number of TrueType tables in this font */
- /* file. */
- /* */
- /* dir_tables :: The directory of TrueType tables for this */
- /* font file. */
- /* */
- /* header :: The font's font header (`head' table). */
- /* Read on font opening. */
- /* */
- /* horizontal :: The font's horizontal header (`hhea' */
- /* table). This field also contains the */
- /* associated horizontal metrics table */
- /* (`hmtx'). */
- /* */
- /* max_profile :: The font's maximum profile table. Read on */
- /* font opening. Note that some maximum */
- /* values cannot be taken directly from this */
- /* table. We thus define additional fields */
- /* below to hold the computed maxima. */
- /* */
- /* max_components :: The maximum number of glyph components */
- /* required to load any composite glyph from */
- /* this font. Used to size the load stack. */
- /* */
- /* vertical_info :: A boolean which is set when the font file */
- /* contains vertical metrics. If not, the */
- /* value of the `vertical' field is */
- /* undefined. */
- /* */
- /* vertical :: The font's vertical header (`vhea' table). */
- /* This field also contains the associated */
- /* vertical metrics table (`vmtx'), if found. */
- /* IMPORTANT: The contents of this field is */
- /* undefined if the `verticalInfo' field is */
- /* unset. */
- /* */
- /* num_names :: The number of name records within this */
- /* TrueType font. */
- /* */
- /* name_table :: The table of name records (`name'). */
- /* */
- /* os2 :: The font's OS/2 table (`OS/2'). */
- /* */
- /* postscript :: The font's PostScript table (`post' */
- /* table). The PostScript glyph names are */
- /* not loaded by the driver on face opening. */
- /* See the `ttpost' module for more details. */
- /* */
- /* num_charmaps :: The number of character mappings in the */
- /* font. */
- /* */
- /* charmaps :: The array of charmap objects for this font */
- /* file. Note that this field is a typeless */
- /* pointer. The Reason is that the format of */
- /* charmaps varies with the underlying font */
- /* format and cannot be determined here. */
- /* */
- /* goto_table :: A function called by each TrueType table */
- /* loader to position a stream's cursor to */
- /* the start of a given table according to */
- /* its tag. It defaults to TT_Goto_Face but */
- /* can be different for strange formats (e.g. */
- /* Type 42). */
- /* */
- /* access_glyph_frame :: XXX */
- /* */
- /* read_glyph_header :: XXX */
- /* */
- /* read_simple_glyph :: XXX */
- /* */
- /* read_composite_glyph :: XXX */
- /* */
- /* forget_glyph_frame :: XXX */
- /* */
- /* sfnt :: A pointer to the SFNT `driver' interface. */
- /* */
- /* psnames :: A pointer to the `PSNames' module */
- /* interface. */
- /* */
- /* hdmx :: The face's horizontal device metrics */
- /* (`hdmx' table). This table is optional in */
- /* TrueType/OpenType fonts. */
- /* */
- /* gasp :: The grid-fitting and scaling properties */
- /* table (`gasp'). This table is optional in */
- /* TrueType/OpenType fonts. */
- /* */
- /* pclt :: XXX */
- /* */
- /* num_sbit_strikes :: The number of sbit strikes, i.e., bitmap */
- /* sizes, embedded in this font. */
- /* */
- /* sbit_strikes :: An array of sbit strikes embedded in this */
- /* font. This table is optional in a */
- /* TrueType/OpenType font. */
- /* */
- /* num_sbit_scales :: The number of sbit scales for this font. */
- /* */
- /* sbit_scales :: Array of sbit scales embedded in this */
- /* font. This table is optional in a */
- /* TrueType/OpenType font. */
- /* */
- /* postscript_names :: A table used to store the Postscript names */
- /* of the glyphs for this font. See the */
- /* file `ttconfig.h' for comments on the */
- /* TT_CONFIG_OPTION_POSTSCRIPT_NAMES option. */
- /* */
- /* num_locations :: The number of glyph locations in this */
- /* TrueType file. This should be */
- /* identical to the number of glyphs. */
- /* Ignored for Type 2 fonts. */
- /* */
- /* glyph_locations :: An array of longs. These are offsets to */
- /* glyph data within the `glyf' table. */
- /* Ignored for Type 2 font faces. */
- /* */
- /* font_program_size :: Size in bytecodes of the face's font */
- /* program. 0 if none defined. Ignored for */
- /* Type 2 fonts. */
- /* */
- /* font_program :: The face's font program (bytecode stream) */
- /* executed at load time, also used during */
- /* glyph rendering. Comes from the `fpgm' */
- /* table. Ignored for Type 2 font fonts. */
- /* */
- /* cvt_program_size :: The size in bytecodes of the face's cvt */
- /* program. Ignored for Type 2 fonts. */
- /* */
- /* cvt_program :: The face's cvt program (bytecode stream) */
- /* executed each time an instance/size is */
- /* changed/reset. Comes from the `prep' */
- /* table. Ignored for Type 2 fonts. */
- /* */
- /* cvt_size :: Size of the control value table (in */
- /* entries). Ignored for Type 2 fonts. */
- /* */
- /* cvt :: The face's original control value table. */
- /* Coordinates are expressed in unscaled font */
- /* units. Comes from the `cvt ' table. */
- /* Ignored for Type 2 fonts. */
- /* */
- /* num_kern_pairs :: The number of kerning pairs present in the */
- /* font file. The engine only loads the */
- /* first horizontal format 0 kern table it */
- /* finds in the font file. You should use */
- /* the `ttxkern' structures if you want to */
- /* access other kerning tables. Ignored */
- /* for Type 2 fonts. */
- /* */
- /* kern_table_index :: The index of the kerning table in the font */
- /* kerning directory. Only used by the */
- /* ttxkern extension to avoid data */
- /* duplication. Ignored for Type 2 fonts. */
- /* */
- /* interpreter :: A pointer to the TrueType bytecode */
- /* interpreters field is also used to hook */
- /* the debugger in `ttdebug'. */
- /* */
- /* extra :: XXX */
- /* */
- typedef struct TT_FaceRec_
- {
- FT_FaceRec root;
-
- TTC_Header ttc_header;
-
- FT_ULong format_tag;
- FT_UShort num_tables;
- TT_Table* dir_tables;
-
- TT_Header header; /* TrueType header table */
- TT_HoriHeader horizontal; /* TrueType horizontal header */
-
- TT_MaxProfile max_profile;
- FT_ULong max_components;
-
- FT_Bool vertical_info;
- TT_VertHeader vertical; /* TT Vertical header, if present */
-
- FT_UShort num_names; /* number of name records */
- TT_NameTable name_table; /* name table */
-
- TT_OS2 os2; /* TrueType OS/2 table */
- TT_Postscript postscript; /* TrueType Postscript table */
-
- FT_Int num_charmaps;
- TT_CharMap charmaps; /* array of TT_CharMapRec */
-
- TT_Goto_Table_Func goto_table;
-
- TT_Access_Glyph_Frame_Func access_glyph_frame;
- TT_Load_Glyph_Element_Func read_glyph_header;
- TT_Load_Glyph_Element_Func read_simple_glyph;
- TT_Load_Glyph_Element_Func read_composite_glyph;
- TT_Forget_Glyph_Frame_Func forget_glyph_frame;
-
- /* a typeless pointer to the SFNT_Interface table used to load */
- /* the basic TrueType tables in the face object */
- void* sfnt;
-
- /* a typeless pointer to the PSNames_Interface table used to */
- /* handle glyph names <-> unicode & Mac values */
- void* psnames;
-
- /***********************************************************************/
- /* */
- /* Optional TrueType/OpenType tables */
- /* */
- /***********************************************************************/
-
- /* horizontal device metrics */
- TT_Hdmx hdmx;
-
- /* grid-fitting and scaling table */
- TT_Gasp gasp; /* the `gasp' table */
-
- /* PCL 5 table */
- TT_PCLT pclt;
-
- /* embedded bitmaps support */
- FT_Int num_sbit_strikes;
- TT_SBit_Strike* sbit_strikes;
-
- FT_Int num_sbit_scales;
- TT_SBit_Scale* sbit_scales;
-
- /* postscript names table */
- TT_Post_Names postscript_names;
-
-
- /***********************************************************************/
- /* */
- /* TrueType-specific fields (ignored by the OTF-Type2 driver) */
- /* */
- /***********************************************************************/
-
- /* the glyph locations */
- FT_UShort num_locations;
- FT_Long* glyph_locations;
-
- /* the font program, if any */
- FT_ULong font_program_size;
- FT_Byte* font_program;
-
- /* the cvt program, if any */
- FT_ULong cvt_program_size;
- FT_Byte* cvt_program;
-
- /* the original, unscaled, control value table */
- FT_ULong cvt_size;
- FT_Short* cvt;
-
- /* the format 0 kerning table, if any */
- FT_Int num_kern_pairs;
- FT_Int kern_table_index;
- TT_Kern_0_Pair* kern_pairs;
-
- /* A pointer to the bytecode interpreter to use. This is also */
- /* used to hook the debugger for the `ttdebug' utility. */
- TT_Interpreter interpreter;
-
-
- /***********************************************************************/
- /* */
- /* Other tables or fields. This is used by derivative formats like */
- /* OpenType. */
- /* */
- /***********************************************************************/
-
- FT_Generic extra;
-
- } TT_FaceRec;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* TT_GlyphZone */
- /* */
- /* <Description> */
- /* A glyph zone is used to load, scale and hint glyph outline */
- /* coordinates. */
- /* */
- /* <Fields> */
- /* memory :: A handle to the memory manager. */
- /* */
- /* max_points :: The maximal size in points of the zone. */
- /* */
- /* max_contours :: Max size in links contours of thez one. */
- /* */
- /* n_points :: The current number of points in the zone. */
- /* */
- /* n_contours :: The current number of contours in the zone. */
- /* */
- /* org :: The original glyph coordinates (font */
- /* units/scaled). */
- /* */
- /* cur :: The current glyph coordinates (scaled/hinted). */
- /* */
- /* tags :: The point control tags. */
- /* */
- /* contours :: The contours end points. */
- /* */
- typedef struct TT_GlyphZone_
- {
- FT_Memory memory;
- FT_UShort max_points;
- FT_UShort max_contours;
- FT_UShort n_points; /* number of points in zone */
- FT_Short n_contours; /* number of contours */
-
- FT_Vector* org; /* original point coordinates */
- FT_Vector* cur; /* current point coordinates */
-
- FT_Byte* tags; /* current touch flags */
- FT_UShort* contours; /* contour end points */
-
- } TT_GlyphZone;
-
-
- /* handle to execution context */
- typedef struct TT_ExecContextRec_* TT_ExecContext;
-
- /* glyph loader structure */
- struct TT_Loader_
- {
- FT_Face face;
- FT_Size size;
- FT_GlyphSlot glyph;
- FT_GlyphLoader* gloader;
-
- FT_ULong load_flags;
- FT_UInt glyph_index;
-
- FT_Stream stream;
- FT_Int byte_len;
-
- FT_Short n_contours;
- FT_BBox bbox;
- FT_Int left_bearing;
- FT_Int advance;
- FT_Int linear;
- FT_Bool linear_def;
- FT_Bool preserve_pps;
- FT_Vector pp1;
- FT_Vector pp2;
-
- FT_ULong glyf_offset;
-
- /* the zone where we load our glyphs */
- TT_GlyphZone base;
- TT_GlyphZone zone;
-
- TT_ExecContext exec;
- FT_Byte* instructions;
- FT_ULong ins_pos;
-
- /* for possible extensibility in other formats */
- void* other;
-
- };
-
-
-FT_END_HEADER
-
-#endif /* __TTTYPES_H__ */
-
-
-/* END */
projects / rrdtool.git / blobdiff