kc3-lang/freetype/include/internal/tttypes.h
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Hash : d9c3f151
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Date : 2015-02-17T09:21:26
[truetype] More signedness fixes. * include/internal/tttypes.h, src/truetype/ttinterp.h, src/truetype/ttobjs.h, src/truetype/ttinterp.c, src/truetype/ttobjs.c: Apply.
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include/internal/tttypes.h
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/***************************************************************************/ /* */ /* tttypes.h */ /* */ /* Basic SFNT/TrueType type definitions and interface (specification */ /* only). */ /* */ /* Copyright 1996-2015 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 #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT #include FT_MULTIPLE_MASTERS_H #endif FT_BEGIN_HEADER /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /*** ***/ /*** ***/ /*** REQUIRED TRUETYPE/OPENTYPE TABLES DEFINITIONS ***/ /*** ***/ /*** ***/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* */ /* <Struct> */ /* TTC_HeaderRec */ /* */ /* <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_HeaderRec_ { FT_ULong tag; FT_Fixed version; FT_Long count; FT_ULong* offsets; } TTC_HeaderRec; /*************************************************************************/ /* */ /* <Struct> */ /* SFNT_HeaderRec */ /* */ /* <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_HeaderRec_ { FT_ULong format_tag; FT_UShort num_tables; FT_UShort search_range; FT_UShort entry_selector; FT_UShort range_shift; FT_ULong offset; /* not in file */ } SFNT_HeaderRec, *SFNT_Header; /*************************************************************************/ /* */ /* <Struct> */ /* TT_TableRec */ /* */ /* <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_TableRec_ { FT_ULong Tag; /* table type */ FT_ULong CheckSum; /* table checksum */ FT_ULong Offset; /* table file offset */ FT_ULong Length; /* table length */ } TT_TableRec, *TT_Table; /*************************************************************************/ /* */ /* <Struct> */ /* WOFF_HeaderRec */ /* */ /* <Description> */ /* WOFF file format header. */ /* */ /* <Fields> */ /* See */ /* */ /* http://www.w3.org/TR/WOFF/#WOFFHeader */ /* */ typedef struct WOFF_HeaderRec_ { FT_ULong signature; FT_ULong flavor; FT_ULong length; FT_UShort num_tables; FT_UShort reserved; FT_ULong totalSfntSize; FT_UShort majorVersion; FT_UShort minorVersion; FT_ULong metaOffset; FT_ULong metaLength; FT_ULong metaOrigLength; FT_ULong privOffset; FT_ULong privLength; } WOFF_HeaderRec, *WOFF_Header; /*************************************************************************/ /* */ /* <Struct> */ /* WOFF_TableRec */ /* */ /* <Description> */ /* This structure describes a given table of a WOFF font. */ /* */ /* <Fields> */ /* Tag :: A four-bytes tag describing the table. */ /* */ /* Offset :: The offset of the table from the start of the WOFF */ /* font in its resource. */ /* */ /* CompLength :: Compressed table length (in bytes). */ /* */ /* OrigLength :: Unompressed table length (in bytes). */ /* */ /* CheckSum :: The table checksum. This value can be ignored. */ /* */ /* OrigOffset :: The uncompressed table file offset. This value gets */ /* computed while constructing the (uncompressed) SFNT */ /* header. It is not contained in the WOFF file. */ /* */ typedef struct WOFF_TableRec_ { FT_ULong Tag; /* table ID */ FT_ULong Offset; /* table file offset */ FT_ULong CompLength; /* compressed table length */ FT_ULong OrigLength; /* uncompressed table length */ FT_ULong CheckSum; /* uncompressed checksum */ FT_ULong OrigOffset; /* uncompressed table file offset */ /* (not in the WOFF file) */ } WOFF_TableRec, *WOFF_Table; /*************************************************************************/ /* */ /* <Struct> */ /* TT_LongMetricsRec */ /* */ /* <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_LongMetricsRec_ { FT_UShort advance; FT_Short bearing; } TT_LongMetricsRec, *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_NameEntryRec */ /* */ /* <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_NameEntryRec_ { FT_UShort platformID; FT_UShort encodingID; FT_UShort languageID; FT_UShort nameID; FT_UShort stringLength; FT_ULong stringOffset; /* this last field is not defined in the spec */ /* but used by the FreeType engine */ FT_Byte* string; } TT_NameEntryRec, *TT_NameEntry; /*************************************************************************/ /* */ /* <Struct> */ /* TT_NameTableRec */ /* */ /* <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. */ /* */ /* stream :: the file's input stream. */ /* */ typedef struct TT_NameTableRec_ { FT_UShort format; FT_UInt numNameRecords; FT_UInt storageOffset; TT_NameEntryRec* names; FT_Stream stream; } TT_NameTableRec, *TT_NameTable; /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /*** ***/ /*** ***/ /*** OPTIONAL TRUETYPE/OPENTYPE TABLES DEFINITIONS ***/ /*** ***/ /*** ***/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* */ /* <Struct> */ /* TT_GaspRangeRec */ /* */ /* <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_GaspRangeRec_ { FT_UShort maxPPEM; FT_UShort gaspFlag; } TT_GaspRangeRec, *TT_GaspRange; #define TT_GASP_GRIDFIT 0x01 #define TT_GASP_DOGRAY 0x02 /*************************************************************************/ /* */ /* <Struct> */ /* TT_GaspRec */ /* */ /* <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_GaspRec; /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /*** ***/ /*** ***/ /*** EMBEDDED BITMAPS SUPPORT ***/ /*** ***/ /*** ***/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* */ /* <Struct> */ /* TT_SBit_MetricsRec */ /* */ /* <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_MetricsRec_ { FT_UShort height; FT_UShort width; FT_Short horiBearingX; FT_Short horiBearingY; FT_UShort horiAdvance; FT_Short vertBearingX; FT_Short vertBearingY; FT_UShort vertAdvance; } TT_SBit_MetricsRec, *TT_SBit_Metrics; /*************************************************************************/ /* */ /* <Struct> */ /* TT_SBit_SmallMetricsRec */ /* */ /* <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_SmallMetricsRec, *TT_SBit_SmallMetrics; /*************************************************************************/ /* */ /* <Struct> */ /* TT_SBit_LineMetricsRec */ /* */ /* <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_LineMetricsRec_ { 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_LineMetricsRec, *TT_SBit_LineMetrics; /*************************************************************************/ /* */ /* <Struct> */ /* TT_SBit_RangeRec */ /* */ /* <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_RangeRec_ { 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_MetricsRec metrics; FT_ULong num_glyphs; FT_ULong* glyph_offsets; FT_UShort* glyph_codes; FT_ULong table_offset; } TT_SBit_RangeRec, *TT_SBit_Range; /*************************************************************************/ /* */ /* <Struct> */ /* TT_SBit_StrikeRec */ /* */ /* <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_StrikeRec_ { FT_Int num_ranges; TT_SBit_Range sbit_ranges; FT_ULong ranges_offset; FT_ULong color_ref; TT_SBit_LineMetricsRec hori; TT_SBit_LineMetricsRec 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_StrikeRec, *TT_SBit_Strike; /*************************************************************************/ /* */ /* <Struct> */ /* TT_SBit_ComponentRec */ /* */ /* <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_ComponentRec_ { FT_UShort glyph_code; FT_Char x_offset; FT_Char y_offset; } TT_SBit_ComponentRec, *TT_SBit_Component; /*************************************************************************/ /* */ /* <Struct> */ /* TT_SBit_ScaleRec */ /* */ /* <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_ScaleRec_ { TT_SBit_LineMetricsRec hori; TT_SBit_LineMetricsRec vert; FT_Byte x_ppem; FT_Byte y_ppem; FT_Byte x_ppem_substitute; FT_Byte y_ppem_substitute; } TT_SBit_ScaleRec, *TT_SBit_Scale; /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /*** ***/ /*** ***/ /*** POSTSCRIPT GLYPH NAMES SUPPORT ***/ /*** ***/ /*** ***/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* */ /* <Struct> */ /* TT_Post_20Rec */ /* */ /* <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_20Rec_ { FT_UShort num_glyphs; FT_UShort num_names; FT_UShort* glyph_indices; FT_Char** glyph_names; } TT_Post_20Rec, *TT_Post_20; /*************************************************************************/ /* */ /* <Struct> */ /* TT_Post_25Rec */ /* */ /* <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_25Rec, *TT_Post_25; /*************************************************************************/ /* */ /* <Struct> */ /* TT_Post_NamesRec */ /* */ /* <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_NamesRec_ { FT_Bool loaded; union { TT_Post_20Rec format_20; TT_Post_25Rec format_25; } names; } TT_Post_NamesRec, *TT_Post_Names; /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /*** ***/ /*** ***/ /*** GX VARIATION TABLE SUPPORT ***/ /*** ***/ /*** ***/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT typedef struct GX_BlendRec_ *GX_Blend; #endif /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /*** ***/ /*** ***/ /*** EMBEDDED BDF PROPERTIES TABLE SUPPORT ***/ /*** ***/ /*** ***/ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /* * These types are used to support a `BDF ' table that isn't part of the * official TrueType specification. It is mainly used in SFNT-based * bitmap fonts that were generated from a set of BDF fonts. * * The format of the table is as follows. * * USHORT version `BDF ' table version number, should be 0x0001. * USHORT strikeCount Number of strikes (bitmap sizes) in this table. * ULONG stringTable Offset (from start of BDF table) to string * table. * * This is followed by an array of `strikeCount' descriptors, having the * following format. * * USHORT ppem Vertical pixels per EM for this strike. * USHORT numItems Number of items for this strike (properties and * atoms). Maximum is 255. * * This array in turn is followed by `strikeCount' value sets. Each * `value set' is an array of `numItems' items with the following format. * * ULONG item_name Offset in string table to item name. * USHORT item_type The item type. Possible values are * 0 => string (e.g., COMMENT) * 1 => atom (e.g., FONT or even SIZE) * 2 => int32 * 3 => uint32 * 0x10 => A flag to indicate a properties. This * is ORed with the above values. * ULONG item_value For strings => Offset into string table without * the corresponding double quotes. * For atoms => Offset into string table. * For integers => Direct value. * * All strings in the string table consist of bytes and are * zero-terminated. * */ #ifdef TT_CONFIG_OPTION_BDF typedef struct TT_BDFRec_ { FT_Byte* table; FT_Byte* table_end; FT_Byte* strings; FT_ULong strings_size; FT_UInt num_strikes; FT_Bool loaded; } TT_BDFRec, *TT_BDF; #endif /* TT_CONFIG_OPTION_BDF */ /*************************************************************************/ /*************************************************************************/ /*************************************************************************/ /*** ***/ /*** ***/ /*** 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 and TT_GlyphSlot are not */ /* shared between font drivers, and are thus defined 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; /* a function type used for the truetype bytecode interpreter hooks */ typedef FT_Error (*TT_Interpreter)( void* exec_context ); /* forward declaration */ typedef struct TT_LoaderRec_* TT_Loader; /*************************************************************************/ /* */ /* <FuncType> */ /* TT_Loader_GotoTableFunc */ /* */ /* <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_Loader_GotoTableFunc)( TT_Face face, FT_ULong tag, FT_Stream stream, FT_ULong* length ); /*************************************************************************/ /* */ /* <FuncType> */ /* TT_Loader_StartGlyphFunc */ /* */ /* <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 FT_STREAM_SEEK(offset) */ /* followed by FT_FRAME_ENTER(byte_count) with the loader's stream, */ /* but alternative formats (e.g. compressed ones) might use something */ /* different. */ /* */ typedef FT_Error (*TT_Loader_StartGlyphFunc)( TT_Loader loader, FT_UInt glyph_index, FT_ULong offset, FT_UInt byte_count ); /*************************************************************************/ /* */ /* <FuncType> */ /* TT_Loader_ReadGlyphFunc */ /* */ /* <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_Loader_ReadGlyphFunc)( TT_Loader loader ); /*************************************************************************/ /* */ /* <FuncType> */ /* TT_Loader_EndGlyphFunc */ /* */ /* <Description> */ /* Closes the current loader stream frame for the glyph. */ /* */ /* <Input> */ /* loader :: The current TrueType glyph loader object. */ /* */ typedef void (*TT_Loader_EndGlyphFunc)( TT_Loader loader ); typedef enum TT_SbitTableType_ { TT_SBIT_TABLE_TYPE_NONE = 0, TT_SBIT_TABLE_TYPE_EBLC, /* `EBLC' (Microsoft), */ /* `bloc' (Apple) */ TT_SBIT_TABLE_TYPE_CBLC, /* `CBLC' (Google) */ TT_SBIT_TABLE_TYPE_SBIX, /* `sbix' (Apple) */ /* do not remove */ TT_SBIT_TABLE_TYPE_MAX } TT_SbitTableType; /*************************************************************************/ /* */ /* 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. */ /* */ /* 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. */ /* */ /* cmap_table :: Address of the face's `cmap' SFNT table */ /* in memory (it's an extracted frame). */ /* */ /* cmap_size :: The size in bytes of the `cmap_table' */ /* described above. */ /* */ /* 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 :: A function used to access the frame of a */ /* given glyph within the face's font file. */ /* */ /* forget_glyph_frame :: A function used to forget the frame of a */ /* given glyph when all data has been loaded. */ /* */ /* read_glyph_header :: A function used to read a glyph header. */ /* It must be called between an `access' and */ /* `forget'. */ /* */ /* read_simple_glyph :: A function used to read a simple glyph. */ /* It must be called after the header was */ /* read, and before the `forget'. */ /* */ /* read_composite_glyph :: A function used to read a composite glyph. */ /* It must be called after the header was */ /* read, and before the `forget'. */ /* */ /* sfnt :: A pointer to the SFNT service. */ /* */ /* psnames :: A pointer to the PostScript names service. */ /* */ /* 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 :: The `pclt' SFNT table. */ /* */ /* 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. */ /* */ /* glyf_len :: The length of the `glyf' table. Needed */ /* for malformed `loca' tables. */ /* */ /* 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. Ignored for */ /* Type 2 fonts. */ /* */ /* kern_table_index :: The index of the kerning table in the font */ /* kerning directory. Ignored for Type 2 */ /* fonts. */ /* */ /* interpreter :: A pointer to the TrueType bytecode */ /* interpreters field is also used to hook */ /* the debugger in `ttdebug'. */ /* */ /* unpatented_hinting :: If true, use only unpatented methods in */ /* the bytecode interpreter. */ /* */ /* doblend :: A boolean which is set if the font should */ /* be blended (this is for GX var). */ /* */ /* blend :: Contains the data needed to control GX */ /* variation tables (rather like Multiple */ /* Master data). */ /* */ /* extra :: Reserved for third-party font drivers. */ /* */ /* postscript_name :: The PS name of the font. Used by the */ /* postscript name service. */ /* */ typedef struct TT_FaceRec_ { FT_FaceRec root; TTC_HeaderRec 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_Bool vertical_info; TT_VertHeader vertical; /* TT Vertical header, if present */ FT_UShort num_names; /* number of name records */ TT_NameTableRec name_table; /* name table */ TT_OS2 os2; /* TrueType OS/2 table */ TT_Postscript postscript; /* TrueType Postscript table */ FT_Byte* cmap_table; /* extracted `cmap' table */ FT_ULong cmap_size; TT_Loader_GotoTableFunc goto_table; TT_Loader_StartGlyphFunc access_glyph_frame; TT_Loader_EndGlyphFunc forget_glyph_frame; TT_Loader_ReadGlyphFunc read_glyph_header; TT_Loader_ReadGlyphFunc read_simple_glyph; TT_Loader_ReadGlyphFunc read_composite_glyph; /* 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 FT_Service_PsCMapsRec table used to */ /* handle glyph names <-> unicode & Mac values */ void* psnames; /***********************************************************************/ /* */ /* Optional TrueType/OpenType tables */ /* */ /***********************************************************************/ /* grid-fitting and scaling table */ TT_GaspRec gasp; /* the `gasp' table */ /* PCL 5 table */ TT_PCLT pclt; /* embedded bitmaps support */ FT_ULong num_sbit_scales; TT_SBit_Scale sbit_scales; /* postscript names table */ TT_Post_NamesRec postscript_names; /***********************************************************************/ /* */ /* TrueType-specific fields (ignored by the OTF-Type2 driver) */ /* */ /***********************************************************************/ /* 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; /* A pointer to the bytecode interpreter to use. This is also */ /* used to hook the debugger for the `ttdebug' utility. */ TT_Interpreter interpreter; #ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING /* Use unpatented hinting only. */ FT_Bool unpatented_hinting; #endif /***********************************************************************/ /* */ /* Other tables or fields. This is used by derivative formats like */ /* OpenType. */ /* */ /***********************************************************************/ FT_Generic extra; const char* postscript_name; FT_ULong glyf_len; #ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT FT_Bool doblend; GX_Blend blend; #endif /* since version 2.2 */ FT_Byte* horz_metrics; FT_ULong horz_metrics_size; FT_Byte* vert_metrics; FT_ULong vert_metrics_size; FT_ULong num_locations; /* in broken TTF, gid > 0xFFFF */ FT_Byte* glyph_locations; FT_Byte* hdmx_table; FT_ULong hdmx_table_size; FT_UInt hdmx_record_count; FT_ULong hdmx_record_size; FT_Byte* hdmx_record_sizes; FT_Byte* sbit_table; FT_ULong sbit_table_size; TT_SbitTableType sbit_table_type; FT_UInt sbit_num_strikes; FT_Byte* kern_table; FT_ULong kern_table_size; FT_UInt num_kern_tables; FT_UInt32 kern_avail_bits; FT_UInt32 kern_order_bits; #ifdef TT_CONFIG_OPTION_BDF TT_BDFRec bdf; #endif /* TT_CONFIG_OPTION_BDF */ /* since 2.3.0 */ FT_ULong horz_metrics_offset; FT_ULong vert_metrics_offset; #ifdef TT_CONFIG_OPTION_SUBPIXEL_HINTING /* since 2.4.12 */ FT_ULong sph_found_func_flags; /* special functions found */ /* for this face */ FT_Bool sph_compatibility_mode; #endif /* TT_CONFIG_OPTION_SUBPIXEL_HINTING */ } TT_FaceRec; /*************************************************************************/ /* */ /* <Struct> */ /* TT_GlyphZoneRec */ /* */ /* <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 maximum size in points of the zone. */ /* */ /* max_contours :: Max size in links contours of the zone. */ /* */ /* 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. */ /* */ /* first_point :: Offset of the current subglyph's first point. */ /* */ typedef struct TT_GlyphZoneRec_ { FT_Memory memory; FT_UShort max_points; FT_Short 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_Vector* orus; /* original (unscaled) point coordinates */ FT_Byte* tags; /* current touch flags */ FT_UShort* contours; /* contour end points */ FT_UShort first_point; /* offset of first (#0) point */ } TT_GlyphZoneRec, *TT_GlyphZone; /* handle to execution context */ typedef struct TT_ExecContextRec_* TT_ExecContext; /* glyph loader structure */ typedef struct TT_LoaderRec_ { 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_Vector pp1; FT_Vector pp2; FT_ULong glyf_offset; /* the zone where we load our glyphs */ TT_GlyphZoneRec base; TT_GlyphZoneRec zone; TT_ExecContext exec; FT_Byte* instructions; FT_ULong ins_pos; /* for possible extensibility in other formats */ void* other; /* since version 2.1.8 */ FT_Int top_bearing; FT_Int vadvance; FT_Vector pp3; FT_Vector pp4; /* since version 2.2.1 */ FT_Byte* cursor; FT_Byte* limit; } TT_LoaderRec; FT_END_HEADER #endif /* __TTTYPES_H__ */ /* END */