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@ -5,14 +5,11 @@ |
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/* Basic SFNT/TrueType type definitions and interface (specification */ |
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/* only). */ |
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/* */ |
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/* This code is shared by all TrueType and OpenType drivers. */ |
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/* */ |
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/* */ |
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/* Copyright 1996-2000 by */ |
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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/* */ |
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/* This file is part of the FreeType project, and may only be used */ |
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/* modified and distributed under the terms of the FreeType project */ |
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/* This file is part of the FreeType project, and may only be used, */ |
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/* modified, and distributed under the terms of the FreeType project */ |
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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/* this file you indicate that you have read the license and */ |
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/* understand and accept it fully. */ |
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@ -51,19 +48,22 @@ |
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/* */ |
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/* <Fields> */ |
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/* tag :: Must be `ttc ' to indicate a TrueType collection. */ |
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/* */ |
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/* version :: The version number. */ |
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/* */ |
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/* count :: The number of faces in the collection. The */ |
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/* specification says this should be an unsigned long, but */ |
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/* we use a signed long since we need the value -1 for */ |
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/* specific purposes. */ |
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/* */ |
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/* offsets :: The offsets of the font headers, one per face. */ |
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/* */ |
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typedef struct TTC_Header_ |
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{ |
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FT_ULong Tag; |
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FT_ULong tag; |
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FT_Fixed version; |
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FT_Long DirCount; |
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FT_ULong* TableDirectory; |
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FT_Long count; |
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FT_ULong* offsets; |
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} TTC_Header; |
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@ -77,11 +77,15 @@ |
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/* SFNT file format header. */ |
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/* */ |
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/* <Fields> */ |
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/* format_tag :: font format tag.. */ |
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/* num_tables :: number of tables in file */ |
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/* search_range :: must be 16*(max power of 2 <= num_tables) */ |
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/* entry_selector :: log2 of search_range/16 */ |
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/* range_shift :: must be num_tables*16 - search_range */ |
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/* format_tag :: The font format tag. */ |
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/* */ |
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/* num_tables :: The number of tables in file. */ |
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/* */ |
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/* search_range :: Must be 16*(max power of 2 <= num_tables). */ |
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/* */ |
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/* entry_selector :: Must be log2 of search_range/16. */ |
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/* */ |
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/* range_shift :: Must be num_tables*16 - search_range. */ |
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/* */ |
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typedef struct SFNT_Header_ |
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{ |
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@ -93,6 +97,7 @@ |
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} SFNT_Header; |
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/*************************************************************************/ |
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/* */ |
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/* <Struct> */ |
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@ -104,10 +109,13 @@ |
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/* */ |
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/* <Fields> */ |
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/* version :: The version number; starts with 0x00010000. */ |
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/* */ |
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/* numTables :: The number of tables. */ |
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/* */ |
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/* searchRange :: Unused. */ |
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/* */ |
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/* entrySelector :: Unused. */ |
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/* */ |
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/* rangeShift :: Unused. */ |
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/* */ |
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/* <Note> */ |
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@ -115,8 +123,8 @@ |
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/* */ |
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typedef struct TT_TableDir_ |
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{ |
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FT_Fixed version; /* should be 0x10000 */ |
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FT_UShort numTables; /* number of tables */ |
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FT_Fixed version; /* should be 0x10000 */ |
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FT_UShort numTables; /* number of tables */ |
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FT_UShort searchRange; /* These parameters are only used */ |
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FT_UShort entrySelector; /* for a dichotomy search in the */ |
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@ -135,9 +143,12 @@ |
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/* */ |
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/* <Fields> */ |
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/* Tag :: A four-bytes tag describing the table. */ |
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/* */ |
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/* CheckSum :: The table checksum. This value can be ignored. */ |
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/* */ |
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/* Offset :: The offset of the table from the start of the TrueType */ |
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/* font in its resource. */ |
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/* */ |
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/* Length :: The table length (in bytes). */ |
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/* */ |
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typedef struct TT_Table_ |
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@ -161,6 +172,7 @@ |
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/* */ |
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/* <Fields> */ |
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/* tableVersionNumber :: The version number. */ |
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/* */ |
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/* numCMaps :: The number of charmaps in the font. */ |
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/* */ |
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/* <Note> */ |
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@ -189,7 +201,7 @@ |
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/* encodingID :: A platform-specific ID used to indicate which source */ |
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/* encoding is used in this charmap. */ |
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/* */ |
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/* offset :: The offset of the charmap relative to the start of */ |
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/* offset :: The offset of the charmap relative to the start of */ |
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/* the `cmap' table. */ |
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/* */ |
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/* <Note> */ |
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@ -215,6 +227,7 @@ |
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/* */ |
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/* <Fields> */ |
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/* advance :: The advance width or height for the glyph. */ |
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/* */ |
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/* bearing :: The left-side or top-side bearing for the glyph. */ |
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/* */ |
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typedef struct TT_LongMetrics_ |
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@ -362,7 +375,9 @@ |
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/* */ |
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/* <Fields> */ |
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/* version :: The version number. */ |
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/* */ |
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/* numRanges :: The number of gasp ranges in table. */ |
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/* */ |
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/* gaspRanges :: An array of gasp ranges. */ |
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/* */ |
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typedef struct TT_Gasp_ |
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@ -381,7 +396,7 @@ |
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/* */ |
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/* <Description> */ |
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/* A small structure used to model the pre-computed widths of a given */ |
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/* size. They're found in the `hdmx' table. */ |
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/* size. They are found in the `hdmx' table. */ |
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/* */ |
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/* <Fields> */ |
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/* ppem :: The pixels per EM value at which these metrics apply. */ |
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@ -402,7 +417,7 @@ |
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/*************************************************************************/ |
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/* */ |
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/* <Struct> */ |
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/* TT_HdmxRec */ |
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/* TT_Hdmx */ |
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/* */ |
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/* <Description> */ |
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/* A structure used to model the `hdmx' table, which contains */ |
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@ -410,7 +425,9 @@ |
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/* */ |
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/* <Fields> */ |
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/* version :: The version number. */ |
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/* */ |
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/* num_records :: The number of hdmx records. */ |
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/* */ |
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/* records :: An array of hdmx records. */ |
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/* */ |
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typedef struct TT_Hdmx_ |
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@ -434,7 +451,9 @@ |
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/* */ |
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/* <Fields> */ |
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/* left :: The index of the left glyph in pair. */ |
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/* */ |
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/* right :: The index of the right glyph in pair. */ |
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/* */ |
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/* value :: The kerning distance. A positive value spaces the */ |
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/* glyphs, a negative one makes them closer. */ |
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/* */ |
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@ -446,18 +465,20 @@ |
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} TT_Kern_0_Pair; |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/*** ***/ |
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/*** ***/ |
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/*** EMBEDDED BITMAPS SUPPORT ***/ |
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/*** EMBEDDED BITMAPS SUPPORT ***/ |
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/*** ***/ |
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/*** ***/ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/* */ |
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/* <Struct> */ |
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@ -512,15 +533,15 @@ |
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/* `EBDT' (Microsoft) or the `bdat' (Apple) table. */ |
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/* */ |
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/* <Fields> */ |
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/* height :: The glyph height in pixels. */ |
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/* height :: The glyph height in pixels. */ |
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/* */ |
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/* width :: The glyph width in pixels. */ |
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/* width :: The glyph width in pixels. */ |
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/* */ |
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/* bearingX :: The left-side bearing. */ |
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/* bearingX :: The left-side bearing. */ |
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/* */ |
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/* bearingY :: The top-side bearing. */ |
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/* bearingY :: The top-side bearing. */ |
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/* */ |
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/* advance :: The advance width or height. */ |
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/* advance :: The advance width or height. */ |
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/* */ |
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typedef struct TT_SBit_Small_Metrics_ |
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{ |
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@ -582,6 +603,9 @@ |
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/* */ |
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/* vertBearingX - width */ |
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/* */ |
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/* pads :: Unused (to make the size of the record */ |
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/* a multiple of 32 bits. */ |
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/* */ |
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typedef struct TT_SBit_Line_Metrics_ |
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{ |
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FT_Char ascender; |
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@ -692,23 +716,23 @@ |
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/* */ |
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typedef struct TT_SBit_Strike_ |
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{ |
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FT_Int num_ranges; |
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TT_SBit_Range* sbit_ranges; |
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FT_ULong ranges_offset; |
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FT_Int num_ranges; |
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TT_SBit_Range* sbit_ranges; |
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FT_ULong ranges_offset; |
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FT_ULong color_ref; |
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FT_ULong color_ref; |
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TT_SBit_Line_Metrics hori; |
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TT_SBit_Line_Metrics vert; |
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TT_SBit_Line_Metrics hori; |
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TT_SBit_Line_Metrics vert; |
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FT_UShort start_glyph; |
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FT_UShort end_glyph; |
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FT_UShort start_glyph; |
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FT_UShort end_glyph; |
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FT_Byte x_ppem; |
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FT_Byte y_ppem; |
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FT_Byte x_ppem; |
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FT_Byte y_ppem; |
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FT_Byte bit_depth; |
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FT_Char flags; |
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FT_Byte bit_depth; |
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FT_Char flags; |
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} TT_SBit_Strike; |
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@ -723,7 +747,9 @@ |
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/* */ |
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/* <Fields> */ |
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/* glyph_code :: The element's glyph index. */ |
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/* */ |
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/* x_offset :: The element's left bearing. */ |
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/* */ |
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/* y_offset :: The element's top bearing. */ |
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/* */ |
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typedef struct TT_SBit_Component_ |
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@ -771,6 +797,7 @@ |
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} TT_SBit_Scale; |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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@ -783,6 +810,7 @@ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/* */ |
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/* <Struct> */ |
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@ -862,6 +890,7 @@ |
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} TT_Post_Names; |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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@ -874,7 +903,9 @@ |
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/*************************************************************************/ |
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/*************************************************************************/ |
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/* format 0 */ |
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typedef struct TT_CMap0_ |
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{ |
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FT_Byte* glyphIdArray; |
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@ -883,6 +914,7 @@ |
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/* format 2 */ |
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typedef struct TT_CMap2SubHeader_ |
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{ |
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FT_UShort firstCode; /* first valid low byte */ |
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@ -895,7 +927,7 @@ |
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typedef struct TT_CMap2_ |
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{ |
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FT_UShort* subHeaderKeys; |
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FT_UShort* subHeaderKeys; |
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/* high byte mapping table */ |
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/* value = subHeader index * 8 */ |
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@ -907,6 +939,7 @@ |
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/* format 4 */ |
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typedef struct TT_CMap4Segment_ |
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{ |
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FT_UShort endCount; |
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@ -919,21 +952,22 @@ |
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typedef struct TT_CMap4_ |
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{ |
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FT_UShort segCountX2; /* number of segments * 2 */ |
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FT_UShort searchRange; /* these parameters can be used */ |
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FT_UShort entrySelector; /* for a binary search */ |
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FT_UShort rangeShift; |
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FT_UShort segCountX2; /* number of segments * 2 */ |
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FT_UShort searchRange; /* these parameters can be used */ |
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FT_UShort entrySelector; /* for a binary search */ |
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FT_UShort rangeShift; |
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TT_CMap4Segment* segments; |
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FT_UShort* glyphIdArray; |
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FT_UShort numGlyphId; /* control value */ |
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TT_CMap4Segment* last_segment; /* last used segment, this is a small */ |
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TT_CMap4Segment* last_segment; /* last used segment; this is a small */ |
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/* cache to potentially increase speed */ |
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} TT_CMap4; |
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/* format 6 */ |
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typedef struct TT_CMap6_ |
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{ |
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FT_UShort firstCode; /* first character code of subrange */ |
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@ -943,12 +977,15 @@ |
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} TT_CMap6; |
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typedef struct TT_CMapTable_ TT_CMapTable; |
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typedef |
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|
|
FT_UInt (*TT_CharMap_Func)( TT_CMapTable* charmap, |
|
|
|
|
FT_ULong char_code ); |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* charmap table */ |
|
|
|
|
struct TT_CMapTable_ |
|
|
|
|
{ |
|
|
|
|
@ -979,16 +1016,17 @@ |
|
|
|
|
/* TT_CharMapRec */ |
|
|
|
|
/* */ |
|
|
|
|
/* <Description> */ |
|
|
|
|
/* The TrueType character map object type. */ |
|
|
|
|
/* 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; |
|
|
|
|
FT_CharMapRec root; |
|
|
|
|
TT_CMapTable cmap; |
|
|
|
|
|
|
|
|
|
} TT_CharMapRec; |
|
|
|
|
|
|
|
|
|
@ -1011,12 +1049,13 @@ |
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|
|
/* 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 */ |
|
|
|
|
/* Note, however, that the classes TT_Size, TT_GlyphSlot, and TT_CharMap */ |
|
|
|
|
/* are not shared between font drivers, and are thus defined normally in */ |
|
|
|
|
/* `drivers/truetype/ttobjs.h'. */ |
|
|
|
|
/* `ttobjs.h'. */ |
|
|
|
|
/* */ |
|
|
|
|
/*************************************************************************/ |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/ |
|
|
|
|
/* */ |
|
|
|
|
/* <Type> */ |
|
|
|
|
@ -1031,7 +1070,7 @@ |
|
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|
|
/* The TT_Face structure is also used as a `parent class' for the */ |
|
|
|
|
/* OpenType-CFF class (T2_Face). */ |
|
|
|
|
/* */ |
|
|
|
|
typedef struct TT_FaceRec_* TT_Face; |
|
|
|
|
typedef struct TT_FaceRec_* TT_Face; |
|
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|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/ |
|
|
|
|
@ -1051,6 +1090,7 @@ |
|
|
|
|
/* forward declaration */ |
|
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|
|
typedef struct TT_Loader_ TT_Loader; |
|
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|
|
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|
|
|
|
|
|
|
/*************************************************************************/ |
|
|
|
|
/* */ |
|
|
|
|
/* <FuncType> */ |
|
|
|
|
@ -1060,86 +1100,96 @@ |
|
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|
|
/* 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. */ |
|
|
|
|
/* face :: A handle to the target face object. */ |
|
|
|
|
/* */ |
|
|
|
|
/* tag :: A 4-byte tag used to name the table. */ |
|
|
|
|
/* */ |
|
|
|
|
/* stream :: The input stream. */ |
|
|
|
|
/* */ |
|
|
|
|
/* <Output> */ |
|
|
|
|
/* length :: length of table in bytes. Set to 0 when not needed */ |
|
|
|
|
/* length :: The length of the table in bytes. Set to 0 if not */ |
|
|
|
|
/* needed. */ |
|
|
|
|
/* */ |
|
|
|
|
/* <Return> */ |
|
|
|
|
/* TrueType error code. 0 means success. */ |
|
|
|
|
/* FreeType error code. 0 means success. */ |
|
|
|
|
/* */ |
|
|
|
|
/* <Note> */ |
|
|
|
|
/* The stream cursor must be at the font file's origin */ |
|
|
|
|
/* 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 ); |
|
|
|
|
FT_ULong* length ); |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/ |
|
|
|
|
/* */ |
|
|
|
|
/* <FuncType> */ |
|
|
|
|
/* TT_Access_Glyph_Frame */ |
|
|
|
|
/* TT_Access_Glyph_Frame_Func */ |
|
|
|
|
/* */ |
|
|
|
|
/* <Description> */ |
|
|
|
|
/* Seeks a stream to the start of a given glyph element, and */ |
|
|
|
|
/* opens a frame for it.. */ |
|
|
|
|
/* 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 :: index of glyph to access */ |
|
|
|
|
/* offset :: offset of glyph according to locations table */ |
|
|
|
|
/* byte_count :: size of frame in bytes */ |
|
|
|
|
/* 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> */ |
|
|
|
|
/* TrueType error code. 0 means success. */ |
|
|
|
|
/* 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 (compressed ones) might use something */ |
|
|
|
|
/* different.. */ |
|
|
|
|
/* 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 */ |
|
|
|
|
/* 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.. */ |
|
|
|
|
/* composite) from the loader's current stream frame. */ |
|
|
|
|
/* */ |
|
|
|
|
/* <Input> */ |
|
|
|
|
/* loader :: the current TrueType glyph loader object */ |
|
|
|
|
/* loader :: The current TrueType glyph loader object. */ |
|
|
|
|
/* */ |
|
|
|
|
/* <Return> */ |
|
|
|
|
/* TrueType error code. 0 means success. */ |
|
|
|
|
/* FreeType error code. 0 means success. */ |
|
|
|
|
/* */ |
|
|
|
|
typedef |
|
|
|
|
FT_Error (*TT_Load_Glyph_Element_Func)( TT_Loader* loader ); |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*************************************************************************/ |
|
|
|
|
/* */ |
|
|
|
|
/* <FuncType> */ |
|
|
|
|
/* TT_Forget_Frame_Element */ |
|
|
|
|
/* TT_Forget_Glyph_Frame_Func */ |
|
|
|
|
/* */ |
|
|
|
|
/* <Description> */ |
|
|
|
|
/* Closes the current loader stream frame for the glyph.. */ |
|
|
|
|
/* Closes the current loader stream frame for the glyph. */ |
|
|
|
|
/* */ |
|
|
|
|
/* <Input> */ |
|
|
|
|
/* loader :: the current TrueType glyph loader object */ |
|
|
|
|
/* loader :: The current TrueType glyph loader object. */ |
|
|
|
|
/* */ |
|
|
|
|
typedef |
|
|
|
|
void (*TT_Forget_Glyph_Frame_Func)( TT_Loader* loader ); |
|
|
|
|
void (*TT_Forget_Glyph_Frame_Func)( TT_Loader* loader ); |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
@ -1155,153 +1205,175 @@ |
|
|
|
|
/* point-size independent data found in a TrueType font file. */ |
|
|
|
|
/* */ |
|
|
|
|
/* <Fields> */ |
|
|
|
|
/* root :: The base FT_Face structure, managed by the */ |
|
|
|
|
/* base layer. */ |
|
|
|
|
/* 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'). */ |
|
|
|
|
/* */ |
|
|
|
|
/* ttcHeader :: The TrueType collection header, used when the */ |
|
|
|
|
/* file is a `ttc' rather than a `ttf'. For */ |
|
|
|
|
/* ordinary font files, the field */ |
|
|
|
|
/* `ttcHeader.DirCount' is set to 0. */ |
|
|
|
|
/* 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. */ |
|
|
|
|
/* */ |
|
|
|
|
/* num_tables :: The number of TrueType tables in this font */ |
|
|
|
|
/* file. */ |
|
|
|
|
/* max_components :: The maximum number of glyph components */ |
|
|
|
|
/* required to load any composite glyph from */ |
|
|
|
|
/* this font. Used to size the load stack. */ |
|
|
|
|
/* */ |
|
|
|
|
/* dir_tables :: The directory of TrueType tables for this */ |
|
|
|
|
/* font file. */ |
|
|
|
|
/* vertical_info :: A boolean which is set when the font file */ |
|
|
|
|
/* contains vertical metrics. If not, the */ |
|
|
|
|
/* value of the `vertical' field is */ |
|
|
|
|
/* undefined. */ |
|
|
|
|
/* */ |
|
|
|
|
/* header :: The font's font header (`head' table). Read */ |
|
|
|
|
/* on font opening. */ |
|
|
|
|
/* 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. */ |
|
|
|
|
/* */ |
|
|
|
|
/* horizontal :: The font's horizontal header (`hhea' table). */ |
|
|
|
|
/* This field also contains the associated */ |
|
|
|
|
/* horizontal metrics table (`hmtx'). */ |
|
|
|
|
/* num_names :: The number of name records within this */ |
|
|
|
|
/* TrueType font. */ |
|
|
|
|
/* */ |
|
|
|
|
/* 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. */ |
|
|
|
|
/* name_table :: The table of name records (`name'). */ |
|
|
|
|
/* */ |
|
|
|
|
/* max_components :: The maximum number of glyph components */ |
|
|
|
|
/* required to load any composite glyph from */ |
|
|
|
|
/* this font. Used to size the load stack. */ |
|
|
|
|
/* os2 :: The font's OS/2 table (`OS/2'). */ |
|
|
|
|
/* */ |
|
|
|
|
/* vertical_info :: A boolean which is set when the font file */ |
|
|
|
|
/* contains vertical metrics. If not, the value */ |
|
|
|
|
/* of the `vertical' field is undefined. */ |
|
|
|
|
/* 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. */ |
|
|
|
|
/* */ |
|
|
|
|
/* 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_charmaps :: The number of character mappings in the */ |
|
|
|
|
/* font. */ |
|
|
|
|
/* */ |
|
|
|
|
/* num_names :: The number of name records within this */ |
|
|
|
|
/* TrueType 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. */ |
|
|
|
|
/* */ |
|
|
|
|
/* name_table :: The table of name records (`name'). */ |
|
|
|
|
/* 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). */ |
|
|
|
|
/* */ |
|
|
|
|
/* os2 :: The font's OS/2 table (`OS/2'). */ |
|
|
|
|
/* access_glyph_frame :: XXX */ |
|
|
|
|
/* */ |
|
|
|
|
/* 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. */ |
|
|
|
|
/* read_glyph_header :: XXX */ |
|
|
|
|
/* */ |
|
|
|
|
/* num_charmaps :: The number of character mappings in the font. */ |
|
|
|
|
/* read_simple_glyph :: XXX */ |
|
|
|
|
/* */ |
|
|
|
|
/* 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. */ |
|
|
|
|
/* read_composite_glyph :: XXX */ |
|
|
|
|
/* */ |
|
|
|
|
/* goto_face :: 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) */ |
|
|
|
|
/* forget_glyph_frame :: XXX */ |
|
|
|
|
/* */ |
|
|
|
|
/* sfnt :: a pointer to the SFNT `driver' interface. */ |
|
|
|
|
/* sfnt :: A pointer to the SFNT `driver' interface. */ |
|
|
|
|
/* */ |
|
|
|
|
/* hdmx :: The face's horizontal device metrics (`hdmx' */ |
|
|
|
|
/* table). This table is optional in */ |
|
|
|
|
/* TrueType/OpenType fonts. */ |
|
|
|
|
/* psnames :: A pointer to the `PSNames' module */ |
|
|
|
|
/* interface. */ |
|
|
|
|
/* */ |
|
|
|
|
/* gasp :: The grid-fitting and scaling properties table */ |
|
|
|
|
/* (`gasp'). This table is optional in */ |
|
|
|
|
/* TrueType/OpenType fonts. */ |
|
|
|
|
/* hdmx :: The face's horizontal device metrics */ |
|
|
|
|
/* (`hdmx' table). This table is optional in */ |
|
|
|
|
/* TrueType/OpenType fonts. */ |
|
|
|
|
/* */ |
|
|
|
|
/* num_sbit_strikes :: The number of sbit strikes, i.e., bitmap */ |
|
|
|
|
/* sizes, embedded in this font. */ |
|
|
|
|
/* gasp :: The grid-fitting and scaling properties */ |
|
|
|
|
/* table (`gasp'). This table is optional in */ |
|
|
|
|
/* TrueType/OpenType fonts. */ |
|
|
|
|
/* */ |
|
|
|
|
/* sbit_strikes :: An array of sbit strikes embedded in this */ |
|
|
|
|
/* font. This table is optional in a */ |
|
|
|
|
/* TrueType/OpenType font. */ |
|
|
|
|
/* pclt :: XXX */ |
|
|
|
|
/* */ |
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|
|
/* num_sbit_scales :: The number of sbit scales for this font. */ |
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|
/* num_sbit_strikes :: The number of sbit strikes, i.e., bitmap */ |
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/* sizes, embedded in this font. */ |
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/* */ |
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|
/* sbit_scales :: Array of sbit scales embedded in this font. */ |
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/* This table is optional in a TrueType/OpenType */ |
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/* font. */ |
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/* sbit_strikes :: An array of sbit strikes embedded in this */ |
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/* font. This table is optional in a */ |
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/* TrueType/OpenType font. */ |
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/* */ |
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/* postscript_names :: A table used to store the Postscript names of */ |
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/* the glyphs for this font. See the file */ |
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/* `ttconfig.h' for comments on the */ |
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/* TT_CONFIG_OPTION_POSTSCRIPT_NAMES option. */ |
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/* num_sbit_scales :: The number of sbit scales for this font. */ |
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/* */ |
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/* num_locations :: The number of glyph locations in this */ |
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/* TrueType file. This should be identical to */ |
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/* the number of glyphs. Ignored for Type 2 */ |
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/* fonts. */ |
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|
/* sbit_scales :: Array of sbit scales embedded in this */ |
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|
/* font. This table is optional in a */ |
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/* TrueType/OpenType font. */ |
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/* */ |
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/* glyph_locations :: An array of longs. These are offsets to */ |
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/* glyph data within the `glyf' table. Ignored */ |
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/* for Type 2 font faces. */ |
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/* postscript_names :: A table used to store the Postscript names */ |
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|
/* of the glyphs for this font. See the */ |
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/* file `ttconfig.h' for comments on the */ |
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/* TT_CONFIG_OPTION_POSTSCRIPT_NAMES option. */ |
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/* */ |
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|
/* font_program_size :: Size in bytecodes of the face's font program. */ |
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|
/* 0 if none defined. Ignored for Type 2 fonts. */ |
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/* num_locations :: The number of glyph locations in this */ |
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/* TrueType file. This should be */ |
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/* identical to the number of glyphs. */ |
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/* Ignored for Type 2 fonts. */ |
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/* */ |
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/* font_program :: The face's font program (bytecode stream) */ |
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/* executed at load time, also used during glyph */ |
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/* rendering. Comes from the `fpgm' table. */ |
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|
/* Ignored for Type 2 font fonts. */ |
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/* glyph_locations :: An array of longs. These are offsets to */ |
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/* glyph data within the `glyf' table. */ |
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/* Ignored for Type 2 font faces. */ |
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/* */ |
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/* cvt_program_size :: Size in bytecodes of the face's cvt program. */ |
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|
/* Ignored for Type 2 fonts. */ |
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|
/* font_program_size :: Size in bytecodes of the face's font */ |
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/* program. 0 if none defined. Ignored for */ |
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|
/* Type 2 fonts. */ |
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/* */ |
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/* cvt_program :: The face's cvt program (bytecode stream) */ |
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/* executed each time an instance/size is */ |
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/* changed/reset. Comes from the `prep' table. */ |
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|
/* Ignored for Type 2 fonts. */ |
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/* font_program :: The face's font program (bytecode stream) */ |
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|
/* executed at load time, also used during */ |
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|
/* glyph rendering. Comes from the `fpgm' */ |
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|
/* table. Ignored for Type 2 font fonts. */ |
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|
/* */ |
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/* cvt_size :: Size of the control value table (in entries). */ |
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|
/* Ignored for Type 2 fonts. */ |
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|
/* cvt_program_size :: The size in bytecodes of the face's cvt */ |
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|
/* program. Ignored for Type 2 fonts. */ |
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/* */ |
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|
|
/* cvt :: The face's original control value table. */ |
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|
/* Coordinates are expressed in unscaled font */ |
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/* units. Comes from the `cvt ` table. Ignored */ |
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|
/* for Type 2 fonts. */ |
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|
|
/* cvt_program :: The face's cvt program (bytecode stream) */ |
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|
/* executed each time an instance/size is */ |
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|
/* changed/reset. Comes from the `prep' */ |
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|
/* table. Ignored for Type 2 fonts. */ |
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/* */ |
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/* num_kern_pairs :: The number of kerning pairs present in the */ |
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/* font file. The engine only loads the first */ |
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/* horizontal format 0 kern table it finds in */ |
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/* the font file. You should use the `ttxkern' */ |
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|
/* structures if you want to access other */ |
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|
/* kerning tables. Ignored for Type 2 fonts. */ |
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/* cvt_size :: Size of the control value table (in */ |
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|
/* entries). Ignored for Type 2 fonts. */ |
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/* */ |
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|
/* kern_table_index :: The index of the kerning table in the font */ |
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|
/* kerning directory. Only used by the ttxkern */ |
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|
/* extension to avoid data duplication. Ignored */ |
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|
/* for Type 2 fonts. */ |
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|
/* cvt :: The face's original control value table. */ |
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|
/* Coordinates are expressed in unscaled font */ |
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|
/* units. Comes from the `cvt ' table. */ |
|
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|
|
/* Ignored for Type 2 fonts. */ |
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|
/* */ |
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|
/* kern_pairs :: Array of kerning pairs, if any. Ignored for */ |
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|
/* Type 2 fonts. */ |
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|
|
/* num_kern_pairs :: The number of kerning pairs present in the */ |
|
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|
|
/* font file. The engine only loads the */ |
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|
|
/* first horizontal format 0 kern table it */ |
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|
/* finds in the font file. You should use */ |
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|
/* the `ttxkern' structures if you want to */ |
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|
/* access other kerning tables. Ignored */ |
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|
/* for Type 2 fonts. */ |
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/* */ |
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|
/* interpreter :: Pointer to the TrueType bytecode interpreter */ |
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|
/* this field is also used to hook the debugger */ |
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/* in `ttdebug' */ |
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/* kern_table_index :: The index of the kerning table in the font */ |
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|
|
/* kerning directory. Only used by the */ |
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|
|
/* ttxkern extension to avoid data */ |
|
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|
/* duplication. Ignored for Type 2 fonts. */ |
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|
|
/* */ |
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|
|
/* interpreter :: A pointer to the TrueType bytecode */ |
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|
/* interpreters field is also used to hook */ |
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|
/* the debugger in `ttdebug'. */ |
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/* */ |
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/* extra :: XXX */ |
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|
|
/* */ |
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|
|
typedef struct TT_FaceRec_ |
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{ |
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|
@ -1331,11 +1403,7 @@ |
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FT_Int num_charmaps; |
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TT_CharMap charmaps; /* array of TT_CharMapRec */ |
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|
/* a pointer to the function used to seek a stream to the start of */ |
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|
|
/* a given TrueType table. This should default to the function */ |
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|
/* TT_Goto_Table defined in `ttload.h', but some font drivers */ |
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|
|
/* might need something different, e.g. Type 42 fonts */ |
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|
|
TT_Goto_Table_Func goto_table; |
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|
TT_Goto_Table_Func goto_table; |
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TT_Access_Glyph_Frame_Func access_glyph_frame; |
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|
TT_Load_Glyph_Element_Func read_glyph_header; |
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|
@ -1376,6 +1444,7 @@ |
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|
/* postscript names table */ |
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|
|
TT_Post_Names postscript_names; |
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|
|
/***********************************************************************/ |
|
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|
|
/* */ |
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|
|
/* TrueType-specific fields (ignored by the OTF-Type2 driver) */ |
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|
@ -1403,10 +1472,11 @@ |
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|
|
FT_Int kern_table_index; |
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|
|
TT_Kern_0_Pair* kern_pairs; |
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|
|
/* a pointer to the bytecode interpreter to use. This is also */ |
|
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|
|
/* used to hook the debugger for the `ttdebug' utility.. */ |
|
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|
/* A pointer to the bytecode interpreter to use. This is also */ |
|
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|
|
/* used to hook the debugger for the `ttdebug' utility. */ |
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|
TT_Interpreter interpreter; |
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|
/***********************************************************************/ |
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|
|
/* */ |
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|
|
/* Other tables or fields. This is used by derivative formats like */ |
|
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|
|
@ -1419,30 +1489,35 @@ |
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|
|
} TT_FaceRec; |
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|
/************************************************************************
|
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|
|
* |
|
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|
|
* <Struct> |
|
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|
|
* TT_GlyphZone |
|
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|
|
* |
|
|
|
|
* <Description> |
|
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|
|
* A glyph zone is used to load, scale and hint glyph outline |
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|
* coordinates. |
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|
* |
|
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|
|
* <Fields> |
|
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|
|
* memory :: handle to memory manager |
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|
* max_points :: max size in points of zone |
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|
* max_contours :: max size in contours of zone |
|
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|
|
* n_points :: current number of points in zone |
|
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|
|
* n_contours :: current number of contours in zone |
|
|
|
|
* org :: original glyph coordinates (font units/scaled) |
|
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|
|
* cur :: current glyph coordinates (scaled/hinted) |
|
|
|
|
* tags :: point control tags |
|
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|
|
* contours :: contour end points |
|
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|
* |
|
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|
|
***********************************************************************/ |
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|
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|
|
/*************************************************************************/ |
|
|
|
|
/* */ |
|
|
|
|
/* <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; |
|
|
|
|
@ -1460,43 +1535,43 @@ |
|
|
|
|
} TT_GlyphZone; |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* handle to execution context */ |
|
|
|
|
/* handle to execution context */ |
|
|
|
|
typedef struct TT_ExecContextRec_* TT_ExecContext; |
|
|
|
|
|
|
|
|
|
/* glyph loader structure */ |
|
|
|
|
/* glyph loader structure */ |
|
|
|
|
struct TT_Loader_ |
|
|
|
|
{ |
|
|
|
|
FT_Face face; |
|
|
|
|
FT_Size size; |
|
|
|
|
FT_GlyphSlot glyph; |
|
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|
|
FT_GlyphLoader* gloader; |
|
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|
|
FT_Face face; |
|
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|
|
FT_Size size; |
|
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|
|
FT_GlyphSlot glyph; |
|
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|
|
FT_GlyphLoader* gloader; |
|
|
|
|
|
|
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|
|
FT_ULong load_flags; |
|
|
|
|
FT_UInt glyph_index; |
|
|
|
|
FT_ULong load_flags; |
|
|
|
|
FT_UInt glyph_index; |
|
|
|
|
|
|
|
|
|
FT_Stream stream; |
|
|
|
|
FT_Int byte_len; |
|
|
|
|
FT_Stream stream; |
|
|
|
|
FT_Int byte_len; |
|
|
|
|
|
|
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|
|
FT_Short n_contours; |
|
|
|
|
FT_BBox bbox; |
|
|
|
|
FT_Int left_bearing; |
|
|
|
|
FT_Int advance; |
|
|
|
|
FT_Bool preserve_pps; |
|
|
|
|
FT_Vector pp1; |
|
|
|
|
FT_Vector pp2; |
|
|
|
|
FT_Short n_contours; |
|
|
|
|
FT_BBox bbox; |
|
|
|
|
FT_Int left_bearing; |
|
|
|
|
FT_Int advance; |
|
|
|
|
FT_Bool preserve_pps; |
|
|
|
|
FT_Vector pp1; |
|
|
|
|
FT_Vector pp2; |
|
|
|
|
|
|
|
|
|
FT_ULong glyf_offset; |
|
|
|
|
FT_ULong glyf_offset; |
|
|
|
|
|
|
|
|
|
/* the zone where we load our glyphs */ |
|
|
|
|
TT_GlyphZone base; |
|
|
|
|
TT_GlyphZone zone; |
|
|
|
|
TT_GlyphZone base; |
|
|
|
|
TT_GlyphZone zone; |
|
|
|
|
|
|
|
|
|
TT_ExecContext exec; |
|
|
|
|
FT_Byte* instructions; |
|
|
|
|
FT_ULong ins_pos; |
|
|
|
|
TT_ExecContext exec; |
|
|
|
|
FT_Byte* instructions; |
|
|
|
|
FT_ULong ins_pos; |
|
|
|
|
|
|
|
|
|
/* for possible extensibility in other formats */ |
|
|
|
|
void* other; |
|
|
|
|
void* other; |
|
|
|
|
|
|
|
|
|
}; |
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|
|
Werner Lemberg
25 years ago