| /******************************************************************* |
| * |
| * Copyright 1996-2000 by |
| * David Turner, Robert Wilhelm, and Werner Lemberg. |
| * |
| * Copyright 2006 Behdad Esfahbod |
| * |
| * This is part of HarfBuzz, an OpenType Layout engine library. |
| * |
| * See the file name COPYING for licensing information. |
| * |
| ******************************************************************/ |
| #ifndef HARFBUZZ_OPEN_H |
| #define HARFBUZZ_OPEN_H |
| |
| #include <ft2build.h> |
| #include FT_FREETYPE_H |
| |
| FT_BEGIN_HEADER |
| |
| /* Use this if a feature applies to all glyphs */ |
| #define HB_ALL_GLYPHS 0xFFFF |
| |
| #define HB_DEFAULT_LANGUAGE 0xFFFF |
| |
| #define HB_MAX_NESTING_LEVEL 100 |
| |
| #define HB_Err_Invalid_SubTable_Format 0x1000 |
| #define HB_Err_Invalid_SubTable 0x1001 |
| #define HB_Err_Not_Covered 0x1002 |
| #define HB_Err_Too_Many_Nested_Contexts 0x1003 |
| #define HB_Err_No_MM_Interpreter 0x1004 |
| #define HB_Err_Empty_Script 0x1005 |
| |
| |
| /* Script list related structures */ |
| |
| struct HB_LangSys_ |
| { |
| FT_UShort LookupOrderOffset; /* always 0 for TT Open 1.0 */ |
| FT_UShort ReqFeatureIndex; /* required FeatureIndex */ |
| FT_UShort FeatureCount; /* number of Feature indices */ |
| FT_UShort* FeatureIndex; /* array of Feature indices */ |
| }; |
| |
| typedef struct HB_LangSys_ HB_LangSys; |
| |
| |
| struct HB_LangSysRecord_ |
| { |
| FT_ULong LangSysTag; /* LangSysTag identifier */ |
| HB_LangSys LangSys; /* LangSys table */ |
| }; |
| |
| typedef struct HB_LangSysRecord_ HB_LangSysRecord; |
| |
| |
| struct HB_Script_ |
| { |
| HB_LangSys DefaultLangSys; /* DefaultLangSys table */ |
| FT_UShort LangSysCount; /* number of LangSysRecords */ |
| HB_LangSysRecord* LangSysRecord; /* array of LangSysRecords */ |
| }; |
| |
| typedef struct HB_Script_ HB_Script; |
| |
| |
| struct HB_ScriptRecord_ |
| { |
| FT_ULong ScriptTag; /* ScriptTag identifier */ |
| HB_Script Script; /* Script table */ |
| }; |
| |
| typedef struct HB_ScriptRecord_ HB_ScriptRecord; |
| |
| |
| struct HB_ScriptList_ |
| { |
| FT_UShort ScriptCount; /* number of ScriptRecords */ |
| HB_ScriptRecord* ScriptRecord; /* array of ScriptRecords */ |
| }; |
| |
| typedef struct HB_ScriptList_ HB_ScriptList; |
| |
| |
| /* Feature list related structures */ |
| |
| struct HB_Feature_ |
| { |
| FT_UShort FeatureParams; /* always 0 for TT Open 1.0 */ |
| FT_UShort LookupListCount; /* number of LookupList indices */ |
| FT_UShort* LookupListIndex; /* array of LookupList indices */ |
| }; |
| |
| typedef struct HB_Feature_ HB_Feature; |
| |
| |
| struct HB_FeatureRecord_ |
| { |
| FT_ULong FeatureTag; /* FeatureTag identifier */ |
| HB_Feature Feature; /* Feature table */ |
| }; |
| |
| typedef struct HB_FeatureRecord_ HB_FeatureRecord; |
| |
| |
| struct HB_FeatureList_ |
| { |
| FT_UShort FeatureCount; /* number of FeatureRecords */ |
| HB_FeatureRecord* FeatureRecord; /* array of FeatureRecords */ |
| FT_UShort* ApplyOrder; /* order to apply features */ |
| FT_UShort ApplyCount; /* number of elements in ApplyOrder */ |
| }; |
| |
| typedef struct HB_FeatureList_ HB_FeatureList; |
| |
| |
| /* Lookup list related structures */ |
| |
| typedef struct HB_SubTable_ HB_SubTable; |
| |
| |
| struct HB_Lookup_ |
| { |
| FT_UShort LookupType; /* Lookup type */ |
| FT_UShort LookupFlag; /* Lookup qualifiers */ |
| FT_UShort SubTableCount; /* number of SubTables */ |
| HB_SubTable* SubTable; /* array of SubTables */ |
| }; |
| |
| typedef struct HB_Lookup_ HB_Lookup; |
| |
| |
| /* The `Properties' field is not defined in the OpenType specification but |
| is needed for processing lookups. If properties[n] is > 0, the |
| functions HB_GSUB_Apply_String() resp. HB_GPOS_Apply_String() will |
| process Lookup[n] for glyphs which have the specific bit not set in |
| the `properties' field of the input string object. */ |
| |
| struct HB_LookupList_ |
| { |
| FT_UShort LookupCount; /* number of Lookups */ |
| HB_Lookup* Lookup; /* array of Lookup records */ |
| FT_UInt* Properties; /* array of flags */ |
| }; |
| |
| typedef struct HB_LookupList_ HB_LookupList; |
| |
| |
| /* Possible LookupFlag bit masks. `HB_LOOKUP_FLAG_IGNORE_SPECIAL_MARKS' comes from the |
| OpenType 1.2 specification; HB_LOOKUP_FLAG_RIGHT_TO_LEFT has been (re)introduced in |
| OpenType 1.3 -- if set, the last glyph in a cursive attachment |
| sequence has to be positioned on the baseline -- regardless of the |
| writing direction. */ |
| |
| #define HB_LOOKUP_FLAG_RIGHT_TO_LEFT 0x0001 |
| #define HB_LOOKUP_FLAG_IGNORE_BASE_GLYPHS 0x0002 |
| #define HB_LOOKUP_FLAG_IGNORE_LIGATURES 0x0004 |
| #define HB_LOOKUP_FLAG_IGNORE_MARKS 0x0008 |
| #define HB_LOOKUP_FLAG_IGNORE_SPECIAL_MARKS 0xFF00 |
| |
| |
| struct HB_CoverageFormat1_ |
| { |
| FT_UShort GlyphCount; /* number of glyphs in GlyphArray */ |
| FT_UShort* GlyphArray; /* array of glyph IDs */ |
| }; |
| |
| typedef struct HB_CoverageFormat1_ HB_CoverageFormat1; |
| |
| |
| struct HB_RangeRecord_ |
| { |
| FT_UShort Start; /* first glyph ID in the range */ |
| FT_UShort End; /* last glyph ID in the range */ |
| FT_UShort StartCoverageIndex; /* coverage index of first |
| glyph ID in the range */ |
| }; |
| |
| typedef struct HB_RangeRecord_ HB_RangeRecord; |
| |
| |
| struct HB_CoverageFormat2_ |
| { |
| FT_UShort RangeCount; /* number of RangeRecords */ |
| HB_RangeRecord* RangeRecord; /* array of RangeRecords */ |
| }; |
| |
| typedef struct HB_CoverageFormat2_ HB_CoverageFormat2; |
| |
| |
| struct HB_Coverage_ |
| { |
| FT_UShort CoverageFormat; /* 1 or 2 */ |
| |
| union |
| { |
| HB_CoverageFormat1 cf1; |
| HB_CoverageFormat2 cf2; |
| } cf; |
| }; |
| |
| typedef struct HB_Coverage_ HB_Coverage; |
| |
| |
| struct HB_ClassDefFormat1_ |
| { |
| FT_UShort StartGlyph; /* first glyph ID of the |
| ClassValueArray */ |
| FT_UShort GlyphCount; /* size of the ClassValueArray */ |
| FT_UShort* ClassValueArray; /* array of class values */ |
| }; |
| |
| typedef struct HB_ClassDefFormat1_ HB_ClassDefFormat1; |
| |
| |
| struct HB_ClassRangeRecord_ |
| { |
| FT_UShort Start; /* first glyph ID in the range */ |
| FT_UShort End; /* last glyph ID in the range */ |
| FT_UShort Class; /* applied to all glyphs in range */ |
| }; |
| |
| typedef struct HB_ClassRangeRecord_ HB_ClassRangeRecord; |
| |
| |
| struct HB_ClassDefFormat2_ |
| { |
| FT_UShort ClassRangeCount; |
| /* number of ClassRangeRecords */ |
| HB_ClassRangeRecord* ClassRangeRecord; |
| /* array of ClassRangeRecords */ |
| }; |
| |
| typedef struct HB_ClassDefFormat2_ HB_ClassDefFormat2; |
| |
| |
| /* The `Defined' field is not defined in the OpenType specification but |
| apparently needed for processing fonts like trado.ttf: This font |
| refers to a class which contains not a single element. We map such |
| classes to class 0. */ |
| |
| struct HB_ClassDefinition_ |
| { |
| FT_Bool loaded; |
| |
| FT_Bool* Defined; /* array of Booleans. |
| If Defined[n] is FALSE, |
| class n contains no glyphs. */ |
| FT_UShort ClassFormat; /* 1 or 2 */ |
| |
| union |
| { |
| HB_ClassDefFormat1 cd1; |
| HB_ClassDefFormat2 cd2; |
| } cd; |
| }; |
| |
| typedef struct HB_ClassDefinition_ HB_ClassDefinition; |
| |
| |
| struct HB_Device_ |
| { |
| FT_UShort StartSize; /* smallest size to correct */ |
| FT_UShort EndSize; /* largest size to correct */ |
| FT_UShort DeltaFormat; /* DeltaValue array data format: |
| 1, 2, or 3 */ |
| FT_UShort* DeltaValue; /* array of compressed data */ |
| }; |
| |
| typedef struct HB_Device_ HB_Device; |
| |
| |
| enum HB_Type_ |
| { |
| HB_Type_GSUB, |
| HB_Type_GPOS |
| }; |
| |
| typedef enum HB_Type_ HB_Type; |
| |
| |
| FT_END_HEADER |
| |
| #endif /* HARFBUZZ_OPEN_H */ |
