| /******************************************************************* |
| * |
| * 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_GDEF_H |
| #define HARFBUZZ_GDEF_H |
| |
| #include "harfbuzz-open.h" |
| |
| FT_BEGIN_HEADER |
| |
| #define HB_Err_Invalid_GDEF_SubTable_Format 0x1030 |
| #define HB_Err_Invalid_GDEF_SubTable 0x1031 |
| |
| |
| /* GDEF glyph properties. Note that HB_GDEF_COMPONENT has no corresponding |
| * flag in the LookupFlag field. */ |
| #define HB_GDEF_BASE_GLYPH 0x0002 |
| #define HB_GDEF_LIGATURE 0x0004 |
| #define HB_GDEF_MARK 0x0008 |
| #define HB_GDEF_COMPONENT 0x0010 |
| |
| |
| typedef struct HB_AttachPoint_ HB_AttachPoint; |
| |
| |
| struct HB_AttachList_ |
| { |
| FT_Bool loaded; |
| |
| HB_Coverage Coverage; /* Coverage table */ |
| FT_UShort GlyphCount; /* number of glyphs with |
| attachments */ |
| HB_AttachPoint* AttachPoint; /* array of AttachPoint tables */ |
| }; |
| |
| typedef struct HB_AttachList_ HB_AttachList; |
| |
| typedef struct HB_LigGlyph_ HB_LigGlyph; |
| |
| struct HB_LigCaretList_ |
| { |
| FT_Bool loaded; |
| |
| HB_Coverage Coverage; /* Coverage table */ |
| FT_UShort LigGlyphCount; /* number of ligature glyphs */ |
| HB_LigGlyph* LigGlyph; /* array of LigGlyph tables */ |
| }; |
| |
| typedef struct HB_LigCaretList_ HB_LigCaretList; |
| |
| |
| |
| /* The `NewGlyphClasses' field is not defined in the TTO specification. |
| We use it for fonts with a constructed `GlyphClassDef' structure |
| (i.e., which don't have a GDEF table) to collect glyph classes |
| assigned during the lookup process. The number of arrays in this |
| pointer array is GlyphClassDef->cd.cd2.ClassRangeCount+1; the nth |
| array then contains the glyph class values of the glyphs not covered |
| by the ClassRangeRecords structures with index n-1 and n. We store |
| glyph class values for four glyphs in a single array element. |
| |
| `LastGlyph' is identical to the number of glyphs minus one in the |
| font; we need it only if `NewGlyphClasses' is not NULL (to have an |
| upper bound for the last array). |
| |
| Note that we first store the file offset to the `MarkAttachClassDef' |
| field (which has been introduced in OpenType 1.2) -- since the |
| `Version' field value hasn't been increased to indicate that we have |
| one more field for some obscure reason, we must parse the GSUB table |
| to find out whether class values refer to this table. Only then we |
| can finally load the MarkAttachClassDef structure if necessary. */ |
| |
| struct HB_GDEFHeader_ |
| { |
| FT_Memory memory; |
| FT_ULong offset; |
| |
| FT_Fixed Version; |
| |
| HB_ClassDefinition GlyphClassDef; |
| HB_AttachList AttachList; |
| HB_LigCaretList LigCaretList; |
| FT_ULong MarkAttachClassDef_offset; |
| HB_ClassDefinition MarkAttachClassDef; /* new in OT 1.2 */ |
| |
| FT_UShort LastGlyph; |
| FT_UShort** NewGlyphClasses; |
| }; |
| |
| typedef struct HB_GDEFHeader_ HB_GDEFHeader; |
| typedef struct HB_GDEFHeader_* HB_GDEF; |
| |
| |
| FT_Error HB_New_GDEF_Table( FT_Face face, |
| HB_GDEFHeader** retptr ); |
| |
| |
| FT_Error HB_Load_GDEF_Table( FT_Face face, |
| HB_GDEFHeader** gdef ); |
| |
| |
| FT_Error HB_Done_GDEF_Table ( HB_GDEFHeader* gdef ); |
| |
| |
| FT_Error HB_GDEF_Get_Glyph_Property( HB_GDEFHeader* gdef, |
| FT_UShort glyphID, |
| FT_UShort* property ); |
| |
| FT_Error HB_GDEF_Build_ClassDefinition( HB_GDEFHeader* gdef, |
| FT_UShort num_glyphs, |
| FT_UShort glyph_count, |
| FT_UShort* glyph_array, |
| FT_UShort* class_array ); |
| |
| |
| FT_END_HEADER |
| |
| #endif /* HARFBUZZ_GDEF_H */ |