1 /* 2 * 3 * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved 4 * 5 */ 6 7 #ifndef __LOOKUPS_H 8 #define __LOOKUPS_H 9 10 /** 11 * \file 12 * \internal 13 */ 14 15 #include "LETypes.h" 16 #include "OpenTypeTables.h" 17 18 U_NAMESPACE_BEGIN 19 20 enum LookupFlags 21 { 22 lfBaselineIsLogicalEnd = 0x0001, // The MS spec. calls this flag "RightToLeft" but this name is more accurate 23 lfIgnoreBaseGlyphs = 0x0002, 24 lfIgnoreLigatures = 0x0004, 25 lfIgnoreMarks = 0x0008, 26 lfReservedMask = 0x00F0, 27 lfMarkAttachTypeMask = 0xFF00, 28 lfMarkAttachTypeShift = 8 29 }; 30 31 struct LookupSubtable 32 { 33 le_uint16 subtableFormat; 34 Offset coverageTableOffset; 35 36 inline le_int32 getGlyphCoverage(const LEReferenceTo<LookupSubtable> &base, LEGlyphID glyphID, LEErrorCode &success) const; 37 38 le_int32 getGlyphCoverage(const LEReferenceTo<LookupSubtable> &base, Offset tableOffset, LEGlyphID glyphID, LEErrorCode &success) const; 39 40 // convenience 41 inline le_int32 getGlyphCoverage(const LETableReference &base, LEGlyphID glyphID, LEErrorCode &success) const; 42 43 inline le_int32 getGlyphCoverage(const LETableReference &base, Offset tableOffset, LEGlyphID glyphID, LEErrorCode &success) const; 44 }; 45 46 struct LookupTable 47 { 48 le_uint16 lookupType; 49 le_uint16 lookupFlags; 50 le_uint16 subTableCount; 51 Offset subTableOffsetArray[ANY_NUMBER]; 52 53 const LEReferenceTo<LookupSubtable> getLookupSubtable(const LEReferenceTo<LookupTable> &base, le_uint16 subtableIndex, LEErrorCode &success) const; 54 }; 55 LE_VAR_ARRAY(LookupTable, subTableOffsetArray) 56 57 struct LookupListTable 58 { 59 le_uint16 lookupCount; 60 Offset lookupTableOffsetArray[ANY_NUMBER]; 61 62 const LEReferenceTo<LookupTable> getLookupTable(const LEReferenceTo<LookupListTable> &base, le_uint16 lookupTableIndex, LEErrorCode &success) const; 63 }; 64 LE_VAR_ARRAY(LookupListTable, lookupTableOffsetArray) 65 66 inline le_int32 LookupSubtable::getGlyphCoverage(const LEReferenceTo<LookupSubtable> &base, LEGlyphID glyphID, LEErrorCode &success) const 67 { 68 return getGlyphCoverage(base, coverageTableOffset, glyphID, success); 69 } 70 71 inline le_int32 LookupSubtable::getGlyphCoverage(const LETableReference &base, LEGlyphID glyphID, LEErrorCode &success) const { 72 LEReferenceTo<LookupSubtable> thisRef(base, success, this); 73 return getGlyphCoverage(thisRef, glyphID, success); 74 } 75 76 inline le_int32 LookupSubtable::getGlyphCoverage(const LETableReference &base, Offset tableOffset, LEGlyphID glyphID, LEErrorCode &success) const { 77 LEReferenceTo<LookupSubtable> thisRef(base, success, this); 78 return getGlyphCoverage(thisRef, tableOffset, glyphID, success); 79 } 80 81 U_NAMESPACE_END 82 #endif 83
