icuSources/layout/Lookups.h

   1 /*
   2  *
   3  * (C) Copyright IBM Corp. 1998-2004 - 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     le_int32  getGlyphCoverage(LEGlyphID glyphID) const;
  37     le_int32  getGlyphCoverage(Offset tableOffset, LEGlyphID glyphID) const;
  38 };
  39
  40 struct LookupTable
  41 {
  42     le_uint16       lookupType;
  43     le_uint16       lookupFlags;
  44     le_uint16       subTableCount;
  45     Offset          subTableOffsetArray[ANY_NUMBER];
  46
  47     const LookupSubtable  *getLookupSubtable(le_uint16 subtableIndex) const;
  48 };
  49
  50 struct LookupListTable
  51 {
  52     le_uint16   lookupCount;
  53     Offset      lookupTableOffsetArray[ANY_NUMBER];
  54
  55     const LookupTable *getLookupTable(le_uint16 lookupTableIndex) const;
  56 };
  57
  58 inline le_int32 LookupSubtable::getGlyphCoverage(LEGlyphID glyphID) const
  59 {
  60     return getGlyphCoverage(coverageTableOffset, glyphID);
  61 }
  62
  63 U_NAMESPACE_END
  64 #endif