icuSources/layout/MorphTables.h

   1 /*
   2  * @(#)MorphTables.h    1.5 00/03/15
   3  *
   4  * (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved
   5  *
   6  */
   7
   8 #ifndef __MORPHTABLES_H
   9 #define __MORPHTABLES_H
  10
  11 /**
  12  * \file
  13  * \internal
  14  */
  15
  16 #include "LETypes.h"
  17 #include "LayoutTables.h"
  18
  19 U_NAMESPACE_BEGIN
  20
  21 typedef le_uint32 FeatureFlags;
  22
  23 typedef le_int16 FeatureType;
  24 typedef le_int16 FeatureSetting;
  25
  26 struct FeatureTableEntry
  27 {
  28     FeatureType     featureType;
  29     FeatureSetting  featureSetting;
  30     FeatureFlags    enableFlags;
  31     FeatureFlags    disableFlags;
  32 };
  33
  34 struct ChainHeader
  35 {
  36     FeatureFlags        defaultFlags;
  37     le_uint32           chainLength;
  38     le_int16           nFeatureEntries;
  39     le_int16           nSubtables;
  40     FeatureTableEntry   featureTable[ANY_NUMBER];
  41 };
  42
  43 struct MorphTableHeader
  44 {
  45     le_int32    version;
  46     le_uint32   nChains;
  47     ChainHeader chains[ANY_NUMBER];
  48
  49     void process(LEGlyphID *glyphs, le_int32 *glyphIndices, le_int32 glyphCount) const;
  50 };
  51
  52 typedef le_int16 SubtableCoverage;
  53
  54 enum SubtableCoverageFlags
  55 {
  56     scfVertical = 0x8000,
  57     scfReverse  = 0x4000,
  58     scfIgnoreVt = 0x2000,
  59     scfReserved = 0x1FF8,
  60     scfTypeMask = 0x0007
  61 };
  62
  63 enum MorphSubtableType
  64 {
  65     mstIndicRearrangement               = 0,
  66     mstContextualGlyphSubstitution      = 1,
  67     mstLigatureSubstitution             = 2,
  68     mstReservedUnused                   = 3,
  69     mstNonContextualGlyphSubstitution   = 4,
  70     mstContextualGlyphInsertion         = 5
  71 };
  72
  73 struct MorphSubtableHeader
  74 {
  75     le_int16           length;
  76     SubtableCoverage    coverage;
  77     FeatureFlags        subtableFeatures;
  78
  79     void process(LEGlyphID *glyphs, le_int32 *glyphIndices, le_int32 glyphCount) const;
  80 };
  81
  82 U_NAMESPACE_END
  83 #endif
  84