icuSources/layout/LookupProcessor.h

   1 /*
   2  * %W% %E%
   3  *
   4  * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
   5  *
   6  */
   7
   8 #ifndef __LOOKUPPROCESSOR_H
   9 #define __LOOKUPPROCESSOR_H
  10
  11 /**
  12  * \file
  13  * \internal
  14  */
  15
  16 #include "LETypes.h"
  17 #include "LEFontInstance.h"
  18 #include "OpenTypeTables.h"
  19 //#include "Lookups.h"
  20 //#include "Features.h"
  21
  22 U_NAMESPACE_BEGIN
  23
  24 class  LEFontInstance;
  25 class  LEGlyphStorage;
  26 class  GlyphIterator;
  27 class  GlyphPositionAdjustments;
  28 struct FeatureTable;
  29 struct FeatureListTable;
  30 struct GlyphDefinitionTableHeader;
  31 struct LookupSubtable;
  32 struct LookupTable;
  33
  34 class LookupProcessor : public UMemory {
  35 public:
  36     le_int32 process(LEGlyphStorage &glyphStorage, GlyphPositionAdjustments *glyphPositionAdjustments,
  37                  le_bool rightToLeft, const GlyphDefinitionTableHeader *glyphDefinitionTableHeader, const LEFontInstance *fontInstance) const;
  38
  39     le_uint32 applyLookupTable(const LookupTable *lookupTable, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
  40
  41     le_uint32 applySingleLookup(le_uint16 lookupTableIndex, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
  42
  43     virtual le_uint32 applySubtable(const LookupSubtable *lookupSubtable, le_uint16 subtableType,
  44         GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const = 0;
  45
  46     virtual ~LookupProcessor();
  47
  48 protected:
  49      LookupProcessor(const char *baseAddress,
  50         Offset scriptListOffset, Offset featureListOffset, Offset lookupListOffset,
  51         LETag scriptTag, LETag languageTag, const FeatureMap *featureMap, le_int32 featureMapCount, le_bool orderFeatures);
  52
  53    LookupProcessor();
  54
  55     le_int32 selectLookups(const FeatureTable *featureTable, FeatureMask featureMask, le_int32 order);
  56
  57     const LookupListTable   *lookupListTable;
  58     const FeatureListTable  *featureListTable;
  59
  60     FeatureMask            *lookupSelectArray;
  61
  62     le_uint16               *lookupOrderArray;
  63     le_uint32               lookupOrderCount;
  64
  65 private:
  66
  67     LookupProcessor(const LookupProcessor &other); // forbid copying of this class
  68     LookupProcessor &operator=(const LookupProcessor &other); // forbid copying of this class
  69 };
  70
  71 U_NAMESPACE_END
  72 #endif