icuSources/layout/LookupProcessor.h

   1 /*
   2  * %W% %E%
   3  *
   4  * (C) Copyright IBM Corp. 1998-2011 - 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, LEErrorCode& success) const;
  38
  39     le_uint32 applyLookupTable(const LookupTable *lookupTable, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
  40
  41     le_uint32 applySingleLookup(le_uint16 lookupTableIndex, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
  42
  43     virtual le_uint32 applySubtable(const LookupSubtable *lookupSubtable, le_uint16 subtableType,
  44         GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const = 0;
  45
  46     virtual ~LookupProcessor();
  47
  48 protected:
  49     LookupProcessor(const char *baseAddress,
  50         Offset scriptListOffset,
  51         Offset featureListOffset,
  52         Offset lookupListOffset,
  53         LETag scriptTag,
  54         LETag languageTag,
  55         const FeatureMap *featureMap,
  56         le_int32 featureMapCount,
  57         le_bool orderFeatures,
  58         LEErrorCode& success);
  59
  60     LookupProcessor();
  61
  62     le_int32 selectLookups(const FeatureTable *featureTable, FeatureMask featureMask, le_int32 order);
  63
  64     const LookupListTable   *lookupListTable;
  65     const FeatureListTable  *featureListTable;
  66
  67     FeatureMask            *lookupSelectArray;
  68     le_uint32              lookupSelectCount;
  69
  70     le_uint16               *lookupOrderArray;
  71     le_uint32               lookupOrderCount;
  72
  73 private:
  74
  75     LookupProcessor(const LookupProcessor &other); // forbid copying of this class
  76     LookupProcessor &operator=(const LookupProcessor &other); // forbid copying of this class
  77 };
  78
  79 U_NAMESPACE_END
  80 #endif