icuSources/layout/LookupProcessor.h

   1 /*
   2  * %W% %E%
   3  *
   4  * (C) Copyright IBM Corp. 1998-2013 - 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 "LETableReference.h"
  20 //#include "Lookups.h"
  21 //#include "Features.h"
  22
  23 U_NAMESPACE_BEGIN
  24
  25 class  LEFontInstance;
  26 class  LEGlyphStorage;
  27 class  GlyphIterator;
  28 class  GlyphPositionAdjustments;
  29 struct FeatureTable;
  30 struct FeatureListTable;
  31 struct GlyphDefinitionTableHeader;
  32 struct LookupSubtable;
  33 struct LookupTable;
  34
  35 class LookupProcessor : public UMemory {
  36 public:
  37     le_int32 process(LEGlyphStorage &glyphStorage, GlyphPositionAdjustments *glyphPositionAdjustments,
  38                  le_bool rightToLeft, const LEReferenceTo<GlyphDefinitionTableHeader> &glyphDefinitionTableHeader, const LEFontInstance *fontInstance, LEErrorCode& success) const;
  39
  40     le_uint32 applyLookupTable(const LEReferenceTo<LookupTable> &lookupTable, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
  41
  42     le_uint32 applySingleLookup(le_uint16 lookupTableIndex, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
  43
  44     virtual le_uint32 applySubtable(const LEReferenceTo<LookupSubtable> &lookupSubtable, le_uint16 subtableType,
  45         GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const = 0;
  46
  47     virtual ~LookupProcessor();
  48
  49     const LETableReference &getReference() const { return fReference; }
  50
  51 protected:
  52     LookupProcessor(const LETableReference &baseAddress,
  53         Offset scriptListOffset,
  54         Offset featureListOffset,
  55         Offset lookupListOffset,
  56         LETag scriptTag,
  57         LETag languageTag,
  58         const FeatureMap *featureMap,
  59         le_int32 featureMapCount,
  60         le_bool orderFeatures,
  61         LEErrorCode& success);
  62
  63     LookupProcessor();
  64
  65     le_int32 selectLookups(const LEReferenceTo<FeatureTable> &featureTable, FeatureMask featureMask, le_int32 order, LEErrorCode &success);
  66
  67     LEReferenceTo<LookupListTable>   lookupListTable;
  68     LEReferenceTo<FeatureListTable>  featureListTable;
  69
  70     FeatureMask            *lookupSelectArray;
  71     le_uint32              lookupSelectCount;
  72
  73     le_uint16               *lookupOrderArray;
  74     le_uint32               lookupOrderCount;
  75
  76     LETableReference        fReference;
  77
  78 private:
  79
  80     LookupProcessor(const LookupProcessor &other); // forbid copying of this class
  81     LookupProcessor &operator=(const LookupProcessor &other); // forbid copying of this class
  82 };
  83
  84 U_NAMESPACE_END
  85 #endif