icuSources/layout/LookupProcessor.h

   1 /*
   2  * %W% %E%
   3  *
   4  * (C) Copyright IBM Corp. 1998-2016 - 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
  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
  33 class LookupProcessor : public UMemory {
  34 public:
  35     le_int32 process(LEGlyphStorage &glyphStorage, GlyphPositionAdjustments *glyphPositionAdjustments,
  36                  le_bool rightToLeft, const LEReferenceTo<GlyphDefinitionTableHeader> &glyphDefinitionTableHeader, const LEFontInstance *fontInstance, LEErrorCode& success) const;
  37
  38     le_uint32 applyLookupTable(const LEReferenceTo<LookupTable> &lookupTable, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
  39
  40     le_uint32 applySingleLookup(le_uint16 lookupTableIndex, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const;
  41
  42     virtual le_uint32 applySubtable(const LEReferenceTo<LookupSubtable> &lookupSubtable, le_uint16 subtableType,
  43         GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode& success) const = 0;
  44
  45     virtual ~LookupProcessor();
  46
  47     const LETableReference &getReference() const { return fReference; }
  48
  49 protected:
  50     LookupProcessor(const LETableReference &baseAddress,
  51         Offset scriptListOffset,
  52         Offset featureListOffset,
  53         Offset lookupListOffset,
  54         LETag scriptTag,
  55         LETag languageTag,
  56         const FeatureMap *featureMap,
  57         le_int32 featureMapCount,
  58         le_bool orderFeatures,
  59         LEErrorCode& success);
  60
  61     LookupProcessor();
  62
  63     le_int32 selectLookups(const LEReferenceTo<FeatureTable> &featureTable, FeatureMask featureMask, le_int32 order, LEErrorCode &success);
  64
  65     LEReferenceTo<LookupListTable>   lookupListTable;
  66     LEReferenceTo<FeatureListTable>  featureListTable;
  67
  68     FeatureMask            *lookupSelectArray;
  69     le_uint32              lookupSelectCount;
  70
  71     le_uint16               *lookupOrderArray;
  72     le_uint32               lookupOrderCount;
  73
  74     LETableReference        fReference;
  75
  76 private:
  77
  78     LookupProcessor(const LookupProcessor &other); // forbid copying of this class
  79     LookupProcessor &operator=(const LookupProcessor &other); // forbid copying of this class
  80 };
  81
  82 U_NAMESPACE_END
  83 #endif