icuSources/layout/LookupProcessor.h

   1 /*
   2  * %W% %E%
   3  *
   4  * (C) Copyright IBM Corp. 1998-2004 - 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 #include "GlyphDefinitionTables.h"
  22 #include "GlyphPositionAdjustments.h"
  23 #include "GlyphIterator.h"
  24
  25 U_NAMESPACE_BEGIN
  26
  27 class LEGlyphStorage;
  28
  29 class LookupProcessor : public UMemory {
  30 public:
  31     static const LETag notSelected;
  32     static const LETag defaultFeature;
  33
  34     le_int32 process(LEGlyphStorage &glyphStorage, GlyphPositionAdjustment *glyphPositionAdjustments,
  35                  le_bool rightToLeft, const GlyphDefinitionTableHeader *glyphDefinitionTableHeader, const LEFontInstance *fontInstance) const;
  36
  37     le_uint32 applyLookupTable(const LookupTable *lookupTable, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
  38
  39     le_uint32 applySingleLookup(le_uint16 lookupTableIndex, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const;
  40
  41     virtual le_uint32 applySubtable(const LookupSubtable *lookupSubtable, le_uint16 subtableType,
  42         GlyphIterator *glyphIterator, const LEFontInstance *fontInstance) const = 0;
  43
  44     virtual ~LookupProcessor();
  45
  46 protected:
  47     LookupProcessor(const char *baseAddress,
  48         Offset scriptListOffset, Offset featureListOffset, Offset lookupListOffset,
  49         LETag scriptTag, LETag languageTag, const LETag *featureOrder);
  50
  51     LookupProcessor();
  52
  53     le_int32 selectLookups(const FeatureTable *featureTable, LETag featureTag, le_int32 order);
  54
  55     const LookupListTable   *lookupListTable;
  56     const FeatureListTable  *featureListTable;
  57
  58     LETag                   *lookupSelectArray;
  59     LETag                   requiredFeatureTag;
  60
  61     le_uint16               *lookupOrderArray;
  62     le_uint32               lookupOrderCount;
  63
  64 private:
  65
  66     LookupProcessor(const LookupProcessor &other); // forbid copying of this class
  67     LookupProcessor &operator=(const LookupProcessor &other); // forbid copying of this class
  68 };
  69
  70 U_NAMESPACE_END
  71 #endif