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      1 /***************************************************************************
      2 *
      3 *   Copyright (C) 1998-2006, International Business Machines
      4 *   Corporation and others.  All Rights Reserved.
      5 *
      6 ************************************************************************/
      7 
      8 
      9 #ifndef __CMAPS_H
     10 #define __CMAPS_H
     11 
     12 #include "layout/LETypes.h"
     13 #include "letest.h"
     14 #include "sfnt.h"
     15 
     16 HB_BEGIN_VISIBILITY
     17 
     18 class CMAPMapper
     19 {
     20 public:
     21     virtual LEGlyphID unicodeToGlyph(LEUnicode32 unicode32) const = 0;
     22 
     23     virtual ~CMAPMapper();
     24 
     25     static CMAPMapper *createUnicodeMapper(const CMAPTable *cmap);
     26 
     27 protected:
     28     CMAPMapper(const CMAPTable *cmap);
     29 
     30     CMAPMapper() {};
     31 
     32 private:
     33     const CMAPTable *fcmap;
     34 };
     35 
     36 class CMAPFormat4Mapper : public CMAPMapper
     37 {
     38 public:
     39     CMAPFormat4Mapper(const CMAPTable *cmap, const CMAPFormat4Encoding *header);
     40 
     41     virtual ~CMAPFormat4Mapper();
     42 
     43     virtual LEGlyphID unicodeToGlyph(LEUnicode32 unicode32) const;
     44 
     45 protected:
     46     CMAPFormat4Mapper() {};
     47 
     48 private:
     49     le_uint16       fEntrySelector;
     50     le_uint16       fRangeShift;
     51     const le_uint16 *fEndCodes;
     52     const le_uint16 *fStartCodes;
     53     const le_uint16 *fIdDelta;
     54     const le_uint16 *fIdRangeOffset;
     55 };
     56 
     57 class CMAPGroupMapper : public CMAPMapper
     58 {
     59 public:
     60     CMAPGroupMapper(const CMAPTable *cmap, const CMAPGroup *groups, le_uint32 nGroups);
     61 
     62     virtual ~CMAPGroupMapper();
     63 
     64     virtual LEGlyphID unicodeToGlyph(LEUnicode32 unicode32) const;
     65 
     66 protected:
     67     CMAPGroupMapper() {};
     68 
     69 private:
     70     le_int32 fPower;
     71     le_int32 fRangeOffset;
     72     const CMAPGroup *fGroups;
     73 };
     74 
     75 inline CMAPMapper::CMAPMapper(const CMAPTable *cmap)
     76     : fcmap(cmap)
     77 {
     78     // nothing else to do
     79 }
     80 
     81 inline CMAPMapper::~CMAPMapper()
     82 {
     83 }
     84 
     85 HB_END_VISIBILITY
     86 
     87 #endif
     88