icuSources/samples/layout/cmaps.h

   1 /*
   2  ****************************************************************************** *
   3  *
   4  *   Copyright (C) 1999-2003, International Business Machines
   5  *   Corporation and others.  All Rights Reserved.
   6  *
   7  ****************************************************************************** *
   8  *   file name:  cmaps.h
   9  *
  10  *   created on: ??/??/2001
  11  *   created by: Eric R. Mader
  12  */
  13
  14 #ifndef __CMAPS_H
  15 #define __CMAPS_H
  16
  17 #include "layout/LETypes.h"
  18 #include "sfnt.h"
  19
  20 class CMAPMapper
  21 {
  22 public:
  23     virtual LEGlyphID unicodeToGlyph(LEUnicode32 unicode32) const = 0;
  24
  25     virtual ~CMAPMapper();
  26
  27     static CMAPMapper *createUnicodeMapper(const CMAPTable *cmap);
  28
  29 protected:
  30     CMAPMapper(const CMAPTable *cmap);
  31
  32     CMAPMapper() {};
  33
  34 private:
  35     const CMAPTable *fcmap;
  36 };
  37
  38 class CMAPFormat4Mapper : public CMAPMapper
  39 {
  40 public:
  41     CMAPFormat4Mapper(const CMAPTable *cmap, const CMAPFormat4Encoding *header);
  42
  43     virtual ~CMAPFormat4Mapper();
  44
  45     virtual LEGlyphID unicodeToGlyph(LEUnicode32 unicode32) const;
  46
  47 protected:
  48     CMAPFormat4Mapper() {};
  49
  50 private:
  51     le_uint16        fEntrySelector;
  52     le_uint16        fRangeShift;
  53     const le_uint16 *fEndCodes;
  54     const le_uint16 *fStartCodes;
  55     const le_uint16 *fIdDelta;
  56     const le_uint16 *fIdRangeOffset;
  57 };
  58
  59 class CMAPGroupMapper : public CMAPMapper
  60 {
  61 public:
  62     CMAPGroupMapper(const CMAPTable *cmap, const CMAPGroup *groups, le_uint32 nGroups);
  63
  64     virtual ~CMAPGroupMapper();
  65
  66     virtual LEGlyphID unicodeToGlyph(LEUnicode32 unicode32) const;
  67
  68 protected:
  69     CMAPGroupMapper() {};
  70
  71 private:
  72     le_int32 fPower;
  73     le_int32 fRangeOffset;
  74     const CMAPGroup *fGroups;
  75 };
  76
  77 inline CMAPMapper::CMAPMapper(const CMAPTable *cmap)
  78     : fcmap(cmap)
  79 {
  80     // nothing else to do
  81 }
  82
  83 inline CMAPMapper::~CMAPMapper()
  84 {
  85     LE_DELETE_ARRAY(fcmap);
  86 }
  87
  88 #endif
  89