icuSources/samples/layout/cmaps.h

   1 /*
   2  ******************************************************************************
   3  *
   4  *   © 2016 and later: Unicode, Inc. and others.
   5  *   License & terms of use: http://www.unicode.org/copyright.html#License
   6  *
   7  ******************************************************************************
   8  ****************************************************************************** *
   9  *
  10  *   Copyright (C) 1999-2003, International Business Machines
  11  *   Corporation and others.  All Rights Reserved.
  12  *
  13  ****************************************************************************** *
  14  *   file name:  cmaps.h
  15  *
  16  *   created on: ??/??/2001
  17  *   created by: Eric R. Mader
  18  */
  19
  20 #ifndef __CMAPS_H
  21 #define __CMAPS_H
  22
  23 #include "layout/LETypes.h"
  24 #include "sfnt.h"
  25
  26 class CMAPMapper
  27 {
  28 public:
  29     virtual LEGlyphID unicodeToGlyph(LEUnicode32 unicode32) const = 0;
  30
  31     virtual ~CMAPMapper();
  32
  33     static CMAPMapper *createUnicodeMapper(const CMAPTable *cmap);
  34
  35 protected:
  36     CMAPMapper(const CMAPTable *cmap);
  37
  38     CMAPMapper() {};
  39
  40 private:
  41     const CMAPTable *fcmap;
  42 };
  43
  44 class CMAPFormat4Mapper : public CMAPMapper
  45 {
  46 public:
  47     CMAPFormat4Mapper(const CMAPTable *cmap, const CMAPFormat4Encoding *header);
  48
  49     virtual ~CMAPFormat4Mapper();
  50
  51     virtual LEGlyphID unicodeToGlyph(LEUnicode32 unicode32) const;
  52
  53 protected:
  54     CMAPFormat4Mapper() {};
  55
  56 private:
  57     le_uint16        fEntrySelector;
  58     le_uint16        fRangeShift;
  59     const le_uint16 *fEndCodes;
  60     const le_uint16 *fStartCodes;
  61     const le_uint16 *fIdDelta;
  62     const le_uint16 *fIdRangeOffset;
  63 };
  64
  65 class CMAPGroupMapper : public CMAPMapper
  66 {
  67 public:
  68     CMAPGroupMapper(const CMAPTable *cmap, const CMAPGroup *groups, le_uint32 nGroups);
  69
  70     virtual ~CMAPGroupMapper();
  71
  72     virtual LEGlyphID unicodeToGlyph(LEUnicode32 unicode32) const;
  73
  74 protected:
  75     CMAPGroupMapper() {};
  76
  77 private:
  78     le_int32 fPower;
  79     le_int32 fRangeOffset;
  80     const CMAPGroup *fGroups;
  81 };
  82
  83 inline CMAPMapper::CMAPMapper(const CMAPTable *cmap)
  84     : fcmap(cmap)
  85 {
  86     // nothing else to do
  87 }
  88
  89 inline CMAPMapper::~CMAPMapper()
  90 {
  91     LE_DELETE_ARRAY(fcmap);
  92 }
  93
  94 #endif
  95