icuSources/test/perf/leperf/PortableFontInstance.h

   1
   2 /*
   3  *******************************************************************************
   4  *
   5  *   © 2016 and later: Unicode, Inc. and others.
   6  *   License & terms of use: http://www.unicode.org/copyright.html#License
   7  *
   8  *******************************************************************************
   9  *******************************************************************************
  10  *
  11  *   Copyright (C) 1999-2013, International Business Machines
  12  *   Corporation and others.  All Rights Reserved.
  13  *
  14  *******************************************************************************
  15  *   file name:  PortableFontInstance.h
  16  *
  17  *   created on: 11/12/1999
  18  *   created by: Eric R. Mader
  19  */
  20
  21 #ifndef __PORTABLEFONTINSTANCE_H
  22 #define __PORTABLEFONTINSTANCE_H
  23
  24 #include <stdio.h>
  25
  26 #include "layout/LETypes.h"
  27 #include "layout/LEFontInstance.h"
  28
  29 #include "FontTableCache.h"
  30
  31 #include "sfnt.h"
  32 #include "cmaps.h"
  33
  34 class PortableFontInstance : public LEFontInstance, protected FontTableCache
  35 {
  36 private:
  37     FILE *fFile;
  38
  39     float     fPointSize;
  40     le_int32  fUnitsPerEM;
  41     le_uint32 fFontChecksum;
  42     le_int32  fAscent;
  43     le_int32  fDescent;
  44     le_int32  fLeading;
  45
  46     const SFNTDirectory *fDirectory;
  47     le_uint16 fDirPower;
  48     le_uint16 fDirExtra;
  49
  50     float fDeviceScaleX;
  51     float fDeviceScaleY;
  52
  53     const NAMETable *fNAMETable;
  54     le_uint16 fNameCount;
  55     le_uint16 fNameStringOffset;
  56
  57     CMAPMapper *fCMAPMapper;
  58
  59     const HMTXTable *fHMTXTable;
  60     le_uint16 fNumGlyphs;
  61     le_uint16 fNumLongHorMetrics;
  62
  63     static le_int8 highBit(le_int32 value);
  64
  65     const DirectoryEntry *findTable(LETag tag) const;
  66     const void *readTable(LETag tag, le_uint32 *length) const;
  67     void getMetrics();
  68
  69     CMAPMapper *findUnicodeMapper();
  70
  71 protected:
  72     const void *readFontTable(LETag tableTag) const { size_t ignored; return readFontTable(tableTag, ignored); }
  73     const void *readFontTable(LETag tableTag, size_t &length) const;
  74
  75 public:
  76     PortableFontInstance(const char *fileName, float pointSize, LEErrorCode &status);
  77
  78     virtual ~PortableFontInstance();
  79
  80     virtual const void *getFontTable(LETag tableTag) const;
  81     virtual const void *getFontTable(LETag tableTag, size_t &length) const;
  82
  83     virtual const char *getNameString(le_uint16 nameID, le_uint16 platform, le_uint16 encoding, le_uint16 language) const;
  84
  85     virtual const LEUnicode16 *getUnicodeNameString(le_uint16 nameID, le_uint16 platform, le_uint16 encoding, le_uint16 language) const;
  86
  87     virtual void deleteNameString(const char *name) const;
  88
  89     virtual void deleteNameString(const LEUnicode16 *name) const;
  90
  91     virtual le_int32 getUnitsPerEM() const;
  92
  93     virtual le_uint32 getFontChecksum() const;
  94
  95     virtual le_uint32 getRawChecksum() const;
  96
  97     virtual le_int32 getAscent() const;
  98
  99     virtual le_int32 getDescent() const;
 100
 101     virtual le_int32 getLeading() const;
 102
 103     // We really want to inherit this method from the superclass, but some compilers
 104     // issue a warning if we don't implement it...
 105     virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper, le_bool filterZeroWidth) const;
 106
 107     // We really want to inherit this method from the superclass, but some compilers
 108     // issue a warning if we don't implement it...
 109     virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch, const LECharMapper *mapper) const;
 110
 111     virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const;
 112
 113     virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;
 114
 115     virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;
 116
 117     float getXPixelsPerEm() const;
 118
 119     float getYPixelsPerEm() const;
 120
 121     float getScaleFactorX() const;
 122
 123     float getScaleFactorY() const;
 124
 125 };
 126
 127 #endif