icuSources/samples/layout/GDIFontInstance.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) 1999-2003, International Business Machines
  12  *   Corporation and others.  All Rights Reserved.
  13  *
  14  *******************************************************************************
  15  *   file name:  GDIFontInstance.h
  16  *
  17  *   created on: 08/09/2000
  18  *   created by: Eric R. Mader
  19  */
  20
  21 #ifndef __GDIFONTINSTANCE_H
  22 #define __GDIFONTINSTANCE_H
  23
  24 #include <windows.h>
  25
  26 #include "layout/LETypes.h"
  27 #include "layout/LEFontInstance.h"
  28 #include "RenderingSurface.h"
  29 #include "FontTableCache.h"
  30 #include "cmaps.h"
  31
  32 class GDIFontInstance;
  33
  34 class GDISurface : public RenderingSurface
  35 {
  36 public:
  37     GDISurface(HDC theHDC);
  38     virtual ~GDISurface();
  39
  40     virtual void drawGlyphs(const LEFontInstance *font, const LEGlyphID *glyphs, le_int32 count,
  41         const float *positions, le_int32 x, le_int32 y, le_int32 width, le_int32 height);
  42
  43     void setFont(const GDIFontInstance *font);
  44     HDC  getHDC() const;
  45     void setHDC(HDC theHDC);
  46
  47 private:
  48     HDC fHdc;
  49     const GDIFontInstance *fCurrentFont;
  50 };
  51
  52 inline HDC GDISurface::getHDC() const
  53 {
  54     return fHdc;
  55 }
  56
  57 class GDIFontInstance : public LEFontInstance, protected FontTableCache
  58 {
  59 protected:
  60     GDISurface *fSurface;
  61     HFONT fFont;
  62
  63     le_int32 fPointSize;
  64     le_int32 fUnitsPerEM;
  65     le_int32 fAscent;
  66     le_int32 fDescent;
  67     le_int32 fLeading;
  68
  69     float fDeviceScaleX;
  70     float fDeviceScaleY;
  71
  72     CMAPMapper *fMapper;
  73
  74     virtual const void *readFontTable(LETag tableTag) const;
  75
  76     virtual LEErrorCode initMapper();
  77
  78 public:
  79     GDIFontInstance(GDISurface *surface, TCHAR *faceName, le_int16 pointSize, LEErrorCode &status);
  80     GDIFontInstance(GDISurface *surface, const char *faceName, le_int16 pointSize, LEErrorCode &status);
  81     //GDIFontInstance(GDISurface *surface, le_int16 pointSize);
  82
  83     virtual ~GDIFontInstance();
  84
  85     HFONT getFont() const;
  86
  87     virtual const void *getFontTable(LETag tableTag) const;
  88
  89     virtual le_int32 getUnitsPerEM() const;
  90
  91     virtual le_int32 getAscent() const;
  92
  93     virtual le_int32 getDescent() const;
  94
  95     virtual le_int32 getLeading() const;
  96
  97     virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const;
  98
  99     virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;
 100
 101     virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;
 102
 103     float getXPixelsPerEm() const;
 104
 105     float getYPixelsPerEm() const;
 106
 107     float getScaleFactorX() const;
 108
 109     float getScaleFactorY() const;
 110 };
 111
 112 inline HFONT GDIFontInstance::getFont() const
 113 {
 114     return fFont;
 115 }
 116
 117 inline le_int32 GDIFontInstance::getUnitsPerEM() const
 118 {
 119     return fUnitsPerEM;
 120 }
 121
 122 inline le_int32 GDIFontInstance::getAscent() const
 123 {
 124     return fAscent;
 125 }
 126
 127 inline le_int32 GDIFontInstance::getDescent() const
 128 {
 129     return fDescent;
 130 }
 131
 132 inline le_int32 GDIFontInstance::getLeading() const
 133 {
 134     return fLeading;
 135 }
 136
 137 inline LEGlyphID GDIFontInstance::mapCharToGlyph(LEUnicode32 ch) const
 138 {
 139     return fMapper->unicodeToGlyph(ch);
 140 }
 141
 142 inline float GDIFontInstance::getXPixelsPerEm() const
 143 {
 144     return (float) fPointSize;
 145 }
 146
 147 inline float GDIFontInstance::getYPixelsPerEm() const
 148 {
 149     return  (float) fPointSize;
 150 }
 151
 152 inline float GDIFontInstance::getScaleFactorX() const
 153 {
 154     return fDeviceScaleX;
 155 }
 156
 157 inline float GDIFontInstance::getScaleFactorY() const
 158 {
 159     return fDeviceScaleY;
 160 }
 161
 162 #endif