icuSources/samples/layout/GDIFontInstance.h

   1
   2 /*
   3  *******************************************************************************
   4  *
   5  *   Copyright (C) 1999-2003, International Business Machines
   6  *   Corporation and others.  All Rights Reserved.
   7  *
   8  *******************************************************************************
   9  *   file name:  GDIFontInstance.h
  10  *
  11  *   created on: 08/09/2000
  12  *   created by: Eric R. Mader
  13  */
  14
  15 #ifndef __GDIFONTINSTANCE_H
  16 #define __GDIFONTINSTANCE_H
  17
  18 #include <windows.h>
  19
  20 #include "layout/LETypes.h"
  21 #include "layout/LEFontInstance.h"
  22 #include "RenderingSurface.h"
  23 #include "FontTableCache.h"
  24 #include "cmaps.h"
  25
  26 class GDIFontInstance;
  27
  28 class GDISurface : public RenderingSurface
  29 {
  30 public:
  31     GDISurface(HDC theHDC);
  32     virtual ~GDISurface();
  33
  34     virtual void drawGlyphs(const LEFontInstance *font, const LEGlyphID *glyphs, le_int32 count,
  35         const float *positions, le_int32 x, le_int32 y, le_int32 width, le_int32 height);
  36
  37     void setFont(const GDIFontInstance *font);
  38     HDC  getHDC() const;
  39     void setHDC(HDC theHDC);
  40
  41 private:
  42     HDC fHdc;
  43     const GDIFontInstance *fCurrentFont;
  44 };
  45
  46 inline HDC GDISurface::getHDC() const
  47 {
  48     return fHdc;
  49 }
  50
  51 class GDIFontInstance : public LEFontInstance, protected FontTableCache
  52 {
  53 protected:
  54     GDISurface *fSurface;
  55     HFONT fFont;
  56
  57     le_int32 fPointSize;
  58     le_int32 fUnitsPerEM;
  59     le_int32 fAscent;
  60     le_int32 fDescent;
  61     le_int32 fLeading;
  62
  63     float fDeviceScaleX;
  64     float fDeviceScaleY;
  65
  66     CMAPMapper *fMapper;
  67
  68     virtual const void *readFontTable(LETag tableTag) const;
  69
  70     virtual LEErrorCode initMapper();
  71
  72 public:
  73     GDIFontInstance(GDISurface *surface, TCHAR *faceName, le_int16 pointSize, LEErrorCode &status);
  74     GDIFontInstance(GDISurface *surface, const char *faceName, le_int16 pointSize, LEErrorCode &status);
  75     //GDIFontInstance(GDISurface *surface, le_int16 pointSize);
  76
  77     virtual ~GDIFontInstance();
  78
  79     HFONT getFont() const;
  80
  81     virtual const void *getFontTable(LETag tableTag) const;
  82
  83     virtual le_int32 getUnitsPerEM() const;
  84
  85     virtual le_int32 getAscent() const;
  86
  87     virtual le_int32 getDescent() const;
  88
  89     virtual le_int32 getLeading() const;
  90
  91     virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const;
  92
  93     virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;
  94
  95     virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;
  96
  97     float getXPixelsPerEm() const;
  98
  99     float getYPixelsPerEm() const;
 100
 101     float getScaleFactorX() const;
 102
 103     float getScaleFactorY() const;
 104 };
 105
 106 inline HFONT GDIFontInstance::getFont() const
 107 {
 108     return fFont;
 109 }
 110
 111 inline le_int32 GDIFontInstance::getUnitsPerEM() const
 112 {
 113     return fUnitsPerEM;
 114 }
 115
 116 inline le_int32 GDIFontInstance::getAscent() const
 117 {
 118     return fAscent;
 119 }
 120
 121 inline le_int32 GDIFontInstance::getDescent() const
 122 {
 123     return fDescent;
 124 }
 125
 126 inline le_int32 GDIFontInstance::getLeading() const
 127 {
 128     return fLeading;
 129 }
 130
 131 inline LEGlyphID GDIFontInstance::mapCharToGlyph(LEUnicode32 ch) const
 132 {
 133     return fMapper->unicodeToGlyph(ch);
 134 }
 135
 136 inline float GDIFontInstance::getXPixelsPerEm() const
 137 {
 138     return (float) fPointSize;
 139 }
 140
 141 inline float GDIFontInstance::getYPixelsPerEm() const
 142 {
 143     return  (float) fPointSize;
 144 }
 145
 146 inline float GDIFontInstance::getScaleFactorX() const
 147 {
 148     return fDeviceScaleX;
 149 }
 150
 151 inline float GDIFontInstance::getScaleFactorY() const
 152 {
 153     return fDeviceScaleY;
 154 }
 155
 156 #endif