icuSources/samples/layout/GnomeFontInstance.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:  GnomeFontInstance.h
  10  *
  11  *   created on: 08/30/2001
  12  *   created by: Eric R. Mader
  13  */
  14
  15 #ifndef __GNOMEFONTINSTANCE_H
  16 #define __GNOMEFONTINSTANCE_H
  17
  18 #include <gnome.h>
  19 #include "freetype/freetype.h"
  20
  21 #include "layout/LETypes.h"
  22 #include "layout/LEFontInstance.h"
  23
  24 #include "RenderingSurface.h"
  25 #include "FontTableCache.h"
  26 #include "cmaps.h"
  27
  28 class GnomeSurface : public RenderingSurface
  29 {
  30 public:
  31     GnomeSurface(GtkWidget *theWidget);
  32     virtual ~GnomeSurface();
  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     GtkWidget *getWidget() const;
  38     void setWidget(GtkWidget *theWidget);
  39
  40 private:
  41     GtkWidget *fWidget;
  42 };
  43
  44 class GnomeFontInstance : public LEFontInstance, protected FontTableCache
  45 {
  46  protected:
  47     TT_Face fFace;
  48     TT_Instance fInstance;
  49     TT_Glyph fGlyph;
  50
  51     le_int32 fPointSize;
  52     le_int32 fUnitsPerEM;
  53     le_int32 fAscent;
  54     le_int32 fDescent;
  55     le_int32 fLeading;
  56
  57     float fDeviceScaleX;
  58     float fDeviceScaleY;
  59
  60     CMAPMapper *fMapper;
  61
  62     virtual const void *readFontTable(LETag tableTag) const;
  63
  64     virtual LEErrorCode initMapper();
  65
  66  public:
  67     GnomeFontInstance(TT_Engine engine, const TT_Text *fontPathName, le_int16 pointSize, LEErrorCode &status);
  68
  69     virtual ~GnomeFontInstance();
  70
  71     TT_Instance getFont() const;
  72
  73     virtual const void *getFontTable(LETag tableTag) const;
  74
  75     virtual le_int32 getUnitsPerEM() const;
  76
  77     virtual le_int32 getAscent() const;
  78
  79     virtual le_int32 getDescent() const;
  80
  81     virtual le_int32 getLeading() const;
  82
  83     virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const;
  84
  85     virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;
  86
  87     virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;
  88
  89     float getXPixelsPerEm() const;
  90
  91     float getYPixelsPerEm() const;
  92
  93     float getScaleFactorX() const;
  94
  95     float getScaleFactorY() const;
  96
  97     TT_Raster_Map *rasterizeGlyphs(const LEGlyphID *glyphs, le_int32 glyphCount, const le_int32 *dx, const le_int32 *dy,
  98                                    le_int32 &xOffset, le_int32 &yOffset) const;
  99
 100     void freeRaster(TT_Raster_Map *raster);
 101 };
 102
 103 inline GtkWidget *GnomeSurface::getWidget() const
 104 {
 105     return fWidget;
 106 }
 107
 108 inline void GnomeSurface::setWidget(GtkWidget *theWidget)
 109 {
 110     fWidget = theWidget;
 111 }
 112
 113 inline TT_Instance GnomeFontInstance::getFont() const
 114 {
 115     return fInstance;
 116 }
 117
 118 inline le_int32 GnomeFontInstance::getUnitsPerEM() const
 119 {
 120     return fUnitsPerEM;
 121 }
 122
 123 inline le_int32 GnomeFontInstance::getAscent() const
 124 {
 125     return fAscent;
 126 }
 127
 128 inline le_int32 GnomeFontInstance::getDescent() const
 129 {
 130     return fDescent;
 131 }
 132
 133 inline le_int32 GnomeFontInstance::getLeading() const
 134 {
 135     return fLeading;
 136 }
 137
 138 inline LEGlyphID GnomeFontInstance::mapCharToGlyph(LEUnicode32 ch) const
 139 {
 140     return fMapper->unicodeToGlyph(ch);
 141 }
 142
 143 inline float GnomeFontInstance::getXPixelsPerEm() const
 144 {
 145     return (float) fPointSize;
 146 }
 147
 148 inline float GnomeFontInstance::getYPixelsPerEm() const
 149 {
 150     return  (float) fPointSize;
 151 }
 152
 153 inline float GnomeFontInstance::getScaleFactorX() const
 154 {
 155     return fDeviceScaleX;
 156 }
 157
 158 inline float GnomeFontInstance::getScaleFactorY() const
 159 {
 160     return fDeviceScaleY;
 161 }
 162
 163 #endif