icuSources/samples/layout/GnomeFontInstance.h

   1
   2 /*
   3  *******************************************************************************
   4  *
   5  *   Copyright (C) 1999-2006, 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 <ft2build.h>
  20 #include FT_FREETYPE_H
  21 #include FT_GLYPH_H
  22 #include <cairo.h>
  23
  24 #include "layout/LETypes.h"
  25 #include "layout/LEFontInstance.h"
  26
  27 #include "RenderingSurface.h"
  28 #include "FontTableCache.h"
  29 #include "cmaps.h"
  30
  31 class GnomeSurface : public RenderingSurface
  32 {
  33 public:
  34     GnomeSurface(GtkWidget *theWidget);
  35     virtual ~GnomeSurface();
  36
  37     virtual void drawGlyphs(const LEFontInstance *font, const LEGlyphID *glyphs, le_int32 count,
  38         const float *positions, le_int32 x, le_int32 y, le_int32 width, le_int32 height);
  39
  40     GtkWidget *getWidget() const;
  41     void setWidget(GtkWidget *theWidget);
  42
  43 private:
  44     GtkWidget *fWidget;
  45     cairo_t   *fCairo;
  46 };
  47
  48 class GnomeFontInstance : public LEFontInstance, protected FontTableCache
  49 {
  50  protected:
  51     FT_Face fFace;
  52 //  FT_Glyph fGlyph;
  53
  54     cairo_font_face_t *fCairoFace;
  55
  56     le_int32 fPointSize;
  57     le_int32 fUnitsPerEM;
  58     le_int32 fAscent;
  59     le_int32 fDescent;
  60     le_int32 fLeading;
  61
  62     float fDeviceScaleX;
  63     float fDeviceScaleY;
  64
  65     CMAPMapper *fMapper;
  66
  67     virtual const void *readFontTable(LETag tableTag) const;
  68
  69     virtual LEErrorCode initMapper();
  70
  71  public:
  72     GnomeFontInstance(FT_Library engine, const char *fontPathName, le_int16 pointSize, LEErrorCode &status);
  73
  74     virtual ~GnomeFontInstance();
  75
  76     virtual const void *getFontTable(LETag tableTag) const;
  77
  78     virtual le_int32 getUnitsPerEM() const;
  79
  80     virtual le_int32 getAscent() const;
  81
  82     virtual le_int32 getDescent() const;
  83
  84     virtual le_int32 getLeading() const;
  85
  86     virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const;
  87
  88     virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;
  89
  90     virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;
  91
  92     float getXPixelsPerEm() const;
  93
  94     float getYPixelsPerEm() const;
  95
  96     float getScaleFactorX() const;
  97
  98     float getScaleFactorY() const;
  99
 100     void rasterizeGlyphs(cairo_t *cairo, const LEGlyphID *glyphs, le_int32 glyphCount, const float *positions,
 101                                    le_int32 x, le_int32 y) const;
 102 };
 103
 104 inline GtkWidget *GnomeSurface::getWidget() const
 105 {
 106     return fWidget;
 107 }
 108
 109 inline void GnomeSurface::setWidget(GtkWidget *theWidget)
 110 {
 111     fWidget = theWidget;
 112 }
 113
 114 /*
 115 inline FT_Instance GnomeFontInstance::getFont() const
 116 {
 117     return fInstance;
 118 }
 119 */
 120
 121 inline le_int32 GnomeFontInstance::getUnitsPerEM() const
 122 {
 123     return fUnitsPerEM;
 124 }
 125
 126 inline le_int32 GnomeFontInstance::getAscent() const
 127 {
 128     return fAscent;
 129 }
 130
 131 inline le_int32 GnomeFontInstance::getDescent() const
 132 {
 133     return fDescent;
 134 }
 135
 136 inline le_int32 GnomeFontInstance::getLeading() const
 137 {
 138     return fLeading;
 139 }
 140
 141 inline LEGlyphID GnomeFontInstance::mapCharToGlyph(LEUnicode32 ch) const
 142 {
 143     return fMapper->unicodeToGlyph(ch);
 144 }
 145
 146 inline float GnomeFontInstance::getXPixelsPerEm() const
 147 {
 148     return (float) fPointSize;
 149 }
 150
 151 inline float GnomeFontInstance::getYPixelsPerEm() const
 152 {
 153     return  (float) fPointSize;
 154 }
 155
 156 inline float GnomeFontInstance::getScaleFactorX() const
 157 {
 158     return fDeviceScaleX;
 159 }
 160
 161 inline float GnomeFontInstance::getScaleFactorY() const
 162 {
 163     return fDeviceScaleY;
 164 }
 165
 166 #endif