icuSources/samples/layout/GnomeFontInstance.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) 1999-2006, International Business Machines
  12  *   Corporation and others.  All Rights Reserved.
  13  *
  14  *******************************************************************************
  15  *   file name:  GnomeFontInstance.h
  16  *
  17  *   created on: 08/30/2001
  18  *   created by: Eric R. Mader
  19  */
  20
  21 #ifndef __GNOMEFONTINSTANCE_H
  22 #define __GNOMEFONTINSTANCE_H
  23
  24 #include <gnome.h>
  25 #include <ft2build.h>
  26 #include FT_FREETYPE_H
  27 #include FT_GLYPH_H
  28 #include <cairo.h>
  29
  30 #include "layout/LETypes.h"
  31 #include "layout/LEFontInstance.h"
  32
  33 #include "RenderingSurface.h"
  34 #include "FontTableCache.h"
  35 #include "cmaps.h"
  36
  37 class GnomeSurface : public RenderingSurface
  38 {
  39 public:
  40     GnomeSurface(GtkWidget *theWidget);
  41     virtual ~GnomeSurface();
  42
  43     virtual void drawGlyphs(const LEFontInstance *font, const LEGlyphID *glyphs, le_int32 count,
  44         const float *positions, le_int32 x, le_int32 y, le_int32 width, le_int32 height);
  45
  46     GtkWidget *getWidget() const;
  47     void setWidget(GtkWidget *theWidget);
  48
  49 private:
  50     GtkWidget *fWidget;
  51     cairo_t   *fCairo;
  52 };
  53
  54 class GnomeFontInstance : public LEFontInstance, protected FontTableCache
  55 {
  56  protected:
  57     FT_Face fFace;
  58 //  FT_Glyph fGlyph;
  59
  60     cairo_font_face_t *fCairoFace;
  61
  62     le_int32 fPointSize;
  63     le_int32 fUnitsPerEM;
  64     le_int32 fAscent;
  65     le_int32 fDescent;
  66     le_int32 fLeading;
  67
  68     float fDeviceScaleX;
  69     float fDeviceScaleY;
  70
  71     CMAPMapper *fMapper;
  72
  73     virtual const void *readFontTable(LETag tableTag) const;
  74
  75     virtual LEErrorCode initMapper();
  76
  77  public:
  78     GnomeFontInstance(FT_Library engine, const char *fontPathName, le_int16 pointSize, LEErrorCode &status);
  79
  80     virtual ~GnomeFontInstance();
  81
  82     virtual const void *getFontTable(LETag tableTag) const;
  83
  84     virtual le_int32 getUnitsPerEM() const;
  85
  86     virtual le_int32 getAscent() const;
  87
  88     virtual le_int32 getDescent() const;
  89
  90     virtual le_int32 getLeading() const;
  91
  92     virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const;
  93
  94     virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;
  95
  96     virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;
  97
  98     float getXPixelsPerEm() const;
  99
 100     float getYPixelsPerEm() const;
 101
 102     float getScaleFactorX() const;
 103
 104     float getScaleFactorY() const;
 105
 106     void rasterizeGlyphs(cairo_t *cairo, const LEGlyphID *glyphs, le_int32 glyphCount, const float *positions,
 107                                    le_int32 x, le_int32 y) const;
 108 };
 109
 110 inline GtkWidget *GnomeSurface::getWidget() const
 111 {
 112     return fWidget;
 113 }
 114
 115 inline void GnomeSurface::setWidget(GtkWidget *theWidget)
 116 {
 117     fWidget = theWidget;
 118 }
 119
 120 /*
 121 inline FT_Instance GnomeFontInstance::getFont() const
 122 {
 123     return fInstance;
 124 }
 125 */
 126
 127 inline le_int32 GnomeFontInstance::getUnitsPerEM() const
 128 {
 129     return fUnitsPerEM;
 130 }
 131
 132 inline le_int32 GnomeFontInstance::getAscent() const
 133 {
 134     return fAscent;
 135 }
 136
 137 inline le_int32 GnomeFontInstance::getDescent() const
 138 {
 139     return fDescent;
 140 }
 141
 142 inline le_int32 GnomeFontInstance::getLeading() const
 143 {
 144     return fLeading;
 145 }
 146
 147 inline LEGlyphID GnomeFontInstance::mapCharToGlyph(LEUnicode32 ch) const
 148 {
 149     return fMapper->unicodeToGlyph(ch);
 150 }
 151
 152 inline float GnomeFontInstance::getXPixelsPerEm() const
 153 {
 154     return (float) fPointSize;
 155 }
 156
 157 inline float GnomeFontInstance::getYPixelsPerEm() const
 158 {
 159     return  (float) fPointSize;
 160 }
 161
 162 inline float GnomeFontInstance::getScaleFactorX() const
 163 {
 164     return fDeviceScaleX;
 165 }
 166
 167 inline float GnomeFontInstance::getScaleFactorY() const
 168 {
 169     return fDeviceScaleY;
 170 }
 171
 172 #endif