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
31class GnomeSurface : public RenderingSurface
32{
33public:
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
43private:
44    GtkWidget *fWidget;
45    cairo_t   *fCairo;
46};
47
48class 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
104inline GtkWidget *GnomeSurface::getWidget() const
105{
106    return fWidget;
107}
108
109inline void GnomeSurface::setWidget(GtkWidget *theWidget)
110{
111    fWidget = theWidget;
112}
113
114/*
115inline FT_Instance GnomeFontInstance::getFont() const
116{
117    return fInstance;
118}
119*/
120
121inline le_int32 GnomeFontInstance::getUnitsPerEM() const
122{
123    return fUnitsPerEM;
124}
125
126inline le_int32 GnomeFontInstance::getAscent() const
127{
128    return fAscent;
129}
130
131inline le_int32 GnomeFontInstance::getDescent() const
132{
133    return fDescent;
134}
135
136inline le_int32 GnomeFontInstance::getLeading() const
137{
138    return fLeading;
139}
140
141inline LEGlyphID GnomeFontInstance::mapCharToGlyph(LEUnicode32 ch) const
142{
143    return fMapper->unicodeToGlyph(ch);
144}
145
146inline float GnomeFontInstance::getXPixelsPerEm() const
147{
148    return (float) fPointSize;
149}
150
151inline float GnomeFontInstance::getYPixelsPerEm() const
152{
153    return  (float) fPointSize;
154}
155
156inline float GnomeFontInstance::getScaleFactorX() const
157{
158    return fDeviceScaleX;
159}
160
161inline float GnomeFontInstance::getScaleFactorY() const
162{
163    return fDeviceScaleY;
164}
165
166#endif
167