1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QABSTRACTFONTENGINE_QWS_H
#define QABSTRACTFONTENGINE_QWS_H
#include <QtCore/qobject.h>
#include <QtCore/qhash.h>
#include <QtCore/qvariant.h>
#include <QtCore/qfactoryinterface.h>
#include <QtGui/qpaintengine.h>
#include <QtGui/qfontdatabase.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
QT_MODULE(Gui)
class QFontEngineInfoPrivate;
class Q_GUI_EXPORT QFontEngineInfo
{
public:
QDOC_PROPERTY(QString family READ family WRITE setFamily)
QDOC_PROPERTY(qreal pixelSize READ pixelSize WRITE setPixelSize)
QDOC_PROPERTY(int weight READ weight WRITE setWeight)
QDOC_PROPERTY(QFont::Style style READ style WRITE setStyle)
QDOC_PROPERTY(QList<QFontDatabase::WritingSystem> writingSystems READ writingSystems WRITE setWritingSystems)
QFontEngineInfo();
explicit QFontEngineInfo(const QString &family);
QFontEngineInfo(const QFontEngineInfo &other);
QFontEngineInfo &operator=(const QFontEngineInfo &other);
~QFontEngineInfo();
void setFamily(const QString &name);
QString family() const;
void setPixelSize(qreal size);
qreal pixelSize() const;
void setWeight(int weight);
int weight() const;
void setStyle(QFont::Style style);
QFont::Style style() const;
QList<QFontDatabase::WritingSystem> writingSystems() const;
void setWritingSystems(const QList<QFontDatabase::WritingSystem> &writingSystems);
private:
QFontEngineInfoPrivate *d;
};
class QAbstractFontEngine;
struct Q_GUI_EXPORT QFontEngineFactoryInterface : public QFactoryInterface
{
virtual QAbstractFontEngine *create(const QFontEngineInfo &info) = 0;
virtual QList<QFontEngineInfo> availableFontEngines() const = 0;
};
#define QFontEngineFactoryInterface_iid "com.trolltech.Qt.QFontEngineFactoryInterface"
Q_DECLARE_INTERFACE(QFontEngineFactoryInterface, QFontEngineFactoryInterface_iid)
class QFontEnginePluginPrivate;
class Q_GUI_EXPORT QFontEnginePlugin : public QObject, public QFontEngineFactoryInterface
{
Q_OBJECT
Q_INTERFACES(QFontEngineFactoryInterface:QFactoryInterface)
public:
QFontEnginePlugin(const QString &foundry, QObject *parent = 0);
~QFontEnginePlugin();
virtual QStringList keys() const;
virtual QAbstractFontEngine *create(const QFontEngineInfo &info) = 0;
virtual QList<QFontEngineInfo> availableFontEngines() const = 0;
private:
Q_DECLARE_PRIVATE(QFontEnginePlugin)
Q_DISABLE_COPY(QFontEnginePlugin)
};
class QAbstractFontEnginePrivate;
class Q_GUI_EXPORT QAbstractFontEngine : public QObject
{
Q_OBJECT
public:
enum Capability {
CanOutlineGlyphs = 1,
CanRenderGlyphs_Mono = 2,
CanRenderGlyphs_Gray = 4,
CanRenderGlyphs = CanRenderGlyphs_Mono | CanRenderGlyphs_Gray
};
Q_DECLARE_FLAGS(Capabilities, Capability)
explicit QAbstractFontEngine(QObject *parent = 0);
~QAbstractFontEngine();
typedef int Fixed; // 26.6
struct FixedPoint
{
Fixed x;
Fixed y;
};
struct GlyphMetrics
{
inline GlyphMetrics()
: x(0), y(0), width(0), height(0),
advance(0) {}
Fixed x;
Fixed y;
Fixed width;
Fixed height;
Fixed advance;
};
enum FontProperty {
Ascent,
Descent,
Leading,
XHeight,
AverageCharWidth,
LineThickness,
UnderlinePosition,
MaxCharWidth,
MinLeftBearing,
MinRightBearing,
GlyphCount,
// hints
CacheGlyphsHint,
OutlineGlyphsHint
};
// keep in sync with QTextEngine::ShaperFlag!!
enum TextShapingFlag {
RightToLeft = 0x0001,
ReturnDesignMetrics = 0x0002
};
Q_DECLARE_FLAGS(TextShapingFlags, TextShapingFlag)
virtual Capabilities capabilities() const = 0;
virtual QVariant fontProperty(FontProperty property) const = 0;
virtual bool convertStringToGlyphIndices(const QChar *string, int length, uint *glyphs, int *numGlyphs, TextShapingFlags flags) const = 0;
virtual void getGlyphAdvances(const uint *glyphs, int numGlyphs, Fixed *advances, TextShapingFlags flags) const = 0;
virtual GlyphMetrics glyphMetrics(uint glyph) const = 0;
virtual bool renderGlyph(uint glyph, int depth, int bytesPerLine, int height, uchar *buffer);
virtual void addGlyphOutlinesToPath(uint *glyphs, int numGlyphs, FixedPoint *positions, QPainterPath *path);
/*
enum Extension {
GetTrueTypeTable
};
virtual bool supportsExtension(Extension extension) const;
virtual QVariant extension(Extension extension, const QVariant &argument = QVariant());
*/
private:
Q_DECLARE_PRIVATE(QAbstractFontEngine)
Q_DISABLE_COPY(QAbstractFontEngine)
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QAbstractFontEngine::Capabilities)
Q_DECLARE_OPERATORS_FOR_FLAGS(QAbstractFontEngine::TextShapingFlags)
QT_END_NAMESPACE
QT_END_HEADER
#endif
|
