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/****************************************************************************
**
** Copyright (C) 2009 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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.
**
** 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
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