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Diffstat (limited to 'src/gui/text/qabstractfontengine_qws.h')
| -rw-r--r-- | src/gui/text/qabstractfontengine_qws.h | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/src/gui/text/qabstractfontengine_qws.h b/src/gui/text/qabstractfontengine_qws.h new file mode 100644 index 0000000000..dfc15dcf5d --- /dev/null +++ b/src/gui/text/qabstractfontengine_qws.h @@ -0,0 +1,221 @@ +/**************************************************************************** +** +** Copyright (C) 2011 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 |