1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2015 The Qt Company Ltd. 4 ** Contact: http://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtGui module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see http://www.qt.io/terms-conditions. For further 15 ** information use the contact form at http://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 2.1 or version 3 as published by the Free 20 ** Software Foundation and appearing in the file LICENSE.LGPLv21 and 21 ** LICENSE.LGPLv3 included in the packaging of this file. Please review the 22 ** following information to ensure the GNU Lesser General Public License 23 ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and 24 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. 25 ** 26 ** As a special exception, The Qt Company gives you certain additional 27 ** rights. These rights are described in The Qt Company LGPL Exception 28 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. 29 ** 30 ** GNU General Public License Usage 31 ** Alternatively, this file may be used under the terms of the GNU 32 ** General Public License version 3.0 as published by the Free Software 33 ** Foundation and appearing in the file LICENSE.GPL included in the 34 ** packaging of this file. Please review the following information to 35 ** ensure the GNU General Public License version 3.0 requirements will be 36 ** met: http://www.gnu.org/copyleft/gpl.html. 37 ** 38 ** $QT_END_LICENSE$ 39 ** 40 ****************************************************************************/ 41 42 #ifndef QABSTRACTFONTENGINE_P_H 43 #define QABSTRACTFONTENGINE_P_H 44 45 // 46 // W A R N I N G 47 // ------------- 48 // 49 // This file is not part of the Qt API. It exists purely as an 50 // implementation detail. This header file may change from version to 51 // version without notice, or even be removed. 52 // 53 // We mean it. 54 // 55 56 #include "qfontengine_p.h" 57 #include "qabstractfontengine_qws.h" 58 59 QT_BEGIN_NAMESPACE 60 61 class QCustomFontEngine; 62 63 class QProxyFontEngine : public QFontEngine 64 { 65 Q_OBJECT 66 public: 67 QProxyFontEngine(QAbstractFontEngine *engine, const QFontDef &def); 68 virtual ~QProxyFontEngine(); 69 70 virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const; 71 virtual void recalcAdvances(QGlyphLayout *, QTextEngine::ShaperFlags) const; 72 virtual QImage alphaMapForGlyph(glyph_t); 73 virtual void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nglyphs, QPainterPath *path, QTextItem::RenderFlags flags); 74 virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs); 75 virtual glyph_metrics_t boundingBox(glyph_t glyph); 76 77 virtual QFixed ascent() const; 78 virtual QFixed descent() const; 79 virtual QFixed leading() const; 80 virtual QFixed xHeight() const; 81 virtual QFixed averageCharWidth() const; 82 virtual QFixed lineThickness() const; 83 virtual QFixed underlinePosition() const; 84 virtual qreal maxCharWidth() const; 85 virtual qreal minLeftBearing() const; 86 virtual qreal minRightBearing() const; 87 virtual int glyphCount() const; 88 89 virtual bool canRender(const QChar *string, int len); 90 type()91 virtual Type type() const { return Proxy; } name()92 virtual const char *name() const { return "proxy engine"; } 93 94 #if !defined(Q_WS_X11) && !defined(Q_WS_WIN) && !defined(Q_WS_MAC) && !defined(Q_OS_SYMBIAN) 95 virtual void draw(QPaintEngine *, qreal, qreal, const QTextItemInt &); 96 #endif 97 capabilities()98 inline QAbstractFontEngine::Capabilities capabilities() const 99 { return engineCapabilities; } 100 101 bool drawAsOutline() const; 102 103 private: 104 QAbstractFontEngine *engine; 105 QAbstractFontEngine::Capabilities engineCapabilities; 106 }; 107 108 QT_END_NAMESPACE 109 110 #endif 111