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 QFONTENGINEDIRECTWRITE_H 43 #define QFONTENGINEDIRECTWRITE_H 44 45 #ifndef QT_NO_DIRECTWRITE 46 47 // 48 // W A R N I N G 49 // ------------- 50 // 51 // This file is not part of the Qt API. It exists purely as an 52 // implementation detail. This header file may change from version to 53 // version without notice, or even be removed. 54 // 55 // We mean it. 56 // 57 58 #include "private/qfontengine_p.h" 59 60 struct IDWriteFont ; 61 struct IDWriteFontFace ; 62 struct IDWriteFactory ; 63 struct IDWriteBitmapRenderTarget ; 64 struct IDWriteGdiInterop ; 65 66 QT_BEGIN_NAMESPACE 67 68 class QFontEngineDirectWrite : public QFontEngine 69 { 70 Q_OBJECT 71 public: 72 explicit QFontEngineDirectWrite(IDWriteFactory *directWriteFactory, 73 IDWriteFontFace *directWriteFontFace, 74 qreal pixelSize); 75 ~QFontEngineDirectWrite(); 76 77 QFixed lineThickness() const; 78 bool getSfntTableData(uint tag, uchar *buffer, uint *length) const; 79 QFixed emSquareSize() const; 80 81 bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const; 82 void recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags) const; 83 84 void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nglyphs, 85 QPainterPath *path, QTextItem::RenderFlags flags); 86 87 glyph_metrics_t boundingBox(const QGlyphLayout &glyphs); 88 glyph_metrics_t boundingBox(glyph_t g); 89 glyph_metrics_t alphaMapBoundingBox(glyph_t glyph, 90 QFixed subPixelPosition, 91 const QTransform &matrix, 92 GlyphFormat format); 93 94 QFixed ascent() const; 95 QFixed descent() const; 96 QFixed leading() const; 97 QFixed xHeight() const; 98 qreal maxCharWidth() const; 99 100 const char *name() const; 101 102 bool supportsSubPixelPositions() const; 103 104 QImage alphaMapForGlyph(glyph_t, QFixed subPixelPosition, const QTransform &t); 105 QImage alphaRGBMapForGlyph(glyph_t t, QFixed subPixelPosition, int margin, 106 const QTransform &xform); 107 108 QFontEngine *cloneWithSize(qreal pixelSize) const; 109 110 bool canRender(const QChar *string, int len); 111 Type type() const; 112 113 private: 114 friend class QRawFontPrivate; 115 116 QImage imageForGlyph(glyph_t t, QFixed subPixelPosition, int margin, const QTransform &xform); 117 void collectMetrics(); 118 119 IDWriteFontFace *m_directWriteFontFace; 120 IDWriteFactory *m_directWriteFactory; 121 IDWriteBitmapRenderTarget *m_directWriteBitmapRenderTarget; 122 123 QFixed m_lineThickness; 124 int m_unitsPerEm; 125 QFixed m_ascent; 126 QFixed m_descent; 127 QFixed m_xHeight; 128 QFixed m_lineGap; 129 FaceId m_faceId; 130 }; 131 132 QT_END_NAMESPACE 133 134 #endif // QT_NO_DIRECTWRITE 135 136 #endif // QFONTENGINEDIRECTWRITE_H 137