1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://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 https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://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 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QWINDOWSFONTENGINEDIRECTWRITE_H 41 #define QWINDOWSFONTENGINEDIRECTWRITE_H 42 43 // 44 // W A R N I N G 45 // ------------- 46 // 47 // This file is not part of the Qt API. It exists purely as an 48 // implementation detail. This header file may change from version to 49 // version without notice, or even be removed. 50 // 51 // We mean it. 52 // 53 54 #include <QtCore/qglobal.h> 55 56 #ifndef QT_NO_DIRECTWRITE 57 58 #include <QtGui/private/qfontengine_p.h> 59 #include <QtCore/QSharedPointer> 60 61 struct IDWriteFont; 62 struct IDWriteFontFace; 63 struct IDWriteFontFile; 64 struct IDWriteFactory; 65 struct IDWriteBitmapRenderTarget; 66 struct IDWriteGdiInterop; 67 struct IDWriteGlyphRunAnalysis; 68 69 QT_BEGIN_NAMESPACE 70 71 class QWindowsFontEngineData; 72 73 class QWindowsFontEngineDirectWrite : public QFontEngine 74 { 75 Q_DISABLE_COPY_MOVE(QWindowsFontEngineDirectWrite) 76 public: 77 explicit QWindowsFontEngineDirectWrite(IDWriteFontFace *directWriteFontFace, 78 qreal pixelSize, 79 const QSharedPointer<QWindowsFontEngineData> &d); 80 ~QWindowsFontEngineDirectWrite() override; 81 82 void initFontInfo(const QFontDef &request, int dpi); 83 84 QFixed lineThickness() const override; 85 QFixed underlinePosition() const override; 86 bool getSfntTableData(uint tag, uchar *buffer, uint *length) const override; 87 QFixed emSquareSize() const override; 88 89 glyph_t glyphIndex(uint ucs4) const override; 90 bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, 91 ShaperFlags flags) const override; 92 void recalcAdvances(QGlyphLayout *glyphs, ShaperFlags) const override; 93 94 void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nglyphs, 95 QPainterPath *path, QTextItem::RenderFlags flags) override; 96 97 glyph_metrics_t boundingBox(const QGlyphLayout &glyphs) override; 98 glyph_metrics_t boundingBox(glyph_t g) override; 99 glyph_metrics_t alphaMapBoundingBox(glyph_t glyph, QFixed, 100 const QTransform &matrix, GlyphFormat) override; 101 102 QFixed ascent() const override; 103 QFixed capHeight() const override; 104 QFixed descent() const override; 105 QFixed leading() const override; 106 QFixed xHeight() const override; 107 qreal maxCharWidth() const override; 108 FaceId faceId() const override; 109 110 bool supportsSubPixelPositions() const override; 111 112 QImage alphaMapForGlyph(glyph_t glyph, QFixed subPixelPosition) override; 113 QImage alphaMapForGlyph(glyph_t glyph, QFixed subPixelPosition, const QTransform &t) override; 114 QImage alphaRGBMapForGlyph(glyph_t t, QFixed subPixelPosition, const QTransform &xform) override; 115 QImage bitmapForGlyph(glyph_t, QFixed subPixelPosition, const QTransform &t, const QColor &color) override; 116 117 QFontEngine *cloneWithSize(qreal pixelSize) const override; 118 Qt::HANDLE handle() const override; 119 fontEngineData()120 const QSharedPointer<QWindowsFontEngineData> &fontEngineData() const { return m_fontEngineData; } 121 122 static QString fontNameSubstitute(const QString &familyName); 123 directWriteFontFace()124 IDWriteFontFace *directWriteFontFace() const { return m_directWriteFontFace; } 125 setUniqueFamilyName(const QString & newName)126 void setUniqueFamilyName(const QString &newName) { m_uniqueFamilyName = newName; } 127 128 private: 129 QImage imageForGlyph(glyph_t t, QFixed subPixelPosition, int margin, const QTransform &xform, const QColor &color = QColor()); 130 void collectMetrics(); 131 void renderGlyphRun(QImage *destination, float r, float g, float b, float a, IDWriteGlyphRunAnalysis *glyphAnalysis, const QRect &boundingRect); 132 static QString filenameFromFontFile(IDWriteFontFile *fontFile); 133 134 const QSharedPointer<QWindowsFontEngineData> m_fontEngineData; 135 136 IDWriteFontFace *m_directWriteFontFace; 137 IDWriteBitmapRenderTarget *m_directWriteBitmapRenderTarget; 138 139 QFixed m_lineThickness; 140 QFixed m_underlinePosition; 141 int m_unitsPerEm; 142 QFixed m_ascent; 143 QFixed m_capHeight; 144 QFixed m_descent; 145 QFixed m_xHeight; 146 QFixed m_lineGap; 147 QFixed m_maxAdvanceWidth; 148 FaceId m_faceId; 149 QString m_uniqueFamilyName; 150 }; 151 152 QT_END_NAMESPACE 153 154 #endif // QT_NO_DIRECTWRITE 155 156 #endif // QWINDOWSFONTENGINEDIRECTWRITE_H 157