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136 lines
4.7 KiB
C++
136 lines
4.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QFONTENGINEDIRECTWRITE_H
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#define QFONTENGINEDIRECTWRITE_H
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#ifndef QT_NO_DIRECTWRITE
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists purely as an
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// implementation detail. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include "qfontengine_p.h"
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struct IDWriteFont ;
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struct IDWriteFontFace ;
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struct IDWriteFactory ;
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struct IDWriteBitmapRenderTarget ;
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struct IDWriteGdiInterop ;
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QT_BEGIN_NAMESPACE
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class QFontEngineDirectWrite : public QFontEngine
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{
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Q_OBJECT
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public:
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explicit QFontEngineDirectWrite(IDWriteFactory *directWriteFactory,
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IDWriteFontFace *directWriteFontFace,
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qreal pixelSize);
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~QFontEngineDirectWrite();
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QFixed lineThickness() const;
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bool getSfntTableData(uint tag, uchar *buffer, uint *length) const;
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QFixed emSquareSize() const;
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bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const;
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void recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags) const;
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void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nglyphs,
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QPainterPath *path, QTextItem::RenderFlags flags);
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glyph_metrics_t boundingBox(const QGlyphLayout &glyphs);
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glyph_metrics_t boundingBox(glyph_t g);
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glyph_metrics_t alphaMapBoundingBox(glyph_t glyph,
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QFixed subPixelPosition,
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const QTransform &matrix,
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GlyphFormat format);
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QFixed ascent() const;
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QFixed descent() const;
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QFixed leading() const;
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QFixed xHeight() const;
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qreal maxCharWidth() const;
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const char *name() const;
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bool supportsSubPixelPositions() const;
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QImage alphaMapForGlyph(glyph_t, QFixed subPixelPosition, const QTransform &t);
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QImage alphaRGBMapForGlyph(glyph_t t, QFixed subPixelPosition, int margin,
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const QTransform &xform);
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QFontEngine *cloneWithSize(qreal pixelSize) const;
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bool canRender(const QChar *string, int len);
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Type type() const;
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private:
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friend class QRawFontPrivate;
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QImage imageForGlyph(glyph_t t, QFixed subPixelPosition, int margin, const QTransform &xform);
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void collectMetrics();
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IDWriteFontFace *m_directWriteFontFace;
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IDWriteFactory *m_directWriteFactory;
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IDWriteBitmapRenderTarget *m_directWriteBitmapRenderTarget;
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QFixed m_lineThickness;
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int m_unitsPerEm;
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QFixed m_ascent;
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QFixed m_descent;
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QFixed m_xHeight;
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QFixed m_lineGap;
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FaceId m_faceId;
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};
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QT_END_NAMESPACE
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#endif // QT_NO_DIRECTWRITE
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#endif // QFONTENGINEDIRECTWRITE_H
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