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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QWINDOWSFONTENGINEDIRECTWRITE_H
#define QWINDOWSFONTENGINEDIRECTWRITE_H
#include <QtCore/qglobal.h>
#ifndef QT_NO_DIRECTWRITE
#include <QtGui/private/qfontengine_p.h>
#include <QtCore/QSharedPointer>
struct IDWriteFont;
struct IDWriteFontFace;
struct IDWriteFactory;
struct IDWriteBitmapRenderTarget;
struct IDWriteGdiInterop;
QT_BEGIN_NAMESPACE
class QWindowsFontEngineData;
class QWindowsFontEngineDirectWrite : public QFontEngine
{
public:
explicit QWindowsFontEngineDirectWrite(IDWriteFontFace *directWriteFontFace,
qreal pixelSize,
const QSharedPointer<QWindowsFontEngineData> &d);
~QWindowsFontEngineDirectWrite();
void initFontInfo(const QFontDef &request, int dpi, IDWriteFont *font);
QFixed lineThickness() const;
QFixed underlinePosition() const;
bool getSfntTableData(uint tag, uchar *buffer, uint *length) const;
QFixed emSquareSize() const;
glyph_t glyphIndex(uint ucs4) const Q_DECL_OVERRIDE;
bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, ShaperFlags flags) const;
void recalcAdvances(QGlyphLayout *glyphs, ShaperFlags) const;
void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nglyphs,
QPainterPath *path, QTextItem::RenderFlags flags);
glyph_metrics_t boundingBox(const QGlyphLayout &glyphs);
glyph_metrics_t boundingBox(glyph_t g);
glyph_metrics_t alphaMapBoundingBox(glyph_t glyph, QFixed, const QTransform &matrix, GlyphFormat);
QFixed ascent() const;
QFixed descent() const;
QFixed leading() const;
QFixed xHeight() const;
qreal maxCharWidth() const;
bool supportsSubPixelPositions() const;
QImage alphaMapForGlyph(glyph_t glyph, QFixed subPixelPosition);
QImage alphaRGBMapForGlyph(glyph_t t, QFixed subPixelPosition, const QTransform &xform);
QFontEngine *cloneWithSize(qreal pixelSize) const;
const QSharedPointer<QWindowsFontEngineData> &fontEngineData() const { return m_fontEngineData; }
static QString fontNameSubstitute(const QString &familyName);
IDWriteFontFace *directWriteFontFace() const { return m_directWriteFontFace; }
private:
QImage imageForGlyph(glyph_t t, QFixed subPixelPosition, int margin, const QTransform &xform);
void collectMetrics();
const QSharedPointer<QWindowsFontEngineData> m_fontEngineData;
IDWriteFontFace *m_directWriteFontFace;
IDWriteBitmapRenderTarget *m_directWriteBitmapRenderTarget;
QFixed m_lineThickness;
QFixed m_underlinePosition;
int m_unitsPerEm;
QFixed m_ascent;
QFixed m_descent;
QFixed m_xHeight;
QFixed m_lineGap;
FaceId m_faceId;
};
QT_END_NAMESPACE
#endif // QT_NO_DIRECTWRITE
#endif // QWINDOWSFONTENGINEDIRECTWRITE_H
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