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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QFONTENGINEDIRECTWRITE_H
#define QFONTENGINEDIRECTWRITE_H
#ifndef QT_NO_DIRECTWRITE
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "private/qfontengine_p.h"
struct IDWriteFont ;
struct IDWriteFontFace ;
struct IDWriteFactory ;
struct IDWriteBitmapRenderTarget ;
struct IDWriteGdiInterop ;
QT_BEGIN_NAMESPACE
class QFontEngineDirectWrite : public QFontEngine
{
Q_OBJECT
public:
explicit QFontEngineDirectWrite(IDWriteFactory *directWriteFactory,
IDWriteFontFace *directWriteFontFace,
qreal pixelSize);
~QFontEngineDirectWrite();
QFixed lineThickness() const;
bool getSfntTableData(uint tag, uchar *buffer, uint *length) const;
QFixed emSquareSize() const;
bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const;
void recalcAdvances(QGlyphLayout *glyphs, QTextEngine::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 subPixelPosition,
const QTransform &matrix,
GlyphFormat format);
QFixed ascent() const;
QFixed descent() const;
QFixed leading() const;
QFixed xHeight() const;
qreal maxCharWidth() const;
const char *name() const;
bool supportsSubPixelPositions() const;
QImage alphaMapForGlyph(glyph_t, QFixed subPixelPosition, const QTransform &t);
QImage alphaRGBMapForGlyph(glyph_t t, QFixed subPixelPosition, int margin,
const QTransform &xform);
QFontEngine *cloneWithSize(qreal pixelSize) const;
bool canRender(const QChar *string, int len);
Type type() const;
private:
friend class QRawFontPrivate;
QImage imageForGlyph(glyph_t t, QFixed subPixelPosition, int margin, const QTransform &xform);
void collectMetrics();
IDWriteFontFace *m_directWriteFontFace;
IDWriteFactory *m_directWriteFactory;
IDWriteBitmapRenderTarget *m_directWriteBitmapRenderTarget;
QFixed m_lineThickness;
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 // QFONTENGINEDIRECTWRITE_H
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