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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QWINDOWSFONTENGINEDIRECTWRITE_H
#define QWINDOWSFONTENGINEDIRECTWRITE_H
//
// 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 <QtGui/qtguiglobal.h>
#include <QtGui/private/qtgui-config_p.h>
QT_REQUIRE_CONFIG(directwrite);
#include <QtGui/private/qfontengine_p.h>
#include <QtCore/QSharedPointer>
struct IDWriteFont;
struct IDWriteFontFace;
struct IDWriteFontFile;
struct IDWriteFactory;
struct IDWriteBitmapRenderTarget;
struct IDWriteGdiInterop;
struct IDWriteGlyphRunAnalysis;
QT_BEGIN_NAMESPACE
class QWindowsFontEngineData;
class Q_GUI_EXPORT QWindowsFontEngineDirectWrite : public QFontEngine
{
Q_DISABLE_COPY_MOVE(QWindowsFontEngineDirectWrite)
public:
explicit QWindowsFontEngineDirectWrite(IDWriteFontFace *directWriteFontFace,
qreal pixelSize,
const QSharedPointer<QWindowsFontEngineData> &d);
~QWindowsFontEngineDirectWrite() override;
void initFontInfo(const QFontDef &request, int dpi);
QFixed lineThickness() const override;
QFixed underlinePosition() const override;
bool getSfntTableData(uint tag, uchar *buffer, uint *length) const override;
QFixed emSquareSize() const override;
glyph_t glyphIndex(uint ucs4) const override;
bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs,
ShaperFlags flags) const override;
void recalcAdvances(QGlyphLayout *glyphs, ShaperFlags) const override;
void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nglyphs,
QPainterPath *path, QTextItem::RenderFlags flags) override;
glyph_metrics_t boundingBox(const QGlyphLayout &glyphs) override;
glyph_metrics_t boundingBox(glyph_t g) override;
glyph_metrics_t alphaMapBoundingBox(glyph_t glyph, const QFixedPoint&,
const QTransform &matrix, GlyphFormat) override;
QFixed capHeight() const override;
QFixed xHeight() const override;
qreal maxCharWidth() const override;
FaceId faceId() const override;
bool supportsHorizontalSubPixelPositions() const override;
HFONT createHFONT() const;
QImage alphaMapForGlyph(glyph_t glyph, const QFixedPoint &subPixelPosition) override;
QImage alphaMapForGlyph(glyph_t glyph,
const QFixedPoint &subPixelPosition,
const QTransform &t) override;
QImage alphaRGBMapForGlyph(glyph_t t,
const QFixedPoint &subPixelPosition,
const QTransform &xform) override;
QImage bitmapForGlyph(glyph_t,
const QFixedPoint &subPixelPosition,
const QTransform &t,
const QColor &color) override;
QFontEngine *cloneWithSize(qreal pixelSize) const override;
Qt::HANDLE handle() const override;
const QSharedPointer<QWindowsFontEngineData> &fontEngineData() const { return m_fontEngineData; }
static QString fontNameSubstitute(const QString &familyName);
IDWriteFontFace *directWriteFontFace() const { return m_directWriteFontFace; }
void setUniqueFamilyName(const QString &newName) { m_uniqueFamilyName = newName; }
void initializeHeightMetrics() const override;
private:
QImage imageForGlyph(glyph_t t,
const QFixedPoint &subPixelPosition,
int margin,
const QTransform &xform,
const QColor &color = QColor());
void collectMetrics();
void renderGlyphRun(QImage *destination, float r, float g, float b, float a, IDWriteGlyphRunAnalysis *glyphAnalysis, const QRect &boundingRect);
static QString filenameFromFontFile(IDWriteFontFile *fontFile);
const QSharedPointer<QWindowsFontEngineData> m_fontEngineData;
IDWriteFontFace *m_directWriteFontFace;
IDWriteBitmapRenderTarget *m_directWriteBitmapRenderTarget;
QFixed m_lineThickness;
QFixed m_underlinePosition;
int m_unitsPerEm;
QFixed m_capHeight;
QFixed m_xHeight;
QFixed m_maxAdvanceWidth;
FaceId m_faceId;
QString m_uniqueFamilyName;
};
QT_END_NAMESPACE
#endif // QWINDOWSFONTENGINEDIRECTWRITE_H
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