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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#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>
#include <dwrite.h>
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;
Properties properties() const override;
void getUnscaledGlyph(glyph_t glyph, QPainterPath *path, glyph_metrics_t *metrics) 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,
DWRITE_RENDERING_MODE renderMode);
static QString filenameFromFontFile(IDWriteFontFile *fontFile);
DWRITE_RENDERING_MODE hintingPreferenceToRenderingMode(const QFontDef &fontDef) const;
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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