/****************************************************************************

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** appearing in the file LICENSE.LGPL included in the packaging of this

** file. Please review the following information to ensure the GNU Lesser

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** Alternatively, this file may be used under the terms of the GNU General

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****************************************************************************/

#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