qpaintengine_alpha_p.h

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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

// Qt-Security score:significant reason:default

#ifndef QPAINTENGINE_ALPHA_P_H

#define QPAINTENGINE_ALPHA_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists for the convenience

// of other Qt classes.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include <QtPrintSupport/private/qtprintsupportglobal_p.h>

#ifndef QT_NO_PRINTER

#include "private/qpaintengine_p.h"

#include <QtPrintSupport/qtprintsupportglobal.h>

QT_BEGIN_NAMESPACE

class QAlphaPaintEnginePrivate;

class Q_PRINTSUPPORT_EXPORT QAlphaPaintEngine : public QPaintEngine

    Q_DECLARE_PRIVATE(QAlphaPaintEngine)

public:

    ~QAlphaPaintEngine();

    bool begin(QPaintDevice *pdev) override;

    bool end() override;

    void updateState(const QPaintEngineState &state)  override;

    void drawPath(const QPainterPath &path)  override;

    void drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode) override;

    void drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr) override;

    void drawTextItem(const QPointF &p, const QTextItem &textItem) override;

    void drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &s) override;

protected:

    QAlphaPaintEngine(QAlphaPaintEnginePrivate &data, PaintEngineFeatures devcaps = { });

    QRegion alphaClipping() const;

    bool continueCall() const;

    void flushAndInit(bool init = true);

    void cleanUp();

};

class QAlphaPaintEnginePrivate : public QPaintEnginePrivate

    Q_DECLARE_PUBLIC(QAlphaPaintEngine)

public:

    QAlphaPaintEnginePrivate();

    ~QAlphaPaintEnginePrivate();

    int m_pass;

    QPicture *m_pic;

    QPaintEngine *m_picengine;

    QPainter *m_picpainter;

    QPaintEngine::PaintEngineFeatures m_savedcaps;

    QPaintDevice *m_pdev;

    QRegion m_alphargn;

    QRegion m_cliprgn;

    mutable QRegion m_cachedDirtyRgn;

    mutable int m_numberOfCachedRects;

    QList<QRect> m_dirtyRects;

    bool m_hasalpha;

    bool m_alphaPen;

    bool m_alphaBrush;

    bool m_alphaOpacity;

    bool m_advancedPen;

    bool m_advancedBrush;

    bool m_complexTransform;

    bool m_emulateProjectiveTransforms;

    bool m_continueCall;

    QTransform m_transform;

    QPen m_pen;

    void addAlphaRect(const QRectF &rect);

    void addDirtyRect(const QRectF &rect) { m_dirtyRects.append(rect.toAlignedRect()); }

    bool canSeeTroughBackground(bool somethingInRectHasAlpha, const QRectF &rect) const;

    QRectF addPenWidth(const QPainterPath &path);

    void drawAlphaImage(const QRectF &rect);

    QRect toRect(const QRectF &rect) const;

    bool fullyContained(const QRectF &rect) const;

    void resetState(QPainter *p);

};

QT_END_NAMESPACE

#endif // QT_NO_PRINTER

#endif // QPAINTENGINE_ALPHA_P_H