// 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 QWINDOWSDIRECT2DPAINTENGINE_H
#define QWINDOWSDIRECT2DPAINTENGINE_H

#include <QtCore/qscopedpointer.h>
#include <QtGui/private/qpaintengineex_p.h>

struct ID2D1Geometry;

QT_BEGIN_NAMESPACE

class QWindowsDirect2DPaintEnginePrivate;
class QWindowsDirect2DBitmap;

class QWindowsDirect2DPaintEngine : public QPaintEngineEx
{
    Q_DECLARE_PRIVATE(QWindowsDirect2DPaintEngine)
    friend class QWindowsDirect2DPaintEngineSuspenderImpl;
    friend class QWindowsDirect2DPaintEngineSuspenderPrivate;
public:
    enum Flag {
        NoFlag = 0,
        TranslucentTopLevelWindow = 1,
        EmulateComposition = 2,
    };
    Q_DECLARE_FLAGS(Flags, Flag)

    QWindowsDirect2DPaintEngine(QWindowsDirect2DBitmap *bitmap, Flags flags);

    bool begin(QPaintDevice *pdev) override;
    bool end() override;

    Type type() const override;

    void setState(QPainterState *s) override;

    void draw(const QVectorPath &path) override;

    void fill(const QVectorPath &path, const QBrush &brush) override;
    void fill(ID2D1Geometry *geometry, const QBrush &brush);

    void stroke(const QVectorPath &path, const QPen &pen) override;
    void stroke(ID2D1Geometry *geometry, const QPen &pen);

    void clip(const QVectorPath &path, Qt::ClipOperation op) override;

    void clipEnabledChanged() override;
    void penChanged() override;
    void brushChanged() override;
    void brushOriginChanged() override;
    void opacityChanged() override;
    void compositionModeChanged() override;
    void renderHintsChanged() override;
    void transformChanged() override;

    void fillRect(const QRectF &rect, const QBrush &brush) override;

    void drawRects(const QRect *rects, int rectCount) override;
    void drawRects(const QRectF *rects, int rectCount) override;

    void drawEllipse(const QRectF &r) override;
    void drawEllipse(const QRect &r) override;

    void drawImage(const QRectF &rectangle, const QImage &image, const QRectF &sr, Qt::ImageConversionFlags flags = Qt::AutoColor) override;
    void drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr) override;

    void drawStaticTextItem(QStaticTextItem *staticTextItem) override;
    void drawTextItem(const QPointF &p, const QTextItem &textItem) override;

private:
    void ensureBrush();
    void ensureBrush(const QBrush &brush);
    void ensurePen();
    void ensurePen(const QPen &pen);

    void rasterFill(const QVectorPath &path, const QBrush &brush);

    enum EmulationType { PenEmulation, BrushEmulation };
    bool emulationRequired(EmulationType type) const;

    bool antiAliasingEnabled() const;
    void adjustForAliasing(QRectF *rect);
    void adjustForAliasing(QPointF *point);

    void suspend();
    void resume();
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QWindowsDirect2DPaintEngine::Flags)

class QWindowsDirect2DPaintEngineSuspenderPrivate;
class QWindowsDirect2DPaintEngineSuspender
{
    Q_DISABLE_COPY_MOVE(QWindowsDirect2DPaintEngineSuspender)
    Q_DECLARE_PRIVATE(QWindowsDirect2DPaintEngineSuspender)
    QScopedPointer<QWindowsDirect2DPaintEngineSuspenderPrivate> d_ptr;
public:
    QWindowsDirect2DPaintEngineSuspender(QWindowsDirect2DPaintEngine *engine);
    ~QWindowsDirect2DPaintEngineSuspender();
    void resume();
};

QT_END_NAMESPACE

#endif // QWINDOWSDIRECT2DPAINTENGINE_H