qcanvaspainteritemrenderer.h

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// Copyright (C) 2025 The Qt Company Ltd.

// Copyright (C) 2015 QUIt Coding <info@quitcoding.com>

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

// Qt-Security score:significant reason:default

#ifndef QCANVASPAINTERITEMRENDERER_H

#define QCANVASPAINTERITEMRENDERER_H

#include <QtCanvasPainter/qtcanvaspainterglobal.h>

#include <QtQuick/qquickrhiitem.h>

#include <QtGui/qcolor.h>

#include <QtCore/qelapsedtimer.h>

#include <QtCanvasPainter/qcanvaspainter.h>

#include <QtCanvasPainter/qcanvaspainteritem.h>

#include <memory>

QT_BEGIN_NAMESPACE

class QQuickWindow;

class QRhiCommandBuffer;

class QCanvasPainterItemRendererPrivate;

class Q_CANVASPAINTER_EXPORT QCanvasPainterItemRenderer : public QQuickRhiItemRenderer

public:

    QCanvasPainterItemRenderer();

    ~QCanvasPainterItemRenderer() override;

    QColor fillColor() const;

    QCanvasPainter *painter() const;

    qreal width() const;

    qreal height() const;

    bool hasSharedPainter() const;

    void setSharedPainter(bool enable);

protected:

    virtual void initializeResources(QCanvasPainter *painter);

    virtual void prePaint(QCanvasPainter *painter);

    virtual void paint(QCanvasPainter *painter);

    virtual void synchronizeData(QCanvasPainterItem *item);

    void initialize(QRhiCommandBuffer *cb) override;

    void render(QRhiCommandBuffer *cb) override;

    void synchronize(QQuickRhiItem *item) override;

#ifdef Q_QDOC

    template <typename Functor>

    void grabCanvas(const QCanvasOffscreenCanvas &canvas, const QObject *context, Functor &&callback);

#else

    template <typename Functor>

    void grabCanvas(const QCanvasOffscreenCanvas &canvas,

                    const typename QtPrivate::ContextTypeForFunctor<Functor>::ContextType *context,

                    Functor &&callback)

        using Prototype = void (*)(const QImage &);

        QtPrivate::AssertCompatibleFunctions<Prototype, Functor>();

        grabCanvasImpl(canvas, context,

                       QtPrivate::makeCallableObject<Prototype>(std::forward<Functor>(callback)));

#endif

    void beginCanvasPainting(QCanvasOffscreenCanvas &canvas);

    void endCanvasPainting();

private:

    friend class QCanvasPainterItem;

    Q_DECLARE_PRIVATE(QCanvasPainterItemRenderer)

    void grabCanvasImpl(const QCanvasOffscreenCanvas &canvas, const QObject *context,

                        QtPrivate::QSlotObjectBase *slotObj);

    std::unique_ptr<QCanvasPainterItemRendererPrivate> d_ptr;

};

QT_END_NAMESPACE

#endif // QCANVASPAINTERITEMRENDERER_H