qsgabstractsoftwarerenderer_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
 
#ifndef QSGABSTRACTSOFTWARERENDERER_H
#define QSGABSTRACTSOFTWARERENDERER_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 <private/qsgrenderer_p.h>
 
#include <QtCore/QHash>
 
QT_BEGIN_NAMESPACE
 
class QSGSimpleRectNode;
 
class QSGSoftwareRenderableNode;
class QSGSoftwareRenderableNodeUpdater;
 
class Q_QUICK_EXPORT QSGAbstractSoftwareRenderer : public QSGRenderer
{
public:
    QSGAbstractSoftwareRenderer(QSGRenderContext *context);
    virtual ~QSGAbstractSoftwareRenderer();
 
    QSGSoftwareRenderableNode *renderableNode(QSGNode *node) const;
    void addNodeMapping(QSGNode *node, QSGSoftwareRenderableNode *renderableNode);
    void appendRenderableNode(QSGSoftwareRenderableNode *node);
 
    void nodeChanged(QSGNode *node, QSGNode::DirtyState state) override;
 
    void markDirty();
 
    void setClearColorEnabled(bool enable);
    bool clearColorEnabled() const;
 
protected:
    QRegion renderNodes(QPainter *painter);
    void buildRenderList();
    QRegion optimizeRenderList();
 
    void setBackgroundColor(const QColor &color);
    void setBackgroundRect(const QRect &rect, qreal devicePixelRatio);
    QColor backgroundColor();
    QRect backgroundRect();
    // only known after calling optimizeRenderList()
    bool isOpaque() const { return m_isOpaque; }
    const QVector<QSGSoftwareRenderableNode*> &renderableNodes() const;
 
private:
    void nodeAdded(QSGNode *node);
    void nodeRemoved(QSGNode *node);
    void nodeGeometryUpdated(QSGNode *node);
    void nodeMaterialUpdated(QSGNode *node);
    void nodeMatrixUpdated(QSGNode *node);
    void nodeOpacityUpdated(QSGNode *node);
 
    QHash<QSGNode*, QSGSoftwareRenderableNode*> m_nodes;
    QVector<QSGSoftwareRenderableNode*> m_renderableNodes;
 
    QSGSimpleRectNode *m_background;
 
    QRegion m_dirtyRegion;
    QRegion m_obscuredRegion;
    qreal m_devicePixelRatio = 1;
    bool m_isOpaque = false;
    bool m_clearColorEnabled = true;
 
    QSGSoftwareRenderableNodeUpdater *m_nodeUpdater;
};
 
QT_END_NAMESPACE
 
#endif // QSGABSTRACTSOFTWARERENDERER_H