qt-everywhere-src-5.15.1/qtdeclarative/examples/quick/scenegraph/rendernode/openglrenderer.h

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#ifndef OPENGLRENDERER_H
#define OPENGLRENDERER_H

#include <qsgrendernode.h>
#include <QQuickItem>

#if QT_CONFIG(opengl)

QT_BEGIN_NAMESPACE

class QOpenGLShaderProgram;
class QOpenGLBuffer;

QT_END_NAMESPACE

//! [1]
class OpenGLRenderNode : public QSGRenderNode
{
public:
    ~OpenGLRenderNode();

    void render(const RenderState *state) override;
    void releaseResources() override;
    StateFlags changedStates() const override;
    RenderingFlags flags() const override;
    QRectF rect() const override;
//! [1]

    void sync(QQuickItem *item);

private:
    void init();

    int m_width = 0;
    int m_height = 0;
    QOpenGLShaderProgram *m_program = nullptr;
    int m_matrixUniform;
    int m_opacityUniform;
    QOpenGLBuffer *m_vbo = nullptr;
};

#endif // opengl

#endif