qt-everywhere-src-5.14.1/qtbase/examples/opengl/legacy/pbuffers/glwidget.h

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#ifndef GLWIDGET_H
#define GLWIDGET_H

#include <QGLWidget>

class Geometry;
class Cube;
class Tile;
QT_BEGIN_NAMESPACE
class QGLPixelBuffer;
QT_END_NAMESPACE

class GLWidget : public QGLWidget
{
public:
    GLWidget(QWidget *parent = 0);
    ~GLWidget();

protected:
    void initializeGL() override;
    void paintGL() override;
    void resizeGL(int width, int height) override;
    void mousePressEvent(QMouseEvent *) override { setAnimationPaused(true); }
    void mouseReleaseEvent(QMouseEvent *) override { setAnimationPaused(false); }

private:
    void initializeGeometry();
    void initPbuffer();
    void initCommon();
    void perspectiveProjection();
    void orthographicProjection();
    void drawPbuffer();
    void setAnimationPaused(bool enable);

    qreal aspect;
    GLuint dynamicTexture;
    GLuint cubeTexture;
    bool hasDynamicTextureUpdate;
    QGLPixelBuffer *pbuffer;
    Geometry *geom;
    Cube *cube;
    Tile *backdrop;
    QList<Cube *> cubes;
    QList<Tile *> tiles;

};
//! [3]

#endif