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50
51#include <QWindow>
52
53#include <QColor>
54#include <QMutex>
55#include <QOpenGLShaderProgram>
56#include <QOpenGLBuffer>
57#include <QSharedPointer>
58#include <QTimer>
59
60class HelloWindow;
61
62class Renderer : public QObject
63{
64 Q_OBJECT
65
66public:
67 explicit Renderer(const QSurfaceFormat &format, Renderer *share = 0, QScreen *screen = 0);
68
69 QSurfaceFormat format() const { return m_format; }
70
71 void setAnimating(HelloWindow *window, bool animating);
72
73public slots:
74 void render();
75
76private:
77 void initialize();
78
79 void createGeometry();
80 void createBubbles(int number);
81 void quad(qreal x1, qreal y1, qreal x2, qreal y2, qreal x3, qreal y3, qreal x4, qreal y4);
82 void extrude(qreal x1, qreal y1, qreal x2, qreal y2);
83
84 qreal m_fAngle;
85
86 QVector<QVector3D> vertices;
87 QVector<QVector3D> normals;
88 int vertexAttr;
89 int normalAttr;
90 int matrixUniform;
91 int colorUniform;
92
93 bool m_initialized;
94 QSurfaceFormat m_format;
95 QOpenGLContext *m_context;
96 QOpenGLShaderProgram *m_program;
97 QOpenGLBuffer m_vbo;
98
99 QList<HelloWindow *> m_windows;
100 int m_currentWindow;
101
102 QMutex m_windowLock;
103
104 QColor m_backgroundColor;
105};
106
107class HelloWindow : public QWindow
108{
109public:
110 explicit HelloWindow(const QSharedPointer<Renderer> &renderer, QScreen *screen = 0);
111
112 QColor color() const;
113 void updateColor();
114
115protected:
116 bool event(QEvent *ev) override;
117 void exposeEvent(QExposeEvent *event) override;
118 void mousePressEvent(QMouseEvent *) override;
119
120private:
121 int m_colorIndex;
122 QColor m_color;
123 const QSharedPointer<Renderer> m_renderer;
124 mutable QMutex m_colorLock;
125};
126

source code of qtbase/examples/opengl/hellowindow/hellowindow.h