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39
40#ifndef QGLPAINTDEVICE_P_H
41#define QGLPAINTDEVICE_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists for the convenience
48// of the Qt OpenGL module. This header file may change from
49// version to version without notice, or even be removed.
50//
51// We mean it.
52//
53
54
55#include <qpaintdevice.h>
56#include <QtOpenGL/qgl.h>
57
58
59QT_BEGIN_NAMESPACE
60
61class Q_OPENGL_EXPORT QGLPaintDevice : public QPaintDevice
62{
63public:
64 QGLPaintDevice();
65 virtual ~QGLPaintDevice();
66
67 int devType() const override {return QInternal::OpenGL;}
68
69 virtual void beginPaint();
70 virtual void ensureActiveTarget();
71 virtual void endPaint();
72
73 virtual QGLContext* context() const = 0;
74 virtual QGLFormat format() const;
75 virtual QSize size() const = 0;
76 virtual bool alphaRequested() const;
77 virtual bool isFlipped() const;
78
79 // returns the QGLPaintDevice for the given QPaintDevice
80 static QGLPaintDevice* getDevice(QPaintDevice*);
81
82protected:
83 int metric(QPaintDevice::PaintDeviceMetric metric) const override;
84 GLuint m_previousFBO;
85 GLuint m_thisFBO;
86};
87
88
89// Wraps a QGLWidget
90class QGLWidget;
91class Q_OPENGL_EXPORT QGLWidgetGLPaintDevice : public QGLPaintDevice
92{
93public:
94 QGLWidgetGLPaintDevice();
95
96 virtual QPaintEngine* paintEngine() const override;
97
98 // QGLWidgets need to do swapBufers in endPaint:
99 virtual void beginPaint() override;
100 virtual void endPaint() override;
101 virtual QSize size() const override;
102 virtual QGLContext* context() const override;
103
104 void setWidget(QGLWidget*);
105
106private:
107 friend class QGLWidget;
108 QGLWidget *glWidget;
109};
110
111QT_END_NAMESPACE
112
113#endif // QGLPAINTDEVICE_P_H
114