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39
40#ifndef QT3DRENDER_RENDER_PLATFORMSURFACEFILTER_H
41#define QT3DRENDER_RENDER_PLATFORMSURFACEFILTER_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 other Qt classes. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <private/qt3drender_global_p.h>
55
56#include <QtCore/qobject.h>
57#include <QtGui/qsurface.h>
58#include <QSemaphore>
59
60QT_BEGIN_NAMESPACE
61
62class QOffscreenSurface;
63class QWindow;
64
65namespace Qt3DRender {
66namespace Render {
67
68class AbstractRenderer;
69
70class Q_3DRENDERSHARED_PRIVATE_EXPORT PlatformSurfaceFilter : public QObject
71{
72 Q_OBJECT
73
74public:
75 explicit PlatformSurfaceFilter(QObject *parent = 0);
76 ~PlatformSurfaceFilter();
77
78 bool eventFilter(QObject *obj, QEvent *e) override;
79
80 static void lockSurface();
81 static void releaseSurface();
82 static bool isSurfaceValid(QSurface *surface);
83
84 template<class T>
85 void setSurface(T *surface)
86 {
87 if (m_obj == surface)
88 return;
89
90 if (m_obj)
91 m_obj->removeEventFilter(obj: this);
92
93 // Surface is offset from QWindow/QOffscreenSurface due to multiple inheritance
94 m_surface = static_cast<QSurface *>(surface);
95 m_obj = surface;
96
97 if (m_obj) {
98 m_obj->installEventFilter(filterObj: this);
99 markSurfaceAsValid();
100 }
101 }
102private:
103 QObject *m_obj;
104 QSurface *m_surface;
105
106 static QSemaphore m_surfacesSemaphore;
107 static QHash<QSurface *, bool> m_surfacesValidity;
108 void markSurfaceAsValid();
109};
110
111class Q_3DRENDERSHARED_PRIVATE_EXPORT SurfaceLocker
112{
113public:
114 explicit SurfaceLocker(QSurface *surface);
115 ~SurfaceLocker();
116 bool isSurfaceValid() const;
117
118private:
119 QSurface *m_surface;
120};
121
122} // namespace Render
123} // namespace Qt3DRender
124
125QT_END_NAMESPACE
126
127#endif // QT3DRENDER_RENDER_PLATFORMSURFACEFILTER_H
128

source code of qt3d/src/render/backend/platformsurfacefilter_p.h