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#ifndef QMEEGOFENCESYNC_H | |
#define QMEEGOFENCESYNC_H | |
#include <QWidget> | |
class QMeeGoFenceSyncPrivate; | |
//! A synchronization helper for GL pipeline. | |
/*! | |
Fence syncs provide a mechanism for synchronizing access to certain GL primitives | |
and make it possible for the application developer to be sure that a certain point | |
in the GL processing pipeline has been already executed before continuing operation. | |
Currently fence syncs are only useful in conjunction with QMeeGoLivePixmaps. | |
\code | |
... | |
// In your paint/expose event: | |
QImage *image = livePixmap->lock(&someGlobalFenceSync); | |
// Modify the image... | |
livePixmap->release(image); | |
painter->drawPixmap(0, 0, *livePixmap); | |
someGlobalFenceSync.setSyncPoint(); | |
... | |
\endcode | |
Assuming the paint/expose events come repeatedly, the lock operation | |
will block till the previous event completed painting the livePixmap. | |
*/ | |
class Q_DECL_EXPORT QMeeGoFenceSync : public QObject | |
{ | |
public: | |
//! Constructs a new fence sync. | |
/*! | |
The fence sync is created without a sync point. You need to set the sync point manually. | |
*/ | |
QMeeGoFenceSync(QWidget *parent = 0); | |
//! Destructor for the fence sync. | |
virtual ~QMeeGoFenceSync(); | |
//! Sets the fence sync. | |
/*! | |
The fence sync synchronization point should be set after all drawing has been scheduled. | |
Setting a synchronization point always overrides the previous point -- whetver is was | |
used (waited upon) or not. | |
*/ | |
void setSyncPoint(); | |
private: | |
Q_DISABLE_COPY(QMeeGoFenceSync) | |
Q_DECLARE_PRIVATE(QMeeGoFenceSync) | |
protected: | |
QScopedPointer<QMeeGoFenceSyncPrivate> d_ptr; //! Private bits. | |
friend class QMeeGoLivePixmap; | |
}; | |
#endif |