MWsBackBuffer Class Reference
| class MWsBackBuffer : public MWsObjectProvider |
Wserv flickerfree buffer access
Member Functions Documentation
GetBitGc()
Get default wserv flickerfree buffer drawing context. This will always return the original context not the current context (e.g. not the redirecting context when it is redirected).
GetBitGcCurrent()
Get current wserv flickerfree buffer drawing context. This will return the redirected context when it is set.
GetBitmap()
Get wserv flickerfree buffer bitmap
Observer()
This returns the observer set by SetObserver.
RedirectTo(MWsBackBuffer *)
Redirects drawing to another back buffer. Target back buffer must provide bitmap and drawing context which has been activated on a bitmap device.
Parameters
| MWsBackBuffer * aTarget | Target back buffer where drawing is redirected to. If it is NULL the redirection will be terminated. |
SetBitGc(CFbsBitGc *)
Set wserv flickerfree buffer drawing context to redirect its drawing output. Drawing context must have been activated on a device prior calling this function.
Parameters
| CFbsBitGc * aBitGc | The context where flickerfree buffer drawing output is redirected to. If it is NULL the redirection will be cancelled and default drawing context will be restored. |
SetObserver(MWsFlickerFreeBufferObserver *)
Sets the back buffers observer. The observer will be called just before and just after each complete sequence of drawing to the back buffer.
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