Re: OpenGL-based framebuffer concepts

[Helge Hafting <helge.hafting@aitel.hist.no>]

Xavier Bestel wrote:
> Don't save the framebuffer. Just send a message to the client
> application saying "fb is corrupted, please redraw". X11 can do it,
> console can do it.
>   
Sure, X has no problem doing an expose event on the entire screen.
But then the kernel would need a way to tell X that the display
was invalidated outside its control.  Is there even an
API for that today?

The problem isn't trivial, for the machine may be running
quite a few xservers.  Or some other sort of software
that uses the framebuffer.  (libsvga, y, berlin, ...)

Helge Hafting
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