Desktop compositing latency is real

Re:Desktop compositing latency is real by cybermancy on Tuesday November 21, 2017 @11:08AM (#15748801)

This is because fullscreen mode allows the use of something called "DirectDraw Exclusive mode" which bypasses Windows for making calls to the GPU.

https://msdn.microsoft.com/en-us/library/windows/desktop/dd3...

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Re:Desktop compositing latency is real by nulagrithom on Tuesday November 21, 2017 @01:15PM (#15750159)

I wonder if it would be feasible to use this to reduce input lag in an editor?

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Re:Desktop compositing latency is real by kevingadd on Tuesday November 21, 2017 @01:28PM (#15750283)

Yes, but you lose access to any user interface components you don't paint yourself, and you can eat some lag/flickering when switching out of the app as control is returned to the compositor. If you end up needing to show the Open File picker from the OS or pop up the Print dialog you'll need to exit exclusive mode.

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