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Re: Detecting global dirty regions/window updates.


On Nov 20, 2007, at 4:00 AM, Teemu Keinonen wrote:

Hi all,

I want to write optimized screenshot utility to make videos from screeen and therefore i want to know what parts of the screen have changed since last snapshot. I can think of two alternatives:

1) Is it possible to get dirty region information from window manager via a callback or such?

No.

2) Is it possible to detect 'update' events sent to/from windows?

Try CGRegisterScreenRefreshCallback in CoreGraphics/CGRemote.h.

-eric

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 >Detecting global dirty regions/window updates. (From: "Teemu Keinonen" <email@hidden>)



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