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Subject DO NOT REPLY [Bug 118905] [From Symphony]White block( on Mac and Black block on Windows) appears if click somewhere else in presentation
Date Mon, 20 Feb 2012 14:54:25 GMT

--- Comment #4 from zhangjf <> 2012-02-20 14:54:25 UTC ---
Below is the analysis of the problem,

Root Cause:
The overlaybuffermanager in svx remember the invalidate range and expand it
with antialiane pixel, but it's use old range to save background. That will
cause that some background was not saved, and refresh to window with
initialized GDI color( Windows is balck and Mac is white).

Remember the offset when the invalidate range would be expand. Use the offset
when save background.

I still need a few time to prepare the code and verify it in new code base when
I have time.

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