** Changed in: compiz
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1257223
Title:
Negative plugin causes incorrect alpha blending ( a(1+x)+bx instead of
a(1-x)+bx )
Status in Compiz:
Fix Released
Status in “compiz” package in Ubuntu:
Fix Released
Bug description:
When the opacity of a negative window (that is, one for which negative
plugin is activated) is reduced, it causes the compositor to blend it
incorrectly: instead of the usual blending function of a(1-x)+bx (here
x is alpha), a(1+x)+bx is used. This causes the window area to become
almost completely white in certain cases.
Compiz version: rev. 3806.
I think I could fix this bug myself, but I'm not familiar with the
compiz codebase enough. Maybe someone could hint me where the actual
compositing is implemented? This would save a lot of time for me.
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