[PATCH 12/14] composite: Fix COW creation for Xinerama
Keith Packard
keithp at keithp.com
Mon Dec 2 15:40:45 PST 2013
Adam Jackson <ajax at redhat.com> writes:
> Say you have two 800x600 screens left/right of each other. A window
> that's 200x200 at +700+0 in protocol coordinate space will appear to be
> at -100+0 in the coordinate space of the right hand screen. Put another
> way: windows are in the coordinate space of their root window pixmap.
>
> We weren't doing this translation for the COW, so when rendering came in
> to it you'd see the top-left chunk of the COW on all screens. Cool
> effect and all, but wrong.
You should probably pull the x and y out of the scree only in the
PANORAMIX case, just as w and h are? Seems more consistent to me.
--
keith.packard at intel.com
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