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composite: Fix COW creation for Xinerama (v2) 

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.

v2: Only translate when Xinerama is active [keithp]

Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Adam Jackson <ajax@redhat.com>
This commit is contained in:
Adam Jackson 2013-11-07 13:59:30 -05:00
parent 8dbe456aba
commit 1dd839a425
1 changed files with 4 additions and 1 deletions
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5
composite/compoverlay.c
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@ -133,16 +133,19 @@ compCreateOverlayWindow(ScreenPtr pScreen)
int result;
int w = pScreen->width;
int h = pScreen->height;
int x = 0, y = 0;
#ifdef PANORAMIX
if (!noPanoramiXExtension) {
x = -pScreen->x;
y = -pScreen->y;
w = PanoramiXPixWidth;
h = PanoramiXPixHeight;
}
#endif
pWin = cs->pOverlayWin =
CreateWindow(cs->overlayWid, pRoot, 0, 0, w, h, 0,
CreateWindow(cs->overlayWid, pRoot, x, y, w, h, 0,
InputOutput, CWBackPixmap | CWOverrideRedirect, &attrs[0],
pRoot->drawable.depth,
serverClient, pScreen->rootVisual, &result);