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glamor: don't do copy if we have 0 boxes to copy. 

This happens if you run twm + mplayer + xclock and drag
the clock over the mplayer. If we don't catch it, we cause
an illegal draw elements command to be passed to GL.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Dave Airlie 2016-01-19 02:01:09 +00:00 committed by Eric Anholt
parent e7308b6c77
commit 1fd82c764d
1 changed files with 3 additions and 0 deletions
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3
glamor/glamor_copy.c
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@ -640,6 +640,9 @@ glamor_copy(DrawablePtr src,
Pixel bitplane, Pixel bitplane,
void *closure) void *closure)
{ {
if (nbox == 0)
return;
if (glamor_copy_gl(src, dst, gc, box, nbox, dx, dy, reverse, upsidedown, bitplane, closure)) if (glamor_copy_gl(src, dst, gc, box, nbox, dx, dy, reverse, upsidedown, bitplane, closure))
return; return;
glamor_copy_bail(src, dst, gc, box, nbox, dx, dy, reverse, upsidedown, bitplane, closure); glamor_copy_bail(src, dst, gc, box, nbox, dx, dy, reverse, upsidedown, bitplane, closure);