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xcb: Work around wrong extent computation in the X server

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This is basically the same fix as e6c3efdd65. However, this was lost in
b132fae5e8 and thus had to be fixed again.

Fixes: clip-fill-eo-unbounded clip-fill-nz-unbounded

Signed-off-by: Uli Schlachter <psychon@znc.in>
This commit is contained in:
Uli Schlachter 2011-07-21 17:15:08 +02:00
parent e2150185fc
commit b60694cbc7
1 changed files with 15 additions and 3 deletions
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18
src/cairo-xcb-surface-render.c
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@ -2913,9 +2913,21 @@ _composite_polygon (cairo_xcb_surface_t *dst,
traps.antialias = antialias;
status = trim_extents_to_traps (extents, &traps.traps);
if (likely (status == CAIRO_STATUS_SUCCESS)) {
status = _clip_and_composite (dst, op, source,
_composite_traps, NULL, &traps,
extents, need_unbounded_clip (extents));
unsigned int flags = 0;
/* For unbounded operations, the X11 server will estimate the
* affected rectangle and apply the operation to that. However,
* there are cases where this is an overestimate (e.g. the
* clip-fill-{eo,nz}-unbounded test).
*
* The clip will trim that overestimate to our expectations.
*/
if (! extents->is_bounded)
flags |= FORCE_CLIP_REGION;
status = _clip_and_composite (dst, op, source, _composite_traps,
NULL, &traps, extents,
need_unbounded_clip (extents) | flags);
}
}