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[trap] Trivial reject if trapezoid is entirely above or below

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Also check whether is vertically within limits.
This commit is contained in:
Chris Wilson 2008-09-24 11:38:21 +01:00
parent 911d5f1a25
commit b9c92842d9
1 changed files with 4 additions and 0 deletions
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4
src/cairo-traps.c
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@ -183,6 +183,10 @@ _cairo_traps_add_trap (cairo_traps_t *traps,
return;
}
/* And reject if the trapezoid is entirely above or below */
if (top > traps->limits.p2.y || bottom < traps->limits.p1.y)
return;
/* Otherwise, clip the trapezoid to the limits. We only clip
* where an edge is entirely outside the limits. If we wanted
* to be more clever, we could handle cases where a trapezoid