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cliptest: Avoid use of uninitialized memory when regions don't intersect

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Prevent attempting to draw the intersection polygon when it contains no
vertices.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
This commit is contained in:
Derek Foreman 2014-08-18 16:13:41 -05:00 committed by Pekka Paalanen
parent 0fc3786dff
commit a0fae4657f
1 changed files with 7 additions and 5 deletions
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12
clients/cliptest.c
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@ -570,12 +570,14 @@ draw_geometry(cairo_t *cr, struct weston_surface *surface,
cairo_set_source_rgba(cr, 0.0, 0.0, 1.0, 0.4);
cairo_fill(cr);
draw_polygon_closed(cr, ex, ey, n);
cairo_set_source_rgb(cr, 0.0, 1.0, 0.0);
cairo_stroke(cr);
if (n) {
draw_polygon_closed(cr, ex, ey, n);
cairo_set_source_rgb(cr, 0.0, 1.0, 0.0);
cairo_stroke(cr);
cairo_set_source_rgba(cr, 0.0, 1.0, 0.0, 0.5);
draw_polygon_labels(cr, ex, ey, n);
cairo_set_source_rgba(cr, 0.0, 1.0, 0.0, 0.5);
draw_polygon_labels(cr, ex, ey, n);
}
}
static void