diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2012-09-27 11:13:23 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2012-09-27 11:13:23 +0100 |
| commit | 7e856071a27b06a6ae35b6445635da9276975c69 (patch) | |
| tree | 858559463b5b7e34ade6a0e91fbebc7a3533b08c | |
| parent | 3969f2c687aa94721e02d50c2f9e1b4d62a546f7 (diff) | |
polygon-intersect: Exclude non-overlapping clip boxes from consideration
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
| -rw-r--r-- | src/cairo-polygon-intersect.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/src/cairo-polygon-intersect.c b/src/cairo-polygon-intersect.c index c900c89d..2cd73d2e 100644 --- a/src/cairo-polygon-intersect.c +++ b/src/cairo-polygon-intersect.c @@ -1394,7 +1394,7 @@ _cairo_polygon_intersect (cairo_polygon_t *a, int winding_a, if (unlikely (0 == a->num_edges)) return CAIRO_STATUS_SUCCESS; - if (unlikely (b->num_edges == 0)) { + if (unlikely (0 == b->num_edges)) { a->num_edges = 0; return CAIRO_STATUS_SUCCESS; } @@ -1505,16 +1505,22 @@ _cairo_polygon_intersect_with_boxes (cairo_polygon_t *polygon, _cairo_polygon_init (&b, NULL, 0); for (n = 0; n < num_boxes; n++) { - cairo_point_t p1, p2; + if (boxes[n].p2.x > polygon->extents.p1.x && + boxes[n].p1.x < polygon->extents.p2.x && + boxes[n].p2.y > polygon->extents.p1.y && + boxes[n].p1.y < polygon->extents.p2.y) + { + cairo_point_t p1, p2; - p1.y = boxes[n].p1.y; - p2.y = boxes[n].p2.y; + p1.y = boxes[n].p1.y; + p2.y = boxes[n].p2.y; - p2.x = p1.x = boxes[n].p1.x; - _cairo_polygon_add_external_edge (&b, &p1, &p2); + p2.x = p1.x = boxes[n].p1.x; + _cairo_polygon_add_external_edge (&b, &p1, &p2); - p2.x = p1.x = boxes[n].p2.x; - _cairo_polygon_add_external_edge (&b, &p2, &p1); + p2.x = p1.x = boxes[n].p2.x; + _cairo_polygon_add_external_edge (&b, &p2, &p1); + } } status = _cairo_polygon_intersect (polygon, *winding, |