From 8e7589abcc4075d4a1de9151e79fda5d093d03bb Mon Sep 17 00:00:00 2001 From: Taekyun Kim Date: Wed, 15 Jun 2011 23:23:02 +0900 Subject: [PATCH] tessellator: Fixed to produce an output box with x1 <= x2 for single box input Winding of a box is toggled by swapping x1, x2 coordinates. So we have to swap those coordinate rather than just copying. Many routines assume that boxes are left-top to right-bottom convention. So tessellator should produce such output boxes. Signed-off-by: Chris Wilson --- src/cairo-bentley-ottmann-rectangular.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/src/cairo-bentley-ottmann-rectangular.c b/src/cairo-bentley-ottmann-rectangular.c index 88986bb56..9a4dcd9f3 100644 --- a/src/cairo-bentley-ottmann-rectangular.c +++ b/src/cairo-bentley-ottmann-rectangular.c @@ -739,6 +739,13 @@ _cairo_bentley_ottmann_tessellate_boxes (const cairo_boxes_t *in, if (unlikely (in->num_boxes == 1)) { cairo_box_t box = in->chunks.base[0]; _cairo_boxes_clear (out); + + if (box.p1.x > box.p2.x) { + cairo_fixed_t tmp = box.p1.x; + box.p1.x = box.p2.x; + box.p2.x = tmp; + } + status = _cairo_boxes_add (out, &box); assert (status == CAIRO_STATUS_SUCCESS); return CAIRO_STATUS_SUCCESS;