gentoo-overlay/x11-libs/cairo/files/cairo-1.12.16-all-clipped-2.patch

From ed175b2a2bebb6def85133257bc11a875d13b0dd Mon Sep 17 00:00:00 2001
From: Uli Schlachter <psychon@znc.in>
Date: Thu, 06 Mar 2014 08:45:08 +0000
Subject: clip: Fix handling of special all-clipped cairo_clip_t

_cairo_clip_intersect_box() wasn't checking if it was called with the special,
read-only all-clipped clip and thus could have ended up writing to read-only
memory.

References: https://bugs.freedesktop.org/show_bug.cgi?id=75819
Signed-off-by: Uli Schlachter <psychon@znc.in>
---
diff --git a/src/cairo-clip-boxes.c b/src/cairo-clip-boxes.c
index 352654f..7bcbeb1 100644
--- a/src/cairo-clip-boxes.c
+++ b/src/cairo-clip-boxes.c
@@ -258,6 +258,9 @@ _cairo_clip_intersect_box (cairo_clip_t *clip,
 {
     cairo_rectangle_int_t r;
 
+    if (_cairo_clip_is_all_clipped (clip))
+	return clip;
+
     _cairo_box_round_to_rectangle (box, &r);
     if (r.width == 0 || r.height == 0)
 	return _cairo_clip_set_all_clipped (clip);
--
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