From 8aa50b5a7873b8317d0593105497607dbb2fae1d Mon Sep 17 00:00:00 2001
From: Benjamin Otte <otte@redhat.com>
Date: Thu, 13 May 2010 10:27:37 +0200
Subject: [PATCH] cairo_paint_with_alpha(cr, 0.0) is only a noop when bounded
 by mask

---
 src/cairo.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/cairo.c b/src/cairo.c
index 0070f983a..7ddfd8442 100644
--- a/src/cairo.c
+++ b/src/cairo.c
@@ -2139,7 +2139,8 @@ cairo_paint_with_alpha (cairo_t *cr,
 	return;
     }
 
-    if (CAIRO_ALPHA_IS_ZERO (alpha)) {
+    if (CAIRO_ALPHA_IS_ZERO (alpha) &&
+        _cairo_operator_bounded_by_mask (cr->gstate->op)) {
 	return;
     }