From 7c6e1b8db89420fa69ebd8d2ba12dde1aeb47ea8 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 29 Jul 2011 12:33:07 +0100
Subject: [PATCH] xcb: Short-circuit multiplying the alpha mask by 1.0

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 src/cairo-xcb-surface-render.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/cairo-xcb-surface-render.c b/src/cairo-xcb-surface-render.c
index 586b9fe88..983061704 100644
--- a/src/cairo-xcb-surface-render.c
+++ b/src/cairo-xcb-surface-render.c
@@ -1666,6 +1666,9 @@ static void blt_in(void *closure,
     xcb_render_color_t color;
     xcb_rectangle_t rect;
 
+    if (coverage == 0xffff)
+	return;
+
     color.red = color.green = color.blue = 0;
     color.alpha = coverage;