From 66ace8cd33c0ebe88972f0c4d5c0effeacb1cea3 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed, 29 Sep 2010 13:46:02 +0100
Subject: [PATCH] image: The a8 in-place span compositing is only valid for
 SOURCE

Fixes test/a8-clear.

Reported-by: Jeremy Moles <jeremy@emperorlinux.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 src/cairo-image-surface.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/cairo-image-surface.c b/src/cairo-image-surface.c
index 2a1c8186d..491859f74 100644
--- a/src/cairo-image-surface.c
+++ b/src/cairo-image-surface.c
@@ -3447,10 +3447,15 @@ _composite_spans (void                          *closure,
     /* TODO: support rendering to A1 surfaces (or: go add span
      * compositing to pixman.) */
 
-    if (pattern == NULL && dst_format == PIXMAN_a8) {
+    if (pattern == NULL &&
+	dst_format == PIXMAN_a8 &&
+	op == CAIRO_OPERATOR_SOURCE)
+    {
 	mask = dst;
 	dst = NULL;
-    } else {
+    }
+    else
+    {
 	int stride = CAIRO_STRIDE_FOR_WIDTH_BPP (extents->width, 8);
 	uint8_t *data = mask_buf;