From 2ab4245c866bcefb755a33f7eaa6ef1277f82df1 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sat, 13 Jun 2009 21:33:09 +0100
Subject: [PATCH] [test] Need SOURCE when copying image data

As cairo-test-trace does not clear the image data before reuse, using
the default OVER operator will cause differing results for each process
when inadvertently alpha blending into the shared memory region. As we
essentially want to just copy the source pixels, be explicit and set the
SOURCE operator.
---
 test/cairo-test-trace.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/test/cairo-test-trace.c b/test/cairo-test-trace.c
index d42ff3d4b..6d0bab850 100644
--- a/test/cairo-test-trace.c
+++ b/test/cairo-test-trace.c
@@ -282,6 +282,7 @@ push_surface (test_runner_thread_t *thread,
     cr = cairo_create (image);
     cairo_surface_destroy (image);
 
+    cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
     cairo_set_source_surface (cr, source, 0, 0);
     cairo_paint (cr);
     cairo_destroy (cr);