[test] Update upscale test to expose an Xlib failure

By filling the background with grey, we can see that Xlib fills areas
with black that it shouldn't. Xlib therefore now fails this test.

5 files changed, 3 insertions, 1 deletions

diff --git a/test/surface-pattern-scale-up.c b/test/surface-pattern-scale-up.c
index 3217f844..26e75c8c 100644
--- a/test/surface-pattern-scale-up.c
+++ b/test/surface-pattern-scale-up.c
@@ -40,7 +40,9 @@ draw (cairo_t *cr, int width, int height)
     cairo_t * cr_surface;
     int surface_size = 6;
 
-    cairo_set_source_rgb (cr, 0, 0, 0);
+    /* Fill the background with grey, so that it's easily visible when
+     * things get overdrawn */
+    cairo_set_source_rgb (cr, 0.5, 0.5, 0.5);
     cairo_paint (cr);
 
     /* Create an image surface with my favorite four colors in each
diff --git a/test/surface-pattern-scale-up.pdf.ref.png b/test/surface-pattern-scale-up.pdf.ref.png
index 97472fa8..593d058a 100644
--- a/test/surface-pattern-scale-up.pdf.ref.png
+++ b/test/surface-pattern-scale-up.pdf.ref.png
diff --git a/test/surface-pattern-scale-up.ps2.ref.png b/test/surface-pattern-scale-up.ps2.ref.png
index 7f672880..f2eac7a7 100644
--- a/test/surface-pattern-scale-up.ps2.ref.png
+++ b/test/surface-pattern-scale-up.ps2.ref.png
diff --git a/test/surface-pattern-scale-up.ps3.ref.png b/test/surface-pattern-scale-up.ps3.ref.png
index 7f672880..f2eac7a7 100644
--- a/test/surface-pattern-scale-up.ps3.ref.png
+++ b/test/surface-pattern-scale-up.ps3.ref.png
diff --git a/test/surface-pattern-scale-up.ref.png b/test/surface-pattern-scale-up.ref.png
index 821f5402..41aafaf6 100644
--- a/test/surface-pattern-scale-up.ref.png
+++ b/test/surface-pattern-scale-up.ref.png