[gtk+] gl: Add test case for clipped cross fade nodes

[Timm Bäder <baedert src gnome org>]

commit 228b35c111d0e5978972e06be0dedcb047f7caf8
Author: Timm Bäder <mail baedert org>
Date:   Sat Jan 27 12:19:22 2018 +0100

    gl: Add test case for clipped cross fade nodes

 testsuite/gsk/gl/clipped_cross_fade.gl.png |  Bin 0 -> 235 bytes
 testsuite/gsk/gl/clipped_cross_fade.node   |  Bin 0 -> 1111 bytes
 testsuite/gsk/meson.build                  |    3 ++-
 3 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/testsuite/gsk/gl/clipped_cross_fade.gl.png b/testsuite/gsk/gl/clipped_cross_fade.gl.png
new file mode 100644
index 0000000..2cc4ead
Binary files /dev/null and b/testsuite/gsk/gl/clipped_cross_fade.gl.png differ
diff --git a/testsuite/gsk/gl/clipped_cross_fade.node b/testsuite/gsk/gl/clipped_cross_fade.node
new file mode 100644
index 0000000..0f87de4
Binary files /dev/null and b/testsuite/gsk/gl/clipped_cross_fade.node differ
diff --git a/testsuite/gsk/meson.build b/testsuite/gsk/meson.build
index 8ee3087..da84bcd 100644
--- a/testsuite/gsk/meson.build
+++ b/testsuite/gsk/meson.build
@@ -44,7 +44,8 @@ gl_tests = [
   ['outset shadow blurred offset', 'outset_shadow_blurred_offset.node', 
'outset_shadow_blurred_offset.gl.png'],
   ['outset shadow transformed', 'outset_shadow_translated.node', 'outset_shadow_translated.gl.png'],
   ['Text with alpha', 'text_alpha.node', 'text_alpha.gl.png'],
-  ['Transform in Shadow', 'shadow_transform1.node', 'shadow_transform1.gl.png']
+  ['Transform in Shadow', 'shadow_transform1.node', 'shadow_transform1.gl.png'],
+  ['Clipped crossfade', 'clipped_cross_fade.node', 'clipped_cross_fade.gl.png'],
 ]
 
 foreach gl_test : gl_tests