1 files changed, 9 insertions, 0 deletions
diff --git a/tests/manual/scenegraph_lancelot/data/shared/shaders/desaturate.frag b/tests/manual/scenegraph_lancelot/data/shared/shaders/desaturate.frag
new file mode 100644
index 0000000000..a38f3d1de2
--- /dev/null
+++ b/tests/manual/scenegraph_lancelot/data/shared/shaders/desaturate.frag
@@ -0,0 +1,9 @@
+uniform lowp sampler2D source;
+varying highp vec2 qt_TexCoord0;
+
+void main() {
+    lowp vec4 c = texture2D(source, qt_TexCoord0);
+    lowp float level = c.r * 0.3 + c.g * 0.59 + c.b * 0.11;
+
+    gl_FragColor = vec4(level, level, level, c.a);
+}