yes

modules/wallpaper-engine/shaders/flat.frag

@@ -0,0 +1,13 @@
+
+uniform mediump float g_Alpha;
+uniform mediump vec3 g_Color;
+
+varying vec4 v_Color;
+
+void main() {
+	gl_FragColor = vec4(g_Color, g_Alpha);
+	
+#ifdef VERTEXCOLOR
+	gl_FragColor *= v_Color.rgba;
+#endif
+}