add tonemapping shaders

shader/r_composition.vert

@@ -0,0 +1,17 @@
+#version 460 core
+/**
+ * Copyright (c) 2018-2020 www.hyzgame.com
+ *
+ * Create by ShaderMaker
+ */
+
+layout(location = 0) in vec2 Vertex;
+
+layout(location = 0) out vec2 vs_out_position;
+
+void main()
+{
+    gl_Position=vec4(Vertex,0.0,1.0);
+
+    vs_out_position=(Vertex+1.0)/2.0;
+}