Add Composite2.shader

Author: gam0022

Assets/Demoscene/Projects/2018-07-28-Composite/Composite2.shader

@@ -0,0 +1,52 @@
+Shader "Hidden/Composite2"
+{
+	Properties
+	{
+		_MainTex ("Texture", 2D) = "white" {}
+	}
+	SubShader
+	{
+		// No culling or depth
+		Cull Off ZWrite Off ZTest Always
+
+		Pass
+		{
+			CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+			
+			#include "UnityCG.cginc"
+
+			struct appdata
+			{
+				float4 vertex : POSITION;
+				float2 uv : TEXCOORD0;
+			};
+
+			struct v2f
+			{
+				float2 uv : TEXCOORD0;
+				float4 vertex : SV_POSITION;
+			};
+
+			v2f vert (appdata v)
+			{
+				v2f o;
+				o.vertex = UnityObjectToClipPos(v.vertex);
+				o.uv = v.uv;
+				return o;
+			}
+			
+			sampler2D _MainTex;
+
+			fixed4 frag (v2f i) : SV_Target
+			{
+				fixed4 col = tex2D(_MainTex, i.uv);
+				// just invert the colors
+				col.rgb = 1 - col.rgb;
+				return col;
+			}
+			ENDCG
+		}
+	}
+}