Shader "Hidden/ScreenFaderComposite"
{
	Properties
	{
		_MainTex ("Texture", 2D) = "white" {}
	}
	SubShader
	{
		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
			{
				float4 vertex : SV_POSITION;
				float2 uv0 : TEXCOORD0;
			};

			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = UnityObjectToClipPos(v.vertex);
				o.uv0 = v.uv;

				return o;
			}
			
			sampler2D _MainTex;
			half4 _MainTex_ST;

			fixed4 _FadeColour;

			fixed4 frag (v2f i) : SV_Target
			{
				fixed4 colour = tex2D(_MainTex, UnityStereoScreenSpaceUVAdjust(i.uv0, _MainTex_ST));
				colour.xyz = colour.xyz * (1.0 - _FadeColour.a) + _FadeColour.xyz * _FadeColour.a;
				return colour;
			}
			ENDCG
		}
	}
}