// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

Shader "Color Space/YCbCrtoRGB" 
{
    Properties 
    {
        _YTex ("Y (RGB)", 2D) = "black" {}
        _CrTex ("Cr (RGB)", 2D) = "gray" {}
        _CbTex ("Cb (RGB)", 2D) = "gray" {}
    }
    SubShader 
    {
		Tags { "RenderType"="Opaque" }
        Pass 
        {
			ColorMask RGB
			Lighting Off Fog { Color (0,0,0,0) }

			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag

			#include "UnityCG.cginc"

			sampler2D _YTex;
			sampler2D _CbTex;
			sampler2D _CrTex;
			
			#include "YCbCrtoRGB.cginc"

			struct v2f 
			{
				float4  pos : SV_POSITION;
				half2  uvY : TEXCOORD0;
				half2  uvCbCr : TEXCOORD1;
			};

			float4 _YTex_ST;
			float4 _CbTex_ST;

			v2f vert (appdata_base v)
			{
				v2f o;
				o.pos = UnityObjectToClipPos (v.vertex);
				o.uvY = TRANSFORM_TEX (v.texcoord, _YTex);
				o.uvCbCr = TRANSFORM_TEX (v.texcoord, _CbTex);
				return o;
			}

			fixed4 frag (v2f i) : COLOR
			{
				return YCbCrToRGB(SampleYCbCr( i.uvY, i.uvCbCr));
			}
			ENDCG
		}
	}
}