Blitでuint4をそのままコピーするシェーダー

Uint4Copy.shader

Shader "Unlit/Uint4Copy"
{
    Properties
    {
        [NoScaleOffset] _MainTex ("Texture", 2D) = "white" { }
    }
    SubShader
    {
        Tags { "RenderType" = "Opaque" }
        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;
            };

            Texture2D<uint4> _MainTex;

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

            uint4 frag(v2f i) : SV_Target
            {
                int2 size;
                _MainTex.GetDimensions(size.x, size.y);
                return _MainTex[int2(i.uv * float2(size))];
            }
            ENDCG
        }
    }
}