Shader "Hidden/EnviroBlitThroughURP17"
{
    SubShader
    {
        Tags { "RenderType"="Opaque" "RenderPipeline" = "UniversalPipeline"}
        LOD 100
        ZTest Always ZWrite Off Cull Off
        Pass
        { 
            Name "EnviroBlitThrough"

            HLSLPROGRAM
            #pragma vertex Vert
            #pragma fragment frag    
            #pragma multi_compile __ ENVIROURP 
    
        
#if defined (ENVIROURP)
                        
            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
            #include "Packages/com.unity.render-pipelines.core/Runtime/Utilities/Blit.hlsl"

            TEXTURE2D_X(_MainTex);
            SAMPLER(sampler_MainTex);

            half4 frag (Varyings input) : SV_Target
            {
                UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(input);
                return SAMPLE_TEXTURE2D_X(_MainTex, sampler_MainTex, input.texcoord);
            }

#else


            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 = v.vertex;
                o.uv = v.uv;
                return o;
            }

            sampler2D _MainTex;

            float4 frag (v2f i) : SV_Target
            {
                float4 col = tex2D(_MainTex, i.uv);
                // just invert the colors
                col.rgb = 1 - col.rgb;
                return col;
            }
        
#endif
            ENDHLSL
        }
    }
}