// Copyright (c) 2019-present Evereal. All rights reserved.

Shader "VideoCapture/CubemapDisplay"
{
  Properties
  {
  }
  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;
        float3 uv : TEXCOORD0;
      };

      struct v2f
      {
        float3 uv : TEXCOORD0;
        float4 vertex : SV_POSITION;
      };

      samplerCUBE _CubeTex;
      float2 _SphereScale;
      float2 _SphereOffset;
      float4x4 _CubeTransform;

      v2f vert(appdata v)
      {
        v2f o;
        o.vertex = UnityObjectToClipPos(v.vertex);
        o.uv = v.uv * float3(1.0, _SphereScale.y, 1.0);
        return o;
      }

      fixed4 frag(v2f i) : SV_Target
      {
        float3 dir = mul(_CubeTransform, float4(i.uv, 1)).xyz;
        fixed4 col = texCUBE(_CubeTex, dir);
        return col;
      }
      ENDCG
    }
  }
}