// Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)

#pragma kernel CreateFoveatedShadingRateTexture
#pragma only_renderers d3d11 vulkan

#include "Internal-CreateFoveatedShadingRateTexture.cginc"

RWTexture2D<uint> _Result;

// 1 thread for z because we run both eyes and then combine them with a min operator
[numthreads(8,8,1)]
void CreateFoveatedShadingRateTexture(uint3 id : SV_DispatchThreadID)
{
    uint leftShadingRateLevel = GetShadingRateLevel(uint3(id.xy, kLeftEyeId));
    uint rightShadingRateLevel = GetShadingRateLevel(uint3(id.xy, kRightEyeId));
    _Result[uint2(id.x, id.y)] = min(rightShadingRateLevel, leftShadingRateLevel);
}