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RWTexture2D<uint> Values;
struct InputStruct {
float4 Position : SV_POSITION;
};
[earlydepthstencil]
uint main(InputStruct input) : SV_Target {
uint oldVal;
InterlockedExchange(Values[uint2(input.Position.x, input.Position.y)], 1.0, oldVal);
return oldVal;
}