// Copyright Epic Games, Inc. All Rights Reserved.

/*=============================================================================
	LumenFloatQuantization.ush: Utility that quantizes floats for writing to render targets
=============================================================================*/

#pragma once

#include "../Quantization.ush"

// 2^(-NumMantissaBits)
float3 TargetFormatQuantizationError;

float3 QuantizeForFloatRenderTarget(float3 Color, float E, const float3 QuantizationError)
{
	return QuantizeFloatColor(Color, QuantizationError, E);
}

float3 QuantizeForFloatRenderTarget(float3 Color, float E)
{
	return QuantizeForFloatRenderTarget(Color, E, TargetFormatQuantizationError);
}

float3 QuantizeForFloatRenderTarget(float3 Color, int3 P)
{
	uint2 Random = Rand3DPCG16(P).xy;
	float E = Hammersley16(0, 1, Random).x;
	return QuantizeForFloatRenderTarget(Color, E);
}