DirectXShaderCompiler/tools/clang/test/CodeGenHLSL/Samples/MiniEngine/ConvertLDRToDisplayAltPS.hlsl

// RUN: %dxc -E main -T ps_6_0 %s | FileCheck %s

// CHECK: textureLoad
// CHECK: Log
// CHECK: Exp
// CHECK: Saturate
// 

//
// Copyright (c) Microsoft. All rights reserved.
// This code is licensed under the MIT License (MIT).
// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
//
// Developed by Minigraph
//
// Author:  James Stanard 
//

#include "ShaderUtility.hlsli"
#include "PresentRS.hlsli"

Texture2D<float3> ColorTex : register(t0);

cbuffer CB : register(b0)
{
	uint DisplayColorSpace;
	float Gamma;
	float LimitedScale;
	float LimitedBias;
};

[RootSignature(Present_RootSig)]
float3 main( float4 position : SV_Position ) : SV_Target0
{
	float3 LinearRGB = LinearizeColor(ColorTex[(int2)position.xy], LDR_COLOR_FORMAT);

	if (DisplayColorSpace == 10)
	{
		//return pow(saturate(LinearRGB), Gamma) * LimitedScale + LimitedBias;
		return saturate(LinearToREC709(LinearRGB)) * LimitedScale + LimitedBias;
	}

#if 1
	return ApplyColorProfile(LinearRGB, DisplayColorSpace);
#else
	return ApplyColorProfile(LinearRGB, COLOR_FORMAT_sRGB_FULL);
#endif

}