alexpete
29 lines
1.1 KiB
Plaintext
29 lines
1.1 KiB
Plaintext
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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*/
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#define PROVISIONAL_TONEMAP_GAMMA 2.4
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float4 ApplyProvisionalTonemap(float4 color)
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{
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// Provisional tone mapping will be applied using Reinhard, then applying gamma to handle the color in perceptual color space.
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float3 toneMappedColor = color.xyz / (1.0 + color.xyz);
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return float4(pow(toneMappedColor, 1.0 / PROVISIONAL_TONEMAP_GAMMA), color.w);
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}
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float4 ApplyInverseProvisionalTonemap(float4 color)
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{
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// This is inverse function of provisional tone mapping.
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float3 linearValue = pow(color.xyz, PROVISIONAL_TONEMAP_GAMMA);
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return float4(linearValue / (1.0 - linearValue), color.w);
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}
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