1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
//----------------------------------------------------------------------------------
// File: FaceWorks/samples/sample_d3d11/shaders/tonemap.hlsli
// SDK Version: v1.0
// Email: [email protected]
// Site: http://developer.nvidia.com/
//
// Copyright (c) 2014-2016, NVIDIA CORPORATION. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of NVIDIA CORPORATION nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//----------------------------------------------------------------------------------
#ifndef TONEMAP_HLSLI
#define TONEMAP_HLSLI
#include "common.hlsli"
float3 Tonemap(float3 rgb)
{
// Apply exposure
rgb *= g_exposure;
// Apply the magic Jim Hejl tonemapping curve (see:
// http://www.slideshare.net/ozlael/hable-john-uncharted2-hdr-lighting, slide #140)
static const bool useTonemapping = true;
if (useTonemapping)
{
rgb = max(0, rgb - 0.004);
rgb = (rgb * (6.2 * rgb + 0.5)) / (rgb * (6.2 * rgb + 1.7) + 0.06);
}
else
{
// Just convert to SRGB gamma space
rgb = (rgb < 0.0031308) ? (12.92 * rgb) : (1.055 * pow(rgb, 1.0/2.4) - 0.055);
}
return rgb;
}
#endif // TONEMAP_HLSLI
|