Mercurial > hg > orthanc-stone

comparison Framework/Scene2D/Internals/CairoLookupTableTextureRenderer.cpp @ 1163:ba9db2ad317c broker

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test log
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 19 Nov 2019 20:44:55 +0100
parents 6e888cf6a48b
children 177e7d431cd1
comparison
equal deleted inserted replaced
1162:709aa65aca17 1163:ba9db2ad317c
82 else if (v >= 255) 82 else if (v >= 255)
83 { 83 {
84 v = 255; 84 v = 255;
85 } 85 }
86 86
87 if (1) //l.IsApplyLog())
88 {
89 // https://theailearner.com/2019/01/01/log-transformation/
90 v = 255.0f / log(1.0f + 255.0f * 1.5f) * log(1.0f + static_cast<float>(v));
91 if (v <= 0)
92 {
93 v = 0;
94 }
95 else if (v >= 255)
96 {
97 v = 255;
98 }
99 }
100
87 uint8_t vv = static_cast<uint8_t>(v); 101 uint8_t vv = static_cast<uint8_t>(v);
88 102
89 q[0] = lut[4 * vv + 2]; // B 103 q[0] = lut[4 * vv + 2]; // B
90 q[1] = lut[4 * vv + 1]; // G 104 q[1] = lut[4 * vv + 1]; // G
91 q[2] = lut[4 * vv + 0]; // R 105 q[2] = lut[4 * vv + 0]; // R