55 lines
1.7 KiB
GLSL
55 lines
1.7 KiB
GLSL
/**
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* @file srgb.glsl
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*
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* $LicenseInfo:firstyear=2007&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2007, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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vec3 srgb_to_linear(vec3 cs)
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{
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vec3 low_range = cs / vec3(12.92);
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vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
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bvec3 lte = lessThanEqual(cs,vec3(0.04045));
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vec3 result;
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result.r = lte.r ? low_range.r : high_range.r;
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result.g = lte.g ? low_range.g : high_range.g;
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result.b = lte.b ? low_range.b : high_range.b;
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return result;
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}
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vec3 linear_to_srgb(vec3 cl)
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{
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cl = clamp(cl, vec3(0), vec3(1));
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vec3 low_range = cl * 12.92;
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vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
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bvec3 lt = lessThan(cl,vec3(0.0031308));
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vec3 result;
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result.r = lt.r ? low_range.r : high_range.r;
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result.g = lt.g ? low_range.g : high_range.g;
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result.b = lt.b ? low_range.b : high_range.b;
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return result;
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}
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