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/**
* @file class2\wl\gammaF.glsl
*
* $LicenseInfo:firstyear=2007&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2007, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
uniform float gamma;
uniform int no_atmo;
vec3 getAtmosAttenuation();
vec3 getAdditiveColor();
vec3 srgb_to_linear(vec3 col);
vec3 linear_to_srgb(vec3 col);
vec3 scaleSoftClipFragLinear(vec3 light)
{ // identical to non-linear version and that's probably close enough
if (no_atmo == 1)
{
return light;
}
//soft clip effect:
light = 1. - clamp(light, vec3(0.), vec3(1.));
light = 1. - pow(light, vec3(gamma)); // s/b inverted already CPU-side
return light;
}
vec3 scaleSoftClipFrag(vec3 light)
{
if (no_atmo == 1)
{
return light;
}
//soft clip effect:
light = 1. - clamp(light, vec3(0.), vec3(1.));
light = 1. - pow(light, vec3(gamma)); // s/b inverted already CPU-side
return light;
}
vec3 scaleSoftClip(vec3 light)
{
return scaleSoftClipFrag(light);
}
vec3 fullbrightScaleSoftClipFrag(vec3 light, vec3 add, vec3 atten)
{
//return mix(scaleSoftClipFrag(light.rgb), add, atten);
return scaleSoftClipFrag(light.rgb);
}
vec3 fullbrightScaleSoftClip(vec3 light)
{
return fullbrightScaleSoftClipFrag(light, getAdditiveColor(), getAtmosAttenuation());
}
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