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/**
* @file postDeferredTonemap.glsl
*
* $LicenseInfo:firstyear=2024&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2024, 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
* $/LicenseInfo$
*/
/*[EXTRA_CODE_HERE]*/
out vec4 frag_color;
uniform sampler2D diffuseRect;
in vec2 vary_fragcoord;
#ifdef GAMMA_CORRECT
uniform float gamma;
#endif
vec3 linear_to_srgb(vec3 cl);
vec3 toneMap(vec3 color);
vec3 clampHDRRange(vec3 color);
#ifdef GAMMA_CORRECT
vec3 legacyGamma(vec3 color)
{
vec3 c = 1. - clamp(color, vec3(0.), vec3(1.));
c = 1. - pow(c, vec3(gamma)); // s/b inverted already CPU-side
return c;
}
#endif
void main()
{
//this is the one of the rare spots where diffuseRect contains linear color values (not sRGB)
vec4 diff = texture(diffuseRect, vary_fragcoord);
#ifndef NO_POST
diff.rgb = toneMap(diff.rgb);
#else
diff.rgb = clamp(diff.rgb, vec3(0.0), vec3(1.0));
#endif
#ifdef GAMMA_CORRECT
diff.rgb = linear_to_srgb(diff.rgb);
#ifdef LEGACY_GAMMA
diff.rgb = legacyGamma(diff.rgb);
#endif
#endif
diff.rgb = clamp(diff.rgb, vec3(0.0), vec3(1.0)); // We should always be 0-1 past this point
//debugExposure(diff.rgb);
frag_color = diff;
}
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