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/*
* Copyright (C) 2010-2017 Team XBMC
* http://xbmc.org
*
* This Program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This Program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with XBMC; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#if defined(XBMC_DITHER)
uniform sampler2D m_dither;
uniform float m_ditherquant;
uniform vec2 m_dithersize;
#endif
#if defined(KODI_3DLUT)
uniform float m_CLUTsize;
uniform sampler3D m_CLUT;
#endif
void main()
{
vec4 rgb = process();
#if defined(KODI_3DLUT)
// FIXME: can this be optimized?
rgb = texture3D(m_CLUT, (rgb.rgb*(m_CLUTsize-1.0) + 0.5) / m_CLUTsize);
#endif
#if defined(XBMC_FULLRANGE)
#if __VERSION__ <= 120
rgb = (rgb-(16.0/255.0)) * 255.0/219.0;
#else
rgb = clamp((rgb-(16.0/255.0)) * 255.0/219.0, 0, 1);
#endif
#endif
#if defined(XBMC_DITHER)
vec2 ditherpos = gl_FragCoord.xy / m_dithersize;
// ditherval is multiplied by 65536/(dither_size^2) to make it [0,1[
// FIXME: scale dither values before uploading?
float ditherval = texture2D(m_dither, ditherpos).r * 16.0;
rgb = floor(rgb * m_ditherquant + ditherval) / m_ditherquant;
#endif
gl_FragColor = rgb;
}
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