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/indra/newview/app_settings/shaders/class2/windlight/gammaF.glsl

https://bitbucket.org/lindenlab/viewer-beta/
Unknown | 44 lines | 36 code | 8 blank | 0 comment | 0 complexity | a9e0930932b2da013b86b3987b7718f0 MD5 | raw file
Possible License(s): LGPL-2.1
  1. /**
  2. * @file gammaF.glsl
  3. *
  4. * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  5. * Second Life Viewer Source Code
  6. * Copyright (C) 2007, Linden Research, Inc.
  7. *
  8. * This library is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU Lesser General Public
  10. * License as published by the Free Software Foundation;
  11. * version 2.1 of the License only.
  12. *
  13. * This library is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16. * Lesser General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU Lesser General Public
  19. * License along with this library; if not, write to the Free Software
  20. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21. *
  22. * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
  23. * $/LicenseInfo$
  24. */
  25. uniform vec4 gamma;
  26. vec3 getAtmosAttenuation();
  27. /// Soft clips the light with a gamma correction
  28. vec3 scaleSoftClip(vec3 light) {
  29. //soft clip effect:
  30. light = 1. - clamp(light, vec3(0.), vec3(1.));
  31. light = 1. - pow(light, gamma.xxx);
  32. return light;
  33. }
  34. vec3 fullbrightScaleSoftClip(vec3 light) {
  35. return mix(scaleSoftClip(light.rgb), light.rgb, getAtmosAttenuation());
  36. }