SMAA, and the two lookup textures that ship beside these shaders, are used
under the MIT licence. The notice below is the one from the reference
implementation, kept here because the shaders in this folder are a port of it
and because SMAAAreaTex.png and SMAASearchTex.png are its precomputed
textures, unmodified.

The reference lives at http://www.iryoku.com/smaa/ and the textures are the
ones published with it. Only SMAA 1x is implemented here: the 2x and 4x modes
need multisample buffers or motion vectors, and a captured frame has neither.

  Copyright (C) 2013 Jorge Jimenez (jorge@iryoku.com)
  Copyright (C) 2013 Jose I. Echevarria (joseignacioechevarria@gmail.com)
  Copyright (C) 2013 Belen Masia (bmasia@unizar.es)
  Copyright (C) 2013 Fernando Navarro (fernandn@microsoft.com)
  Copyright (C) 2013 Diego Gutierrez (diegog@unizar.es)

  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to
  deal in the Software without restriction, including without limitation the
  rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  sell copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software. As clarification, there
  is no requirement that the copyright notice and permission be included in
  binary distributions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  IN THE SOFTWARE.
