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Text File  |  2008-01-23  |  252 b   |  12 lines
  1. /*
  2.  * clamptoalpha.sl -- imager shader that forces Ci to be non-negative
  3.  *    and with each component to greater than the alpha value of the
  4.  *    pixel.
  5.  */
  6.  
  7. imager
  8. k3d_clamptoalpha()
  9. {
  10.   Ci = clamp(Ci, color(0, 0, 0), color(alpha, alpha, alpha));
  11. }
  12.