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OpenSolaris 2009.06 - man page for sdl_setgamma (opensolaris section 3)

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SDL_SetGamma(3) 			SDL API Reference			  SDL_SetGamma(3)

       SDL_SetGamma - Sets the color gamma function for the display

       #include "SDL.h"

       int SDL_SetGamma(float redgamma, float greengamma, float bluegamma);

       Sets  the  "gamma  function"  for  the display of each color component. Gamma controls the
       brightness/contrast of colors displayed on the screen. A gamma value of	1.0  is  identity
       (i.e., no adjustment is made).

       This  function adjusts the gamma based on the "gamma function" parameter, you can directly
       specify lookup tables for gamma adjustment with SDL_SetGammaRamp.

       Not all display hardware is able to change gamma.

       Returns -1 on error (or if gamma adjustment is not supported).

       SDL_GetGammaRamp SDL_SetGammaRamp

SDL				      Tue 11 Sep 2001, 23:01			  SDL_SetGamma(3)
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