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Updated: Thursday, June 13, 2019
 
 

SDL_SetGamma (3)

Name

SDL_SetGamma - Sets the color gamma function for the display

Synopsis

#include "SDL.h"

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

Description

SDL_SetGamma(3)                SDL API Reference               SDL_SetGamma(3)



NAME
       SDL_SetGamma - Sets the color gamma function for the display

SYNOPSIS
       #include "SDL.h"

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

DESCRIPTION
       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" parame-
       ter, you can directly specify lookup tables for gamma  adjustment  with
       SDL_SetGammaRamp.

       Not all display hardware is able to change gamma.

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


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       +---------------+------------------+
       |ATTRIBUTE TYPE | ATTRIBUTE VALUE  |
       +---------------+------------------+
       |Availability   | library/sdl      |
       +---------------+------------------+
       |Stability      | Volatile         |
       +---------------+------------------+
SEE ALSO
       SDL_GetGammaRamp SDL_SetGammaRamp



NOTES
       This     software     was    built    from    source    available    at
       https://github.com/oracle/solaris-userland.   The  original   community
       source        was        downloaded        from        https://www.lib-
       sdl.org/release/SDL-1.2.15.tar.gz

       Further information about this software can be found on the open source
       community website at https://www.libsdl.org/.



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