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.TH "SDL_SetGamma" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference"
SDL_SetGamma \- Sets the color gamma function for the display
\fB#include "SDL\&.h"
\fBint \fBSDL_SetGamma\fP\fR(\fBfloat redgamma, float greengamma, float bluegamma\fR);
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 \fISDL_SetGammaRamp\fR\&.
Not all display hardware is able to change gamma\&.
Returns -1 on error (or if gamma adjustment is not supported)\&.
\fISDL_GetGammaRamp\fR \fISDL_SetGammaRamp\fR
.\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01