.TH "SDL_SetGamma" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" .SH "NAME"SDL_SetGamma\- Sets the color gamma function for the display.SH "SYNOPSIS".PP\fB#include "SDL\&.h".sp\fBint \fBSDL_SetGamma\fP\fR(\fBfloat redgamma, float greengamma, float bluegamma\fR);.SH "DESCRIPTION".PPSets 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)\&..PPThis function adjusts the gamma based on the "gamma function" parameter, you can directly specify lookup tables for gamma adjustment with \fISDL_SetGammaRamp\fR\&..PPNot all display hardware is able to change gamma\&..SH "RETURN VALUE".PPReturns -1 on error (or if gamma adjustment is not supported)\&..SH "SEE ALSO".PP\fISDL_GetGammaRamp\fR \fISDL_SetGammaRamp\fR...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01