.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"

.PP

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)\&.

.PP

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

.PP

Not all display hardware is able to change gamma\&.

.SH "RETURN VALUE"

.PP

Returns -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