SDL_SetGamma man page

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" parameter, 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).

See Also

SDL_GetGammaRamp SDL_SetGammaRamp

Info

Tue 11 Sep 2001, 23:01 SDL SDL API Reference