man SDL_GetGammaRamp (3): Gets the color gamma lookup tables for the display

SDL_GetGammaRamp(3) Gets the color gamma lookup tables for the display

SYNOPSIS

#include "SDL.h"

int SDL_GetGammaRamp(Uint16 *redtable, Uint16 *greentable, Uint16 *bluetable);

Gets the gamma translation lookup tables currently used by the display. Each table is an array of 256 Uint16 values.

Not all display hardware is able to change gamma.

Returns -1 on error.