SDL_!SetGammaRamp?

SDL_!SetGammaRamp?

NAME SYNOPSIS DESCRIPTION RETURN VALUE SEE ALSO

NAME

SDL_!SetGammaRamp?- Sets the color gamma lookup tables for the display

SYNOPSIS

#include

int SDL_!SetGammaRamp?(__Uint16 *redtable, Uint16

• greentable, Uint16 *bluetable__);

DESCRIPTION

Sets the gamma lookup tables for the display for each color component. Each table is an array of 256 Uint16 values, representing a mapping between the input and output for that channel. The input is the index into the array, and the output is the 16-bit gamma value at that index, scaled to the output color precision. You may pass NULL to any of the channels to leave them unchanged.

This function adjusts the gamma based on lookup tables, you can also have the gamma calculated based on a SDL_!SetGamma?''.

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_!SetGamma? SDL_!GetGammaRamp?