bionic (3) SDL_SetGammaRamp.3.gz

Provided by: libsdl1.2-dev_1.2.15+dfsg2-0.1ubuntu0.2_amd64 bug

NAME
       SDL_SetGammaRamp - Sets the color gamma lookup tables for the display


SYNOPSIS
       #include "SDL.h"

       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
       "gamma function" parameter with 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