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SDL_SetGammaRamp(3) SDL API Reference SDL_SetGammaRamp(3)
SDL_SetGammaRamp - Sets the color gamma lookup tables for the display
int SDL_SetGammaRamp(Uint16 *redtable, Uint16 *greentable, Uint16 *bluetable);
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 chan-
nels to leave them unchanged.
This function adjusts the gamma based on lookup tables, you can also have the gamma calcu-
lated based on a "gamma function" parameter with SDL_SetGamma.
Not all display hardware is able to change gamma.
Returns -1 on error (or if gamma adjustment is not supported).
SDL Tue 11 Sep 2001, 23:01 SDL_SetGammaRamp(3)
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