View Source: SDL_SetGammaRamp(3) - Waikato Linux Users Group

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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''
----

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Last edited on Monday, June 3, 2002 6:53:48 pm by "perry"

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