.TH "SDL_SetGamma" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" +
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.SH "NAME"+
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SDL_SetGamma\- Sets the color gamma function for the display+
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.SH "SYNOPSIS"+
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.PP+
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\fB#include "SDL\&.h"+
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.sp+
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\fBint \fBSDL_SetGamma\fP\fR(\fBfloat redgamma, float greengamma, float bluegamma\fR);+
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.SH "DESCRIPTION"+
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.PP+
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Sets the "gamma function" for the display of each color component\&. Gamma controls the brightness/contrast of colors displayed on the screen\&. A gamma value of 1\&.0 is identity (i\&.e\&., no adjustment is made)\&.+
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.PP+
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This function adjusts the gamma based on the "gamma function" parameter, you can directly specify lookup tables for gamma adjustment with \fISDL_SetGammaRamp\fR\&.+
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.PP+
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Not all display hardware is able to change gamma\&.+
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.SH "RETURN VALUE"+
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.PP+
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Returns -1 on error (or if gamma adjustment is not supported)\&.+
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.SH "SEE ALSO"+
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.PP+
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\fISDL_GetGammaRamp\fR \fISDL_SetGammaRamp\fR+
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...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01+
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