[sdl_omap.git] / docs / man3 / SDL_SetGamma.3

.TH "SDL_SetGamma" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_SetGamma \- Sets the color gamma function for the display
.SH "SYNOPSIS"
.PP
\fB#include "SDL\&.h"
.sp
\fBint \fBSDL_SetGamma\fP\fR(\fBfloat redgamma, float greengamma, float bluegamma\fR);
.SH "DESCRIPTION"
.PP
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)\&.
.PP
This function adjusts the gamma based on the "gamma function" parameter, you can directly specify lookup tables for gamma adjustment with \fISDL_SetGammaRamp\fR\&.
.PP
Not all display hardware is able to change gamma\&.
.SH "RETURN VALUE"
.PP
Returns -1 on error (or if gamma adjustment is not supported)\&.
.SH "SEE ALSO"
.PP
\fISDL_GetGammaRamp\fR \fISDL_SetGammaRamp\fR
.\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01
Commit	Line	Data
e14743d1	1	.TH "SDL_SetGamma" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference"
	2	.SH "NAME"
	3	SDL_SetGamma \- Sets the color gamma function for the display
	4	.SH "SYNOPSIS"
	5	.PP
	6	\fB#include "SDL\&.h"
	7	.sp
	8	\fBint \fBSDL_SetGamma\fP\fR(\fBfloat redgamma, float greengamma, float bluegamma\fR);
	9	.SH "DESCRIPTION"
	10	.PP
	11	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)\&.
	12	.PP
	13	This function adjusts the gamma based on the "gamma function" parameter, you can directly specify lookup tables for gamma adjustment with \fISDL_SetGammaRamp\fR\&.
	14	.PP
	15	Not all display hardware is able to change gamma\&.
	16	.SH "RETURN VALUE"
	17	.PP
	18	Returns -1 on error (or if gamma adjustment is not supported)\&.
	19	.SH "SEE ALSO"
	20	.PP
	21	\fISDL_GetGammaRamp\fR \fISDL_SetGammaRamp\fR
	22	.\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01