mirror of
https://github.com/joel16/SDL2.git
synced 2024-12-13 22:38:34 +00:00
23 lines
961 B
Groff
23 lines
961 B
Groff
.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
|