| .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 |
