Mercurial > sdl-ios-xcode
diff docs/man3/SDL_SetGamma.3 @ 0:74212992fb08
Initial revision
author | Sam Lantinga <slouken@lokigames.com> |
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date | Thu, 26 Apr 2001 16:45:43 +0000 |
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children | 55f1f1b3e27d |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/docs/man3/SDL_SetGamma.3 Thu Apr 26 16:45:43 2001 +0000 @@ -0,0 +1,22 @@ +.TH "SDL_SetGamma" "3" "Mon 12 Mar 2001, 01:04" "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, Mon 12 Mar 2001, 01:04