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view docs/man3/SDL_SetGamma.3 @ 4287:0620847bf1a8 SDL-1.2

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Fixed bug #798 kty@lavabit.com 2009-09-19 14:19:04 PDT The stable release of SDL 1.2.13 for BeOS/Haiku has a bug in BE_FindClosestFSMode that causes it to sometimes not select the best mode when going fullscreen. There are in fact two bugs in the implementation but I will not go into specifics because there is already a patch for it in the developer SVN 1.3. However I am still reporting it because I believe the following code is a better patch for the issue. The current implementation on SVN only works if it is able to find an exact match for the requested mode. However, by scanning from lowest-to-highest resolution instead of highest-to-lowest, one can find the best mode at all times
author Sam Lantinga <slouken@libsdl.org>
date Sat, 10 Oct 2009 02:11:07 +0000
parents 4e3b250c950e
children 1238da4a7112
line wrap: on
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.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