Mercurial > sdl-ios-xcode
view docs/man3/SDL_SetGamma.3 @ 4383:daf9e6037596 SDL-1.2
Gregory Smith
Another one for the "How did this ever work?" file: when
DX5_HandleMessage is called with WM_ACTIVATEAPP, it goes past the end
of the 2-element SDL_DIdev array and if there doesn't happen to be a 0
in the memory next to it, crashes. Patch against SVN attached.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 15 Nov 2009 17:21:24 +0000 |
| parents | 1238da4a7112 |
| children |
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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