Mercurial > sdl-ios-xcode
view docs/man3/SDL_SetGamma.3 @ 4254:8afecb86be35 SDL-1.2
Fixed bug #616
rainer canavan 2009-03-29 12:30:12 PDT
add default visual to this->hidden->visuals
X11_SetIcon appears to have problems getting the correct bpp for the default
visual of my screen. With larger icons, this causes a segfault somewhere in
libX11. Instead of adding the default visual to the internal list, I can work
around this problem (both the segfault and the distortion) by setting bpp to 32
before sicon = SDL_CreateRGBSurface(...) in X11_SetIcon, although with this
patch, it stays at 24.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 27 Sep 2009 22:41:34 +0000 |
| parents | 4e3b250c950e |
| children | 1238da4a7112 |
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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