Mercurial > sdl-ios-xcode
view docs/man3/SDL_SetGamma.3 @ 26:c447d5b9275d
Date: Wed, 9 May 2001 18:03:20 -0600
From: Peter Valchev <pvalchev@openbsd.org>
Subject: openbsd patches
- The dlsym() one is supposed to fix dynamic loading on our a.out
architectures, where prefixing of an underscore symbol is required.
Actually I don't know what kind of dynamic loading does SDL deal with,
but anyway. You may want to make that change global, but only gcc's
preprocessor passes __ELF__, I think, so you can just add Linux or
something if you decide so.
| author | Sam Lantinga <slouken@lokigames.com> |
|---|---|
| date | Thu, 10 May 2001 20:31:51 +0000 |
| parents | 74212992fb08 |
| children | 55f1f1b3e27d |
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.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