Mercurial > sdl-ios-xcode
view docs/man3/SDL_SetGammaRamp.3 @ 1194:b8f167923bfc
Date: Sun, 04 Dec 2005 21:43:46 -0500
From: Jonathan Atkins <jcatki@jcatki.no-ip.org>
Subject: SDL patch: DGA key events
I kept seeing DGA die on me whenever I press a key.
I tracked it down and it seems that the new indirect X via pointers
system messed it up. It needed to have the pX* pointers well defined to
call, in particular, pXNextEvent. Also, the X11_TranslateKey function
prototype was changed, but not updated in the dga driver. perhaps other
files are also affected.
Not sure what releases may suffer from this too.
thanks!
-Jon Atkins
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 05 Dec 2005 04:36:53 +0000 |
| parents | e5bc29de3f0a |
| children | 546f7c1eb755 |
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.TH "SDL_SetGammaRamp" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" .SH "NAME" SDL_SetGammaRamp\- Sets the color gamma lookup tables for the display .SH "SYNOPSIS" .PP \fB#include "SDL\&.h" .sp \fBint \fBSDL_SetGammaRamp\fP\fR(\fBUint16 *redtable, Uint16 *greentable, Uint16 *bluetable\fR); .SH "DESCRIPTION" .PP Sets the gamma lookup tables for the display for each color component\&. Each table is an array of 256 Uint16 values, representing a mapping between the input and output for that channel\&. The input is the index into the array, and the output is the 16-bit gamma value at that index, scaled to the output color precision\&. You may pass NULL to any of the channels to leave them unchanged\&. .PP This function adjusts the gamma based on lookup tables, you can also have the gamma calculated based on a "gamma function" parameter with \fISDL_SetGamma\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_SetGamma\fR \fISDL_GetGammaRamp\fR ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01