mirror of
https://github.com/dhewm/dhewm3-libs.git
synced 2024-11-27 22:32:54 +00:00
c3bc09dc60
./configure --host=i686-w64-mingw32 \ --prefix=$HOME/devel/games/doom3-libs/i686-w64-mingw32
22 lines
1.1 KiB
Groff
22 lines
1.1 KiB
Groff
.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
|