SDL-mirror/docs/man3/SDL_SetGammaRamp.3

.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
Updated from the SDL Documentation Project --HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40182 2001-09-14 02:41:09 +00:00			`.TH "SDL_SetGammaRamp" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference"`
Initial revision --HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401 2001-04-26 16:45:43 +00:00			`.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`
Updated from the SDL Documentation Project --HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40182 2001-09-14 02:41:09 +00:00			`...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01`