Mercurial > sdl-ios-xcode
view docs/man3/SDL_SetGammaRamp.3 @ 2931:e705adf6f3dc
Date: Mon, 29 Dec 2008 23:29:52 +0100
From: Couriersud
Subject: SDL1.3: Some X11 diffs
The attached diff fixes the following issues in the X11 backend:
a) When calling resize, actually a move was performed. This has been
corrected.
b) DisplayHeight and DisplayWidth do not return up-to-date information
after a modeswitch using the xrandr code, which I enabled in
x11_modes.c
Height and width are now queried from the root window and all
occurrences of DisplayHeight and DisplayWidth changed.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 30 Dec 2008 17:09:42 +0000 |
| parents | 546f7c1eb755 |
| children | 1238da4a7112 |
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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