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diff docs/html/sdlsetgamma.html @ 0:74212992fb08

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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
parents
children 55f1f1b3e27d
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+++ b/docs/html/sdlsetgamma.html	Thu Apr 26 16:45:43 2001 +0000
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+<HTML
+><HEAD
+><TITLE
+>SDL_SetGamma</TITLE
+><META
+NAME="GENERATOR"
+CONTENT="Modular DocBook HTML Stylesheet Version 1.61
+"><LINK
+REL="HOME"
+TITLE="SDL Library Documentation"
+HREF="index.html"><LINK
+REL="UP"
+TITLE="Video"
+HREF="video.html"><LINK
+REL="PREVIOUS"
+TITLE="SDL_SetPalette"
+HREF="sdlsetpalette.html"><LINK
+REL="NEXT"
+TITLE="SDL_GetGammaRamp"
+HREF="sdlgetgammaramp.html"></HEAD
+><BODY
+CLASS="REFENTRY"
+BGCOLOR="#FFF8DC"
+TEXT="#000000"
+LINK="#0000ee"
+VLINK="#551a8b"
+ALINK="#ff0000"
+><DIV
+CLASS="NAVHEADER"
+><TABLE
+WIDTH="100%"
+BORDER="0"
+CELLPADDING="0"
+CELLSPACING="0"
+><TR
+><TH
+COLSPAN="3"
+ALIGN="center"
+>SDL Library Documentation</TH
+></TR
+><TR
+><TD
+WIDTH="10%"
+ALIGN="left"
+VALIGN="bottom"
+><A
+HREF="sdlsetpalette.html"
+>Prev</A
+></TD
+><TD
+WIDTH="80%"
+ALIGN="center"
+VALIGN="bottom"
+></TD
+><TD
+WIDTH="10%"
+ALIGN="right"
+VALIGN="bottom"
+><A
+HREF="sdlgetgammaramp.html"
+>Next</A
+></TD
+></TR
+></TABLE
+><HR
+ALIGN="LEFT"
+WIDTH="100%"></DIV
+><H1
+><A
+NAME="SDLSETGAMMA"
+>SDL_SetGamma</A
+></H1
+><DIV
+CLASS="REFNAMEDIV"
+><A
+NAME="AEN1112"
+></A
+><H2
+>Name</H2
+>SDL_SetGamma&nbsp;--&nbsp;Sets the color gamma function for the display</DIV
+><DIV
+CLASS="REFSYNOPSISDIV"
+><A
+NAME="AEN1115"
+></A
+><H2
+>Synopsis</H2
+><DIV
+CLASS="FUNCSYNOPSIS"
+><A
+NAME="AEN1116"
+></A
+><P
+></P
+><PRE
+CLASS="FUNCSYNOPSISINFO"
+>#include "SDL.h"</PRE
+><P
+><CODE
+><CODE
+CLASS="FUNCDEF"
+>int <B
+CLASS="FSFUNC"
+>SDL_SetGamma</B
+></CODE
+>(float redgamma, float greengamma, float bluegamma);</CODE
+></P
+><P
+></P
+></DIV
+></DIV
+><DIV
+CLASS="REFSECT1"
+><A
+NAME="AEN1122"
+></A
+><H2
+>Description</H2
+><P
+>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 <TT
+CLASS="CONSTANT"
+>1.0</TT
+> is identity (i.e., no adjustment
+is made).</P
+><P
+>This function adjusts the gamma based on the "gamma function" parameter,
+you can directly specify lookup tables for gamma adjustment with
+<A
+HREF="sdlsetgammaramp.html"
+>SDL_SetGammaRamp</A
+>.</P
+><P
+>Not all display hardware is able to change gamma.</P
+></DIV
+><DIV
+CLASS="REFSECT1"
+><A
+NAME="AEN1129"
+></A
+><H2
+>Return Value</H2
+><P
+>Returns -1 on error (or if gamma adjustment is not supported).</P
+></DIV
+><DIV
+CLASS="REFSECT1"
+><A
+NAME="AEN1132"
+></A
+><H2
+>See Also</H2
+><P
+><A
+HREF="sdlgetgammaramp.html"
+>SDL_GetGammaRamp</A
+>
+<A
+HREF="sdlsetgammaramp.html"
+>SDL_SetGammaRamp</A
+></P
+></DIV
+><DIV
+CLASS="NAVFOOTER"
+><HR
+ALIGN="LEFT"
+WIDTH="100%"><TABLE
+WIDTH="100%"
+BORDER="0"
+CELLPADDING="0"
+CELLSPACING="0"
+><TR
+><TD
+WIDTH="33%"
+ALIGN="left"
+VALIGN="top"
+><A
+HREF="sdlsetpalette.html"
+>Prev</A
+></TD
+><TD
+WIDTH="34%"
+ALIGN="center"
+VALIGN="top"
+><A
+HREF="index.html"
+>Home</A
+></TD
+><TD
+WIDTH="33%"
+ALIGN="right"
+VALIGN="top"
+><A
+HREF="sdlgetgammaramp.html"
+>Next</A
+></TD
+></TR
+><TR
+><TD
+WIDTH="33%"
+ALIGN="left"
+VALIGN="top"
+>SDL_SetPalette</TD
+><TD
+WIDTH="34%"
+ALIGN="center"
+VALIGN="top"
+><A
+HREF="video.html"
+>Up</A
+></TD
+><TD
+WIDTH="33%"
+ALIGN="right"
+VALIGN="top"
+>SDL_GetGammaRamp</TD
+></TR
+></TABLE
+></DIV
+></BODY
+></HTML
+>
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