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+<HTML
+><HEAD
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+>SDL_SetGammaRamp</TITLE
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+>SDL Library Documentation</TH
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+><H1
+><A
+NAME="SDLSETGAMMARAMP"
+></A
+>SDL_SetGammaRamp</H1
+><DIV
+CLASS="REFNAMEDIV"
+><A
+NAME="AEN1624"
+></A
+><H2
+>Name</H2
+>SDL_SetGammaRamp&nbsp;--&nbsp;Sets the color gamma lookup tables for the display</DIV
+><DIV
+CLASS="REFSYNOPSISDIV"
+><A
+NAME="AEN1627"
+></A
+><H2
+>Synopsis</H2
+><DIV
+CLASS="FUNCSYNOPSIS"
+><A
+NAME="AEN1628"
+></A
+><P
+></P
+><PRE
+CLASS="FUNCSYNOPSISINFO"
+>#include "SDL.h"</PRE
+><P
+><CODE
+><CODE
+CLASS="FUNCDEF"
+>int <B
+CLASS="FSFUNC"
+>SDL_SetGammaRamp</B
+></CODE
+>(Uint16 *redtable, Uint16 *greentable, Uint16 *bluetable);</CODE
+></P
+><P
+></P
+></DIV
+></DIV
+><DIV
+CLASS="REFSECT1"
+><A
+NAME="AEN1634"
+></A
+><H2
+>Description</H2
+><P
+>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.</P
+><P
+>This function adjusts the gamma based on lookup tables, you can also
+have the gamma calculated based on a "gamma function" parameter with
+<A
+HREF="sdlsetgamma.html"
+>SDL_SetGamma</A
+>.</P
+><P
+>Not all display hardware is able to change gamma.</P
+></DIV
+><DIV
+CLASS="REFSECT1"
+><A
+NAME="AEN1640"
+></A
+><H2
+>Return Value</H2
+><P
+>Returns -1 on error (or if gamma adjustment is not supported).</P
+></DIV
+><DIV
+CLASS="REFSECT1"
+><A
+NAME="AEN1643"
+></A
+><H2
+>See Also</H2
+><P
+><A
+HREF="sdlsetgamma.html"
+>SDL_SetGamma</A
+>
+<A
+HREF="sdlgetgammaramp.html"
+>SDL_GetGammaRamp</A
+></P
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