1<HTML 2><HEAD 3><TITLE 4>SDL_GetGammaRamp</TITLE 5><META 6NAME="GENERATOR" 7CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ 8"><LINK 9REL="HOME" 10TITLE="SDL Library Documentation" 11HREF="index.html"><LINK 12REL="UP" 13TITLE="Video" 14HREF="video.html"><LINK 15REL="PREVIOUS" 16TITLE="SDL_SetGamma" 17HREF="sdlsetgamma.html"><LINK 18REL="NEXT" 19TITLE="SDL_SetGammaRamp" 20HREF="sdlsetgammaramp.html"></HEAD 21><BODY 22CLASS="REFENTRY" 23BGCOLOR="#FFF8DC" 24TEXT="#000000" 25LINK="#0000ee" 26VLINK="#551a8b" 27ALINK="#ff0000" 28><DIV 29CLASS="NAVHEADER" 30><TABLE 31SUMMARY="Header navigation table" 32WIDTH="100%" 33BORDER="0" 34CELLPADDING="0" 35CELLSPACING="0" 36><TR 37><TH 38COLSPAN="3" 39ALIGN="center" 40>SDL Library Documentation</TH 41></TR 42><TR 43><TD 44WIDTH="10%" 45ALIGN="left" 46VALIGN="bottom" 47><A 48HREF="sdlsetgamma.html" 49ACCESSKEY="P" 50>Prev</A 51></TD 52><TD 53WIDTH="80%" 54ALIGN="center" 55VALIGN="bottom" 56></TD 57><TD 58WIDTH="10%" 59ALIGN="right" 60VALIGN="bottom" 61><A 62HREF="sdlsetgammaramp.html" 63ACCESSKEY="N" 64>Next</A 65></TD 66></TR 67></TABLE 68><HR 69ALIGN="LEFT" 70WIDTH="100%"></DIV 71><H1 72><A 73NAME="SDLGETGAMMARAMP" 74></A 75>SDL_GetGammaRamp</H1 76><DIV 77CLASS="REFNAMEDIV" 78><A 79NAME="AEN1598" 80></A 81><H2 82>Name</H2 83>SDL_GetGammaRamp -- Gets the color gamma lookup tables for the display</DIV 84><DIV 85CLASS="REFSYNOPSISDIV" 86><A 87NAME="AEN1601" 88></A 89><H2 90>Synopsis</H2 91><DIV 92CLASS="FUNCSYNOPSIS" 93><A 94NAME="AEN1602" 95></A 96><P 97></P 98><PRE 99CLASS="FUNCSYNOPSISINFO" 100>#include "SDL.h"</PRE 101><P 102><CODE 103><CODE 104CLASS="FUNCDEF" 105>int <B 106CLASS="FSFUNC" 107>SDL_GetGammaRamp</B 108></CODE 109>(Uint16 *redtable, Uint16 *greentable, Uint16 *bluetable);</CODE 110></P 111><P 112></P 113></DIV 114></DIV 115><DIV 116CLASS="REFSECT1" 117><A 118NAME="AEN1608" 119></A 120><H2 121>Description</H2 122><P 123>Gets the gamma translation lookup tables currently used by the display. 124Each table is an array of 256 Uint16 values.</P 125><P 126>Not all display hardware is able to change gamma.</P 127></DIV 128><DIV 129CLASS="REFSECT1" 130><A 131NAME="AEN1612" 132></A 133><H2 134>Return Value</H2 135><P 136>Returns -1 on error.</P 137></DIV 138><DIV 139CLASS="REFSECT1" 140><A 141NAME="AEN1615" 142></A 143><H2 144>See Also</H2 145><P 146><A 147HREF="sdlsetgamma.html" 148>SDL_SetGamma</A 149> 150<A 151HREF="sdlsetgammaramp.html" 152>SDL_SetGammaRamp</A 153></P 154></DIV 155><DIV 156CLASS="NAVFOOTER" 157><HR 158ALIGN="LEFT" 159WIDTH="100%"><TABLE 160SUMMARY="Footer navigation table" 161WIDTH="100%" 162BORDER="0" 163CELLPADDING="0" 164CELLSPACING="0" 165><TR 166><TD 167WIDTH="33%" 168ALIGN="left" 169VALIGN="top" 170><A 171HREF="sdlsetgamma.html" 172ACCESSKEY="P" 173>Prev</A 174></TD 175><TD 176WIDTH="34%" 177ALIGN="center" 178VALIGN="top" 179><A 180HREF="index.html" 181ACCESSKEY="H" 182>Home</A 183></TD 184><TD 185WIDTH="33%" 186ALIGN="right" 187VALIGN="top" 188><A 189HREF="sdlsetgammaramp.html" 190ACCESSKEY="N" 191>Next</A 192></TD 193></TR 194><TR 195><TD 196WIDTH="33%" 197ALIGN="left" 198VALIGN="top" 199>SDL_SetGamma</TD 200><TD 201WIDTH="34%" 202ALIGN="center" 203VALIGN="top" 204><A 205HREF="video.html" 206ACCESSKEY="U" 207>Up</A 208></TD 209><TD 210WIDTH="33%" 211ALIGN="right" 212VALIGN="top" 213>SDL_SetGammaRamp</TD 214></TR 215></TABLE 216></DIV 217></BODY 218></HTML 219>