Mercurial > sdl-ios-xcode
annotate docs/html/sdlsetgammaramp.html @ 3908:6e41f5d80198 SDL-1.2
Actually, this is dumb, just simplify this for now.
(But what if this finds the wrong symbol? We really should make this a
./configure test and only do one dlsym or the other depending on the
platform...)
Reference Bugzilla #354.
--ryan.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sat, 03 Feb 2007 08:17:12 +0000 |
| parents | 355632dca928 |
| children |
| rev | line source |
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| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_SetGammaRamp</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ |
| 0 | 8 "><LINK |
| 9 REL="HOME" | |
| 10 TITLE="SDL Library Documentation" | |
| 11 HREF="index.html"><LINK | |
| 12 REL="UP" | |
| 13 TITLE="Video" | |
| 14 HREF="video.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_GetGammaRamp" | |
| 17 HREF="sdlgetgammaramp.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_MapRGB" | |
| 20 HREF="sdlmaprgb.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="REFENTRY" | |
| 23 BGCOLOR="#FFF8DC" | |
| 24 TEXT="#000000" | |
| 25 LINK="#0000ee" | |
| 26 VLINK="#551a8b" | |
| 27 ALINK="#ff0000" | |
| 28 ><DIV | |
| 29 CLASS="NAVHEADER" | |
| 30 ><TABLE | |
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31 SUMMARY="Header navigation table" |
| 0 | 32 WIDTH="100%" |
| 33 BORDER="0" | |
| 34 CELLPADDING="0" | |
| 35 CELLSPACING="0" | |
| 36 ><TR | |
| 37 ><TH | |
| 38 COLSPAN="3" | |
| 39 ALIGN="center" | |
| 40 >SDL Library Documentation</TH | |
| 41 ></TR | |
| 42 ><TR | |
| 43 ><TD | |
| 44 WIDTH="10%" | |
| 45 ALIGN="left" | |
| 46 VALIGN="bottom" | |
| 47 ><A | |
| 48 HREF="sdlgetgammaramp.html" | |
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49 ACCESSKEY="P" |
| 0 | 50 >Prev</A |
| 51 ></TD | |
| 52 ><TD | |
| 53 WIDTH="80%" | |
| 54 ALIGN="center" | |
| 55 VALIGN="bottom" | |
| 56 ></TD | |
| 57 ><TD | |
| 58 WIDTH="10%" | |
| 59 ALIGN="right" | |
| 60 VALIGN="bottom" | |
| 61 ><A | |
| 62 HREF="sdlmaprgb.html" | |
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63 ACCESSKEY="N" |
| 0 | 64 >Next</A |
| 65 ></TD | |
| 66 ></TR | |
| 67 ></TABLE | |
| 68 ><HR | |
| 69 ALIGN="LEFT" | |
| 70 WIDTH="100%"></DIV | |
| 71 ><H1 | |
| 72 ><A | |
| 73 NAME="SDLSETGAMMARAMP" | |
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74 ></A |
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75 >SDL_SetGammaRamp</H1 |
| 0 | 76 ><DIV |
| 77 CLASS="REFNAMEDIV" | |
| 78 ><A | |
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79 NAME="AEN1624" |
| 0 | 80 ></A |
| 81 ><H2 | |
| 82 >Name</H2 | |
| 83 >SDL_SetGammaRamp -- Sets the color gamma lookup tables for the display</DIV | |
| 84 ><DIV | |
| 85 CLASS="REFSYNOPSISDIV" | |
| 86 ><A | |
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87 NAME="AEN1627" |
| 0 | 88 ></A |
| 89 ><H2 | |
| 90 >Synopsis</H2 | |
| 91 ><DIV | |
| 92 CLASS="FUNCSYNOPSIS" | |
| 93 ><A | |
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94 NAME="AEN1628" |
| 0 | 95 ></A |
| 96 ><P | |
| 97 ></P | |
| 98 ><PRE | |
| 99 CLASS="FUNCSYNOPSISINFO" | |
| 100 >#include "SDL.h"</PRE | |
| 101 ><P | |
| 102 ><CODE | |
| 103 ><CODE | |
| 104 CLASS="FUNCDEF" | |
| 105 >int <B | |
| 106 CLASS="FSFUNC" | |
| 107 >SDL_SetGammaRamp</B | |
| 108 ></CODE | |
| 109 >(Uint16 *redtable, Uint16 *greentable, Uint16 *bluetable);</CODE | |
| 110 ></P | |
| 111 ><P | |
| 112 ></P | |
| 113 ></DIV | |
| 114 ></DIV | |
| 115 ><DIV | |
| 116 CLASS="REFSECT1" | |
| 117 ><A | |
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118 NAME="AEN1634" |
| 0 | 119 ></A |
| 120 ><H2 | |
| 121 >Description</H2 | |
| 122 ><P | |
| 123 >Sets the gamma lookup tables for the display for each color component. | |
| 124 Each table is an array of 256 Uint16 values, representing a mapping | |
| 125 between the input and output for that channel. The input is the index | |
| 126 into the array, and the output is the 16-bit gamma value at that index, | |
| 127 scaled to the output color precision. You may pass NULL to any of the | |
| 128 channels to leave them unchanged.</P | |
| 129 ><P | |
| 130 >This function adjusts the gamma based on lookup tables, you can also | |
| 131 have the gamma calculated based on a "gamma function" parameter with | |
| 132 <A | |
| 133 HREF="sdlsetgamma.html" | |
| 134 >SDL_SetGamma</A | |
| 135 >.</P | |
| 136 ><P | |
| 137 >Not all display hardware is able to change gamma.</P | |
| 138 ></DIV | |
| 139 ><DIV | |
| 140 CLASS="REFSECT1" | |
| 141 ><A | |
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142 NAME="AEN1640" |
| 0 | 143 ></A |
| 144 ><H2 | |
| 145 >Return Value</H2 | |
| 146 ><P | |
| 147 >Returns -1 on error (or if gamma adjustment is not supported).</P | |
| 148 ></DIV | |
| 149 ><DIV | |
| 150 CLASS="REFSECT1" | |
| 151 ><A | |
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152 NAME="AEN1643" |
| 0 | 153 ></A |
| 154 ><H2 | |
| 155 >See Also</H2 | |
| 156 ><P | |
| 157 ><A | |
| 158 HREF="sdlsetgamma.html" | |
| 159 >SDL_SetGamma</A | |
| 160 > | |
| 161 <A | |
| 162 HREF="sdlgetgammaramp.html" | |
| 163 >SDL_GetGammaRamp</A | |
| 164 ></P | |
| 165 ></DIV | |
| 166 ><DIV | |
| 167 CLASS="NAVFOOTER" | |
| 168 ><HR | |
| 169 ALIGN="LEFT" | |
| 170 WIDTH="100%"><TABLE | |
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171 SUMMARY="Footer navigation table" |
| 0 | 172 WIDTH="100%" |
| 173 BORDER="0" | |
| 174 CELLPADDING="0" | |
| 175 CELLSPACING="0" | |
| 176 ><TR | |
| 177 ><TD | |
| 178 WIDTH="33%" | |
| 179 ALIGN="left" | |
| 180 VALIGN="top" | |
| 181 ><A | |
| 182 HREF="sdlgetgammaramp.html" | |
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183 ACCESSKEY="P" |
| 0 | 184 >Prev</A |
| 185 ></TD | |
| 186 ><TD | |
| 187 WIDTH="34%" | |
| 188 ALIGN="center" | |
| 189 VALIGN="top" | |
| 190 ><A | |
| 191 HREF="index.html" | |
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192 ACCESSKEY="H" |
| 0 | 193 >Home</A |
| 194 ></TD | |
| 195 ><TD | |
| 196 WIDTH="33%" | |
| 197 ALIGN="right" | |
| 198 VALIGN="top" | |
| 199 ><A | |
| 200 HREF="sdlmaprgb.html" | |
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201 ACCESSKEY="N" |
| 0 | 202 >Next</A |
| 203 ></TD | |
| 204 ></TR | |
| 205 ><TR | |
| 206 ><TD | |
| 207 WIDTH="33%" | |
| 208 ALIGN="left" | |
| 209 VALIGN="top" | |
| 210 >SDL_GetGammaRamp</TD | |
| 211 ><TD | |
| 212 WIDTH="34%" | |
| 213 ALIGN="center" | |
| 214 VALIGN="top" | |
| 215 ><A | |
| 216 HREF="video.html" | |
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217 ACCESSKEY="U" |
| 0 | 218 >Up</A |
| 219 ></TD | |
| 220 ><TD | |
| 221 WIDTH="33%" | |
| 222 ALIGN="right" | |
| 223 VALIGN="top" | |
| 224 >SDL_MapRGB</TD | |
| 225 ></TR | |
| 226 ></TABLE | |
| 227 ></DIV | |
| 228 ></BODY | |
| 229 ></HTML | |
| 230 > |