home *** CD-ROM | disk | FTP | other *** search
- <!-- manual page source format generated by PolyglotMan v3.0.8+X.Org, -->
- <!-- available at http://polyglotman.sourceforge.net/ -->
-
- <html>
- <head>
- <title>"SDL_SetGammaRamp"("3") manual page</title>
- </head>
- <body bgcolor='#efefef' text='black' link='blue' vlink='#551A8B' alink='red'>
- <a href='#toc'>Table of Contents</a><p>
-
- <h2><a name='sect0' href='#toc0'>Name</a></h2>
- SDL_SetGammaRamp- Sets the color gamma lookup tables for the display
-
- <h2><a name='sect1' href='#toc1'>Synopsis</a></h2>
- <p>
- <b>#include "SDL.h" <p>
- </b><b>int <b>SDL_SetGammaRamp</b></b>(<b>Uint16 *redtable, Uint16 *greentable,
- Uint16 *bluetable</b>);
- <h2><a name='sect2' href='#toc2'>Description</a></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>
- This function adjusts the gamma based on lookup
- tables, you can also have the gamma calculated based on a "gamma function"
- parameter with <i>SDL_SetGamma</i>. <p>
- Not all display hardware is able to change
- gamma.
- <h2><a name='sect3' href='#toc3'>Return Value</a></h2>
- <p>
- Returns -1 on error (or if gamma adjustment is not supported).
-
- <h2><a name='sect4' href='#toc4'>See Also</a></h2>
- <p>
- <i>SDL_SetGamma</i> <i>SDL_GetGammaRamp</i>
- <!--
-
- <p>
-
- <hr><p>
- <a name='toc'><b>Table of Contents</b></a><p>
- <ul>
- <li><a name='toc0' href='#sect0'>Name</a></li>
- <li><a name='toc1' href='#sect1'>Synopsis</a></li>
- <li><a name='toc2' href='#sect2'>Description</a></li>
- <li><a name='toc3' href='#sect3'>Return Value</a></li>
- <li><a name='toc4' href='#sect4'>See Also</a></li>
- </ul>
- </body>
- </html>
-