<!-- Copyright 2008 Lubomir Bourdev and Hailin Jin Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) --> <!-- Copyright 2005-2007 Adobe Systems Incorporated Distributed under the MIT License (see accompanying file LICENSE_1_0_0.txt or a copy at http://stlab.adobe.com/licenses.html) Some files are held under additional license. Please see "http://stlab.adobe.com/licenses.html" for more information. --> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"> <head> <TITLE>Generic Image Library: channel_multiply</TITLE> <META HTTP-EQUIV="content-type" CONTENT="text/html;charset=ISO-8859-1"/> <LINK TYPE="text/css" REL="stylesheet" HREF="adobe_source.css"/> </head> <body> <table border="0" cellspacing="0" cellpadding="0" style='width: 100%; margin: 0; padding: 0'><tr> <td width="100%" valign="top" style='padding-left: 10px; padding-right: 10px; padding-bottom: 10px'> <div class="qindex"><a class="qindex" href="index.html">Modules</a> | <a class="qindex" href="classes.html">Alphabetical List</a> | <a class="qindex" href="annotated.html">Class List</a> | <a class="qindex" href="dirs.html">Directories</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="../index.html">GIL Home Page</a> </div> <!-- End Header --> <!-- Generated by Doxygen 1.5.6 --> <div class="contents"> <h1>channel_multiply<br> <small> [<a class="el" href="g_i_l_0097.html">Algorithms and Utility Functions</a>]</small> </h1><hr><a name="_details"></a><h2>Detailed Description</h2> Multiplying unsigned channel values of the same type. Performs scaled multiplication result = a * b / max_value. <p> Example: <div class="fragment"><pre class="fragment">bits8 x=128; bits8 y=128; bits8 mul = <a class="code" href="g_i_l_0103.html#gf73b2a47a7877767534df0eee46dda17" title="A function multiplying two channels. result = a * b / max_value.">channel_multiply</a>(x,y); assert(mul == 64); <span class="comment">// 64 = 128 * 128 / 255</span> </pre></div> <p> <table border="0" cellpadding="0" cellspacing="0"> <tr><td></td></tr> <tr><td colspan="2"><br><h2>Classes</h2></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="g_i_l_0422.html">channel_multiplier_unsigned</a></td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">This is the default implementation. Performance specializatons are provided. <a href="g_i_l_0422.html#_details">More...</a><br></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="g_i_l_0428.html">channel_multiplier_unsigned< bits8 ></a></td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization of channel_multiply for 8-bit unsigned channels. <a href="g_i_l_0428.html#_details">More...</a><br></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="g_i_l_0424.html">channel_multiplier_unsigned< bits16 ></a></td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization of channel_multiply for 16-bit unsigned channels. <a href="g_i_l_0424.html#_details">More...</a><br></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="g_i_l_0426.html">channel_multiplier_unsigned< bits32f ></a></td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">Specialization of channel_multiply for float 0..1 channels. <a href="g_i_l_0426.html#_details">More...</a><br></td></tr> <tr><td class="memItemLeft" nowrap align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="g_i_l_0420.html">channel_multiplier</a></td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">A function object to multiply two channels. result = a * b / max_value. <a href="g_i_l_0420.html#_details">More...</a><br></td></tr> <tr><td colspan="2"><br><h2>Functions</h2></td></tr> <tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="gf73b2a47a7877767534df0eee46dda17"></a><!-- doxytag: member="ChannelMultiplyAlgorithm::channel_multiply" ref="gf73b2a47a7877767534df0eee46dda17" args="(Channel a, Channel b)" --> template<typename Channel> </td></tr> <tr><td class="memTemplItemLeft" nowrap align="right" valign="top">channel_traits< Channel ><br> ::value_type </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="g_i_l_0103.html#gf73b2a47a7877767534df0eee46dda17">channel_multiply</a> (Channel a, Channel b)</td></tr> <tr><td class="mdescLeft"> </td><td class="mdescRight">A function multiplying two channels. result = a * b / max_value. <br></td></tr> </table> </div> <hr size="1"><address style="text-align: right;"><small>Generated on Sat May 2 13:50:17 2009 for Generic Image Library by <a href="http://www.doxygen.org/index.html"> <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.6 </small></address> </body> </html>