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| <TITLE>Generic Image Library: scoped_channel_value</TITLE> |
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| <h1>scoped_channel_value<br> |
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| [<a class="el" href="g_i_l_0102.html">Models</a>]</small> |
| </h1><hr><a name="_details"></a><h2>Detailed Description</h2> |
| A channel adaptor that modifies the range of the source channel. Models: <a class="el" href="g_i_l_0270.html" title="A channel that supports default construction.">ChannelValueConcept</a>. |
| <p> |
| Example: <div class="fragment"><pre class="fragment"><span class="comment">// Create a double channel with range [-0.5 .. 0.5]</span> |
| <span class="keyword">struct </span>double_minus_half { <span class="keyword">static</span> <span class="keywordtype">double</span> apply() { <span class="keywordflow">return</span> -0.5; } }; |
| <span class="keyword">struct </span>double_plus_half { <span class="keyword">static</span> <span class="keywordtype">double</span> apply() { <span class="keywordflow">return</span> 0.5; } }; |
| <span class="keyword">typedef</span> scoped_channel_value<double, double_minus_half, double_plus_half> bits64custom_t; |
| |
| <span class="comment">// channel_convert its maximum should map to the maximum</span> |
| bits64custom_t x = channel_traits<bits64custom_t>::max_value(); |
| assert(x == 0.5); |
| bits16 y = channel_convert<bits16>(x); |
| assert(y == 65535); |
| </pre></div> |
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| <tr><td class="memItemLeft" nowrap align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="g_i_l_0620.html">scoped_channel_value</a></td></tr> |
| |
| <tr><td class="mdescLeft"> </td><td class="mdescRight">A channel adaptor that modifies the range of the source channel. Models: <a class="el" href="g_i_l_0270.html" title="A channel that supports default construction.">ChannelValueConcept</a>. <a href="g_i_l_0620.html#_details">More...</a><br></td></tr> |
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