boost-react-native-bundle
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<TITLE>Generic Image Library: color_element_type, color_element_reference_type, color_element_const_reference_type, get_color, contains_color</TITLE>
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<h1>color_element_type, color_element_reference_type, color_element_const_reference_type, get_color, contains_color<br>
<small>
[<a class="el" href="g_i_l_0105.html">Algorithms and Utility Functions</a>]</small>
</h1><hr><a name="_details"></a><h2>Detailed Description</h2>
Support for accessing the elements of a color base by color name.
<p>
get_color: Named channel accessors<p>
Example: A function that takes a generic <a class="el" href="g_i_l_0599.html" title="Represents a pixel value (a container of channels). Models: HomogeneousColorBaseValueConcept...">pixel</a> containing a red channel and sets it to 100%:<p>
<div class="fragment"><pre class="fragment"><span class="keyword">template</span> <<span class="keyword">typename</span> Pixel>
<span class="keywordtype">void</span> set_red_to_max(Pixel& pixel) {
boost::function_requires<MutablePixelConcept<Pixel> >();
BOOST_STATIC_ASSERT((contains_color<Pixel, red_t>::value));
<span class="keyword">typedef</span> <span class="keyword">typename</span> color_element_type<Pixel, red_t>::type red_channel_t;
<a class="code" href="g_i_l_0106.html#gab1205781ba628ca806c47a51f40f5f6" title="Mutable accessor to the element associated with a given color name.">get_color</a>(pixel, red_t()) = channel_traits<red_channel_t>::max_value();
}
</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_0447.html">contains_color</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">A predicate metafunction determining whether a given color base contains a given color. <a href="g_i_l_0447.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_0444.html">color_element_type</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specifies the type of the element associated with a given color tag. <a href="g_i_l_0444.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_0442.html">color_element_reference_type</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specifies the return type of the mutable element accessor by color name, get_color(color_base, Color());. <a href="g_i_l_0442.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_0440.html">color_element_const_reference_type</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Specifies the return type of the constant element accessor by color name, get_color(color_base, Color());. <a href="g_i_l_0440.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="gab1205781ba628ca806c47a51f40f5f6"></a><!-- doxytag: member="ColorBaseAlgorithmColor::get_color" ref="gab1205781ba628ca806c47a51f40f5f6" args="(ColorBase &cb, Color=Color())" -->
template<typename ColorBase, typename Color> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">color_element_reference_type<br>
< ColorBase, Color >::type </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="g_i_l_0106.html#gab1205781ba628ca806c47a51f40f5f6">get_color</a> (ColorBase &cb, Color=Color())</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Mutable accessor to the element associated with a given color name. <br></td></tr>
<tr><td class="memTemplParams" nowrap colspan="2"><a class="anchor" name="g4b9fe0ec8239047ac50842800de872b9"></a><!-- doxytag: member="ColorBaseAlgorithmColor::get_color" ref="g4b9fe0ec8239047ac50842800de872b9" args="(const ColorBase &cb, Color=Color())" -->
template<typename ColorBase, typename Color> </td></tr>
<tr><td class="memTemplItemLeft" nowrap align="right" valign="top">color_element_const_reference_type<br>
< ColorBase, Color >::type </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="g_i_l_0106.html#g4b9fe0ec8239047ac50842800de872b9">get_color</a> (const ColorBase &cb, Color=Color())</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Constant accessor to the element associated with a given color name. <br></td></tr>
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