libs/gil/doc/html/reference/packed__pixel_8hpp_source.html

   1 <!-- HTML header for doxygen 1.8.13-->
   2 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
   3 <html xmlns="http://www.w3.org/1999/xhtml">
   4   <head>
   5     <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
   6     <meta http-equiv="X-UA-Compatible" content="IE=9"/>
   7     <meta name="generator" content="Doxygen 1.8.15"/>
   8     <meta name="viewport" content="width=device-width, initial-scale=1"/>
   9     <title>Generic Image Library: packed_pixel.hpp Source File</title>
  10     <link href="tabs.css" rel="stylesheet" type="text/css"/>
  11     <script type="text/javascript" src="jquery.js"></script>
  12     <script type="text/javascript" src="dynsections.js"></script>
  13     <link href="doxygen.css" rel="stylesheet" type="text/css" />
  14     <link href="doxygen-boost.css" rel="stylesheet" type="text/css"/>
  15   </head>
  16   <body>
  17     <div class="boost-header">
  18       <table border="0" cellpadding="7" cellspacing="0" width="100%" summary="header">
  19         <tr>
  20           <td valign="top" width="300">
  21             <h3><a href="../index.html"><img alt="Boost GIL" src="../_static/gil.png" border="0"></a></h3>
  22           </td>
  23           <td ><h1 align="center"><a href="../index.html"></a></h1></td>
  24           <td></td>
  25         </tr>
  26       </table>
  27     </div>
  28     <hr/>
  29     <div id="top"><!-- do not remove this div, it is closed by doxygen! -->
  30 <!-- Generated by Doxygen 1.8.15 -->
  31 <script type="text/javascript" src="menudata.js"></script>
  32 <script type="text/javascript" src="menu.js"></script>
  33 <script type="text/javascript">
  34 /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&amp;dn=gpl-2.0.txt GPL-v2 */
  35 $(function() {
  36   initMenu('',false,false,'search.php','Search');
  37 });
  38 /* @license-end */</script>
  39 <div id="main-nav"></div>
  40 <div id="nav-path" class="navpath">
  41   <ul>
  42 <li class="navelem"><a class="el" href="dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a class="el" href="dir_1878a3f4746a95c6aad317458cc7ef80.html">boost</a></li><li class="navelem"><a class="el" href="dir_df4750f408086f9b9c1b5ee4251365ff.html">gil</a></li>  </ul>
  43 </div>
  44 </div><!-- top -->
  45 <div class="header">
  46   <div class="headertitle">
  47 <div class="title">packed_pixel.hpp</div>  </div>
  48 </div><!--header-->
  49 <div class="contents">
  50 <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">// Copyright 2005-2007 Adobe Systems Incorporated</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">// Distributed under the Boost Software License, Version 1.0</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">// See accompanying file LICENSE_1_0.txt or copy at</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">// http://www.boost.org/LICENSE_1_0.txt</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="preprocessor">#ifndef BOOST_GIL_PACKED_PIXEL_HPP</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor">#define BOOST_GIL_PACKED_PIXEL_HPP</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;</div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#include &lt;boost/gil/pixel.hpp&gt;</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &lt;boost/gil/detail/mp11.hpp&gt;</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;</div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &lt;functional&gt;</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor">#include &lt;type_traits&gt;</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {</div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;</div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> BitField, <span class="keyword">typename</span> ChannelRefs, <span class="keyword">typename</span> Layout&gt;</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="keyword">struct </span>packed_pixel</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;{</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    BitField _bitfield{0}; <span class="comment">// TODO: Make private</span></div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    <span class="keyword">using</span> layout_t = Layout;</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    <span class="keyword">using</span> value_type = packed_pixel&lt;BitField, ChannelRefs, Layout&gt;;</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    <span class="keyword">using</span> reference = value_type&amp;;</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    <span class="keyword">using</span> const_reference = value_type <span class="keyword">const</span>&amp;;</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> is_mutable =</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;        channel_traits&lt;mp11::mp_front&lt;ChannelRefs&gt;&gt;::is_mutable;</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;    packed_pixel() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    <span class="keyword">explicit</span> packed_pixel(<span class="keyword">const</span> BitField&amp; bitfield) : _bitfield(bitfield) {}</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;    <span class="comment">// Construct from another compatible pixel type</span></div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;    packed_pixel(<span class="keyword">const</span> packed_pixel&amp; p) : _bitfield(p._bitfield) {}</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    packed_pixel(Pixel <span class="keyword">const</span>&amp; p,</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;        <span class="keyword">typename</span> std::enable_if&lt;is_pixel&lt;Pixel&gt;::value&gt;::type* <span class="comment">/*dummy*/</span> = <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;    {</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;        check_compatible&lt;Pixel&gt;();</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;        static_copy(p, *<span class="keyword">this</span>);</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    }</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;    packed_pixel(<span class="keywordtype">int</span> chan0, <span class="keywordtype">int</span> chan1)</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;        : _bitfield(0)</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    {</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;        static_assert(num_channels&lt;packed_pixel&gt;::value == 2, <span class="stringliteral">&quot;&quot;</span>);</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;        gil::at_c&lt;0&gt;(*<span class="keyword">this</span>) = chan0; gil::at_c&lt;1&gt;(*<span class="keyword">this</span>) = chan1;</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;    }</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    packed_pixel(<span class="keywordtype">int</span> chan0, <span class="keywordtype">int</span> chan1, <span class="keywordtype">int</span> chan2)</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;        : _bitfield(0)</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    {</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;        static_assert(num_channels&lt;packed_pixel&gt;::value == 3, <span class="stringliteral">&quot;&quot;</span>);</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;        gil::at_c&lt;0&gt;(*<span class="keyword">this</span>) = chan0;</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;        gil::at_c&lt;1&gt;(*<span class="keyword">this</span>) = chan1;</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;        gil::at_c&lt;2&gt;(*<span class="keyword">this</span>) = chan2;</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;    }</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;    packed_pixel(<span class="keywordtype">int</span> chan0, <span class="keywordtype">int</span> chan1, <span class="keywordtype">int</span> chan2, <span class="keywordtype">int</span> chan3)</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;        : _bitfield(0)</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;    {</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;        static_assert(num_channels&lt;packed_pixel&gt;::value == 4, <span class="stringliteral">&quot;&quot;</span>);</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;        gil::at_c&lt;0&gt;(*<span class="keyword">this</span>) = chan0;</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;        gil::at_c&lt;1&gt;(*<span class="keyword">this</span>) = chan1;</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;        gil::at_c&lt;2&gt;(*<span class="keyword">this</span>) = chan2;</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;        gil::at_c&lt;3&gt;(*<span class="keyword">this</span>) = chan3;</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    }</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;</div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;    packed_pixel(<span class="keywordtype">int</span> chan0, <span class="keywordtype">int</span> chan1, <span class="keywordtype">int</span> chan2, <span class="keywordtype">int</span> chan3, <span class="keywordtype">int</span> chan4)</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;        : _bitfield(0)</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;    {</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;        static_assert(num_channels&lt;packed_pixel&gt;::value == 5, <span class="stringliteral">&quot;&quot;</span>);</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;        gil::at_c&lt;0&gt;(*<span class="keyword">this</span>) = chan0;</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;        gil::at_c&lt;1&gt;(*<span class="keyword">this</span>) = chan1;</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;        gil::at_c&lt;2&gt;(*<span class="keyword">this</span>) = chan2;</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;        gil::at_c&lt;3&gt;(*<span class="keyword">this</span>) = chan3;</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;        gil::at_c&lt;4&gt;(*<span class="keyword">this</span>) = chan4;</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;    }</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;    <span class="keyword">auto</span> operator=(packed_pixel <span class="keyword">const</span>&amp; p) -&gt; packed_pixel&amp;</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    {</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;        _bitfield = p._bitfield;</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;        <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;    }</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    <span class="keyword">auto</span> operator=(Pixel <span class="keyword">const</span>&amp; p) -&gt; packed_pixel&amp;</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    {</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;        assign(p, is_pixel&lt;Pixel&gt;());</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;        <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;    }</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;    <span class="keywordtype">bool</span> operator==(Pixel <span class="keyword">const</span>&amp; p)<span class="keyword"> const</span></div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;<span class="keyword">    </span>{</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;        <span class="keywordflow">return</span> equal(p, is_pixel&lt;Pixel&gt;());</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;    }</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;</div><div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    <span class="keywordtype">bool</span> operator!=(Pixel <span class="keyword">const</span>&amp; p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> !(*<span class="keyword">this</span>==p); }</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;</div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;<span class="keyword">private</span>:</div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">void</span> check_compatible()</div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;    {</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;        gil_function_requires&lt;PixelsCompatibleConcept&lt;Pixel, packed_pixel&gt;&gt;();</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    }</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    <span class="keywordtype">void</span> assign(Pixel <span class="keyword">const</span>&amp; p, std::true_type)</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;    {</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;        check_compatible&lt;Pixel&gt;();</div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;        static_copy(p, *<span class="keyword">this</span>);</div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;    }</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;</div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;    <span class="keywordtype">bool</span>  equal(Pixel <span class="keyword">const</span>&amp; p, std::true_type)<span class="keyword"> const</span></div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;<span class="keyword">    </span>{</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;        check_compatible&lt;Pixel&gt;();</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;        <span class="keywordflow">return</span> static_equal(*<span class="keyword">this</span>, p);</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;    }</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;</div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;    <span class="comment">// Support for assignment/equality comparison of a channel with a grayscale pixel</span></div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">void</span> check_gray()</div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    {</div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;        static_assert(std::is_same&lt;typename Layout::color_space_t, gray_t&gt;::value, <span class="stringliteral">&quot;&quot;</span>);</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;    }</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;</div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Channel&gt;</div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;    <span class="keywordtype">void</span> assign(Channel <span class="keyword">const</span>&amp; channel, std::false_type)</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;    {</div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;        check_gray();</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;        gil::at_c&lt;0&gt;(*<span class="keyword">this</span>) = channel;</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;    }</div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Channel&gt;</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;    <span class="keywordtype">bool</span> equal (Channel <span class="keyword">const</span>&amp; channel, std::false_type)<span class="keyword"> const</span></div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;<span class="keyword">    </span>{</div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;        check_gray();</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;        <span class="keywordflow">return</span> gil::at_c&lt;0&gt;(*<span class="keyword">this</span>) == channel;</div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;    }</div><div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;    <span class="keyword">auto</span> operator=(<span class="keywordtype">int</span> channel) -&gt; packed_pixel&amp;</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;    {</div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;        check_gray();</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;        gil::at_c&lt;0&gt;(*<span class="keyword">this</span>) = channel;</div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;        <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    }</div><div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;</div><div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;    <span class="keywordtype">bool</span> operator==(<span class="keywordtype">int</span> channel)<span class="keyword"> const</span></div><div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;<span class="keyword">    </span>{</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;        check_gray();</div><div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;        <span class="keywordflow">return</span> gil::at_c&lt;0&gt;(*<span class="keyword">this</span>) == channel;</div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;    }</div><div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;};</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;</div><div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;<span class="comment">//  ColorBasedConcept</span></div><div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> BitField, <span class="keyword">typename</span> ChannelRefs, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K&gt;</div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;<span class="keyword">struct </span>kth_element_type&lt;packed_pixel&lt;BitField, ChannelRefs, Layout&gt;, K&gt;</div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;{</div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;    <span class="keyword">using</span> type = <span class="keyword">typename</span> channel_traits&lt;mp11::mp_at_c&lt;ChannelRefs, K&gt;&gt;::value_type;</div><div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;};</div><div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;</div><div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> BitField, <span class="keyword">typename</span> ChannelRefs, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K&gt;</div><div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;<span class="keyword">struct </span>kth_element_reference_type&lt;packed_pixel&lt;BitField, ChannelRefs, Layout&gt;, K&gt;</div><div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;{</div><div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;    <span class="keyword">using</span> type = <span class="keyword">typename</span> channel_traits&lt;mp11::mp_at_c&lt;ChannelRefs, K&gt;&gt;::reference;</div><div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;};</div><div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;</div><div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> BitField, <span class="keyword">typename</span> ChannelRefs, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K&gt;</div><div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;<span class="keyword">struct </span>kth_element_const_reference_type&lt;packed_pixel&lt;BitField, ChannelRefs, Layout&gt;, K&gt;</div><div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;{</div><div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;    <span class="keyword">using</span> type = <span class="keyword">typename</span> channel_traits&lt;mp11::mp_at_c&lt;ChannelRefs, K&gt;&gt;::const_reference;</div><div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;};</div><div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;</div><div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;<span class="keyword">template</span> &lt;<span class="keywordtype">int</span> K, <span class="keyword">typename</span> P, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L&gt;</div><div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;<span class="keyword">inline</span></div><div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;<span class="keyword">auto</span> <a class="code" href="group___color_base_model_homogeneous.html#gae2eaf5eecbad94d7dc6432b8f759fba0">at_c</a>(packed_pixel&lt;P, C, L&gt;&amp; p)</div><div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;    -&gt; <span class="keyword">typename</span> kth_element_reference_type&lt;packed_pixel&lt;P, C, L&gt;, K&gt;::type</div><div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;{</div><div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">typename</span> kth_element_reference_type</div><div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;        &lt;</div><div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;            packed_pixel&lt;P, C, L&gt;,</div><div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;            K</div><div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;        &gt;::type{&amp;p._bitfield};</div><div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;}</div><div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;</div><div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;<span class="keyword">template</span> &lt;<span class="keywordtype">int</span> K, <span class="keyword">typename</span> P, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L&gt;</div><div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;<span class="keyword">inline</span></div><div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;<span class="keyword">auto</span> <a class="code" href="group___color_base_model_homogeneous.html#gae2eaf5eecbad94d7dc6432b8f759fba0">at_c</a>(<span class="keyword">const</span> packed_pixel&lt;P, C, L&gt;&amp; p)</div><div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;    -&gt; <span class="keyword">typename</span> kth_element_const_reference_type&lt;packed_pixel&lt;P, C, L&gt;, K&gt;::type</div><div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;{</div><div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">typename</span> kth_element_const_reference_type</div><div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;        &lt;</div><div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;            packed_pixel&lt;P, C, L&gt;,</div><div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;        K&gt;::type{&amp;p._bitfield};</div><div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;}</div><div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;</div><div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;<span class="comment">//  PixelConcept</span></div><div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;<span class="comment">// Metafunction predicate that flags packed_pixel as a model of PixelConcept. Required by PixelConcept</span></div><div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> BitField, <span class="keyword">typename</span> ChannelRefs, <span class="keyword">typename</span> Layout&gt;</div><div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;<span class="keyword">struct </span>is_pixel&lt;packed_pixel&lt;BitField, ChannelRefs, Layout&gt;&gt; : std::true_type {};</div><div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;</div><div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;<span class="comment">//  PixelBasedConcept</span></div><div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> P, <span class="keyword">typename</span> C, <span class="keyword">typename</span> Layout&gt;</div><div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;<span class="keyword">struct </span>color_space_type&lt;packed_pixel&lt;P, C, Layout&gt;&gt;</div><div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;{</div><div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;    <span class="keyword">using</span> type = <span class="keyword">typename</span> Layout::color_space_t;</div><div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;};</div><div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;</div><div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> P, <span class="keyword">typename</span> C, <span class="keyword">typename</span> Layout&gt;</div><div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;<span class="keyword">struct </span>channel_mapping_type&lt;packed_pixel&lt;P, C, Layout&gt;&gt;</div><div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;{</div><div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;    <span class="keyword">using</span> type = <span class="keyword">typename</span> Layout::channel_mapping_t;</div><div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;};</div><div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;</div><div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> P, <span class="keyword">typename</span> C, <span class="keyword">typename</span> Layout&gt;</div><div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;<span class="keyword">struct </span>is_planar&lt;packed_pixel&lt;P, C, Layout&gt;&gt; : std::false_type {};</div><div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;</div><div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;</div><div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;</div><div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> P, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L&gt;</div><div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;<span class="keyword">struct </span>iterator_is_mutable&lt;packed_pixel&lt;P, C, L&gt;*&gt;</div><div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;    : std::integral_constant&lt;bool, packed_pixel&lt;P, C, L&gt;::is_mutable&gt;</div><div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;{};</div><div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;</div><div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> P, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L&gt;</div><div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;<span class="keyword">struct </span>iterator_is_mutable&lt;const packed_pixel&lt;P, C, L&gt;*&gt; : std::false_type {};</div><div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;</div><div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;}}  <span class="comment">// namespace boost::gil</span></div><div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;</div><div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;<span class="preprocessor">#endif</span></div><div class="ttc" id="group___color_base_model_homogeneous_html_gae2eaf5eecbad94d7dc6432b8f759fba0"><div class="ttname"><a href="group___color_base_model_homogeneous.html#gae2eaf5eecbad94d7dc6432b8f759fba0">boost::gil::at_c</a></div><div class="ttdeci">auto at_c(detail::homogeneous_color_base&lt; E, L, N &gt; &amp;p) -&gt; typename std::add_lvalue_reference&lt; E &gt;::type</div><div class="ttdoc">Provides mutable access to the K-th element, in physical order.</div><div class="ttdef"><b>Definition:</b> color_base.hpp:597</div></div>
  51 </div><!-- fragment --></div><!-- contents -->
  52      <!-- HTML footer for doxygen 1.8.13-->
  53      <!-- start footer part -->
  54      <hr class="footer"/>
  55      <address class="footer">
  56       <small>
  57         Generated by &#160;<a href="http://www.doxygen.org/index.html">doxygen</a> 1.8.15
  58       </small>
  59     </address>
  60   </body>
  61 </html>