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<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 2007-2008 Christian Henning, Andreas Pokorny, Lubomir Bourdev</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_IO_BIT_OPERATIONS_HPP</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor">#define BOOST_GIL_IO_BIT_OPERATIONS_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/io/typedefs.hpp&gt;</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;</div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &lt;array&gt;</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &lt;cstddef&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 { <span class="keyword">namespace </span>detail {</div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment">// 1110 1100 -&gt; 0011 0111</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Buffer, <span class="keyword">typename</span> IsBitAligned&gt;</div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="keyword">struct </span>mirror_bits</div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;{</div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;    mirror_bits(<span class="keywordtype">bool</span>) {};</div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;</div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;    <span class="keywordtype">void</span> operator()(Buffer&amp;) {}</div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;    <span class="keywordtype">void</span> operator()(byte_t*, std::size_t){}</div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;};</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;</div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment">// The functor will generate a lookup table since the</span></div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="comment">// mirror operation is quite costly.</span></div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Buffer&gt;</div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="keyword">struct </span>mirror_bits&lt;Buffer, std::true_type&gt;</div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;{</div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    mirror_bits(<span class="keywordtype">bool</span> <a class="code" href="group___variant.html#ga82b387581cf015301eaed7798304e367">apply_operation</a> = <span class="keyword">true</span>)</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;        : apply_operation_(<a class="code" href="group___variant.html#ga82b387581cf015301eaed7798304e367">apply_operation</a>)</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    {</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;        <span class="keywordflow">if</span>(apply_operation_)</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;        {</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;            byte_t i = 0;</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;            <span class="keywordflow">do</span></div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;            {</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;                lookup_[i] = mirror(i);</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;            }</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;            <span class="keywordflow">while</span> (i++ != 255);</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;        }</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;   }</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    <span class="keywordtype">void</span> operator()(Buffer&amp; buffer)</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;    {</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;        <span class="keywordflow">if</span> (apply_operation_)</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;            for_each(buffer.begin(), buffer.end(), [<span class="keyword">this</span>](byte_t&amp; c) { lookup(c); });</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;</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    <span class="keywordtype">void</span> operator()(byte_t *dst, std::size_t size)</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    {</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;        <span class="keywordflow">for</span> (std::size_t i = 0; i &lt; size; ++i)</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;            lookup(*dst);</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;            ++dst;</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;    }</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="keyword">private</span>:</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;    <span class="keywordtype">void</span> lookup(byte_t&amp; c)</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;        c = lookup_[c];</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    }</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;    <span class="keyword">static</span> byte_t mirror(byte_t c)</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;    {</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;        byte_t result = 0;</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;        <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; 8; ++i)</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;            result = result &lt;&lt; 1;</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;            result |= (c &amp; 1);</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;            c = c &gt;&gt; 1;</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;        }</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;        <span class="keywordflow">return</span> result;</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;</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;    std::array&lt;byte_t, 256&gt; lookup_;</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    <span class="keywordtype">bool</span> apply_operation_;</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;};</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;<span class="comment">// 0011 1111 -&gt; 1100 0000</span></div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Buffer, <span class="keyword">typename</span> IsBitAligned&gt;</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;<span class="keyword">struct </span>negate_bits</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;{</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;    <span class="keywordtype">void</span> operator()(Buffer&amp;) {};</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;</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Buffer&gt;</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;<span class="keyword">struct </span>negate_bits&lt;Buffer, std::true_type&gt;</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;{</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;    <span class="keywordtype">void</span> operator()(Buffer&amp; buffer)</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;        for_each(buffer.begin(), buffer.end(),</div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;            negate_bits&lt;Buffer, std::true_type&gt;::negate);</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;    }</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;    <span class="keywordtype">void</span> operator()(byte_t* dst, std::size_t size)</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    {</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;        <span class="keywordflow">for</span> (std::size_t i = 0; i &lt; size; ++i)</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;        {</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;            negate(*dst);</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;            ++dst;</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;</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;<span class="keyword">private</span>:</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">void</span> negate(byte_t&amp; b)</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;        b = ~b;</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    }</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;};</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;<span class="comment">// 11101100 -&gt; 11001110</span></div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Buffer, <span class="keyword">typename</span> IsBitAligned&gt;</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;<span class="keyword">struct </span>swap_half_bytes</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="keywordtype">void</span> operator()(Buffer&amp;) {};</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;};</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Buffer&gt;</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;<span class="keyword">struct </span>swap_half_bytes&lt;Buffer, std::true_type&gt;</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="keywordtype">void</span> operator()(Buffer&amp; buffer)</div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    {</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;        for_each(buffer.begin(), buffer.end(),</div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;            <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap_half_bytes&lt;Buffer, std::true_type&gt;::swap</a>);</div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;    }</div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;</div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;    <span class="keywordtype">void</span> operator()(byte_t* dst, std::size_t size)</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    {</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;        <span class="keywordflow">for</span> (std::size_t i = 0; i &lt; size; ++i)</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;            <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(*dst);</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;            ++dst;</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;    }</div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;</div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;<span class="keyword">private</span>:</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">static</span> <span class="keywordtype">void</span> <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(byte_t&amp; c)</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;    {</div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;        c = ((c &lt;&lt; 4) &amp; 0xF0) | ((c &gt;&gt; 4) &amp; 0x0F);</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;    }</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;};</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;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Buffer&gt;</div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;<span class="keyword">struct </span>do_nothing</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;{</div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;   do_nothing() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;   <span class="keywordtype">void</span> operator()(Buffer&amp;) {}</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;</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;<span class="keyword">inline</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> trailing_zeros(T x) noexcept</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;{</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;    <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> n = 0;</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;    x = ~x &amp; (x - 1);</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;    <span class="keywordflow">while</span> (x)</div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    {</div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;        n = n + 1;</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;        x = x &gt;&gt; 1;</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="keywordflow">return</span> n;</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;}</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;<span class="keyword">inline</span></div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> count_ones(T x) noexcept</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">unsigned</span> <span class="keywordtype">int</span> n = 0;</div><div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;    <span class="keywordflow">while</span> (x)</div><div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;    {</div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;        <span class="comment">// clear the least significant bit set</span></div><div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;        x &amp;= x - 1;</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;        ++n;</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;    }</div><div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;</div><div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;    <span class="keywordflow">return</span> n;</div><div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;}</div><div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;</div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;}}} <span class="comment">// namespace boost::gil::detail</span></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="preprocessor">#endif</span></div><div class="ttc" id="group___variant_html_ga82b387581cf015301eaed7798304e367"><div class="ttname"><a href="group___variant.html#ga82b387581cf015301eaed7798304e367">boost::gil::apply_operation</a></div><div class="ttdeci">BOOST_FORCEINLINE auto apply_operation(variant&lt; Types &gt; &amp;arg, UnaryOp op)</div><div class="ttdoc">Invokes a generic mutable operation (represented as a unary function object) on a variant.</div><div class="ttdef"><b>Definition:</b> apply_operation.hpp:33</div></div>
<div class="ttc" id="group___packed_channel_reference_model_html_ga70de3c85964650c16afcc42c02bd5df9"><div class="ttname"><a href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">std::swap</a></div><div class="ttdeci">void swap(boost::gil::packed_channel_reference&lt; BF, FB, NB, M &gt; const x, R &amp;y)</div><div class="ttdoc">swap for packed_channel_reference</div><div class="ttdef"><b>Definition:</b> channel.hpp:529</div></div>
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