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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">//</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">// Copyright 2005-2007 Adobe Systems Incorporated</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">// Copyright 2019 Mateusz Loskot &lt;mateusz at loskot dot net&gt;</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">//</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment">// Distributed under the Boost Software License, Version 1.0</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment">// See accompanying file LICENSE_1_0.txt or copy at</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment">// http://www.boost.org/LICENSE_1_0.txt</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment">//</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#ifndef BOOST_GIL_PIXEL_HPP</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#define BOOST_GIL_PIXEL_HPP</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span> </div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#include &lt;boost/gil/channel.hpp&gt;</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include &lt;boost/gil/color_base.hpp&gt;</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor">#include &lt;boost/gil/color_base_algorithm.hpp&gt;</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="preprocessor">#include &lt;boost/gil/concepts.hpp&gt;</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="preprocessor">#include &lt;boost/gil/metafunctions.hpp&gt;</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#include &lt;boost/gil/utilities.hpp&gt;</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#include &lt;boost/gil/detail/mp11.hpp&gt;</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> </div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="preprocessor">#include &lt;functional&gt;</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor">#include &lt;type_traits&gt;</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> </div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceboost.html">boost</a> { <span class="keyword">namespace </span>gil {</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> </div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="comment">// Forward-declare gray_t</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="keyword">struct </span>gray_color_t;</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="keyword">using </span>gray_t = mp11::mp_list&lt;gray_color_t&gt;;</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelBased&gt; <span class="keyword">struct </span>color_space_type;</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelBased&gt; <span class="keyword">struct </span>channel_mapping_type;</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelBased&gt; <span class="keyword">struct </span>channel_type;</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelBased&gt; <span class="keyword">struct </span>is_planar;</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> </div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelBased&gt;</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span><span class="keyword">struct </span>color_space_type&lt;PixelBased const&gt; : color_space_type&lt;PixelBased&gt; {};</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> </div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelBased&gt;</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span><span class="keyword">struct </span>channel_mapping_type&lt;PixelBased const&gt; : channel_mapping_type&lt;PixelBased&gt; {};</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> </div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelBased&gt;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span><span class="keyword">struct </span>channel_type&lt;PixelBased const&gt; : channel_type&lt;PixelBased&gt; {};</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelBased&gt;</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span><span class="keyword">struct </span>is_planar : std::false_type {};</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> </div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelBased&gt;</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span><span class="keyword">struct </span>is_planar&lt;PixelBased const&gt; : is_planar&lt;PixelBased&gt; {};</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> </div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt; <span class="keyword">struct </span>is_pixel : std::false_type {};</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt; <span class="keyword">struct </span>is_pixel&lt;T const&gt; : is_pixel&lt;T&gt; {};</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> </div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelBased&gt;</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1num__channels.html"> 54</a></span><span class="keyword">struct </span><a class="code hl_struct" href="structboost_1_1gil_1_1num__channels.html">num_channels</a> : mp11::mp_size&lt;typename color_space_type&lt;PixelBased&gt;::type&gt;::type {};</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> </div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> </div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> </div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout&gt;</div>
<div class="foldopen" id="foldopen00099" data-start="{" data-end="};">
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1pixel.html"> 99</a></span><span class="keyword">struct </span><a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a> :</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> detail::homogeneous_color_base</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> &lt;</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> ChannelValue,</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> Layout,</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> mp11::mp_size&lt;typename Layout::color_space_t&gt;::value</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> &gt;</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span>{</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span><span class="keyword">private</span>:</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> <span class="keyword">using </span>channel_t = ChannelValue;</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <span class="keyword">using </span>parent_t = detail::homogeneous_color_base</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> &lt;</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> ChannelValue,</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> Layout,</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> mp11::mp_size&lt;typename Layout::color_space_t&gt;::value</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> &gt;;</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span><span class="keyword">public</span>:</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> <span class="keyword">using </span><a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">value_type</a> = <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel&lt;ChannelValue, Layout&gt;</a>;</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> <span class="keyword">using </span><a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">reference</a> = <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">value_type</a>&amp;;</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <span class="keyword">using </span>const_reference = <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">value_type</a> <span class="keyword">const</span>&amp;;</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> <span class="keyword">static</span> <span class="keyword">constexpr</span> <span class="keywordtype">bool</span> is_mutable = channel_traits&lt;channel_t&gt;::is_mutable;</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> </div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>() = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> <span class="keyword">explicit</span> <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>(channel_t v) : parent_t(v) {} <span class="comment">// sets all channels to v</span></div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>(channel_t v0, channel_t v1) : parent_t(v0, v1) {}</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>(channel_t v0, channel_t v1, channel_t v2) : parent_t(v0, v1, v2) {}</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> </div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>(channel_t v0, channel_t v1, channel_t v2, channel_t v3)</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> : parent_t(v0, v1, v2, v3)</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> {}</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> </div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>(channel_t v0, channel_t v1, channel_t v2, channel_t v3, channel_t v4)</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> : parent_t(v0, v1, v2, v3, v4)</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> {}</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> </div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>(channel_t v0, channel_t v1, channel_t v2, channel_t v3, channel_t v4, channel_t v5)</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> : parent_t(v0, v1, v2, v3, v4, v5)</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> {}</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> </div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>(<span class="keyword">const</span> <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>&amp; p) : parent_t(p) {}</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> </div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>&amp; operator=(<a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a> <span class="keyword">const</span>&amp; p)</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> {</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> static_copy(p,*<span class="keyword">this</span>);</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> }</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> </div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> <span class="comment">// Construct from another compatible pixel type</span></div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>(Pixel <span class="keyword">const</span>&amp; p,</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> <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 id="l00150" name="l00150"></a><span class="lineno"> 150</span> : parent_t(p)</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> {</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> check_compatible&lt;Pixel&gt;();</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> }</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> </div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>&amp; operator=(Pixel <span class="keyword">const</span>&amp; p)</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> {</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> assign(p, is_pixel&lt;Pixel&gt;());</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> }</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> </div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> <span class="keywordtype">bool</span> operator==(Pixel <span class="keyword">const</span>&amp; p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> equal(p, is_pixel&lt;Pixel&gt;()); }</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> </div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> <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 id="l00167" name="l00167"></a><span class="lineno"> 167</span> </div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> <span class="comment">// homogeneous pixels have operator[]</span></div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> <span class="keyword">auto</span> operator[](std::size_t index)</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> -&gt; <span class="keyword">typename</span> channel_traits&lt;channel_t&gt;::reference</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> {</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> <span class="keywordflow">return</span> dynamic_at_c(*<span class="keyword">this</span>, index);</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> }</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> </div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> <span class="keyword">auto</span> operator[](std::size_t index) <span class="keyword">const</span></div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> -&gt; <span class="keyword">typename</span> channel_traits&lt;channel_t&gt;::const_reference</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> {</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> <span class="keywordflow">return</span> dynamic_at_c(*<span class="keyword">this</span>, index);</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> }</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> </div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span><span class="keyword">private</span>:</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> <span class="keywordtype">void</span> assign(Pixel <span class="keyword">const</span>&amp; p, std::true_type)</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> {</div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> check_compatible&lt;Pixel&gt;();</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> static_copy(p, *<span class="keyword">this</span>);</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> }</div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span> </div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> <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 id="l00191" name="l00191"></a><span class="lineno"> 191</span><span class="keyword"> </span>{</div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> check_compatible&lt;Pixel&gt;();</div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span> <span class="keywordflow">return</span> static_equal(*<span class="keyword">this</span>, p);</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> }</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span> </div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span> <span class="keywordtype">void</span> check_compatible()<span class="keyword"> const</span></div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span><span class="keyword"> </span>{</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> gil_function_requires&lt;PixelsCompatibleConcept&lt;Pixel, pixel&gt;&gt;();</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span> }</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> </div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span><span class="comment">// Support for assignment/equality comparison of a channel with a grayscale pixel</span></div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span> </div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span><span class="keyword">private</span>:</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span> <span class="keyword">static</span> <span class="keywordtype">void</span> check_gray()</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span> {</div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"> 207</span> <span class="keyword">static_assert</span>(std::is_same&lt;typename Layout::color_space_t, gray_t&gt;::value, <span class="stringliteral">&quot;&quot;</span>);</div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span> }</div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span> </div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span> <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Channel&gt;</div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span> <span class="keywordtype">void</span> assign(Channel <span class="keyword">const</span>&amp; channel, std::false_type)</div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span> {</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span> check_gray();</div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> gil::at_c&lt;0&gt;(*<span class="keyword">this</span>) = channel;</div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span> }</div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span> </div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span> <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Channel&gt;</div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span> <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 id="l00219" name="l00219"></a><span class="lineno"> 219</span><span class="keyword"> </span>{</div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno"> 220</span> check_gray();</div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"> 221</span> <span class="keywordflow">return</span> gil::at_c&lt;0&gt;(*<span class="keyword">this</span>) == channel;</div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span> }</div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span> </div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span><span class="keyword">public</span>:</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span> <a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>&amp; operator= (channel_t channel)</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span> {</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span> check_gray();</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span> gil::at_c&lt;0&gt;(*<span class="keyword">this</span>) = channel;</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span> <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> }</div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span> </div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span> <span class="keywordtype">bool</span> operator==(channel_t channel)<span class="keyword"> const</span></div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span><span class="keyword"> </span>{</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span> check_gray();</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span> <span class="keywordflow">return</span> gil::at_c&lt;0&gt;(*<span class="keyword">this</span>) == channel;</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span> }</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno"> 237</span>};</div>
</div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno"> 238</span> </div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno"> 240</span><span class="comment">// ColorBasedConcept</span></div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno"> 242</span> </div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno"> 243</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K&gt;</div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span><span class="keyword">struct </span>kth_element_type&lt;<a class="code hl_struct" href="structboost_1_1gil_1_1pixel.html">pixel</a>&lt;ChannelValue,Layout&gt;, K&gt;</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span>{</div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span> <span class="keyword">using </span>type = ChannelValue;</div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span>};</div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span> </div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K&gt;</div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span><span class="keyword">struct </span>kth_element_reference_type&lt;pixel&lt;ChannelValue,Layout&gt;, K&gt;</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span>{</div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span> <span class="keyword">using </span>type = <span class="keyword">typename</span> channel_traits&lt;ChannelValue&gt;::reference;</div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span>};</div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span> </div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K&gt;</div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span><span class="keyword">struct </span>kth_element_reference_type&lt;const pixel&lt;ChannelValue,Layout&gt;, K&gt;</div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span>{</div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"> 258</span> <span class="keyword">using </span>type = <span class="keyword">typename</span> channel_traits&lt;ChannelValue&gt;::const_reference;</div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span>};</div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"> 260</span> </div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"> 261</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K&gt;</div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span><span class="keyword">struct </span>kth_element_const_reference_type&lt;pixel&lt;ChannelValue,Layout&gt;, K&gt;</div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span>{</div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"> 264</span> <span class="keyword">using </span>type = <span class="keyword">typename</span> channel_traits&lt;ChannelValue&gt;::const_reference;</div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"> 265</span>};</div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span> </div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno"> 268</span><span class="comment">// PixelConcept</span></div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span> </div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout&gt;</div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"> 272</span><span class="keyword">struct </span>is_pixel&lt;pixel&lt;ChannelValue,Layout&gt;&gt; : std::true_type {};</div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno"> 273</span> </div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno"> 275</span><span class="comment">// HomogeneousPixelBasedConcept</span></div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"> 277</span> </div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"> 278</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout&gt;</div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"> 279</span><span class="keyword">struct </span>color_space_type&lt;pixel&lt;ChannelValue, Layout&gt;&gt;</div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"> 280</span>{</div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"> 281</span> <span class="keyword">using </span>type = <span class="keyword">typename</span> Layout::color_space_t;</div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span>};</div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span> </div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout&gt;</div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span><span class="keyword">struct </span>channel_mapping_type&lt;pixel&lt;ChannelValue, Layout&gt;&gt;</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span>{</div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span> <span class="keyword">using </span>type = <span class="keyword">typename</span> Layout::channel_mapping_t;</div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span>};</div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span> </div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout&gt;</div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"> 291</span><span class="keyword">struct </span>is_planar&lt;pixel&lt;ChannelValue, Layout&gt;&gt; : std::false_type {};</div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span> </div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout&gt;</div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno"> 294</span><span class="keyword">struct </span>channel_type&lt;pixel&lt;ChannelValue, Layout&gt;&gt;</div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"> 295</span>{</div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno"> 296</span> <span class="keyword">using </span>type = ChannelValue;</div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno"> 297</span>};</div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno"> 298</span> </div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno"> 299</span>}} <span class="comment">// namespace boost::gil</span></div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno"> 300</span> </div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno"> 301</span><span class="preprocessor">#endif</span></div>
<div class="ttc" id="anamespaceboost_html"><div class="ttname"><a href="namespaceboost.html">boost</a></div><div class="ttdoc">defined(BOOST_NO_CXX17_HDR_MEMORY_RESOURCE)</div><div class="ttdef"><b>Definition</b> algorithm.hpp:36</div></div>
<div class="ttc" id="astructboost_1_1gil_1_1num__channels_html"><div class="ttname"><a href="structboost_1_1gil_1_1num__channels.html">boost::gil::num_channels</a></div><div class="ttdoc">Returns the number of channels of a pixel-based GIL construct.</div><div class="ttdef"><b>Definition</b> pixel.hpp:54</div></div>
<div class="ttc" id="astructboost_1_1gil_1_1pixel_html"><div class="ttname"><a href="structboost_1_1gil_1_1pixel.html">boost::gil::pixel</a></div><div class="ttdoc">Represents a pixel value (a container of channels). Models: HomogeneousColorBaseValueConcept,...</div><div class="ttdef"><b>Definition</b> pixel.hpp:106</div></div>
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