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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 2005-2007 Adobe Systems Incorporated</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">// Copyright 2019 Mateusz Loskot &lt;mateusz at loskot dot net&gt;</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">// Distributed under the Boost Software License, Version 1.0</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">// See accompanying file LICENSE_1_0.txt or copy at</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">// http://www.boost.org/LICENSE_1_0.txt</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor">#ifndef BOOST_GIL_BIT_ALIGNED_PIXEL_REFERENCE_HPP</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#define BOOST_GIL_BIT_ALIGNED_PIXEL_REFERENCE_HPP</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;</div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &lt;boost/gil/pixel.hpp&gt;</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &lt;boost/gil/channel.hpp&gt;</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &lt;boost/gil/detail/mp11.hpp&gt;</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;</div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor">#include &lt;boost/assert.hpp&gt;</span></div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#include &lt;boost/config.hpp&gt;</span></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="preprocessor">#include &lt;functional&gt;</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor">#include &lt;type_traits&gt;</span></div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;</div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {</div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;</div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment">//  bit_range</span></div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="comment">//  Represents a range of bits that can span multiple consecutive bytes. The range has a size fixed at compile time, but the offset is specified at run time.</span></div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="keyword">template</span> &lt;<span class="keywordtype">int</span> RangeSize, <span class="keywordtype">bool</span> IsMutable&gt;</div><div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1bit__range.html">   34</a></span>&#160;<span class="keyword">class </span><a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range</a> {</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    <span class="keyword">using</span> byte_t = mp11::mp_if_c&lt;IsMutable, unsigned char, unsigned char const&gt;;</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;    <span class="keyword">using</span> difference_type = std::ptrdiff_t;</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    <span class="keyword">template</span> &lt;<span class="keywordtype">int</span> RS, <span class="keywordtype">bool</span> M&gt; <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range</a>;</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="keyword">private</span>:</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;    byte_t* _current_byte;   <span class="comment">// the starting byte of the bit range</span></div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;    <span class="keywordtype">int</span>     _bit_offset;     <span class="comment">// offset from the beginning of the current byte. 0&lt;=_bit_offset&lt;=7</span></div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;    <a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range</a>() : _current_byte(<span class="keyword">nullptr</span>), _bit_offset(0) {}</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    <a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range</a>(byte_t* current_byte, <span class="keywordtype">int</span> bit_offset)</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;        : _current_byte(current_byte)</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;        , _bit_offset(bit_offset)</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    {</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;        BOOST_ASSERT(bit_offset &gt;= 0 &amp;&amp; bit_offset &lt; 8);</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;</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    <a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range</a>(<span class="keyword">const</span> <a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range</a>&amp; br) : _current_byte(br._current_byte), _bit_offset(br._bit_offset) {}</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    <span class="keyword">template</span> &lt;<span class="keywordtype">bool</span> M&gt; <a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range</a>(<span class="keyword">const</span> <a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range&lt;RangeSize,M&gt;</a>&amp; br) : _current_byte(br._current_byte), _bit_offset(br._bit_offset) {}</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    <a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range</a>&amp; operator=(<span class="keyword">const</span> <a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range</a>&amp; br) { _current_byte = br._current_byte; _bit_offset=br._bit_offset; <span class="keywordflow">return</span> *<span class="keyword">this</span>; }</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    <span class="keywordtype">bool</span> operator==(<span class="keyword">const</span> <a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range</a>&amp; br)<span class="keyword"> const </span>{ <span class="keywordflow">return</span>  _current_byte==br._current_byte &amp;&amp; _bit_offset==br._bit_offset; }</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;    <a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range</a>&amp; operator++() {</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;        _current_byte += (_bit_offset+RangeSize) / 8;</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;        _bit_offset    = (_bit_offset+RangeSize) % 8;</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;        <span class="keywordflow">return</span> *<span class="keyword">this</span>;</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;    <a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range</a>&amp; operator--() { bit_advance(-RangeSize); <span class="keywordflow">return</span> *<span class="keyword">this</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> bit_advance(difference_type num_bits) {</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;        <span class="keywordtype">int</span> new_offset = int(_bit_offset+num_bits);</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;        _current_byte += new_offset / 8;</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;        _bit_offset    = new_offset % 8;</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;        <span class="keywordflow">if</span> (_bit_offset&lt;0) {</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;            _bit_offset+=8;</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;            --_current_byte;</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;        }</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;    difference_type bit_distance_to(<span class="keyword">const</span> <a class="code" href="classboost_1_1gil_1_1bit__range.html">bit_range</a>&amp; b)<span class="keyword"> const </span>{</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;        <span class="keywordflow">return</span> (b.current_byte() - current_byte())*8 + b.bit_offset()-bit_offset();</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;    }</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    byte_t* current_byte()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _current_byte; }</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    <span class="keywordtype">int</span>     bit_offset()<span class="keyword">   const </span>{ <span class="keywordflow">return</span> _bit_offset; }</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;</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> BitField, <span class="keyword">typename</span> ChannelBitSizes, <span class="keyword">typename</span> Layout, <span class="keywordtype">bool</span> IsMutable&gt;</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;<span class="keyword">struct </span>bit_aligned_pixel_reference</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;    <span class="keyword">static</span> constexpr <span class="keywordtype">int</span> bit_size =</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;            mp11::mp_fold</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;            &lt;</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;                ChannelBitSizes,</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;                std::integral_constant&lt;int, 0&gt;,</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;                mp11::mp_plus</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;            &gt;::value;</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">using</span> bit_range_t = <a class="code" href="classboost_1_1gil_1_1bit__range.html">boost::gil::bit_range&lt;bit_size,IsMutable&gt;</a>;</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;    <span class="keyword">using</span> bitfield_t = BitField;</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;    <span class="keyword">using</span> data_ptr_t = mp11::mp_if_c&lt;IsMutable, unsigned char*, const unsigned char*&gt;;</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;    <span class="keyword">using</span> layout_t = Layout;</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">using</span> value_type = <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1packed__pixel.html">packed_pixel_type&lt;bitfield_t,ChannelBitSizes,Layout&gt;::type</a>;</div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    <span class="keyword">using</span> reference = <span class="keyword">const</span> bit_aligned_pixel_reference&lt;BitField, ChannelBitSizes, Layout, IsMutable&gt;;</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;    <span class="keyword">using</span> const_reference = bit_aligned_pixel_reference&lt;BitField,ChannelBitSizes,Layout,false&gt; <span class="keyword">const</span>;</div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;</div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;    <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> is_mutable = IsMutable;</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;    bit_aligned_pixel_reference(){}</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    bit_aligned_pixel_reference(data_ptr_t data_ptr, <span class="keywordtype">int</span> bit_offset)   : _bit_range(data_ptr, bit_offset) {}</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    <span class="keyword">explicit</span> bit_aligned_pixel_reference(<span class="keyword">const</span> bit_range_t&amp; bit_range) : _bit_range(bit_range) {}</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;    <span class="keyword">template</span> &lt;<span class="keywordtype">bool</span> IsMutable2&gt; bit_aligned_pixel_reference(<span class="keyword">const</span> bit_aligned_pixel_reference&lt;BitField,ChannelBitSizes,Layout,IsMutable2&gt;&amp; p) : _bit_range(p._bit_range) {}</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    <span class="comment">// Grayscale references can be constructed from the channel reference</span></div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;    <span class="keyword">explicit</span> bit_aligned_pixel_reference(<span class="keyword">typename</span> kth_element_type&lt;bit_aligned_pixel_reference,0&gt;::type <span class="keyword">const</span> channel0)</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;        : _bit_range(static_cast&lt;data_ptr_t&gt;(&amp;channel0), channel0.first_bit())</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;        static_assert(num_channels&lt;bit_aligned_pixel_reference&gt;::value == 1, <span class="stringliteral">&quot;&quot;</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;</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;    <span class="comment">// Construct from another compatible pixel type</span></div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    bit_aligned_pixel_reference(bit_aligned_pixel_reference <span class="keyword">const</span>&amp; p)</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;        : _bit_range(p._bit_range) {}</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;    <span class="comment">// TODO: Why p by non-const reference?</span></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> BF, <span class="keyword">typename</span> CR&gt;</div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;    bit_aligned_pixel_reference(packed_pixel&lt;BF, CR, Layout&gt;&amp; p)</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;        : _bit_range(static_cast&lt;data_ptr_t&gt;(&amp;gil::<a class="code" href="group___color_base_model_homogeneous.html#gae2eaf5eecbad94d7dc6432b8f759fba0">at_c</a>&lt;0&gt;(p)), gil::<a class="code" href="group___color_base_model_homogeneous.html#gae2eaf5eecbad94d7dc6432b8f759fba0">at_c</a>&lt;0&gt;(p).first_bit())</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;        check_compatible&lt;packed_pixel&lt;BF, CR, Layout&gt;&gt;();</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">auto</span> operator=(bit_aligned_pixel_reference <span class="keyword">const</span>&amp; p) <span class="keyword">const</span></div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;        -&gt; bit_aligned_pixel_reference <span class="keyword">const</span>&amp;</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;        static_copy(p, *<span class="keyword">this</span>);</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;        <span class="keywordflow">return</span> *<span class="keyword">this</span>;</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> P&gt;</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;    <span class="keyword">auto</span> operator=(P <span class="keyword">const</span>&amp; p) <span class="keyword">const</span> -&gt; bit_aligned_pixel_reference <span class="keyword">const</span>&amp;</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;        assign(p, is_pixel&lt;P&gt;());</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;        <span class="keywordflow">return</span> *<span class="keyword">this</span>;</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">template</span> &lt;<span class="keyword">typename</span> P&gt;</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;    <span class="keywordtype">bool</span> operator==(P <span class="keyword">const</span>&amp; p)<span class="keyword"> const</span></div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;<span class="keyword">    </span>{</div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;        <span class="keywordflow">return</span> <a class="code" href="group___s_t_l_optimizations.html#ga2902a23650ef266e80874ce5df076079">equal</a>(p, is_pixel&lt;P&gt;());</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;    }</div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;</div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> P&gt;</div><div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;    <span class="keywordtype">bool</span> operator!=(P <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="l00183"></a><span class="lineno">  183</span>&#160;</div><div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;    <span class="keyword">auto</span> operator-&gt;() const -&gt; bit_aligned_pixel_reference const* { <span class="keywordflow">return</span> <span class="keyword">this</span>; }</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;</div><div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;    bit_range_t <span class="keyword">const</span>&amp; bit_range()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _bit_range; }</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;<span class="keyword">private</span>:</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;    <span class="keyword">mutable</span> bit_range_t _bit_range;</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> B, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L, <span class="keywordtype">bool</span> M&gt; <span class="keyword">friend</span> <span class="keyword">struct </span>bit_aligned_pixel_reference;</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="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt; <span class="keyword">static</span> <span class="keywordtype">void</span> check_compatible() { gil_function_requires&lt;PixelsCompatibleConcept&lt;Pixel,bit_aligned_pixel_reference&gt; &gt;(); }</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;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;    <span class="keywordtype">void</span> assign(Pixel <span class="keyword">const</span>&amp; p, std::true_type)<span class="keyword"> const</span></div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;<span class="keyword">    </span>{</div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;        check_compatible&lt;Pixel&gt;();</div><div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;        static_copy(p, *<span class="keyword">this</span>);</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;</div><div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;    <span class="keywordtype">bool</span> <a class="code" href="group___s_t_l_optimizations.html#ga2902a23650ef266e80874ce5df076079">equal</a>(Pixel <span class="keyword">const</span>&amp; p, std::true_type)<span class="keyword"> const</span></div><div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;<span class="keyword">    </span>{</div><div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;        check_compatible&lt;Pixel&gt;();</div><div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;        <span class="keywordflow">return</span> static_equal(*<span class="keyword">this</span>, p);</div><div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;    }</div><div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;</div><div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;<span class="keyword">private</span>:</div><div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">void</span> check_gray()</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;        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="l00212"></a><span class="lineno">  212</span>&#160;    }</div><div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;</div><div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Channel&gt;</div><div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;    <span class="keywordtype">void</span> assign(Channel <span class="keyword">const</span>&amp; channel, std::false_type)<span class="keyword"> const</span></div><div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;<span class="keyword">    </span>{</div><div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;        check_gray();</div><div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;        gil::at_c&lt;0&gt;(*<span class="keyword">this</span>) = channel;</div><div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;    }</div><div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;</div><div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Channel&gt;</div><div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;    <span class="keywordtype">bool</span> <a class="code" href="group___s_t_l_optimizations.html#ga2902a23650ef266e80874ce5df076079">equal</a> (Channel <span class="keyword">const</span>&amp; channel, std::false_type)<span class="keyword"> const</span></div><div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;<span class="keyword">    </span>{</div><div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;        check_gray();</div><div class="line"><a name="l00225"></a><span class="lineno">  225</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="l00226"></a><span class="lineno">  226</span>&#160;    }</div><div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;};</div><div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;</div><div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;<span class="comment">//  ColorBasedConcept</span></div><div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> BitField, <span class="keyword">typename</span> ChannelBitSizes, <span class="keyword">typename</span> L, <span class="keywordtype">bool</span> IsMutable, <span class="keywordtype">int</span> K&gt;</div><div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;<span class="keyword">struct </span>kth_element_type</div><div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;&lt;</div><div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;    bit_aligned_pixel_reference&lt;BitField, ChannelBitSizes, L, IsMutable&gt;,</div><div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;    K</div><div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;&gt;</div><div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;{</div><div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;    <span class="keyword">using</span> type = packed_dynamic_channel_reference</div><div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;        &lt;</div><div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;            BitField,</div><div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;            mp11::mp_at_c&lt;ChannelBitSizes, K&gt;::value,</div><div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;            IsMutable</div><div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;        &gt; <span class="keyword">const</span>;</div><div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;};</div><div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;</div><div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> B, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L, <span class="keywordtype">bool</span> M, <span class="keywordtype">int</span> K&gt;</div><div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;<span class="keyword">struct </span>kth_element_reference_type&lt;bit_aligned_pixel_reference&lt;B,C,L,M&gt;, K&gt;</div><div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;    : <span class="keyword">public</span> kth_element_type&lt;bit_aligned_pixel_reference&lt;B,C,L,M&gt;, K&gt; {};</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;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> B, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L, <span class="keywordtype">bool</span> M, <span class="keywordtype">int</span> K&gt;</div><div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;<span class="keyword">struct </span>kth_element_const_reference_type&lt;bit_aligned_pixel_reference&lt;B,C,L,M&gt;, K&gt;</div><div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;    : <span class="keyword">public</span> kth_element_type&lt;bit_aligned_pixel_reference&lt;B,C,L,M&gt;, K&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">namespace </span>detail {</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;<span class="comment">// returns sum of IntegralVector[0] ... IntegralVector[K-1]</span></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> IntegralVector, <span class="keywordtype">int</span> K&gt;</div><div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;<span class="keyword">struct </span>sum_k</div><div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;    : mp11::mp_plus</div><div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;        &lt;</div><div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;            sum_k&lt;IntegralVector, K - 1&gt;,</div><div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;            typename mp11::mp_at_c&lt;IntegralVector, K - 1&gt;::type</div><div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;        &gt;</div><div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;{};</div><div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;</div><div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> IntegralVector&gt;</div><div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;<span class="keyword">struct </span>sum_k&lt;IntegralVector, 0&gt; : std::integral_constant&lt;int, 0&gt; {};</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="comment">// namespace detail</span></div><div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;</div><div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;<span class="comment">// at_c required by MutableColorBaseConcept</span></div><div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;<span class="keyword">template</span> &lt;<span class="keywordtype">int</span> K, <span class="keyword">typename</span> BitField, <span class="keyword">typename</span> ChannelBitSizes, <span class="keyword">typename</span> L, <span class="keywordtype">bool</span> IsMutable&gt;</div><div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;<span class="keyword">inline</span></div><div class="line"><a name="l00276"></a><span class="lineno">  276</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> bit_aligned_pixel_reference&lt;BitField, ChannelBitSizes, L, IsMutable&gt;&amp; p)</div><div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;    -&gt; <span class="keyword">typename</span> kth_element_reference_type&lt;bit_aligned_pixel_reference&lt;BitField, ChannelBitSizes, L, IsMutable&gt;, K&gt;::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="keyword">using</span> pixel_t = bit_aligned_pixel_reference&lt;BitField, ChannelBitSizes, L, IsMutable&gt;;</div><div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;    <span class="keyword">using</span> channel_t = <span class="keyword">typename</span> kth_element_reference_type&lt;pixel_t, K&gt;::type;</div><div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;    <span class="keyword">using</span> bit_range_t = <span class="keyword">typename</span> pixel_t::bit_range_t;</div><div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;</div><div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;    bit_range_t bit_range(p.bit_range());</div><div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;    bit_range.bit_advance(detail::sum_k&lt;ChannelBitSizes, K&gt;::value);</div><div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;</div><div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;    <span class="keywordflow">return</span> channel_t(bit_range.current_byte(), bit_range.bit_offset());</div><div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;}</div><div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;</div><div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;<span class="comment">//  PixelConcept</span></div><div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> B, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L, <span class="keywordtype">bool</span> M&gt;</div><div class="line"><a name="l00295"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1is__pixel_3_01bit__aligned__pixel__reference_3_01_b_00_01_c_00_01_l_00_01_m_01_4_01_4.html">  295</a></span>&#160;<span class="keyword">struct </span>is_pixel&lt;bit_aligned_pixel_reference&lt;B, C, L, M&gt; &gt; : std::true_type {};</div><div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;</div><div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;<span class="comment">//  PixelBasedConcept</span></div><div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> B, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L, <span class="keywordtype">bool</span> M&gt;</div><div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;<span class="keyword">struct </span>color_space_type&lt;bit_aligned_pixel_reference&lt;B, C, L, M&gt;&gt;</div><div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;{</div><div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;    <span class="keyword">using</span> type = <span class="keyword">typename</span> L::color_space_t;</div><div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;};</div><div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;</div><div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> B, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L, <span class="keywordtype">bool</span> M&gt;</div><div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;<span class="keyword">struct </span>channel_mapping_type&lt;bit_aligned_pixel_reference&lt;B, C, L, M&gt;&gt;</div><div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;{</div><div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;    <span class="keyword">using</span> type = <span class="keyword">typename</span> L::channel_mapping_t;</div><div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;};</div><div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;</div><div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> B, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L, <span class="keywordtype">bool</span> M&gt;</div><div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;<span class="keyword">struct </span>is_planar&lt;bit_aligned_pixel_reference&lt;B, C, L, M&gt;&gt; : std::false_type {};</div><div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;</div><div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;<span class="comment">//  pixel_reference_type</span></div><div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;<span class="comment">// Constructs a homogeneous bit_aligned_pixel_reference given a channel reference</span></div><div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> BitField, <span class="keywordtype">int</span> NumBits, <span class="keyword">typename</span> Layout&gt;</div><div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;<span class="keyword">struct </span>pixel_reference_type</div><div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;    &lt;</div><div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;        packed_dynamic_channel_reference&lt;BitField, NumBits, false&gt; const,</div><div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;        Layout, false, false</div><div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;    &gt;</div><div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;{</div><div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;<span class="keyword">private</span>:</div><div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;    <span class="keyword">using</span> channel_bit_sizes_t = mp11::mp_repeat</div><div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;        &lt;</div><div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;            mp11::mp_list&lt;std::integral_constant&lt;unsigned, NumBits&gt;&gt;,</div><div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;            mp11::mp_size&lt;typename Layout::color_space_t&gt;</div><div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;        &gt;;</div><div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;</div><div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;    <span class="keyword">using</span> type =</div><div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;        bit_aligned_pixel_reference&lt;BitField, channel_bit_sizes_t, Layout, false&gt;;</div><div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;};</div><div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;</div><div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;<span class="comment">// Same but for the mutable case. We cannot combine the mutable</span></div><div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;<span class="comment">// and read-only cases because this triggers ambiguity</span></div><div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> BitField, <span class="keywordtype">int</span> NumBits, <span class="keyword">typename</span> Layout&gt;</div><div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;<span class="keyword">struct </span>pixel_reference_type</div><div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;    &lt;</div><div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;        packed_dynamic_channel_reference&lt;BitField, NumBits, true&gt; const,</div><div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;        Layout, false, true</div><div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;    &gt;</div><div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;{</div><div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;<span class="keyword">private</span>:</div><div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;    <span class="keyword">using</span> channel_bit_sizes_t = mp11::mp_repeat</div><div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;        &lt;</div><div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;            mp11::mp_list&lt;std::integral_constant&lt;unsigned, NumBits&gt;&gt;,</div><div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;            mp11::mp_size&lt;typename Layout::color_space_t&gt;</div><div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;        &gt;;</div><div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;</div><div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;    <span class="keyword">using</span> type = bit_aligned_pixel_reference&lt;BitField, channel_bit_sizes_t, Layout, true&gt;;</div><div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;};</div><div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;</div><div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;} }  <span class="comment">// namespace boost::gil</span></div><div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;</div><div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;<span class="keyword">namespace </span>std {</div><div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;</div><div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;<span class="comment">// We are forced to define swap inside std namespace because on some platforms (Visual Studio 8) STL calls swap qualified.</span></div><div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;<span class="comment">// swap with &#39;left bias&#39;:</span></div><div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;<span class="comment">// - swap between proxy and anything</span></div><div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;<span class="comment">// - swap between value type and proxy</span></div><div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;<span class="comment">// - swap between proxy and proxy</span></div><div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;<span class="comment">// Having three overloads allows us to swap between different (but compatible) models of PixelConcept</span></div><div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;</div><div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> B, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L, <span class="keyword">typename</span> R&gt; <span class="keyword">inline</span></div><div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;<span class="keywordtype">void</span> <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(<span class="keyword">const</span> boost::gil::bit_aligned_pixel_reference&lt;B,C,L,true&gt; x, R&amp; y) {</div><div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;    boost::gil::swap_proxy&lt;typename boost::gil::bit_aligned_pixel_reference&lt;B,C,L,true&gt;::value_type&gt;(x,y);</div><div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;}</div><div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;</div><div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;</div><div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> B, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L&gt; <span class="keyword">inline</span></div><div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;<span class="keywordtype">void</span> <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(<span class="keyword">typename</span> boost::gil::bit_aligned_pixel_reference&lt;B,C,L,true&gt;::value_type&amp; x, <span class="keyword">const</span> boost::gil::bit_aligned_pixel_reference&lt;B,C,L,true&gt; y) {</div><div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;    boost::gil::swap_proxy&lt;typename boost::gil::bit_aligned_pixel_reference&lt;B,C,L,true&gt;::value_type&gt;(x,y);</div><div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;}</div><div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;</div><div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;</div><div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> B, <span class="keyword">typename</span> C, <span class="keyword">typename</span> L&gt; <span class="keyword">inline</span></div><div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;<span class="keywordtype">void</span> <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(<span class="keyword">const</span> boost::gil::bit_aligned_pixel_reference&lt;B,C,L,true&gt; x, <span class="keyword">const</span> boost::gil::bit_aligned_pixel_reference&lt;B,C,L,true&gt; y) {</div><div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;    boost::gil::swap_proxy&lt;typename boost::gil::bit_aligned_pixel_reference&lt;B,C,L,true&gt;::value_type&gt;(x,y);</div><div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;}</div><div class="line"><a name="l00387"></a><span class="lineno">  387</span>&#160;</div><div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;} <span class="comment">// namespace std</span></div><div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;</div><div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;<span class="preprocessor">#endif</span></div><div class="ttc" id="classboost_1_1gil_1_1bit__range_html"><div class="ttname"><a href="classboost_1_1gil_1_1bit__range.html">boost::gil::bit_range</a></div><div class="ttdef"><b>Definition:</b> bit_aligned_pixel_reference.hpp:34</div></div>
  51 <div class="ttc" id="group___s_t_l_optimizations_html_ga2902a23650ef266e80874ce5df076079"><div class="ttname"><a href="group___s_t_l_optimizations.html#ga2902a23650ef266e80874ce5df076079">std::equal</a></div><div class="ttdeci">BOOST_FORCEINLINE bool equal(boost::gil::iterator_from_2d&lt; Loc1 &gt; first, boost::gil::iterator_from_2d&lt; Loc1 &gt; last, boost::gil::iterator_from_2d&lt; Loc2 &gt; first2)</div><div class="ttdoc">std::equal(I1,I1,I2) with I1 and I2 being a iterator_from_2d</div><div class="ttdef"><b>Definition:</b> algorithm.hpp:1029</div></div>
  52 <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>
  53 <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>
  54 <div class="ttc" id="structboost_1_1gil_1_1packed__pixel_html"><div class="ttname"><a href="structboost_1_1gil_1_1packed__pixel.html">boost::gil::packed_pixel</a></div><div class="ttdoc">Heterogeneous pixel value whose channel references can be constructed from the pixel bitfield and the...</div><div class="ttdef"><b>Definition:</b> metafunctions.hpp:24</div></div>
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