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  50 <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">// Copyright 2005-2007 Adobe Systems Incorporated</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">// Distributed under the Boost Software License, Version 1.0</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">// See accompanying file LICENSE_1_0.txt or copy at</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">// http://www.boost.org/LICENSE_1_0.txt</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">//</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="preprocessor">#ifndef BOOST_GIL_IMAGE_VIEW_HPP</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor">#define BOOST_GIL_IMAGE_VIEW_HPP</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;</div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#include &lt;boost/gil/dynamic_step.hpp&gt;</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &lt;boost/gil/iterator_from_2d.hpp&gt;</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;</div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &lt;boost/assert.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;cstddef&gt;</span></div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#include &lt;iterator&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="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {</div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Loc&gt;     <span class="comment">// Models 2D Pixel Locator</span></div><div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1image__view.html">   53</a></span>&#160;<span class="keyword">class </span><a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a></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;<span class="keyword">public</span>:</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    <span class="comment">// aliases required by ConstRandomAccessNDImageViewConcept</span></div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;    <span class="keyword">static</span> <span class="keyword">const</span> std::size_t num_dimensions=2;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    <span class="keyword">using</span> value_type = <span class="keyword">typename</span> Loc::value_type;</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    <span class="keyword">using</span> reference = <span class="keyword">typename</span> Loc::reference;       <span class="comment">// result of dereferencing</span></div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;    <span class="keyword">using</span> coord_t = <span class="keyword">typename</span> Loc::coord_t;      <span class="comment">// 1D difference type (same for all dimensions)</span></div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;    <span class="keyword">using</span> difference_type = coord_t; <span class="comment">// result of operator-(1d_iterator,1d_iterator)</span></div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    <span class="keyword">using</span> point_t = <span class="keyword">typename</span> Loc::point_t;</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;    <span class="keyword">using</span> locator = Loc;</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;    <span class="keyword">using</span> <a class="code" href="classboost_1_1gil_1_1image__view.html">const_t</a> = <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view&lt;typename Loc::const_t&gt;</a>;      <span class="comment">// same as this type, but over const values</span></div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;    <span class="keyword">template</span> &lt;std::<span class="keywordtype">size_t</span> D&gt; <span class="keyword">struct </span>axis</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;    {</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;        <span class="keyword">using</span> coord_t = <span class="keyword">typename</span> Loc::template axis&lt;D&gt;::coord_t; <span class="comment">// difference_type along each dimension</span></div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;        <span class="keyword">using</span> <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">iterator</a> = <span class="keyword">typename</span> Loc::template axis&lt;D&gt;::iterator; <span class="comment">// 1D iterator type along each dimension</span></div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;    };</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;    <span class="keyword">using</span> <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">iterator</a> = <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">iterator_from_2d&lt;Loc&gt;</a>;       <span class="comment">// 1D iterator type for each pixel left-to-right inside top-to-bottom</span></div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;    <span class="keyword">using</span> const_iterator = <span class="keyword">typename</span> <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">const_t::iterator</a>;  <span class="comment">// may be used to examine, but not to modify values</span></div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    <span class="keyword">using</span> const_reference = <span class="keyword">typename</span> const_t::reference; <span class="comment">// behaves as a const reference</span></div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    <span class="keyword">using</span> pointer = <span class="keyword">typename</span> std::iterator_traits&lt;iterator&gt;::pointer; <span class="comment">// behaves as a pointer to the value type</span></div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    <span class="keyword">using</span> reverse_iterator = std::reverse_iterator&lt;iterator&gt;;</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;    <span class="keyword">using</span> size_type = std::size_t;</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;    <span class="comment">// aliases required by ConstRandomAccess2DImageViewConcept</span></div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    <span class="keyword">using</span> xy_locator = locator;</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;    <span class="keyword">using</span> x_iterator = <span class="keyword">typename</span> xy_locator::x_iterator;     <span class="comment">// pixel iterator along a row</span></div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;    <span class="keyword">using</span> y_iterator = <span class="keyword">typename</span> xy_locator::y_iterator;     <span class="comment">// pixel iterator along a column</span></div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    <span class="keyword">using</span> x_coord_t = <span class="keyword">typename</span> xy_locator::x_coord_t;</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    <span class="keyword">using</span> y_coord_t = <span class="keyword">typename</span> xy_locator::y_coord_t;</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Deref&gt;</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    <span class="keyword">struct </span>add_deref</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;    {</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;        <span class="keyword">using</span> type = <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view&lt;typename Loc::template add_deref&lt;Deref&gt;::type</a>&gt;;</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;        <span class="keyword">static</span> type make(<a class="code" href="classboost_1_1gil_1_1image__view.html">image_view&lt;Loc&gt;</a> <span class="keyword">const</span>&amp; <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>, Deref <span class="keyword">const</span>&amp; d)</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;        {</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;            <span class="keywordflow">return</span> type(<a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>.dimensions(), Loc::template add_deref&lt;Deref&gt;::make(<a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>.pixels(), d));</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;        }</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;    };</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;    <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>() : _dimensions(0,0) {}</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;    <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>(<a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a> <span class="keyword">const</span>&amp; img_view)</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;        : _dimensions(img_view.dimensions()), _pixels(img_view.pixels())</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;    {}</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>(View <span class="keyword">const</span>&amp; <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>) : _dimensions(<a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>.dimensions()), _pixels(<a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>.pixels()) {}</div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> L2&gt;</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;    <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>(point_t <span class="keyword">const</span>&amp; dims, L2 <span class="keyword">const</span>&amp; loc) : _dimensions(dims), _pixels(loc) {}</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> L2&gt;</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;    <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>(coord_t width, coord_t height, L2 <span class="keyword">const</span>&amp; loc)</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;        : _dimensions(x_coord_t(width), y_coord_t(height)), _pixels(loc)</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    {}</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;    <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>&amp; operator=(View <span class="keyword">const</span>&amp; <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>)</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;    {</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;        _pixels = <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>.pixels();</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;        _dimensions = <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>.dimensions();</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;        <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;    }</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>&amp; operator=(<a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a> <span class="keyword">const</span>&amp; <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>)</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    {</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;        <span class="comment">// TODO: Self-assignment protection?</span></div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;        _pixels = <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>.pixels();</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;        _dimensions = <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>.dimensions();</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;        <span class="keywordflow">return</span> *<span class="keyword">this</span>;</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;</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;    <span class="keywordtype">bool</span> operator==(View <span class="keyword">const</span> &amp;<a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>)<span class="keyword"> const</span></div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;<span class="keyword">    </span>{</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;        <span class="keywordflow">return</span> pixels() == <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>.pixels() &amp;&amp; dimensions() == <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>.dimensions();</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;</div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;    <span class="keywordtype">bool</span> operator!=(View <span class="keyword">const</span>&amp; <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>)<span class="keyword"> const</span></div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;<span class="keyword">    </span>{</div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;        <span class="keywordflow">return</span> !(*<span class="keyword">this</span> == <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>);</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;</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> L2&gt;</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    <span class="keyword">friend</span> <span class="keywordtype">void</span> swap(<a class="code" href="classboost_1_1gil_1_1image__view.html">image_view&lt;L2&gt;</a> &amp;lhs, <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view&lt;L2&gt;</a> &amp;rhs);</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;</div><div class="line"><a name="l00146"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1image__view.html#a6abdcb0b8cadeb8f39806bd6413a2075">  146</a></span>&#160;    <span class="keywordtype">void</span> <a class="code" href="classboost_1_1gil_1_1image__view.html#a6abdcb0b8cadeb8f39806bd6413a2075">swap</a>(<a class="code" href="classboost_1_1gil_1_1image__view.html">image_view&lt;Loc&gt;</a>&amp; other)</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;    {</div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;        <span class="keyword">using</span> <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">boost::gil::swap</a>;</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;        swap(*<span class="keyword">this</span>, other);</div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    }</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;    <span class="keyword">auto</span> dimensions() const -&gt; <a class="code" href="classboost_1_1gil_1_1point.html">point_t</a> const&amp;</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;    {</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;        <span class="keywordflow">return</span> _dimensions;</div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;    }</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;</div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    <span class="keyword">auto</span> pixels() const -&gt; locator const&amp;</div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;    {</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;        <span class="keywordflow">return</span> _pixels;</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;    }</div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;</div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;    <span class="keyword">auto</span> width() const -&gt; x_coord_t</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;        <span class="keywordflow">return</span> dimensions().x;</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;    }</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;</div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;    <span class="keyword">auto</span> height() const -&gt; y_coord_t</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;    {</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;        <span class="keywordflow">return</span> dimensions().y;</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;</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    <span class="keyword">auto</span> num_channels() const -&gt; std::<span class="keywordtype">size_t</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;        <span class="keywordflow">return</span> gil::num_channels&lt;value_type&gt;::value;</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;    }</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;    <span class="keywordtype">bool</span> is_1d_traversable()<span class="keyword"> const</span></div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;<span class="keyword">    </span>{</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;        <span class="keywordflow">return</span> _pixels.is_1d_traversable(width());</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;</div><div class="line"><a name="l00186"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1image__view.html#a644718bb2fb240de962dc3c9a1fdf0dc">  186</a></span>&#160;    <span class="keywordtype">bool</span> <a class="code" href="classboost_1_1gil_1_1image__view.html#a644718bb2fb240de962dc3c9a1fdf0dc">empty</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;<span class="keyword">    </span>{</div><div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;        <span class="keywordflow">return</span> !(width() &gt; 0 &amp;&amp; height() &gt; 0);</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;    }</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;</div><div class="line"><a name="l00195"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1image__view.html#a34d0cb181d67db75fc76cf2c86714c63">  195</a></span>&#160;    <span class="keyword">auto</span> <a class="code" href="classboost_1_1gil_1_1image__view.html#a34d0cb181d67db75fc76cf2c86714c63">front</a>() const -&gt; reference</div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;    {</div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;        BOOST_ASSERT(!<a class="code" href="classboost_1_1gil_1_1image__view.html#a644718bb2fb240de962dc3c9a1fdf0dc">empty</a>());</div><div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;        <span class="keywordflow">return</span> *begin();</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="l00205"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1image__view.html#a2250401399336343c9b61c4a115bb6f7">  205</a></span>&#160;    <span class="keyword">auto</span> <a class="code" href="classboost_1_1gil_1_1image__view.html#a2250401399336343c9b61c4a115bb6f7">back</a>() const -&gt; reference</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;        BOOST_ASSERT(!<a class="code" href="classboost_1_1gil_1_1image__view.html#a644718bb2fb240de962dc3c9a1fdf0dc">empty</a>());</div><div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;        <span class="keywordflow">return</span> *rbegin();</div><div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;    }</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;    <span class="comment">//\{@</span></div><div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;<span class="comment"></span>    <span class="keyword">auto</span> <a class="code" href="structboost_1_1gil_1_1size.html">size</a>() const -&gt; size_type</div><div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;    {</div><div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;        <span class="keywordflow">return</span> width() * height();</div><div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;    }</div><div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;</div><div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;    <span class="keyword">auto</span> begin() const -&gt; iterator</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;        <span class="keywordflow">return</span> iterator(_pixels, _dimensions.x);</div><div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;    }</div><div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;</div><div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;    <span class="keyword">auto</span> end() const -&gt; iterator</div><div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;    {</div><div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;        <span class="comment">// potential performance problem!</span></div><div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;        <span class="keywordflow">return</span> begin() + static_cast&lt;difference_type&gt;(size());</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="l00229"></a><span class="lineno">  229</span>&#160;    <span class="keyword">auto</span> rbegin() const -&gt; reverse_iterator</div><div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;    {</div><div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;        <span class="keywordflow">return</span> reverse_iterator(end());</div><div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;    }</div><div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;</div><div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;    <span class="keyword">auto</span> rend() const -&gt; reverse_iterator</div><div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;    {</div><div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;        <span class="keywordflow">return</span> reverse_iterator(begin());</div><div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;    }</div><div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;</div><div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;    <span class="keyword">auto</span> operator[](difference_type i) <span class="keyword">const</span> -&gt; reference</div><div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;    {</div><div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;        BOOST_ASSERT(i &lt; static_cast&lt;difference_type&gt;(size()));</div><div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;        <span class="keywordflow">return</span> begin()[i]; <span class="comment">// potential performance problem!</span></div><div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;    }</div><div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;</div><div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;    <span class="keyword">auto</span> at(difference_type i) <span class="keyword">const</span> -&gt;iterator</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;        BOOST_ASSERT(i &lt; size());</div><div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;        <span class="keywordflow">return</span> begin() + i;</div><div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;    }</div><div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;</div><div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;    <span class="keyword">auto</span> at(point_t <span class="keyword">const</span>&amp; p) <span class="keyword">const</span> -&gt; iterator</div><div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;    {</div><div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;        BOOST_ASSERT(0 &lt;= p.x &amp;&amp; p.x &lt; width());</div><div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;        BOOST_ASSERT(0 &lt;= p.y &amp;&amp; p.y &lt; height());</div><div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;        <span class="keywordflow">return</span> begin() + p.y * width() + p.x;</div><div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;    }</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="keyword">auto</span> at(x_coord_t x, y_coord_t y) <span class="keyword">const</span> -&gt; iterator</div><div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;    {</div><div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;        BOOST_ASSERT(0 &lt;= x &amp;&amp; x &lt; width());</div><div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;        BOOST_ASSERT(0 &lt;= y &amp;&amp; y &lt; height());</div><div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;        <span class="keywordflow">return</span> begin() + y * width() + x;</div><div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;    }</div><div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;    <span class="comment">//\}@</span></div><div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;</div><div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;    <span class="comment">//\{@</span></div><div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;<span class="comment"></span>    <span class="keyword">auto</span> operator()(point_t <span class="keyword">const</span>&amp; p) <span class="keyword">const</span> -&gt; reference</div><div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;    {</div><div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;        BOOST_ASSERT(0 &lt;= p.x &amp;&amp; p.x &lt; width());</div><div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;        BOOST_ASSERT(0 &lt;= p.y &amp;&amp; p.y &lt; height());</div><div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;        <span class="keywordflow">return</span> _pixels(p.x, p.y);</div><div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;    }</div><div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;</div><div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;    <span class="keyword">auto</span> operator()(x_coord_t x, y_coord_t y) <span class="keyword">const</span> -&gt; reference</div><div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;    {</div><div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;        BOOST_ASSERT(0 &lt;= x &amp;&amp; x &lt; width());</div><div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;        BOOST_ASSERT(0 &lt;= y &amp;&amp; y &lt; height());</div><div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;        <span class="keywordflow">return</span> _pixels(x, y);</div><div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;    }</div><div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;</div><div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;    <span class="keyword">template</span> &lt;std::<span class="keywordtype">size_t</span> D&gt;</div><div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;    <span class="keyword">auto</span> axis_iterator(point_t <span class="keyword">const</span>&amp; p) <span class="keyword">const</span> -&gt; <span class="keyword">typename</span> axis&lt;D&gt;::iterator</div><div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;    {</div><div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;        <span class="comment">// allow request for iterators from inclusive range of [begin, end]</span></div><div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;        BOOST_ASSERT(0 &lt;= p.x &amp;&amp; p.x &lt;= width());</div><div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;        BOOST_ASSERT(0 &lt;= p.y &amp;&amp; p.y &lt;= height());</div><div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;        <span class="keywordflow">return</span> _pixels.template axis_iterator&lt;D&gt;(p);</div><div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;    }</div><div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;</div><div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;    <span class="keyword">auto</span> xy_at(x_coord_t x, y_coord_t y) <span class="keyword">const</span> -&gt; xy_locator</div><div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;    {</div><div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;        <span class="comment">// TODO: Are relative locations of neighbors with negative offsets valid? Sampling?</span></div><div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;        BOOST_ASSERT(x &lt; width());</div><div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;        BOOST_ASSERT(y &lt; height());</div><div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;        <span class="keywordflow">return</span> _pixels + point_t(x, y);</div><div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;    }</div><div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;</div><div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;    <span class="keyword">auto</span> xy_at(point_t <span class="keyword">const</span>&amp; p) <span class="keyword">const</span> -&gt; locator</div><div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;    {</div><div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;        <span class="comment">// TODO: Are relative locations of neighbors with negative offsets valid? Sampling?</span></div><div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;        BOOST_ASSERT(p.x &lt; width());</div><div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;        BOOST_ASSERT(p.y &lt; height());</div><div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;        <span class="keywordflow">return</span> _pixels + p;</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;    <span class="comment">//\}@</span></div><div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;</div><div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;    <span class="comment">//\{@</span></div><div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;<span class="comment"></span>    <span class="keyword">auto</span> x_at(x_coord_t x, y_coord_t y) <span class="keyword">const</span> -&gt; x_iterator</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;        BOOST_ASSERT(0 &lt;= x &amp;&amp; x &lt;= width()); <span class="comment">// allow request for [begin, end] inclusive</span></div><div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;        BOOST_ASSERT(0 &lt;= y &amp;&amp; y &lt; height());</div><div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;        <span class="keywordflow">return</span> _pixels.x_at(x, y);</div><div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;    }</div><div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;</div><div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;    <span class="keyword">auto</span> x_at(point_t <span class="keyword">const</span>&amp; p) <span class="keyword">const</span> -&gt; x_iterator</div><div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;    {</div><div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;        BOOST_ASSERT(0 &lt;= p.x &amp;&amp; p.x &lt;= width()); <span class="comment">// allow request for [begin, end] inclusive</span></div><div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;        BOOST_ASSERT(0 &lt;= p.y &amp;&amp; p.y &lt; height());</div><div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;        <span class="keywordflow">return</span> _pixels.x_at(p);</div><div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;    }</div><div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;</div><div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;    <span class="keyword">auto</span> row_begin(y_coord_t y) <span class="keyword">const</span> -&gt; x_iterator</div><div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;    {</div><div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;        BOOST_ASSERT(0 &lt;= y &amp;&amp; y &lt; height());</div><div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;        <span class="keywordflow">return</span> x_at(0, y);</div><div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;    }</div><div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;</div><div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;    <span class="keyword">auto</span> row_end(y_coord_t y) <span class="keyword">const</span> -&gt; x_iterator</div><div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;    {</div><div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;        BOOST_ASSERT(0 &lt;= y &amp;&amp; y &lt; height());</div><div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;        <span class="keywordflow">return</span> x_at(width(), y);</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="comment">//\}@</span></div><div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;</div><div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;    <span class="comment">//\{@</span></div><div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;<span class="comment"></span>    <span class="keyword">auto</span> y_at(x_coord_t x, y_coord_t y) <span class="keyword">const</span> -&gt; y_iterator</div><div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;    {</div><div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;        BOOST_ASSERT(0 &lt;= x &amp;&amp; x &lt; width());</div><div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;        BOOST_ASSERT(0 &lt;= y &amp;&amp; y &lt;= height()); <span class="comment">// allow request for [begin, end] inclusive</span></div><div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;        <span class="keywordflow">return</span> xy_at(x, y).y();</div><div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;    }</div><div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;</div><div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;    <span class="keyword">auto</span> y_at(point_t <span class="keyword">const</span>&amp; p) <span class="keyword">const</span> -&gt; y_iterator</div><div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;    {</div><div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;        BOOST_ASSERT(0 &lt;= p.x &amp;&amp; p.x &lt; width());</div><div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;        BOOST_ASSERT(0 &lt;= p.y &amp;&amp; p.y &lt;= height()); <span class="comment">// allow request for [begin, end] inclusive</span></div><div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;        <span class="keywordflow">return</span> xy_at(p).y();</div><div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;    }</div><div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;</div><div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;    <span class="keyword">auto</span> col_begin(x_coord_t x) <span class="keyword">const</span> -&gt; y_iterator</div><div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;    {</div><div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;        BOOST_ASSERT(0 &lt;= x &amp;&amp; x &lt; width());</div><div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;        <span class="keywordflow">return</span> y_at(x, 0);</div><div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;    }</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;    <span class="keyword">auto</span> col_end(x_coord_t x) <span class="keyword">const</span> -&gt; y_iterator</div><div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;    {</div><div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;        BOOST_ASSERT(0 &lt;= x &amp;&amp; x &lt; width());</div><div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;        <span class="keywordflow">return</span> y_at(x, height());</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">//\}@</span></div><div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;</div><div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;<span class="keyword">private</span>:</div><div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> L2&gt;</div><div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;    <span class="keyword">friend</span> <span class="keyword">class </span>image_view;</div><div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;</div><div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;    point_t    _dimensions;</div><div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;    xy_locator _pixels;</div><div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;};</div><div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;</div><div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> L2&gt;</div><div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;<span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(image_view&lt;L2&gt;&amp; x, image_view&lt;L2&gt;&amp; y) {</div><div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;    <span class="keyword">using</span> <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">std::swap</a>;</div><div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;    <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(x._dimensions,y._dimensions);</div><div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;    <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(x._pixels, y._pixels);            <span class="comment">// TODO: Extend further</span></div><div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;}</div><div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;</div><div class="line"><a name="l00382"></a><span class="lineno">  382</span>&#160;<span class="comment">//  PixelBasedConcept</span></div><div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> L&gt;</div><div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;<span class="keyword">struct </span>channel_type&lt;image_view&lt;L&gt; &gt; : <span class="keyword">public</span> channel_type&lt;L&gt; {};</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="keyword">template</span> &lt;<span class="keyword">typename</span> L&gt;</div><div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;<span class="keyword">struct </span>color_space_type&lt;image_view&lt;L&gt; &gt; : <span class="keyword">public</span> color_space_type&lt;L&gt; {};</div><div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;</div><div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> L&gt;</div><div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;<span class="keyword">struct </span>channel_mapping_type&lt;image_view&lt;L&gt; &gt; : <span class="keyword">public</span> channel_mapping_type&lt;L&gt; {};</div><div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;</div><div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> L&gt;</div><div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;<span class="keyword">struct </span>is_planar&lt;image_view&lt;L&gt; &gt; : <span class="keyword">public</span> is_planar&lt;L&gt; {};</div><div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;</div><div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;<span class="comment">//  HasDynamicXStepTypeConcept</span></div><div class="line"><a name="l00400"></a><span class="lineno">  400</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00401"></a><span class="lineno">  401</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> L&gt;</div><div class="line"><a name="l00402"></a><span class="lineno">  402</span>&#160;<span class="keyword">struct </span>dynamic_x_step_type&lt;image_view&lt;L&gt;&gt;</div><div class="line"><a name="l00403"></a><span class="lineno">  403</span>&#160;{</div><div class="line"><a name="l00404"></a><span class="lineno">  404</span>&#160;    <span class="keyword">using</span> type = image_view&lt;typename gil::dynamic_x_step_type&lt;L&gt;::type&gt;;</div><div class="line"><a name="l00405"></a><span class="lineno">  405</span>&#160;};</div><div class="line"><a name="l00406"></a><span class="lineno">  406</span>&#160;</div><div class="line"><a name="l00408"></a><span class="lineno">  408</span>&#160;<span class="comment">//  HasDynamicYStepTypeConcept</span></div><div class="line"><a name="l00410"></a><span class="lineno">  410</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00411"></a><span class="lineno">  411</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> L&gt;</div><div class="line"><a name="l00412"></a><span class="lineno">  412</span>&#160;<span class="keyword">struct </span>dynamic_y_step_type&lt;image_view&lt;L&gt;&gt;</div><div class="line"><a name="l00413"></a><span class="lineno">  413</span>&#160;{</div><div class="line"><a name="l00414"></a><span class="lineno">  414</span>&#160;    <span class="keyword">using</span> type = image_view&lt;typename gil::dynamic_y_step_type&lt;L&gt;::type&gt;;</div><div class="line"><a name="l00415"></a><span class="lineno">  415</span>&#160;};</div><div class="line"><a name="l00416"></a><span class="lineno">  416</span>&#160;</div><div class="line"><a name="l00418"></a><span class="lineno">  418</span>&#160;<span class="comment">//  HasTransposedTypeConcept</span></div><div class="line"><a name="l00420"></a><span class="lineno">  420</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00421"></a><span class="lineno">  421</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> L&gt;</div><div class="line"><a name="l00422"></a><span class="lineno">  422</span>&#160;<span class="keyword">struct </span>transposed_type&lt;image_view&lt;L&gt;&gt;</div><div class="line"><a name="l00423"></a><span class="lineno">  423</span>&#160;{</div><div class="line"><a name="l00424"></a><span class="lineno">  424</span>&#160;    <span class="keyword">using</span> type = image_view&lt;typename transposed_type&lt;L&gt;::type&gt;;</div><div class="line"><a name="l00425"></a><span class="lineno">  425</span>&#160;};</div><div class="line"><a name="l00426"></a><span class="lineno">  426</span>&#160;</div><div class="line"><a name="l00427"></a><span class="lineno">  427</span>&#160;}}  <span class="comment">// namespace boost::gil</span></div><div class="line"><a name="l00428"></a><span class="lineno">  428</span>&#160;</div><div class="line"><a name="l00429"></a><span class="lineno">  429</span>&#160;<span class="preprocessor">#endif</span></div><div class="ttc" id="classboost_1_1gil_1_1image__view_html"><div class="ttname"><a href="classboost_1_1gil_1_1image__view.html">boost::gil::image_view</a></div><div class="ttdoc">A lightweight object that interprets memory as a 2D array of pixels. Models ImageViewConcept,...</div><div class="ttdef"><b>Definition:</b> image_view.hpp:53</div></div>
  51 <div class="ttc" id="classboost_1_1gil_1_1iterator__from__2d_html"><div class="ttname"><a href="classboost_1_1gil_1_1iterator__from__2d.html">boost::gil::iterator_from_2d</a></div><div class="ttdoc">Provides 1D random-access navigation to the pixels of the image. Models: PixelIteratorConcept,...</div><div class="ttdef"><b>Definition:</b> iterator_from_2d.hpp:42</div></div>
  52 <div class="ttc" id="classboost_1_1gil_1_1image__view_html_a2250401399336343c9b61c4a115bb6f7"><div class="ttname"><a href="classboost_1_1gil_1_1image__view.html#a2250401399336343c9b61c4a115bb6f7">boost::gil::image_view::back</a></div><div class="ttdeci">auto back() const -&gt; reference</div><div class="ttdoc">Returns a reference to the last element in raster order.</div><div class="ttdef"><b>Definition:</b> image_view.hpp:205</div></div>
  53 <div class="ttc" id="classboost_1_1gil_1_1image__view_html_a6abdcb0b8cadeb8f39806bd6413a2075"><div class="ttname"><a href="classboost_1_1gil_1_1image__view.html#a6abdcb0b8cadeb8f39806bd6413a2075">boost::gil::image_view::swap</a></div><div class="ttdeci">void swap(image_view&lt; Loc &gt; &amp;other)</div><div class="ttdoc">Exchanges the elements of the current view with those of other in constant time.</div><div class="ttdef"><b>Definition:</b> image_view.hpp:146</div></div>
  54 <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>
  55 <div class="ttc" id="classboost_1_1gil_1_1image__view_html_a644718bb2fb240de962dc3c9a1fdf0dc"><div class="ttname"><a href="classboost_1_1gil_1_1image__view.html#a644718bb2fb240de962dc3c9a1fdf0dc">boost::gil::image_view::empty</a></div><div class="ttdeci">bool empty() const</div><div class="ttdoc">Returns true if the view has no elements, false otherwise.</div><div class="ttdef"><b>Definition:</b> image_view.hpp:186</div></div>
  56 <div class="ttc" id="group___image_model_html_ga633557dbbff2d21c784b73412b47bb38"><div class="ttname"><a href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">boost::gil::view</a></div><div class="ttdeci">const image&lt; Pixel, IsPlanar, Alloc &gt;::view_t &amp; view(image&lt; Pixel, IsPlanar, Alloc &gt; &amp;img)</div><div class="ttdoc">Returns the non-constant-pixel view of an image.</div><div class="ttdef"><b>Definition:</b> image.hpp:443</div></div>
  57 <div class="ttc" id="structboost_1_1gil_1_1size_html"><div class="ttname"><a href="structboost_1_1gil_1_1size.html">boost::gil::size</a></div><div class="ttdoc">Returns an integral constant type specifying the number of elements in a color base.</div><div class="ttdef"><b>Definition:</b> color_base_algorithm.hpp:42</div></div>
  58 <div class="ttc" id="classboost_1_1gil_1_1point_html"><div class="ttname"><a href="classboost_1_1gil_1_1point.html">boost::gil::point&lt; std::ptrdiff_t &gt;</a></div></div>
  59 <div class="ttc" id="classboost_1_1gil_1_1image__view_html_a34d0cb181d67db75fc76cf2c86714c63"><div class="ttname"><a href="classboost_1_1gil_1_1image__view.html#a34d0cb181d67db75fc76cf2c86714c63">boost::gil::image_view::front</a></div><div class="ttdeci">auto front() const -&gt; reference</div><div class="ttdoc">Returns a reference to the first element in raster order.</div><div class="ttdef"><b>Definition:</b> image_view.hpp:195</div></div>
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