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  47 <div class="title">virtual_locator.hpp</div>  </div>
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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_VIRTUAL_LOCATOR_HPP</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor">#define BOOST_GIL_VIRTUAL_LOCATOR_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/position_iterator.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;<span class="preprocessor">#include &lt;boost/iterator/iterator_facade.hpp&gt;</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {</div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> DerefFn, <span class="keywordtype">bool</span> IsTransposed&gt;</div><div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1virtual__2d__locator.html">   32</a></span>&#160;<span class="keyword">class </span><a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator</a></div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;    : <span class="keyword">public</span> <a class="code" href="classboost_1_1gil_1_1pixel__2d__locator__base.html">pixel_2d_locator_base</a></div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;        &lt;</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;            virtual_2d_locator&lt;DerefFn, IsTransposed&gt;,</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;            position_iterator&lt;DerefFn, IsTransposed&gt;,</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;            position_iterator&lt;DerefFn, 1-IsTransposed&gt;</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;        &gt;</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;{</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;    <span class="keyword">using</span> <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">this_t</a> = <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator&lt;DerefFn, IsTransposed&gt;</a>;</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="keyword">public</span>:</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;    <span class="keyword">using</span> <a class="code" href="classboost_1_1gil_1_1pixel__2d__locator__base.html">parent_t</a> = <a class="code" href="classboost_1_1gil_1_1pixel__2d__locator__base.html">pixel_2d_locator_base</a></div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;        &lt;</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;            <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator&lt;DerefFn, IsTransposed&gt;</a>,</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;            <a class="code" href="structboost_1_1gil_1_1position__iterator.html">position_iterator&lt;DerefFn, IsTransposed&gt;</a>,</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;            <a class="code" href="structboost_1_1gil_1_1position__iterator.html">position_iterator</a>&lt;DerefFn, 1-IsTransposed&gt;</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;        &gt;;</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    <span class="keyword">using</span> <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">const_t</a> = <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator&lt;typename DerefFn::const_t, IsTransposed&gt;</a>;</div><div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;    <span class="keyword">using</span> deref_fn_t = DerefFn;</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;    <span class="keyword">using</span> point_t = <span class="keyword">typename</span> <a class="code" href="classboost_1_1gil_1_1point.html">parent_t::point_t</a>;</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    <span class="keyword">using</span> coord_t = <span class="keyword">typename</span> parent_t::coord_t;</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    <span class="keyword">using</span> x_coord_t = <span class="keyword">typename</span> parent_t::x_coord_t;</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    <span class="keyword">using</span> y_coord_t = <span class="keyword">typename</span> parent_t::y_coord_t;</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    <span class="keyword">using</span> x_iterator = <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1position__iterator.html">parent_t::x_iterator</a>;</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;    <span class="keyword">using</span> y_iterator = <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1position__iterator.html">parent_t::y_iterator</a>;</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> NewDerefFn&gt;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    <span class="keyword">struct </span>add_deref</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    {</div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;        <span class="keyword">using</span> type = <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator&lt;deref_compose&lt;NewDerefFn, DerefFn&gt;</a>, IsTransposed&gt;;</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;        <span class="keyword">static</span> type make(<a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">this_t</a> <span class="keyword">const</span>&amp; loc, NewDerefFn <span class="keyword">const</span>&amp; new_deref_fn)</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        {</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;            <span class="keywordflow">return</span> type(loc.pos(), loc.step(),</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;                <a class="code" href="classboost_1_1gil_1_1deref__compose.html">deref_compose&lt;NewDerefFn, DerefFn&gt;</a>(new_deref_fn, loc.deref_fn()));</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;    };</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;    <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator</a>(</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;        point_t <span class="keyword">const</span>&amp; p = {0, 0},</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;        point_t <span class="keyword">const</span>&amp; step = {1, 1},</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;        deref_fn_t <span class="keyword">const</span>&amp; deref_fn = deref_fn_t())</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;        : y_pos_(p, step, deref_fn)</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    {}</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> D, <span class="keywordtype">bool</span> TR&gt;</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator</a>(<a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator&lt;D, TR&gt;</a> <span class="keyword">const</span> &amp;loc, coord_t y_step)</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;        : y_pos_(loc.pos(), point_t(loc.step().x, loc.step().y * y_step), loc.deref_fn())</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="l00081"></a><span class="lineno">   81</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> D, <span class="keywordtype">bool</span> TR&gt;</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator</a>(<a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator&lt;D, TR&gt;</a> <span class="keyword">const</span>&amp; loc, coord_t x_step, coord_t y_step, <span class="keywordtype">bool</span> transpose = <span class="keyword">false</span>)</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;        : y_pos_(loc.pos()</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;        , transpose ?</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;            point_t(loc.step().x * y_step, loc.step().y * x_step) :</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;            point_t(loc.step().x * x_step, loc.step().y * y_step)</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;        , loc.deref_fn())</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;    {</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;        BOOST_ASSERT(transpose == (IsTransposed != TR));</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;    }</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> D, <span class="keywordtype">bool</span> TR&gt;</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;    <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator</a>(<a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator&lt;D, TR&gt;</a> <span class="keyword">const</span>&amp; other) : y_pos_(other.y_pos_) {}</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;    <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator</a>(<a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator</a> <span class="keyword">const</span>&amp; other) : y_pos_(other.y_pos_) {}</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator</a>&amp; operator=(<a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">virtual_2d_locator</a> <span class="keyword">const</span>&amp; other) = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;    <span class="keywordtype">bool</span> operator==(<span class="keyword">const</span> <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">this_t</a>&amp; p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> y_pos_ == p.y_pos_; }</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    <span class="keyword">auto</span> x() -&gt; x_iterator&amp;</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="keywordflow">return</span> *gil_reinterpret_cast&lt;x_iterator*&gt;(<span class="keyword">this</span>);</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;    }</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    <span class="keyword">auto</span> x() <span class="keyword">const</span> -&gt; x_iterator <span class="keyword">const</span>&amp;</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;    {</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;        <span class="keywordflow">return</span> *gil_reinterpret_cast_c&lt;x_iterator const*&gt;(<span class="keyword">this</span>);</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">auto</span> y() -&gt; y_iterator&amp; { <span class="keywordflow">return</span> y_pos_; }</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;    <span class="keyword">auto</span> y() <span class="keyword">const</span> -&gt; y_iterator <span class="keyword">const</span>&amp; { <span class="keywordflow">return</span> y_pos_; }</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;</div><div class="line"><a name="l00114"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1virtual__2d__locator.html#a250806294188ba94e50e45a3c67aa0ab">  114</a></span>&#160;    <span class="keyword">auto</span> <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html#a250806294188ba94e50e45a3c67aa0ab">y_distance_to</a>(<a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html">this_t</a> <span class="keyword">const</span>&amp; it2, x_coord_t) <span class="keyword">const</span> -&gt; y_coord_t</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    {</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;        <span class="keywordflow">return</span> (it2.pos()[1 - IsTransposed] - pos()[1 - IsTransposed])</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;                / step()[1 - IsTransposed];</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    }</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;</div><div class="line"><a name="l00122"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1virtual__2d__locator.html#a5b6f376ae8856b9fdd19bd68b80a1cb0">  122</a></span>&#160;    <span class="keywordtype">bool</span> <a class="code" href="classboost_1_1gil_1_1virtual__2d__locator.html#a5b6f376ae8856b9fdd19bd68b80a1cb0">is_1d_traversable</a>(x_coord_t)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <span class="keyword">false</span>; }</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;    <span class="comment">// Methods specific for virtual 2D locator</span></div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;    <span class="keyword">auto</span> pos() const -&gt; <a class="code" href="classboost_1_1gil_1_1point.html">point_t</a> const&amp; { <span class="keywordflow">return</span> y_pos_.pos(); }</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;    <span class="keyword">auto</span> step() const -&gt; point_t const&amp; { <span class="keywordflow">return</span> y_pos_.step(); }</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;    <span class="keyword">auto</span> deref_fn() const -&gt; deref_fn_t const&amp; { <span class="keywordflow">return</span> y_pos_.deref_fn(); }</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">private</span>:</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;    <span class="keyword">template</span> &lt;<span class="keyword">typename</span> D, <span class="keywordtype">bool</span> TR&gt;</div><div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;    <span class="keyword">friend</span> <span class="keyword">class </span>virtual_2d_locator;</div><div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;    y_iterator y_pos_; <span class="comment">// current position, the step and the dereference object</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;</div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;<span class="comment">//  PixelBasedConcept</span></div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> D, <span class="keywordtype">bool</span> TR&gt;</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;<span class="keyword">struct </span>channel_type&lt;virtual_2d_locator&lt;D, TR&gt;&gt;</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    : channel_type&lt;typename virtual_2d_locator&lt;D, TR&gt;::parent_t&gt;</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;{</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;};</div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;</div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> D, <span class="keywordtype">bool</span> TR&gt;</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;<span class="keyword">struct </span>color_space_type&lt;virtual_2d_locator&lt;D, TR&gt;&gt;</div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;    : color_space_type&lt;typename virtual_2d_locator&lt;D, TR&gt;::parent_t&gt;</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;{</div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;};</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">template</span> &lt;<span class="keyword">typename</span> D, <span class="keywordtype">bool</span> TR&gt;</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;<span class="keyword">struct </span>channel_mapping_type&lt;virtual_2d_locator&lt;D, TR&gt;&gt;</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;    : channel_mapping_type&lt;typename virtual_2d_locator&lt;D, TR&gt;::parent_t&gt;</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;</div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> D, <span class="keywordtype">bool</span> TR&gt;</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;<span class="keyword">struct </span>is_planar&lt;virtual_2d_locator&lt;D, TR&gt;&gt;</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;    : is_planar&lt;typename virtual_2d_locator&lt;D, TR&gt;::parent_t&gt;</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;};</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;<span class="comment">//  HasDynamicXStepTypeConcept</span></div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;<span class="comment"></span></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> D, <span class="keywordtype">bool</span> TR&gt;</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;<span class="keyword">struct </span>dynamic_x_step_type&lt;virtual_2d_locator&lt;D,TR&gt;&gt;</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;    <span class="keyword">using</span> type = virtual_2d_locator&lt;D,TR&gt;;</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;};</div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;<span class="comment">//  HasDynamicYStepTypeConcept</span></div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> D, <span class="keywordtype">bool</span> TR&gt;</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;<span class="keyword">struct </span>dynamic_y_step_type&lt;virtual_2d_locator&lt;D,TR&gt;&gt;</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">using</span> type = virtual_2d_locator&lt;D,TR&gt;;</div><div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;};</div><div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;<span class="comment">//  HasTransposedTypeConcept</span></div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> D, <span class="keywordtype">bool</span> IsTransposed&gt;</div><div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;<span class="keyword">struct </span>transposed_type&lt;virtual_2d_locator&lt;D,IsTransposed&gt;&gt;</div><div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;{</div><div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160;    <span class="keyword">using</span> type = virtual_2d_locator&lt;D,1-IsTransposed&gt;;</div><div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;};</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="comment">// namespace boost::gil</span></div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;</div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;<span class="preprocessor">#endif</span></div><div class="ttc" id="classboost_1_1gil_1_1pixel__2d__locator__base_html"><div class="ttname"><a href="classboost_1_1gil_1_1pixel__2d__locator__base.html">boost::gil::pixel_2d_locator_base</a></div><div class="ttdoc">base class for models of PixelLocatorConceptPixel locator is similar to a pixel iterator,...</div><div class="ttdef"><b>Definition:</b> locator.hpp:109</div></div>
  51 <div class="ttc" id="structboost_1_1gil_1_1position__iterator_html"><div class="ttname"><a href="structboost_1_1gil_1_1position__iterator.html">boost::gil::position_iterator</a></div><div class="ttdoc">An iterator that remembers its current X,Y position and invokes a function object with it upon derefe...</div><div class="ttdef"><b>Definition:</b> position_iterator.hpp:31</div></div>
  52 <div class="ttc" id="classboost_1_1gil_1_1virtual__2d__locator_html"><div class="ttname"><a href="classboost_1_1gil_1_1virtual__2d__locator.html">boost::gil::virtual_2d_locator</a></div><div class="ttdoc">A 2D locator over a virtual image Upon dereferencing, invokes a given function object passing it its ...</div><div class="ttdef"><b>Definition:</b> virtual_locator.hpp:32</div></div>
  53 <div class="ttc" id="classboost_1_1gil_1_1virtual__2d__locator_html_a250806294188ba94e50e45a3c67aa0ab"><div class="ttname"><a href="classboost_1_1gil_1_1virtual__2d__locator.html#a250806294188ba94e50e45a3c67aa0ab">boost::gil::virtual_2d_locator::y_distance_to</a></div><div class="ttdeci">auto y_distance_to(this_t const &amp;it2, x_coord_t) const -&gt; y_coord_t</div><div class="ttdoc">Returns the y distance between two x_iterators given the difference of their x positions.</div><div class="ttdef"><b>Definition:</b> virtual_locator.hpp:114</div></div>
  54 <div class="ttc" id="classboost_1_1gil_1_1virtual__2d__locator_html_a5b6f376ae8856b9fdd19bd68b80a1cb0"><div class="ttname"><a href="classboost_1_1gil_1_1virtual__2d__locator.html#a5b6f376ae8856b9fdd19bd68b80a1cb0">boost::gil::virtual_2d_locator::is_1d_traversable</a></div><div class="ttdeci">bool is_1d_traversable(x_coord_t) const</div><div class="ttdef"><b>Definition:</b> virtual_locator.hpp:122</div></div>
  55 <div class="ttc" id="classboost_1_1gil_1_1deref__compose_html"><div class="ttname"><a href="classboost_1_1gil_1_1deref__compose.html">boost::gil::deref_compose</a></div><div class="ttdoc">Composes two dereference function objects. Similar to std::unary_compose but needs to pull some alias...</div><div class="ttdef"><b>Definition:</b> utilities.hpp:121</div></div>
  56 <div class="ttc" id="classboost_1_1gil_1_1point_html"><div class="ttname"><a href="classboost_1_1gil_1_1point.html">boost::gil::point</a></div><div class="ttdoc">2D point both axes of which have the same dimension typeModels: Point2DConcept</div><div class="ttdef"><b>Definition:</b> locator.hpp:28</div></div>
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