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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_PIXEL_ITERATOR_HPP</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor">#define BOOST_GIL_PIXEL_ITERATOR_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/concepts.hpp&gt;</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &lt;boost/gil/dynamic_step.hpp&gt;</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &lt;boost/gil/utilities.hpp&gt;</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &lt;boost/gil/pixel.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;iterator&gt;</span></div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#include &lt;type_traits&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="l00021"></a><span class="lineno">   21</span>&#160;<span class="comment">//forwarded declaration (as this file is included in step_iterator.hpp)</span></div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator&gt;</div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="keyword">class </span>memory_based_step_iterator;</div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;</div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> It&gt;</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="keyword">struct </span>is_iterator_adaptor : <span class="keyword">public</span> std::false_type {};</div><div class="line"><a name="l00029"></a><span class="lineno">   29</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> It&gt;</div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="keyword">struct </span>iterator_adaptor_get_base;</div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> It, <span class="keyword">typename</span> NewBaseIt&gt;</div><div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1iterator__adaptor__rebind.html">   36</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1iterator__adaptor__rebind.html">iterator_adaptor_rebind</a>;</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> It&gt;</div><div class="line"><a name="l00040"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1const__iterator__type.html">   40</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1const__iterator__type.html">const_iterator_type</a>;</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;</div><div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="comment">// The default implementation when the iterator is a C pointer is to use the standard constness semantics</span></div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt; <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1const__iterator__type.html">const_iterator_type</a>&lt;T*&gt;       { <span class="keyword">using</span> type = T <span class="keyword">const</span>*; };</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt; <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1const__iterator__type.html">const_iterator_type</a>&lt;T const*&gt; { <span class="keyword">using</span> type = T <span class="keyword">const</span>*; };</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;</div><div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> It&gt;</div><div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1iterator__is__mutable.html">   49</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1iterator__is__mutable.html">iterator_is_mutable</a>{};</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;<span class="comment">// The default implementation when the iterator is a C pointer is to use the standard constness semantics</span></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> T&gt;</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1iterator__is__mutable.html">iterator_is_mutable</a>&lt;T*&gt; : std::true_type {};</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">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="keyword">struct </span>iterator_is_mutable&lt;T const*&gt; : std::false_type {};</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;<span class="comment">//  HasDynamicXStepTypeConcept</span></div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;<span class="keyword">struct </span>dynamic_x_step_type&lt;Pixel*&gt; {</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    <span class="keyword">using</span> type = memory_based_step_iterator&lt;Pixel *&gt;;</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;</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> Pixel&gt;</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;<span class="keyword">struct </span>dynamic_x_step_type&lt;const Pixel*&gt; {</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    <span class="keyword">using</span> type = memory_based_step_iterator&lt;const Pixel *&gt;;</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;</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;<span class="comment">//  PixelBasedConcept</span></div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;<span class="keyword">struct </span>color_space_type&lt;Pixel*&gt; : color_space_type&lt;Pixel&gt; {};</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;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;<span class="keyword">struct </span>color_space_type&lt;Pixel const*&gt; : color_space_type&lt;Pixel&gt; {};</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> Pixel&gt;</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;<span class="keyword">struct </span>channel_mapping_type&lt;Pixel*&gt; : channel_mapping_type&lt;Pixel&gt; {};</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;<span class="keyword">struct </span>channel_mapping_type&lt;Pixel const*&gt; : channel_mapping_type&lt;Pixel&gt; {};</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;<span class="keyword">struct </span>is_planar&lt;Pixel*&gt; : is_planar&lt;Pixel&gt; {};</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;</div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;<span class="keyword">struct </span>is_planar&lt;Pixel const*&gt; : is_planar&lt;Pixel&gt; {};</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;</div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;<span class="comment">//  HomogeneousPixelBasedConcept</span></div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;<span class="keyword">struct </span>channel_type&lt;Pixel*&gt; : channel_type&lt;Pixel&gt; {};</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> Pixel&gt;</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;<span class="keyword">struct </span>channel_type&lt;Pixel const*&gt; : channel_type&lt;Pixel&gt; {};</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;<span class="comment">//  MemoryBasedIteratorConcept</span></div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;<span class="comment"></span></div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00124"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1byte__to__memunit.html">  124</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1byte__to__memunit.html">byte_to_memunit</a> : std::integral_constant&lt;int, 1&gt; {};</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> P&gt;</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;<span class="keyword">inline</span> std::ptrdiff_t memunit_step(P <span class="keyword">const</span>*) { <span class="keywordflow">return</span> <span class="keyword">sizeof</span>(P); }</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">template</span> &lt;<span class="keyword">typename</span> P&gt;</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;<span class="keyword">inline</span> std::ptrdiff_t memunit_distance(P <span class="keyword">const</span>* p1, P <span class="keyword">const</span>* p2)</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="keywordflow">return</span> (</div><div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;        gil_reinterpret_cast_c&lt;unsigned char const*&gt;(p2) -</div><div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;        gil_reinterpret_cast_c&lt;unsigned char const*&gt;(p1));</div><div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;}</div><div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;</div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> P&gt;</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;<span class="keyword">inline</span> <span class="keywordtype">void</span> memunit_advance(P* &amp;p, std::ptrdiff_t diff)</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;{</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;    p = (P*)((<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*)(p)+diff);</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;</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> P&gt;</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;<span class="keyword">inline</span> P* memunit_advanced(<span class="keyword">const</span> P* p, std::ptrdiff_t diff)</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="keywordflow">return</span> (P*)((<span class="keywordtype">char</span>*)(p)+diff);</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">//  memunit_advanced_ref</span></div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;<span class="comment">//  (shortcut to advancing a pointer by a given number of memunits and taking the reference in case the compiler is not smart enough)</span></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> P&gt;</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;<span class="keyword">inline</span> P&amp; memunit_advanced_ref(P* p, std::ptrdiff_t diff) {</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;    <span class="keywordflow">return</span> *memunit_advanced(p,diff);</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="comment">// namespace boost::gil</span></div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;<span class="preprocessor">#endif</span></div><div class="ttc" id="structboost_1_1gil_1_1byte__to__memunit_html"><div class="ttname"><a href="structboost_1_1gil_1_1byte__to__memunit.html">boost::gil::byte_to_memunit</a></div><div class="ttdef"><b>Definition:</b> pixel_iterator.hpp:124</div></div>
  51 <div class="ttc" id="structboost_1_1gil_1_1iterator__adaptor__rebind_html"><div class="ttname"><a href="structboost_1_1gil_1_1iterator__adaptor__rebind.html">boost::gil::iterator_adaptor_rebind</a></div><div class="ttdoc">Changes the base iterator of an iterator adaptor. Provide an specialization when introducing new iter...</div><div class="ttdef"><b>Definition:</b> pixel_iterator.hpp:36</div></div>
  52 <div class="ttc" id="structboost_1_1gil_1_1iterator__is__mutable_html"><div class="ttname"><a href="structboost_1_1gil_1_1iterator__is__mutable.html">boost::gil::iterator_is_mutable</a></div><div class="ttdoc">Metafunction predicate returning whether the given iterator allows for changing its values.</div><div class="ttdef"><b>Definition:</b> pixel_iterator.hpp:49</div></div>
  53 <div class="ttc" id="structboost_1_1gil_1_1const__iterator__type_html"><div class="ttname"><a href="structboost_1_1gil_1_1const__iterator__type.html">boost::gil::const_iterator_type</a></div><div class="ttdoc">Returns the type of an iterator just like the input iterator, except operating over immutable values.</div><div class="ttdef"><b>Definition:</b> pixel_iterator.hpp:40</div></div>
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