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<div class="title">memory_based_step_iterator&lt; Iterator &gt; Class Template Reference<div class="ingroups"><a class="el" href="group___pixel_iterator.html">Pixel Iterator</a> &raquo; <a class="el" href="group___pixel_iterator_model.html">Models</a> &raquo; <a class="el" href="group___pixel_iterator_model_step_ptr.html">step iterators</a><a class="el" href="group___pixel_based.html">PixelBased</a> &raquo;  &#124; <a class="el" href="group___pixel_based_model.html">Models</a></div></div>  </div>
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<p>MEMORY-BASED STEP ITERATOR.  
 <a href="classboost_1_1gil_1_1memory__based__step__iterator.html#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="step__iterator_8hpp_source.html">step_iterator.hpp</a>&gt;</code></p>
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Inheritance diagram for memory_based_step_iterator&lt; Iterator &gt;:</div>
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Public Types</h2></td></tr>
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using&#160;</td><td class="memItemRight" valign="bottom"><b>parent_t</b> = <a class="el" href="classboost_1_1gil_1_1detail_1_1step__iterator__adaptor.html">detail::step_iterator_adaptor</a>&lt; <a class="el" href="classboost_1_1gil_1_1memory__based__step__iterator.html">memory_based_step_iterator</a>&lt; Iterator &gt;, Iterator, <a class="el" href="structboost_1_1gil_1_1memunit__step__fn.html">memunit_step_fn</a>&lt; Iterator &gt; &gt;</td></tr>
<tr class="separator:acb04528fb0a39aa9aaed8ae8cb19ab02"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:afd3670b743c9f80b9c2f6b3ccb5fe37c"><td class="memItemLeft" align="right" valign="top"><a id="afd3670b743c9f80b9c2f6b3ccb5fe37c"></a>
using&#160;</td><td class="memItemRight" valign="bottom"><b>reference</b> = typename parent_t::reference</td></tr>
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using&#160;</td><td class="memItemRight" valign="bottom"><b>difference_type</b> = typename parent_t::difference_type</td></tr>
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using&#160;</td><td class="memItemRight" valign="bottom"><b>x_iterator</b> = Iterator</td></tr>
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<tr class="inherit_header pub_types_classboost_1_1gil_1_1detail_1_1step__iterator__adaptor"><td colspan="2" onclick="javascript:toggleInherit('pub_types_classboost_1_1gil_1_1detail_1_1step__iterator__adaptor')"><img src="closed.png" alt="-"/>&#160;Public Types inherited from <a class="el" href="classboost_1_1gil_1_1detail_1_1step__iterator__adaptor.html">step_iterator_adaptor&lt; memory_based_step_iterator&lt; Iterator &gt;, Iterator, memunit_step_fn&lt; Iterator &gt; &gt;</a></td></tr>
<tr class="memitem:aaddc7de362ea82f391ca5035f9d418da inherit pub_types_classboost_1_1gil_1_1detail_1_1step__iterator__adaptor"><td class="memItemLeft" align="right" valign="top"><a id="aaddc7de362ea82f391ca5035f9d418da"></a>
using&#160;</td><td class="memItemRight" valign="bottom"><b>parent_t</b> = iterator_adaptor&lt; <a class="el" href="classboost_1_1gil_1_1memory__based__step__iterator.html">memory_based_step_iterator</a>&lt; Iterator &gt;, Iterator, use_default, use_default, use_default, typename <a class="el" href="structboost_1_1gil_1_1memunit__step__fn.html">memunit_step_fn</a>&lt; Iterator &gt; ::difference_type &gt;</td></tr>
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using&#160;</td><td class="memItemRight" valign="bottom"><b>base_difference_type</b> = typename std::iterator_traits&lt; Iterator &gt;::difference_type</td></tr>
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<tr class="memitem:a8254ddd51f36f5f0dd01c55b45ee5c89 inherit pub_types_classboost_1_1gil_1_1detail_1_1step__iterator__adaptor"><td class="memItemLeft" align="right" valign="top"><a id="a8254ddd51f36f5f0dd01c55b45ee5c89"></a>
using&#160;</td><td class="memItemRight" valign="bottom"><b>difference_type</b> = typename <a class="el" href="structboost_1_1gil_1_1memunit__step__fn.html">memunit_step_fn</a>&lt; Iterator &gt; ::difference_type</td></tr>
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using&#160;</td><td class="memItemRight" valign="bottom"><b>reference</b> = typename std::iterator_traits&lt; Iterator &gt;::reference</td></tr>
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Public Member Functions</h2></td></tr>
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&#160;</td><td class="memItemRight" valign="bottom"><b>memory_based_step_iterator</b> (Iterator it, std::ptrdiff_t memunit_step)</td></tr>
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template&lt;typename I2 &gt; </td></tr>
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<tr class="memitem:a16d8e6857dd561244ca73764f2b94801"><td class="memItemLeft" align="right" valign="top">reference&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classboost_1_1gil_1_1memory__based__step__iterator.html#a16d8e6857dd561244ca73764f2b94801">operator[]</a> (difference_type d) const</td></tr>
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void&#160;</td><td class="memItemRight" valign="bottom"><b>set_step</b> (std::ptrdiff_t memunit_step)</td></tr>
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x_iterator &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>base</b> ()</td></tr>
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x_iterator const  &amp;&#160;</td><td class="memItemRight" valign="bottom"><b>base</b> () const</td></tr>
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<tr class="inherit_header pub_methods_classboost_1_1gil_1_1detail_1_1step__iterator__adaptor"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classboost_1_1gil_1_1detail_1_1step__iterator__adaptor')"><img src="closed.png" alt="-"/>&#160;Public Member Functions inherited from <a class="el" href="classboost_1_1gil_1_1detail_1_1step__iterator__adaptor.html">step_iterator_adaptor&lt; memory_based_step_iterator&lt; Iterator &gt;, Iterator, memunit_step_fn&lt; Iterator &gt; &gt;</a></td></tr>
<tr class="memitem:a15fe6eaea1e52b8f3d3e18c8abf8ada9 inherit pub_methods_classboost_1_1gil_1_1detail_1_1step__iterator__adaptor"><td class="memItemLeft" align="right" valign="top"><a id="a15fe6eaea1e52b8f3d3e18c8abf8ada9"></a>
&#160;</td><td class="memItemRight" valign="bottom"><b>step_iterator_adaptor</b> (const Iterator &amp;it, <a class="el" href="structboost_1_1gil_1_1memunit__step__fn.html">memunit_step_fn</a>&lt; Iterator &gt; step_fn=<a class="el" href="structboost_1_1gil_1_1memunit__step__fn.html">memunit_step_fn</a>&lt; Iterator &gt;())</td></tr>
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difference_type&#160;</td><td class="memItemRight" valign="bottom"><b>step</b> () const</td></tr>
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Additional Inherited Members</h2></td></tr>
<tr class="inherit_header pro_attribs_classboost_1_1gil_1_1detail_1_1step__iterator__adaptor"><td colspan="2" onclick="javascript:toggleInherit('pro_attribs_classboost_1_1gil_1_1detail_1_1step__iterator__adaptor')"><img src="closed.png" alt="-"/>&#160;Protected Attributes inherited from <a class="el" href="classboost_1_1gil_1_1detail_1_1step__iterator__adaptor.html">step_iterator_adaptor&lt; memory_based_step_iterator&lt; Iterator &gt;, Iterator, memunit_step_fn&lt; Iterator &gt; &gt;</a></td></tr>
<tr class="memitem:aa6f3d4cf659c02cbee3b014d8d9dc90c inherit pro_attribs_classboost_1_1gil_1_1detail_1_1step__iterator__adaptor"><td class="memItemLeft" align="right" valign="top"><a id="aa6f3d4cf659c02cbee3b014d8d9dc90c"></a>
<a class="el" href="structboost_1_1gil_1_1memunit__step__fn.html">memunit_step_fn</a>&lt; Iterator &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>_step_fn</b></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><h3>template&lt;typename Iterator&gt;<br />
class boost::gil::memory_based_step_iterator&lt; Iterator &gt;</h3>

<p>MEMORY-BASED STEP ITERATOR. </p>
<p>Iterator with dynamically specified step in memory units (bytes or bits). Models <a class="el" href="structboost_1_1gil_1_1_step_iterator_concept.html" title="Step iterator concept.">StepIteratorConcept</a>, <a class="el" href="structboost_1_1gil_1_1_iterator_adaptor_concept.html" title="Iterator adaptor is a forward iterator adapting another forward iterator.">IteratorAdaptorConcept</a>, <a class="el" href="structboost_1_1gil_1_1_memory_based_iterator_concept.html" title="Concept of a random-access iterator that can be advanced in memory units (bytes or bits)">MemoryBasedIteratorConcept</a>, <a class="el" href="structboost_1_1gil_1_1_pixel_iterator_concept.html" title="An STL random access traversal iterator over a model of PixelConcept.">PixelIteratorConcept</a>, <a class="el" href="structboost_1_1gil_1_1_has_dynamic_x_step_type_concept.html" title="Concept for iterators, locators and views that can define a type just like the given iterator,...">HasDynamicXStepTypeConcept</a></p>
<p>A refinement of step_iterator_adaptor that uses a dynamic parameter for the step which is specified in memory units, such as bytes or bits</p>
<p>Pixel step iterators are used to provide iteration over non-adjacent pixels. Common use is a vertical traversal, where the step is the row stride.</p>
<p>Another application is as a sub-channel view. For example, a red intensity image over interleaved RGB data would use a step iterator adaptor with step sizeof(channel_t)*3 In the latter example the step size could be fixed at compile time for efficiency. Compile-time fixed step can be implemented by providing a step function object that takes the step as a template </p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="a16d8e6857dd561244ca73764f2b94801"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a16d8e6857dd561244ca73764f2b94801">&#9670;&nbsp;</a></span>operator[]()</h2>

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          <td class="memname">reference operator[] </td>
          <td>(</td>
          <td class="paramtype">difference_type&#160;</td>
          <td class="paramname"><em>d</em></td><td>)</td>
          <td> const</td>
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<span class="mlabels"><span class="mlabel">inline</span></span>  </td>
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<p>For some reason operator[] provided by iterator_adaptor returns a custom class that is convertible to reference We require our own reference because it is registered in iterator_traits </p>

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<hr/>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="algorithm_8hpp_source.html">algorithm.hpp</a></li>
<li><a class="el" href="step__iterator_8hpp_source.html">step_iterator.hpp</a></li>
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