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| <h1>pixel_iterator.hpp</h1><a href="g_i_l_0243.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span> |
| <a name="l00002"></a>00002 <span class="comment"> Copyright 2005-2007 Adobe Systems Incorporated</span> |
| <a name="l00003"></a>00003 <span class="comment"> </span> |
| <a name="l00004"></a>00004 <span class="comment"> Use, modification and distribution are subject to the Boost Software License,</span> |
| <a name="l00005"></a>00005 <span class="comment"> Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at</span> |
| <a name="l00006"></a>00006 <span class="comment"> http://www.boost.org/LICENSE_1_0.txt).</span> |
| <a name="l00007"></a>00007 <span class="comment"></span> |
| <a name="l00008"></a>00008 <span class="comment"> See http://opensource.adobe.com/gil for most recent version including documentation.</span> |
| <a name="l00009"></a>00009 <span class="comment">*/</span> |
| <a name="l00010"></a>00010 |
| <a name="l00011"></a>00011 <span class="comment">/*************************************************************************************************/</span> |
| <a name="l00012"></a>00012 |
| <a name="l00013"></a>00013 <span class="preprocessor">#ifndef GIL_PIXEL_ITERATOR_H</span> |
| <a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#define GIL_PIXEL_ITERATOR_H</span> |
| <a name="l00015"></a>00015 <span class="preprocessor"></span> |
| <a name="l00024"></a>00024 |
| <a name="l00025"></a>00025 <span class="preprocessor">#include <cassert></span> |
| <a name="l00026"></a>00026 <span class="preprocessor">#include <iterator></span> |
| <a name="l00027"></a>00027 <span class="preprocessor">#include "<a class="code" href="g_i_l_0094.html" title="GIL configuration file.">gil_config.hpp</a>"</span> |
| <a name="l00028"></a>00028 <span class="preprocessor">#include "<a class="code" href="g_i_l_0092.html" title="Concept check classes for GIL concepts.">gil_concept.hpp</a>"</span> |
| <a name="l00029"></a>00029 <span class="preprocessor">#include "<a class="code" href="utilities_8hpp.html" title="Various utilities not specific to the image library. Some are non-standard STL extensions...">utilities.hpp</a>"</span> |
| <a name="l00030"></a>00030 <span class="preprocessor">#include "<a class="code" href="pixel_8hpp.html" title="pixel class and related utilities">pixel.hpp</a>"</span> |
| <a name="l00031"></a>00031 |
| <a name="l00032"></a>00032 <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil { |
| <a name="l00033"></a>00033 |
| <a name="l00034"></a>00034 <span class="comment">//forwarded declaration (as this file is included in step_iterator.hpp)</span> |
| <a name="l00035"></a>00035 <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator> |
| <a name="l00036"></a>00036 <span class="keyword">class </span>memory_based_step_iterator; |
| <a name="l00037"></a>00037 |
| <a name="l00038"></a>00038 <span class="keyword">template</span> <<span class="keyword">typename</span> Iterator> <span class="keyword">struct </span>dynamic_x_step_type; |
| <a name="l00039"></a>00039 |
| <a name="l00042"></a>00042 <span class="keyword">template</span> <<span class="keyword">typename</span> It> |
| <a name="l00043"></a><a class="code" href="g_i_l_0541.html">00043</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0541.html" title="metafunction predicate determining whether the given iterator is a plain one or an...">is_iterator_adaptor</a> : <span class="keyword">public</span> mpl::false_{}; |
| <a name="l00044"></a>00044 |
| <a name="l00046"></a>00046 <span class="keyword">template</span> <<span class="keyword">typename</span> It> |
| <a name="l00047"></a>00047 <span class="keyword">struct </span>iterator_adaptor_get_base; |
| <a name="l00048"></a>00048 |
| <a name="l00050"></a>00050 <span class="keyword">template</span> <<span class="keyword">typename</span> It, <span class="keyword">typename</span> NewBaseIt> |
| <a name="l00051"></a>00051 <span class="keyword">struct </span>iterator_adaptor_rebind; |
| <a name="l00052"></a>00052 |
| <a name="l00054"></a>00054 <span class="keyword">template</span> <<span class="keyword">typename</span> It> |
| <a name="l00055"></a>00055 <span class="keyword">struct </span>const_iterator_type; |
| <a name="l00056"></a>00056 |
| <a name="l00057"></a>00057 <span class="comment">// The default implementation when the iterator is a C pointer is to use the standard constness semantics</span> |
| <a name="l00058"></a>00058 <span class="keyword">template</span> <<span class="keyword">typename</span> T> <span class="keyword">struct </span>const_iterator_type< T*> { <span class="keyword">typedef</span> <span class="keyword">const</span> T* type; }; |
| <a name="l00059"></a>00059 <span class="keyword">template</span> <<span class="keyword">typename</span> T> <span class="keyword">struct </span>const_iterator_type<const T*> { <span class="keyword">typedef</span> <span class="keyword">const</span> T* type; }; |
| <a name="l00060"></a>00060 |
| <a name="l00063"></a>00063 <span class="keyword">template</span> <<span class="keyword">typename</span> It> |
| <a name="l00064"></a><a class="code" href="g_i_l_0550.html">00064</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0550.html" title="Metafunction predicate returning whether the given iterator allows for changing its...">iterator_is_mutable</a>{}; |
| <a name="l00065"></a>00065 |
| <a name="l00066"></a>00066 <span class="comment">// The default implementation when the iterator is a C pointer is to use the standard constness semantics</span> |
| <a name="l00067"></a>00067 <span class="keyword">template</span> <<span class="keyword">typename</span> T> <span class="keyword">struct </span><a class="code" href="g_i_l_0550.html" title="Metafunction predicate returning whether the given iterator allows for changing its...">iterator_is_mutable</a>< T*> : <span class="keyword">public</span> mpl::true_{}; |
| <a name="l00068"></a>00068 <span class="keyword">template</span> <<span class="keyword">typename</span> T> <span class="keyword">struct </span>iterator_is_mutable<const T*> : <span class="keyword">public</span> mpl::false_{}; |
| <a name="l00069"></a>00069 |
| <a name="l00074"></a>00074 |
| <a name="l00075"></a>00075 |
| <a name="l00076"></a>00076 |
| <a name="l00078"></a>00078 <span class="comment">// HasDynamicXStepTypeConcept</span> |
| <a name="l00080"></a>00080 <span class="comment"></span> |
| <a name="l00082"></a>00082 <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel> |
| <a name="l00083"></a>00083 <span class="keyword">struct </span>dynamic_x_step_type<Pixel*> { |
| <a name="l00084"></a>00084 <span class="keyword">typedef</span> memory_based_step_iterator<Pixel*> type; |
| <a name="l00085"></a>00085 }; |
| <a name="l00086"></a>00086 |
| <a name="l00088"></a>00088 <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel> |
| <a name="l00089"></a>00089 <span class="keyword">struct </span>dynamic_x_step_type<const Pixel*> { |
| <a name="l00090"></a>00090 <span class="keyword">typedef</span> memory_based_step_iterator<const Pixel*> type; |
| <a name="l00091"></a>00091 }; |
| <a name="l00092"></a>00092 |
| <a name="l00093"></a>00093 |
| <a name="l00095"></a>00095 <span class="comment">// PixelBasedConcept</span> |
| <a name="l00097"></a>00097 <span class="comment"></span> |
| <a name="l00098"></a>00098 <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel> <span class="keyword">struct </span>color_space_type< Pixel*> : <span class="keyword">public</span> color_space_type<Pixel> {}; |
| <a name="l00099"></a>00099 <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel> <span class="keyword">struct </span>color_space_type<const Pixel*> : <span class="keyword">public</span> color_space_type<Pixel> {}; |
| <a name="l00100"></a>00100 |
| <a name="l00101"></a>00101 <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel> <span class="keyword">struct </span>channel_mapping_type< Pixel*> : <span class="keyword">public</span> channel_mapping_type<Pixel> {}; |
| <a name="l00102"></a>00102 <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel> <span class="keyword">struct </span>channel_mapping_type<const Pixel*> : <span class="keyword">public</span> channel_mapping_type<Pixel> {}; |
| <a name="l00103"></a>00103 |
| <a name="l00104"></a>00104 <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel> <span class="keyword">struct </span>is_planar< Pixel*> : <span class="keyword">public</span> is_planar<Pixel> {}; |
| <a name="l00105"></a>00105 <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel> <span class="keyword">struct </span>is_planar<const Pixel*> : <span class="keyword">public</span> is_planar<Pixel> {}; |
| <a name="l00106"></a>00106 |
| <a name="l00108"></a>00108 <span class="comment">// HomogeneousPixelBasedConcept</span> |
| <a name="l00110"></a>00110 <span class="comment"></span> |
| <a name="l00111"></a>00111 <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel> <span class="keyword">struct </span>channel_type<Pixel*> : <span class="keyword">public</span> channel_type<Pixel> {}; |
| <a name="l00112"></a>00112 <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel> <span class="keyword">struct </span>channel_type<const Pixel*> : <span class="keyword">public</span> channel_type<Pixel> {}; |
| <a name="l00113"></a>00113 |
| <a name="l00120"></a>00120 |
| <a name="l00122"></a>00122 <span class="comment">// MemoryBasedIteratorConcept</span> |
| <a name="l00124"></a>00124 <span class="comment"></span> |
| <a name="l00125"></a>00125 <span class="keyword">template</span> <<span class="keyword">typename</span> T> |
| <a name="l00126"></a><a class="code" href="g_i_l_0406.html">00126</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0406.html">byte_to_memunit</a> : <span class="keyword">public</span> mpl::int_<1> {}; |
| <a name="l00127"></a>00127 |
| <a name="l00128"></a>00128 <span class="keyword">template</span> <<span class="keyword">typename</span> P> |
| <a name="l00129"></a>00129 <span class="keyword">inline</span> std::ptrdiff_t memunit_step(<span class="keyword">const</span> P*) { <span class="keywordflow">return</span> <span class="keyword">sizeof</span>(P); } |
| <a name="l00130"></a>00130 |
| <a name="l00131"></a>00131 <span class="keyword">template</span> <<span class="keyword">typename</span> P> |
| <a name="l00132"></a>00132 <span class="keyword">inline</span> std::ptrdiff_t memunit_distance(<span class="keyword">const</span> P* p1, <span class="keyword">const</span> P* p2) { |
| <a name="l00133"></a>00133 <span class="keywordflow">return</span> (gil_reinterpret_cast_c<const unsigned char*>(p2)-gil_reinterpret_cast_c<const unsigned char*>(p1)); |
| <a name="l00134"></a>00134 } |
| <a name="l00135"></a>00135 |
| <a name="l00136"></a>00136 <span class="keyword">template</span> <<span class="keyword">typename</span> P> |
| <a name="l00137"></a>00137 <span class="keyword">inline</span> <span class="keywordtype">void</span> memunit_advance(P* &p, std::ptrdiff_t diff) { |
| <a name="l00138"></a>00138 p=(P*)((<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*)(p)+diff); |
| <a name="l00139"></a>00139 } |
| <a name="l00140"></a>00140 |
| <a name="l00141"></a>00141 <span class="keyword">template</span> <<span class="keyword">typename</span> P> |
| <a name="l00142"></a>00142 <span class="keyword">inline</span> P* memunit_advanced(<span class="keyword">const</span> P* p, std::ptrdiff_t diff) { |
| <a name="l00143"></a>00143 <span class="keywordflow">return</span> (P*)((<span class="keywordtype">char</span>*)(p)+diff); |
| <a name="l00144"></a>00144 } |
| <a name="l00145"></a>00145 |
| <a name="l00146"></a>00146 <span class="comment">// memunit_advanced_ref</span> |
| <a name="l00147"></a>00147 <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> |
| <a name="l00148"></a>00148 |
| <a name="l00149"></a>00149 <span class="keyword">template</span> <<span class="keyword">typename</span> P> |
| <a name="l00150"></a>00150 <span class="keyword">inline</span> P& memunit_advanced_ref(P* p, std::ptrdiff_t diff) { |
| <a name="l00151"></a>00151 <span class="keywordflow">return</span> *memunit_advanced(p,diff); |
| <a name="l00152"></a>00152 } |
| <a name="l00153"></a>00153 |
| <a name="l00154"></a>00154 } } <span class="comment">// namespace boost::gil</span> |
| <a name="l00155"></a>00155 |
| <a name="l00156"></a>00156 <span class="preprocessor">#endif</span> |
| </pre></div></div> |
| <hr size="1"><address style="text-align: right;"><small>Generated on Sat May 2 13:50:14 2009 for Generic Image Library by |
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