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41<h1>planar_pixel_iterator.hpp</h1><a href="g_i_l_0247.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
42<a name="l00002"></a>00002 <span class="comment"> Copyright 2005-2007 Adobe Systems Incorporated</span>
43<a name="l00003"></a>00003 <span class="comment"> </span>
44<a name="l00004"></a>00004 <span class="comment"> Use, modification and distribution are subject to the Boost Software License,</span>
45<a name="l00005"></a>00005 <span class="comment"> Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at</span>
46<a name="l00006"></a>00006 <span class="comment"> http://www.boost.org/LICENSE_1_0.txt).</span>
47<a name="l00007"></a>00007 <span class="comment"></span>
48<a name="l00008"></a>00008 <span class="comment"> See http://opensource.adobe.com/gil for most recent version including documentation.</span>
49<a name="l00009"></a>00009 <span class="comment">*/</span>
50<a name="l00010"></a>00010
51<a name="l00011"></a>00011 <span class="comment">/*************************************************************************************************/</span>
52<a name="l00012"></a>00012
53<a name="l00013"></a>00013 <span class="preprocessor">#ifndef GIL_PLANAR_PTR_H</span>
54<a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#define GIL_PLANAR_PTR_H</span>
55<a name="l00015"></a>00015 <span class="preprocessor"></span>
56<a name="l00024"></a>00024
57<a name="l00025"></a>00025 <span class="preprocessor">#include &lt;cassert&gt;</span>
58<a name="l00026"></a>00026 <span class="preprocessor">#include &lt;iterator&gt;</span>
59<a name="l00027"></a>00027 <span class="preprocessor">#include &lt;boost/iterator/iterator_facade.hpp&gt;</span>
60<a name="l00028"></a>00028 <span class="preprocessor">#include "<a class="code" href="g_i_l_0094.html" title="GIL configuration file.">gil_config.hpp</a>"</span>
61<a name="l00029"></a>00029 <span class="preprocessor">#include "<a class="code" href="pixel_8hpp.html" title="pixel class and related utilities">pixel.hpp</a>"</span>
62<a name="l00030"></a>00030 <span class="preprocessor">#include "<a class="code" href="g_i_l_0260.html" title="pixel step iterator">step_iterator.hpp</a>"</span>
63<a name="l00031"></a>00031
64<a name="l00032"></a>00032 <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {
65<a name="l00033"></a>00033
66<a name="l00034"></a>00034 <span class="comment">//forward declaration (as this file is included in planar_pixel_reference.hpp)</span>
67<a name="l00035"></a>00035 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> ChannelReference, <span class="keyword">typename</span> ColorSpace&gt;
68<a name="l00036"></a>00036 <span class="keyword">struct </span>planar_pixel_reference;
69<a name="l00037"></a>00037
70<a name="l00042"></a>00042
71<a name="l00046"></a>00046
72<a name="l00054"></a>00054 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> ChannelPtr, <span class="keyword">typename</span> ColorSpace&gt;
73<a name="l00055"></a><a class="code" href="g_i_l_0609.html">00055</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0609.html" title="An iterator over planar pixels. Models HomogeneousColorBaseConcept, PixelIteratorConcept...">planar_pixel_iterator</a> : <span class="keyword">public</span> iterator_facade&lt;planar_pixel_iterator&lt;ChannelPtr,ColorSpace&gt;,
74<a name="l00056"></a>00056 pixel&lt;typename std::iterator_traits&lt;ChannelPtr&gt;::value_type,layout&lt;ColorSpace&gt; &gt;,
75<a name="l00057"></a>00057 random_access_traversal_tag,
76<a name="l00058"></a>00058 const planar_pixel_reference&lt;typename std::iterator_traits&lt;ChannelPtr&gt;::reference,ColorSpace&gt; &gt;,
77<a name="l00059"></a>00059 <span class="keyword">public</span> detail::homogeneous_color_base&lt;ChannelPtr,layout&lt;ColorSpace&gt;,mpl::size&lt;ColorSpace&gt;::value &gt; {
78<a name="l00060"></a>00060 <span class="keyword">private</span>:
79<a name="l00061"></a>00061 <span class="keyword">typedef</span> iterator_facade&lt;planar_pixel_iterator&lt;ChannelPtr,ColorSpace&gt;,
80<a name="l00062"></a>00062 <a class="code" href="g_i_l_0599.html" title="Represents a pixel value (a container of channels). Models: HomogeneousColorBaseValueConcept...">pixel&lt;typename std::iterator_traits&lt;ChannelPtr&gt;::value_type</a>,<a class="code" href="g_i_l_0567.html" title="Represents a color space and ordering of channels in memory.">layout&lt;ColorSpace&gt;</a> &gt;,
81<a name="l00063"></a>00063 random_access_traversal_tag,
82<a name="l00064"></a>00064 <span class="keyword">const</span> <a class="code" href="g_i_l_0611.html" title="A reference proxy to a planar pixel. Models: HomogeneousColorBaseConcept, HomogeneousPixelConcept...">planar_pixel_reference&lt;typename std::iterator_traits&lt;ChannelPtr&gt;::reference</a>,ColorSpace&gt; &gt; parent_t;
83<a name="l00065"></a>00065 <span class="keyword">typedef</span> detail::homogeneous_color_base&lt;ChannelPtr,layout&lt;ColorSpace&gt;,mpl::size&lt;ColorSpace&gt;::value&gt; color_base_parent_t;
84<a name="l00066"></a>00066 <span class="keyword">typedef</span> <span class="keyword">typename</span> std::iterator_traits&lt;ChannelPtr&gt;::value_type channel_t;
85<a name="l00067"></a>00067 <span class="keyword">public</span>:
86<a name="l00068"></a>00068 <span class="keyword">typedef</span> <span class="keyword">typename</span> parent_t::value_type value_type;
87<a name="l00069"></a>00069 <span class="keyword">typedef</span> <span class="keyword">typename</span> parent_t::reference reference;
88<a name="l00070"></a>00070 <span class="keyword">typedef</span> <span class="keyword">typename</span> parent_t::difference_type difference_type;
89<a name="l00071"></a>00071
90<a name="l00072"></a>00072 <a class="code" href="g_i_l_0609.html" title="An iterator over planar pixels. Models HomogeneousColorBaseConcept, PixelIteratorConcept...">planar_pixel_iterator</a>() : color_base_parent_t(0) {}
91<a name="l00073"></a>00073 <a class="code" href="g_i_l_0609.html" title="An iterator over planar pixels. Models HomogeneousColorBaseConcept, PixelIteratorConcept...">planar_pixel_iterator</a>(<span class="keywordtype">bool</span>) {} <span class="comment">// constructor that does not fill with zero (for performance)</span>
92<a name="l00074"></a>00074
93<a name="l00075"></a>00075 <a class="code" href="g_i_l_0609.html" title="An iterator over planar pixels. Models HomogeneousColorBaseConcept, PixelIteratorConcept...">planar_pixel_iterator</a>(<span class="keyword">const</span> ChannelPtr&amp; v0, <span class="keyword">const</span> ChannelPtr&amp; v1) : color_base_parent_t(v0,v1) {}
94<a name="l00076"></a>00076 <a class="code" href="g_i_l_0609.html" title="An iterator over planar pixels. Models HomogeneousColorBaseConcept, PixelIteratorConcept...">planar_pixel_iterator</a>(<span class="keyword">const</span> ChannelPtr&amp; v0, <span class="keyword">const</span> ChannelPtr&amp; v1, <span class="keyword">const</span> ChannelPtr&amp; v2) : color_base_parent_t(v0,v1,v2) {}
95<a name="l00077"></a>00077 <a class="code" href="g_i_l_0609.html" title="An iterator over planar pixels. Models HomogeneousColorBaseConcept, PixelIteratorConcept...">planar_pixel_iterator</a>(<span class="keyword">const</span> ChannelPtr&amp; v0, <span class="keyword">const</span> ChannelPtr&amp; v1, <span class="keyword">const</span> ChannelPtr&amp; v2, <span class="keyword">const</span> ChannelPtr&amp; v3) : color_base_parent_t(v0,v1,v2,v3) {}
96<a name="l00078"></a>00078 <a class="code" href="g_i_l_0609.html" title="An iterator over planar pixels. Models HomogeneousColorBaseConcept, PixelIteratorConcept...">planar_pixel_iterator</a>(<span class="keyword">const</span> ChannelPtr&amp; v0, <span class="keyword">const</span> ChannelPtr&amp; v1, <span class="keyword">const</span> ChannelPtr&amp; v2, <span class="keyword">const</span> ChannelPtr&amp; v3, <span class="keyword">const</span> ChannelPtr&amp; v4) : color_base_parent_t(v0,v1,v2,v3,v4) {}
97<a name="l00079"></a>00079
98<a name="l00080"></a>00080 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC1,<span class="keyword">typename</span> C1&gt;
99<a name="l00081"></a>00081 <a class="code" href="g_i_l_0609.html" title="An iterator over planar pixels. Models HomogeneousColorBaseConcept, PixelIteratorConcept...">planar_pixel_iterator</a>(<span class="keyword">const</span> <a class="code" href="g_i_l_0609.html" title="An iterator over planar pixels. Models HomogeneousColorBaseConcept, PixelIteratorConcept...">planar_pixel_iterator&lt;IC1,C1&gt;</a>&amp; ptr) : color_base_parent_t(ptr) {}
100<a name="l00082"></a>00082
101<a name="l00083"></a>00083
102<a name="l00087"></a>00087 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> P&gt;
103<a name="l00088"></a><a class="code" href="g_i_l_0609.html#340b95bc4afd461df05de5816763e8f8">00088</a> <a class="code" href="g_i_l_0609.html" title="An iterator over planar pixels. Models HomogeneousColorBaseConcept, PixelIteratorConcept...">planar_pixel_iterator</a>(P* pix) : color_base_parent_t(pix, true) {
104<a name="l00089"></a>00089 function_requires&lt;PixelsCompatibleConcept&lt;P,value_type&gt; &gt;();
105<a name="l00090"></a>00090 }
106<a name="l00091"></a>00091
107<a name="l00092"></a>00092 <span class="keyword">struct </span>address_of { <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt; T* operator()(T&amp; t) { <span class="keywordflow">return</span> &amp;t; } };
108<a name="l00093"></a>00093 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> P&gt;
109<a name="l00094"></a>00094 planar_pixel_iterator&amp; operator=(P* pix) {
110<a name="l00095"></a>00095 function_requires&lt;PixelsCompatibleConcept&lt;P,value_type&gt; &gt;();
111<a name="l00096"></a>00096 static_transform(*pix,*<span class="keyword">this</span>, address_of());
112<a name="l00097"></a>00097
113<a name="l00098"></a>00098 <span class="comment">// PERFORMANCE_CHECK: Compare to this:</span>
114<a name="l00099"></a>00099 <span class="comment">//this-&gt;template semantic_at_c&lt;0&gt;()=&amp;pix-&gt;template semantic_at_c&lt;0&gt;();</span>
115<a name="l00100"></a>00100 <span class="comment">//this-&gt;template semantic_at_c&lt;1&gt;()=&amp;pix-&gt;template semantic_at_c&lt;1&gt;();</span>
116<a name="l00101"></a>00101 <span class="comment">//this-&gt;template semantic_at_c&lt;2&gt;()=&amp;pix-&gt;template semantic_at_c&lt;2&gt;();</span>
117<a name="l00102"></a>00102 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
118<a name="l00103"></a>00103 }
119<a name="l00104"></a>00104
120<a name="l00107"></a><a class="code" href="g_i_l_0609.html#de1279c4ed222b6efb0867c038765ea1">00107</a> reference <a class="code" href="g_i_l_0609.html#de1279c4ed222b6efb0867c038765ea1">operator[]</a>(difference_type d)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> memunit_advanced_ref(*<span class="keyword">this</span>,d*<span class="keyword">sizeof</span>(channel_t));}
121<a name="l00108"></a>00108
122<a name="l00109"></a>00109 reference operator-&gt;()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> **<span class="keyword">this</span>; }
123<a name="l00110"></a>00110
124<a name="l00111"></a>00111 <span class="comment">// PERFORMANCE_CHECK: Remove?</span>
125<a name="l00112"></a>00112 <span class="keywordtype">bool</span> operator&lt; (<span class="keyword">const</span> planar_pixel_iterator&amp; ptr)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> at_c&lt;0&gt;(*this)&lt; at_c&lt;0&gt;(ptr); }
126<a name="l00113"></a>00113 <span class="keywordtype">bool</span> operator!=(<span class="keyword">const</span> planar_pixel_iterator&amp; ptr)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> at_c&lt;0&gt;(*this)!=at_c&lt;0&gt;(ptr); }
127<a name="l00114"></a>00114 <span class="keyword">private</span>:
128<a name="l00115"></a>00115 <span class="keyword">friend</span> <span class="keyword">class </span>boost::iterator_core_access;
129<a name="l00116"></a>00116
130<a name="l00117"></a>00117 <span class="keywordtype">void</span> increment() { static_transform(*<span class="keyword">this</span>,*<span class="keyword">this</span>,detail::inc&lt;ChannelPtr&gt;()); }
131<a name="l00118"></a>00118 <span class="keywordtype">void</span> decrement() { static_transform(*<span class="keyword">this</span>,*<span class="keyword">this</span>,detail::dec&lt;ChannelPtr&gt;()); }
132<a name="l00119"></a>00119 <span class="keywordtype">void</span> advance(ptrdiff_t d) { static_transform(*<span class="keyword">this</span>,*<span class="keyword">this</span>,std::bind2nd(detail::plus_asymmetric&lt;ChannelPtr,ptrdiff_t&gt;(),d)); }
133<a name="l00120"></a>00120 reference dereference()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> this-&gt;<span class="keyword">template</span> deref&lt;reference&gt;(); }
134<a name="l00121"></a>00121
135<a name="l00122"></a>00122 ptrdiff_t distance_to(<span class="keyword">const</span> planar_pixel_iterator&amp; it)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> at_c&lt;0&gt;(it)-at_c&lt;0&gt;(*<span class="keyword">this</span>); }
136<a name="l00123"></a>00123 <span class="keywordtype">bool</span> <a class="code" href="g_i_l_0214.html#g4ed3cf71cb0fbf435d1389df8567a4e5" title="std::equal(I1,I1,I2) with I1 and I2 being a iterator_from_2d">equal</a>(<span class="keyword">const</span> planar_pixel_iterator&amp; it)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> at_c&lt;0&gt;(*this)==at_c&lt;0&gt;(it); }
137<a name="l00124"></a>00124 };
138<a name="l00125"></a>00125
139<a name="l00126"></a>00126 <span class="keyword">namespace </span>detail {
140<a name="l00127"></a>00127 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC&gt; <span class="keyword">struct </span>channel_iterator_is_mutable : <span class="keyword">public</span> mpl::true_ {};
141<a name="l00128"></a>00128 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt; <span class="keyword">struct </span>channel_iterator_is_mutable&lt;const T*&gt; : <span class="keyword">public</span> mpl::false_ {};
142<a name="l00129"></a>00129 }
143<a name="l00130"></a>00130
144<a name="l00131"></a>00131 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C&gt;
145<a name="l00132"></a>00132 <span class="keyword">struct </span>const_iterator_type&lt;planar_pixel_iterator&lt;IC,C&gt; &gt; {
146<a name="l00133"></a>00133 <span class="keyword">private</span>:
147<a name="l00134"></a>00134 <span class="keyword">typedef</span> <span class="keyword">typename</span> std::iterator_traits&lt;IC&gt;::value_type channel_t;
148<a name="l00135"></a>00135 <span class="keyword">public</span>:
149<a name="l00136"></a>00136 <span class="keyword">typedef</span> planar_pixel_iterator&lt;typename channel_traits&lt;channel_t&gt;::const_pointer,C&gt; type;
150<a name="l00137"></a>00137 };
151<a name="l00138"></a>00138
152<a name="l00139"></a>00139 <span class="comment">// The default implementation when the iterator is a C pointer is to use the standard constness semantics</span>
153<a name="l00140"></a>00140 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C&gt;
154<a name="l00141"></a>00141 <span class="keyword">struct </span>iterator_is_mutable&lt;planar_pixel_iterator&lt;IC,C&gt; &gt; : <span class="keyword">public</span> detail::channel_iterator_is_mutable&lt;IC&gt; {};
155<a name="l00142"></a>00142
156<a name="l00144"></a>00144 <span class="comment">// ColorBasedConcept</span>
157<a name="l00146"></a>00146 <span class="comment"></span>
158<a name="l00147"></a>00147 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C, <span class="keywordtype">int</span> K&gt;
159<a name="l00148"></a>00148 <span class="keyword">struct </span>kth_element_type&lt;planar_pixel_iterator&lt;IC,C&gt;, K&gt; {
160<a name="l00149"></a>00149 <span class="keyword">typedef</span> IC type;
161<a name="l00150"></a>00150 };
162<a name="l00151"></a>00151
163<a name="l00152"></a>00152 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C, <span class="keywordtype">int</span> K&gt;
164<a name="l00153"></a>00153 <span class="keyword">struct </span>kth_element_reference_type&lt;planar_pixel_iterator&lt;IC,C&gt;, K&gt; : <span class="keyword">public</span> add_reference&lt;IC&gt; {};
165<a name="l00154"></a>00154
166<a name="l00155"></a>00155 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C, <span class="keywordtype">int</span> K&gt;
167<a name="l00156"></a>00156 <span class="keyword">struct </span>kth_element_const_reference_type&lt;planar_pixel_iterator&lt;IC,C&gt;, K&gt; : <span class="keyword">public</span> add_reference&lt;typename add_const&lt;IC&gt;::type&gt; {};
168<a name="l00157"></a>00157
169<a name="l00159"></a>00159 <span class="comment">// HomogeneousPixelBasedConcept</span>
170<a name="l00161"></a>00161 <span class="comment"></span>
171<a name="l00162"></a>00162 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C&gt;
172<a name="l00163"></a>00163 <span class="keyword">struct </span>color_space_type&lt;planar_pixel_iterator&lt;IC,C&gt; &gt; {
173<a name="l00164"></a>00164 <span class="keyword">typedef</span> C type;
174<a name="l00165"></a>00165 };
175<a name="l00166"></a>00166
176<a name="l00167"></a>00167 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C&gt;
177<a name="l00168"></a>00168 <span class="keyword">struct </span>channel_mapping_type&lt;planar_pixel_iterator&lt;IC,C&gt; &gt; : <span class="keyword">public</span> channel_mapping_type&lt;typename planar_pixel_iterator&lt;IC,C&gt;::value_type&gt; {};
178<a name="l00169"></a>00169
179<a name="l00170"></a>00170 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C&gt;
180<a name="l00171"></a>00171 <span class="keyword">struct </span>is_planar&lt;planar_pixel_iterator&lt;IC,C&gt; &gt; : <span class="keyword">public</span> mpl::true_ {};
181<a name="l00172"></a>00172
182<a name="l00173"></a>00173 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C&gt;
183<a name="l00174"></a>00174 <span class="keyword">struct </span>channel_type&lt;planar_pixel_iterator&lt;IC,C&gt; &gt; {
184<a name="l00175"></a>00175 <span class="keyword">typedef</span> <span class="keyword">typename</span> std::iterator_traits&lt;IC&gt;::value_type type;
185<a name="l00176"></a>00176 };
186<a name="l00177"></a>00177
187<a name="l00179"></a>00179 <span class="comment">// MemoryBasedIteratorConcept</span>
188<a name="l00181"></a>00181 <span class="comment"></span>
189<a name="l00182"></a>00182 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C&gt;
190<a name="l00183"></a>00183 <span class="keyword">inline</span> std::ptrdiff_t memunit_step(<span class="keyword">const</span> planar_pixel_iterator&lt;IC,C&gt;&amp;) { <span class="keywordflow">return</span> <span class="keyword">sizeof</span>(<span class="keyword">typename</span> std::iterator_traits&lt;IC&gt;::value_type); }
191<a name="l00184"></a>00184
192<a name="l00185"></a>00185 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C&gt;
193<a name="l00186"></a>00186 <span class="keyword">inline</span> std::ptrdiff_t memunit_distance(<span class="keyword">const</span> planar_pixel_iterator&lt;IC,C&gt;&amp; p1, <span class="keyword">const</span> planar_pixel_iterator&lt;IC,C&gt;&amp; p2) {
194<a name="l00187"></a>00187 <span class="keywordflow">return</span> memunit_distance(at_c&lt;0&gt;(p1),at_c&lt;0&gt;(p2));
195<a name="l00188"></a>00188 }
196<a name="l00189"></a>00189
197<a name="l00190"></a>00190 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC&gt;
198<a name="l00191"></a>00191 <span class="keyword">struct </span>memunit_advance_fn {
199<a name="l00192"></a>00192 memunit_advance_fn(std::ptrdiff_t diff) : _diff(diff) {}
200<a name="l00193"></a>00193 IC operator()(<span class="keyword">const</span> IC&amp; p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> memunit_advanced(p,_diff); }
201<a name="l00194"></a>00194
202<a name="l00195"></a>00195 std::ptrdiff_t _diff;
203<a name="l00196"></a>00196 };
204<a name="l00197"></a>00197
205<a name="l00198"></a>00198 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C&gt;
206<a name="l00199"></a>00199 <span class="keyword">inline</span> <span class="keywordtype">void</span> memunit_advance(planar_pixel_iterator&lt;IC,C&gt;&amp; p, std::ptrdiff_t diff) {
207<a name="l00200"></a>00200 static_transform(p, p, memunit_advance_fn&lt;IC&gt;(diff));
208<a name="l00201"></a>00201 }
209<a name="l00202"></a>00202
210<a name="l00203"></a>00203 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C&gt;
211<a name="l00204"></a>00204 <span class="keyword">inline</span> planar_pixel_iterator&lt;IC,C&gt; memunit_advanced(<span class="keyword">const</span> planar_pixel_iterator&lt;IC,C&gt;&amp; p, std::ptrdiff_t diff) {
212<a name="l00205"></a>00205 planar_pixel_iterator&lt;IC,C&gt; ret=p;
213<a name="l00206"></a>00206 memunit_advance(ret, diff);
214<a name="l00207"></a>00207 <span class="keywordflow">return</span> ret;
215<a name="l00208"></a>00208 }
216<a name="l00209"></a>00209
217<a name="l00210"></a>00210 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> ChannelPtr, <span class="keyword">typename</span> ColorSpace&gt;
218<a name="l00211"></a>00211 <span class="keyword">inline</span> planar_pixel_reference&lt;typename std::iterator_traits&lt;ChannelPtr&gt;::reference,ColorSpace&gt;
219<a name="l00212"></a>00212 memunit_advanced_ref(<span class="keyword">const</span> planar_pixel_iterator&lt;ChannelPtr,ColorSpace&gt;&amp; ptr, std::ptrdiff_t diff) {
220<a name="l00213"></a>00213 <span class="keywordflow">return</span> planar_pixel_reference&lt;typename std::iterator_traits&lt;ChannelPtr&gt;::reference,ColorSpace&gt;(ptr, diff);
221<a name="l00214"></a>00214 }
222<a name="l00215"></a>00215
223<a name="l00217"></a>00217 <span class="comment">// HasDynamicXStepTypeConcept</span>
224<a name="l00219"></a>00219 <span class="comment"></span>
225<a name="l00220"></a>00220 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> IC, <span class="keyword">typename</span> C&gt;
226<a name="l00221"></a>00221 <span class="keyword">struct </span>dynamic_x_step_type&lt;planar_pixel_iterator&lt;IC,C&gt; &gt; {
227<a name="l00222"></a>00222 <span class="keyword">typedef</span> memory_based_step_iterator&lt;planar_pixel_iterator&lt;IC,C&gt; &gt; type;
228<a name="l00223"></a>00223 };
229<a name="l00224"></a>00224
230<a name="l00225"></a>00225 } } <span class="comment">// namespace boost::gil</span>
231<a name="l00226"></a>00226
232<a name="l00227"></a>00227 <span class="preprocessor">#endif</span>
233</pre></div></div>
234<hr size="1"><address style="text-align: right;"><small>Generated on Sat May 2 13:50:14 2009 for Generic Image Library by&nbsp;
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236<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.6 </small></address>
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