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2
3 Distributed under the Boost Software License, Version 1.0.
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22 <TITLE>Generic Image Library: image_view_factory.hpp Source File</TITLE>
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41<h1>image_view_factory.hpp</h1><a href="g_i_l_0227.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_IMAGE_VIEW_FACTORY_HPP</span>
54<a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#define GIL_IMAGE_VIEW_FACTORY_HPP</span>
55<a name="l00015"></a>00015 <span class="preprocessor"></span>
56<a name="l00025"></a>00025
57<a name="l00027"></a>00027 <span class="preprocessor">#include &lt;cassert&gt;</span>
58<a name="l00028"></a>00028 <span class="preprocessor">#include &lt;cstddef&gt;</span>
59<a name="l00029"></a>00029 <span class="preprocessor">#include "<a class="code" href="g_i_l_0094.html" title="GIL configuration file.">gil_config.hpp</a>"</span>
60<a name="l00030"></a>00030 <span class="preprocessor">#include "<a class="code" href="g_i_l_0238.html" title="metafunctions that construct types or return type properties">metafunctions.hpp</a>"</span>
61<a name="l00031"></a>00031 <span class="preprocessor">#include "<a class="code" href="gray_8hpp.html" title="Support for grayscale color space and variants.">gray.hpp</a>"</span>
62<a name="l00032"></a>00032 <span class="preprocessor">#include "<a class="code" href="g_i_l_0071.html" title="GIL default color space conversions.">color_convert.hpp</a>"</span>
63<a name="l00033"></a>00033
64<a name="l00037"></a>00037
65<a name="l00041"></a>00041
66<a name="l00042"></a>00042 <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {
67<a name="l00043"></a>00043 <span class="keyword">struct </span>default_color_converter;
68<a name="l00044"></a>00044
69<a name="l00045"></a>00045 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt; <span class="keyword">struct </span>dynamic_x_step_type;
70<a name="l00046"></a>00046 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt; <span class="keyword">struct </span>dynamic_y_step_type;
71<a name="l00047"></a>00047 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt; <span class="keyword">struct </span>transposed_type;
72<a name="l00048"></a>00048
73<a name="l00051"></a>00051 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
74<a name="l00052"></a><a class="code" href="g_i_l_0532.html">00052</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0532.html" title="Returns the type of a view that has a dynamic step along both X and Y.">dynamic_xy_step_type</a> : <span class="keyword">public</span> dynamic_y_step_type&lt;typename dynamic_x_step_type&lt;View&gt;::type&gt; {};
75<a name="l00053"></a>00053
76<a name="l00056"></a>00056 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
77<a name="l00057"></a><a class="code" href="g_i_l_0531.html">00057</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0531.html" title="Returns the type of a transposed view that has a dynamic step along both X and Y...">dynamic_xy_step_transposed_type</a> : <span class="keyword">public</span> <a class="code" href="g_i_l_0532.html" title="Returns the type of a view that has a dynamic step along both X and Y.">dynamic_xy_step_type</a>&lt;typename transposed_type&lt;View&gt;::type&gt; {};
78<a name="l00058"></a>00058
79<a name="l00059"></a>00059
80<a name="l00062"></a>00062 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator&gt;
81<a name="l00063"></a>00063 <span class="keyword">typename</span> <a class="code" href="g_i_l_0627.html" title="Given a pixel iterator defining access to pixels along a row, returns the types of...">type_from_x_iterator&lt;Iterator&gt;::view_t</a>
82<a name="l00064"></a><a class="code" href="g_i_l_0140.html#g258d615c33c66b17c85b018297164df1">00064</a> <a class="code" href="g_i_l_0140.html#g558c29855a5b73404d4d21f22832a624" title="Constructing image views from raw interleaved pixel data.">interleaved_view</a>(std::size_t width, std::size_t height,
83<a name="l00065"></a>00065 Iterator pixels, std::ptrdiff_t rowsize_in_bytes) {
84<a name="l00066"></a>00066 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="g_i_l_0627.html" title="Given a pixel iterator defining access to pixels along a row, returns the types of...">type_from_x_iterator&lt;Iterator&gt;::view_t</a> RView;
85<a name="l00067"></a>00067 <span class="keywordflow">return</span> RView(width, height, <span class="keyword">typename</span> RView::locator(pixels, rowsize_in_bytes));
86<a name="l00068"></a>00068 }
87<a name="l00069"></a>00069
88<a name="l00072"></a>00072 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> Iterator&gt;
89<a name="l00073"></a>00073 <span class="keyword">typename</span> type_from_x_iterator&lt;Iterator&gt;::view_t
90<a name="l00074"></a><a class="code" href="g_i_l_0140.html#g558c29855a5b73404d4d21f22832a624">00074</a> <a class="code" href="g_i_l_0140.html#g558c29855a5b73404d4d21f22832a624" title="Constructing image views from raw interleaved pixel data.">interleaved_view</a>(<a class="code" href="g_i_l_0060.html" title="2D point both axes of which have the same dimension typeModels: Point2DConcept">point2&lt;std::size_t&gt;</a> dim,
91<a name="l00075"></a>00075 Iterator pixels, std::ptrdiff_t rowsize_in_bytes) {
92<a name="l00076"></a>00076 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="g_i_l_0627.html" title="Given a pixel iterator defining access to pixels along a row, returns the types of...">type_from_x_iterator&lt;Iterator&gt;::view_t</a> RView;
93<a name="l00077"></a>00077 <span class="keywordflow">return</span> RView(dim, <span class="keyword">typename</span> RView::locator(pixels, rowsize_in_bytes));
94<a name="l00078"></a>00078 }
95<a name="l00079"></a>00079
96<a name="l00081"></a>00081 <span class="comment">// interleaved_view_get_raw_data, planar_view_get_raw_data - return pointers to the raw data (the channels) of a basic homogeneous view.</span>
97<a name="l00083"></a>00083 <span class="comment"></span>
98<a name="l00084"></a>00084 <span class="keyword">namespace </span>detail {
99<a name="l00085"></a>00085 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View, <span class="keywordtype">bool</span> IsMutable&gt; <span class="keyword">struct </span>channel_pointer_type_impl;
100<a name="l00086"></a>00086
101<a name="l00087"></a>00087 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt; <span class="keyword">struct </span>channel_pointer_type_impl&lt;View, true&gt; {
102<a name="l00088"></a>00088 <span class="keyword">typedef</span> <span class="keyword">typename</span> channel_type&lt;View&gt;::type* type;
103<a name="l00089"></a>00089 };
104<a name="l00090"></a>00090 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt; <span class="keyword">struct </span>channel_pointer_type_impl&lt;View, false&gt; {
105<a name="l00091"></a>00091 <span class="keyword">typedef</span> <span class="keyword">const</span> <span class="keyword">typename</span> channel_type&lt;View&gt;::type* type;
106<a name="l00092"></a>00092 };
107<a name="l00093"></a>00093
108<a name="l00094"></a>00094 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt; <span class="keyword">struct </span>channel_pointer_type
109<a name="l00095"></a>00095 : <span class="keyword">public</span> channel_pointer_type_impl&lt;View, view_is_mutable&lt;View&gt;::value&gt; {};
110<a name="l00096"></a>00096 } <span class="comment">// namespace detail</span>
111<a name="l00097"></a>00097
112<a name="l00100"></a>00100 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> HomogeneousView&gt;
113<a name="l00101"></a><a class="code" href="g_i_l_0140.html#g01d2b0e1eb77cd5cafb18f4140278918">00101</a> <span class="keyword">typename</span> detail::channel_pointer_type&lt;HomogeneousView&gt;::type <a class="code" href="g_i_l_0140.html#g01d2b0e1eb77cd5cafb18f4140278918" title="Returns C pointer to the the channels of an interleaved homogeneous view.">interleaved_view_get_raw_data</a>(<span class="keyword">const</span> HomogeneousView&amp; <a class="code" href="g_i_l_0135.html#g55e45a15dddfc0d870c2f7fb9739cb2e" title="Returns the non-constant-pixel view of any image. The returned view is any view.">view</a>) {
114<a name="l00102"></a>00102 BOOST_STATIC_ASSERT((!is_planar&lt;HomogeneousView&gt;::value &amp;&amp; <a class="code" href="g_i_l_0628.html" title="Basic views must be over basic locators.">view_is_basic&lt;HomogeneousView&gt;::value</a>));
115<a name="l00103"></a>00103 BOOST_STATIC_ASSERT((boost::is_pointer&lt;typename HomogeneousView::x_iterator&gt;::value));
116<a name="l00104"></a>00104
117<a name="l00105"></a>00105 <span class="keywordflow">return</span> &amp;at_c&lt;0&gt;(<a class="code" href="g_i_l_0135.html#g55e45a15dddfc0d870c2f7fb9739cb2e" title="Returns the non-constant-pixel view of any image. The returned view is any view.">view</a>(0,0));
118<a name="l00106"></a>00106 }
119<a name="l00107"></a>00107
120<a name="l00110"></a>00110 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> HomogeneousView&gt;
121<a name="l00111"></a><a class="code" href="g_i_l_0140.html#ga696176662e719ef5637c2ed4d9a2035">00111</a> <span class="keyword">typename</span> detail::channel_pointer_type&lt;HomogeneousView&gt;::type <a class="code" href="g_i_l_0140.html#ga696176662e719ef5637c2ed4d9a2035" title="Returns C pointer to the the channels of a given color plane of a planar homogeneous...">planar_view_get_raw_data</a>(<span class="keyword">const</span> HomogeneousView&amp; <a class="code" href="g_i_l_0135.html#g55e45a15dddfc0d870c2f7fb9739cb2e" title="Returns the non-constant-pixel view of any image. The returned view is any view.">view</a>, <span class="keywordtype">int</span> plane_index) {
122<a name="l00112"></a>00112 BOOST_STATIC_ASSERT((is_planar&lt;HomogeneousView&gt;::value &amp;&amp; <a class="code" href="g_i_l_0628.html" title="Basic views must be over basic locators.">view_is_basic&lt;HomogeneousView&gt;::value</a>));
123<a name="l00113"></a>00113 <span class="keywordflow">return</span> dynamic_at_c(view.row_begin(0),plane_index);
124<a name="l00114"></a>00114 }
125<a name="l00115"></a>00115
126<a name="l00116"></a>00116
127<a name="l00120"></a>00120
128<a name="l00125"></a>00125 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcConstRefP, <span class="keyword">typename</span> DstP, <span class="keyword">typename</span> CC=default_color_converter &gt; <span class="comment">// const_reference to the source pixel and destination pixel value</span>
129<a name="l00126"></a><a class="code" href="g_i_l_0022.html">00126</a> <span class="keyword">class </span><a class="code" href="g_i_l_0022.html" title="Function object that given a source pixel, returns it converted to a given color...">color_convert_deref_fn</a> : <span class="keyword">public</span> <a class="code" href="g_i_l_0475.html" title="Helper base class for pixel dereference adaptors.">deref_base</a>&lt;color_convert_deref_fn&lt;SrcConstRefP,DstP,CC&gt;, DstP, DstP, const DstP&amp;, SrcConstRefP, DstP, false&gt; {
130<a name="l00127"></a>00127 <span class="keyword">private</span>:
131<a name="l00128"></a>00128 CC _cc; <span class="comment">// color-converter</span>
132<a name="l00129"></a>00129 <span class="keyword">public</span>:
133<a name="l00130"></a>00130 <a class="code" href="g_i_l_0022.html" title="Function object that given a source pixel, returns it converted to a given color...">color_convert_deref_fn</a>() {}
134<a name="l00131"></a>00131 <a class="code" href="g_i_l_0022.html" title="Function object that given a source pixel, returns it converted to a given color...">color_convert_deref_fn</a>(CC cc_in) : _cc(cc_in) {}
135<a name="l00132"></a>00132
136<a name="l00133"></a>00133 DstP operator()(SrcConstRefP srcP)<span class="keyword"> const </span>{
137<a name="l00134"></a>00134 DstP dstP;
138<a name="l00135"></a>00135 _cc(srcP,dstP);
139<a name="l00136"></a>00136 <span class="keywordflow">return</span> dstP;
140<a name="l00137"></a>00137 }
141<a name="l00138"></a>00138 };
142<a name="l00139"></a>00139
143<a name="l00140"></a>00140 <span class="keyword">namespace </span>detail {
144<a name="l00141"></a>00141 <span class="comment">// Add color converter upon dereferencing</span>
145<a name="l00142"></a>00142 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> CC, <span class="keyword">typename</span> DstP, <span class="keyword">typename</span> SrcP&gt;
146<a name="l00143"></a>00143 <span class="keyword">struct </span>_color_converted_view_type {
147<a name="l00144"></a>00144 <span class="keyword">private</span>:
148<a name="l00145"></a>00145 <span class="keyword">typedef</span> <a class="code" href="g_i_l_0022.html" title="Function object that given a source pixel, returns it converted to a given color...">color_convert_deref_fn&lt;typename SrcView::const_t::reference,DstP,CC&gt;</a> deref_t;
149<a name="l00146"></a>00146 <span class="keyword">typedef</span> <span class="keyword">typename</span> SrcView::template add_deref&lt;deref_t&gt; add_ref_t;
150<a name="l00147"></a>00147 <span class="keyword">public</span>:
151<a name="l00148"></a>00148 <span class="keyword">typedef</span> <span class="keyword">typename</span> add_ref_t::type type;
152<a name="l00149"></a>00149 <span class="keyword">static</span> type make(<span class="keyword">const</span> SrcView&amp; sv,CC cc) {<span class="keywordflow">return</span> add_ref_t::make(sv,deref_t(cc));}
153<a name="l00150"></a>00150 };
154<a name="l00151"></a>00151
155<a name="l00152"></a>00152 <span class="comment">// If the Src view has the same pixel type as the target, there is no need for color conversion</span>
156<a name="l00153"></a>00153 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> CC, <span class="keyword">typename</span> DstP&gt;
157<a name="l00154"></a>00154 <span class="keyword">struct </span>_color_converted_view_type&lt;SrcView,CC,DstP,DstP&gt; {
158<a name="l00155"></a>00155 <span class="keyword">typedef</span> SrcView type;
159<a name="l00156"></a>00156 <span class="keyword">static</span> type make(<span class="keyword">const</span> SrcView&amp; sv,CC) {<span class="keywordflow">return</span> sv;}
160<a name="l00157"></a>00157 };
161<a name="l00158"></a>00158 } <span class="comment">// namespace detail</span>
162<a name="l00159"></a>00159
163<a name="l00160"></a>00160
164<a name="l00163"></a>00163 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DstP, <span class="keyword">typename</span> CC=default_color_converter&gt;
165<a name="l00164"></a><a class="code" href="g_i_l_0434.html">00164</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0434.html" title="Returns the type of a view that does color conversion upon dereferencing its pixels...">color_converted_view_type</a> : <span class="keyword">public</span> detail::_color_converted_view_type&lt;SrcView,
166<a name="l00165"></a>00165 CC,
167<a name="l00166"></a>00166 DstP,
168<a name="l00167"></a>00167 typename SrcView::value_type&gt; {
169<a name="l00168"></a>00168 GIL_CLASS_REQUIRE(DstP, boost::gil, <a class="code" href="g_i_l_0328.html" title="Pixel concept that allows for changing its channels.">MutablePixelConcept</a>)<span class="comment">//why does it have to be mutable???</span>
170<a name="l00169"></a>00169 };
171<a name="l00170"></a>00170
172<a name="l00171"></a>00171
173<a name="l00174"></a>00174 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> DstP, <span class="keyword">typename</span> View, <span class="keyword">typename</span> CC&gt;
174<a name="l00175"></a><a class="code" href="g_i_l_0161.html#gb5114cdb6c2a34f6706952f80baf2dfa">00175</a> <span class="keyword">inline</span> <span class="keyword">typename</span> <a class="code" href="g_i_l_0434.html" title="Returns the type of a view that does color conversion upon dereferencing its pixels...">color_converted_view_type&lt;View,DstP,CC&gt;::type</a> <a class="code" href="g_i_l_0161.html#g4e84970128101b572125f025dc81f8e0" title="overload of generic color_converted_view with the default color-converter">color_converted_view</a>(<span class="keyword">const</span> View&amp; src,CC cc) {
175<a name="l00176"></a>00176 <span class="keywordflow">return</span> <a class="code" href="g_i_l_0434.html" title="Returns the type of a view that does color conversion upon dereferencing its pixels...">color_converted_view_type&lt;View,DstP,CC&gt;::make</a>(src,cc);
176<a name="l00177"></a>00177 }
177<a name="l00178"></a>00178
178<a name="l00181"></a>00181 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> DstP, <span class="keyword">typename</span> View&gt;
179<a name="l00182"></a>00182 <span class="keyword">inline</span> <span class="keyword">typename</span> color_converted_view_type&lt;View,DstP&gt;::type
180<a name="l00183"></a><a class="code" href="g_i_l_0161.html#gf2cd4971200b4e54dd2fda3cb9e24d0f">00183</a> <a class="code" href="g_i_l_0161.html#g4e84970128101b572125f025dc81f8e0" title="overload of generic color_converted_view with the default color-converter">color_converted_view</a>(<span class="keyword">const</span> View&amp; src) {
181<a name="l00184"></a>00184 <span class="keywordflow">return</span> color_converted_view&lt;DstP&gt;(src,<a class="code" href="g_i_l_0452.html" title="class for color-converting one pixel to another">default_color_converter</a>());
182<a name="l00185"></a>00185 }
183<a name="l00186"></a>00186
184<a name="l00190"></a>00190
185<a name="l00192"></a>00192 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
186<a name="l00193"></a>00193 <span class="keyword">inline</span> <span class="keyword">typename</span> dynamic_y_step_type&lt;View&gt;::type flipped_up_down_view(<span class="keyword">const</span> View&amp; src) {
187<a name="l00194"></a>00194 <span class="keyword">typedef</span> <span class="keyword">typename</span> dynamic_y_step_type&lt;View&gt;::type RView;
188<a name="l00195"></a>00195 <span class="keywordflow">return</span> RView(src.dimensions(),<span class="keyword">typename</span> RView::xy_locator(src.xy_at(0,src.height()-1),-1));
189<a name="l00196"></a>00196 }
190<a name="l00197"></a>00197
191<a name="l00201"></a>00201
192<a name="l00203"></a>00203 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
193<a name="l00204"></a>00204 <span class="keyword">inline</span> <span class="keyword">typename</span> dynamic_x_step_type&lt;View&gt;::type flipped_left_right_view(<span class="keyword">const</span> View&amp; src) {
194<a name="l00205"></a>00205 <span class="keyword">typedef</span> <span class="keyword">typename</span> dynamic_x_step_type&lt;View&gt;::type RView;
195<a name="l00206"></a>00206 <span class="keywordflow">return</span> RView(src.dimensions(),<span class="keyword">typename</span> RView::xy_locator(src.xy_at(src.width()-1,0),-1,1));
196<a name="l00207"></a>00207 }
197<a name="l00208"></a>00208
198<a name="l00212"></a>00212
199<a name="l00214"></a>00214 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
200<a name="l00215"></a>00215 <span class="keyword">inline</span> <span class="keyword">typename</span> dynamic_xy_step_transposed_type&lt;View&gt;::type transposed_view(<span class="keyword">const</span> View&amp; src) {
201<a name="l00216"></a>00216 <span class="keyword">typedef</span> <span class="keyword">typename</span> dynamic_xy_step_transposed_type&lt;View&gt;::type RView;
202<a name="l00217"></a>00217 <span class="keywordflow">return</span> RView(src.height(),src.width(),<span class="keyword">typename</span> RView::xy_locator(src.xy_at(0,0),1,1,<span class="keyword">true</span>));
203<a name="l00218"></a>00218 }
204<a name="l00219"></a>00219
205<a name="l00223"></a>00223
206<a name="l00225"></a>00225 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
207<a name="l00226"></a>00226 <span class="keyword">inline</span> <span class="keyword">typename</span> dynamic_xy_step_transposed_type&lt;View&gt;::type rotated90cw_view(<span class="keyword">const</span> View&amp; src) {
208<a name="l00227"></a>00227 <span class="keyword">typedef</span> <span class="keyword">typename</span> dynamic_xy_step_transposed_type&lt;View&gt;::type RView;
209<a name="l00228"></a>00228 <span class="keywordflow">return</span> RView(src.height(),src.width(),<span class="keyword">typename</span> RView::xy_locator(src.xy_at(0,src.height()-1),-1,1,<span class="keyword">true</span>));
210<a name="l00229"></a>00229 }
211<a name="l00230"></a>00230
212<a name="l00234"></a>00234
213<a name="l00236"></a>00236 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
214<a name="l00237"></a>00237 <span class="keyword">inline</span> <span class="keyword">typename</span> dynamic_xy_step_transposed_type&lt;View&gt;::type rotated90ccw_view(<span class="keyword">const</span> View&amp; src) {
215<a name="l00238"></a>00238 <span class="keyword">typedef</span> <span class="keyword">typename</span> dynamic_xy_step_transposed_type&lt;View&gt;::type RView;
216<a name="l00239"></a>00239 <span class="keywordflow">return</span> RView(src.height(),src.width(),<span class="keyword">typename</span> RView::xy_locator(src.xy_at(src.width()-1,0),1,-1,<span class="keyword">true</span>));
217<a name="l00240"></a>00240 }
218<a name="l00241"></a>00241
219<a name="l00245"></a>00245
220<a name="l00247"></a>00247 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
221<a name="l00248"></a>00248 <span class="keyword">inline</span> <span class="keyword">typename</span> dynamic_xy_step_type&lt;View&gt;::type rotated180_view(<span class="keyword">const</span> View&amp; src) {
222<a name="l00249"></a>00249 <span class="keyword">typedef</span> <span class="keyword">typename</span> dynamic_xy_step_type&lt;View&gt;::type RView;
223<a name="l00250"></a>00250 <span class="keywordflow">return</span> RView(src.dimensions(),<span class="keyword">typename</span> RView::xy_locator(src.xy_at(src.width()-1,src.height()-1),-1,-1));
224<a name="l00251"></a>00251 }
225<a name="l00252"></a>00252
226<a name="l00256"></a>00256
227<a name="l00258"></a>00258 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
228<a name="l00259"></a>00259 <span class="keyword">inline</span> View subimage_view(<span class="keyword">const</span> View&amp; src, <span class="keyword">const</span> <span class="keyword">typename</span> View::point_t&amp; topleft, <span class="keyword">const</span> <span class="keyword">typename</span> View::point_t&amp; dimensions) {
229<a name="l00260"></a>00260 <span class="keywordflow">return</span> View(dimensions,src.xy_at(topleft));
230<a name="l00261"></a>00261 }
231<a name="l00262"></a>00262
232<a name="l00264"></a>00264 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
233<a name="l00265"></a>00265 <span class="keyword">inline</span> View subimage_view(<span class="keyword">const</span> View&amp; src, <span class="keywordtype">int</span> xMin, <span class="keywordtype">int</span> yMin, <span class="keywordtype">int</span> width, <span class="keywordtype">int</span> height) {
234<a name="l00266"></a>00266 <span class="keywordflow">return</span> View(width,height,src.xy_at(xMin,yMin));
235<a name="l00267"></a>00267 }
236<a name="l00268"></a>00268
237<a name="l00272"></a>00272
238<a name="l00274"></a>00274 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
239<a name="l00275"></a>00275 <span class="keyword">inline</span> <span class="keyword">typename</span> dynamic_xy_step_type&lt;View&gt;::type subsampled_view(<span class="keyword">const</span> View&amp; src, <span class="keyword">typename</span> View::coord_t xStep, <span class="keyword">typename</span> View::coord_t yStep) {
240<a name="l00276"></a>00276 assert(xStep&gt;0 &amp;&amp; yStep&gt;0);
241<a name="l00277"></a>00277 <span class="keyword">typedef</span> <span class="keyword">typename</span> dynamic_xy_step_type&lt;View&gt;::type RView;
242<a name="l00278"></a>00278 <span class="keywordflow">return</span> RView((src.width()+(xStep-1))/xStep,(src.height()+(yStep-1))/yStep,
243<a name="l00279"></a>00279 <span class="keyword">typename</span> RView::xy_locator(src.xy_at(0,0),xStep,yStep));
244<a name="l00280"></a>00280 }
245<a name="l00281"></a>00281
246<a name="l00283"></a>00283 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
247<a name="l00284"></a>00284 <span class="keyword">inline</span> <span class="keyword">typename</span> dynamic_xy_step_type&lt;View&gt;::type subsampled_view(<span class="keyword">const</span> View&amp; src, <span class="keyword">const</span> <span class="keyword">typename</span> View::point_t&amp; step) {
248<a name="l00285"></a>00285 <span class="keywordflow">return</span> subsampled_view(src,step.x,step.y);
249<a name="l00286"></a>00286 }
250<a name="l00287"></a>00287
251<a name="l00291"></a>00291
252<a name="l00292"></a>00292 <span class="keyword">namespace </span>detail {
253<a name="l00293"></a>00293 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View, <span class="keywordtype">bool</span> AreChannelsTogether&gt; <span class="keyword">struct </span>__nth_channel_view_basic;
254<a name="l00294"></a>00294
255<a name="l00295"></a>00295 <span class="comment">// nth_channel_view when the channels are not adjacent in memory. This can happen for multi-channel interleaved images </span>
256<a name="l00296"></a>00296 <span class="comment">// or images with a step</span>
257<a name="l00297"></a>00297 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
258<a name="l00298"></a>00298 <span class="keyword">struct </span>__nth_channel_view_basic&lt;View,false&gt; {
259<a name="l00299"></a>00299 <span class="keyword">typedef</span> <span class="keyword">typename</span> view_type&lt;typename channel_type&lt;View&gt;::type, gray_layout_t, <span class="keyword">false</span>, <span class="keyword">true</span>, view_is_mutable&lt;View&gt;::value&gt;::type type;
260<a name="l00300"></a>00300
261<a name="l00301"></a>00301 <span class="keyword">static</span> type make(<span class="keyword">const</span> View&amp; src, <span class="keywordtype">int</span> n) {
262<a name="l00302"></a>00302 <span class="keyword">typedef</span> <span class="keyword">typename</span> type::xy_locator locator_t;
263<a name="l00303"></a>00303 <span class="keyword">typedef</span> <span class="keyword">typename</span> type::x_iterator x_iterator_t;
264<a name="l00304"></a>00304 <span class="keyword">typedef</span> <span class="keyword">typename</span> iterator_adaptor_get_base&lt;x_iterator_t&gt;::type x_iterator_base_t;
265<a name="l00305"></a>00305 x_iterator_t sit(x_iterator_base_t(&amp;(src(0,0)[n])),src.pixels().pixel_size());
266<a name="l00306"></a>00306 <span class="keywordflow">return</span> type(src.dimensions(),locator_t(sit, src.pixels().row_size()));
267<a name="l00307"></a>00307 }
268<a name="l00308"></a>00308 };
269<a name="l00309"></a>00309
270<a name="l00310"></a>00310 <span class="comment">// nth_channel_view when the channels are together in memory (true for simple grayscale or planar images)</span>
271<a name="l00311"></a>00311 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
272<a name="l00312"></a>00312 <span class="keyword">struct </span>__nth_channel_view_basic&lt;View,true&gt; {
273<a name="l00313"></a>00313 <span class="keyword">typedef</span> <span class="keyword">typename</span> view_type&lt;typename channel_type&lt;View&gt;::type, gray_layout_t, <span class="keyword">false</span>, <span class="keyword">false</span>, view_is_mutable&lt;View&gt;::value&gt;::type type;
274<a name="l00314"></a>00314 <span class="keyword">static</span> type make(<span class="keyword">const</span> View&amp; src, <span class="keywordtype">int</span> n) {
275<a name="l00315"></a>00315 <span class="keyword">typedef</span> <span class="keyword">typename</span> type::x_iterator x_iterator_t;
276<a name="l00316"></a>00316 <span class="keywordflow">return</span> <a class="code" href="g_i_l_0140.html#g558c29855a5b73404d4d21f22832a624" title="Constructing image views from raw interleaved pixel data.">interleaved_view</a>(src.width(),src.height(),(x_iterator_t)&amp;(src(0,0)[n]), src.pixels().row_size());
277<a name="l00317"></a>00317 }
278<a name="l00318"></a>00318 };
279<a name="l00319"></a>00319
280<a name="l00320"></a>00320 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View, <span class="keywordtype">bool</span> IsBasic&gt; <span class="keyword">struct </span>__nth_channel_view;
281<a name="l00321"></a>00321
282<a name="l00322"></a>00322 <span class="comment">// For basic (memory-based) views dispatch to __nth_channel_view_basic</span>
283<a name="l00323"></a>00323 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt; <span class="keyword">struct </span>__nth_channel_view&lt;View,true&gt; {
284<a name="l00324"></a>00324 <span class="keyword">private</span>:
285<a name="l00325"></a>00325 <span class="keyword">typedef</span> <span class="keyword">typename</span> View::x_iterator src_x_iterator;
286<a name="l00326"></a>00326
287<a name="l00327"></a>00327 <span class="comment">// Determines whether the channels of a given pixel iterator are adjacent in memory.</span>
288<a name="l00328"></a>00328 <span class="comment">// Planar and grayscale iterators have channels adjacent in memory, whereas multi-channel interleaved and iterators with non-fundamental step do not.</span>
289<a name="l00329"></a>00329 BOOST_STATIC_CONSTANT(<span class="keywordtype">bool</span>, adjacent=
290<a name="l00330"></a>00330 !iterator_is_step&lt;src_x_iterator&gt;::value &amp;&amp;
291<a name="l00331"></a>00331 (is_planar&lt;src_x_iterator&gt;::value ||
292<a name="l00332"></a>00332 num_channels&lt;View&gt;::value==1));
293<a name="l00333"></a>00333 <span class="keyword">public</span>:
294<a name="l00334"></a>00334 <span class="keyword">typedef</span> <span class="keyword">typename</span> __nth_channel_view_basic&lt;View,adjacent&gt;::type type;
295<a name="l00335"></a>00335
296<a name="l00336"></a>00336 <span class="keyword">static</span> type make(<span class="keyword">const</span> View&amp; src, <span class="keywordtype">int</span> n) {
297<a name="l00337"></a>00337 <span class="keywordflow">return</span> __nth_channel_view_basic&lt;View,adjacent&gt;::make(src,n);
298<a name="l00338"></a>00338 }
299<a name="l00339"></a>00339 };
300<a name="l00340"></a>00340
301<a name="l00345"></a>00345 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcP&gt; <span class="comment">// SrcP is a reference to PixelConcept (could be pixel value or const/non-const reference)</span>
302<a name="l00346"></a>00346 <span class="comment">// Examples: pixel&lt;T,L&gt;, pixel&lt;T,L&gt;&amp;, const pixel&lt;T,L&gt;&amp;, planar_pixel_reference&lt;T&amp;,L&gt;, planar_pixel_reference&lt;const T&amp;,L&gt;</span>
303<a name="l00347"></a><a class="code" href="g_i_l_0515.html">00347</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0515.html" title="Function object that returns a grayscale reference of the N-th channel of a given...">nth_channel_deref_fn</a> {
304<a name="l00348"></a>00348 BOOST_STATIC_CONSTANT(<span class="keywordtype">bool</span>, is_mutable=<a class="code" href="g_i_l_0600.html" title="Given a model of a pixel, determines whether the model represents a pixel reference...">pixel_is_reference&lt;SrcP&gt;::value</a> &amp;&amp; <a class="code" href="g_i_l_0602.html" title="Determines if the given pixel reference is mutable (i.e. its channels can be changed)...">pixel_reference_is_mutable&lt;SrcP&gt;::value</a>);
305<a name="l00349"></a>00349 <span class="keyword">private</span>:
306<a name="l00350"></a>00350 <span class="keyword">typedef</span> <span class="keyword">typename</span> remove_reference&lt;SrcP&gt;::type src_pixel_t;
307<a name="l00351"></a>00351 <span class="keyword">typedef</span> <span class="keyword">typename</span> channel_type&lt;src_pixel_t&gt;::type channel_t;
308<a name="l00352"></a>00352 <span class="keyword">typedef</span> <span class="keyword">typename</span> src_pixel_t::const_reference const_ref_t;
309<a name="l00353"></a>00353 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="g_i_l_0604.html" title="Returns the type of a homogeneous pixel reference given the channel type, layout...">pixel_reference_type&lt;channel_t,gray_layout_t,false,is_mutable&gt;::type</a> ref_t;
310<a name="l00354"></a>00354 <span class="keyword">public</span>:
311<a name="l00355"></a>00355 <span class="keyword">typedef</span> <a class="code" href="g_i_l_0515.html" title="Function object that returns a grayscale reference of the N-th channel of a given...">nth_channel_deref_fn&lt;const_ref_t&gt;</a> <a class="code" href="g_i_l_0515.html" title="Function object that returns a grayscale reference of the N-th channel of a given...">const_t</a>;
312<a name="l00356"></a>00356 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="g_i_l_0606.html" title="Returns the type of a homogeneous pixel given the channel type and layout.">pixel_value_type&lt;channel_t,gray_layout_t&gt;::type</a> <a class="code" href="g_i_l_0599.html" title="Represents a pixel value (a container of channels). Models: HomogeneousColorBaseValueConcept...">value_type</a>;
313<a name="l00357"></a>00357 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="g_i_l_0604.html" title="Returns the type of a homogeneous pixel reference given the channel type, layout...">pixel_reference_type&lt;channel_t,gray_layout_t,false,false&gt;::type</a> const_reference;
314<a name="l00358"></a>00358 <span class="keyword">typedef</span> SrcP argument_type;
315<a name="l00359"></a>00359 <span class="keyword">typedef</span> <span class="keyword">typename</span> mpl::if_c&lt;is_mutable, ref_t, value_type&gt;::type reference;
316<a name="l00360"></a>00360 <span class="keyword">typedef</span> reference result_type;
317<a name="l00361"></a>00361
318<a name="l00362"></a>00362 <a class="code" href="g_i_l_0515.html" title="Function object that returns a grayscale reference of the N-th channel of a given...">nth_channel_deref_fn</a>(<span class="keywordtype">int</span> n=0) : _n(n) {}
319<a name="l00363"></a>00363 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> P&gt; <a class="code" href="g_i_l_0515.html" title="Function object that returns a grayscale reference of the N-th channel of a given...">nth_channel_deref_fn</a>(<span class="keyword">const</span> <a class="code" href="g_i_l_0515.html" title="Function object that returns a grayscale reference of the N-th channel of a given...">nth_channel_deref_fn&lt;P&gt;</a>&amp; d) : _n(d.<a class="code" href="g_i_l_0515.html#da0e3adfe5f3db62623fb73a49c120b3">_n</a>) {}
320<a name="l00364"></a>00364
321<a name="l00365"></a>00365 <span class="keywordtype">int</span> _n; <span class="comment">// the channel to use</span>
322<a name="l00366"></a>00366
323<a name="l00367"></a>00367 result_type operator()(argument_type srcP)<span class="keyword"> const </span>{
324<a name="l00368"></a>00368 <span class="keywordflow">return</span> result_type(srcP[_n]);
325<a name="l00369"></a>00369 }
326<a name="l00370"></a>00370 };
327<a name="l00371"></a>00371
328<a name="l00372"></a>00372 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt; <span class="keyword">struct </span>__nth_channel_view&lt;View,false&gt; {
329<a name="l00373"></a>00373 <span class="keyword">private</span>:
330<a name="l00374"></a>00374 <span class="keyword">typedef</span> <a class="code" href="g_i_l_0515.html" title="Function object that returns a grayscale reference of the N-th channel of a given...">nth_channel_deref_fn&lt;typename View::reference&gt;</a> deref_t;
331<a name="l00375"></a>00375 <span class="keyword">typedef</span> <span class="keyword">typename</span> View::template add_deref&lt;deref_t&gt; AD;
332<a name="l00376"></a>00376 <span class="keyword">public</span>:
333<a name="l00377"></a>00377 <span class="keyword">typedef</span> <span class="keyword">typename</span> AD::type type;
334<a name="l00378"></a>00378 <span class="keyword">static</span> type make(<span class="keyword">const</span> View&amp; src, <span class="keywordtype">int</span> n) {
335<a name="l00379"></a>00379 <span class="keywordflow">return</span> AD::make(src, deref_t(n));
336<a name="l00380"></a>00380 }
337<a name="l00381"></a>00381 };
338<a name="l00382"></a>00382 } <span class="comment">// namespace detail</span>
339<a name="l00383"></a>00383
340<a name="l00390"></a>00390 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
341<a name="l00391"></a><a class="code" href="g_i_l_0578.html">00391</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0578.html" title="Given a source image view type View, returns the type of an image view over a single...">nth_channel_view_type</a> {
342<a name="l00392"></a>00392 <span class="keyword">private</span>:
343<a name="l00393"></a>00393 GIL_CLASS_REQUIRE(View, boost::gil, <a class="code" href="g_i_l_0308.html" title="GIL&amp;#39;s 2-dimensional view over immutable GIL pixels.">ImageViewConcept</a>)
344<a name="l00394"></a>00394 <span class="keyword">typedef</span> detail::__nth_channel_view&lt;View,view_is_basic&lt;View&gt;::value&gt; VB;
345<a name="l00395"></a>00395 <span class="keyword">public</span>:
346<a name="l00396"></a>00396 <span class="keyword">typedef</span> <span class="keyword">typename</span> VB::type type;
347<a name="l00397"></a>00397 <span class="keyword">static</span> type make(<span class="keyword">const</span> View&amp; src, <span class="keywordtype">int</span> n) { <span class="keywordflow">return</span> VB::make(src,n); }
348<a name="l00398"></a>00398 };
349<a name="l00399"></a>00399
350<a name="l00400"></a>00400
351<a name="l00402"></a>00402 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> View&gt;
352<a name="l00403"></a>00403 <span class="keyword">typename</span> <a class="code" href="g_i_l_0578.html" title="Given a source image view type View, returns the type of an image view over a single...">nth_channel_view_type&lt;View&gt;::type</a> nth_channel_view(<span class="keyword">const</span> View&amp; src, <span class="keywordtype">int</span> n) {
353<a name="l00404"></a>00404 <span class="keywordflow">return</span> <a class="code" href="g_i_l_0578.html" title="Given a source image view type View, returns the type of an image view over a single...">nth_channel_view_type&lt;View&gt;::make</a>(src,n);
354<a name="l00405"></a>00405 }
355<a name="l00406"></a>00406
356<a name="l00407"></a>00407
357<a name="l00408"></a>00408
358<a name="l00409"></a>00409
359<a name="l00410"></a>00410
360<a name="l00411"></a>00411
361<a name="l00412"></a>00412
362<a name="l00416"></a>00416
363<a name="l00417"></a>00417 <span class="keyword">namespace </span>detail {
364<a name="l00418"></a>00418 <span class="keyword">template</span> &lt;<span class="keywordtype">int</span> K, <span class="keyword">typename</span> View, <span class="keywordtype">bool</span> AreChannelsTogether&gt; <span class="keyword">struct </span>__kth_channel_view_basic;
365<a name="l00419"></a>00419
366<a name="l00420"></a>00420 <span class="comment">// kth_channel_view when the channels are not adjacent in memory. This can happen for multi-channel interleaved images </span>
367<a name="l00421"></a>00421 <span class="comment">// or images with a step</span>
368<a name="l00422"></a>00422 <span class="keyword">template</span> &lt;<span class="keywordtype">int</span> K, <span class="keyword">typename</span> View&gt;
369<a name="l00423"></a>00423 <span class="keyword">struct </span>__kth_channel_view_basic&lt;K,View,false&gt; {
370<a name="l00424"></a>00424 <span class="keyword">private</span>:
371<a name="l00425"></a>00425 <span class="keyword">typedef</span> <span class="keyword">typename</span> kth_element_type&lt;typename View::value_type,K&gt;::type channel_t;
372<a name="l00426"></a>00426 <span class="keyword">public</span>:
373<a name="l00427"></a>00427 <span class="keyword">typedef</span> <span class="keyword">typename</span> view_type&lt;channel_t, gray_layout_t, false, true, view_is_mutable&lt;View&gt;::value&gt;::type type;
374<a name="l00428"></a>00428
375<a name="l00429"></a>00429 <span class="keyword">static</span> type make(<span class="keyword">const</span> View&amp; src) {
376<a name="l00430"></a>00430 <span class="keyword">typedef</span> <span class="keyword">typename</span> type::xy_locator locator_t;
377<a name="l00431"></a>00431 <span class="keyword">typedef</span> <span class="keyword">typename</span> type::x_iterator x_iterator_t;
378<a name="l00432"></a>00432 <span class="keyword">typedef</span> <span class="keyword">typename</span> iterator_adaptor_get_base&lt;x_iterator_t&gt;::type x_iterator_base_t;
379<a name="l00433"></a>00433 x_iterator_t sit(x_iterator_base_t(&amp;at_c&lt;K&gt;(src(0,0))),src.pixels().pixel_size());
380<a name="l00434"></a>00434 <span class="keywordflow">return</span> type(src.dimensions(),locator_t(sit, src.pixels().row_size()));
381<a name="l00435"></a>00435 }
382<a name="l00436"></a>00436 };
383<a name="l00437"></a>00437
384<a name="l00438"></a>00438 <span class="comment">// kth_channel_view when the channels are together in memory (true for simple grayscale or planar images)</span>
385<a name="l00439"></a>00439 <span class="keyword">template</span> &lt;<span class="keywordtype">int</span> K, <span class="keyword">typename</span> View&gt;
386<a name="l00440"></a>00440 <span class="keyword">struct </span>__kth_channel_view_basic&lt;K,View,true&gt; {
387<a name="l00441"></a>00441 <span class="keyword">private</span>:
388<a name="l00442"></a>00442 <span class="keyword">typedef</span> <span class="keyword">typename</span> kth_element_type&lt;typename View::value_type, K&gt;::type channel_t;
389<a name="l00443"></a>00443 <span class="keyword">public</span>:
390<a name="l00444"></a>00444 <span class="keyword">typedef</span> <span class="keyword">typename</span> view_type&lt;channel_t, gray_layout_t, false, false, view_is_mutable&lt;View&gt;::value&gt;::type type;
391<a name="l00445"></a>00445 <span class="keyword">static</span> type make(<span class="keyword">const</span> View&amp; src) {
392<a name="l00446"></a>00446 <span class="keyword">typedef</span> <span class="keyword">typename</span> type::x_iterator x_iterator_t;
393<a name="l00447"></a>00447 <span class="keywordflow">return</span> <a class="code" href="g_i_l_0140.html#g558c29855a5b73404d4d21f22832a624" title="Constructing image views from raw interleaved pixel data.">interleaved_view</a>(src.width(),src.height(),(x_iterator_t)&amp;at_c&lt;K&gt;(src(0,0)), src.pixels().row_size());
394<a name="l00448"></a>00448 }
395<a name="l00449"></a>00449 };
396<a name="l00450"></a>00450
397<a name="l00451"></a>00451 <span class="keyword">template</span> &lt;<span class="keywordtype">int</span> K, <span class="keyword">typename</span> View, <span class="keywordtype">bool</span> IsBasic&gt; <span class="keyword">struct </span>__kth_channel_view;
398<a name="l00452"></a>00452
399<a name="l00453"></a>00453 <span class="comment">// For basic (memory-based) views dispatch to __kth_channel_view_basic</span>
400<a name="l00454"></a>00454 <span class="keyword">template</span> &lt;<span class="keywordtype">int</span> K, <span class="keyword">typename</span> View&gt; <span class="keyword">struct </span>__kth_channel_view&lt;K,View,true&gt; {
401<a name="l00455"></a>00455 <span class="keyword">private</span>:
402<a name="l00456"></a>00456 <span class="keyword">typedef</span> <span class="keyword">typename</span> View::x_iterator src_x_iterator;
403<a name="l00457"></a>00457
404<a name="l00458"></a>00458 <span class="comment">// Determines whether the channels of a given pixel iterator are adjacent in memory.</span>
405<a name="l00459"></a>00459 <span class="comment">// Planar and grayscale iterators have channels adjacent in memory, whereas multi-channel interleaved and iterators with non-fundamental step do not.</span>
406<a name="l00460"></a>00460 BOOST_STATIC_CONSTANT(<span class="keywordtype">bool</span>, adjacent=
407<a name="l00461"></a>00461 !iterator_is_step&lt;src_x_iterator&gt;::value &amp;&amp;
408<a name="l00462"></a>00462 (is_planar&lt;src_x_iterator&gt;::value ||
409<a name="l00463"></a>00463 num_channels&lt;View&gt;::value==1));
410<a name="l00464"></a>00464 <span class="keyword">public</span>:
411<a name="l00465"></a>00465 <span class="keyword">typedef</span> <span class="keyword">typename</span> __kth_channel_view_basic&lt;K,View,adjacent&gt;::type type;
412<a name="l00466"></a>00466
413<a name="l00467"></a>00467 <span class="keyword">static</span> type make(<span class="keyword">const</span> View&amp; src) {
414<a name="l00468"></a>00468 <span class="keywordflow">return</span> __kth_channel_view_basic&lt;K,View,adjacent&gt;::make(src);
415<a name="l00469"></a>00469 }
416<a name="l00470"></a>00470 };
417<a name="l00471"></a>00471
418<a name="l00476"></a>00476 <span class="keyword">template</span> &lt;<span class="keywordtype">int</span> K, <span class="keyword">typename</span> SrcP&gt; <span class="comment">// SrcP is a reference to PixelConcept (could be pixel value or const/non-const reference)</span>
419<a name="l00477"></a>00477 <span class="comment">// Examples: pixel&lt;T,L&gt;, pixel&lt;T,L&gt;&amp;, const pixel&lt;T,L&gt;&amp;, planar_pixel_reference&lt;T&amp;,L&gt;, planar_pixel_reference&lt;const T&amp;,L&gt;</span>
420<a name="l00478"></a><a class="code" href="g_i_l_0513.html">00478</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0513.html" title="Function object that returns a grayscale reference of the K-th channel (specified...">kth_channel_deref_fn</a> {
421<a name="l00479"></a>00479 BOOST_STATIC_CONSTANT(<span class="keywordtype">bool</span>, is_mutable=<a class="code" href="g_i_l_0600.html" title="Given a model of a pixel, determines whether the model represents a pixel reference...">pixel_is_reference&lt;SrcP&gt;::value</a> &amp;&amp; <a class="code" href="g_i_l_0602.html" title="Determines if the given pixel reference is mutable (i.e. its channels can be changed)...">pixel_reference_is_mutable&lt;SrcP&gt;::value</a>);
422<a name="l00480"></a>00480 <span class="keyword">private</span>:
423<a name="l00481"></a>00481 <span class="keyword">typedef</span> <span class="keyword">typename</span> remove_reference&lt;SrcP&gt;::type src_pixel_t;
424<a name="l00482"></a>00482 <span class="keyword">typedef</span> <span class="keyword">typename</span> kth_element_type&lt;src_pixel_t, K&gt;::type channel_t;
425<a name="l00483"></a>00483 <span class="keyword">typedef</span> <span class="keyword">typename</span> src_pixel_t::const_reference const_ref_t;
426<a name="l00484"></a>00484 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="g_i_l_0604.html" title="Returns the type of a homogeneous pixel reference given the channel type, layout...">pixel_reference_type&lt;channel_t,gray_layout_t,false,is_mutable&gt;::type</a> ref_t;
427<a name="l00485"></a>00485 <span class="keyword">public</span>:
428<a name="l00486"></a>00486 <span class="keyword">typedef</span> <a class="code" href="g_i_l_0513.html" title="Function object that returns a grayscale reference of the K-th channel (specified...">kth_channel_deref_fn&lt;K,const_ref_t&gt;</a> <a class="code" href="g_i_l_0513.html" title="Function object that returns a grayscale reference of the K-th channel (specified...">const_t</a>;
429<a name="l00487"></a>00487 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="g_i_l_0606.html" title="Returns the type of a homogeneous pixel given the channel type and layout.">pixel_value_type&lt;channel_t,gray_layout_t&gt;::type</a> <a class="code" href="g_i_l_0599.html" title="Represents a pixel value (a container of channels). Models: HomogeneousColorBaseValueConcept...">value_type</a>;
430<a name="l00488"></a>00488 <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="g_i_l_0604.html" title="Returns the type of a homogeneous pixel reference given the channel type, layout...">pixel_reference_type&lt;channel_t,gray_layout_t,false,false&gt;::type</a> const_reference;
431<a name="l00489"></a>00489 <span class="keyword">typedef</span> SrcP argument_type;
432<a name="l00490"></a>00490 <span class="keyword">typedef</span> <span class="keyword">typename</span> mpl::if_c&lt;is_mutable, ref_t, value_type&gt;::type reference;
433<a name="l00491"></a>00491 <span class="keyword">typedef</span> reference result_type;
434<a name="l00492"></a>00492
435<a name="l00493"></a>00493 <a class="code" href="g_i_l_0513.html" title="Function object that returns a grayscale reference of the K-th channel (specified...">kth_channel_deref_fn</a>() {}
436<a name="l00494"></a>00494 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> P&gt; <a class="code" href="g_i_l_0513.html" title="Function object that returns a grayscale reference of the K-th channel (specified...">kth_channel_deref_fn</a>(<span class="keyword">const</span> <a class="code" href="g_i_l_0513.html" title="Function object that returns a grayscale reference of the K-th channel (specified...">kth_channel_deref_fn&lt;K,P&gt;</a>&amp;) {}
437<a name="l00495"></a>00495
438<a name="l00496"></a>00496 result_type operator()(argument_type srcP)<span class="keyword"> const </span>{
439<a name="l00497"></a>00497 <span class="keywordflow">return</span> result_type(at_c&lt;K&gt;(srcP));
440<a name="l00498"></a>00498 }
441<a name="l00499"></a>00499 };
442<a name="l00500"></a>00500
443<a name="l00501"></a>00501 <span class="keyword">template</span> &lt;<span class="keywordtype">int</span> K, <span class="keyword">typename</span> View&gt; <span class="keyword">struct </span>__kth_channel_view&lt;K,View,false&gt; {
444<a name="l00502"></a>00502 <span class="keyword">private</span>:
445<a name="l00503"></a>00503 <span class="keyword">typedef</span> <a class="code" href="g_i_l_0513.html" title="Function object that returns a grayscale reference of the K-th channel (specified...">kth_channel_deref_fn&lt;K,typename View::reference&gt;</a> deref_t;
446<a name="l00504"></a>00504 <span class="keyword">typedef</span> <span class="keyword">typename</span> View::template add_deref&lt;deref_t&gt; AD;
447<a name="l00505"></a>00505 <span class="keyword">public</span>:
448<a name="l00506"></a>00506 <span class="keyword">typedef</span> <span class="keyword">typename</span> AD::type type;
449<a name="l00507"></a>00507 <span class="keyword">static</span> type make(<span class="keyword">const</span> View&amp; src) {
450<a name="l00508"></a>00508 <span class="keywordflow">return</span> AD::make(src, deref_t());
451<a name="l00509"></a>00509 }
452<a name="l00510"></a>00510 };
453<a name="l00511"></a>00511 } <span class="comment">// namespace detail</span>
454<a name="l00512"></a>00512
455<a name="l00519"></a>00519 <span class="keyword">template</span> &lt;<span class="keywordtype">int</span> K, <span class="keyword">typename</span> View&gt;
456<a name="l00520"></a><a class="code" href="g_i_l_0559.html">00520</a> <span class="keyword">struct </span><a class="code" href="g_i_l_0559.html" title="Given a source image view type View, returns the type of an image view over a given...">kth_channel_view_type</a> {
457<a name="l00521"></a>00521 <span class="keyword">private</span>:
458<a name="l00522"></a>00522 GIL_CLASS_REQUIRE(View, boost::gil, <a class="code" href="g_i_l_0308.html" title="GIL&amp;#39;s 2-dimensional view over immutable GIL pixels.">ImageViewConcept</a>)
459<a name="l00523"></a>00523 <span class="keyword">typedef</span> detail::__kth_channel_view&lt;K,View,view_is_basic&lt;View&gt;::value&gt; VB;
460<a name="l00524"></a>00524 <span class="keyword">public</span>:
461<a name="l00525"></a>00525 <span class="keyword">typedef</span> <span class="keyword">typename</span> VB::type type;
462<a name="l00526"></a>00526 <span class="keyword">static</span> type make(<span class="keyword">const</span> View&amp; src) { <span class="keywordflow">return</span> VB::make(src); }
463<a name="l00527"></a>00527 };
464<a name="l00528"></a>00528
465<a name="l00530"></a>00530 <span class="keyword">template</span> &lt;<span class="keywordtype">int</span> K, <span class="keyword">typename</span> View&gt;
466<a name="l00531"></a>00531 <span class="keyword">typename</span> <a class="code" href="g_i_l_0559.html" title="Given a source image view type View, returns the type of an image view over a given...">kth_channel_view_type&lt;K,View&gt;::type</a> kth_channel_view(<span class="keyword">const</span> View&amp; src) {
467<a name="l00532"></a>00532 <span class="keywordflow">return</span> <a class="code" href="g_i_l_0559.html" title="Given a source image view type View, returns the type of an image view over a given...">kth_channel_view_type&lt;K,View&gt;::make</a>(src);
468<a name="l00533"></a>00533 }
469<a name="l00534"></a>00534
470<a name="l00535"></a>00535 } } <span class="comment">// namespace boost::gil</span>
471<a name="l00536"></a>00536
472<a name="l00537"></a>00537 <span class="preprocessor">#endif</span>
473</pre></div></div>
474<hr size="1"><address style="text-align: right;"><small>Generated on Sat May 2 13:50:14 2009 for Generic Image Library by&nbsp;
475<a href="http://www.doxygen.org/index.html">
476<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.6 </small></address>
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