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<h1>color_base.hpp</h1><a href="g_i_l_0067.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://stlab.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_COLOR_BASE_HPP</span>
<a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#define GIL_COLOR_BASE_HPP</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 <boost/mpl/range_c.hpp></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <boost/mpl/size.hpp></span>
<a name="l00028"></a>00028 <span class="preprocessor">#include <boost/mpl/vector_c.hpp></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <boost/type_traits.hpp></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include <boost/utility/enable_if.hpp></span>
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="preprocessor">#include "<a class="code" href="g_i_l_0094.html" title="GIL configuration file.">gil_config.hpp</a>"</span>
<a name="l00033"></a>00033 <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="l00034"></a>00034 <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="l00035"></a>00035
<a name="l00036"></a>00036 <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="comment">// Forward-declare</span>
<a name="l00039"></a>00039 <span class="keyword">template</span> <<span class="keyword">typename</span> P> P* memunit_advanced(<span class="keyword">const</span> P* p, std::ptrdiff_t diff);
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <span class="comment">// Forward-declare semantic_at_c</span>
<a name="l00042"></a>00042 <span class="keyword">template</span> <<span class="keywordtype">int</span> K, <span class="keyword">typename</span> ColorBase>
<a name="l00043"></a>00043 <span class="keyword">typename</span> disable_if<is_const<ColorBase>,<span class="keyword">typename</span> kth_semantic_element_reference_type<ColorBase,K>::type>::type <a class="code" href="g_i_l_0114.html#gba9e03ce04fda71e2e840c10325b8b11" title="A constant accessor to the K-th semantic element of a color base.">semantic_at_c</a>(ColorBase& p);
<a name="l00044"></a>00044 <span class="keyword">template</span> <<span class="keywordtype">int</span> K, <span class="keyword">typename</span> ColorBase>
<a name="l00045"></a>00045 <span class="keyword">typename</span> kth_semantic_element_const_reference_type<ColorBase,K>::type <a class="code" href="g_i_l_0114.html#gba9e03ce04fda71e2e840c10325b8b11" title="A constant accessor to the K-th semantic element of a color base.">semantic_at_c</a>(<span class="keyword">const</span> ColorBase& p);
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="comment">// Forward declare element_reference_type</span>
<a name="l00048"></a>00048 <span class="keyword">template</span> <<span class="keyword">typename</span> ColorBase> <span class="keyword">struct </span>element_reference_type;
<a name="l00049"></a>00049 <span class="keyword">template</span> <<span class="keyword">typename</span> ColorBase> <span class="keyword">struct </span>element_const_reference_type;
<a name="l00050"></a>00050 <span class="keyword">template</span> <<span class="keyword">typename</span> ColorBase, <span class="keywordtype">int</span> K> <span class="keyword">struct </span>kth_element_type;
<a name="l00051"></a>00051 <span class="keyword">template</span> <<span class="keyword">typename</span> ColorBase, <span class="keywordtype">int</span> K> <span class="keyword">struct </span>kth_element_type<const ColorBase,K> : <span class="keyword">public</span> kth_element_type<ColorBase,K> {};
<a name="l00052"></a>00052 <span class="keyword">template</span> <<span class="keyword">typename</span> ColorBase, <span class="keywordtype">int</span> K> <span class="keyword">struct </span>kth_element_reference_type;
<a name="l00053"></a>00053 <span class="keyword">template</span> <<span class="keyword">typename</span> ColorBase, <span class="keywordtype">int</span> K> <span class="keyword">struct </span>kth_element_reference_type<const ColorBase,K> : <span class="keyword">public</span> kth_element_reference_type<ColorBase,K> {};
<a name="l00054"></a>00054 <span class="keyword">template</span> <<span class="keyword">typename</span> ColorBase, <span class="keywordtype">int</span> K> <span class="keyword">struct </span>kth_element_const_reference_type;
<a name="l00055"></a>00055 <span class="keyword">template</span> <<span class="keyword">typename</span> ColorBase, <span class="keywordtype">int</span> K> <span class="keyword">struct </span>kth_element_const_reference_type<const ColorBase,K> : <span class="keyword">public</span> kth_element_const_reference_type<ColorBase,K> {};
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="keyword">namespace </span>detail {
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keyword">template</span> <<span class="keyword">typename</span> DstLayout, <span class="keyword">typename</span> SrcLayout, <span class="keywordtype">int</span> K>
<a name="l00060"></a>00060 <span class="keyword">struct </span>mapping_transform
<a name="l00061"></a>00061 : <span class="keyword">public</span> mpl::at<typename SrcLayout::channel_mapping_t,
<a name="l00062"></a>00062 typename detail::type_to_index<typename DstLayout::channel_mapping_t,mpl::integral_c<int,K> >::type
<a name="l00063"></a>00063 >::type {};
<a name="l00064"></a>00064
<a name="l00069"></a>00069
<a name="l00070"></a>00070
<a name="l00073"></a>00073 <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout>
<a name="l00074"></a><a class="code" href="g_i_l_0499.html">00074</a> <span class="keyword">struct </span>homogeneous_color_base<Element,Layout,1> {
<a name="l00075"></a>00075 <span class="keyword">private</span>:
<a name="l00076"></a>00076 Element _v0;
<a name="l00077"></a>00077 <span class="keyword">public</span>:
<a name="l00078"></a>00078 <span class="keyword">typedef</span> Layout layout_t;
<a name="l00079"></a>00079 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<0>) { <span class="keywordflow">return</span> _v0; }
<a name="l00080"></a>00080 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<0>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v0; }
<a name="l00081"></a>00081
<a name="l00082"></a>00082 homogeneous_color_base() {}
<a name="l00083"></a>00083 homogeneous_color_base(Element v) : _v0(v) {}
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="comment">// grayscale pixel values are convertible to channel type</span>
<a name="l00086"></a>00086 operator Element ()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v0; }
<a name="l00087"></a>00087
<a name="l00088"></a>00088 <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2> homogeneous_color_base(<span class="keyword">const</span> homogeneous_color_base<E2,L2,1>& c) : _v0(at_c<0>(c)) {}
<a name="l00089"></a>00089 };
<a name="l00090"></a>00090
<a name="l00091"></a>00091
<a name="l00094"></a>00094 <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout>
<a name="l00095"></a><a class="code" href="g_i_l_0501.html">00095</a> <span class="keyword">struct </span>homogeneous_color_base<Element,Layout,2> {
<a name="l00096"></a>00096 <span class="keyword">private</span>:
<a name="l00097"></a>00097 Element _v0, _v1;
<a name="l00098"></a>00098 <span class="keyword">public</span>:
<a name="l00099"></a>00099 <span class="keyword">typedef</span> Layout layout_t;
<a name="l00100"></a>00100 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<0>) { <span class="keywordflow">return</span> _v0; }
<a name="l00101"></a>00101 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<0>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v0; }
<a name="l00102"></a>00102 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<1>) { <span class="keywordflow">return</span> _v1; }
<a name="l00103"></a>00103 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<1>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v1; }
<a name="l00104"></a>00104
<a name="l00105"></a>00105 homogeneous_color_base() {}
<a name="l00106"></a>00106 <span class="keyword">explicit</span> homogeneous_color_base(Element v) : _v0(v), _v1(v) {}
<a name="l00107"></a>00107 homogeneous_color_base(Element v0, Element v1) : _v0(v0), _v1(v1) {}
<a name="l00108"></a>00108
<a name="l00109"></a>00109 <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2> homogeneous_color_base(<span class="keyword">const</span> homogeneous_color_base<E2,L2,2>& c) :
<a name="l00110"></a>00110 _v0(at_c<mapping_transform<Layout,L2,0>::value>(c)),
<a name="l00111"></a>00111 _v1(at_c<mapping_transform<Layout,L2,1>::value>(c)) {}
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="comment">// Support for l-value reference proxy copy construction</span>
<a name="l00114"></a>00114 <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2> homogeneous_color_base( homogeneous_color_base<E2,L2,2>& c) :
<a name="l00115"></a>00115 _v0(at_c<mapping_transform<Layout,L2,0>::value>(c)),
<a name="l00116"></a>00116 _v1(at_c<mapping_transform<Layout,L2,1>::value>(c)) {}
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="comment">// Support for planar_pixel_iterator construction and dereferencing</span>
<a name="l00119"></a>00119 <span class="keyword">template</span> <<span class="keyword">typename</span> P> homogeneous_color_base(P* p,<span class="keywordtype">bool</span>) :
<a name="l00120"></a>00120 _v0(&semantic_at_c<0>(*p)),
<a name="l00121"></a>00121 _v1(&semantic_at_c<1>(*p)) {}
<a name="l00122"></a>00122 <span class="keyword">template</span> <<span class="keyword">typename</span> Ref> Ref deref()<span class="keyword"> const </span>{
<a name="l00123"></a>00123 <span class="keywordflow">return</span> Ref(*semantic_at_c<0>(*<span class="keyword">this</span>),
<a name="l00124"></a>00124 *semantic_at_c<1>(*<span class="keyword">this</span>)); }
<a name="l00125"></a>00125
<a name="l00126"></a>00126 <span class="comment">// Support for planar_pixel_reference offset constructor</span>
<a name="l00127"></a>00127 <span class="keyword">template</span> <<span class="keyword">typename</span> Ptr> homogeneous_color_base(<span class="keyword">const</span> Ptr& ptr, std::ptrdiff_t diff)
<a name="l00128"></a>00128 : _v0(*memunit_advanced(semantic_at_c<0>(ptr),diff)),
<a name="l00129"></a>00129 _v1(*memunit_advanced(semantic_at_c<1>(ptr),diff)) {}
<a name="l00130"></a>00130
<a name="l00131"></a>00131 <span class="comment">// Support for planar_pixel_reference operator[]</span>
<a name="l00132"></a>00132 Element at_c_dynamic(std::size_t i)<span class="keyword"> const </span>{
<a name="l00133"></a>00133 <span class="keywordflow">if</span> (i==0) <span class="keywordflow">return</span> _v0;
<a name="l00134"></a>00134 <span class="keywordflow">return</span> _v1;
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136 };
<a name="l00137"></a>00137
<a name="l00140"></a>00140 <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout>
<a name="l00141"></a><a class="code" href="g_i_l_0503.html">00141</a> <span class="keyword">struct </span>homogeneous_color_base<Element,Layout,3> {
<a name="l00142"></a>00142 <span class="keyword">private</span>:
<a name="l00143"></a>00143 Element _v0, _v1, _v2;
<a name="l00144"></a>00144 <span class="keyword">public</span>:
<a name="l00145"></a>00145 <span class="keyword">typedef</span> Layout layout_t;
<a name="l00146"></a>00146 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<0>) { <span class="keywordflow">return</span> _v0; }
<a name="l00147"></a>00147 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<0>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v0; }
<a name="l00148"></a>00148 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<1>) { <span class="keywordflow">return</span> _v1; }
<a name="l00149"></a>00149 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<1>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v1; }
<a name="l00150"></a>00150 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<2>) { <span class="keywordflow">return</span> _v2; }
<a name="l00151"></a>00151 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<2>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v2; }
<a name="l00152"></a>00152
<a name="l00153"></a>00153 homogeneous_color_base() {}
<a name="l00154"></a>00154 <span class="keyword">explicit</span> homogeneous_color_base(Element v) : _v0(v), _v1(v), _v2(v) {}
<a name="l00155"></a>00155 homogeneous_color_base(Element v0, Element v1, Element v2) : _v0(v0), _v1(v1), _v2(v2) {}
<a name="l00156"></a>00156
<a name="l00157"></a>00157 <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2> homogeneous_color_base(<span class="keyword">const</span> homogeneous_color_base<E2,L2,3>& c) :
<a name="l00158"></a>00158 _v0(at_c<mapping_transform<Layout,L2,0>::value>(c)),
<a name="l00159"></a>00159 _v1(at_c<mapping_transform<Layout,L2,1>::value>(c)),
<a name="l00160"></a>00160 _v2(at_c<mapping_transform<Layout,L2,2>::value>(c)) {}
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <span class="comment">// Support for l-value reference proxy copy construction</span>
<a name="l00163"></a>00163 <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2> homogeneous_color_base( homogeneous_color_base<E2,L2,3>& c) :
<a name="l00164"></a>00164 _v0(at_c<mapping_transform<Layout,L2,0>::value>(c)),
<a name="l00165"></a>00165 _v1(at_c<mapping_transform<Layout,L2,1>::value>(c)),
<a name="l00166"></a>00166 _v2(at_c<mapping_transform<Layout,L2,2>::value>(c)) {}
<a name="l00167"></a>00167
<a name="l00168"></a>00168 <span class="comment">// Support for planar_pixel_iterator construction and dereferencing</span>
<a name="l00169"></a>00169 <span class="keyword">template</span> <<span class="keyword">typename</span> P> homogeneous_color_base(P* p,<span class="keywordtype">bool</span>) :
<a name="l00170"></a>00170 _v0(&semantic_at_c<0>(*p)),
<a name="l00171"></a>00171 _v1(&semantic_at_c<1>(*p)),
<a name="l00172"></a>00172 _v2(&semantic_at_c<2>(*p)) {}
<a name="l00173"></a>00173 <span class="keyword">template</span> <<span class="keyword">typename</span> Ref> Ref deref()<span class="keyword"> const </span>{
<a name="l00174"></a>00174 <span class="keywordflow">return</span> Ref(*semantic_at_c<0>(*<span class="keyword">this</span>),
<a name="l00175"></a>00175 *semantic_at_c<1>(*<span class="keyword">this</span>),
<a name="l00176"></a>00176 *semantic_at_c<2>(*<span class="keyword">this</span>)); }
<a name="l00177"></a>00177
<a name="l00178"></a>00178 <span class="comment">// Support for planar_pixel_reference offset constructor</span>
<a name="l00179"></a>00179 <span class="keyword">template</span> <<span class="keyword">typename</span> Ptr> homogeneous_color_base(<span class="keyword">const</span> Ptr& ptr, std::ptrdiff_t diff)
<a name="l00180"></a>00180 : _v0(*memunit_advanced(semantic_at_c<0>(ptr),diff)),
<a name="l00181"></a>00181 _v1(*memunit_advanced(semantic_at_c<1>(ptr),diff)),
<a name="l00182"></a>00182 _v2(*memunit_advanced(semantic_at_c<2>(ptr),diff)) {}
<a name="l00183"></a>00183
<a name="l00184"></a>00184 <span class="comment">// Support for planar_pixel_reference operator[]</span>
<a name="l00185"></a>00185 Element at_c_dynamic(std::size_t i)<span class="keyword"> const </span>{
<a name="l00186"></a>00186 <span class="keywordflow">switch</span> (i) {
<a name="l00187"></a>00187 <span class="keywordflow">case</span> 0: <span class="keywordflow">return</span> _v0;
<a name="l00188"></a>00188 <span class="keywordflow">case</span> 1: <span class="keywordflow">return</span> _v1;
<a name="l00189"></a>00189 }
<a name="l00190"></a>00190 <span class="keywordflow">return</span> _v2;
<a name="l00191"></a>00191 }
<a name="l00192"></a>00192 };
<a name="l00193"></a>00193
<a name="l00196"></a>00196 <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout>
<a name="l00197"></a><a class="code" href="g_i_l_0505.html">00197</a> <span class="keyword">struct </span>homogeneous_color_base<Element,Layout,4> {
<a name="l00198"></a>00198 <span class="keyword">private</span>:
<a name="l00199"></a>00199 Element _v0, _v1, _v2, _v3;
<a name="l00200"></a>00200 <span class="keyword">public</span>:
<a name="l00201"></a>00201 <span class="keyword">typedef</span> Layout layout_t;
<a name="l00202"></a>00202 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<0>) { <span class="keywordflow">return</span> _v0; }
<a name="l00203"></a>00203 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<0>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v0; }
<a name="l00204"></a>00204 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<1>) { <span class="keywordflow">return</span> _v1; }
<a name="l00205"></a>00205 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<1>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v1; }
<a name="l00206"></a>00206 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<2>) { <span class="keywordflow">return</span> _v2; }
<a name="l00207"></a>00207 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<2>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v2; }
<a name="l00208"></a>00208 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<3>) { <span class="keywordflow">return</span> _v3; }
<a name="l00209"></a>00209 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<3>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v3; }
<a name="l00210"></a>00210 homogeneous_color_base() {}
<a name="l00211"></a>00211 <span class="keyword">explicit</span> homogeneous_color_base(Element v) : _v0(v), _v1(v), _v2(v), _v3(v) {}
<a name="l00212"></a>00212 homogeneous_color_base(Element v0, Element v1, Element v2, Element v3) : _v0(v0), _v1(v1), _v2(v2), _v3(v3) {}
<a name="l00213"></a>00213
<a name="l00214"></a>00214 <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2> homogeneous_color_base(<span class="keyword">const</span> homogeneous_color_base<E2,L2,4>& c) :
<a name="l00215"></a>00215 _v0(at_c<mapping_transform<Layout,L2,0>::value>(c)),
<a name="l00216"></a>00216 _v1(at_c<mapping_transform<Layout,L2,1>::value>(c)),
<a name="l00217"></a>00217 _v2(at_c<mapping_transform<Layout,L2,2>::value>(c)),
<a name="l00218"></a>00218 _v3(at_c<mapping_transform<Layout,L2,3>::value>(c)) {}
<a name="l00219"></a>00219
<a name="l00220"></a>00220 <span class="comment">// Support for l-value reference proxy copy construction</span>
<a name="l00221"></a>00221 <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2> homogeneous_color_base( homogeneous_color_base<E2,L2,4>& c) :
<a name="l00222"></a>00222 _v0(at_c<mapping_transform<Layout,L2,0>::value>(c)),
<a name="l00223"></a>00223 _v1(at_c<mapping_transform<Layout,L2,1>::value>(c)),
<a name="l00224"></a>00224 _v2(at_c<mapping_transform<Layout,L2,2>::value>(c)),
<a name="l00225"></a>00225 _v3(at_c<mapping_transform<Layout,L2,3>::value>(c)) {}
<a name="l00226"></a>00226
<a name="l00227"></a>00227 <span class="comment">// Support for planar_pixel_iterator construction and dereferencing</span>
<a name="l00228"></a>00228 <span class="keyword">template</span> <<span class="keyword">typename</span> P> homogeneous_color_base(P* p,<span class="keywordtype">bool</span>) :
<a name="l00229"></a>00229 _v0(&semantic_at_c<0>(*p)),
<a name="l00230"></a>00230 _v1(&semantic_at_c<1>(*p)),
<a name="l00231"></a>00231 _v2(&semantic_at_c<2>(*p)),
<a name="l00232"></a>00232 _v3(&semantic_at_c<3>(*p)) {}
<a name="l00233"></a>00233
<a name="l00234"></a>00234 <span class="keyword">template</span> <<span class="keyword">typename</span> Ref> Ref deref()<span class="keyword"> const </span>{
<a name="l00235"></a>00235 <span class="keywordflow">return</span> Ref(*semantic_at_c<0>(*<span class="keyword">this</span>),
<a name="l00236"></a>00236 *semantic_at_c<1>(*<span class="keyword">this</span>),
<a name="l00237"></a>00237 *semantic_at_c<2>(*<span class="keyword">this</span>),
<a name="l00238"></a>00238 *semantic_at_c<3>(*<span class="keyword">this</span>)); }
<a name="l00239"></a>00239
<a name="l00240"></a>00240 <span class="comment">// Support for planar_pixel_reference offset constructor</span>
<a name="l00241"></a>00241 <span class="keyword">template</span> <<span class="keyword">typename</span> Ptr> homogeneous_color_base(<span class="keyword">const</span> Ptr& ptr, std::ptrdiff_t diff)
<a name="l00242"></a>00242 : _v0(*memunit_advanced(semantic_at_c<0>(ptr),diff)),
<a name="l00243"></a>00243 _v1(*memunit_advanced(semantic_at_c<1>(ptr),diff)),
<a name="l00244"></a>00244 _v2(*memunit_advanced(semantic_at_c<2>(ptr),diff)),
<a name="l00245"></a>00245 _v3(*memunit_advanced(semantic_at_c<3>(ptr),diff)) {}
<a name="l00246"></a>00246
<a name="l00247"></a>00247 <span class="comment">// Support for planar_pixel_reference operator[]</span>
<a name="l00248"></a>00248 Element at_c_dynamic(std::size_t i)<span class="keyword"> const </span>{
<a name="l00249"></a>00249 <span class="keywordflow">switch</span> (i) {
<a name="l00250"></a>00250 <span class="keywordflow">case</span> 0: <span class="keywordflow">return</span> _v0;
<a name="l00251"></a>00251 <span class="keywordflow">case</span> 1: <span class="keywordflow">return</span> _v1;
<a name="l00252"></a>00252 <span class="keywordflow">case</span> 2: <span class="keywordflow">return</span> _v2;
<a name="l00253"></a>00253 }
<a name="l00254"></a>00254 <span class="keywordflow">return</span> _v3;
<a name="l00255"></a>00255 }
<a name="l00256"></a>00256 };
<a name="l00257"></a>00257
<a name="l00260"></a>00260 <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout>
<a name="l00261"></a><a class="code" href="g_i_l_0507.html">00261</a> <span class="keyword">struct </span>homogeneous_color_base<Element,Layout,5> {
<a name="l00262"></a>00262 <span class="keyword">private</span>:
<a name="l00263"></a>00263 Element _v0, _v1, _v2, _v3, _v4;
<a name="l00264"></a>00264 <span class="keyword">public</span>:
<a name="l00265"></a>00265 <span class="keyword">typedef</span> Layout layout_t;
<a name="l00266"></a>00266 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<0>) { <span class="keywordflow">return</span> _v0; }
<a name="l00267"></a>00267 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<0>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v0; }
<a name="l00268"></a>00268 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<1>) { <span class="keywordflow">return</span> _v1; }
<a name="l00269"></a>00269 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<1>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v1; }
<a name="l00270"></a>00270 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<2>) { <span class="keywordflow">return</span> _v2; }
<a name="l00271"></a>00271 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<2>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v2; }
<a name="l00272"></a>00272 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<3>) { <span class="keywordflow">return</span> _v3; }
<a name="l00273"></a>00273 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<3>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v3; }
<a name="l00274"></a>00274 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<4>) { <span class="keywordflow">return</span> _v4; }
<a name="l00275"></a>00275 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base>::type</a> at(mpl::int_<4>)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _v4; }
<a name="l00276"></a>00276 homogeneous_color_base() {}
<a name="l00277"></a>00277 <span class="keyword">explicit</span> homogeneous_color_base(Element v) : _v0(v), _v1(v), _v2(v), _v3(v), _v4(v) {}
<a name="l00278"></a>00278 homogeneous_color_base(Element v0, Element v1, Element v2, Element v3, Element v4) : _v0(v0), _v1(v1), _v2(v2), _v3(v3), _v4(v4) {}
<a name="l00279"></a>00279
<a name="l00280"></a>00280 <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2> homogeneous_color_base(<span class="keyword">const</span> homogeneous_color_base<E2,L2,5>& c) :
<a name="l00281"></a>00281 _v0(at_c<mapping_transform<Layout,L2,0>::value>(c)),
<a name="l00282"></a>00282 _v1(at_c<mapping_transform<Layout,L2,1>::value>(c)),
<a name="l00283"></a>00283 _v2(at_c<mapping_transform<Layout,L2,2>::value>(c)),
<a name="l00284"></a>00284 _v3(at_c<mapping_transform<Layout,L2,3>::value>(c)),
<a name="l00285"></a>00285 _v4(at_c<mapping_transform<Layout,L2,4>::value>(c)) {}
<a name="l00286"></a>00286
<a name="l00287"></a>00287 <span class="comment">// Support for l-value reference proxy copy construction</span>
<a name="l00288"></a>00288 <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2> homogeneous_color_base( homogeneous_color_base<E2,L2,5>& c) :
<a name="l00289"></a>00289 _v0(at_c<mapping_transform<Layout,L2,0>::value>(c)),
<a name="l00290"></a>00290 _v1(at_c<mapping_transform<Layout,L2,1>::value>(c)),
<a name="l00291"></a>00291 _v2(at_c<mapping_transform<Layout,L2,2>::value>(c)),
<a name="l00292"></a>00292 _v3(at_c<mapping_transform<Layout,L2,3>::value>(c)),
<a name="l00293"></a>00293 _v4(at_c<mapping_transform<Layout,L2,4>::value>(c)) {}
<a name="l00294"></a>00294
<a name="l00295"></a>00295 <span class="comment">// Support for planar_pixel_iterator construction and dereferencing</span>
<a name="l00296"></a>00296 <span class="keyword">template</span> <<span class="keyword">typename</span> P> homogeneous_color_base(P* p,<span class="keywordtype">bool</span>) :
<a name="l00297"></a>00297 _v0(&semantic_at_c<0>(*p)),
<a name="l00298"></a>00298 _v1(&semantic_at_c<1>(*p)),
<a name="l00299"></a>00299 _v2(&semantic_at_c<2>(*p)),
<a name="l00300"></a>00300 _v3(&semantic_at_c<3>(*p)),
<a name="l00301"></a>00301 _v4(&semantic_at_c<4>(*p)) {}
<a name="l00302"></a>00302
<a name="l00303"></a>00303 <span class="keyword">template</span> <<span class="keyword">typename</span> Ref> Ref deref()<span class="keyword"> const </span>{
<a name="l00304"></a>00304 <span class="keywordflow">return</span> Ref(*semantic_at_c<0>(*<span class="keyword">this</span>),
<a name="l00305"></a>00305 *semantic_at_c<1>(*<span class="keyword">this</span>),
<a name="l00306"></a>00306 *semantic_at_c<2>(*<span class="keyword">this</span>),
<a name="l00307"></a>00307 *semantic_at_c<3>(*<span class="keyword">this</span>),
<a name="l00308"></a>00308 *semantic_at_c<4>(*<span class="keyword">this</span>)); }
<a name="l00309"></a>00309
<a name="l00310"></a>00310 <span class="comment">// Support for planar_pixel_reference offset constructor</span>
<a name="l00311"></a>00311 <span class="keyword">template</span> <<span class="keyword">typename</span> Ptr> homogeneous_color_base(<span class="keyword">const</span> Ptr& ptr, std::ptrdiff_t diff)
<a name="l00312"></a>00312 : _v0(*memunit_advanced(semantic_at_c<0>(ptr),diff)),
<a name="l00313"></a>00313 _v1(*memunit_advanced(semantic_at_c<1>(ptr),diff)),
<a name="l00314"></a>00314 _v2(*memunit_advanced(semantic_at_c<2>(ptr),diff)),
<a name="l00315"></a>00315 _v3(*memunit_advanced(semantic_at_c<3>(ptr),diff)),
<a name="l00316"></a>00316 _v4(*memunit_advanced(semantic_at_c<4>(ptr),diff)) {}
<a name="l00317"></a>00317
<a name="l00318"></a>00318 <span class="comment">// Support for planar_pixel_reference operator[]</span>
<a name="l00319"></a>00319 Element at_c_dynamic(std::size_t i)<span class="keyword"> const </span>{
<a name="l00320"></a>00320 <span class="keywordflow">switch</span> (i) {
<a name="l00321"></a>00321 <span class="keywordflow">case</span> 0: <span class="keywordflow">return</span> _v0;
<a name="l00322"></a>00322 <span class="keywordflow">case</span> 1: <span class="keywordflow">return</span> _v1;
<a name="l00323"></a>00323 <span class="keywordflow">case</span> 2: <span class="keywordflow">return</span> _v2;
<a name="l00324"></a>00324 <span class="keywordflow">case</span> 3: <span class="keywordflow">return</span> _v3;
<a name="l00325"></a>00325 }
<a name="l00326"></a>00326 <span class="keywordflow">return</span> _v4;
<a name="l00327"></a>00327 }
<a name="l00328"></a>00328 };
<a name="l00329"></a>00329
<a name="l00330"></a>00330 <span class="comment">// The following way of casting adjacent channels (the contents of color_base) into an array appears to be unsafe</span>
<a name="l00331"></a>00331 <span class="comment">// -- there is no guarantee that the compiler won't add any padding between adjacent channels.</span>
<a name="l00332"></a>00332 <span class="comment">// Note, however, that GIL _must_ be compiled with compiler settings ensuring there is no padding in the color base structs.</span>
<a name="l00333"></a>00333 <span class="comment">// This is because the color base structs must model the interleaved organization in memory. In other words, the client may</span>
<a name="l00334"></a>00334 <span class="comment">// have existing RGB image in the form "RGBRGBRGB..." and we must be able to represent it with an array of RGB color bases (i.e. RGB pixels)</span>
<a name="l00335"></a>00335 <span class="comment">// with no padding. We have tested with char/int/float/double channels on gcc and VC and have so far discovered no problem.</span>
<a name="l00336"></a>00336 <span class="comment">// We have even tried using strange channels consisting of short + char (3 bytes). With the default 4-byte alignment on VC, the size</span>
<a name="l00337"></a>00337 <span class="comment">// of this channel is padded to 4 bytes, so an RGB pixel of it will be 4x3=12 bytes. The code below will still work properly.</span>
<a name="l00338"></a>00338 <span class="comment">// However, the client must nevertheless ensure that proper compiler settings are used for their compiler and their channel types.</span>
<a name="l00339"></a>00339
<a name="l00340"></a>00340 <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K>
<a name="l00341"></a>00341 <span class="keyword">typename</span> <a class="code" href="g_i_l_0534.html" title="Specifies the return type of the mutable element accessor at_c of a homogeneous color...">element_reference_type<homogeneous_color_base<Element,Layout,K></a> >::type
<a name="l00342"></a>00342 dynamic_at_c(homogeneous_color_base<Element,Layout,K>& cb, std::size_t i) {
<a name="l00343"></a>00343 assert(i<K);
<a name="l00344"></a>00344 <span class="keywordflow">return</span> (gil_reinterpret_cast<Element*>(&cb))[i];
<a name="l00345"></a>00345 }
<a name="l00346"></a>00346
<a name="l00347"></a>00347 <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K>
<a name="l00348"></a>00348 <span class="keyword">typename</span> <a class="code" href="g_i_l_0533.html" title="Specifies the return type of the constant element accessor at_c of a homogeneous...">element_const_reference_type<homogeneous_color_base<Element,Layout,K></a> >::type
<a name="l00349"></a>00349 dynamic_at_c(<span class="keyword">const</span> homogeneous_color_base<Element,Layout,K>& cb, std::size_t i) {
<a name="l00350"></a>00350 assert(i<K);
<a name="l00351"></a>00351 <span class="keywordflow">return</span> (gil_reinterpret_cast_c<const Element*>(&cb))[i];
<a name="l00352"></a>00352 }
<a name="l00353"></a>00353
<a name="l00354"></a>00354 <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K>
<a name="l00355"></a>00355 <span class="keyword">typename</span> element_reference_type<homogeneous_color_base<Element&,Layout,K> >::type
<a name="l00356"></a>00356 dynamic_at_c(<span class="keyword">const</span> homogeneous_color_base<Element&,Layout,K>& cb, std::size_t i) {
<a name="l00357"></a>00357 assert(i<K);
<a name="l00358"></a>00358 <span class="keywordflow">return</span> cb.at_c_dynamic(i);
<a name="l00359"></a>00359 }
<a name="l00360"></a>00360
<a name="l00361"></a>00361 <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K>
<a name="l00362"></a>00362 <span class="keyword">typename</span> element_const_reference_type<homogeneous_color_base<const Element&,Layout,K> >::type
<a name="l00363"></a>00363 dynamic_at_c(<span class="keyword">const</span> homogeneous_color_base<const Element&,Layout,K>& cb, std::size_t i) {
<a name="l00364"></a>00364 assert(i<K);
<a name="l00365"></a>00365 <span class="keywordflow">return</span> cb.at_c_dynamic(i);
<a name="l00366"></a>00366 }
<a name="l00367"></a>00367
<a name="l00368"></a>00368
<a name="l00369"></a>00369 } <span class="comment">// namespace detail</span>
<a name="l00370"></a>00370
<a name="l00371"></a>00371 <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K1, <span class="keywordtype">int</span> K>
<a name="l00372"></a>00372 <span class="keyword">struct </span>kth_element_type<detail::homogeneous_color_base<Element,Layout,K1>, K> {
<a name="l00373"></a>00373 <span class="keyword">typedef</span> Element type;
<a name="l00374"></a>00374 };
<a name="l00375"></a>00375
<a name="l00376"></a>00376 <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K1, <span class="keywordtype">int</span> K>
<a name="l00377"></a>00377 <span class="keyword">struct </span>kth_element_reference_type<detail::homogeneous_color_base<Element,Layout,K1>, K> : <span class="keyword">public</span> add_reference<Element> {};
<a name="l00378"></a>00378
<a name="l00379"></a>00379 <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K1, <span class="keywordtype">int</span> K>
<a name="l00380"></a>00380 <span class="keyword">struct </span>kth_element_const_reference_type<detail::homogeneous_color_base<Element,Layout,K1>, K> : <span class="keyword">public</span> add_reference<typename add_const<Element>::type> {};
<a name="l00381"></a>00381
<a name="l00384"></a>00384 <span class="keyword">template</span> <<span class="keywordtype">int</span> K, <span class="keyword">typename</span> E, <span class="keyword">typename</span> L, <span class="keywordtype">int</span> N> <span class="keyword">inline</span>
<a name="l00385"></a>00385 <span class="keyword">typename</span> add_reference<E>::type
<a name="l00386"></a><a class="code" href="g_i_l_0119.html#gd16b06024270e06a4e0ba5163da7ed15">00386</a> at_c( detail::homogeneous_color_base<E,L,N>& p) { <span class="keywordflow">return</span> p.at(mpl::int_<K>()); }
<a name="l00387"></a>00387
<a name="l00390"></a>00390 <span class="keyword">template</span> <<span class="keywordtype">int</span> K, <span class="keyword">typename</span> E, <span class="keyword">typename</span> L, <span class="keywordtype">int</span> N> <span class="keyword">inline</span>
<a name="l00391"></a>00391 <span class="keyword">typename</span> add_reference<typename add_const<E>::type>::type
<a name="l00392"></a><a class="code" href="g_i_l_0119.html#gd2561249354a1bea233ff2e53491583d">00392</a> at_c(<span class="keyword">const</span> detail::homogeneous_color_base<E,L,N>& p) { <span class="keywordflow">return</span> p.at(mpl::int_<K>()); }
<a name="l00393"></a>00393
<a name="l00394"></a>00394 <span class="keyword">namespace </span>detail {
<a name="l00395"></a>00395 <span class="keyword">struct </span>swap_fn {
<a name="l00396"></a>00396 <span class="keyword">template</span> <<span class="keyword">typename</span> T> <span class="keywordtype">void</span> operator()(T& x, T& y)<span class="keyword"> const </span>{
<a name="l00397"></a>00397 <span class="keyword">using</span> std::swap;
<a name="l00398"></a>00398 swap(x,y);
<a name="l00399"></a>00399 }
<a name="l00400"></a>00400 };
<a name="l00401"></a>00401 }
<a name="l00402"></a>00402 <span class="keyword">template</span> <<span class="keyword">typename</span> E, <span class="keyword">typename</span> L, <span class="keywordtype">int</span> N> <span class="keyword">inline</span>
<a name="l00403"></a>00403 <span class="keywordtype">void</span> swap(detail::homogeneous_color_base<E,L,N>& x, detail::homogeneous_color_base<E,L,N>& y) {
<a name="l00404"></a>00404 static_for_each(x,y,detail::swap_fn());
<a name="l00405"></a>00405 }
<a name="l00406"></a>00406
<a name="l00407"></a>00407
<a name="l00408"></a>00408 } } <span class="comment">// namespace boost::gil</span>
<a name="l00409"></a>00409
<a name="l00410"></a>00410 <span class="preprocessor">#endif</span>
</pre></div></div>
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