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- <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">//</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Copyright 2005-2007 Adobe Systems Incorporated</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Copyright 2019 Mateusz Loskot <mateusz at loskot dot net></span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// Distributed under the Boost Software License, Version 1.0</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// See accompanying file LICENSE_1_0.txt or copy at</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// http://www.boost.org/LICENSE_1_0.txt</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">//</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#ifndef BOOST_GIL_COLOR_BASE_HPP</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#define BOOST_GIL_COLOR_BASE_HPP</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <boost/gil/utilities.hpp></span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <boost/gil/concepts.hpp></span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include <boost/gil/detail/mp11.hpp></span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <boost/assert.hpp></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <boost/config.hpp></span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <type_traits></span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">// Forward-declare</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <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);</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">// Forward-declare semantic_at_c</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> K, <span class="keyword">typename</span> ColorBase></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">auto</span> <a class="code" href="group___color_base_algorithm_semantic_at_c.html#ga5aa277c761861eb6c540da0ba2e22d4e">semantic_at_c</a>(ColorBase& p)</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  -> <span class="keyword">typename</span> std::enable_if</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  !std::is_const<ColorBase>::value,</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keyword">typename</span> kth_semantic_element_reference_type<ColorBase, K>::type</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  >::type;</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> K, <span class="keyword">typename</span> ColorBase></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">typename</span> kth_semantic_element_const_reference_type<ColorBase,K>::type <a class="code" href="group___color_base_algorithm_semantic_at_c.html#ga5aa277c761861eb6c540da0ba2e22d4e">semantic_at_c</a>(<span class="keyword">const</span> ColorBase& p);</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment">// Forward declare element_reference_type</span></div><div class="line"><a name="l00040"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1element__reference__type.html"> 40</a></span> <span class="keyword">template</span> <<span class="keyword">typename</span> ColorBase> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type</a>;</div><div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1element__const__reference__type.html"> 41</a></span> <span class="keyword">template</span> <<span class="keyword">typename</span> ColorBase> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type</a>;</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <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;</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <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> {};</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <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;</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <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> {};</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <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;</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <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> {};</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="keyword">namespace </span>detail {</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="keyword">template</span> <<span class="keyword">typename</span> DstLayout, <span class="keyword">typename</span> SrcLayout, <span class="keywordtype">int</span> K></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="keyword">struct </span>mapping_transform : mp11::mp_at</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  typename SrcLayout::channel_mapping_t,</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  typename detail::type_to_index</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  typename DstLayout::channel_mapping_t,</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  std::integral_constant<int, K></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  ></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  >::type</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> {};</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#pragma warning(push)</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor">#pragma warning(disable:4512) //assignment operator could not be generated</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout></div><div class="line"><a name="l00078"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1detail_1_1homogeneous__color__base_3_01_element_00_01_layout_00_011_01_4.html"> 78</a></span> <span class="keyword">struct </span>homogeneous_color_base<Element, Layout, 1></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> {</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">using</span> layout_t = Layout;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  homogeneous_color_base() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  homogeneous_color_base(Element v) : v0_(v) {}</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  homogeneous_color_base(homogeneous_color_base<E2, L2, 1> <span class="keyword">const</span>& c)</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  : v0_(gil::at_c<0>(c))</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  {}</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 0>)</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  { <span class="keywordflow">return</span> v0_; }</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 0>) <span class="keyword">const</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  { <span class="keywordflow">return</span> v0_; }</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="comment">// grayscale pixel values are convertible to channel type</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="comment">// FIXME: explicit?</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keyword">operator</span> Element()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> v0_; }</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  Element v0_{};</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> };</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout></div><div class="line"><a name="l00110"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1detail_1_1homogeneous__color__base_3_01_element_00_01_layout_00_012_01_4.html"> 110</a></span> <span class="keyword">struct </span>homogeneous_color_base<Element, Layout, 2></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> {</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keyword">using</span> layout_t = Layout;</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  homogeneous_color_base() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keyword">explicit</span> homogeneous_color_base(Element v) : v0_(v), v1_(v) {}</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  homogeneous_color_base(Element v0, Element v1) : v0_(v0), v1_(v1) {}</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  homogeneous_color_base(homogeneous_color_base<E2, L2, 2> <span class="keyword">const</span>& c)</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  : v0_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 0>::value>(c))</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  , v1_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 1>::value>(c))</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  {}</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="comment">// Support for l-value reference proxy copy construction</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2></div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  homogeneous_color_base(homogeneous_color_base<E2, L2, 2>& c)</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  : v0_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 0>::value>(c))</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  , v1_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 1>::value>(c))</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  {}</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="comment">// Support for planar_pixel_iterator construction and dereferencing</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> P></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  homogeneous_color_base(P* p, <span class="keywordtype">bool</span>)</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  : v0_(&semantic_at_c<0>(*p))</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  , v1_(&semantic_at_c<1>(*p))</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  {}</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> </div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="comment">// Support for planar_pixel_reference offset constructor</span></div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Ptr></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  homogeneous_color_base(Ptr <span class="keyword">const</span>& ptr, std::ptrdiff_t diff)</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  : v0_(*memunit_advanced(semantic_at_c<0>(ptr), diff))</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  , v1_(*memunit_advanced(semantic_at_c<1>(ptr), diff))</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  {}</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Ref></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  Ref deref()<span class="keyword"> const</span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">return</span> Ref(*semantic_at_c<0>(*<span class="keyword">this</span>), *semantic_at_c<1>(*<span class="keyword">this</span>));</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> </div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 0>)</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  { <span class="keywordflow">return</span> v0_; }</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> </div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 0>) <span class="keyword">const</span></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  { <span class="keywordflow">return</span> v0_; }</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> </div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 1>)</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  { <span class="keywordflow">return</span> v1_; }</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> </div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 1>) <span class="keyword">const</span></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  { <span class="keywordflow">return</span> v1_; }</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span> </div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="comment">// Support for planar_pixel_reference operator[]</span></div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  Element at_c_dynamic(std::size_t i)<span class="keyword"> const</span></div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">if</span> (i == 0)</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordflow">return</span> v0_;</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">return</span> v1_;</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  }</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  Element v0_{};</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  Element v1_{};</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> };</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout></div><div class="line"><a name="l00185"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1detail_1_1homogeneous__color__base_3_01_element_00_01_layout_00_013_01_4.html"> 185</a></span> <span class="keyword">struct </span>homogeneous_color_base<Element, Layout, 3></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> {</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keyword">using</span> layout_t = Layout;</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> </div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  homogeneous_color_base() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keyword">explicit</span> homogeneous_color_base(Element v) : v0_(v), v1_(v), v2_(v) {}</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  homogeneous_color_base(Element v0, Element v1, Element v2)</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  : v0_(v0), v1_(v1), v2_(v2)</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  {}</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span> </div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2></div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  homogeneous_color_base(homogeneous_color_base<E2, L2, 3> <span class="keyword">const</span>& c)</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  : v0_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 0>::value>(c))</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  , v1_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 1>::value>(c))</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  , v2_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 2>::value>(c))</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  {}</div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="comment">// Support for l-value reference proxy copy construction</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2></div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  homogeneous_color_base(homogeneous_color_base<E2, L2, 3>& c)</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  : v0_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 0>::value>(c))</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  , v1_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 1>::value>(c))</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  , v2_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 2>::value>(c))</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  {}</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> </div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="comment">// Support for planar_pixel_iterator construction and dereferencing</span></div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> P></div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  homogeneous_color_base(P* p, <span class="keywordtype">bool</span>)</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  : v0_(&semantic_at_c<0>(*p))</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  , v1_(&semantic_at_c<1>(*p))</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  , v2_(&semantic_at_c<2>(*p))</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  {}</div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span> </div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="comment">// Support for planar_pixel_reference offset constructor</span></div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Ptr></div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  homogeneous_color_base(Ptr <span class="keyword">const</span>& ptr, std::ptrdiff_t diff)</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  : v0_(*memunit_advanced(semantic_at_c<0>(ptr), diff))</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  , v1_(*memunit_advanced(semantic_at_c<1>(ptr), diff))</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  , v2_(*memunit_advanced(semantic_at_c<2>(ptr), diff))</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  {}</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span> </div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Ref></div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  Ref deref()<span class="keyword"> const</span></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">return</span> Ref(</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  *semantic_at_c<0>(*<span class="keyword">this</span>),</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  *semantic_at_c<1>(*<span class="keyword">this</span>),</div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  *semantic_at_c<2>(*<span class="keyword">this</span>));</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  }</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> </div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 0>)</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  { <span class="keywordflow">return</span> v0_; }</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span> </div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 0>) <span class="keyword">const</span></div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  { <span class="keywordflow">return</span> v0_; }</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span> </div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 1>)</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  { <span class="keywordflow">return</span> v1_; }</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span> </div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 1>) <span class="keyword">const</span></div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  { <span class="keywordflow">return</span> v1_; }</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> </div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 2>)</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  { <span class="keywordflow">return</span> v2_; }</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span> </div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 2>) <span class="keyword">const</span></div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  { <span class="keywordflow">return</span> v2_; }</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span> </div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="comment">// Support for planar_pixel_reference operator[]</span></div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  Element at_c_dynamic(std::size_t i)<span class="keyword"> const</span></div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="keywordflow">switch</span> (i)</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  {</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="keywordflow">case</span> 0: <span class="keywordflow">return</span> v0_;</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">case</span> 1: <span class="keywordflow">return</span> v1_;</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  }</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordflow">return</span> v2_;</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  }</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span> </div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  Element v0_{};</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  Element v1_{};</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  Element v2_{};</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span> };</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span> </div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout></div><div class="line"><a name="l00280"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1detail_1_1homogeneous__color__base_3_01_element_00_01_layout_00_014_01_4.html"> 280</a></span> <span class="keyword">struct </span>homogeneous_color_base<Element, Layout, 4></div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span> {</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keyword">using</span> layout_t = Layout;</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span> </div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  homogeneous_color_base() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keyword">explicit</span> homogeneous_color_base(Element v) : v0_(v), v1_(v), v2_(v), v3_(v) {}</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  homogeneous_color_base(Element v0, Element v1, Element v2, Element v3)</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  : v0_(v0), v1_(v1), v2_(v2), v3_(v3)</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  {}</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span> </div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2></div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  homogeneous_color_base(homogeneous_color_base<E2, L2, 4> <span class="keyword">const</span>& c)</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  : v0_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 0>::value>(c))</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  , v1_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 1>::value>(c))</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  , v2_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 2>::value>(c))</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  , v3_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 3>::value>(c))</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  {}</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span> </div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="comment">// Support for l-value reference proxy copy construction</span></div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2></div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  homogeneous_color_base(homogeneous_color_base<E2, L2, 4>& c)</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  : v0_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 0>::value>(c))</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  , v1_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 1>::value>(c))</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  , v2_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 2>::value>(c))</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  , v3_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 3>::value>(c))</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  {}</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span> </div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="comment">// Support for planar_pixel_iterator construction and dereferencing</span></div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> P></div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  homogeneous_color_base(P * p, <span class="keywordtype">bool</span>)</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  : v0_(&semantic_at_c<0>(*p))</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  , v1_(&semantic_at_c<1>(*p))</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  , v2_(&semantic_at_c<2>(*p))</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  , v3_(&semantic_at_c<3>(*p))</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  {}</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span> </div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="comment">// Support for planar_pixel_reference offset constructor</span></div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Ptr></div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  homogeneous_color_base(Ptr <span class="keyword">const</span>& ptr, std::ptrdiff_t diff)</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  : v0_(*memunit_advanced(semantic_at_c<0>(ptr), diff))</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  , v1_(*memunit_advanced(semantic_at_c<1>(ptr), diff))</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  , v2_(*memunit_advanced(semantic_at_c<2>(ptr), diff))</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  , v3_(*memunit_advanced(semantic_at_c<3>(ptr), diff))</div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  {}</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span> </div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Ref></div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  Ref deref()<span class="keyword"> const</span></div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keywordflow">return</span> Ref(</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  *semantic_at_c<0>(*<span class="keyword">this</span>),</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  *semantic_at_c<1>(*<span class="keyword">this</span>),</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  *semantic_at_c<2>(*<span class="keyword">this</span>),</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  *semantic_at_c<3>(*<span class="keyword">this</span>));</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  }</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span> </div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 0>)</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  { <span class="keywordflow">return</span> v0_; }</div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span> </div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 0>) <span class="keyword">const</span></div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  { <span class="keywordflow">return</span> v0_; }</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span> </div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 1>)</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  { <span class="keywordflow">return</span> v1_; }</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span> </div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 1>) <span class="keyword">const</span></div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  { <span class="keywordflow">return</span> v1_; }</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span> </div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 2>)</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  { <span class="keywordflow">return</span> v2_; }</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span> </div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 2>) <span class="keyword">const</span></div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  { <span class="keywordflow">return</span> v2_; }</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span> </div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 3>)</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  { <span class="keywordflow">return</span> v3_; }</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span> </div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 3>) <span class="keyword">const</span></div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  { <span class="keywordflow">return</span> v3_; }</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span> </div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <span class="comment">// Support for planar_pixel_reference operator[]</span></div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  Element at_c_dynamic(std::size_t i)<span class="keyword"> const</span></div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keywordflow">switch</span> (i)</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  {</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keywordflow">case</span> 0: <span class="keywordflow">return</span> v0_;</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="keywordflow">case</span> 1: <span class="keywordflow">return</span> v1_;</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keywordflow">case</span> 2: <span class="keywordflow">return</span> v2_;</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  }</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  <span class="keywordflow">return</span> v3_;</div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  }</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span> </div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  Element v0_{};</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  Element v1_{};</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  Element v2_{};</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  Element v3_{};</div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span> };</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span> </div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout></div><div class="line"><a name="l00390"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1detail_1_1homogeneous__color__base_3_01_element_00_01_layout_00_015_01_4.html"> 390</a></span> <span class="keyword">struct </span>homogeneous_color_base<Element, Layout, 5></div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span> {</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="keyword">using</span> layout_t = Layout;</div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span> </div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  homogeneous_color_base() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  <span class="keyword">explicit</span> homogeneous_color_base(Element v)</div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  : v0_(v), v1_(v), v2_(v), v3_(v), v4_(v)</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  {}</div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span> </div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  homogeneous_color_base(Element v0, Element v1, Element v2, Element v3, Element v4)</div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  : v0_(v0), v1_(v1), v2_(v2), v3_(v3), v4_(v4)</div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  {}</div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span> </div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2></div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  homogeneous_color_base(homogeneous_color_base<E2, L2, 5> <span class="keyword">const</span>& c)</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  : v0_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 0>::value>(c))</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  , v1_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 1>::value>(c))</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  , v2_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 2>::value>(c))</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  , v3_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 3>::value>(c))</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  , v4_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 4>::value>(c))</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  {}</div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span> </div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="comment">// Support for l-value reference proxy copy construction</span></div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> E2, <span class="keyword">typename</span> L2></div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  homogeneous_color_base(homogeneous_color_base<E2, L2, 5>& c)</div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  : v0_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 0>::value>(c))</div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  , v1_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 1>::value>(c))</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  , v2_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 2>::value>(c))</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  , v3_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 3>::value>(c))</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  , v4_(<a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">gil::at_c</a><mapping_transform<Layout, L2, 4>::value>(c))</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  {}</div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span> </div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <span class="comment">// Support for planar_pixel_iterator construction and dereferencing</span></div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> P></div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  homogeneous_color_base(P* p, <span class="keywordtype">bool</span>)</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  : v0_(&semantic_at_c<0>(*p))</div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  , v1_(&semantic_at_c<1>(*p))</div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  , v2_(&semantic_at_c<2>(*p))</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  , v3_(&semantic_at_c<3>(*p))</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  , v4_(&semantic_at_c<4>(*p))</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  {}</div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span> </div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="comment">// Support for planar_pixel_reference offset constructor</span></div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Ptr></div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  homogeneous_color_base(Ptr <span class="keyword">const</span>& ptr, std::ptrdiff_t diff)</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  : v0_(*memunit_advanced(semantic_at_c<0>(ptr), diff))</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  , v1_(*memunit_advanced(semantic_at_c<1>(ptr), diff))</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  , v2_(*memunit_advanced(semantic_at_c<2>(ptr), diff))</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  , v3_(*memunit_advanced(semantic_at_c<3>(ptr), diff))</div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  , v4_(*memunit_advanced(semantic_at_c<4>(ptr), diff))</div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  {}</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span> </div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span> </div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 0>)</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  { <span class="keywordflow">return</span> v0_; }</div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span> </div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 0>) <span class="keyword">const</span></div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  { <span class="keywordflow">return</span> v0_; }</div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span> </div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 1>)</div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  { <span class="keywordflow">return</span> v1_; }</div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span> </div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 1>) <span class="keyword">const</span></div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  { <span class="keywordflow">return</span> v1_; }</div><div class="line"><a name="l00458"></a><span class="lineno"> 458</span> </div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 2>)</div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  { <span class="keywordflow">return</span> v2_; }</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span> </div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 2>) <span class="keyword">const</span></div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  { <span class="keywordflow">return</span> v2_; }</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span> </div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 3>)</div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  { <span class="keywordflow">return</span> v3_; }</div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span> </div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 3>) <span class="keyword">const</span></div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  { <span class="keywordflow">return</span> v3_; }</div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span> </div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 4>)</div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  { <span class="keywordflow">return</span> v4_; }</div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span> </div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  <span class="keyword">auto</span> at(std::integral_constant<int, 4>) <span class="keyword">const</span></div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type<homogeneous_color_base>::type</a></div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  { <span class="keywordflow">return</span> v4_; }</div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span> </div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Ref></div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  Ref deref()<span class="keyword"> const</span></div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  <span class="keywordflow">return</span> Ref(</div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  *semantic_at_c<0>(*<span class="keyword">this</span>),</div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  *semantic_at_c<1>(*<span class="keyword">this</span>),</div><div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  *semantic_at_c<2>(*<span class="keyword">this</span>),</div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  *semantic_at_c<3>(*<span class="keyword">this</span>),</div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  *semantic_at_c<4>(*<span class="keyword">this</span>));</div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  }</div><div class="line"><a name="l00493"></a><span class="lineno"> 493</span> </div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  <span class="comment">// Support for planar_pixel_reference operator[]</span></div><div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  Element at_c_dynamic(std::size_t i)<span class="keyword"> const</span></div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  <span class="keywordflow">switch</span> (i)</div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  {</div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  <span class="keywordflow">case</span> 0: <span class="keywordflow">return</span> v0_;</div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  <span class="keywordflow">case</span> 1: <span class="keywordflow">return</span> v1_;</div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keywordflow">case</span> 2: <span class="keywordflow">return</span> v2_;</div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <span class="keywordflow">case</span> 3: <span class="keywordflow">return</span> v3_;</div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  }</div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  <span class="keywordflow">return</span> v4_;</div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  }</div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span> </div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  Element v0_{};</div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  Element v1_{};</div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  Element v2_{};</div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  Element v3_{};</div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  Element v4_{};</div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span> };</div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span> </div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span> <span class="preprocessor">#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)</span></div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span> <span class="preprocessor">#pragma warning(pop)</span></div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span> </div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span> <span class="comment">// The following way of casting adjacent channels (the contents of color_base) into an array appears to be unsafe</span></div><div class="line"><a name="l00520"></a><span class="lineno"> 520</span> <span class="comment">// -- there is no guarantee that the compiler won't add any padding between adjacent channels.</span></div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span> <span class="comment">// Note, however, that GIL _must_ be compiled with compiler settings ensuring there is no padding in the color base structs.</span></div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span> <span class="comment">// This is because the color base structs must model the interleaved organization in memory. In other words, the client may</span></div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span> <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></div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span> <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></div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span> <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></div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span> <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></div><div class="line"><a name="l00527"></a><span class="lineno"> 527</span> <span class="comment">// However, the client must nevertheless ensure that proper compiler settings are used for their compiler and their channel types.</span></div><div class="line"><a name="l00528"></a><span class="lineno"> 528</span> </div><div class="line"><a name="l00529"></a><span class="lineno"> 529</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K></div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span> <span class="keyword">auto</span> dynamic_at_c(homogeneous_color_base<Element,Layout,K>& cb, std::size_t i)</div><div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__reference__type.html">element_reference_type<homogeneous_color_base<Element, Layout, K></a>>::type</div><div class="line"><a name="l00532"></a><span class="lineno"> 532</span> {</div><div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  BOOST_ASSERT(i < K);</div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  <span class="keywordflow">return</span> (gil_reinterpret_cast<Element*>(&cb))[i];</div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span> }</div><div class="line"><a name="l00536"></a><span class="lineno"> 536</span> </div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K></div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span> <span class="keyword">auto</span> dynamic_at_c(homogeneous_color_base<Element, Layout, K> <span class="keyword">const</span>& cb, std::size_t i)</div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  -> <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1element__const__reference__type.html">element_const_reference_type</a></div><div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <</div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  homogeneous_color_base<Element, Layout, K></div><div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  >::type</div><div class="line"><a name="l00543"></a><span class="lineno"> 543</span> {</div><div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  BOOST_ASSERT(i < K);</div><div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  <span class="keywordflow">return</span> (gil_reinterpret_cast_c<const Element*>(&cb))[i];</div><div class="line"><a name="l00546"></a><span class="lineno"> 546</span> }</div><div class="line"><a name="l00547"></a><span class="lineno"> 547</span> </div><div class="line"><a name="l00548"></a><span class="lineno"> 548</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K></div><div class="line"><a name="l00549"></a><span class="lineno"> 549</span> <span class="keyword">auto</span> dynamic_at_c(homogeneous_color_base<Element&, Layout, K> <span class="keyword">const</span>& cb, std::size_t i)</div><div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  -> <span class="keyword">typename</span> element_reference_type</div><div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  <</div><div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  homogeneous_color_base<Element&, Layout, K></div><div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  >::type</div><div class="line"><a name="l00554"></a><span class="lineno"> 554</span> {</div><div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  BOOST_ASSERT(i < K);</div><div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  <span class="keywordflow">return</span> cb.at_c_dynamic(i);</div><div class="line"><a name="l00557"></a><span class="lineno"> 557</span> }</div><div class="line"><a name="l00558"></a><span class="lineno"> 558</span> </div><div class="line"><a name="l00559"></a><span class="lineno"> 559</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Element, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K></div><div class="line"><a name="l00560"></a><span class="lineno"> 560</span> <span class="keyword">auto</span> dynamic_at_c(</div><div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  homogeneous_color_base<Element const&, Layout, K><span class="keyword">const</span>& cb, std::size_t i)</div><div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  -> <span class="keyword">typename</span> element_const_reference_type</div><div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  <</div><div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  homogeneous_color_base<Element const&, Layout, K></div><div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  >::type</div><div class="line"><a name="l00566"></a><span class="lineno"> 566</span> {</div><div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  BOOST_ASSERT(i < K);</div><div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  <span class="keywordflow">return</span> cb.at_c_dynamic(i);</div><div class="line"><a name="l00569"></a><span class="lineno"> 569</span> }</div><div class="line"><a name="l00570"></a><span class="lineno"> 570</span> </div><div class="line"><a name="l00571"></a><span class="lineno"> 571</span> } <span class="comment">// namespace detail</span></div><div class="line"><a name="l00572"></a><span class="lineno"> 572</span> </div><div class="line"><a name="l00573"></a><span class="lineno"> 573</span> <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></div><div class="line"><a name="l00574"></a><span class="lineno"> 574</span> <span class="keyword">struct </span>kth_element_type<detail::homogeneous_color_base<Element, Layout, K1>, K></div><div class="line"><a name="l00575"></a><span class="lineno"> 575</span> {</div><div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  <span class="keyword">using</span> type = Element;</div><div class="line"><a name="l00577"></a><span class="lineno"> 577</span> };</div><div class="line"><a name="l00578"></a><span class="lineno"> 578</span> </div><div class="line"><a name="l00579"></a><span class="lineno"> 579</span> <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></div><div class="line"><a name="l00580"></a><span class="lineno"> 580</span> <span class="keyword">struct </span>kth_element_reference_type<detail::homogeneous_color_base<Element, Layout, K1>, K></div><div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  : std::add_lvalue_reference<Element></div><div class="line"><a name="l00582"></a><span class="lineno"> 582</span> {};</div><div class="line"><a name="l00583"></a><span class="lineno"> 583</span> </div><div class="line"><a name="l00584"></a><span class="lineno"> 584</span> <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></div><div class="line"><a name="l00585"></a><span class="lineno"> 585</span> <span class="keyword">struct </span>kth_element_const_reference_type</div><div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  <</div><div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  detail::homogeneous_color_base<Element, Layout, K1>,</div><div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  K</div><div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  ></div><div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  : std::add_lvalue_reference<typename std::add_const<Element>::type></div><div class="line"><a name="l00591"></a><span class="lineno"> 591</span> {};</div><div class="line"><a name="l00592"></a><span class="lineno"> 592</span> </div><div class="line"><a name="l00595"></a><span class="lineno"> 595</span> <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></div><div class="line"><a name="l00596"></a><span class="lineno"> 596</span> <span class="keyword">inline</span></div><div class="line"><a name="l00597"></a><span class="lineno"><a class="line" href="group___color_base_model_homogeneous.html#gae2eaf5eecbad94d7dc6432b8f759fba0"> 597</a></span> <span class="keyword">auto</span> <a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">at_c</a>(detail::homogeneous_color_base<E, L, N>& p)</div><div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  -> <span class="keyword">typename</span> std::add_lvalue_reference<E>::type</div><div class="line"><a name="l00599"></a><span class="lineno"> 599</span> {</div><div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  <span class="keywordflow">return</span> p.at(std::integral_constant<int, K>());</div><div class="line"><a name="l00601"></a><span class="lineno"> 601</span> }</div><div class="line"><a name="l00602"></a><span class="lineno"> 602</span> </div><div class="line"><a name="l00605"></a><span class="lineno"> 605</span> <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></div><div class="line"><a name="l00606"></a><span class="lineno"> 606</span> <span class="keyword">inline</span></div><div class="line"><a name="l00607"></a><span class="lineno"><a class="line" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62"> 607</a></span> <span class="keyword">auto</span> <a class="code" href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">at_c</a>(<span class="keyword">const</span> detail::homogeneous_color_base<E, L, N>& p)</div><div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  -> <span class="keyword">typename</span> std::add_lvalue_reference<typename std::add_const<E>::type>::type</div><div class="line"><a name="l00609"></a><span class="lineno"> 609</span> {</div><div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  <span class="keywordflow">return</span> p.at(std::integral_constant<int, K>());</div><div class="line"><a name="l00611"></a><span class="lineno"> 611</span> }</div><div class="line"><a name="l00612"></a><span class="lineno"> 612</span> </div><div class="line"><a name="l00613"></a><span class="lineno"> 613</span> <span class="keyword">namespace </span>detail</div><div class="line"><a name="l00614"></a><span class="lineno"> 614</span> {</div><div class="line"><a name="l00615"></a><span class="lineno"> 615</span> </div><div class="line"><a name="l00616"></a><span class="lineno"> 616</span> <span class="keyword">struct </span>swap_fn</div><div class="line"><a name="l00617"></a><span class="lineno"> 617</span> {</div><div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  <span class="keywordtype">void</span> operator()(T& x, T& y)<span class="keyword"> const</span></div><div class="line"><a name="l00620"></a><span class="lineno"> 620</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <span class="keyword">using</span> <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">std::swap</a>;</div><div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(x, y);</div><div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  }</div><div class="line"><a name="l00624"></a><span class="lineno"> 624</span> };</div><div class="line"><a name="l00625"></a><span class="lineno"> 625</span> </div><div class="line"><a name="l00626"></a><span class="lineno"> 626</span> } <span class="comment">// namespace detail</span></div><div class="line"><a name="l00627"></a><span class="lineno"> 627</span> </div><div class="line"><a name="l00628"></a><span class="lineno"> 628</span> <span class="keyword">template</span> <<span class="keyword">typename</span> E, <span class="keyword">typename</span> L, <span class="keywordtype">int</span> N></div><div class="line"><a name="l00629"></a><span class="lineno"> 629</span> <span class="keyword">inline</span></div><div class="line"><a name="l00630"></a><span class="lineno"> 630</span> <span class="keywordtype">void</span> <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(</div><div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  detail::homogeneous_color_base<E, L, N>& x,</div><div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  detail::homogeneous_color_base<E, L, N>& y)</div><div class="line"><a name="l00633"></a><span class="lineno"> 633</span> {</div><div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  static_for_each(x, y, detail::swap_fn());</div><div class="line"><a name="l00635"></a><span class="lineno"> 635</span> }</div><div class="line"><a name="l00636"></a><span class="lineno"> 636</span> </div><div class="line"><a name="l00637"></a><span class="lineno"> 637</span> }} <span class="comment">// namespace boost::gil</span></div><div class="line"><a name="l00638"></a><span class="lineno"> 638</span> </div><div class="line"><a name="l00639"></a><span class="lineno"> 639</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="group___color_base_model_homogeneous_html_gaa6cde48827fe3e9997683c68cad7ac62"><div class="ttname"><a href="group___color_base_model_homogeneous.html#gaa6cde48827fe3e9997683c68cad7ac62">boost::gil::at_c</a></div><div class="ttdeci">auto at_c(const detail::homogeneous_color_base< E, L, N > &p) -> typename std::add_lvalue_reference< typename std::add_const< E >::type >::type</div><div class="ttdoc">Provides constant access to the K-th element, in physical order.</div><div class="ttdef"><b>Definition:</b> color_base.hpp:607</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1element__const__reference__type_html"><div class="ttname"><a href="structboost_1_1gil_1_1element__const__reference__type.html">boost::gil::element_const_reference_type</a></div><div class="ttdoc">Specifies the return type of the constant element accessor at_c of a homogeneous color base.</div><div class="ttdef"><b>Definition:</b> color_base.hpp:41</div></div>
- <div class="ttc" id="group___color_base_algorithm_semantic_at_c_html_ga5aa277c761861eb6c540da0ba2e22d4e"><div class="ttname"><a href="group___color_base_algorithm_semantic_at_c.html#ga5aa277c761861eb6c540da0ba2e22d4e">boost::gil::semantic_at_c</a></div><div class="ttdeci">kth_semantic_element_const_reference_type< ColorBase, K >::type semantic_at_c(const ColorBase &p)</div><div class="ttdoc">A constant accessor to the K-th semantic element of a color base.</div><div class="ttdef"><b>Definition:</b> color_base_algorithm.hpp:133</div></div>
- <div class="ttc" id="structboost_1_1gil_1_1element__reference__type_html"><div class="ttname"><a href="structboost_1_1gil_1_1element__reference__type.html">boost::gil::element_reference_type</a></div><div class="ttdoc">Specifies the return type of the mutable element accessor at_c of a homogeneous color base.</div><div class="ttdef"><b>Definition:</b> color_base.hpp:40</div></div>
- <div class="ttc" id="group___packed_channel_reference_model_html_ga70de3c85964650c16afcc42c02bd5df9"><div class="ttname"><a href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">std::swap</a></div><div class="ttdeci">void swap(boost::gil::packed_channel_reference< BF, FB, NB, M > const x, R &y)</div><div class="ttdoc">swap for packed_channel_reference</div><div class="ttdef"><b>Definition:</b> channel.hpp:529</div></div>
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