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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_PIXEL_HPP</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#define BOOST_GIL_PIXEL_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/channel.hpp></span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <boost/gil/color_base.hpp></span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include <boost/gil/color_base_algorithm.hpp></span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <boost/gil/concepts.hpp></span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <boost/gil/metafunctions.hpp></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <boost/gil/utilities.hpp></span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <boost/gil/detail/mp11.hpp></span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <functional></span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <type_traits></span></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="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">// Forward-declare gray_t</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">struct </span>gray_color_t;</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">using</span> gray_t = mp11::mp_list<gray_color_t>;</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">template</span> <<span class="keyword">typename</span> PixelBased> <span class="keyword">struct </span>color_space_type;</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">template</span> <<span class="keyword">typename</span> PixelBased> <span class="keyword">struct </span>channel_mapping_type;</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">template</span> <<span class="keyword">typename</span> PixelBased> <span class="keyword">struct </span>channel_type;</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="keyword">template</span> <<span class="keyword">typename</span> PixelBased> <span class="keyword">struct </span>is_planar;</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">template</span> <<span class="keyword">typename</span> PixelBased></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">struct </span>color_space_type<PixelBased const> : color_space_type<PixelBased> {};</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="keyword">typename</span> PixelBased></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">struct </span>channel_mapping_type<PixelBased const> : channel_mapping_type<PixelBased> {};</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="keyword">template</span> <<span class="keyword">typename</span> PixelBased></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="keyword">struct </span>channel_type<PixelBased const> : channel_type<PixelBased> {};</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="keyword">template</span> <<span class="keyword">typename</span> PixelBased></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="keyword">struct </span>is_planar : std::false_type {};</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="keyword">template</span> <<span class="keyword">typename</span> PixelBased></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="keyword">struct </span>is_planar<PixelBased const> : is_planar<PixelBased> {};</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T> <span class="keyword">struct </span>is_pixel : std::false_type {};</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T> <span class="keyword">struct </span>is_pixel<T const> : is_pixel<T> {};</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="keyword">template</span> <<span class="keyword">typename</span> PixelBased></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="keyword">struct </span>num_channels : mp11::mp_size<typename color_space_type<PixelBased>::type>::type {};</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="keyword">template</span> <<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="keyword">struct </span>pixel :</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  detail::homogeneous_color_base</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>  ChannelValue,</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  Layout,</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  mp11::mp_size<typename Layout::color_space_t>::value</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  ></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> {</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keyword">using</span> channel_t = ChannelValue;</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">using</span> parent_t = detail::homogeneous_color_base</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  ChannelValue,</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  Layout,</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  mp11::mp_size<typename Layout::color_space_t>::value</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  >;</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keyword">using</span> value_type = pixel<ChannelValue, Layout>;</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keyword">using</span> reference = value_type&;</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keyword">using</span> const_reference = value_type <span class="keyword">const</span>&;</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> is_mutable = channel_traits<channel_t>::is_mutable;</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  pixel() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">explicit</span> pixel(channel_t v) : parent_t(v) {} <span class="comment">// sets all channels to v</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  pixel(channel_t v0, channel_t v1) : parent_t(v0, v1) {}</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  pixel(channel_t v0, channel_t v1, channel_t v2) : parent_t(v0, v1, v2) {}</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  pixel(channel_t v0, channel_t v1, channel_t v2, channel_t v3)</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  : parent_t(v0, v1, v2, v3)</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  {}</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>  pixel(channel_t v0, channel_t v1, channel_t v2, channel_t v3, channel_t v4)</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  : parent_t(v0, v1, v2, v3, v4)</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  {}</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  pixel(channel_t v0, channel_t v1, channel_t v2, channel_t v3, channel_t v4, channel_t v5)</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  : parent_t(v0, v1, v2, v3, v4, v5)</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>  pixel(<span class="keyword">const</span> pixel& p) : parent_t(p) {}</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  pixel& operator=(pixel <span class="keyword">const</span>& p)</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  {</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  static_copy(p,*<span class="keyword">this</span>);</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">return</span> *<span class="keyword">this</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> </div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="comment">// Construct from another compatible pixel type</span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  pixel(Pixel <span class="keyword">const</span>& p,</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keyword">typename</span> std::enable_if<is_pixel<Pixel>::value>::type* <span class="comment">/*dummy*/</span> = <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  : parent_t(p)</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  {</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  check_compatible<Pixel>();</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  }</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">template</span> <<span class="keyword">typename</span> Pixel></div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  pixel& operator=(Pixel <span class="keyword">const</span>& p)</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  {</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  assign(p, is_pixel<Pixel>());</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  }</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> </div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel></div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordtype">bool</span> operator==(Pixel <span class="keyword">const</span>& p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> equal(p, is_pixel<Pixel>()); }</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span> </div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel></div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordtype">bool</span> operator!=(Pixel <span class="keyword">const</span>& p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> !(*<span class="keyword">this</span> == p); }</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span> </div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="comment">// homogeneous pixels have operator[]</span></div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="keyword">auto</span> operator[](std::size_t index)</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  -> <span class="keyword">typename</span> channel_traits<channel_t>::reference</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  {</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">return</span> dynamic_at_c(*<span class="keyword">this</span>, index);</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  }</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>  <span class="keyword">auto</span> operator[](std::size_t index) <span class="keyword">const</span></div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  -> <span class="keyword">typename</span> channel_traits<channel_t>::const_reference</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  {</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">return</span> dynamic_at_c(*<span class="keyword">this</span>, index);</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="l00181"></a><span class="lineno"> 181</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel></div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordtype">void</span> assign(Pixel <span class="keyword">const</span>& p, std::true_type)</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  {</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  check_compatible<Pixel>();</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  static_copy(p, *<span class="keyword">this</span>);</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  }</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>  <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel></div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordtype">bool</span> equal(Pixel <span class="keyword">const</span>& p, std::true_type)<span class="keyword"> const</span></div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  check_compatible<Pixel>();</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keywordflow">return</span> static_equal(*<span class="keyword">this</span>, p);</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> </div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel></div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordtype">void</span> check_compatible()<span class="keyword"> const</span></div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  gil_function_requires<PixelsCompatibleConcept<Pixel, pixel>>();</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 assignment/equality comparison of a channel with a grayscale pixel</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keyword">static</span> <span class="keywordtype">void</span> check_gray()</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  {</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  static_assert(std::is_same<typename Layout::color_space_t, gray_t>::value, <span class="stringliteral">""</span>);</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="keyword">template</span> <<span class="keyword">typename</span> Channel></div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordtype">void</span> assign(Channel <span class="keyword">const</span>& channel, std::false_type)</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  {</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  check_gray();</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  gil::at_c<0>(*<span class="keyword">this</span>) = channel;</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  }</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>  <span class="keyword">template</span> <<span class="keyword">typename</span> Channel></div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordtype">bool</span> equal (Channel <span class="keyword">const</span>& channel, std::false_type)<span class="keyword"> const</span></div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  check_gray();</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">return</span> gil::at_c<0>(*<span class="keyword">this</span>) == channel;</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  }</div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> </div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  pixel& operator= (channel_t channel)</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  {</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  check_gray();</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  gil::at_c<0>(*<span class="keyword">this</span>) = channel;</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  }</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> </div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keywordtype">bool</span> operator==(channel_t channel)<span class="keyword"> const</span></div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  check_gray();</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordflow">return</span> gil::at_c<0>(*<span class="keyword">this</span>) == channel;</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  }</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> };</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span> </div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="comment">// ColorBasedConcept</span></div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="comment"></span></div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <span class="keyword">template</span> <<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K></div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="keyword">struct </span>kth_element_type<pixel<ChannelValue,Layout>, K></div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> {</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keyword">using</span> type = ChannelValue;</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span> };</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> </div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <span class="keyword">template</span> <<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K></div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="keyword">struct </span>kth_element_reference_type<pixel<ChannelValue,Layout>, K></div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span> {</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <span class="keyword">using</span> type = <span class="keyword">typename</span> channel_traits<ChannelValue>::reference;</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> };</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">template</span> <<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K></div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="keyword">struct </span>kth_element_reference_type<const pixel<ChannelValue,Layout>, K></div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span> {</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keyword">using</span> type = <span class="keyword">typename</span> channel_traits<ChannelValue>::const_reference;</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span> };</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span> </div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="keyword">template</span> <<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout, <span class="keywordtype">int</span> K></div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span> <span class="keyword">struct </span>kth_element_const_reference_type<pixel<ChannelValue,Layout>, K></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="keyword">using</span> type = <span class="keyword">typename</span> channel_traits<ChannelValue>::const_reference;</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> };</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span> </div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="comment">// PixelConcept</span></div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="comment"></span></div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="keyword">template</span> <<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout></div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="keyword">struct </span>is_pixel<pixel<ChannelValue,Layout>> : std::true_type {};</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span> </div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span> <span class="comment">// HomogeneousPixelBasedConcept</span></div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span> <span class="comment"></span></div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span> <span class="keyword">template</span> <<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout></div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span> <span class="keyword">struct </span>color_space_type<pixel<ChannelValue, Layout>></div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span> {</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keyword">using</span> type = <span class="keyword">typename</span> Layout::color_space_t;</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span> };</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> <span class="keyword">template</span> <<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout></div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="keyword">struct </span>channel_mapping_type<pixel<ChannelValue, Layout>></div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span> {</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keyword">using</span> type = <span class="keyword">typename</span> Layout::channel_mapping_t;</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> ChannelValue, <span class="keyword">typename</span> Layout></div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="keyword">struct </span>is_planar<pixel<ChannelValue, Layout>> : std::false_type {};</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span> </div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="keyword">template</span> <<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> Layout></div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="keyword">struct </span>channel_type<pixel<ChannelValue, Layout>></div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span> {</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keyword">using</span> type = ChannelValue;</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> </div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span> }} <span class="comment">// namespace boost::gil</span></div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span> </div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span> <span class="preprocessor">#endif</span></div></div><!-- fragment --></div><!-- contents -->
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