50 <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">//</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// Distributed under the Boost Software License, Version 1.0</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// See accompanying file LICENSE_1_0.txt or copy at</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// http://www.boost.org/LICENSE_1_0.txt</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">//</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#ifndef BOOST_GIL_CHANNEL_HPP</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#define BOOST_GIL_CHANNEL_HPP</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include <boost/gil/utilities.hpp></span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <boost/assert.hpp></span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include <boost/config.hpp></span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <boost/config/pragma_message.hpp></span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <boost/integer/integer_mask.hpp></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <cstdint></span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <limits></span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <type_traits></span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#ifdef BOOST_GIL_DOXYGEN_ONLY</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#define BOOST_GIL_CONFIG_HAS_UNALIGNED_ACCESS</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#endif</span></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="preprocessor">#ifdef BOOST_GIL_CONFIG_HAS_UNALIGNED_ACCESS</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#if defined(sun) || defined(__sun) || \ // SunOS</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  defined(__osf__) || defined(__osf) || \ <span class="comment">// Tru64</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  defined(_hpux) || defined(hpux) || \ <span class="comment">// HP-UX</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  defined(__arm__) || defined(__ARM_ARCH) || \ <span class="comment">// ARM</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  defined(_AIX) <span class="comment">// AIX</span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#error Unaligned access strictly disabled for some UNIX platforms or ARM architecture</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#elif defined(__i386__) || defined(__x86_64__) || defined(__vax__)</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="comment">// The check for little-endian architectures that tolerate unaligned memory</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="comment">// accesses is just an optimization. Nothing will break if it fails to detect</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="comment">// a suitable architecture.</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="comment">//</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment">// Unfortunately, this optimization may be a C/C++ strict aliasing rules violation</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="comment">// if accessed data buffer has effective type that cannot be aliased</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">// without leading to undefined behaviour.</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> BOOST_PRAGMA_MESSAGE(<span class="stringliteral">"CAUTION: Unaligned access tolerated on little-endian may cause undefined behaviour"</span>)</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#error Unaligned access disabled for unknown platforms and architectures</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#endif // defined(BOOST_GIL_CONFIG_HAS_UNALIGNED_ACCESS)</span></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> <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="keyword">namespace </span>detail {</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T, <span class="keywordtype">bool</span> IsClass></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="keyword">struct </span>channel_traits_impl;</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment">// channel traits for custom class</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">struct </span>channel_traits_impl<T, true></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> value_type = <span class="keyword">typename</span> T::value_type;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">using</span> reference = <span class="keyword">typename</span> T::reference;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keyword">using</span> pointer = <span class="keyword">typename</span> T::pointer;</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keyword">using</span> const_reference = <span class="keyword">typename</span> T::const_reference;</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">using</span> const_pointer = <span class="keyword">typename</span> T::const_pointer;</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> is_mutable = T::is_mutable;</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keyword">static</span> value_type min_value() { <span class="keywordflow">return</span> T::min_value(); }</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keyword">static</span> value_type max_value() { <span class="keywordflow">return</span> T::max_value(); }</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="comment">// channel traits implementation for built-in integral or floating point channel type</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="keyword">struct </span>channel_traits_impl<T, false></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">using</span> value_type = T;</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">using</span> reference = T&;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keyword">using</span> pointer = T*;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keyword">using</span> const_reference = T <span class="keyword">const</span>&;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">using</span> const_pointer = T <span class="keyword">const</span>*;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> is_mutable = <span class="keyword">true</span>;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keyword">static</span> value_type min_value() { <span class="keywordflow">return</span> (std::numeric_limits<T>::min)(); }</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keyword">static</span> value_type max_value() { <span class="keywordflow">return</span> (std::numeric_limits<T>::max)(); }</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> };</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment">// channel traits implementation for constant built-in scalar or floating point type</span></div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="keyword">struct </span>channel_traits_impl<T const, false> : channel_traits_impl<T, false></div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> {</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keyword">using</span> reference = T <span class="keyword">const</span>&;</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keyword">using</span> pointer = T <span class="keyword">const</span>*;</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> is_mutable = <span class="keyword">false</span>;</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> </div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> } <span class="comment">// namespace detail</span></div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="keyword">struct </span>channel_traits : detail::channel_traits_impl<T, std::is_class<T>::value> {};</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment">// Channel traits for C++ reference type - remove the reference</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="keyword">struct </span>channel_traits<T&> : channel_traits<T> {};</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> <span class="comment">// Channel traits for constant C++ reference type</span></div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="keyword">struct </span>channel_traits<T const&> : channel_traits<T></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>  <span class="keyword">using</span> reference = <span class="keyword">typename</span> channel_traits<T>::const_reference;</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keyword">using</span> pointer = <span class="keyword">typename</span> channel_traits<T>::const_pointer;</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> is_mutable = <span class="keyword">false</span>;</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> };</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> </div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="keyword">template</span> <<span class="keyword">typename</span> BaseChannelValue, <span class="keyword">typename</span> MinVal, <span class="keyword">typename</span> MaxVal></div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="keyword">struct </span>scoped_channel_value</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> {</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keyword">using</span> value_type = scoped_channel_value<BaseChannelValue, MinVal, MaxVal>;</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keyword">using</span> reference = value_type&;</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keyword">using</span> pointer = value_type*;</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keyword">using</span> const_reference = value_type <span class="keyword">const</span>&;</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keyword">using</span> const_pointer = value_type <span class="keyword">const</span>*;</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keyword">static</span> constexpr <span class="keywordtype">bool</span> is_mutable = channel_traits<BaseChannelValue>::is_mutable;</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> </div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keyword">using</span> base_channel_t = BaseChannelValue;</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>  <span class="keyword">static</span> value_type min_value() { <span class="keywordflow">return</span> MinVal::apply(); }</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keyword">static</span> value_type max_value() { <span class="keywordflow">return</span> MaxVal::apply(); }</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> </div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  scoped_channel_value() = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  scoped_channel_value(scoped_channel_value <span class="keyword">const</span>& other) : value_(other.value_) {}</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  scoped_channel_value& operator=(scoped_channel_value <span class="keyword">const</span>& other) = <span class="keywordflow">default</span>;</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  scoped_channel_value(BaseChannelValue value) : value_(value) {}</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  scoped_channel_value& operator=(BaseChannelValue value)</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  {</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  value_ = value;</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  }</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>  scoped_channel_value& operator++() { ++value_; <span class="keywordflow">return</span> *<span class="keyword">this</span>; }</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  scoped_channel_value& operator--() { --value_; <span class="keywordflow">return</span> *<span class="keyword">this</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>  scoped_channel_value operator++(<span class="keywordtype">int</span>) { scoped_channel_value tmp=*<span class="keyword">this</span>; this->operator++(); <span class="keywordflow">return</span> tmp; }</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  scoped_channel_value operator--(<span class="keywordtype">int</span>) { scoped_channel_value tmp=*<span class="keyword">this</span>; this->operator--(); <span class="keywordflow">return</span> tmp; }</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>  <span class="keyword">template</span> <<span class="keyword">typename</span> Scalar2> scoped_channel_value& operator+=(Scalar2 v) { value_+=v; <span class="keywordflow">return</span> *<span class="keyword">this</span>; }</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Scalar2> scoped_channel_value& operator-=(Scalar2 v) { value_-=v; <span class="keywordflow">return</span> *<span class="keyword">this</span>; }</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Scalar2> scoped_channel_value& operator*=(Scalar2 v) { value_*=v; <span class="keywordflow">return</span> *<span class="keyword">this</span>; }</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Scalar2> scoped_channel_value& operator/=(Scalar2 v) { value_/=v; <span class="keywordflow">return</span> *<span class="keyword">this</span>; }</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span> </div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keyword">operator</span> BaseChannelValue()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> value_; }</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  BaseChannelValue value_{};</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> T></div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="keyword">struct </span>float_point_zero</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span> {</div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keyword">static</span> constexpr T apply() { <span class="keywordflow">return</span> 0.0f; }</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> };</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> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="keyword">struct </span>float_point_one</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">static</span> constexpr T apply() { <span class="keywordflow">return</span> 1.0f; }</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span> };</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> </div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span> </div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment">// It is necessary for packed channels to have their own value type. They cannot simply use an integral large enough to store the data. Here is why:</span></div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment">// - Any operation that requires returning the result by value will otherwise return the built-in integral type, which will have incorrect range</span></div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment">// That means that after getting the value of the channel we cannot properly do channel_convert, channel_invert, etc.</span></div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment">// - Two channels are declared compatible if they have the same value type. That means that a packed channel is incorrectly declared compatible with an integral type</span></div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="keyword">namespace </span>detail {</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="comment">// returns the smallest fast unsigned integral type that has at least NumBits bits</span></div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> NumBits></div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="keyword">struct </span>min_fast_uint :</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  std::conditional</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  NumBits <= 8,</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  std::uint_least8_t,</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  typename std::conditional</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>  NumBits <= 16,</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  std::uint_least16_t,</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  typename std::conditional</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>  NumBits <= 32,</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  std::uint_least32_t,</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  std::uintmax_t</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  >::type</div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  >::type</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> {};</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> template <int NumBits></div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span> struct num_value_fn</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  : std::conditional<NumBits < 32, std::uint32_t, std::uint64_t></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> </div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> template <int NumBits></div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span> struct max_value_fn</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  : std::conditional<NumBits <= 32, std::uint32_t, std::uint64_t></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="comment">// namespace detail</span></div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> </div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span> </div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span> template <int NumBits></div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span> class packed_channel_value</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span> {</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span> public:</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  using integer_t = typename detail::min_fast_uint<NumBits>::type;</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span> </div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  using value_type = packed_channel_value<NumBits>;</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  using reference = value_type&;</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  using const_reference = value_type const&;</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  using pointer = value_type*;</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  using const_pointer = value_type const*;</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  static constexpr bool is_mutable = true;</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>  static value_type min_value() { return 0; }</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  static value_type max_value() { return low_bits_mask_t< NumBits >::sig_bits; }</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span> </div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  packed_channel_value() = default;</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  packed_channel_value(integer_t v)</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>  value_ = static_cast<integer_t>(v & low_bits_mask_t<NumBits>::sig_bits_fast);</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  }</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span> </div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  template <typename Scalar></div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  packed_channel_value(Scalar v)</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  {</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  value_ = packed_channel_value(static_cast<integer_t>(v));</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>  static unsigned int num_bits() { return NumBits; }</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span> </div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  operator integer_t() const { return value_; }</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span> </div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span> private:</div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  integer_t value_{};</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span> };</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> namespace detail {</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span> </div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span> template <std::size_t K></div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span> struct static_copy_bytes</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span> {</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  void operator()(unsigned char const* from, unsigned char* to) const</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  {</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  *to = *from;</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  static_copy_bytes<K - 1>()(++from, ++to);</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> </div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span> template <></div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span> struct static_copy_bytes<0></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>  void operator()(unsigned char const*, unsigned char*) const {}</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span> };</div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span> </div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span> template <typename Derived, typename BitField, int NumBits, bool IsMutable></div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span> class packed_channel_reference_base</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span> {</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span> protected:</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  using data_ptr_t = typename std::conditional<IsMutable, void*, void const*>::type;</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span> public:</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  data_ptr_t _data_ptr; <span class="comment">// void* pointer to the first byte of the bit range</span></div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span> </div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  using value_type = packed_channel_value<NumBits>;</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  using reference = const Derived;</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  using pointer = value_type *;</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  using const_pointer = const value_type *;</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  static constexpr int num_bits = NumBits;</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  static constexpr bool is_mutable = IsMutable;</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span> </div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  static value_type min_value() { return channel_traits<value_type>::min_value(); }</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  static value_type max_value() { return channel_traits<value_type>::max_value(); }</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span> </div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  using bitfield_t = BitField;</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  using integer_t = typename value_type::integer_t;</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>  packed_channel_reference_base(data_ptr_t data_ptr) : _data_ptr(data_ptr) {}</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  packed_channel_reference_base(const packed_channel_reference_base& ref) : _data_ptr(ref._data_ptr) {}</div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  const Derived& operator=(integer_t v) const { set(v); return derived(); }</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>  const Derived& operator++() const { set(get()+1); return derived(); }</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  const Derived& operator--() const { set(get()-1); return derived(); }</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span> </div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  Derived operator++(int) const { Derived tmp=derived(); this->operator++(); return tmp; }</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  Derived operator--(int) const { Derived tmp=derived(); this->operator--(); return tmp; }</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span> </div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  template <typename Scalar2> const Derived& operator+=(Scalar2 v) const { set( static_cast<integer_t>( get() + v )); return derived(); }</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  template <typename Scalar2> const Derived& operator-=(Scalar2 v) const { set( static_cast<integer_t>( get() - v )); return derived(); }</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  template <typename Scalar2> const Derived& operator*=(Scalar2 v) const { set( static_cast<integer_t>( get() * v )); return derived(); }</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  template <typename Scalar2> const Derived& operator/=(Scalar2 v) const { set( static_cast<integer_t>( get() / v )); return derived(); }</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>  operator integer_t() const { return get(); }</div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  data_ptr_t operator &() const {return _data_ptr;}</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span> protected:</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span> </div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  using num_value_t = typename detail::num_value_fn<NumBits>::type;</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  using max_value_t = typename detail::max_value_fn<NumBits>::type;</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>  static const num_value_t num_values = static_cast< num_value_t >( 1 ) << NumBits ;</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  static const max_value_t max_val = static_cast< max_value_t >( num_values - 1 );</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span> </div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span> #if defined(BOOST_GIL_CONFIG_HAS_UNALIGNED_ACCESS)</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  const bitfield_t& get_data() const { return *static_cast<const bitfield_t*>(_data_ptr); }</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  void set_data(const bitfield_t& val) const { *static_cast< bitfield_t*>(_data_ptr) = val; }</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span> #else</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  bitfield_t get_data() const {</div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  bitfield_t ret;</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  static_copy_bytes<sizeof(bitfield_t) >()(gil_reinterpret_cast_c<const unsigned char*>(_data_ptr),gil_reinterpret_cast<unsigned char*>(&ret));</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  return ret;</div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  }</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  void set_data(const bitfield_t& val) const {</div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  static_copy_bytes<sizeof(bitfield_t) >()(gil_reinterpret_cast_c<const unsigned char*>(&val),gil_reinterpret_cast<unsigned char*>(_data_ptr));</div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  }</div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span> #endif</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> private:</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  void set(integer_t value) const { <span class="comment">// can this be done faster??</span></div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  this->derived().set_unsafe(((value % num_values) + num_values) % num_values);</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  }</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  integer_t get() const { return derived().get(); }</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  const Derived& derived() const { return static_cast<const Derived&>(*this); }</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span> };</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span> } <span class="comment">// namespace detail</span></div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span> </div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span> </div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span> template <typename BitField, int FirstBit, int NumBits, bool IsMutable></div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span> class packed_channel_reference;</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span> </div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span> template <typename BitField, int NumBits, bool IsMutable></div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span> class packed_dynamic_channel_reference;</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span> </div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span> template <typename BitField, int FirstBit, int NumBits></div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span> class packed_channel_reference<BitField, FirstBit, NumBits, false></div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  : public detail::packed_channel_reference_base</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>  packed_channel_reference<BitField, FirstBit, NumBits, false>,</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  BitField,</div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  NumBits,</div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  false</div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  ></div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span> {</div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  using parent_t = detail::packed_channel_reference_base</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>  packed_channel_reference<BitField, FirstBit, NumBits, false>,</div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  BitField,</div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  NumBits,</div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  false</div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  >;</div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span> </div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  friend class packed_channel_reference<BitField, FirstBit, NumBits, true>;</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>  static const BitField channel_mask = static_cast<BitField>(parent_t::max_val) << FirstBit;</div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span> </div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  void operator=(packed_channel_reference const&);</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span> public:</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  using const_reference = packed_channel_reference<BitField,FirstBit,NumBits,false> const;</div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  using mutable_reference = packed_channel_reference<BitField,FirstBit,NumBits,true> const;</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  using integer_t = typename parent_t::integer_t;</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>  explicit packed_channel_reference(const void* data_ptr) : parent_t(data_ptr) {}</div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  packed_channel_reference(const packed_channel_reference& ref) : parent_t(ref._data_ptr) {}</div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  packed_channel_reference(const mutable_reference& ref) : parent_t(ref._data_ptr) {}</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>  unsigned first_bit() const { return FirstBit; }</div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span> </div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  integer_t get() const { return integer_t((this->get_data()&channel_mask) >> FirstBit); }</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> </div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span> template <typename BitField, int FirstBit, int NumBits></div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span> class packed_channel_reference<BitField,FirstBit,NumBits,true></div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  : public detail::packed_channel_reference_base<packed_channel_reference<BitField,FirstBit,NumBits,true>,BitField,NumBits,true></div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span> {</div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  using parent_t = detail::packed_channel_reference_base<packed_channel_reference<BitField,FirstBit,NumBits,true>,BitField,NumBits,true>;</div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  friend class packed_channel_reference<BitField,FirstBit,NumBits,false>;</div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span> </div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  static const BitField channel_mask = static_cast< BitField >( parent_t::max_val ) << FirstBit;</div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span> </div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span> public:</div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  using const_reference = packed_channel_reference<BitField,FirstBit,NumBits,false> const;</div><div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  using mutable_reference = packed_channel_reference<BitField,FirstBit,NumBits,true> const;</div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  using integer_t = typename parent_t::integer_t;</div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span> </div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  explicit packed_channel_reference(void* data_ptr) : parent_t(data_ptr) {}</div><div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  packed_channel_reference(const packed_channel_reference& ref) : parent_t(ref._data_ptr) {}</div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span> </div><div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  packed_channel_reference const& operator=(integer_t value) const</div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  {</div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  BOOST_ASSERT(value <= parent_t::max_val);</div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span>  set_unsafe(value);</div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  return *this;</div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  }</div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span> </div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  const packed_channel_reference& operator=(const mutable_reference& ref) const { set_from_reference(ref.get_data()); return *this; }</div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  const packed_channel_reference& operator=(const const_reference& ref) const { set_from_reference(ref.get_data()); return *this; }</div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span> </div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  template <bool Mutable1></div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  const packed_channel_reference& operator=(const packed_dynamic_channel_reference<BitField,NumBits,Mutable1>& ref) const { set_unsafe(ref.get()); return *this; }</div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span> </div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  unsigned first_bit() const { return FirstBit; }</div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span> </div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  integer_t get() const { return integer_t((this->get_data()&channel_mask) >> FirstBit); }</div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  void set_unsafe(integer_t value) const { this->set_data((this->get_data() & ~channel_mask) | (( static_cast< BitField >( value )<<FirstBit))); }</div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span> private:</div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  void set_from_reference(const BitField& other_bits) const { this->set_data((this->get_data() & ~channel_mask) | (other_bits & channel_mask)); }</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> </div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span> }} <span class="comment">// namespace boost::gil</span></div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span> </div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span> namespace std {</div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span> <span class="comment">// We are forced to define swap inside std namespace because on some platforms (Visual Studio 8) STL calls swap qualified.</span></div><div class="line"><a name="l00520"></a><span class="lineno"> 520</span> <span class="comment">// swap with 'left bias':</span></div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span> <span class="comment">// - swap between proxy and anything</span></div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span> <span class="comment">// - swap between value type and proxy</span></div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span> <span class="comment">// - swap between proxy and proxy</span></div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span> </div><div class="line"><a name="l00527"></a><span class="lineno"> 527</span> template <typename BF, int FB, int NB, bool M, typename R></div><div class="line"><a name="l00528"></a><span class="lineno"> 528</span> inline</div><div class="line"><a name="l00529"></a><span class="lineno"><a class="line" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9"> 529</a></span> void swap(boost::gil::packed_channel_reference<BF, FB, NB, M> const x, R& y)</div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span> {</div><div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  boost::gil::swap_proxy</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>  typename boost::gil::packed_channel_reference<BF, FB, NB, M>::value_type</div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  >(x, y);</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> </div><div class="line"><a name="l00540"></a><span class="lineno"> 540</span> template <typename BF, int FB, int NB, bool M></div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span> inline</div><div class="line"><a name="l00542"></a><span class="lineno"><a class="line" href="group___packed_channel_reference_model.html#gaca47621e82bdf4e03cf6fee2e468a840"> 542</a></span> void swap(</div><div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  typename boost::gil::packed_channel_reference<BF, FB, NB, M>::value_type& x,</div><div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  boost::gil::packed_channel_reference<BF, FB, NB, M> const y)</div><div class="line"><a name="l00545"></a><span class="lineno"> 545</span> {</div><div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  boost::gil::swap_proxy</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>  typename boost::gil::packed_channel_reference<BF, FB, NB, M>::value_type</div><div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  >(x,y);</div><div class="line"><a name="l00550"></a><span class="lineno"> 550</span> }</div><div class="line"><a name="l00551"></a><span class="lineno"> 551</span> </div><div class="line"><a name="l00554"></a><span class="lineno"> 554</span> template <typename BF, int FB, int NB, bool M> inline</div><div class="line"><a name="l00555"></a><span class="lineno"><a class="line" href="group___packed_channel_reference_model.html#ga9f03e6f5254fdfc3848a9a9c1bba13cb"> 555</a></span> void swap(</div><div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  boost::gil::packed_channel_reference<BF, FB, NB, M> const x,</div><div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  boost::gil::packed_channel_reference<BF, FB, NB, M> const y)</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>  boost::gil::swap_proxy</div><div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  <</div><div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  typename boost::gil::packed_channel_reference<BF, FB, NB, M>::value_type</div><div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  >(x,y);</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> </div><div class="line"><a name="l00565"></a><span class="lineno"> 565</span> } <span class="comment">// namespace std</span></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> namespace boost { namespace gil {</div><div class="line"><a name="l00568"></a><span class="lineno"> 568</span> </div><div class="line"><a name="l00583"></a><span class="lineno"> 583</span> </div><div class="line"><a name="l00587"></a><span class="lineno"> 587</span> template <typename BitField, int NumBits></div><div class="line"><a name="l00588"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1packed__dynamic__channel__reference_3_01_bit_field_00_01_num_bits_00_01false_01_4.html"> 588</a></span> class packed_dynamic_channel_reference<BitField,NumBits,false></div><div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  : public detail::packed_channel_reference_base<packed_dynamic_channel_reference<BitField,NumBits,false>,BitField,NumBits,false></div><div class="line"><a name="l00590"></a><span class="lineno"> 590</span> {</div><div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  using parent_t = detail::packed_channel_reference_base<packed_dynamic_channel_reference<BitField,NumBits,false>,BitField,NumBits,false>;</div><div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  friend class packed_dynamic_channel_reference<BitField,NumBits,true>;</div><div class="line"><a name="l00593"></a><span class="lineno"> 593</span> </div><div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  unsigned _first_bit; <span class="comment">// 0..7</span></div><div class="line"><a name="l00595"></a><span class="lineno"> 595</span> </div><div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  void operator=(const packed_dynamic_channel_reference&);</div><div class="line"><a name="l00597"></a><span class="lineno"> 597</span> public:</div><div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  using const_reference = packed_dynamic_channel_reference<BitField,NumBits,false> const;</div><div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  using mutable_reference = packed_dynamic_channel_reference<BitField,NumBits,true> const;</div><div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  using integer_t = typename parent_t::integer_t;</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>  packed_dynamic_channel_reference(const void* data_ptr, unsigned first_bit) : parent_t(data_ptr), _first_bit(first_bit) {}</div><div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  packed_dynamic_channel_reference(const const_reference& ref) : parent_t(ref._data_ptr), _first_bit(ref._first_bit) {}</div><div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  packed_dynamic_channel_reference(const mutable_reference& ref) : parent_t(ref._data_ptr), _first_bit(ref._first_bit) {}</div><div class="line"><a name="l00605"></a><span class="lineno"> 605</span> </div><div class="line"><a name="l00606"></a><span class="lineno"> 606</span>  unsigned first_bit() const { return _first_bit; }</div><div class="line"><a name="l00607"></a><span class="lineno"> 607</span> </div><div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  integer_t get() const {</div><div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  const BitField channel_mask = static_cast< integer_t >( parent_t::max_val ) <<_first_bit;</div><div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  return static_cast< integer_t >(( this->get_data()&channel_mask ) >> _first_bit );</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> </div><div class="line"><a name="l00617"></a><span class="lineno"> 617</span> template <typename BitField, int NumBits></div><div class="line"><a name="l00618"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1packed__dynamic__channel__reference_3_01_bit_field_00_01_num_bits_00_01true_01_4.html"> 618</a></span> class packed_dynamic_channel_reference<BitField,NumBits,true></div><div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  : <span class="keyword">public</span> detail::packed_channel_reference_base<packed_dynamic_channel_reference<BitField,NumBits,true>,BitField,NumBits,true></div><div class="line"><a name="l00620"></a><span class="lineno"> 620</span> {</div><div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <span class="keyword">using</span> parent_t = detail::packed_channel_reference_base<packed_dynamic_channel_reference<BitField,NumBits,true>,BitField,NumBits,<span class="keyword">true</span>>;</div><div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <span class="keyword">friend</span> <span class="keyword">class </span>packed_dynamic_channel_reference<BitField,NumBits,false>;</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>  <span class="keywordtype">unsigned</span> _first_bit;</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="keyword">public</span>:</div><div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  <span class="keyword">using</span> const_reference = <a class="code" href="classboost_1_1gil_1_1packed__dynamic__channel__reference_3_01_bit_field_00_01_num_bits_00_01false_01_4.html">packed_dynamic_channel_reference<BitField,NumBits,false></a> <span class="keyword">const</span>;</div><div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  <span class="keyword">using</span> mutable_reference = <a class="code" href="classboost_1_1gil_1_1packed__dynamic__channel__reference_3_01_bit_field_00_01_num_bits_00_01true_01_4.html">packed_dynamic_channel_reference<BitField,NumBits,true></a> <span class="keyword">const</span>;</div><div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  <span class="keyword">using</span> integer_t = <span class="keyword">typename</span> parent_t::integer_t;</div><div class="line"><a name="l00630"></a><span class="lineno"> 630</span> </div><div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  packed_dynamic_channel_reference(<span class="keywordtype">void</span>* data_ptr, <span class="keywordtype">unsigned</span> first_bit) : parent_t(data_ptr), _first_bit(first_bit) {}</div><div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  packed_dynamic_channel_reference(<span class="keyword">const</span> packed_dynamic_channel_reference& ref) : parent_t(ref._data_ptr), _first_bit(ref._first_bit) {}</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>  packed_dynamic_channel_reference <span class="keyword">const</span>& operator=(integer_t value)<span class="keyword"> const</span></div><div class="line"><a name="l00635"></a><span class="lineno"> 635</span> <span class="keyword"> </span>{</div><div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  BOOST_ASSERT(value <= parent_t::max_val);</div><div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  set_unsafe(value);</div><div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div><div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  }</div><div class="line"><a name="l00640"></a><span class="lineno"> 640</span> </div><div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  <span class="keyword">const</span> packed_dynamic_channel_reference& operator=(<span class="keyword">const</span> mutable_reference& ref)<span class="keyword"> const </span>{ set_unsafe(ref.get()); <span class="keywordflow">return</span> *<span class="keyword">this</span>; }</div><div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  <span class="keyword">const</span> packed_dynamic_channel_reference& operator=(<span class="keyword">const</span> const_reference& ref)<span class="keyword"> const </span>{ set_unsafe(ref.get()); <span class="keywordflow">return</span> *<span class="keyword">this</span>; }</div><div class="line"><a name="l00643"></a><span class="lineno"> 643</span> </div><div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> BitField1, <span class="keywordtype">int</span> FirstBit1, <span class="keywordtype">bool</span> Mutable1></div><div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  <span class="keyword">const</span> packed_dynamic_channel_reference& operator=(<span class="keyword">const</span> packed_channel_reference<BitField1, FirstBit1, NumBits, Mutable1>& ref)<span class="keyword"> const</span></div><div class="line"><a name="l00646"></a><span class="lineno"> 646</span> <span class="keyword"> </span>{ set_unsafe(ref.get()); <span class="keywordflow">return</span> *<span class="keyword">this</span>; }</div><div class="line"><a name="l00647"></a><span class="lineno"> 647</span> </div><div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  <span class="keywordtype">unsigned</span> first_bit()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _first_bit; }</div><div class="line"><a name="l00649"></a><span class="lineno"> 649</span> </div><div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  integer_t get()<span class="keyword"> const </span>{</div><div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  <span class="keyword">const</span> BitField channel_mask = static_cast< integer_t >( parent_t::max_val ) << _first_bit;</div><div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  <span class="keywordflow">return</span> static_cast< integer_t >(( this->get_data()&channel_mask ) >> _first_bit );</div><div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  }</div><div class="line"><a name="l00654"></a><span class="lineno"> 654</span> </div><div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  <span class="keywordtype">void</span> set_unsafe(integer_t value)<span class="keyword"> const </span>{</div><div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  <span class="keyword">const</span> BitField channel_mask = static_cast< integer_t >( parent_t::max_val ) << _first_bit;</div><div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  this->set_data((this->get_data() & ~channel_mask) | value<<_first_bit);</div><div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  }</div><div class="line"><a name="l00659"></a><span class="lineno"> 659</span> };</div><div class="line"><a name="l00660"></a><span class="lineno"> 660</span> } } <span class="comment">// namespace boost::gil</span></div><div class="line"><a name="l00661"></a><span class="lineno"> 661</span> </div><div class="line"><a name="l00662"></a><span class="lineno"> 662</span> <span class="keyword">namespace </span>std {</div><div class="line"><a name="l00663"></a><span class="lineno"> 663</span> <span class="comment">// We are forced to define swap inside std namespace because on some platforms (Visual Studio 8) STL calls swap qualified.</span></div><div class="line"><a name="l00664"></a><span class="lineno"> 664</span> <span class="comment">// swap with 'left bias':</span></div><div class="line"><a name="l00665"></a><span class="lineno"> 665</span> <span class="comment">// - swap between proxy and anything</span></div><div class="line"><a name="l00666"></a><span class="lineno"> 666</span> <span class="comment">// - swap between value type and proxy</span></div><div class="line"><a name="l00667"></a><span class="lineno"> 667</span> <span class="comment">// - swap between proxy and proxy</span></div><div class="line"><a name="l00668"></a><span class="lineno"> 668</span> </div><div class="line"><a name="l00669"></a><span class="lineno"> 669</span> </div><div class="line"><a name="l00672"></a><span class="lineno"> 672</span> <span class="keyword">template</span> <<span class="keyword">typename</span> BF, <span class="keywordtype">int</span> NB, <span class="keywordtype">bool</span> M, <span class="keyword">typename</span> R> <span class="keyword">inline</span></div><div class="line"><a name="l00673"></a><span class="lineno"><a class="line" href="group___packed_channel_dynamic_reference_model.html#ga787db0870b8b34244289b895ed8345e2"> 673</a></span> <span class="keywordtype">void</span> <a class="code" href="group___packed_channel_dynamic_reference_model.html#gac4c1b188cdeb2280d9c803726e4d2cdc">swap</a>(<span class="keyword">const</span> boost::gil::packed_dynamic_channel_reference<BF,NB,M> x, R& y) {</div><div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  boost::gil::swap_proxy<typename boost::gil::packed_dynamic_channel_reference<BF,NB,M>::value_type>(x,y);</div><div class="line"><a name="l00675"></a><span class="lineno"> 675</span> }</div><div class="line"><a name="l00676"></a><span class="lineno"> 676</span> </div><div class="line"><a name="l00677"></a><span class="lineno"> 677</span> </div><div class="line"><a name="l00680"></a><span class="lineno"> 680</span> <span class="keyword">template</span> <<span class="keyword">typename</span> BF, <span class="keywordtype">int</span> NB, <span class="keywordtype">bool</span> M> <span class="keyword">inline</span></div><div class="line"><a name="l00681"></a><span class="lineno"><a class="line" href="group___packed_channel_dynamic_reference_model.html#gab7ea281b0cce57c44a9046f732e4112b"> 681</a></span> <span class="keywordtype">void</span> <a class="code" href="group___packed_channel_dynamic_reference_model.html#gac4c1b188cdeb2280d9c803726e4d2cdc">swap</a>(<span class="keyword">typename</span> boost::gil::packed_dynamic_channel_reference<BF,NB,M>::value_type& x, <span class="keyword">const</span> boost::gil::packed_dynamic_channel_reference<BF,NB,M> y) {</div><div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  boost::gil::swap_proxy<typename boost::gil::packed_dynamic_channel_reference<BF,NB,M>::value_type>(x,y);</div><div class="line"><a name="l00683"></a><span class="lineno"> 683</span> }</div><div class="line"><a name="l00684"></a><span class="lineno"> 684</span> </div><div class="line"><a name="l00687"></a><span class="lineno"> 687</span> <span class="keyword">template</span> <<span class="keyword">typename</span> BF, <span class="keywordtype">int</span> NB, <span class="keywordtype">bool</span> M> <span class="keyword">inline</span></div><div class="line"><a name="l00688"></a><span class="lineno"><a class="line" href="group___packed_channel_dynamic_reference_model.html#gac4c1b188cdeb2280d9c803726e4d2cdc"> 688</a></span> <span class="keywordtype">void</span> <a class="code" href="group___packed_channel_dynamic_reference_model.html#gac4c1b188cdeb2280d9c803726e4d2cdc">swap</a>(<span class="keyword">const</span> boost::gil::packed_dynamic_channel_reference<BF,NB,M> x, <span class="keyword">const</span> boost::gil::packed_dynamic_channel_reference<BF,NB,M> y) {</div><div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  boost::gil::swap_proxy<typename boost::gil::packed_dynamic_channel_reference<BF,NB,M>::value_type>(x,y);</div><div class="line"><a name="l00690"></a><span class="lineno"> 690</span> }</div><div class="line"><a name="l00691"></a><span class="lineno"> 691</span> } <span class="comment">// namespace std</span></div><div class="line"><a name="l00692"></a><span class="lineno"> 692</span> </div><div class="line"><a name="l00693"></a><span class="lineno"> 693</span> <span class="comment">// \brief Determines the fundamental type which may be used, e.g., to cast from larger to smaller channel types.</span></div><div class="line"><a name="l00694"></a><span class="lineno"> 694</span> <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {</div><div class="line"><a name="l00695"></a><span class="lineno"> 695</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00696"></a><span class="lineno"> 696</span> <span class="keyword">struct </span>base_channel_type_impl { <span class="keyword">using</span> type = T; };</div><div class="line"><a name="l00697"></a><span class="lineno"> 697</span> </div><div class="line"><a name="l00698"></a><span class="lineno"> 698</span> <span class="keyword">template</span> <<span class="keywordtype">int</span> N></div><div class="line"><a name="l00699"></a><span class="lineno"> 699</span> <span class="keyword">struct </span>base_channel_type_impl<packed_channel_value<N> ></div><div class="line"><a name="l00700"></a><span class="lineno"> 700</span> { <span class="keyword">using</span> type = <span class="keyword">typename</span> packed_channel_value<N>::integer_t; };</div><div class="line"><a name="l00701"></a><span class="lineno"> 701</span> </div><div class="line"><a name="l00702"></a><span class="lineno"> 702</span> <span class="keyword">template</span> <<span class="keyword">typename</span> B, <span class="keywordtype">int</span> F, <span class="keywordtype">int</span> N, <span class="keywordtype">bool</span> M></div><div class="line"><a name="l00703"></a><span class="lineno"> 703</span> <span class="keyword">struct </span>base_channel_type_impl<packed_channel_reference<B, F, N, M> ></div><div class="line"><a name="l00704"></a><span class="lineno"> 704</span> {</div><div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  <span class="keyword">using</span> type = <span class="keyword">typename</span> packed_channel_reference<B,F,N,M>::integer_t;</div><div class="line"><a name="l00706"></a><span class="lineno"> 706</span> };</div><div class="line"><a name="l00707"></a><span class="lineno"> 707</span> </div><div class="line"><a name="l00708"></a><span class="lineno"> 708</span> <span class="keyword">template</span> <<span class="keyword">typename</span> B, <span class="keywordtype">int</span> N, <span class="keywordtype">bool</span> M></div><div class="line"><a name="l00709"></a><span class="lineno"> 709</span> <span class="keyword">struct </span>base_channel_type_impl<packed_dynamic_channel_reference<B, N, M> ></div><div class="line"><a name="l00710"></a><span class="lineno"> 710</span> {</div><div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  <span class="keyword">using</span> type = <span class="keyword">typename</span> packed_dynamic_channel_reference<B,N,M>::integer_t;</div><div class="line"><a name="l00712"></a><span class="lineno"> 712</span> };</div><div class="line"><a name="l00713"></a><span class="lineno"> 713</span> </div><div class="line"><a name="l00714"></a><span class="lineno"> 714</span> <span class="keyword">template</span> <<span class="keyword">typename</span> ChannelValue, <span class="keyword">typename</span> MinV, <span class="keyword">typename</span> MaxV></div><div class="line"><a name="l00715"></a><span class="lineno"> 715</span> <span class="keyword">struct </span>base_channel_type_impl<scoped_channel_value<ChannelValue, MinV, MaxV> ></div><div class="line"><a name="l00716"></a><span class="lineno"> 716</span> { <span class="keyword">using</span> type = ChannelValue; };</div><div class="line"><a name="l00717"></a><span class="lineno"> 717</span> </div><div class="line"><a name="l00718"></a><span class="lineno"> 718</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00719"></a><span class="lineno"> 719</span> <span class="keyword">struct </span>base_channel_type : base_channel_type_impl<typename std::remove_cv<T>::type> {};</div><div class="line"><a name="l00720"></a><span class="lineno"> 720</span> </div><div class="line"><a name="l00721"></a><span class="lineno"> 721</span> }} <span class="comment">//namespace boost::gil</span></div><div class="line"><a name="l00722"></a><span class="lineno"> 722</span> </div><div class="line"><a name="l00723"></a><span class="lineno"> 723</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="group___packed_channel_dynamic_reference_model_html_gac4c1b188cdeb2280d9c803726e4d2cdc"><div class="ttname"><a href="group___packed_channel_dynamic_reference_model.html#gac4c1b188cdeb2280d9c803726e4d2cdc">std::swap</a></div><div class="ttdeci">void swap(const boost::gil::packed_dynamic_channel_reference< BF, NB, M > x, const boost::gil::packed_dynamic_channel_reference< BF, NB, M > y)</div><div class="ttdoc">swap for packed_dynamic_channel_reference</div><div class="ttdef"><b>Definition:</b> channel.hpp:688</div></div>
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