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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">//</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_IMAGE_VIEW_HPP</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#define BOOST_GIL_IMAGE_VIEW_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/dynamic_step.hpp></span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <boost/gil/iterator_from_2d.hpp></span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> </div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include <cstddef></span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <iterator></span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">namespace </span><a class="code" href="namespaceboost.html">boost</a> { <span class="keyword">namespace </span>gil {</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="keyword">template</span> <<span class="keyword">typename</span> Loc> <span class="comment">// Models 2D Pixel Locator</span></div><div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1image__view.html"> 51</a></span> <span class="keyword">class </span><a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a> {</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="keyword">public</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="comment">// aliases required by ConstRandomAccessNDImageViewConcept</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keyword">static</span> <span class="keyword">const</span> std::size_t num_dimensions=2;</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">using</span> value_type = <span class="keyword">typename</span> Loc::value_type;</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keyword">using</span> reference = <span class="keyword">typename</span> Loc::reference; <span class="comment">// result of dereferencing</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">using</span> coord_t = <span class="keyword">typename</span> Loc::coord_t; <span class="comment">// 1D difference type (same for all dimensions)</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keyword">using</span> difference_type = coord_t; <span class="comment">// result of operator-(1d_iterator,1d_iterator)</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keyword">using</span> point_t = <span class="keyword">typename</span> Loc::point_t;</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keyword">using</span> locator = Loc;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keyword">using</span> <a class="code" href="classboost_1_1gil_1_1image__view.html">const_t</a> = <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view<typename Loc::const_t></a>; <span class="comment">// same as this type, but over const values</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keyword">template</span> <std::<span class="keywordtype">size_t</span> D> <span class="keyword">struct </span>axis</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  {</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keyword">using</span> coord_t = <span class="keyword">typename</span> Loc::template axis<D>::coord_t; <span class="comment">// difference_type along each dimension</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">using</span> <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">iterator</a> = <span class="keyword">typename</span> Loc::template axis<D>::iterator; <span class="comment">// 1D iterator type along each dimension</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  };</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keyword">using</span> <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">iterator</a> = <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">iterator_from_2d<Loc></a>; <span class="comment">// 1D iterator type for each pixel left-to-right inside top-to-bottom</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keyword">using</span> const_iterator = <span class="keyword">typename</span> <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">const_t::iterator</a>; <span class="comment">// may be used to examine, but not to modify values</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">using</span> const_reference = <span class="keyword">typename</span> const_t::reference; <span class="comment">// behaves as a const reference</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keyword">using</span> pointer = <span class="keyword">typename</span> std::iterator_traits<iterator>::pointer; <span class="comment">// behaves as a pointer to the value type</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keyword">using</span> reverse_iterator = std::reverse_iterator<iterator>;</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keyword">using</span> size_type = std::size_t;</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment">// aliases required by ConstRandomAccess2DImageViewConcept</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keyword">using</span> xy_locator = locator;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">using</span> x_iterator = <span class="keyword">typename</span> xy_locator::x_iterator; <span class="comment">// pixel iterator along a row</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">using</span> y_iterator = <span class="keyword">typename</span> xy_locator::y_iterator; <span class="comment">// pixel iterator along a column</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keyword">using</span> x_coord_t = <span class="keyword">typename</span> xy_locator::x_coord_t;</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">using</span> y_coord_t = <span class="keyword">typename</span> xy_locator::y_coord_t;</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Deref> <span class="keyword">struct </span>add_deref</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  {</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">using</span> type = <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view<typename Loc::template add_deref<Deref>::type</a>>;</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keyword">static</span> type make(<span class="keyword">const</span> <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view<Loc></a>& iv, <span class="keyword">const</span> Deref& d)</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  {</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">return</span> type(iv.dimensions(), Loc::template add_deref<Deref>::make(iv.pixels(),d));</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> </div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>() : _dimensions(0,0) {}</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>(<a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a> <span class="keyword">const</span>& img_view) : _dimensions(img_view.dimensions()), _pixels(img_view.pixels()) {}</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> View> <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>(<span class="keyword">const</span> View& iv) : _dimensions(iv.dimensions()), _pixels(iv.pixels()) {}</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> L2> <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>(<span class="keyword">const</span> point_t& sz , <span class="keyword">const</span> L2& loc) : _dimensions(sz), _pixels(loc) {}</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> L2> <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>(coord_t width, coord_t height, <span class="keyword">const</span> L2& loc) : _dimensions(x_coord_t(width),y_coord_t(height)), _pixels(loc) {}</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> View> <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>& operator=(<span class="keyword">const</span> View& iv) { _pixels=iv.pixels(); _dimensions=iv.dimensions(); <span class="keywordflow">return</span> *<span class="keyword">this</span>; }</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>& operator=(<span class="keyword">const</span> <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>& iv) { _pixels=iv.pixels(); _dimensions=iv.dimensions(); <span class="keywordflow">return</span> *<span class="keyword">this</span>; }</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> View> <span class="keywordtype">bool</span> operator==(<span class="keyword">const</span> View& v)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> pixels()==v.pixels() && dimensions()==v.dimensions(); }</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> View> <span class="keywordtype">bool</span> operator!=(<span class="keyword">const</span> View& v)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> !(*<span class="keyword">this</span>==v); }</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="keyword">template</span> <<span class="keyword">typename</span> L2> <span class="keyword">friend</span> <span class="keywordtype">void</span> swap(<a class="code" href="classboost_1_1gil_1_1image__view.html">image_view<L2></a>& x, <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view<L2></a>& y);</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> </div><div class="line"><a name="l00111"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1image__view.html#a6abdcb0b8cadeb8f39806bd6413a2075"> 111</a></span>  <span class="keywordtype">void</span> <a class="code" href="classboost_1_1gil_1_1image__view.html#a6abdcb0b8cadeb8f39806bd6413a2075">swap</a>(<a class="code" href="classboost_1_1gil_1_1image__view.html">image_view<Loc></a>& other)</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="keyword">using</span> <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">boost::gil::swap</a>;</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  swap(*<span class="keyword">this</span>, other);</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  }</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><a name="l00121"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1image__view.html#ac6e61de369e994009e36f344f99c15ad"> 121</a></span>  <span class="keywordtype">bool</span> <a class="code" href="classboost_1_1gil_1_1image__view.html#ac6e61de369e994009e36f344f99c15ad">empty</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> !(width() > 0 && height() > 0); }</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div><div class="line"><a name="l00127"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1image__view.html#a6f29c8a7f499b266d4cf7a3dfd75b940"> 127</a></span>  reference <a class="code" href="classboost_1_1gil_1_1image__view.html#a6f29c8a7f499b266d4cf7a3dfd75b940">front</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> *begin(); }</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> </div><div class="line"><a name="l00133"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1image__view.html#a6c48c6a68d087259caa53b9ffae2a4f0"> 133</a></span>  reference <a class="code" href="classboost_1_1gil_1_1image__view.html#a6c48c6a68d087259caa53b9ffae2a4f0">back</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> *rbegin(); }</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> </div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keyword">const</span> point_t& dimensions()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _dimensions; }</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keyword">const</span> locator& pixels()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _pixels; }</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  x_coord_t width()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> dimensions().x; }</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  y_coord_t height()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> dimensions().y; }</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  std::size_t <a class="code" href="structboost_1_1gil_1_1num__channels.html">num_channels</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="structboost_1_1gil_1_1num__channels.html">gil::num_channels<value_type>::value</a>; }</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keywordtype">bool</span> is_1d_traversable()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _pixels.is_1d_traversable(width()); }</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>  <span class="comment">//\{@</span></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"></span> size_type <a class="code" href="structboost_1_1gil_1_1size.html">size</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> width()*height(); }</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">iterator</a> begin()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">iterator</a>(_pixels,_dimensions.x); }</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">iterator</a> end()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> begin()+(difference_type)<a class="code" href="structboost_1_1gil_1_1size.html">size</a>(); } <span class="comment">// potential performance problem!</span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  reverse_iterator rbegin()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> reverse_iterator(end()); }</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  reverse_iterator rend()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> reverse_iterator(begin()); }</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  reference operator[](difference_type i)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> begin()[i]; } <span class="comment">// potential performance problem!</span></div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">iterator</a> at(difference_type i)<span class="keyword">const </span>{ <span class="keywordflow">return</span> begin()+i; }</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">iterator</a> at(<span class="keyword">const</span> point_t& p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> begin()+p.y*width()+p.x; }</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <a class="code" href="classboost_1_1gil_1_1iterator__from__2d.html">iterator</a> at(x_coord_t x, y_coord_t y)<span class="keyword">const </span>{ <span class="keywordflow">return</span> begin()+y*width()+x; }</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>  <span class="comment">//\}@</span></div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span> </div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="comment">//\{@</span></div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment"></span> reference operator()(<span class="keyword">const</span> point_t& p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _pixels(p.x,p.y); }</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  reference operator()(x_coord_t x, y_coord_t y)<span class="keyword">const </span>{ <span class="keywordflow">return</span> _pixels(x,y); }</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keyword">template</span> <std::<span class="keywordtype">size_t</span> D> <span class="keyword">typename</span> axis<D>::iterator axis_iterator(<span class="keyword">const</span> point_t& p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _pixels.template axis_iterator<D>(p); }</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  xy_locator xy_at(x_coord_t x, y_coord_t y)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _pixels+point_t(x_coord_t(x),y_coord_t(y)); }</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  locator xy_at(<span class="keyword">const</span> point_t& p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _pixels+p; }</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="comment">//\}@</span></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="comment">//\{@</span></div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="comment"></span> x_iterator x_at(x_coord_t x, y_coord_t y)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _pixels.x_at(x,y); }</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  x_iterator x_at(<span class="keyword">const</span> point_t& p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _pixels.x_at(p); }</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  x_iterator row_begin(y_coord_t y)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> x_at(0,y); }</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  x_iterator row_end(y_coord_t y)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> x_at(width(),y); }</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="comment">//\}@</span></div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> </div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="comment">//\{@</span></div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"></span> y_iterator y_at(x_coord_t x, y_coord_t y)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> xy_at(x,y).y(); }</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  y_iterator y_at(<span class="keyword">const</span> point_t& p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> xy_at(p).y(); }</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  y_iterator col_begin(x_coord_t x)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> y_at(x,0); }</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  y_iterator col_end(x_coord_t x)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> y_at(x,height()); }</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="comment">//\}@</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> L2> <span class="keyword">friend</span> <span class="keyword">class </span><a class="code" href="classboost_1_1gil_1_1image__view.html">image_view</a>;</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span> </div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  point_t _dimensions;</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  xy_locator _pixels;</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> };</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> </div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="keyword">template</span> <<span class="keyword">typename</span> L2></div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(<a class="code" href="classboost_1_1gil_1_1image__view.html">image_view<L2></a>& x, <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view<L2></a>& y) {</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keyword">using</span> <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">std::swap</a>;</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(x._dimensions,y._dimensions);</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(x._pixels, y._pixels); <span class="comment">// TODO: Extend further</span></div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> }</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span> </div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="comment">// PixelBasedConcept</span></div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="comment"></span></div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="keyword">template</span> <<span class="keyword">typename</span> L></div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type</a><image_view<L> > : <span class="keyword">public</span> <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type</a><L> {};</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="keyword">template</span> <<span class="keyword">typename</span> L></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="keyword">struct </span>color_space_type<image_view<L> > : <span class="keyword">public</span> color_space_type<L> {};</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> </div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="keyword">template</span> <<span class="keyword">typename</span> L></div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="keyword">struct </span>channel_mapping_type<image_view<L> > : <span class="keyword">public</span> channel_mapping_type<L> {};</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="keyword">template</span> <<span class="keyword">typename</span> L></div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="keyword">struct </span>is_planar<image_view<L> > : <span class="keyword">public</span> is_planar<L> {};</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="comment">// HasDynamicXStepTypeConcept</span></div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="comment"></span></div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="keyword">template</span> <<span class="keyword">typename</span> L></div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1dynamic__x__step__type.html">dynamic_x_step_type</a><image_view<L>></div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span> {</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keyword">using</span> type = <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view<typename gil::dynamic_x_step_type<L>::type</a>>;</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> </div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment">// HasDynamicYStepTypeConcept</span></div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment"></span></div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="keyword">template</span> <<span class="keyword">typename</span> L></div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1dynamic__y__step__type.html">dynamic_y_step_type</a><image_view<L>></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>  <span class="keyword">using</span> type = <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view<typename gil::dynamic_y_step_type<L>::type</a>>;</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span> };</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span> </div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment">// HasTransposedTypeConcept</span></div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"></span></div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="keyword">template</span> <<span class="keyword">typename</span> L></div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1transposed__type.html">transposed_type</a><image_view<L>></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>  <span class="keyword">using</span> type = <a class="code" href="classboost_1_1gil_1_1image__view.html">image_view<typename transposed_type<L>::type</a>>;</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span> };</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> </div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span> }} <span class="comment">// namespace boost::gil</span></div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span> </div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="namespaceboost_html"><div class="ttname"><a href="namespaceboost.html">boost</a></div><div class="ttdef"><b>Definition:</b> algorithm.hpp:30</div></div>
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<div class="ttc" id="classboost_1_1gil_1_1image__view_html"><div class="ttname"><a href="classboost_1_1gil_1_1image__view.html">boost::gil::image_view</a></div><div class="ttdoc">A lightweight object that interprets memory as a 2D array of pixels. Models ImageViewConcept,PixelBasedConcept,HasDynamicXStepTypeConcept,HasDynamicYStepTypeConcept,HasTransposedTypeConcept. </div><div class="ttdef"><b>Definition:</b> image_view.hpp:51</div></div>
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<div class="ttc" id="classboost_1_1gil_1_1image__view_html_a6c48c6a68d087259caa53b9ffae2a4f0"><div class="ttname"><a href="classboost_1_1gil_1_1image__view.html#a6c48c6a68d087259caa53b9ffae2a4f0">boost::gil::image_view::back</a></div><div class="ttdeci">reference back() const </div><div class="ttdoc">Returns a reference to the last element in raster order. </div><div class="ttdef"><b>Definition:</b> image_view.hpp:133</div></div>
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<div class="ttc" id="classboost_1_1gil_1_1image__view_html_ac6e61de369e994009e36f344f99c15ad"><div class="ttname"><a href="classboost_1_1gil_1_1image__view.html#ac6e61de369e994009e36f344f99c15ad">boost::gil::image_view::empty</a></div><div class="ttdeci">bool empty() const </div><div class="ttdoc">Returns true if the view has no elements, false otherwise. </div><div class="ttdef"><b>Definition:</b> image_view.hpp:121</div></div>
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<div class="ttc" id="classboost_1_1gil_1_1iterator__from__2d_html"><div class="ttname"><a href="classboost_1_1gil_1_1iterator__from__2d.html">boost::gil::iterator_from_2d</a></div><div class="ttdoc">Provides 1D random-access navigation to the pixels of the image. Models: PixelIteratorConcept, PixelBasedConcept, HasDynamicXStepTypeConcept. </div><div class="ttdef"><b>Definition:</b> iterator_from_2d.hpp:42</div></div>
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<div class="ttc" id="classboost_1_1gil_1_1image__view_html_a6abdcb0b8cadeb8f39806bd6413a2075"><div class="ttname"><a href="classboost_1_1gil_1_1image__view.html#a6abdcb0b8cadeb8f39806bd6413a2075">boost::gil::image_view::swap</a></div><div class="ttdeci">void swap(image_view< Loc > &other)</div><div class="ttdoc">Exchanges the elements of the current view with those of other in constant time. </div><div class="ttdef"><b>Definition:</b> image_view.hpp:111</div></div>
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<div class="ttc" id="structboost_1_1gil_1_1transposed__type_html"><div class="ttname"><a href="structboost_1_1gil_1_1transposed__type.html">boost::gil::transposed_type</a></div><div class="ttdef"><b>Definition:</b> image_view_factory.hpp:40</div></div>
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<div class="ttc" id="structboost_1_1gil_1_1dynamic__y__step__type_html"><div class="ttname"><a href="structboost_1_1gil_1_1dynamic__y__step__type.html">boost::gil::dynamic_y_step_type</a></div><div class="ttdoc">Base template for types that model HasDynamicYStepTypeConcept. </div><div class="ttdef"><b>Definition:</b> dynamic_step.hpp:21</div></div>
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<div class="ttc" id="group___packed_channel_reference_model_html_ga70de3c85964650c16afcc42c02bd5df9"><div class="ttname"><a href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">std::swap</a></div><div class="ttdeci">void swap(boost::gil::packed_channel_reference< BF, FB, NB, M > const x, R &y)</div><div class="ttdoc">swap for packed_channel_reference </div><div class="ttdef"><b>Definition:</b> channel.hpp:524</div></div>
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<div class="ttc" id="classboost_1_1gil_1_1image__view_html_a6f29c8a7f499b266d4cf7a3dfd75b940"><div class="ttname"><a href="classboost_1_1gil_1_1image__view.html#a6f29c8a7f499b266d4cf7a3dfd75b940">boost::gil::image_view::front</a></div><div class="ttdeci">reference front() const </div><div class="ttdoc">Returns a reference to the first element in raster order. </div><div class="ttdef"><b>Definition:</b> image_view.hpp:127</div></div>
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<div class="ttc" id="structboost_1_1gil_1_1channel__type_html"><div class="ttname"><a href="structboost_1_1gil_1_1channel__type.html">boost::gil::channel_type</a></div><div class="ttdef"><b>Definition:</b> color_convert.hpp:31</div></div>
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<div class="ttc" id="structboost_1_1gil_1_1size_html"><div class="ttname"><a href="structboost_1_1gil_1_1size.html">boost::gil::size</a></div><div class="ttdoc">Returns an integral constant type specifying the number of elements in a color base. </div><div class="ttdef"><b>Definition:</b> color_base_algorithm.hpp:42</div></div>
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<div class="ttc" id="structboost_1_1gil_1_1num__channels_html"><div class="ttname"><a href="structboost_1_1gil_1_1num__channels.html">boost::gil::num_channels</a></div><div class="ttdoc">Returns the number of channels of a pixel-based GIL construct. </div><div class="ttdef"><b>Definition:</b> locator.hpp:38</div></div>
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<div class="ttc" id="structboost_1_1gil_1_1dynamic__x__step__type_html"><div class="ttname"><a href="structboost_1_1gil_1_1dynamic__x__step__type.html">boost::gil::dynamic_x_step_type</a></div><div class="ttdoc">Base template for types that model HasDynamicXStepTypeConcept. </div><div class="ttdef"><b>Definition:</b> dynamic_step.hpp:17</div></div>
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