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			219 lines
		
	
	
		
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<div class="title">mipmaps_compute.hpp</div>  </div>
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span> <span class="preprocessor">#pragma once</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno">    2</span> </div>
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<div class="line"><a name="l00003"></a><span class="lineno">    3</span> <span class="preprocessor">#include "filter_compute.hpp"</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno">    4</span> </div>
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<div class="line"><a name="l00005"></a><span class="lineno">    5</span> <span class="keyword">namespace </span><a class="code" href="a00074.html">gli</a>{</div>
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<div class="line"><a name="l00006"></a><span class="lineno">    6</span> <span class="keyword">namespace </span>detail</div>
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<div class="line"><a name="l00007"></a><span class="lineno">    7</span> {</div>
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<div class="line"><a name="l00008"></a><span class="lineno">    8</span>         <span class="keyword">template</span> <<span class="keyword">typename</span> texture_type, <span class="keyword">typename</span> sampler_value_type, <span class="keyword">typename</span> fetch_func, <span class="keyword">typename</span> write_func, <span class="keyword">typename</span> normalized_type, <span class="keyword">typename</span> texel_type></div>
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<div class="line"><a name="l00009"></a><span class="lineno">    9</span>         <span class="keyword">inline</span> <span class="keywordtype">void</span> generate_mipmaps_1d</div>
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<div class="line"><a name="l00010"></a><span class="lineno">   10</span>         (</div>
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<div class="line"><a name="l00011"></a><span class="lineno">   11</span>                 texture_type & Texture, fetch_func Fetch, write_func Write,</div>
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<div class="line"><a name="l00012"></a><span class="lineno">   12</span>                 <span class="keyword">typename</span> texture_type::size_type BaseLayer, <span class="keyword">typename</span> texture_type::size_type MaxLayer,</div>
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<div class="line"><a name="l00013"></a><span class="lineno">   13</span>                 <span class="keyword">typename</span> texture_type::size_type BaseFace, <span class="keyword">typename</span> texture_type::size_type MaxFace,</div>
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<div class="line"><a name="l00014"></a><span class="lineno">   14</span>                 <span class="keyword">typename</span> texture_type::size_type BaseLevel, <span class="keyword">typename</span> texture_type::size_type MaxLevel,</div>
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<div class="line"><a name="l00015"></a><span class="lineno">   15</span>                 <a class="code" href="a00074.html#a610876e02cee64e29fe4376ffeb6b9b9">filter</a> Min</div>
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<div class="line"><a name="l00016"></a><span class="lineno">   16</span>         )</div>
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<div class="line"><a name="l00017"></a><span class="lineno">   17</span>         {</div>
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<div class="line"><a name="l00018"></a><span class="lineno">   18</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> detail::interpolate<sampler_value_type>::type interpolate_type;</div>
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<div class="line"><a name="l00019"></a><span class="lineno">   19</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> texture_type::extent_type extent_type;</div>
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<div class="line"><a name="l00020"></a><span class="lineno">   20</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> texture_type::size_type size_type;</div>
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<div class="line"><a name="l00021"></a><span class="lineno">   21</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> extent_type::value_type component_type;</div>
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<div class="line"><a name="l00022"></a><span class="lineno">   22</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> detail::filterBase<detail::DIMENSION_1D, texture_type, interpolate_type, normalized_type, fetch_func, texel_type>::filterFunc filter_func;</div>
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<div class="line"><a name="l00023"></a><span class="lineno">   23</span> </div>
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<div class="line"><a name="l00024"></a><span class="lineno">   24</span>                 filter_func <span class="keyword">const</span> Filter = detail::get_filter<filter_func, detail::DIMENSION_1D, texture_type, interpolate_type, normalized_type, fetch_func, texel_type, sampler_value_type>(FILTER_NEAREST, Min, <span class="keyword">false</span>);</div>
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<div class="line"><a name="l00025"></a><span class="lineno">   25</span>                 GLI_ASSERT(Filter);</div>
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<div class="line"><a name="l00026"></a><span class="lineno">   26</span> </div>
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<div class="line"><a name="l00027"></a><span class="lineno">   27</span>                 <span class="keywordflow">for</span>(size_type Layer = BaseLayer; Layer <= MaxLayer; ++Layer)</div>
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<div class="line"><a name="l00028"></a><span class="lineno">   28</span>                 <span class="keywordflow">for</span>(size_type Face = BaseFace; Face <= MaxFace; ++Face)</div>
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<div class="line"><a name="l00029"></a><span class="lineno">   29</span>                 <span class="keywordflow">for</span>(size_type Level = BaseLevel; Level < MaxLevel; ++Level)</div>
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<div class="line"><a name="l00030"></a><span class="lineno">   30</span>                 {</div>
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<div class="line"><a name="l00031"></a><span class="lineno">   31</span>                         extent_type <span class="keyword">const</span>& ExtentDst = Texture.extent(Level + 1);</div>
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<div class="line"><a name="l00032"></a><span class="lineno">   32</span>                         normalized_type <span class="keyword">const</span>& Scale = normalized_type(1) / normalized_type(max(ExtentDst - extent_type(1), extent_type(1)));</div>
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<div class="line"><a name="l00033"></a><span class="lineno">   33</span> </div>
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<div class="line"><a name="l00034"></a><span class="lineno">   34</span>                         <span class="keywordflow">for</span>(component_type i = 0; i < ExtentDst.x; ++i)</div>
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<div class="line"><a name="l00035"></a><span class="lineno">   35</span>                         {</div>
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<div class="line"><a name="l00036"></a><span class="lineno">   36</span>                                 normalized_type <span class="keyword">const</span>& SamplePosition(normalized_type(static_cast<typename normalized_type::value_type>(i)) * Scale);</div>
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<div class="line"><a name="l00037"></a><span class="lineno">   37</span>                                 texel_type <span class="keyword">const</span>& Texel = Filter(Texture, Fetch, SamplePosition, Layer, Face, static_cast<sampler_value_type>(Level), texel_type(0));</div>
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<div class="line"><a name="l00038"></a><span class="lineno">   38</span>                                 Write(Texture, extent_type(i), Layer, Face, Level + 1, Texel);</div>
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<div class="line"><a name="l00039"></a><span class="lineno">   39</span>                         }</div>
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<div class="line"><a name="l00040"></a><span class="lineno">   40</span>                 }</div>
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<div class="line"><a name="l00041"></a><span class="lineno">   41</span>         }</div>
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<div class="line"><a name="l00042"></a><span class="lineno">   42</span> </div>
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<div class="line"><a name="l00043"></a><span class="lineno">   43</span>         <span class="keyword">template</span> <<span class="keyword">typename</span> texture_type, <span class="keyword">typename</span> sampler_value_type, <span class="keyword">typename</span> fetch_func, <span class="keyword">typename</span> write_func, <span class="keyword">typename</span> normalized_type, <span class="keyword">typename</span> texel_type></div>
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<div class="line"><a name="l00044"></a><span class="lineno">   44</span>         <span class="keyword">inline</span> <span class="keywordtype">void</span> generate_mipmaps_2d</div>
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<div class="line"><a name="l00045"></a><span class="lineno">   45</span>         (</div>
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<div class="line"><a name="l00046"></a><span class="lineno">   46</span>                 texture_type & Texture, fetch_func Fetch, write_func Write,</div>
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<div class="line"><a name="l00047"></a><span class="lineno">   47</span>                 <span class="keyword">typename</span> texture_type::size_type BaseLayer, <span class="keyword">typename</span> texture_type::size_type MaxLayer,</div>
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<div class="line"><a name="l00048"></a><span class="lineno">   48</span>                 <span class="keyword">typename</span> texture_type::size_type BaseFace, <span class="keyword">typename</span> texture_type::size_type MaxFace,</div>
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<div class="line"><a name="l00049"></a><span class="lineno">   49</span>                 <span class="keyword">typename</span> texture_type::size_type BaseLevel, <span class="keyword">typename</span> texture_type::size_type MaxLevel,</div>
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<div class="line"><a name="l00050"></a><span class="lineno">   50</span>                 <a class="code" href="a00074.html#a610876e02cee64e29fe4376ffeb6b9b9">filter</a> Min</div>
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<div class="line"><a name="l00051"></a><span class="lineno">   51</span>         )</div>
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<div class="line"><a name="l00052"></a><span class="lineno">   52</span>         {</div>
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<div class="line"><a name="l00053"></a><span class="lineno">   53</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> detail::interpolate<sampler_value_type>::type interpolate_type;</div>
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<div class="line"><a name="l00054"></a><span class="lineno">   54</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> texture_type::extent_type extent_type;</div>
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<div class="line"><a name="l00055"></a><span class="lineno">   55</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> texture_type::size_type size_type;</div>
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<div class="line"><a name="l00056"></a><span class="lineno">   56</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> extent_type::value_type component_type;</div>
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<div class="line"><a name="l00057"></a><span class="lineno">   57</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> detail::filterBase<detail::DIMENSION_2D, texture_type, interpolate_type, normalized_type, fetch_func, texel_type>::filterFunc filter_func;</div>
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<div class="line"><a name="l00058"></a><span class="lineno">   58</span> </div>
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<div class="line"><a name="l00059"></a><span class="lineno">   59</span>                 filter_func <span class="keyword">const</span> Filter = detail::get_filter<filter_func, detail::DIMENSION_2D, texture_type, interpolate_type, normalized_type, fetch_func, texel_type, sampler_value_type>(FILTER_NEAREST, Min, <span class="keyword">false</span>);</div>
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<div class="line"><a name="l00060"></a><span class="lineno">   60</span>                 GLI_ASSERT(Filter);</div>
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<div class="line"><a name="l00061"></a><span class="lineno">   61</span> </div>
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<div class="line"><a name="l00062"></a><span class="lineno">   62</span>                 <span class="keywordflow">for</span>(size_type Layer = BaseLayer; Layer <= MaxLayer; ++Layer)</div>
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<div class="line"><a name="l00063"></a><span class="lineno">   63</span>                 <span class="keywordflow">for</span>(size_type Face = BaseFace; Face <= MaxFace; ++Face)</div>
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<div class="line"><a name="l00064"></a><span class="lineno">   64</span>                 <span class="keywordflow">for</span>(size_type Level = BaseLevel; Level < MaxLevel; ++Level)</div>
 | 
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<div class="line"><a name="l00065"></a><span class="lineno">   65</span>                 {</div>
 | 
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<div class="line"><a name="l00066"></a><span class="lineno">   66</span>                         extent_type <span class="keyword">const</span>& ExtentDst = Texture.extent(Level + 1);</div>
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<div class="line"><a name="l00067"></a><span class="lineno">   67</span>                         normalized_type <span class="keyword">const</span>& Scale = normalized_type(1) / normalized_type(max(ExtentDst - extent_type(1), extent_type(1)));</div>
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<div class="line"><a name="l00068"></a><span class="lineno">   68</span> </div>
 | 
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<div class="line"><a name="l00069"></a><span class="lineno">   69</span>                         <span class="keywordflow">for</span>(component_type j = 0; j < ExtentDst.y; ++j)</div>
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<div class="line"><a name="l00070"></a><span class="lineno">   70</span>                         <span class="keywordflow">for</span>(component_type i = 0; i < ExtentDst.x; ++i)</div>
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<div class="line"><a name="l00071"></a><span class="lineno">   71</span>                         {</div>
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<div class="line"><a name="l00072"></a><span class="lineno">   72</span>                                 normalized_type <span class="keyword">const</span>& SamplePosition(normalized_type(i, j) * Scale);</div>
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<div class="line"><a name="l00073"></a><span class="lineno">   73</span>                                 texel_type <span class="keyword">const</span>& Texel = Filter(Texture, Fetch, SamplePosition, Layer, Face, static_cast<sampler_value_type>(Level), texel_type(0));</div>
 | 
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<div class="line"><a name="l00074"></a><span class="lineno">   74</span>                                 Write(Texture, extent_type(i, j), Layer, Face, Level + 1, Texel);</div>
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<div class="line"><a name="l00075"></a><span class="lineno">   75</span>                         }</div>
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<div class="line"><a name="l00076"></a><span class="lineno">   76</span>                 }</div>
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<div class="line"><a name="l00077"></a><span class="lineno">   77</span>         }</div>
 | 
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<div class="line"><a name="l00078"></a><span class="lineno">   78</span> </div>
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<div class="line"><a name="l00079"></a><span class="lineno">   79</span>         <span class="keyword">template</span> <<span class="keyword">typename</span> texture_type, <span class="keyword">typename</span> sampler_value_type, <span class="keyword">typename</span> fetch_func, <span class="keyword">typename</span> write_func, <span class="keyword">typename</span> normalized_type, <span class="keyword">typename</span> texel_type></div>
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<div class="line"><a name="l00080"></a><span class="lineno">   80</span>         <span class="keyword">inline</span> <span class="keywordtype">void</span> generate_mipmaps_3d</div>
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<div class="line"><a name="l00081"></a><span class="lineno">   81</span>         (</div>
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<div class="line"><a name="l00082"></a><span class="lineno">   82</span>                 texture_type & Texture, fetch_func Fetch, write_func Write,</div>
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						|
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>                 <span class="keyword">typename</span> texture_type::size_type BaseLayer, <span class="keyword">typename</span> texture_type::size_type MaxLayer,</div>
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<div class="line"><a name="l00084"></a><span class="lineno">   84</span>                 <span class="keyword">typename</span> texture_type::size_type BaseFace, <span class="keyword">typename</span> texture_type::size_type MaxFace,</div>
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<div class="line"><a name="l00085"></a><span class="lineno">   85</span>                 <span class="keyword">typename</span> texture_type::size_type BaseLevel, <span class="keyword">typename</span> texture_type::size_type MaxLevel,</div>
 | 
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<div class="line"><a name="l00086"></a><span class="lineno">   86</span>                 <a class="code" href="a00074.html#a610876e02cee64e29fe4376ffeb6b9b9">filter</a> Min</div>
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<div class="line"><a name="l00087"></a><span class="lineno">   87</span>         )</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>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> detail::interpolate<sampler_value_type>::type interpolate_type;</div>
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<div class="line"><a name="l00090"></a><span class="lineno">   90</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> texture_type::extent_type extent_type;</div>
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<div class="line"><a name="l00091"></a><span class="lineno">   91</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> texture_type::size_type size_type;</div>
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<div class="line"><a name="l00092"></a><span class="lineno">   92</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> extent_type::value_type component_type;</div>
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<div class="line"><a name="l00093"></a><span class="lineno">   93</span>                 <span class="keyword">typedef</span> <span class="keyword">typename</span> detail::filterBase<detail::DIMENSION_3D, texture_type, interpolate_type, normalized_type, fetch_func, texel_type>::filterFunc filter_func;</div>
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<div class="line"><a name="l00094"></a><span class="lineno">   94</span> </div>
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<div class="line"><a name="l00095"></a><span class="lineno">   95</span>                 filter_func <span class="keyword">const</span> Filter = detail::get_filter<filter_func, detail::DIMENSION_3D, texture_type, interpolate_type, normalized_type, fetch_func, texel_type, sampler_value_type>(FILTER_NEAREST, Min, <span class="keyword">false</span>);</div>
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<div class="line"><a name="l00096"></a><span class="lineno">   96</span>                 GLI_ASSERT(Filter);</div>
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<div class="line"><a name="l00097"></a><span class="lineno">   97</span> </div>
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<div class="line"><a name="l00098"></a><span class="lineno">   98</span>                 <span class="keywordflow">for</span>(size_type Layer = BaseLayer; Layer <= MaxLayer; ++Layer)</div>
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<div class="line"><a name="l00099"></a><span class="lineno">   99</span>                 <span class="keywordflow">for</span>(size_type Face = BaseFace; Face <= MaxFace; ++Face)</div>
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<div class="line"><a name="l00100"></a><span class="lineno">  100</span>                 <span class="keywordflow">for</span>(size_type Level = BaseLevel; Level < MaxLevel; ++Level)</div>
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<div class="line"><a name="l00101"></a><span class="lineno">  101</span>                 {</div>
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<div class="line"><a name="l00102"></a><span class="lineno">  102</span>                         extent_type <span class="keyword">const</span>& ExtentDst = Texture.extent(Level + 1);</div>
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<div class="line"><a name="l00103"></a><span class="lineno">  103</span>                         normalized_type <span class="keyword">const</span>& Scale = normalized_type(1) / normalized_type(max(ExtentDst - extent_type(1), extent_type(1)));</div>
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<div class="line"><a name="l00104"></a><span class="lineno">  104</span> </div>
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<div class="line"><a name="l00105"></a><span class="lineno">  105</span>                         <span class="keywordflow">for</span>(component_type k = 0; k < ExtentDst.z; ++k)</div>
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<div class="line"><a name="l00106"></a><span class="lineno">  106</span>                         <span class="keywordflow">for</span>(component_type j = 0; j < ExtentDst.y; ++j)</div>
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<div class="line"><a name="l00107"></a><span class="lineno">  107</span>                         <span class="keywordflow">for</span>(component_type i = 0; i < ExtentDst.x; ++i)</div>
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<div class="line"><a name="l00108"></a><span class="lineno">  108</span>                         {</div>
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<div class="line"><a name="l00109"></a><span class="lineno">  109</span>                                 normalized_type <span class="keyword">const</span>& SamplePosition(normalized_type(i, j, k) * Scale);</div>
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<div class="line"><a name="l00110"></a><span class="lineno">  110</span>                                 texel_type <span class="keyword">const</span>& Texel = Filter(Texture, Fetch, SamplePosition, Layer, Face, static_cast<sampler_value_type>(Level), texel_type(0));</div>
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<div class="line"><a name="l00111"></a><span class="lineno">  111</span>                                 Write(Texture, extent_type(i, j, k), Layer, Face, Level + 1, Texel);</div>
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<div class="line"><a name="l00112"></a><span class="lineno">  112</span>                         }</div>
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<div class="line"><a name="l00113"></a><span class="lineno">  113</span>                 }</div>
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<div class="line"><a name="l00114"></a><span class="lineno">  114</span>         }</div>
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<div class="line"><a name="l00115"></a><span class="lineno">  115</span> }<span class="comment">//namespace detail</span></div>
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<div class="line"><a name="l00116"></a><span class="lineno">  116</span> }<span class="comment">//namespace gli</span></div>
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<div class="ttc" id="a00074_html_a610876e02cee64e29fe4376ffeb6b9b9"><div class="ttname"><a href="a00074.html#a610876e02cee64e29fe4376ffeb6b9b9">gli::filter</a></div><div class="ttdeci">filter</div><div class="ttdoc">Texture filtring modes. </div><div class="ttdef"><b>Definition:</b> <a href="a00030_source.html#l00009">filter.hpp:9</a></div></div>
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<div class="ttc" id="a00074_html"><div class="ttname"><a href="a00074.html">gli</a></div><div class="ttdoc">Namespace where all the classes and functions provided by GLI are exposed. </div><div class="ttdef"><b>Definition:</b> <a href="a00020_source.html#l00006">clear.hpp:6</a></div></div>
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