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<a href="screen_2color_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// Copyright 2020 Arthur Sonzogni. All rights reserved.</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">// Use of this source code is governed by the MIT license that can be found in</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">// the LICENSE file.</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="preprocessor">#include &quot;<a class="code" href="color_8hpp.html">ftxui/screen/color.hpp</a>&quot;</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span> </div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="preprocessor">#include &lt;array&gt;</span> <span class="comment">// for array</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="preprocessor">#include &lt;cmath&gt;</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="preprocessor">#include &lt;cstdint&gt;</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#include &lt;string&gt;</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span> </div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include &quot;<a class="code" href="color__info_8hpp.html">ftxui/screen/color_info.hpp</a>&quot;</span> <span class="comment">// for GetColorInfo, ColorInfo</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#include &quot;<a class="code" href="terminal_8hpp.html">ftxui/screen/terminal.hpp</a>&quot;</span> <span class="comment">// for ColorSupport, Color, Palette256, TrueColor</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> </div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceftxui.html">ftxui</a> {</div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="keyword">namespace </span>{</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="keyword">const</span> std::array&lt;const char*, 33&gt; palette16code = {</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> <span class="stringliteral">&quot;30&quot;</span>, <span class="stringliteral">&quot;40&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> <span class="stringliteral">&quot;31&quot;</span>, <span class="stringliteral">&quot;41&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> <span class="stringliteral">&quot;32&quot;</span>, <span class="stringliteral">&quot;42&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> <span class="stringliteral">&quot;33&quot;</span>, <span class="stringliteral">&quot;43&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> <span class="stringliteral">&quot;34&quot;</span>, <span class="stringliteral">&quot;44&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> <span class="stringliteral">&quot;35&quot;</span>, <span class="stringliteral">&quot;45&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> <span class="stringliteral">&quot;36&quot;</span>, <span class="stringliteral">&quot;46&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> <span class="stringliteral">&quot;37&quot;</span>, <span class="stringliteral">&quot;47&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> <span class="stringliteral">&quot;90&quot;</span>, <span class="stringliteral">&quot;100&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> <span class="stringliteral">&quot;91&quot;</span>, <span class="stringliteral">&quot;101&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> <span class="stringliteral">&quot;92&quot;</span>, <span class="stringliteral">&quot;102&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> <span class="stringliteral">&quot;93&quot;</span>, <span class="stringliteral">&quot;103&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> <span class="stringliteral">&quot;94&quot;</span>, <span class="stringliteral">&quot;104&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> <span class="stringliteral">&quot;95&quot;</span>, <span class="stringliteral">&quot;105&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> <span class="stringliteral">&quot;96&quot;</span>, <span class="stringliteral">&quot;106&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> <span class="stringliteral">&quot;97&quot;</span>, <span class="stringliteral">&quot;107&quot;</span>, <span class="comment">//</span></div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span>};</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> </div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span>} <span class="comment">// namespace</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> </div>
<div class="foldopen" id="foldopen00037" data-start="{" data-end="}">
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"><a class="line" href="group__screen.html#a66275ebe4681464e082660fa6be9ba28"> 37</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="group__screen.html#a66275ebe4681464e082660fa6be9ba28">Color::operator==</a>(<span class="keyword">const</span> <a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a>&amp; rhs)<span class="keyword"> const </span>{</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> <span class="keywordflow">return</span> red_ == rhs.red_ &amp;&amp; green_ == rhs.green_ &amp;&amp; blue_ == rhs.blue_ &amp;&amp;</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> type_ == rhs.type_;</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span>}</div>
</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="foldopen" id="foldopen00042" data-start="{" data-end="}">
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"><a class="line" href="group__screen.html#a5db052159bd2c738ea453d9b9600513a"> 42</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="group__screen.html#a5db052159bd2c738ea453d9b9600513a">Color::operator!=</a>(<span class="keyword">const</span> <a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a>&amp; rhs)<span class="keyword"> const </span>{</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keywordflow">return</span> !<a class="code hl_function" href="group__screen.html#a66275ebe4681464e082660fa6be9ba28">operator==</a>(rhs);</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span>}</div>
</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> </div>
<div class="foldopen" id="foldopen00046" data-start="{" data-end="}">
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"><a class="line" href="group__screen.html#acfe358aa128835387b6c2b7ffe22bab5"> 46</a></span>std::string <a class="code hl_function" href="group__screen.html#acfe358aa128835387b6c2b7ffe22bab5">Color::Print</a>(<span class="keywordtype">bool</span> is_background_color)<span class="keyword"> const </span>{</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="keywordflow">if</span> (is_background_color) {</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> <span class="keywordflow">switch</span> (type_) {</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keywordflow">case</span> ColorType::Palette1:</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keywordflow">return</span> <span class="stringliteral">&quot;49&quot;</span>;</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keywordflow">case</span> ColorType::Palette16:</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="keywordflow">return</span> palette16code[2 * red_ + 1]; <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="keywordflow">case</span> ColorType::Palette256:</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="keywordflow">return</span> <span class="stringliteral">&quot;48;5;&quot;</span> + std::to_string(red_);</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> <span class="keywordflow">case</span> ColorType::TrueColor:</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keywordflow">return</span> <span class="stringliteral">&quot;48;2;&quot;</span> + std::to_string(red_) + <span class="stringliteral">&quot;;&quot;</span> + std::to_string(green_) +</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="stringliteral">&quot;;&quot;</span> + std::to_string(blue_);</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> }</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keywordflow">switch</span> (type_) {</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <span class="keywordflow">case</span> ColorType::Palette1:</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> <span class="keywordflow">return</span> <span class="stringliteral">&quot;39&quot;</span>;</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <span class="keywordflow">case</span> ColorType::Palette16:</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keywordflow">return</span> palette16code[2 * red_]; <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <span class="keywordflow">case</span> ColorType::Palette256:</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">return</span> <span class="stringliteral">&quot;38;5;&quot;</span> + std::to_string(red_);</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keywordflow">case</span> ColorType::TrueColor:</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keywordflow">return</span> <span class="stringliteral">&quot;38;2;&quot;</span> + std::to_string(red_) + <span class="stringliteral">&quot;;&quot;</span> + std::to_string(green_) +</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="stringliteral">&quot;;&quot;</span> + std::to_string(blue_);</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> }</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> }</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="comment">// NOTREACHED();</span></div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keywordflow">return</span> <span class="stringliteral">&quot;&quot;</span>;</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span>}</div>
</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span><span class="comment"></span> </div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span><span class="comment">/// @brief Build a transparent color.</span></div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span><span class="comment"></span><a class="code hl_function" href="group__screen.html#a1589b83974b42a2f3315624f14c3c92c">Color::Color</a>() = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span><span class="comment"></span> </div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span><span class="comment">/// @brief Build a transparent color.</span></div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"><a class="line" href="group__screen.html#a3c93cb793b88256235f17235c9359b35"> 80</a></span><span class="comment"></span><a class="code hl_function" href="group__screen.html#a1589b83974b42a2f3315624f14c3c92c">Color::Color</a>(<a class="code hl_enumeration" href="group__screen.html#aa4be56f94fc180d7b070df23c235b0c7">Palette1</a> <span class="comment">/*value*/</span>) : <a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a>() {}</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span><span class="comment"></span> </div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span><span class="comment">/// @brief Build a color using the Palette16 colors.</span></div>
<div class="foldopen" id="foldopen00083" data-start="{" data-end="}">
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"><a class="line" href="group__screen.html#a55decaa0b2ab846729582f5f7b6acb49"> 83</a></span><span class="comment"></span><a class="code hl_function" href="group__screen.html#a1589b83974b42a2f3315624f14c3c92c">Color::Color</a>(<a class="code hl_enumeration" href="group__screen.html#ae2b6d9670960e89c66d7b76167a0802f">Palette16</a> index)</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> : type_(ColorType::<a class="code hl_enumeration" href="group__screen.html#ae2b6d9670960e89c66d7b76167a0802f">Palette16</a>), red_(index), alpha_(255) {}</div>
</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span><span class="comment"></span> </div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span><span class="comment">/// @brief Build a color using Palette256 colors.</span></div>
<div class="foldopen" id="foldopen00087" data-start="{" data-end="}">
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"><a class="line" href="group__screen.html#a4f2602aacaf27a6482580fea0f7de0d2"> 87</a></span><span class="comment"></span><a class="code hl_function" href="group__screen.html#a1589b83974b42a2f3315624f14c3c92c">Color::Color</a>(<a class="code hl_enumeration" href="group__screen.html#abd07c48f62cc507fafa2486a43130fcf">Palette256</a> index)</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> : type_(ColorType::<a class="code hl_enumeration" href="group__screen.html#abd07c48f62cc507fafa2486a43130fcf">Palette256</a>), red_(index), alpha_(255) {</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> <span class="keywordflow">if</span> (Terminal::ColorSupport() &gt;= <a class="code hl_enumvalue" href="group__screen.html#ggab87bacfdad76e61b9412d7124be44c1ca7b88ab2a5c8fe8866c96ea4acb623876">Terminal::Color::Palette256</a>) {</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> }</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> type_ = ColorType::Palette16;</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> red_ = <a class="code hl_function" href="namespaceftxui.html#a883a81f30fb771a82f6c87b77ac3658e">GetColorInfo</a>(<a class="code hl_enumeration" href="group__screen.html#abd07c48f62cc507fafa2486a43130fcf">Color::Palette256</a>(red_)).<a class="code hl_variable" href="group__screen.html#a6259df4cdd9a7cae286f46a471e9afa5">index_16</a>;</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span>}</div>
</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span><span class="comment"></span> </div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span><span class="comment">/// @brief Build a Color from its RGB representation.</span></div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span><span class="comment">/// https://en.wikipedia.org/wiki/RGB_color_model</span></div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span><span class="comment">///</span></div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span><span class="comment">/// @param red The quantity of red [0,255]</span></div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span><span class="comment">/// @param green The quantity of green [0,255]</span></div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span><span class="comment">/// @param blue The quantity of blue [0,255]</span></div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span><span class="comment">/// @param alpha The quantity of alpha [0,255]</span></div>
<div class="foldopen" id="foldopen00103" data-start="{" data-end="}">
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"><a class="line" href="group__screen.html#a92d70d7572b7a07d2af4ff650e272e08"> 103</a></span><span class="comment"></span><a class="code hl_function" href="group__screen.html#a1589b83974b42a2f3315624f14c3c92c">Color::Color</a>(uint8_t red, uint8_t green, uint8_t blue, uint8_t alpha)</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> : type_(ColorType::TrueColor),</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> red_(red),</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> green_(green),</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> blue_(blue),</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> alpha_(alpha) {</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <span class="keywordflow">if</span> (Terminal::ColorSupport() == <a class="code hl_enumvalue" href="group__screen.html#ggab87bacfdad76e61b9412d7124be44c1ca7afd9568e82d523c91b2bfe0cc47be29">Terminal::Color::TrueColor</a>) {</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> }</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> </div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <span class="comment">// Find the closest Color from the database:</span></div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> <span class="keyword">const</span> <span class="keywordtype">int</span> max_distance = 256 * 256 * 3;</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> <span class="keywordtype">int</span> closest = max_distance;</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> <span class="keywordtype">int</span> best = 0;</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> <span class="keyword">const</span> <span class="keywordtype">int</span> database_begin = 16;</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <span class="keyword">const</span> <span class="keywordtype">int</span> database_end = 256;</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = database_begin; i &lt; database_end; ++i) {</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <span class="keyword">const</span> <a class="code hl_struct" href="group__screen.html#structftxui_1_1ColorInfo">ColorInfo</a> color_info = <a class="code hl_function" href="namespaceftxui.html#a883a81f30fb771a82f6c87b77ac3658e">GetColorInfo</a>(<a class="code hl_enumeration" href="group__screen.html#abd07c48f62cc507fafa2486a43130fcf">Color::Palette256</a>(i));</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> <span class="keyword">const</span> <span class="keywordtype">int</span> dr = color_info.<a class="code hl_variable" href="group__screen.html#ad47d918910aaa51c73160ac85999d09c">red</a> - red;</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> <span class="keyword">const</span> <span class="keywordtype">int</span> dg = color_info.<a class="code hl_variable" href="group__screen.html#a90d21fa503b626c00cdc8d94863d5877">green</a> - green;</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> <span class="keyword">const</span> <span class="keywordtype">int</span> db = color_info.<a class="code hl_variable" href="group__screen.html#a287b397e90d7b995c81ff54e741f96b2">blue</a> - blue;</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> <span class="keyword">const</span> <span class="keywordtype">int</span> dist = dr * dr + dg * dg + db * db;</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> <span class="keywordflow">if</span> (closest &gt; dist) {</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> closest = dist;</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> best = i;</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> }</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> }</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> </div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> <span class="keywordflow">if</span> (Terminal::ColorSupport() == <a class="code hl_enumvalue" href="group__screen.html#ggab87bacfdad76e61b9412d7124be44c1ca7b88ab2a5c8fe8866c96ea4acb623876">Terminal::Color::Palette256</a>) {</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> type_ = ColorType::Palette256;</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> red_ = best;</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> type_ = ColorType::Palette16;</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> red_ = <a class="code hl_function" href="namespaceftxui.html#a883a81f30fb771a82f6c87b77ac3658e">GetColorInfo</a>(<a class="code hl_enumeration" href="group__screen.html#abd07c48f62cc507fafa2486a43130fcf">Color::Palette256</a>(best)).<a class="code hl_variable" href="group__screen.html#a6259df4cdd9a7cae286f46a471e9afa5">index_16</a>;</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> }</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span>}</div>
</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span><span class="comment"></span> </div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span><span class="comment">/// @brief Build a Color from its RGB representation.</span></div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span><span class="comment">/// https://en.wikipedia.org/wiki/RGB_color_model</span></div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span><span class="comment">///</span></div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span><span class="comment">/// @param red The quantity of red [0,255]</span></div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span><span class="comment">/// @param green The quantity of green [0,255]</span></div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span><span class="comment">/// @param blue The quantity of blue [0,255]</span></div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span><span class="comment"></span><span class="comment">// static</span></div>
<div class="foldopen" id="foldopen00147" data-start="{" data-end="}">
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"><a class="line" href="group__screen.html#aacec69e0aa1063fbec2cc305e7b076dd"> 147</a></span><a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> <a class="code hl_function" href="group__screen.html#aacec69e0aa1063fbec2cc305e7b076dd">Color::RGB</a>(uint8_t red, uint8_t green, uint8_t blue) {</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> <span class="keywordflow">return</span> <a class="code hl_function" href="group__screen.html#a2649c83ca263094811d2c537d44b59b4">RGBA</a>(red, green, blue, 255);</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span>}</div>
</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span><span class="comment"></span> </div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span><span class="comment">/// @brief Build a Color from its RGBA representation.</span></div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span><span class="comment">/// https://en.wikipedia.org/wiki/RGB_color_model</span></div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span><span class="comment">/// @param red The quantity of red [0,255]</span></div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span><span class="comment">/// @param green The quantity of green [0,255]</span></div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span><span class="comment">/// @param blue The quantity of blue [0,255]</span></div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span><span class="comment">/// @param alpha The quantity of alpha [0,255]</span></div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span><span class="comment">/// @see Color::RGB</span></div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span><span class="comment"></span><span class="comment">// static</span></div>
<div class="foldopen" id="foldopen00159" data-start="{" data-end="}">
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"><a class="line" href="group__screen.html#a2649c83ca263094811d2c537d44b59b4"> 159</a></span><a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> <a class="code hl_function" href="group__screen.html#a2649c83ca263094811d2c537d44b59b4">Color::RGBA</a>(uint8_t red, uint8_t green, uint8_t blue, uint8_t alpha) {</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> <span class="keywordflow">return</span> {red, green, blue, alpha};</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span>}</div>
</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span><span class="comment"></span> </div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span><span class="comment">/// @brief Build a Color from its HSV representation.</span></div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span><span class="comment">/// https://en.wikipedia.org/wiki/HSL_and_HSV</span></div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span><span class="comment">///</span></div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span><span class="comment">/// @param h The hue of the color [0,255]</span></div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span><span class="comment">/// @param s The &quot;colorfulness&quot; [0,255].</span></div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span><span class="comment">/// @param v The &quot;Lightness&quot; [0,255]</span></div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span><span class="comment">/// @param alpha The quantity of alpha [0,255]</span></div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span><span class="comment"></span><span class="comment">// static</span></div>
<div class="foldopen" id="foldopen00171" data-start="{" data-end="}">
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"><a class="line" href="group__screen.html#af067d3410c55684d727aeb29bc8d2af2"> 171</a></span><a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> <a class="code hl_function" href="group__screen.html#af067d3410c55684d727aeb29bc8d2af2">Color::HSVA</a>(uint8_t h, uint8_t s, uint8_t v, uint8_t alpha) {</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> uint8_t region = h / 43; <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> uint8_t remainder = (h - (region * 43)) * 6; <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> uint8_t p = (v * (255 - s)) &gt;&gt; 8; <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> uint8_t q = (v * (255 - ((s * remainder) &gt;&gt; 8))) &gt;&gt; 8; <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> uint8_t t = (v * (255 - ((s * (255 - remainder)) &gt;&gt; 8))) &gt;&gt; 8; <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> </div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> <span class="comment">// clang-format off</span></div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> <span class="keywordflow">switch</span> (region) { <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> <span class="keywordflow">case</span> 0: <span class="keywordflow">return</span> <a class="code hl_function" href="group__screen.html#a1589b83974b42a2f3315624f14c3c92c">Color</a>(v,t,p, alpha); <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> <span class="keywordflow">case</span> 1: <span class="keywordflow">return</span> <a class="code hl_function" href="group__screen.html#a1589b83974b42a2f3315624f14c3c92c">Color</a>(q,v,p, alpha); <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> <span class="keywordflow">case</span> 2: <span class="keywordflow">return</span> <a class="code hl_function" href="group__screen.html#a1589b83974b42a2f3315624f14c3c92c">Color</a>(p,v,t, alpha); <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> <span class="keywordflow">case</span> 3: <span class="keywordflow">return</span> <a class="code hl_function" href="group__screen.html#a1589b83974b42a2f3315624f14c3c92c">Color</a>(p,q,v, alpha); <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> <span class="keywordflow">case</span> 4: <span class="keywordflow">return</span> <a class="code hl_function" href="group__screen.html#a1589b83974b42a2f3315624f14c3c92c">Color</a>(t,p,v, alpha); <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> <span class="keywordflow">case</span> 5: <span class="keywordflow">return</span> <a class="code hl_function" href="group__screen.html#a1589b83974b42a2f3315624f14c3c92c">Color</a>(v,p,q, alpha); <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> } <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> <span class="comment">// clang-format on</span></div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span> <span class="keywordflow">return</span> {0, 0, 0, alpha};</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span>}</div>
</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span><span class="comment"></span> </div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span><span class="comment">/// @brief Build a Color from its HSV representation.</span></div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span><span class="comment">/// https://en.wikipedia.org/wiki/HSL_and_HSV</span></div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span><span class="comment">///</span></div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span><span class="comment">/// @param h The hue of the color [0,255]</span></div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span><span class="comment">/// @param s The &quot;colorfulness&quot; [0,255].</span></div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span><span class="comment">/// @param v The &quot;Lightness&quot; [0,255]</span></div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span><span class="comment"></span><span class="comment">// static</span></div>
<div class="foldopen" id="foldopen00198" data-start="{" data-end="}">
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"><a class="line" href="group__screen.html#a1a119fd00beafc7d2aa5f94518e38fc5"> 198</a></span><a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> <a class="code hl_function" href="group__screen.html#a1a119fd00beafc7d2aa5f94518e38fc5">Color::HSV</a>(uint8_t h, uint8_t s, uint8_t v) {</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> <span class="keywordflow">return</span> <a class="code hl_function" href="group__screen.html#af067d3410c55684d727aeb29bc8d2af2">HSVA</a>(h, s, v, 255);</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span>}</div>
</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> </div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span><span class="comment">// static</span></div>
<div class="foldopen" id="foldopen00203" data-start="{" data-end="}">
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"><a class="line" href="group__screen.html#ae5d82c5fbae4f6561c9471c11c0a461b"> 203</a></span><a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> <a class="code hl_function" href="group__screen.html#ae5d82c5fbae4f6561c9471c11c0a461b">Color::Interpolate</a>(<span class="keywordtype">float</span> t, <span class="keyword">const</span> <a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a>&amp; a, <span class="keyword">const</span> <a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a>&amp; b) {</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span> <span class="keywordflow">if</span> (a.type_ == ColorType::Palette1 || <span class="comment">//</span></div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span> b.type_ == ColorType::Palette1) {</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span> <span class="keywordflow">if</span> (t &lt; 0.5F) { <span class="comment">// NOLINT</span></div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"> 207</span> <span class="keywordflow">return</span> a;</div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span> <span class="keywordflow">return</span> b;</div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span> }</div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span> }</div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span> </div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span> <span class="keyword">auto</span> get_color = [](<span class="keyword">const</span> <a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a>&amp; <a class="code hl_function" href="group__dom.html#gaf61b489da39ca5e24b68e6e1a2b09c0d">color</a>, <span class="comment">//</span></div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> uint8_t* red, uint8_t* green, uint8_t* blue) {</div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span> <span class="keywordflow">switch</span> (color.type_) {</div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span> <span class="keywordflow">case</span> ColorType::Palette1: {</div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span> }</div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno"> 219</span> </div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno"> 220</span> <span class="keywordflow">case</span> ColorType::Palette16: {</div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"> 221</span> <span class="keyword">const</span> <a class="code hl_struct" href="group__screen.html#structftxui_1_1ColorInfo">ColorInfo</a> info = <a class="code hl_function" href="namespaceftxui.html#a883a81f30fb771a82f6c87b77ac3658e">GetColorInfo</a>(<a class="code hl_enumeration" href="group__screen.html#ae2b6d9670960e89c66d7b76167a0802f">Color::Palette16</a>(color.red_));</div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span> *red = info.<a class="code hl_variable" href="group__screen.html#ad47d918910aaa51c73160ac85999d09c">red</a>;</div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span> *green = info.<a class="code hl_variable" href="group__screen.html#a90d21fa503b626c00cdc8d94863d5877">green</a>;</div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span> *blue = info.<a class="code hl_variable" href="group__screen.html#a287b397e90d7b995c81ff54e741f96b2">blue</a>;</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span> }</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span> </div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span> <span class="keywordflow">case</span> ColorType::Palette256: {</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span> <span class="keyword">const</span> <a class="code hl_struct" href="group__screen.html#structftxui_1_1ColorInfo">ColorInfo</a> info = <a class="code hl_function" href="namespaceftxui.html#a883a81f30fb771a82f6c87b77ac3658e">GetColorInfo</a>(<a class="code hl_enumeration" href="group__screen.html#abd07c48f62cc507fafa2486a43130fcf">Color::Palette256</a>(color.red_));</div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> *red = info.<a class="code hl_variable" href="group__screen.html#ad47d918910aaa51c73160ac85999d09c">red</a>;</div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span> *green = info.<a class="code hl_variable" href="group__screen.html#a90d21fa503b626c00cdc8d94863d5877">green</a>;</div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span> *blue = info.<a class="code hl_variable" href="group__screen.html#a287b397e90d7b995c81ff54e741f96b2">blue</a>;</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span> }</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span> </div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span> <span class="keywordflow">case</span> ColorType::TrueColor:</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno"> 237</span> <span class="keywordflow">default</span>: {</div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno"> 238</span> *red = color.red_;</div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno"> 239</span> *green = color.green_;</div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno"> 240</span> *blue = color.blue_;</div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno"> 241</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno"> 242</span> }</div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno"> 243</span> }</div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span> };</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span> </div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span> uint8_t a_r = 0;</div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span> uint8_t a_g = 0;</div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span> uint8_t a_b = 0;</div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span> uint8_t b_r = 0;</div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span> uint8_t b_g = 0;</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span> uint8_t b_b = 0;</div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span> get_color(a, &amp;a_r, &amp;a_g, &amp;a_b);</div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span> get_color(b, &amp;b_r, &amp;b_g, &amp;b_b);</div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span> </div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span> <span class="comment">// Gamma correction:</span></div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span> <span class="comment">// https://en.wikipedia.org/wiki/Gamma_correction</span></div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span> <span class="keyword">auto</span> interp = [t](uint8_t a_u, uint8_t b_u) {</div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"> 258</span> <span class="keyword">constexpr</span> <span class="keywordtype">float</span> gamma = 2.2F;</div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span> <span class="keyword">const</span> <span class="keywordtype">float</span> a_f = powf(a_u, gamma);</div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"> 260</span> <span class="keyword">const</span> <span class="keywordtype">float</span> b_f = powf(b_u, gamma);</div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"> 261</span> <span class="keyword">const</span> <span class="keywordtype">float</span> c_f = a_f * (1.0F - t) + <span class="comment">//</span></div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span> b_f * t;</div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span> <span class="keywordflow">return</span> <span class="keyword">static_cast&lt;</span>uint8_t<span class="keyword">&gt;</span>(powf(c_f, 1.F / gamma));</div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"> 264</span> };</div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"> 265</span> <span class="keywordflow">return</span> <a class="code hl_function" href="group__screen.html#aacec69e0aa1063fbec2cc305e7b076dd">Color::RGB</a>(interp(a_r, b_r), <span class="comment">//</span></div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span> interp(a_g, b_g), <span class="comment">//</span></div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"> 267</span> interp(a_b, b_b)); <span class="comment">//</span></div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno"> 268</span>}</div>
</div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno"> 269</span><span class="comment"></span> </div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span><span class="comment">/// @brief Blend two colors together using the alpha channel.</span></div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span><span class="comment"></span><span class="comment">// static</span></div>
<div class="foldopen" id="foldopen00272" data-start="{" data-end="}">
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"><a class="line" href="group__screen.html#a3422660268648b5a260ac94336e7e405"> 272</a></span><a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> <a class="code hl_function" href="group__screen.html#a3422660268648b5a260ac94336e7e405">Color::Blend</a>(<span class="keyword">const</span> <a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a>&amp; lhs, <span class="keyword">const</span> <a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a>&amp; rhs) {</div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno"> 273</span> <a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> out = <a class="code hl_function" href="group__screen.html#ae5d82c5fbae4f6561c9471c11c0a461b">Interpolate</a>(<span class="keywordtype">float</span>(rhs.alpha_) / 255.F, lhs, rhs);</div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno"> 274</span> out.alpha_ = lhs.alpha_ + rhs.alpha_ - lhs.alpha_ * rhs.alpha_ / 255;</div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno"> 275</span> <span class="keywordflow">return</span> out;</div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno"> 276</span>}</div>
</div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"> 277</span> </div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"> 278</span><span class="keyword">inline</span> <span class="keyword">namespace </span>literals {</div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"> 279</span> </div>
<div class="foldopen" id="foldopen00280" data-start="{" data-end="}">
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"><a class="line" href="namespaceftxui_1_1literals.html#a66d988ecc082819b1671ee2bbadebccd"> 280</a></span><a class="code hl_class" href="group__screen.html#classftxui_1_1Color">Color</a> <span class="keyword">operator</span><span class="stringliteral">&quot;&quot;</span>_rgb(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> <span class="keywordtype">int</span> combined) {</div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"> 281</span> <span class="comment">// assert(combined &lt;= 0xffffffU);</span></div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span> <span class="keyword">auto</span> <span class="keyword">const</span> red = <span class="keyword">static_cast&lt;</span>uint8_t<span class="keyword">&gt;</span>(combined &gt;&gt; 16U);</div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span> <span class="keyword">auto</span> <span class="keyword">const</span> green = <span class="keyword">static_cast&lt;</span>uint8_t<span class="keyword">&gt;</span>(combined &gt;&gt; 8U);</div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span> <span class="keyword">auto</span> <span class="keyword">const</span> blue = <span class="keyword">static_cast&lt;</span>uint8_t<span class="keyword">&gt;</span>(combined);</div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span> <span class="keywordflow">return</span> {red, green, blue};</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span>}</div>
</div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span> </div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span>} <span class="comment">// namespace literals</span></div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span> </div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span>} <span class="comment">// namespace ftxui</span></div>
<div class="ttc" id="acolor_8hpp_html"><div class="ttname"><a href="color_8hpp.html">color.hpp</a></div></div>
<div class="ttc" id="acolor__info_8hpp_html"><div class="ttname"><a href="color__info_8hpp.html">color_info.hpp</a></div></div>
<div class="ttc" id="agroup__dom_html_gaf61b489da39ca5e24b68e6e1a2b09c0d"><div class="ttname"><a href="group__dom.html#gaf61b489da39ca5e24b68e6e1a2b09c0d">ftxui::color</a></div><div class="ttdeci">Decorator color(Color)</div><div class="ttdoc">Decorate using a foreground color.</div><div class="ttdef"><b>Definition</b> <a href="dom_2color_8cpp_source.html#l00110">dom/color.cpp:110</a></div></div>
<div class="ttc" id="agroup__screen_html_a1589b83974b42a2f3315624f14c3c92c"><div class="ttname"><a href="group__screen.html#a1589b83974b42a2f3315624f14c3c92c">ftxui::Color::Color</a></div><div class="ttdeci">Color()</div><div class="ttdoc">Build a transparent color.</div></div>
<div class="ttc" id="agroup__screen_html_a1a119fd00beafc7d2aa5f94518e38fc5"><div class="ttname"><a href="group__screen.html#a1a119fd00beafc7d2aa5f94518e38fc5">ftxui::Color::HSV</a></div><div class="ttdeci">static Color HSV(uint8_t hue, uint8_t saturation, uint8_t value)</div><div class="ttdoc">Build a Color from its HSV representation. https://en.wikipedia.org/wiki/HSL_and_HSV.</div><div class="ttdef"><b>Definition</b> <a href="#l00198">screen/color.cpp:198</a></div></div>
<div class="ttc" id="agroup__screen_html_a2649c83ca263094811d2c537d44b59b4"><div class="ttname"><a href="group__screen.html#a2649c83ca263094811d2c537d44b59b4">ftxui::Color::RGBA</a></div><div class="ttdeci">static Color RGBA(uint8_t red, uint8_t green, uint8_t blue, uint8_t alpha)</div><div class="ttdoc">Build a Color from its RGBA representation. https://en.wikipedia.org/wiki/RGB_color_model.</div><div class="ttdef"><b>Definition</b> <a href="#l00159">screen/color.cpp:159</a></div></div>
<div class="ttc" id="agroup__screen_html_a287b397e90d7b995c81ff54e741f96b2"><div class="ttname"><a href="group__screen.html#a287b397e90d7b995c81ff54e741f96b2">ftxui::ColorInfo::blue</a></div><div class="ttdeci">uint8_t blue</div><div class="ttdef"><b>Definition</b> <a href="color__info_8hpp_source.html#l00022">color_info.hpp:22</a></div></div>
<div class="ttc" id="agroup__screen_html_a3422660268648b5a260ac94336e7e405"><div class="ttname"><a href="group__screen.html#a3422660268648b5a260ac94336e7e405">ftxui::Color::Blend</a></div><div class="ttdeci">static Color Blend(const Color &amp;lhs, const Color &amp;rhs)</div><div class="ttdoc">Blend two colors together using the alpha channel.</div><div class="ttdef"><b>Definition</b> <a href="#l00272">screen/color.cpp:272</a></div></div>
<div class="ttc" id="agroup__screen_html_a5db052159bd2c738ea453d9b9600513a"><div class="ttname"><a href="group__screen.html#a5db052159bd2c738ea453d9b9600513a">ftxui::Color::operator!=</a></div><div class="ttdeci">bool operator!=(const Color &amp;rhs) const</div><div class="ttdef"><b>Definition</b> <a href="#l00042">screen/color.cpp:42</a></div></div>
<div class="ttc" id="agroup__screen_html_a6259df4cdd9a7cae286f46a471e9afa5"><div class="ttname"><a href="group__screen.html#a6259df4cdd9a7cae286f46a471e9afa5">ftxui::ColorInfo::index_16</a></div><div class="ttdeci">uint8_t index_16</div><div class="ttdef"><b>Definition</b> <a href="color__info_8hpp_source.html#l00019">color_info.hpp:19</a></div></div>
<div class="ttc" id="agroup__screen_html_a66275ebe4681464e082660fa6be9ba28"><div class="ttname"><a href="group__screen.html#a66275ebe4681464e082660fa6be9ba28">ftxui::Color::operator==</a></div><div class="ttdeci">bool operator==(const Color &amp;rhs) const</div><div class="ttdef"><b>Definition</b> <a href="#l00037">screen/color.cpp:37</a></div></div>
<div class="ttc" id="agroup__screen_html_a90d21fa503b626c00cdc8d94863d5877"><div class="ttname"><a href="group__screen.html#a90d21fa503b626c00cdc8d94863d5877">ftxui::ColorInfo::green</a></div><div class="ttdeci">uint8_t green</div><div class="ttdef"><b>Definition</b> <a href="color__info_8hpp_source.html#l00021">color_info.hpp:21</a></div></div>
<div class="ttc" id="agroup__screen_html_aa4be56f94fc180d7b070df23c235b0c7"><div class="ttname"><a href="group__screen.html#aa4be56f94fc180d7b070df23c235b0c7">ftxui::Color::Palette1</a></div><div class="ttdeci">Palette1</div><div class="ttdef"><b>Definition</b> <a href="color_8hpp_source.html#l00049">color.hpp:49</a></div></div>
<div class="ttc" id="agroup__screen_html_aacec69e0aa1063fbec2cc305e7b076dd"><div class="ttname"><a href="group__screen.html#aacec69e0aa1063fbec2cc305e7b076dd">ftxui::Color::RGB</a></div><div class="ttdeci">static Color RGB(uint8_t red, uint8_t green, uint8_t blue)</div><div class="ttdoc">Build a Color from its RGB representation. https://en.wikipedia.org/wiki/RGB_color_model.</div><div class="ttdef"><b>Definition</b> <a href="#l00147">screen/color.cpp:147</a></div></div>
<div class="ttc" id="agroup__screen_html_abd07c48f62cc507fafa2486a43130fcf"><div class="ttname"><a href="group__screen.html#abd07c48f62cc507fafa2486a43130fcf">ftxui::Color::Palette256</a></div><div class="ttdeci">Palette256</div><div class="ttdef"><b>Definition</b> <a href="color_8hpp_source.html#l00072">color.hpp:72</a></div></div>
<div class="ttc" id="agroup__screen_html_acfe358aa128835387b6c2b7ffe22bab5"><div class="ttname"><a href="group__screen.html#acfe358aa128835387b6c2b7ffe22bab5">ftxui::Color::Print</a></div><div class="ttdeci">std::string Print(bool is_background_color) const</div><div class="ttdef"><b>Definition</b> <a href="#l00046">screen/color.cpp:46</a></div></div>
<div class="ttc" id="agroup__screen_html_ad47d918910aaa51c73160ac85999d09c"><div class="ttname"><a href="group__screen.html#ad47d918910aaa51c73160ac85999d09c">ftxui::ColorInfo::red</a></div><div class="ttdeci">uint8_t red</div><div class="ttdef"><b>Definition</b> <a href="color__info_8hpp_source.html#l00020">color_info.hpp:20</a></div></div>
<div class="ttc" id="agroup__screen_html_ae2b6d9670960e89c66d7b76167a0802f"><div class="ttname"><a href="group__screen.html#ae2b6d9670960e89c66d7b76167a0802f">ftxui::Color::Palette16</a></div><div class="ttdeci">Palette16</div><div class="ttdef"><b>Definition</b> <a href="color_8hpp_source.html#l00053">color.hpp:53</a></div></div>
<div class="ttc" id="agroup__screen_html_ae5d82c5fbae4f6561c9471c11c0a461b"><div class="ttname"><a href="group__screen.html#ae5d82c5fbae4f6561c9471c11c0a461b">ftxui::Color::Interpolate</a></div><div class="ttdeci">static Color Interpolate(float t, const Color &amp;a, const Color &amp;b)</div><div class="ttdef"><b>Definition</b> <a href="#l00203">screen/color.cpp:203</a></div></div>
<div class="ttc" id="agroup__screen_html_af067d3410c55684d727aeb29bc8d2af2"><div class="ttname"><a href="group__screen.html#af067d3410c55684d727aeb29bc8d2af2">ftxui::Color::HSVA</a></div><div class="ttdeci">static Color HSVA(uint8_t hue, uint8_t saturation, uint8_t value, uint8_t alpha)</div><div class="ttdoc">Build a Color from its HSV representation. https://en.wikipedia.org/wiki/HSL_and_HSV.</div><div class="ttdef"><b>Definition</b> <a href="#l00171">screen/color.cpp:171</a></div></div>
<div class="ttc" id="agroup__screen_html_classftxui_1_1Color"><div class="ttname"><a href="group__screen.html#classftxui_1_1Color">ftxui::Color</a></div><div class="ttdoc">Color is a class that represents a color in the terminal user interface.</div><div class="ttdef"><b>Definition</b> <a href="color_8hpp_source.html#l00022">color.hpp:22</a></div></div>
<div class="ttc" id="agroup__screen_html_ggab87bacfdad76e61b9412d7124be44c1ca7afd9568e82d523c91b2bfe0cc47be29"><div class="ttname"><a href="group__screen.html#ggab87bacfdad76e61b9412d7124be44c1ca7afd9568e82d523c91b2bfe0cc47be29">ftxui::Terminal::TrueColor</a></div><div class="ttdeci">@ TrueColor</div><div class="ttdef"><b>Definition</b> <a href="terminal_8hpp_source.html#l00027">terminal.hpp:27</a></div></div>
<div class="ttc" id="agroup__screen_html_ggab87bacfdad76e61b9412d7124be44c1ca7b88ab2a5c8fe8866c96ea4acb623876"><div class="ttname"><a href="group__screen.html#ggab87bacfdad76e61b9412d7124be44c1ca7b88ab2a5c8fe8866c96ea4acb623876">ftxui::Terminal::Palette256</a></div><div class="ttdeci">@ Palette256</div><div class="ttdef"><b>Definition</b> <a href="terminal_8hpp_source.html#l00026">terminal.hpp:26</a></div></div>
<div class="ttc" id="agroup__screen_html_structftxui_1_1ColorInfo"><div class="ttname"><a href="group__screen.html#structftxui_1_1ColorInfo">ftxui::ColorInfo</a></div><div class="ttdoc">ColorInfo is a structure that contains information about the terminal color palette.</div><div class="ttdef"><b>Definition</b> <a href="color__info_8hpp_source.html#l00016">color_info.hpp:16</a></div></div>
<div class="ttc" id="anamespaceftxui_html"><div class="ttname"><a href="namespaceftxui.html">ftxui</a></div><div class="ttdoc">The FTXUI ftxui:: namespace.</div><div class="ttdef"><b>Definition</b> <a href="animation_8hpp_source.html#l00010">animation.hpp:10</a></div></div>
<div class="ttc" id="anamespaceftxui_html_a883a81f30fb771a82f6c87b77ac3658e"><div class="ttname"><a href="namespaceftxui.html#a883a81f30fb771a82f6c87b77ac3658e">ftxui::GetColorInfo</a></div><div class="ttdeci">ColorInfo GetColorInfo(Color::Palette256 index)</div><div class="ttdef"><b>Definition</b> <a href="color__info_8cpp_source.html#l00272">color_info.cpp:272</a></div></div>
<div class="ttc" id="aterminal_8hpp_html"><div class="ttname"><a href="terminal_8hpp.html">terminal.hpp</a></div></div>
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