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<div class="title">rect.hpp</div> </div>
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<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160; </div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="preprocessor">#include &lt;algorithm&gt;</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="preprocessor">#include &lt;cstdint&gt;</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160; </div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="preprocessor">#include &quot;point.hpp&quot;</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="preprocessor">#include &quot;size.hpp&quot;</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160; </div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceblit.html">blit</a> {</div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160; </div>
<div class="line"><a name="l00011"></a><span class="lineno"><a class="line" href="structblit_1_1Rect.html"> 11</a></span>&#160; <span class="keyword">struct </span><a class="code" href="structblit_1_1Rect.html">Rect</a> {</div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160; </div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160; int32_t x = 0, y = 0, w = 0, h = 0;</div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160; </div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160; <a class="code" href="structblit_1_1Rect.html">Rect</a>() = <span class="keywordflow">default</span>;</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160; constexpr <a class="code" href="structblit_1_1Rect.html">Rect</a>(<a class="code" href="structblit_1_1Point.html">Point</a> tl, <a class="code" href="structblit_1_1Point.html">Point</a> br) : x(tl.x), y(tl.y), w(br.x - tl.x), h(br.y - tl.y) {}</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160; constexpr <a class="code" href="structblit_1_1Rect.html">Rect</a>(<a class="code" href="structblit_1_1Point.html">Point</a> tl, <a class="code" href="structblit_1_1Size.html">Size</a> s) : x(tl.x), y(tl.y), w(s.w), h(s.h) {}</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160; constexpr <a class="code" href="structblit_1_1Rect.html">Rect</a>(int32_t x, int32_t y, int32_t w, int32_t h) : x(x), y(y), w(w), h(h) {}</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; </div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160; <span class="keyword">inline</span> <a class="code" href="structblit_1_1Rect.html">Rect</a>&amp; operator*= (<span class="keyword">const</span> <span class="keywordtype">float</span> a) { x = <span class="keyword">static_cast&lt;</span>int32_t<span class="keyword">&gt;</span>(x * a); y = <span class="keyword">static_cast&lt;</span>int32_t<span class="keyword">&gt;</span>(y * a); w = <span class="keyword">static_cast&lt;</span>int32_t<span class="keyword">&gt;</span>(w * a); h = <span class="keyword">static_cast&lt;</span>int32_t<span class="keyword">&gt;</span>(h * a); <span class="keywordflow">return</span> *<span class="keyword">this</span>; }</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160; </div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; <a class="code" href="structblit_1_1Size.html">Size</a> size()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; <span class="keywordflow">return</span> <a class="code" href="structblit_1_1Size.html">Size</a>(w, h);</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160; }</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; </div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; <span class="keywordtype">bool</span> empty()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; <span class="keywordflow">return</span> w &lt;= 0 || h &lt;= 0;</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; }</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160; </div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; <span class="keywordtype">bool</span> contains(<span class="keyword">const</span> <a class="code" href="structblit_1_1Point.html">Point</a> &amp;p)<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; <span class="keywordflow">return</span> p.x &gt;= x &amp;&amp; p.y &gt;= y &amp;&amp; p.x &lt; x + w &amp;&amp; p.y &lt; y + h;</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; }</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; </div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; <span class="keywordtype">bool</span> contains(<span class="keyword">const</span> <a class="code" href="structblit_1_1Rect.html">Rect</a> &amp;p)<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <span class="keywordflow">return</span> p.x &gt;= x &amp;&amp; p.y &gt;= y &amp;&amp; p.x + p.w &lt; x + w &amp;&amp; p.y + p.h &lt; y + h;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; }</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; <span class="keywordtype">bool</span> intersects(<span class="keyword">const</span> <a class="code" href="structblit_1_1Rect.html">Rect</a> &amp;r)<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <span class="keywordflow">return</span> !(x &gt; r.x + r.w || x + w &lt; r.x || y &gt; r.y + r.h || y + h &lt; r.y);</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; }</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; </div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <a class="code" href="structblit_1_1Rect.html">Rect</a> intersection(<span class="keyword">const</span> <a class="code" href="structblit_1_1Rect.html">Rect</a> &amp;r)<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="keywordflow">return</span> <a class="code" href="structblit_1_1Rect.html">Rect</a>(</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160; std::max(x, r.x),</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; std::max(y, r.y),</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; std::min(x + w, r.x + r.w) - std::max(x, r.x),</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; std::min(y + h, r.y + r.h) - std::max(y, r.y));</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; }</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; </div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="comment">// TODO: hate this function name</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <span class="comment">//</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; <span class="comment">// clips a destination rect to fit into the clipping rectangle</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="comment">// also offsets and scales the src rect equivalently.</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; <span class="comment">// modifies the supplied src/dest rects</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="comment">//</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="comment">// user should check if dest is empty (in which case src is</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="comment">// not modified) to determine if intersection occurred</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="comment">//</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="comment">// usage: clip.clip_src_dest(src, dest)</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="comment">//</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <span class="comment">// !! ouch, this description is poor.</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="comment">/* void clip_src_dest(rect &amp;src, rect &amp;dest) {</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;<span class="comment"> rect cdr = intersection(dest); // clipped destination rect</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;<span class="comment"> if (cdr.empty())</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;<span class="comment"> return; // after clipping there is nothing to draw</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;<span class="comment"> float sx = (src.w) / float(dest.w);</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;<span class="comment"> float sy = (src.h) / float(dest.h);</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;<span class="comment"> // offset source rect to accommodate for clipped destination rect</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;<span class="comment"> uint8_t l = cdr.x - dest.x; // top left corner</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160;<span class="comment"> uint8_t t = cdr.y - dest.y;</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;<span class="comment"> src.x += (sx * l);</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;<span class="comment"> src.y += (sy * t);</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160;<span class="comment"> uint8_t w = cdr.w - dest.w;</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;<span class="comment"> uint8_t h = cdr.h - dest.h;</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;<span class="comment"> src.w = cdr.w * sx;</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;<span class="comment"> src.h = cdr.h * sy;</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;<span class="comment"> }*/</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <span class="keywordtype">void</span> deflate(int32_t v) {</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; x += v;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; y += v;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; w -= 2 * v;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; h -= 2 * v;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; }</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; </div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keywordtype">void</span> inflate(int32_t v) {</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; x -= v;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; y -= v;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; w += 2 * v;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; h += 2 * v;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; }</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; </div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; <a class="code" href="structblit_1_1Point.html">Point</a> clamp(<a class="code" href="structblit_1_1Point.html">Point</a> p)<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; <span class="keywordflow">return</span> <a class="code" href="structblit_1_1Point.html">Point</a>(</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; p.x &lt; x ? x : (p.x &gt; x + w ? x + w : p.x),</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; p.y &lt; y ? y : (p.y &gt; y + h ? y + h : p.y));</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; }</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; </div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; <a class="code" href="structblit_1_1Point.html">Point</a> tl()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; <span class="keywordflow">return</span> <a class="code" href="structblit_1_1Point.html">Point</a>(x, y);</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; }</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; </div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; <a class="code" href="structblit_1_1Point.html">Point</a> tr()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; <span class="keywordflow">return</span> <a class="code" href="structblit_1_1Point.html">Point</a>(x + w, y);</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; }</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; </div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; <a class="code" href="structblit_1_1Point.html">Point</a> bl()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; <span class="keywordflow">return</span> <a class="code" href="structblit_1_1Point.html">Point</a>(x, y + h);</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; }</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; <a class="code" href="structblit_1_1Point.html">Point</a> br()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; <span class="keywordflow">return</span> <a class="code" href="structblit_1_1Point.html">Point</a>(x + w, y + h);</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; }</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; </div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; <a class="code" href="structblit_1_1Point.html">Point</a> center()<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; <span class="keywordflow">return</span> <a class="code" href="structblit_1_1Point.html">Point</a>(x + w/2, y + h/2);</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; }</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; </div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; };</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; </div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; <span class="keyword">inline</span> <a class="code" href="structblit_1_1Rect.html">Rect</a> operator* (<a class="code" href="structblit_1_1Rect.html">Rect</a> lhs, <span class="keyword">const</span> <span class="keywordtype">float</span> a) { lhs *= a; <span class="keywordflow">return</span> lhs; }</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">bool</span> operator== (<span class="keyword">const</span> Rect &amp;lhs, <span class="keyword">const</span> Rect &amp;rhs) { <span class="keywordflow">return</span> lhs.x == rhs.x &amp;&amp; lhs.y == rhs.y &amp;&amp; lhs.w == rhs.w &amp;&amp; lhs.h == rhs.h; }</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">bool</span> operator!= (<span class="keyword">const</span> Rect &amp;lhs, <span class="keyword">const</span> Rect &amp;rhs) { <span class="keywordflow">return</span> !(lhs == rhs); }</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160;}</div>
<div class="ttc" id="anamespaceblit_html"><div class="ttname"><a href="namespaceblit.html">blit</a></div><div class="ttdef"><b>Definition:</b> audio.cpp:10</div></div>
<div class="ttc" id="astructblit_1_1Point_html"><div class="ttname"><a href="structblit_1_1Point.html">blit::Point</a></div><div class="ttdef"><b>Definition:</b> point.hpp:10</div></div>
<div class="ttc" id="astructblit_1_1Rect_html"><div class="ttname"><a href="structblit_1_1Rect.html">blit::Rect</a></div><div class="ttdef"><b>Definition:</b> rect.hpp:11</div></div>
<div class="ttc" id="astructblit_1_1Size_html"><div class="ttname"><a href="structblit_1_1Size.html">blit::Size</a></div><div class="ttdef"><b>Definition:</b> size.hpp:9</div></div>
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