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<!DOCTYPE html> <html> <head> <title>util.coffee</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <link rel="stylesheet" media="all" href="docco.css" /> </head> <body> <div id="container"> <div id="background"></div> <div id="jump_to"> Jump To … <div id="jump_wrapper"> <div id="jump_page"> <a class="source" href="blackwhite.html"> blackwhite.coffee </a> <a class="source" href="brightnesscontrast.html"> brightnesscontrast.coffee </a> <a class="source" href="colorbalance.html"> colorbalance.coffee </a> <a class="source" href="curves.html"> curves.coffee </a> <a class="source" href="exposure.html"> exposure.coffee </a> <a class="source" href="gradient.html"> gradient.coffee </a> <a class="source" href="huesaturation.html"> huesaturation.coffee </a> <a class="source" href="invert.html"> invert.coffee </a> <a class="source" href="layereffect.html"> layereffect.coffee </a> <a class="source" href="levels.html"> levels.coffee </a> <a class="source" href="pattern.html"> pattern.coffee </a> <a class="source" href="photofilter.html"> photofilter.coffee </a> <a class="source" href="posterize.html"> posterize.coffee </a> <a class="source" href="selectivecolor.html"> selectivecolor.coffee </a> <a class="source" href="solidcolor.html"> solidcolor.coffee </a> <a class="source" href="threshold.html"> threshold.coffee </a> <a class="source" href="typetool.html"> typetool.coffee </a> <a class="source" href="vibrance.html"> vibrance.coffee </a> <a class="source" href="log.html"> log.coffee </a> <a class="source" href="psd.html"> psd.coffee </a> <a class="source" href="psdassert.html"> psdassert.coffee </a> <a class="source" href="psdchannelimage.html"> psdchannelimage.coffee </a> <a class="source" href="psdcolor.html"> psdcolor.coffee </a> <a class="source" href="psddescriptor.html"> psddescriptor.coffee </a> <a class="source" href="psdfile.html"> psdfile.coffee </a> <a class="source" href="psdheader.html"> psdheader.coffee </a> <a class="source" href="psdimage.html"> psdimage.coffee </a> <a class="source" href="psdlayer.html"> psdlayer.coffee </a> <a class="source" href="psdlayermask.html"> psdlayermask.coffee </a> <a class="source" href="psdresource.html"> psdresource.coffee </a> <a class="source" href="util.html"> util.coffee </a> </div> </div> </div> <table cellpadding="0" cellspacing="0"> <thead> <tr> <th class="docs"> <h1> util.coffee </h1> </th> <th class="code"> </th> </tr> </thead> <tbody> <tr id="section-1"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-1">¶</a> </div> <p>"Static" utility functions</p> </td> <td class="code"> <div class="highlight"><pre><span class="k">class</span> <span class="nx">Util</span>
<span class="vi">@pad2: </span><span class="nf">(i) -></span> <span class="nb">Math</span><span class="p">.</span><span class="nx">floor</span><span class="p">((</span><span class="nx">i</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span> <span class="o">/</span> <span class="mi">2</span><span class="p">)</span> <span class="o">*</span> <span class="mi">2</span>
<span class="vi">@pad4: </span><span class="nf">(i) -></span> <span class="nx">i</span> <span class="o">-</span> <span class="p">(</span><span class="nx">i</span> <span class="o">%</span> <span class="mi">4</span><span class="p">)</span> <span class="o">+</span> <span class="mi">3</span>
<span class="vi">@toUInt16: </span><span class="nf">(b1, b2) -></span> <span class="p">(</span><span class="nx">b1</span> <span class="o"><<</span> <span class="mi">8</span><span class="p">)</span> <span class="o">|</span> <span class="nx">b2</span>
<span class="vi">@toInt16: </span><span class="nf">(b1, b2) -></span>
<span class="nv">val = </span><span class="nx">@toUInt16</span><span class="p">(</span><span class="nx">b1</span><span class="p">,</span> <span class="nx">b2</span><span class="p">)</span>
<span class="k">if</span> <span class="nx">val</span> <span class="o">>=</span> <span class="mh">0x8000</span> <span class="k">then</span> <span class="nx">val</span> <span class="o">-</span> <span class="mh">0x10000</span> <span class="k">else</span> <span class="nx">val</span></pre></div> </td> </tr> <tr id="section-2"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-2">¶</a> </div> <p>Round a number to a specific number of significant figures.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="vi">@round: </span><span class="nf">(num, sigFig = 2) -></span>
<span class="k">return</span> <span class="nb">Math</span><span class="p">.</span><span class="nx">round</span><span class="p">(</span><span class="nx">num</span><span class="p">)</span> <span class="k">if</span> <span class="nx">sigFig</span> <span class="o">is</span> <span class="mi">0</span>
<span class="nv">mult = </span><span class="nb">Math</span><span class="p">.</span><span class="nx">pow</span><span class="p">(</span><span class="mi">10</span><span class="p">,</span> <span class="nx">sigFig</span><span class="p">)</span>
<span class="nb">Math</span><span class="p">.</span><span class="nx">round</span><span class="p">(</span><span class="nx">num</span> <span class="o">*</span> <span class="nx">mult</span><span class="p">)</span> <span class="o">/</span> <span class="nx">mult</span></pre></div> </td> </tr> <tr id="section-3"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-3">¶</a> </div> <p>Clamp a number between a maximum and minimum value.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="vi">@clamp: </span><span class="nf">(num, min = Number.MIN_VALUE, max = Number.MAX_VALUE) -></span>
<span class="k">if</span> <span class="k">typeof</span> <span class="nx">num</span> <span class="o">is</span> <span class="s2">"object"</span> <span class="o">and</span> <span class="nx">num</span><span class="p">.</span><span class="nx">length</span><span class="o">?</span>
<span class="nx">num</span><span class="p">[</span><span class="nx">i</span><span class="p">]</span> <span class="o">=</span> <span class="nb">Math</span><span class="p">.</span><span class="nx">max</span><span class="p">(</span><span class="nb">Math</span><span class="p">.</span><span class="nx">min</span><span class="p">(</span><span class="nx">val</span><span class="p">,</span> <span class="nx">max</span><span class="p">),</span> <span class="nx">min</span><span class="p">)</span> <span class="k">for</span> <span class="nx">val</span><span class="p">,</span> <span class="nx">i</span> <span class="k">in</span> <span class="nx">num</span>
<span class="k">else</span> <span class="k">if</span> <span class="k">typeof</span> <span class="nx">num</span> <span class="o">is</span> <span class="s2">"object"</span>
<span class="nx">num</span><span class="p">[</span><span class="nx">i</span><span class="p">]</span> <span class="o">=</span> <span class="nb">Math</span><span class="p">.</span><span class="nx">max</span><span class="p">(</span> <span class="nb">Math</span><span class="p">.</span><span class="nx">min</span><span class="p">(</span><span class="nx">val</span><span class="p">,</span> <span class="nx">max</span><span class="p">),</span> <span class="nx">min</span> <span class="p">)</span> <span class="k">for</span> <span class="nx">own</span> <span class="nx">i</span><span class="p">,</span> <span class="nx">val</span> <span class="k">of</span> <span class="nx">num</span>
<span class="k">else</span>
<span class="nv">num = </span><span class="nb">Math</span><span class="p">.</span><span class="nx">max</span><span class="p">(</span><span class="nb">Math</span><span class="p">.</span><span class="nx">min</span><span class="p">(</span><span class="nx">num</span><span class="p">,</span> <span class="nx">max</span><span class="p">),</span> <span class="nx">min</span><span class="p">)</span>
<span class="nx">num</span></pre></div> </td> </tr> <tr id="section-4"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-4">¶</a> </div> <p>Contributed by https://github.com/jrus</p> </td> <td class="code"> <div class="highlight"><pre> <span class="vi">@decodeMacroman = </span><span class="nx">do</span> <span class="o">-></span>
<span class="nv">high_chars_unicode = </span><span class="s1">'''</span>
<span class="s1"> \u00c4\u00c5\u00c7\u00c9\u00d1\u00d6\u00dc\u00e1</span>
<span class="s1"> \u00e0\u00e2\u00e4\u00e3\u00e5\u00e7\u00e9\u00e8</span>
<span class="s1"> \u00ea\u00eb\u00ed\u00ec\u00ee\u00ef\u00f1\u00f3</span>
<span class="s1"> \u00f2\u00f4\u00f6\u00f5\u00fa\u00f9\u00fb\u00fc</span>
<span class="s1"> \u2020\u00b0\u00a2\u00a3\u00a7\u2022\u00b6\u00df</span>
<span class="s1"> \u00ae\u00a9\u2122\u00b4\u00a8\u2260\u00c6\u00d8</span>
<span class="s1"> \u221e\u00b1\u2264\u2265\u00a5\u00b5\u2202\u2211</span>
<span class="s1"> \u220f\u03c0\u222b\u00aa\u00ba\u03a9\u00e6\u00f8</span>
<span class="s1"> \u00bf\u00a1\u00ac\u221a\u0192\u2248\u2206\u00ab</span>
<span class="s1"> \u00bb\u2026\u00a0\u00c0\u00c3\u00d5\u0152\u0153</span>
<span class="s1"> \u2013\u2014\u201c\u201d\u2018\u2019\u00f7\u25ca</span>
<span class="s1"> \u00ff\u0178\u2044\u20ac\u2039\u203a\ufb01\ufb02</span>
<span class="s1"> \u2021\u00b7\u201a\u201e\u2030\u00c2\u00ca\u00c1</span>
<span class="s1"> \u00cb\u00c8\u00cd\u00ce\u00cf\u00cc\u00d3\u00d4</span>
<span class="s1"> \uf8ff\u00d2\u00da\u00db\u00d9\u0131\u02c6\u02dc</span>
<span class="s1"> \u00af\u02d8\u02d9\u02da\u00b8\u02dd\u02db\u02c7</span>
<span class="s1"> '''</span><span class="p">.</span><span class="nx">replace</span> <span class="sr">/\n/g</span><span class="p">,</span> <span class="s1">''</span>
<span class="nf">(byte_array) -></span>
<span class="nv">char_array = </span><span class="k">for</span> <span class="nx">byte</span><span class="p">,</span> <span class="nx">idx</span> <span class="k">in</span> <span class="nx">byte_array</span>
<span class="k">if</span> <span class="nx">byte</span> <span class="o"><</span> <span class="mh">0x80</span> <span class="k">then</span> <span class="nb">String</span><span class="p">.</span><span class="nx">fromCharCode</span> <span class="nx">byte</span>
<span class="k">else</span> <span class="nx">high_chars_unicode</span><span class="p">.</span><span class="nx">charAt</span> <span class="nx">byte</span> <span class="o">-</span> <span class="mh">0x80</span>
<span class="nx">char_array</span><span class="p">.</span><span class="nx">join</span> <span class="s1">''</span>
</pre></div> </td> </tr> </tbody> </table> </div> </body> </html>
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