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<li class="toctree-l4"><a class="reference internal" href="#std.MaskedMerge"><code class="docutils literal notranslate"><span class="pre">MaskedMerge()</span></code></a></li>
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<section id="maskedmerge">
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<h1>MaskedMerge<a class="headerlink" href="#maskedmerge" title="Permalink to this heading"></a></h1>
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<dl class="py function">
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<dt class="sig sig-object py" id="std.MaskedMerge">
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<span class="sig-prename descclassname"><span class="pre">std.</span></span><span class="sig-name descname"><span class="pre">MaskedMerge</span></span><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">vnode</span> <span class="pre">clipa</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">vnode</span> <span class="pre">clipb</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">vnode</span> <span class="pre">mask</span></span></em><span class="optional">[</span>, <em class="sig-param"><span class="n"><span class="pre">int[]</span> <span class="pre">planes</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">bint</span> <span class="pre">first_plane=0</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">bint</span> <span class="pre">premultiplied=0</span></span></em><span class="optional">]</span><span class="sig-paren">)</span><a class="headerlink" href="#std.MaskedMerge" title="Permalink to this definition"></a></dt>
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<dd><p>MaskedMerge merges <em>clipa</em> with <em>clipb</em> using the per pixel weights in the <em>mask</em>,
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where 0 means that <em>clipa</em> is returned unchanged.
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The <em>mask</em> clip is assumed to be full range for all planes and in the
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0-1 interval for float formats regardless of the colorspace.
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||
If <em>mask</em> is a grayscale clip or if <em>first_plane</em> is true, the mask’s first
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||
plane will be used as the mask for merging all planes. The mask will be
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bilinearly resized if necessary.</p>
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<p>If <em>premultiplied</em> is set the blending is performed as if <em>clipb</em> has been pre-multiplied
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with alpha. In pre-multiplied mode it is an error to try to merge two frames with
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mismatched full and limited range since it will most likely cause horrible unintended
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color shifts. In the other mode it’s just a very, very bad idea.</p>
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<p>By default all planes will be
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processed, but it is also possible to specify a list of the <em>planes</em> to merge
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in the output. The unprocessed planes will be copied from the first clip.</p>
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<p><em>clipa</em> and <em>clipb</em> must have the same dimensions and format, and the <em>mask</em> must be the
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same format as the clips or the grayscale equivalent.</p>
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<p>How to apply a mask to the first plane:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">MaskedMerge</span><span class="p">(</span><span class="n">clipa</span><span class="o">=</span><span class="n">A</span><span class="p">,</span> <span class="n">clipb</span><span class="o">=</span><span class="n">B</span><span class="p">,</span> <span class="n">mask</span><span class="o">=</span><span class="n">Mask</span><span class="p">,</span> <span class="n">planes</span><span class="o">=</span><span class="mi">0</span><span class="p">)</span>
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</pre></div>
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</div>
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<p>How to apply the first plane of a mask to the second and third plane:</p>
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<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">MaskedMerge</span><span class="p">(</span><span class="n">clipa</span><span class="o">=</span><span class="n">A</span><span class="p">,</span> <span class="n">clipb</span><span class="o">=</span><span class="n">B</span><span class="p">,</span> <span class="n">mask</span><span class="o">=</span><span class="n">Mask</span><span class="p">,</span> <span class="n">planes</span><span class="o">=</span><span class="p">[</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">],</span> <span class="n">first_plane</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
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<p>The frame properties are copied from <em>clipa</em>.</p>
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