scrawl-canvas
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Version 8.9.4 - 19 Nov 2022
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</div>
</div>
</li>
</ul>
<ul class="sections">
<li id="section-1">
<div class="annotation">
<div class="sswrap ">
<a class="ss" href="#section-1">§</a>
</div>
<h1 id="demo-canvas-007">Demo Canvas 007</h1>
<p>Apply filters at the entity, group and cell level</p>
</div>
</li>
<li id="section-2">
<div class="annotation">
<div class="sswrap ">
<a class="ss" href="#section-2">§</a>
</div>
<p><a href="../../demo/canvas-007.html">Run code</a></p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-keyword">import</span> {
addNativeListener,
importDomImage,
library <span class="hljs-keyword">as</span> L,
makeBlock,
makeFilter,
makeGradient,
makeNoiseAsset,
makePicture,
makeRender,
makeWheel,
} <span class="hljs-keyword">from</span> <span class="hljs-string">'../source/scrawl.js'</span>;
<span class="hljs-keyword">import</span> { reportSpeed } <span class="hljs-keyword">from</span> <span class="hljs-string">'./utilities.js'</span>;</pre></div></div>
</li>
<li id="section-3">
<div class="annotation">
<div class="sswrap ">
<a class="ss" href="#section-3">§</a>
</div>
<h4 id="scene-setup">Scene setup</h4>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-keyword">let</span> canvas = L.<span class="hljs-property">artefact</span>.<span class="hljs-property">mycanvas</span>;
<span class="hljs-title function_">importDomImage</span>(<span class="hljs-string">'.filter-image'</span>);
<span class="hljs-keyword">let</span> myGrad = <span class="hljs-title function_">makeGradient</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'linear1'</span>,
<span class="hljs-attr">endX</span>: <span class="hljs-string">'100%'</span>,
<span class="hljs-attr">colors</span>: [
[<span class="hljs-number">0</span>, <span class="hljs-string">'pink'</span>],
[<span class="hljs-number">999</span>, <span class="hljs-string">'darkgreen'</span>]
],
}).<span class="hljs-title function_">clone</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'linear2'</span>,
<span class="hljs-attr">colors</span>: [
[<span class="hljs-number">0</span>, <span class="hljs-string">'darkblue'</span>],
[<span class="hljs-number">999</span>, <span class="hljs-string">'white'</span>]
],
}).<span class="hljs-title function_">clone</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'linear3'</span>,
<span class="hljs-attr">colors</span>: [
[<span class="hljs-number">0</span>, <span class="hljs-string">'yellow'</span>],
[<span class="hljs-number">999</span>, <span class="hljs-string">'purple'</span>]
],
}).<span class="hljs-title function_">clone</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'linear4'</span>,
<span class="hljs-attr">colors</span>: [
[<span class="hljs-number">0</span>, <span class="hljs-string">'black'</span>],
[<span class="hljs-number">999</span>, <span class="hljs-string">'coral'</span>]
],
});</pre></div></div>
</li>
<li id="section-4">
<div class="annotation">
<div class="sswrap ">
<a class="ss" href="#section-4">§</a>
</div>
<p>Create entitys</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-keyword">let</span> block1 = <span class="hljs-title function_">makeBlock</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'b1'</span>,
<span class="hljs-attr">width</span>: <span class="hljs-string">'70%'</span>,
<span class="hljs-attr">height</span>: <span class="hljs-string">'70%'</span>,
<span class="hljs-attr">startX</span>: <span class="hljs-string">'5%'</span>,
<span class="hljs-attr">startY</span>: <span class="hljs-string">'5%'</span>,
<span class="hljs-attr">fillStyle</span>: <span class="hljs-string">'linear1'</span>,
<span class="hljs-attr">lockFillStyleToEntity</span>: <span class="hljs-literal">true</span>,
<span class="hljs-attr">strokeStyle</span>: <span class="hljs-string">'coral'</span>,
<span class="hljs-attr">lineWidth</span>: <span class="hljs-number">4</span>,
<span class="hljs-attr">method</span>: <span class="hljs-string">'fillAndDraw'</span>,
<span class="hljs-attr">memoizeFilterOutput</span>: <span class="hljs-literal">true</span>,
});
<span class="hljs-keyword">let</span> block2 = block1.<span class="hljs-title function_">clone</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'b2'</span>,
<span class="hljs-attr">startX</span>: <span class="hljs-string">'45%'</span>,
<span class="hljs-attr">startY</span>: <span class="hljs-string">'47%'</span>,
<span class="hljs-attr">handleX</span>: <span class="hljs-string">'center'</span>,
<span class="hljs-attr">handleY</span>: <span class="hljs-string">'center'</span>,
<span class="hljs-attr">scale</span>: <span class="hljs-number">0.5</span>,
<span class="hljs-attr">fillStyle</span>: <span class="hljs-string">'linear2'</span>,
<span class="hljs-attr">strokeStyle</span>: <span class="hljs-string">'red'</span>,
<span class="hljs-attr">delta</span>: {
<span class="hljs-attr">roll</span>: -<span class="hljs-number">0.5</span>
},
<span class="hljs-attr">order</span>: <span class="hljs-number">1</span>,
<span class="hljs-attr">memoizeFilterOutput</span>: <span class="hljs-literal">false</span>,
});
<span class="hljs-keyword">let</span> wheel1 = <span class="hljs-title function_">makeWheel</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'w1'</span>,
<span class="hljs-attr">radius</span>: <span class="hljs-string">'20%'</span>,
<span class="hljs-attr">startX</span>: <span class="hljs-string">'70%'</span>,
<span class="hljs-attr">startY</span>: <span class="hljs-string">'30%'</span>,
<span class="hljs-attr">handleX</span>: <span class="hljs-string">'center'</span>,
<span class="hljs-attr">handleY</span>: <span class="hljs-string">'center'</span>,
<span class="hljs-attr">fillStyle</span>: <span class="hljs-string">'linear3'</span>,
<span class="hljs-attr">lockFillStyleToEntity</span>: <span class="hljs-literal">true</span>,
<span class="hljs-attr">strokeStyle</span>: <span class="hljs-string">'orange'</span>,
<span class="hljs-attr">lineWidth</span>: <span class="hljs-number">4</span>,
<span class="hljs-attr">method</span>: <span class="hljs-string">'fillAndDraw'</span>,
<span class="hljs-attr">memoizeFilterOutput</span>: <span class="hljs-literal">true</span>,
});
<span class="hljs-keyword">let</span> wheel2 = wheel1.<span class="hljs-title function_">clone</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'w2'</span>,
<span class="hljs-attr">startX</span>: <span class="hljs-string">'32%'</span>,
<span class="hljs-attr">startY</span>: <span class="hljs-string">'82%'</span>,
<span class="hljs-attr">handleX</span>: <span class="hljs-string">'15%'</span>,
<span class="hljs-attr">handleY</span>: <span class="hljs-string">'center'</span>,
<span class="hljs-attr">scale</span>: <span class="hljs-number">0.7</span>,
<span class="hljs-attr">fillStyle</span>: <span class="hljs-string">'linear4'</span>,
<span class="hljs-attr">strokeStyle</span>: <span class="hljs-string">'lightblue'</span>,
<span class="hljs-attr">delta</span>: {
<span class="hljs-attr">roll</span>: <span class="hljs-number">1</span>
},
<span class="hljs-attr">order</span>: <span class="hljs-number">1</span>,
<span class="hljs-attr">memoizeFilterOutput</span>: <span class="hljs-literal">false</span>,
});</pre></div></div>
</li>
<li id="section-5">
<div class="annotation">
<div class="sswrap ">
<a class="ss" href="#section-5">§</a>
</div>
<p>Define filters - need to test them all, plus some user-defined filters</p>
</div>
<div class="content"><div class='highlight'><pre>
<span class="hljs-title function_">makeNoiseAsset</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'my-noise-generator'</span>,
<span class="hljs-attr">width</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">height</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">scale</span>: <span class="hljs-number">60</span>,
<span class="hljs-attr">sumFunction</span>: <span class="hljs-string">'modular'</span>,
<span class="hljs-attr">sumAmplitude</span>: <span class="hljs-number">4</span>,
<span class="hljs-attr">noiseEngine</span>: <span class="hljs-string">'worley-manhattan'</span>,
});</pre></div></div>
</li>
<li id="section-6">
<div class="annotation">
<div class="sswrap ">
<a class="ss" href="#section-6">§</a>
</div>
<p>Required, otherwise the asset generator doesn’t produce anything for the filter</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-title function_">makePicture</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'temp-1'</span>,
<span class="hljs-attr">asset</span>: <span class="hljs-string">'my-noise-generator'</span>,
<span class="hljs-attr">dimensions</span>: [<span class="hljs-number">100</span>, <span class="hljs-number">100</span>],
<span class="hljs-attr">copyDimensions</span>: [<span class="hljs-string">'100%'</span>, <span class="hljs-string">'100%'</span>],
<span class="hljs-attr">method</span>: <span class="hljs-string">'none'</span>,
});
<span class="hljs-title function_">makePicture</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'temp-2'</span>,
<span class="hljs-attr">asset</span>: <span class="hljs-string">'iris'</span>,
<span class="hljs-attr">dimensions</span>: [<span class="hljs-number">400</span>, <span class="hljs-number">400</span>],
<span class="hljs-attr">copyDimensions</span>: [<span class="hljs-string">'100%'</span>, <span class="hljs-string">'100%'</span>],
<span class="hljs-attr">method</span>: <span class="hljs-string">'none'</span>,
});</pre></div></div>
</li>
<li id="section-7">
<div class="annotation">
<div class="sswrap ">
<a class="ss" href="#section-7">§</a>
</div>
<p><strong>Displace</strong> filter</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-title function_">makeFilter</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'displace'</span>,
<span class="hljs-attr">actions</span>: [
{
<span class="hljs-attr">action</span>: <span class="hljs-string">'process-image'</span>,
<span class="hljs-attr">asset</span>: <span class="hljs-string">'my-noise-generator'</span>,
<span class="hljs-attr">width</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">height</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">copyWidth</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">copyHeight</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">lineOut</span>: <span class="hljs-string">'noise-map'</span>,
},
{
<span class="hljs-attr">action</span>: <span class="hljs-string">'displace'</span>,
<span class="hljs-attr">lineMix</span>: <span class="hljs-string">'noise-map'</span>,
<span class="hljs-attr">scaleX</span>: <span class="hljs-number">3</span>,
<span class="hljs-attr">scaleY</span>: <span class="hljs-number">3</span>,
<span class="hljs-attr">transparentEdges</span>: <span class="hljs-literal">true</span>,
}
],
});</pre></div></div>
</li>
<li id="section-8">
<div class="annotation">
<div class="sswrap ">
<a class="ss" href="#section-8">§</a>
</div>
<p><strong>Blend</strong> filter</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-title function_">makeFilter</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'blend'</span>,
<span class="hljs-attr">actions</span>: [
{
<span class="hljs-attr">action</span>: <span class="hljs-string">'process-image'</span>,
<span class="hljs-attr">asset</span>: <span class="hljs-string">'iris'</span>,
<span class="hljs-attr">width</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">height</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">copyWidth</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">copyHeight</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">lineOut</span>: <span class="hljs-string">'flower'</span>,
},
{
<span class="hljs-attr">action</span>: <span class="hljs-string">'blend'</span>,
<span class="hljs-attr">lineMix</span>: <span class="hljs-string">'flower'</span>,
<span class="hljs-attr">blend</span>: <span class="hljs-string">'color-burn'</span>,
}
],
});</pre></div></div>
</li>
<li id="section-9">
<div class="annotation">
<div class="sswrap ">
<a class="ss" href="#section-9">§</a>
</div>
<p><strong>Compose</strong> filter</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-title function_">makeFilter</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'compose'</span>,
<span class="hljs-attr">actions</span>: [
{
<span class="hljs-attr">action</span>: <span class="hljs-string">'process-image'</span>,
<span class="hljs-attr">asset</span>: <span class="hljs-string">'iris'</span>,
<span class="hljs-attr">width</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">height</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">copyWidth</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">copyHeight</span>: <span class="hljs-number">400</span>,
<span class="hljs-attr">lineOut</span>: <span class="hljs-string">'flower'</span>,
},
{
<span class="hljs-attr">action</span>: <span class="hljs-string">'compose'</span>,
<span class="hljs-attr">lineMix</span>: <span class="hljs-string">'flower'</span>,
<span class="hljs-attr">offsetX</span>: <span class="hljs-number">5</span>,
<span class="hljs-attr">compose</span>: <span class="hljs-string">'destination-in'</span>,
}
],
});</pre></div></div>
</li>
<li id="section-10">
<div class="annotation">
<div class="sswrap ">
<a class="ss" href="#section-10">§</a>
</div>
<p><strong>Gray</strong> filter</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-title function_">makeFilter</span>({
<span class="hljs-attr">name</span>: <span class="hljs-string">'gray'</span>,
<span class="hljs-attr">method</span>: <span class="hljs-string">'gray'</span>,</pre></div></div>
</li>
<li id="section-11">
<div class="annotation">
<div class="sswrap ">
<a class="ss" href="#section-11">§</a>
</div>
<p><strong>Grayscale</strong> filter</p>
</div>
<div class="content"><div class='highlight'><pre>}).<span class="hljs-ti