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fabric.Image.filters.Grayscale.html
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<!DOCTYPE html>
<html lang="en">
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<meta charset="utf-8">
<title>JSDoc: Class: Grayscale</title>
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<h2><a href="index.html">Home</a></h2><h3>Classes</h3><ul><li><a href="fabric.ActiveSelection.html">ActiveSelection</a></li><li><a href="fabric.BaseBrush.html">BaseBrush</a></li><li><a href="fabric.Canvas.html">Canvas</a></li><li><a href="fabric.Circle.html">Circle</a></li><li><a href="fabric.CircleBrush.html">CircleBrush</a></li><li><a href="fabric.Color.html">Color</a></li><li><a href="fabric.Ellipse.html">Ellipse</a></li><li><a href="fabric.Gradient.html">Gradient</a></li><li><a href="fabric.Group.html">Group</a></li><li><a href="fabric.Image.html">Image</a></li><li><a href="fabric.Image.filters.BaseFilter.html">BaseFilter</a></li><li><a href="fabric.Image.filters.Blur.html">Blur</a></li><li><a href="fabric.Image.filters.Brightness.html">Brightness</a></li><li><a href="fabric.Image.filters.ColorMatrix.html">ColorMatrix</a></li><li><a href="fabric.Image.filters.Contrast.html">Contrast</a></li><li><a href="fabric.Image.filters.Convolute.html">Convolute</a></li><li><a href="fabric.Image.filters.fabric.Image.filter.BlendColor.html">BlendColor</a></li><li><a href="fabric.Image.filters.fabric.Image.filter.BlendImage.html">BlendImage</a></li><li><a href="fabric.Image.filters.Gamma.html">Gamma</a></li><li><a href="fabric.Image.filters.Grayscale.html">Grayscale</a></li><li><a href="fabric.Image.filters.HueRotation.html">HueRotation</a></li><li><a href="fabric.Image.filters.Invert.html">Invert</a></li><li><a href="fabric.Image.filters.Noise.html">Noise</a></li><li><a href="fabric.Image.filters.Pixelate.html">Pixelate</a></li><li><a href="fabric.Image.filters.RemoveColor.html">RemoveColor</a></li><li><a href="fabric.Image.filters.Resize.html">Resize</a></li><li><a href="fabric.Image.filters.Saturation.html">Saturation</a></li><li><a href="fabric.Image.filters.Vibrance.html">Vibrance</a></li><li><a href="fabric.Intersection.html">Intersection</a></li><li><a href="fabric.IText.html">IText</a></li><li><a href="fabric.Line.html">Line</a></li><li><a href="fabric.Object.html">Object</a></li><li><a href="fabric.Path.html">Path</a></li><li><a href="fabric.Pattern.html">Pattern</a></li><li><a href="fabric.PatternBrush.html">PatternBrush</a></li><li><a href="fabric.PencilBrush.html">PencilBrush</a></li><li><a href="fabric.Point.html">Point</a></li><li><a href="fabric.Polygon.html">Polygon</a></li><li><a href="fabric.Polyline.html">Polyline</a></li><li><a href="fabric.Rect.html">Rect</a></li><li><a href="fabric.Shadow.html">Shadow</a></li><li><a href="fabric.SprayBrush.html">SprayBrush</a></li><li><a href="fabric.StaticCanvas.html">StaticCanvas</a></li><li><a href="fabric.Text.html">Text</a></li><li><a href="fabric.Textbox.html">Textbox</a></li><li><a href="fabric.Triangle.html">Triangle</a></li></ul><h3>Namespaces</h3><ul><li><a href="fabric.html">fabric</a></li><li><a href="fabric.Collection.html">Collection</a></li><li><a href="fabric.CommonMethods.html">CommonMethods</a></li><li><a href="fabric.Image.filters.html">filters</a></li><li><a href="fabric.Observable.html">Observable</a></li><li><a href="fabric.util.html">util</a></li><li><a href="fabric.util.array.html">array</a></li><li><a href="fabric.util.ease.html">ease</a></li><li><a href="fabric.util.object.html">object</a></li><li><a href="fabric.util.string.html">string</a></li></ul><h3>Global</h3><ul><li><a href="global.html#__cachedLines">__cachedLines</a></li><li><a href="global.html#_splitTextIntoLines">_splitTextIntoLines</a></li><li><a href="global.html#_wrapLine">_wrapLine</a></li><li><a href="global.html#_wrapText">_wrapText</a></li><li><a href="global.html#applyFilters">applyFilters</a></li><li><a href="global.html#cancelAll">cancelAll</a></li><li><a href="global.html#cancelByCanvas">cancelByCanvas</a></li><li><a href="global.html#cancelByTarget">cancelByTarget</a></li><li><a href="global.html#copyGLTo2DDrawImage">copyGLTo2DDrawImage</a></li><li><a href="global.html#copyGLTo2DPutImageData">copyGLTo2DPutImageData</a></li><li><a href="global.html#dynamicMinWidth">dynamicMinWidth</a></li><li><a href="global.html#findAnimation">findAnimation</a></li><li><a href="global.html#findAnimationIndex">findAnimationIndex</a></li><li><a href="global.html#findAnimationsByTarget">findAnimationsByTarget</a></li><li><a href="global.html#isEmptyStyles">isEmptyStyles</a></li><li><a href="global.html#isEndOfWrapping">isEndOfWrapping</a></li><li><a href="global.html#lockScalingFlip">lockScalingFlip</a></li><li><a href="global.html#minWidth">minWidth</a></li><li><a href="global.html#missingNewlineOffset">missingNewlineOffset</a></li><li><a href="global.html#noScaleCache">noScaleCache</a></li><li><a href="global.html#splitByGrapheme">splitByGrapheme</a></li><li><a href="global.html#styleHas">styleHas</a></li><li><a href="global.html#toObject">toObject</a></li><li><a href="global.html#type">type</a></li></ul>
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<div id="main">
<h1 class="page-title">Class: Grayscale</h1>
<section>
<header>
<h2>
<span class="ancestors"><a href="fabric.html">fabric</a><a href="fabric.Image.html">.Image</a><a href="fabric.Image.filters.html">.filters</a>.</span>Grayscale</h2>
</header>
<article>
<div class="container-overview">
<h4 class="name" id="Grayscale"><a href="#Grayscale" ><span class="type-signature"></span>new Grayscale<span class="signature">()</span><span class="type-signature"></span></a></h4>
<div class="description">
Grayscale image filter class
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line23052">line 23052</a>
</li></ul></dd>
<dt class="tag-see">See:</dt>
<dd class="tag-see">
<ul>
<li><a href="http://fabricjs.com/image-filters">ImageFilters demo</a></li>
</ul>
</dd>
</dl>
<h5>Example</h5>
<pre class="prettyprint"><code>var filter = new fabric.Image.filters.Grayscale();
object.filters.push(filter);
object.applyFilters();</code></pre>
</div>
<h3 class="subsection-title">Extends</h3>
<ul>
<li><a href="fabric.Image.filters.BaseFilter.html">fabric.Image.filters.BaseFilter</a></li>
</ul>
<h3 class="subsection-title">Members</h3>
<h4 class="name" id="mode"><a href="#mode" ><span class="type-signature"></span>mode<span class="type-signature"></span></a></h4>
<div class="description">
Grayscale mode, between 'average', 'lightness', 'luminosity'
</div>
<dl class="details">
<dt class="tag-default">Default Value:</dt>
<dd class="tag-default"><ul class="dummy">
<li>average</li>
</ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line23107">line 23107</a>
</li></ul></dd>
</dl>
<h4 class="name" id="type"><a href="#type" ><span class="type-signature"></span>type<span class="type-signature"></span></a></h4>
<div class="description">
Filter type
</div>
<dl class="details">
<dt class="tag-overrides">Overrides:</dt>
<dd class="tag-overrides"><ul class="dummy"><li>
<a href="fabric.Image.filters.BaseFilter.html#type">fabric.Image.filters.BaseFilter#type</a>
</li></ul></dd>
<dt class="tag-default">Default Value:</dt>
<dd class="tag-default"><ul class="dummy">
<li>Grayscale</li>
</ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line23070">line 23070</a>
</li></ul></dd>
</dl>
<h3 class="subsection-title">Methods</h3>
<div class="inherited">
<h4 class="name" id="applyTo"><a href="#applyTo" ><span class="type-signature"></span>applyTo<span class="signature">(options)</span><span class="type-signature"></span></a></h4>
<div class="description">
Apply this filter to the input image data provided.
Determines whether to use WebGL or Canvas2D based on the options.webgl flag.
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>options</code></td>
<td class="type">
<span class="param-type">Object</span>
</td>
<td class="description last">
<h6>Properties</h6>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>passes</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="description last">The number of filters remaining to be executed</td>
</tr>
<tr>
<td class="name"><code>webgl</code></td>
<td class="type">
<span class="param-type">Boolean</span>
</td>
<td class="description last">Whether to use webgl to render the filter.</td>
</tr>
<tr>
<td class="name"><code>sourceTexture</code></td>
<td class="type">
<span class="param-type">WebGLTexture</span>
</td>
<td class="description last">The texture setup as the source to be filtered.</td>
</tr>
<tr>
<td class="name"><code>targetTexture</code></td>
<td class="type">
<span class="param-type">WebGLTexture</span>
</td>
<td class="description last">The texture where filtered output should be drawn.</td>
</tr>
<tr>
<td class="name"><code>context</code></td>
<td class="type">
<span class="param-type">WebGLRenderingContext</span>
</td>
<td class="description last">The GL context used for rendering.</td>
</tr>
<tr>
<td class="name"><code>programCache</code></td>
<td class="type">
<span class="param-type">Object</span>
</td>
<td class="description last">A map of compiled shader programs, keyed by filter type.</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="inherited-from">Inherited From:</dt>
<dd class="inherited-from"><ul class="dummy"><li>
<a href="fabric.Image.filters.BaseFilter.html#applyTo">fabric.Image.filters.BaseFilter#applyTo</a>
</li></ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line22285">line 22285</a>
</li></ul></dd>
</dl>
</div>
<h4 class="name" id="applyTo2d"><a href="#applyTo2d" ><span class="type-signature"></span>applyTo2d<span class="signature">(options)</span><span class="type-signature"></span></a></h4>
<div class="description">
Apply the Grayscale operation to a Uint8Array representing the pixels of an image.
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>options</code></td>
<td class="type">
<span class="param-type">Object</span>
</td>
<td class="description last">
<h6>Properties</h6>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>imageData</code></td>
<td class="type">
<span class="param-type">ImageData</span>
</td>
<td class="description last">The Uint8Array to be filtered.</td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="fabric.js.html">fabric.js</a>, <a href="fabric.js.html#line23117">line 23117</a>
</li></ul></dd>
</dl>
<div class="inherited">
<h4 class="name" id="applyToWebGL"><a href="#applyToWebGL" ><span class="type-signature"></span>applyToWebGL<span class="signature">(options)</span><span class="type-signature"></span></a></h4>
<div class="description">
Apply this filter using webgl.
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>options</code></td>
<td class="type">
<span class="param-type">Object</span>
</td>
<td class="description last">
<h6>Properties</h6>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>passes</code></td>
<td class="type">
<span class="param-type">Number</span>
</td>
<td class="description last">The number of filters remaining to be executed</td>
</tr>
<tr>
<td class="name"><code>webgl</code></td>
<td class="type">
<span class="param-type">Boolean</span>
</td>
<td class="description last">Whether to use webgl to render the filter.</td>
</tr>
<tr>
<td class="name"><code>originalTexture</code></td>
<td class="type">
<span class="param-type">WebGLTexture</span>
</td>
<td class="description last">The texture of the original input image.</td>
</tr>
<tr>
<td class="name"><code>sourceTexture</code></td>
<td class="type">
<span class="param-type">WebGLTexture</span>
</td>
<td class="description last">The texture setup as the source to be filtered.</td>
</tr>
<tr>
<td class="name"><code>targetTexture</code></td>
<td class="type">