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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

              
                - var imageURL = "https://images.unsplash.com/photo-1436564989038-18b9958df72b?crop=entropy&fit=crop&fm=jpg&h=825&ixjsv=2.1.0&ixlib=rb-0.3.5&q=80&w=1600";

//- The thumbnail URI is the same image as the imageURL, but is scaled down to 30px in width. 
- var thumbnailURI = "data:image/png;base64,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";

- var defaultTransitionDuration = "400ms";
- var defaultWrapperWidth = "900px";
- var defaultBlurRadius = 7;

- var imageHeight = 825;
- var imageWidth = 1600;

//- I'm not sure why Medium sets the canvas width to 75, 
//- but they seem to scale the canvas height  proportionally according to the aspect ratio
- var canvasWidth = 75;

//- The canvas height needs to be proportionately scaled down 
- var canvasHeight = (imageHeight * canvasWidth) / imageWidth;



.wrapper
	//- The aspect ratio padding bottom is set dynamically through javascript
	.aspect-ratio-fill
		.ProgressiveMedia
			canvas.ProgressiveMedia__canvas(width=canvasWidth, height=canvasHeight)
			img.ProgressiveMedia__image(data-src=imageURL)
			img.ProgressiveMedia__thumbnail(src=thumbnailURI)

.details-wrapper
	.details
		button.Button#show Show Canvas

		.Settings
			label("title"="The time of the fade transition in seconds or milliseconds") 
				.Settings__text Transition Time:
				input#transitionTime.Settings__input(type="text", value=defaultTransitionDuration, placeholder="time", maxLength="10") 

		.Settings
			label("title"="The max width of wrapper") 
				.Settings__text Wrapper Width:
				input#width.Settings__input(type="text", value=defaultWrapperWidth, placeholder="Wrapper Width",  maxLength="10") 

		.Settings
			label("title"="The blur radius")
				.Settings__text Canvas Blur:
				#rangeText.Settings__range__text 180
				input#blur.Settings__range(type="range", value=defaultBlurRadius, placeholder="Blur", min="0", max="100") 




              
            
!

CSS

              
                @import 'bourbon'


/*
 * The fade in / fade out for the canvas and image might be off, I can't tell
 */


/**
 * Makes an element expand to fill its container 
 * using absolute positioning
 */
=fill
	display: block
	+position(absolute, 0 null null 0)
	+size(100%)

$wrapper-width: 900px




body
	background-color: #eee
	color: #444
	font-family: Karla
	line-height: 1.6

.wrapper
	max-width: $wrapper-width
	margin: 0 auto
	



.aspect-ratio-fill
	position: relative
	display: block
	
@at-root
	$fade-transition-duration: 400ms
	$fade-transition-delay: 0ms

	.ProgressiveMedia
		background-color: #eee
		+fill

		&.isImageLoaded
			> .ProgressiveMedia__image
				opacity: 1


	.ProgressiveMedia__thumbnail
		display: none

	.ProgressiveMedia__image,
	.ProgressiveMedia__canvas
		border-radius: 3px
		+fill

	.ProgressiveMedia__image
		opacity: 0
		transition: opacity $fade-transition-duration $fade-transition-delay
		z-index: 1


	
	
/**
 * Other stuff that doesn't pertain to the component itself 
 */
.details-wrapper
	position: absolute
	width: 100%
	bottom: 50px
	z-index: 3

.details
	display: flex
	justify-content: center
	flex-wrap: wrap

	> *
		margin-right: 5px

@at-root
	$padding-v: 15px
	$padding-h: 36px
	$font-size: 14px
	$line-height: 20px
	$background-color: rgba(white, 0.7)
	$spacing: 20px

	label
		align-items: center
		background-color: $background-color
		box-shadow: 0 2px 3px 0 rgba(black, 0.1), 0 2px 4px 0 rgba(black, 0.05)
		border-radius: 3px 
		display: inline-flex
		font-size: $font-size
		line-height: $line-height
		padding: 0 0 0 ($padding-h / 2)

	input[type="text"]
		background-color: $background-color	
		border: 0
		border-left: 1px solid rgba(black, 0.1)
		border-radius: 0 3px 3px 0
		color: #555
		font-size: 13px
		font-weight: bold
		line-height: $line-height
		padding: $padding-v 0	
		margin-left: 20px
	
	.Settings
		margin-bottom: $spacing
		position: relative
	
	.Settings__text
		padding: $padding-v 0
		display: inine-block
	
	.Settings__input
		background-color: rgba(white, 0.4)
		text-align: center
		width: 120px
	
	.Settings__range
		margin: 0 10px
	
	.Settings__range__text
		font-weight: bold	
		opacity: 0
		position: absolute
		transition: opacity 0.2s
		top: -20px	
		right: 0px
	
		&.isShowing
			opacity: 1
		
	.Button
		background-color: $background-color
		border: 0
		border-radius: 3px
		box-shadow: 0 3px 6px 0 rgba(black, 0.08), 0 4px 12px 0 rgba(black, 0.08)
		color: #444
		cursor: pointer
		display: inline-block
		font-size: $font-size
		font-weight: bold
		line-height: 20px
		min-width: 170px
		outline: 0
		padding: $padding-v $padding-h
		position: relative
		text-align: center
		transition: box-shadow 0.15s, background-color 0.15s
		user-select: none
		margin-bottom: $spacing
	
		&:active
			box-shadow: 0 2px 3px 0 rgba(black, 0.1), 0 2px 4px 0 rgba(black, 0.05)







              
            
!

JS

              
                function main() {
	/**
	 * The amount to blur the canvas 
	 */
	const MAX_BLUR_RADIUS = 180;
	
	/**
	 * The delay so the it's easier to observe the initial fade in
	 */
	const INITIAL_DELAY = 1000;
	
	var blurRadius = 7;	
	
	var component = $('.ProgressiveMedia');
	var image     = $('.ProgressiveMedia__image');
	var canvas    = $('.ProgressiveMedia__canvas');
	var thumbnail = $('.ProgressiveMedia__thumbnail');

	var context = canvas.getContext('2d');
	
	/**
	 * The aspect-ratio-fill padding is set here. 
	 */
	var aspectRatioFill = document.querySelector('.aspect-ratio-fill');
	var percentage = (thumbnail.naturalHeight / thumbnail.naturalWidth) * 100;
	aspectRatioFill.style.paddingBottom = `${percentage}%`;

	/**
	 * Draw the thumbnail onto the canvas, then blur it
	 */
	drawThumbnail(blurRadius);
	
	/**
	 * Load the image in. Once it's loaded, add a class to the 
	 * component wrapper that fades in the image and fades out 
	 * the canvas element.
	 */
	image.src = image.dataset.src;
	image.addEventListener('load', function onImageLoaded() {
		image.removeEventListener('load', onImageLoaded);
		
		// This delay is only set so the we can see the blur effect more clearly on page load  
		setTimeout(function () {
			component.classList.add('isImageLoaded');
		}, INITIAL_DELAY);		
	});
	
	/**
	 * Draws the thumbnail into the canvas and blurs it
	 */
	function drawThumbnail(blur) {
			context
			.drawImage(thumbnail, 0, 0, thumbnail.naturalWidth,
								thumbnail.naturalHeight, 0, 0, canvas.width, canvas.height);
		StackBlur.canvasRGBA(canvas, 0, 0, canvas.width, canvas.height, blur);
	}
	
	
	
	
	/**
	 * The rest of this does not pertain to the ProgressiveMedia 
	 * component itself 
	 */ 
	const WRAPPER_WIDTH_KEY = 'wrapperWidth';
	const TRANSITION_KEY = 'transitionTime';
	
	var defaultWrapperWidth = '900px';	
	var defaultTransitionTime = '400ms';
	
	var button          = $('#show');
	var transitionInput = $('#transitionTime');	
	var widthInput      = $('#width');	
	var blurRange       = $('#blur');
	var rangeTooltip    = $('#rangeText');	
	var wrapper         = $('.wrapper');	
	
	

	blurRange.addEventListener('input', function () {
		var blur = (this.value * MAX_BLUR_RADIUS) / 100;		
		drawThumbnail(blur);
		rangeTooltip.textContent = blur;

		if ( ! rangeTooltip.classList.contains('isShowing')) {
			rangeTooltip.classList.add('isShowing');
		}
	});
	
	blurRange.addEventListener('change', function onRangeChange() {
		rangeTooltip.classList.remove('isShowing');
	});
	
	button.addEventListener('click', function onButtonClick() {
		var hasClass = component.classList.contains('isImageLoaded');
		button.textContent = (hasClass) ? 'Show Image' : 'Show Canvas';
		component.classList.toggle('isImageLoaded');
	});
	
	transitionInput.addEventListener('keyup', function onInputKeydown() {
		image.style.transitionDuration  = this.value;
		canvas.style.transitionDuration = this.value;
		storage.set(TRANSITION_KEY, this.value);
	});
	
	widthInput.addEventListener('keyup', function onInputKeydown() {
		wrapper.style.maxWidth = this.value;
		
		// Remember the wrapper width 
		storage.set(WRAPPER_WIDTH_KEY, this.value);
	});
	
	var storage = {
		set: function (key, value) {
			localStorage.setItem(key, JSON.stringify(value));
		},
		get: function (key, defaultValue) {
			var value = localStorage.getItem(key)
			if (value === null) {
				return defaultValue;
			}
			
			return JSON.parse(value);
		}
	};

	// Remember the settings in local storage
	widthInput.value = storage.get(WRAPPER_WIDTH_KEY, defaultWrapperWidth);
	wrapper.style.maxWidth = storage.get(WRAPPER_WIDTH_KEY, defaultWrapperWidth);
	
	transitionInput.value = storage.get(TRANSITION_KEY, defaultTransitionTime);
	image.style.transitionDuration  = storage.get(TRANSITION_KEY, defaultTransitionTime);
	canvas.style.transitionDuration = storage.get(TRANSITION_KEY, defaultTransitionTime);

	function $(selector) {
		return document.querySelector(selector);
	}
}

// Set a timeout so we make sure StackBlur is defined
setTimeout(main, 0);






/**
 * StackBlur.js
 * from https://github.com/flozz/StackBlur/
 */
(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.StackBlur = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
/*
    StackBlur - a fast almost Gaussian Blur For Canvas

    Version:     0.5
    Author:        Mario Klingemann
    Contact:     mario@quasimondo.com
    Website:    http://www.quasimondo.com/StackBlurForCanvas
    Twitter:    @quasimondo

    In case you find this class useful - especially in commercial projects -
    I am not totally unhappy for a small donation to my PayPal account
    mario@quasimondo.de

    Or support me on flattr:
    https://flattr.com/thing/72791/StackBlur-a-fast-almost-Gaussian-Blur-Effect-for-CanvasJavascript

    Copyright (c) 2010 Mario Klingemann

    Permission is hereby granted, free of charge, to any person
    obtaining a copy of this software and associated documentation
    files (the "Software"), to deal in the Software without
    restriction, including without limitation the rights to use,
    copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the
    Software is furnished to do so, subject to the following
    conditions:

    The above copyright notice and this permission notice shall be
    included in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
    OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
    HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
    WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
    OTHER DEALINGS IN THE SOFTWARE.
    */


var mul_table = [
    512,512,456,512,328,456,335,512,405,328,271,456,388,335,292,512,
    454,405,364,328,298,271,496,456,420,388,360,335,312,292,273,512,
    482,454,428,405,383,364,345,328,312,298,284,271,259,496,475,456,
    437,420,404,388,374,360,347,335,323,312,302,292,282,273,265,512,
    497,482,468,454,441,428,417,405,394,383,373,364,354,345,337,328,
    320,312,305,298,291,284,278,271,265,259,507,496,485,475,465,456,
    446,437,428,420,412,404,396,388,381,374,367,360,354,347,341,335,
    329,323,318,312,307,302,297,292,287,282,278,273,269,265,261,512,
    505,497,489,482,475,468,461,454,447,441,435,428,422,417,411,405,
    399,394,389,383,378,373,368,364,359,354,350,345,341,337,332,328,
    324,320,316,312,309,305,301,298,294,291,287,284,281,278,274,271,
    268,265,262,259,257,507,501,496,491,485,480,475,470,465,460,456,
    451,446,442,437,433,428,424,420,416,412,408,404,400,396,392,388,
    385,381,377,374,370,367,363,360,357,354,350,347,344,341,338,335,
    332,329,326,323,320,318,315,312,310,307,304,302,299,297,294,292,
    289,287,285,282,280,278,275,273,271,269,267,265,263,261,259];


var shg_table = [
    9, 11, 12, 13, 13, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 17,
    17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 18, 19,
    19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20,
    20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 21,
    21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
    21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22,
    22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
    22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23,
    23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23,
    23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23,
    23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23,
    23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
    24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
    24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
    24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
    24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24 ];


function processImage(img, canvas, radius, blurAlphaChannel)
{
    if (typeof(img) == 'string') {
        var img = document.getElementById(img);
    }
    else if (!img instanceof HTMLImageElement) {
        return;
    }
    var w = img.naturalWidth;
    var h = img.naturalHeight;

    if (typeof(canvas) == 'string') {
        var canvas = document.getElementById(canvas);
    }
    else if (!canvas instanceof HTMLCanvasElement) {
        return;
    }

    canvas.style.width  = w + 'px';
    canvas.style.height = h + 'px';
    canvas.width = w;
    canvas.height = h;

    var context = canvas.getContext('2d');
    context.clearRect(0, 0, w, h);
    context.drawImage(img, 0, 0);

    if (isNaN(radius) || radius < 1) return;

    if (blurAlphaChannel)
        processCanvasRGBA(canvas, 0, 0, w, h, radius);
    else
        processCanvasRGB(canvas, 0, 0, w, h, radius);
}

function getImageDataFromCanvas(canvas, top_x, top_y, width, height)
{
    if (typeof(canvas) == 'string')
        var canvas  = document.getElementById(canvas);
    else if (!canvas instanceof HTMLCanvasElement)
        return;

    var context = canvas.getContext('2d');
    var imageData;

    try {
        try {
            imageData = context.getImageData(top_x, top_y, width, height);
        } catch(e) {

            // NOTE: this part is supposedly only needed if you want to work with local files
            // so it might be okay to remove the whole try/catch block and just use
            // imageData = context.getImageData(top_x, top_y, width, height);
            try {
                netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead");
                imageData = context.getImageData(top_x, top_y, width, height);
            } catch(e) {
                alert("Cannot access local image");
                throw new Error("unable to access local image data: " + e);
                return;
            }
        }
    } catch(e) {
        alert("Cannot access image");
        throw new Error("unable to access image data: " + e);
    }

    return imageData;
}

function processCanvasRGBA(canvas, top_x, top_y, width, height, radius)
{
    if (isNaN(radius) || radius < 1) return;
    radius |= 0;

    var imageData = getImageDataFromCanvas(canvas, top_x, top_y, width, height);

    imageData = processImageDataRGBA(imageData, top_x, top_y, width, height, radius);

    canvas.getContext('2d').putImageData(imageData, top_x, top_y);
}

function processImageDataRGBA(imageData, top_x, top_y, width, height, radius)
{
    var pixels = imageData.data;

    var x, y, i, p, yp, yi, yw, r_sum, g_sum, b_sum, a_sum,
        r_out_sum, g_out_sum, b_out_sum, a_out_sum,
        r_in_sum, g_in_sum, b_in_sum, a_in_sum,
        pr, pg, pb, pa, rbs;

    var div = radius + radius + 1;
    var w4 = width << 2;
    var widthMinus1  = width - 1;
    var heightMinus1 = height - 1;
    var radiusPlus1  = radius + 1;
    var sumFactor = radiusPlus1 * (radiusPlus1 + 1) / 2;

    var stackStart = new BlurStack();
    var stack = stackStart;
    for (i = 1; i < div; i++)
    {
        stack = stack.next = new BlurStack();
        if (i == radiusPlus1) var stackEnd = stack;
    }
    stack.next = stackStart;
    var stackIn = null;
    var stackOut = null;

    yw = yi = 0;

    var mul_sum = mul_table[radius];
    var shg_sum = shg_table[radius];

    for (y = 0; y < height; y++)
    {
        r_in_sum = g_in_sum = b_in_sum = a_in_sum = r_sum = g_sum = b_sum = a_sum = 0;

        r_out_sum = radiusPlus1 * (pr = pixels[yi]);
        g_out_sum = radiusPlus1 * (pg = pixels[yi+1]);
        b_out_sum = radiusPlus1 * (pb = pixels[yi+2]);
        a_out_sum = radiusPlus1 * (pa = pixels[yi+3]);

        r_sum += sumFactor * pr;
        g_sum += sumFactor * pg;
        b_sum += sumFactor * pb;
        a_sum += sumFactor * pa;

        stack = stackStart;

        for (i = 0; i < radiusPlus1; i++)
        {
            stack.r = pr;
            stack.g = pg;
            stack.b = pb;
            stack.a = pa;
            stack = stack.next;
        }

        for (i = 1; i < radiusPlus1; i++)
        {
            p = yi + ((widthMinus1 < i ? widthMinus1 : i) << 2);
            r_sum += (stack.r = (pr = pixels[p])) * (rbs = radiusPlus1 - i);
            g_sum += (stack.g = (pg = pixels[p+1])) * rbs;
            b_sum += (stack.b = (pb = pixels[p+2])) * rbs;
            a_sum += (stack.a = (pa = pixels[p+3])) * rbs;

            r_in_sum += pr;
            g_in_sum += pg;
            b_in_sum += pb;
            a_in_sum += pa;

            stack = stack.next;
        }


        stackIn = stackStart;
        stackOut = stackEnd;
        for (x = 0; x < width; x++)
        {
            pixels[yi+3] = pa = (a_sum * mul_sum) >> shg_sum;
            if (pa != 0)
            {
                pa = 255 / pa;
                pixels[yi]   = ((r_sum * mul_sum) >> shg_sum) * pa;
                pixels[yi+1] = ((g_sum * mul_sum) >> shg_sum) * pa;
                pixels[yi+2] = ((b_sum * mul_sum) >> shg_sum) * pa;
            } else {
                pixels[yi] = pixels[yi+1] = pixels[yi+2] = 0;
            }

            r_sum -= r_out_sum;
            g_sum -= g_out_sum;
            b_sum -= b_out_sum;
            a_sum -= a_out_sum;

            r_out_sum -= stackIn.r;
            g_out_sum -= stackIn.g;
            b_out_sum -= stackIn.b;
            a_out_sum -= stackIn.a;

            p =  (yw + ((p = x + radius + 1) < widthMinus1 ? p : widthMinus1)) << 2;

            r_in_sum += (stackIn.r = pixels[p]);
            g_in_sum += (stackIn.g = pixels[p+1]);
            b_in_sum += (stackIn.b = pixels[p+2]);
            a_in_sum += (stackIn.a = pixels[p+3]);

            r_sum += r_in_sum;
            g_sum += g_in_sum;
            b_sum += b_in_sum;
            a_sum += a_in_sum;

            stackIn = stackIn.next;

            r_out_sum += (pr = stackOut.r);
            g_out_sum += (pg = stackOut.g);
            b_out_sum += (pb = stackOut.b);
            a_out_sum += (pa = stackOut.a);

            r_in_sum -= pr;
            g_in_sum -= pg;
            b_in_sum -= pb;
            a_in_sum -= pa;

            stackOut = stackOut.next;

            yi += 4;
        }
        yw += width;
    }


    for (x = 0; x < width; x++)
    {
        g_in_sum = b_in_sum = a_in_sum = r_in_sum = g_sum = b_sum = a_sum = r_sum = 0;

        yi = x << 2;
        r_out_sum = radiusPlus1 * (pr = pixels[yi]);
        g_out_sum = radiusPlus1 * (pg = pixels[yi+1]);
        b_out_sum = radiusPlus1 * (pb = pixels[yi+2]);
        a_out_sum = radiusPlus1 * (pa = pixels[yi+3]);

        r_sum += sumFactor * pr;
        g_sum += sumFactor * pg;
        b_sum += sumFactor * pb;
        a_sum += sumFactor * pa;

        stack = stackStart;

        for (i = 0; i < radiusPlus1; i++)
        {
            stack.r = pr;
            stack.g = pg;
            stack.b = pb;
            stack.a = pa;
            stack = stack.next;
        }

        yp = width;

        for (i = 1; i <= radius; i++)
        {
            yi = (yp + x) << 2;

            r_sum += (stack.r = (pr = pixels[yi])) * (rbs = radiusPlus1 - i);
            g_sum += (stack.g = (pg = pixels[yi+1])) * rbs;
            b_sum += (stack.b = (pb = pixels[yi+2])) * rbs;
            a_sum += (stack.a = (pa = pixels[yi+3])) * rbs;

            r_in_sum += pr;
            g_in_sum += pg;
            b_in_sum += pb;
            a_in_sum += pa;

            stack = stack.next;

            if(i < heightMinus1)
            {
                yp += width;
            }
        }

        yi = x;
        stackIn = stackStart;
        stackOut = stackEnd;
        for (y = 0; y < height; y++)
        {
            p = yi << 2;
            pixels[p+3] = pa = (a_sum * mul_sum) >> shg_sum;
            if (pa > 0)
            {
                pa = 255 / pa;
                pixels[p]   = ((r_sum * mul_sum) >> shg_sum) * pa;
                pixels[p+1] = ((g_sum * mul_sum) >> shg_sum) * pa;
                pixels[p+2] = ((b_sum * mul_sum) >> shg_sum) * pa;
            } else {
                pixels[p] = pixels[p+1] = pixels[p+2] = 0;
            }

            r_sum -= r_out_sum;
            g_sum -= g_out_sum;
            b_sum -= b_out_sum;
            a_sum -= a_out_sum;

            r_out_sum -= stackIn.r;
            g_out_sum -= stackIn.g;
            b_out_sum -= stackIn.b;
            a_out_sum -= stackIn.a;

            p = (x + (((p = y + radiusPlus1) < heightMinus1 ? p : heightMinus1) * width)) << 2;

            r_sum += (r_in_sum += (stackIn.r = pixels[p]));
            g_sum += (g_in_sum += (stackIn.g = pixels[p+1]));
            b_sum += (b_in_sum += (stackIn.b = pixels[p+2]));
            a_sum += (a_in_sum += (stackIn.a = pixels[p+3]));

            stackIn = stackIn.next;

            r_out_sum += (pr = stackOut.r);
            g_out_sum += (pg = stackOut.g);
            b_out_sum += (pb = stackOut.b);
            a_out_sum += (pa = stackOut.a);

            r_in_sum -= pr;
            g_in_sum -= pg;
            b_in_sum -= pb;
            a_in_sum -= pa;

            stackOut = stackOut.next;

            yi += width;
        }
    }
    return imageData;
}

function processCanvasRGB(canvas, top_x, top_y, width, height, radius)
{
    if (isNaN(radius) || radius < 1) return;
    radius |= 0;

    var imageData = getImageDataFromCanvas(canvas, top_x, top_y, width, height);
    imageData = processImageDataRGB(imageData, top_x, top_y, width, height, radius);

    canvas.getContext('2d').putImageData(imageData, top_x, top_y);
}

function processImageDataRGB(imageData, top_x, top_y, width, height, radius)
{
    var pixels = imageData.data;

    var x, y, i, p, yp, yi, yw, r_sum, g_sum, b_sum,
        r_out_sum, g_out_sum, b_out_sum,
        r_in_sum, g_in_sum, b_in_sum,
        pr, pg, pb, rbs;

    var div = radius + radius + 1;
    var w4 = width << 2;
    var widthMinus1  = width - 1;
    var heightMinus1 = height - 1;
    var radiusPlus1  = radius + 1;
    var sumFactor = radiusPlus1 * (radiusPlus1 + 1) / 2;

    var stackStart = new BlurStack();
    var stack = stackStart;
    for (i = 1; i < div; i++)
    {
        stack = stack.next = new BlurStack();
        if (i == radiusPlus1) var stackEnd = stack;
    }
    stack.next = stackStart;
    var stackIn = null;
    var stackOut = null;

    yw = yi = 0;

    var mul_sum = mul_table[radius];
    var shg_sum = shg_table[radius];

    for (y = 0; y < height; y++)
    {
        r_in_sum = g_in_sum = b_in_sum = r_sum = g_sum = b_sum = 0;

        r_out_sum = radiusPlus1 * (pr = pixels[yi]);
        g_out_sum = radiusPlus1 * (pg = pixels[yi+1]);
        b_out_sum = radiusPlus1 * (pb = pixels[yi+2]);

        r_sum += sumFactor * pr;
        g_sum += sumFactor * pg;
        b_sum += sumFactor * pb;

        stack = stackStart;

        for (i = 0; i < radiusPlus1; i++)
        {
            stack.r = pr;
            stack.g = pg;
            stack.b = pb;
            stack = stack.next;
        }

        for (i = 1; i < radiusPlus1; i++)
        {
            p = yi + ((widthMinus1 < i ? widthMinus1 : i) << 2);
            r_sum += (stack.r = (pr = pixels[p])) * (rbs = radiusPlus1 - i);
            g_sum += (stack.g = (pg = pixels[p+1])) * rbs;
            b_sum += (stack.b = (pb = pixels[p+2])) * rbs;

            r_in_sum += pr;
            g_in_sum += pg;
            b_in_sum += pb;

            stack = stack.next;
        }


        stackIn = stackStart;
        stackOut = stackEnd;
        for (x = 0; x < width; x++)
        {
            pixels[yi]   = (r_sum * mul_sum) >> shg_sum;
            pixels[yi+1] = (g_sum * mul_sum) >> shg_sum;
            pixels[yi+2] = (b_sum * mul_sum) >> shg_sum;

            r_sum -= r_out_sum;
            g_sum -= g_out_sum;
            b_sum -= b_out_sum;

            r_out_sum -= stackIn.r;
            g_out_sum -= stackIn.g;
            b_out_sum -= stackIn.b;

            p =  (yw + ((p = x + radius + 1) < widthMinus1 ? p : widthMinus1)) << 2;

            r_in_sum += (stackIn.r = pixels[p]);
            g_in_sum += (stackIn.g = pixels[p+1]);
            b_in_sum += (stackIn.b = pixels[p+2]);

            r_sum += r_in_sum;
            g_sum += g_in_sum;
            b_sum += b_in_sum;

            stackIn = stackIn.next;

            r_out_sum += (pr = stackOut.r);
            g_out_sum += (pg = stackOut.g);
            b_out_sum += (pb = stackOut.b);

            r_in_sum -= pr;
            g_in_sum -= pg;
            b_in_sum -= pb;

            stackOut = stackOut.next;

            yi += 4;
        }
        yw += width;
    }


    for (x = 0; x < width; x++)
    {
        g_in_sum = b_in_sum = r_in_sum = g_sum = b_sum = r_sum = 0;

        yi = x << 2;
        r_out_sum = radiusPlus1 * (pr = pixels[yi]);
        g_out_sum = radiusPlus1 * (pg = pixels[yi+1]);
        b_out_sum = radiusPlus1 * (pb = pixels[yi+2]);

        r_sum += sumFactor * pr;
        g_sum += sumFactor * pg;
        b_sum += sumFactor * pb;

        stack = stackStart;

        for (i = 0; i < radiusPlus1; i++)
        {
            stack.r = pr;
            stack.g = pg;
            stack.b = pb;
            stack = stack.next;
        }

        yp = width;

        for (i = 1; i <= radius; i++)
        {
            yi = (yp + x) << 2;

            r_sum += (stack.r = (pr = pixels[yi])) * (rbs = radiusPlus1 - i);
            g_sum += (stack.g = (pg = pixels[yi+1])) * rbs;
            b_sum += (stack.b = (pb = pixels[yi+2])) * rbs;

            r_in_sum += pr;
            g_in_sum += pg;
            b_in_sum += pb;

            stack = stack.next;

            if(i < heightMinus1)
            {
                yp += width;
            }
        }

        yi = x;
        stackIn = stackStart;
        stackOut = stackEnd;
        for (y = 0; y < height; y++)
        {
            p = yi << 2;
            pixels[p]   = (r_sum * mul_sum) >> shg_sum;
            pixels[p+1] = (g_sum * mul_sum) >> shg_sum;
            pixels[p+2] = (b_sum * mul_sum) >> shg_sum;

            r_sum -= r_out_sum;
            g_sum -= g_out_sum;
            b_sum -= b_out_sum;

            r_out_sum -= stackIn.r;
            g_out_sum -= stackIn.g;
            b_out_sum -= stackIn.b;

            p = (x + (((p = y + radiusPlus1) < heightMinus1 ? p : heightMinus1) * width)) << 2;

            r_sum += (r_in_sum += (stackIn.r = pixels[p]));
            g_sum += (g_in_sum += (stackIn.g = pixels[p+1]));
            b_sum += (b_in_sum += (stackIn.b = pixels[p+2]));

            stackIn = stackIn.next;

            r_out_sum += (pr = stackOut.r);
            g_out_sum += (pg = stackOut.g);
            b_out_sum += (pb = stackOut.b);

            r_in_sum -= pr;
            g_in_sum -= pg;
            b_in_sum -= pb;

            stackOut = stackOut.next;

            yi += width;
        }
    }

    return imageData;
}

function BlurStack()
{
    this.r = 0;
    this.g = 0;
    this.b = 0;
    this.a = 0;
    this.next = null;
}

module.exports = {
    image: processImage,
    canvasRGBA: processCanvasRGBA,
    canvasRGB: processCanvasRGB,
    imageDataRGBA: processImageDataRGBA,
    imageDataRGB: processImageDataRGB
};

},{}]},{},[1])(1)
});
              
            
!
999px

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