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1 files changed, 648 insertions, 0 deletions

diff --git a/js/canvasimages.js b/js/canvasimages.js
new file mode 100644
index 0000000..eba4279
--- /dev/null
+++ b/js/canvasimages.js
@@ -0,0 +1,648 @@
+/**

+ * @fileOverview HTML5 canvas image functions

+ * @author Ian Moore (imoore76 at yahoo dot com)

+ * @version $Id: canvasimages.js 591 2015-04-11 22:40:47Z imoore76 $

+ * @copyright Copyright (C) 2010-2015 Ian Moore (imoore76 at yahoo dot com)

+ */

+

+/**

+ * Returns true if broswer supports canvas

+ * @return {Boolean} true if broswer supports canvas

+ */

+var __vboxIsCanvasSupported = null; // cached

+var isCanvasSupported = function(){

+	if(__vboxIsCanvasSupported === null) {

+		try {

+			var elem = document.createElement('canvas');			

+			__vboxIsCanvasSupported = !!(elem && elem.getContext && elem.getContext('2d'));

+		} catch (err) {

+			__vboxIsCanvasSupported = false;

+		}

+	}

+	return __vboxIsCanvasSupported;

+};

+

+var __vboxPreviewCanvasCache = [];

+function vboxDrawPreviewCanvas(can, imageObj, text, width, height) {

+	

+	var screenMargin = 7;

+	var margin = 10;

+	

+	var resizeToImage = (imageObj && (imageObj.width == width));

+	

+	// Height / width comes from direct image values

+	if(imageObj && resizeToImage) {

+		

+		height = imageObj.height;

+		width = imageObj.width;

+		

+	// Set height while maintaining aspect ratio

+	} else if (imageObj) {

+		

+		height = imageObj.height * (width/imageObj.width);

+	}

+	

+	// Margins are added to width

+	height += ((margin+screenMargin)*2);

+	width += ((margin+screenMargin)*2);

+	

+	// Does canvas still exist?

+	// VM selection can change while this function is running

+	// in which case the canvas goes away

+	if(!can) return;

+	

+	// Set canvas values

+	can.height = height;

+	can.width = width;

+

+	var ctx = can.getContext('2d');

+

+	

+	// Clear the canvas

+	ctx.clearRect(0,0,width,height);

+	

+	ctx.save();

+	

+	// Draw and cache monitor image if it is not present

+	if(!__vboxPreviewCanvasCache[width+'x'+height]) {

+		

+		var cachedCanvas = document.createElement('canvas');

+		

+		cachedCanvas.width = width;

+		cachedCanvas.height = height;

+		

+		var cachedCtx = cachedCanvas.getContext('2d');

+		

+		cachedCtx.beginPath();

+		cachedCtx.strokeStyle = "#000000";

+		cachedCtx.lineWidth = 0.3;

+		cachedCtx.lineCap = 'butt';

+		

+		cachedCtx.moveTo(margin*2,margin);

+		

+		// top and top right

+		cachedCtx.lineTo(width-(margin*2), margin);

+		cachedCtx.arcTo(width-margin, margin, width-margin,margin*2, margin);

+		

+		// Side and bottom right

+		cachedCtx.lineTo(width-margin, height-(margin*2));

+		cachedCtx.arcTo(width-margin, height-margin, width-(margin*2), height-margin, margin);

+		

+		// bottom and bottom left

+		cachedCtx.lineTo(margin*2, height-margin);

+		cachedCtx.arcTo(margin, height-margin, margin, height-(margin*2), margin);

+		

+		// Left line and top left

+		cachedCtx.lineTo(margin, margin*2);

+		cachedCtx.arcTo(margin, margin, margin * 2, margin, margin);

+			

+		cachedCtx.closePath();

+		cachedCtx.save();

+		cachedCtx.shadowOffsetX = 5;

+		cachedCtx.shadowOffsetY = 5;

+		cachedCtx.shadowBlur = 4;

+		cachedCtx.shadowColor = "rgba(30, 30, 30, 0.2)";            

+		

+		

+		var grad = cachedCtx.createLinearGradient(0, margin, 0, height);

+		grad.addColorStop(0, "rgb(200,200,200)");

+		grad.addColorStop(0.4, "rgb(100,100,100)");

+		grad.addColorStop(0.5, "rgb(66,66,66)");

+		grad.addColorStop(0.7, "rgb(100,100,100)");

+		grad.addColorStop(1, "rgb(200,200,200)");

+		

+		cachedCtx.fillStyle = grad;

+		

+		cachedCtx.fill();

+		

+		// Redraw so that shadow is seen on all sides

+		cachedCtx.shadowOffsetX = -5;

+		cachedCtx.shadowOffsetY = -5;

+		cachedCtx.fill();

+		cachedCtx.restore();

+		cachedCtx.fillRect(margin+screenMargin,margin+screenMargin,width-(margin*2)-(screenMargin*2),height-(margin*2)-(screenMargin*2));             

+		cachedCtx.stroke();

+		cachedCtx.restore();

+		

+		var cvs = document.createElement('canvas');

+

+		/* Gloss */

+		var rectX = 0;

+		var rectY = 0;

+		var rectWidth = width-(margin+screenMargin)*2;

+		var rectHeight = height-(margin+screenMargin)*2;

+		

+		cvs.width = rectWidth;

+		cvs.height = rectHeight;

+		

+		var ctxBlur = cvs.getContext('2d');

+		ctxBlur.beginPath();

+		ctxBlur.lineWidth = 1;

+		ctxBlur.strokeStyle = "#000000";

+		ctxBlur.moveTo(rectX,rectY);

+		ctxBlur.lineTo(rectWidth, rectY);

+		ctxBlur.lineTo(rectWidth,rectHeight*1.0/3.0);

+		ctxBlur.bezierCurveTo(rectX+rectWidth / 2.0, rectY + rectHeight * 1.0/3.0,

+				rectX+rectWidth / 2.0, rectY + rectHeight * 2.0/3.0,

+				rectX, rectY + rectHeight * 2.0/3.0);

+		ctxBlur.closePath();

+		ctxBlur.fillStyle="rgba(255,255,255,0.3)";

+		ctxBlur.fill();

+		

+		stackBlurCanvasRGBA( cvs, 0, 0, rectWidth, rectHeight, 17 );

+		

+		ctx.drawImage(cvs, margin+screenMargin, margin+screenMargin, rectWidth, rectHeight);

+

+		__vboxPreviewCanvasCache[width+'x'+height] = {

+				'monitor' : cachedCanvas,

+				'gloss' : cvs

+		};

+		

+	}

+

+	// Draw cached monitor canvas

+	ctx.drawImage(__vboxPreviewCanvasCache[width+'x'+height]['monitor'], 0, 0, width, height);

+

+	/* Screenshot */

+	if(imageObj) {

+		

+		ctx.drawImage(imageObj, 0, 0, imageObj.width, imageObj.height, (margin+screenMargin), (margin+screenMargin), width-(margin*2)-(screenMargin*2),height-(margin*2)-(screenMargin*2));

+	}

+

+	// Draw cached gloss canvas

+	ctx.drawImage(__vboxPreviewCanvasCache[width+'x'+height]['gloss'], 0, 0, width, height);

+

+	/* Text */

+	if(!imageObj) {

+

+		txtCan = document.createElement('canvas');

+		txtCan.width = width-(margin+screenMargin)*2;

+		txtCan.height = height-(margin+screenMargin)*2;

+

+		fitTextToCanvas(txtCan, text, 18);

+		

+		ctx.drawImage(txtCan, (margin+screenMargin), (margin+screenMargin));

+	

+	}

+

+

+	return;

+}

+

+

+/* HELPERS */

+

+/**

+ * Fit text to a canvas element

+ * 

+ * @author Ian Moore

+ */

+var fitTextToCanvas = function(can, text, fontSize) {

+

+	var lineHeightOffset = 1.4;

+	var lineHeight = fontSize * lineHeightOffset;

+	var minFontSize = 10;

+	var padding = 2;

+	

+    var words = text.split(" ");

+

+    var maxWidth = can.width;

+    var maxHeight = can.height;

+    var context = can.getContext('2d');

+    context.moveTo(0,0);

+    

+    

+    var wrapTextLines = function() {

+    	

+    	context.font = "bold " + fontSize + "pt Arial";

+    	

+    	var line = '';

+    	var lines = [];

+    	

+         for (var n = 0; n < words.length; n++) {

+

+            var testLine = line + (line.length ? ' ' : '') + words[n];

+            

+            if((context.measureText(testLine).width + padding) > maxWidth) {

+            	

+            	// Only one word is too big

+            	if(testLine.indexOf(' ') == -1) {

+            		

+            		if(fontSize > minFontSize) {

+            			fontSize *= 0.9;

+            			return wrapTextLines();

+            		}

+            		line = testLine;

+            		

+            	} else {

+            		lines[lines.length] = line;

+            		line = words[n];            		

+            	}

+            	

+            } else {

+            	

+                line = testLine;

+            

+            }

+

+        }

+        if(line.length) {

+        	if((context.measureText(line).width + padding) > maxWidth && fontSize > minFontSize) {

+    			fontSize *= 0.9;

+    			return wrapTextLines();        		

+        	}

+        	lines[lines.length] = line;

+        }

+        return lines;

+

+    };

+    

+    // Initial wrap

+    lines = wrapTextLines();

+

+    // Since text will be aligned to the bottom, we subtract

+    // one lineheight addition because it will be off the

+    // visible canvas and should not be included in calculations

+    while(((lines.length * lineHeight)-(lineHeight-fontSize) > maxHeight) &&  fontSize > minFontSize) {

+    	fontSize *= 0.9;

+    	lines = wrapTextLines();

+    	lineHeight = fontSize * lineHeightOffset;

+    }

+   

+    context.fillStyle = "#ffffff";

+    context.textAlign = "center";

+    context.textBaseline = 'alphabetic';

+    context.strokeStyle = "#ff0000";

+    

+    var totalHeight = Math.round((lines.length * lineHeight)-(lineHeight-fontSize));

+    

+    for(var i = 0; i < lines.length; i++) {

+    	/*

+    	Uncomment to debug line heights

+    	

+    	context.moveTo(0, (maxHeight/2)-(totalHeight/2)+(lineHeight*i));

+    	context.lineTo(maxWidth, (maxHeight/2)-(totalHeight/2)+(lineHeight*i));

+    	context.stroke();

+    	context.moveTo(0, (maxHeight/2)-(totalHeight/2)+(lineHeight*i)+lineHeight);

+    	context.lineTo(maxWidth, (maxHeight/2)-(totalHeight/2)+(lineHeight*i)+lineHeight);

+    	context.stroke();

+		*/

+    	context.fillText(lines[i],(maxWidth/2),(maxHeight/2)-(totalHeight/2)+(lineHeight*i)+lineHeight-(lineHeight-fontSize));

+    }

+    return can;

+

+};

+

+/*

+

+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 ];

+

+var stackBlurCanvasRGBA = function( canvas, top_x, top_y, width, height, radius )

+{

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

+	radius |= 0;

+	

+	//var canvas  = document.getElementById( id );

+	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);

+	}

+			

+	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 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;

+		}

+	}

+	

+	context.putImageData( imageData, top_x, top_y );

+	

+};

+

+

+

+var BlurStack = function()

+{

+	this.r = 0;

+	this.g = 0;

+	this.b = 0;

+	this.a = 0;

+	this.next = null;

+};