svgedit/editor/canvg/StackBlur.js

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- Security fix: 'extPath', 'imgPath', 'extIconsPath', 'canvgPath', 'langPath', 'jGraduatePath', and 'jspdfPath' were not being prevented - Breaking change: Rename "svgutils.js" to "utilities.js" (make in conformity with JSDoc module naming convention) - Breaking change: Rename "svgedit.js" to "namespaces.js" (to make clear purpose and avoid confusing with editor) - Breaking change: Rename "jquery-svg.js" to "jQuery.attr.js" - Breaking change: Rename "jquery.contextMenu.js" to "jQuery.contextMenu.js" - Breaking change: Rename "jquery.jpicker.js" to "jQuery.jPicker.js" - Breaking change: Rename "JQuerySpinBtn.css" to "jQuery.SpinButton.css" - Breaking change: Rename "JQuerySpinBtn.js" to "jQuery.SpinButton.js" (to have file name more closely reflect name) - Breaking change: Rename "jquery.svgicons.js" to "jQuery.svgIcons.js" - Breaking change: Rename "jquery.jgraduate.js" to "jQuery.jGraduate.js" - Breaking change: Rename "pathseg.js" to "svgpathseg.js" (as it is a poyfill of SVGPathSeg) - Breaking change: Rename `addSvgElementFromJson()` to `addSVGElementFromJson` for consistency - Breaking change: Rename `changeSvgContent()` to `changeSVGContent()` for consistency - Breaking change: Have `exportPDF` resolve with `output` and `outputType` rather than `dataurlstring` (as type may vary) - Breaking change: Rename `extensions/mathjax/MathJax.js` to `extensions/mathjax/MathJax.min.js` - Breaking change: Avoid recent change to have editor ready callbacks return Promises (we're not using and advantageous to keep sequential) - Breaking change: Avoid recent addition of locale-side function in ext-imagelib for l10n - Breaking change: Change name of ext-arrows.js from `Arrows` to `arrows` for sake of file path (not localized anyways). - Breaking change: Change `addlangData` extension event to `addLangData` for consistency with method name - Breaking change: Have `readLang` return lang and data but do not call `setLang` - Fix: Have general locales load first so extensions may use - Fix: Provide `importLocale` to extensions `init` so it may delay adding of the extension until locale data loaded - Fix: Ensure call to `rasterExport` without `imgType` properly sets MIME type to PNG - Fix: Wrong name for moinsave - Update: Update WebAppFind per new API changes - Enhancement: Make `setStrings` public on editor for late setting (used by `ext-shapes.js`) - Enhancement: Add `extensions_added` event - Enhancement: Add `message` event (Relay messages including those which have been been received prior to extension load) - Enhancement: Allow SVGEdit to work out of the box--avoid need for copying sample config file. Should also help with Github-based file servers - Enhancement: Allow avoiding "name" in extension export (just extract out of file name) - Enhancement: Add stack blur to canvg by default (and refactoring it) - Enhancement: Return `Promise` for `embedImage` (as with some other loading methods) - Enhancement: Supply `importLocale` to `langReady` to facilitate extension locale loading - Enhancement: Recover if an extension fails to load (just log and otherwise ignore) - Enhancement: More i18n of extensions (also fixed issue with some console warnings about missing locale strings); i18nize Hello World too - Enhancement: Allowing importing of locales within `addLangData` - npm: Update devDeps - Docs: Migrate copies of all old wiki pages to docs/from-old-wiki folder; intended for a possible move to Markdown, so raw HTML (with formatting) was not preserved, though named links had their absolute URL links preserved - Docs: Begin deleting `SvgCanvas.md` as ensuring jsdoc has replacements - Docs: Add Edtior doc file for help to general users - Docs: Clarify/simplify install instructions - npm/Docs (JSDoc): Add script to check for overly generic types - Docs (JSDoc): For config/prefs and extension creating, link to tutorials (moved tutorials to own directory to avoid recursion problems by jsdoc) - Docs (JSDoc): Add modules (upper case for usual main entrance files or regular names) - Docs (JSDoc): Fill out missing areas; indicate return of `undefined`; consistency with `@returns` - Docs (JSDoc): Add our own layout template to support overflow - Docs (JSDoc): Use cleverLinks and disallow unknown tags - Docs (JSDoc): Insist on "pedantic" flag; put output directory in config - Docs (JSDoc): Use more precise Integer/Float over number, the specific type of array/function/object - Docs (JSDoc): Use `@throws`, `@enum`, `@event`/`@fires`/`@listens` - Docs: Generally update/improve docs (fixes #92) - Docs: Update links to `latest` path (Avoid needing to update such references upon each release) - Docs: 80 chars max - Refactoring: Drop code for extension as function (already requiring export to be an object) - Refactoring: Object destructuring, `Object.entries`, Object shorthand, array extras, more camelCase variable names - Refactoring: Add a `Command` base class - Refactoring: Simplify svgicons `callback` ready detection - Refactoring: Put `let` or `const` closer to scope - Refactoring: Remove unneeded `delimiter` from regex escaping utility - Refactoring: Clearer variable names - Refactoring: Use (non-deprecated) Event constructors - Testing: Use new Sinon
2018-06-06 07:26:20 +00:00
/**
* StackBlur - a fast almost Gaussian Blur For Canvas
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
* @module StackBlur
* @version 0.5
* @author Mario Klingemann
Contact: mario@quasimondo.com
Website: http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html
Twitter: @quasimondo
* @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.
*/
const mulTable = [
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];
const shgTable = [
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];
/**
* @param {string|HTMLImageElement} img
* @param {string|HTMLCanvasElement} canvas
* @param {Float} radius
* @param {boolean} blurAlphaChannel
* @returns {undefined}
*/
function processImage (img, canvas, radius, blurAlphaChannel) {
if (typeof img === 'string') {
img = document.getElementById(img);
}
if (!img || !('naturalWidth' in img)) {
return;
}
const w = img.naturalWidth;
const h = img.naturalHeight;
if (typeof canvas === 'string') {
canvas = document.getElementById(canvas);
}
if (!canvas || !('getContext' in canvas)) {
return;
}
canvas.style.width = w + 'px';
canvas.style.height = h + 'px';
canvas.width = w;
canvas.height = h;
const 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);
}
}
/**
* @param {string|HTMLCanvasElement} canvas
* @param {Integer} topX
* @param {Integer} topY
* @param {Integer} width
* @param {Integer} height
* @throws {Error}
* @returns {ImageData} See {@link https://html.spec.whatwg.org/multipage/canvas.html#imagedata}
*/
function getImageDataFromCanvas (canvas, topX, topY, width, height) {
if (typeof canvas === 'string') {
canvas = document.getElementById(canvas);
}
if (!canvas || !('getContext' in canvas)) {
return;
}
const context = canvas.getContext('2d');
try {
return context.getImageData(topX, topY, width, height);
} catch (e) {
throw new Error('unable to access image data: ' + e);
}
}
/**
* @param {HTMLCanvasElement} canvas
* @param {Integer} topX
* @param {Integer} topY
* @param {Integer} width
* @param {Integer} height
* @param {Float} radius
* @returns {undefined}
*/
function processCanvasRGBA (canvas, topX, topY, width, height, radius) {
if (isNaN(radius) || radius < 1) { return; }
radius |= 0;
let imageData = getImageDataFromCanvas(canvas, topX, topY, width, height);
imageData = processImageDataRGBA(imageData, topX, topY, width, height, radius);
canvas.getContext('2d').putImageData(imageData, topX, topY);
}
/**
* @param {ImageData} imageData
* @param {Integer} topX
* @param {Integer} topY
* @param {Integer} width
* @param {Integer} height
* @param {Float} radius
* @returns {ImageData}
*/
function processImageDataRGBA (imageData, topX, topY, width, height, radius) {
const pixels = imageData.data;
let x, y, i, p, yp, yi, yw, rSum, gSum, bSum, aSum,
rOutSum, gOutSum, bOutSum, aOutSum,
rInSum, gInSum, bInSum, aInSum,
pr, pg, pb, pa, rbs;
const div = radius + radius + 1;
// const w4 = width << 2;
const widthMinus1 = width - 1;
const heightMinus1 = height - 1;
const radiusPlus1 = radius + 1;
const sumFactor = radiusPlus1 * (radiusPlus1 + 1) / 2;
const stackStart = new BlurStack();
let stack = stackStart;
let stackEnd;
for (i = 1; i < div; i++) {
stack = stack.next = new BlurStack();
if (i === radiusPlus1) {
stackEnd = stack;
}
}
stack.next = stackStart;
let stackIn = null;
let stackOut = null;
yw = yi = 0;
const mulSum = mulTable[radius];
const shgSum = shgTable[radius];
for (y = 0; y < height; y++) {
rInSum = gInSum = bInSum = aInSum = rSum = gSum = bSum = aSum = 0;
rOutSum = radiusPlus1 * (pr = pixels[yi]);
gOutSum = radiusPlus1 * (pg = pixels[yi + 1]);
bOutSum = radiusPlus1 * (pb = pixels[yi + 2]);
aOutSum = radiusPlus1 * (pa = pixels[yi + 3]);
rSum += sumFactor * pr;
gSum += sumFactor * pg;
bSum += sumFactor * pb;
aSum += 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);
rSum += (stack.r = (pr = pixels[p])) * (rbs = radiusPlus1 - i);
gSum += (stack.g = (pg = pixels[p + 1])) * rbs;
bSum += (stack.b = (pb = pixels[p + 2])) * rbs;
aSum += (stack.a = (pa = pixels[p + 3])) * rbs;
rInSum += pr;
gInSum += pg;
bInSum += pb;
aInSum += pa;
stack = stack.next;
}
stackIn = stackStart;
stackOut = stackEnd;
for (x = 0; x < width; x++) {
pixels[yi + 3] = pa = (aSum * mulSum) >> shgSum;
if (pa !== 0) {
pa = 255 / pa;
pixels[yi] = ((rSum * mulSum) >> shgSum) * pa;
pixels[yi + 1] = ((gSum * mulSum) >> shgSum) * pa;
pixels[yi + 2] = ((bSum * mulSum) >> shgSum) * pa;
} else {
pixels[yi] = pixels[yi + 1] = pixels[yi + 2] = 0;
}
rSum -= rOutSum;
gSum -= gOutSum;
bSum -= bOutSum;
aSum -= aOutSum;
rOutSum -= stackIn.r;
gOutSum -= stackIn.g;
bOutSum -= stackIn.b;
aOutSum -= stackIn.a;
p = (yw + ((p = x + radius + 1) < widthMinus1 ? p : widthMinus1)) << 2;
rInSum += (stackIn.r = pixels[p]);
gInSum += (stackIn.g = pixels[p + 1]);
bInSum += (stackIn.b = pixels[p + 2]);
aInSum += (stackIn.a = pixels[p + 3]);
rSum += rInSum;
gSum += gInSum;
bSum += bInSum;
aSum += aInSum;
stackIn = stackIn.next;
rOutSum += (pr = stackOut.r);
gOutSum += (pg = stackOut.g);
bOutSum += (pb = stackOut.b);
aOutSum += (pa = stackOut.a);
rInSum -= pr;
gInSum -= pg;
bInSum -= pb;
aInSum -= pa;
stackOut = stackOut.next;
yi += 4;
}
yw += width;
}
for (x = 0; x < width; x++) {
gInSum = bInSum = aInSum = rInSum = gSum = bSum = aSum = rSum = 0;
yi = x << 2;
rOutSum = radiusPlus1 * (pr = pixels[yi]);
gOutSum = radiusPlus1 * (pg = pixels[yi + 1]);
bOutSum = radiusPlus1 * (pb = pixels[yi + 2]);
aOutSum = radiusPlus1 * (pa = pixels[yi + 3]);
rSum += sumFactor * pr;
gSum += sumFactor * pg;
bSum += sumFactor * pb;
aSum += 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;
rSum += (stack.r = (pr = pixels[yi])) * (rbs = radiusPlus1 - i);
gSum += (stack.g = (pg = pixels[yi + 1])) * rbs;
bSum += (stack.b = (pb = pixels[yi + 2])) * rbs;
aSum += (stack.a = (pa = pixels[yi + 3])) * rbs;
rInSum += pr;
gInSum += pg;
bInSum += pb;
aInSum += 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 = (aSum * mulSum) >> shgSum;
if (pa > 0) {
pa = 255 / pa;
pixels[p] = ((rSum * mulSum) >> shgSum) * pa;
pixels[p + 1] = ((gSum * mulSum) >> shgSum) * pa;
pixels[p + 2] = ((bSum * mulSum) >> shgSum) * pa;
} else {
pixels[p] = pixels[p + 1] = pixels[p + 2] = 0;
}
rSum -= rOutSum;
gSum -= gOutSum;
bSum -= bOutSum;
aSum -= aOutSum;
rOutSum -= stackIn.r;
gOutSum -= stackIn.g;
bOutSum -= stackIn.b;
aOutSum -= stackIn.a;
p = (x + (((p = y + radiusPlus1) < heightMinus1 ? p : heightMinus1) * width)) << 2;
rSum += (rInSum += (stackIn.r = pixels[p]));
gSum += (gInSum += (stackIn.g = pixels[p + 1]));
bSum += (bInSum += (stackIn.b = pixels[p + 2]));
aSum += (aInSum += (stackIn.a = pixels[p + 3]));
stackIn = stackIn.next;
rOutSum += (pr = stackOut.r);
gOutSum += (pg = stackOut.g);
bOutSum += (pb = stackOut.b);
aOutSum += (pa = stackOut.a);
rInSum -= pr;
gInSum -= pg;
bInSum -= pb;
aInSum -= pa;
stackOut = stackOut.next;
yi += width;
}
}
return imageData;
}
/**
* @param {HTMLCanvasElement} canvas
* @param {Integer} topX
* @param {Integer} topY
* @param {Integer} width
* @param {Integer} height
* @param {Float} radius
* @returns {undefined}
*/
function processCanvasRGB (canvas, topX, topY, width, height, radius) {
if (isNaN(radius) || radius < 1) { return; }
radius |= 0;
let imageData = getImageDataFromCanvas(canvas, topX, topY, width, height);
imageData = processImageDataRGB(imageData, topX, topY, width, height, radius);
canvas.getContext('2d').putImageData(imageData, topX, topY);
}
/**
* @param {ImageData} imageData
* @param {Integer} topX
* @param {Integer} topY
* @param {Integer} width
* @param {Integer} height
* @param {Float} radius
* @returns {ImageData}
*/
function processImageDataRGB (imageData, topX, topY, width, height, radius) {
const pixels = imageData.data;
let x, y, i, p, yp, yi, yw, rSum, gSum, bSum,
rOutSum, gOutSum, bOutSum,
rInSum, gInSum, bInSum,
pr, pg, pb, rbs;
const div = radius + radius + 1;
// const w4 = width << 2;
const widthMinus1 = width - 1;
const heightMinus1 = height - 1;
const radiusPlus1 = radius + 1;
const sumFactor = radiusPlus1 * (radiusPlus1 + 1) / 2;
const stackStart = new BlurStack();
let stack = stackStart;
let stackEnd;
for (i = 1; i < div; i++) {
stack = stack.next = new BlurStack();
if (i === radiusPlus1) {
stackEnd = stack;
}
}
stack.next = stackStart;
let stackIn = null;
let stackOut = null;
yw = yi = 0;
const mulSum = mulTable[radius];
const shgSum = shgTable[radius];
for (y = 0; y < height; y++) {
rInSum = gInSum = bInSum = rSum = gSum = bSum = 0;
rOutSum = radiusPlus1 * (pr = pixels[yi]);
gOutSum = radiusPlus1 * (pg = pixels[yi + 1]);
bOutSum = radiusPlus1 * (pb = pixels[yi + 2]);
rSum += sumFactor * pr;
gSum += sumFactor * pg;
bSum += 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);
rSum += (stack.r = (pr = pixels[p])) * (rbs = radiusPlus1 - i);
gSum += (stack.g = (pg = pixels[p + 1])) * rbs;
bSum += (stack.b = (pb = pixels[p + 2])) * rbs;
rInSum += pr;
gInSum += pg;
bInSum += pb;
stack = stack.next;
}
stackIn = stackStart;
stackOut = stackEnd;
for (x = 0; x < width; x++) {
pixels[yi] = (rSum * mulSum) >> shgSum;
pixels[yi + 1] = (gSum * mulSum) >> shgSum;
pixels[yi + 2] = (bSum * mulSum) >> shgSum;
rSum -= rOutSum;
gSum -= gOutSum;
bSum -= bOutSum;
rOutSum -= stackIn.r;
gOutSum -= stackIn.g;
bOutSum -= stackIn.b;
p = (yw + ((p = x + radius + 1) < widthMinus1 ? p : widthMinus1)) << 2;
rInSum += (stackIn.r = pixels[p]);
gInSum += (stackIn.g = pixels[p + 1]);
bInSum += (stackIn.b = pixels[p + 2]);
rSum += rInSum;
gSum += gInSum;
bSum += bInSum;
stackIn = stackIn.next;
rOutSum += (pr = stackOut.r);
gOutSum += (pg = stackOut.g);
bOutSum += (pb = stackOut.b);
rInSum -= pr;
gInSum -= pg;
bInSum -= pb;
stackOut = stackOut.next;
yi += 4;
}
yw += width;
}
for (x = 0; x < width; x++) {
gInSum = bInSum = rInSum = gSum = bSum = rSum = 0;
yi = x << 2;
rOutSum = radiusPlus1 * (pr = pixels[yi]);
gOutSum = radiusPlus1 * (pg = pixels[yi + 1]);
bOutSum = radiusPlus1 * (pb = pixels[yi + 2]);
rSum += sumFactor * pr;
gSum += sumFactor * pg;
bSum += 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;
rSum += (stack.r = (pr = pixels[yi])) * (rbs = radiusPlus1 - i);
gSum += (stack.g = (pg = pixels[yi + 1])) * rbs;
bSum += (stack.b = (pb = pixels[yi + 2])) * rbs;
rInSum += pr;
gInSum += pg;
bInSum += 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] = (rSum * mulSum) >> shgSum;
pixels[p + 1] = (gSum * mulSum) >> shgSum;
pixels[p + 2] = (bSum * mulSum) >> shgSum;
rSum -= rOutSum;
gSum -= gOutSum;
bSum -= bOutSum;
rOutSum -= stackIn.r;
gOutSum -= stackIn.g;
bOutSum -= stackIn.b;
p = (x + (((p = y + radiusPlus1) < heightMinus1 ? p : heightMinus1) * width)) << 2;
rSum += (rInSum += (stackIn.r = pixels[p]));
gSum += (gInSum += (stackIn.g = pixels[p + 1]));
bSum += (bInSum += (stackIn.b = pixels[p + 2]));
stackIn = stackIn.next;
rOutSum += (pr = stackOut.r);
gOutSum += (pg = stackOut.g);
bOutSum += (pb = stackOut.b);
rInSum -= pr;
gInSum -= pg;
bInSum -= pb;
stackOut = stackOut.next;
yi += width;
}
}
return imageData;
}
/**
*
*/
export class BlurStack {
constructor () {
this.r = 0;
this.g = 0;
this.b = 0;
this.a = 0;
this.next = null;
}
}
export {
/**
* @class module:StackBlur.image
* @see module:StackBlur~processImage
*/
processImage as image,
/**
* @class module:StackBlur.canvasRGBA
* @see module:StackBlur~processCanvasRGBA
*/
processCanvasRGBA as canvasRGBA,
/**
* @class module:StackBlur.canvasRGB
* @see module:StackBlur~processCanvasRGB
*/
processCanvasRGB as canvasRGB,
/**
* @class module:StackBlur.imageDataRGBA
* @see module:StackBlur~processImageDataRGBA
*/
processImageDataRGBA as imageDataRGBA,
/**
* @class module:StackBlur.imageDataRGB
* @see module:StackBlur~processImageDataRGB
*/
processImageDataRGB as imageDataRGB
};