source: imaps-frontend/node_modules/stackblur-canvas/dist/stackblur.js

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Last change on this file was 79a0317, checked in by stefan toskovski <stefantoska84@…>, 4 days ago

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[79a0317]1(function (global, factory) {
2 typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
3 typeof define === 'function' && define.amd ? define(['exports'], factory) :
4 (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.StackBlur = {}));
5}(this, (function (exports) { 'use strict';
6
7 function _typeof(obj) {
8 "@babel/helpers - typeof";
9
10 if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
11 _typeof = function (obj) {
12 return typeof obj;
13 };
14 } else {
15 _typeof = function (obj) {
16 return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
17 };
18 }
19
20 return _typeof(obj);
21 }
22
23 function _classCallCheck(instance, Constructor) {
24 if (!(instance instanceof Constructor)) {
25 throw new TypeError("Cannot call a class as a function");
26 }
27 }
28
29 /* eslint-disable no-bitwise -- used for calculations */
30
31 /* eslint-disable unicorn/prefer-query-selector -- aiming at
32 backward-compatibility */
33
34 /**
35 * StackBlur - a fast almost Gaussian Blur For Canvas
36 *
37 * In case you find this class useful - especially in commercial projects -
38 * I am not totally unhappy for a small donation to my PayPal account
39 * mario@quasimondo.de
40 *
41 * Or support me on flattr:
42 * {@link https://flattr.com/thing/72791/StackBlur-a-fast-almost-Gaussian-Blur-Effect-for-CanvasJavascript}.
43 *
44 * @module StackBlur
45 * @author Mario Klingemann
46 * Contact: mario@quasimondo.com
47 * Website: {@link http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html}
48 * Twitter: @quasimondo
49 *
50 * @copyright (c) 2010 Mario Klingemann
51 *
52 * Permission is hereby granted, free of charge, to any person
53 * obtaining a copy of this software and associated documentation
54 * files (the "Software"), to deal in the Software without
55 * restriction, including without limitation the rights to use,
56 * copy, modify, merge, publish, distribute, sublicense, and/or sell
57 * copies of the Software, and to permit persons to whom the
58 * Software is furnished to do so, subject to the following
59 * conditions:
60 *
61 * The above copyright notice and this permission notice shall be
62 * included in all copies or substantial portions of the Software.
63 *
64 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
65 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
66 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
67 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
68 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
69 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
70 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
71 * OTHER DEALINGS IN THE SOFTWARE.
72 */
73 var 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];
74 var 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];
75 /**
76 * @param {string|HTMLImageElement} img
77 * @param {string|HTMLCanvasElement} canvas
78 * @param {Float} radius
79 * @param {boolean} blurAlphaChannel
80 * @param {boolean} useOffset
81 * @param {boolean} skipStyles
82 * @returns {undefined}
83 */
84
85 function processImage(img, canvas, radius, blurAlphaChannel, useOffset, skipStyles) {
86 if (typeof img === 'string') {
87 img = document.getElementById(img);
88 }
89
90 if (!img || Object.prototype.toString.call(img).slice(8, -1) === 'HTMLImageElement' && !('naturalWidth' in img)) {
91 return;
92 }
93
94 var dimensionType = useOffset ? 'offset' : 'natural';
95 var w = img[dimensionType + 'Width'];
96 var h = img[dimensionType + 'Height']; // add ImageBitmap support,can blur texture source
97
98 if (Object.prototype.toString.call(img).slice(8, -1) === 'ImageBitmap') {
99 w = img.width;
100 h = img.height;
101 }
102
103 if (typeof canvas === 'string') {
104 canvas = document.getElementById(canvas);
105 }
106
107 if (!canvas || !('getContext' in canvas)) {
108 return;
109 }
110
111 if (!skipStyles) {
112 canvas.style.width = w + 'px';
113 canvas.style.height = h + 'px';
114 }
115
116 canvas.width = w;
117 canvas.height = h;
118 var context = canvas.getContext('2d');
119 context.clearRect(0, 0, w, h);
120 context.drawImage(img, 0, 0, img.naturalWidth, img.naturalHeight, 0, 0, w, h);
121
122 if (isNaN(radius) || radius < 1) {
123 return;
124 }
125
126 if (blurAlphaChannel) {
127 processCanvasRGBA(canvas, 0, 0, w, h, radius);
128 } else {
129 processCanvasRGB(canvas, 0, 0, w, h, radius);
130 }
131 }
132 /**
133 * @param {string|HTMLCanvasElement} canvas
134 * @param {Integer} topX
135 * @param {Integer} topY
136 * @param {Integer} width
137 * @param {Integer} height
138 * @throws {Error|TypeError}
139 * @returns {ImageData} See {@link https://html.spec.whatwg.org/multipage/canvas.html#imagedata}
140 */
141
142
143 function getImageDataFromCanvas(canvas, topX, topY, width, height) {
144 if (typeof canvas === 'string') {
145 canvas = document.getElementById(canvas);
146 }
147
148 if (!canvas || _typeof(canvas) !== 'object' || !('getContext' in canvas)) {
149 throw new TypeError('Expecting canvas with `getContext` method ' + 'in processCanvasRGB(A) calls!');
150 }
151
152 var context = canvas.getContext('2d');
153
154 try {
155 return context.getImageData(topX, topY, width, height);
156 } catch (e) {
157 throw new Error('unable to access image data: ' + e);
158 }
159 }
160 /**
161 * @param {HTMLCanvasElement} canvas
162 * @param {Integer} topX
163 * @param {Integer} topY
164 * @param {Integer} width
165 * @param {Integer} height
166 * @param {Float} radius
167 * @returns {undefined}
168 */
169
170
171 function processCanvasRGBA(canvas, topX, topY, width, height, radius) {
172 if (isNaN(radius) || radius < 1) {
173 return;
174 }
175
176 radius |= 0;
177 var imageData = getImageDataFromCanvas(canvas, topX, topY, width, height);
178 imageData = processImageDataRGBA(imageData, topX, topY, width, height, radius);
179 canvas.getContext('2d').putImageData(imageData, topX, topY);
180 }
181 /**
182 * @param {ImageData} imageData
183 * @param {Integer} topX
184 * @param {Integer} topY
185 * @param {Integer} width
186 * @param {Integer} height
187 * @param {Float} radius
188 * @returns {ImageData}
189 */
190
191
192 function processImageDataRGBA(imageData, topX, topY, width, height, radius) {
193 var pixels = imageData.data;
194 var div = 2 * radius + 1; // const w4 = width << 2;
195
196 var widthMinus1 = width - 1;
197 var heightMinus1 = height - 1;
198 var radiusPlus1 = radius + 1;
199 var sumFactor = radiusPlus1 * (radiusPlus1 + 1) / 2;
200 var stackStart = new BlurStack();
201 var stack = stackStart;
202 var stackEnd;
203
204 for (var i = 1; i < div; i++) {
205 stack = stack.next = new BlurStack();
206
207 if (i === radiusPlus1) {
208 stackEnd = stack;
209 }
210 }
211
212 stack.next = stackStart;
213 var stackIn = null,
214 stackOut = null,
215 yw = 0,
216 yi = 0;
217 var mulSum = mulTable[radius];
218 var shgSum = shgTable[radius];
219
220 for (var y = 0; y < height; y++) {
221 stack = stackStart;
222 var pr = pixels[yi],
223 pg = pixels[yi + 1],
224 pb = pixels[yi + 2],
225 pa = pixels[yi + 3];
226
227 for (var _i = 0; _i < radiusPlus1; _i++) {
228 stack.r = pr;
229 stack.g = pg;
230 stack.b = pb;
231 stack.a = pa;
232 stack = stack.next;
233 }
234
235 var rInSum = 0,
236 gInSum = 0,
237 bInSum = 0,
238 aInSum = 0,
239 rOutSum = radiusPlus1 * pr,
240 gOutSum = radiusPlus1 * pg,
241 bOutSum = radiusPlus1 * pb,
242 aOutSum = radiusPlus1 * pa,
243 rSum = sumFactor * pr,
244 gSum = sumFactor * pg,
245 bSum = sumFactor * pb,
246 aSum = sumFactor * pa;
247
248 for (var _i2 = 1; _i2 < radiusPlus1; _i2++) {
249 var p = yi + ((widthMinus1 < _i2 ? widthMinus1 : _i2) << 2);
250 var r = pixels[p],
251 g = pixels[p + 1],
252 b = pixels[p + 2],
253 a = pixels[p + 3];
254 var rbs = radiusPlus1 - _i2;
255 rSum += (stack.r = r) * rbs;
256 gSum += (stack.g = g) * rbs;
257 bSum += (stack.b = b) * rbs;
258 aSum += (stack.a = a) * rbs;
259 rInSum += r;
260 gInSum += g;
261 bInSum += b;
262 aInSum += a;
263 stack = stack.next;
264 }
265
266 stackIn = stackStart;
267 stackOut = stackEnd;
268
269 for (var x = 0; x < width; x++) {
270 var paInitial = aSum * mulSum >>> shgSum;
271 pixels[yi + 3] = paInitial;
272
273 if (paInitial !== 0) {
274 var _a2 = 255 / paInitial;
275
276 pixels[yi] = (rSum * mulSum >>> shgSum) * _a2;
277 pixels[yi + 1] = (gSum * mulSum >>> shgSum) * _a2;
278 pixels[yi + 2] = (bSum * mulSum >>> shgSum) * _a2;
279 } else {
280 pixels[yi] = pixels[yi + 1] = pixels[yi + 2] = 0;
281 }
282
283 rSum -= rOutSum;
284 gSum -= gOutSum;
285 bSum -= bOutSum;
286 aSum -= aOutSum;
287 rOutSum -= stackIn.r;
288 gOutSum -= stackIn.g;
289 bOutSum -= stackIn.b;
290 aOutSum -= stackIn.a;
291
292 var _p = x + radius + 1;
293
294 _p = yw + (_p < widthMinus1 ? _p : widthMinus1) << 2;
295 rInSum += stackIn.r = pixels[_p];
296 gInSum += stackIn.g = pixels[_p + 1];
297 bInSum += stackIn.b = pixels[_p + 2];
298 aInSum += stackIn.a = pixels[_p + 3];
299 rSum += rInSum;
300 gSum += gInSum;
301 bSum += bInSum;
302 aSum += aInSum;
303 stackIn = stackIn.next;
304 var _stackOut = stackOut,
305 _r = _stackOut.r,
306 _g = _stackOut.g,
307 _b = _stackOut.b,
308 _a = _stackOut.a;
309 rOutSum += _r;
310 gOutSum += _g;
311 bOutSum += _b;
312 aOutSum += _a;
313 rInSum -= _r;
314 gInSum -= _g;
315 bInSum -= _b;
316 aInSum -= _a;
317 stackOut = stackOut.next;
318 yi += 4;
319 }
320
321 yw += width;
322 }
323
324 for (var _x = 0; _x < width; _x++) {
325 yi = _x << 2;
326
327 var _pr = pixels[yi],
328 _pg = pixels[yi + 1],
329 _pb = pixels[yi + 2],
330 _pa = pixels[yi + 3],
331 _rOutSum = radiusPlus1 * _pr,
332 _gOutSum = radiusPlus1 * _pg,
333 _bOutSum = radiusPlus1 * _pb,
334 _aOutSum = radiusPlus1 * _pa,
335 _rSum = sumFactor * _pr,
336 _gSum = sumFactor * _pg,
337 _bSum = sumFactor * _pb,
338 _aSum = sumFactor * _pa;
339
340 stack = stackStart;
341
342 for (var _i3 = 0; _i3 < radiusPlus1; _i3++) {
343 stack.r = _pr;
344 stack.g = _pg;
345 stack.b = _pb;
346 stack.a = _pa;
347 stack = stack.next;
348 }
349
350 var yp = width;
351 var _gInSum = 0,
352 _bInSum = 0,
353 _aInSum = 0,
354 _rInSum = 0;
355
356 for (var _i4 = 1; _i4 <= radius; _i4++) {
357 yi = yp + _x << 2;
358
359 var _rbs = radiusPlus1 - _i4;
360
361 _rSum += (stack.r = _pr = pixels[yi]) * _rbs;
362 _gSum += (stack.g = _pg = pixels[yi + 1]) * _rbs;
363 _bSum += (stack.b = _pb = pixels[yi + 2]) * _rbs;
364 _aSum += (stack.a = _pa = pixels[yi + 3]) * _rbs;
365 _rInSum += _pr;
366 _gInSum += _pg;
367 _bInSum += _pb;
368 _aInSum += _pa;
369 stack = stack.next;
370
371 if (_i4 < heightMinus1) {
372 yp += width;
373 }
374 }
375
376 yi = _x;
377 stackIn = stackStart;
378 stackOut = stackEnd;
379
380 for (var _y = 0; _y < height; _y++) {
381 var _p2 = yi << 2;
382
383 pixels[_p2 + 3] = _pa = _aSum * mulSum >>> shgSum;
384
385 if (_pa > 0) {
386 _pa = 255 / _pa;
387 pixels[_p2] = (_rSum * mulSum >>> shgSum) * _pa;
388 pixels[_p2 + 1] = (_gSum * mulSum >>> shgSum) * _pa;
389 pixels[_p2 + 2] = (_bSum * mulSum >>> shgSum) * _pa;
390 } else {
391 pixels[_p2] = pixels[_p2 + 1] = pixels[_p2 + 2] = 0;
392 }
393
394 _rSum -= _rOutSum;
395 _gSum -= _gOutSum;
396 _bSum -= _bOutSum;
397 _aSum -= _aOutSum;
398 _rOutSum -= stackIn.r;
399 _gOutSum -= stackIn.g;
400 _bOutSum -= stackIn.b;
401 _aOutSum -= stackIn.a;
402 _p2 = _x + ((_p2 = _y + radiusPlus1) < heightMinus1 ? _p2 : heightMinus1) * width << 2;
403 _rSum += _rInSum += stackIn.r = pixels[_p2];
404 _gSum += _gInSum += stackIn.g = pixels[_p2 + 1];
405 _bSum += _bInSum += stackIn.b = pixels[_p2 + 2];
406 _aSum += _aInSum += stackIn.a = pixels[_p2 + 3];
407 stackIn = stackIn.next;
408 _rOutSum += _pr = stackOut.r;
409 _gOutSum += _pg = stackOut.g;
410 _bOutSum += _pb = stackOut.b;
411 _aOutSum += _pa = stackOut.a;
412 _rInSum -= _pr;
413 _gInSum -= _pg;
414 _bInSum -= _pb;
415 _aInSum -= _pa;
416 stackOut = stackOut.next;
417 yi += width;
418 }
419 }
420
421 return imageData;
422 }
423 /**
424 * @param {HTMLCanvasElement} canvas
425 * @param {Integer} topX
426 * @param {Integer} topY
427 * @param {Integer} width
428 * @param {Integer} height
429 * @param {Float} radius
430 * @returns {undefined}
431 */
432
433
434 function processCanvasRGB(canvas, topX, topY, width, height, radius) {
435 if (isNaN(radius) || radius < 1) {
436 return;
437 }
438
439 radius |= 0;
440 var imageData = getImageDataFromCanvas(canvas, topX, topY, width, height);
441 imageData = processImageDataRGB(imageData, topX, topY, width, height, radius);
442 canvas.getContext('2d').putImageData(imageData, topX, topY);
443 }
444 /**
445 * @param {ImageData} imageData
446 * @param {Integer} topX
447 * @param {Integer} topY
448 * @param {Integer} width
449 * @param {Integer} height
450 * @param {Float} radius
451 * @returns {ImageData}
452 */
453
454
455 function processImageDataRGB(imageData, topX, topY, width, height, radius) {
456 var pixels = imageData.data;
457 var div = 2 * radius + 1; // const w4 = width << 2;
458
459 var widthMinus1 = width - 1;
460 var heightMinus1 = height - 1;
461 var radiusPlus1 = radius + 1;
462 var sumFactor = radiusPlus1 * (radiusPlus1 + 1) / 2;
463 var stackStart = new BlurStack();
464 var stack = stackStart;
465 var stackEnd;
466
467 for (var i = 1; i < div; i++) {
468 stack = stack.next = new BlurStack();
469
470 if (i === radiusPlus1) {
471 stackEnd = stack;
472 }
473 }
474
475 stack.next = stackStart;
476 var stackIn = null;
477 var stackOut = null;
478 var mulSum = mulTable[radius];
479 var shgSum = shgTable[radius];
480 var p, rbs;
481 var yw = 0,
482 yi = 0;
483
484 for (var y = 0; y < height; y++) {
485 var pr = pixels[yi],
486 pg = pixels[yi + 1],
487 pb = pixels[yi + 2],
488 rOutSum = radiusPlus1 * pr,
489 gOutSum = radiusPlus1 * pg,
490 bOutSum = radiusPlus1 * pb,
491 rSum = sumFactor * pr,
492 gSum = sumFactor * pg,
493 bSum = sumFactor * pb;
494 stack = stackStart;
495
496 for (var _i5 = 0; _i5 < radiusPlus1; _i5++) {
497 stack.r = pr;
498 stack.g = pg;
499 stack.b = pb;
500 stack = stack.next;
501 }
502
503 var rInSum = 0,
504 gInSum = 0,
505 bInSum = 0;
506
507 for (var _i6 = 1; _i6 < radiusPlus1; _i6++) {
508 p = yi + ((widthMinus1 < _i6 ? widthMinus1 : _i6) << 2);
509 rSum += (stack.r = pr = pixels[p]) * (rbs = radiusPlus1 - _i6);
510 gSum += (stack.g = pg = pixels[p + 1]) * rbs;
511 bSum += (stack.b = pb = pixels[p + 2]) * rbs;
512 rInSum += pr;
513 gInSum += pg;
514 bInSum += pb;
515 stack = stack.next;
516 }
517
518 stackIn = stackStart;
519 stackOut = stackEnd;
520
521 for (var x = 0; x < width; x++) {
522 pixels[yi] = rSum * mulSum >>> shgSum;
523 pixels[yi + 1] = gSum * mulSum >>> shgSum;
524 pixels[yi + 2] = bSum * mulSum >>> shgSum;
525 rSum -= rOutSum;
526 gSum -= gOutSum;
527 bSum -= bOutSum;
528 rOutSum -= stackIn.r;
529 gOutSum -= stackIn.g;
530 bOutSum -= stackIn.b;
531 p = yw + ((p = x + radius + 1) < widthMinus1 ? p : widthMinus1) << 2;
532 rInSum += stackIn.r = pixels[p];
533 gInSum += stackIn.g = pixels[p + 1];
534 bInSum += stackIn.b = pixels[p + 2];
535 rSum += rInSum;
536 gSum += gInSum;
537 bSum += bInSum;
538 stackIn = stackIn.next;
539 rOutSum += pr = stackOut.r;
540 gOutSum += pg = stackOut.g;
541 bOutSum += pb = stackOut.b;
542 rInSum -= pr;
543 gInSum -= pg;
544 bInSum -= pb;
545 stackOut = stackOut.next;
546 yi += 4;
547 }
548
549 yw += width;
550 }
551
552 for (var _x2 = 0; _x2 < width; _x2++) {
553 yi = _x2 << 2;
554
555 var _pr2 = pixels[yi],
556 _pg2 = pixels[yi + 1],
557 _pb2 = pixels[yi + 2],
558 _rOutSum2 = radiusPlus1 * _pr2,
559 _gOutSum2 = radiusPlus1 * _pg2,
560 _bOutSum2 = radiusPlus1 * _pb2,
561 _rSum2 = sumFactor * _pr2,
562 _gSum2 = sumFactor * _pg2,
563 _bSum2 = sumFactor * _pb2;
564
565 stack = stackStart;
566
567 for (var _i7 = 0; _i7 < radiusPlus1; _i7++) {
568 stack.r = _pr2;
569 stack.g = _pg2;
570 stack.b = _pb2;
571 stack = stack.next;
572 }
573
574 var _rInSum2 = 0,
575 _gInSum2 = 0,
576 _bInSum2 = 0;
577
578 for (var _i8 = 1, yp = width; _i8 <= radius; _i8++) {
579 yi = yp + _x2 << 2;
580 _rSum2 += (stack.r = _pr2 = pixels[yi]) * (rbs = radiusPlus1 - _i8);
581 _gSum2 += (stack.g = _pg2 = pixels[yi + 1]) * rbs;
582 _bSum2 += (stack.b = _pb2 = pixels[yi + 2]) * rbs;
583 _rInSum2 += _pr2;
584 _gInSum2 += _pg2;
585 _bInSum2 += _pb2;
586 stack = stack.next;
587
588 if (_i8 < heightMinus1) {
589 yp += width;
590 }
591 }
592
593 yi = _x2;
594 stackIn = stackStart;
595 stackOut = stackEnd;
596
597 for (var _y2 = 0; _y2 < height; _y2++) {
598 p = yi << 2;
599 pixels[p] = _rSum2 * mulSum >>> shgSum;
600 pixels[p + 1] = _gSum2 * mulSum >>> shgSum;
601 pixels[p + 2] = _bSum2 * mulSum >>> shgSum;
602 _rSum2 -= _rOutSum2;
603 _gSum2 -= _gOutSum2;
604 _bSum2 -= _bOutSum2;
605 _rOutSum2 -= stackIn.r;
606 _gOutSum2 -= stackIn.g;
607 _bOutSum2 -= stackIn.b;
608 p = _x2 + ((p = _y2 + radiusPlus1) < heightMinus1 ? p : heightMinus1) * width << 2;
609 _rSum2 += _rInSum2 += stackIn.r = pixels[p];
610 _gSum2 += _gInSum2 += stackIn.g = pixels[p + 1];
611 _bSum2 += _bInSum2 += stackIn.b = pixels[p + 2];
612 stackIn = stackIn.next;
613 _rOutSum2 += _pr2 = stackOut.r;
614 _gOutSum2 += _pg2 = stackOut.g;
615 _bOutSum2 += _pb2 = stackOut.b;
616 _rInSum2 -= _pr2;
617 _gInSum2 -= _pg2;
618 _bInSum2 -= _pb2;
619 stackOut = stackOut.next;
620 yi += width;
621 }
622 }
623
624 return imageData;
625 }
626 /**
627 *
628 */
629
630
631 var BlurStack =
632 /**
633 * Set properties.
634 */
635 function BlurStack() {
636 _classCallCheck(this, BlurStack);
637
638 this.r = 0;
639 this.g = 0;
640 this.b = 0;
641 this.a = 0;
642 this.next = null;
643 };
644
645 exports.BlurStack = BlurStack;
646 exports.canvasRGB = processCanvasRGB;
647 exports.canvasRGBA = processCanvasRGBA;
648 exports.image = processImage;
649 exports.imageDataRGB = processImageDataRGB;
650 exports.imageDataRGBA = processImageDataRGBA;
651
652 Object.defineProperty(exports, '__esModule', { value: true });
653
654})));
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