| 118 | const blurImage = Blur2(blurfImage); |
| 119 | |
| 120 | function Blur2(blur) { |
| 121 | return function(data, rx, ry = rx) { |
| 122 | if (!((rx = +rx) >= 0)) throw new RangeError("invalid rx"); |
| 123 | if (!((ry = +ry) >= 0)) throw new RangeError("invalid ry"); |
| 124 | let {data: values, width, height} = data; |
| 125 | if (!((width = Math.floor(width)) >= 0)) throw new RangeError("invalid width"); |
| 126 | if (!((height = Math.floor(height !== undefined ? height : values.length / width)) >= 0)) throw new RangeError("invalid height"); |
| 127 | if (!width || !height || (!rx && !ry)) return data; |
| 128 | const blurx = rx && blur(rx); |
| 129 | const blury = ry && blur(ry); |
| 130 | const temp = values.slice(); |
| 131 | if (blurx && blury) { |
| 132 | blurh(blurx, temp, values, width, height); |
| 133 | blurh(blurx, values, temp, width, height); |
| 134 | blurh(blurx, temp, values, width, height); |
| 135 | blurv(blury, values, temp, width, height); |
| 136 | blurv(blury, temp, values, width, height); |
| 137 | blurv(blury, values, temp, width, height); |
| 138 | } else if (blurx) { |
| 139 | blurh(blurx, values, temp, width, height); |
| 140 | blurh(blurx, temp, values, width, height); |
| 141 | blurh(blurx, values, temp, width, height); |
| 142 | } else if (blury) { |
| 143 | blurv(blury, values, temp, width, height); |
| 144 | blurv(blury, temp, values, width, height); |
| 145 | blurv(blury, values, temp, width, height); |
| 146 | } |
| 147 | return data; |
| 148 | }; |
| 149 | } |
| 150 | |
| 151 | function blurh(blur, T, S, w, h) { |
| 152 | for (let y = 0, n = w * h; y < n;) { |