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a collection of channel-level blend modes, à la photoshop (shamelessly lifted from here, via here)
$ npm i blend-mode
var blend = require('blend-mode/soft-light')
// Blends two values, each between 0 and 255
// eg. pixel channel values
blend(0, 255)
var multiply = require('blend-mode/multiply')
var layer1 = [255, 128, 250, 255, 60, ...]
var layer2 = [156, 24, 18, 223, 119, ...]
// Where both layers are Uint8ClampedArrays acquired with
// canvas.getContext('2d').getImageData(0, 0, w, h).data
var blended = []
// Where blended is likely a Uint8ClampedArray acquired with
// canvas.getContext('2d').createImageData(0, 0, w, h).data
var total = Math.min(layer1.length, layer2.length)
for (var i = 0; i < total; i += 4) {
blended[i] = multiply(layer1[i], layer2[i])
blended[i + 1] = multiply(layer1[i + 1], layer2[i + 1])
blended[i + 2] = multiply(layer1[i + 2], layer2[i + 2])
// don’t blend alpha channels
blended[i + 3] = layer1[i + 3]
}
you should really only require the blend-mode/s you actually need, but if you must have the kitchen sink, it will cost you:
compression | size |
---|---|
blend-mode.js | 3.89 kB |
blend-mode.min.js | 2.76 kB |
blend-mode.min.js.gz | 832 B |
let’s just say MIT and hope for the best?
FAQs
a collection of channel-level blend modes, à la photoshop
The npm package blend-mode receives a total of 6 weekly downloads. As such, blend-mode popularity was classified as not popular.
We found that blend-mode demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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