| 1 | "use strict"
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| 2 |
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| 3 | var ndarray = require("ndarray")
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| 4 |
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| 5 | module.exports = function getPixels(url, cb) {
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| 6 | var img = new Image()
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| 7 | img.onload = function() {
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| 8 | var canvas = document.createElement("canvas")
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| 9 | canvas.width = img.width
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| 10 | canvas.height = img.height
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| 11 | var context = canvas.getContext("2d")
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| 12 | context.drawImage(img, 0, 0)
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| 13 | var pixels = context.getImageData(0, 0, img.width, img.height)
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| 14 | cb(null, ndarray(new Uint8Array(pixels.data), [img.height, img.width, 4], [4*img.width, 4, 1], 0))
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| 15 | }
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| 16 | img.onerror = function(err) {
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| 17 | cb(err)
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| 18 | }
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| 19 | img.src = url
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| 20 | }
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