| 1 | "use strict"
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| 2 |
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| 3 | var ndarray = require("ndarray")
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| 4 | var ops = require("ndarray-ops")
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| 5 |
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| 6 | module.exports = function getPixels(url, cb) {
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| 7 | var img = new Image()
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| 8 | img.onload = function() {
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| 9 | var canvas = document.createElement("canvas")
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| 10 | canvas.width = img.width
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| 11 | canvas.height = img.height
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| 12 | var context = canvas.getContext("2d")
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| 13 | context.drawImage(img)
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| 14 | var pixels = context.getImageData(0, 0, img.width, img.height)
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| 15 | var buffer = ndarray.zeros([img.width, img.height, 4], "uint8", [1, 2, 0])
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| 16 | ops.assign(buffer, ndarray.ctor(pixels.data, [img.width, img.height, 4], [4, img.width, 1], 0))
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| 17 | cb(null, buffer)
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| 18 | }
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| 19 | img.onerror = function(err) {
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| 20 | cb(err)
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| 21 | }
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| 22 | img.src = url
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| 23 | }
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