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36 lines
1.0 KiB
JavaScript
36 lines
1.0 KiB
JavaScript
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/* globals document, ImageData */
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const parseFont = require('./lib/parse-font')
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exports.parseFont = parseFont
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exports.createCanvas = function (width, height) {
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return Object.assign(document.createElement('canvas'), { width: width, height: height })
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}
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exports.createImageData = function (array, width, height) {
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// Browser implementation of ImageData looks at the number of arguments passed
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switch (arguments.length) {
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case 0: return new ImageData()
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case 1: return new ImageData(array)
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case 2: return new ImageData(array, width)
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default: return new ImageData(array, width, height)
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}
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}
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exports.loadImage = function (src, options) {
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return new Promise(function (resolve, reject) {
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const image = Object.assign(document.createElement('img'), options)
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function cleanup () {
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image.onload = null
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image.onerror = null
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}
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image.onload = function () { cleanup(); resolve(image) }
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image.onerror = function () { cleanup(); reject(new Error('Failed to load the image "' + src + '"')) }
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image.src = src
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})
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}
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