Marc Wieland
33181acf83
Some checks are pending
Deploy Volleyball CMS / deploy (push) Waiting to run
32 lines
986 B
JavaScript
32 lines
986 B
JavaScript
/* globals document, ImageData */
|
|
|
|
exports.createCanvas = function (width, height) {
|
|
return Object.assign(document.createElement('canvas'), { width: width, height: height })
|
|
}
|
|
|
|
exports.createImageData = function (array, width, height) {
|
|
// Browser implementation of ImageData looks at the number of arguments passed
|
|
switch (arguments.length) {
|
|
case 0: return new ImageData()
|
|
case 1: return new ImageData(array)
|
|
case 2: return new ImageData(array, width)
|
|
default: return new ImageData(array, width, height)
|
|
}
|
|
}
|
|
|
|
exports.loadImage = function (src, options) {
|
|
return new Promise(function (resolve, reject) {
|
|
const image = Object.assign(document.createElement('img'), options)
|
|
|
|
function cleanup () {
|
|
image.onload = null
|
|
image.onerror = null
|
|
}
|
|
|
|
image.onload = function () { cleanup(); resolve(image) }
|
|
image.onerror = function () { cleanup(); reject(new Error('Failed to load the image "' + src + '"')) }
|
|
|
|
image.src = src
|
|
})
|
|
}
|