mirror of
https://github.com/snipe/snipe-it.git
synced 2024-12-28 23:19:42 -08:00
93 lines
2.8 KiB
JavaScript
93 lines
2.8 KiB
JavaScript
/*
|
|
* JavaScript Canvas to Blob Test
|
|
* https://github.com/blueimp/JavaScript-Canvas-to-Blob
|
|
*
|
|
* Copyright 2012, Sebastian Tschan
|
|
* https://blueimp.net
|
|
*
|
|
* Licensed under the MIT license:
|
|
* http://www.opensource.org/licenses/MIT
|
|
*/
|
|
|
|
/* global describe, it, Blob */
|
|
|
|
;(function (expect) {
|
|
'use strict'
|
|
|
|
// 80x60px GIF image (color black, base64 data):
|
|
var b64Data = 'R0lGODdhUAA8AIABAAAAAP///ywAAAAAUAA8AAACS4SPqcvtD6' +
|
|
'OctNqLs968+w+G4kiW5omm6sq27gvH8kzX9o3n+s73/g8MCofE' +
|
|
'ovGITCqXzKbzCY1Kp9Sq9YrNarfcrvcLDovH5PKsAAA7'
|
|
var imageUrl = 'data:image/gif;base64,' + b64Data
|
|
var blob = window.dataURLtoBlob && window.dataURLtoBlob(imageUrl)
|
|
|
|
describe('canvas.toBlob', function () {
|
|
it('Converts a canvas element to a blob and passes it to the callback function', function (done) {
|
|
window.loadImage(blob, function (canvas) {
|
|
canvas.toBlob(
|
|
function (newBlob) {
|
|
expect(newBlob).to.be.a.instanceOf(Blob)
|
|
done()
|
|
}
|
|
)
|
|
}, {canvas: true})
|
|
})
|
|
|
|
it('Converts a canvas element to a PNG blob', function (done) {
|
|
window.loadImage(blob, function (canvas) {
|
|
canvas.toBlob(
|
|
function (newBlob) {
|
|
expect(newBlob.type).to.equal('image/png')
|
|
done()
|
|
},
|
|
'image/png'
|
|
)
|
|
}, {canvas: true})
|
|
})
|
|
|
|
it('Converts a canvas element to a JPG blob', function (done) {
|
|
window.loadImage(blob, function (canvas) {
|
|
canvas.toBlob(
|
|
function (newBlob) {
|
|
expect(newBlob.type).to.equal('image/jpeg')
|
|
done()
|
|
},
|
|
'image/jpeg'
|
|
)
|
|
}, {canvas: true})
|
|
})
|
|
|
|
it('Keeps the aspect ratio of the canvas image', function (done) {
|
|
window.loadImage(blob, function (canvas) {
|
|
canvas.toBlob(
|
|
function (newBlob) {
|
|
window.loadImage(newBlob, function (img) {
|
|
expect(img.width).to.equal(canvas.width)
|
|
expect(img.height).to.equal(canvas.height)
|
|
done()
|
|
})
|
|
}
|
|
)
|
|
}, {canvas: true})
|
|
})
|
|
|
|
it('Keeps the image data of the canvas image', function (done) {
|
|
window.loadImage(blob, function (canvas) {
|
|
canvas.toBlob(
|
|
function (newBlob) {
|
|
window.loadImage(newBlob, function (newCanvas) {
|
|
var canvasData = canvas.getContext('2d')
|
|
.getImageData(0, 0, canvas.width, canvas.height)
|
|
var newCanvasData = newCanvas.getContext('2d')
|
|
.getImageData(0, 0, newCanvas.width, newCanvas.height)
|
|
expect(canvasData.width).to.equal(newCanvasData.width)
|
|
expect(canvasData.height).to.equal(newCanvasData.height)
|
|
done()
|
|
}, {canvas: true})
|
|
}
|
|
)
|
|
}, {canvas: true})
|
|
})
|
|
})
|
|
}(this.chai.expect))
|