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540 lines
19 KiB
JavaScript
540 lines
19 KiB
JavaScript
/*
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* JavaScript Load Image Test
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* https://github.com/blueimp/JavaScript-Load-Image
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*
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* Copyright 2011, Sebastian Tschan
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* https://blueimp.net
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*
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* Licensed under the MIT license:
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* http://www.opensource.org/licenses/MIT
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*/
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/* global describe, it, Blob */
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;(function (expect, loadImage) {
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'use strict'
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var canCreateBlob = !!window.dataURLtoBlob
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// 80x60px GIF image (color black, base64 data):
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var b64DataGIF = 'R0lGODdhUAA8AIABAAAAAP///ywAAAAAUAA8AAACS4SPqcvtD6' +
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'OctNqLs968+w+G4kiW5omm6sq27gvH8kzX9o3n+s73/g8MCofE' +
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'ovGITCqXzKbzCY1Kp9Sq9YrNarfcrvcLDovH5PKsAAA7'
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var imageUrlGIF = 'data:image/gif;base64,' + b64DataGIF
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var blobGIF = canCreateBlob && window.dataURLtoBlob(imageUrlGIF)
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// 2x1px JPEG (color white, with the Exif orientation flag set to 6):
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var b64DataJPEG = '/9j/4AAQSkZJRgABAQEAYABgAAD/4QAiRXhpZgAASUkqAAgAAA' +
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'ABABIBAwABAAAABgASAAAAAAD/2wBDAAEBAQEBAQEBAQEBAQEB' +
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'AQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQ' +
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'EBAQEBAQEBAQEBAQH/2wBDAQEBAQEBAQEBAQEBAQEBAQEBAQEB' +
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'AQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQ' +
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'EBAQEBAQH/wAARCAABAAIDASIAAhEBAxEB/8QAHwAAAQUBAQEB' +
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'AQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBA' +
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'QAAAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAk' +
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'M2JyggkKFhcYGRolJicoKSo0NTY3ODk6Q0RFRkdISUpTVFVWV1' +
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'hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKj' +
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'pKWmp6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+' +
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'Tl5ufo6erx8vP09fb3+Pn6/8QAHwEAAwEBAQEBAQEBAQAAAAAA' +
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'AAECAwQFBgcICQoL/8QAtREAAgECBAQDBAcFBAQAAQJ3AAECAx' +
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'EEBSExBhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYkNOEl' +
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'8RcYGRomJygpKjU2Nzg5OkNERUZHSElKU1RVVldYWVpjZGVmZ2' +
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'hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmq' +
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'srO0tba3uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8v' +
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'P09fb3+Pn6/9oADAMBAAIRAxEAPwD+/iiiigD/2Q=='
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var imageUrlJPEG = 'data:image/jpeg;base64,' + b64DataJPEG
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var blobJPEG = canCreateBlob && window.dataURLtoBlob(imageUrlJPEG)
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function createBlob (data, type) {
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try {
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return new Blob([data], {type: type})
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} catch (e) {
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var BlobBuilder = window.BlobBuilder || window.WebKitBlobBuilder ||
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window.MozBlobBuilder || window.MSBlobBuilder
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var builder = new BlobBuilder()
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builder.append(data.buffer || data)
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return builder.getBlob(type)
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}
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}
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describe('Loading', function () {
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it('Return the img element or FileReader object to allow aborting the image load', function () {
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var img = loadImage(blobGIF, function () {
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return
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})
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expect(img).to.be.an.instanceOf(Object)
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expect(img.onload).to.be.a('function')
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expect(img.onerror).to.be.a('function')
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})
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it('Load image url', function (done) {
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expect(loadImage(imageUrlGIF, function (img) {
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expect(img.width).to.equal(80)
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expect(img.height).to.equal(60)
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done()
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})).to.be.ok
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})
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it('Load image blob', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(80)
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expect(img.height).to.equal(60)
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done()
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})).to.be.ok
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})
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it('Return image loading error to callback', function (done) {
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expect(loadImage('404', function (img) {
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expect(img).to.be.an.instanceOf(window.Event)
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expect(img.type).to.equal('error')
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done()
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})).to.be.ok
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})
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it('Keep object URL if noRevoke is true', function (done) {
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expect(loadImage(blobGIF, function (img) {
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loadImage(img.src, function (img2) {
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expect(img.width).to.equal(img2.width)
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expect(img.height).to.equal(img2.height)
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done()
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})
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}, {noRevoke: true})).to.be.ok
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})
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it('Discard object URL if noRevoke is undefined or false', function (done) {
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expect(loadImage(blobGIF, function (img) {
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loadImage(img.src, function (img2) {
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if (!window.callPhantom) {
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// revokeObjectUrl doesn't seem to have an effect in PhantomJS
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expect(img2).to.be.an.instanceOf(window.Event)
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expect(img2.type).to.equal('error')
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}
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done()
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})
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})).to.be.ok
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})
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})
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describe('Scaling', function () {
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describe('max/min', function () {
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it('Scale to maxWidth', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(40)
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expect(img.height).to.equal(30)
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done()
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}, {maxWidth: 40})).to.be.ok
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})
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it('Scale to maxHeight', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(20)
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expect(img.height).to.equal(15)
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done()
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}, {maxHeight: 15})).to.be.ok
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})
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it('Scale to minWidth', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(160)
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expect(img.height).to.equal(120)
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done()
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}, {minWidth: 160})).to.be.ok
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})
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it('Scale to minHeight', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(320)
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expect(img.height).to.equal(240)
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done()
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}, {minHeight: 240})).to.be.ok
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})
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it('Scale to minWidth but respect maxWidth', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(160)
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expect(img.height).to.equal(120)
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done()
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}, {minWidth: 240, maxWidth: 160})).to.be.ok
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})
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it('Scale to minHeight but respect maxHeight', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(160)
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expect(img.height).to.equal(120)
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done()
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}, {minHeight: 180, maxHeight: 120})).to.be.ok
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})
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it('Scale to minWidth but respect maxHeight', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(160)
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expect(img.height).to.equal(120)
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done()
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}, {minWidth: 240, maxHeight: 120})).to.be.ok
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})
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it('Scale to minHeight but respect maxWidth', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(160)
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expect(img.height).to.equal(120)
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done()
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}, {minHeight: 180, maxWidth: 160})).to.be.ok
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})
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it('Scale up with the given pixelRatio', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(320)
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expect(img.height).to.equal(240)
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expect(img.style.width).to.equal('160px')
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expect(img.style.height).to.equal('120px')
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done()
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}, {minWidth: 160, canvas: true, pixelRatio: 2})).to.be.ok
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})
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it('Scale down with the given pixelRatio', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(80)
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expect(img.height).to.equal(60)
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expect(img.style.width).to.equal('40px')
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expect(img.style.height).to.equal('30px')
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done()
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}, {maxWidth: 40, canvas: true, pixelRatio: 2})).to.be.ok
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})
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it('Scale down with the given downsamplingRatio', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(20)
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expect(img.height).to.equal(15)
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done()
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}, {maxWidth: 20, canvas: true, downsamplingRatio: 0.5})).to.be.ok
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})
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it('Ignore max settings if image dimensions are smaller', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(80)
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expect(img.height).to.equal(60)
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done()
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}, {maxWidth: 160, maxHeight: 120})).to.be.ok
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})
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it('Ignore min settings if image dimensions are larger', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(80)
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expect(img.height).to.equal(60)
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done()
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}, {minWidth: 40, minHeight: 30})).to.be.ok
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})
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})
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describe('contain', function () {
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it('Scale up to contain image in max dimensions', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(160)
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expect(img.height).to.equal(120)
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done()
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}, {maxWidth: 160, maxHeight: 160, contain: true})).to.be.ok
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})
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it('Scale down to contain image in max dimensions', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(40)
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expect(img.height).to.equal(30)
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done()
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}, {maxWidth: 40, maxHeight: 40, contain: true})).to.be.ok
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})
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})
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describe('cover', function () {
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it('Scale up to cover max dimensions with image dimensions', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(160)
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expect(img.height).to.equal(120)
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done()
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}, {maxWidth: 120, maxHeight: 120, cover: true})).to.be.ok
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})
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it('Scale down to cover max dimensions with image dimensions', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(40)
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expect(img.height).to.equal(30)
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done()
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}, {maxWidth: 30, maxHeight: 30, cover: true})).to.be.ok
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})
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})
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})
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describe('Cropping', function () {
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it('Crop to same values for maxWidth and maxHeight', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(40)
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expect(img.height).to.equal(40)
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done()
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}, {maxWidth: 40, maxHeight: 40, crop: true})).to.be.ok
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})
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it('Crop to different values for maxWidth and maxHeight', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(40)
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expect(img.height).to.equal(60)
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done()
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}, {maxWidth: 40, maxHeight: 60, crop: true})).to.be.ok
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})
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it('Crop using the given sourceWidth and sourceHeight dimensions', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(40)
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expect(img.height).to.equal(40)
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done()
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}, {sourceWidth: 40, sourceHeight: 40, crop: true})).to.be.ok
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})
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it('Crop using the given left and top coordinates', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(40)
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expect(img.height).to.equal(20)
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done()
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}, {left: 40, top: 40, crop: true})).to.be.ok
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})
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it('Crop using the given right and bottom coordinates', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(40)
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expect(img.height).to.equal(20)
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done()
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}, {right: 40, bottom: 40, crop: true})).to.be.ok
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})
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it('Crop using the given 2:1 aspectRatio', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(80)
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expect(img.height).to.equal(40)
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done()
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}, {aspectRatio: 2})).to.be.ok
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})
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it('Crop using the given 2:3 aspectRatio', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(40)
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expect(img.height).to.equal(60)
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done()
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}, {aspectRatio: 2 / 3})).to.be.ok
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})
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it('Crop using maxWidth/maxHeight with the given pixelRatio', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(80)
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expect(img.height).to.equal(80)
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expect(img.style.width).to.equal('40px')
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expect(img.style.height).to.equal('40px')
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done()
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}, {maxWidth: 40, maxHeight: 40, crop: true, pixelRatio: 2})).to.be.ok
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})
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it('Crop using sourceWidth/sourceHeight with the given pixelRatio', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(80)
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expect(img.height).to.equal(80)
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expect(img.style.width).to.equal('40px')
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expect(img.style.height).to.equal('40px')
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done()
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}, {sourceWidth: 40, sourceHeight: 40, crop: true, pixelRatio: 2})).to.be.ok
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})
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})
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describe('Orientation', function () {
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it('Should keep the orientation', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(80)
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expect(img.height).to.equal(60)
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done()
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}, {orientation: 1})).to.be.ok
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})
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it('Should rotate left', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(60)
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expect(img.height).to.equal(80)
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done()
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}, {orientation: 8})).to.be.ok
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})
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it('Should rotate right', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(60)
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expect(img.height).to.equal(80)
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done()
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}, {orientation: 6})).to.be.ok
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})
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it('Should adjust constraints to new coordinates', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(30)
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expect(img.height).to.equal(40)
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done()
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}, {orientation: 6, maxWidth: 30, maxHeight: 40})).to.be.ok
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})
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it('Should adjust left and top to new coordinates', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(30)
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expect(img.height).to.equal(60)
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done()
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}, {orientation: 5, left: 30, top: 20})).to.be.ok
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})
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it('Should adjust right and bottom to new coordinates', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(30)
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expect(img.height).to.equal(60)
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done()
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}, {orientation: 5, right: 30, bottom: 20})).to.be.ok
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})
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it('Should adjust left and bottom to new coordinates', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(30)
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expect(img.height).to.equal(60)
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done()
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}, {orientation: 7, left: 30, bottom: 20})).to.be.ok
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})
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it('Should adjust right and top to new coordinates', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(30)
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expect(img.height).to.equal(60)
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done()
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}, {orientation: 7, right: 30, top: 20})).to.be.ok
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})
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it('Should rotate left with the given pixelRatio', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(120)
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expect(img.height).to.equal(160)
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expect(img.style.width).to.equal('60px')
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expect(img.style.height).to.equal('80px')
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done()
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}, {orientation: 8, pixelRatio: 2})).to.be.ok
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})
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it('Should rotate right with the given pixelRatio', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(120)
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expect(img.height).to.equal(160)
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expect(img.style.width).to.equal('60px')
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expect(img.style.height).to.equal('80px')
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done()
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}, {orientation: 6, pixelRatio: 2})).to.be.ok
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})
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it('Should ignore too small orientation value', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(80)
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expect(img.height).to.equal(60)
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done()
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}, {orientation: -1})).to.be.ok
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})
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it('Should ignore too large orientation value', function (done) {
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expect(loadImage(blobGIF, function (img) {
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expect(img.width).to.equal(80)
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expect(img.height).to.equal(60)
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done()
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}, {orientation: 9})).to.be.ok
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})
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it('Should rotate right based on the exif orientation value', function (done) {
|
|
expect(loadImage(blobJPEG, function (img, data) {
|
|
expect(data).to.be.ok
|
|
expect(data.exif).to.be.ok
|
|
expect(data.exif.get('Orientation')).to.equal(6)
|
|
expect(img.width).to.equal(1)
|
|
expect(img.height).to.equal(2)
|
|
done()
|
|
}, {orientation: true})).to.be.ok
|
|
})
|
|
|
|
it('Should adjust constraints based on the exif orientation value', function (done) {
|
|
expect(loadImage(blobJPEG, function (img) {
|
|
expect(img.width).to.equal(10)
|
|
expect(img.height).to.equal(20)
|
|
done()
|
|
}, {orientation: true, minWidth: 10, minHeight: 20})).to.be.ok
|
|
})
|
|
})
|
|
|
|
describe('Canvas', function () {
|
|
it('Return img element to callback if canvas is not true', function (done) {
|
|
expect(loadImage(blobGIF, function (img) {
|
|
expect(img.getContext).to.not.be.ok
|
|
expect(img.nodeName.toLowerCase()).to.equal('img')
|
|
done()
|
|
})).to.be.ok
|
|
})
|
|
|
|
it('Return canvas element to callback if canvas is true', function (done) {
|
|
expect(loadImage(blobGIF, function (img) {
|
|
expect(img.getContext).to.be.ok
|
|
expect(img.nodeName.toLowerCase()).to.equal('canvas')
|
|
done()
|
|
}, {canvas: true})).to.be.ok
|
|
})
|
|
|
|
it('Return scaled canvas element to callback', function (done) {
|
|
expect(loadImage(blobGIF, function (img) {
|
|
expect(img.getContext).to.be.ok
|
|
expect(img.nodeName.toLowerCase()).to.equal('canvas')
|
|
expect(img.width).to.equal(40)
|
|
expect(img.height).to.equal(30)
|
|
done()
|
|
}, {canvas: true, maxWidth: 40})).to.be.ok
|
|
})
|
|
|
|
it('Accept a canvas element as parameter for loadImage.scale', function (done) {
|
|
expect(loadImage(blobGIF, function (img) {
|
|
img = loadImage.scale(img, {
|
|
maxWidth: 40
|
|
})
|
|
expect(img.getContext).to.be.ok
|
|
expect(img.nodeName.toLowerCase()).to.equal('canvas')
|
|
expect(img.width).to.equal(40)
|
|
expect(img.height).to.equal(30)
|
|
done()
|
|
}, {canvas: true})).to.be.ok
|
|
})
|
|
})
|
|
|
|
describe('Metadata', function () {
|
|
it('Should parse Exif information', function (done) {
|
|
loadImage.parseMetaData(blobJPEG, function (data) {
|
|
expect(data.exif).to.be.ok
|
|
expect(data.exif.get('Orientation')).to.equal(6)
|
|
done()
|
|
})
|
|
})
|
|
|
|
it('Should parse the complete image head', function (done) {
|
|
loadImage.parseMetaData(blobJPEG, function (data) {
|
|
expect(data.imageHead).to.be.ok
|
|
loadImage.parseMetaData(
|
|
createBlob(data.imageHead, 'image/jpeg'),
|
|
function (data) {
|
|
expect(data.exif).to.be.ok
|
|
expect(data.exif.get('Orientation')).to.equal(6)
|
|
done()
|
|
}
|
|
)
|
|
})
|
|
})
|
|
|
|
it('Should parse meta data automatically', function (done) {
|
|
expect(loadImage(blobJPEG, function (img, data) {
|
|
expect(data).to.be.ok
|
|
expect(data.imageHead).to.be.ok
|
|
expect(data.exif).to.be.ok
|
|
expect(data.exif.get('Orientation')).to.equal(6)
|
|
done()
|
|
}, {meta: true})).to.be.ok
|
|
})
|
|
})
|
|
}(
|
|
this.chai.expect,
|
|
this.loadImage
|
|
))
|