зеркало из https://github.com/mozilla/gecko-dev.git
155 строки
4.3 KiB
JavaScript
155 строки
4.3 KiB
JavaScript
/* Any copyright is dedicated to the public domain.
|
|
http://creativecommons.org/publicdomain/zero/1.0/ */
|
|
|
|
// Test the getScreenshot property for mozbrowser
|
|
"use strict";
|
|
|
|
SimpleTest.waitForExplicitFinish();
|
|
browserElementTestHelpers.setEnabledPref(true);
|
|
browserElementTestHelpers.addPermission();
|
|
|
|
function runTest() {
|
|
var iframe1 = document.createElement('iframe');
|
|
SpecialPowers.wrap(iframe1).mozbrowser = true;
|
|
document.body.appendChild(iframe1);
|
|
iframe1.src = 'data:text/html,<html>' +
|
|
'<body style="background:green">hello</body></html>';
|
|
|
|
var screenshotImageDatas = [];
|
|
var numLoaded = 0;
|
|
|
|
function screenshotTaken(screenshotImageData) {
|
|
screenshotImageDatas.push(screenshotImageData);
|
|
if (screenshotImageDatas.length === 1) {
|
|
ok(true, 'Got initial non blank screenshot');
|
|
|
|
var view = screenshotImageData.data;
|
|
if (view[3] !== 255) {
|
|
ok(false, 'The first pixel of initial screenshot is not opaque');
|
|
SimpleTest.finish();
|
|
return;
|
|
}
|
|
ok(true, 'Verified the first pixel of initial screenshot is opaque');
|
|
|
|
iframe1.src = 'data:text/html,<html>' +
|
|
'<body style="background:transparent">hello</body></html>';
|
|
|
|
// Wait until screenshotImageData !== screenshotImageDatas[0].
|
|
waitForScreenshot(function(screenshotImageData) {
|
|
var view1 = screenshotImageData.data;
|
|
var view2 = screenshotImageDatas[0].data;
|
|
|
|
if (view1.length != view2.length) {
|
|
return true;
|
|
}
|
|
|
|
for (var i = 0; i < view1.length; i++) {
|
|
if (view1[i] != view2[i]) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}, 'image/png');
|
|
}
|
|
else if (screenshotImageDatas.length === 2) {
|
|
ok(true, 'Got updated screenshot after source page changed');
|
|
|
|
var view = screenshotImageData.data;
|
|
if (view[3] !== 0) {
|
|
// The case here will always fail when oop'd on Firefox Desktop,
|
|
// but not on B2G Emulator
|
|
// See https://bugzil.la/878003#c20
|
|
|
|
var isB2G = (navigator.platform === '');
|
|
info('navigator.platform: ' + navigator.platform);
|
|
if (!isB2G && browserElementTestHelpers.getOOPByDefaultPref()) {
|
|
todo(false, 'The first pixel of updated screenshot is not transparent');
|
|
} else {
|
|
ok(false, 'The first pixel of updated screenshot is not transparent');
|
|
}
|
|
SimpleTest.finish();
|
|
return;
|
|
}
|
|
|
|
ok(true, 'Verified the first pixel of updated screenshot is transparent');
|
|
SimpleTest.finish();
|
|
}
|
|
}
|
|
|
|
// We continually take screenshots until we get one that we are
|
|
// happy with.
|
|
function waitForScreenshot(filter, mimeType) {
|
|
function gotImage(e) {
|
|
// |this| is the Image.
|
|
|
|
URL.revokeObjectURL(this.src);
|
|
|
|
if (e.type === 'error' || !this.width || !this.height) {
|
|
tryAgain();
|
|
|
|
return;
|
|
}
|
|
|
|
var canvas = document.createElement('canvas');
|
|
canvas.width = canvas.height = 1000;
|
|
var ctx = canvas.getContext('2d');
|
|
ctx.drawImage(this, 0, 0);
|
|
var imageData = ctx.getImageData(0, 0, 1000, 1000);
|
|
|
|
if (filter(imageData)) {
|
|
screenshotTaken(imageData);
|
|
return;
|
|
}
|
|
tryAgain();
|
|
}
|
|
|
|
function tryAgain() {
|
|
if (--attempts === 0) {
|
|
ok(false, 'Timed out waiting for correct screenshot');
|
|
SimpleTest.finish();
|
|
} else {
|
|
setTimeout(function() {
|
|
iframe1.getScreenshot(1000, 1000, mimeType).onsuccess =
|
|
getScreenshotImageData;
|
|
}, 200);
|
|
}
|
|
}
|
|
|
|
function getScreenshotImageData(e) {
|
|
var blob = e.target.result;
|
|
if (blob.type !== mimeType) {
|
|
ok(false, 'MIME type of screenshot taken incorrect');
|
|
SimpleTest.finish();
|
|
}
|
|
|
|
if (blob.size === 0) {
|
|
tryAgain();
|
|
|
|
return;
|
|
}
|
|
|
|
var img = new Image();
|
|
img.src = URL.createObjectURL(blob);
|
|
img.onload = img.onerror = gotImage;
|
|
}
|
|
|
|
var attempts = 10;
|
|
iframe1.getScreenshot(1000, 1000, mimeType).onsuccess =
|
|
getScreenshotImageData;
|
|
}
|
|
|
|
function iframeLoadedHandler() {
|
|
numLoaded++;
|
|
if (numLoaded === 2) {
|
|
waitForScreenshot(function(screenshotImageData) {
|
|
return true;
|
|
}, 'image/jpeg');
|
|
}
|
|
}
|
|
|
|
iframe1.addEventListener('mozbrowserloadend', iframeLoadedHandler);
|
|
}
|
|
|
|
addEventListener('testready', runTest);
|