| <!DOCTYPE html> |
| <title>Block reading offscreen canvas via StrictCanvasTainting setting</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| if (window.testRunner) |
| testRunner.overridePreference("WebKitDisableReadingFromCanvas", true); |
| |
| var image = new Image(); |
| var offCanvas = new OffscreenCanvas(100, 100); |
| var context = offCanvas.getContext('2d'); |
| |
| test(function () { |
| assert_throws_dom( |
| "SecurityError", |
| function() { |
| var imageData = context.getImageData(0, 0, 100, 100); |
| assert_unreached('getImageData should throw'); |
| }); |
| }, 'getImageData'); |
| |
| test(function () { |
| assert_throws_dom( |
| "SecurityError", |
| function() { |
| context.drawImage(image, 0, 0, 100, 100); |
| var imageData = context.getImageData(0, 0, 100, 100); |
| assert_unreached('getImageData should throw'); |
| }); |
| }, 'getImageData'); |
| |
| </script> |
