| <!DOCTYPE html> |
| <title>Block reading offscreen canvas in worker via StrictCanvasTainting setting</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script id='myWorker' type='text/worker'> |
| self.onmessage = function(e) { |
| var offCanvas = new OffscreenCanvas(100, 100); |
| var context = offCanvas.getContext('2d'); |
| |
| var name1; |
| try { |
| var imageData = context.getImageData(0, 0, 100, 100); |
| name1 = "NoError"; |
| } catch (ex) { |
| name1 = ex.name; |
| } |
| |
| var name2; |
| try { |
| var imageCanvas = new OffscreenCanvas(100, 100); |
| var imageCtx = imageCanvas.getContext('2d'); |
| imageCtx.fillStyle = "blue"; |
| imageCtx.fillRect(0, 0, 100, 100); |
| var imageBitMap = imageCanvas.transferToImageBitmap(); |
| |
| context.drawImage(imageBitMap, 0, 0, 100, 100); |
| var imageData = context.getImageData(0, 0, 100, 100); |
| name2 = "NoError"; |
| } catch (ex) { |
| name2 = ex.name; |
| } |
| self.postMessage([name1, name2]); |
| }; |
| </script> |
| <script> |
| if (window.testRunner) { |
| testRunner.overridePreference("WebKitDisableReadingFromCanvas", true); |
| } |
| |
| async_test(function() { |
| var blob = new Blob([document.getElementById('myWorker').textContent]); |
| var worker = new Worker(URL.createObjectURL(blob)); |
| worker.onmessage = this.step_func(function (e) { |
| assert_equals(e.data[0], "SecurityError", "First test on getImageData"); |
| assert_equals(e.data[1], "SecurityError", "Second test on getImageData"); |
| this.done(); |
| }); |
| |
| worker.postMessage(""); |
| }, "getImageData should throw on worker"); |
| |
| |
| </script> |
