| <!DOCTYPE html> |
| <script src="../../resources/js-test.js"></script> |
| <script> |
| jsTestIsAsync = true; |
| var worker = new Worker('./resources/worker-onmessage-noop.js'); |
| |
| description("Tests that the close method of ImageBitmap does dispose the image data"); |
| |
| var imgHeight = 10; |
| var imgWidth = 10; |
| var imageData = new ImageData(10, 10); |
| var bitmap; |
| var ctx; |
| createImageBitmap(imageData).then(imageBitmap => { |
| bitmap = imageBitmap; |
| shouldBe("bitmap.width", "imgWidth"); |
| shouldBe("bitmap.height", "imgHeight"); |
| |
| // Apply structured clone to the bitmap, nothing should be changed |
| worker.postMessage({data: bitmap}); |
| shouldBe("bitmap.width", "imgWidth"); |
| shouldBe("bitmap.height", "imgHeight"); |
| |
| // After calling close, the image data associated with the bitmap should no longer exist |
| bitmap.close(); |
| shouldBe("bitmap.width", "0"); |
| shouldBe("bitmap.height", "0"); |
| |
| var canvas = document.createElement("canvas"); |
| canvas.width = imgWidth; |
| canvas.height = imgHeight; |
| ctx = canvas.getContext("2d"); |
| shouldThrow("ctx.drawImage(bitmap, 0, 0)"); |
| |
| // Try to apply structured clone to an already closed bitmap |
| try { |
| worker.postMessage({data: bitmap}); |
| testFailed("Apply structured clone to an already closed bitmap passed unexpectedly"); |
| } catch(ex) { |
| testPassed("Apply structured clone to an already closed bitmap is rejected as expected: " + ex); |
| } |
| |
| // Try to apply transfering to an already closed bitmap |
| try { |
| worker.postMessage({data: bitmap}, [bitmap]); |
| testFailed("Apply transfering to an already closed bitmap passed unexpectedly"); |
| } catch(ex) { |
| testPassed("Apply transfering to an already closed bitmap is rejected as expected: " + ex); |
| } |
| |
| // Calling createImageBitmap from a closed bitmap should be rejected |
| return createImageBitmap(bitmap).then(function() { |
| testFailed("Promise accepted, expected to be rejected"); |
| finishJSTest(); |
| }, ex => { |
| testPassed("createImageBitmap from a closed ImageBitmap was rejected. " + ex); |
| }); |
| }).then(() => { |
| // Call close to a already closed bitmap should be noop. |
| bitmap.close(); |
| shouldBe("bitmap.width", "0"); |
| shouldBe("bitmap.height", "0"); |
| |
| return createImageBitmap(imageData).then(imageBitmap => { |
| bitmap = imageBitmap; |
| shouldBe("bitmap.width", "imgWidth"); |
| shouldBe("bitmap.height", "imgHeight"); |
| |
| // Transfer the bitmap to a worker |
| worker.postMessage({data: bitmap}, [bitmap]); |
| |
| // After transfering, the bitmap is neutered. |
| shouldBe("bitmap.width", "0"); |
| shouldBe("bitmap.height", "0"); |
| |
| // Calling close to a neutered bitmap should be noop. |
| bitmap.close(); |
| shouldBe("bitmap.width", "0"); |
| shouldBe("bitmap.height", "0"); |
| }); |
| }).catch(function(ex) { |
| testFailed("Unexpected failure: " + ex); |
| }).then(() => { finishJSTest(); }); |
| </script> |
