| <!DOCTYPE html> |
| <html> |
| <head> |
| <script src="../../http/tests/inspector/resources/inspector-test.js"></script> |
| <script> |
| function load() { |
| window.context = document.body.appendChild(document.createElement("canvas")).getContext("2d"); |
| |
| runTest(); |
| } |
| |
| function changeSize(width, height) { |
| window.context.canvas.width = width; |
| window.context.canvas.height = height; |
| |
| // Force the creation of the image buffer, which is used to determine memory cost. |
| window.context.canvas.toDataURL(); |
| } |
| |
| function test() { |
| let suite = InspectorTest.createAsyncSuite("Canvas.memory"); |
| |
| suite.addTestCase({ |
| name: "Canvas.memory.memoryCost", |
| description: "Check that memory cost is sent with the canvas when able.", |
| test(resolve, reject) { |
| // NOTE: the memory cost of a canvas will not be retrievable until an operation is |
| // performed on that canvas that requires the image buffer. A blank canvas that was |
| // just created will not have a buffer, so its memory cost will be 0/NaN. |
| |
| let canvases = Array.from(WI.canvasManager.canvasCollection).filter((canvas) => canvas.contextType === WI.Canvas.ContextType.Canvas2D); |
| if (!canvases.length) { |
| reject("Missing 2D canvas."); |
| return; |
| } |
| |
| InspectorTest.assert(canvases.length === 1, "There should only be one canvas-2d."); |
| |
| InspectorTest.log(`Memory cost of canvas is ${canvases[0].memoryCost}.`); |
| resolve(); |
| } |
| }); |
| |
| suite.addTestCase({ |
| name: "Canvas.memory.canvasMemoryChanged", |
| description: "Check that memory cost is updated when the backend value changes.", |
| test(resolve, reject) { |
| let canvases = Array.from(WI.canvasManager.canvasCollection).filter((canvas) => canvas.contextType === WI.Canvas.ContextType.Canvas2D); |
| if (!canvases.length) { |
| reject("Missing 2D canvas."); |
| return; |
| } |
| |
| InspectorTest.assert(canvases.length === 1, "There should only be one canvas-2d."); |
| |
| let initialMemoryCost = canvases[0].memoryCost; |
| canvases[0].awaitEvent(WI.Canvas.Event.MemoryChanged) |
| .then((event) => { |
| InspectorTest.expectGreaterThan(event.target.memoryCost, isNaN(initialMemoryCost) ? 0 : initialMemoryCost, "Memory cost should increase upon initially resizing canvas."); |
| }) |
| .then(resolve, reject); |
| |
| const width = 200; |
| const height = 200; |
| InspectorTest.log(`Change size of canvas to ${width}x${height}.`); |
| InspectorTest.evaluateInPage(`changeSize(${width}, ${height})`); |
| } |
| }); |
| |
| suite.runTestCasesAndFinish(); |
| } |
| </script> |
| </head> |
| <body onload="load()"> |
| <p>Test that CanvasManager tracks canvas memory costs and is notified of changes.</p> |
| </body> |
| </html> |
