| <!DOCTYPE html> |
| <html> |
| <body> |
| <canvas id='output1' width='100' height='100' style='background:red'></canvas> |
| <canvas id='output2' width='100' height='100' style='background:red'></canvas> |
| <canvas id='output3' width='100' height='100' style='background:red'></canvas> |
| <script id='myWorker' type='text/worker'> |
| self.onmessage = function(e) { |
| var aCanvas = new OffscreenCanvas(100, 100); |
| var ctx = aCanvas.getContext('2d'); |
| ctx.fillStyle = 'green'; |
| ctx.fillRect(0, 0, 100, 100); |
| var image1 = aCanvas.transferToImageBitmap(); |
| |
| ctx.fillStyle = '#D359FE'; |
| ctx.fillRect(0, 0, 100, 100); |
| var image2 = aCanvas.transferToImageBitmap(); |
| |
| ctx.fillStyle = 'rgb(150,250,100)'; |
| ctx.fillRect(0, 0, 100, 100); |
| var image3 = aCanvas.transferToImageBitmap(); |
| |
| self.postMessage( |
| { i1: image1, |
| i2: image2, |
| i3: image3 }, |
| [ image1, image2, image3 ]); |
| }; |
| </script> |
| |
| <script> |
| if (window.testRunner) { |
| testRunner.waitUntilDone(); |
| } |
| var blob = new Blob([document.getElementById('myWorker').textContent]); |
| var worker = new Worker(URL.createObjectURL(blob)); |
| worker.addEventListener('message', msg => { |
| var outputCtx1 = document.getElementById('output1').getContext('bitmaprenderer'); |
| outputCtx1.transferFromImageBitmap(msg.data.i1); |
| var outputCtx2 = document.getElementById('output2').getContext('bitmaprenderer'); |
| outputCtx2.transferFromImageBitmap(msg.data.i2); |
| var outputCtx3 = document.getElementById('output3').getContext('bitmaprenderer'); |
| outputCtx3.transferFromImageBitmap(msg.data.i3); |
| |
| if (window.testRunner) { |
| testRunner.notifyDone(); |
| } |
| }); |
| worker.postMessage(""); |
| </script> |
| </body> |
| </html> |
