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|---|
| (Empty) | |
| 1 <!DOCTYPE html> |
| 2 <html> |
| 3 <body> |
| 4 <canvas id='output' width='200' height='400'></canvas> |
| 5 <script id='myWorker' type='text/worker'> |
| 6 self.onmessage = function(e) { |
| 7 var aCanvas = new OffscreenCanvas(200, 400); |
| 8 var ctx = aCanvas.getContext('2d'); |
| 9 |
| 10 ctx.beginPath(); |
| 11 ctx.lineWidth = '10'; |
| 12 ctx.strokeStyle = 'green'; |
| 13 ctx.lineJoin = 'round'; |
| 14 ctx.moveTo(15, 15); |
| 15 ctx.lineTo(135, 15); |
| 16 ctx.lineTo(70, 170); |
| 17 ctx.closePath(); |
| 18 ctx.stroke(); |
| 19 |
| 20 var path1 = new Path2D(); |
| 21 path1.moveTo(150, 25); |
| 22 path1.bezierCurveTo(10, 150, 10, 300, 100, 200); |
| 23 ctx.strokeStyle = 'purple'; |
| 24 ctx.setLineDash([ 10, 5 ]); |
| 25 ctx.stroke(path1); |
| 26 |
| 27 ctx.fillStyle = 'red'; |
| 28 ctx.beginPath() |
| 29 ctx.arc(75, 325, 50, 0, Math.PI * 2, true); |
| 30 ctx.arc(75, 325, 20, 0, Math.PI * 2, true); |
| 31 ctx.fill("evenodd"); |
| 32 |
| 33 var image = aCanvas.transferToImageBitmap(); |
| 34 self.postMessage(image, [image]); |
| 35 }; |
| 36 </script> |
| 37 <script> |
| 38 if (window.testRunner) { |
| 39 testRunner.waitUntilDone(); |
| 40 } |
| 41 var blob = new Blob([document.getElementById('myWorker').textContent]); |
| 42 var worker = new Worker(URL.createObjectURL(blob)); |
| 43 worker.addEventListener('message', msg => { |
| 44 var outputCtx = document.getElementById('output').getContext('imagebitmap'); |
| 45 outputCtx.transferImageBitmap(msg.data); |
| 46 if (window.testRunner) { |
| 47 testRunner.notifyDone(); |
| 48 } |
| 49 }); |
| 50 worker.postMessage(""); |
| 51 </script> |
| 52 </body> |
| 53 </html> |
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Chromium Code Reviews
Issue 1806943005:
Implemented/Tested line-drawing functions in OffscreenCanvas 2D Context (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master