| <!DOCTYPE html> |
| <html> |
| <body> |
| <canvas id ="canvas" width="540" height="550"></canvas> |
| <script> |
| var canvas = document.getElementById('canvas'); |
| // In the test page, the paint worklet canvas has a size of width of 270 CSS |
| // pixels, and height of 275. To divided by 2 is to match the canvas size. |
| canvas.style.width = (canvas.width / 2) + 'px'; |
| canvas.style.height = (canvas.height / 2) + 'px'; |
| var ctx = canvas.getContext("2d"); |
| var fillW = 250; |
| var fillH = 50; |
| ctx.setTransform(2 * devicePixelRatio, 0, 0, 2 * devicePixelRatio, 0, 200); |
| ctx.beginPath(); |
| ctx.rect(0, 0, fillW, fillH); |
| ctx.closePath(); |
| ctx.clip(); |
| ctx.fillStyle = 'green'; |
| ctx.fillRect(0, 0, fillW, fillH); |
| </script> |
| </body> |
| </html> |
