| <!DOCTYPE html> |
| <html> |
| <style> |
| html, body { margin: 0; padding: 0; } |
| canvas {width: 150px; height: 150px; } |
| </style> |
| <body> |
| <p>This test ensures that the PaintWorkletGlobalScope.devicePixelRatio returns |
| the correct value, which should be identical as window.devicePixelRatio. To |
| manually test, open both this file and "device-pixel-ratio-ref.html" with a |
| browser, and you should see two idential green rectangles.</p> |
| <canvas id ="canvas" width="100" height="100"></canvas> |
| <script> |
| var canvas = document.getElementById('canvas'); |
| canvas.width = 150 * window.devicePixelRatio; |
| canvas.height = 150 * window.devicePixelRatio; |
| var context = canvas.getContext("2d"); |
| context.fillStyle = 'green'; |
| var draw_width = Math.floor(canvas.width / window.devicePixelRatio); |
| var draw_height = Math.floor(canvas.height / window.devicePixelRatio); |
| context.fillRect(0, 0, draw_width, draw_height); |
| </script> |
| </body> |
| </html> |
