| <!DOCTYPE html> |
| <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. --> |
| <html class="reftest-wait"> |
| <link rel="match" href="2d.layer.render-opportunities.getImageData-expected.html"> |
| <title>Canvas test: 2d.layer.render-opportunities.getImageData</title> |
| <h1>2d.layer.render-opportunities.getImageData</h1> |
| <p class="desc">Check that layers state stack is flushed and rebuilt on frame renders.</p> |
| <canvas id="canvas" width="200" height="200"> |
| <p class="fallback">FAIL (fallback content)</p> |
| </canvas> |
| <script id='myWorker' type='text/worker'> |
| self.onmessage = function(e) { |
| const canvas = new OffscreenCanvas(200, 200); |
| const ctx = canvas.getContext('2d'); |
| |
| ctx.fillStyle = 'purple'; |
| ctx.fillRect(60, 60, 75, 50); |
| ctx.globalAlpha = 0.5; |
| |
| ctx.beginLayer({filter: 'dropShadow', dx: -2, dy: 2}); |
| ctx.fillRect(40, 40, 75, 50); |
| ctx.fillStyle = 'grey'; |
| ctx.fillRect(50, 50, 75, 50); |
| |
| // Force a flush and restoration of the state stack: |
| ctx.getImageData(0, 0, 200, 200); |
| |
| ctx.fillRect(70, 70, 75, 50); |
| ctx.fillStyle = 'orange'; |
| ctx.fillRect(80, 80, 75, 50); |
| ctx.endLayer(); |
| |
| ctx.fillRect(80, 40, 75, 50); |
| |
| const bitmap = canvas.transferToImageBitmap(); |
| self.postMessage(bitmap, bitmap); |
| }; |
| </script> |
| <script> |
| const blob = new Blob([document.getElementById('myWorker').textContent]); |
| const worker = new Worker(URL.createObjectURL(blob)); |
| worker.addEventListener('message', msg => { |
| const outputCtx = document.getElementById("canvas").getContext('2d'); |
| outputCtx.drawImage(msg.data, 0, 0); |
| document.documentElement.classList.remove("reftest-wait"); |
| }); |
| worker.postMessage(null); |
| </script> |
| </html> |
