| <html> |
| <br> <img id="pngBlob"/> |
| |
| <script> |
| if (window.testRunner) { |
| testRunner.waitUntilDone(); |
| } |
| // source content as canvas |
| const htmlCanvas = document.createElement('canvas'); |
| htmlCanvas.width = 60; |
| htmlCanvas.height = 60; |
| const htmlCanvasCtx = htmlCanvas.getContext("2d"); |
| htmlCanvasCtx.fillStyle = "blue"; |
| htmlCanvasCtx.fillRect(0, 0, 15, 60); |
| htmlCanvasCtx.fillStyle = "red"; |
| htmlCanvasCtx.fillRect(15, 0, 45, 30); |
| htmlCanvasCtx.fillStyle = "green"; |
| htmlCanvasCtx.fillRect(15, 30, 45, 30); |
| |
| const canNewOffscreen = new OffscreenCanvas(60,60); |
| const ctxNewOffscreen = canNewOffscreen.getContext("bitmaprenderer"); |
| const canToBlobOffscreen = new OffscreenCanvas(60,60); |
| const ctxToBlobOffscreen = canToBlobOffscreen.getContext("bitmaprenderer"); |
| createImageBitmap(htmlCanvas).then(function(bmap){ |
| // This offscreen canvas will be used in several tests |
| ctxNewOffscreen.transferFromImageBitmap(bmap); |
| |
| // Fill canvasToBlob |
| const pngImage = document.getElementById("pngBlob"); |
| canNewOffscreen.convertToBlob().then(function(blob){ |
| pngImage.src = URL.createObjectURL(blob); |
| pngImage.onload = () => { |
| if (window.testRunner) { |
| testRunner.notifyDone(); |
| } |
| } |
| }) |
| |
| }); |
| |
| </script> |
| </html> |
