| <!doctype HTML> |
| <html> |
| <head> |
| <title>HTML5 Canvas Test: globalCompositeOperation "destination-over"</title> |
| <link rel="match" href="canvas_compositing_globalcompositeoperation_001-ref.htm"> |
| <link rel="author" title="Microsoft" href="http://www.microsoft.com" /> |
| <link rel="help" href="http://www.w3.org/TR/2dcontext/#dom-context-2d-globalcompositeoperation" /> |
| <meta name="assert" content="If the globalCompositeOperation is set to 'destination-over', display the destination image wherever the destination image is opaque." /> |
| <script type="text/javascript"> |
| function runTest() |
| { |
| var canvas = document.getElementById("canvas1"); |
| var ctx = canvas.getContext("2d"); |
| |
| // Source image. |
| ctx.fillStyle = "rgba(0, 0, 0, 1.0)"; |
| ctx.fillRect(0, 0, 100, 50); |
| |
| // Assign the globalCompositeOperation. |
| ctx.globalCompositeOperation = "destination-over"; |
| |
| // Destination image. |
| ctx.fillStyle = "rgba(255, 0, 0, 1.0)"; |
| ctx.fillRect(0, 0, 100, 50); |
| } |
| </script> |
| </head> |
| <body onload="runTest()"> |
| <p>Description: If the globalCompositeOperation is set to "destination-over", display the destination image wherever the destination image is opaque.</p> |
| <canvas id="canvas1" width="300" height="150">Browser does not support HTML5 Canvas.</canvas> |
| </body> |
| </html> |
