| <html> |
| <head> |
| <script type="text/javascript"> |
| let canvas; |
| let gl; |
| let msrb; |
| let contextLost = false; |
| |
| function send(str) { |
| if (window.domAutomationController) { |
| window.domAutomationController.send(str); |
| } else { |
| console.log(str); |
| } |
| } |
| |
| function animate() { |
| if (!contextLost) { |
| gl.clearColor(0, 1, 0, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| } |
| requestAnimationFrame(animate); |
| } |
| |
| function onLoad() { |
| canvas = document.getElementById("canvas1"); |
| canvas.addEventListener('webglcontextlost', function(e) { |
| console.log('Context lost'); |
| e.preventDefault(); |
| contextLost = true; |
| }, false); |
| canvas.addEventListener('webglcontextrestored', function(e) { |
| contextLost = false; |
| send("SUCCESS"); |
| }, false); |
| gl = canvas.getContext('webgl2', {powerPreference: "low-power"}); |
| msrb = gl.createRenderbuffer(); |
| gl.bindRenderbuffer(gl.RENDERBUFFER, msrb); |
| gl.renderbufferStorageMultisample(gl.RENDERBUFFER, 2, gl.RGBA8, 16, 16); |
| gl.bindRenderbuffer(gl.RENDERBUFFER, null); |
| let err = gl.getError(); |
| if (err != 0) { |
| console.log("Error " + err + " allocating multisampled renderbuffer"); |
| send("FAILED"); |
| return; |
| } |
| // Must draw to the WebGL canvas in order for the GPU switch to be detected. |
| requestAnimationFrame(animate); |
| send("LOADED"); |
| } |
| |
| function runTest() { |
| let c2 = document.getElementById("canvas2"); |
| let gl = c2.getContext('webgl2', {powerPreference: "high-performance"}); |
| } |
| </script> |
| </head> |
| <body onload="onLoad()"> |
| <canvas id="canvas1" width="16px" height="16px"></canvas> |
| <canvas id="canvas2" width="16px" height="16px"></canvas> |
| </body> |
| </html> |
