| <html> |
| <head> |
| <script type="text/javascript"> |
| var kSize = 16; |
| var contextLost = false; |
| |
| function onLoad() { |
| var canvas = createNewCanvas(); |
| var gl = canvas.getContext('webgl'); |
| if (!gl || !clearAndValidate(gl, 1, 0, 0)) |
| window.domAutomationController.send("FAILED"); |
| |
| canvas.addEventListener('webglcontextlost', (event) => { |
| event.preventDefault(); |
| contextLost = true; |
| }); |
| |
| canvas.addEventListener('webglcontextrestored', () => { |
| // Using the original WebGL context after restoring should succeed. |
| if (clearAndValidate(gl, 0, 1, 0)) |
| window.domAutomationController.send("SUCCESS"); |
| else |
| window.domAutomationController.send("FAILED"); |
| }); |
| |
| window.domAutomationController.send("LOADED"); |
| } |
| |
| function createNewCanvas() { |
| var canvas = document.createElement('canvas'); |
| canvas.width = kSize; |
| canvas.height = kSize; |
| document.body.appendChild(canvas); |
| |
| return canvas; |
| } |
| |
| function clearAndValidate(gl, r, g, b) { |
| gl.clearColor(r, g, b, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| var pixels = new Uint8Array(kSize * kSize * 4); |
| gl.readPixels(0, 0, kSize, kSize, gl.RGBA, gl.UNSIGNED_BYTE, pixels); |
| |
| return pixels[0] == r * 255 && pixels[1] == g * 255 && |
| pixels[2] == b * 255 && pixels[3] == 255; |
| } |
| |
| function testNewWebGLContext() { |
| // Reset the success/failure code that onLoad() may have set. |
| window.domAutomationController.reset(); |
| |
| var canvas = createNewCanvas(); |
| var gl = canvas.getContext('webgl'); |
| if (gl != null && clearAndValidate(gl, 0, 0, 1)) |
| window.domAutomationController.send("SUCCESS"); |
| else |
| window.domAutomationController.send("FAILED"); |
| } |
| |
| </script> |
| </head> |
| <body onload="onLoad()"> |
| </body> |
| </html> |
