| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <link rel="stylesheet" href="resources/webgl_test_files/resources/js-test-style.css"/> |
| <script src="resources/webgl_test_files/js/js-test-pre.js"></script> |
| <script src="resources/webgl_test_files/js/webgl-test-utils.js"></script> |
| </head> |
| <body onload="test()"> |
| <div id="description"></div> |
| <div id="console"></div> |
| <script> |
| "use strict"; |
| description("Test that a context can be lost multiple times."); |
| |
| var wtu = WebGLTestUtils; |
| var gl; |
| |
| async function waitForWebGLContextLostAndRestore(canvas) |
| { |
| return new Promise((resolve, reject) => { |
| const rejectID = setTimeout(reject, 2000); |
| function handleContextLoss(event) { |
| console.log("got here 1"); |
| clearTimeout(rejectID); |
| event.preventDefault(); |
| console.log("got here 2"); |
| |
| resolve(); |
| } |
| canvas.addEventListener("webglcontextlost", handleContextLoss, { once: true }); |
| }); |
| } |
| |
| async function waitForWebGLContextRestored(canvas) |
| { |
| return new Promise((resolve, reject) => { |
| setTimeout(reject, 2000); |
| canvas.addEventListener("webglcontextrestored", resolve, { once: true }); |
| }); |
| } |
| |
| async function runTest() |
| { |
| if (!window.internals) { |
| testFailed("Needs internals."); |
| return; |
| } |
| const canvas = document.createElement("canvas"); |
| canvas.width = 1; |
| canvas.height = 1; |
| gl = wtu.create3DContext(canvas); |
| |
| for (let i = 0; i < 7; ++i) { |
| const webglcontextlostandrestore = waitForWebGLContextLostAndRestore(canvas); |
| const webglcontextrestored = waitForWebGLContextRestored(canvas); |
| |
| internals.simulateEventForWebGLContext("GPUStatusFailure", gl); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| |
| try { |
| await webglcontextlostandrestore; |
| testPassed(`Got webglcontextlost iteration:${i}`); |
| } catch (e) { |
| testFailed(`Timed out waiting webglcontextlost iteration:${i}` + e); |
| return; |
| } |
| shouldBeTrue("gl.isContextLost()"); |
| shouldBe("gl.getError()", "gl.CONTEXT_LOST_WEBGL"); |
| shouldBe("gl.getError()", "gl.NO_ERROR"); |
| try { |
| await webglcontextrestored; |
| testPassed(`Got webglcontextrestored iteration:${i}`); |
| } catch (e) { |
| testFailed(`Timed out waiting webglcontextrestored iteration:${i}`); |
| return; |
| } |
| shouldBeFalse("gl.isContextLost()"); |
| shouldBe("gl.getError()", "gl.NO_ERROR"); |
| } |
| } |
| |
| async function test() |
| { |
| await runTest(); |
| finishTest(); |
| } |
| |
| </script> |
| </body> |
| </html> |
