| <!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 WEBGL_lose_context functions do not crash after context has been lost."); |
| |
| var wtu = WebGLTestUtils; |
| var gl; |
| |
| async function waitForWebGLContextLost(canvas) |
| { |
| return new Promise((resolve, reject) => { |
| setTimeout(reject, 2000); |
| canvas.addEventListener("webglcontextlost", resolve, { once: true }); |
| }); |
| } |
| |
| function testDescription(subcase) { |
| return Object.keys(subcase).map((k) => `${k}: ${typeof subcase[k] === "function" ? subcase[k].name : subcase[k]}`).join(", "); |
| } |
| |
| async function runTest(subcase) |
| { |
| debug(`Running test: ${testDescription(subcase)}`); |
| const canvas = document.createElement("canvas"); |
| canvas.width = 1; |
| canvas.height = 1; |
| gl = wtu.create3DContext(canvas); |
| const WEBGL_lose_context = wtu.getExtensionWithKnownPrefixes(gl, "WEBGL_lose_context"); |
| if (!WEBGL_lose_context) { |
| debug("Could not find WEBGL_lose_context extension"); |
| return false; |
| } |
| |
| const webglcontextlost = waitForWebGLContextLost(canvas); |
| |
| if (subcase.loseMethod == "loseContext") |
| WEBGL_lose_context.loseContext(); |
| else if (subcase.loseMethod == "gpuStatusFailure") { |
| internals.simulateEventForWebGLContext("GPUStatusFailure", gl); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| } else if (subcase.loseMethod == "manyContexts") { |
| // This causes the older contexts to be lost, including the first one we created |
| // for testing. |
| for (let i = 0; i < 50; ++i) |
| document.createElement("canvas").getContext("webgl"); |
| } |
| |
| try { |
| await webglcontextlost; |
| testPassed("Got webglcontextlost."); |
| } catch (e) { |
| testFailed("Timed out waiting webglcontextlost."); |
| } |
| shouldBeTrue("gl.isContextLost()"); |
| shouldBe("gl.getError()", "gl.CONTEXT_LOST_WEBGL"); |
| shouldBe("gl.getError()", "gl.NO_ERROR"); |
| |
| if (subcase.testedMethod == "loseContext") |
| WEBGL_lose_context.loseContext(); |
| else if (subcase.testedMethod == "restoreContext") |
| WEBGL_lose_context.restoreContext(); |
| testPassed(`Did not crash on tested method ${subcase.testedMethod}.`); |
| } |
| |
| const loseMethods = ["loseContext", "manyContexts"]; |
| if (window.internals) |
| loseMethods.push("gpuStatusFailure"); |
| const testedMethods = ["loseContext", "restoreContext"]; |
| |
| const subcases = []; |
| for (const loseMethod of loseMethods) |
| for (const testedMethod of testedMethods) |
| subcases.push({loseMethod, testedMethod}); |
| |
| async function test() |
| { |
| for (let subcase of subcases) |
| await runTest(subcase); |
| finishTest(); |
| } |
| </script> |
| </body> |
| </html> |
