| <html> |
| <head> |
| <script src="../../js/resources/js-test-pre.js"></script> |
| <script src="resources/webgl-test.js"></script> |
| <script src="resources/webgl-test-utils.js"></script> |
| <script> |
| var wtu = WebGLTestUtils; |
| var canvas; |
| var gl; |
| var shouldGenerateGLError; |
| var extension_name = "WEBKIT_lose_context"; |
| var extension; |
| var bufferObjects; |
| var program; |
| var texture; |
| var texColor = [255, 10, 20, 255]; |
| var allowRestore; |
| |
| function init() |
| { |
| if (window.initNonKhronosFramework) { |
| window.initNonKhronosFramework(true); |
| } |
| |
| description("Tests behavior under a restored context."); |
| |
| shouldGenerateGLError = wtu.shouldGenerateGLError; |
| runTests(); |
| } |
| |
| function runTests() |
| { |
| testLosingContext(); |
| testLosingAndRestoringContext(); |
| |
| finish(); |
| } |
| |
| function setupTest() |
| { |
| canvas = document.createElement("canvas"); |
| canvas.width = 1; |
| canvas.height = 1; |
| gl = wtu.create3DContext(canvas); |
| extension = gl.getExtension(extension_name); |
| if (!extension) { |
| debug(extension_name + " extension not found."); |
| return false; |
| } |
| return true; |
| } |
| |
| function testLosingContext() |
| { |
| if (!setupTest()) |
| return; |
| |
| debug("Test losing a context and inability to restore it."); |
| |
| canvas.addEventListener("webglcontextlost", testLostContext); |
| canvas.addEventListener("webglcontextrestored", testShouldNotRestoreContext); |
| allowRestore = false; |
| |
| testOriginalContext(); |
| extension.loseContext(); |
| shouldGenerateGLError(gl, gl.INVALID_OPERATION, "extension.restoreContext()"); |
| debug(""); |
| } |
| |
| function testLosingAndRestoringContext() |
| { |
| if (!setupTest()) |
| return; |
| |
| debug("Test losing and restoring a context."); |
| |
| canvas.addEventListener("webglcontextlost", testLostContext); |
| canvas.addEventListener("webglcontextrestored", testRestoredContext); |
| allowRestore = true; |
| |
| testOriginalContext(); |
| extension.loseContext(); |
| shouldGenerateGLError(gl, gl.NO_ERROR, "extension.restoreContext()"); |
| debug(""); |
| } |
| |
| function testRendering() |
| { |
| gl.clearColor(0, 0, 0, 255); |
| gl.colorMask(1, 1, 1, 0); |
| gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT); |
| |
| program = wtu.setupSimpleTextureProgram(gl); |
| bufferObjects = wtu.setupUnitQuad(gl); |
| texture = wtu.createColoredTexture(gl, canvas.width, canvas.height, texColor); |
| |
| gl.uniform1i(gl.getUniformLocation(program, "tex"), 0); |
| wtu.drawQuad(gl, [0, 0, 0, 255]); |
| |
| var compare = texColor.slice(0, 3); |
| wtu.checkCanvasRect(gl, 0, 0, canvas.width, canvas.height, compare, "shouldBe " + compare); |
| |
| shouldBe("gl.getError()", "gl.NO_ERROR"); |
| } |
| |
| function testOriginalContext() |
| { |
| debug("Test valid context"); |
| shouldBeFalse("gl.isContextLost()"); |
| shouldBe("gl.getError()", "gl.NO_ERROR"); |
| testRendering(); |
| debug(""); |
| } |
| |
| function testLostContext(e) |
| { |
| debug("Test lost context"); |
| shouldBeTrue("gl.isContextLost()"); |
| shouldBe("gl.getError()", "gl.CONTEXT_LOST_WEBGL"); |
| shouldBe("gl.getError()", "gl.NO_ERROR"); |
| debug(""); |
| if (allowRestore) |
| e.preventDefault(); |
| } |
| |
| function testShouldNotRestoreContext(e) |
| { |
| testFailed("Should not restore the context unless preventDefault is called on the context lost event"); |
| debug(""); |
| } |
| |
| function testResources(expected) |
| { |
| var tests = [ |
| "gl.bindTexture(gl.TEXTURE_2D, texture)", |
| "gl.useProgram(program)", |
| "gl.bindBuffer(gl.ARRAY_BUFFER, bufferObjects[0])", |
| ]; |
| |
| for (var i = 0; i < tests.length; ++i) |
| shouldGenerateGLError(gl, expected, tests[i]); |
| } |
| |
| function testRestoredContext() |
| { |
| debug("Test restored context"); |
| shouldBeFalse("gl.isContextLost()"); |
| shouldBe("gl.getError()", "gl.NO_ERROR"); |
| |
| // Validate that using old resources fails. |
| testResources(gl.INVALID_OPERATION); |
| |
| testRendering(); |
| |
| // Validate new resources created in testRendering(). |
| testResources(gl.NO_ERROR); |
| debug(""); |
| } |
| |
| function finish() { |
| successfullyParsed = true; |
| var epilogue = document.createElement("script"); |
| epilogue.onload = function() { |
| if (window.nonKhronosFrameworkNotifyDone) |
| window.nonKhronosFrameworkNotifyDone(); |
| }; |
| epilogue.src = "../../js/resources/js-test-post.js"; |
| document.body.appendChild(epilogue); |
| } |
| |
| </script> |
| </head> |
| <body onload="init()"> |
| <div id="description"></div> |
| <div id="console"></div> |
| </body> |
| </html> |
