Index: third_party/WebKit/LayoutTests/fast/canvas/webgl/offscreenCanvas-context-lost-restored.html |
diff --git a/third_party/WebKit/LayoutTests/fast/canvas/webgl/offscreenCanvas-context-lost-restored.html b/third_party/WebKit/LayoutTests/fast/canvas/webgl/offscreenCanvas-context-lost-restored.html |
new file mode 100644 |
index 0000000000000000000000000000000000000000..bfb22a003c1f866af8d5a0ea6054b3a6dff02f36 |
--- /dev/null |
+++ b/third_party/WebKit/LayoutTests/fast/canvas/webgl/offscreenCanvas-context-lost-restored.html |
@@ -0,0 +1,120 @@ |
+<!DOCTYPE html> |
+<html> |
+<head> |
+<script src="../../../resources/testharness.js"></script> |
+<script src="../../../resources/testharnessreport.js"></script> |
+<script src="./resources/webgl-test-utils-full.js"></script> |
+</head> |
+ |
+<body> |
+<script> |
+var wtu = WebGLTestUtils; |
+var canvas; |
+var gl; |
+var WEBGL_lose_context; |
+var allowRestore; |
+var contextLostEventFired; |
+var contextRestoredEventFired; |
+ |
+function setupTest() |
+{ |
+ canvas = new OffscreenCanvas(10, 10); |
+ gl = canvas.getContext('webgl'); |
+ WEBGL_lose_context = getExtensionAndAddProperty(gl, "WEBGL_lose_context"); |
+ if (!WEBGL_lose_context) { |
+ return false; |
+ } |
+ |
+ return true; |
+} |
+ |
+function getExtensionAndAddProperty(gl, name) { |
+ var ext = wtu.getExtensionWithKnownPrefixes(gl, name); |
+ if (ext) { |
+ ext.webglTestProperty = true; |
+ } |
+ return ext; |
+} |
+ |
+function testOriginalContext() |
+{ |
+ assert_false(gl.isContextLost()); |
+ assert_equals(gl.getError(), gl.NO_ERROR); |
+} |
+ |
+function testLostContext(e) |
+{ |
+ assert_false(contextLostEventFired); |
+ contextLostEventFired = true; |
+ assert_true(gl.isContextLost()); |
+ assert_equals(gl.getError(), gl.NO_ERROR); |
+ if (allowRestore) |
+ e.preventDefault(); |
+} |
+ |
+function testShouldNotRestoreContext(e) |
+{ |
+ assert_true(false, "Should not restore the context unless preventDefault is called on the context lost event"); |
+} |
+ |
+function compareGLError(glError, evalStr) { |
+ var exception; |
+ try { |
+ eval(evalStr); |
+ } catch(e) { |
+ exception = e; |
+ } |
+ if (exception) { |
+ assert_true(false, evalStr + " threw exception " + exception); |
+ } else { |
+ assert_equals(gl.getError(), glError); |
+ } |
+} |
+ |
+function testRestoredContext() |
+{ |
+ assert_false(contextRestoredEventFired); |
+ contextRestoredEventFired = true; |
+// assert_false(gl.isContextLost()); |
xidachen
2016/11/14 19:56:38
Ken, this test fails here if I un-comment this lin
|
+ assert_equals(gl.getError(), gl.NO_ERROR); |
+} |
+ |
+async_test(function(t) { |
+ if (!setupTest()) |
+ assert_true(false, "Cannot initialize test"); |
+ testOriginalContext(); |
+ |
+ canvas.addEventListener("webglcontextrestored", testShouldNotRestoreContext); |
+ canvas.addEventListener("webglcontextlost", function(e) { |
+ testLostContext(e); |
+ // restore the context after this event has exited. |
+ setTimeout(t.step_func(function() { |
+ // we didn't call prevent default so we should not be able to restore the context |
+ compareGLError(gl.INVALID_OPERATION, "WEBGL_lose_context.restoreContext()"); |
+ assert_true(gl.isContextLost()); |
+ assert_equals(gl.getError(), gl.NO_ERROR); |
+ // gl methods should still be no-ops |
+ compareGLError(gl.NO_ERROR, "gl.blendFunc(gl.TEXTURE_2D, gl.TEXTURE_CUBE_MAP)"); |
+ setTimeout(t.step_func_done(function() { |
+ testRestoredContext(); |
+ }, 0)); |
+ }, 0)); |
+ }); |
+ allowRestore = false; |
+ contextLostEventFired = false; |
+ contextRestoredEventFired = false; |
+ |
+ WEBGL_lose_context.loseContext(); |
+ // The context should be lost immediately. |
+ assert_true(gl.isContextLost()); |
+ assert_equals(gl.getError(), gl.CONTEXT_LOST_WEBGL); |
+ assert_equals(gl.getError(), gl.NO_ERROR); |
+ // gl methods should be no-ops |
+ compareGLError(gl.NO_ERROR, "gl.blendFunc(gl.TEXTURE_2D, gl.TEXTURE_CUBE_MAP)"); |
+ // but the event should not have been fired. |
+ assert_false(contextLostEventFired); |
+}, 'Test behavior under a restored context with OffscreenCanvas'); |
+ |
+</script> |
+</body> |
+</html> |