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Unified Diff: third_party/WebKit/LayoutTests/fast/canvas/webgl/offscreenCanvas-context-lost-restored.html

Issue 2490443002: Make OffscreenCanvas an EventTarget (Closed)
Patch Set: pass API layout tests Created 4 years, 1 month ago
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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..fecba800e3522b4977b36c6db832ff48e26acfa4
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/fast/canvas/webgl/offscreenCanvas-context-lost-restored.html
@@ -0,0 +1,217 @@
+<!DOCTYPE html>
+<html>
+<head>
+<script src="../../../resources/testharness.js"></script>
+<script src="../../../resources/testharnessreport.js"></script>
+<script src="./resources/webgl-test.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 new_WEBGL_lose_context;
+var allowRestore;
+var contextLostEventFired;
+var contextRestoredEventFired;
+var OES_vertex_array_object;
+var old_OES_vertex_array_object;
+var OES_texture_float;
+var newExtension;
+
+async_test(function(t) {
+ if (!setupTest()) {
+ assert_true(false, 'Cannot initialize test');
+ t.done();
+ }
+
+ canvas.addEventListener("webglcontextlost", t.step_func(function(e) {
+ testLostContext(e);
+ // restore the context after this event has exited.
+ setTimeout(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()");
+ testLosingAndRestoringContext(t);
+ }, 0);
+ }));
+ canvas.addEventListener("webglcontextrestored", testShouldNotRestoreContext);
+ allowRestore = false;
+ contextLostEventFired = false;
+ contextRestoredEventFired = false;
+
+ testOriginalContext();
+ 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 WebGL context restoration with OffscreenCanvas');
+
+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 setupTest()
+{
+ canvas = new OffscreenCanvas(10, 10);
+ gl = canvas.getContext('webgl');
+ WEBGL_lose_context = getExtensionAndAddProperty(gl, "WEBGL_lose_context");
+ if (!WEBGL_lose_context)
+ return false;
+
+ // Try to get a few extensions
+ OES_vertex_array_object = getExtensionAndAddProperty(gl, "OES_vertex_array_object");
+ OES_texture_float = getExtensionAndAddProperty(gl, "OES_texture_float");
+
+ return true;
+}
+
+function getExtensionAndAddProperty(gl, name) {
+ var ext = wtu.getExtensionWithKnownPrefixes(gl, name);
+ if (ext) {
+ ext.webglTestProperty = true;
+ }
+ return ext;
+}
+
+function reGetExtensionAndTestForProperty(gl, name, expectProperty) {
+ newExtension = wtu.getExtensionWithKnownPrefixes(gl, name);
+ // NOTE: while getting a extension after context lost/restored is allowed to fail
+ // for the purpose the conformance tests it is not.
+ //
+ // Hypothetically the user can switch GPUs live. For example on Windows, install 2 GPUs,
+ // then in the control panen enable 1, disable the others and visa versa. Since the GPUs
+ // have different capabilities one or the other may not support a particlar extension.
+ //
+ // But, for the purpose of the conformance tests the context is expected to restore
+ // on the same GPU and therefore the extensions that succeeded previously should
+ // succeed on restore.
+ assert_true(newExtension != null);
+ if (expectProperty) {
+ assert_true(newExtension.webglTestProperty === true);
+ } else {
+ assert_true(newExtension.webglTestProperty === undefined);
+ }
+ return newExtension;
+}
+
+function testLosingAndRestoringContext(t)
+{
+ if (!setupTest()) {
+ assert_true(false, 'Cannot initialize test');
+ t.done();
+ }
+
+ canvas.addEventListener("webglcontextlost", function(e) {
+ testLostContext(e);
+ // restore the context after this event has exited.
+ setTimeout(function() {
+ compareGLError(gl.NO_ERROR, "WEBGL_lose_context.restoreContext()");
+ // The context should still be lost. It will not get restored until the
+ // webglrestorecontext event is fired.
+ 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)");
+ }, 0);
+ });
+ canvas.addEventListener("webglcontextrestored", t.step_func_done(function() {
+ testRestoredContext();
+ }));
+ allowRestore = true;
+ contextLostEventFired = false;
+ contextRestoredEventFired = false;
+
+ testOriginalContext();
+ 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);
+}
+
+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 testOESTextureFloat() {
+ if (OES_texture_float) {
+ // Extension must still be lost.
+ var tex = gl.createTexture();
+ gl.bindTexture(gl.TEXTURE_2D, tex);
+ compareGLError(gl.INVALID_ENUM, "gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.FLOAT, null)");
+ // Try re-enabling extension
+ OES_texture_float = reGetExtensionAndTestForProperty(gl, "OES_texture_float", false);
+ compareGLError(gl, gl.NO_ERROR, "gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.FLOAT, null)");
+ }
+}
+
+function testOESVertexArrayObject() {
+ if (OES_vertex_array_object) {
+ // Extension must still be lost.
+ assert_equals(OES_vertex_array_object.createVertexArrayOES(), null);
+ // Try re-enabling extension
+
+ old_OES_vertex_array_object = OES_vertex_array_object;
+ OES_vertex_array_object = reGetExtensionAndTestForProperty(gl, "OES_vertex_array_object", false);
+ assert_true(OES_vertex_array_object.createVertexArrayOES() != null);
+ assert_true(old_OES_vertex_array_object.createVertexArrayOES() == null);
+ }
+}
+
+function testExtensions() {
+ testOESTextureFloat();
+ testOESVertexArrayObject();
+ // Only the WEBGL_lose_context extension should be the same object after context lost.
+ new_WEBGL_lose_context = reGetExtensionAndTestForProperty(gl, "WEBGL_lose_context", true);
+}
+
+function testRestoredContext()
+{
+ assert_false(contextRestoredEventFired);
+ contextRestoredEventFired = true;
+ assert_false(gl.isContextLost());
+ assert_equals(gl.getError(), gl.NO_ERROR);
+ testExtensions();
+}
+</script>
+</body>
+</html>
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