Vendor things

third-party/vendor/web-sys/webidls/enabled/OffscreenCanvas.webidl

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+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * For more information on this interface, please see
+ * https://wiki.whatwg.org/wiki/OffscreenCanvas
+ */
+
+dictionary ImageEncodeOptions {
+  DOMString type = "image/png";
+  unrestricted double quality;
+};
+
+[Constructor(unsigned long width, unsigned long height),
+ Exposed=(Window,Worker),
+ Func="mozilla::dom::DOMPrefs::OffscreenCanvasEnabled"]
+interface OffscreenCanvas : EventTarget {
+  [Pure, SetterThrows]
+  attribute unsigned long width;
+  [Pure, SetterThrows]
+  attribute unsigned long height;
+
+  [Throws]
+  nsISupports? getContext(DOMString contextId,
+                          optional any contextOptions = null);
+
+  [Throws]
+  ImageBitmap transferToImageBitmap();
+  [Throws]
+  Promise<Blob> convertToBlob(optional ImageEncodeOptions options = {});
+};
+
+// OffscreenCanvas includes Transferable;