1 files changed, 45 insertions, 0 deletions
diff --git a/dom/webidl/OffscreenCanvas.webidl b/dom/webidl/OffscreenCanvas.webidl
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+++ b/dom/webidl/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://html.spec.whatwg.org/#the-offscreencanvas-interface
+ */
+
+typedef (OffscreenCanvasRenderingContext2D or ImageBitmapRenderingContext or WebGLRenderingContext or WebGL2RenderingContext or GPUCanvasContext) OffscreenRenderingContext;
+
+dictionary ImageEncodeOptions {
+  DOMString type = "image/png";
+  unrestricted double quality;
+};
+
+enum OffscreenRenderingContextId { "2d", "bitmaprenderer", "webgl", "webgl2", "webgpu" };
+
+[Exposed=(Window,Worker), Pref="gfx.offscreencanvas.enabled"]
+interface OffscreenCanvas : EventTarget {
+  [Throws]
+  constructor([EnforceRange] unsigned long width, [EnforceRange] unsigned long height);
+
+  [Pure, SetterThrows]
+  attribute [EnforceRange] unsigned long width;
+  [Pure, SetterThrows]
+  attribute [EnforceRange] unsigned long height;
+
+  [Throws]
+  OffscreenRenderingContext? getContext(OffscreenRenderingContextId contextId,
+                                        optional any contextOptions = null);
+
+  [Throws]
+  ImageBitmap transferToImageBitmap();
+  [NewObject]
+  Promise<Blob> convertToBlob(optional ImageEncodeOptions options = {});
+
+  attribute EventHandler oncontextlost;
+  attribute EventHandler oncontextrestored;
+
+  // Deprecated by convertToBlob
+  [Deprecated="OffscreenCanvasToBlob", NewObject]
+  Promise<Blob> toBlob(optional DOMString type = "",
+                       optional any encoderOptions);
+};