| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // https://html.spec.whatwg.org/#the-canvas-element |
| |
| typedef (CanvasRenderingContext2D or |
| WebGLRenderingContext or |
| WebGL2RenderingContext or |
| ImageBitmapRenderingContext) RenderingContext; |
| |
| [ |
| ImplementedAs=HTMLCanvasElementModule |
| ] partial interface HTMLCanvasElement |
| { |
| // The PermissiveDictionaryConversion extended attribute is needed to allow the |
| // autogenerated code to match the behavior of the custom binding. Web IDL |
| // requires throwing TypeError if the incoming argument is not an object type |
| // (and is not undefined or null). The binding must ignore this. |
| // Related spec issue: https://github.com/whatwg/html/issues/595 |
| [RaisesException] RenderingContext? getContext(DOMString contextId, [PermissiveDictionaryConversion] optional CanvasContextCreationAttributes attributes); |
| [RuntimeEnabled=ExperimentalCanvasFeatures, RaisesException, MeasureAs=OffscreenCanvas] OffscreenCanvas transferControlToOffscreen(); |
| }; |