components/script_bindings/webidls/OffscreenCanvas.webidl


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/* 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 https://mozilla.org/MPL/2.0/. */

// https://html.spec.whatwg.org/multipage/#the-offscreencanvas-interface
typedef (OffscreenCanvasRenderingContext2D or WebGLRenderingContext or WebGL2RenderingContext)
OffscreenRenderingContext;

dictionary ImageEncodeOptions {
  DOMString type = "image/png";
  unrestricted double quality = 1.0;
};

//enum OffscreenRenderingContextId { "2d", "webgl", "webgl2" };

[Exposed=(Window,Worker)/*, Transferable*/, Pref="dom_offscreen_canvas_enabled"]
interface OffscreenCanvas : EventTarget {
  [Throws] constructor([EnforceRange] unsigned long long width, [EnforceRange] unsigned long long height);
  attribute [EnforceRange] unsigned long long width;
  attribute [EnforceRange] unsigned long long height;

  [Throws] OffscreenRenderingContext? getContext(DOMString contextId, optional any options = null);
  //ImageBitmap transferToImageBitmap();
  //Promise<Blob> convertToBlob(optional ImageEncodeOptions options);
};