author Boris Zbarsky <>
Tue, 15 Nov 2016 00:18:32 -0500
changeset 367550 40f2ef965fde52a2fd626f8a42c74aa1cd5b254d
parent 363704 552ad078563f102d1479b9769ab37547ad94e714
child 370838 32b1721d1125934824d8b4a32904d445047dcb0a
permissions -rw-r--r--
Bug 1316661 part 1. Eliminate IsCallerChrome callers in HTMLCanvasElement code. r=smaug

/* -*- 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
 * The origin of this IDL file is
 * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and
 * Opera Software ASA. You are granted a license to use, reproduce
 * and create derivative works of this document.

interface nsISupports;
interface Variant;

interface HTMLCanvasElement : HTMLElement {
  [Pure, SetterThrows]
           attribute unsigned long width;
  [Pure, SetterThrows]
           attribute unsigned long height;

  nsISupports? getContext(DOMString contextId, optional any contextOptions = null);

  [Throws, NeedsCallerType]
  DOMString toDataURL(optional DOMString type = "",
                      optional any encoderOptions);
  [Throws, NeedsCallerType]
  void toBlob(BlobCallback _callback,
              optional DOMString type = "",
              optional any encoderOptions);

// Mozilla specific bits
partial interface HTMLCanvasElement {
  [Pure, SetterThrows]
           attribute boolean mozOpaque;
  [Throws, NeedsCallerType]
  File mozGetAsFile(DOMString name, optional DOMString? type = null);
  // A Mozilla-only extension to get a canvas context backed by double-buffered
  // shared memory. Only privileged callers can call this.
  [ChromeOnly, Throws]
  nsISupports? MozGetIPCContext(DOMString contextId);

           attribute PrintCallback? mozPrintCallback;

  [Throws, UnsafeInPrerendering, Pref="canvas.capturestream.enabled"]
  CanvasCaptureMediaStream captureStream(optional double frameRate);

// For OffscreenCanvas
// Reference:
partial interface HTMLCanvasElement {
  [Pref="gfx.offscreencanvas.enabled", Throws]
  OffscreenCanvas transferControlToOffscreen();

interface MozCanvasPrintState
  // A canvas rendering context.
  readonly attribute nsISupports context;

  // To be called when rendering to the context is done.
  void done();

callback PrintCallback = void(MozCanvasPrintState ctx);

callback BlobCallback = void(Blob blob);