dom/canvas/OffscreenCanvasRenderingContext2D.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 sts=2 et cindent: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef MOZILLA_DOM_OFFSCREENCANVASRENDERINGCONTEXT2D_H_
   8 #define MOZILLA_DOM_OFFSCREENCANVASRENDERINGCONTEXT2D_H_
   9
  10 #include "mozilla/RefPtr.h"
  11 #include "mozilla/dom/CanvasRenderingContext2D.h"
  12
  13 struct JSContext;
  14 class nsIGlobalObject;
  15
  16 namespace mozilla::dom {
  17 class OffscreenCanvas;
  18
  19 class OffscreenCanvasRenderingContext2D final
  20     : public CanvasRenderingContext2D {
  21  public:
  22   // nsISupports interface + CC
  23   NS_DECL_ISUPPORTS_INHERITED
  24   NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS_INHERITED(
  25       OffscreenCanvasRenderingContext2D, CanvasRenderingContext2D)
  26
  27   explicit OffscreenCanvasRenderingContext2D(
  28       layers::LayersBackend aCompositorBackend);
  29
  30   nsIGlobalObject* GetParentObject() const;
  31
  32   JSObject* WrapObject(JSContext* aCx,
  33                        JS::Handle<JSObject*> aGivenProto) override;
  34
  35   OffscreenCanvas* Canvas() { return mOffscreenCanvas; }
  36   const OffscreenCanvas* Canvas() const { return mOffscreenCanvas; }
  37
  38   void Commit(ErrorResult& aRv);
  39
  40   NS_IMETHOD InitializeWithDrawTarget(
  41       nsIDocShell* aShell, NotNull<gfx::DrawTarget*> aTarget) override;
  42
  43  private:
  44   void AddZoneWaitingForGC() override;
  45   void AddAssociatedMemory() override;
  46   void RemoveAssociatedMemory() override;
  47
  48   ~OffscreenCanvasRenderingContext2D() override;
  49 };
  50
  51 size_t BindingJSObjectMallocBytes(OffscreenCanvasRenderingContext2D* aContext);
  52
  53 }  // namespace mozilla::dom
  54
  55 #endif  // MOZILLA_DOM_OFFSCREENCANVASRENDERINGCONTEXT2D_H_