gfx/layers/OOPCanvasRenderer.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   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_LAYERS_OOPCANVASRENDERER_H_
   8 #define MOZILLA_LAYERS_OOPCANVASRENDERER_H_
   9
  10 #include "nsISupportsImpl.h"
  11
  12 class nsICanvasRenderingContextInternal;
  13
  14 namespace mozilla {
  15
  16 namespace dom {
  17 class HTMLCanvasElement;
  18 }
  19
  20 namespace layers {
  21 class CanvasClient;
  22
  23 /**
  24  * This renderer works with WebGL running in the host process.  It does
  25  * not perform any graphics operations itself -- it is the client-side
  26  * representation.  It forwards WebGL composition to the remote process.
  27  */
  28 class OOPCanvasRenderer final {
  29   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(OOPCanvasRenderer)
  30
  31  public:
  32   explicit OOPCanvasRenderer(nsICanvasRenderingContextInternal* aContext)
  33       : mContext(aContext) {}
  34
  35   dom::HTMLCanvasElement* mHTMLCanvasElement = nullptr;
  36
  37   // The ClientWebGLContext that this is for
  38   nsICanvasRenderingContextInternal* mContext = nullptr;
  39
  40   // The lifetime of this pointer is controlled by OffscreenCanvas
  41   // Can be accessed in active thread and ImageBridge thread.
  42   // But we never accessed it at the same time on both thread. So no
  43   // need to protect this member.
  44   CanvasClient* mCanvasClient = nullptr;
  45
  46  private:
  47   ~OOPCanvasRenderer() = default;
  48 };
  49
  50 }  // namespace layers
  51 }  // namespace mozilla
  52
  53 #endif  // MOZILLA_LAYERS_OOPCANVASRENDERER_H_