gfx/ipc/CanvasManagerChild.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 #ifndef _include_gfx_ipc_CanvasManagerChild_h__
   7 #define _include_gfx_ipc_CanvasManagerChild_h__
   8
   9 #include "mozilla/Atomics.h"
  10 #include "mozilla/gfx/PCanvasManagerChild.h"
  11 #include "mozilla/gfx/Types.h"
  12 #include "mozilla/ThreadLocal.h"
  13
  14 namespace mozilla {
  15 namespace dom {
  16 class CanvasRenderingContext2D;
  17 class ThreadSafeWorkerRef;
  18 class WorkerPrivate;
  19 }  // namespace dom
  20
  21 namespace layers {
  22 class CanvasChild;
  23 class ActiveResourceTracker;
  24 }  // namespace layers
  25
  26 namespace webgpu {
  27 class WebGPUChild;
  28 }  // namespace webgpu
  29
  30 namespace gfx {
  31 class DataSourceSurface;
  32
  33 class CanvasManagerChild final : public PCanvasManagerChild {
  34  public:
  35   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CanvasManagerChild, override);
  36
  37   explicit CanvasManagerChild(dom::ThreadSafeWorkerRef* aWorkerRef,
  38                               uint32_t aId);
  39   uint32_t Id() const { return mId; }
  40   already_AddRefed<DataSourceSurface> GetSnapshot(
  41       uint32_t aManagerId, int32_t aProtocolId,
  42       const Maybe<RemoteTextureOwnerId>& aOwnerId, SurfaceFormat aFormat,
  43       bool aPremultiply, bool aYFlip);
  44   void ActorDestroy(ActorDestroyReason aReason) override;
  45
  46   static CanvasManagerChild* Get();
  47   static CanvasManagerChild* MaybeGet();
  48   static void Shutdown();
  49   static bool CreateParent(
  50       mozilla::ipc::Endpoint<PCanvasManagerParent>&& aEndpoint);
  51
  52   bool IsCanvasActive() { return mActive; }
  53   void EndCanvasTransaction();
  54   void ClearCachedResources();
  55   void DeactivateCanvas();
  56   void BlockCanvas();
  57
  58   RefPtr<layers::CanvasChild> GetCanvasChild();
  59
  60   RefPtr<webgpu::WebGPUChild> GetWebGPUChild();
  61
  62   layers::ActiveResourceTracker* GetActiveResourceTracker();
  63
  64  private:
  65   ~CanvasManagerChild();
  66   void DestroyInternal();
  67   void Destroy();
  68
  69   RefPtr<mozilla::dom::ThreadSafeWorkerRef> mWorkerRef;
  70   RefPtr<layers::CanvasChild> mCanvasChild;
  71   RefPtr<webgpu::WebGPUChild> mWebGPUChild;
  72   UniquePtr<layers::ActiveResourceTracker> mActiveResourceTracker;
  73   const uint32_t mId;
  74   bool mActive = true;
  75   bool mBlocked = false;
  76
  77   static MOZ_THREAD_LOCAL(CanvasManagerChild*) sLocalManager;
  78   static Atomic<uint32_t> sNextId;
  79 };
  80
  81 }  // namespace gfx
  82 }  // namespace mozilla
  83
  84 #endif  // _include_gfx_ipc_CanvasManagerChild_h__