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 GFX_VR_LAYERCHILD_H
8 #define GFX_VR_LAYERCHILD_H
9 
10 #include "VRManagerChild.h"
11 
12 #include "mozilla/RefPtr.h"
13 #include "mozilla/gfx/PVRLayerChild.h"
14 #include "gfxVR.h"
15 
16 class nsICanvasRenderingContextInternal;
17 
18 namespace mozilla {
19 class WebGLContext;
20 class WebGLFramebufferJS;
21 namespace dom {
22 class HTMLCanvasElement;
23 }
24 namespace layers {
25 class SharedSurfaceTextureClient;
26 }
27 namespace gl {
28 class SurfaceFactory;
29 }
30 namespace gfx {
31 
32 class VRLayerChild : public PVRLayerChild {
33   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(VRLayerChild)
34 
35  public:
36   static PVRLayerChild* CreateIPDLActor();
37   static bool DestroyIPDLActor(PVRLayerChild* actor);
38 
39   void Initialize(dom::HTMLCanvasElement* aCanvasElement,
40                   const gfx::Rect& aLeftEyeRect,
41                   const gfx::Rect& aRightEyeRect);
42   void SetXRFramebuffer(WebGLFramebufferJS*);
43   void SubmitFrame(const VRDisplayInfo& aDisplayInfo);
44   bool IsIPCOpen();
45 
46  private:
47   VRLayerChild();
48   virtual ~VRLayerChild();
49   void ClearSurfaces();
50   virtual void ActorDestroy(ActorDestroyReason aWhy) override;
51 
52   RefPtr<dom::HTMLCanvasElement> mCanvasElement;
53   bool mIPCOpen = false;
54 
55   // AddIPDLReference and ReleaseIPDLReference are only to be called by
56   // CreateIPDLActor and DestroyIPDLActor, respectively. We intentionally make
57   // them private to prevent misuse. The purpose of these methods is to be aware
58   // of when the IPC system around this actor goes down: mIPCOpen is then set to
59   // false.
60   void AddIPDLReference();
61   void ReleaseIPDLReference();
62 
63   gfx::Rect mLeftEyeRect;
64   gfx::Rect mRightEyeRect;
65   RefPtr<WebGLFramebufferJS> mFramebuffer;
66 
67   Maybe<layers::SurfaceDescriptor> mThisFrameTextureDesc;
68   Maybe<layers::SurfaceDescriptor> mLastFrameTextureDesc;
69 
70   uint64_t mLastSubmittedFrameId = 0;
71 };
72 
73 }  // namespace gfx
74 }  // namespace mozilla
75 
76 #endif
77