The Tor Browser: gfx/layers/D3D9SurfaceImage.h@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-

     2  * This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef GFX_D3DSURFACEIMAGE_H

     7 #define GFX_D3DSURFACEIMAGE_H

     9 #include "mozilla/RefPtr.h"

    10 #include "ImageContainer.h"

    11 #include "nsAutoPtr.h"

    12 #include "d3d9.h"

    14 namespace mozilla {

    15 namespace layers {

    17 // Image class that wraps a IDirect3DSurface9. This class copies the image

    18 // passed into SetData(), so that it can be accessed from other D3D devices.

    19 // This class also manages the synchronization of the copy, to ensure the

    20 // resource is ready to use.

    21 class D3D9SurfaceImage : public Image

    22                        , public ISharedImage {

    23 public:

    25   struct Data {

    26     Data(IDirect3DSurface9* aSurface, const nsIntRect& aRegion)

    27       : mSurface(aSurface), mRegion(aRegion) {}

    28     RefPtr<IDirect3DSurface9> mSurface;

    29     nsIntRect mRegion;

    30   };

    32   D3D9SurfaceImage();

    33   virtual ~D3D9SurfaceImage();

    35   virtual ISharedImage* AsSharedImage() MOZ_OVERRIDE { return this; }

    37   // Copies the surface into a sharable texture's surface, and initializes

    38   // the image.

    39   HRESULT SetData(const Data& aData);

    41   // Returns the description of the shared surface.

    42   const D3DSURFACE_DESC& GetDesc() const;

    44   // Returns the HANDLE that can be used to open the image as a shared resource.

    45   // If the operation to copy the original resource to the shared resource

    46   // hasn't finished yet, this function blocks until the synchronization is

    47   // complete.

    48   HANDLE GetShareHandle();

    50   gfx::IntSize GetSize() MOZ_OVERRIDE;

    52   virtual TemporaryRef<gfx::SourceSurface> GetAsSourceSurface() MOZ_OVERRIDE;

    54   virtual TextureClient* GetTextureClient(CompositableClient* aClient) MOZ_OVERRIDE;

    55   virtual uint8_t* GetBuffer() MOZ_OVERRIDE { return nullptr; }

    57 private:

    59   // Blocks the calling thread until the copy operation started in SetData()

    60   // is complete, whereupon the texture is safe to use.

    61   void EnsureSynchronized();

    63   gfx::IntSize mSize;

    64   RefPtr<IDirect3DTexture9> mTexture;

    65   RefPtr<IDirect3DQuery9> mQuery;

    66   RefPtr<TextureClient> mTextureClient;

    67   HANDLE mShareHandle;

    68   D3DSURFACE_DESC mDesc;

    69 };

    71 } // namepace layers

    72 } // namespace mozilla

    74 #endif // GFX_D3DSURFACEIMAGE_H

The Tor Browser / file revision

gfx/layers/D3D9SurfaceImage.h@97036ab72558

gfx/layers/D3D9SurfaceImage.h