The Tor Browser: gfx/layers/composite/CanvasLayerComposite.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_CanvasLayerComposite_H

     7 #define GFX_CanvasLayerComposite_H

     9 #include "Layers.h"                     // for CanvasLayer, etc

    10 #include "mozilla/Attributes.h"         // for MOZ_OVERRIDE

    11 #include "mozilla/RefPtr.h"             // for RefPtr

    12 #include "mozilla/layers/LayerManagerComposite.h"  // for LayerComposite, etc

    13 #include "mozilla/layers/LayersTypes.h"  // for LayerRenderState, etc

    14 #include "nsDebug.h"                    // for NS_RUNTIMEABORT

    15 #include "nsRect.h"                     // for nsIntRect

    16 #include "nscore.h"                     // for nsACString

    17 struct nsIntPoint;

    19 namespace mozilla {

    20 namespace layers {

    22 class CompositableHost;

    23 // Canvas layers use ImageHosts (but CanvasClients) because compositing a

    24 // canvas is identical to compositing an image.

    25 class ImageHost;

    27 class CanvasLayerComposite : public CanvasLayer,

    28                              public LayerComposite

    29 {

    30 public:

    31   CanvasLayerComposite(LayerManagerComposite* aManager);

    33   virtual ~CanvasLayerComposite();

    35   // CanvasLayer impl

    36   virtual void Initialize(const Data& aData) MOZ_OVERRIDE

    37   {

    38     NS_RUNTIMEABORT("Incompatibe surface type");

    39   }

    41   virtual LayerRenderState GetRenderState() MOZ_OVERRIDE;

    43   virtual bool SetCompositableHost(CompositableHost* aHost) MOZ_OVERRIDE;

    45   virtual void Disconnect() MOZ_OVERRIDE

    46   {

    47     Destroy();

    48   }

    50   virtual Layer* GetLayer() MOZ_OVERRIDE;

    51   virtual void RenderLayer(const nsIntRect& aClipRect) MOZ_OVERRIDE;

    53   virtual void CleanupResources() MOZ_OVERRIDE;

    55   CompositableHost* GetCompositableHost() MOZ_OVERRIDE;

    57   virtual LayerComposite* AsLayerComposite() MOZ_OVERRIDE { return this; }

    59   void SetBounds(nsIntRect aBounds) { mBounds = aBounds; }

    61   virtual const char* Name() const MOZ_OVERRIDE { return "CanvasLayerComposite"; }

    63 protected:

    64   virtual nsACString& PrintInfo(nsACString& aTo, const char* aPrefix) MOZ_OVERRIDE;

    66 private:

    67   RefPtr<CompositableHost> mImageHost;

    68 };

    70 } /* layers */

    71 } /* mozilla */

    72 #endif /* GFX_CanvasLayerComposite_H */

The Tor Browser / file revision

gfx/layers/composite/CanvasLayerComposite.h@97036ab72558

gfx/layers/composite/CanvasLayerComposite.h