The Tor Browser: gfx/2d/SourceSurfaceDual.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 MOZILLA_GFX_SOURCESURFACEDUAL_H_

     7 #define MOZILLA_GFX_SOURCESURFACEDUAL_H_

     9 #include "2D.h"

    11 namespace mozilla {

    12 namespace gfx {

    14 class DualSurface;

    15 class DualPattern;

    17 class SourceSurfaceDual : public SourceSurface

    18 {

    19 public:

    20   MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(SourceSurfaceDual)

    21   SourceSurfaceDual(DrawTarget *aDTA, DrawTarget *aDTB)

    22     : mA(aDTA->Snapshot())

    23     , mB(aDTB->Snapshot())

    24   { }

    26   virtual SurfaceType GetType() const { return SurfaceType::DUAL_DT; }

    27   virtual IntSize GetSize() const { return mA->GetSize(); }

    28   virtual SurfaceFormat GetFormat() const { return mA->GetFormat(); }

    30   /* Readback from this surface type is not supported! */

    31   virtual TemporaryRef<DataSourceSurface> GetDataSurface() { return nullptr; }

    32 private:

    33   friend class DualSurface;

    34   friend class DualPattern;

    36   RefPtr<SourceSurface> mA;

    37   RefPtr<SourceSurface> mB;

    38 };

    40 }

    41 }

    43 #endif /* MOZILLA_GFX_SOURCESURFACEDUAL_H_ */

The Tor Browser / file revision

gfx/2d/SourceSurfaceDual.h@97036ab72558

gfx/2d/SourceSurfaceDual.h