The Tor Browser: gfx/2d/SourceSurfaceCairo.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_OP_SOURCESURFACE_CAIRO_H

     7 #define _MOZILLA_GFX_OP_SOURCESURFACE_CAIRO_H

     9 #include "2D.h"

    11 namespace mozilla {

    12 namespace gfx {

    14 class DrawTargetCairo;

    16 class SourceSurfaceCairo : public SourceSurface

    17 {

    18 public:

    19   MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(SourceSurfaceCairo)

    20   // Create a SourceSurfaceCairo. The surface will not be copied, but simply

    21   // referenced.

    22   // If aDrawTarget is non-nullptr, it is assumed that this is a snapshot source

    23   // surface, and we'll call DrawTargetCairo::RemoveSnapshot(this) on it when

    24   // we're destroyed.

    25   SourceSurfaceCairo(cairo_surface_t* aSurface, const IntSize& aSize,

    26                      const SurfaceFormat& aFormat,

    27                      DrawTargetCairo* aDrawTarget = nullptr);

    28   virtual ~SourceSurfaceCairo();

    30   virtual SurfaceType GetType() const { return SurfaceType::CAIRO; }

    31   virtual IntSize GetSize() const;

    32   virtual SurfaceFormat GetFormat() const;

    33   virtual TemporaryRef<DataSourceSurface> GetDataSurface();

    35   cairo_surface_t* GetSurface() const;

    37 private: // methods

    38   friend class DrawTargetCairo;

    39   void DrawTargetWillChange();

    41 private: // data

    42   IntSize mSize;

    43   SurfaceFormat mFormat;

    44   cairo_surface_t* mSurface;

    45   DrawTargetCairo* mDrawTarget;

    46 };

    48 class DataSourceSurfaceCairo : public DataSourceSurface

    49 {

    50 public:

    51   MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DataSourceSurfaceCairo)

    52   DataSourceSurfaceCairo(cairo_surface_t* imageSurf);

    53   virtual ~DataSourceSurfaceCairo();

    54   virtual unsigned char *GetData();

    55   virtual int32_t Stride();

    57   virtual SurfaceType GetType() const { return SurfaceType::CAIRO_IMAGE; }

    58   virtual IntSize GetSize() const;

    59   virtual SurfaceFormat GetFormat() const;

    61   cairo_surface_t* GetSurface() const;

    63 private:

    64   cairo_surface_t* mImageSurface;

    65 };

    67 }

    68 }

    70 #endif // _MOZILLA_GFX_OP_SOURCESURFACE_CAIRO_H

The Tor Browser / file revision

gfx/2d/SourceSurfaceCairo.h@97036ab72558

gfx/2d/SourceSurfaceCairo.h