The Tor Browser: gfx/layers/ipc/ShadowLayerUtilsX11.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: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-

     2  * vim: sw=2 ts=8 et :

     3  */

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

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

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

     8 #ifndef mozilla_layers_ShadowLayerUtilsX11_h

     9 #define mozilla_layers_ShadowLayerUtilsX11_h

    11 #include "ipc/IPCMessageUtils.h"

    12 #include "mozilla/GfxMessageUtils.h"

    13 #include "nsCOMPtr.h"                   // for already_AddRefed

    15 #define MOZ_HAVE_SURFACEDESCRIPTORX11

    16 #define MOZ_HAVE_PLATFORM_SPECIFIC_LAYER_BUFFERS

    18 typedef unsigned long XID;

    19 typedef XID Drawable;

    21 class gfxXlibSurface;

    23 namespace IPC {

    24 class Message;

    25 }

    27 namespace mozilla {

    28 namespace layers {

    30 struct SurfaceDescriptorX11 {

    31   SurfaceDescriptorX11()

    32   { }

    34   SurfaceDescriptorX11(gfxXlibSurface* aSurf);

    36   SurfaceDescriptorX11(Drawable aDrawable, XID aFormatID,

    37                        const gfx::IntSize& aSize);

    39   // Default copy ctor and operator= are OK

    41   bool operator==(const SurfaceDescriptorX11& aOther) const {

    42     // Define == as two descriptors having the same XID for now,

    43     // ignoring size and render format.  If the two indeed refer to

    44     // the same valid XID, then size/format are "actually" the same

    45     // anyway, regardless of the values of the fields in

    46     // SurfaceDescriptorX11.

    47     return mId == aOther.mId;

    48   }

    50   already_AddRefed<gfxXlibSurface> OpenForeign() const;

    52   Drawable mId;

    53   XID mFormat; // either a PictFormat or VisualID

    54   gfx::IntSize mSize;

    55 };

    57 } // namespace layers

    58 } // namespace mozilla

    60 namespace IPC {

    62 template <>

    63 struct ParamTraits<mozilla::layers::SurfaceDescriptorX11> {

    64   typedef mozilla::layers::SurfaceDescriptorX11 paramType;

    66   static void Write(Message* aMsg, const paramType& aParam) {

    67     WriteParam(aMsg, aParam.mId);

    68     WriteParam(aMsg, aParam.mSize);

    69     WriteParam(aMsg, aParam.mFormat);

    70   }

    72   static bool Read(const Message* aMsg, void** aIter, paramType* aResult) {

    73     return (ReadParam(aMsg, aIter, &aResult->mId) &&

    74             ReadParam(aMsg, aIter, &aResult->mSize) &&

    75             ReadParam(aMsg, aIter, &aResult->mFormat));

    76   }

    77 };

    79 } // namespace IPC

    81 #endif  // mozilla_layers_ShadowLayerUtilsX11_h

The Tor Browser / file revision

gfx/layers/ipc/ShadowLayerUtilsX11.h@97036ab72558

gfx/layers/ipc/ShadowLayerUtilsX11.h