The Tor Browser: gfx/layers/ipc/ShadowLayerParent.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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 #include "ShadowLayerParent.h"

     9 #include "Layers.h"                     // for Layer, ContainerLayer

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

    11 #include "nsISupportsImpl.h"            // for Layer::AddRef, etc

    13 #include "mozilla/layers/ThebesLayerComposite.h"

    14 #include "mozilla/layers/CanvasLayerComposite.h"

    15 #include "mozilla/layers/ColorLayerComposite.h"

    16 #include "mozilla/layers/ImageLayerComposite.h"

    17 #include "mozilla/layers/ContainerLayerComposite.h"

    19 namespace mozilla {

    20 namespace layers {

    22 ShadowLayerParent::ShadowLayerParent() : mLayer(nullptr)

    23 {

    24 }

    26 ShadowLayerParent::~ShadowLayerParent()

    27 {

    28 }

    30 void

    31 ShadowLayerParent::Bind(Layer* layer)

    32 {

    33   mLayer = layer;

    34 }

    36 void

    37 ShadowLayerParent::Destroy()

    38 {

    39   // It's possible for Destroy() to come in just after this has been

    40   // created, but just before the transaction in which Bind() would

    41   // have been called.  In that case, we'll ignore shadow-layers

    42   // transactions from there on and never get a layer here.

    43   if (mLayer) {

    44     mLayer->Disconnect();

    45   }

    46 }

    48 ContainerLayerComposite*

    49 ShadowLayerParent::AsContainerLayerComposite() const

    50 {

    51   return mLayer && mLayer->GetType() == Layer::TYPE_CONTAINER

    52          ? static_cast<ContainerLayerComposite*>(mLayer.get())

    53          : nullptr;

    54 }

    56 CanvasLayerComposite*

    57 ShadowLayerParent::AsCanvasLayerComposite() const

    58 {

    59   return mLayer && mLayer->GetType() == Layer::TYPE_CANVAS

    60          ? static_cast<CanvasLayerComposite*>(mLayer.get())

    61          : nullptr;

    62 }

    64 ColorLayerComposite*

    65 ShadowLayerParent::AsColorLayerComposite() const

    66 {

    67   return mLayer && mLayer->GetType() == Layer::TYPE_COLOR

    68          ? static_cast<ColorLayerComposite*>(mLayer.get())

    69          : nullptr;

    70 }

    72 ImageLayerComposite*

    73 ShadowLayerParent::AsImageLayerComposite() const

    74 {

    75   return mLayer && mLayer->GetType() == Layer::TYPE_IMAGE

    76          ? static_cast<ImageLayerComposite*>(mLayer.get())

    77          : nullptr;

    78 }

    80 RefLayerComposite*

    81 ShadowLayerParent::AsRefLayerComposite() const

    82 {

    83   return mLayer && mLayer->GetType() == Layer::TYPE_REF

    84          ? static_cast<RefLayerComposite*>(mLayer.get())

    85          : nullptr;

    86 }

    88 ThebesLayerComposite*

    89 ShadowLayerParent::AsThebesLayerComposite() const

    90 {

    91   return mLayer && mLayer->GetType() == Layer::TYPE_THEBES

    92          ? static_cast<ThebesLayerComposite*>(mLayer.get())

    93          : nullptr;

    94 }

    96 void

    97 ShadowLayerParent::ActorDestroy(ActorDestroyReason why)

    98 {

    99   switch (why) {

   100   case AncestorDeletion:

   101     NS_RUNTIMEABORT("shadow layer deleted out of order!");

   102     return;                     // unreached

   104   case Deletion:

   105     // See comment near Destroy() above.

   106     if (mLayer) {

   107       mLayer->Disconnect();

   108     }

   109     break;

   111   case AbnormalShutdown:

   112     if (mLayer) {

   113       mLayer->Disconnect();

   114     }

   115     break;

   117   case NormalShutdown:

   118     // let IPDL-generated code automatically clean up Shmems and so

   119     // forth; our channel is disconnected anyway

   120     break;

   122   case FailedConstructor:

   123     NS_RUNTIMEABORT("FailedConstructor isn't possible in PLayerTransaction");

   124     return;                     // unreached

   125   }

   127   mLayer = nullptr;

   128 }

   130 } // namespace layers

   131 } // namespace mozilla

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