gecko/gfx/layers/ipc/ShadowLayersParent.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=8 et :
*/
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at:
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Code.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Chris Jones <jones.chris.g@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef mozilla_layers_ShadowLayersParent_h
#define mozilla_layers_ShadowLayersParent_h
#include "mozilla/layers/PLayersParent.h"
namespace mozilla {
namespace layout {
class RenderFrameParent;
}
namespace layers {
class Layer;
class ShadowLayerManager;
class ShadowLayersParent : public PLayersParent
{
typedef mozilla::layout::RenderFrameParent RenderFrameParent;
typedef InfallibleTArray<Edit> EditArray;
typedef InfallibleTArray<EditReply> EditReplyArray;
public:
ShadowLayersParent(ShadowLayerManager* aManager);
~ShadowLayersParent();
void Destroy();
ShadowLayerManager* layer_manager() const { return mLayerManager; }
ContainerLayer* GetRoot() const { return mRoot; }
protected:
NS_OVERRIDE virtual bool RecvUpdate(const EditArray& cset,
EditReplyArray* reply);
NS_OVERRIDE virtual bool RecvGetParentType(LayersBackend* aBackend);
NS_OVERRIDE virtual PLayerParent* AllocPLayer();
NS_OVERRIDE virtual bool DeallocPLayer(PLayerParent* actor);
private:
RenderFrameParent* Frame();
nsRefPtr<ShadowLayerManager> mLayerManager;
// Hold the root because it might be grafted under various
// containers in the "real" layer tree
nsRefPtr<ContainerLayer> mRoot;
// When the widget/frame/browser stuff in this process begins its
// destruction process, we need to Disconnect() all the currently
// live shadow layers, because some of them might be orphaned from
// the layer tree. This happens in Destroy() above. After we
// Destroy() ourself, there's a window in which that information
// hasn't yet propagated back to the child side and it might still
// send us layer transactions. We want to ignore those transactions
// because they refer to "zombie layers" on this side. So, we track
// that state with |mDestroyed|. This is similar to, but separate
// from, |mLayerManager->IsDestroyed()|; we might have had Destroy()
// called on us but the mLayerManager might not be destroyed, or
// vice versa. In both cases though, we want to ignore shadow-layer
// transactions posted by the child.
bool mDestroyed;
};
} // namespace layers
} // namespace mozilla
#endif // ifndef mozilla_layers_ShadowLayersParent_h