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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MOZILLA_LAYERS_TEXTUREFORWARDER
#define MOZILLA_LAYERS_TEXTUREFORWARDER
#include <stdint.h> // for int32_t, uint64_t
#include "gfxTypes.h"
#include "mozilla/layers/LayersTypes.h" // for LayersBackend
#include "mozilla/layers/TextureClient.h" // for TextureClient
#include "mozilla/layers/KnowsCompositor.h"
namespace mozilla {
namespace ipc {
class IShmemAllocator;
}
namespace layers {
/**
* An abstract interface for classes that implement the autogenerated
* IPDL actor class. Lets us check if they are still valid for IPC.
*/
class LayersIPCActor {
public:
virtual bool IPCOpen() const { return true; }
};
/**
* An abstract interface for LayersIPCActors that implement a top-level
* IPDL protocol so also have their own channel.
* Has their own MessageLoop for message dispatch, and can allocate
* shmem.
*/
class LayersIPCChannel : public LayersIPCActor
, public mozilla::ipc::IShmemAllocator {
public:
NS_IMETHOD_(MozExternalRefCountType) AddRef(void) = 0;
NS_IMETHOD_(MozExternalRefCountType) Release(void) = 0;
virtual bool IsSameProcess() const = 0;
virtual bool UsesImageBridge() const { return false; }
virtual base::ProcessId GetParentPid() const = 0;
virtual MessageLoop* GetMessageLoop() const = 0;
virtual FixedSizeSmallShmemSectionAllocator* GetTileLockAllocator() { return nullptr; }
virtual void CancelWaitForRecycle(uint64_t aTextureId) = 0;
protected:
virtual ~LayersIPCChannel() {}
};
/**
* An abstract interface for classes that can allocate PTexture objects
* across IPDL. Currently a sub-class of LayersIPCChannel for simplicity
* since all our implementations use both, but could be independant if needed.
*/
class TextureForwarder : public LayersIPCChannel {
public:
/**
* Create a TextureChild/Parent pair as as well as the TextureHost on the parent side.
*/
virtual PTextureChild* CreateTexture(
const SurfaceDescriptor& aSharedData,
LayersBackend aLayersBackend,
TextureFlags aFlags,
uint64_t aSerial) = 0;
};
} // namespace layers
} // namespace mozilla
#endif
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