зеркало из https://github.com/mozilla/gecko-dev.git
80 строки
2.4 KiB
C++
80 строки
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_LAYERS_TEXTUREFORWARDER
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#define MOZILLA_LAYERS_TEXTUREFORWARDER
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#include <stdint.h> // for int32_t, uint64_t
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#include "gfxTypes.h"
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#include "mozilla/layers/LayersTypes.h" // for LayersBackend
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#include "mozilla/layers/TextureClient.h" // for TextureClient
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#include "mozilla/layers/KnowsCompositor.h"
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namespace mozilla {
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namespace ipc {
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class IShmemAllocator;
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}
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namespace layers {
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/**
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* An abstract interface for classes that implement the autogenerated
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* IPDL actor class. Lets us check if they are still valid for IPC.
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*/
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class LayersIPCActor {
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public:
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virtual bool IPCOpen() const { return true; }
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};
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/**
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* An abstract interface for LayersIPCActors that implement a top-level
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* IPDL protocol so also have their own channel.
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* Has their own MessageLoop for message dispatch, and can allocate
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* shmem.
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*/
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class LayersIPCChannel : public LayersIPCActor
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, public mozilla::ipc::IShmemAllocator {
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public:
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NS_IMETHOD_(MozExternalRefCountType) AddRef(void) = 0;
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NS_IMETHOD_(MozExternalRefCountType) Release(void) = 0;
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virtual bool IsSameProcess() const = 0;
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virtual bool UsesImageBridge() const { return false; }
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virtual base::ProcessId GetParentPid() const = 0;
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virtual MessageLoop* GetMessageLoop() const = 0;
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virtual FixedSizeSmallShmemSectionAllocator* GetTileLockAllocator() { return nullptr; }
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virtual void CancelWaitForRecycle(uint64_t aTextureId) = 0;
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protected:
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virtual ~LayersIPCChannel() {}
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};
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/**
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* An abstract interface for classes that can allocate PTexture objects
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* across IPDL. Currently a sub-class of LayersIPCChannel for simplicity
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* since all our implementations use both, but could be independant if needed.
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*/
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class TextureForwarder : public LayersIPCChannel {
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public:
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/**
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* Create a TextureChild/Parent pair as as well as the TextureHost on the parent side.
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*/
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virtual PTextureChild* CreateTexture(
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const SurfaceDescriptor& aSharedData,
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LayersBackend aLayersBackend,
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TextureFlags aFlags,
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uint64_t aSerial) = 0;
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};
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} // namespace layers
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} // namespace mozilla
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#endif
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