86 lines
2.8 KiB
C++
86 lines
2.8 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_GFX_FenceD3D11_H
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#define MOZILLA_GFX_FenceD3D11_H
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#include <unordered_map>
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#include "mozilla/gfx/FileHandleWrapper.h"
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#include "mozilla/layers/Fence.h"
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struct ID3D11Device;
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struct ID3D11Fence;
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namespace mozilla {
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namespace layers {
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//
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// A class for wrapping ID3D11Fence.
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//
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// The class can be used for singaling fence and waiting fence. When the class
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// is created by Create(), it can be used for singaling fence and waiting
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// fence. When the class is created by CreateFromHandle() it can be used only
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// for waiting fence.
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//
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// There is a case that ID3D12Fence is used for fence signaling. In this case,
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// the class can be used for waitng fence by using CreateFromHandle().
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//
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// IncrementAndSignal() is used for signaling fence. The fence will be updated
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// after all previous work has completed.
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//
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// For waiting fence, Update() is used to update the target value of the
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// waiting. Wait() is then used to wait for the fence.
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//
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class FenceD3D11 final : public Fence {
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public:
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static RefPtr<FenceD3D11> Create(ID3D11Device* aDevice);
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static RefPtr<FenceD3D11> CreateFromHandle(
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RefPtr<gfx::FileHandleWrapper> aHandle);
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FenceD3D11* AsFenceD3D11() override { return this; }
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// Check if ID3D11Device suppors ID3D11Fence creation.
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static bool IsSupported(ID3D11Device* aDevice);
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RefPtr<FenceD3D11> CloneFromHandle();
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// Updates mSignalFence to incremented value after all previous work has
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// completed. Used only when FenceD3D11 is created by FenceD3D11::Create().
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bool IncrementAndSignal();
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// Update FenceValue to the specified value.
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// Used only when FenceD3D11 is created by FenceD3D11::CreateFromHandle().
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void Update(uint64_t aFenceValue);
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// Wait for fence until it reaches or exceeds mFenceValue.
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bool Wait(ID3D11Device* aDevice);
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uint64_t GetFenceValue() const { return mFenceValue; }
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const RefPtr<gfx::FileHandleWrapper> mHandle;
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protected:
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explicit FenceD3D11(RefPtr<gfx::FileHandleWrapper>& aHandle);
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virtual ~FenceD3D11();
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// Device that is used for creating mSignalFence.
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RefPtr<ID3D11Device> mDevice;
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// Fence that is used for updating fence value.
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// Valid only when created with FenceD3D11::Create().
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RefPtr<ID3D11Fence> mSignalFence;
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uint64_t mFenceValue = 0;
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// Fences that are used for waiting.
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// They are opened for each D3D11 device that the fence is waited on.
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// XXX change to LRU cache
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std::unordered_map<const ID3D11Device*, RefPtr<ID3D11Fence>> mWaitFenceMap;
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};
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} // namespace layers
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} // namespace mozilla
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#endif // MOZILLA_GFX_FenceD3D11_H
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