mirror of
https://github.com/gnif/LookingGlass.git
synced 2026-08-09 00:31:31 +00:00
89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
/**
|
|
* Looking Glass
|
|
* Copyright © 2017-2026 The Looking Glass Authors
|
|
* https://looking-glass.io
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc., 59
|
|
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <Windows.h>
|
|
#include <wdf.h>
|
|
#include <IddCx.h>
|
|
|
|
#include <atomic>
|
|
#include <memory>
|
|
#include <mutex>
|
|
#include "CIndirectDeviceContext.h"
|
|
#include "CSwapChainProcessor.h"
|
|
|
|
using namespace Microsoft::WRL;
|
|
|
|
class CIndirectMonitorContext
|
|
{
|
|
private:
|
|
IDDCX_MONITOR m_monitor;
|
|
|
|
// Guards the swap chain and device pointers. Assign and unassign can run
|
|
// concurrently (an unassign triggered by the worker's WdfObjectDelete can
|
|
// race the next assign), and shared_ptr copy/reset is not thread safe.
|
|
SRWLOCK m_lock = SRWLOCK_INIT;
|
|
|
|
// IddCx can issue a replacement assignment before an earlier assignment
|
|
// has finished creating its devices. Serialize those expensive setup paths
|
|
// while still allowing UnassignSwapChain to cancel the active one.
|
|
std::mutex m_assignMutex;
|
|
std::shared_ptr<CD3D11Device> m_dx11Device;
|
|
|
|
CIndirectDeviceContext * m_devContext;
|
|
std::unique_ptr<CSwapChainProcessor> m_swapChain;
|
|
|
|
// Incremented whenever the current assignment is replaced or unassigned.
|
|
// Device creation is performed outside m_lock, so this lets an unassign
|
|
// cancel that work before a processor is started on a stale swap chain.
|
|
std::atomic<UINT64> m_assignmentGeneration = 0;
|
|
|
|
void DetachSwapChain();
|
|
|
|
public:
|
|
CIndirectMonitorContext(_In_ IDDCX_MONITOR monitor, CIndirectDeviceContext * device);
|
|
|
|
virtual ~CIndirectMonitorContext();
|
|
|
|
NTSTATUS AssignSwapChain(
|
|
IDDCX_SWAPCHAIN swapChain, LUID renderAdapter, HANDLE newFrameEvent);
|
|
void UnassignSwapChain();
|
|
bool IsAssignmentCurrent(UINT64 generation) const
|
|
{
|
|
return m_assignmentGeneration.load(std::memory_order_acquire) == generation;
|
|
}
|
|
|
|
CIndirectDeviceContext * GetDeviceContext() { return m_devContext; }
|
|
};
|
|
|
|
struct CIndirectMonitorContextWrapper
|
|
{
|
|
CIndirectMonitorContext* context;
|
|
|
|
void Cleanup()
|
|
{
|
|
delete context;
|
|
context = nullptr;
|
|
}
|
|
};
|
|
|
|
WDF_DECLARE_CONTEXT_TYPE(CIndirectMonitorContextWrapper);
|