зеркало из https://github.com/mozilla/gecko-dev.git
76 строки
2.4 KiB
C++
76 строки
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* 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 GFX_READBACKMANAGERD3D10_H
|
|
#define GFX_READBACKMANAGERD3D10_H
|
|
|
|
#include <windows.h>
|
|
#include <d3d10_1.h>
|
|
|
|
#include "nsTArray.h"
|
|
#include "nsAutoPtr.h"
|
|
#include "gfxPoint.h"
|
|
|
|
namespace mozilla {
|
|
namespace layers {
|
|
|
|
DWORD WINAPI StartTaskThread(void *aManager);
|
|
|
|
struct ReadbackTask;
|
|
|
|
class ReadbackManagerD3D10 MOZ_FINAL : public IUnknown
|
|
{
|
|
public:
|
|
ReadbackManagerD3D10();
|
|
~ReadbackManagerD3D10();
|
|
|
|
/**
|
|
* Tell the readback manager to post a readback task.
|
|
*
|
|
* @param aTexture D3D10_USAGE_STAGING texture that will contain the data that
|
|
* was readback.
|
|
* @param aUpdate ReadbackProcessor::Update object. This is a void pointer
|
|
* since we cannot forward declare a nested class, and do not
|
|
* export ReadbackProcessor.h
|
|
* @param aOrigin Origin of the aTexture surface in the ThebesLayer
|
|
* coordinate system.
|
|
*/
|
|
void PostTask(ID3D10Texture2D *aTexture, void *aUpdate, const gfxPoint &aOrigin);
|
|
|
|
virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid,
|
|
void **ppvObject);
|
|
virtual ULONG STDMETHODCALLTYPE AddRef(void);
|
|
virtual ULONG STDMETHODCALLTYPE Release(void);
|
|
|
|
private:
|
|
friend DWORD WINAPI StartTaskThread(void *aManager);
|
|
|
|
void ProcessTasks();
|
|
|
|
// The invariant maintained by |mTaskSemaphore| is that the readback thread
|
|
// will awaken from WaitForMultipleObjects() at least once per readback
|
|
// task enqueued by the main thread. Since the readback thread processes
|
|
// exactly one task per wakeup (with one exception), no tasks are lost. The
|
|
// exception is when the readback thread is shut down, which orphans the
|
|
// remaining tasks, on purpose.
|
|
HANDLE mTaskSemaphore;
|
|
// Event signaled when the task thread should shutdown
|
|
HANDLE mShutdownEvent;
|
|
// Handle to the task thread
|
|
HANDLE mTaskThread;
|
|
|
|
// FiFo list of readback tasks that are to be executed. Access is synchronized
|
|
// by mTaskMutex.
|
|
CRITICAL_SECTION mTaskMutex;
|
|
nsTArray<nsAutoPtr<ReadbackTask>> mPendingReadbackTasks;
|
|
|
|
ULONG mRefCnt;
|
|
};
|
|
|
|
}
|
|
}
|
|
|
|
#endif /* GFX_READBACKMANAGERD3D10_H */
|