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-rw-r--r--widget/windows/RemoteBackbuffer.h95
1 files changed, 95 insertions, 0 deletions
diff --git a/widget/windows/RemoteBackbuffer.h b/widget/windows/RemoteBackbuffer.h
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+++ b/widget/windows/RemoteBackbuffer.h
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+/* -*- Mode: C++; tab-width: 2; 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 widget_windows_RemoteBackbuffer_h
+#define widget_windows_RemoteBackbuffer_h
+
+#include "nsIWidget.h"
+#include "mozilla/widget/PCompositorWidgetParent.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/gfx/2D.h"
+#include "prthread.h"
+#include <windows.h>
+
+namespace mozilla {
+namespace widget {
+namespace remote_backbuffer {
+
+struct IpcRect;
+struct SharedData;
+struct BorrowResponseData;
+struct PresentRequestData;
+struct PresentResponseData;
+class SharedImage;
+class PresentableSharedImage;
+
+class Provider {
+ public:
+ Provider();
+ ~Provider();
+
+ bool Initialize(HWND aWindowHandle, DWORD aTargetProcessId,
+ TransparencyMode aTransparencyMode);
+
+ Maybe<RemoteBackbufferHandles> CreateRemoteHandles();
+
+ void UpdateTransparencyMode(TransparencyMode aTransparencyMode);
+
+ Provider(const Provider&) = delete;
+ Provider(Provider&&) = delete;
+ Provider& operator=(const Provider&) = delete;
+ Provider& operator=(Provider&&) = delete;
+
+ private:
+ void ThreadMain();
+
+ void HandleBorrowRequest(BorrowResponseData* aResponseData,
+ bool aAllowSameBuffer);
+ void HandlePresentRequest(const PresentRequestData& aRequestData,
+ PresentResponseData* aResponseData);
+
+ HWND mWindowHandle;
+ HANDLE mTargetProcess;
+ HANDLE mFileMapping;
+ HANDLE mRequestReadyEvent;
+ HANDLE mResponseReadyEvent;
+ SharedData* mSharedDataPtr;
+ bool mStopServiceThread;
+ PRThread* mServiceThread;
+ std::unique_ptr<PresentableSharedImage> mBackbuffer;
+ mozilla::Atomic<uint32_t, MemoryOrdering::Relaxed> mTransparencyMode;
+ TransparencyMode GetTransparencyMode() const {
+ return TransparencyMode(uint32_t(mTransparencyMode));
+ }
+};
+
+class Client {
+ public:
+ Client();
+ ~Client();
+
+ bool Initialize(const RemoteBackbufferHandles& aRemoteHandles);
+
+ already_AddRefed<gfx::DrawTarget> BorrowDrawTarget();
+ bool PresentDrawTarget(gfx::IntRegion aDirtyRegion);
+
+ Client(const Client&) = delete;
+ Client(Client&&) = delete;
+ Client& operator=(const Client&) = delete;
+ Client& operator=(Client&&) = delete;
+
+ private:
+ HANDLE mFileMapping;
+ HANDLE mRequestReadyEvent;
+ HANDLE mResponseReadyEvent;
+ SharedData* mSharedDataPtr;
+ std::unique_ptr<SharedImage> mBackbuffer;
+};
+
+} // namespace remote_backbuffer
+} // namespace widget
+} // namespace mozilla
+
+#endif // widget_windows_RemoteBackbuffer_h