From 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 03:47:29 +0200
Subject: Adding upstream version 115.8.0esr.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 widget/windows/RemoteBackbuffer.h | 95 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 widget/windows/RemoteBackbuffer.h

(limited to 'widget/windows/RemoteBackbuffer.h')

diff --git a/widget/windows/RemoteBackbuffer.h b/widget/windows/RemoteBackbuffer.h
new file mode 100644
index 0000000000..5899e80984
--- /dev/null
+++ b/widget/windows/RemoteBackbuffer.h
@@ -0,0 +1,95 @@
+/* -*- 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
-- 
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