1 files changed, 114 insertions, 0 deletions
diff --git a/widget/windows/CompositorWidgetChild.cpp b/widget/windows/CompositorWidgetChild.cpp
new file mode 100644
index 0000000000..b294efef51
--- /dev/null
+++ b/widget/windows/CompositorWidgetChild.cpp
@@ -0,0 +1,114 @@
+/* -*- 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/. */
+
+#include "CompositorWidgetChild.h"
+#include "mozilla/Unused.h"
+#include "mozilla/gfx/Logging.h"
+#include "mozilla/widget/CompositorWidgetVsyncObserver.h"
+#include "mozilla/widget/PlatformWidgetTypes.h"
+#include "nsBaseWidget.h"
+#include "VsyncDispatcher.h"
+#include "gfxPlatform.h"
+#include "RemoteBackbuffer.h"
+
+namespace mozilla {
+namespace widget {
+
+CompositorWidgetChild::CompositorWidgetChild(
+    RefPtr<CompositorVsyncDispatcher> aVsyncDispatcher,
+    RefPtr<CompositorWidgetVsyncObserver> aVsyncObserver,
+    const CompositorWidgetInitData& aInitData)
+    : mVsyncDispatcher(aVsyncDispatcher),
+      mVsyncObserver(aVsyncObserver),
+      mCompositorWnd(nullptr),
+      mWnd(reinterpret_cast<HWND>(
+          aInitData.get_WinCompositorWidgetInitData().hWnd())),
+      mTransparencyMode(
+          aInitData.get_WinCompositorWidgetInitData().transparencyMode()),
+      mRemoteBackbufferProvider() {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(!gfxPlatform::IsHeadless());
+  MOZ_ASSERT(mWnd && ::IsWindow(mWnd));
+}
+
+CompositorWidgetChild::~CompositorWidgetChild() {}
+
+bool CompositorWidgetChild::Initialize() {
+  mRemoteBackbufferProvider = std::make_unique<remote_backbuffer::Provider>();
+  if (!mRemoteBackbufferProvider->Initialize(mWnd, OtherPid(),
+                                             mTransparencyMode)) {
+    return false;
+  }
+
+  auto maybeRemoteHandles = mRemoteBackbufferProvider->CreateRemoteHandles();
+  if (!maybeRemoteHandles) {
+    return false;
+  }
+
+  Unused << SendInitialize(*maybeRemoteHandles);
+
+  return true;
+}
+
+void CompositorWidgetChild::EnterPresentLock() {
+  Unused << SendEnterPresentLock();
+}
+
+void CompositorWidgetChild::LeavePresentLock() {
+  Unused << SendLeavePresentLock();
+}
+
+void CompositorWidgetChild::OnDestroyWindow() {}
+
+bool CompositorWidgetChild::OnWindowResize(const LayoutDeviceIntSize& aSize) {
+  return true;
+}
+
+void CompositorWidgetChild::OnWindowModeChange(nsSizeMode aSizeMode) {}
+
+void CompositorWidgetChild::UpdateTransparency(TransparencyMode aMode) {
+  mTransparencyMode = aMode;
+  mRemoteBackbufferProvider->UpdateTransparencyMode(aMode);
+  Unused << SendUpdateTransparency(aMode);
+}
+
+void CompositorWidgetChild::NotifyVisibilityUpdated(nsSizeMode aSizeMode,
+                                                    bool aIsFullyOccluded) {
+  Unused << SendNotifyVisibilityUpdated(aSizeMode, aIsFullyOccluded);
+};
+
+void CompositorWidgetChild::ClearTransparentWindow() {
+  Unused << SendClearTransparentWindow();
+}
+
+mozilla::ipc::IPCResult CompositorWidgetChild::RecvObserveVsync() {
+  mVsyncDispatcher->SetCompositorVsyncObserver(mVsyncObserver);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult CompositorWidgetChild::RecvUnobserveVsync() {
+  mVsyncDispatcher->SetCompositorVsyncObserver(nullptr);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult CompositorWidgetChild::RecvUpdateCompositorWnd(
+    const WindowsHandle& aCompositorWnd, const WindowsHandle& aParentWnd,
+    UpdateCompositorWndResolver&& aResolve) {
+  HWND parentWnd = reinterpret_cast<HWND>(aParentWnd);
+  if (mWnd == parentWnd) {
+    mCompositorWnd = reinterpret_cast<HWND>(aCompositorWnd);
+    ::SetParent(mCompositorWnd, mWnd);
+    aResolve(true);
+  } else {
+    aResolve(false);
+    gfxCriticalNote << "Parent winow does not match";
+    MOZ_ASSERT_UNREACHABLE("unexpected to happen");
+  }
+
+  return IPC_OK();
+}
+
+}  // namespace widget
+}  // namespace mozilla