1 files changed, 232 insertions, 0 deletions
diff --git a/widget/windows/CompositorWidgetParent.cpp b/widget/windows/CompositorWidgetParent.cpp
new file mode 100644
index 0000000000..b25d30d9d5
--- /dev/null
+++ b/widget/windows/CompositorWidgetParent.cpp
@@ -0,0 +1,232 @@
+/* -*- 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 "CompositorWidgetParent.h"
+
+#include "mozilla/Unused.h"
+#include "mozilla/StaticPrefs_layers.h"
+#include "mozilla/gfx/DeviceManagerDx.h"
+#include "mozilla/gfx/Point.h"
+#include "mozilla/layers/Compositor.h"
+#include "mozilla/layers/CompositorBridgeParent.h"
+#include "mozilla/layers/CompositorThread.h"
+#include "mozilla/webrender/RenderThread.h"
+#include "mozilla/widget/PlatformWidgetTypes.h"
+#include "nsWindow.h"
+#include "VsyncDispatcher.h"
+#include "WinCompositorWindowThread.h"
+#include "VRShMem.h"
+#include "RemoteBackbuffer.h"
+
+#include <ddraw.h>
+
+namespace mozilla {
+namespace widget {
+
+using namespace mozilla::gfx;
+using namespace mozilla;
+
+CompositorWidgetParent::CompositorWidgetParent(
+    const CompositorWidgetInitData& aInitData,
+    const layers::CompositorOptions& aOptions)
+    : WinCompositorWidget(aInitData.get_WinCompositorWidgetInitData(),
+                          aOptions),
+      mWnd(reinterpret_cast<HWND>(
+          aInitData.get_WinCompositorWidgetInitData().hWnd())),
+      mTransparencyMode(uint32_t(
+          aInitData.get_WinCompositorWidgetInitData().transparencyMode())),
+      mSizeMode(nsSizeMode_Normal),
+      mIsFullyOccluded(false),
+      mRemoteBackbufferClient() {
+  MOZ_ASSERT(XRE_GetProcessType() == GeckoProcessType_GPU);
+  MOZ_ASSERT(mWnd && ::IsWindow(mWnd));
+}
+
+CompositorWidgetParent::~CompositorWidgetParent() {}
+
+bool CompositorWidgetParent::Initialize(
+    const RemoteBackbufferHandles& aRemoteHandles) {
+  mRemoteBackbufferClient = std::make_unique<remote_backbuffer::Client>();
+  if (!mRemoteBackbufferClient->Initialize(aRemoteHandles)) {
+    return false;
+  }
+
+  return true;
+}
+
+bool CompositorWidgetParent::PreRender(WidgetRenderingContext* aContext) {
+  // This can block waiting for WM_SETTEXT to finish
+  // Using PreRender is unnecessarily pessimistic because
+  // we technically only need to block during the present call
+  // not all of compositor rendering
+  mPresentLock.Enter();
+  return true;
+}
+
+void CompositorWidgetParent::PostRender(WidgetRenderingContext* aContext) {
+  mPresentLock.Leave();
+}
+
+LayoutDeviceIntSize CompositorWidgetParent::GetClientSize() {
+  RECT r;
+  if (!::GetClientRect(mWnd, &r)) {
+    return LayoutDeviceIntSize();
+  }
+  return LayoutDeviceIntSize(r.right - r.left, r.bottom - r.top);
+}
+
+already_AddRefed<gfx::DrawTarget>
+CompositorWidgetParent::StartRemoteDrawingInRegion(
+    const LayoutDeviceIntRegion& aInvalidRegion,
+    layers::BufferMode* aBufferMode) {
+  MOZ_ASSERT(mRemoteBackbufferClient);
+  MOZ_ASSERT(aBufferMode);
+
+  // Because we use remote backbuffering, there is no need to use a local
+  // backbuffer too.
+  (*aBufferMode) = layers::BufferMode::BUFFER_NONE;
+
+  return mRemoteBackbufferClient->BorrowDrawTarget();
+}
+
+void CompositorWidgetParent::EndRemoteDrawingInRegion(
+    gfx::DrawTarget* aDrawTarget, const LayoutDeviceIntRegion& aInvalidRegion) {
+  Unused << mRemoteBackbufferClient->PresentDrawTarget(
+      aInvalidRegion.ToUnknownRegion());
+}
+
+bool CompositorWidgetParent::NeedsToDeferEndRemoteDrawing() { return false; }
+
+already_AddRefed<gfx::DrawTarget>
+CompositorWidgetParent::GetBackBufferDrawTarget(gfx::DrawTarget* aScreenTarget,
+                                                const gfx::IntRect& aRect,
+                                                bool* aOutIsCleared) {
+  MOZ_CRASH(
+      "Unexpected call to GetBackBufferDrawTarget() with remote "
+      "backbuffering in use");
+}
+
+already_AddRefed<gfx::SourceSurface>
+CompositorWidgetParent::EndBackBufferDrawing() {
+  MOZ_CRASH(
+      "Unexpected call to EndBackBufferDrawing() with remote "
+      "backbuffering in use");
+}
+
+bool CompositorWidgetParent::InitCompositor(layers::Compositor* aCompositor) {
+  return true;
+}
+
+bool CompositorWidgetParent::IsHidden() const { return ::IsIconic(mWnd); }
+
+mozilla::ipc::IPCResult CompositorWidgetParent::RecvInitialize(
+    const RemoteBackbufferHandles& aRemoteHandles) {
+  Unused << Initialize(aRemoteHandles);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult CompositorWidgetParent::RecvEnterPresentLock() {
+  mPresentLock.Enter();
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult CompositorWidgetParent::RecvLeavePresentLock() {
+  mPresentLock.Leave();
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult CompositorWidgetParent::RecvUpdateTransparency(
+    const TransparencyMode& aMode) {
+  mTransparencyMode = uint32_t(aMode);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult CompositorWidgetParent::RecvNotifyVisibilityUpdated(
+    const nsSizeMode& aSizeMode, const bool& aIsFullyOccluded) {
+  mSizeMode = aSizeMode;
+  mIsFullyOccluded = aIsFullyOccluded;
+  return IPC_OK();
+}
+
+nsSizeMode CompositorWidgetParent::CompositorWidgetParent::GetWindowSizeMode()
+    const {
+  nsSizeMode sizeMode = mSizeMode;
+  return sizeMode;
+}
+
+bool CompositorWidgetParent::CompositorWidgetParent::GetWindowIsFullyOccluded()
+    const {
+  bool isFullyOccluded = mIsFullyOccluded;
+  return isFullyOccluded;
+}
+
+mozilla::ipc::IPCResult CompositorWidgetParent::RecvClearTransparentWindow() {
+  gfx::CriticalSectionAutoEnter lock(&mPresentLock);
+
+  RefPtr<DrawTarget> drawTarget = mRemoteBackbufferClient->BorrowDrawTarget();
+  if (!drawTarget) {
+    return IPC_OK();
+  }
+
+  IntSize size = drawTarget->GetSize();
+  if (size.IsEmpty()) {
+    return IPC_OK();
+  }
+
+  drawTarget->ClearRect(Rect(0, 0, size.width, size.height));
+
+  Unused << mRemoteBackbufferClient->PresentDrawTarget(
+      IntRect(0, 0, size.width, size.height));
+
+  return IPC_OK();
+}
+
+nsIWidget* CompositorWidgetParent::RealWidget() { return nullptr; }
+
+void CompositorWidgetParent::ObserveVsync(VsyncObserver* aObserver) {
+  if (aObserver) {
+    Unused << SendObserveVsync();
+  } else {
+    Unused << SendUnobserveVsync();
+  }
+  mVsyncObserver = aObserver;
+}
+
+RefPtr<VsyncObserver> CompositorWidgetParent::GetVsyncObserver() const {
+  MOZ_ASSERT(XRE_GetProcessType() == GeckoProcessType_GPU);
+  return mVsyncObserver;
+}
+
+void CompositorWidgetParent::UpdateCompositorWnd(const HWND aCompositorWnd,
+                                                 const HWND aParentWnd) {
+  MOZ_ASSERT(layers::CompositorThreadHolder::IsInCompositorThread());
+  MOZ_ASSERT(mRootLayerTreeID.isSome());
+
+  RefPtr<CompositorWidgetParent> self = this;
+  SendUpdateCompositorWnd(reinterpret_cast<WindowsHandle>(aCompositorWnd),
+                          reinterpret_cast<WindowsHandle>(aParentWnd))
+      ->Then(
+          layers::CompositorThread(), __func__,
+          [self](const bool& aSuccess) {
+            if (aSuccess && self->mRootLayerTreeID.isSome() &&
+                layers::CompositorThreadHolder::IsActive()) {
+              self->mSetParentCompleted = true;
+              // Schedule composition after ::SetParent() call in parent
+              // process.
+              layers::CompositorBridgeParent::ScheduleForcedComposition(
+                  self->mRootLayerTreeID.ref(), wr::RenderReasons::WIDGET);
+            }
+          },
+          [self](const mozilla::ipc::ResponseRejectReason&) {});
+}
+
+void CompositorWidgetParent::SetRootLayerTreeID(
+    const layers::LayersId& aRootLayerTreeId) {
+  mRootLayerTreeID = Some(aRootLayerTreeId);
+}
+
+void CompositorWidgetParent::ActorDestroy(ActorDestroyReason aWhy) {}
+
+}  // namespace widget
+}  // namespace mozilla