1 files changed, 111 insertions, 0 deletions
diff --git a/widget/windows/InProcessWinCompositorWidget.h b/widget/windows/InProcessWinCompositorWidget.h
new file mode 100644
index 0000000000..e287204461
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+++ b/widget/windows/InProcessWinCompositorWidget.h
@@ -0,0 +1,111 @@
+/* -*- 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_InProcessWinCompositorWidget_h
+#define widget_windows_InProcessWinCompositorWidget_h
+
+#include "WinCompositorWidget.h"
+
+class nsWindow;
+class gfxASurface;
+
+namespace mozilla::widget {
+
+// This is the Windows-specific implementation of CompositorWidget. For
+// the most part it only requires an HWND, however it maintains extra state
+// for transparent windows, as well as for synchronizing WM_SETTEXT messages
+// with the compositor.
+class InProcessWinCompositorWidget final
+    : public WinCompositorWidget,
+      public PlatformCompositorWidgetDelegate {
+ public:
+  InProcessWinCompositorWidget(const WinCompositorWidgetInitData& aInitData,
+                               const layers::CompositorOptions& aOptions,
+                               nsWindow* aWindow);
+
+  bool PreRender(WidgetRenderingContext*) override;
+  void PostRender(WidgetRenderingContext*) override;
+  already_AddRefed<gfx::DrawTarget> StartRemoteDrawing() override;
+  void EndRemoteDrawing() override;
+  bool NeedsToDeferEndRemoteDrawing() override;
+  LayoutDeviceIntSize GetClientSize() override;
+  already_AddRefed<gfx::DrawTarget> GetBackBufferDrawTarget(
+      gfx::DrawTarget* aScreenTarget, const gfx::IntRect& aRect,
+      bool* aOutIsCleared) override;
+  already_AddRefed<gfx::SourceSurface> EndBackBufferDrawing() override;
+  bool InitCompositor(layers::Compositor* aCompositor) override;
+  CompositorWidgetDelegate* AsDelegate() override { return this; }
+  bool IsHidden() const override;
+
+  // PlatformCompositorWidgetDelegate Overrides
+
+  void EnterPresentLock() override;
+  void LeavePresentLock() override;
+  void OnDestroyWindow() override;
+  bool OnWindowResize(const LayoutDeviceIntSize& aSize) override;
+  void OnWindowModeChange(nsSizeMode aSizeMode) override;
+  void UpdateTransparency(TransparencyMode aMode) override;
+  void NotifyVisibilityUpdated(nsSizeMode aSizeMode,
+                               bool aIsFullyOccluded) override;
+  void ClearTransparentWindow() override;
+
+  bool RedrawTransparentWindow();
+
+  // Ensure that a transparent surface exists, then return it.
+  RefPtr<gfxASurface> EnsureTransparentSurface();
+
+  HDC GetTransparentDC() const { return mMemoryDC; }
+
+  mozilla::Mutex& GetTransparentSurfaceLock() {
+    return mTransparentSurfaceLock;
+  }
+
+  nsSizeMode GetWindowSizeMode() const override;
+  bool GetWindowIsFullyOccluded() const override;
+
+  void ObserveVsync(VsyncObserver* aObserver) override;
+  nsIWidget* RealWidget() override;
+
+  void UpdateCompositorWnd(const HWND aCompositorWnd,
+                           const HWND aParentWnd) override;
+  void SetRootLayerTreeID(const layers::LayersId& aRootLayerTreeId) override {}
+
+ private:
+  HDC GetWindowSurface();
+  void FreeWindowSurface(HDC dc);
+
+  void CreateTransparentSurface(const gfx::IntSize& aSize);
+
+  nsWindow* mWindow;
+
+  HWND mWnd;
+
+  gfx::CriticalSection mPresentLock;
+
+  // Transparency handling.
+  mozilla::Mutex mTransparentSurfaceLock MOZ_UNANNOTATED;
+  mozilla::Atomic<uint32_t, MemoryOrdering::Relaxed> mTransparencyMode;
+
+  bool TransparencyModeIs(TransparencyMode aMode) const {
+    return TransparencyMode(uint32_t(mTransparencyMode)) == aMode;
+  }
+
+  // Visibility handling.
+  mozilla::Atomic<nsSizeMode, MemoryOrdering::Relaxed> mSizeMode;
+  mozilla::Atomic<bool, MemoryOrdering::Relaxed> mIsFullyOccluded;
+
+  RefPtr<gfxASurface> mTransparentSurface;
+  HDC mMemoryDC;
+  HDC mCompositeDC;
+
+  // Locked back buffer of BasicCompositor
+  uint8_t* mLockedBackBufferData;
+
+  bool mNotDeferEndRemoteDrawing;
+};
+
+}  // namespace mozilla::widget
+
+#endif  // widget_windows_InProcessWinCompositorWidget_h