widget/windows/InProcessWinCompositorWidget.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef widget_windows_InProcessWinCompositorWidget_h
   7 #define widget_windows_InProcessWinCompositorWidget_h
   8
   9 #include "WinCompositorWidget.h"
  10
  11 class nsWindow;
  12 class gfxASurface;
  13
  14 namespace mozilla {
  15 namespace widget {
  16
  17 // This is the Windows-specific implementation of CompositorWidget. For
  18 // the most part it only requires an HWND, however it maintains extra state
  19 // for transparent windows, as well as for synchronizing WM_SETTEXT messages
  20 // with the compositor.
  21 class InProcessWinCompositorWidget final
  22     : public WinCompositorWidget,
  23       public PlatformCompositorWidgetDelegate {
  24  public:
  25   InProcessWinCompositorWidget(const WinCompositorWidgetInitData& aInitData,
  26                                const layers::CompositorOptions& aOptions,
  27                                nsWindow* aWindow);
  28
  29   bool PreRender(WidgetRenderingContext*) override;
  30   void PostRender(WidgetRenderingContext*) override;
  31   already_AddRefed<gfx::DrawTarget> StartRemoteDrawing() override;
  32   void EndRemoteDrawing() override;
  33   bool NeedsToDeferEndRemoteDrawing() override;
  34   LayoutDeviceIntSize GetClientSize() override;
  35   already_AddRefed<gfx::DrawTarget> GetBackBufferDrawTarget(
  36       gfx::DrawTarget* aScreenTarget, const gfx::IntRect& aRect,
  37       bool* aOutIsCleared) override;
  38   already_AddRefed<gfx::SourceSurface> EndBackBufferDrawing() override;
  39   bool InitCompositor(layers::Compositor* aCompositor) override;
  40   CompositorWidgetDelegate* AsDelegate() override { return this; }
  41   bool IsHidden() const override;
  42
  43   // PlatformCompositorWidgetDelegate Overrides
  44
  45   void EnterPresentLock() override;
  46   void LeavePresentLock() override;
  47   void OnDestroyWindow() override;
  48   bool OnWindowResize(const LayoutDeviceIntSize& aSize) override;
  49   void OnWindowModeChange(nsSizeMode aSizeMode) override;
  50   void UpdateTransparency(nsTransparencyMode aMode) override;
  51   void NotifyVisibilityUpdated(nsSizeMode aSizeMode,
  52                                bool aIsFullyOccluded) override;
  53   void ClearTransparentWindow() override;
  54
  55   bool RedrawTransparentWindow();
  56
  57   // Ensure that a transparent surface exists, then return it.
  58   RefPtr<gfxASurface> EnsureTransparentSurface();
  59
  60   HDC GetTransparentDC() const { return mMemoryDC; }
  61
  62   mozilla::Mutex& GetTransparentSurfaceLock() {
  63     return mTransparentSurfaceLock;
  64   }
  65
  66   bool HasGlass() const override;
  67
  68   nsSizeMode GetWindowSizeMode() const override;
  69   bool GetWindowIsFullyOccluded() const override;
  70
  71   void ObserveVsync(VsyncObserver* aObserver) override;
  72   nsIWidget* RealWidget() override;
  73
  74   void UpdateCompositorWnd(const HWND aCompositorWnd,
  75                            const HWND aParentWnd) override {}
  76   void SetRootLayerTreeID(const layers::LayersId& aRootLayerTreeId) override {}
  77
  78  private:
  79   HDC GetWindowSurface();
  80   void FreeWindowSurface(HDC dc);
  81
  82   void CreateTransparentSurface(const gfx::IntSize& aSize);
  83
  84   nsWindow* mWindow;
  85
  86   HWND mWnd;
  87
  88   gfx::CriticalSection mPresentLock;
  89
  90   // Transparency handling.
  91   mozilla::Mutex mTransparentSurfaceLock MOZ_UNANNOTATED;
  92   mozilla::Atomic<nsTransparencyMode, MemoryOrdering::Relaxed>
  93       mTransparencyMode;
  94
  95   // Visibility handling.
  96   mozilla::Atomic<nsSizeMode, MemoryOrdering::Relaxed> mSizeMode;
  97   mozilla::Atomic<bool, MemoryOrdering::Relaxed> mIsFullyOccluded;
  98
  99   RefPtr<gfxASurface> mTransparentSurface;
 100   HDC mMemoryDC;
 101   HDC mCompositeDC;
 102
 103   // Locked back buffer of BasicCompositor
 104   uint8_t* mLockedBackBufferData;
 105
 106   bool mNotDeferEndRemoteDrawing;
 107 };
 108
 109 }  // namespace widget
 110 }  // namespace mozilla
 111
 112 #endif  // widget_windows_InProcessWinCompositorWidget_h