widget/windows/CompositorWidgetChild.cpp

   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 #include "CompositorWidgetChild.h"
   7 #include "mozilla/Unused.h"
   8 #include "mozilla/gfx/Logging.h"
   9 #include "mozilla/widget/CompositorWidgetVsyncObserver.h"
  10 #include "mozilla/widget/PlatformWidgetTypes.h"
  11 #include "nsBaseWidget.h"
  12 #include "VsyncDispatcher.h"
  13 #include "gfxPlatform.h"
  14 #include "RemoteBackbuffer.h"
  15
  16 namespace mozilla {
  17 namespace widget {
  18
  19 CompositorWidgetChild::CompositorWidgetChild(
  20     RefPtr<CompositorVsyncDispatcher> aVsyncDispatcher,
  21     RefPtr<CompositorWidgetVsyncObserver> aVsyncObserver,
  22     const CompositorWidgetInitData& aInitData)
  23     : mVsyncDispatcher(aVsyncDispatcher),
  24       mVsyncObserver(aVsyncObserver),
  25       mCompositorWnd(nullptr),
  26       mWnd(reinterpret_cast<HWND>(
  27           aInitData.get_WinCompositorWidgetInitData().hWnd())),
  28       mTransparencyMode(
  29           aInitData.get_WinCompositorWidgetInitData().transparencyMode()),
  30       mRemoteBackbufferProvider() {
  31   MOZ_ASSERT(XRE_IsParentProcess());
  32   MOZ_ASSERT(!gfxPlatform::IsHeadless());
  33   MOZ_ASSERT(mWnd && ::IsWindow(mWnd));
  34 }
  35
  36 CompositorWidgetChild::~CompositorWidgetChild() {}
  37
  38 bool CompositorWidgetChild::Initialize() {
  39   mRemoteBackbufferProvider = std::make_unique<remote_backbuffer::Provider>();
  40   if (!mRemoteBackbufferProvider->Initialize(mWnd, OtherPid(),
  41                                              mTransparencyMode)) {
  42     return false;
  43   }
  44
  45   auto maybeRemoteHandles = mRemoteBackbufferProvider->CreateRemoteHandles();
  46   if (!maybeRemoteHandles) {
  47     return false;
  48   }
  49
  50   Unused << SendInitialize(*maybeRemoteHandles);
  51
  52   return true;
  53 }
  54
  55 void CompositorWidgetChild::EnterPresentLock() {
  56   Unused << SendEnterPresentLock();
  57 }
  58
  59 void CompositorWidgetChild::LeavePresentLock() {
  60   Unused << SendLeavePresentLock();
  61 }
  62
  63 void CompositorWidgetChild::OnDestroyWindow() {}
  64
  65 bool CompositorWidgetChild::OnWindowResize(const LayoutDeviceIntSize& aSize) {
  66   return true;
  67 }
  68
  69 void CompositorWidgetChild::OnWindowModeChange(nsSizeMode aSizeMode) {}
  70
  71 void CompositorWidgetChild::UpdateTransparency(TransparencyMode aMode) {
  72   mTransparencyMode = aMode;
  73   mRemoteBackbufferProvider->UpdateTransparencyMode(aMode);
  74   Unused << SendUpdateTransparency(aMode);
  75 }
  76
  77 void CompositorWidgetChild::NotifyVisibilityUpdated(nsSizeMode aSizeMode,
  78                                                     bool aIsFullyOccluded) {
  79   Unused << SendNotifyVisibilityUpdated(aSizeMode, aIsFullyOccluded);
  80 };
  81
  82 void CompositorWidgetChild::ClearTransparentWindow() {
  83   Unused << SendClearTransparentWindow();
  84 }
  85
  86 mozilla::ipc::IPCResult CompositorWidgetChild::RecvObserveVsync() {
  87   mVsyncDispatcher->SetCompositorVsyncObserver(mVsyncObserver);
  88   return IPC_OK();
  89 }
  90
  91 mozilla::ipc::IPCResult CompositorWidgetChild::RecvUnobserveVsync() {
  92   mVsyncDispatcher->SetCompositorVsyncObserver(nullptr);
  93   return IPC_OK();
  94 }
  95
  96 mozilla::ipc::IPCResult CompositorWidgetChild::RecvUpdateCompositorWnd(
  97     const WindowsHandle& aCompositorWnd, const WindowsHandle& aParentWnd,
  98     UpdateCompositorWndResolver&& aResolve) {
  99   HWND parentWnd = reinterpret_cast<HWND>(aParentWnd);
 100   if (mWnd == parentWnd) {
 101     mCompositorWnd = reinterpret_cast<HWND>(aCompositorWnd);
 102     ::SetParent(mCompositorWnd, mWnd);
 103     aResolve(true);
 104   } else {
 105     aResolve(false);
 106     gfxCriticalNote << "Parent winow does not match";
 107     MOZ_ASSERT_UNREACHABLE("unexpected to happen");
 108   }
 109
 110   return IPC_OK();
 111 }
 112
 113 }  // namespace widget
 114 }  // namespace mozilla