widget/windows/CompositorWidgetParent.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 #include "CompositorWidgetParent.h"
   6
   7 #include "mozilla/Unused.h"
   8 #include "mozilla/StaticPrefs_layers.h"
   9 #include "mozilla/gfx/DeviceManagerDx.h"
  10 #include "mozilla/gfx/Point.h"
  11 #include "mozilla/layers/Compositor.h"
  12 #include "mozilla/layers/CompositorBridgeParent.h"
  13 #include "mozilla/layers/CompositorThread.h"
  14 #include "mozilla/webrender/RenderThread.h"
  15 #include "mozilla/widget/PlatformWidgetTypes.h"
  16 #include "nsWindow.h"
  17 #include "VsyncDispatcher.h"
  18 #include "WinCompositorWindowThread.h"
  19 #include "VRShMem.h"
  20 #include "RemoteBackbuffer.h"
  21
  22 #include <ddraw.h>
  23
  24 namespace mozilla {
  25 namespace widget {
  26
  27 using namespace mozilla::gfx;
  28 using namespace mozilla;
  29
  30 CompositorWidgetParent::CompositorWidgetParent(
  31     const CompositorWidgetInitData& aInitData,
  32     const layers::CompositorOptions& aOptions)
  33     : WinCompositorWidget(aInitData.get_WinCompositorWidgetInitData(),
  34                           aOptions),
  35       mWnd(reinterpret_cast<HWND>(
  36           aInitData.get_WinCompositorWidgetInitData().hWnd())),
  37       mTransparencyMode(uint32_t(
  38           aInitData.get_WinCompositorWidgetInitData().transparencyMode())),
  39       mSizeMode(nsSizeMode_Normal),
  40       mIsFullyOccluded(false),
  41       mRemoteBackbufferClient() {
  42   MOZ_ASSERT(XRE_GetProcessType() == GeckoProcessType_GPU);
  43   MOZ_ASSERT(mWnd && ::IsWindow(mWnd));
  44 }
  45
  46 CompositorWidgetParent::~CompositorWidgetParent() {}
  47
  48 bool CompositorWidgetParent::Initialize(
  49     const RemoteBackbufferHandles& aRemoteHandles) {
  50   mRemoteBackbufferClient = std::make_unique<remote_backbuffer::Client>();
  51   if (!mRemoteBackbufferClient->Initialize(aRemoteHandles)) {
  52     return false;
  53   }
  54
  55   return true;
  56 }
  57
  58 bool CompositorWidgetParent::PreRender(WidgetRenderingContext* aContext) {
  59   // This can block waiting for WM_SETTEXT to finish
  60   // Using PreRender is unnecessarily pessimistic because
  61   // we technically only need to block during the present call
  62   // not all of compositor rendering
  63   mPresentLock.Enter();
  64   return true;
  65 }
  66
  67 void CompositorWidgetParent::PostRender(WidgetRenderingContext* aContext) {
  68   mPresentLock.Leave();
  69 }
  70
  71 LayoutDeviceIntSize CompositorWidgetParent::GetClientSize() {
  72   RECT r;
  73   if (!::GetClientRect(mWnd, &r)) {
  74     return LayoutDeviceIntSize();
  75   }
  76   return LayoutDeviceIntSize(r.right - r.left, r.bottom - r.top);
  77 }
  78
  79 already_AddRefed<gfx::DrawTarget>
  80 CompositorWidgetParent::StartRemoteDrawingInRegion(
  81     const LayoutDeviceIntRegion& aInvalidRegion,
  82     layers::BufferMode* aBufferMode) {
  83   MOZ_ASSERT(mRemoteBackbufferClient);
  84   MOZ_ASSERT(aBufferMode);
  85
  86   // Because we use remote backbuffering, there is no need to use a local
  87   // backbuffer too.
  88   (*aBufferMode) = layers::BufferMode::BUFFER_NONE;
  89
  90   return mRemoteBackbufferClient->BorrowDrawTarget();
  91 }
  92
  93 void CompositorWidgetParent::EndRemoteDrawingInRegion(
  94     gfx::DrawTarget* aDrawTarget, const LayoutDeviceIntRegion& aInvalidRegion) {
  95   Unused << mRemoteBackbufferClient->PresentDrawTarget(
  96       aInvalidRegion.ToUnknownRegion());
  97 }
  98
  99 bool CompositorWidgetParent::NeedsToDeferEndRemoteDrawing() { return false; }
 100
 101 already_AddRefed<gfx::DrawTarget>
 102 CompositorWidgetParent::GetBackBufferDrawTarget(gfx::DrawTarget* aScreenTarget,
 103                                                 const gfx::IntRect& aRect,
 104                                                 bool* aOutIsCleared) {
 105   MOZ_CRASH(
 106       "Unexpected call to GetBackBufferDrawTarget() with remote "
 107       "backbuffering in use");
 108 }
 109
 110 already_AddRefed<gfx::SourceSurface>
 111 CompositorWidgetParent::EndBackBufferDrawing() {
 112   MOZ_CRASH(
 113       "Unexpected call to EndBackBufferDrawing() with remote "
 114       "backbuffering in use");
 115 }
 116
 117 bool CompositorWidgetParent::InitCompositor(layers::Compositor* aCompositor) {
 118   return true;
 119 }
 120
 121 bool CompositorWidgetParent::IsHidden() const { return ::IsIconic(mWnd); }
 122
 123 mozilla::ipc::IPCResult CompositorWidgetParent::RecvInitialize(
 124     const RemoteBackbufferHandles& aRemoteHandles) {
 125   Unused << Initialize(aRemoteHandles);
 126   return IPC_OK();
 127 }
 128
 129 mozilla::ipc::IPCResult CompositorWidgetParent::RecvEnterPresentLock() {
 130   mPresentLock.Enter();
 131   return IPC_OK();
 132 }
 133
 134 mozilla::ipc::IPCResult CompositorWidgetParent::RecvLeavePresentLock() {
 135   mPresentLock.Leave();
 136   return IPC_OK();
 137 }
 138
 139 mozilla::ipc::IPCResult CompositorWidgetParent::RecvUpdateTransparency(
 140     const TransparencyMode& aMode) {
 141   mTransparencyMode = uint32_t(aMode);
 142   return IPC_OK();
 143 }
 144
 145 mozilla::ipc::IPCResult CompositorWidgetParent::RecvNotifyVisibilityUpdated(
 146     const nsSizeMode& aSizeMode, const bool& aIsFullyOccluded) {
 147   mSizeMode = aSizeMode;
 148   mIsFullyOccluded = aIsFullyOccluded;
 149   return IPC_OK();
 150 }
 151
 152 nsSizeMode CompositorWidgetParent::GetWindowSizeMode() const {
 153   return mSizeMode;
 154 }
 155
 156 bool CompositorWidgetParent::GetWindowIsFullyOccluded() const {
 157   return mIsFullyOccluded;
 158 }
 159
 160 mozilla::ipc::IPCResult CompositorWidgetParent::RecvClearTransparentWindow() {
 161   gfx::CriticalSectionAutoEnter lock(&mPresentLock);
 162
 163   RefPtr<DrawTarget> drawTarget = mRemoteBackbufferClient->BorrowDrawTarget();
 164   if (!drawTarget) {
 165     return IPC_OK();
 166   }
 167
 168   IntSize size = drawTarget->GetSize();
 169   if (size.IsEmpty()) {
 170     return IPC_OK();
 171   }
 172
 173   drawTarget->ClearRect(Rect(0, 0, size.width, size.height));
 174
 175   Unused << mRemoteBackbufferClient->PresentDrawTarget(
 176       IntRect(0, 0, size.width, size.height));
 177
 178   return IPC_OK();
 179 }
 180
 181 nsIWidget* CompositorWidgetParent::RealWidget() { return nullptr; }
 182
 183 void CompositorWidgetParent::ObserveVsync(VsyncObserver* aObserver) {
 184   if (aObserver) {
 185     Unused << SendObserveVsync();
 186   } else {
 187     Unused << SendUnobserveVsync();
 188   }
 189   mVsyncObserver = aObserver;
 190 }
 191
 192 RefPtr<VsyncObserver> CompositorWidgetParent::GetVsyncObserver() const {
 193   MOZ_ASSERT(XRE_GetProcessType() == GeckoProcessType_GPU);
 194   return mVsyncObserver;
 195 }
 196
 197 void CompositorWidgetParent::UpdateCompositorWnd(const HWND aCompositorWnd,
 198                                                  const HWND aParentWnd) {
 199   MOZ_ASSERT(layers::CompositorThreadHolder::IsInCompositorThread());
 200   MOZ_ASSERT(mRootLayerTreeID.isSome());
 201
 202   RefPtr<CompositorWidgetParent> self = this;
 203   SendUpdateCompositorWnd(reinterpret_cast<WindowsHandle>(aCompositorWnd),
 204                           reinterpret_cast<WindowsHandle>(aParentWnd))
 205       ->Then(
 206           layers::CompositorThread(), __func__,
 207           [self](const bool& aSuccess) {
 208             if (aSuccess && self->mRootLayerTreeID.isSome() &&
 209                 layers::CompositorThreadHolder::IsActive()) {
 210               self->mSetParentCompleted = true;
 211               // Schedule composition after ::SetParent() call in parent
 212               // process.
 213               layers::CompositorBridgeParent::ScheduleForcedComposition(
 214                   self->mRootLayerTreeID.ref(), wr::RenderReasons::WIDGET);
 215             }
 216           },
 217           [self](const mozilla::ipc::ResponseRejectReason&) {});
 218 }
 219
 220 void CompositorWidgetParent::SetRootLayerTreeID(
 221     const layers::LayersId& aRootLayerTreeId) {
 222   mRootLayerTreeID = Some(aRootLayerTreeId);
 223 }
 224
 225 void CompositorWidgetParent::ActorDestroy(ActorDestroyReason aWhy) {}
 226
 227 }  // namespace widget
 228 }  // namespace mozilla