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 "WinCompositorWidget.h"
7
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/CompositorThread.h"
13 #include "mozilla/webrender/RenderThread.h"
14 #include "mozilla/widget/PlatformWidgetTypes.h"
15 #include "nsWindow.h"
16 #include "VsyncDispatcher.h"
17 #include "WinCompositorWindowThread.h"
18 #include "VRShMem.h"
19
20 #include <ddraw.h>
21
22 namespace mozilla {
23 namespace widget {
24
25 using namespace mozilla::gfx;
26 using namespace mozilla;
27
WinCompositorWidget(const WinCompositorWidgetInitData & aInitData,const layers::CompositorOptions & aOptions)28 WinCompositorWidget::WinCompositorWidget(
29 const WinCompositorWidgetInitData& aInitData,
30 const layers::CompositorOptions& aOptions)
31 : CompositorWidget(aOptions),
32 mSetParentCompleted(false),
33 mWidgetKey(aInitData.widgetKey()),
34 mWnd(reinterpret_cast<HWND>(aInitData.hWnd())),
35 mCompositorWnds(nullptr, nullptr) {
36 MOZ_ASSERT(mWnd && ::IsWindow(mWnd));
37 }
38
~WinCompositorWidget()39 WinCompositorWidget::~WinCompositorWidget() { DestroyCompositorWindow(); }
40
GetWidgetKey()41 uintptr_t WinCompositorWidget::GetWidgetKey() { return mWidgetKey; }
42
EnsureCompositorWindow()43 void WinCompositorWidget::EnsureCompositorWindow() {
44 if (mCompositorWnds.mCompositorWnd || mCompositorWnds.mInitialParentWnd) {
45 return;
46 }
47
48 mCompositorWnds = WinCompositorWindowThread::CreateCompositorWindow();
49 UpdateCompositorWnd(mCompositorWnds.mCompositorWnd, mWnd);
50
51 MOZ_ASSERT(mCompositorWnds.mCompositorWnd);
52 MOZ_ASSERT(mCompositorWnds.mInitialParentWnd);
53 }
54
DestroyCompositorWindow()55 void WinCompositorWidget::DestroyCompositorWindow() {
56 if (!mCompositorWnds.mCompositorWnd && !mCompositorWnds.mInitialParentWnd) {
57 return;
58 }
59 WinCompositorWindowThread::DestroyCompositorWindow(mCompositorWnds);
60 mCompositorWnds = WinCompositorWnds(nullptr, nullptr);
61 }
62
UpdateCompositorWndSizeIfNecessary()63 void WinCompositorWidget::UpdateCompositorWndSizeIfNecessary() {
64 if (!mCompositorWnds.mCompositorWnd) {
65 return;
66 }
67
68 LayoutDeviceIntSize size = GetClientSize();
69 if (mLastCompositorWndSize == size) {
70 return;
71 }
72
73 // This code is racing with the compositor, which needs to reparent
74 // the compositor surface to the actual window (mWnd). To avoid racing
75 // mutations, we refuse to proceed until ::SetParent() is called in parent
76 // process. After the ::SetParent() call, composition is scheduled in
77 // CompositorWidgetParent::UpdateCompositorWnd().
78 if (!mSetParentCompleted) {
79 // ::SetParent() is not completed yet.
80 return;
81 }
82
83 MOZ_ASSERT(mWnd == ::GetParent(mCompositorWnds.mCompositorWnd));
84
85 // Force a resize and redraw (but not a move, activate, etc.).
86 if (!::SetWindowPos(
87 mCompositorWnds.mCompositorWnd, nullptr, 0, 0, size.width,
88 size.height,
89 SWP_NOACTIVATE | SWP_NOCOPYBITS | SWP_NOOWNERZORDER | SWP_NOZORDER)) {
90 return;
91 }
92
93 mLastCompositorWndSize = size;
94 }
95
96 // Creates a new instance of FxROutputHandler so that this compositor widget
97 // can send its output to Firefox Reality for Desktop.
RequestFxrOutput()98 void WinCompositorWidget::RequestFxrOutput() {
99 MOZ_ASSERT(mFxrHandler == nullptr);
100
101 mFxrHandler.reset(new FxROutputHandler());
102 }
103
104 } // namespace widget
105 } // namespace mozilla
106