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270ba49604
Bug 1604412 enabled "remote backbuffer" compositing when using non-accelerated layers. However, due to my misunderstanding of how nWindow and compositing handles layered windows, I broke the usecase where a child window is transparent. In this case, it is the top-level anscestor window that has the WS_EX_LAYERED attribute and not the child window. The ancestor is the one that needs to be repainted when a present is requested. Differential Revision: https://phabricator.services.mozilla.com/D63377 --HG-- extra : moz-landing-system : lando
109 lines
3.3 KiB
C++
109 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "CompositorWidgetChild.h"
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#include "mozilla/Unused.h"
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#include "mozilla/widget/CompositorWidgetVsyncObserver.h"
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#include "mozilla/widget/PlatformWidgetTypes.h"
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#include "nsBaseWidget.h"
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#include "VsyncDispatcher.h"
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#include "gfxPlatform.h"
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#include "RemoteBackbuffer.h"
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namespace mozilla {
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namespace widget {
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CompositorWidgetChild::CompositorWidgetChild(
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RefPtr<CompositorVsyncDispatcher> aVsyncDispatcher,
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RefPtr<CompositorWidgetVsyncObserver> aVsyncObserver,
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const CompositorWidgetInitData& aInitData)
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: mVsyncDispatcher(aVsyncDispatcher),
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mVsyncObserver(aVsyncObserver),
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mCompositorWnd(nullptr),
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mWnd(reinterpret_cast<HWND>(
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aInitData.get_WinCompositorWidgetInitData().hWnd())),
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mTransparencyMode(
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aInitData.get_WinCompositorWidgetInitData().transparencyMode()),
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mRemoteBackbufferProvider() {
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MOZ_ASSERT(XRE_IsParentProcess());
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MOZ_ASSERT(!gfxPlatform::IsHeadless());
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MOZ_ASSERT(mWnd && ::IsWindow(mWnd));
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}
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CompositorWidgetChild::~CompositorWidgetChild() {}
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bool CompositorWidgetChild::Initialize() {
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mRemoteBackbufferProvider = std::make_unique<remote_backbuffer::Provider>();
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if (!mRemoteBackbufferProvider->Initialize(mWnd, OtherPid(),
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mTransparencyMode)) {
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return false;
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}
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auto maybeRemoteHandles = mRemoteBackbufferProvider->CreateRemoteHandles();
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if (!maybeRemoteHandles) {
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return false;
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}
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Unused << SendInitialize(*maybeRemoteHandles);
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return true;
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}
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void CompositorWidgetChild::EnterPresentLock() {
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Unused << SendEnterPresentLock();
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}
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void CompositorWidgetChild::LeavePresentLock() {
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Unused << SendLeavePresentLock();
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}
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void CompositorWidgetChild::OnDestroyWindow() {}
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bool CompositorWidgetChild::OnWindowResize(const LayoutDeviceIntSize& aSize) {
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return true;
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}
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void CompositorWidgetChild::OnWindowModeChange(nsSizeMode aSizeMode) {}
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void CompositorWidgetChild::UpdateTransparency(nsTransparencyMode aMode) {
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mTransparencyMode = aMode;
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mRemoteBackbufferProvider->UpdateTransparencyMode(aMode);
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Unused << SendUpdateTransparency(aMode);
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}
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void CompositorWidgetChild::ClearTransparentWindow() {
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Unused << SendClearTransparentWindow();
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}
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mozilla::ipc::IPCResult CompositorWidgetChild::RecvObserveVsync() {
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mVsyncDispatcher->SetCompositorVsyncObserver(mVsyncObserver);
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return IPC_OK();
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}
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mozilla::ipc::IPCResult CompositorWidgetChild::RecvUnobserveVsync() {
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mVsyncDispatcher->SetCompositorVsyncObserver(nullptr);
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return IPC_OK();
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}
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mozilla::ipc::IPCResult CompositorWidgetChild::RecvUpdateCompositorWnd(
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const WindowsHandle& aCompositorWnd, const WindowsHandle& aParentWnd,
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UpdateCompositorWndResolver&& aResolve) {
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HWND parentWnd = reinterpret_cast<HWND>(aParentWnd);
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if (mWnd == parentWnd) {
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mCompositorWnd = reinterpret_cast<HWND>(aCompositorWnd);
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::SetParent(mCompositorWnd, mWnd);
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aResolve(true);
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} else {
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aResolve(false);
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gfxCriticalNote << "Parent winow does not match";
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MOZ_ASSERT_UNREACHABLE("unexpected to happen");
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}
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return IPC_OK();
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}
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} // namespace widget
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} // namespace mozilla
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