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To make the HeadlessCompositorWidget work under Windows as well as Linux, I had to change the way that I hooked it into the existing CompositorWidget system. Under GTK, the CompositorWidgetInitData and CompositorWidgetDelegate types provided the information needed by the headless compositor widget already (the widget client size). On Windows, however, the definitions of these types differ, and the client size information is simply retrieved from the platform APIs when needed. After this patch, CompositorWidgetDelegate is renamed to PlatformCompositorWidgetDelegate, and a new base class called CompositorWidgetDelegate is added with "AsPlatformSpecificDelegate()" and "AsHeadlessCompositorWidget()" methods. In non-headless mode, widgets use AsPlatformSpecificDelegate() to access the Windows- and GTK-specific delegate APIs. In headless mode, AsHeadlessCompositorWidget() is used to access the singular CompositorWidget implementation for headless. Meanwhile, the CompositorWidgetInitData IPDL type is made into a union which always contains a headless-specific HeadlessCompositorWidgetInitData struct and under GTK and Windows also contains an {X11,Win}CompositorWidgetInitData struct. This also includes a small patch to ensure that the GPU process and hardware-accelerated compositing are always disabled under headless mode. These features weren't activated by default in the Linux environments I tested in, but did end up activating (and then promptly crashing Firefox) when I tested on Windows. MozReview-Commit-ID: CocPoHBDV7H --HG-- extra : rebase_source : 4581fa63aa3a9f32a8dc2672015a35b9be01b20f
38 lines
1.2 KiB
C++
38 lines
1.2 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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#ifndef widget_windows_InProcessCompositorWidgetParent_h
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#define widget_windows_InProcessCompositorWidgetParent_h
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#include "WinCompositorWidget.h"
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class nsWindow;
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namespace mozilla {
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namespace widget {
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// This is the Windows-specific implementation of CompositorWidget. For
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// the most part it only requires an HWND, however it maintains extra state
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// for transparent windows, as well as for synchronizing WM_SETTEXT messages
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// with the compositor.
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class InProcessWinCompositorWidget final : public WinCompositorWidget
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{
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public:
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InProcessWinCompositorWidget(const WinCompositorWidgetInitData& aInitData,
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const layers::CompositorOptions& aOptions,
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nsWindow* aWindow);
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void ObserveVsync(VsyncObserver* aObserver) override;
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nsIWidget* RealWidget() override;
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private:
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nsWindow* mWindow;
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};
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} // namespace widget
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} // namespace mozilla
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#endif // widget_windows_InProcessCompositorWidgetParent_h
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