gecko-dev/widget/gtk/CompositorWidgetChild.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef widget_gtk_CompositorWidgetChild_h
#define widget_gtk_CompositorWidgetChild_h
#include "GtkCompositorWidget.h"
#include "mozilla/widget/PCompositorWidgetChild.h"
#include "mozilla/widget/CompositorWidgetVsyncObserver.h"
namespace mozilla {
namespace widget {
class CompositorWidgetChild final : public PCompositorWidgetChild,
Bug 1373739 - Make headless compositing Windows-compatible, in addition to Linux. r=dvander 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
2017-07-07 03:45:34 +03:00
public PlatformCompositorWidgetDelegate {
public:
CompositorWidgetChild(RefPtr<CompositorVsyncDispatcher> aVsyncDispatcher,
RefPtr<CompositorWidgetVsyncObserver> aVsyncObserver,
const CompositorWidgetInitData&);
~CompositorWidgetChild() override;
bool Initialize();
mozilla::ipc::IPCResult RecvObserveVsync() override;
mozilla::ipc::IPCResult RecvUnobserveVsync() override;
void NotifyClientSizeChanged(const LayoutDeviceIntSize& aClientSize) override;
private:
RefPtr<CompositorVsyncDispatcher> mVsyncDispatcher;
RefPtr<CompositorWidgetVsyncObserver> mVsyncObserver;
};
} // namespace widget
} // namespace mozilla
#endif // widget_gtk_CompositorWidgetChild_h