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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtWebEngine module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "compositor.h"
#include "delegated_frame_node.h"
#include <components/viz/common/resources/returned_resource.h>
#include <content/public/browser/browser_thread.h>
#include <services/viz/public/interfaces/compositing/compositor_frame_sink.mojom.h>
namespace QtWebEngineCore {
Compositor::Compositor()
: m_chromiumCompositorData(new ChromiumCompositorData)
{
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
base::SingleThreadTaskRunner *taskRunner =
content::BrowserThread::GetTaskRunnerForThread(content::BrowserThread::UI).get();
m_beginFrameSource =
std::make_unique<viz::DelayBasedBeginFrameSource>(
std::make_unique<viz::DelayBasedTimeSource>(taskRunner),
viz::BeginFrameSource::kNotRestartableId);
}
Compositor::~Compositor()
{
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
}
void Compositor::setViewDelegate(RenderWidgetHostViewQtDelegate *viewDelegate)
{
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
m_viewDelegate = viewDelegate;
}
void Compositor::setFrameSinkClient(viz::mojom::CompositorFrameSinkClient *frameSinkClient)
{
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
if (m_frameSinkClient == frameSinkClient)
return;
// Accumulated resources belong to the old RendererCompositorFrameSink and
// should not be returned.
//
// TODO(juvaldma): Can there be a pending frame from the old client?
m_resourcesToRelease.clear();
m_frameSinkClient = frameSinkClient;
}
void Compositor::setNeedsBeginFrames(bool needsBeginFrames)
{
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
if (m_needsBeginFrames == needsBeginFrames)
return;
if (needsBeginFrames)
m_beginFrameSource->AddObserver(this);
else
m_beginFrameSource->RemoveObserver(this);
m_needsBeginFrames = needsBeginFrames;
}
void Compositor::submitFrame(viz::CompositorFrame frame)
{
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
DCHECK(!m_havePendingFrame);
m_chromiumCompositorData->frameDevicePixelRatio = frame.metadata.device_scale_factor;
m_chromiumCompositorData->previousFrameData = std::move(m_chromiumCompositorData->frameData);
m_chromiumCompositorData->frameData = std::move(frame);
m_havePendingFrame = true;
// Tell viewDelegate to call updatePaintNode() soon.
m_viewDelegate->update();
}
QSGNode *Compositor::updatePaintNode(QSGNode *oldNode)
{
// DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
//
// This might be called from a Qt Quick render thread, but the UI thread
// will still be blocked for the duration of this call.
DelegatedFrameNode *frameNode = static_cast<DelegatedFrameNode *>(oldNode);
if (!frameNode)
frameNode = new DelegatedFrameNode;
frameNode->commit(m_chromiumCompositorData.data(), &m_resourcesToRelease, m_viewDelegate);
if (m_havePendingFrame) {
m_havePendingFrame = false;
content::BrowserThread::PostTask(
content::BrowserThread::UI, FROM_HERE,
base::BindOnce(&Compositor::notifyFrameCommitted, m_weakPtrFactory.GetWeakPtr()));
}
return frameNode;
}
void Compositor::notifyFrameCommitted()
{
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
m_beginFrameSource->DidFinishFrame(this);
if (m_frameSinkClient)
m_frameSinkClient->DidReceiveCompositorFrameAck(m_resourcesToRelease);
m_resourcesToRelease.clear();
}
bool Compositor::OnBeginFrameDerivedImpl(const viz::BeginFrameArgs &args)
{
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
m_beginFrameSource->OnUpdateVSyncParameters(args.frame_time, args.interval);
if (m_frameSinkClient)
m_frameSinkClient->OnBeginFrame(args);
return true;
}
void Compositor::OnBeginFrameSourcePausedChanged(bool)
{
// Ignored for now. If the begin frame source is paused, the renderer
// doesn't need to be informed about it and will just not receive more
// begin frames.
}
} // namespace QtWebEngineCore
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