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Diffstat (limited to 'src/core/compositor.cpp')
| -rw-r--r-- | src/core/compositor.cpp | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/src/core/compositor.cpp b/src/core/compositor.cpp new file mode 100644 index 000000000..20d956ab4 --- /dev/null +++ b/src/core/compositor.cpp @@ -0,0 +1,170 @@ +/**************************************************************************** +** +** 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 |