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+/****************************************************************************
+**
+** Copyright (C) 2019 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 "display_software_output_surface.h"
+
+#include "display_frame_sink.h"
+#include "render_widget_host_view_qt_delegate.h"
+#include "type_conversion.h"
+
+#include "base/threading/thread_task_runner_handle.h"
+#include "components/viz/service/display/display.h"
+#include "components/viz/service/display/output_surface_frame.h"
+
+#include <QMutex>
+#include <QPainter>
+#include <QSGImageNode>
+
+namespace QtWebEngineCore {
+
+class DisplaySoftwareOutputSurface::Device final : public viz::SoftwareOutputDevice, public DisplayProducer
+{
+public:
+ ~Device();
+
+ // Called from DisplaySoftwareOutputSurface.
+ void bind(viz::FrameSinkId frameSinkId);
+
+ // Overridden from viz::SoftwareOutputDevice.
+ void Resize(const gfx::Size &sizeInPixels, float devicePixelRatio) override;
+ void OnSwapBuffers(base::OnceClosure swapCompletionCallback) override;
+
+ // Overridden from DisplayProducer.
+ QSGNode *updatePaintNode(QSGNode *oldNode, RenderWidgetHostViewQtDelegate *delegate) override;
+
+private:
+ mutable QMutex m_mutex;
+ scoped_refptr<DisplayFrameSink> m_sink;
+ float m_devicePixelRatio = 1.0;
+ scoped_refptr<base::SingleThreadTaskRunner> m_taskRunner;
+ base::OnceClosure m_swapCompletionCallback;
+ QImage m_image;
+ float m_imageDevicePixelRatio = 1.0;
+};
+
+DisplaySoftwareOutputSurface::Device::~Device()
+{
+ if (m_sink)
+ m_sink->disconnect(this);
+}
+
+void DisplaySoftwareOutputSurface::Device::bind(viz::FrameSinkId frameSinkId)
+{
+ m_sink = DisplayFrameSink::findOrCreate(frameSinkId);
+ m_sink->connect(this);
+}
+
+void DisplaySoftwareOutputSurface::Device::Resize(const gfx::Size &sizeInPixels, float devicePixelRatio)
+{
+ if (viewport_pixel_size_ == sizeInPixels && m_devicePixelRatio == devicePixelRatio)
+ return;
+ m_devicePixelRatio = devicePixelRatio;
+ viewport_pixel_size_ = sizeInPixels;
+ surface_ = SkSurface::MakeRaster(SkImageInfo::MakeN32Premul(sizeInPixels.width(), sizeInPixels.height()));
+}
+
+void DisplaySoftwareOutputSurface::Device::OnSwapBuffers(base::OnceClosure swapCompletionCallback)
+{
+ QMutexLocker locker(&m_mutex);
+ m_taskRunner = base::ThreadTaskRunnerHandle::Get();
+ m_swapCompletionCallback = std::move(swapCompletionCallback);
+ m_sink->scheduleUpdate();
+}
+
+inline QImage::Format imageFormat(SkColorType colorType)
+{
+ switch (colorType) {
+ case kBGRA_8888_SkColorType:
+ return QImage::Format_ARGB32_Premultiplied;
+ case kRGBA_8888_SkColorType:
+ return QImage::Format_RGBA8888_Premultiplied;
+ default:
+ Q_UNREACHABLE();
+ return QImage::Format_ARGB32_Premultiplied;
+ }
+}
+
+QSGNode *DisplaySoftwareOutputSurface::Device::updatePaintNode(
+ QSGNode *oldNode, RenderWidgetHostViewQtDelegate *delegate)
+{
+ QMutexLocker locker(&m_mutex);
+
+ // Delete old node to make sure refcount of m_image is at most 1.
+ delete oldNode;
+ QSGImageNode *node = delegate->createImageNode();
+
+ if (m_swapCompletionCallback) {
+ SkPixmap skPixmap;
+ surface_->peekPixels(&skPixmap);
+ QImage image(reinterpret_cast<const uchar *>(skPixmap.addr()),
+ viewport_pixel_size_.width(), viewport_pixel_size_.height(),
+ skPixmap.rowBytes(), imageFormat(skPixmap.colorType()));
+ if (m_image.size() == image.size()) {
+ QRect damageRect = toQt(damage_rect_);
+ QPainter(&m_image).drawImage(damageRect, image, damageRect);
+ } else {
+ m_image = image;
+ m_image.detach();
+ }
+ m_imageDevicePixelRatio = m_devicePixelRatio;
+ m_taskRunner->PostTask(FROM_HERE, std::move(m_swapCompletionCallback));
+ m_taskRunner.reset();
+ }
+
+ QSizeF sizeInDips = QSizeF(m_image.size()) / m_imageDevicePixelRatio;
+ node->setRect(QRectF(QPointF(0, 0), sizeInDips));
+ node->setOwnsTexture(true);
+ node->setTexture(delegate->createTextureFromImage(m_image));
+
+ return node;
+}
+
+DisplaySoftwareOutputSurface::DisplaySoftwareOutputSurface(viz::UpdateVSyncParametersCallback callback)
+ : SoftwareOutputSurface(std::make_unique<Device>(), std::move(callback))
+{}
+
+DisplaySoftwareOutputSurface::~DisplaySoftwareOutputSurface() {}
+
+// Called from viz::Display::Initialize.
+void DisplaySoftwareOutputSurface::BindToClient(viz::OutputSurfaceClient *client)
+{
+ auto display = static_cast<viz::Display *>(client);
+ auto device = static_cast<Device *>(software_device());
+ device->bind(display->frame_sink_id());
+ SoftwareOutputSurface::BindToClient(client);
+}
+
+} // namespace QtWebEngineCore