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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_gl_output_surface.h"
#include "compositor_resource_fence.h"
#include "render_widget_host_view_qt_delegate.h"
#include "type_conversion.h"
#include <QOpenGLFunctions>
#include <QSGImageNode>
#include <QSGTexture>
namespace QtWebEngineCore {
class DisplayGLOutputSurface::Texture final : public QSGTexture
{
public:
Texture(uint32_t id, QSize sizeInPixels, bool hasAlphaChannel, scoped_refptr<CompositorResourceFence> fence)
: m_id(id)
, m_sizeInPixels(sizeInPixels)
, m_hasAlphaChannel(hasAlphaChannel)
, m_fence(std::move(fence))
{
}
// QSGTexture:
int textureId() const override { return m_id; }
QSize textureSize() const override { return m_sizeInPixels; }
bool hasAlphaChannel() const override { return m_hasAlphaChannel; }
bool hasMipmaps() const override { return false; }
void bind() override
{
if (m_fence) {
m_fence->wait();
m_fence.reset();
}
QOpenGLContext *context = QOpenGLContext::currentContext();
QOpenGLFunctions *funcs = context->functions();
funcs->glBindTexture(GL_TEXTURE_2D, m_id);
}
private:
uint32_t m_id;
QSize m_sizeInPixels;
bool m_hasAlphaChannel;
scoped_refptr<CompositorResourceFence> m_fence;
};
QSGNode *DisplayGLOutputSurface::updatePaintNode(QSGNode *oldNode, RenderWidgetHostViewQtDelegate *delegate)
{
{
QMutexLocker locker(&m_mutex);
if (m_readyToUpdate) {
std::swap(m_middleBuffer, m_frontBuffer);
m_taskRunner->PostTask(
FROM_HERE,
base::BindOnce(&DisplayGLOutputSurface::swapBuffersOnVizThread, base::Unretained(this)));
m_taskRunner.reset();
m_readyToUpdate = false;
}
}
if (!m_frontBuffer)
return oldNode;
auto node = static_cast<QSGImageNode *>(oldNode);
if (!node)
node = delegate->createImageNode();
QSize sizeInPixels = toQt(m_frontBuffer->shape.sizeInPixels);
QSizeF sizeInDips = QSizeF(sizeInPixels) / m_frontBuffer->shape.devicePixelRatio;
QRectF rectInDips(QPointF(0, 0), sizeInDips);
node->setRect(rectInDips);
node->setOwnsTexture(true);
node->setTexture(new Texture(m_frontBuffer->serviceId,
sizeInPixels,
m_frontBuffer->shape.hasAlpha,
m_frontBuffer->fence));
node->setTextureCoordinatesTransform(QSGImageNode::MirrorVertically);
return node;
}
} // namespace QtWebEngineCore
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