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// Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
// Copyright (C) 2016 Paul Lemire
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "framegraphvisitor_p.h"
#include "framegraphnode_p.h"
#include "subtreeenabler_p.h"
#include <Qt3DRender/private/abstractrenderer_p.h>
#include <Qt3DRender/private/managers_p.h>
#include <QThreadPool>
QT_BEGIN_NAMESPACE
using namespace Qt3DCore;
namespace Qt3DRender {
namespace Render {
FrameGraphVisitor::FrameGraphVisitor(const FrameGraphManager *manager)
: m_manager(manager)
{
m_leaves.reserve(8);
}
std::vector<FrameGraphNode *> &&FrameGraphVisitor::traverse(FrameGraphNode *root)
{
m_leaves.clear();
m_enablersToDisable.clear();
Q_ASSERT_X(root, Q_FUNC_INFO, "The FrameGraphRoot is null");
// Kick off the traversal
Render::FrameGraphNode *node = root;
if (node == nullptr)
qCritical() << Q_FUNC_INFO << "FrameGraph is null";
visit(node);
return std::move(m_leaves);
}
// intended to be called after traverse
// (returns data that is captured during the traverse)
std::vector<FrameGraphNode *> &&FrameGraphVisitor::takeEnablersToDisable()
{
return std::move(m_enablersToDisable);
}
void FrameGraphVisitor::visit(Render::FrameGraphNode *node)
{
if (node->nodeType() == Render::FrameGraphNode::SubtreeEnabler) {
if (!node->isEnabled())
return;
if (static_cast<SubtreeEnabler*>(node)->enablement() == QSubtreeEnabler::SingleShot) {
node->setEnabled(false);
m_enablersToDisable.push_back(node);
}
}
// Recurse to children (if we have any), otherwise if this is a leaf node,
// initiate a rendering from the current camera
const QList<Qt3DCore::QNodeId> fgChildIds = node->childrenIds();
for (const Qt3DCore::QNodeId &fgChildId : fgChildIds)
visit(m_manager->lookupNode(fgChildId));
// Leaf node - create a RenderView ready to be populated
// TODO: Pass in only framegraph config that has changed from previous
// index RenderViewJob.
if (fgChildIds.empty())
m_leaves.push_back(node);
}
} // namespace Render
} // namespace Qt3DRender
QT_END_NAMESPACE
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