1 files changed, 86 insertions, 0 deletions
diff --git a/src/core/render/backend/framegraph/framegraphvisitor.cpp b/src/core/render/backend/framegraph/framegraphvisitor.cpp
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+++ b/src/core/render/backend/framegraph/framegraphvisitor.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt3D 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "framegraphvisitor.h"
+
+#include "framegraphnode.h"
+#include "renderer.h"
+
+namespace Qt3D {
+namespace Render {
+
+FrameGraphVisitor::FrameGraphVisitor()
+{
+}
+
+void FrameGraphVisitor::traverse(FrameGraphNode *root, Renderer *renderer)
+{
+    m_renderer = renderer;
+
+    // Kick off the traversal
+    FrameGraphNode *node = root;
+    visit(node);
+}
+
+void FrameGraphVisitor::visit(FrameGraphNode *node)
+{
+    // Apply the state from this node
+    node->apply();
+
+    // Recurse to children (if we have any), otherwise if this is a leaf node,
+    // initiate a rendering from the current camera
+    if (node->childCount()) {
+        for (int i = 0; i < node->childCount(); ++i) {
+            FrameGraphNode *n = node->child(i);
+            visit(n);
+        }
+    } else {
+        // Leaf node. All state is applied and renderer context configured.
+        // Go render something
+        m_renderer->doRender();
+    }
+
+    // Undo the applied state as we exit this node
+    node->revert();
+}
+
+} // namespace Render
+} // namespace Qt3D