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diff --git a/src/core/render/backend/drawstate.h b/src/core/render/backend/drawstate.h
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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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QT3D_DRAWSTATE_H
+#define QT3D_DRAWSTATE_H
+
+#include <QList>
+#include <QSet>
+
+namespace Qt3D {
+
+class QGraphicsContext;
+
+enum StateMask
+{
+    BlendStateMask          = 1 << 0,
+    StencilWriteStateMask   = 1 << 1,
+    StencilTestStateMask    = 1 << 2,
+    ScissorStateMask        = 1 << 3,
+    DepthTestStateMask      = 1 << 4,
+    DepthWriteStateMask     = 1 << 5,
+    CullFaceStateMask       = 1 << 6,
+    AlphaTestMask           = 1 << 7,
+    FrontFaceStateMask      = 1 << 8
+};
+
+typedef quint64 StateMaskSet;
+
+// winuser.h has a #define called DrawState. Let's get rid of it
+#if defined(DrawState)
+#undef DrawState
+#endif
+
+class DrawState
+{
+public:
+    virtual void apply(QGraphicsContext* gc) const = 0;
+
+    virtual StateMaskSet mask() const = 0;
+
+protected:
+};
+
+class DrawStateSet
+{
+public:
+    DrawStateSet();
+
+    void addState(DrawState* ds);
+
+    /**
+     * @brief changeCost - metric of cost to change to this state-set from
+     * a candidate previous state-set. This is used to find an optimal
+     * ordering of state-sets when sending draw commands.
+     * @param previousState
+     * @return
+     */
+    int changeCost(DrawStateSet* previousState);
+
+    void apply(QGraphicsContext* gc);
+
+    StateMaskSet stateMask() const;
+
+    void resetMasked(StateMaskSet maskOfStatesToReset, QGraphicsContext* gc);
+private:
+    /**
+     * @brief contains - check if this set contains a matching piece of state
+     * @param ds
+     * @return
+     */
+    bool contains(DrawState* ds) const;
+
+    QSet<DrawState*> m_states;
+
+    StateMaskSet m_stateMask;
+
+    DrawStateSet* m_cachedPrevious;
+    QList<DrawState*> m_cachedDeltaStates;
+};
+
+} // namespace Qt3D
+
+#endif // QT3D_DRAWSTATE_H