/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: http://www.qt-project.org/legal
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** This file is part of the Qt3D module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL3$
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** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
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** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
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****************************************************************************/

#ifndef QT3D_RENDER_UNIFORMBUFFER_P_H
#define QT3D_RENDER_UNIFORMBUFFER_P_H

#include <QOpenGLContext>
#include <Qt3DCore/qnodeid.h>

QT_BEGIN_NAMESPACE

namespace Qt3D {

namespace Render {

class QGraphicsContext;

typedef QPair<QNodeId, QNodeId> ShaderDataShaderUboKey;

class UniformBuffer
{
public:
    UniformBuffer();

    void bind(QGraphicsContext *ctx);
    void create(QGraphicsContext *ctx);
    void destroy(QGraphicsContext *ctx);
    void allocate(QGraphicsContext *ctx, uint size, bool dynamic = true);
    void update(QGraphicsContext *ctx, const void *data, uint size, int offset = 0);
    void bindToUniformBlock(QGraphicsContext *ctx, int bindingPoint);

    inline GLuint bufferId() const { return m_bufferId; }
    inline bool isCreated() const { return m_isCreated; }

private:
    GLuint m_bufferId;
    bool m_isCreated;
};

} // Render

} // Qt3D

QT_END_NAMESPACE

#endif // QT3D_RENDER_UNIFORMBUFFER_P_H
