/****************************************************************************
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** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
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****************************************************************************/

#ifndef QT3DRENDER_RENDER_UNIFORMBUFFER_P_H
#define QT3DRENDER_RENDER_UNIFORMBUFFER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of other Qt classes.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

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

QT_BEGIN_NAMESPACE

namespace Qt3DRender {

namespace Render {

class GraphicsContext;

typedef QPair<Qt3DCore::QNodeId, Qt3DCore::QNodeId> ShaderDataShaderUboKey;

class UniformBuffer
{
public:
    UniformBuffer();

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

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

private:
    GLuint m_bufferId;
    bool m_isCreated;
    bool m_bound;
};

} // namespace Render

} // namespace Qt3DRender

QT_END_NAMESPACE

#endif // QT3DRENDER_RENDER_UNIFORMBUFFER_P_H
