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/****************************************************************************
**
** Copyright (C) 2008-2012 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#pragma once
#ifndef QT3DS_RENDER_TAGGED_POINTER_H
#define QT3DS_RENDER_TAGGED_POINTER_H
#include "Qt3DSRender.h"
#include "foundation/StringTable.h"
namespace qt3ds {
namespace render {
// User's will need to define specialize this struct in order
// to de-tag a pointer.
template <typename TDataType>
struct SPointerTag
{
/* Expected API for runtime RTTI
static CRegisteredString GetTag() { return g_dtype_specific_string; }
*/
};
// A pointer tagged with an identifier so we can have generic
// user data that is still somewhat typesafe.
struct STaggedPointer
{
void *m_UserData;
QT3DSU32 m_Tag;
STaggedPointer()
: m_UserData(NULL)
, m_Tag(0)
{
}
STaggedPointer(void *inUserData, QT3DSU32 inTag)
: m_UserData(inUserData)
, m_Tag(inTag)
{
}
template <typename TDataType>
STaggedPointer(TDataType *inType)
: m_UserData(reinterpret_cast<void *>(inType))
, m_Tag(SPointerTag<TDataType>::GetTag())
{
}
template <typename TDataType>
TDataType *DynamicCast() const
{
if (m_Tag == SPointerTag<TDataType>::GetTag())
return reinterpret_cast<TDataType *>(m_UserData);
return NULL;
}
};
}
}
#endif
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