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author | Mike Krus <mike.krus@kdab.com> | 2020-01-22 21:35:32 +0000 |
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committer | Mike Krus <mike.krus@kdab.com> | 2020-02-27 06:29:57 +0000 |
commit | 17706144e9dc6c2dfde580b7821f18c5f6924682 (patch) | |
tree | 5f77929db358607fe63a1d438b7a746a6966cbfb /src/core/geometry/qabstractfunctor.h | |
parent | 7f625e93620b313466d0223e911c0c3a5b492617 (diff) |
Geometry refactoring
Move QBuffer, QAttribute, QGeometry to Qt3DCore.
Change-Id: I59dfd091eefadcada93350b3aba955f40b304385
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>
Diffstat (limited to 'src/core/geometry/qabstractfunctor.h')
-rw-r--r-- | src/core/geometry/qabstractfunctor.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/src/core/geometry/qabstractfunctor.h b/src/core/geometry/qabstractfunctor.h new file mode 100644 index 000000000..9bd6e670b --- /dev/null +++ b/src/core/geometry/qabstractfunctor.h @@ -0,0 +1,107 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB). +** Contact: https://www.qt.io/licensing/ +** +** 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 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 Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or 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.GPL2 and 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-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QT3DCORE_QABSTRACTFUNCTOR_H +#define QT3DCORE_QABSTRACTFUNCTOR_H + +#include <Qt3DCore/qt3dcore_global.h> + +QT_BEGIN_NAMESPACE + +namespace Qt3DCore { + +// This will generate a unique id() function per type +// <=> 1 unique function address per type +template<class T> +struct FunctorType +{ + static qintptr id() + { + // The MSVC linker can under some cases optimize all the template + // functions into a single function. The code below is there to ensure + // that the linker won't collapse all these distincts functions into one + static T *t = nullptr; + return reinterpret_cast<qintptr>(t); + } +}; + +template<class T> +qintptr functorTypeId() +{ + return reinterpret_cast<qintptr>(&FunctorType<T>::id); +} + +#define QT3D_FUNCTOR(Class) \ + qintptr id() const override { \ + return Qt3DCore::functorTypeId<Class>(); \ + } + + +class Q_3DCORESHARED_EXPORT QAbstractFunctor +{ +public: + QAbstractFunctor() = default; + virtual ~QAbstractFunctor(); + virtual qintptr id() const = 0; + + // TODO: Remove when moving a copy of this to Qt3DCore + template<class T> + const T *functor_cast(const QAbstractFunctor *other) const + { + if (other->id() == functorTypeId<T>()) + return static_cast<const T *>(other); + return nullptr; + } +private: + Q_DISABLE_COPY(QAbstractFunctor) +}; + +template<class T> +const T *functor_cast(const QAbstractFunctor *other) +{ + if (other->id() == functorTypeId<T>()) + return static_cast<const T *>(other); + return nullptr; +} + +} // Qt3DCore + +QT_END_NAMESPACE + +#endif // QT3DCORE_QABSTRACTFUNCTOR_H |