Turns out QAbstractFunctor is specific to Qt3DRender

Change-Id: Ida4d78d7ccd3c64eeedd38a3cba40ca099a2ecab
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

3 files changed, 144 insertions, 0 deletions

diff --git a/src/render/frontend/qabstractfunctor.cpp b/src/render/frontend/qabstractfunctor.cpp
new file mode 100644
index 000000000..60b7816a0
--- /dev/null
+++ b/src/render/frontend/qabstractfunctor.cpp
@@ -0,0 +1,50 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://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.LGPLv3 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.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 later 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 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qabstractfunctor.h"
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DRender {
+
+QAbstractFunctor::~QAbstractFunctor()
+{
+}
+
+} // Qt3D
+
+QT_END_NAMESPACE
+
diff --git a/src/render/frontend/qabstractfunctor.h b/src/render/frontend/qabstractfunctor.h
new file mode 100644
index 000000000..da96da124
--- /dev/null
+++ b/src/render/frontend/qabstractfunctor.h
@@ -0,0 +1,92 @@
+/****************************************************************************
+**
+** 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.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://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.LGPLv3 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.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 later 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 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QT3DRENDER_QABSTRACTFUNCTOR_H
+#define QT3DRENDER_QABSTRACTFUNCTOR_H
+
+#include <Qt3DRender/qt3drender_global.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DRender {
+
+// 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 = 0;
+        return reinterpret_cast<qintptr>(t);
+    }
+};
+
+template<class T>
+qintptr functorTypeId()
+{
+    return reinterpret_cast<qintptr>(&FunctorType<T>::id);
+}
+
+#define QT3D_FUNCTOR(Class)                     \
+   qintptr id() const Q_DECL_OVERRIDE {         \
+        return Qt3DRender::functorTypeId<Class>();    \
+   }
+
+
+class QT3DRENDERSHARED_EXPORT QAbstractFunctor
+{
+public:
+    virtual ~QAbstractFunctor();
+    virtual qintptr id() const = 0;
+
+    template<class T>
+    const T *functor_cast(const QAbstractFunctor *other) const
+    {
+        if (other->id() == functorTypeId<T>())
+            return static_cast<const T *>(other);
+        return Q_NULLPTR;
+    }
+};
+
+} // Qt3D
+
+QT_END_NAMESPACE
+
+#endif // QT3DRENDER_QABSTRACTFUNCTOR_H
diff --git a/src/render/frontend/render-frontend.pri b/src/render/frontend/render-frontend.pri
index de8f41a68..d20f89a56 100644
--- a/src/render/frontend/render-frontend.pri
+++ b/src/render/frontend/render-frontend.pri
@@ -1,6 +1,7 @@
 INCLUDEPATH += $$PWD
 
 HEADERS += \
+    $$PWD/qabstractfunctor.h \
     $$PWD/qrenderaspect.h \
     $$PWD/qrenderaspect_p.h \
     $$PWD/qitemmodelbuffer.h \
@@ -16,6 +17,7 @@ HEADERS += \
     $$PWD/qboundingvolumedebug.h
 
 SOURCES += \
+    $$PWD/qabstractfunctor.cpp \
     $$PWD/qrenderaspect.cpp \
     $$PWD/qitemmodelbuffer.cpp \
     $$PWD/sphere.cpp \