Make the OpenGL renderer a plugin

By default the QRenderAspect will try to load this plugin

Change-Id: Ie55e207fb8e6d0b64f717bbb99699eb669eaa3f2
Task-number: QTBUG-61151
Reviewed-by: Mike Krus <mike.krus@kdab.com>

1 files changed, 122 insertions, 0 deletions

diff --git a/src/render/renderstates/renderstateset_p.h b/src/render/renderstates/renderstateset_p.h
new file mode 100644
index 000000000..119f1edca
--- /dev/null
+++ b/src/render/renderstates/renderstateset_p.h
@@ -0,0 +1,122 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
+** Copyright (C) 2016 The Qt Company Ltd and/or its subsidiary(-ies).
+** 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 QT3DRENDER_RENDER_RENDERSTATE_H
+#define QT3DRENDER_RENDER_RENDERSTATE_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 <Qt3DRender/private/genericstate_p.h>
+#include <Qt3DRender/private/renderstates_p.h>
+#include <Qt3DRender/private/statevariant_p.h>
+#include <QVector>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DRender {
+
+class QRenderState;
+
+namespace Render {
+
+class RenderState;
+
+class Q_3DRENDERSHARED_PRIVATE_EXPORT RenderStateSet
+{
+public:
+    RenderStateSet();
+    ~RenderStateSet();
+
+    template<typename GenericState>
+    void addState(const GenericState &state)
+    {
+        addState(StateVariant::fromValue(state));
+    }
+
+    /**
+     * @brief changeCost - metric of cost to change to this state-set from
+     * a candidate previous state-set. This is used to find an optimal
+     * ordering of state-sets when sending draw commands.
+     * @param previousState
+     * @return
+     */
+    int changeCost(RenderStateSet* previousState);
+
+    StateMaskSet stateMask() const;
+    void merge(RenderStateSet *other);
+
+    QVector<StateVariant> states() const { return m_states; }
+
+    bool canAddStateOfType(StateMask type) const;
+
+    /**
+     * @brief contains - check if this set contains a matching piece of state
+     * @param ds
+     * @return
+     */
+    bool contains(const StateVariant &ds) const;
+
+private:
+    bool hasStateOfType(StateMask type) const;
+    bool allowMultipleStatesOfType(StateMask type) const;
+
+private:
+    StateMaskSet m_stateMask;
+    QVector<StateVariant> m_states;
+};
+
+template<>
+Q_3DRENDERSHARED_PRIVATE_EXPORT void RenderStateSet::addState<StateVariant>(const StateVariant &state);
+
+} // namespace Render
+} // namespace Qt3DRender
+
+QT_END_NAMESPACE
+
+#endif // QT3DRENDER_RENDER_RENDERSTATE_H