StateSetNode: backend framegraph node for QStateSet

Change-Id: I9f7a08b1315d1c2ffce1823edb52a41c33bce656
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

4 files changed, 190 insertions, 3 deletions

diff --git a/src/render/backend/framegraph/framegraph.pri b/src/render/backend/framegraph/framegraph.pri
index 129a73a61..649121c36 100644
--- a/src/render/backend/framegraph/framegraph.pri
+++ b/src/render/backend/framegraph/framegraph.pri
@@ -10,7 +10,8 @@ HEADERS += \
     $$PWD/clearbuffer_p.h \
     $$PWD/sortmethod_p.h \
     $$PWD/sortcriterion_p.h \
-    $$PWD/framegraphsubtreeselector_p.h
+    $$PWD/framegraphsubtreeselector_p.h \
+    $$PWD/statesetnode_p.h
 
 SOURCES += \
     $$PWD/cameraselectornode.cpp \
@@ -24,6 +25,7 @@ SOURCES += \
     $$PWD/clearbuffer.cpp \
     $$PWD/sortmethod.cpp \
     $$PWD/sortcriterion.cpp \
-    $$PWD/framegraphsubtreeselector.cpp
+    $$PWD/framegraphsubtreeselector.cpp \
+    $$PWD/statesetnode.cpp
 
 INCLUDEPATH += $$PWD
diff --git a/src/render/backend/framegraph/framegraphnode_p.h b/src/render/backend/framegraph/framegraphnode_p.h
index a36857ce2..565469f42 100644
--- a/src/render/backend/framegraph/framegraphnode_p.h
+++ b/src/render/backend/framegraph/framegraphnode_p.h
@@ -67,7 +67,8 @@ public:
         Viewport,
         ClearBuffer,
         SortMethod,
-        SubtreeSelector
+        SubtreeSelector,
+        StateSet
     };
     FrameGraphNodeType nodeType() const { return m_nodeType; }
 
diff --git a/src/render/backend/framegraph/statesetnode.cpp b/src/render/backend/framegraph/statesetnode.cpp
new file mode 100644
index 000000000..181e31fa4
--- /dev/null
+++ b/src/render/backend/framegraph/statesetnode.cpp
@@ -0,0 +1,111 @@
+/****************************************************************************
+**
+** 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 "statesetnode_p.h"
+
+#include <Qt3DCore/qscenepropertychange.h>
+#include <Qt3DRenderer/qstateset.h>
+#include <Qt3DRenderer/private/renderstate_p.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3D {
+
+namespace Render {
+
+StateSetNode::StateSetNode()
+    : FrameGraphNode(FrameGraphNode::StateSet)
+{
+}
+
+StateSetNode::~StateSetNode()
+{
+}
+
+void StateSetNode::updateFromPeer(QNode *peer)
+{
+    QStateSet *stateSet = static_cast<QStateSet*>(peer);
+
+    setEnabled(stateSet->isEnabled());
+    Q_FOREACH (QRenderState *renderState, stateSet->renderStates())
+        appendRenderState(renderState->id(), RenderState::getOrCreateBackendState(renderState));
+}
+
+QList<RenderState *> StateSetNode::renderStates() const
+{
+    return m_renderStates.values();
+}
+
+void StateSetNode::sceneChangeEvent(const QSceneChangePtr &e)
+{
+    QScenePropertyChangePtr propertyChange = qSharedPointerCast<QScenePropertyChange>(e);
+    switch (e->type()) {
+    case NodeAdded: {
+        if (propertyChange->propertyName() == QByteArrayLiteral("renderState")) {
+            QNodePtr nodePtr = propertyChange->value().value<QNodePtr>();
+            QRenderState *renderState = static_cast<QRenderState *>(nodePtr.data());
+            appendRenderState(renderState->id(), RenderState::getOrCreateBackendState(renderState));
+        }
+    }
+        break;
+
+    case NodeRemoved: {
+        if (propertyChange->propertyName() == QByteArrayLiteral("renderState"))
+            removeRenderState(propertyChange->value().value<QNodeId>());
+    }
+        break;
+
+    default:
+        break;
+    }
+}
+
+void StateSetNode::appendRenderState(const QNodeId &id, RenderState *renderState)
+{
+    if (!m_renderStates.contains(id))
+        m_renderStates[id] = renderState;
+}
+
+void StateSetNode::removeRenderState(const QNodeId &renderStateId)
+{
+    m_renderStates.remove(renderStateId);
+}
+
+} // Render
+
+} // Qt3D
+
+QT_END_NAMESPACE
diff --git a/src/render/backend/framegraph/statesetnode_p.h b/src/render/backend/framegraph/statesetnode_p.h
new file mode 100644
index 000000000..af6de5e8c
--- /dev/null
+++ b/src/render/backend/framegraph/statesetnode_p.h
@@ -0,0 +1,73 @@
+/****************************************************************************
+**
+** 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QT3D_RENDER_STATESETNODE_H
+#define QT3D_RENDER_STATESETNODE_H
+
+#include <Qt3DRenderer/private/framegraphnode_p.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3D {
+
+namespace Render {
+
+class StateSetNode : public FrameGraphNode
+{
+public:
+    StateSetNode();
+    ~StateSetNode();
+
+    void updateFromPeer(QNode *peer) Q_DECL_OVERRIDE;
+
+    QList<RenderState *> renderStates() const;
+
+protected:
+    void sceneChangeEvent(const QSceneChangePtr &e) Q_DECL_OVERRIDE;
+
+    void appendRenderState(const QNodeId &id, RenderState *renderState);
+    void removeRenderState(const QNodeId &renderStateId);
+
+    QHash<QNodeId, RenderState *> m_renderStates;
+};
+
+} // Render
+
+} // Qt3D
+
+QT_END_NAMESPACE
+
+#endif // QT3D_RENDER_STATESETNODE_H