Add QDispatchCompute framegraph node

Will be used to dispatch a compute job if the renderer
is compatible with compute shaders (OpenG 4.3)

Change-Id: I7846d3b58d6aed06276aa34e841245ce1154fdd8
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

3 files changed, 216 insertions, 2 deletions

diff --git a/src/render/framegraph/framegraph.pri b/src/render/framegraph/framegraph.pri
index b40b68932..c69da622c 100644
--- a/src/render/framegraph/framegraph.pri
+++ b/src/render/framegraph/framegraph.pri
@@ -46,7 +46,8 @@ HEADERS += \
     $$PWD/frustumculling_p.h \
     $$PWD/qlighting.h \
     $$PWD/qlighting_p.h \
-    $$PWD/lighting_p.h
+    $$PWD/lighting_p.h \
+    $$PWD/qdispatchcompute.h
 
 SOURCES += \
     $$PWD/cameraselectornode.cpp \
@@ -80,4 +81,5 @@ SOURCES += \
     $$PWD/qfrustumculling.cpp \
     $$PWD/frustumculling.cpp \
     $$PWD/qlighting.cpp \
-    $$PWD/lighting.cpp
+    $$PWD/lighting.cpp \
+    $$PWD/qdispatchcompute.cpp
diff --git a/src/render/framegraph/qdispatchcompute.cpp b/src/render/framegraph/qdispatchcompute.cpp
new file mode 100644
index 000000000..8a9ea3fce
--- /dev/null
+++ b/src/render/framegraph/qdispatchcompute.cpp
@@ -0,0 +1,127 @@
+/****************************************************************************
+**
+** 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 "qdispatchcompute.h"
+#include <Qt3DRender/private/qframegraphnode_p.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DRender {
+
+class QDispatchComputePrivate : public QFrameGraphNodePrivate
+{
+public:
+    QDispatchComputePrivate()
+        : QFrameGraphNodePrivate()
+        , m_workGroupX(1)
+        , m_workGroupY(1)
+        , m_workGroupZ(1)
+    {}
+
+    int m_workGroupX;
+    int m_workGroupY;
+    int m_workGroupZ;
+};
+
+QDispatchCompute::QDispatchCompute(Qt3DCore::QNode *parent)
+    : QFrameGraphNode(*new QDispatchComputePrivate(), parent)
+{
+}
+
+QDispatchCompute::~QDispatchCompute()
+{
+    QFrameGraphNode::cleanup();
+}
+
+int QDispatchCompute::workGroupX() const
+{
+    Q_D(const QDispatchCompute);
+    return d->m_workGroupX;
+}
+
+int QDispatchCompute::workGroupY() const
+{
+    Q_D(const QDispatchCompute);
+    return d->m_workGroupY;
+}
+
+int QDispatchCompute::workGroupZ() const
+{
+    Q_D(const QDispatchCompute);
+    return d->m_workGroupZ;
+}
+
+void QDispatchCompute::setWorkGroupX(int workGroupX)
+{
+    Q_D(QDispatchCompute);
+    if (d->m_workGroupX != workGroupX) {
+        d->m_workGroupX = workGroupX;
+        emit workGroupXChanged();
+    }
+}
+
+void QDispatchCompute::setWorkGroupY(int workGroupY)
+{
+    Q_D(QDispatchCompute);
+    if (d->m_workGroupY != workGroupY) {
+        d->m_workGroupY = workGroupY;
+        emit workGroupYChanged();
+    }
+}
+
+void QDispatchCompute::setWorkGroupZ(int workGroupZ)
+{
+    Q_D(QDispatchCompute);
+    if (d->m_workGroupZ != workGroupZ) {
+        d->m_workGroupZ = workGroupZ;
+        emit workGroupZChanged();
+    }
+
+}
+
+void QDispatchCompute::copy(const Qt3DCore::QNode *ref)
+{
+    QFrameGraphNode::copy(ref);
+    const QDispatchCompute *dispatch = static_cast<const QDispatchCompute *>(ref);
+    d_func()->m_workGroupX = dispatch->workGroupX();
+    d_func()->m_workGroupY = dispatch->workGroupY();
+    d_func()->m_workGroupZ = dispatch->workGroupZ();
+}
+
+} // Qt3DRender
+
+QT_END_NAMESPACE
+
diff --git a/src/render/framegraph/qdispatchcompute.h b/src/render/framegraph/qdispatchcompute.h
new file mode 100644
index 000000000..dffe8000c
--- /dev/null
+++ b/src/render/framegraph/qdispatchcompute.h
@@ -0,0 +1,85 @@
+/****************************************************************************
+**
+** 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 QT3DRENDER_QDISPATCHCOMPUTE_H
+#define QT3DRENDER_QDISPATCHCOMPUTE_H
+
+#include <Qt3DRender/qt3drender_global.h>
+#include <Qt3DRender/qframegraphnode.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3DRender {
+
+class QDispatchComputePrivate;
+
+class QT3DRENDERSHARED_EXPORT QDispatchCompute : public QFrameGraphNode
+{
+    Q_OBJECT
+    Q_PROPERTY(int workGroupX READ workGroupX WRITE setWorkGroupX NOTIFY workGroupXChanged)
+    Q_PROPERTY(int workGroupY READ workGroupY WRITE setWorkGroupY NOTIFY workGroupYChanged)
+    Q_PROPERTY(int workGroupZ READ workGroupZ WRITE setWorkGroupZ NOTIFY workGroupZChanged)
+public:
+    explicit QDispatchCompute(Qt3DCore::QNode *parent = Q_NULLPTR);
+    ~QDispatchCompute();
+
+    int workGroupX() const;
+    int workGroupY() const;
+    int workGroupZ() const;
+
+    void setWorkGroupX(int workGroupX);
+    void setWorkGroupY(int workGroupY);
+    void setWorkGroupZ(int workGroupZ);
+
+Q_SIGNALS:
+    void workGroupXChanged();
+    void workGroupYChanged();
+    void workGroupZChanged();
+
+    // QNode interface
+protected:
+    void copy(const Qt3DCore::QNode *ref) Q_DECL_OVERRIDE;
+
+private:
+    QT3D_CLONEABLE(QDispatchCompute)
+    Q_DECLARE_PRIVATE(QDispatchCompute)
+};
+
+} // Qt3DRender
+
+QT_END_NAMESPACE
+
+#endif // QT3DRENDER_QDISPATCHCOMPUTE_H