RenderAttribute: backend class for QAttribute

Change-Id: I7761533652933f1f11b808ce735b4be4687846ce
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

3 files changed, 249 insertions, 2 deletions

diff --git a/src/render/backend/render-backend.pri b/src/render/backend/render-backend.pri
index fad104e48..20450cb25 100644
--- a/src/render/backend/render-backend.pri
+++ b/src/render/backend/render-backend.pri
@@ -52,7 +52,8 @@ HEADERS += \
     $$PWD/renderparametermapping_p.h \
     $$PWD/rendertextureimage_p.h \
     $$PWD/vsyncframeadvanceservice_p.h \
-    $$PWD/renderbuffer_p.h
+    $$PWD/renderbuffer_p.h \
+    $$PWD/renderattribute_p.h
 
 SOURCES += \
     $$PWD/qrenderaspect.cpp \
@@ -95,4 +96,5 @@ SOURCES += \
     $$PWD/renderparametermapping.cpp \
     $$PWD/rendertextureimage.cpp \
     $$PWD/vsyncframeadvanceservice.cpp \
-    $$PWD/renderbuffer.cpp
+    $$PWD/renderbuffer.cpp \
+    $$PWD/renderattribute.cpp
diff --git a/src/render/backend/renderattribute.cpp b/src/render/backend/renderattribute.cpp
new file mode 100644
index 000000000..a8435c5bc
--- /dev/null
+++ b/src/render/backend/renderattribute.cpp
@@ -0,0 +1,156 @@
+/****************************************************************************
+**
+** 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 "renderattribute_p.h"
+#include <Qt3DCore/qscenepropertychange.h>
+#include <Qt3DRenderer/qbuffer.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3D {
+
+namespace Render {
+
+RenderAttribute::RenderAttribute()
+    : QBackendNode(ReadOnly)
+    , m_type(0)
+    , m_count(0)
+    , m_byteStride(0)
+    , m_byteOffset(0)
+    , m_divisor(0)
+    , m_attributeType(QAbstractAttribute::VertexAttribute)
+    , m_attributeDirty(false)
+{
+}
+
+RenderAttribute::~RenderAttribute()
+{
+}
+
+void RenderAttribute::cleanup()
+{
+    m_type = 0;
+    m_count = 0;
+    m_byteStride = 0;
+    m_byteOffset = 0;
+    m_divisor = 0;
+    m_attributeType = QAbstractAttribute::VertexAttribute;
+    m_bufferId = QNodeId();
+    m_name.clear();
+    m_attributeDirty = false;
+}
+
+void RenderAttribute::updateFromPeer(QNode *peer)
+{
+    QAttribute *attribute = static_cast<QAttribute *>(peer);
+    if (attribute) {
+        m_type = attribute->type();
+        m_count = attribute->count();
+        m_byteOffset = attribute->byteOffset();
+        m_byteStride = attribute->byteStride();
+        m_divisor = attribute->divisor();
+        m_attributeType = attribute->attributeType();
+        m_name = attribute->name();
+        if (attribute->buffer())
+            m_bufferId = attribute->buffer()->id();
+        m_attributeDirty = true;
+    }
+}
+
+void RenderAttribute::sceneChangeEvent(const QSceneChangePtr &e)
+{
+    QScenePropertyChangePtr propertyChange = qSharedPointerCast<QScenePropertyChange>(e);
+    QByteArray propertyName = propertyChange->propertyName();
+
+    switch (e->type()) {
+
+    case NodeUpdated: {
+        if (propertyName == QByteArrayLiteral("name")) {
+            m_name = propertyChange->value().value<QString>();
+            m_attributeDirty = true;
+        } else if (propertyName == QByteArrayLiteral("type")) {
+            m_type = propertyChange->value().value<int>();
+            m_attributeDirty = true;
+        } else if (propertyName == QByteArrayLiteral("count")) {
+            m_count = propertyChange->value().value<uint>();
+            m_attributeDirty = true;
+        } else if (propertyName == QByteArrayLiteral("byteStride")) {
+            m_byteStride = propertyChange->value().value<uint>();
+            m_attributeDirty = true;
+        } else if (propertyName == QByteArrayLiteral("byteOffset")) {
+            m_byteOffset = propertyChange->value().value<uint>();
+            m_attributeDirty = true;
+        } else if (propertyName == QByteArrayLiteral("divisor")) {
+            m_divisor = propertyChange->value().value<uint>();
+            m_attributeDirty = true;
+        } else if (propertyName == QByteArrayLiteral("attributeType")) {
+            m_attributeType = static_cast<QAbstractAttribute::AttributeType>(propertyChange->value().value<int>());
+            m_attributeDirty = true;
+        }
+        break;
+    }
+
+    case NodeAdded: {
+        if (propertyName == QByteArrayLiteral("buffer")) {
+            m_bufferId = propertyChange->value().value<QNodeId>();
+            m_attributeDirty = true;
+        }
+        break;
+    }
+
+    case NodeRemoved: {
+        if (propertyName == QByteArrayLiteral("buffer")) {
+            m_bufferId = QNodeId();
+            m_attributeDirty = true;
+        }
+        break;
+    }
+
+    default:
+        break;
+    }
+}
+
+void RenderAttribute::unsetDirty()
+{
+    m_attributeDirty = false;
+}
+
+} // Render
+
+} // Qt3D
+
+QT_END_NAMESPACE
diff --git a/src/render/backend/renderattribute_p.h b/src/render/backend/renderattribute_p.h
new file mode 100644
index 000000000..0cf19d593
--- /dev/null
+++ b/src/render/backend/renderattribute_p.h
@@ -0,0 +1,89 @@
+/****************************************************************************
+**
+** 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_RENDERATTRIBUTE_H
+#define QT3D_RENDER_RENDERATTRIBUTE_H
+
+#include <Qt3DCore/qbackendnode.h>
+#include <Qt3DRenderer/qattribute.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3D {
+
+namespace Render {
+
+class Q_AUTOTEST_EXPORT RenderAttribute : public QBackendNode
+{
+public:
+    RenderAttribute();
+    ~RenderAttribute();
+
+    void cleanup();
+
+    void updateFromPeer(QNode *peer) Q_DECL_OVERRIDE;
+    void sceneChangeEvent(const QSceneChangePtr &e) Q_DECL_OVERRIDE;
+
+    inline QNodeId bufferId() const { return m_bufferId; }
+    inline QString name() const { return m_name; }
+    inline int type() const { return m_type; }
+    inline uint count() const { return m_count; }
+    inline uint byteStride() const { return m_byteStride; }
+    inline uint byteOffset() const { return m_byteOffset; }
+    inline uint divisor() const { return m_divisor; }
+    inline QAbstractAttribute::AttributeType attributeType() const { return m_attributeType; }
+    inline bool isDirty() const { return m_attributeDirty; }
+    void unsetDirty();
+
+private:
+    QNodeId m_bufferId;
+    QString m_name;
+    int m_type;
+    uint m_count;
+    uint m_byteStride;
+    uint m_byteOffset;
+    uint m_divisor;
+    QAbstractAttribute::AttributeType m_attributeType;
+    bool m_attributeDirty;
+};
+
+} // Render
+
+} // Qt3D
+
+QT_END_NAMESPACE
+
+#endif // QT3D_RENDER_RENDERATTRIBUTE_H