RenderTarget backend class

Change-Id: I914267b6efb9e99976172a795be5d2f17b2b3230
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

1 files changed, 122 insertions, 0 deletions

diff --git a/src/render/backend/rendertarget.cpp b/src/render/backend/rendertarget.cpp
new file mode 100644
index 000000000..dca2e00b0
--- /dev/null
+++ b/src/render/backend/rendertarget.cpp
@@ -0,0 +1,122 @@
+/****************************************************************************
+**
+** 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 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 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <Qt3DRenderer/private/rendertarget_p.h>
+#include <Qt3DCore/qchangearbiter.h>
+#include <Qt3DCore/qaspectmanager.h>
+#include <Qt3DCore/qscenepropertychange.h>
+#include <Qt3DRenderer/qrendertarget.h>
+#include <Qt3DRenderer/qrenderattachment.h>
+#include <Qt3DRenderer/private/renderer_p.h>
+#include <Qt3DRenderer/rendereraspect.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace Qt3D {
+
+namespace Render {
+
+RenderTarget::RenderTarget()
+    : m_renderer(Q_NULLPTR)
+{
+}
+
+void RenderTarget::setPeer(QRenderTarget *peer)
+{
+    QUuid peerUuid;
+
+    if (peer != Q_NULLPTR)
+        peerUuid = peer->uuid();
+    if (peerUuid != m_renderTargetUuid) {
+        QChangeArbiter *arbiter = m_renderer->rendererAspect()->aspectManager()->changeArbiter();
+        if (!m_renderTargetUuid.isNull()) {
+            arbiter->unregisterObserver(this, m_renderTargetUuid);
+            m_renderAttachments.clear();
+        }
+        m_renderTargetUuid = peerUuid;
+        if (!m_renderTargetUuid.isNull()) {
+            arbiter->registerObserver(this, m_renderTargetUuid, NodeAdded|NodeRemoved|ComponentUpdated);
+            Q_FOREACH (QRenderAttachment *att, peer->attachments())
+                appendRenderAttachment(att);
+        }
+    }
+}
+
+void RenderTarget::setRenderer(Renderer *renderer)
+{
+    m_renderer = renderer;
+}
+
+void RenderTarget::appendRenderAttachment(QRenderAttachment *attachment)
+{
+    if (!m_renderAttachments.contains(attachment->uuid()))
+        m_renderAttachments.append(attachment->uuid());
+}
+
+void RenderTarget::removeRenderAttachment(const QUuid &attachmentId)
+{
+    m_renderAttachments.removeOne(attachmentId);
+}
+
+QList<QUuid> RenderTarget::renderAttachments() const
+{
+    return m_renderAttachments;
+}
+
+QUuid RenderTarget::renderTargetUuid() const
+{
+    return m_renderTargetUuid;
+}
+
+void RenderTarget::sceneChangeEvent(const QSceneChangePtr &e)
+{
+    QScenePropertyChangePtr propertyChange = qSharedPointerCast<QScenePropertyChange>(e);
+    if (e->type() == NodeAdded && propertyChange->propertyName() == QByteArrayLiteral("attachment"))
+        appendRenderAttachment(propertyChange->value().value<QRenderAttachment *>());
+    else if (e->type() == NodeRemoved && propertyChange->propertyName() == QByteArrayLiteral("attachment"))
+        removeRenderAttachment(propertyChange->value().value<QRenderAttachment *>()->uuid());
+}
+
+} // Render
+
+} // Qt3D
+
+QT_END_NAMESPACE