QRenderTargetSelector: takes list of active drawBuffers

Change-Id: I63ea3ddcd16034b4fb2d75cb8d5a90e7f557fd5e
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>

4 files changed, 44 insertions, 1 deletions

diff --git a/src/render/frontend/framegraph-components/qrendertargetselector.cpp b/src/render/frontend/framegraph-components/qrendertargetselector.cpp
index 644dd4137..b357f713b 100644
--- a/src/render/frontend/framegraph-components/qrendertargetselector.cpp
+++ b/src/render/frontend/framegraph-components/qrendertargetselector.cpp
@@ -88,7 +88,41 @@ QRenderTarget *QRenderTargetSelector::target() const
     return d->m_target;
 }
 
-/*! \internal */
+/*!
+ * \internal
+ * Sets the draw buffers \a buffers to be used. The draw buffers should be
+ * matching the Qt3D::QRenderAttachment::RenderAttachmentType
+ * defined in the attachments of the Qt3D::QRenderTarget associated to the
+ * Qt3D::QRenderTargetSelector instance.
+ *
+ * \note At render time, if no draw buffer has been specified, the renderer will
+ * default to using all the attachments' draw buffers.
+ *
+ */
+void QRenderTargetSelector::setDrawBuffers(const QList<QRenderAttachment::RenderAttachmentType> &buffers)
+{
+    Q_D(QRenderTargetSelector);
+    if (buffers != d->m_drawBuffers) {
+        d->m_drawBuffers = buffers;
+
+        if (d->m_changeArbiter) {
+            QScenePropertyChangePtr change(new QScenePropertyChange(NodeUpdated, QSceneChange::Node, id()));
+            change->setPropertyName("drawBuffers");
+            change->setValue(QVariant::fromValue(d->m_drawBuffers));
+            d->notifyObservers(change);
+        }
+    }
+}
+
+/*!
+ * Returns the list of draw buffers for the current Qt3D::QRenderTargetSelector instance.
+ */
+QList<QRenderAttachment::RenderAttachmentType> QRenderTargetSelector::drawBuffers() const
+{
+    Q_D(const QRenderTargetSelector);
+    return d->m_drawBuffers;
+}
+
 QRenderTargetSelector::QRenderTargetSelector(QRenderTargetSelectorPrivate &dd, QNode *parent)
     : QFrameGraphNode(dd, parent)
 {
diff --git a/src/render/frontend/framegraph-components/qrendertargetselector.h b/src/render/frontend/framegraph-components/qrendertargetselector.h
index b467673bc..f98f05f8f 100644
--- a/src/render/frontend/framegraph-components/qrendertargetselector.h
+++ b/src/render/frontend/framegraph-components/qrendertargetselector.h
@@ -40,6 +40,7 @@
 #include <Qt3DRenderer/qt3drenderer_global.h>
 #include <Qt3DCore/qnode.h>
 #include <Qt3DRenderer/qframegraphnode.h>
+#include <Qt3DRenderer/qrenderattachment.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -58,6 +59,9 @@ public:
     void setTarget(QRenderTarget *target);
     QRenderTarget *target() const;
 
+    void setDrawBuffers(const QList<QRenderAttachment::RenderAttachmentType> &buffers);
+    QList<QRenderAttachment::RenderAttachmentType> drawBuffers() const;
+
 Q_SIGNALS:
     void targetChanged();
 
@@ -74,4 +78,6 @@ private:
 
 QT_END_NAMESPACE
 
+Q_DECLARE_METATYPE(QList<Qt3D::QRenderAttachment::RenderAttachmentType>)
+
 #endif // QT3D_QRENDERTARGETSELECTOR_H
diff --git a/src/render/frontend/framegraph-components/qrendertargetselector_p.h b/src/render/frontend/framegraph-components/qrendertargetselector_p.h
index 195dc6938..8c41de798 100644
--- a/src/render/frontend/framegraph-components/qrendertargetselector_p.h
+++ b/src/render/frontend/framegraph-components/qrendertargetselector_p.h
@@ -53,6 +53,7 @@ public:
 
     Q_DECLARE_PUBLIC(QRenderTargetSelector)
     QRenderTarget *m_target;
+    QList<QRenderAttachment::RenderAttachmentType> m_drawBuffers;
 };
 
 } // Qt3D
diff --git a/src/render/frontend/qrenderattachment.h b/src/render/frontend/qrenderattachment.h
index e27813795..e0ba0ebcc 100644
--- a/src/render/frontend/qrenderattachment.h
+++ b/src/render/frontend/qrenderattachment.h
@@ -132,4 +132,6 @@ private:
 
 QT_END_NAMESPACE
 
+Q_DECLARE_METATYPE(Qt3D::QRenderAttachment::RenderAttachmentType)
+
 #endif // QT3D_QRENDERATTACHMENT_H