Buffer: mark as dirty even if empty on firstTime

We otherwise assert in the case we create an empty buffer
that is empty but referenced by Attributes.
This is still a valid case as buffer data can be set later
on.

Change-Id: Ida198f5815f6cbb488b6b27436c4238146c3ae39
Reviewed-by: Mike Krus <mike.krus@kdab.com>

2 files changed, 4 insertions, 2 deletions

diff --git a/src/render/geometry/buffer.cpp b/src/render/geometry/buffer.cpp
index 998db3640..0ce81efc1 100644
--- a/src/render/geometry/buffer.cpp
+++ b/src/render/geometry/buffer.cpp
@@ -130,8 +130,10 @@ void Buffer::syncFromFrontEnd(const QNode *frontEnd, bool firstTime)
     if (!node)
         return;
 
-    if (firstTime && m_manager != nullptr)
+    if (firstTime && m_manager != nullptr) {
         m_manager->addBufferReference(peerId());
+        m_bufferDirty = true;
+    }
 
     m_syncData = node->isSyncData();
     m_access = node->accessType();
diff --git a/src/render/geometry/qbuffer.cpp b/src/render/geometry/qbuffer.cpp
index f27005f2b..d27da25c7 100644
--- a/src/render/geometry/qbuffer.cpp
+++ b/src/render/geometry/qbuffer.cpp
@@ -329,7 +329,7 @@ void QBuffer::setData(const QByteArray &bytes)
     Q_D(QBuffer);
     if (bytes != d->m_data) {
         d->m_data = bytes;
-        Qt3DCore::QNodePrivate::get(this)->update();
+        d->update();
         emit dataChanged(bytes);
     }
 }