Fix crash in editor when using qml stream

The crash occurs due to stack overflow due to recursive subpresentation
initialization in runtime codes. This happens because the qml
subpresentation has the same id as the presentation filename, which is
assigned to default initial id from the presentation filename. When the
layer, which is using the qml subpresentation, is initialized in the
runtime, it gets the uip presentation instead of the qml subpresentation.
The same begins to happen recursively.

Add the ability to change the initial presentation id from the surface
viewer api, which is used to render the subpresentations in the editor so
that it gets valid id instead of the id from filename.

Task-number: QT3DS-3345
Change-Id: I45f3a8ce9b5dc030f120baa1a8aed6c284ea7e3c
Reviewed-by: Jere Tuliniemi <jere.tuliniemi@qt.io>
Reviewed-by: Tomi Korpipää <tomi.korpipaa@qt.io>
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>

3 files changed, 22 insertions, 0 deletions

diff --git a/src/Viewer/studio3d/q3dssurfaceviewer.cpp b/src/Viewer/studio3d/q3dssurfaceviewer.cpp
index f477723b..c64ecbfc 100644
--- a/src/Viewer/studio3d/q3dssurfaceviewer.cpp
+++ b/src/Viewer/studio3d/q3dssurfaceviewer.cpp
@@ -121,6 +121,11 @@ bool Q3DSSurfaceViewer::isRunning() const
     return d_ptr->m_viewerApp != nullptr;
 }
 
+QString Q3DSSurfaceViewer::presentationId() const
+{
+    return d_ptr->m_id;
+}
+
 int Q3DSSurfaceViewer::fboId() const
 {
     return d_ptr->m_fboId;
@@ -146,6 +151,16 @@ Q3DSPresentation *Q3DSSurfaceViewer::presentation() const
     return d_ptr->m_presentation;
 }
 
+void Q3DSSurfaceViewer::setPresentationId(const QString &id)
+{
+    if (d_ptr->m_id != id) {
+        d_ptr->m_id = id;
+        Q_EMIT presentationIdChanged(id);
+        if (d_ptr->m_viewerApp)
+            d_ptr->m_viewerApp->setPresentationId(id);
+    }
+}
+
 Q3DSSurfaceViewerPrivate::Q3DSSurfaceViewerPrivate(Q3DSSurfaceViewer *q)
     : QObject(q)
     , q_ptr(q)
@@ -159,6 +174,7 @@ Q3DSSurfaceViewerPrivate::Q3DSSurfaceViewerPrivate(Q3DSSurfaceViewer *q)
     , m_autoSize(true)
     , m_settings(new Q3DSViewerSettings(this))
     , m_presentation(new Q3DSPresentation(this))
+    , m_id(QStringLiteral("initial"))
 {
     connect(m_presentation, &Q3DSPresentation::sourceChanged,
             this, &Q3DSSurfaceViewerPrivate::reset);
@@ -362,6 +378,7 @@ bool Q3DSSurfaceViewerPrivate::initializeRuntime()
         return false;
     }
 
+    m_viewerApp->setPresentationId(m_id);
     m_settings->d_ptr->setViewerApp(m_viewerApp);
     m_presentation->d_ptr->setViewerApp(m_viewerApp);
 
diff --git a/src/Viewer/studio3d/q3dssurfaceviewer.h b/src/Viewer/studio3d/q3dssurfaceviewer.h
index 80c6692d..fc99ccaf 100644
--- a/src/Viewer/studio3d/q3dssurfaceviewer.h
+++ b/src/Viewer/studio3d/q3dssurfaceviewer.h
@@ -53,6 +53,7 @@ class Q_STUDIO3D_EXPORT Q3DSSurfaceViewer : public QObject
     Q_PROPERTY(bool autoSize READ autoSize WRITE setAutoSize NOTIFY autoSizeChanged)
     Q_PROPERTY(int updateInterval READ updateInterval WRITE setUpdateInterval NOTIFY updateIntervalChanged)
     Q_PROPERTY(bool running READ isRunning NOTIFY runningChanged)
+    Q_PROPERTY(QString presentationId READ presentationId WRITE setPresentationId NOTIFY presentationIdChanged)
 
 public:
     explicit Q3DSSurfaceViewer(QObject *parent = nullptr);
@@ -67,6 +68,7 @@ public:
     bool autoSize() const;
     int updateInterval() const;
     bool isRunning() const;
+    QString presentationId() const;
 
     int fboId() const;
     QSurface *surface() const;
@@ -82,6 +84,7 @@ public Q_SLOTS:
     void update();
     void shutdown();
     void reset();
+    void setPresentationId(const QString &id);
 
 Q_SIGNALS:
     void sizeChanged(const QSize &size);
@@ -89,6 +92,7 @@ Q_SIGNALS:
     void updateIntervalChanged(bool autoUpdate);
     void runningChanged(bool initialized);
     void frameUpdated();
+    void presentationIdChanged(const QString &id);
 
 private:
     Q_DISABLE_COPY(Q3DSSurfaceViewer)
diff --git a/src/Viewer/studio3d/q3dssurfaceviewer_p.h b/src/Viewer/studio3d/q3dssurfaceviewer_p.h
index f82e4ba3..a668513e 100644
--- a/src/Viewer/studio3d/q3dssurfaceviewer_p.h
+++ b/src/Viewer/studio3d/q3dssurfaceviewer_p.h
@@ -94,6 +94,7 @@ private:
     bool m_autoSize;
     Q3DSViewerSettings *m_settings;
     Q3DSPresentation *m_presentation;
+    QString m_id;
 };
 
 QT_END_NAMESPACE