Support opt-in QSGNode descriptions without breaking binary compat.

This define is quite useful for debugging scene graph internals, but
it is disabled by default to conserve memory.

For clarity, I renamed the define to QSG_RUNTIME_DESCRIPTION.

Change-Id: Ie5ff44d67af38adc65d0d09255d8533dc7a33bff
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/quick/scenegraph/coreapi/qsgnode_p.h b/src/quick/scenegraph/coreapi/qsgnode_p.h
index b0d8088af2..0b9bc67d1e 100644
--- a/src/quick/scenegraph/coreapi/qsgnode_p.h
+++ b/src/quick/scenegraph/coreapi/qsgnode_p.h
@@ -44,6 +44,8 @@
 
 #include <qglobal.h>
 
+#include "qsgnode.h"
+
 QT_BEGIN_NAMESPACE
 
 class QSGNodePrivate
@@ -51,6 +53,16 @@ class QSGNodePrivate
 public:
     QSGNodePrivate() {}
     virtual ~QSGNodePrivate() {}
+
+#ifdef QSG_RUNTIME_DESCRIPTION
+    static void setDescription(QSGNode *node, const QString &description) {
+        node->d_ptr->descr= description;
+    }
+    static QString description(const QSGNode *node) {
+        return node->d_ptr->descr;
+    }
+    QString descr;
+#endif
 };