Implement VBO caching of larger geometries

Change-Id: If87b70b191a06448287b47d252a288b441af6302
Reviewed-on: http://codereview.qt.nokia.com/2784
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Yoann Lopes <yoann.lopes@nokia.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/src/declarative/items/qsgtextnode.cpp b/src/declarative/items/qsgtextnode.cpp
index d36db1b6b6..03a558fe3d 100644
--- a/src/declarative/items/qsgtextnode.cpp
+++ b/src/declarative/items/qsgtextnode.cpp
@@ -166,9 +166,20 @@ QSGGlyphNode *QSGTextNode::addGlyphs(const QPointF &position, const QGlyphRun &g
 
     node->update();
 
-    if (node != prevNode)
+    // A new node, add it to the graph.
+    if (node != prevNode) {
         appendChildNode(node);
 
+        /* We flag the geometry as static, but we never call markVertexDataDirty
+           or markIndexDataDirty on them. This is because all text nodes are
+           discarded when a change occurs. If we start appending/removing from
+           existing geometry, then we also need to start marking the geometry as
+           dirty.
+         */
+        node->geometry()->setIndexDataPattern(QSGGeometry::StaticPattern);
+        node->geometry()->setVertexDataPattern(QSGGeometry::StaticPattern);
+    }
+
     return node;
 }