qml: Mark material dirty when texture buffer is updated

Qt might not redraw the scene otherwise.

https://bugzilla.gnome.org/show_bug.cgi?id=758286

diff --git a/ext/qt/qtitem.cc b/ext/qt/qtitem.cc
index ca8e535..9dc058a 100644 (file)
--- a/ext/qt/qtitem.cc
+++ b/ext/qt/qtitem.cc
@@ -211,6 +211,7 @@ QtGLVideoItem::updatePaintNode(QSGNode * oldNode,
   tex = static_cast<GstQSGTexture *> (texNode->texture());
   tex->setCaps (this->priv->caps);
   tex->setBuffer (this->priv->buffer);
+  texNode->markDirty(QSGNode::DirtyMaterial);
 
   if (this->priv->force_aspect_ratio) {
     src.w = this->priv->display_width;