Fixed WaylandSurfaceItem for when paint enabled is false.

This broke in change c5163c53337b72e0c28ae. Even when paint enabled is
false meaning we don't create a paint node, we want to update the
QSGTexture and the texture provider, so that the WaylandSurfaceItem can
function as a shader effect source.

Change-Id: I8d40c774f8a28240902d2d9919aee8645db9dbe7
Reviewed-by: Paul Olav Tvete <paul.tvete@nokia.com>

2 files changed, 15 insertions, 4 deletions

diff --git a/src/compositor/compositor_api/waylandsurfaceitem.cpp b/src/compositor/compositor_api/waylandsurfaceitem.cpp
index aff24cd54..7a192448c 100644
--- a/src/compositor/compositor_api/waylandsurfaceitem.cpp
+++ b/src/compositor/compositor_api/waylandsurfaceitem.cpp
@@ -311,15 +311,17 @@ public:
         setFlag(UsePreprocess,true);
     }
     void preprocess() {
-        if (m_item->m_damaged)
+        if (m_item->m_damaged) {
+            m_item->updateTexture();
             m_item->updateNodeTexture(this);
+        }
     }
 private:
     WaylandSurfaceItem *m_item;
 };
 
 
-void WaylandSurfaceItem::updateNodeTexture(WaylandSurfaceNode *node)
+void WaylandSurfaceItem::updateTexture()
 {
     if (m_damaged) {
         QSGTexture *oldTexture = m_texture;
@@ -342,15 +344,23 @@ void WaylandSurfaceItem::updateNodeTexture(WaylandSurfaceNode *node)
         m_provider->t = m_texture;
         m_provider->smooth = smooth();
     }
+}
 
+void WaylandSurfaceItem::updateNodeTexture(WaylandSurfaceNode *node)
+{
     node->setTexture(m_texture);
     node->setFiltering(smooth() ? QSGTexture::Linear : QSGTexture::Nearest);
 }
 
-
 QSGNode *WaylandSurfaceItem::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *)
 {
-    if (!m_surface || !m_paintEnabled) {
+    if (!m_surface) {
+        delete oldNode;
+        return 0;
+    }
+
+    updateTexture();
+    if (!m_texture || !m_paintEnabled) {
         delete oldNode;
         return 0;
     }
diff --git a/src/compositor/compositor_api/waylandsurfaceitem.h b/src/compositor/compositor_api/waylandsurfaceitem.h
index b59ce8e53..da07b0066 100644
--- a/src/compositor/compositor_api/waylandsurfaceitem.h
+++ b/src/compositor/compositor_api/waylandsurfaceitem.h
@@ -124,6 +124,7 @@ protected:
 
 private:
     friend class WaylandSurfaceNode;
+    void updateTexture();
     void updateNodeTexture(WaylandSurfaceNode *newNode);
     QPoint toSurface(const QPointF &pos) const;
     void init(WaylandSurface *);