Software Adaptation: Invalidate on dpr change

We need to repaint everything on devicePixelRatio change,
like we do on size change.

Task-number: QTBUG-66810
Change-Id: I6b2c2ae92335a0aca731a4b0e7621cf7d08881e3
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
 

1 files changed, 4 insertions, 3 deletions

diff --git a/src/quick/scenegraph/adaptations/software/qsgabstractsoftwarerenderer.cpp b/src/quick/scenegraph/adaptations/software/qsgabstractsoftwarerenderer.cpp
index 2e5fdbbe6b..af3b901af4 100644
--- a/src/quick/scenegraph/adaptations/software/qsgabstractsoftwarerenderer.cpp
+++ b/src/quick/scenegraph/adaptations/software/qsgabstractsoftwarerenderer.cpp
@@ -238,12 +238,13 @@ void QSGAbstractSoftwareRenderer::setBackgroundColor(const QColor &color)
     renderableNode(m_background)->markMaterialDirty();
 }
 
-void QSGAbstractSoftwareRenderer::setBackgroundRect(const QRect &rect)
+void QSGAbstractSoftwareRenderer::setBackgroundRect(const QRect &rect, qreal devicePixelRatio)
 {
-    if (m_background->rect().toRect() == rect)
+    if (m_background->rect().toRect() == rect && m_devicePixelRatio == devicePixelRatio)
         return;
     m_background->setRect(rect);
-    renderableNode(m_background)->markGeometryDirty();
+    m_devicePixelRatio = devicePixelRatio;
+        renderableNode(m_background)->markGeometryDirty();
     // Invalidate the whole scene when the background is resized
     markDirty();
 }