diff --git a/src/common/QskShadowMetrics.cpp b/src/common/QskShadowMetrics.cpp
index 048e761c..7b15cec7 100644
--- a/src/common/QskShadowMetrics.cpp
+++ b/src/common/QskShadowMetrics.cpp
@@ -6,7 +6,7 @@
 #include "QskShadowMetrics.h"
 
 #include <qhashfunctions.h>
-#include <qsize.h>
+#include <qrect.h>
 #include <qvariant.h>
 
 static void qskRegisterShadowMetrics()
@@ -71,6 +71,15 @@ QVariant QskShadowMetrics::interpolate(
     return QVariant::fromValue( from.interpolated( to, progress ) );
 }
 
+QRectF QskShadowMetrics::shadowRect( const QRectF& sourceRect ) const
+{
+    return QRectF(
+        sourceRect.x() + m_offset.x() - m_spreadRadius,
+        sourceRect.y() + m_offset.y() - m_spreadRadius,
+        sourceRect.width() + 2 * m_spreadRadius,
+        sourceRect.height() + 2 * m_spreadRadius );
+}
+
 uint QskShadowMetrics::hash( uint seed ) const noexcept
 {
     uint hash;
diff --git a/src/common/QskShadowMetrics.h b/src/common/QskShadowMetrics.h
index 19953b21..934f5231 100644
--- a/src/common/QskShadowMetrics.h
+++ b/src/common/QskShadowMetrics.h
@@ -46,6 +46,8 @@ class QSK_EXPORT QskShadowMetrics
 
     QskShadowMetrics toAbsolute( const QSizeF& ) const noexcept;
 
+    QRectF shadowRect( const QRectF& sourceRect ) const;
+
     uint hash( uint seed = 0 ) const noexcept;
 
     static QVariant interpolate( const QskShadowMetrics&,