added "roundCorner" to shadows passed to kwin. This allows to use mask for...

added "roundCorner" to shadows passed to kwin. This allows to use mask for detached dockwidgets, and still have nice
bevelled corners.
CCBUG: 273848

kstyles/oxygen/oxygenshadowhelper.cpp

@@ -27,6 +27,7 @@
 #include "oxygenshadowhelper.h"
 #include "oxygenshadowhelper.moc"
 #include "oxygenshadowcache.h"
+#include "oxygenstylehelper.h"
 
 #include <KConfig>
 
@@ -51,8 +52,9 @@ namespace Oxygen
     const char* const ShadowHelper::netWMSkipShadowPropertyName( "_KDE_NET_WM_SKIP_SHADOW" );
 
     //_____________________________________________________
-    ShadowHelper::ShadowHelper( QObject* parent, Helper& helper ):
+    ShadowHelper::ShadowHelper( QObject* parent, StyleHelper& helper ):
         QObject( parent ),
+        _helper( helper ),
         _shadowCache( new ShadowCache( helper ) ),
         _size( 0 )
         #ifdef Q_WS_X11
@@ -140,12 +142,19 @@ namespace Oxygen
         // retrieve shadow pixmap
         _size = shadowCache().shadowSize();
 
-        // add transparency
         QPixmap pixmap( shadowCache().pixmap( ShadowCache::Key() ) );
         {
             QPainter painter( &pixmap );
+
+            // add transparency
             painter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
             painter.fillRect( pixmap.rect(), QColor( 0, 0, 0, 150 ) );
+
+            // add round corners
+            const QRect cornerRect( (pixmap.width()-10)/2, (pixmap.height()-10)/2, 10, 10 );
+            painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
+            _helper.roundCorner( QPalette().color( QPalette::Window ) )->render( cornerRect, &painter );
+
         }
 
         // recreate tileset

kstyles/oxygen/oxygenshadowhelper.h

@@ -42,7 +42,7 @@ namespace Oxygen
 
     //! forward declaration
     class ShadowCache;
-    class Helper;
+    class StyleHelper;
 
     //! handle shadow pixmaps passed to window manager via X property
     class ShadowHelper: public QObject
@@ -58,7 +58,7 @@ namespace Oxygen
         static const char* const netWMSkipShadowPropertyName;
 
         //! constructor
-        ShadowHelper( QObject*, Helper& );
+        ShadowHelper( QObject*, StyleHelper& );
 
         //! destructor
         virtual ~ShadowHelper( void );
@@ -123,6 +123,9 @@ namespace Oxygen
 
         private:
 
+        //! helper
+        StyleHelper& _helper;
+
         //! cache
         ShadowCache* _shadowCache;