fdo#74702 Move ImplInitClipRegion Window code out of OutputDevice

Window instances need to handle overlapped window clipping,
VirtualDevice and Printer do not have to worry about this. This code
should be kept in the class that handles it, so I'm seperating it out.

Change-Id: Ie7df90c983f7a858b563d4f892ceb64d575c0319

1 files changed, 33 insertions, 0 deletions

diff --git a/vcl/source/window/window.cxx b/vcl/source/window/window.cxx
index cf53f2ae3bff..9fe3df56c1b7 100644
--- a/vcl/source/window/window.cxx
+++ b/vcl/source/window/window.cxx
@@ -406,6 +406,39 @@ bool Window::AcquireGraphics() const
     return mpGraphics ? true : false;
 }
 
+void Window::ImplInitClipRegion()
+{
+    DBG_TESTSOLARMUTEX();
+
+    Region  aRegion;
+
+    // Put back backed up background
+    if ( mpWindowImpl->mpFrameData->mpFirstBackWin )
+        ImplInvalidateAllOverlapBackgrounds();
+    if ( mpWindowImpl->mbInPaint )
+        aRegion = *(mpWindowImpl->mpPaintRegion);
+    else
+    {
+        aRegion = *(ImplGetWinChildClipRegion());
+        // --- RTL -- only this region is in frame coordinates, so re-mirror it
+        // the mpWindowImpl->mpPaintRegion above is already correct (see ImplCallPaint()) !
+        if( ImplIsAntiparallel() )
+            ReMirror ( aRegion );
+    }
+    if ( mbClipRegion )
+        aRegion.Intersect( ImplPixelToDevicePixel( maRegion ) );
+    if ( aRegion.IsEmpty() )
+        mbOutputClipped = true;
+    else
+    {
+        mbOutputClipped = false;
+        ImplSelectClipRegion( aRegion );
+    }
+    mbClipRegionSet = true;
+
+    mbInitClipRegion = false;
+}
+
 void Window::EnableRTL ( bool bEnable )
 {
     StateChanged( STATE_CHANGE_MIRRORING );