tdf#92982 vcl rendercontext: move buffer paint logic to PaintBufferGuard

The motivation is that this way vcl::Cursor will be able to reuse it.

Change-Id: I7e89d5acb5d63d3297d7c3c8050ccd2172c8608d

1 files changed, 4 insertions, 0 deletions

diff --git a/vcl/inc/window.h b/vcl/inc/window.h
index e2acda805f76..27d5ccc1c1bf 100644
--- a/vcl/inc/window.h
+++ b/vcl/inc/window.h
@@ -386,14 +386,18 @@ public:
 class PaintBufferGuard
 {
     ImplFrameData* mpFrameData;
+    VclPtr<vcl::Window> m_pWindow;
     bool mbBackground;
     Wallpaper maBackground;
     AllSettings maSettings;
     long mnOutOffX;
     long mnOutOffY;
+    Rectangle m_aPaintRect;
 public:
     PaintBufferGuard(ImplFrameData* pFrameData, vcl::Window* pWindow);
     ~PaintBufferGuard();
+    /// If this is called, then the dtor will also copy rRectangle to the window from the buffer, before restoring the state.
+    void SetPaintRect(const Rectangle& rRectangle);
 };
 
 // helper methods