gtk3: move cairo region clipping to svp

Change-Id: I4b4f09ee3fb7edbda3b6bb5af024c0966e3a2082
(cherry picked from commit edf56cb4)

vcl/headless/svpgdi.cxx

@@ -118,6 +118,20 @@ namespace
     }
 }
 
+void SvpSalGraphics::clipRegion(cairo_t* cr)
+{
+    if (!m_aClipRegion.IsEmpty())
+    {
+        RectangleVector aRectangles;
+        m_aClipRegion.GetRegionRectangles(aRectangles);
+        for (RectangleVector::const_iterator aRectIter(aRectangles.begin()); aRectIter != aRectangles.end(); ++aRectIter)
+        {
+            cairo_rectangle(cr, aRectIter->Left(), aRectIter->Top(), aRectIter->GetWidth(), aRectIter->GetHeight());
+        }
+        cairo_clip(cr);
+    }
+}
+
 #endif
 
 bool SvpSalGraphics::drawAlphaRect(long nX, long nY, long nWidth, long nHeight, sal_uInt8 nTransparency)

vcl/inc/headless/svpgdi.hxx

@@ -212,6 +212,7 @@ public:
 #if ENABLE_CAIRO_CANVAS
 
     static cairo_t*         createCairoContext(const basebmp::BitmapDeviceSharedPtr& rBuffer);
+    void                    clipRegion(cairo_t* cr);
 
 #endif // ENABLE_CAIRO_CANVAS
 

vcl/inc/unx/gtk/gtkgdi.hxx

@@ -61,8 +61,6 @@ public:
 
     cairo_t* getCairoContext() const;
 
-    void clipRegion(cairo_t* cr);
-
 private:
     GtkWidget       *mpWindow;
     static GtkStyleContext *mpButtonStyle;

vcl/unx/gtk3/gdi/gtk3salnativewidgets-gtk.cxx

@@ -2104,18 +2104,4 @@ cairo_t* GtkSalGraphics::getCairoContext() const
     return mpFrame->getCairoContext();
 }
 
-void GtkSalGraphics::clipRegion(cairo_t* cr)
-{
-    if (!m_aClipRegion.IsEmpty())
-    {
-        RectangleVector aRectangles;
-        m_aClipRegion.GetRegionRectangles(aRectangles);
-        for (RectangleVector::const_iterator aRectIter(aRectangles.begin()); aRectIter != aRectangles.end(); ++aRectIter)
-        {
-            cairo_rectangle(cr, aRectIter->Left(), aRectIter->Top(), aRectIter->GetWidth(), aRectIter->GetHeight());
-        }
-        cairo_clip(cr);
-    }
-}
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */