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diff --git a/canvas/source/tools/surfacerect.hxx b/canvas/source/tools/surfacerect.hxx
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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef INCLUDED_CANVAS_SURFACERECT_HXX
+#define INCLUDED_CANVAS_SURFACERECT_HXX
+
+#include <basegfx/point/b2ipoint.hxx>
+#include <basegfx/vector/b2isize.hxx>
+
+namespace canvas
+{
+    //////////////////////////////////////////////////////////////////////////////////
+    // SurfaceRect
+    //////////////////////////////////////////////////////////////////////////////////
+
+    struct SurfaceRect
+    {
+        ::basegfx::B2IPoint maPos;
+        ::basegfx::B2ISize  maSize;
+        ::basegfx::B2IPoint maBackup;
+        bool                bEnabled;
+
+        explicit SurfaceRect( const ::basegfx::B2ISize &rSize ) :
+            maPos(),
+            maSize(rSize),
+            maBackup(),
+            bEnabled(true)
+        {
+        }
+
+        // coordinates contained in this rectangle are
+        // constrained to the following rules:
+        // 1) p.x >= pos.x
+        // 2) p.x <= pos.x+size.x
+        // 3) p.y >= pos.y
+        // 4) p.y <= pos.y+size.y
+        // in other words, 'size' means the number of pixels
+        // this rectangle encloses plus one. for example with pos[0,0]
+        // and size[512,512], p[512,512] would return inside.
+        // a size of [0,0] therefore denotes a one-by-one rectangle.
+        bool pointInside( sal_Int32 px, sal_Int32 py ) const
+        {
+            const sal_Int32 x1(maPos.getX());
+            const sal_Int32 y1(maPos.getY());
+            const sal_Int32 x2(maPos.getX()+maSize.getX());
+            const sal_Int32 y2(maPos.getY()+maSize.getY());
+            if(px  < x1) return false;
+            if(px >= x2) return false;
+            if(py  < y1) return false;
+            if(py >= y2) return false;
+            return true;
+        }
+
+        // returns true if the horizontal line intersects the rect.
+        bool hLineIntersect( sal_Int32 lx1, sal_Int32 lx2, sal_Int32 ly ) const
+        {
+            const sal_Int32 x1(maPos.getX());
+            const sal_Int32 y1(maPos.getY());
+            const sal_Int32 x2(maPos.getX()+maSize.getX());
+            const sal_Int32 y2(maPos.getY()+maSize.getY());
+            if(ly < y1) return false;
+            if(ly >= y2) return false;
+            if((lx1 < x1) && (lx2 < x1)) return false;
+            if((lx1 >= x2) && (lx2 >= x2)) return false;
+            return true;
+        }
+
+        //! Returns true if the vertical line intersects the rect.
+        bool vLineIntersect( sal_Int32 lx, sal_Int32 ly1, sal_Int32 ly2 ) const
+        {
+            const sal_Int32 x1(maPos.getX());
+            const sal_Int32 y1(maPos.getY());
+            const sal_Int32 x2(maPos.getX()+maSize.getX());
+            const sal_Int32 y2(maPos.getY()+maSize.getY());
+            if(lx < x1) return false;
+            if(lx >= x2) return false;
+            if((ly1 < y1) && (ly2 < y1)) return false;
+            if((ly1 >= y2) && (ly2 >= y2)) return false;
+            return true;
+        }
+
+        // returns true if the passed rect intersects this one.
+        bool intersection( const SurfaceRect& r ) const
+        {
+            const sal_Int32 x1(maPos.getX());
+            const sal_Int32 y1(maPos.getY());
+            const sal_Int32 x2(maPos.getX()+maSize.getX());
+            const sal_Int32 y2(maPos.getY()+maSize.getY());
+            if(r.hLineIntersect(x1,x2,y1)) return true;
+            if(r.hLineIntersect(x1,x2,y2)) return true;
+            if(r.vLineIntersect(x1,y1,y2)) return true;
+            if(r.vLineIntersect(x2,y1,y2)) return true;
+            return false;
+        }
+
+        bool inside( const SurfaceRect& r ) const
+        {
+            const sal_Int32 x1(maPos.getX());
+            const sal_Int32 y1(maPos.getY());
+            const sal_Int32 x2(maPos.getX()+maSize.getX());
+            const sal_Int32 y2(maPos.getY()+maSize.getY());
+            if(!(r.pointInside(x1,y1))) return false;
+            if(!(r.pointInside(x2,y1))) return false;
+            if(!(r.pointInside(x2,y2))) return false;
+            if(!(r.pointInside(x1,y2))) return false;
+            return true;
+        }
+    };
+}
+
+#endif