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21 
22 
23 
24 #ifndef _CPPCANVAS_BITMAPCANVAS_HXX
25 #define _CPPCANVAS_BITMAPCANVAS_HXX
26 
27 #include <sal/types.h>
28 #include <osl/diagnose.h>
29 
30 #include <boost/shared_ptr.hpp>
31 #include <basegfx/vector/b2isize.hxx>
32 #include <cppcanvas/canvas.hxx>
33 
34 
35 /* Definition of BitmapCanvas */
36 
37 namespace cppcanvas
38 {
39     class BitmapCanvas;
40 
41     // forward declaration, since cloneBitmapCanvas() also references BitmapCanvas
42     typedef ::boost::shared_ptr< BitmapCanvas > BitmapCanvasSharedPtr;
43 
44     /** BitmapCanvas interface
45      */
46     class BitmapCanvas : public virtual Canvas
47     {
48     public:
49         virtual ::basegfx::B2ISize 		getSize() const = 0;
50 
51         // shared_ptr does not allow for covariant return types
cloneBitmapCanvas() const52         BitmapCanvasSharedPtr			cloneBitmapCanvas() const
53         {
54             BitmapCanvasSharedPtr p( ::boost::dynamic_pointer_cast< BitmapCanvas >(this->clone()) );
55             OSL_ENSURE(p.get(), "BitmapCanvas::cloneBitmapCanvas(): dynamic cast failed");
56             return p;
57         }
58     };
59 
60 }
61 
62 #endif /* _CPPCANVAS_BITMAPCANVAS_HXX */
63