include/cppcanvas/bitmapcanvas.hxx

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  19
  20 #ifndef _CPPCANVAS_BITMAPCANVAS_HXX
  21 #define _CPPCANVAS_BITMAPCANVAS_HXX
  22
  23 #include <sal/types.h>
  24 #include <osl/diagnose.h>
  25
  26 #include <boost/shared_ptr.hpp>
  27 #include <basegfx/vector/b2isize.hxx>
  28 #include <cppcanvas/canvas.hxx>
  29
  30
  31 /* Definition of BitmapCanvas */
  32
  33 namespace cppcanvas
  34 {
  35     class BitmapCanvas;
  36
  37     // forward declaration, since cloneBitmapCanvas() also references BitmapCanvas
  38     typedef ::boost::shared_ptr< BitmapCanvas > BitmapCanvasSharedPtr;
  39
  40     /** BitmapCanvas interface
  41      */
  42     class BitmapCanvas : public virtual Canvas
  43     {
  44     public:
  45         virtual ::basegfx::B2ISize      getSize() const = 0;
  46
  47         // shared_ptr does not allow for covariant return types
  48         BitmapCanvasSharedPtr           cloneBitmapCanvas() const
  49         {
  50             BitmapCanvasSharedPtr p( ::boost::dynamic_pointer_cast< BitmapCanvas >(this->clone()) );
  51             OSL_ENSURE(p.get(), "BitmapCanvas::cloneBitmapCanvas(): dynamic cast failed");
  52             return p;
  53         }
  54     };
  55
  56 }
  57
  58 #endif /* _CPPCANVAS_BITMAPCANVAS_HXX */
  59
  60 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */