include/cppcanvas/canvas.hxx

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  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_CPPCANVAS_CANVAS_HXX
  21 #define INCLUDED_CPPCANVAS_CANVAS_HXX
  22
  23 #include <com/sun/star/uno/Reference.hxx>
  24 #include <memory>
  25
  26 namespace basegfx
  27 {
  28     class B2DHomMatrix;
  29     class B2DPolyPolygon;
  30 }
  31
  32 namespace com { namespace sun { namespace star { namespace rendering
  33 {
  34     class  XCanvas;
  35     struct ViewState;
  36 } } } }
  37
  38
  39 /* Definition of BitmapCanvas */
  40
  41 namespace cppcanvas
  42 {
  43     class PolyPolygon;
  44     class Canvas;
  45
  46     // forward declaration, since tools::PolyPolygon also references Canvas
  47     typedef std::shared_ptr< PolyPolygon > PolyPolygonSharedPtr;
  48
  49     // forward declaration, since cloneCanvas() also references Canvas
  50     typedef std::shared_ptr< Canvas > CanvasSharedPtr;
  51
  52     /** Canvas interface
  53      */
  54     class Canvas
  55     {
  56     public:
  57         enum
  58         {
  59             /** Extra pixel used when canvas anti-aliases.
  60
  61                 Enlarge the bounding box of drawing primitives by this
  62                 amount in both dimensions, and on both sides of the
  63                 bounds, to account for extra pixel touched outside the
  64                 actual primitive bounding box, when the canvas
  65                 performs anti-aliasing.
  66              */
  67             ANTIALIASING_EXTRA_SIZE=2
  68         };
  69
  70         Canvas() = default;
  71         Canvas(Canvas const &) = default;
  72         Canvas(Canvas &&) = default;
  73         Canvas & operator =(Canvas const &) = default;
  74 #if !(defined __GNUC__ && !defined __clang__ && __GNUC__ == 8) // bogus -Werror=virtual-move-assign
  75         Canvas & operator =(Canvas &&) = default;
  76 #endif
  77
  78         virtual ~Canvas() {}
  79
  80         virtual void                             setTransformation( const ::basegfx::B2DHomMatrix& rMatrix ) = 0;
  81         virtual ::basegfx::B2DHomMatrix          getTransformation() const = 0;
  82
  83         virtual void                             setClip( const ::basegfx::B2DPolyPolygon& rClipPoly ) = 0;
  84         virtual void                             setClip() = 0;
  85
  86         /** Get current clip
  87
  88             @return NULL, if no clip is set, otherwise the current clip poly-polygon
  89          */
  90         virtual ::basegfx::B2DPolyPolygon const* getClip() const = 0;
  91
  92         virtual CanvasSharedPtr                  clone() const = 0;
  93         virtual void                             clear() const = 0;
  94
  95         // this should be considered private. if RTTI gets enabled
  96         // someday, remove that to a separate interface
  97         virtual css::uno::Reference<
  98             css::rendering::XCanvas >           getUNOCanvas() const = 0;
  99         virtual css::rendering::ViewState       getViewState() const = 0;
 100     };
 101
 102 }
 103
 104 #endif // INCLUDED_CPPCANVAS_CANVAS_HXX
 105
 106 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */