cppcanvas/source/mtfrenderer/cachedprimitivebase.hxx

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  19
  20 #ifndef INCLUDED_CPPCANVAS_SOURCE_MTFRENDERER_CACHEDPRIMITIVEBASE_HXX
  21 #define INCLUDED_CPPCANVAS_SOURCE_MTFRENDERER_CACHEDPRIMITIVEBASE_HXX
  22
  23 #include <com/sun/star/uno/Reference.hxx>
  24 #include <com/sun/star/rendering/XCanvas.hpp>
  25
  26 #include <cppcanvas/canvas.hxx>
  27
  28 #include "action.hxx"
  29
  30 namespace basegfx { class B2DHomMatrix; }
  31
  32
  33 /* Definition of internal::CachedPrimitiveBase class */
  34
  35 namespace cppcanvas
  36 {
  37     namespace internal
  38     {
  39         /** Base class providing cached re-rendering, if XCanvas
  40             returns XCachedPrimitive
  41
  42             Derive from this class and implement private render()
  43             method to perform the actual primitive rendering. Return
  44             cached primitive into given reference. Next time this
  45             class' public render() method gets called, the cached
  46             representation is taken.
  47          */
  48         class CachedPrimitiveBase : public Action
  49         {
  50         public:
  51             /** Constructor
  52
  53                 @param rCanvas
  54                 Canvas on which this primitive is to appear
  55
  56                 @param bOnlyRedrawWithSameTransform
  57                 When true, this class only reuses the cached
  58                 primitive, if the overall transformation stays the
  59                 same. Otherwise, repaints are always performed via the
  60                 cached primitive.
  61              */
  62             CachedPrimitiveBase( const CanvasSharedPtr& rCanvas,
  63                                  bool                   bOnlyRedrawWithSameTransform );
  64             virtual ~CachedPrimitiveBase() {}
  65
  66             CachedPrimitiveBase(const CachedPrimitiveBase&) = delete;
  67             const CachedPrimitiveBase& operator=(const CachedPrimitiveBase&) = delete;
  68
  69             virtual bool render( const ::basegfx::B2DHomMatrix& rTransformation ) const override;
  70
  71         protected:
  72             using Action::render;
  73
  74         private:
  75             virtual bool renderPrimitive( css::uno::Reference< css::rendering::XCachedPrimitive >& rCachedPrimitive,
  76                                           const ::basegfx::B2DHomMatrix& rTransformation ) const = 0;
  77
  78             CanvasSharedPtr                                                 mpCanvas;
  79             mutable css::uno::Reference< css::rendering::XCachedPrimitive > mxCachedPrimitive;
  80             mutable ::basegfx::B2DHomMatrix                                 maLastTransformation;
  81             const bool                                                      mbOnlyRedrawWithSameTransform;
  82         };
  83     }
  84 }
  85
  86 #endif // INCLUDED_CPPCANVAS_SOURCE_MTFRENDERER_CACHEDPRIMITIVEBASE_HXX
  87
  88 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */