include/drawinglayer/primitive2d/transparenceprimitive2d.hxx

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  19
  20 #ifndef INCLUDED_DRAWINGLAYER_PRIMITIVE2D_TRANSPARENCEPRIMITIVE2D_HXX
  21 #define INCLUDED_DRAWINGLAYER_PRIMITIVE2D_TRANSPARENCEPRIMITIVE2D_HXX
  22
  23 #include <drawinglayer/drawinglayerdllapi.h>
  24
  25 #include <drawinglayer/primitive2d/groupprimitive2d.hxx>
  26
  27
  28
  29 namespace drawinglayer
  30 {
  31     namespace primitive2d
  32     {
  33         /** TransparencePrimitive2D class
  34
  35             This is the basic primitive for applying freely defined transparence
  36             to freely defined content. The basic idea is to associate a content
  37             which is defined as a sequence of primitives and hold as child content
  38             in the GroupPrimitive2D with a transparence channel also defined as a sequence
  39             of primitives and hold in the transparence member.
  40
  41             The basic definition is to use the transparence content as transparence-Mask by
  42             interpreting the transparence-content not as RGB, but as Luminance transparence mask
  43             using the common RGB_to_luminance definition as e.g. used by VCL.
  44
  45             The defining geometry is the Range of the child primitive sequence,
  46             this means the renderers will/shall use this geometric information for
  47             rendering, not the transparent one. The transparent one should/will be clipped
  48             accordingly.
  49          */
  50         class DRAWINGLAYER_DLLPUBLIC TransparencePrimitive2D : public GroupPrimitive2D
  51         {
  52         private:
  53             /// The transparence-Mask who's RGB-Values are interpreted as Luminance
  54             Primitive2DSequence                     maTransparence;
  55
  56         public:
  57             /** constructor
  58
  59                 @param rChildren
  60                 The content which is defined to have a transparency. The
  61                 range of this primitive is defined by this content
  62
  63                 @param rTransparence
  64                 The definition of the Transparence-channel for this primitive. It
  65                 will be interpreted as mask by interpreting as gray values
  66                 using the common RGB_to_luminance definitions
  67              */
  68             TransparencePrimitive2D(
  69                 const Primitive2DSequence& rChildren,
  70                 const Primitive2DSequence& rTransparence);
  71
  72             /// data read access
  73             const Primitive2DSequence& getTransparence() const { return maTransparence; }
  74
  75             /// compare operator
  76             virtual bool operator==(const BasePrimitive2D& rPrimitive) const SAL_OVERRIDE;
  77
  78             /// provide unique ID
  79             DeclPrimitive2DIDBlock()
  80         };
  81     } // end of namespace primitive2d
  82 } // end of namespace drawinglayer
  83
  84
  85
  86 #endif //INCLUDED_DRAWINGLAYER_PRIMITIVE2D_TRANSPARENCEPRIMITIVE2D_HXX
  87
  88 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */