diff options
Diffstat (limited to 'drawinglayer/inc/drawinglayer/primitive2d/transformprimitive2d.hxx')
| -rw-r--r-- | drawinglayer/inc/drawinglayer/primitive2d/transformprimitive2d.hxx | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/drawinglayer/inc/drawinglayer/primitive2d/transformprimitive2d.hxx b/drawinglayer/inc/drawinglayer/primitive2d/transformprimitive2d.hxx index 1646667342af..1723cc708ea8 100644 --- a/drawinglayer/inc/drawinglayer/primitive2d/transformprimitive2d.hxx +++ b/drawinglayer/inc/drawinglayer/primitive2d/transformprimitive2d.hxx @@ -45,26 +45,47 @@ namespace drawinglayer { namespace primitive2d { + /** TransformPrimitive2D class + + This is one of the basic grouping primitives and it provides + embedding a sequence of primitives (a geometry) into a + transformation. All renderers have to handle this, usually by + building a current transformation stack (linear combination) + and applying this to all to-be-rendered geometry. If not handling + this, the output will be mostly wrong since this primitive is + widely used. + + It does transform by embedding an existing geometry into a + transformation as Child-content. This allows re-usage of the + refcounted Uno-Api primitives and their existung, buffered + decompositions. + + It could e.g. be used to show a single object geometry in 1000 + different, transformed states without the need to create those + thousand primitive contents. + */ class TransformPrimitive2D : public GroupPrimitive2D { private: + // the transformation to apply to the child geometry basegfx::B2DHomMatrix maTransformation; public: + /// constructor TransformPrimitive2D( const basegfx::B2DHomMatrix& rTransformation, const Primitive2DSequence& rChildren); - // get data + /// data read access const basegfx::B2DHomMatrix& getTransformation() const { return maTransformation; } - // compare operator + /// compare operator virtual bool operator==(const BasePrimitive2D& rPrimitive) const; - // get range + /// get range virtual basegfx::B2DRange getB2DRange(const geometry::ViewInformation2D& rViewInformation) const; - // provide unique ID + /// provide unique ID DeclPrimitrive2DIDBlock() }; } // end of namespace primitive2d |