Sink for the shared DOCUMENT_GEOMETRY walk. More...

#include <diff_scene.h>

Public Member Functions
virtual	~GEOMETRY_SINK ()=default

virtual void	FillPolygon (const DOCUMENT_POLYGON &aPoly)=0

virtual void	StrokePolygon (const DOCUMENT_POLYGON &aPoly)=0

virtual void	DrawSegment (const DOCUMENT_SEGMENT &aSegment)=0

virtual void	DrawCircle (const DOCUMENT_CIRCLE &aCircle)=0

Detailed Description

Sink for the shared DOCUMENT_GEOMETRY walk.

The walk (IterateDocumentGeometry) owns the iteration order common to every renderer; each sink owns the API-specific draw calls and per-primitive guards.

Polygons are visited in two passes (every fill, then every stroke) so a filled-and-stroked outline gets both and a later filled polygon does not cover an earlier outline. A renderer that draws each polygon in a single call (e.g. the plotter, whose PlotPoly either fills or strokes) does its work in FillPolygon and leaves StrokePolygon empty.

Definition at line 183 of file diff_scene.h.