Description

The GR32_Brushes unit provides a modular vector brush architecture for rendering vector paths and polygons in Graphics32.

Brushes encapsulate polygon drawing behaviors (such as outline stroking, polygon expansion/shrinking, dashed pattern generation, and solid color/filler assignment) and can be chained together in brush collections or composite nested brushes.

Key classes and types in GR32_Brushes include:

• Brush Collection: TBrushCollection manages an ordered list of brush instances assigned to an owner object.
• Base Class: TCustomBrush defines the fundamental interface and pipeline methods for vector path processing and rendering (PolygonFS, PolyPolygonFS, PolyPolygonMixedFS).
• Solid Brush: TSolidBrush applies fill color, fill mode, or custom polygon fillers (TCustomPolygonFiller) to vector shapes.
• Nested Brush: TNestedBrush contains its own child TBrushCollection, executing multiple brush effects sequentially on the same geometry.
• Stroke Brush: TStrokeBrush converts closed or open vector paths into stroked outlines using specified line widths, join styles, end styles, and miter limits.
• Grow Brush: TGrowBrush inflates or deflates polygon boundaries by a floating-point grow amount.
• Dashed Brush: TDashedBrush splits vector outlines into dashed line segments using custom dash pattern arrays and offsets before stroking.