Declaration

procedure PolylineFS(Bitmap: TCustomBitmap32; const Points: TArrayOfFloatPoint; Color: TColor32; Closed: Boolean = False; StrokeWidth: TFloat = 1.0; JoinStyle: TJoinStyle = jsMiter; EndStyle: TEndStyle = esButt; MiterLimit: TFloat = 4.0; Transformation: TTransformation = nil); overload;
procedure PolylineFS(Bitmap: TCustomBitmap32; const Points: TArrayOfFloatPoint; Filler: TCustomPolygonFiller; Closed: Boolean = False; StrokeWidth: TFloat = 1.0; JoinStyle: TJoinStyle = jsMiter; EndStyle: TEndStyle = esButt; MiterLimit: TFloat = 4.0; Transformation: TTransformation = nil); overload;

procedure PolylineXS(Bitmap: TCustomBitmap32; const Points: TArrayOfFixedPoint; Color: TColor32; Closed: Boolean = False; StrokeWidth: TFixed = $10000; JoinStyle: TJoinStyle = jsMiter; EndStyle: TEndStyle = esButt; MiterLimit: TFixed = $40000; Transformation: TTransformation = nil); overload;
procedure PolylineXS(Bitmap: TCustomBitmap32; const Points: TArrayOfFixedPoint; Filler: TCustomPolygonFiller; Closed: Boolean = False; StrokeWidth: TFixed = $10000; JoinStyle: TJoinStyle = jsMiter; EndStyle: TEndStyle = esButt; MiterLimit: TFixed = $40000; Transformation: TTransformation = nil); overload;

Parameters

Parameter	Type	Description
Bitmap	TCustomBitmap32	Destination bitmap.
Points	-	Polyline vertices.
Color	TColor32	Solid stroke color.
Filler	TCustomPolygonFiller	Custom span filler.
Closed	Boolean	Specifies whether the polyline forms a closed loop.
StrokeWidth	-	Stroke line width.
JoinStyle	TJoinStyle	Corner join style (jsMiter, jsBevel, jsRound).
EndStyle	TEndStyle	Line end cap style (esButt, esSquare, esRound).
MiterLimit	-	Miter limit ratio before beveling sharp miter joins.
Transformation	TTransformation	Optional coordinate transformation.

Description

The Polyline routines render a single stroked polyline contour defined by Points onto a destination Bitmap.

Function variants support floating-point (FS) and fixed-point (XS) coordinate inputs as well as solid color or custom span filler rendering. Stroke outlines are generated automatically according to StrokeWidth, JoinStyle, EndStyle, and MiterLimit.

Variants

Variant	Coordinate Type	Description
PolylineFS	Floating-point	Renders a single floating-point polyline contour with antialiased stroke outlines.
PolylineXS	Fixed-point	Renders a single fixed-point polyline contour with antialiased stroke outlines.

Example

var
  Pts: TArrayOfFloatPoint;
begin
  SetLength(Pts, 4);
  Pts[0] := FloatPoint(10.0, 10.0);
  Pts[1] := FloatPoint(50.0, 80.0);
  Pts[2] := FloatPoint(90.0, 20.0);
  Pts[3] := FloatPoint(130.0, 90.0);

  // Render open polyline with 3.0px width and round caps/joins
  PolylineFS(Bitmap, Pts, clBlack32, False, 3.0, jsRound, esRound);
end;

See also

• Naming Conventions
• PolyPolyline
• Polygon
• DashLine