BitmapDataExtensionsDrawLines(IReadWriteBitmapData, Color32, IEnumerablePointF, DrawingOptions) Method

Draws a series of connected, one-pixel wide lines with the specified color.

Definition

Namespace: KGySoft.Drawing.Shapes
Assembly: KGySoft.Drawing.Core (in KGySoft.Drawing.Core.dll) Version: 10.0.0-rc.1

C#

public static void DrawLines(
	this IReadWriteBitmapData bitmapData,
	Color32 color,
	IEnumerable<PointF> points,
	DrawingOptions? drawingOptions = null
)

VB

<ExtensionAttribute>
Public Shared Sub DrawLines ( 
	bitmapData As IReadWriteBitmapData,
	color As Color32,
	points As IEnumerable(Of PointF),
	Optional drawingOptions As DrawingOptions = Nothing
)

C++

public:
[ExtensionAttribute]
static void DrawLines(
	IReadWriteBitmapData^ bitmapData, 
	Color32 color, 
	IEnumerable<PointF>^ points, 
	DrawingOptions^ drawingOptions = nullptr
)

F#

[<ExtensionAttribute>]
static member DrawLines : 
        bitmapData : IReadWriteBitmapData * 
        color : Color32 * 
        points : IEnumerable<PointF> * 
        ?drawingOptions : DrawingOptions 
(* Defaults:
        let _drawingOptions = defaultArg drawingOptions null
*)
-> unit

Parameters

bitmapData IReadWriteBitmapData: The IReadWriteBitmapData instance to draw on.
color Color32: The color of the lines to draw.
points IEnumerablePointF: The points of the line segments to draw.
drawingOptions DrawingOptions (Optional): A DrawingOptions instance that specifies the drawing options to use. If , then the default options are used. This parameter is optional.
Default value: .

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IReadWriteBitmapData. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Remarks

The first point of the points array will be the starting point of the first line segment. Each additional point specifies the endpoint of a line segment, whose starting point is the endpoint of the previous line.

This method tries to use a shortcut to draw the lines directly, which is faster than creating a Path and adding the lines to it. A shortcut is possible when drawingOptions is and the specified color is opaque, or when FastThinLines is enabled in drawingOptions, and it specifies that no anti-aliasing and no alpha blending is required, the transformation is the identity matrix, and neither Quantizer nor Ditherer is specified.

When no shortcut can be used and the same lines are drawn repeatedly, creating a Path with PreferCaching enabled can provide a better performance.

Note

This method adjusts the degree of parallelization automatically, blocks the caller, and does not support cancellation or reporting progress. You can use the overloads that have a ParallelConfig parameter to configure these, while still executing the method synchronously. Alternatively, use the BeginDrawLines or DrawLinesAsync (in .NET Framework 4.0 and above) methods to perform the operation asynchronously.

Exceptions

ArgumentNullException	bitmapData or points is .
OverflowException	The coordinates (after a possible transformation specified in drawingOptions) are outside the bounds of an int value.