BitmapDataExtensionsDrawArc(IReadWriteBitmapData, Color32, PointF, PointF, Single, Single, Single, Boolean, Boolean, DrawingOptions) Method

Draws a one-pixel wide elliptical arc between two points 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 DrawArc(
	this IReadWriteBitmapData bitmapData,
	Color32 color,
	PointF startPoint,
	PointF endPoint,
	float radiusX,
	float radiusY,
	float rotationAngle,
	bool isLargeArc,
	bool isClockwise,
	DrawingOptions? drawingOptions = null
)

VB

<ExtensionAttribute>
Public Shared Sub DrawArc ( 
	bitmapData As IReadWriteBitmapData,
	color As Color32,
	startPoint As PointF,
	endPoint As PointF,
	radiusX As Single,
	radiusY As Single,
	rotationAngle As Single,
	isLargeArc As Boolean,
	isClockwise As Boolean,
	Optional drawingOptions As DrawingOptions = Nothing
)

C++

public:
[ExtensionAttribute]
static void DrawArc(
	IReadWriteBitmapData^ bitmapData, 
	Color32 color, 
	PointF startPoint, 
	PointF endPoint, 
	float radiusX, 
	float radiusY, 
	float rotationAngle, 
	bool isLargeArc, 
	bool isClockwise, 
	DrawingOptions^ drawingOptions = nullptr
)

F#

[<ExtensionAttribute>]
static member DrawArc : 
        bitmapData : IReadWriteBitmapData * 
        color : Color32 * 
        startPoint : PointF * 
        endPoint : PointF * 
        radiusX : float32 * 
        radiusY : float32 * 
        rotationAngle : float32 * 
        isLargeArc : bool * 
        isClockwise : bool * 
        ?drawingOptions : DrawingOptions 
(* Defaults:
        let _drawingOptions = defaultArg drawingOptions null
*)
-> unit

Parameters

bitmapData IReadWriteBitmapData: The IReadWriteBitmapData instance to draw on.
color Color32: The color of the arc to draw.
startPoint PointF: The starting point of the arc to add.
endPoint PointF: The end point of the arc to add.
radiusX Single: The radius along the x-axis of the ellipse from which the arc is drawn.
radiusY Single: The radius along the y-axis of the ellipse from which the arc is drawn.
rotationAngle Single: The angle, in degrees, by which the ellipse is rotated relative to the x-axis.
isLargeArc Boolean: if the arc span is 180 degrees or greater; otherwise, .
isClockwise Boolean: if the arc is drawn in a clockwise direction; otherwise, .
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

This method tries to use a shortcut to draw the arc directly, which is faster than creating a Path and adding the arc 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 arc is drawn repeatedly, creating a Path with PreferCaching enabled can provide a better performance.

This overload provides the same parameters that are used in SVG paths for elliptical arcs, and also by several XAML-based frameworks, such as WPF, UWP, and WinUI.

If radiusX or radiusY is negative, their absolute value will be used.

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 BeginDrawArc or DrawArcAsync (in .NET Framework 4.0 and above) methods to perform the operation asynchronously.

Exceptions

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