BitmapDataExtensionsDrawRoundedRectangle(IReadWriteBitmapData, Color32, Rectangle, Int32, DrawingOptions) Method

Draws a one-pixel wide rounded rectangle with the specified color, applying the same corner radius to all corners.

Definition

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

C#

public static void DrawRoundedRectangle(
	this IReadWriteBitmapData bitmapData,
	Color32 color,
	Rectangle bounds,
	int cornerRadius,
	DrawingOptions? drawingOptions = null
)

VB

<ExtensionAttribute>
Public Shared Sub DrawRoundedRectangle ( 
	bitmapData As IReadWriteBitmapData,
	color As Color32,
	bounds As Rectangle,
	cornerRadius As Integer,
	Optional drawingOptions As DrawingOptions = Nothing
)

C++

public:
[ExtensionAttribute]
static void DrawRoundedRectangle(
	IReadWriteBitmapData^ bitmapData, 
	Color32 color, 
	Rectangle bounds, 
	int cornerRadius, 
	DrawingOptions^ drawingOptions = nullptr
)

F#

[<ExtensionAttribute>]
static member DrawRoundedRectangle : 
        bitmapData : IReadWriteBitmapData * 
        color : Color32 * 
        bounds : Rectangle * 
        cornerRadius : int * 
        ?drawingOptions : DrawingOptions 
(* Defaults:
        let _drawingOptions = defaultArg drawingOptions null
*)
-> unit

Parameters

bitmapData IReadWriteBitmapData: The IReadWriteBitmapData instance to draw on.
color Color32: The color of the rounded rectangle to draw.
bounds Rectangle: The bounding rectangle that defines the rounded rectangle.
cornerRadius Int32: The size of the corner radius of the rounded rectangle for all corners.
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

When drawing a one-pixel wide rounded rectangle, the right/bottom values of the bounding rectangle are inclusive, so if the width and height are zero, a single pixel will be drawn.

If cornerRadius is negative, the absolute value will be used. If it is greater than the half of the smaller side of the bounding rectangle, it will be adjusted to the half of the smaller side, so the result will be an oval shape. If the cornerRadius is 0, a simple rectangle will be drawn.

This method tries to use a shortcut to draw the rounded rectangle directly, which is faster than creating a Path and adding the rounded rectangle 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 rounded rectangle is 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 BeginDrawRoundedRectangle or DrawRoundedRectangleAsync (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.