DrawArc(Int32,Single,Single,Single,Single,Single,Single,Single,Int32,Boolean) Method

In This Topic

Draws an arc on a GdPicture image. The arc is part of an ellipse. This method takes a color integer as the PenColor parameter.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Overloads Function DrawArc( _
   ByVal ImageID As Integer, _
   ByVal DstLeft As Single, _
   ByVal DstTop As Single, _
   ByVal Width As Single, _
   ByVal Height As Single, _
   ByVal StartAngle As Single, _
   ByVal SweepAngle As Single, _
   ByVal PenWidth As Single, _
   ByVal PenColor As Integer, _
   ByVal AntiAlias As Boolean _
) As GdPictureStatus

public GdPictureStatus DrawArc( 
   int ImageID,
   float DstLeft,
   float DstTop,
   float Width,
   float Height,
   float StartAngle,
   float SweepAngle,
   float PenWidth,
   int PenColor,
   bool AntiAlias
)

public function DrawArc( 
    ImageID: Integer;
    DstLeft: Single;
    DstTop: Single;
    Width: Single;
    Height: Single;
    StartAngle: Single;
    SweepAngle: Single;
    PenWidth: Single;
    PenColor: Integer;
    AntiAlias: Boolean
): GdPictureStatus;

public function DrawArc( 
   ImageID : int,
   DstLeft : float,
   DstTop : float,
   Width : float,
   Height : float,
   StartAngle : float,
   SweepAngle : float,
   PenWidth : float,
   PenColor : int,
   AntiAlias : boolean
) : GdPictureStatus;

public: GdPictureStatus DrawArc( 
   int ImageID,
   float DstLeft,
   float DstTop,
   float Width,
   float Height,
   float StartAngle,
   float SweepAngle,
   float PenWidth,
   int PenColor,
   bool AntiAlias
)

public:
GdPictureStatus DrawArc( 
   int ImageID,
   float DstLeft,
   float DstTop,
   float Width,
   float Height,
   float StartAngle,
   float SweepAngle,
   float PenWidth,
   int PenColor,
   bool AntiAlias
)

Parameters

ImageID: GdPicture image identifier.
DstLeft: Specifies the x-coordinate of the upper-left corner of the bounding rectangle for the ellipse that contains the arc.
DstTop: Specifies the y-coordinate of the upper-left corner of the bounding rectangle for the ellipse that contains the arc.
Width: Specifies the width of the ellipse that contains the arc.
Height: Specifies the height of the ellipse that contains the arc.
StartAngle: Specifies the angle between the x-axis and the starting point of the arc.
SweepAngle: Specifies the angle between the starting and ending points of the arc.
PenWidth: The width, in pixel, of the pen used to draw the arc.
PenColor: Color of the arc. A suitable color value can be obtained by using the ARGBI() method.
AntiAlias: Set to True to apply the Antialiasing algorithm else False.

Return Value

A member of the GdPictureStatus enumeration.

Remarks

This method requires the Image Documents component to run.

Example

Drawing a red arc on top of a black ellipse on a pgn image.

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("input.png");
 
    // Draw the black elipse.
    gdpictureImaging.DrawEllipse(imageID, 50, 50, 100, 50, gdpictureImaging.ARGBI(255, 0, 0, 0), 1, true);
 
    // Draw the red arc using the same ellipse parameters and chosen angles.
    gdpictureImaging.DrawArc(imageID, 50, 50, 100, 50, 200, 160, 2, gdpictureImaging.ARGBI(255, 255, 0, 0), true);
 
    gdpictureImaging.SaveAsPNG(imageID, "output.png");
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Reference

GdPictureImaging Class
GdPictureImaging Members
Overload List
ARGBI Method