DrawFilledCircle(Int32,Single,Single,Single,Color,Boolean) Method

In This Topic

Draws a filled circle on a GdPicture image.

Syntax

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

'Declaration

 

Public Overloads Function DrawFilledCircle( _

   ByVal ImageID As Integer, _

   ByVal DstLeft As Single, _

   ByVal DstTop As Single, _

   ByVal Diameter As Single, _

   ByVal FillColor As Color, _

   ByVal AntiAlias As Boolean _

) As GdPictureStatus

public GdPictureStatus DrawFilledCircle( 

   int ImageID,

   float DstLeft,

   float DstTop,

   float Diameter,

   Color FillColor,

   bool AntiAlias

)

public function DrawFilledCircle( 

    ImageID: Integer;

    DstLeft: Single;

    DstTop: Single;

    Diameter: Single;

    FillColor: Color;

    AntiAlias: Boolean

): GdPictureStatus;

public function DrawFilledCircle( 

   ImageID : int,

   DstLeft : float,

   DstTop : float,

   Diameter : float,

   FillColor : Color,

   AntiAlias : boolean

) : GdPictureStatus;

public: GdPictureStatus DrawFilledCircle( 

   int ImageID,

   float DstLeft,

   float DstTop,

   float Diameter,

   Color FillColor,

   bool AntiAlias

)

public:

GdPictureStatus DrawFilledCircle( 

   int ImageID,

   float DstLeft,

   float DstTop,

   float Diameter,

   Color FillColor,

   bool AntiAlias

)

Parameters

ImageID: GdPicture image identifier.
DstLeft: Specifies the x-coordinate of the center of the circle.
DstTop: Specifies the y-coordinate of the center of the circle.
Diameter: Diameter of the circle in pixel.
FillColor: Color of the circle. A suitable color value can be obtained by using the ARGB() method.
AntiAlias: Set to True to apply the Antialiasing algorithm else False.

Return Value

A member of the GdPictureStatus enumeration.

Example

Drawing a filled circle.

Rendering an image with a circle onto the background image and saving the result into a png file.

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())

{

    Color backColor = gdpictureImaging.ARGB(255, 0, 255, 0); // Green color

    Color circleColor = gdpictureImaging.ARGB(255, 255, 0, 0); // Red color

 

    // Create a background image.

    int backImage = gdpictureImaging.CreateNewGdPictureImage(320, 200, 32, backColor);

 

    // Create an image used for drawing, and draw a circle on it.

    int circleImage = gdpictureImaging.CreateNewGdPictureImage(80, 80, 32, gdpictureImaging.ARGB(0, 0, 0, 0));

    gdpictureImaging.DrawFilledCircle(circleImage, 40, 40, 60, circleColor, false);

 

    // Draw an image with a circle onto the background image.

    gdpictureImaging.DrawGdPictureImage(circleImage, backImage, 0, 0, 80, 80, System.Drawing.Drawing2D.InterpolationMode.Default);

    gdpictureImaging.SaveAsPNG(backImage, "output.png");

 

    // Release used resources.

    gdpictureImaging.ReleaseGdPictureImage(circleImage);

    gdpictureImaging.ReleaseGdPictureImage(backImage);

}

Filling a green circle with a center at 200, 250 and a diameter of 100 pixels.

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())

{

    int centerX = 200, centerY = 250, diameter = 100;

    int imageID = gdpictureImaging.CreateNewGdPictureImage(400, 400, System.Drawing.Imaging.PixelFormat.Format24bppRgb, Color.White);

 

    // Fill the circle. The AntiAlias parameter is set to true to apply antialiasing algorithm, i.e. to improve the appearance of the circle boundary.

    gdpictureImaging.DrawFilledCircle(imageID, centerX, centerY, diameter, Color.Green, true);

 

    gdpictureImaging.SaveAsPNG(imageID, "output.png");

 

    // Release used resources.

    gdpictureImaging.ReleaseGdPictureImage(imageID);

}

Reference

GdPictureImaging Class
GdPictureImaging Members
Overload List
ARGB(Byte,Byte,Byte,Byte) Method