DrawFilledCircle(Int32,Single,Single,Single,GdPictureColor,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 GdPictureColor, _
   ByVal AntiAlias As Boolean _
) As GdPictureStatus

public GdPictureStatus DrawFilledCircle( 
   int ImageID,
   float DstLeft,
   float DstTop,
   float Diameter,
   GdPictureColor FillColor,
   bool AntiAlias
)

public function DrawFilledCircle( 
    ImageID: Integer;
    DstLeft: Single;
    DstTop: Single;
    Diameter: Single;
    FillColor: GdPictureColor;
    AntiAlias: Boolean
): GdPictureStatus;

public function DrawFilledCircle( 
   ImageID : int,
   DstLeft : float,
   DstTop : float,
   Diameter : float,
   FillColor : GdPictureColor,
   AntiAlias : boolean
) : GdPictureStatus;

public: GdPictureStatus DrawFilledCircle( 
   int ImageID,
   float DstLeft,
   float DstTop,
   float Diameter,
   GdPictureColor FillColor,
   bool AntiAlias
)

public:
GdPictureStatus DrawFilledCircle( 
   int ImageID,
   float DstLeft,
   float DstTop,
   float Diameter,
   GdPictureColor 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