Public Function New( _
   ByVal type As HalfToneCommandType, _
   ByVal angle As Integer, _
   ByVal dimension As Integer, _
   ByVal userDefinedImage As RasterImage _
)

Visual Basic (Usage)	Copy Code
Dim type As HalfToneCommandType Dim angle As Integer Dim dimension As Integer Dim userDefinedImage As RasterImage   Dim instance As HalfToneCommand(type, angle, dimension, userDefinedImage)

public HalfToneCommand( 
   HalfToneCommandType type,
   int angle,
   int dimension,
   RasterImage userDefinedImage
)

public:
HalfToneCommand( 
   HalfToneCommandType type,
   int angle,
   int dimension,
   RasterImage userDefinedImage
)

Parameters

type

Value that indicates the type of halftoning to perform.

angle

The angle of rotation, expressed in hundredths of degrees. A value of 0 produces a horizontal halftone pattern. This parameter specifies the number of degrees to change the pattern. Positive values rotate the pattern clockwise; negative values rotate the pattern counterclockwise. This value is ignored if the selected halftone pattern is HalfToneCommandType.Rectangle, HalfToneCommandType.Circle or HalfToneCommandType.Random or HalfToneCommandType.UserDefined.

dimension

Value that indicates the size of the grain. This value is ignored if the selected halftone pattern is HalfToneCommandType.View or HalfToneCommandType.Print. If the pattern is not HalfToneCommandType.View or HalfToneCommandType.Print, dimension should be >= 1. If this parameter is < 1 this command will return ERROR_INV_PARAMETER.

userDefinedImage

List of images that will be used in half toning if the HalfToneCommandType.UserDefined option is selected.

Run the HalfToneCommand on an image.

Visual Basic

Copy Code

Public Sub HalfToneConstructorExample()    RasterCodecs.Startup()    Dim codecs As New RasterCodecs()    codecs.ThrowExceptionsOnInvalidImages = True    Dim leadImage As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Master.jpg")    ' Prepare the command    Try       Dim images() As RasterImage       ReDim images(1)       images(0) = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Ulay3.bmp", 24, CodecsLoadByteOrder.Bgr, 1, 1)       images(1) = images(0)       images(0).AddPage(images(1))       Dim command As HalfToneCommand = New HalfToneCommand(HalfToneCommandType.UserDefined, 0, 1, images(0))       'Halftone the image.       command.Run(leadImage)    Catch ex As Exception       MessageBox.Show(ex.Message, "HalfToneTest", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)    End Try    RasterCodecs.Shutdown() End Sub

C#

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public void HalfToneConstructorExample()  {     // Load an image     RasterCodecs.Startup();     RasterCodecs codecs = new RasterCodecs();     codecs.ThrowExceptionsOnInvalidImages = true;       RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Master.jpg");       // Prepare the command     RasterImage[] images = new RasterImage[2];     images[0] = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Ulay3.bmp", 24, CodecsLoadByteOrder.Bgr, 1, 1);     images[1] = images[0];     images[0].AddPage(images[1]);     HalfToneCommand command = new HalfToneCommand(HalfToneCommandType.UserDefined, 0, 1, images[0]);     // Halftone the image.     command.Run(image);       RasterCodecs.Shutdown();  }

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

Reference