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AlphaBlendCommand Constructor(RasterImage,LeadPoint,LeadRect,Int32)
See Also  Example
Leadtools.ImageProcessing.Effects Namespace > AlphaBlendCommand Class > AlphaBlendCommand Constructor : AlphaBlendCommand Constructor(RasterImage,LeadPoint,LeadRect,Int32)



sourceImage
RasterImage object that references the source image.
sourcePoint
LeadPoint structure that contains the origin of the source rectangle. The width and height are the same width and height for the destination rectangle.
destinationRect
LeadRect structure that contains the destination rectangle.
opacity
Opacity value used when combining the areas from the source and affected images. This value is between 0 and 255.
Initializes a new AlphaBlendCommand class object with explicit parameters. Supported in Silverlight, Windows Phone 7

Syntax

Visual Basic (Declaration) 
Public Function New( _
   ByVal sourceImage As RasterImage, _
   ByVal sourcePoint As LeadPoint, _
   ByVal destinationRect As LeadRect, _
   ByVal opacity As Integer _
)
Visual Basic (Usage)Copy Code
Dim sourceImage As RasterImage
Dim sourcePoint As LeadPoint
Dim destinationRect As LeadRect
Dim opacity As Integer
 
Dim instance As New AlphaBlendCommand(sourceImage, sourcePoint, destinationRect, opacity)
C# 
public AlphaBlendCommand( 
   RasterImage sourceImage,
   LeadPoint sourcePoint,
   LeadRect destinationRect,
   int opacity
)
C++/CLI 
public:
AlphaBlendCommand( 
   RasterImage^ sourceImage,
   LeadPoint sourcePoint,
   LeadRect destinationRect,
   int opacity
)

Parameters

sourceImage
RasterImage object that references the source image.
sourcePoint
LeadPoint structure that contains the origin of the source rectangle. The width and height are the same width and height for the destination rectangle.
destinationRect
LeadRect structure that contains the destination rectangle.
opacity
Opacity value used when combining the areas from the source and affected images. This value is between 0 and 255.

Example

Run the AlphaBlendCommand on an image.

Visual BasicCopy Code
Public Sub AlphaBlendConstructorExample()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True

   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"))

   ' Prepare the command
   Dim srcImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ImageProcessingDemo\image3.cmp"), 24, CodecsLoadByteOrder.Bgr, 1, 1)

   Dim Left As Integer = CType((leadImage.Width / 8), Integer)
   Dim Top As Integer = CType((leadImage.Height / 8), Integer)
   Dim Width As Integer = CType(leadImage.Width, Integer)
   Dim Height As Integer = CType(leadImage.Height, Integer)

   ' Combine srcImage with image, with half opacity.
   Dim command As AlphaBlendCommand = New AlphaBlendCommand(srcImage, New LeadPoint(0, 0), New LeadRect(Left, Top, Width, Height), 128)
   command.Run(leadImage)
   codecs.Save(leadImage, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24)

End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
C#Copy Code
public void AlphaBlendConstructorExample()
   {
      // Load an image
      RasterCodecs codecs = new RasterCodecs();
      codecs.ThrowExceptionsOnInvalidImages = true;

      RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"));

      // Prepare the command
      RasterImage srcImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, @"ImageProcessingDemo\Image3.cmp"), 24, CodecsLoadByteOrder.Bgr, 1, 1);
      AlphaBlendCommand command = new AlphaBlendCommand(srcImage, new LeadPoint(0, 0), new LeadRect(image.Width / 8, image.Height / 8, image.Width, image.Height), 128);
      command.Run(image);
      codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24);

   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
SilverlightCSharpCopy Code
public void AlphaBlendConstructorExample(RasterImage image, RasterImage srcImage, Stream outStream)
{
   // Prepare the command
   AlphaBlendCommand command = new AlphaBlendCommand(srcImage, new LeadPoint(0, 0), new LeadRect(image.Width / 8, image.Height / 8, image.Width, image.Height), 128);
   command.Run(image);
   // Save result image
   RasterCodecs codecs = new RasterCodecs();
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24);
   image.Dispose();
   srcImage.Dispose();
}
SilverlightVBCopy Code
Public Sub AlphaBlendConstructorExample(ByVal image As RasterImage, ByVal srcImage As RasterImage, ByVal outStream As Stream)
   ' Prepare the command
   Dim command As AlphaBlendCommand = New AlphaBlendCommand(srcImage, New LeadPoint(0, 0), New LeadRect(image.Width / 8, image.Height / 8, image.Width, image.Height), 128)
   command.Run(image)
   ' Save result image
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24)
   image.Dispose()
   srcImage.Dispose()
End Sub

Requirements

Target Platforms: Silverlight 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)

See Also