AlphaBlendCommand Constructor(RasterImage,LeadPoint,LeadRect,Int32)

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public AlphaBlendCommand( 
   RasterImage sourceImage,
   LeadPoint sourcePoint,
   LeadRect destinationRect,
   int opacity
)

'Declaration
 
Public Function New( _
   ByVal sourceImage As RasterImage, _
   ByVal sourcePoint As LeadPoint, _
   ByVal destinationRect As LeadRect, _
   ByVal opacity As Integer _
)

'Usage
 
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)

public AlphaBlendCommand( 
   RasterImage sourceImage,
   LeadPoint sourcePoint,
   LeadRect destinationRect,
   int opacity
)

function AlphaBlendCommand( 
   sourceImage ,
   sourcePoint ,
   destinationRect ,
   opacity 
)

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.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

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

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";
}

[TestMethod]
public async Task AlphaBlendConstructorExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   // Load the image
   string srcFileName = @"Assets\Image1.cmp";
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   // Prepare the command
   srcFileName = @"Assets\Image3.cmp";
   loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   RasterImage srcImage = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   AlphaBlendCommand command = new AlphaBlendCommand(srcImage, LeadPointHelper.Create(0, 0), LeadRectHelper.Create(image.Width / 8, image.Height / 8, image.Width, image.Height), 128);
   command.Run(image);
   //Save as BMP
   string destFileName = @"result.bmp";
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName);
   await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Bmp, 24);
}

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();
}

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

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

AlphaBlendCommand Class
AlphaBlendCommand Members
Overload List