AlphaBlendCommand Class

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

public class AlphaBlendCommand : Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

'Declaration
 
Public Class AlphaBlendCommand 
   Inherits Leadtools.ImageProcessing.RasterCommand
   Implements Leadtools.ImageProcessing.IRasterCommand

'Usage
 
Dim instance As AlphaBlendCommand

public sealed class AlphaBlendCommand : Leadtools.ImageProcessing.IRasterCommand

function Leadtools.ImageProcessing.Effects.AlphaBlendCommand()

public ref class AlphaBlendCommand : public Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

The opacity determines how much the affected image will show through the source image. For example, if the Opacity property (or the opacity parameter in the constructor) is set to 255 (completely opaque) then the source image will appear and the affected image will not show through the source image at all. If the opacity is 128 (half opacity), then the pixels for that area will consist of 50 percent from the source image and 50 percent from the affected image.
This command supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
This command does not support signed data images.
This command does not support 32-bit grayscale images.

For more information, refer to Introduction to Image Processing With LEADTOOLS.

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

Public Sub AlphaBlendCommandExample()
   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
   SrcImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ImageProcessingDemo\image3.cmp"), 4, CodecsLoadByteOrder.Bgr, 1, 1)

   Dim command As AlphaBlendCommand = New AlphaBlendCommand
   'Combine SrcImage with image, with half opacity.
   command.DestinationRectangle = New LeadRect(leadImage.Width \ 8, leadImage.Height \ 8, leadImage.Width, leadImage.Height)
   command.SourceImage = SrcImage
   command.Opacity = 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 AlphaBlendCommandExample()
   {
      // 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"), 4, CodecsLoadByteOrder.Bgr, 1, 1);

      AlphaBlendCommand command = new AlphaBlendCommand();
      //Combine SrcImage with image, with half opacity.
      command.DestinationRectangle = new LeadRect(image.Width / 8, image.Height / 8, image.Width, image.Height);
      command.SourceImage = SrcImage;
      command.Opacity = 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 AlphaBlendCommandExample()
{
   // 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();
   //Combine SrcImage with image, with half opacity.
   command.DestinationRectangle = LeadRectHelper.Create(image.Width / 8, image.Height / 8, image.Width, image.Height);
   command.SourceImage = SrcImage;
   command.Opacity = 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 AlphaBlendCommandExample(RasterImage image, RasterImage srcImage, Stream outStream)
{
   // Prepare the command
   AlphaBlendCommand command = new AlphaBlendCommand();
   //Combine SrcImage with image, with half opacity.
   command.DestinationRectangle = new LeadRect(image.Width / 8, image.Height / 8, image.Width, image.Height);
   command.SourceImage = srcImage;
   command.Opacity = 128;
   command.Run(image);
   // Save result image
   RasterCodecs codecs = new RasterCodecs();
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24);
   image.Dispose();
   srcImage.Dispose();
}

Public Sub AlphaBlendCommandExample(ByVal image As RasterImage, ByVal srcImage As RasterImage, ByVal outStream As Stream)
   ' Prepare the command
   Dim command As AlphaBlendCommand = New AlphaBlendCommand()
   'Combine SrcImage with image, with half opacity.
   command.DestinationRectangle = New LeadRect(image.Width / 8, image.Height / 8, image.Width, image.Height)
   command.SourceImage = srcImage
   command.Opacity = 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 Members
Leadtools.ImageProcessing.Effects Namespace
Introduction to Image Processing With LEADTOOLS
CombineCommand Class
FeatherAlphaBlendCommand Class
TextureAlphaBlendCommand Class
Leadtools.ImageProcessing.SpecialEffects.BricksTextureCommand
Leadtools.ImageProcessing.SpecialEffects.CanvasCommand
DisplacementCommand Class
Leadtools.ImageProcessing.SpecialEffects.FragmentCommand
Leadtools.ImageProcessing.SpecialEffects.VignnetCommand