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AlphaBlendCommand Constructor(RasterImage,LeadPoint,LeadRect,int)

Summary

Initializes a new AlphaBlendCommand class object with explicit parameters.

Syntax
C#
VB
Objective-C
C++
Java
Public Function New( _ 
   ByVal sourceImage As RasterImage, _ 
   ByVal sourcePoint As LeadPoint, _ 
   ByVal destinationRect As LeadRect, _ 
   ByVal opacity As Integer _ 
) 
- (instancetype)initWithSourceImage:(LTRasterImage *)sourceImage 
                        sourcePoint:(LeadPoint)sourcePoint 
                    destinationRect:(LeadRect)destinationRect 
                            opacity:(NSInteger)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.

Example

Run the AlphaBlendCommand on an image.

C#
VB
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Effects; 
 
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"; 
} 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Effects 
 
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#[Silverlight C# Example] 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Effects; 
using Leadtools.Examples; 
 
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(); 
} 
vb[Silverlight VB Example] 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Effects 
 
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

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Leadtools.ImageProcessing.Effects Assembly