PremultiplyAlphaValuesCommand Class

Converts the image data to or from premultiplied alpha values.

Object Model

Syntax

C#
Visual Basic
WinRT C#
Objective-C
Java
WinRT JavaScript
C++

public class PremultiplyAlphaValuesCommand : RasterCommand, IRasterCommand

'Declaration
 
Public Class PremultiplyAlphaValuesCommand 
   Inherits RasterCommand
   Implements IRasterCommand

'Usage
 
Dim instance As PremultiplyAlphaValuesCommand

public sealed class PremultiplyAlphaValuesCommand : IRasterCommand

@interface LTPremultiplyAlphaValuesCommand : LTRasterCommand

public class PremultiplyAlphaValuesCommand extends RasterCommand

function Leadtools.ImageProcessing.PremultiplyAlphaValuesCommand()

public ref class PremultiplyAlphaValuesCommand : public RasterCommand, IRasterCommand

Remarks

This command only works with images that are 32 or 64-bit bits per pixel.

Example

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

Copy Code

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;

      
public void PremultiplyAlphaValuesCommandExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName = Path.Combine(ImagesPath.Path, "LittleGFlyingAlpha.png");
   string destFileName = Path.Combine(ImagesPath.Path, "PremultiplyAlphaValuesCommand.bmp");

   // Load the source image from disk
   RasterImage image = codecs.Load(srcFileName);
   Debug.Assert(image.BitsPerPixel == 32);

   // Convert the image data to premultiplied alpha values
   PremultiplyAlphaValuesCommand cmd = new PremultiplyAlphaValuesCommand();
   cmd.ConvertToPremultipliedValues = true;
   cmd.Run(image);

   // Save the image back to disk
   codecs.Save(image, destFileName, RasterImageFormat.Bmp, 32);

   // Clean Up
   image.Dispose();
   codecs.Dispose();
}

Requirements

Target Platforms

Reference

PremultiplyAlphaValuesCommand Members
Leadtools.ImageProcessing Namespace