SetAlphaValuesCommand Class

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

public class SetAlphaValuesCommand : RasterCommand, IRasterCommand

'Declaration
 
Public Class SetAlphaValuesCommand 
   Inherits RasterCommand
   Implements IRasterCommand

'Usage
 
Dim instance As SetAlphaValuesCommand

public sealed class SetAlphaValuesCommand : IRasterCommand

@interface LTSetAlphaValuesCommand : LTRasterCommand

public class SetAlphaValuesCommand extends RasterCommand

function Leadtools.ImageProcessing.SetAlphaValuesCommand()

public ref class SetAlphaValuesCommand : public RasterCommand, IRasterCommand

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

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

Copy Code

Imports Leadtools
  Imports Leadtools.Codecs
  Imports Leadtools.ImageProcessing

  Public Sub SetAlphaValuesCommandExample()
   Dim codecs As RasterCodecs = New RasterCodecs()

   Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")
   Dim destFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "SetAlphaValuesCommand.bmp")

   ' Load the source image from disk
   Dim image As RasterImage = codecs.Load(srcFileName)

   ' Convert the image to 32-bits/pixel
   Dim colorResolution As ColorResolutionCommand = New ColorResolutionCommand(ColorResolutionCommandMode.InPlace, 32, RasterByteOrder.Bgr, RasterDitheringMethod.None, ColorResolutionCommandPaletteFlags.None, Nothing)
   colorResolution.Run(image)
   Debug.Assert(image.BitsPerPixel = 32)

   ' Set the alpha values
   Dim setAlphaValues As SetAlphaValuesCommand = New SetAlphaValuesCommand()
   setAlphaValues.Alpha = 128
   setAlphaValues.Run(image)

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

   ' Clean Up
   image.Dispose()
End Sub

  Public NotInheritable Class LEAD_VARS
  Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
  End Class

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

      
public void SetAlphaValuesCommandExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName = Path.Combine(ImagesPath.Path, "Image1.cmp");
   string destFileName = Path.Combine(ImagesPath.Path, "SetAlphaValuesCommand.bmp");

   // Load the source image from disk
   RasterImage image = codecs.Load(srcFileName);

   // Convert the image to 32-bits/pixel
   ColorResolutionCommand colorResolution = new ColorResolutionCommand(
      ColorResolutionCommandMode.InPlace,
      32,
      RasterByteOrder.Bgr,
      RasterDitheringMethod.None,
      ColorResolutionCommandPaletteFlags.None,
      null);
   colorResolution.Run(image);
   Assert.IsTrue(image.BitsPerPixel == 32);

   // Set the alpha values
   SetAlphaValuesCommand setAlphaValues = new SetAlphaValuesCommand();
   setAlphaValues.Alpha = 128;
   setAlphaValues.Run(image);

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

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

RasterCommandExamples.prototype.SetAlphaValuesCommandExample = function () {
    Tools.SetLicense();
    with (Leadtools) {
        with (Leadtools.Codecs) {
            with (Leadtools.ImageProcessing) {
                var codecs = new RasterCodecs();

                var srcFileName = "Assets\\Image1.cmp";
                var destFileName = "SetAlphaValuesCommand.bmp";
                var image;
                // Load the source image from disk
                return Tools.AppInstallFolder().getFileAsync(srcFileName).then(function (loadFile) {
                    return codecs.loadAsync(LeadStreamFactory.create(loadFile))
                })
            .then(function (img) {
                image = img;

                // Convert the image to 32-bits/pixel
                var colorResolution = new ColorResolutionCommand(
                   ColorResolutionCommandMode.inPlace,
                   32,
                   RasterByteOrder.bgr,
                   RasterDitheringMethod.none,
                   ColorResolutionCommandPaletteFlags.none,
                   null);
                colorResolution.run(image);
                console.assert(image.bitsPerPixel === 32, "image.bitsPerPixel == 32");

                // Set the alpha values
                setAlphaValues = new SetAlphaValuesCommand();
                setAlphaValues.alpha = 128;
                setAlphaValues.run(image);
                
                // Save the image back to disk
                return Tools.AppLocalFolder().createFileAsync(destFileName)})
                .then ( function ( saveFile ) {
                return codecs.saveAsync(image, LeadStreamFactory.create(saveFile), RasterImageFormat.bmp, 32)
            })
            .then(function () {
                // Clean Up
                image.close();
            });
            }
        }
    }
}

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

      
public async Task SetAlphaValuesCommandExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName = @"Assets\Image1.cmp";
   string destFileName = @"SetAlphaValuesCommand.bmp";

   // Load the source image from disk
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   // Convert the image to 32-bits/pixel
   ColorResolutionCommand colorResolution = new ColorResolutionCommand(
      ColorResolutionCommandMode.InPlace,
      32,
      RasterByteOrder.Bgr,
      RasterDitheringMethod.None,
      ColorResolutionCommandPaletteFlags.None,
      null);
   colorResolution.Run(image);
   Assert.IsTrue(image.BitsPerPixel == 32);

   // Set the alpha values
   SetAlphaValuesCommand setAlphaValues = new SetAlphaValuesCommand();
   setAlphaValues.Alpha = 128;
   setAlphaValues.Run(image);

   // Save the image back to disk
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName);
   await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Bmp, 32);

   // Clean Up
   image.Dispose();
}

using Leadtools;
using Leadtools.Codecs;
using Leadtools.Examples;
using Leadtools.ImageProcessing;
using Leadtools.Windows.Media;

public void SetAlphaValuesCommandExample(RasterImage image, Stream destStream)
{
   RasterCodecs codecs = new RasterCodecs();
   // Convert the image to 32-bits/pixel
   ColorResolutionCommand colorResolution = new ColorResolutionCommand(
      ColorResolutionCommandMode.InPlace,
      32,
      RasterByteOrder.Bgr,
      RasterDitheringMethod.None,
      ColorResolutionCommandPaletteFlags.None,
      null);
   colorResolution.Run(image);
   Debug.Assert(image.BitsPerPixel == 32);

   // Set the alpha values
   SetAlphaValuesCommand setAlphaValues = new SetAlphaValuesCommand();
   setAlphaValues.Alpha = 128;
   setAlphaValues.Run(image);

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

   // Clean Up
   image.Dispose();
}

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.Windows.Media

Public Sub SetAlphaValuesCommandExample(ByVal image As RasterImage, ByVal destStream As Stream)
   Dim codecs As RasterCodecs = New RasterCodecs()
   ' Convert the image to 32-bits/pixel
   Dim colorResolution As ColorResolutionCommand = New ColorResolutionCommand(ColorResolutionCommandMode.InPlace, 32, RasterByteOrder.Bgr, RasterDitheringMethod.None, ColorResolutionCommandPaletteFlags.None, Nothing)
   colorResolution.Run(image)
   Debug.Assert(image.BitsPerPixel = 32)

   ' Set the alpha values
   Dim setAlphaValues As SetAlphaValuesCommand = New SetAlphaValuesCommand()
   setAlphaValues.Alpha = 128
   setAlphaValues.Run(image)

   ' Save the image back to disk
   codecs.Save(image, destStream, RasterImageFormat.Bmp, 32)

   ' Clean Up
   image.Dispose()
End Sub

Target Platforms

Reference

SetAlphaValuesCommand Members
Leadtools.ImageProcessing Namespace