ResizeCommand Class

Resizes the image from an existing image, and puts the resized image into a destination image, leaving the original image intact.

Object Model

Syntax

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

public class ResizeCommand : RasterCommand, IRasterCommand

'Declaration
 
Public Class ResizeCommand 
   Inherits RasterCommand
   Implements IRasterCommand

'Usage
 
Dim instance As ResizeCommand

public sealed class ResizeCommand : IRasterCommand

function Leadtools.ImageProcessing.ResizeCommand()

public ref class ResizeCommand : public RasterCommand, IRasterCommand

Remarks

The ResizeCommand command works by resizing the image data passed to the RasterCommand.Run method into the image passed to the DestinationImage property.

The destination image must be initialized with the correct RasterImage.Width and RasterImage.Height of the new, resized image.

This command does not change the source image passed to the RasterCommand.Run method. If you want to resize an image without creating a new version, use the SizeCommand.

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

Example

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

Public Sub ResizeCommandExample()
      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, "ResizeCommand.bmp")

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

      ' Create the destination image
      Dim destImage As RasterImage = New RasterImage(RasterMemoryFlags.Conventional, 100, 100, srcImage.BitsPerPixel, srcImage.Order, srcImage.ViewPerspective, srcImage.GetPalette(), IntPtr.Zero, 0)

      ' Resize the source image into the destination image
      Dim command As ResizeCommand = New ResizeCommand()
      command.DestinationImage = destImage
      command.Flags = RasterSizeFlags.Bicubic
      command.Run(srcImage)

      ' Save it to disk
      codecs.Save(destImage, destFileName, RasterImageFormat.Bmp, 24)

      ' Clean Up
      srcImage.Dispose()
      destImage.Dispose()
   End Sub

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

public void ResizeCommandExample()
   {
      RasterCodecs codecs = new RasterCodecs();

      string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
      string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "ResizeCommand.bmp");

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

      // Create the destination image
      RasterImage destImage = new RasterImage(
         RasterMemoryFlags.Conventional,
         100,
         100,
         srcImage.BitsPerPixel,
         srcImage.Order,
         srcImage.ViewPerspective,
         srcImage.GetPalette(),
         IntPtr.Zero,
         0);

      // Resize the source image into the destination image
      ResizeCommand command = new ResizeCommand();
      command.DestinationImage = destImage;
      command.Flags = RasterSizeFlags.Bicubic;
      command.Run(srcImage);

      // Save it to disk
      codecs.Save(destImage, destFileName, RasterImageFormat.Bmp, 24);

      // Clean Up
      srcImage.Dispose();
      destImage.Dispose();
   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

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

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

                    // Create the destination image
                    destImage = new RasterImage(
                       RasterMemoryFlags.conventional,
                       100,
                       100,
                       srcImage.bitsPerPixel,
                       srcImage.order,
                       srcImage.viewPerspective,
                       srcImage.getPalette());

                    // Resize the source image into the destination image
                    var command = new ResizeCommand();
                    command.destinationImage = destImage;
                    command.flags = RasterSizeFlags.bicubic;
                    command.run(srcImage);

                    // Save it to disk
                    return Tools.AppLocalFolder().createFileAsync(destFileName)
                })
            .then(function (saveFile) {
                return codecs.saveAsync(destImage, LeadStreamFactory.create(saveFile), RasterImageFormat.bmp, 24)
            })
            .then(function () {

                // Clean Up
                srcImage.close();
                destImage.close();
            });
            }
        }
    }
}

[TestMethod]
public async Task ResizeCommandExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName = @"Assets\Image1.cmp";
   string destFileName = @"ResizeCommand.bmp";

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

   // Create the destination image
   RasterImage destImage = new RasterImage(
      RasterMemoryFlags.Conventional,
      100,
      100,
      srcImage.BitsPerPixel,
      srcImage.Order,
      srcImage.ViewPerspective,
      srcImage.GetPalette());

   // Resize the source image into the destination image
   ResizeCommand command = new ResizeCommand();
   command.DestinationImage = destImage;
   command.Flags = RasterSizeFlags.Bicubic;
   command.Run(srcImage);

   // Save it to disk
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName);
   await codecs.SaveAsync(destImage, LeadStreamFactory.Create(saveFile), RasterImageFormat.Bmp, 24);

   // Clean Up
   srcImage.Dispose();
   destImage.Dispose();
}

public void ResizeCommandExample(RasterImage srcImage, Stream destStream)
{
   RasterCodecs codecs = new RasterCodecs();
   // Create the destination image
   RasterImage destImage = new RasterImage(
      RasterMemoryFlags.Conventional,
      100,
      100,
      srcImage.BitsPerPixel,
      srcImage.Order,
      srcImage.ViewPerspective,
      srcImage.GetPalette(),
      null,
      0);

   // Resize the source image into the destination image
   ResizeCommand command = new ResizeCommand();
   command.DestinationImage = destImage;
   command.Flags = RasterSizeFlags.Bicubic;
   command.Run(srcImage);

   // Save it to disk
   codecs.Save(destImage, destStream, RasterImageFormat.Bmp, 24);

   // Clean Up
   srcImage.Dispose();
   destImage.Dispose();
}

Public Sub ResizeCommandExample(ByVal srcImage As RasterImage, ByVal destStream As Stream)
   Dim codecs As RasterCodecs = New RasterCodecs()
   ' Create the destination image
   Dim destImage As RasterImage = New RasterImage(RasterMemoryFlags.Conventional, 100, 100, srcImage.BitsPerPixel, srcImage.Order, srcImage.ViewPerspective, srcImage.GetPalette(), Nothing, 0)

   ' Resize the source image into the destination image
   Dim command As ResizeCommand = New ResizeCommand()
   command.DestinationImage = destImage
   command.Flags = RasterSizeFlags.Bicubic
   command.Run(srcImage)

   ' Save it to disk
   codecs.Save(destImage, destStream, RasterImageFormat.Bmp, 24)

   ' Clean Up
   srcImage.Dispose()
   destImage.Dispose()
End Sub

Requirements

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

ResizeCommand Members
Leadtools.ImageProcessing Namespace