The RasterCommand class is the base class for all LEADTOOLS image processing commands.
public abstract class RasterCommand
Public MustInherit Class RasterCommand
@interface LTRasterCommand : NSObject
public abstract class RasterCommand
public ref class RasterCommand abstract
The RasterCommand class is the base class for all LEADTOOLS image processing commands.
This class contains functionality for dealing with running an image processing command, including progress status of the command.
This example runs two image processing commands on an image showing the progress percentage.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using LeadtoolsExamples.Common;
public void RasterCommandExample()
{
RasterCodecs codecs = new RasterCodecs();
string srcFileName = Path.Combine(ImagesPath.Path, "Image1.cmp");
string rotatedFileName = Path.Combine(ImagesPath.Path, "Image1_rotated.bmp");
string flippedFileName = Path.Combine(ImagesPath.Path, "Image1_flipped.bmp");
// Load the source image from disk
RasterImage image = codecs.Load(srcFileName);
// flip the image
FlipCommand flip = new FlipCommand(false);
RunCommand(image, flip);
// save the image
codecs.Save(image, flippedFileName, RasterImageFormat.Bmp, 24);
// rotate the image by 45 degrees
RotateCommand rotate = new RotateCommand();
rotate.Angle = 45 * 100;
rotate.FillColor = RasterColor.FromKnownColor(RasterKnownColor.White);
rotate.Flags = RotateCommandFlags.Resize;
RunCommand(image, rotate);
// save the image
codecs.Save(image, rotatedFileName, RasterImageFormat.Bmp, 24);
// clean up
image.Dispose();
codecs.Dispose();
}
bool cancelAt50;
void RunCommand(RasterImage image, RasterCommand command)
{
// subscribe to the progress event of the command
command.Progress += new EventHandler<RasterCommandProgressEventArgs>(command_Progress);
// if this is a flip command, we want to stop at 50 percent
cancelAt50 = command is FlipCommand;
// run the command
command.Run(image);
command.Progress -= new EventHandler<RasterCommandProgressEventArgs>(command_Progress);
}
void command_Progress(object sender, RasterCommandProgressEventArgs e)
{
// show the percentage
Console.WriteLine(e.Percent);
// check if we need to cancel the command at 50%
if (e.Percent == 50 && cancelAt50)
e.Cancel = true;
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Public Sub RasterCommandExample()
Dim codecs As RasterCodecs = New RasterCodecs()
Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")
Dim rotatedFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_rotated.bmp")
Dim flippedFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_flipped.bmp")
' Load the source image from disk
Dim image As RasterImage = codecs.Load(srcFileName)
' flip the image
Dim flip As FlipCommand = New FlipCommand(False)
RunCommand(image, flip)
' save the image
codecs.Save(image, flippedFileName, RasterImageFormat.Bmp, 24)
' rotate the image by 45 degrees
Dim rotate As RotateCommand = New RotateCommand()
rotate.Angle = 45 * 100
rotate.FillColor = RasterColor.FromKnownColor(RasterKnownColor.White)
rotate.Flags = RotateCommandFlags.Resize
RunCommand(image, rotate)
' save the image
codecs.Save(image, rotatedFileName, RasterImageFormat.Bmp, 24)
' clean up
image.Dispose()
End Sub
Private cancelAt50 As Boolean
Private Sub RunCommand(ByVal image As RasterImage, ByVal command As RasterCommand)
' subscribe to the progress event of the command
AddHandler command.Progress, AddressOf command_Progress
' if this is a flip command, we want to stop at 50 percent
cancelAt50 = TypeOf command Is FlipCommand
' run the command
command.Run(image)
RemoveHandler command.Progress, AddressOf command_Progress
End Sub
Private Sub command_Progress(ByVal sender As Object, ByVal e As RasterCommandProgressEventArgs)
' show the percentage
Console.WriteLine(e.Percent)
' check if we need to cancel the command at 50%
If e.Percent = 50 AndAlso cancelAt50 Then
e.Cancel = True
End If
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.Examples;
using Leadtools.ImageProcessing;
using Leadtools.Windows.Media;
public void RasterCommandExample(RasterImage image, Stream flippedStream, Stream rotatedStream)
{
RasterCodecs codecs = new RasterCodecs();
// flip the image
FlipCommand flip = new FlipCommand(false);
RunCommand(image, flip);
// save the image
codecs.Save(image, flippedStream, RasterImageFormat.Png, 24);
// rotate the image by 45 degrees
RotateCommand rotate = new RotateCommand();
rotate.Angle = 45 * 100;
rotate.FillColor = RasterColorConverter.FromColor(Colors.White);
rotate.Flags = RotateCommandFlags.Resize;
RunCommand(image, rotate);
// save the image
codecs.Save(image, rotatedStream, RasterImageFormat.Png, 24);
// clean up
image.Dispose();
}
bool cancelAt50;
void RunCommand(RasterImage image, IRasterCommand command)
{
// subscribe to the progress event of the command
command.Progress += new EventHandler<RasterCommandProgressEventArgs>(command_Progress);
// if this is a flip command, we want to stop at 50 percent
cancelAt50 = command is FlipCommand;
// run the command
command.Run(image);
command.Progress -= new EventHandler<RasterCommandProgressEventArgs>(command_Progress);
}
void command_Progress(object sender, RasterCommandProgressEventArgs e)
{
// show the percentage
Debug.WriteLine(e.Percent);
// check if we need to cancel the command at 50%
if (e.Percent == 50 && cancelAt50)
e.Cancel = true;
}
vb[Silverlight VB Example]
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.Windows.Media
Public Sub RasterCommandExample(ByVal image As RasterImage, ByVal flippedStream As Stream, ByVal rotatedStream As Stream)
Dim codecs As RasterCodecs = New RasterCodecs()
' flip the image
Dim flip As FlipCommand = New FlipCommand(False)
RunCommand(image, flip)
' save the image
codecs.Save(image, flippedStream, RasterImageFormat.Png, 24)
' rotate the image by 45 degrees
Dim rotate As RotateCommand = New RotateCommand()
rotate.Angle = 45 * 100
rotate.FillColor = RasterColorConverter.FromColor(Colors.White)
rotate.Flags = RotateCommandFlags.Resize
RunCommand(image, rotate)
' save the image
codecs.Save(image, rotatedStream, RasterImageFormat.Png, 24)
' clean up
image.Dispose()
End Sub
Private cancelAt50 As Boolean
Private Sub RunCommand(ByVal image As RasterImage, ByVal command As IRasterCommand)
' subscribe to the progress event of the command
AddHandler command.Progress, AddressOf command_Progress
' if this is a flip command, we want to stop at 50 percent
cancelAt50 = TypeOf command Is FlipCommand
' run the command
command.Run(image)
RemoveHandler command.Progress, AddressOf command_Progress
End Sub
Private Sub command_Progress(ByVal sender As Object, ByVal e As RasterCommandProgressEventArgs)
' show the percentage
Debug.WriteLine(e.Percent)
' check if we need to cancel the command at 50%
If e.Percent = 50 AndAlso cancelAt50 Then
e.Cancel = True
End If
End Sub
Help Collections
Raster .NET | C API | C++ Class Library | HTML5 JavaScript
Document .NET | C API | C++ Class Library | HTML5 JavaScript
Medical .NET | C API | C++ Class Library | HTML5 JavaScript
Medical Web Viewer .NET
Multimedia
Direct Show .NET | C API | Filters
Media Foundation .NET | C API | Transforms
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