RasterCodecs Class

Summary

Provides support for loading and saving raster image files.

Syntax

Objective-C

C++

Java

public class RasterCodecs : IDisposable

Public Class RasterCodecs  
   Implements System.IDisposable

@interface LTRasterCodecs : NSObject

public class RasterCodecs

public ref class RasterCodecs : public System.IDisposable

Remarks

LEADTOOLS provides many options for loading and saving image files.

Whether an image file is on disk or in memory, you can get information about the image before loading it. You can also handle file-format-specific information, such as the page number or physical resolution.

You can supply the input for a load operation or the output of a save operation, and you can add processing, such as a paint-while-load feature.

You can create as many instances of the RasterCodecs class as desired. However, you should not pass a RasterCodecs object created in one thread to another. Instead, create another instance of RasterCodecs in the thread. If desired, you can copy the options from one RasterCodecs object to another by cloning the options from the source RasterCodecs using CodecsOptions.Clone and setting in the destination object Options property.

The RasterCodecs.SaveOptions and RasterCodecs.LoadOptions methods can be used to save or load the current options to a disk file or a stream.

Example

This example loads an existing image file and re-saves it in another format.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
using LeadtoolsExamples.Common; 
 
public void RasterCodecsExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
   string dstFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_test.jpg"); 
 
   RasterImage image = codecs.Load(srcFileName); 
   codecs.Save(image, dstFileName, RasterImageFormat.Jpeg, 0); 
 
   // Clean up 
   image.Dispose(); 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing 
Imports Leadtools.ImageProcessing.Color 
Imports Leadtools.Drawing 
Imports Leadtools.Svg 
 
Public Sub RasterCodecsExample() 
   Dim codecs As RasterCodecs = New RasterCodecs() 
 
   Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp") 
   Dim dstFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_test.jpg") 
 
   Dim image As RasterImage = codecs.Load(srcFileName) 
   codecs.Save(image, dstFileName, RasterImageFormat.Jpeg, 0) 
 
   ' Clean up 
   image.Dispose() 
   codecs.Dispose() 
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.ImageProcessing.Color; 
using Leadtools.Windows.Media; 
 
public void RasterCodecsExample(Stream inStream, Stream outStream) 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   RasterImage image = codecs.Load(inStream); 
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 0); 
 
   // Clean up 
   image.Dispose(); 
} 
vb[Silverlight VB Example] 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing 
Imports Leadtools.ImageProcessing.Color 
Imports Leadtools.Windows.Media 
 
Public Sub RasterCodecsExample(ByVal inStream As Stream, ByVal outStream As Stream) 
   Dim codecs As RasterCodecs = New RasterCodecs() 
 
   Dim image As RasterImage = codecs.Load(inStream) 
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 0) 
 
   ' Clean up 
   image.Dispose() 
End Sub