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LEADTOOLS WPF and Silverlight (Leadtools.Windows.Controls assembly)
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UpdateImageFromSource Method (RasterImageBox)






Leadtools.Windows.Controls Namespace > RasterImageBox Class : UpdateImageFromSource Method
Converts the WPF/Silverlight image in the Source property to the LEADTOOLS Leadtools.RasterImage and set it in Image.
Syntax
public virtual void UpdateImageFromSource()
'Declaration
 
Public Overridable Sub UpdateImageFromSource() 
'Usage
 
Dim instance As RasterImageBox
 
instance.UpdateImageFromSource()

            

        

            

            

            

        

            

            
public:
virtual void UpdateImageFromSource(); 

            

        

            

        
            
            
            

            
            
            
            
Remarks
If the Source property is changed, the RasterImageBox must be informed so it can reflect the changes into the Image object. The UpdateImageFromSource can be used to perform this task.



The control uses the RasterImageConverter.ConvertFromSource to convert the WPF/Silverlight System.Windows.Media.ImageSource to LEADTOOLS Leadtools.RasterImage. The value of the ConvertFromSourceOptions property is used as the options parameter to this method.

          
            
            
Example

    

            
            

            Copy Code
                
            

            

    

     

            
Imports Leadtools.Windows.Controls
Imports Leadtools.ImageProcessing
Imports Leadtools.Codecs
Imports Leadtools

Public Sub ImageViewer_UpdateImageFromSource(ByVal viewer As RasterImageBox)
   Dim bitmapImage As BitmapImage = New BitmapImage(New Uri(Path.Combine(LEAD_VARS.ImagesDir, "cannon.jpg")))
   'Convert to Bgr32a
   Dim convertedBitmap As FormatConvertedBitmap = New FormatConvertedBitmap(bitmapImage, PixelFormats.Bgra32, Nothing, 1)

   viewer.Source = New WriteableBitmap(convertedBitmap)

   Dim writeableBitmap As WriteableBitmap = TryCast(viewer.Source, WriteableBitmap)

   Dim pixels As Integer() = New Integer(writeableBitmap.PixelWidth * writeableBitmap.PixelHeight - 1) {}
   Dim stride As Integer = writeableBitmap.PixelWidth * 4

   writeableBitmap.CopyPixels(pixels, stride, 0)

   ' Fill the bitmap with Red.
   Dim i As Integer = 0
   Do While i < writeableBitmap.PixelWidth
      Dim j As Integer = 0
      Do While j < writeableBitmap.PixelHeight
         Dim color_data As Integer = (255 << 24) Or (0 << 16) Or (0 << 8) Or 0
         Dim pos As Integer = i + j * writeableBitmap.PixelWidth
         pixels(pos) = color_data
         j += 1
      Loop
      i += 1
   Loop

   Dim sourceRect As Int32Rect = New Int32Rect(0, 0, writeableBitmap.PixelWidth, writeableBitmap.PixelHeight)
   writeableBitmap.WritePixels(sourceRect, pixels, stride, 0)

   viewer.UpdateImageFromSource()
End Sub

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

            

   

     

            
using Leadtools.Help;
using Leadtools.Windows.Controls;
using Leadtools.ImageProcessing;
using Leadtools.Codecs;

public void ImageViewer_UpdateImageFromSource(RasterImageBox viewer)
{
   BitmapImage bitmapImage = new BitmapImage(new Uri(Path.Combine(LEAD_VARS.ImagesDir, "cannon.jpg")));
   //Convert to Bgr32a
   FormatConvertedBitmap convertedBitmap = new FormatConvertedBitmap(bitmapImage, PixelFormats.Bgra32, null, 1);

   viewer.Source = new WriteableBitmap(convertedBitmap);

   WriteableBitmap writeableBitmap = viewer.Source as WriteableBitmap;

   int[] pixels = new int[writeableBitmap.PixelWidth * writeableBitmap.PixelHeight];
   int stride = writeableBitmap.PixelWidth * 4;

   writeableBitmap.CopyPixels(pixels, stride, 0);

   // Fill the bitmap with Red.
   for (int i = 0; i < writeableBitmap.PixelWidth; ++i)
   {
      for (int j = 0; j < writeableBitmap.PixelHeight; ++j)
      {
         int color_data = (255 << 24) | (0 << 16) | (0 << 8) | 0;
         int pos = i + j * writeableBitmap.PixelWidth;
         pixels[pos] = color_data;
      }
   }

   Int32Rect sourceRect = new Int32Rect(0, 0, writeableBitmap.PixelWidth, writeableBitmap.PixelHeight);
   writeableBitmap.WritePixels(sourceRect, pixels, stride, 0);

   viewer.UpdateImageFromSource();
}

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

            

   

     

            
using Leadtools.Help;
using Leadtools.Windows.Controls;
using Leadtools.ImageProcessing;
using Leadtools.Codecs;

public void ImageViewer_UpdateImageFromSource(RasterImageBox viewer)
{
   RasterCodecs codecs = new RasterCodecs();
   RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "cannon.jpg");
   //Convert to Bgr32a
   ColorResolutionCommand cmd = new ColorResolutionCommand(ColorResolutionCommandMode.InPlace, 32, RasterByteOrder.Bgr, RasterDitheringMethod.None, ColorResolutionCommandPaletteFlags.None, null);
   cmd.Run(image);

   Stream stream = new MemoryStream();
   codecs.Save(image, stream, RasterImageFormat.Bmp, image.BitsPerPixel);
   BitmapImage imgSource = new BitmapImage();
   imgSource.SetSource(stream);
   viewer.Source = imgSource;

   WriteableBitmap writeableBitmap = viewer.Source as WriteableBitmap;

   int[] pixels = new int[writeableBitmap.PixelWidth * writeableBitmap.PixelHeight];
   int stride = writeableBitmap.PixelWidth * 4;

   Array.Copy(writeableBitmap.Pixels, pixels, stride);

   // Fill the bitmap with Red.
   for (int i = 0; i < writeableBitmap.PixelWidth; ++i)
   {
      for (int j = 0; j < writeableBitmap.PixelHeight; ++j)
      {
         int color_data = (255 << 24) | (0 << 16) | (0 << 8) | 0;
         int pos = i + j * writeableBitmap.PixelWidth;
         pixels[pos] = color_data;
      }
   }

   Array.Copy(pixels, writeableBitmap.Pixels, stride);
   viewer.UpdateImageFromSource();
}

            

   

     

            
Imports Leadtools
Imports Leadtools.Windows.Controls
Imports Leadtools.ImageProcessing
Imports Leadtools.Codecs

Public Sub ImageViewer_UpdateImageFromSource(ByVal viewer As RasterImageBox)
   Dim codecs As RasterCodecs = New RasterCodecs()
   Dim image As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path & "cannon.jpg")
   'Convert to Bgr32a
   Dim cmd As ColorResolutionCommand = New ColorResolutionCommand(ColorResolutionCommandMode.InPlace, 32, RasterByteOrder.Bgr, _
                                                                  RasterDitheringMethod.None, ColorResolutionCommandPaletteFlags.None, Nothing)
   cmd.Run(image)

   Dim stream As Stream = New MemoryStream()
   codecs.Save(image, stream, RasterImageFormat.Bmp, image.BitsPerPixel)
   Dim imgSource As BitmapImage = New BitmapImage()
   imgSource.SetSource(stream)
   viewer.Source = imgSource

   Dim writeableBitmap As WriteableBitmap = TryCast(viewer.Source, WriteableBitmap)

   Dim pixels As Integer() = New Integer(writeableBitmap.PixelWidth * writeableBitmap.PixelHeight - 1) {}
   Dim stride As Integer = writeableBitmap.PixelWidth * 4

   Array.Copy(writeableBitmap.Pixels, pixels, stride)

   ' Fill the bitmap with Red.
   Dim i As Integer = 0
   Do While i < writeableBitmap.PixelWidth
      Dim j As Integer = 0
      Do While j < writeableBitmap.PixelHeight
         Dim color_data As Integer = (255 << 24) Or (0 << 16) Or (0 << 8) Or 0
         Dim pos As Integer = i + j * writeableBitmap.PixelWidth
         pixels(pos) = color_data
         j += 1
      Loop
      i += 1
   Loop

   Array.Copy(pixels, writeableBitmap.Pixels, stride)
   viewer.UpdateImageFromSource()
End Sub

            

   

      
	
      
	
    

            
            
Requirements
Target Platforms

            
            
See Also
Reference
RasterImageBox Class

RasterImageBox Members




        
    

	
    

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