LEADTOOLS Image File Support (Leadtools.Codecs assembly)

SaveStampAsync(RasterImage,ILeadStream) Method

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Leadtools.Codecs Namespace > RasterCodecs Class > SaveStampAsync Method : SaveStampAsync(RasterImage,ILeadStream) Method
The Leadtools.RasterImage object that contain the thumbnail (stamp) image.
A Leadtools.ILeadStream containing the data of an existing image file.
Saves a stamp in an existing file with specific options.
Syntax
public IAsyncAction SaveStampAsync( 
   RasterImage image,
   ILeadStream stream
)
'Declaration
 
Public Overloads Function SaveStampAsync( _
   ByVal image As RasterImage, _
   ByVal stream As ILeadStream _
) As IAsyncAction
'Usage
 
Dim instance As RasterCodecs
Dim image As RasterImage
Dim stream As ILeadStream
Dim value As IAsyncAction
 
value = instance.SaveStampAsync(image, stream)
public IAsyncAction SaveStampAsync( 
   RasterImage image,
   ILeadStream stream
)

            

        

            

            

            

        

            

            
 function Leadtools.Codecs.RasterCodecs.SaveStampAsync(RasterImage,ILeadStream)( 
   image ,
   stream 
)


            

        

            

            
public:
IAsyncAction^ SaveStampAsync( 
   RasterImage^ image,
   ILeadStream^ stream
) 

            

        

            

        
            
Parameters
image


The Leadtools.RasterImage object that contain the thumbnail (stamp) image.
stream


A Leadtools.ILeadStream containing the data of an existing image file.

            
            
Return Value
An asynchronous save operation on a RasterCodecs object.

            
            
            
            
Remarks
The stamp will be written to last page in the file. If that page already has a stamp, it will be overwritten; If the file to which the stamp is being written does not exist, an exception will occur.



This method works for regular JPEG files and Exif JPEG files. For regular JPEG files, the stamp saved is always uncompressed and can be 8 or 24 bits per pixel. The stamp can be any width and height, but the stamp data and stamp header must completely fit in an APP0 marker. Therefore, the size must be less than 64k bytes (0xFFFF).



For Exif JPEG files, the stamps can be uncompressed or JPEG compressed and must be 24 bits per pixel. Exif JPEG stamps are supposed to be 160 x 120. However, LEADTOOLS can save and read Exif JPEG stamps of other dimensions. The stamp, along with other information such as the TIFF_HEADER, 0th IFD, 1st IFD, etc. must completely fit in an APP1 marker. Therefore, the size must be less than 64k bytes (0xFFFF).



NOTE: At this time, there are no multipage formats that support stamps.

            
            
            
Example

    

            
            

            Copy Code
                
            

            

    

     

            
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Drawing

Public Sub StampExample()
   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, "Image1_WithCustomStamp.cmp")
   Dim stampFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1_Stamp.bmp")

   ' Load the source file name
   Dim image As RasterImage = codecs.Load(srcFileName)

   ' Save as the destination image
   codecs.Save(image, destFileName, RasterImageFormat.Cmp, 24)

   ' Resize the image to fit into 128 by 128 pixels keeping the aspect ratio
   Dim rc As LeadRect = New LeadRect(0, 0, 128, 128)
   rc = RasterImage.CalculatePaintModeRectangle(image.ImageWidth, image.ImageHeight, rc, RasterPaintSizeMode.FitAlways, RasterPaintAlignMode.Near, RasterPaintAlignMode.Near)

   Dim command As SizeCommand = New SizeCommand()
   command.Width = rc.Width
   command.Height = rc.Height
   command.Flags = RasterSizeFlags.None
   command.Run(image)

   ' Add the word "Stamp" on the image at the middle
   Dim message As String = "Stamp"

   Using rg As RasterGraphics = RasterImagePainter.CreateGraphics(image)
      Using sf As New System.Drawing.StringFormat()
         sf.Alignment = System.Drawing.StringAlignment.Center
         sf.LineAlignment = System.Drawing.StringAlignment.Center
         Using f As New System.Drawing.Font("Arial", 20, System.Drawing.FontStyle.Bold)
            Dim rcDraw As New System.Drawing.Rectangle(rc.X, rc.Y, rc.Width, rc.Height)
            rg.Graphics.DrawString(message, f, System.Drawing.Brushes.Yellow, rcDraw, sf)
         End Using
      End Using
   End Using

   ' Now set this image as the stamp for this file
   codecs.SaveStamp(image, destFileName, 1, 1, 1, CodecsSavePageMode.Overwrite)
   image.Dispose()

   ' Load the stamp from the file and save it into another file
   image = codecs.ReadStamp(destFileName, 1)
   codecs.Save(image, stampFileName, RasterImageFormat.Bmp, 24)
   image.Dispose()

   ' Clean up
   codecs.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;
using Leadtools.ImageProcessing.Color;

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

   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
   string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_WithCustomStamp.cmp");
   string stampFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_Stamp.bmp");

   // Load the source file name
   RasterImage image = codecs.Load(srcFileName);

   // Save as the destination image
   codecs.Save(image, destFileName, RasterImageFormat.Cmp, 24);

   // Resize the image to fit into 128 by 128 pixels keeping the aspect ratio
   LeadRect rc = new LeadRect(0, 0, 128, 128);
   rc = RasterImage.CalculatePaintModeRectangle(
      image.ImageWidth,
      image.ImageHeight,
      rc,
      RasterPaintSizeMode.FitAlways,
      RasterPaintAlignMode.Near,
      RasterPaintAlignMode.Near);

   SizeCommand command = new SizeCommand();
   command.Width = rc.Width;
   command.Height = rc.Height;
   command.Flags = RasterSizeFlags.None;
   command.Run(image);

   // Add the word "Stamp" on the image at the middle
   string message = "Stamp";

   using (Leadtools.Drawing.RasterGraphics rg = Leadtools.Drawing.RasterImagePainter.CreateGraphics(image))
   {
      using (System.Drawing.StringFormat sf = new System.Drawing.StringFormat())
      {
         sf.Alignment = System.Drawing.StringAlignment.Center;
         sf.LineAlignment = System.Drawing.StringAlignment.Center;
         using (System.Drawing.Font f = new System.Drawing.Font("Arial", 20, System.Drawing.FontStyle.Bold))
         {
            System.Drawing.Rectangle rcDraw = new System.Drawing.Rectangle(rc.X, rc.Y, rc.Width, rc.Height);
            rg.Graphics.DrawString(message, f, System.Drawing.Brushes.Yellow, rcDraw, sf);
         }
      }
   }

   // Now set this image as the stamp for this file
   codecs.SaveStamp(image, destFileName, 1, 1, 1, CodecsSavePageMode.Overwrite);
   image.Dispose();

   // Load the stamp from the file and save it into another file
   image = codecs.ReadStamp(destFileName, 1);
   codecs.Save(image, stampFileName, RasterImageFormat.Bmp, 24);
   image.Dispose();

   // Clean up
   codecs.Dispose();
}

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

            

   

     

            
RasterCodecsExamples.prototype.StampExample = function ( ) 
{
   Tools.SetLicense ( ) ;
   with (Leadtools) {
      with (Leadtools.Codecs) {
         var codecs = new RasterCodecs();

         var srcFileName = "Assets\\Image1.cmp";
         var destFileName = "Image1_WithCustomStamp.cmp";
         var stampFileName = "Image1_Stamp.bmp";
         var image;
         var saveFile;
         // Load the source file name
         return Tools.AppInstallFolder().getFileAsync(srcFileName).then(function (loadFile) {
            return codecs.loadAsync(LeadStreamFactory.create(loadFile))
         })
         .then(function (img) {
            image = img;

            // Save as the destination image
            return Tools.AppLocalFolder().createFileAsync(destFileName)
         })
         .then(function (saveFileX) {
            saveFile = saveFileX;
            return codecs.saveAsync(image, LeadStreamFactory.create(saveFile), RasterImageFormat.cmp, 24)
         })
         .then(function () {

            // Resize the image to fit into 128 by 128 pixels keeping the aspect ratio
            var rc = LeadRectHelper.create(0, 0, 128, 128);
            rc = RasterImage.calculatePaintModeRectangle(
               image.imageWidth,
               image.imageHeight,
               rc,
               RasterPaintSizeMode.fitAlways,
               RasterPaintAlignMode.near,
               RasterPaintAlignMode.near);

            var command = new Leadtools.ImageProcessing.SizeCommand();
            command.width = rc.width;
            command.height = rc.height;
            command.flags = RasterSizeFlags.none;
            command.run(image);

            // Now set this image as the stamp for this file
            return Tools.AppLocalFolder().getFileAsync(destFileName)
         })
         .then(function (saveFile) {
            return codecs.saveStampAsync(image, LeadStreamFactory.create(saveFile), 1, 1, 1, CodecsSavePageMode.overwrite)
         })
         .then(function () {
            image.close();

            // Load the stamp from the file and save it into another file
            return codecs.readStampAsync(LeadStreamFactory.create(saveFile), 1)
         })
         .then(function (img) {
            image = img;
            return Tools.AppLocalFolder().createFileAsync(stampFileName)
         })
         .then(function (saveFile) {
            return codecs.saveAsync(image, LeadStreamFactory.create(saveFile), RasterImageFormat.bmp, 24)
         })
         .then(function () {
            image.close();

            // Clean up
            codecs.close();
         });
      }
   }
}

            

   

     

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

      
public async Task StampExample()
{
   RasterCodecs codecs = new RasterCodecs();
   string srcFileName = @"Assets\Image1.cmp";
   string destFileName = @"Image1_WithCustomStamp.cmp";
   string stampFileName = @"Image1_Stamp.bmp";

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

   // Save as the destination image
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName);
   await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Cmp, 24);

   // Resize the image to fit into 128 by 128 pixels keeping the aspect ratio
   LeadRect rc = LeadRectHelper.Create(0, 0, 128, 128);
   rc = RasterImage.CalculatePaintModeRectangle(
      image.ImageWidth,
      image.ImageHeight,
      rc,
      RasterPaintSizeMode.FitAlways,
      RasterPaintAlignMode.Near,
      RasterPaintAlignMode.Near);

   SizeCommand command = new SizeCommand();
   command.Width = rc.Width;
   command.Height = rc.Height;
   command.Flags = RasterSizeFlags.None;
   command.Run(image);

   // Now set this image as the stamp for this file
   saveFile = await Tools.AppLocalFolder.GetFileAsync(destFileName);
   await codecs.SaveStampAsync(image, LeadStreamFactory.Create(saveFile), 1, 1, 1, CodecsSavePageMode.Overwrite);
   image.Dispose();

   // Load the stamp from the file and save it into another file
   image = await codecs.ReadStampAsync(LeadStreamFactory.Create(saveFile), 1);
   saveFile = await Tools.AppLocalFolder.CreateFileAsync(stampFileName);
   await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Bmp, 24);
   image.Dispose();

   // Clean up
   codecs.Dispose();
}

            

   

     

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

private void StampExample(RasterImage image, Stream outStreamFileWithStamp, Stream outStreamStampOnly)
{
   RasterCodecs codecs = new RasterCodecs();
   // Save as the destination image
   codecs.Save(image, outStreamFileWithStamp, RasterImageFormat.Cmp, 24);

   // Resize the image to fit into 128 by 128 pixels keeping the aspect ratio
   LeadRect rc = new LeadRect(0, 0, 128, 128);
   rc = RasterImage.CalculatePaintModeRectangle(
      image.ImageWidth,
      image.ImageHeight,
      rc,
      RasterPaintSizeMode.FitAlways,
      RasterPaintAlignMode.Near,
      RasterPaintAlignMode.Near);

   SizeCommand command = new SizeCommand();
   command.Width = rc.Width;
   command.Height = rc.Height;
   command.Flags = RasterSizeFlags.None;
   command.Run(image);

   // Add the word "Stamp" on the image at the middle
   string message = "Stamp";

   // To add "Stamp", we will create a WriteableBitmap from the RasterImage
   // then add a canvas and a text block on top of it

   // Create a writeable bitmap from the image source
   WriteableBitmap bitmap = new WriteableBitmap(image.ImageWidth, image.ImageHeight);

   // The white background canvas
   Canvas canvas = new Canvas();
   canvas.Width = image.ImageWidth;
   canvas.Height = image.ImageHeight;

   // Get the RasterImage as an ImageSource
   ImageSource source = RasterImageConverter.ConvertToSource(image, ConvertToSourceOptions.UseSetSource);

   // The image for the ImageSource
   Image img = new Image();
   img.Source = source;

   // The black text block
   TextBlock textBlock = new TextBlock();
   textBlock.FontFamily = new FontFamily("Arial");
   textBlock.FontSize = 20;
   textBlock.Text = message;
   textBlock.Foreground = new SolidColorBrush(Color.FromArgb(255, 0, 0, 0));

   // Add the image source and the text block
   canvas.Children.Add(img);
   canvas.Children.Add(textBlock);

   // Center the text
   double left = (canvas.Width - textBlock.ActualWidth) / 2;
   double top = (canvas.Height - textBlock.ActualHeight) / 2;
   textBlock.SetValue(Canvas.LeftProperty, left);
   textBlock.SetValue(Canvas.TopProperty, top);

   // Render
   bitmap.Render(canvas, null);
   bitmap.Invalidate();

   image.Dispose();

   // Re-create the RasterImage from the WriteableBitmap
   image = RasterImageConverter.ConvertFromSource(bitmap, ConvertFromSourceOptions.None);

   // stamp has to be 24-bit, so convert it back
   ColorResolutionCommand cmd = new ColorResolutionCommand();
   cmd.BitsPerPixel = 24;
   cmd.Run(image);

   // This image contains the stamp, save it to the output stream
   codecs.SaveStamp(image, outStreamFileWithStamp);
   image.Dispose();

   // Load the stamp from the file and save it to the other output stream
   image = codecs.ReadStamp(outStreamFileWithStamp, 1);
   codecs.Save(image, outStreamStampOnly, RasterImageFormat.Bmp, 24);
   image.Dispose();
}

            

   

     

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

Private Sub StampExample(ByVal image As RasterImage, ByVal outStreamFileWithStamp As Stream, ByVal outStreamStampOnly As Stream)
   Dim codecs As RasterCodecs = New RasterCodecs()
   ' Save as the destination image
   codecs.Save(image, outStreamFileWithStamp, RasterImageFormat.Cmp, 24)

   ' Resize the image to fit into 128 by 128 pixels keeping the aspect ratio
   Dim rc As LeadRect = New LeadRect(0, 0, 128, 128)
   rc = RasterImage.CalculatePaintModeRectangle(image.ImageWidth, image.ImageHeight, rc, RasterPaintSizeMode.FitAlways, RasterPaintAlignMode.Near, RasterPaintAlignMode.Near)

   Dim command As SizeCommand = New SizeCommand()
   command.Width = rc.Width
   command.Height = rc.Height
   command.Flags = RasterSizeFlags.None
   command.Run(image)

   ' Add the word "Stamp" on the image at the middle
   Dim message As String = "Stamp"

   ' To add "Stamp", we will create a WriteableBitmap from the RasterImage
   ' then add a canvas and a text block on top of it

   ' Create a writeable bitmap from the image source
   Dim bitmap As WriteableBitmap = New WriteableBitmap(image.ImageWidth, image.ImageHeight)

   ' The white background canvas
   Dim canvas As Canvas = New Canvas()
   canvas.Width = image.ImageWidth
   canvas.Height = image.ImageHeight

   ' Get the RasterImage as an ImageSource
   Dim source As ImageSource = RasterImageConverter.ConvertToSource(image, ConvertToSourceOptions.UseSetSource)

   ' The image for the ImageSource
   Dim img As Image = New Image()
   img.Source = source

   ' The black text block
   Dim textBlock As TextBlock = New TextBlock()
   textBlock.FontFamily = New FontFamily("Arial")
   textBlock.FontSize = 20
   textBlock.Text = message
   textBlock.Foreground = New SolidColorBrush(Color.FromArgb(255, 0, 0, 0))

   ' Add the image source and the text block
   canvas.Children.Add(img)
   canvas.Children.Add(textBlock)

   ' Center the text
   Dim left As Double = (canvas.Width - textBlock.ActualWidth) / 2
   Dim top As Double = (canvas.Height - textBlock.ActualHeight) / 2
   textBlock.SetValue(Canvas.LeftProperty, left)
   textBlock.SetValue(Canvas.TopProperty, top)

   ' Render
   bitmap.Render(canvas, Nothing)
   bitmap.Invalidate()

   image.Dispose()

   ' Re-create the RasterImage from the WriteableBitmap
   image = RasterImageConverter.ConvertFromSource(bitmap, ConvertFromSourceOptions.None)

   ' stamp has to be 24-bit, so convert it back
   Dim cmd As ColorResolutionCommand = New ColorResolutionCommand()
   cmd.BitsPerPixel = 24
   cmd.Run(image)

   ' This image contains the stamp, save it to the output stream
   codecs.SaveStamp(image, outStreamFileWithStamp)
   image.Dispose()

   ' Load the stamp from the file and save it to the other output stream
   image = codecs.ReadStamp(outStreamFileWithStamp, 1)
   codecs.Save(image, outStreamStampOnly, RasterImageFormat.Bmp, 24)
   image.Dispose()
End Sub

            

   

      
	
      
	
    

            
            
Requirements
Target Platforms

            
            
See Also
Reference
RasterCodecs Class

RasterCodecs Members

Overload List

Implementing Extended FlashPix Support




        
    

	
    

        

 
 
          

























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