SaveStamp(RasterImage,Stream) Method

Summary

Saves a stamp in an existing stream with default options.

Syntax

Objective-C

C++/CLI

Java

Python

public void SaveStamp( 
   RasterImage image, 
   Stream stream 
)

- (BOOL)saveStamp:(LTRasterImage *)image  
           stream:(LTLeadStream *)stream  
            error:(NSError **)error

public void saveStamp(RasterImage image, ILeadStream stream)

public: 
void SaveStamp(  
   RasterImage^ image, 
   Stream^ stream 
)

def SaveStamp(self,image,stream):

Parameters

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

stream
A Stream containing the data of an existing image file.

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 function works for JPEG, Exif, PNG and TIF file formats. 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).

For PNG files, the stamp will be saved uncompressed. The width and height are not limited but the bitmap should 24-bit.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
 
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:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

RasterCodecs Class

RasterCodecs Members

Overload List

Implementing Extended FlashPix Support

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Help Version 22.0.2023.5.5

Leadtools.Codecs Assembly

Introduction

Getting Started

Namespaces

Leadtools.Codecs Namespace

Assemblies