CompactFile(Stream,Stream,int) Method

Summary

Compacts TIFF/BigTIFF, PNG or JPEG streams with default options.

Syntax

Objective-C

C++/CLI

Python

public void CompactFile( 
   Stream srcStream, 
   Stream destStream, 
   int pages 
)

- (BOOL)compactStream:(LTLeadStream *)sourceStream  
    destinationStream:(LTLeadStream *)destinationStream  
                pages:(NSUInteger)pages  
                error:(NSError **)error

public: 
void CompactFile(  
   Stream^ srcStream, 
   Stream^ destStream, 
   int pages 
)

def CompactFile(self,srcStream,destStream,pages):

Parameters

srcStream
A source Stream containing the data for the file being compacted. All the pages will be read from this stream.

destStream
A destination Stream that will contain the written data.

pages
Value that represents the number of pages to copy. Use 0 to copy all the pages. If pages is > 0, only pages will be copied to destStream.

Remarks

This method can also be used to copy or extract one or more pages from a TIFF/BigTIFF file and copy them without recompression to another TIFF/BigTIFF file.

This method can also be used to convert a TIFF file to BigTIFF or vice versa. The destination file will be TIFF or BigTIFF, depending on the value of BigTiff.

If the source is PNG, the destination is also PNG. If the source is Exif JPEG, the destination is also Exif JPEG. For both of these formats, setting pages to 1 will discard the thumbnail if it exists.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
 
public void CompactFileExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "CompactFile1_Src.tif"); 
   string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "CompactFile1_Dest.tif"); 
 
   // Create a RasterImage with 4 pages containing text showing the page number 
   RasterImage image = null; 
   const int pageCount = 4; 
 
   using (System.Drawing.Font f = new System.Drawing.Font("Arial", 36, System.Drawing.FontStyle.Bold)) 
   using (System.Drawing.Bitmap btmp = new System.Drawing.Bitmap(320, 200)) 
   using (System.Drawing.StringFormat sf = new System.Drawing.StringFormat()) 
   { 
      System.Drawing.Rectangle rc = new System.Drawing.Rectangle(0, 0, btmp.Width, btmp.Height); 
      sf.Alignment = System.Drawing.StringAlignment.Center; 
      sf.LineAlignment = System.Drawing.StringAlignment.Center; 
 
      for (int i = 1; i <= pageCount; i++) 
      { 
         // Create a GDI+ bitmap with the text 
         string text = "Page " + i; 
 
         using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(btmp)) 
         { 
            g.FillRectangle(System.Drawing.Brushes.White, rc); 
            g.DrawString(text, f, System.Drawing.Brushes.Black, rc, sf); 
         } 
 
         RasterImage tempImage = Leadtools.Drawing.RasterImageConverter.ConvertFromImage(btmp, Leadtools.Drawing.ConvertFromImageOptions.None); 
 
         if (image == null) 
            image = tempImage; 
         else 
            image.AddPage(tempImage); 
      } 
   } 
 
   // Save all the pages to the file 
   // The file should have 4 pages now: 1, 2, 3, 4 
   codecs.Save(image, srcFileName, RasterImageFormat.Tif, 1, 1, pageCount, 1, CodecsSavePageMode.Overwrite); 
   image.Dispose(); 
 
   // All the pages in the source TIFF file. This will create the destination file 
   codecs.CompactFile(srcFileName, destFileName, 0); 
 
   // Compact the source file again and append all the pages to the existing destination file 
   int pagesToAdd = 0;  // 0 means all pages 
   int srcStartPage = 1; 
   int destStartPage = 5;  // insert at the end 
 
   codecs.CompactFile( 
      srcFileName, 
      destFileName, 
      pagesToAdd, 
      srcStartPage, 
      false, 
      0, 
      destStartPage, 
      false, 
      0, 
      CodecsSavePageMode.Insert, 
      false, 
      false); 
 
   // Clean up 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

Requirements

Target Platforms

Reference

RasterCodecs Class

RasterCodecs Members

Overload List

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Help Version 23.0.2024.2.29

Leadtools.Codecs Assembly

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Leadtools.Codecs Namespace

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