LFile::Compact

#include "ltwrappr.h"

L_INT LFile::Compact(pszDstFile, uPages, pLoadFileOption, pSaveFileOption)

L_TCHAR * pszDstFile;

/* name of the output file */

L_UINT uPages;

/* number of pages to copy */

pLOADFILEOPTION pLoadFileOption;

/* pointer to the LOADFILEOPTION structure */

pSAVEFILEOPTION pSaveFileOption;

/* pointer to the SAVEFILEOPTION structure */

Compacts TIFF files. It can also be used to copy or extract one or more pages from a TIFF file and copy them without recompression to another TIFF file.

Parameter

Description

pszDstFile

Character string that contains the name of the file in which all the pages will be written. This cannot be NULL. If this is NULL, the function will return an error. The pages can be added to this file using the pSaveFileOption parameter.

uPages

Number of pages to copy. Use 0 to copy all the pages. If uPages is > 0, only uPages will be copied to pszDstFile.

pLoadFileOption

Optional pointer to the LOADFILEOPTION structure, which can be used to specify a starting page. You can also speed up the access to the starting page using the IFD. You can pass NULL, which is equivalent to starting from the first page and to use the default load options.

pSaveFileOption

Optional pointer to the SAVEFILEOPTION structure, which can be used to specify where to save the data or how to modify an existing file. You can modify whether the new pages should appended, inserted or whether they should replace existing pages. Pass NULL to use the default save options.

Returns

SUCCESS

The function was successful.

ERROR_COMPACT_ABORTED

The function encountered an error while reading a page from the source file. Not all the pages have been copied to the destination file.

< 1

An error occurred. Refer to Return Codes.

Comments

The following members of the LOADFILEOPTION structure are important for this function:

If pSaveFileOption is NULL, then if pszDstFile exists, it will be overwritten regardless of its format. Also, defaults will be used when saving the file (it will be saved in Intel format). Refer to the SAVEFILEOPTION documentation. TIF files are saved in two possible byte orders: Intel or Motorola (see SAVEFILEOPTIONS.Flags and ESO_MOTOROLAORDER flag.

If pSaveFileOption is not NULL, the following members of the SAVEFILEOPTION structure are important for this function:

Required DLLs and Libraries

LTFIL

LFTIF

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

See Also

Functions:

LFile::SaveFile, LFile::SaveOffset, LBitmapBase::Save, LBitmapBase::Load, LFile::LoadFile, LFile::GetInfo, LBaseFile::GetDefaultLoadFileOption, LBaseFile::GetDefaultSaveFileOption

Topics:

Loading and Saving Large TIFF Files

 

Raster Image Functions: Loading Files

 

Raster Image Functions: Saving Files

Example

// Example 1
L_INT LFile__CompactExample_1() 
{
   /* This example will compact all the pages in a TIFF file. */
   /* It will create a new file called dstfile.tif */
   LFile lf;
   L_INT nRet = 0 ;
   lf.SetFileName(TEXT("%UserProfile%\\My Documents\\LEADTOOLS Images\\Faces_24.tif")) ;
   nRet = lf.Compact(TEXT("C:\\dstfile.tif"), 0, NULL, NULL); 
   if(nRet != SUCCESS) 
   {
      MessageBox(NULL, TEXT("Error compacting file!"), TEXT("ERROR"), MB_OK);
      return nRet;
   }
   return SUCCESS;
}
// Example 2
L_INT LFile__CompactExample_2() 
{
   /* This example will compact all the pages in a TIFF file.*/
   /* It will append all the pages to an existing file called dstfile.tif */
   LFile lf;
   SAVEFILEOPTION SaveFileOption;
   L_INT nRet = 0 ;
   lf.SetFileName(TEXT("%UserProfile%\\My Documents\\LEADTOOLS Images\\Faces_24.tif")) ;
   lf.GetDefaultSaveFileOption(&SaveFileOption, sizeof(SaveFileOption));
   SaveFileOption.PageNumber = 2;
   nRet = lf.Compact(TEXT("%UserProfile%\\My Documents\\LEADTOOLS Images\\dstfile.tif"), 0, NULL, &SaveFileOption);
   if(nRet != SUCCESS)
   {
      MessageBox(NULL, TEXT("Error compacting file!"), TEXT("ERROR"), MB_OK);
      return nRet;
   }
   return SUCCESS;
}