LNITFFile::GetGraphicHeader

#include "ltwrappr.h"

L_INT LNITFFile::GetGraphicHeader(uIndex, pGraphicHeader)

Retrieves the graphic header information of a specific graphic segment.

Parameters

L_UINT uIndex

A zero-based index of the graphic segment in the NITF file.

pGRAPHICHEADER pGraphicHeader

Pointer to a GRAPHICHEADER structure to be updated with the graphic header information of the specified graphic segment at the index uIndex.

Returns

Value Meaning
SUCCESS The function was successful.
< 1 An error occurred. Refer to Return Codes.

Comments

To retrieve the number of the graphic segments available in the NITF file, call the LNITFFile::GetGraphicHeaderCount function.

To change the graphic header information for a specific graphic segment, call the LNITFFile::SetGraphicHeader function.

Required DLLs and Libraries

See Also

Functions

Topics

Example

L_INT LNITFFile_GetGraphicHeaderExample() 
{ 
   // Create hNitf handle and parse the NITF file 
 
   LNITFFile Nitf;  
   Nitf.Create (MAKE_IMAGE_PATH(TEXT("test.ntf"))); 
   L_UINT uFlags = 0;  
   GRAPHICHEADER GraphicHeader;  
   L_UINT uCount;  
   L_UINT i = 0;  
 
   memset(&GraphicHeader, 0, sizeof(GRAPHICHEADER));  
 
   // Check if the NITF file is empty or invalid 
   uFlags = Nitf.GetStatus (); 
   if((uFlags & NITF_FILE_EMPTY) == NITF_FILE_EMPTY)  
   { 
      MessageBox(NULL, TEXT("NITF file is empty"), 0, 0); 
      return SUCCESS;  
   } 
 
   if((uFlags & NITF_FILE_VALID) != NITF_FILE_VALID)  
   { 
      MessageBox(NULL, TEXT("NITF file is invalid"), 0, 0); 
      return SUCCESS;  
   } 
 
   // Update the graphic header 
   uCount = Nitf.GetGraphicHeaderCount (); 
 
   for( i = 0; i < uCount; ++i)  
   { 
      if(Nitf.GetGraphicHeader(i, &GraphicHeader) == SUCCESS)  
      { 
         GraphicHeader.nSBND1Row = 20;  
         GraphicHeader.nSBND1Col = 50;  
         GraphicHeader.nSBND2Row = 200;  
         GraphicHeader.nSBND2Col = 400;  
 
         Nitf.SetGraphicHeader (i, &GraphicHeader);  
         Nitf.FreeGraphicHeader(&GraphicHeader); 
      } 
    } 
 
   Nitf.SaveFile (MAKE_IMAGE_PATH(TEXT("test1.ntf"))); 
   Nitf.Destroy (); 
 
   return SUCCESS; 
} 
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