L_NITFGetGraphicHeader

#include "ltntf.h"

L_LTNTF_API L_INT L_NITFGetGraphicHeader(hNitf, uIndex, pGraphicHeader)

HNITF hNitf;	/* handle to an existing NITF file */
L_UINT uIndex;	/* index of the graphics data */
pGRAPHICHEADER pGraphicHeader;	/* pointer to a GRAPHICHEADER structure */

Retrieves the graphic header information of a specific graphic segment.

Parameter	Description
hNitf	Handle to an existing NITF file, created by calling the L_NITFCreate function.
uIndex	A zero-based index of the graphic segment in the hNitf handle.
pGraphicHeader	Pointer to a GRAPHICHEADER structure to be updated with the graphic header information of the specified graphic segment at the index uIndex.

Returns

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 hNitf handle, call the L_NITFGetGraphicHeaderCount function.

To change the graphic header information for a specific graphic segment, call the L_NITFSetGraphicHeader function.

Required DLLs and Libraries

LTNTF

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:	L_NITFCreate, L_NITFGetGraphicHeaderCount, L_NITFSetGraphicHeader
Topics:	NITF Functions: Getting and Setting Header Information
	Programming with LEADTOOLS NITF Functions

Example

L_LTNTFTEX_API L_INT NITFGetGraphicHeaderExample(L_VOID)
{
   HNITF hNitf;
   L_UINT uFlags = 0;
   GRAPHICHEADER GraphicHeader;
   L_UINT uCount;
   L_UINT i = 0;
   L_INT nRet;
   memset(&GraphicHeader, 0, sizeof(GRAPHICHEADER));
   // Create hNitf handle and parse the NITF file
   nRet =L_NITFCreate (&hNitf, TEXT("C:\\Program Files\\LEAD Technologies\\LEADTOOLS 16\\Images\\test.ntf"));
   if(nRet !=SUCCESS)
      return nRet;
   // Check if the hNITF is empty or invalid
   uFlags = L_NITFGetStatus(hNitf);
   if((uFlags & NITF_FILE_EMPTY) == NITF_FILE_EMPTY)
   {
      MessageBox(NULL,TEXT("NITF file is empty"),NULL,MB_OK);
      return FAILURE;
   }
   if((uFlags & NITF_FILE_VALID) != NITF_FILE_VALID)
   {
      MessageBox(NULL,TEXT("NITF file is invalid"),NULL,MB_OK);
      return FAILURE;
   }
   // Update the graphic header
   uCount = L_NITFGetGraphicHeaderCount(hNitf);
   for( i = 0; i < uCount; ++i)
   {
       memset(&GraphicHeader, 0, sizeof(GraphicHeader));
      nRet = L_NITFGetGraphicHeader(hNitf, i, &GraphicHeader) ;
       if(nRet == SUCCESS)
      {
         GraphicHeader.nSBND1Row = 20;
         GraphicHeader.nSBND1Col = 50;
         GraphicHeader.nSBND2Row = 200;
         GraphicHeader.nSBND2Col = 400;
         nRet =L_NITFSetGraphicHeader(hNitf, i, &GraphicHeader);
         if(nRet !=SUCCESS)
            return nRet;
         L_NITFFreeGraphicHeader(&GraphicHeader);
      }
       else
          return nRet;
   }
   nRet =L_NITFDestroy(&hNitf);
   if(nRet !=SUCCESS)
      return nRet;
   return SUCCESS;
}