LBase::EncodeABIC

#include "ltwrappr.h"

static L_INT LBase::EncodeABIC(pInputData, nAlign, nWidth, nHeight, ppOutputData, pnLength, bBiLevel);

L_UCHAR * pInputData;	/* input data buffer */
L_INT nAlign;	/* number of bytes aligned for uncompressed input data */
L_INT nWidth;	/* image width in pixels */
L_INT nHeight;	/* image height in pixels */
L_UCHAR ** ppOutputData;	/* output data buffer to receive */
L_SSIZE_T * pnLength;	/* pointer to variable */
L_BOOL bBiLevel;	/* flag */

Compresses the input raw data using the ABIC encoder.

Parameter	Description
pInputData	Pointer to a buffer that contains the uncompressed raw data.
nAlign	Number of bytes used to align the uncompressed raw data pointed to by pInputData.
nWidth	Width of the uncompressed raw data image, in pixels.
nHeight	Height of the uncompressed raw data image, in pixels.
ppOutputData	Pointer to a pointer to an output data buffer to be updated with the resulting compressed ABIC data.
pnLength	Pointer to a variable to be updated with the length of the resulting compressed data pointed to by ppOutputData.
bBiLevel	Flag that indicates whether to encode the uncompressed input data pointed to by pInputData as bi-level or grayscale. Possible values are:
	Value	Meaning
	TRUE	Encodes the input buffer as 1-bit Bi-level.
	FALSE	Encodes the input buffer as 4-bit Grayscale.

Returns

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

Comments

This function compresses the input raw data to 1-bit bi-level or 4-bit grayscale ABIC data.

The output buffer pointed by ppOutputData is allocated automatically by the function. The user is responsible to free this ppOutputData buffer by calling GlobalFreePtr() function.

Required DLLs and Libraries

LTFIL

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:	LBase::DecodeABIC
Topics:	Compressing and Decompressing Buffers
	Raster Image Functions: Compression Functions

Example

L_INT LBase__EncodeABICExample( LBitmapBase&  Bitmap ) 
{
   L_UCHAR  *pData; 
   L_UCHAR  *pOutData; 
   L_SSIZE_T  nOutLength; 
   L_INT  nRet; 
   L_HANDLE pFile = NULL; /* File handle */
   
   LMemoryFile Memfile; 
   LBuffer     Buffer; 
   DWORD       wWrittenBytes;
   nRet = 0; 
   if( Bitmap.IsAllocated() ) 
   {
      nOutLength = 0; 
      pOutData = NULL; 
      Memfile.SetBitmap(&Bitmap); 
      nRet = Memfile.Save( &Buffer, FILE_RAW, Bitmap.GetBitsPerPixel(), 0, NULL ); 
      if( SUCCESS == nRet ) 
      {
         pData = (L_UCHAR *)GlobalLock( Buffer.GetHandle() ); 
         nRet = LBase::EncodeABIC( pData, 4, Bitmap.GetWidth(), Bitmap.GetHeight(), &pOutData, &nOutLength, FALSE ); 
         if( SUCCESS == nRet ) 
         {
            pFile = CreateFile(TEXT("%UserProfile%\\My Documents\\LEADTOOLS Images\\output.ica"), GENERIC_ALL, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
        
            if( pFile ) 
            {
               
               if( !WriteFile(pFile, pOutData,(DWORD)(sizeof( L_UCHAR ) * nOutLength), &wWrittenBytes, NULL)) 
               {
                  nRet = -1; /* failed to write data */ 
               }
               CloseHandle(pFile ); 
            }
            else
            {
               nRet = -1; /* failed to open file */
            }
            
            GlobalFreePtr( pOutData ); 
            nRet = 0; 
         }
         else
         {
            nRet = -1; /* failed to encode data */ 
         }
         
         GlobalUnlock( Buffer.GetHandle() ); 
         GlobalFree( Buffer.GetHandle() ); 
      }
   }
   else
   {
      MessageBox( AfxGetApp()->m_pMainWnd->GetSafeHwnd(), TEXT("Do decode first please!"), TEXT("Information!"), MB_OK | MB_ICONINFORMATION); 
      nRet = 0; 
   }
   
   return nRet; 
}