L_EncodeABIC

#include "ltfil.h"

L_LTFIL_API L_INT L_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.

Platforms

Win32, x64.

See Also

Functions:

L_DecodeABIC

Topics:

Raster Image Functions: Compression Functions

 

Compressing and Decompressing Buffers

Example

L_INT EncodeABICExample( HWND hWnd, pBITMAPHANDLE  pBitmap) 
{ 
   HGLOBAL   hGlobal=NULL; 
   L_UCHAR   *pData=NULL; 
   L_SIZE_T  uLength=0; 
   L_UCHAR   *pOutData=NULL; 
   L_SSIZE_T nOutLength=0; 
   L_INT  nRet; 
   L_HANDLE  pFile; 
   DWORD wWrittenBytes; 
 
   nRet = 0; 
   if( pBitmap->Flags.Allocated ) 
   { 
      nOutLength = 0; 
      pOutData = NULL; 
 
      nRet = L_SaveBitmapMemory( &hGlobal, pBitmap, FILE_RAW, pBitmap->BitsPerPixel, 0, &uLength, NULL ); 
      if( SUCCESS == nRet ) 
      { 
         pData = (L_UCHAR *)GlobalLock( hGlobal ); 
 
         nRet = L_EncodeABIC( pData, 4, pBitmap->Width, pBitmap->Height, &pOutData, &nOutLength, FALSE ); 
         if( SUCCESS == nRet ) 
         { 
            pFile = CreateFile(MAKE_IMAGE_PATH(TEXT("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 ); 
            
         } 
         else 
         { 
            return nRet; /* failed to encode data */  
         } 
         GlobalUnlock( hGlobal ); 
         GlobalFree( hGlobal ); 
      } 
      else 
      { 
         MessageBox( hWnd, TEXT("Do decode first please!"), TEXT("Information!"), MB_OK | MB_ICONINFORMATION); 
         return nRet; 
      } 
   } 
   else 
      return FAILURE; 
 
   return nRet ; 
} 

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