LMemoryFile::SaveFileCallBack

#include "ltwrappr.h"

virtual L_INT LMemoryFile::SaveFileCallBack(pLBitmap, pLBuffer, uRow, uLines)

LBitmapBase *pLBitmap;	/* pointer to an LBitmap object */
LBuffer * pLBuffer;	/* pointer to an LBuffer object */
L_UINT uRow;	/* row number */
L_UINT uLines;	/* number of lines to save */

This function is called by the LMemoryFile::SaveFileBuffer function to save the specified image data.

Parameter	Description
pLBitmap	Pointer to an LBitmapBase object that contains the image data.
pLBuffer	Pointer to an LBuffer object into which the bitmap will be saved.
uRow	Number of the first row of data that the callback will write to the buffer.
uLines	Number of lines that the callback will write to the buffer.

Returns

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

Comments

If this function is overridden, the user must supply the image data that the function will save. The base class implementation saves data from the class object's associated bitmap.

This function does not support signed data images, unless they are DICOM images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image that is not a DICOM image is passed to this 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:	LMemoryFile::SaveFileBuffer, Class Members
Topics:	Raster Image Functions: Saving Files
	Raster Image Functions: Redirecting Input and Output
	Raster Image Functions: Input and Output
	Loading and Saving Images

Example

class LUserMemoryFile : public LMemoryFile
{
   virtual L_INT SaveFileCallBack(LBitmapBase * pLBitmap,
                                  LBuffer * pLBuffer,
                                  L_UINT uRow,
                                  L_UINT uLines)
   {
      L_TCHAR szMessage[64];

      wsprintf(szMessage, TEXT("The number of lines is %u."), uLines);
      MessageBox(NULL, szMessage, TEXT("Testing"), MB_OK);

      return SUCCESS;
   }
};

L_INT SaveFileBufferSample(LBitmapBase & Bitmap)
{
   LUserMemoryFile MemoryFile;
   LBuffer Buffer(1000);   // 1000 bytes; supposed to be enough
   L_UINT32 dwFileSize;

   MemoryFile.SetBitmap(&Bitmap);

   if (!MemoryFile.IsCallBackEnabled())
      MemoryFile.EnableCallBack(TRUE);

   return MemoryFile.SaveFileBuffer(&Buffer,
                                    &dwFileSize,
                                    FILE_TIF,
                                    0,
                                    QS,
                                    SAVEFILE_FIXEDPALETTE,
                                    NULL);
}