L_ClearBitmap

#include "l_bitmap.h"

L_LTKRN_API L_INT L_ClearBitmap(pBitmap)

pBITMAPHANDLE pBitmap;

/* pointer to the bitmap handle */

Sets all bits to 0 in the specified bitmap, making it a black bitmap.

Parameter

Description

pBitmap

Pointer to the bitmap handle referencing the bitmap to clear.

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Comments

To update a status bar or detect a user interrupt during execution of this function, refer to L_SetStatusCallback.

Required DLLs and Libraries

LTKRN

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

Windows 2000 / XP/Vista, Windows CE.

See Also

Functions:

L_AccessBitmap, L_ReleaseBitmap, L_GetBitmapRow,

 

L_PutBitmapRow, L_GetBitmapRowCol,

 

L_PutBitmapRowCol, L_GetPixelColor,

 

L_PutPixelColor, L_ClearNegativePixels

Topics:

Raster Image Functions: Getting and Setting Pixel Values

Example

For complete sample code, refer to the COMPCB example. This example loads a bitmap and clears it. 

 L_INT ClearBitmapExample(L_VOID)
{
   L_INT nRet;
   BITMAPHANDLE LeadBitmap;   /* Bitmap handle to hold the loaded image. */

   /* Load the bitmap, keeping the bits per pixel of the file */
   nRet = L_LoadBitmap (TEXT("C:\\Program Files\\LEAD Technologies\\LEADTOOLS 15\\Images\\IMAGE1.CMP"), &LeadBitmap, sizeof(BITMAPHANDLE), 0, ORDER_BGR, NULL, NULL);
   if(nRet != SUCCESS)
      return nRet;
   /* Clear the bitmap */
   nRet = L_ClearBitmap(&LeadBitmap);
   if(nRet != SUCCESS)
      return nRet;

   nRet = L_SaveBitmap(TEXT("C:\\Program Files\\LEAD Technologies\\LEADTOOLS 15\\Images\\Result.BMP"), &LeadBitmap, FILE_BMP, 24, 0, NULL);
   if(nRet != SUCCESS)
      return nRet;
   if(LeadBitmap.Flags.Allocated)
      L_FreeBitmap(&LeadBitmap);  

   return SUCCESS;
}