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.

Regions are not supported on the Windows CE platform.

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

Win32, x64, Linux.

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 (MAKE_IMAGE_PATH(TEXT("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(MAKE_IMAGE_PATH(TEXT("Result.BMP")), &LeadBitmap, FILE_BMP, 24, 0, NULL); 
   if(nRet != SUCCESS) 
      return nRet; 
   if(LeadBitmap.Flags.Allocated) 
      L_FreeBitmap(&LeadBitmap);   
 
   return SUCCESS; 
} 

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