L_GetBitmapRgnArea

#include "l_bitmap.h"

L_INT EXT_FUNCTION L_GetBitmapRgnArea(pBitmap, puArea)

pBITMAPHANDLE pBitmap;	/* pointer to the bitmap */
L_UINT32 L_FAR * puArea;	/* address of the variable to be updated */

Gets the total number of pixels in the bitmap region.

Parameter	Description
pBitmap	Pointer to the bitmap handle referencing the bitmap that has the region.
puArea	Address of the variable to be updated with the pixel count.

Returns

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

Comments

Before calling this function, you must declare an L_UINT32 variable for the pixel count. You can then pass the address of the variable in the puArea parameter, and the function will update the variable.

Required DLLs and Libraries

LTDIS

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 95 / 98 / Me, Windows 2000 / XP.

See Also

Functions:	L_FrameBitmapRgn, L_BitmapHasRgn, L_FreeBitmapRgn, L_IsPtInBitmapRgn
Topics:	Raster Image Functions: Creating and Using a Region
	Raster Image Functions: Region Processing
	Defining and Using a Bitmap Region

Example

For complete sample code, refer to the FEATURE3 example.

/* This example displays the area of the current bitmap region */
BITMAPHANDLE LeadBitmap;   /* Bitmap handle for the image */
void TestFunction(HWND hWnd)
{
   L_TCHAR szMessage[80]; /* Buffer for the MessageBox string */
   L_UINT32 dwArea; /* Number of pixels in the region */
   /* Get the number of pixels in the region */
   L_GetBitmapRgnArea(&LeadBitmap, &dwArea);
   /* Display the result in a message */
   wsprintf( szMessage, TEXT("The region area is %ld pixels"), dwArea );
   MessageBox (NULL, szMessage, TEXT("Notice"), MB_OK);
}