L_BitmapHasRgn

#include "l_bitmap.h"

L_BOOL EXT_FUNCTION L_BitmapHasRgn(pBitmap)

/* pointer to the bitmap handle */

Determines whether the bitmap has a region.

Parameter	Description
pBitmap	Pointer to the bitmap handle referencing the bitmap to test.

Returns

TRUE	The specified bitmap has a region.
FALSE	The specified bitmap does not have a region.

Comments

When a bitmap has a region, the LEADTOOLS functions that modify the pixel values (for example L_PosterizeBitmap) act on the region, rather than the whole bitmap. In addition, the LEADTOOLS functions that flip, reverse, rotate, shear, or resize a bitmap also transform the region to match the bitmap. For example, if you were to shear the bitmap that had a rectangular region, the region would become a parallelogram.

To remove a bitmap region, use the L_FreeBitmapRgn function.

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.

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