LBitmapBase::HasRgn

#include "ltwrappr.h"

virtual L_BOOL LBitmapBase::HasRgn()

Determines whether the bitmap has a region.

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 LBitmap::Posterize) 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 LBitmapRgn::Free function.

Required DLLs and Libraries

LTDIS
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.

Platforms

Win32, x64.

See Also

Functions:

Class Members

Topics:

Raster Image Functions: Creating and Using a Region

 

Raster Image Functions: Region Processing

 

Defining and Using a Bitmap Region

Example

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
L_INT LBitmapBase__HasRgnExample() 
{ 
   L_INT nRet; 
   LBitmapBase MyBitmap; 
   MyBitmap.SetFileName(MAKE_IMAGE_PATH(TEXT("image1.cmp"))); 
   nRet =MyBitmap.Load(24); 
   if(nRet !=SUCCESS) 
      return nRet; 
   /*……create a region for the bitmap…..*/ 
   /*……….*/ 
   if(MyBitmap.HasRgn()) 
      nRet = MyBitmap.Free(); 
   return nRet; 
}

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