LBitmapBase::HasRgn

Summary

Determines whether the bitmap has a region.

Syntax

#include "ltwrappr.h"

virtual L_BOOL LBitmapBase::HasRgn()

Returns

Value Meaning
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

Platforms

Win32, x64.

See Also

Functions

Topics

Example

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; 
 
}
Help Version 22.0.2023.2.2
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