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LBitmapRgn::ResizeRgn

Summary

Resizes the region defined in the class object's bitmap by the specified number of pixels.

Syntax

#include "ltwrappr.h"

virtual L_INT LBitmapRgn::ResizeRgn(uInflate, uFlag, bAsFrame)

Parameters

L_UINT uInflate

Number of pixels by which to resize the region.

L_UINT uFlag

Flag that indicates whether to contract or expand the bitmap region. Possible values are:

Value	Meaning
RGN_EXPAND	[0x0001] Expand the region.
RGN_CONTRACT	[0x0002] Contract the region.

L_BOOL bAsFrame

Flag that indicates whether to create a frame associated with the resized bitmap region. Possible values are:

Value	Meaning
TRUE	Create a frame of thickness uDim for the resized region. If uFlags is RGN_EXPAND, the frame created will exist outside the boundaries of the resized region. If uFlags is RGN_CONTRACT, the frame will be within the boundaries of the resized region.
FALSE	Resize the region only. Do not create a frame.

Returns

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

Comments

This function keeps the same bitmap handle and resizes the bitmap region that it references.

This function supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.

This function supports signed data images.

This function supports 32-bit grayscale images.

Required DLLs and Libraries

LTDIS
LTFIL
LTIMGEFX
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.

Example

L_INT LBitmapRgn__ResizeRgnExample(LBitmap & Bitmap, L_TCHAR * szFile) 
{ 
   L_INT nRet; 
   LBitmapRgn Region; 
 
   nRet =Bitmap.Load(szFile); 
   if(nRet !=SUCCESS) 
      return nRet; 
 
   RECT rect = { Bitmap.GetWidth() / 4, Bitmap.GetHeight() / 4, 
                 Bitmap.GetWidth() / 2, Bitmap.GetHeight() / 2 }; 
       
   Region.SetBitmap(&Bitmap); 
   nRet =Region.SetRgnRect(&rect); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =Bitmap.Invert(); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =Region.ResizeRgn(20, RGN_CONTRACT, FALSE); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =Bitmap.Invert(); 
   if(nRet !=SUCCESS) 
      return nRet; 
 
   return SUCCESS; 
}