In This Topic ▼

LBitmapRgn::SetRgnCurve

Summary

Creates or updates the region of the class object's associated bitmap by adding a curved region.

Syntax

#include "ltwrappr.h"

virtual L_INT LBitmapRgn::SetRgnCurve(pCurve)

Parameters

pCURVE pCurve

Pointer to the CURVE structure that specifies the curve region. The structure is specified using device context coordinates, and LEADTOOLS translates the coordinates using the values specified in the LBitmapRgn::SetRgnXForm parameter.

Returns

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

Comments

To update an existing region, use the LBitmapRgn::SetRgnCombineMode function to specify how the new region is to be combined with the existing one. For descriptions of the possibilities, refer to Creating a Bitmap Region.

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

Win32, x64.

Example

L_INT LBitmapRgn__SetRgnCurveExample(LBitmap & Bitmap) 
{ 
   L_INT nRet; 
   CURVE curve; 
   POINT pt[5]; 
   L_INT nWidth = Bitmap.GetWidth(); 
   L_INT nHeight = Bitmap.GetHeight(); 
   LBitmapRgn Region; 
 
   pt[0].x = nWidth / 4; 
   pt[0].y = nHeight / 4; 
   pt[1].x = nWidth / 4; 
   pt[1].y = 3 * nHeight / 4; 
   pt[2].x = 3 * nWidth / 4; 
   pt[2].y = 3 * nHeight / 4; 
   pt[3].x = nWidth / 2; 
   pt[3].y = nHeight / 2; 
   pt[4].x = 3 * nWidth / 4; 
   pt[4].y = nHeight / 4; 
 
   curve.uStructSize=sizeof(CURVE); 
   curve.nType = CURVE_STANDARD; 
   curve.nPointCount = sizeof(pt) / sizeof(pt[0]); 
   curve.pPoints = pt; 
   curve.uFillMode = L_POLY_WINDING; 
   curve.dTension = 0.5; 
   curve.nClose = CURVE_CLOSE; 
   curve.nReserved = 0; 
 
   Region.SetBitmap(&Bitmap); 
   nRet =Region.SetRgnCurve(&curve); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =Bitmap.Invert(); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =Region.Free(); 
   if(nRet !=SUCCESS) 
      return nRet; 
 
   return SUCCESS; 
}