LBitmapRgn::SetRgnEllipse

#include "ltwrappr.h"

virtual L_INT LBitmapRgn::SetRgnEllipse(pRect)

LPRECT pRect;

pointer to the bounding rectangle of the region

Creates or updates the associated class object's bitmap region by adding an elliptical region.

Parameter	Description
pRect	Pointer to the windows RECT structure that specifies the bounding rectangle of the elliptical region. You specify the structure using device context coordinates, and LEADTOOLS translates the coordinates using the values set using LBitmapRgn::SetRgnXForm.

Returns

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

Comments

To update an existing region, you 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

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
L_INT LBitmapRgn__SetRgnEllipseExample() 
{ 
   L_INT nRet = FAILURE; 
   LBitmapBase MyBitmap(200,300,ORDER_BGR); 
   RECT Rect={10,10,50,200}; 
   nRet = MyBitmap.Load(MAKE_IMAGE_PATH(TEXT("image1.cmp"))); 
   if(nRet !=SUCCESS) 
      return nRet; 
   LBitmapRgn Region(&MyBitmap); 
   // check if the bitmap region is valid or not 
   if (Region.IsValid() ==FALSE) 
      Region.SetBitmap(&MyBitmap); 
   //set the ellipse as a region 
   nRet = Region.SetRgnEllipse(&Rect); 
   if(nRet !=SUCCESS) 
      return nRet; 
   //… 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

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LEADTOOLS Raster Imaging C++ Class Library Help

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LEADTOOLS Raster Imaging Features

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Classes and Member Functions

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Summary of Features

Functions:	LBitmapRgn::SetRgnColor, LBitmapRgn::SetRgnPolygon, LBitmapRgn::SetRgnRect, LBitmapRgn::SetRgnRoundRect, LBitmapRgn::SetRgnColorHSVRange, LBitmapRgn::SetRgnColorRGBRange, Class Members
Topics:	Raster Image Functions: Creating and Using a Region
	Raster Image Functions: Region Processing
	Defining and Using a Bitmap Region
	Saving a Region