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LBitmap::Swirl

Summary

Spins the image according to the rotation angle to produce a swirl pattern.

Syntax

#include "ltwrappr.h"

virtual L_INT LBitmap::Swirl(nRotationAngle, CenterPt, uFlags = 0)

Parameters

L_INT nRotationAngle

The degree of rotation. This value is in degrees (0360720, etc.).

POINT CenterPt

POINT structure that contains the center of the swirl.

L_UINT32 uFlags

Reserved for future use. Must be 0.

Returns

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

Comments

The function swirls the image around the specified CenterPt. The center point must be defined inside the bitmap, or inside the region, if the bitmap has a region.

If the bitmap has a region, the effect will be applied on the region only.

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 does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.

This function does not support 32-bit grayscale images. It returns the error code ERROR_GRAY32_UNSUPPORTED if a 32-bit grayscale image is passed to this function.

Swirl Function - Before

Swirl Function - After

View additional platform support for this Swirl function.

Required DLLs and Libraries

LTIMGSFX
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 LBitmap__SwirlExample(LAnimationWindow * LAniWnd)  
{ 
 
   POINT   CenterPt;  
   CenterPt.x  =  (LAniWnd->GetHandle ())->Width/2;  
   CenterPt.y  =  (LAniWnd->GetHandle ())->Height/2;  
    
   return LAniWnd->Swirl(180, CenterPt);  
 
}