LBitmapBase::RotateViewPerspective

Summary

Rotates the class object's bitmap by changing its view perspective.

Syntax

#include "ltwrappr.h"

virtual L_INT LBitmapBase::RotateViewPerspective(nAngle)

Parameters

L_INT nAngle

Degrees of rotation. Valid values +-90, +-180, +-270, or +-360. Positive values are clockwise; negative values are counterclockwise.

Returns

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

Comments

This function achieves fast rotation by changing only the view perspective. After using this function, you can reverse the result by restoring the original view perspective.

Some functions must account for the view perspective. For general information about view perspectives, refer to Accounting for View Perspective.

Required DLLs and Libraries

Platforms

Win32, x64.

See Also

Functions

Topics

Example

L_INT LBitmapBase__RotateViewPerspectiveExample() 
{ 
   L_INT nRet; 
   LBitmapBase MyBitmap,Bitmap2; 
 
   MyBitmap.SetFileName(MAKE_IMAGE_PATH(TEXT("image1.cmp"))); 
   nRet =MyBitmap.Load(); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =MyBitmap.RotateViewPerspective(90); 
   if(nRet !=SUCCESS) 
      return nRet; 
 
   return SUCCESS; 
}
Help Version 22.0.2023.2.2
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