LBitmapBase::Shear

#include "ltwrappr.h"

virtual L_INT LBitmapBase::Shear(nAngle, bHorizontal=TRUE, crFill=0)

L_INT nAngle;

angle of slant

L_BOOL bHorizontal;

flag that indicates the direction of the shear

COLORREF crFill;

COLORREF value for the fill color

Moves the corners of the class object's bitmap in the fashion of a parallelogram.

Parameter Description
nAngle The angle of slant. Positive values are for clockwise angles; negative values are for counterclockwise angles. The angle is expressed in hundredths of degrees, with a limit of 4500 (45 degrees).
bHorizontal Flag that indicates the direction of the shear. Possible values are:
  Value Meaning
  TRUE Horizontal shear.
  FALSE Vertical shear.
crFill The COLORREF value that specifies the fill color. You can specify a COLORREF value, such as the return value of the Windows RGB macro, or you can use the PALETTEINDEX macro to specify a palette color.

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Comments

You specify an angle of slant, horizontal or vertical shear, and the fill color for the created space. The following is a horizontal example:

For an example, click here

The angle is expressed in hundredths of degrees, with a limit of 4500 (45 degrees).

To update a status bar or detect a user interrupt during execution of this function, refer to LBase::EnableStatusCallBack.

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.

Required DLLs and Libraries

LTDIS
LTFIL

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.

See Also

Functions:

LBitmapBase::Rotate, LBitmapBase::Flip, LBitmapBase::Reverse, Class Members

Topics:

Raster Image Functions: Doing Geometric Transformations

 

Resizing Considerations

 

Using Color Values in LEADTOOLS

Example

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
L_INT LBitmapBase__ShearExample() 
{ 
   L_INT nRet; 
   LBitmapBase MyBitmap; 
   MyBitmap.SetFileName(MAKE_IMAGE_PATH(TEXT("image1.cmp"))); 
   nRet =MyBitmap.Load(); 
   if(nRet !=SUCCESS) 
      return nRet; 
   nRet =MyBitmap.Shear(2200,FALSE, RGB(220,120,220)); 
   if(nRet !=SUCCESS) 
      return nRet; 
   return SUCCESS; 
}

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