This enumeration specifies Shear effect filling styles. Please see IG_FX_shear function for reference.
Values:
| IG_IP_SHEAR_FILLCOLOR | Empty area is filled with the specified color. |
| IG_IP_SHEAR_NOCHANGE | Empty area remains unchanged. |
| IG_IP_SHEAR_REPEATEDGE | Empty area is filled with the first or last raster color. |
| IG_IP_SHEAR_REPEATRASTER | The raster is repeated periodically across the empty area. |