can we provide a property to fixed size

[heyehao2008]

I set the RSKImageCropMode = RSKImageCropModeSquare , when I zoom the image smaller ,the MaskRect is smaller with image, not to be a square . can we fixed the size and not changed with image zoom

[heyehao2008]

I'm sorry，the property 'avoidEmptySpaceAroundImage' is work for this function。please close this issue。