Resize filters work wrong, changing only scaleY (down) or scaleX (up) causes wrong ratio and undesired padding

[rdsn]

Version

4.2.0

Test Case

http://fabricjs.com/lanczos-webgl

Information about environment

Any browser

Steps to reproduce

You can see this behavior on http://fabricjs.com/lanczos-webgl when you try to scale image up by dragging only horizontal handles or scale down by dragging vertical handles

Expected Behavior

Image fills the whole selection box

Actual Behavior

Some strange padding appears under the image its selection box

Also it is not clear why there are scaleX and scaleY instead of just scale, it is not clear what is the use case for having 2 and docs don't say anything about that.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[asturur]

thank you there was an error in plain sight: #6778

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.