Certain GIFs are cropped or stretched oddly

[jerryorr]

I'm not sure exactly what conditions cause this, but certain GIFs are cropped or stretched oddly. You can see the behavior using https://gokercebeci.com/dev/canvasresize

This image is handled correctly:

This image is cropped to the top-left quadrant:

And this image has the bottom half cropped off, then stretched vertically to fill the space:

[lorenzo-dd]

+1 confirming this bug, some pngs are getting cropped, attaching one:

[giladMS]

Happens when you have transparent edges.

[Rob-ot]

Same issue here. It looks like detectVerticalSquash is returning the wrong value since it's checking transparency to... I don't really know what it does. I'm not really sure how to fix this.