[tx] Bounding box not calculated correctly when start point is on right most edge of bounding box

[benkiel]

When looking for the answer for why comparefamily was incorrectly reporting bogus stems for a typeface, I realized that with a glyph like so:

<?xml version="1.0" encoding="UTF-8"?>
<glyph name="guilsinglright" format="1">
  <advance width="0"/>
  <outline>
    <contour>
      <point x="261" y="202" type="line"/>
      <point x="261" y="227" type="line"/>
      <point x="77" y="435" type="line"/>
      <point x="74" y="435" type="line"/>
      <point x="40" y="386" type="line"/>
      <point x="40" y="383" type="line"/>
      <point x="182" y="202" type="line"/>
      <point x="40" y="25" type="line"/>
      <point x="40" y="22" type="line"/>
      <point x="58" y="-5" type="line"/>
      <point x="61" y="-5" type="line"/>
    </contour>
  </outline>
</glyph>

the bounding box gotten by comparefamily with tx from here:

afdko/python/afdko/comparefamily.py

Line 974 in b7b86e1

cmpfFont.metricsDict = {}

has the bounding box at 236, not 221 like it should be. This seems consistent with glyphs that have their start point on the right edge.

[miguelsousa]

Thanks for the report @benkiel. I've created branch tx-glyphybboxes-bug655 containing a test case and @cjchapman will have a look at it.

[benkiel]

@miguelsousa thank you!

[benkiel]

Confirmed fixed, thank you @cjchapman!

[cjchapman]

@benkiel You're welcome. Thanks for the confirmation!