Follow-up Comment #7, bug #67544 (group groff): On Wednesday, 28 January 2026 02:57:25 GMT G. Branden Robinson wrote: > Follow-up Comment #6, bug #67544 (group groff): > > At 2026-01-27T18:33:14-0500, Deri James wrote: > [snip] > >> Of course the actual glyph shapes are identical because the glyphs for >> both TR and U-TR come from the same URW font. So, I did a third run, >> again no kerning, but ne-TR.pdf produced via grops->ghostscript. This >> time there is a visible difference - but not to the glyph shapes, just >> a very slight vertical shift. This is likely to be a rounding issue, >> grops uses 2 decimals gropdf 3 decimals rounded, don't know what >> ghostscript uses. The fact it repeats every 4 lines points towards >> rounded calculation landing on pixel boundaries when the glyphs are >> filled. > > I'm intrigued. Do you think it's worth trying to increase the precision > of grops's calculations? Or is this limitation on significant figures > imposed on us by the PostScript file format? > I was wrong. Grops and gropdf both round to 3dp. So I investigated, see attached file.
Cheers
Deri
(file #58171)
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