bugFree UCS Outline Fonts - Bugs: bug #52448, Wrong glyph classes for marks in...


bug #52448: Wrong glyph classes for marks in FreeMono

Submitted by:  David Corbett <dscorbett>
Submitted on:  Sun 19 Nov 2017 03:18:09 PM UTC  
Category: overall font problemSeverity: 3 - Normal
Item Group: letter positioning poorStatus: Fix posted
Privacy: PublicAssigned to: Steve White <Stevan_White>
Open/Closed: OpenRelease: development

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Thu 30 Nov 2017 10:32:11 PM UTC, comment #2:

This issue, as I understand it, should now be fixed.

Steve White <Stevan_White>
Project AdministratorIn charge of this item.
Sun 26 Nov 2017 11:44:17 AM UTC, comment #1:


Once again, David, you've clarified something for me about FontForge.

What's happened here, as in the music ranges and elsewhere, is that some late night I got some positioning to work, in a way that I found puzzling. But FontForge was doing something sneaky (or "helpful" in an Orwellian sense), changing the OT Glyph Class, which I was taking to be something fixed by the standard, whenever a mark-to-mark anchor was put into a base glyph.

So. I need to write a script to find instances of mark-to-mark anchors in base glyphs.

How annoying. It would have been so much better if FontForge had raised a warning rather than silently fixing a mistake.

Steve White <Stevan_White>
Project AdministratorIn charge of this item.
Sun 19 Nov 2017 03:18:09 PM UTC, original submission:

In FreeMono (all styles), combining characters whose glyph classes FontForge automatically detects as base instead of mark have positive advance width in Uniscribe. The solution is to explicitly set the glyph class of each combining character that FontForge gets wrong, i.e. all of them that don’t have anchor points.

This is the cause of bug #48547, which is still not fixed even though I said it was.

David Corbett <dscorbett>


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    Follow 3 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Thu 30 Nov 2017 10:32:11 PM UTCStevan_WhiteStatusProceeding=>Fix posted
    Sun 26 Nov 2017 11:44:17 AM UTCStevan_WhiteStatusNone=>Proceeding
      Assigned toNone=>Stevan_White

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