Bug 10144

Summary: add serifed blackboard bold characters
Product: DejaVu Reporter: Benjamin Esham <benjamin>
Component: SerifAssignee: Deja Vu bugs <dejavu-bugs>
Status: RESOLVED FIXED QA Contact:
Severity: enhancement    
Priority: low    
Version: unspecified   
Hardware: All   
OS: All   
Whiteboard:
i915 platform: i915 features:

Description Benjamin Esham 2007-03-01 09:59:23 UTC 
Blackboard bold characters [1] are used frequently in mathematics, but have very poor support in most fonts.  They are present in Sans, but the serifed versions are much more common in actual usage, so I am proposing that they be added to Serif.

The most commonly used letters are CHNPQRZ, as shown in [2]... these are the ones included in the BMP.  Support for all uppercase letters would be welcome too, but not at such a high priority.

Codepoints for CHNPQRZ: U+2102, 210D, 2115, 2119, 211A, 211D, 2124
For the other uppercase letters: U+1D538-1D551, with 7 exceptions

[1] http://en.wikipedia.org/wiki/Blackboard_bold
[2] http://www.w3.org/TR/MathML2/double-struck.html
Comment 1 John Karp 2007-09-24 10:08:38 UTC 
I believe the license of the AMS mathbb font is compatible with that of DejaVu. So these glyphs could be imported from there trivially, just needing a constant scaling factor to get the metrics to match.
Comment 2 Benjamin Esham 2007-12-09 20:36:25 UTC 
The glyphs have been added in 2.22.  Thanks!

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