Blackboard bold

[adityam]

Blackboard bold does not work with Context. Not sure if it is the fault of context mappings or are the glyphs missing from the font.

\starttypescript    [math]     [euler][name]
  \definefontsynonym[MathRoman][name:Neo Euler] [features=math]
\stoptypescript

\definetypeface [mainface] [rm] [serif] [palatino] [default] 
\definetypeface [mainface] [mm] [math]  [euler] [default]  

\setupbodyfont[mainface,12pt]
\starttext
$\Bbb ABCDEFGHIJKLMNOPQRSTUVWXYZ$
\stoptext

[khaledhosny]

The font has no blackboard glyphs, I've some experimental glyphs in the mathbb branch if you want to try it, but I don't dare merging it to the main font :).

[adityam]

Thanks. For the record, I need to call the fonts explicitly by filename: file:eulerbb

[khaledhosny]

BTW, $\Bbb \pi \gamma \Gamma \Pi \sum$ doesn't give the BB alternatives of those glyphs.

[adityam]

Here is a patch for math-map.lua to get this to work. I will ask Hans to merge this with the beta.

diff --git a/math-map.lua b/math-map.lua
index b3c5c29..e87f145 100644
--- a/math-map.lua
+++ b/math-map.lua
@@ -213,6 +213,15 @@ mathematics.alphabets = {
                 [0x0005A]=0x02124,
             },
             lcletters = 0x1D552,
+            lcgreek = { -- gamma pi
+                [0x03B3]=0x0213C, [0x03C0]=0x0213D,
+            },
+            ucgreek = { -- Gamma pi
+                [0x0393]=0x0213E, [0x03A0]=0x0213F, 
+            },
+            symbols = { -- sum
+              [0x2211]=0x02140,
+            },
         },
     },
     fraktur = { -- ok
@@ -294,9 +303,15 @@ alphabets.monospaced.it         = alphabets.sansserif.tf
 alphabets.monospaced.bf         = alphabets.sansserif.tf
 alphabets.monospaced.bi         = alphabets.sansserif.bf

-alphabets.blackboard.tf.symbols = alphabets.regular.tf.symbols
-alphabets.blackboard.tf.lcgreek = alphabets.regular.tf.lcgreek
-alphabets.blackboard.tf.ucgreek = alphabets.regular.tf.ucgreek
+
+-- alphabets.blackboard.tf.symbols = alphabets.regular.tf.symbols
+-- alphabets.blackboard.tf.lcgreek = alphabets.regular.tf.lcgreek
+-- alphabets.blackboard.tf.ucgreek = alphabets.regular.tf.ucgreek
+
+alphabets.blackboard.tf.symbols = table.merge(alphabets.regular.tf.symbols, alphabets.blackboard.tf.symbols)
+alphabets.blackboard.tf.lcgreek = table.merge(alphabets.regular.tf.lcgreek, alphabets.blackboard.tf.lcgreek)
+alphabets.blackboard.tf.ucgreek = table.merge(alphabets.regular.tf.ucgreek, alphabets.blackboard.tf.ucgreek)
+
 alphabets.blackboard.it         = alphabets.blackboard.tf
 alphabets.blackboard.bf         = alphabets.blackboard.tf
 alphabets.blackboard.bi         = alphabets.blackboard.bf

[adityam]

Are there any plans to merge the blackboard glyphs to the main font?

[khaledhosny]

Not currently, since I've no time for working on this font right now.