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Diffstat (limited to 'tex/context/base/mkxl/math-act.lmt')
| -rw-r--r-- | tex/context/base/mkxl/math-act.lmt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/tex/context/base/mkxl/math-act.lmt b/tex/context/base/mkxl/math-act.lmt index b0243719e..8fdd6ca5a 100644 --- a/tex/context/base/mkxl/math-act.lmt +++ b/tex/context/base/mkxl/math-act.lmt @@ -1190,6 +1190,21 @@ do end + +-- In TeX The Program we find in section 543 a remark about the second use of math +-- italic: it is always added to the width except with respect to the position of +-- the subscript. That paragraph also mentions that the number of different widths +-- is normally small so they can be shared (there is an eight bit index into a width +-- array). Actually the limits of at most 16 heights and depths has as side effect +-- that we get some snapping of sizes. Now, because many math characters have an +-- italic correction, the saving on shared widths is negated by the amount of (at +-- most 64) italics. So in practice there is no gain and the italic correction could +-- have served as bottom kern. We think that the following approach (that we actualy +-- came to by a different reasonsing: inconsistent open type fonts) is quite valid +-- and robust. It's just that the opentype math fonts should never have gone that +-- TeX italic route. Italic usage is more clear from section 543 than from the math +-- rendering code. + do local function wipe(whatever,target,original,parameters,field,move,integrals) |