On 4/20/2018 8:24 AM, Henri Menke wrote:
On Fri, 2018-04-20 at 07:47 +0200, Herbert Voss wrote:
Am 20.04.2018 um 05:52 schrieb Henri Menke:
I'm trying to determine the kerning between two letters (here A and V). For
the
sake of this example I'm inserting negative kerning of -400/1000 em.
However,
when I examine the kern in the kerning callback this massive enhancement of
the
negative kern doesn't show up but I only see the kerning from the font
itself.
How can I access the user-defined kerns? MWE is below.
no problem with
No, that is not my problem. The kern is correct in the output. However, I
cannot inspect the kern from within the "kerning" callback. The user-defined
kern is not added inside the kerning callback and I want to know how to query it
(see the line annotated with <--).
the kerning and ligaturing callbacks are for text (an deven then only
make sense for traditional fonts with a kern and ligature table)
rendering math is done completely different and is a two pass process;
there are often two code paths, one for traditonal math and one for
opentype and opentype
kerning/glueing there is done based on character classes, math
parameters and specific font information (the initial math list is more
complex than a textual node list)
eventualy the typoeset math becomes a sequence of regular nodes injected
in the list that makes a paragraph
Hans
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