Should then \setupalign[granular] be used before defining font features? On Thu, Jun 22, 2023 at 9:37 AM Hans Hagen via ntg-context <ntg-context@ntg.nl> wrote: > > Hi, > > I uploaded a new lmtx version (so the next series will be luametatex > 2.10.10). Although Mikael and I are still in improving math mode, we > side tracked a bit to the par builder (better breaking of math etc). In > the end some experiments there turned features. > > (1) We already had a more granular par builder but that was never really > enabled. From now on you can do that with > > \setupalign[granular] > > After quite some tests and careful inspection of outcome we think that > the results look better, which is why if could become a default. The > main impact is a bit more even spacing between neighbouring lines, > because we operate in five instead of three ranges of primary badness now. > > (2) As side effect of (3) initialization of expansion (as well as > compression and protrusion) is delayed till it kicks in. This means that > > \definefontfeature[default][default][expansion=quality] > > has become cheaper and might as well become the default. > > (3) The biggest new feature (already known to some of you as we chat > about it) is that in addition to the (upto three) passes that create a > paragraph we can now have extra ones. This is discussed in > lowlevel-lines.pdf (preliminary). The second pass is the most important > one (it uses hyphenation but not yet emergency stretch) and, based on > criteria that can be set, between the second and third pass multiple > attempts can be triggered. > > So, for instance one can start careful (pass one), less careful (pass > two), test all kind of variants (pass 2 subpasses) etc. These subpasses > can have different tolerances, demerits, expansion, etc and quit once > soem criteria are met. > > The problem here is: what makes good defaults. Therefore we have some > tests definitions added (see spac-pas-tests) that we hope users will > test on realistic documents. > > In case one wonders: performance is quite okay and you won't notice much > difference on a reasonable run. Also, when you normally use expansion > for a whole document, you can now let it kick in more selectively. As a > result a run can be faster and the resulting pdf file can be smaller. > This feature kind of assumes (1) above. > > (4) There's also a new feature for optional content: you can have marked > sections in a paragraph that can be enabled or disabled in attempts to > get better output. Of course one can wonder it this is useful but it was > one of the older todo's. When it is considered usefull it can evolve. > > (The lowlevel-lines manual is work in progress and in a few weeks we > will pick up on that.) > > Hans > > ----------------------------------------------------------------- > Hans Hagen | PRAGMA ADE > Ridderstraat 27 | 8061 GH Hasselt | The Netherlands > tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl > ----------------------------------------------------------------- > ___________________________________________________________________________________ > If your question is of interest to others as well, please add an entry to the > Wiki! > > maillist : ntg-context@ntg.nl / > https://www.ntg.nl/mailman/listinfo/ntg-context > webpage : https://www.pragma-ade.nl / http://context.aanhet.net > archive : https://bitbucket.org/phg/context-mirror/commits/ > wiki : https://contextgarden.net > ___________________________________________________________________________________
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