Re: Use GhostScript API instead of forking (issue 548030043 by address@hidden)

[jonas . hahnfeld]

https://codereview.appspot.com/548030043/diff/583830043/lily/general-scheme.cc
File lily/general-scheme.cc (right):

https://codereview.appspot.com/548030043/diff/583830043/lily/general-scheme.cc#newcode783
lily/general-scheme.cc:783: command += "(" + ly_scm2string (input) + ")
run";
On 2020/05/01 06:42:43, hanwenn wrote:
> This doesn't hook very deeply into GS internals or how we arrange the
page.
> Could we get the same speedup by putting the batching into an
encompassing .ps
> file, and calling GS on that file once?

I think this would require substantial refactoring of how LilyPond
works. As far as I understand, currently each input file is handled
separately and temporary files are deleted after processing. To get
similar speedup, we have to reuse the interpreter for the complete run
of LilyPond.

> Also: is there a GPL'd version of Ghostscript for which this works?

GPL Ghostscript 9.06 from 2012 is apparently the last GPL version. You
probably don't want to stick with dependencies of that age ;-)

https://codereview.appspot.com/548030043/