Somehow funny to read that mail, beause that's pretty exactly the point
[2] where my non-ft-based, dirty, low priority OMA sub-project [1] about
typewriting currently hangs (besides of course a lot of more
shortcomings, most notable here with gsub processing implementation,
again some more topic that comes with a lot of reliance on MS design
decisions and their documentation).
Luckily, a lot of the topic is unicode specified [3], so there isn't so
much "freedom of choice"-burden on first sight (specificly if you treat
dependence on harfbuzz fixed). Well, "luckily" assuming unicode is
conservative enough about definitions.
[1] https://gitlab.com/janbruns/gui4pas/-/tree/main/imgsrc/ttf
[2]
https://gitlab.com/janbruns/gui4pas/-/blob/main/imgsrc/parapgraphlayouter.pas
[3]
https://gitlab.com/janbruns/gui4pas/-/blob/main/misc/unicode/paragraphmanager.pas
On 14.08.24 21:04, Hin-Tak Leung wrote:
There was a recent enquiry about the availability of skia's
skparagraph functionality in skia-python, so I did some digging and
added that to the next skia-python release. (m129/130 in about two
months' time, when skia m130 get forked by google).
For those who doesn't know what it is (that includes me two weeks
ago...), skia's skparagraph offers multi-line text layout, with a
variety of alignment options (left/right, centered, justified), and
decorations (underline/strikethrough). I guess that functionality is
probably somewhat equivalent to pango's role. Skia's skparagraph is
based on freetype/harfbuzz so can mostly "do the right thing" with the
middle-eastern languages on line-breaks, etc. Have a try with Arabic /
Hebrew etc if you feel like it. I did.
This is mostly a RFC / request for testers etc. The main info and
source code is at https://github.com/kyamagu/skia-python/pull/258 ,
and example program at
https://github.com/HinTak/skia-python-examples/blob/main/shape_text.py
. Prebuilt python wheels is at
https://github.com/kyamagu/skia-python/actions/runs/10355210169 for
the three major platforms, linux, windows, mac os x.
The quickest way for people to try it out is simply download one of
the relevant wheels, install it, and play with the example. (edit it
with your own text for rendering, setting various options, then run
"shape_text.py chosen-font.ttf output.png").
Note that most of the problems with documentations, and additional
functions, neither https://github.com/kyamagu/skia-python/ nor
https://github.com/HinTak/skia-python-examples/ is the correct place:
see https://issues.skia.org/358587937 and
https://issues.skia.org/307357528 - we basically replicate upstream's
API / documentations, so it needs to be in Google's skia repo first.
Thanks for reading so far.
