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Date: Sat, 6 Sep 2014 15:58:35 +0930
Message-ID: <CAHUm0tOhuv+75YZgbTnLihnJ8s9SPTPEA4+fMpMQ2BjZ4p1bRA@mail.gmail.com>
Subject: Re: [geda-user] Chinese glyph rendering in pcb as symbols
From: Erich Heinzle <a1039181 AT gmail DOT com>
To: geda-user <geda-user AT delorie DOT com>
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>
> But to do a bitmap font, we'd need to convert each pixel into a
> separate polygon (square).
>
> The gerbers for either solution would be huge, though.  Simple stroked
> fonts (like pcb's default) are pretty gerber-friendly.
>

My parsing code turns contiguous vertical, diagonal and horizontal pixels
in the 16x16 bitmap stored in a bdf format into pcb strokes. That is how
the example I attached yesterday was done.

The example attachment also showed a "dot matrix" version of the glyphs for
comparison, if the bitmap is done without conversion into strokes.
Converting bitmap pixels to strokes as I have done is more evolved than dot
matrix, and less evolved than outline fonts, but it scales without losing
legibility and relies on gerber friendly strokes only.

Polygons would enable perfect rendering of outline fonts, but would be less
compact, and the symbol rendering code then has to be extended to support
polygons as well.

It seems the gnu project have released the unifont, which includes the
chinese characters, as a bdf.tar.gz file at

http://unifoundry.com/unifont.html

which, with the right parsing code, could generate stroked pcb symbols for
any of the unifont bitmaps.

Anyway, perhaps a native chinese speaker/reader/user is needed to opine on
the utility of bitmapped fonts or the need for more elegant outline fonts.

Cheers,

Erich.

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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><div class=3D"gmail_quote">=
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
But to do a bitmap font, we&#39;d need to convert each pixel into a<br>
separate polygon (square).<br>
<br>
The gerbers for either solution would be huge, though.=C2=A0 Simple stroked=
<br>
fonts (like pcb&#39;s default) are pretty gerber-friendly.<br>
</blockquote></div><br></div><div class=3D"gmail_extra">My parsing code tur=
ns contiguous vertical, diagonal and horizontal pixels in the 16x16 bitmap =
stored in a bdf format into pcb strokes. That is how the example I attached=
 yesterday was done.<br><br>The example attachment also showed a &quot;dot =
matrix&quot; version of the glyphs for comparison, if the bitmap is done wi=
thout conversion into strokes. Converting bitmap pixels to strokes as I hav=
e done is more evolved than dot matrix, and less evolved than outline fonts=
, but it scales without losing legibility and relies on gerber friendly str=
okes only.<br><br></div><div class=3D"gmail_extra">Polygons would enable pe=
rfect rendering of outline fonts, but would be less compact, and the symbol=
 rendering code then has to be extended to support polygons as well.<br><br=
>It seems the gnu project have released the unifont, which includes the chi=
nese characters, as a bdf.tar.gz file at<br>=C2=A0<br><a href=3D"http://uni=
foundry.com/unifont.html">http://unifoundry.com/unifont.html</a><br><br></d=
iv><div class=3D"gmail_extra">which, with the right parsing code, could gen=
erate stroked pcb symbols for any of the unifont bitmaps.<br><br></div><div=
 class=3D"gmail_extra">Anyway, perhaps a native chinese speaker/reader/user=
 is needed to opine on the utility of bitmapped fonts or the need for more =
elegant outline fonts.<br><br></div><div class=3D"gmail_extra">Cheers,<br><=
br>Erich.<br></div></div>

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