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From: "Chad Parker (parker DOT charles AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Date: Wed, 27 Jul 2016 08:53:26 -0400
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Subject: Re: [geda-user] [pcb] Font Characters Stored in pcb File?
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Compatibility and consistency are good reasons.

Has the font ever changed before?

Another solution might be to give the font a name, say, "pcb font 2016",
and reference the name of the font in the text definition, or perhaps have
a line somewhere in the file that specifies the font to use in the design.
Then the fonts could be stored internal to pcb. If the font is tweaked,
give it a new name. Existing layouts call out the old name, and get the
intended font. And if someone decided to implement other fonts at some
point, it would also give the user a way to make a selection.

--Chad

On Tue, Jul 26, 2016 at 9:45 PM, Kai-Martin Knaak <kmk AT familieknaak DOT de>
wrote:

> Chad Parker wrote:
>
> > I noticed that when I save a brand new pcb file (File->New,
> > File->Save As...) with nothing in it, just a completely empty file,
> > that the file was actually 30k. When I looked at it, I saw that
> > there appears to be the definition for the default font stored in
> > the file.
> >
> > I was just curious about why this is? What were the considerations
> > that factored into this design decision? I apologize if I missed
> > this somewhere in the docs.
> >
> IMHO, the intention is to make sure layouts  stay exactly the same if
> the pcb it is opened with a different version of pcb. This different
> (future) version may be equipped with a different default font.
>
> A change of fonts is potentially disruptive as text can be placed in
> copper. E.g. a wider font may cause shorts with traces. However,
> because the font actually used is embedded in the file, all copper
> will come out as intended.
>
> That said, when I edit pcb files manually, I find the 30 kB font
> section slightly awkward, too. A solution to achieve a more "clean"
> layout file while still maintaining reliability would be to declare
> the current default font in pcb source to be "static". Developers
> would vow to never change it in future versions of pcb. This is less
> ludicrous than it sounds. There are many more aspects that are never
> to be changed if we want to make sure that old designs still render
> the same with future versions of pcb.
>
> ---<)kaimartin(>---
>
>

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<div dir=3D"ltr"><div>Compatibility and consistency are good reasons.<br><b=
r>Has the font ever changed before?<br><br>Another solution might be to giv=
e the font a name, say, &quot;pcb font 2016&quot;, and reference the name o=
f the font in the text definition, or perhaps have a line somewhere in the =
file that specifies the font to use in the design. Then the fonts could be =
stored internal to pcb. If the font is tweaked, give it a new name. Existin=
g layouts call out the old name, and get the intended font. And if someone =
decided to implement other fonts at some point, it would also give the user=
 a way to make a selection.<br><br></div>--Chad<br></div><div class=3D"gmai=
l_extra"><br><div class=3D"gmail_quote">On Tue, Jul 26, 2016 at 9:45 PM, Ka=
i-Martin Knaak <span dir=3D"ltr">&lt;<a href=3D"mailto:kmk AT familieknaak DOT de"=
 target=3D"_blank">kmk AT familieknaak DOT de</a>&gt;</span> wrote:<br><blockquote=
 class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
d;padding-left:1ex"><span class=3D"">Chad Parker wrote:<br>
<br>
&gt; I noticed that when I save a brand new pcb file (File-&gt;New,<br>
&gt; File-&gt;Save As...) with nothing in it, just a completely empty file,=
<br>
&gt; that the file was actually 30k. When I looked at it, I saw that<br>
&gt; there appears to be the definition for the default font stored in<br>
&gt; the file.<br>
&gt;<br>
&gt; I was just curious about why this is? What were the considerations<br>
&gt; that factored into this design decision? I apologize if I missed<br>
&gt; this somewhere in the docs.<br>
&gt;<br>
</span>IMHO, the intention is to make sure layouts=C2=A0 stay exactly the s=
ame if<br>
the pcb it is opened with a different version of pcb. This different<br>
(future) version may be equipped with a different default font.<br>
<br>
A change of fonts is potentially disruptive as text can be placed in<br>
copper. E.g. a wider font may cause shorts with traces. However,<br>
because the font actually used is embedded in the file, all copper<br>
will come out as intended.<br>
<br>
That said, when I edit pcb files manually, I find the 30 kB font<br>
section slightly awkward, too. A solution to achieve a more &quot;clean&quo=
t;<br>
layout file while still maintaining reliability would be to declare<br>
the current default font in pcb source to be &quot;static&quot;. Developers=
<br>
would vow to never change it in future versions of pcb. This is less<br>
ludicrous than it sounds. There are many more aspects that are never<br>
to be changed if we want to make sure that old designs still render<br>
the same with future versions of pcb.<br>
<br>
---&lt;)kaimartin(&gt;---<br>
<br>
</blockquote></div><br></div>

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