Re: Lisa Fonts

From: Shirl <shirlgato_at_email.domain.hidden>
Date: Sun, 08 Apr 2007 09:35:57 -0600


Recommend you contact OWEN DENSMORE who I believe worked on the Lisa font system while at Apple. Know he worked on Lisa printing and believe the fonts too.

>From: Ray Arachelian <ray_at_email.domain.hidden>
>To: lisalist_at_email.domain.hidden
>Subject: Re: Lisa Fonts
>Date: Sat, Apr 7, 2007, 4:21 PM

> Rebecca Bettencourt wrote:
>> This is what I've been going on, and so far it has helped decode the
>> font metrics (that information is stored exactly identically), but not
>> the font bitmap itself.
> Ok, so I suppose it would be stored in some similar fashion, but
> figuring it out will be fun. If you can map a specific font's first
> character location, say "!" (since that's ASCII 31) and display that
> same character on LisaEm while in Raw" video mode, it may provide a
> starting point. I'm assuming that the first char in the font is the
> first bit of data that you'll see.
> In terms of printing, this happens vertically, that is an entire line of
> pixels gets printed from left to right. It is possible that LOS does
> the same for the display. It might not, but then they'd need to do lots
> more work converting from horizontal to vertical. This is just a
> guess. There may be another layer of compression on top of this as well...
>> I knew there had to be. :) Thanks! It looks like I can do some
>> recompiling to get what I want out of it.
>> Wait, does this mean the capability was removed, or it was just turned
>> off?
> If you edit glue.c's debug_on() and recompile --with-debug
> --with-tracelog you will be able to use it, but you still need to write
> some code that traps QuickDraw font code and turns the logs on.
> The capability hasn't been removed, but there never was a UI for this
> except in the raw X11 code where control-shift-D would turn the logs on
> and off. That code (lisaem.c) was unpublished and has been replaced by
> the various C++ code (most notably lisaem_wx.cpp and wxui/*), but the
> on/off code very easy to replicate in the current C++ code. Note that
> this would probably not help you as it would capture everything between
> the keypresses which would overshoot what you're looking for and is
> likely to quickly produce several gigabytes of trace log output which
> won't be much fun to read through. (Well, ok I suppose I had lots of
> fun reading it, so maybe you're as insane as I am, in that case, full
> steam ahead!)
> Instead, look for "#ifdef PROCNAME_DEBUG" in reg68k.c and work around
> that area. You'll have to figure out what procedure names you'll want
> to trap on and how the QuickDraw code is entered and which deals with
> fonts, once you do that, you can trap just the code you want, and turn
> on the trace log for that.

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