Before xous-ipc's fixed-length string guaranteed this thing
fit into a single page. Now, we can send potentially unbounded
amounts of text between servers.
I don't think it makes sense to send more than a few k of text to
render on the screen at once, given our screen sizes, so I've added
a patch that truncates the text to the previous length that things
would truncate to.
The behavior is the same as before, except that you will
over-allocate memory on the heap in the sending process
as you shove more string data into a TextView than can be rendered.
Previously, the TextView would just truncate the data and discard
the data.
The truncation happens at the point where you try to hand the
record off to another process, so, one could in theory try
to make this recoverable by adding a layer that splits the
textview into more manageable chunks or pages the data, but that
is an exercise for another day.
there's something....weird....going on in the initializers
here and ... something about configurations not being
applicable to expressions??
i'm a little confused, but, the original work-around I had to
this isuse somehow side-effected things in some way that I didn't
expect. this reverts those side effects.
a "small" memory target is created, which maps only a subset
of fonts to memory for targets that have extremely limited amounts
of on-chip storage.
the main thing I'm not happy about with this change is that the
origin offset of the font table is hard-coded into the template,
but also, I'm not quite sure if there's a better way to do this
that doesn't make things unnecessarily complicated. The origin
offset *is* target specific, and the templates already
reference targets specifically in the config lists...so if this
were to be made more generic, the path you'd end up on is something
like parsing link.x files out of various configurations which seems
like an extreme amount of work for a constant that rarely changes.
So, it's a footgun, but one where mending the foot is several times
less effort than putting a safety on the footgun.
