HiDPI in Terminal.app

[Steven R. Baker]

Heya,

I've been hacking on Terminal.app a bit, to try and get it working in 
HiDPI.  The problem is that the cell size seems to be set correctly 
according to the scale, but when the characters are rendered they are 
*not* scaled.  You wind up with a large character cell, with a character 
in the bottom left corner of it, and gaps everywhere.

I think I have it working, but the solution doesn't feel right. You can 
see it here: 
https://github.com/srbaker/gap/commit/8fe99150704a10d6b3b6b70947361376dcc3c819 
If this *is* appropriate, I'll generate a patch and sign the copyright 
assignment stuff, etc.

Some explanation, so you can follow along my thinking.  In 
TerminalView.m, the characterCellSize class method sets the size of a 
character cell correctly.  I suspect that this because 
boundingRectForFont knows the scale factor, but the DPSshow() call 
(around line 728 in my edited file, inside drawRect:) does *not* know 
what the scale factor is because it doesn't know the scale factor.

I feel like the correct thing to do here is to handle scaling in DPS, 
but at this point I'm quite over my head.  Thoughts, please. I'm willing 
to do the work, but I just feel like I'm barking up the wrong tree here...

Cheers!

-Steven