Re: [Gimp-print-devel] The Truth Behind ESC ( D

[<sh...@al...>]

> There's something here that doesn't make a lot of sense.  Why on earth
> does anyone need to *set* the printer resolution, anyway?  Isn't it
> fundamentally a property of the printer hardware?

Nope.  You figured it out.  That's the trade secret.  It's Epson's new
adjustable with print head.  I just issued the ESC ( D 0xff 0xff 0x01 0x01
command and printed out a new microprocessor microlithography mask at
65535 DPI.  Epson doesn't want you to know that their printers can support
this resolution, since they were planning on gradually re-releasing the
same printer over and over again, over the next 10 years, with just a
simple software change to support higher and higher resolutions.  In
fact, it was so secret, they didn't even tell their developer relations
staff.  Now they're ruined.


Seriously, though, this makes some sense.  In designing the new printer
protocols, they simply moved the printer resolution from each individual
raster transfer to once in the header.  It's a sensible thing to do.

Eric