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Re: [Gimp-print-devel] The Truth Behind ESC ( D
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From: Karl H. K. <kh...@kh...> - 2000-03-03 00:47:41
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It looks like nL=3D64 an nH=3D56 it is very easy to create all the
resolutions:
v or h -> resolution
120 1 / 120
40 1 / 360
20 1 / 720
10 1 / 1440
The static string in print-escp2.c uses a vertical resolution of=20
1/360 and a horizontal resolution of 1/120.=20
Is it possible that this is the reason why the STC740 has a
MODEL_MAKE_XRES(360) in it's capabilities? This makes it impossible
to get to the 'good' 1440dpi modes with this printer, whereas the
640 does allow to use these modes. This is of course a bit unfair
to the owners of the more expensive printer :-)
Is there anything I can try to prove this theory? I don't really
understand what the driver is doing with all these different
resolutions, so I probably need some theory first...
Karl Heinz
On Thu, Mar 02, 2000 at 10:38:22AM -0500, Karl Heinz Kremer wrote:
> I just received this information from EPSON regarding the ESC ( D
> command:=20
>=20
> >=20
> > The ESC (D command is supposed to be "secret". That is, we cannot
> release
> > information on it without a Non-Disclosure Agreement. However, by
> looking
> > at a description of the command, I cannot justify withholding it.=20
> It
> > doesn't make sense to me that knowing how to use this command will
> allow the
> > public in on a trade secret of any kind. If anything, it will allow
> us to
> > capitalize on the talents of the Linux community to develop better
> drivers
> > for us. Our liaison from Japanese HQ agrees with me. So here is
> the info
> > you wanted.
> >=20
> > ESC (D nL nH rL rH v h [Set resolution of raster image]
> > nL=3D04H, nH=3D00H
> > 0<=3Dv<=3D127
> > 0<=3Dh<=3D127
> > vertical resolution is v/(rH*256+rL) inch
> > horizontal resolution is h/(rH*256+rL) inch
> > available resolutions are (depending on model):
> > 1/120, 1/180, 1/360, 1/720, 1/1440
>=20
>=20
> Karl Heinz
--=20
Karl Heinz Kremer kh...@kh...
http://www.khk.net
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