Re: [Gimp-print-devel] Epson Stylus Photo 1270 Paper Margins with 3.1.4.

[Robert L K. <rl...@al...>]

   Date: Thu, 08 Jun 2000 11:40:23 +0100
   From: Ralph Corderoy <ra...@in...>

   Did you see the PostScript that reproduces the problem at the end of my
   message?  I'll try and explain the result.  I print crosses at certain
   points on the page;  two lines, one horizontal, one vertical.  At some
   locations the horizontal line fails to appear *completely*.  This
   suggests some horizontal rows are being missed.  Similarly, the
   diagonal line has many small gaps.  It's as if drawn with a very long,
   erratic, dash pattern, again suggesting some horizontal rows are being
   missed.

I think I understand.  I suggested using -r1440.  This means that
Ghostscript uses both a horizontal and vertical resolution of 1440
dpi.  However, quality=7 is only 720 dpi vertically, so every other
horizontal row will be missed.

Two things to try:

1) Use -r720.  This will do 720 dpi in Ghostscript.

2) Use -dQuality=8.  This mode, called "1440x720 enhanced", actually
samples at 1440x1440.

   I'd guess that this is because the PostScript is drawing lines with a
   line width of zero;  defined to be the thinnest line width the output
   device supports.  Perhaps the stp driver is over estimating how thin
   this line can be?

It isn't the stp driver; it doesn't know anything about Postscript or
line widths.

-- 
Robert Krawitz <rl...@al...>      http://www.tiac.net/users/rlk/

Tall Clubs International  --  http://www.tall.org/ or 1-888-IM-TALL-2
Member of the League for Programming Freedom -- mail lp...@uu...
Project lead for The Gimp Print --  http://gimp-print.sourceforge.net

"Linux doesn't dictate how I work, I dictate how Linux works."
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