06-01-2013
Could pls check now...
---------- Post updated at 04:26 PM ---------- Previous update was at 04:26 PM ----------
Quote:
Originally Posted by
Don Cragun
I don't understand!
First, please use code tags around the file contents; not around the contents AND the descriptions of the contents.
Second, are you saying that your input files contain code to change font and color; or is that just something you added to confuse us? Do we really have to parse the font and color changes within these lines so we not only copy changes to text but also possible changes to font, color, boldness, and italicization?
Third, you say that comment lines are to be ignored, but instead of ignoring them in the output, you add a space to the start of comment lines??? What do you mean by ignore: Do not change comment lines, or delete comment lines?
Fourth why would you limit us to using sed for this? Your specification of what is supposed to happen is ambiguous, but it seems that awk would be a much better tool for this job.
Could pls check now..
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LEARN ABOUT OSX
ppmtosixel
ppmtosixel(1) General Commands Manual ppmtosixel(1)
NAME
ppmtosixel - convert a portable pixmap into DEC sixel format
SYNOPSIS
ppmtosixel [-raw] [-margin] [ppmfile]
DESCRIPTION
Reads a portable pixmap as input. Produces sixel commands (SIX) as output. The output is formatted for color printing, e.g. for a DEC
LJ250 color inkjet printer.
If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled. A printer control header and a color assignment table
begin the SIX file. Image data is written in a compressed format by default. A printer control footer ends the image file.
OPTIONS
-raw If specified, each pixel will be explicitly described in the image file. If -raw is not specified, output will default to com-
pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands. A raw file is often an order of magni-
tude larger than a compressed file and prints much slower.
-margin
If -margin is not specified, the image will be start at the left margin (of the window, paper, or whatever). If -margin is speci-
fied, a 1.5 inch left margin will offset the image.
PRINTING
Generally, sixel files must reach the printer unfiltered. Use the lpr -x option or cat filename > /dev/tty0?.
BUGS
Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion. If the original PPM maxval was
greater than 100, rescaling also reduces the image depth. While the actual RGB values from the ppm file are more or less retained, the
color palette of the LJ250 may not match the colors on your screen. This seems to be a printer limitation.
SEE ALSO
ppm(5)
AUTHOR
Copyright (C) 1991 by Rick Vinci.
26 April 1991 ppmtosixel(1)