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Go to <a href="index.html">index page</a>.
<CENTER><H1>gif2epsn</H1></CENTER>
A program to dump images saved as GIF files on Epson type printers.<P>
<H1>Usage:</H1>
<pre>
gif2epsn [-q] [-d dither] [-t bw] [-m map] [-i] [-n] [-p printer] [-h] gif-file
</pre>
If no gif-file is given, Gif2Epsn will try to read a GIF file from stdin.<p>
<H1>Memory required:</H1>
Screen.
<H1>Options:</H1>
<DL>
<DT>[-q]
<DD> Quiet mode. Default off on MSDOS, on under UNIX. Controls printout
of running scan lines. Use -q- to invert.<P>
<DT>[-d dither]
<DD> Sets size of dithering matrix, where DitherSize can be
2,3 or 4 only (for 2x2, 3x3 and 4x4 dithering matrices). Default is 2.
Note image will be displayed in this mode only if the mapping
option (see -m) selected this mode.<P>
<DT> [-t bw]
<DD> Sets threshold level for B&W mapping in percent.
This threshold level is used in the different mappings as selected via -m.
Default is 19%.<P>
<DT> [-m map]
<DD> Select method to map colors to B&W. Mapping can be:
<DL>
<DT>0<DD>
Every none background color is considered foreground (white color but
is drawn as black by printer, unless -i is specified).<P>
<DT>1<DD>
If 0.3 * RED + 0.59 * GREEN + 0.11 * YELLOW > BW the pixel is
considered white color.<P>
<DT>2<DD>
Colors are mapped as in 1, and use dithering of size as defined using
-d option. BWthreshold is used here as scaler.<P>
</DL><P>
The default is option 0.<P>
<DT> [-i]
<DD> Invert the image, i.e. black -> white, white -> black.<P>
<DT> [-n]
<DD> Nicer image. Uses double-density feature of Epson printer. This
takes more time (and kills your ink cartridge faster...) but results
are usually better.<P>
<DT> [-p printer]
<DD> Under Unix, output goes to stdout by default; under DOS, the
default is LPT1:. With this switch you can specify the output
target.<P>
<DT> [-h]
<DD> print one line of command line help, similar to Usage above.<P>
</DL>
<H1>Notes:</H1>
The output has an aspect ratio of 1, so a square image will be square in
hardcopy as well.<P>
The widest image can be printed is 640 pixels, on 8 inch paper. You
probably will need to flip wider images, if height is less than that:
`<a href="gifflip.html">gifflip</a> -r x29.gif | gif2epsn'. Wider
images will be clipped.<P>
<H1>Author:</H1>
Gershon Elber
<HR>
<ADDRESS>Eric S. Raymond <A HREF="mailto:esr@thyrsus.com"><esr@snark.thyrsus.com></A></ADDRESS>
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