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gif2epsn
A program to dump images saved as GIF files on Epson type printers.
Usage:
gif2epsn [-q] [-d dither] [-t bw] [-m map] [-i] [-n] [-p printer] [-h] gif-file
If no gif-file is given, Gif2Epsn will try to read a GIF file from stdin.
Memory required:
Screen.
Options:
- [-q]
-  Quiet mode.  Default off on MSDOS, on under UNIX. Controls printout
   of running scan lines. Use -q- to invert.
 
- [-d dither]
-  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.
 
-  [-t bw]
-  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%.
 
-  [-m map]
-  Select method to map colors to B&W.  Mapping can be:
	
	- 0
- 
	Every none background color is considered foreground (white color but
	is drawn as black by printer, unless -i is specified).
	 
- 1
-  
	If 0.3 * RED + 0.59 * GREEN + 0.11 * YELLOW > BW the pixel is
	considered white color.
	 
- 2
- 
	Colors are mapped as in 1, and use dithering of size as defined using
	-d option.  BWthreshold is used here as scaler.
	 
 
The default is option 0. 
 
-  [-i]
-  Invert the image, i.e.  black -> white, white -> black.
 
-  [-n]
-  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 printer]
-  Under Unix, output goes to stdout by default; under DOS, the
     default is LPT1:.  With this switch you can specify the output
     target.
 
-  [-h]
-  print one line of command line help, similar to Usage above.
 
Notes:
The output has an aspect ratio of 1, so a square image will be square in
hardcopy as well.
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:
`gifflip -r x29.gif | gif2epsn'.  Wider
images will be clipped.
Author:
Gershon Elber
Eric S. Raymond <esr@snark.thyrsus.com>