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99 lines
2.6 KiB
HTML
99 lines
2.6 KiB
HTML
<!doctype HTML public "-//W3O//DTD W3 HTML 2.0//EN">
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<HTML>
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<HEAD>
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<TITLE>gif2bgi</TITLE>
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<link rev=made href=mailto:esr@snark.thyrsus.com>
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</HEAD>
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<BODY>
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Go to <a href="index.html">index page</a>.
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<CENTER><H1>gif2epsn</H1></CENTER>
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A program to dump images saved as GIF files on Epson type printers.<P>
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<H1>Usage:</H1>
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<pre>
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gif2epsn [-q] [-d dither] [-t bw] [-m map] [-i] [-n] [-p printer] [-h] gif-file
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</pre>
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If no gif-file is given, Gif2Epsn will try to read a GIF file from stdin.<p>
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<H1>Memory required:</H1>
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Screen.
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<H1>Options:</H1>
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<DL>
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<DT>[-q]
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<DD> Quiet mode. Default off on MSDOS, on under UNIX. Controls printout
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of running scan lines. Use -q- to invert.<P>
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<DT>[-d dither]
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<DD> Sets size of dithering matrix, where DitherSize can be
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2,3 or 4 only (for 2x2, 3x3 and 4x4 dithering matrices). Default is 2.
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Note image will be displayed in this mode only if the mapping
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option (see -m) selected this mode.<P>
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<DT> [-t bw]
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<DD> Sets threshold level for B&W mapping in percent.
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This threshold level is used in the different mappings as selected via -m.
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Default is 19%.<P>
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<DT> [-m map]
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<DD> Select method to map colors to B&W. Mapping can be:
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<DL>
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<DT>0<DD>
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Every none background color is considered foreground (white color but
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is drawn as black by printer, unless -i is specified).<P>
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<DT>1<DD>
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If 0.3 * RED + 0.59 * GREEN + 0.11 * YELLOW > BW the pixel is
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considered white color.<P>
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<DT>2<DD>
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Colors are mapped as in 1, and use dithering of size as defined using
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-d option. BWthreshold is used here as scaler.<P>
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</DL><P>
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The default is option 0.<P>
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<DT> [-i]
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<DD> Invert the image, i.e. black -> white, white -> black.<P>
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<DT> [-n]
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<DD> Nicer image. Uses double-density feature of Epson printer. This
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takes more time (and kills your ink cartridge faster...) but results
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are usually better.<P>
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<DT> [-p printer]
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<DD> Under Unix, output goes to stdout by default; under DOS, the
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default is LPT1:. With this switch you can specify the output
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target.<P>
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<DT> [-h]
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<DD> print one line of command line help, similar to Usage above.<P>
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</DL>
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<H1>Notes:</H1>
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The output has an aspect ratio of 1, so a square image will be square in
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hardcopy as well.<P>
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The widest image can be printed is 640 pixels, on 8 inch paper. You
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probably will need to flip wider images, if height is less than that:
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`<a href="gifflip.html">gifflip</a> -r x29.gif | gif2epsn'. Wider
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images will be clipped.<P>
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<H1>Author:</H1>
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Gershon Elber
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<HR>
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<ADDRESS>Eric S. Raymond <A HREF="mailto:esr@thyrsus.com"><esr@snark.thyrsus.com></A></ADDRESS>
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</BODY>
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</HTML>
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