forked from Mirrors/freeswitch
160 lines
4.6 KiB
Groff
160 lines
4.6 KiB
Groff
.\" $Id: fax2ps.1,v 1.4 2006-04-20 12:17:19 dron Exp $
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.\"
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.\" Copyright (c) 1991-1997 Sam Leffler
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.\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
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.\"
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.\" Permission to use, copy, modify, distribute, and sell this software and
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.\" its documentation for any purpose is hereby granted without fee, provided
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.\" that (i) the above copyright notices and this permission notice appear in
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.\" all copies of the software and related documentation, and (ii) the names of
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.\" Sam Leffler and Silicon Graphics may not be used in any advertising or
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.\" publicity relating to the software without the specific, prior written
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.\" permission of Sam Leffler and Silicon Graphics.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
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.\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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.\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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.\"
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.\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
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.\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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.\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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.\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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.\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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.\" OF THIS SOFTWARE.
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.\"
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.ds Ps PostScript
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.if n .po 0
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.TH FAX2PS 1 "November 2, 2005" "libtiff"
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.SH NAME
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fax2ps \- convert a
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.SM TIFF
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facsimile to compressed \*(Ps\(tm
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.SH SYNOPSIS
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.B fax2ps
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[
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.I options
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] [
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.I file ...\&
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]
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.SH DESCRIPTION
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.I fax2ps
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reads one or more
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.SM TIFF
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facsimile image files and prints a compressed form of
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\*(Ps on the standard output that is suitable for printing.
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.PP
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By default, each page is scaled to reflect the
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image dimensions and resolutions stored in the file.
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The
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.B \-x
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and
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.B \-y
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options can be used to specify the horizontal and vertical
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image resolutions (lines/inch), respectively.
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If the
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.B \-S
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option is specified, each page is scaled to fill an output page.
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The default output page is 8.5 by 11 inches.
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Alternate page dimensions can be specified in inches with the
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.B \-W
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and
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.B \-H
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options.
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.PP
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By default
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.I fax2ps
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generates \*(Ps for all pages in the file.
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The
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.B \-p
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option can be used to select one or more pages from
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a multi-page document.
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.PP
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.I fax2ps
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generates a compressed form of \*(Ps that is
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optimized for sending pages of text to a \*(Ps
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printer attached to a host through a low-speed link (such
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as a serial line).
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Each output page is filled with white and then only
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the black areas are drawn.
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The \*(Ps specification of the black drawing operations
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is optimized by using a special font that encodes the
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move-draw operations required to fill
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the black regions on the page.
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This compression scheme typically results in a substantially
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reduced \*(Ps description, relative to the straightforward
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imaging of the page with a \*(Ps
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.I image
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operator.
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This algorithm can, however, be ineffective
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for continuous-tone and white-on-black images.
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For these images, it sometimes is more efficient to send
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the raster bitmap image directly; see
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.BR tiff2ps (1).
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.SH OPTIONS
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.TP 10
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.BI \-p " number"
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Print only the indicated page.
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Multiple pages may be printed by specifying
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this option more than once.
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.TP 10
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.BI \-x " resolution"
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Use
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.I resolution
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as the horizontal resolution, in dots/inch, of the image data.
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By default this value is taken from the file.
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.TP 10
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.BI \-y " resolution"
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Use
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.I resolution
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as the vertical resolution, in lines/inch, of the image data.
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By default this value is taken from the file.
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.TP 10
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.B \-S
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Scale each page of image data to fill the output page dimensions.
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By default images are presented according to the dimension
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information recorded in the
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.SM TIFF
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file.
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.TP 10
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.BI \-W " width"
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Use
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.I width
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as the width, in inches, of the output page.
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.TP 10
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.BI \-H " height"
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Use
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.I height
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as the height, in inches, of the output page.
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.SH DIAGNOSTICS
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Some messages about malformed
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.SM TIFF
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images come from the
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.SM TIFF
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library.
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.PP
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Various messages about badly formatted facsimile images
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may be generated due to transmission errors in received
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facsimile.
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.I fax2ps
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attempts to recover from such data errors by resynchronizing
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decoding at the end of the current scanline.
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This can result in long horizontal black lines in the resultant
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\*(Ps image.
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.SH NOTES
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If the destination printer supports \*(Ps Level II then
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it is always faster to just send the encoded bitmap generated
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by the
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.BR tiff2ps (1)
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program.
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.SH BUGS
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.I fax2ps
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should probably figure out when it is doing a poor
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job of compressing the output and just generate
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\*(Ps to image the bitmap raster instead.
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.SH "SEE ALSO"
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.BR tiff2ps (1),
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.BR libtiff (3)
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.PP
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Libtiff library home page:
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.BR http://www.remotesensing.org/libtiff/
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