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Sldtoppm User Manual(0) Sldtoppm User Manual(0)
NAME
sldtoppm - convert an AutoCAD slide file to a PPM image
SYNOPSIS
sldtoppm [-adjust] [-dir] [{-height|-ysize} s] [-info] [{-lib|-Lib} name] [-scale s]
[-verbose] [{-width|-xsize} s] [slidefile]
All options can be abbreviated to their shortest unique prefix.
DESCRIPTION
This program is part of Netpbm(1).
sldtoppm reads an AutoCAD(R) slide file and outputs a PPM image. If you don't specify
slidefile, sldtoppm reads input from Standard Input. sldtoppm uses the ppmdraw library to
convert the vector and polygon information in the slide file to a raster; see the file
ppmdraw.h for details on this package.
OPTIONS
-adjust
If the display on which the slide file was created had non-square pixels, when you
process the slide with sldtoppm and don't specify -adjust, sldtoppm issues the fol-
lowing warning;
Warning - pixels on source screen were non-square.
Specifying -adjust will correct the image width to compensate. Specifying the -adjust
option causes sldtoppm to scale the width of the image so that pixels in the resulting PPM
image are square (and hence circles appear as true circles, not ellipses). The scaling is
performed in the vector domain, before scan converting the objects. The results are,
therefore, superior in appearance to what you'd obtain were you to perform the equivalent
scaling with pamscale after the bitmap had been created.
-dir The input is assumed to be an AutoCAD slide library file. A directory listing each
slide in the library is printed on standard error.
-height size
Scales the image in the vector domain so it is size pixels in height. If you don't
specify -width or -xsize, sldtoppm adjusts the width to preserve the pixel aspect
ratio.
-info Dump the slide file header on standard error, displaying the original screen size
and aspect ratio among other information.
-lib name
Extracts the slide with the given name from the slide library given as input. sld-
toppm converts the specified name to upper case.
-Lib name
Extracts the slide with the given name from the slide library given as input. sld-
toppm uses name in the case specified; it does not convert it to upper case.
-scale s
Scales the image by factor s, which may be any floating point value greater than
zero. sldtoppm does the scaling after aspect ratio adjustment, if any. Since it
does the scaling in the vector domain, before rasterisation, the results look much
better than running the output of sldtoppm through pamscale.
-verbose
Dumps the slide file header and lists every vector and polygon to Standard Error.
-width size
Scales the image in the vector domain so it is size pixels wide. If you don't
specify -height or -ysize, sldtoppm adjusts the height to preserve the pixel aspect
ratio.
-xsize size
Scales the image in the vector domain so it is size pixels wide. If you don't
specify -height or -ysize, sldtoppm adjusts the height to preserve the pixel aspect
ratio.
-ysize size
Scales the image in the vector domain so it is size pixels in height. If you don't
specify -width or -xsize, sldtoppm adjusts the width to preserve the pixel aspect
ratio.
LIMITATIONS
sldtoppm can convert only Level 2 slides. Level 1 format has been obsolete since the
advent of AutoCAD Release 9 in 1987, and was not portable across machine architectures.
Slide library items with names containing 8 bit (such as ISO) or 16 bit (Kanji, for exam-
ple) characters may not be found when chosen with the -lib option unless sldtoppm was
built with character set conversion functions appropriate to the locale. You can always
retrieve slides from libraries regardless of the character set by using the -Lib option
and specifying the precise name of library member. Use the -dir option to list the slides
in a library if you're unsure of the exact name.
SEE ALSO
AutoCAD Reference Manual: Slide File Format, pamscale(1), ppm(1)
AUTHOR
John Walker
Autodesk SA
Avenue des Champs-Montants 14b
CH-2074 MARIN
Suisse/Schweiz/Svizzera/Svizra/Switzerland
Usenet:kelvin AT Autodesk.com
Fax:038/33 88 15
Voice:038/33 76 33
Permission to use, copy, modify, and distribute this software and its documentation for
any purpose and without fee is hereby granted, without any conditions or restrictions.
This software is provided "as is" without express or implied warranty.
AutoCAD and Autodesk are registered trademarks of Autodesk, Inc.
DOCUMENT SOURCE
This manual page was generated by the Netpbm tool 'makeman' from HTML source. The master
documentation is at
http://netpbm.sourceforge.net/doc/sldtoppm.html
netpbm documentation 10 October 1991 Sldtoppm User Manual(0)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
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