Sldtoppm User Manual(0) Sldtoppm User Manual(0)NAMEsldtoppm - convert an AutoCAD slide file to a PPM image
SYNOPSISsldtoppm [-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® 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 following warning;
Warning - pixels on source screen were non-square.
Specifying -adjust will correct the image width to compensate. Speci‐
fying 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 per‐
formed 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 bit‐
map 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 stan‐
dard 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. sldtoppm converts the specified name to upper
case.
-Lib name
Extracts the slide with the given name from the slide library
given as input. sldtoppm 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 vec‐
tor 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.
LIMITATIONSsldtoppm 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 example) 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@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, with‐
out any conditions or restrictions. This software is provided 'as is'
without express or implied warranty.
AutoCAD and Autodesk are registered trademarks of Autodesk, Inc.
netpbm documentation 10 October 1991 Sldtoppm User Manual(0)
