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sldtoppm(1) AMIGA (10 October 1991) sldtoppm(1)
NAME
sldtoppm - convert an AutoCAD slide file into a portable
pixmap
SYNOPSIS
sldtoppm [-adjust] [-dir] [-height|-ysize s] [-info] [-
lib|-Lib name] [-scale s] [-verbose] [-width|-xsize
s] [slidefile]
DESCRIPTION
Reads an AutoCAD(Reg.) slide file and outputs a portable
pixmap. If no slidefile is specified, input is read from
standard input. The ppmdraw library is used to convert the
vector and polygon information in the slide file to a
pixmap; 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 the slide is processed with
sldtoppm and the -adjust option is not present, the
following warning will appear:
Warning - pixels on source screen were non-square.
Specifying -adjust will correct image width to
compensate.
Specifying the -adjust option causes sldtoppm to scale
the width of the image so that pixels in the resulting
portable pixmap 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 pnmscale 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 no -width or -xsize option is
specified, the width will be adjusted 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
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sldtoppm(1) AMIGA (10 October 1991) sldtoppm(1)
library given as input. The specified name is
converted to upper case.
-Lib name
Extracts the slide with the given name from the slide
library given as input. The name is used exactly as
specified; it is not converted to upper case.
-scale s
Scales the image by factor s, which may be any floating
point value greater than zero. Scaling is done after
aspect ratio adjustment, if any. Since scaling is
performed in the vector domain, before rasterisation,
the results look much better than running the output of
sldtoppm through pnmscale.
-verbose
Dumps the slide file header and lists every vector and
polygon in the file on standard error.
-width size
Scales the image in the vector domain so it is size
pixels wide. If no -height or -ysize option is
specified, the height will be adjusted to preserve the
pixel aspect ratio.
-xsize size
Scales the image in the vector domain so it is size
pixels wide. If no -height or -ysize option is
specified, the height will be adjusted to preserve the
pixel aspect ratio.
-ysize size
Scales the image in the vector domain so it is size
pixels in height. If no -width or -xsize option is
specified, the width will be adjusted to preserve the
pixel aspect ratio.
All flags can be abbreviated to their shortest unique
prefix.
BUGS
Only Level 2 slides are converted. 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 has
been 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
Page 2 (printed 3/1/94)
sldtoppm(1) AMIGA (10 October 1991) sldtoppm(1)
-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, pnmscale(1),
ppm(5)
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, 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.
Page 3 (printed 3/1/94)