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 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 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
-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.