sldtoppm - convert an AutoCAD slide file into a portable
pixmap
sldtoppm
[-adjust] [-dir] [-height|-ysize s]
[-info] [-lib|-Lib name] [-scale
s] [-verbose] [-width|-xsize s]
[slidefile]
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.
- -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.
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.
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:
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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.
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Inc.