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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@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.

netpbm documentation			 10 October 1991		  Sldtoppm User Manual(0)
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