# man > sldtoppm(1) > **TLDR:** Convert an AutoCAD slide file to a PPM image. > - Convert an SLD file to a PPM image: `sldtoppm {{path/to/input.sld}} > {{path/to/output.ppm}}` - Compensate for non-square pixels by scaling the width of the image: `sldtoppm {{-a|-adjust}} {{path/to/input.sld}} > {{path/to/output.ppm}}` *Source: tldr-pages* --- _Sldtoppm_ _User_ [_Manual_(1)](https://www.chedong.com/phpMan.php/man/Manual/1/markdown) General Commands Manual _Sldtoppm_ _User_ [_Manual_(1)](https://www.chedong.com/phpMan.php/man/Manual/1/markdown) ## NAME sldtoppm - convert an AutoCAD slide file to a PPM image ## SYNOPSIS **sldtoppm **[**-adjust**] [**-dir**] [{**-height**|**-ysize**} _s_] [**-info**] [{**-lib**|**-Lib**} _name_] [**-scale _**s_] [**-ver‐** **bose**] [{**-width**|**-xsize**} _s_] [_slidefile_] All options can be abbreviated to their shortest unique prefix. ## DESCRIPTION This program is part of [**Netpbm**(1)](https://www.chedong.com/phpMan.php/man/Netpbm/1/markdown). **sldtoppm **reads an AutoCAD® slide file and outputs a PPM image. If you don't specify _slide‐_ _file_, **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 In addition to the options common to all programs based on libnetpbm (most notably **-quiet**, see ]8;;index.html#commonoptions\ Common Options]8;;\ ), **sldtoppm **recognizes the following command line 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 follow‐ ing 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 slide in the library is printed on standard error. ### -height _ 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 ra‐ tio. ### -info aspect ratio among other information. ### -lib _ Extracts the slide with the given _name_ from the slide library given as input. **sld‐** **toppm **converts the specified _name_ to upper case. ### -Lib _ 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 _ 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 _ 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 _ 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 _ 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 ra‐ tio. ## 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 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)](https://www.chedong.com/phpMan.php/man/pamscale/1/markdown), [**ppm**(1)](https://www.chedong.com/phpMan.php/man/ppm/1/markdown) ## AUTHOR John Walker Autodesk SA Avenue des Champs-Montants 14b CH-2074 MARIN Suisse/Schweiz/Svizzera/Svizra/Switzerland **Usenet:_** **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. ## DOCUMENT SOURCE This manual page was generated by the Netpbm tool 'makeman' from HTML source. The master documentation is at **** netpbm documentation 10 October 1991 _Sldtoppm_ _User_ [_Manual_(1)](https://www.chedong.com/phpMan.php/man/Manual/1/markdown)