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- PCX transformations from command-line
-
- PCXUTILS offers a number of simple-minded transformations on monochrome and
- 16-color PCX files:
- - conversion to monochrome (without dithering)
- - inverting colors
- - solving problems
-
-
- WHEN TO USE PCXUTILS
- --------------------
- - when Graphics Workshop chokes on a large bitmap
- - when your graphics program insists on storing a monochrome picture as a
- color bitmap (e.g. WP Presentations)
- - when your wordprocessor can't make sense of a PCX file
- - when you want to automate simple conversions (see also tips at end of file)
-
-
- KNOWN PROBLEMS WITH PCX FILES
- -----------------------------
- - WordPerfect sometimes scrambles a monochrome bitmap, especially one
- generated by MS PaintBrush.
- - The emTeX DVI drivers sometimes render Harvard Graphics bitmaps
- as a solid black box.
- - Some versions of Ventura seem to require a round number (in terms of pixels)
- for the image width.
-
-
- SYNTAX
- ------
- PCXUTILS [option] filename
-
- [option] can be:
- /i invert
- /m color to monochrome: every non-white color becomes black;
- Successive /i /m /i transformations would
- map every non-black color to white.
- The current version doesn't offer dithering.
- /r round image size up to even n. of bytes per line
- /p+ standardize palette by interpreting existing palette; equivalent to /p
- /p- standardize palette and ignore existing palette
- Only the first option is honored.
-
-
- NOTES
- -----
- - Irrespective of the option entered, the number of bytes per line is rounded
- up to an even number; this is required by the PCX standard. This has no
- effect on image width.
- - If applicable, the number of bytes per line is reduced to the smallest
- possible number. This should solve problems with e.g. monochrome MS
- Paintbrush files imported into WordPerfect.
- - The /p option should make Harvard Graphics PCX files acceptable to e.g. the
- emTeX DVI-drivers.
- - Color bitmaps may increase in size because data are compressed per line
- per bitplane, although the PCX standard allows compression of all bitplanes
- of one line at one go.
-
- TIPS
- ----
- - If you want to convert a bitmap to monochrome, and you want to map every
- non-black color to white, you can accomplish this by successive /i /m /i
- transformations:
- COPY BITFILE.PCX *.SAV (just in case...)
- PCXUTILS /I BITFILE
- PCXUTILS /M BITFILE
- PCXUTILS /I BITFILE
- - In batch files, you can suppress a request for user input by eg.
- ECHO Y | PCXUTILS /I BITFILE
- - You can also suppress screen output:
- ECHO Y | PCXUTILS /I BITFILE >NUL
-
- This program is donated to the Public Domain.
-
- August 8 1993
-
- Siep Kroonenberg
- Email: N.S.Kroonenberg@eco.rug.nl
-