PPMRAINBOW(1)

🌈 PPMRAINBOW(1) — the Ppmrainbow User Manual, bestie edition 🌈

okay so. you want a rainbow? like, an actual file that is a rainbow? periodt, this is the tool. it lives in the General Commands Manual section and it's one of the Netpbm girlies. let's get into it 💅

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✨ NAME ✨

ppmrainbow — Generate a rainbow 🦋

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🌸 SYNOPSIS 🌸

ppmrainbow

[-width=number] [-height=number] [-tmpdir=directory] [-norepeat]
[-verbose] color ...

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💖 DESCRIPTION 💖

This program is part of Netpbm(1).

ppmrainbow generates a PPM image that fades from one color to another to another, from left to right, like a rainbow. yes literally it's giving rainbow. 🌈 no cap.

If you want a vertical rainbow, or some other non-horizontal rainbow, just run the output through pnmrotate or pamflip. slay, custom orientation.

One use for such a rainbow is to compose it with another image under a transparency mask, so you can add a rainbow area to another image. 🎀 and in fact, you can make rainbow-colored text by using pbmtext, pamcomp, and ppmrainbow together. iconic combo honestly.

pgmramp does a similar thing for grayscale images. (so if you're feeling monochrome today, that's your girl.)

If you just want an image containing all the possible colors (for some kind of processing; not to look at), see pamseq. like, that one's for the math girlies, not the aesthetics girlies. 💀

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🎀 ARGUMENTS 🎀

color ... is the list of colors, in order from left to right, to go into the rainbow. 🫶

The first color is added again on the right end of the image unless you specify the -norepeat option. This means you can concatenate multiple copies (tile, as with pnmtile) to make a continuous larger image. that's the trick, iykyk ✨

color is as described for the argument of the pnm_parsecolor() library routine.

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💅 OPTIONS 💅

All options can be abbreviated to their shortest unique prefix. You may use two hyphens instead of one to designate an option. You may use either white space or equals signs between an option name and its value. (flexible queen behavior 👑)

• -width number — The width in pixels of the output image. Default is 600.
• -height number — The height in pixels of the output image. Default is 8.
• -norepeat — This option makes ppmrainbow end the rainbow with the last color you specify. Without this option, ppmrainbow adds the first color you specify to the right end of the rainbow as if you had repeated it. so basically: do you want the loop or not, bestie 😭
• -tmpdir — The directory specification of the directory ppmrainbow is to use for temporary files.

Default is the value of the TMPDIR environment variable, or /tmp if TMPDIR is not set.

ppmrainbow always creates a directory within this directory and creates all its files within that directory. (she likes her own little folder, respect it 🌸)

• -verbose — Print the "commands" (invocations of other Netpbm programs) that ppmrainbow uses to create the image. very "show me your work" of her ngl 🙈

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🔥 SEE ALSO 🔥

pgmramp(1), pamseq(1), pamgradient(1), ppmmake(1), ppmfade(1), ppm(1).

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⭐ AUTHOR ⭐

Arjen Bax wrote ppmrainbow in June 2001 and contributed it to the Netpbm package. Bryan Henderson wrote this manual in July 2001. absolute legends, we stan 🫶

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💜 DOCUMENT SOURCE 💜

This manual page was generated by the Netpbm tool makeman from HTML source. The master documentation is at

http://netpbm.sourceforge.net/doc/ppmrainbow.html

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and that's the whole vibe check, bestie 💖 this was the netpbm documentation, version dated 12 November 2014 — go make something rainbow, you got this 🌈✨🎀