tldr/pages/common/pgmramp.md

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# pgmramp
> Generate a greyscale map.
> More information: <https://netpbm.sourceforge.net/doc/pgmramp.html>.
- Generate a left-to-right greyscale map:
`pgmtexture -lr > {{path/to/output.pgm}}`
- Generate a top-to-bottom greyscale map:
`pgmtexture -tb > {{path/to/output.pgm}}`
- Generate a rectangular greyscale map:
`pgmtexture -rectangle > {{path/to/output.pgm}}`
- Generate a elliptical greyscale map:
`pgmtexture -ellipse {{path/to/image.pgm}} > {{path/to/output.pgm}}`
- Generate a greyscale map from the top-left corner to the bottom-right corner:
`pgmtexture -diagonal {{path/to/image.pgm}} > {{path/to/output.pgm}}`