module

CrImage::Format::PPM

Provides methods to read from and write to PPM.

image = File.open("image.ppm") { |file| CrImage::RGBAImage.from_ppm(file) }
File.open("other_image.ppm") { |file| image.to_ppm(file) }

Alternatively, you can use the convenience methods in the Open and Save modules to acheive the same thing:

image = CrImage::RGBAImage.open("image.ppm")
image.save("other_image.ppm")

Instance methods

to_ppm(io : IO) : Nil

Output this image to io using PPM image encoding

Source