Convert a TrueVision Targa file to a Netpbm image. More information: https://netpbm.sourceforge.net/doc/tgatoppm.html.
tgatoppm path/to/file.tga > path/to/output.ppm
stdout
:tgatoppm --headerdump path/to/file.tga > path/to/output.ppm
tgatoppm --alphaout path/to/transparency_file.pgm path/to/file.tga > path/to/output.ppm
tgatoppm -version