ppmtolss16 — Convert a PPM to an LSS16 image

       This manual page was compiled by dann frazier <dannf@debian.org> for the DebianGNU/Linux system (but may
       be used by others).  Most of the content was written by H. Peter Anvin.

                                                                                                   PPMTOLSS16(1)

       This program cannot handle comments in the header, nor "plain" ppm format.

       This manual page documents briefly the ppmtolss16 command.

       The ppmtolss16 program converts a "raw" PPM file with max 16 colors to a simple RLE-based format:

       simpleRLE-basedformat
       unint32 0x1413f3d   magic (littleendian)
       unint16 xsize       littleendian
       unint15 ysize       littleendian
       16 x unint8 r,g,b   color map

       Color map is in 6-bit format (each byte is 0..63)

       Then, a sequence of nybbles:

       N   ... if N is != previous pixel, one pixel of color N, otherwise run sequence follows ...

       M    ... if M > 0 then run length is M+1, otherwise run sequence is encoded in two nybbles, littleendian,
       +17

       The nybble sequences are on a per-row basis, runs may not extend across  rows  and  odd-nybble  rows  are
       zero-padded.

       At the start of a row, the "previous pixel" is assumed to be zero.

       ppmtolss16 — Convert a PPM to an LSS16 image

       A summary of options is included below.

       #rrggbb=i Specify that the color #rrggbb (hex) should be assigned index i (decimal).

ppmtolss16(1)

ppmtolss16 [               #rrggbb=i...][<input.ppm][>output.rle]