ppm2ansi.awk

#!/bin/awk -f
NR==1 { if ($0 != "P3") exit(1); if (!c) c="@"; next }
/^#/  { next }
w==0  { w=$1; h=$2; next }
m==0  { m=$1; r=-1; g=-1; next }
r==-1 { r=$1; next }
g==-1 { g=$1; next }
g!=-1 {
    printf("\x1b[38;2;%d;%d;%dm%s", r, g, $1, c);
    if (++i==w) { printf("\n"); i=0 }
    r=g=-1
}
END { printf("\x1b[0") }