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tornado/fw/txt/: tools for text conversion
txt2xbm: convert text to XBM, using ghostscript stretch: resample XBM with rotation correction (x-axis only) xbm2gp: convert XBM to gnuplot, taking into account rotation plot: plot xbm2gp output t: run all the above to display "TEST"
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10
tornado/fw/txt/plot
Executable file
10
tornado/fw/txt/plot
Executable file
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#!/bin/sh
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(
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cat <<EOF
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#set xrange [0:255]
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#set yrange [0:63]
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set size ratio -1
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plot "-" with points pt 7 notitle
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EOF
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cat
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) | gnuplot -persist
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78
tornado/fw/txt/stretch
Executable file
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tornado/fw/txt/stretch
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#!/usr/bin/perl
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$L = 15; # bytes per line
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sub pick
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{
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local ($x, $y) = @_;
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my $i = $x+$y*$X;
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return ((hex $p[$i >> 3]) >> ($i & 7)) & 1;
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}
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$f = 0.001*shift @ARGV;
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while (<>) {
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if (/#define\s+(\S+)_width\s+(\d+)/) {
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print;
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$N = $1;
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$X = $2;
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next;
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}
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if (/#define\s+\S+_height\s+(\d+)/) {
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print;
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$Y = $1;
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next;
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}
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chop;
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next unless /\s*0x/;
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s/^\s*//;
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s/(,|};)$//;
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push(@p, split /,/);
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}
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FIRST: for ($x0 = 0; $x0 != $X; $x0++) {
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for ($y = 0; $y != $Y; $y++) {
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last FIRST if &pick($x0, $y);
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}
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}
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for ($x = $x0; $x != $X; $x++) {
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for ($y = 0; $y != $Y; $y++) {
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$x1 = $x if &pick($x, $y);
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}
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}
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$w = ($x1-$x0)+1;
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$off = int(($X-$x1+$x0)/2);
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#print STDERR "$X $x0 $x1 $w $off\n";
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# x' = x*(1+y*f)
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# x'/(1+y*f) = x
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# x'
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for ($y = 0; $y != $Y; $y++) {
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for ($x = 0; $x != $X; $x += 8) {
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$v = 0;
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for ($i = 0; $i != 8; $i++) {
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$t = $x+$i-$X/2;
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$t = int($t*(1-$y*$f)-$off+$X/2);
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next if $t < 0 || $t >= $X;
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$v |= 1 << $i if &pick($t, $y);
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}
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push(@r, sprintf("0x%02x", $v));
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}
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}
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print "static char ${N}_bits[] = {\n";
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$i = 0;
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for (@r) {
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print " " if !($i % $L);
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print $_;
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last if $i == $#r;
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$i++;
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print ",";
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print "\n" if !($i % $L);
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}
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print "};\n";
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2
tornado/fw/txt/t
Executable file
2
tornado/fw/txt/t
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#!/bin/sh
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./txt2xbm TEST | ./stretch 6 | ./xbm2gp "$@" | ./plot
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9
tornado/fw/txt/txt2xbm
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9
tornado/fw/txt/txt2xbm
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#!/bin/sh
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gs -sDEVICE=pbmraw -sOutputFile=- -g256x64 -q - <<EOF | pbmtoxbm
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/Helvetica-Bold findfont
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80 scalefont
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setfont
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0 4 moveto
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($1) show
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showpage
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EOF
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52
tornado/fw/txt/xbm2gp
Executable file
52
tornado/fw/txt/xbm2gp
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#!/usr/bin/perl
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$I = 50; # inner radius (50 cm)
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$O = 80; # outer radius (80 cm)
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#$Y = 64; # image heights (pixels)
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#$X = 256; # image width (pixels)
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sub ang
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{
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local ($r) = @_;
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# (O-I)/Y = r*arc(a)
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# arc
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return ($O-$I)/$Y/$r;
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}
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if ($ARGV[0] eq "-r") {
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shift @ARGV;
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$rect = 1;
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}
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while (<>) {
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chop;
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if (/#define\s+\S+_width\s+(\d+)/) {
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$X = $1;
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next;
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}
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if (/#define\s+\S+_height\s+(\d+)/) {
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$Y = $1;
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next;
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}
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next unless /\s*0x/;
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s/^\s*//;
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s/(,|};)$//;
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push(@p, split /,/);
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}
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for ($x = 0; $x != $X; $x++) {
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for ($y = 0; $y != $Y; $y++) {
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$i = $x+$y*$X;
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$p = ((hex $p[$i >> 3]) >> ($i & 7)) & 1;
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next unless $p;
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if ($rect) {
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print "$x ", $Y-$y-1, "\n";
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} else {
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$r = ($Y-$y-1)/$Y*($O-$I)+$I;
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$a = &ang($O)*($x-$X/2);
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print $r*sin($a), " ", $r*cos($a), "\n";
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}
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}
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}
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