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|
#!/usr/bin/gawk --exec
#
# -- makes BDF font italic
# version 0.00.1
# programmed by Yasuyuki Furukawa <furukawa@vinelinux.org>
# * public domain *
#
BEGIN {
dy = 3; # level of slant deep (2; Minimam and deepest)
correct = 3; # level of pixel correction
debug = 0;
verbose = 0;
verbose_min = 100;
# The table for pixel correction
# format:
# before <- | -> after
# "height offset pattern... | height offset pattern... "
# if the offset is zero, the pattern starts from last
# slant step immidiately.
# pattern of 'left down to up right'
i = 0;
if (correct >= 3) {
ptable[i++] = "5 -2 ..@ .@ .@ @.. @. 1 -1 .$"; # fixed
ptable[i++] = "5 -4 ... @@@. ..@. .@. @. 2 -2 .$, $, ";
# ptable[i++] = "5 -1 ...@. ...@. ..@. .@. @. 1 3 @$"; # XXX
ptable[i++] = "5 -2 .....@ ....@ ...@. ..@. @@. 1 0 ...@$";
ptable[i++] = "4 -3 ...@ ...@ ..@. @@.. 1 -1 .$@";
ptable[i++] = "4 -3 ..@ ..@ .@. @.. 1 0 @$";
ptable[i++] = "4 -1 .@ .@ @.. @. 2 -1 $, ,$";
ptable[i++] = "4 -2 ..@ ..@@ @@.. .@. 2 -1 .$@ @@$";
ptable[i++] = "4 -2 .@ .@. @.. @. 2 -1 $, ,$";
}
if (correct >= 2) {
ptable[i++] = "3 -2 ....@. ..@@. @@... 1 0 @@$...";
ptable[i++] = "3 -1 ..@ .@ .@. 1 0 .,$";
ptable[i++] = "3 -2 .@ .@ @.@ 1 -1 $@";
ptable[i++] = "3 -2 .@ .@. @.. 1 -1 $.";
ptable[i++] = "3 -2 .@ .@@ @.. 1 -1 $@";
ptable[i++] = "3 -1 ..@ .@. @@. 1 0 .,$";
ptable[i++] = "3 -2 @@. .@. @.. 1 -1 $,";
ptable[i++] = "3 -1 @.@ .@. ... 1 0 .@$";
ptable[i++] = "3 -1 ..@ .@. .@@ 1 0 .,$";
# ptable[i++] = "3 -2 ..@ .@@ @.@ 1 0 @$"; # XXX
}
# pattern of 'left up to down right'
if (correct >= 3) {
ptable[i++] = "6 -2 ..@. ...@. ...@. ...@. ..@. @@. 4 -1 ..$, ...@ ..$, .$,";
ptable[i++] = "4 -1 @.. @.@ .@. .@. 1 1 $@";
ptable[i++] = "4 -3 @. @@@ .@ .@ 1 -1 $.";
ptable[i++] = "4 -3 .. @@. ..@. ..@. 2 -2 @, .$,";
ptable[i++] = "3 -2 @.. .@ .@ 1 -1 $.";
ptable[i++] = "4 -1 .@. .@. ..@. ..@. 1 0 .,$";
ptable[i++] = "4 -1 .@. @@. ..@. ..@. 2 -1 @, @@$"; # XXX
}
if (correct >= 2) {
ptable[i++] = "3 -1 @.. .@@ .. 1 0 .,@"; #
ptable[i++] = "3 -2 @.. @@. .@ 1 -1 $.";
ptable[i++] = "3 -2 @.@ .@ .@ 1 -1 $@";
ptable[i++] = "3 -1 .@. .@. ..@. 1 0 ..$";
# ptable[i++] = "4 -2 @. @. @. .@@ 1 0 $."; # fixed , XXX
ptable[i++] = "4 -1 @. @. .@@ .. 2 0 ,$ .,$";
ptable[i++] = "3 -1 @. @. .@@ 1 0 ,$";
ptable[i++] = "3 -2 .. @@. ..@ 1 -1 @,.";
}
# least pattern
ptable[i++] = "4 -2 ..@ .@ @@@ .. 2 -1 $@ @,@";
ptable[i++] = "3 -1 .@.. @.@. .@@. 1 0 $" # fixed
ptable[i++] = "2 -1 .@ @. 1 -1 $";
init();
}
func init(i, tmp)
{
# local i, tmp;
flag = 0; # reading status
line[0]; # image buffer
if (ARGV[1] == "-h") {
usage();
exit(0);
}
if (ARGV[1] == "-V") {
verbose = 1;
delete ARGV[1];
}
if (ARGV[1] == "-d") {
debug = 1;
delete ARGV[1];
}
if (ARGV[1] == "-D") {
debug = 2;
delete ARGV[1];
}
if (ARGV[1] == "-p") {
print_ptable();
exit(1);
}
vmeter[0] = "|";
vmeter[1] = "\\";
vmeter[2] = "-";
vmeter[3] = "/";
"stty size 2> /dev/null||true" |getline col;
sub(/.* /, "", col);
if (col !~ /^[1-9]/ || col < 30)
col = 0;
}
func usage() {
printf("usage: mkitalic [-V|-d|-p] {input BDF} > {output BDF}\n");
printf(" -V verbose\n");
printf(" -p output pettern table for pixel correction\n");
printf(" -d debug level 1\n");
printf(" -D debug level 2\n");
}
#
# error(str)
#
# Print the error message and exit
# with error state.
#
func error(str) {
printf(str) > "/dev/stderr";
exit(1)
}
#
# rstr(s, n)
#
# Retern a string that repeats
# pettern s(string).
#
func rstr(s, n, i, r) {
# local i, r;
r = "";
for (i = 0; i < n; i++)
r = s r;
return r;
}
#
# subindex(s, t, i)
#
# Serach t(string) in s(string).
#
func subindex(s, t, i, n, r) {
# local n, r;
if (n == 0)
n = length(s);
if (i == 0)
return index(s, t);
r = index(substr(s, i, n), t);
if (r != 0)
return r + i - 1;
else
return 0
}
#
# replace_substr(s, t, i)
#
# Replace a part of s(string)
# to t(string).
#
func replace_substr(s, t, i) {
return substr(s, 1, i-1) t substr(s, i + length(t));
}
#
# correct_pixel(line, width, height)
#
# Correct the pixels to make pettern
# more clear after the slanting.
# Reference the ptable at the BEGIN
# routine.
#
func correct_pixel(line, width, height, x, y, xx, n, nn, d, dd, i, j) {
# local x, y, xx, n, nn, d, dd, i, j;
if (correct == 0)
return;
# add padding pixels from both side
line[height] = rstr(".", width);
for (y = 0; y < height + 1; y ++)
sub(/.*/, ".&.", line[y]);
# pattern matching with ptable
for (y = dy; y < height ; y += dy) {
for (i = 0; ptable[i]; i++) {
split(ptable[i], p, " ");
n = p[2]; d = p[1];
if (y+n < 0 || y+n+d > height + 1)
continue;
for (x = 1; x < width && x > 0; x++) {
x = subindex(line[y+n], p[3], x);
if (x == 0) break;
for (j = 1; j < d; j++) {
xx = subindex(line[y+n+j], p[j+3], x);
if (x != xx) break;
}
if (x == xx) { # matched !
if (debug > 1)
print "$$$$ MATCH with " i " $$$$ (" x ", " y ")";
nn = p[d+4]; dd = p[d+3];
for (j = 0; j < dd; j++)
line[y+nn+j] = replace_substr(line[y+nn+j], p[j+d+5], x);
break;
}
}
}
}
# delete padding pixels from both side
for (y = 0; y < height; y ++) {
sub(/^\./, "", line[y]);
sub(/\.$/, "", line[y]);
}
}
#
# make_slant(line, width, height)
#
# Just slant the pattern of font.
#
func make_slant(line, width, height, y, i, dcount, ncount, tp, ts, te) {
# local y, i, dcount, ncuont, tp, ts, te;
dcount = dx;
ncount = 0;
tp = rstr("#", pad);
for (y = 0; y < height; y++) {
if (y % dy == 0) {
ts = rstr( "#", dcount-- - 1);
te = rstr( "#", ncount++) tp;
}
line[y] = ts substr(line[y], 1, width) te;
}
}
#
# print_ptable()
#
# Visualize ptable.
#
func print_ptable(i, j, n, d, nn,dd, p, pp) {
# local i, j, n, d, nn,dd, p, pp;
printf("\t#### PATTERN TABLE ####\n");
printf("\nFollowing patterns is for pixel correction in slant.\n");
printf("Priority between patterns depends on pattern ID.\n");
for (i = 0; ptable[i]; i++) {
split(ptable[i], p, " ");
n = p[2]; d = p[1];
for (j = 0; j < d; j++)
pp[j] = p[j+3];
nn = p[d+4]; dd = p[d+3];
for (j = 0; j < dd; j++)
p[-n+nn+3+j] = replace_substr(p[-n+nn+3+j], p[j+d+5], 1);
printf("\n\t--- pattern " i " ---\n\n");
for (j = 0; j < d; j++) {
printf(" " pp[j]);
printf(rstr(" ", 7 - length(pp[j])));
if (j == int(d/2))
printf(" ==> ");
else
printf(" ");
if (j +n < dy) printf(" ");
if (j +n < 0) printf(" ");
printf(pp[j]);
printf(rstr(" ", 7 - length(pp[j])));
if (j == int(d/2))
printf(" ==> ");
else
printf(" ");
printf(p[j+3] "\n");
}
}
}
END {
if (verbose != 0 && max_chars > verbose_min)
printf "\r" rstr(" ", col - 3) "\r" > "/dev/stderr";
exit(0);
}
#
# MAIN LOOP
#
# All of the follows is the main
# loop routine.
#
# Change the font property
/^FONT[ \t]/ {
tmp = gsub(/-[R|r]-/, "-I-", $2);
if (tmp == 0)
error("error: the input font is already italic.\n");
}
# Change the font property
/^SLANT[ \t]/ {
sub( /\042[R|r]\042/, "\042I\042", $2);
}
# Get the metric information from the bounding box.
/^BBX[ \t]/ {
height = $3;
width = $2;
dx = int((height + dy - 1)/dy);
if (height > 0 && width > 0) {
$2 = $2 + dx - 1;
$4 = $4 - int((dx -1)/2);
pad = (8 - ($2 % 8)) % 8;
} else
pad = 0;
}
# Get the number of characters.
/^CHARS[ \t]/ {
max_chars = $2;
}
# Change inner state.
/^BITMAP/ {
flag = 1;
count = 0;
print $0;
next;
}
# Modify the every font pattern.
/^ENDCHAR/ {
# correct pixel as pre-processing
correct_pixel(line, width, height);
# make simple slant font
make_slant(line, width, height);
# output font image
for (y = 0; y < height; y ++) {
if (debug == 0) {
gsub(/#/, ".", line[y]);
gsub(/,/, ".", line[y]);
gsub(/\$/, "@", line[y]);
gsub(/[.@][.@][.@][.@]/, "&_", line[y]);
gsub(/\.\.\.\._/,"0", line[y]);
gsub(/\.\.\.@_/, "1", line[y]);
gsub(/\.\.@\._/, "2", line[y]);
gsub(/\.\.@@_/, "3", line[y]);
gsub(/\.@\.\._/, "4", line[y]);
gsub(/\.@\.@_/, "5", line[y]);
gsub(/\.@@\._/, "6", line[y]);
gsub(/\.@@@_/, "7", line[y]);
gsub(/@\.\.\._/, "8", line[y]);
gsub(/@\.\.@_/, "9", line[y]);
gsub(/@\.@\._/, "A", line[y]);
gsub(/@\.@@_/, "B", line[y]);
gsub(/@@\.\._/, "C", line[y]);
gsub(/@@\.@_/, "D", line[y]);
gsub(/@@@\._/, "E", line[y]);
gsub(/@@@@_/, "F", line[y]);
}
print line[y];
}
# Display progress bar in verbose mode
ch_count++
if (verbose != 0 && max_chars > verbose_min) {
n = int(ch_count * 100 / max_chars);
m = int(n * (col - 21) / 100);
l = col - 20 - m;
printf "\rprogress|" rstr("=", m) rstr(" ", l) n "%%" vmeter[ch_count % 4] > "/dev/stderr";
}
flag = 0;
}
# Default
{
if (flag > 0) {
gsub(/0/, "....");
gsub(/1/, "...@");
gsub(/2/, "..@.");
gsub(/3/, "..@@");
gsub(/4/, ".@..");
gsub(/5/, ".@.@");
gsub(/6/, ".@@.");
gsub(/7/, ".@@@");
gsub(/8/, "@...");
gsub(/9/, "@..@");
gsub(/A|a/, "@.@.");
gsub(/B|b/, "@.@@");
gsub(/C|c/, "@@..");
gsub(/D|d/, "@@.@");
gsub(/E|e/, "@@@.");
gsub(/F|f/, "@@@@");
line[count++] = $0;
} else
print $0;
}
|
