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unit afm;
interface
procedure openafm (var afmin, afmout: text);
procedure closeafm (var afmin, afmout: text);
procedure getafmchar (var C, WX: integer; name: string; var lx, ly, rx, ry: integer);
procedure putafmchar (C, WX: integer; pname: string; lx, ly, rx, ry: integer);
procedure opencc (var ccin: text);
procedure composeCCs;
implementation
uses strtype, data, pathunit;
function makeint (s: string): integer;
var i, c: integer;
begin
val (s, i, c);
makeint := i
end;
function intstr (i: integer): string;
var s: string;
begin
str (i, s);
intstr := s
end;
var line: strec;
procedure readline (var f: text);
(* accept DOS, Unix, and Mac line-ends *)
var s: string;
c: char;
begin
c := ' ';
s := '';
while not eoln (f) and (c <> #$0A) do begin
read (f, c);
if c <> #$0A then s := s + c
end;
if eoln (f) then readln (f);
line.ini (s)
end;
type ligpoi = ^ ligature;
ligature = record
second, ligname: string [30];
nextlig: ligpoi
end;
charmetrics = record
C: integer;
WX: integer;
N: string [30];
lx, ly, rx, ry: integer;
lig: ligpoi;
end;
charmetricspoi = ^ charmetrics;
composespec = record
name, name1, name2: string [30];
x1, y1, x2, y2: integer;
end;
composespecpoi = ^ composespec;
const maxmetricsentry = 600;
maxcomposeentry = 300;
var charentries: array [0..maxmetricsentry] of charmetricspoi;
(* 0..255 are encoded entries, those above are unencoded *)
composeentries: array [1..maxcomposeentry] of composespecpoi;
unencodedindex: integer;
afmopen: Boolean;
entrycount, composecount: integer;
CapHeight, XHeight, Ascender, Descender: Boolean;
afmintermediate: text;
procedure parseCC (line: strec; fromafm: Boolean);
(* parse a line like CC Aacute 2 ; PCC A 0 0 ; PCC acute 183 227 ; *)
var composeentry: composespec;
begin
with composeentry do begin
name := line.nexttoken;
if line.nexttoken <> '2' then begin
if fromafm (* or afmopen ? But then include StartComposites etc. *)
then writeln (afmintermediate, line.str);
end else begin
if fromafm (* or afmopen ? *)
then writeln (afmintermediate, line.str);
(* or re-generate entries? *)
line.gotonexttoken; line.gotonexttoken;
name1 := line.nexttoken;
x1 := makeint (line.nexttoken);
y1 := makeint (line.nexttoken);
line.gotonexttoken; line.gotonexttoken;
name2 := line.nexttoken;
x2 := makeint (line.nexttoken);
y2 := makeint (line.nexttoken);
composecount := composecount + 1;
new (composeentries [composecount]);
composeentries [composecount] ^ := composeentry;
end
end
end;
procedure openafm (var afmin, afmout: text);
var charentry: charmetrics;
newmetric: charmetricspoi;
afmcmd: string;
FontBBoxlx, FontBBoxly, FontBBoxrx, FontBBoxry: integer;
i: integer;
function getligature: ligpoi;
var newlig: ligpoi;
begin
line.gotonexttoken;
if line.nexttoken = 'L' then begin
new (newlig);
newlig ^. second := line.nexttoken;
newlig ^. ligname := line.nexttoken;
newlig ^. nextlig := getligature;
getligature := newlig
end
else getligature := nil
end;
begin
afmopen := true;
rewrite (afmout);
(* set defaults: *)
FontBBoxlx := 0;
FontBBoxly := 0;
FontBBoxrx := 0;
FontBBoxry := 0;
CapHeight := false;
XHeight := false;
Ascender := false;
Descender := false;
for i := 0 to maxmetricsentry do charentries [i] := nil;
unencodedindex := 255;
readline (afmin); afmcmd := line.firsttoken;
while afmcmd <> 'StartCharMetrics' do begin
writeln (afmout, line.str);
if afmcmd = 'FontBBox' then begin
FontBBoxlx := makeint (line.nexttoken);
FontBBoxly := makeint (line.nexttoken);
FontBBoxrx := makeint (line.nexttoken);
FontBBoxry := makeint (line.nexttoken);
end
else if afmcmd = 'CapHeight' then CapHeight := true
else if afmcmd = 'XHeight' then XHeight := true
else if afmcmd = 'Ascender' then Ascender := true
else if afmcmd = 'Descender' then Descender := true
;
readline (afmin); afmcmd := line.firsttoken
end;
readline (afmin);
while line.nexttoken = 'C' do with charentry do begin
C := makeint (line.nexttoken);
line.gotonexttoken; line.gotonexttoken;
WX := makeint (line.nexttoken);
line.gotonexttoken; line.gotonexttoken;
N := line.nexttoken;
if N <> ';' (* name may be missing, e.g. with wfnboss's files *)
then begin
if stdenc then C := getSEcode ('/' + N);
entrycount := entrycount + 1;
line.gotonexttoken;
if line.nexttoken = 'B' then begin
lx := makeint (line.nexttoken);
ly := makeint (line.nexttoken);
rx := makeint (line.nexttoken);
ry := makeint (line.nexttoken);
end else begin
lx := FontBBoxlx;
ly := FontBBoxly;
rx := FontBBoxrx;
ry := FontBBoxry;
end;
lig := getligature;
if C = 0 then C := -1 (* makepfm doesn't like 0 *);
new (newmetric);
newmetric^ := charentry;
if C >= 0 then charentries [C] := newmetric
else begin
unencodedindex := unencodedindex + 1;
charentries [unencodedindex] := newmetric;
end;
end;
readline (afmin);
end;
makefilebuffer (afmintermediate, 'afminter.med');
repeat
writeln (afmintermediate, line.str);
if not eof (afmin) then readline (afmin);
until eof (afmin) or (line.firsttoken = 'CC');
if not eof (afmin) then
while line.firsttoken = 'CC' do begin
parseCC (line, true);
readline (afmin);
end;
end;
procedure opencc (var ccin: text);
var s: string;
ccline: strec;
begin
while not eof (ccin) do begin
readln (ccin, s);
ccline.ini (s);
if ccline.firsttoken = 'CC' then parseCC (ccline, false);
end
end;
procedure closeafm (var afmin, afmout: text);
var c: char;
i: integer;
procedure writelig (lp: ligpoi);
begin
if lp <> nil then begin
write (afmout, ' L ', lp^.second, ' ', lp^.ligname, ' ;');
writelig (lp^.nextlig)
end
end;
begin
if not CapHeight then if charentries [ord ('H')] <> nil then
writeln (afmout, 'CapHeight ', charentries [ord ('H')]^.ry);
if not XHeight then if charentries [ord ('x')] <> nil then
writeln (afmout, 'XHeight ', charentries [ord ('x')]^.ry);
if not Ascender then if charentries [ord ('d')] <> nil then
writeln (afmout, 'Ascender ', charentries [ord ('d')]^.ry);
if not Descender then if charentries [ord ('p')] <> nil then
writeln (afmout, 'Descender ', charentries [ord ('p')]^.ly);
writeln (afmout, 'StartCharMetrics ', entrycount);
for i := 0 to maxmetricsentry do if charentries [i] <> nil then
with charentries [i]^ do begin
write (afmout, 'C ', C, ' ; WX ', WX, ' ; N ', N,
' ; B ', lx, ' ', ly, ' ', rx, ' ', ry, ' ;');
writelig (lig);
if (N = 'f') and (lig = nil) then begin
if getCharString ('/fi') <> nil then write (afmout, ' L i fi ;');
if getCharString ('/fl') <> nil then write (afmout, ' L l fl ;');
end;
writeln (afmout)
end;
getfilebuffer (afmintermediate, afmout);
writeln (afmout, line.str);
while not eof (afmin) do begin
read (afmin, c);
write (afmout, c);
end;
close (afmin);
close (afmout);
end;
function purename (s: string): string;
begin
if pos ('/', s) = 1 then purename := copy (s, 2, length (s) - 1)
else purename := s
end;
procedure composeCCs;
var i: integer;
cc1, cc2: integer;
CS1, CS2: CharStrpointer;
pname, pname1, pname2: string [30];
begin
for i := 1 to composecount do with composeentries [i] ^ do begin
pname := '/' + name;
pname1 := '/' + name1;
pname2 := '/' + name2;
if getCharString (pname) = nil then
if (x1 = 0) and (y1 = 0) then begin
cc1 := getSEcode (pname1);
cc2 := getSEcode (pname2);
CS1 := getCharString (pname1);
CS2 := getCharString (pname2);
if (cc1 >= 0) and (cc2 >= 0)
and (CS1 <> nil) and (CS2 <> nil) then begin
CharStringscount := CharStringscount + 1;
new (CharStrings [CharStringscount], ini);
CharStrings [CharStringscount] ^ . setname (pname);
CharStrings [CharStringscount] ^ . compose
(CS1, CS2, cc1, cc2, x2, y2)
end
end
else writeln ('% cannot compose with first char offset')
end
end;
procedure getafmchar (var C, WX: integer; name: string; var lx, ly, rx, ry: integer);
var i: integer;
N: string;
begin
N := purename (name);
C := -2; (* error indication if not found *)
WX := 0;
lx := 0; ly := 0; rx := 0; ry := 0;
if afmopen then begin
for i := 0 to maxmetricsentry do if charentries [i] <> nil then
if charentries [i]^.N = N then begin
C := charentries [i]^.C;
WX := charentries [i]^.WX;
lx := charentries [i]^.lx;
ly := charentries [i]^.ly;
rx := charentries [i]^.rx;
ry := charentries [i]^.ry;
end
end
end;
procedure putafmchar (C, WX: integer; pname: string; lx, ly, rx, ry: integer);
var index: integer;
name: string [30];
found: Boolean;
begin
name := purename (pname);
if afmopen then begin
if C >= 0 then
if charentries [C] = nil then index := C
else if charentries [C]^.N = name then index := C
else C := -1;
if C < 0 then begin
index := 255; (* last encoded index *)
found := false;
repeat index := index + 1;
if index > unencodedindex then begin
found := true;
unencodedindex := index;
end else if charentries [index] <> nil
then if charentries [index]^.N = name
then found := true
until found
end;
if charentries [index] = nil then begin
entrycount := entrycount + 1;
new (charentries [index]);
charentries [index]^.N := name;
charentries [index]^.lig := nil;
end;
charentries [index]^.C := C;
charentries [index]^.WX := WX;
charentries [index]^.lx := lx;
charentries [index]^.ly := ly;
charentries [index]^.rx := rx;
charentries [index]^.ry := ry;
end
end;
begin
afmopen := false;
ccopen := false;
entrycount := 0;
composecount := 0;
end.
|