UNIT LargeTRN;
INTERFACE
PROCEDURE Setup_Large_Trn(filename:string);
FUNCTION LTrn(x,y:byte):byte;
IMPLEMENTATION
USES crt,dos;
TYPE
      transparent_type = ^Transparent_lookup;
      Transparent_lookup = Array[0..250,0..250] of byte;

VAR
     trndata:transparent_type;
     trnsegment:Word;


{******************* LOAD A SMALL TRANSPARENCY *****************************}
PROCEDURE Setup_Large_Trn(filename:string);
VAR
f:file of transparent_lookup;
counter:word;
x,y:word;
BEGIN
new(trndata);
trnsegment:=seg(trndata^);
for counter:=0 to 10000 do mem[seg(trndata^):ofs(trndata^)+counter]:=0;
assign(f,filename);
reset(f);
seek(f,0);
read(f,trndata^);
close(f);


END;

FUNCTION Ltrn(x,y:byte):byte;
BEGIN
Ltrn:=0;
if x>250 then x:=250;
if y>250 then y:=250;
if (x<250) and (y<250) then ltrn:=trndata^[x,y];
if x=y then ltrn:=x;
END;
end.