短小精悍的VGA屏幕打印程序

Author: 河南张炯 Date: 1994-03-25

        本程序用TURBO PASCAL 5.5编写在AST 386SX/20，超想汉字系统下运行通过，打印机为EPSON LQ1600K。
        unit lq1600;
        interface
        uses graph,printer;
        const
        esc=#$1B;
        procedure printgraph;
        implementation
        const
        mode=39;  {可修改打印模式为32，33，38，39，40}
        procedure printgraph;
        var
        i,j,kh,m,msb,1sb,maxx,maxy:integer;
        Begin
        maxx:=getmaxx;
        maxy:=getmaxy;
        setviewport(0,0,maxx,maxy,false);
        write(lst,ESC,'A',#$07);
        LSB:=(maxx div 256);
        msb:=(maxx mod 256)+1;
        for j:=0 to maxy div 24 do
        Begin
        write(lst,ESC,'*',char(mode),char(msb),char(lst));
        for i:=0 to maxx do
        Begin
        for h:=0to 2 do
        Begin
        m:=0;
        for k:=0 to 7 do
        Begin
        m:=m shl 1;
        if getpixel(i,j*24+h*8+k) <> 0
        then inc(m);
        end;
        write(1st,char(m));
        end;
        end;
        write(lst,#$0D,#$0A);
        end;
        end;{procedure lq1600}
        end.