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830 lines
17 KiB
ObjectPascal
830 lines
17 KiB
ObjectPascal
{
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$Id$
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This file is part of the Free Pascal run time library.
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Copyright (c) 1999-2000 by Florian Klaempfl
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member of the Free Pascal development team
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Video unit for linux
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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**********************************************************************}
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unit Video;
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interface
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{$i videoh.inc}
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implementation
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uses
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Unix, Strings, TermInfo;
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{$i video.inc}
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var
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LastCursorType : byte;
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TtyFd: Longint;
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Console: Boolean;
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OldVideoBuf: PVideoBuf;
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{$ifdef logging}
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f: file;
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const
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logstart: string = '';
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nl: char = #10;
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logend: string = #10#10;
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{$endif logging}
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{$ASMMODE ATT}
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const
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can_delete_term : boolean = false;
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ACSIn : string = '';
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ACSOut : string = '';
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InACS : boolean =false;
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function IsACS(var ch,ACSchar : char): boolean;
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begin
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IsACS:=false;
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case ch of
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#24, #30: { }
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ch:='^';
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#25, #31: { }
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ch:='v';
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#26, #16: {Never introduce a ctrl-Z ... }
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ch:='>';
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{#27,needed in Escape sequences} #17: {}
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ch:='<';
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#176, #177, #178: {°±²}
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begin
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IsACS:=true;
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ACSChar:='a';
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end;
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#180, #181, #182, #185: {´µ¶¹}
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begin
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IsACS:=true;
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ACSChar:='u';
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end;
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#183, #184, #187, #191: {·¸»¿}
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begin
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IsACS:=true;
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ACSChar:='k';
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end;
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#188, #189, #190, #217: {¼½¾Ù}
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begin
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IsACS:=true;
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ACSChar:='j';
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end;
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#192, #200, #211, #212: {ÀÈÓÔ}
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begin
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IsACS:=true;
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ACSChar:='m';
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end;
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#193, #202, #207, #208: {ÁÊÏÐ}
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begin
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IsACS:=true;
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ACSChar:='v';
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end;
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#194, #203, #209, #210: {ÂËÑÒ}
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begin
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IsACS:=true;
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ACSChar:='w';
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end;
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#195, #198, #199, #204: {ÃÆÇÌ}
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begin
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IsACS:=true;
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ACSChar:='t';
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end;
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#196, #205: {ÄÍ}
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begin
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IsACS:=true;
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ACSChar:='q';
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end;
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#179, #186: {³º}
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begin
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IsACS:=true;
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ACSChar:='x';
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end;
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#197, #206, #215, #216: {ÅÎ×Ø}
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begin
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IsACS:=true;
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ACSChar:='n';
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end;
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#201, #213, #214, #218: {ÉÕÖÚ}
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begin
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IsACS:=true;
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ACSChar:='l';
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end;
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#254: { þ }
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begin
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ch:='*';
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end;
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{ Shadows for Buttons }
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#220: { Ü }
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begin
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IsACS:=true;
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ACSChar:='a';
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end;
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#223: { ß }
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begin
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IsACS:=true;
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ACSChar:='a';
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end;
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end;
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end;
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function SendEscapeSeqNdx(Ndx: Word) : boolean;
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var
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P,pdelay: PChar;
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begin
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SendEscapeSeqNdx:=false;
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if not assigned(cur_term_Strings) then
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exit{RunError(219)};
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P:=cur_term_Strings^[Ndx];
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if assigned(p) then
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begin { Do not transmit the delays }
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pdelay:=strpos(p,'$<');
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if assigned(pdelay) then
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pdelay^:=#0;
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fdWrite(TTYFd, P^, StrLen(P));
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SendEscapeSeqNdx:=true;
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if assigned(pdelay) then
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pdelay^:='$';
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end;
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end;
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procedure SendEscapeSeq(const S: String);
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begin
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fdWrite(TTYFd, S[1], Length(S));
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end;
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Function IntStr(l:longint):string;
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var
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s : string;
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begin
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Str(l,s);
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IntStr:=s;
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end;
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Function XY2Ansi(x,y,ox,oy:longint):String;
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{
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Returns a string with the escape sequences to go to X,Y on the screen
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}
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Begin
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if y=oy then
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begin
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if x=ox then
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begin
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XY2Ansi:='';
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exit;
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end;
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if x=1 then
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begin
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XY2Ansi:=#13;
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exit;
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end;
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if x>ox then
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begin
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XY2Ansi:=#27'['+IntStr(x-ox)+'C';
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exit;
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end
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else
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begin
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XY2Ansi:=#27'['+IntStr(ox-x)+'D';
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exit;
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end;
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end;
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if x=ox then
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begin
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if y>oy then
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begin
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XY2Ansi:=#27'['+IntStr(y-oy)+'B';
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exit;
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end
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else
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begin
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XY2Ansi:=#27'['+IntStr(oy-y)+'A';
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exit;
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end;
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end;
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if (x=1) and (oy+1=y) then
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XY2Ansi:=#13#10
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else
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XY2Ansi:=#27'['+IntStr(y)+';'+IntStr(x)+'H';
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End;
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const
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AnsiTbl : string[8]='04261537';
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Function Attr2Ansi(Attr,OAttr:longint):string;
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{
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Convert Attr to an Ansi String, the Optimal code is calculate
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with use of the old OAttr
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}
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var
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hstr : string[16];
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OFg,OBg,Fg,Bg : longint;
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procedure AddSep(ch:char);
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begin
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if length(hstr)>0 then
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hstr:=hstr+';';
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hstr:=hstr+ch;
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end;
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begin
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if Attr=OAttr then
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begin
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Attr2Ansi:='';
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exit;
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end;
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Hstr:='';
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Fg:=Attr and $f;
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Bg:=Attr shr 4;
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OFg:=OAttr and $f;
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OBg:=OAttr shr 4;
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if (OFg<>7) or (Fg=7) or ((OFg>7) and (Fg<8)) or ((OBg>7) and (Bg<8)) then
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begin
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hstr:='0';
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OFg:=7;
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OBg:=0;
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end;
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if (Fg>7) and (OFg<8) then
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begin
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AddSep('1');
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OFg:=OFg or 8;
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end;
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if (Bg and 8)<>(OBg and 8) then
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begin
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AddSep('5');
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OBg:=OBg or 8;
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end;
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if (Fg<>OFg) then
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begin
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AddSep('3');
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hstr:=hstr+AnsiTbl[(Fg and 7)+1];
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end;
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if (Bg<>OBg) then
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begin
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AddSep('4');
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hstr:=hstr+AnsiTbl[(Bg and 7)+1];
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end;
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if hstr='0' then
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hstr:='';
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Attr2Ansi:=#27'['+hstr+'m';
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end;
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procedure TransformUsingACS(var st : string);
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var
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res : string;
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i : longint;
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ch,ACSch : char;
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begin
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res:='';
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for i:=1 to length(st) do
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begin
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ch:=st[i];
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if IsACS(ch,ACSch) then
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begin
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if not InACS then
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begin
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res:=res+ACSIn;
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InACS:=true;
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end;
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res:=res+ACSch;
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end
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else
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begin
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if InACS then
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begin
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res:=res+ACSOut;
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InACS:=false;
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end;
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res:=res+ch;
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end;
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end;
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st:=res;
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end;
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procedure UpdateTTY(Force:boolean);
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type
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tchattr=packed record
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ch : char;
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attr : byte;
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end;
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var
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outbuf : array[0..1023+255] of char;
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chattr : tchattr;
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skipped : boolean;
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outptr,
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spaces,
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eol,
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x,y,
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LastX,LastY,
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SpaceAttr,
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LastAttr : longint;
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p,pold : pvideocell;
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procedure outdata(hstr:string);
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begin
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while (eol>0) do
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begin
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hstr:=#13#10+hstr;
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dec(eol);
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end;
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if NoExtendedFrame and (ACSIn<>'') and (ACSOut<>'') then
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TransformUsingACS(Hstr);
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move(hstr[1],outbuf[outptr],length(hstr));
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inc(outptr,length(hstr));
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if outptr>=1024 then
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begin
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{$ifdef logging}
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blockwrite(f,logstart[1],length(logstart));
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blockwrite(f,nl,1);
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blockwrite(f,outptr,sizeof(outptr));
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blockwrite(f,nl,1);
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blockwrite(f,outbuf,outptr);
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blockwrite(f,nl,1);
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{$endif logging}
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fdWrite(TTYFd,outbuf,outptr);
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outptr:=0;
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end;
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end;
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procedure OutClr(c:byte);
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begin
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if c=LastAttr then
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exit;
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OutData(Attr2Ansi(c,LastAttr));
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LastAttr:=c;
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end;
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procedure OutSpaces;
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begin
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if (Spaces=0) then
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exit;
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OutClr(SpaceAttr);
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OutData(Space(Spaces));
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LastX:=x;
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LastY:=y;
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Spaces:=0;
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end;
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begin
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OutPtr:=0;
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Eol:=0;
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skipped:=true;
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p:=PVideoCell(VideoBuf);
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pold:=PVideoCell(OldVideoBuf);
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{ init Attr and X,Y }
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SendEscapeSeq(#27'[m'{#27'[H'});
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LastAttr:=7;
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LastX:=-1;
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LastY:=-1;
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for y:=1 to ScreenHeight do
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begin
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SpaceAttr:=0;
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Spaces:=0;
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for x:=1 to ScreenWidth do
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begin
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if (not force) and (p^=pold^) then
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begin
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if (Spaces>0) then
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OutSpaces;
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skipped:=true;
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end
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else
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begin
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if skipped then
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begin
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OutData(XY2Ansi(x,y,LastX,LastY));
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LastX:=x;
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LastY:=y;
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skipped:=false;
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end;
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chattr:=tchattr(p^);
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if chattr.ch in [#0,#255] then
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chattr.ch:=' ';
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if chattr.ch=' ' then
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begin
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if Spaces=0 then
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SpaceAttr:=chattr.Attr;
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if (chattr.attr and $f0)=(spaceattr and $f0) then
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chattr.Attr:=SpaceAttr
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else
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begin
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OutSpaces;
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SpaceAttr:=chattr.Attr;
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end;
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inc(Spaces);
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end
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else
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begin
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if (Spaces>0) then
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OutSpaces;
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if ord(chattr.ch)<32 then
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begin
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Chattr.Attr:= $ff xor Chattr.Attr;
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ChAttr.ch:= chr(ord(chattr.ch)+ord('A')-1);
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end;
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if LastAttr<>chattr.Attr then
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OutClr(chattr.Attr);
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OutData(chattr.ch);
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LastX:=x+1;
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LastY:=y;
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end;
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p^:=tvideocell(chattr);
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end;
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inc(p);
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inc(pold);
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end;
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if (Spaces>0) then
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OutSpaces;
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if force then
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inc(eol);
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end;
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eol:=0;
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OutData(XY2Ansi(CursorX,CursorY,LastX,LastY));
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{$ifdef logging}
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blockwrite(f,logstart[1],length(logstart));
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blockwrite(f,nl,1);
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blockwrite(f,outptr,sizeof(outptr));
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blockwrite(f,nl,1);
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blockwrite(f,outbuf,outptr);
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blockwrite(f,nl,1);
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{$endif logging}
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fdWrite(TTYFd,outbuf,outptr);
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if InACS then
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SendEscapeSeqNdx(exit_alt_charset_mode);
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end;
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var
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InitialVideoTio, preInitVideoTio, postInitVideoTio: Unix.termios;
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inputRaw, outputRaw: boolean;
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procedure saveRawSettings(const tio: Unix.termios);
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Begin
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with tio do
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begin
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inputRaw :=
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((c_iflag and (IGNBRK or BRKINT or PARMRK or ISTRIP or
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INLCR or IGNCR or ICRNL or IXON)) = 0) and
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((c_lflag and (ECHO or ECHONL or ICANON or ISIG or IEXTEN)) = 0);
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outPutRaw :=
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((c_oflag and OPOST) = 0) and
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((c_cflag and (CSIZE or PARENB)) = 0) and
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((c_cflag and CS8) <> 0);
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end;
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end;
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procedure restoreRawSettings(tio: Unix.termios);
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begin
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with tio do
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begin
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if inputRaw then
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begin
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c_iflag := c_iflag and (not (IGNBRK or BRKINT or PARMRK or ISTRIP or
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INLCR or IGNCR or ICRNL or IXON));
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c_lflag := c_lflag and
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(not (ECHO or ECHONL or ICANON or ISIG or IEXTEN));
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end;
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if outPutRaw then
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begin
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c_oflag := c_oflag and not(OPOST);
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c_cflag := c_cflag and not(CSIZE or PARENB) or CS8;
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end;
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end;
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TCSetAttr(1,TCSANOW,tio);
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end;
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procedure TargetEntry;
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begin
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TCGetAttr(1,InitialVideoTio);
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end;
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procedure TargetExit;
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begin
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TCSetAttr(1,TCSANOW,InitialVideoTio);
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end;
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procedure prepareInitVideo;
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begin
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TCGetAttr(1,preInitVideoTio);
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saveRawSettings(preInitVideoTio);
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end;
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procedure videoInitDone;
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begin
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TCGetAttr(1,postInitVideoTio);
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restoreRawSettings(postInitVideoTio);
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end;
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procedure prepareDoneVideo;
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var
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tio: Unix.termios;
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begin
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TCGetAttr(1,tio);
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saveRawSettings(tio);
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TCSetAttr(1,TCSANOW,postInitVideoTio);
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end;
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procedure doneVideoDone;
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begin
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restoreRawSettings(preInitVideoTio);
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end;
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procedure InitVideo;
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const
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fontstr : string[3]=#27'(K';
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var
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ThisTTY: String[30];
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FName: String;
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WS: packed record
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ws_row, ws_col, ws_xpixel, ws_ypixel: Word;
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end;
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Err: Longint;
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prev_term : TerminalCommon_ptr1;
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begin
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{$ifndef CPUI386}
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LowAscii:=false;
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{$endif CPUI386}
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if VideoBufSize<>0 then
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begin
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clearscreen;
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if Console then
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SetCursorPos(1,1)
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else
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begin
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if not SendEscapeSeqNdx(cursor_home) then
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SendEscapeSeq(#27'[H');
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end;
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exit;
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end;
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{ check for tty }
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ThisTTY:=TTYName(stdinputhandle);
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if IsATTY(stdinputhandle) then
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begin
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{ save current terminal characteristics and remove rawness }
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prepareInitVideo;
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{ write code to set a correct font }
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fdWrite(stdoutputhandle,fontstr[1],length(fontstr));
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{ running on a tty, find out whether locally or remotely }
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if (Copy(ThisTTY, 1, 8) = '/dev/tty') and
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(ThisTTY[9] >= '0') and (ThisTTY[9] <= '9') then
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begin
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{ running on the console }
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FName:='/dev/vcsa' + ThisTTY[9];
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TTYFd:=fdOpen(FName, Octal(666), Open_RdWr); { open console }
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||
end
|
||
else
|
||
TTYFd:=-1;
|
||
if TTYFd<>-1 then
|
||
Console:=true
|
||
else
|
||
begin
|
||
{ running on a remote terminal, no error with /dev/vcsa }
|
||
Console:=False;
|
||
LowAscii:=false;
|
||
TTYFd:=stdoutputhandle;
|
||
end;
|
||
ioctl(stdinputhandle, TIOCGWINSZ, @WS);
|
||
if WS.ws_Col=0 then
|
||
WS.ws_Col:=80;
|
||
if WS.ws_Row=0 then
|
||
WS.ws_Row:=25;
|
||
ScreenWidth:=WS.ws_Col;
|
||
{ TDrawBuffer only has FVMaxWidth elements
|
||
larger values lead to crashes }
|
||
if ScreenWidth> FVMaxWidth then
|
||
ScreenWidth:=FVMaxWidth;
|
||
ScreenHeight:=WS.ws_Row;
|
||
CursorX:=1;
|
||
CursorY:=1;
|
||
ScreenColor:=True;
|
||
{ allocate pmode memory buffer }
|
||
VideoBufSize:=ScreenWidth*ScreenHeight*2;
|
||
GetMem(VideoBuf,VideoBufSize);
|
||
GetMem(OldVideoBuf,VideoBufSize);
|
||
{ Start with a clear screen }
|
||
if not Console then
|
||
begin
|
||
prev_term:=cur_term;
|
||
setupterm(nil, stdoutputhandle, err);
|
||
can_delete_term:=assigned(prev_term) and (prev_term<>cur_term);
|
||
SendEscapeSeqNdx(cursor_home);
|
||
SendEscapeSeqNdx(cursor_normal);
|
||
SendEscapeSeqNdx(cursor_visible);
|
||
SendEscapeSeqNdx(enter_ca_mode);
|
||
SetCursorType(crUnderLine);
|
||
end
|
||
else if not assigned(cur_term) then
|
||
begin
|
||
setupterm(nil, stdoutputhandle, err);
|
||
can_delete_term:=false;
|
||
end;
|
||
if assigned(cur_term_Strings) then
|
||
begin
|
||
ACSIn:=StrPas(cur_term_Strings^[enter_alt_charset_mode]);
|
||
ACSOut:=StrPas(cur_term_Strings^[exit_alt_charset_mode]);
|
||
if (ACSIn<>'') and (ACSOut<>'') then
|
||
SendEscapeSeqNdx(ena_acs);
|
||
if pos('$<',ACSIn)>0 then
|
||
ACSIn:=Copy(ACSIn,1,Pos('$<',ACSIn)-1);
|
||
if pos('$<',ACSOut)>0 then
|
||
ACSOut:=Copy(ACSOut,1,Pos('$<',ACSOut)-1);
|
||
end
|
||
else
|
||
begin
|
||
ACSIn:='';
|
||
ACSOut:='';
|
||
end;
|
||
ClearScreen;
|
||
{$ifdef logging}
|
||
assign(f,'video.log');
|
||
rewrite(f,1);
|
||
{$endif logging}
|
||
{ save new terminal characteristics and possible restore rawness }
|
||
videoInitDone;
|
||
end
|
||
else
|
||
ErrorCode:=errVioInit; { not a TTY }
|
||
end;
|
||
|
||
procedure DoneVideo;
|
||
begin
|
||
if VideoBufSize=0 then
|
||
exit;
|
||
prepareDoneVideo;
|
||
ClearScreen;
|
||
if Console then
|
||
SetCursorPos(1,1)
|
||
else
|
||
begin
|
||
SendEscapeSeqNdx(exit_ca_mode);
|
||
SendEscapeSeqNdx(cursor_home);
|
||
SendEscapeSeqNdx(cursor_normal);
|
||
SendEscapeSeqNdx(cursor_visible);
|
||
SetCursorType(crUnderLine);
|
||
SendEscapeSeq(#27'[H');
|
||
end;
|
||
FreeMem(VideoBuf,VideoBufSize);
|
||
FreeMem(OldVideoBuf,VideoBufSize);
|
||
VideoBufSize:=0;
|
||
ACSIn:='';
|
||
ACSOut:='';
|
||
doneVideoDone;
|
||
if can_delete_term then
|
||
begin
|
||
del_curterm(cur_term);
|
||
can_delete_term:=false;
|
||
end;
|
||
{$ifdef logging}
|
||
close(f);
|
||
{$endif logging}
|
||
end;
|
||
|
||
|
||
procedure ClearScreen;
|
||
begin
|
||
FillWord(VideoBuf^,VideoBufSize shr 1,$0720);
|
||
if Console then
|
||
UpdateScreen(true)
|
||
else
|
||
begin
|
||
SendEscapeSeq(#27'[0m');
|
||
SendEscapeSeqNdx(clear_screen);
|
||
end;
|
||
end;
|
||
|
||
|
||
procedure UpdateScreen(Force: Boolean);
|
||
var
|
||
DoUpdate : boolean;
|
||
begin
|
||
if LockUpdateScreen<>0 then
|
||
exit;
|
||
if not force then
|
||
begin
|
||
{$ifdef i386}
|
||
asm
|
||
movl VideoBuf,%esi
|
||
movl OldVideoBuf,%edi
|
||
movl VideoBufSize,%ecx
|
||
shrl $2,%ecx
|
||
repe
|
||
cmpsl
|
||
setne DoUpdate
|
||
end;
|
||
{$endif i386}
|
||
end
|
||
else
|
||
DoUpdate:=true;
|
||
if not DoUpdate then
|
||
exit;
|
||
if Console then
|
||
begin
|
||
fdSeek(TTYFd, 4, Seek_Set);
|
||
fdWrite(TTYFd, VideoBuf^,VideoBufSize);
|
||
end
|
||
else
|
||
begin
|
||
UpdateTTY(force);
|
||
end;
|
||
Move(VideoBuf^, OldVideoBuf^, VideoBufSize);
|
||
end;
|
||
|
||
|
||
function GetCapabilities: Word;
|
||
begin
|
||
{ about cpColor... we should check the terminfo database... }
|
||
GetCapabilities:=cpUnderLine + cpBlink + cpColor;
|
||
end;
|
||
|
||
|
||
procedure SetCursorPos(NewCursorX, NewCursorY: Word);
|
||
var
|
||
Pos : array [1..2] of Byte;
|
||
begin
|
||
if Console then
|
||
begin
|
||
fdSeek(TTYFd, 2, Seek_Set);
|
||
Pos[1]:=NewCursorX;
|
||
Pos[2]:=NewCursorY;
|
||
fdWrite(TTYFd, Pos, 2);
|
||
end
|
||
else
|
||
begin
|
||
{ newcursorx,y is 0 based ! }
|
||
SendEscapeSeq(XY2Ansi(NewCursorX+1,NewCursorY+1,0,0));
|
||
end;
|
||
CursorX:=NewCursorX+1;
|
||
CursorY:=NewCursorY+1;
|
||
end;
|
||
|
||
|
||
function GetCursorType: Word;
|
||
begin
|
||
GetCursorType:=LastCursorType;
|
||
end;
|
||
|
||
|
||
procedure SetCursorType(NewType: Word);
|
||
begin
|
||
LastCursorType:=NewType;
|
||
case NewType of
|
||
crBlock :
|
||
Begin
|
||
If not SendEscapeSeqNdx(cursor_visible) then
|
||
SendEscapeSeq(#27'[?17;0;64c');
|
||
End;
|
||
crHidden :
|
||
Begin
|
||
If not SendEscapeSeqNdx(cursor_invisible) then
|
||
SendEscapeSeq(#27'[?1c');
|
||
End;
|
||
else
|
||
begin
|
||
If not SendEscapeSeqNdx(cursor_normal) then
|
||
SendEscapeSeq(#27'[?2c');
|
||
end;
|
||
end;
|
||
end;
|
||
|
||
|
||
function DefaultVideoModeSelector(const VideoMode: TVideoMode; Params: Longint): Boolean;
|
||
begin
|
||
DefaultVideoModeSelector:=false;
|
||
end;
|
||
|
||
|
||
procedure RegisterVideoModes;
|
||
begin
|
||
end;
|
||
|
||
initialization
|
||
RegisterVideoModes;
|
||
|
||
finalization
|
||
UnRegisterVideoModes;
|
||
end.
|
||
{
|
||
$Log$
|
||
Revision 1.2 2001-01-21 20:21:41 marco
|
||
* Rename fest II. Rtl OK
|
||
|
||
Revision 1.1 2001/01/13 11:03:58 peter
|
||
* API 2 RTL commit
|
||
|
||
}
|
||
|