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PROCEDURE ShowLines;
BEGIN
IF NOT nonupdatemode THEN
BEGIN
IF UseColor THEN
TextColor(Yellow);
GotoXY(40,16); Write('Lines: ',Lines:4,' Level: ',Level);
END;
END;
PROCEDURE ShowGameMode;
BEGIN
IF NOT nonupdatemode THEN
BEGIN
GotoXY(61,13);
IF NrFigures<>7 THEN
write('Extended')
ELSE
write('Standard');
END;
END;
PROCEDURE CreateFrame;
{Used once to print the "background" of the screen (not the background grid,
but the text, and the cadre around the playfield}
VAR I : LONGINT;
BEGIN
SetDefaultColor;
GotoXY(40,4);
Write('FPCTris v0.08, (C) by Marco van de Voort');
GotoXY(40,6);
Write('A demo of the FPC Crt unit, and');
GotoXY(40,7);
Write(' its portability');
FOR I:=9 TO 24 DO
BEGIN
GotoXY(40,I);
Write(' ':38);
END;
ShowGameMode;
IF nonupdatemode THEN
BEGIN
IF HelpMode THEN
BEGIN
GotoXY(40,9);
Write('Arrow left/right to move, down to drop');
GotoXY(40,10);
Write('arrow-up to rotate the piece');
GotoXY(40,11);
Write('"P" to pause');
GotoXY(40,12);
Write('"E" Mode (standard or extended)');
GotoXY(40,13);
Write('"C" switches between color/mono mode');
GotoXY(40,14);
Write('Escape to quit');
GotoXY(40,15);
Write('"S" to show the highscores');
{$IFDEF Unix}
GotoXY(40,16);
Write('"i" try to switch to IBM character set');
{$ENDIF}
END
ELSE
ShowHighScore;
END
ELSE
BEGIN
GotoXY(40,9);
Write('"h" to display the helpscreen');
END;
FOR I :=0 TO TheHeight-1 DO
BEGIN
GotoXY(PosXField-1 ,PosYField+I); Write(Style[2]);
GotoXY(PosXField+2*TheWidth ,PosYField+I); Write(Style[2]);
END;
GotoXY(PosXField-1,PosYField+TheHeight);
Write(Style[3]);
FOR I:=0 TO (2*TheWidth)-1 DO
Write(Style[1]);
Write(Style[4]);
END;
PROCEDURE DisplMainFieldMono;
{Displays the grid with a simple buffering algoritm, depending on
conditional DoubleBuffer}
VAR Row,Column,Difference,StartRow,EndRow : LONGINT;
S : String;
BEGIN
FOR Row:=0 TO TheHeight-1 DO
BEGIN
{$IFDEF DoubleCache}
IF BackField[Row]<>MainField[Row] THEN
BEGIN
{$ENDIF}
FillChar(S[1],2*TheWidth,#32);
StartRow:=0;
EndRow:=TheWidth-1;
{$IFDEF DoubleCache}
Difference:=MainField[Row] XOR BackField[Row]; {Calc differences in line}
{Search for first and last bit changed}
WHILE ((Difference AND AndTable[StartRow])=0) AND (StartRow<(TheWidth-1)) DO
INC(StartRow);
WHILE ((Difference AND AndTable[EndRow])=0) AND (EndRow>0) DO
DEC(EndRow);
{$ENDIF}
{Prepare a string}
GotoXY(PosXField+2*StartRow,PosYField+Row);
S[0]:=CHR(2*(EndRow-StartRow+1));
FOR Column:=0 TO EndRow-StartRow DO
BEGIN
IF (MainField[Row] AND AndTable[StartRow+Column])<>0 THEN
BEGIN
S[Column*2+1]:=Style[5];
S[Column*2+2]:=Style[5];
END;
END;
{Write the string}
Write(S);
{$IFDEF DoubleCache}
END;
{$ENDIF}
END;
{$IFDEF DoubleCache}
BackField:=MainField; {Keep a copy of the screen for faster updates
of terminals, for next DisplMainField.}
{$ENDIF}
END;
PROCEDURE DisplMainFieldColor;
{Same as above, but also use ColorField to output colors,
the buffering is the same, but the colors make it less efficient.}
VAR Row,Column,Difference,StartRow,EndRow,
L : LONGINT;
S : String;
LastCol : LONGINT;
BEGIN
LastCol:=255;
FOR Row:=0 TO TheHeight-1 DO
BEGIN
{$IFDEF DoubleCache}
IF BackField[Row]<>MainField[Row] THEN
BEGIN
{$ENDIF}
FillChar(S[1],2*TheWidth,#32);
StartRow:=0;
EndRow:=TheWidth-1;
{$IFDEF DoubleCache}
Difference:=MainField[Row] XOR BackField[Row]; {Calc differences in line}
WHILE ((Difference AND AndTable[StartRow])=0) AND (StartRow<(TheWidth-1)) DO
INC(StartRow);
WHILE ((Difference AND AndTable[EndRow])=0) AND (EndRow>0) DO
DEC(EndRow);
{$ENDIF}
GotoXY(PosXField+2*StartRow,PosYField+Row);
FOR Column:=0 TO EndRow-StartRow DO
BEGIN
IF (MainField[Row] AND AndTable[StartRow+Column])<>0 THEN
BEGIN
L:=ColorField[Row,StartRow+Column];
IF L=0 THEN
L:=CurrentCol;
IF L<>LastCol THEN
BEGIN
TextColor(L);
Write(Style[5],Style[5]);
END;
END
ELSE
Write(' ');
END;
{$IFDEF DoubleCache}
END;
{$ENDIF}
END;
{$IFDEF DoubleCache}
BackField:=MainField; {Keep a copy of the screen for faster updates
of terminals, for next DisplMainField.}
{$ENDIF}
END;
PROCEDURE DisplMainField;
{Main redraw routine; Check in what mode we are and call appropriate routine}
BEGIN
IF UseColor THEN
DisplMainFieldColor
ELSE
DisplMainFieldMono;
END;
PROCEDURE ShowNextFigure(ThisFig:LONGINT);
VAR I,J,K : LONGINT;
S : String[8];
BEGIN
IF UseColor THEN
TextColor(White);
IF NOT nonupdatemode THEN
BEGIN
FOR I:=0 TO 4 DO
BEGIN
FillChar(S,9,' ');
S[0]:=#8;
K:=Figures[ThisFig][FigureNr];
IF (I+TopY)<=TheHeight THEN
FOR J:=0 TO 4 DO
BEGIN
IF (K AND AndTable[J+5*I])<>0 THEN
BEGIN
S[J*2+1]:=Style[5];
S[J*2+2]:=Style[5];
END
END;
GotoXY(50,11+I); Write(S);
END;
END;
END;
PROCEDURE FixScores;
BEGIN
IF UseColor THEN
SetDefaultColor;
GotoXY(40,18);
Write('Score :',Score);
END;
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