Games of Daze/Infomagic - Games of Daze (Summer 1995) (Disc 1 of 2).iso/x2ftp/msdos/mxcode/ampegsrc/decodsrc/decode.c

Text File | 1994-11-11 | 56.5 KB | 1,817 lines

{ draw image }
     Delay(PauseTime);
{     PutImage(X, Y, Saucer^, XORput);                 { erase image }
     MoveSaucer(X, Y, lrx - ulx + 1, lry - uly + 1);  { width/height }
  until KeyPressed;
  FreeMem(Saucer, size);
  WaitToGo;
end; { PutImagePlay }

procedure PolyPlay;
{ Draw random polygons with random fill styles on the screen }
const
  MaxPts = 5;
type
  PolygonType = array[1..MaxPts] of PointType;
var
  Poly : PolygonType;
  I, Color : word;
begin
  MainWindow('FillPoly demonstration');
  StatusLine('Esc aborts or press a key...');
  repeat
    Color := RandColor;
    SetFillStyle(Random(11)+1, Color);
    SetColor(Color);
    for I := 1 to MaxPts do
      with Poly[I] do
      begin
        X := Random(MaxX);
        Y := Random(MaxY);
      end;
    FillPoly(MaxPts, Poly);
  until KeyPressed;
  WaitToGo;
end; { PolyPlay }

procedure FillStylePlay;
{ Display all of the predefined fill styles available }
var
  Style    : word;
  Width    : word;
  Height   : word;
  X, Y     : word;
  I, J     : word;
  ViewInfo : ViewPortType;

procedure DrawBox(X, Y : word);
begin
  SetFillStyle(Style, MaxColor);
  with ViewInfo do
    Bar(X, Y, X+Width, Y+Height);
  Rectangle(X, Y, X+Width, Y+Height);
  OutTextXY(X+(Width div 2), Y+Height+4, Int2Str(Style));
  Inc(Style);
end; { DrawBox }

begin
  MainWindow('Pre-defined fill styles');
  GetViewSettings(ViewInfo);
  with ViewInfo do
  begin
    Width := 2 * ((x2+1) div 13);
    Height := 2 * ((y2-10) div 10);
  end;
  X := Width div 2;
  Y := Height div 2;
  Style := 0;
  for J := 1 to 3 do
  begin
    for I := 1 to 4 do
    begin
      DrawBox(X, Y);
      Inc(X, (Width div 2) * 3);
    end;
    X := Width div 2;
    Inc(Y, (Height div 2) * 3);
  end;
  SetTextJustify(LeftText, TopText);
  WaitToGo;
end; { FillStylePlay }

procedure FillPatternPlay;
{ Display some user defined fill patterns }
const
  Patterns : array[0..11] of FillPatternType = (
  ($AA, $55, $AA, $55, $AA, $55, $AA, $55 üÖü üÖü !BBäx!!!BBäx!BBäx"""DDêp""DDêp>"""BBääêp""!"BDäêêp>IÉÆ|      ° @≥î>00>><Dêx  
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  @ÇB$$B ""A$$"AII6 üBr»$**IIII**ccregion.  The region is defined as any pixel of
            OldColor which has a path of pixels of OldColor or NewColor
            with sides touching back to the seed point, (XSeed, YSeed).
            Therefore, only pixels of OldColor are modified and no other
            information is changed.

            SEE ALSO

            DRWFILLBOX, DRWFILLCIRCLE, DRWFILLELLIPSE, FILLAREA,
            FILLCONVEXPOLY, FILLPAGE, FILLPOLY, FILLSCREEN, FILLVIEW,
            SETVIEW

            EXAMPL(HNxHHO$B<BBBB<$<BBBB<<BBBB<$BBBBBF:0BBBBF:$BBBF:B<""AAA""AAAAA"<B@@B<" <2\A">>xDDxDNDD<`<>BB=><BBBB<BBBBF:2L\bBBBB&AaQIECA8$>""">0@@A>@@@


 b$(. b$(*
    $    $    $DDDDDDD¬U¬U¬U¬U¬U¬U¬Uw▌w▌w▌w▌w▌w▌w▌°°°⌠ⁿ°°⌠⌠ⁿ⌠⌠ⁿⁿ°°°    ≈  ≈  ≈≈         °                     ≡≡≡≡≡≡≡≡≡≡≡≡≡≡       7HH7"B\DBBRL~BB@@@@@@?R~!!~?DDDD8BBBB|@@Ç>P>III>"AA""AAA"Uw<DDDD86II6"EIQ"\ @@ "AAAAA> >    hH02L2L$$<H(,$<>>>>>>>         VMODE=VIDEOMODEGET
            IF WHICHVGA = 0 THEN STOP
            DUMMY=RES640
            SETVIEW 100, 100, 539, 379
            FILLVIEW 10
            WHILE INKEY$ = ""
            WEND
            VIDEOMODESET VMODE
            END
















                                                                         63






          FONTGETINFO

            PROTOTYPE

            SUB FONTGETINFO (Width%, Height%)

            INPUT

            no input parameters
    WEND
            MOUSEEXIT
            VIDEOMODESET VMODE
            END








































                                                                         86






          MOUSECURSORDEFAULT

            PROTOTYPE

            SUB MOUSECURSORDEFAULT ()

            INPUT

            no input parameters

            OUTPUT

            no value returned

            USAGE

            MOUSECURSORDEFAULT defines the mouse cursor to be a small
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      end;
    end;
  end;
  WaitToGo;
end; { UserLineStylePlay }


procedure SayGoodbye;
{ Say goodbye and then exit the program }
var
  ViewInfo : ViewPortType;
begin
  MainWindow('');
  GetViewSettings(ViewInfo);
  SetTextStyle(TriplexFont, HorizDir, 4);
  SetTextJustify(CenterText, CenterText);
  with ViewInfo do
    OutTextXY((x2-x1) div 2, (y2-y1) div 2, 'That''s all folks!');
  StatusLine('Press any key to quit...');
  repeat until KeyPressed;
end; { SayGoodbye }


PROCEDURE SelectMode;
VAR
    choice1,choice2     : CHAR;
   xsize,ysize            : WORD;
BEGIN
    (* Let's select a mode *)
    ClrScr;
    WriteLn('VESADEMO:');
    WriteLn('1. 256 colors');
    WriteLn('2. 32768 colors');
    WriteLn('3. 65536 colors');
    WriteLn('4. 16777216 colors');
    WriteLn('Q uit');
    WriteLn;
    Write('Your choice: ');
    REPEAT
        ReadLn(choice1);
      IF choice1 <> '1' THEN BEGIN
          WriteLn('Sorry !');
         WriteLn('This demo wasn''t written for more as 256 colors !');
         WriteLn('You would only get a limited impression of the Hi-& TrueColor modes...');
         WriteLn('Switching to 256 colors.');
         choice1 := '1';
      END;
    UNTIL choice1 IN ['1'..'4','q'];
    IF choice1 = 'q' THEN Halt;

    WriteLn;
    WriteLn;
    WriteLn('a. 320x200');
    WriteLn('b. 640x480');
    WriteLn('c. 800x600');
    WriteLn('d. 1024x768');
    WriteLn('e. 1280x1024');
    WriteLn('Q uit');
    WriteLn;
    Write('Your choice: ');
    REPEAT
        ReadLn(choice2);
    UNTIL choice2 IN ['a'..'e','q'];
    IF choice2 = 'q' THEN Halt;

    CASE choice2 OF
        'a' : BEGIN
            xsize := 320;
            ysize := 200;
        END;
        'b' : BEGIN
            xsize := 640;
            ysize := 480;
        END;
        'c' : BEGIN
            xsize := 800;
            ysize := 600;
        END;
        'd' : BEGIN
            xsize := 1024;
            ysize := 768;
        END;
        'e' : BEGIN
            xsize := 1280;
            ysize := 1024;
        END;
    END;
    CASE choice1 OF
        '1' : mode := FindVesaMode(xsize,ysize,8);
        '2' : mode := FindVesaMode(xsize,ysize,15);
        '3' : mode := FindVesaMode(xsize,ysize,16);
        '4' : mode := FindVesaMode(xsize,ysize,24);
    END;
    IF mode = 0 THEN BEGIN
        WriteLn('No such mode could be found !');
        WriteLn('Switching to to 320x200.');
        ReadKey;
        mode := V320x200x256;
    END;
END;

begin { program body }
  SelectMode;
  Initialize;
  ReportStatus;

{  AspectRatioPlay; }
  FillEllipsePlay;
  SectorPlay;
  WriteModePlay;

  ColorPlay;
  { PalettePlay only intended to work on these drivers: }
  if (GraphDriver = EGA) or
      (GraphDriver = EGA64) or
      (GraphDriver = VGA) then
     PalettePlay;
  PutPixelPlay;
{  PutImagePlay; }
  RandBarPlay;
  BarPlay;
  Bar3DPlay;
  ArcPlay;
  CirclePlay;
  PiePlay;
  LineToPlay;
  LineRelPlay;
{  LineStylePlay; }
{  UserLineStylePlay; }
  TextDump;
  TextPlay;
  CrtModePlay;
  FillStylePlay;
  FillPatternPlay;
  PolyPlay;
  SayGoodbye;
{  CloseGraph; }
  CloseVesa;
end.
***************************************************
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    Color := RandColor;
    SetColor(Color);
    SetFillStyle(Random(CloseDotFill)+1, Color);
    Bar3D(Random(MaxWidth), Random(MaxHeight),
          Random(MaxWidth), Random(MaxHeight), 0, TopOff);
  until KeyPressed;
  WaitToGo;
end; { RandBarPlay }

procedure ArcPlay;
{ Draw random arcs on the screen }
var
  MaxRadius : word;
  EndAngle : word;
  ArcInfo : ArcCoordsType;
begin
  MainWindow('Arc / GetArcCoords demonstration');
  StatusLine('Esc aborts or press a key');
  MaxRadius := MaxY div 10;
  repeat
    SetColor(RandColor);
    EndAngle := Random(360);
    SetLineStyle(SolidLn, 0, NormWidth);
    Arc(Random(MaxX), Random(MaxY), Random(EndAngle), EndAngle, Random(MaxRadius));
    GetArcCoords(ArcInfo);
    with ArcInfo do
    begin
      Line(X, Y, XStart, YStart);
      Line(X, Y, Xend, Yend);
    end;
  until KeyPressed;
  WaitToGo;
end; { ArcPlay }

procedure PutPixelPlay;
{ Demonstrate the PutPixel and GetPixel commands }
const
  Seed   = 1962; { A seed for the random number generator }
  NumPts = 2000; { The number of pixels plotted }
  Esc    = #27;
var
  I : word;
  X, Y, Color : word;
  XMax, YMax  : integer;
  ViewInfo    : ViewPortType;
begin
  MainWindow('PutPixel / GetPixel demonstration');
  StatusLine('Esc aborts or press a key...');

  GetViewSettings(ViewInfo);
  with ViewInfo do
  begin
    XMax := (x2-x1-1);
    YMax := (y2-y1-1);
  end;

  while not KeyPressed do
  begin
    { Plot random pixels }
    RandSeed := Seed;
    I := 0;
    while (not KeyPressed) and (I < NumPts) do
    begin
      Inc(I);
        PutPixel(Random(XMax)+1, Random(YMax)+1, RandColor);
    end;

    { Erase pixels }
    RandSeed := Seed;
    I := 0;
    while (not KeyPressed) and (I < NumPts) do
    begin
      Inc(I);
      X := Random(XMax)+1;
      Y := Random(YMax)+1;
      Color := GetPixel(X, Y);
        if Color = RandColor then
          PutPixel(X, Y, 0);
     end;
  end;
  WaitToGo;
end; { PutPixelPlay }

procedure PutImagePlay;
{ Demonstrate the GetImage and PutImage commands }

const
  r  = 20;
  StartX = 100;
  StartY = 50;

var
  CurPort : ViewPortType;

procedure MoveSaucer(var X, Y : integer; Width, Height : integer);
var
  Step : integer;
begin
  Step := Random(2*r);
  if Odd(Step) then
    Step := -Step;
  X := X + Step;
  Step := Random(r);
  if Odd(Step) then
    Step := -Step;
  Y := Y + Step;

  { Make saucer bounce off viewport walls }
  with CurPort do
  begin
    if (x1 + X + Width - 1 > x2) then
      X := x2-x1 - Width + 1
    else
      if (X < 0) then
        X := 0;
    if (y1 + Y + Height - 1 > y2) then
      Y := y2-y1 - Height + 1
    else
      if (Y < 0) then
        Y := 0;
  end;
end; { MoveSaucer }

var
  Pausetime : word;
  Saucer    : pointer;
  X, Y      : integer;
  ulx, uly  : word;
  lrx, lry  : word;
  Size      : word;
  I         : word;
begin
  ClearDevice;
  FullPort;

  { PaintScreen }
  ClearDevice;
  MainWindow('GetImage / PutImage Demonstration');
  StatusLine('Esc aborts or press a key...');
  GetViewSettings(CurPort);

  { DrawSaucer }
  Ellipse(StartX, StartY, 0, 360, r, (r div 3)+2);
  Ellipse(StartX, StartY-4, 190, 357, r, r div 3);
  Line(StartX+7, StartY-6, StartX+10, StartY-12);
  Circle(StartX+10, StartY-12, 2);
  Line(StartX-7, StartY-6, StartX-10, StartY-12);
  Circle(StartX-10, StartY-12, 2);
  SetFillStyle(SolidFill, MaxColor);
  FloodFill(StartX+1, StartY+4, GetColor);

  { ReadSaucerImage }
  ulx := StartX-(r+1);
  uly := StartY-14;
  lrx := StartX+(r+1);
  lry := StartY+(r div 3)+3;

  Size := ImageSize(ulx, uly, lrx, lry);
  GetMem(Saucer, Size);
  GetImage(ulx, uly, lrx, lry, Saucer^);
{  PutImage(ulx, uly, Saucer^, XORput);               { erase image }

  { Plot some "stars" }
  for I := 1 to 1000 do
     PutPixel(Random(MaxX), Random(MaxY), RandColor);
  X := MaxX div 2;
  Y := MaxY div 2;
  PauseTime := 70;

  { Move the saucer around }
  repeat
{     PutImage(X, Y, Saucer^, XORput);                 { draw image }
     Delay(PauseTime);
{     PutImage(X, Y, Saucer^, XORput);                 { erase image }
     MoveSaucer(X, Y, lrx - ulx + 1, lry - uly + 1);  { width/height }
  until KeyPressed;
  FreeMem(Saucer, size);
  WaitToGo;
end; { PutImagePlay }

procedure PolyPlay;
{ Draw random polygons with random fill styles on the screen }
const
  MaxPts = 5;
type
  PolygonType = array[1..MaxPts] of PointType;
var
  Poly : PolygonType;
  I, Color : word;
begin
  MainWindow('FillPoly demonstration');
  StatusLine('Esc aborts or press a key...');
  repeat
    Color := RandColor;
    SetFillStyle(Random(11)+1, Color);
    SetColor(Color);
    for I := 1 to MaxPts do
      with Poly[I] do
      begin
        X := Random(MaxX);
        Y := Random(MaxY);
      end;
    FillPoly(MaxPts, Poly);
  until KeyPressed;
  WaitToGo;
end; { PolyPlay }

procedure FillStylePlay;
{ Display all of the predefined fill styles available }
var
  Style    : word;
  Width    : word;
  Height   : word;
  X, Y     : word;
  I, J     : word;
  ViewInfo : ViewPortType;

procedure DrawBox(X, Y : word);
begin
  SetFillStyle(Style, MaxColor);
  with ViewInfo do
    Bar(X, Y, X+Width, Y+Height);
  Rectangle(X, Y, X+Width, Y+Height);
  OutTextXY(X+(Width div 2), Y+Height+4, Int2Str(Style));
  Inc(Style);
end; { DrawBox }

begin
  MainWindow('Pre-defined fill styles');
  GetViewSettings(ViewInfo);
  with ViewInfo do
  begin
    Width := 2 * ((x2+1) div 13);
    Height := 2 * ((y2-10) div 10);
  end;
  X := Width div 2;
  Y := Height div 2;
  Style := 0;
  for J := 1 to 3 do
  begin
    for I := 1 to 4 do
    begin
      DrawBox(X, Y);
      Inc(X, (Width div 2) * 3);
    end;
    X := Width div 2;
    Inc(Y, (Height div 2) * 3);
  end;
  SetTextJustify(LeftText, TopText);
  WaitToGo;
end; { FillStylePlay }

procedure FillPatternPlay;
{ Display some user defined fill patterns }
const
  Patterns : array[0..11] of FillPatternType = (
  ($AA, $55, $AA, $55, $AA, $55, $AA, $55 üÖü üÖü !BBäx!!!BBäx!BBäx"""DDêp""DDêp>"""BBääêp""!"BDäêêp>IÉÆ|      ° @≥î>00>><Dêx  
!BBäx""DDêp&<"DDêê&22TTêêê$>$< @äêp>          ⁿBBBB<  @@Ç****DDDDDDDU¬U¬U¬U¬U¬U¬U¬▌w▌w▌w▌w▌w▌w▌w°°°≥■°°≥≥■≥≥■■°°°    ≤  ≤  ≤≤         °                     ≡≡≡≡≡≡≡≡≡≡≡≡≡≡       ;DDD;    $"Bdÿ>@@@>||>Ac]AAA1N"A""2,  `1NA"*III*<Bü üB<<BüüüB<A"\"QIE" < <BBBB
  @@  
  ~ ?
  @ÇB$$B ""A$$"AII6 üBr»$**IIII**ccregion.  The region is defined as any pixel of
            OldColor which has a path of pixels of OldColor or NewColor
            with sides touching back to the seed point, (XSeed, YSeed).
            Therefore, only pixels of OldColor are modified and no other
            information is changed.

            SEE ALSO

            DRWFILLBOX, DRWFILLCIRCLE, DRWFILLELLIPSE, FILLAREA,
            FILLCONVEXPOLY, FILLPAGE, FILLPOLY, FILLSCREEN, FILLVIEW,
            SETVIEW

            EXAMPL(HNxHHO$B<BBBB<$<BBBB<<BBBB<$BBBBBF:0BBBBF:$BBBF:B<""AAA""AAAAA"<B@@B<" <2\A">>xDDxDNDD<`<>BB=><BBBB<BBBBF:2L\bBBBB&AaQIECA8$>""">0@@A>@@@


 b$(. b$(*
    $    $    $DDDDDDD¬U¬U¬U¬U¬U¬U¬Uw▌w▌w▌w▌w▌w▌w▌°°°⌠ⁿ°°⌠⌠ⁿ⌠⌠ⁿⁿ°°°    ≈  ≈  ≈≈         °                     ≡≡≡≡≡≡≡≡≡≡≡≡≡≡       7HH7"B\DBBRL~BB@@@@@@?R~!!~?DDDD8BBBB|@@Ç>P>III>"AA""AAA"Uw<DDDD86II6"EIQ"\ @@ "AAAAA> >    hH02L2L$$<H(,$<>>>>>>>         VMODE=VIDEOMODEGET
            IF WHICHVGA = 0 THEN STOP
            DUMMY=RES640
            SETVIEW 100, 100, 539, 379
            FILLVIEW 10
            WHILE INKEY$ = ""
            WEND
            VIDEOMODESET VMODE
            END
















                                                                         63






          FONTGETINFO

            PROTOTYPE

            SUB FONTGETINFO (Width%, Height%)

            INPUT

            no input parameters
    WEND
            MOUSEEXIT
            VIDEOMODESET VMODE
            END








































                                                                         86






          MOUSECURSORDEFAULT

            PROTOTYPE

            SUB MOUSECURSORDEFAULT ()

            INPUT

            no input parameters

            OUTPUT

            no value returned

            USAGE

            MOUSECURSORDEFAULT defines the mouse cursor to be a small
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      end;
    end;
  end;
  WaitToGo;
end; { UserLineStylePlay }


procedure SayGoodbye;
{ Say goodbye and then exit the program }
var
  ViewInfo : ViewPortType;
begin
  MainWindow('');
  GetViewSettings(ViewInfo);
  SetTextStyle(TriplexFont, HorizDir, 4);
  SetTextJustify(CenterText, CenterText);
  with ViewInfo do
    OutTextXY((x2-x1) div 2, (y2-y1) div 2, 'That''s all folks!');
  StatusLine('Press any key to quit...');
  repeat until KeyPressed;
end; { SayGoodbye }


PROCEDURE SelectMode;
VAR
    choice1,choice2     : CHAR;
   xsize,ysize            : WORD;
BEGIN
    (* Let's select a mode *)
    ClrScr;
    WriteLn('VESADEMO:');
    WriteLn('1. 256 colors');
    WriteLn('2. 32768 colors');
    WriteLn('3. 65536 colors');
    WriteLn('4. 16777216 colors');
    WriteLn('Q uit');
    WriteLn;
    Write('Your choice: ');
    REPEAT
        ReadLn(choice1);
      IF choice1 <> '1' THEN BEGIN
          WriteLn('Sorry !');
         WriteLn('This demo wasn''t written for more as 256 colors !');
         WriteLn('You would only get a limited impression of the Hi-& TrueColor modes...');
         WriteLn('Switching to 256 colors.');
         choice1 := '1';
      END;
    UNTIL choice1 IN ['1'..'4','q'];
    IF choice1 = 'q' THEN Halt;

    WriteLn;
    WriteLn;
    WriteLn('a. 320x200');
    WriteLn('b. 640x480');
    WriteLn('c. 800x600');
    WriteLn('d. 1024x768');
    WriteLn('e. 1280x1024');
    WriteLn('Q uit');
    WriteLn;
    Write('Your choice: ');
    REPEAT
        ReadLn(choice2);
    UNTIL choice2 IN ['a'..'e','q'];
    IF choice2 = 'q' THEN Halt;

    CASE choice2 OF
        'a' : BEGIN
            xsize := 320;
            ysize := 200;
        END;
        'b' : BEGIN
            xsize := 640;
            ysize := 480;
        END;
        'c' : BEGIN
            xsize := 800;
            ysize := 600;
        END;
        'd' : BEGIN
            xsize := 1024;
            ysize := 768;
        END;
        'e' : BEGIN
            xsize := 1280;
            ysize := 1024;
        END;
    END;
    CASE choice1 OF
        '1' : mode := FindVesaMode(xsize,ysize,8);
        '2' : mode := FindVesaMode(xsize,ysize,15);
        '3' : mode := FindVesaMode(xsize,ysize,16);
        '4' : mode := FindVesaMode(xsize,ysize,24);
    END;
    IF mode = 0 THEN BEGIN
        WriteLn('No such mode could be found !');
        WriteLn('Switching to to 320x200.');
        ReadKey;
        mode := V320x200x256;
    END;
END;

begin { program body }
  SelectMode;
  Initialize;
  ReportStatus;

{  AspectRatioPlay; }
  FillEllipsePlay;
  SectorPlay;
  WriteModePlay;

  ColorPlay;
  { PalettePlay only intended to work on these drivers: }
  if (GraphDriver = EGA) or
      (GraphDriver = EGA64) or
      (GraphDriver = VGA) then
     PalettePlay;
  PutPixelPlay;
{  PutImagePlay; }
  RandBarPlay;
  BarPlay;
  Bar3DPlay;
  ArcPlay;
  CirclePlay;
  PiePlay;
  LineToPlay;
  LineRelPlay;
{  LineStylePlay; }
{  UserLineStylePlay; }
  TextDump;
  TextPlay;
  CrtModePlay;
  FillStylePlay;
  FillPatternPlay;
  PolyPlay;
  SayGoodbye;
{  CloseGraph; }
  CloseVesa;
end.
***************************************************
    '* SHOW D2ROTATE (ABOUT THE ORIGIN)
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    Color := RandColor;
    SetColor(Color);
    SetFillStyle(Random(CloseDotFill)+1, Color);
    Bar3D(Random(MaxWidth), Random(MaxHeight),
          Random(MaxWidth), Random(MaxHeight), 0, TopOff);
  until KeyPressed;
  WaitToGo;
end; { RandBarPlay }

procedure ArcPlay;
{ Draw random arcs on the screen }
var
  MaxRadius : word;
  EndAngle : word;
  ArcInfo : ArcCoordsType;
begin
  MainWindow('Arc / GetArcCoords demonstration');
  StatusLine('Esc aborts or press a key');
  MaxRadius := MaxY div 10;
  repeat
    SetColor(RandColor);
    EndAngle := Random(360);
    SetLineStyle(SolidLn, 0, NormWidth);
    Arc(Random(MaxX), Random(MaxY), Random(EndAngle), EndAngle, Random(MaxRadius));
    GetArcCoords(ArcInfo);
    with ArcInfo do
    begin
      Line(X, Y, XStart, YStart);
      Line(X, Y, Xend, Yend);
    end;
  until KeyPressed;
  WaitToGo;
end; { ArcPlay }

procedure PutPixelPlay;
{ Demonstrate the PutPixel and GetPixel commands }
const
  Seed   = 1962; { A seed for the random number generator }
  NumPts = 2000; { The number of pixels plotted }
  Esc    = #27;
var
  I : word;
  X, Y, Color : word;
  XMax, YMax  : integer;
  ViewInfo    : ViewPortType;
begin
  MainWindow('PutPixel / GetPixel demonstration');
  StatusLine('Esc aborts or press a key...');

  GetViewSettings(ViewInfo);
  with ViewInfo do
  begin
    XMax := (x2-x1-1);
    YMax := (y2-y1-1);
  end;

  while not KeyPressed do
  begin
    { Plot random pixels }
    RandSeed := Seed;
    I := 0;
    while (not KeyPressed) and (I < NumPts) do
    begin
      Inc(I);
        PutPixel(Random(XMax)+1, Random(YMax)+1, RandColor);
    end;

    { Erase pixels }
    RandSeed := Seed;
    I := 0;
    while (not KeyPressed) and (I < NumPts) do
    begin
      Inc(I);
      X := Random(XMax)+1;
      Y := Random(YMax)+1;
      Color := GetPixel(X, Y);
        if Color = RandColor then
          PutPixel(X, Y, 0);
     end;
  end;
  WaitToGo;
end; { PutPixelPlay }

procedure PutImagePlay;
{ Demonstrate the GetImage and PutImage commands }

const
  r  = 20;
  StartX = 100;
  StartY = 50;

var
  CurPort : ViewPortType;

procedure MoveSaucer(var X, Y : integer; Width, Height : integer);
var
  Step : integer;
begin
  Step := Random(2*r);
  if Odd(Step) then
    Step := -Step;
  X := X + Step;
  Step := Random(r);
  if Odd(Step) then
    Step := -Step;
  Y := Y + Step;

  { Make saucer bounce off viewport walls }
  with CurPort do
  begin
    if (x1 + X + Width - 1 > x2) then
      X := x2-x1 - Width + 1
    else
      if (X < 0) then
        X := 0;
    if (y1 + Y + Height - 1 > y2) then
      Y := y2-y1 - Height + 1
    else
      if (Y < 0) then
        Y := 0;
  end;
end; { MoveSaucer }

var
  Pausetime : word;
  Saucer    : pointer;
  X, Y      : integer;
  ulx, uly  : word;
  lrx, lry  : word;
  Size      : word;
  I         : word;
begin
  ClearDevice;
  FullPort;

  { PaintScreen }
  ClearDevice;
  MainWindow('GetImage / PutImage Demonstration');
  StatusLine('Esc aborts or press a key...');
  GetViewSettings(CurPort);

  { DrawSaucer }
  Ellipse(StartX, StartY, 0, 360, r, (r div 3)+2);
  Ellipse(StartX, StartY-4, 190, 357, r, r div 3);
  Line(StartX+7, StartY-6, StartX+10, StartY-12);
  Circle(StartX+10, StartY-12, 2);
  Line(StartX-7, StartY-6, StartX-10, StartY-12);
  Circle(StartX-10, StartY-12, 2);
  SetFillStyle(SolidFill, MaxColor);
  FloodFill(StartX+1, StartY+4, GetColor);

  { ReadSaucerImage }
  ulx := StartX-(r+1);
  uly := StartY-14;
  lrx := StartX+(r+1);
  lry := StartY+(r div 3)+3;

  Size := ImageSize(ulx, uly, lrx, lry);
  GetMem(Saucer, Size);
  GetImage(ulx, uly, lrx, lry, Saucer^);
{  PutImage(ulx, uly, Saucer^, XORput);               { erase image }

  { Plot some "stars" }
  for I := 1 to 1000 do
     PutPixel(Random(MaxX), Random(MaxY), RandColor);
  X := MaxX div 2;
  Y := MaxY div 2;
  PauseTime := 70;

  { Move the saucer around }
  repeat
{     PutImage(X, Y, Saucer^, XORput);                 { draw image }
     Delay(PauseTime);
{     PutImage(X, Y, Saucer^, XORput);                 { erase image }
     MoveSaucer(X, Y, lrx - ulx + 1, lry - uly + 1);  { width/height }
  until KeyPressed;
  FreeMem(Saucer, size);
  WaitToGo;
end; { PutImagePlay }

procedure PolyPlay;
{ Draw random polygons with random fill styles on the screen }
const
  MaxPts = 5;
type
  PolygonType = array[1..MaxPts] of PointType;
var
  Poly : PolygonType;
  I, Color : word;
begin
  MainWindow('FillPoly demonstration');
  StatusLine('Esc aborts or press a key...');
  repeat
    Color := RandColor;
    SetFillStyle(Random(11)+1, Color);
    SetColor(Color);
    for I := 1 to MaxPts do
      with Poly[I] do
      begin
        X := Random(MaxX);
        Y := Random(MaxY);
      end;
    FillPoly(MaxPts, Poly);
  until KeyPressed;
  WaitToGo;
end; { PolyPlay }

procedure FillStylePlay;
{ Display all of the predefined fill styles available }
var
  Style    : word;
  Width    : word;
  Height   : word;
  X, Y     : word;
  I, J     : word;
  ViewInfo : ViewPortType;

procedure DrawBox(X, Y : word);
begin
  SetFillStyle(Style, MaxColor);
  with ViewInfo do
    Bar(X, Y, X+Width, Y+Height);
  Rectangle(X, Y, X+Width, Y+Height);
  OutTextXY(X+(Width div 2), Y+Height+4, Int2Str(Style));
  Inc(Style);
end; { DrawBox }

begin
  MainWindow('Pre-defined fill styles');
  GetViewSettings(ViewInfo);
  with ViewInfo do
  begin
    Width := 2 * ((x2+1) div 13);
    Height := 2 * ((y2-10) div 10);
  end;
  X := Width div 2;
  Y := Height div 2;
  Style := 0;
  for J := 1 to 3 do
  begin
    for I := 1 to 4 do
    begin
      DrawBox(X, Y);
      Inc(X, (Width div 2) * 3);
    end;
    X := Width div 2;
    Inc(Y, (Height div 2) * 3);
  end;
  SetTextJustify(LeftText, TopText);
  WaitToGo;
end; { FillStylePlay }

procedure FillPatternPlay;
{ Display some user defined fill patterns }
const
  Patterns : array[0..11] of FillPatternType = (
  ($AA, $55, $AA, $55, $AA, $55, $AA, $55 üÖü üÖü !BBäx!!!BBäx!BBäx"""DDêp""DDêp>"""BBääêp""!"BDäêêp>IÉÆ|      ° @≥î>00>><Dêx  
!BBäx""DDêp&<"DDêê&22TTêêê$>$< @äêp>          ⁿBBBB<  @@Ç****DDDDDDDU¬U¬U¬U¬U¬U¬U¬▌w▌w▌w▌w▌w▌w▌w°°°≥■°°≥≥■≥≥■■°°°    ≤  ≤  ≤≤         °                     ≡≡≡≡≡≡≡≡≡≡≡≡≡≡       ;DDD;    $"Bdÿ>@@@>||>Ac]AAA1N"A""2,  `1NA"*III*<Bü üB<<BüüüB<A"\"QIE" < <BBBB
  @@  
  ~ ?
  @ÇB$$B ""A$$"AII6 üBr»$**IIII**ccregion.  The region is defined as any pixel of
            OldColor which has a path of pixels of OldColor or NewColor
            with sides touching back to the seed point, (XSeed, YSeed).
            Therefore, only pixels of OldColor are modified and no other
            information is changed.

            SEE ALSO

            DRWFILLBOX, DRWFILLCIRCLE, DRWFILLELLIPSE, FILLAREA,
            FILLCONVEXPOLY, FILLPAGE, FILLPOLY, FILLSCREEN, FILLVIEW,
            SETVIEW

            EXAMPL(HNxHHO$B<BBBB<$<BBBB<<BBBB<$BBBBBF:0BBBBF:$BBBF:B<""AAA""AAAAA"<B@@B<" <2\A">>xDDxDNDD<`<>BB=><BBBB<BBBBF:2L\bBBBB&AaQIECA8$>""">0@@A>@@@


 b$(. b$(*
    $    $    $DDDDDDD¬U¬U¬U¬U¬U¬U¬Uw▌w▌w▌w▌w▌w▌w▌°°°⌠ⁿ°°⌠⌠ⁿ⌠⌠ⁿⁿ°°°    ≈  ≈  ≈≈         °                     ≡≡≡≡≡≡≡≡≡≡≡≡≡≡       7HH7"B\DBBRL~BB@@@@@@?R~!!~?DDDD8BBBB|@@Ç>P>III>"AA""AAA"Uw<DDDD86II6"EIQ"\ @@ "AAAAA> >    hH02L2L$$<H(,$<>>>>>>>         VMODE=VIDEOMODEGET
            IF WHICHVGA = 0 THEN STOP
            DUMMY=RES640
            SETVIEW 100, 100, 539, 379
            FILLVIEW 10
            WHILE INKEY$ = ""
            WEND
            VIDEOMODESET VMODE
            END
















                                                                         63






          FONTGETINFO

            PROTOTYPE

            SUB FONTGETINFO (Width%, Height%)

            INPUT

            no input parameters
    WEND
            MOUSEEXIT
            VIDEOMODESET VMODE
            END








































                                                                         86






          MOUSECURSORDEFAULT

            PROTOTYPE

            SUB MOUSECURSORDEFAULT ()

            INPUT

            no input parameters

            OUTPUT

            no value returned

            USAGE

            MOUSECURSORDEFAULT defines the mouse cursor to be a small
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      end;
    end;
  end;
  WaitToGo;
end; { UserLineStylePlay }


procedure SayGoodbye;
{ Say goodbye and then exit the program }
var
  ViewInfo : ViewPortType;
begin
  MainWindow('');
  GetViewSettings(ViewInfo);
  SetTextStyle(TriplexFont, HorizDir, 4);
  SetTextJustify(CenterText, CenterText);
  with ViewInfo do
    OutTextXY((x2-x1) div 2, (y2-y1) div 2, 'That''s all folks!');
  StatusLine('Press any key to quit...');
  repeat until KeyPressed;
end; { SayGoodbye }


PROCEDURE SelectMode;
VAR
    choice1,choice2     : CHAR;
   xsize,ysize            : WORD;
BEGIN
    (* Let's select a mode *)
    ClrScr;
    WriteLn('VESADEMO:');
    WriteLn('1. 256 colors');
    WriteLn('2. 32768 colors');
    WriteLn('3. 65536 colors');
    WriteLn('4. 16777216 colors');
    WriteLn('Q uit');
    WriteLn;
    Write('Your choice: ');
    REPEAT
        ReadLn(choice1);
      IF choice1 <> '1' THEN BEGIN
          WriteLn('Sorry !');
         WriteLn('This demo wasn''t written for more as 256 colors !');
         WriteLn('You would only get a limited impression of the Hi-& TrueColor modes...');
         WriteLn('Switching to 256 colors.');
         choice1 := '1';
      END;
    UNTIL choice1 IN ['1'..'4','q'];
    IF choice1 = 'q' THEN Halt;

    WriteLn;
    WriteLn;
    WriteLn('a. 320x200');
    WriteLn('b. 640x480');
    WriteLn('c. 800x600');
    WriteLn('d. 1024x768');
    WriteLn('e. 1280x1024');
    WriteLn('Q uit');
    WriteLn;
    Write('Your choice: ');
    REPEAT
        ReadLn(choice2);
    UNTIL choice2 IN ['a'..'e','q'];
    IF choice2 = 'q' THEN Halt;

    CASE choice2 OF
        'a' : BEGIN
            xsize := 320;
            ysize := 200;
        END;
        'b' : BEGIN
            xsize := 640;
            ysize := 480;
        END;
        'c' : BEGIN
            xsize := 800;
            ysize := 600;
        END;
        'd' : BEGIN
            xsize := 1024;
            ysize := 768;
        END;
        'e' : BEGIN
            xsize := 1280;
            ysize := 1024;
        END;
    END;
    CASE choice1 OF
        '1' : mode := FindVesaMode(xsize,ysize,8);
        '2' : mode := FindVesaMode(xsize,ysize,15);
        '3' : mode := FindVesaMode(xsize,ysize,16);
        '4' : mode := FindVesaMode(xsize,ysize,24);
    END;
    IF mode = 0 THEN BEGIN
        WriteLn('No such mode could be found !');
        WriteLn('Switching to to 320x200.');
        ReadKey;
        mode := V320x200x256;
    END;
END;

begin { program body }
  SelectMode;
  Initialize;
  ReportStatus;

{  AspectRatioPlay; }
  FillEllipsePlay;
  SectorPlay;
  WriteModePlay;

  ColorPlay;
  { PalettePlay only intended to work on these drivers: }
  if (GraphDriver = EGA) or
      (GraphDriver = EGA64) or
      (GraphDriver = VGA) then
     PalettePlay;
  PutPixelPlay;
{  PutImagePlay; }
  RandBarPlay;
  BarPlay;
  Bar3DPlay;
  ArcPlay;
  CirclePlay;
  PiePlay;
  LineToPlay;
  LineRelPlay;
{  LineStylePlay; }
{  UserLineStylePlay; }
  TextDump;
  TextPlay;
  CrtModePlay;
  FillStylePlay;
  FillPatternPlay;
  PolyPlay;
  SayGoodbye;
{  CloseGraph; }
  CloseVesa;
end.
***************************************************
    '* SHOW D2ROTATE (ABOUT THE ORIGIN)
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    Color := RandColor;
    SetColor(Color);
    SetFillStyle(Random(CloseDotFill)+1, Color);
    Bar3D(Random(MaxWidth), Random(MaxHeight),
          Random(MaxWidth), Random(MaxHeight), 0, TopOff);
  until KeyPressed;
  WaitToGo;
end; { RandBarPlay }

procedure ArcPlay;
{ Draw random arcs on the screen }
var
  MaxRadius : word;
  EndAngle : word;
  ArcInfo : ArcCoordsType;
begin
  MainWindow('Arc / GetArcCoords demonstration');
  StatusLine('Esc aborts or press a key');
  MaxRadius := MaxY div 10;
  repeat
    SetColor(RandColor);
    EndAngle := Random(360);
    SetLineStyle(SolidLn, 0, NormWidth);
    Arc(Random(MaxX), Random(MaxY), Random(EndAngle), EndAngle, Random(MaxRadius));
    GetArcCoords(ArcInfo);
    with ArcInfo do
    begin
      Line(X, Y, XStart, YStart);
      Line(X, Y, Xend, Yend);
    end;
  until KeyPressed;
  WaitToGo;
end; { ArcPlay }

procedure PutPixelPlay;
{ Demonstrate the PutPixel and GetPixel commands }
const
  Seed   = 1962; { A seed for the random number generator }
  NumPts = 2000; { The number of pixels plotted }
  Esc    = #27;
var
  I : word;
  X, Y, Color : word;
  XMax, YMax  : integer;
  ViewInfo    : ViewPortType;
begin
  MainWindow('PutPixel / GetPixel demonstration');
  StatusLine('Esc aborts or press a key...');

  GetViewSettings(ViewInfo);
  with ViewInfo do
  begin
    XMax := (x2-x1-1);
    YMax := (y2-y1-1);
  end;

  while not KeyPressed do
  begin
    { Plot random pixels }
    RandSeed := Seed;
    I := 0;
    while (not KeyPressed) and (I < NumPts) do
    begin
      Inc(I);
        PutPixel(Random(XMax)+1, Random(YMax)+1, RandColor);
    end;

    { Erase pixels }
    RandSeed := Seed;
    I := 0;
    while (not KeyPressed) and (I < NumPts) do
    begin
      Inc(I);
      X := Random(XMax)+1;
      Y := Random(YMax)+1;
      Color := GetPixel(X, Y);
        if Color = RandColor then
          PutPixel(X, Y, 0);
     end;
  end;
  WaitToGo;
end; { PutPixelPlay }

procedure PutImagePlay;
{ Demonstrate the GetImage and PutImage commands }

const
  r  = 20;
  StartX = 100;
  StartY = 50;

var
  CurPort : ViewPortType;

procedure MoveSaucer(var X, Y : integer; Width, Height : integer);
var
  Step : integer;
begin
  Step := Random(2*r);
  if Odd(Step) then
    Step := -Step;
  X := X + Step;
  Step := Random(r);
  if Odd(Step) then
    Step := -Step;
  Y := Y + Step;

  { Make saucer bounce off viewport walls }
  with CurPort do
  begin
    if (x1 + X + Width - 1 > x2) then
      X := x2-x1 - Width + 1
    else
      if (X < 0) then
        X := 0;
    if (y1 + Y + Height - 1 > y2) then
      Y := y2-y1 - Height + 1
    else
      if (Y < 0) then
        Y := 0;
  end;
end; { MoveSaucer }

var
  Pausetime : word;
  Saucer    : pointer;
  X, Y      : integer;
  ulx, uly  : word;
  lrx, lry  : word;
  Size      : word;
  I         : word;
begin
  ClearDevice;
  FullPort;

  { PaintScreen }
  ClearDevice;
  MainWindow('GetImage / PutImage Demonstration');
  StatusLine('Esc aborts or press a key...');
  GetViewSettings(CurPort);

  { DrawSaucer }
  Ellipse(StartX, StartY, 0, 360, r, (r div 3)+2);
  Ellipse(StartX, StartY-4, 190, 357, r, r div 3);
  Line(StartX+7, StartY-6, StartX+10, StartY-12);
  Circle(StartX+10, StartY-12, 2);
  Line(StartX-7, StartY-6, StartX-10, StartY-12);
  Circle(StartX-10, StartY-12, 2);
  SetFillStyle(SolidFill, MaxColor);
  FloodFill(StartX+1, StartY+4, GetColor);

  { ReadSaucerImage }
  ulx := StartX-(r+1);
  uly := StartY-14;
  lrx := StartX+(r+1);
  lry := StartY+(r div 3)+3;

  Size := ImageSize(ulx, uly, lrx, lry);
  GetMem(Saucer, Size);
  GetImage(ulx, uly, lrx, lry, Saucer^);
{  PutImage(ulx, uly, Saucer^, XORput);               { erase image }

  { Plot some "stars" }
  for I := 1 to 1000 do
     PutPixel(Random(MaxX), Random(MaxY), RandColor);
  X := MaxX div 2;
  Y := MaxY div 2;
  PauseTime := 70;

  { Move the saucer around }
  repeat
{     PutImage(X, Y, Saucer^, XORput);                 { draw image }
     Delay(PauseTime);
{     PutImage(X, Y, Saucer^, XORput);                 { erase image }
     MoveSaucer(X, Y, lrx - ulx + 1, lry - uly + 1);  { width/height }
  until KeyPressed;
  FreeMem(Saucer, size);
  WaitToGo;
end; { PutImagePlay }

procedure PolyPlay;
{ Draw random polygons with random fill styles on the screen }
const
  MaxPts = 5;
type
  PolygonType = array[1..MaxPts] of PointType;
var
  Poly : PolygonType;
  I, Color : word;
begin
  MainWindow('FillPoly demonstration');
  StatusLine('Esc aborts or press a key...');
  repeat
    Color := RandColor;
    SetFillStyle(Random(11)+1, Color);
    SetColor(Color);
    for I := 1 to MaxPts do
      with Poly[I] do
      begin
        X := Random(MaxX);
        Y := Random(MaxY);
      end;
    FillPoly(MaxPts, Poly);
  until KeyPressed;
  WaitToGo;
end; { PolyPlay }

procedure FillStylePlay;
{ Display all of the predefined fill styles available }
var
  Style    : word;
  Width    : word;
  Height   : word;
  X, Y     : word;
  I, J     : word;
  ViewInfo : ViewPortType;

procedure DrawBox(X, Y : word);
begin
  SetFillStyle(Style, MaxColor);
  with ViewInfo do
    Bar(X, Y, X+Width, Y+Height);
  Rectangle(X, Y, X+Width, Y+Height);
  OutTextXY(X+(Width div 2), Y+Height+4, Int2Str(Style));
  Inc(Style);
end; { DrawBox }

begin
  MainWindow('Pre-defined fill styles');
  GetViewSettings(ViewInfo);
  with ViewInfo do
  begin
    Width := 2 * ((x2+1) div 13);
    Height := 2 * ((y2-10) div 10);
  end;
  X := Width div 2;
  Y := Height div 2;
  Style := 0;
  for J := 1 to 3 do
  begin
    for I := 1 to 4 do
    begin
      DrawBox(X, Y);
      Inc(X, (Width div 2) * 3);
    end;
    X := Width div 2;
    Inc(Y, (Height div 2) * 3);
  end;
  SetTextJustify(LeftText, TopText);
  WaitToGo;
end; { FillStylePlay }

procedure FillPatternPlay;
{ Display some user defined fill patterns }
const
  Patterns : array[0..11] of FillPatternType = (
  ($AA, $55, $AA, $55, $AA, $55, $AA, $55 üÖü üÖü !BBäx!!!BBäx!BBäx"""DDêp""DDêp>"""BBääêp""!"BDäêêp>IÉÆ|      ° @≥î>00>><Dêx  
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            OldColor which has a path of pixels of OldColor or NewColor
            with sides touching back to the seed point, (XSeed, YSeed).
            Therefore, only pixels of OldColor are modified and no other
            information is changed.

            SEE ALSO

            DRWFILLBOX, DRWFILLCIRCLE, DRWFILLELLIPSE, FILLAREA,
            FILLCONVEXPOLY, FILLPAGE, FILLPOLY, FILLSCREEN, FILLVIEW,
            SETVIEW

            EXAMPL(HNxHHO$B<BBBB<$<BBBB<<BBBB<$BBBBBF:0BBBBF:$BBBF:B<""AAA""AAAAA"<B@@B<" <2\A">>xDDxDNDD<`<>BB=><BBBB<BBBBF:2L\bBBBB&AaQIECA8$>""">0@@A>@@@


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    $    $    $DDDDDDD¬U¬U¬U¬U¬U¬U¬Uw▌w▌w▌w▌w▌w▌w▌°°°⌠ⁿ°°⌠⌠ⁿ⌠⌠ⁿⁿ°°°    ≈  ≈  ≈≈         °                     ≡≡≡≡≡≡≡≡≡≡≡≡≡≡       7HH7"B\DBBRL~BB@@@@@@?R~!!~?DDDD8BBBB|@@Ç>P>III>"AA""AAA"Uw<DDDD86II6"EIQ"\ @@ "AAAAA> >    hH02L2L$$<H(,$<>>>>>>>         VMODE=VIDEOMODEGET
            IF WHICHVGA = 0 THEN STOP
            DUMMY=RES640
            SETVIEW 100, 100, 539, 379
            FILLVIEW 10
            WHILE INKEY$ = ""
            WEND
            VIDEOMODESET VMODE
            END
















                                                                         63






          FONTGETINFO

            PROTOTYPE

            SUB FONTGETINFO (Width%, Height%)

            INPUT

            no input parameters
    WEND
            MOUSEEXIT
            VIDEOMODESET VMODE
            END








































                                                                         86






          MOUSECURSORDEFAULT

            PROTOTYPE

            SUB MOUSECURSORDEFAULT ()

            INPUT

            no input parameters

            OUTPUT

            no value returned

            USAGE

            MOUSECURSORDEFAULT defines the mouse cursor to be a small
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    end;
  end;
  WaitToGo;
end; { UserLineStylePlay }


procedure SayGoodbye;
{ Say goodbye and then exit the program }
var
  ViewInfo : ViewPortType;
begin
  MainWindow('');
  GetViewSettings(ViewInfo);
  SetTextStyle(TriplexFont, HorizDir, 4);
  SetTextJustify(CenterText, CenterText);
  with ViewInfo do
    OutTextXY((x2-x1) div 2, (y2-y1) div 2, 'That''s all folks!');
  StatusLine('Press any key to quit...');
  repeat u