(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2010 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; version 2 of the License

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

 *)

{$INCLUDE "options.inc"}

unit uLandPainted;

interface

procedure LoadFromFile(fileName: shortstring);

implementation

type PointRec = packed record

    X, Y: SmallInt;

    flags: byte;

    end;

procedure DrawLineOnLand(X1, Y1, X2, Y2: LongInt);

var  eX, eY, dX, dY: LongInt;

    i, sX, sY, x, y, d: LongInt;

    b: boolean;

    len: LongWord;

begin

    len:= 0;

    if (X1 = X2) and (Y1 = Y2) then

        begin

        exit

        end;

    eX:= 0;

    eY:= 0;

    dX:= X2 - X1;

    dY:= Y2 - Y1;

    if (dX > 0) then sX:= 1

    else

    if (dX < 0) then

        begin

        sX:= -1;

        dX:= -dX

        end else sX:= dX;

    if (dY > 0) then sY:= 1

    else

    if (dY < 0) then

        begin

        sY:= -1;

        dY:= -dY

        end else sY:= dY;

        if (dX > dY) then d:= dX

                    else d:= dY;

        x:= X1;

        y:= Y1;

        for i:= 0 to d do

            begin

            inc(eX, dX);

            inc(eY, dY);

            b:= false;

            if (eX > d) then

                begin

                dec(eX, d);

                inc(x, sX);

                b:= true

                end;

            if (eY > d) then

                begin

                dec(eY, d);

                inc(y, sY);

                b:= true

                end;

            if b then

                begin

                inc(len);

                if (len mod 4) = 0 then FillRoundInLand(X, Y, 34, lfBasic)

                end

        end

end;

procedure LoadFromFile(fileName: shortstring);

var

    f: file of PointRec;

    rec, prevRec: PointRec;

begin

    fileMode:= 0;

    assignFile(f, fileName);

    reset(f);

    while not eof(f) do

        begin

        read(f, rec);

        rec.X:= SDLNet_Read16(@rec.X);

        rec.Y:= SDLNet_Read16(@rec.Y);

        // FIXME: handle single point

        if eof(f) or (rec.flags and $80 <> 0) then

            else

            DrawLineOnLand(prevRec.X, prevRec.Y, rec.X, rec.Y);

        prevRec:= rec;

        end;

    closeFile(f);

end;

end.