(*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2005-2008 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

 *)

unit uLandObjects;

interface

uses SDLh;

{$include options.inc}

procedure AddObjects(InSurface, Surface: PSDL_Surface);

procedure LoadThemeConfig;

procedure BlitImageAndGenerateCollisionInfo(cpX, cpY: Longword; Image, Surface: PSDL_Surface);

implementation

const MaxRects = 256;

      MAXOBJECTRECTS = 16;

      MAXTHEMEOBJECTS = 32;

type PRectArray = ^TRectsArray;

     TRectsArray = array[0..MaxRects] of TSDL_Rect;

     TThemeObject = record

                    Surf: PSDL_Surface;

                    inland: TSDL_Rect;

                    outland: array[0..Pred(MAXOBJECTRECTS)] of TSDL_Rect;

                    rectcnt: Longword;

                    Width, Height: Longword;

                    Maxcnt: Longword;

                    end;

     TThemeObjects = record

                     Count: LongInt;

                     objs: array[0..Pred(MAXTHEMEOBJECTS)] of TThemeObject;

                     end;

     TSprayObject = record

                    Surf: PSDL_Surface;

                    Width, Height: Longword;

                    Maxcnt: Longword;

                    end;

     TSprayObjects = record

                     Count: LongInt;

                     objs: array[0..Pred(MAXTHEMEOBJECTS)] of TSprayObject

                     end;

var Rects: PRectArray;

    RectCount: Longword;

    ThemeObjects: TThemeObjects;

    SprayObjects: TSprayObjects;

procedure BlitImageAndGenerateCollisionInfo(cpX, cpY: Longword; Image, Surface: PSDL_Surface);

var p: PByteArray;

    x, y: Longword;

    bpp: LongInt;

    r: TSDL_Rect;

begin

r.x:= cpX;

r.y:= cpY;

SDL_UpperBlit(Image, nil, Surface, @r);

WriteToConsole('Generating collision info... ');

if SDL_MustLock(Image) then

   SDLTry(SDL_LockSurface(Image) >= 0, true);

bpp:= Image^.format^.BytesPerPixel;

WriteToConsole('('+inttostr(bpp)+') ');

p:= Image^.pixels;

case bpp of

     1: OutError('We don''t work with 8 bit surfaces', true);

     2: for y:= 0 to Pred(Image^.h) do

            begin

            for x:= 0 to Pred(Image^.w) do

                if PWord(@(p^[x * 2]))^ <> 0 then Land[cpY + y, cpX + x]:= COLOR_LAND;

            p:= @(p^[Image^.pitch]);

            end;

     3: for y:= 0 to Pred(Image^.h) do

            begin

            for x:= 0 to Pred(Image^.w) do

                if  (p^[x * 3 + 0] <> 0)

                 or (p^[x * 3 + 1] <> 0)

                 or (p^[x * 3 + 2] <> 0) then Land[cpY + y, cpX + x]:= COLOR_LAND;

            p:= @(p^[Image^.pitch]);

            end;

     4: for y:= 0 to Pred(Image^.h) do

            begin

            for x:= 0 to Pred(Image^.w) do

                if PLongword(@(p^[x * 4]))^ <> 0 then Land[cpY + y, cpX + x]:= COLOR_LAND;

            p:= @(p^[Image^.pitch]);

            end;

     end;

if SDL_MustLock(Image) then

   SDL_UnlockSurface(Image);

WriteLnToConsole(msgOK)

end;

procedure AddRect(x1, y1, w1, h1: LongInt);

begin

with Rects^[RectCount] do

     begin

     x:= x1;

     y:= y1;

     w:= w1;

     h:= h1

     end;

inc(RectCount);

TryDo(RectCount < MaxRects, 'AddRect: overflow', true)

end;

procedure InitRects;

begin

RectCount:= 0;

New(Rects)

end;

procedure FreeRects;

begin

Dispose(rects)

end;

function CheckIntersect(x1, y1, w1, h1: LongInt): boolean;

var i: Longword;

    Result: boolean;

begin

Result:= false;

i:= 0;

if RectCount > 0 then

   repeat

   with Rects^[i] do

        Result:= (x < x1 + w1) and (x1 < x + w) and

                 (y < y1 + h1) and (y1 < y + h);

   inc(i)

   until (i = RectCount) or (Result);

CheckIntersect:= Result

end;

function AddGirder(gX: LongInt; Surface: PSDL_Surface): boolean;

var tmpsurf: PSDL_Surface;

    x1, x2, y, k, i: LongInt;

    r, rr: TSDL_Rect;

    Result: boolean;

    function CountNonZeroz(x, y: LongInt): Longword;

    var i: LongInt;

        Result: Longword;

    begin

    Result:= 0;

    for i:= y to y + 15 do

        if Land[i, x] <> 0 then inc(Result);

    CountNonZeroz:= Result

    end;

begin

y:= 150;

repeat

  inc(y, 24);

  x1:= gX;

  x2:= gX;

  while (x1 > 100) and (CountNonZeroz(x1, y) = 0) do dec(x1, 2);

  i:= x1 - 12;

  repeat

    k:= CountNonZeroz(x1, y);

    dec(x1, 2)

  until (x1 < 100) or (k = 0) or (k = 16) or (x1 < i);

  inc(x1, 2);

  if k = 16 then

     begin

     while (x2 < 1900) and (CountNonZeroz(x2, y) = 0) do inc(x2, 2);

     i:= x2 + 12;

     repeat

       k:= CountNonZeroz(x2, y);

       inc(x2, 2)

     until (x2 > 1900) or (k = 0) or (k = 16) or (x2 > i);

     if (x2 < 1900) and (k = 16) and (x2 - x1 > 250)

        and not CheckIntersect(x1 - 32, y - 64, x2 - x1 + 64, 144) then break;

     end;

x1:= 0;

until y > 900;

if x1 > 0 then

   begin

   Result:= true;

   tmpsurf:= LoadImage(Pathz[ptGraphics] + '/Girder', false, true, true);

   rr.x:= x1;

   rr.y:= y;

   while rr.x + 100 < x2 do

         begin

         SDL_UpperBlit(tmpsurf, nil, Surface, @rr);

         inc(rr.x, 100);

         end;

   r.x:= 0;

   r.y:= 0;

   r.w:= x2 - rr.x;

   r.h:= 16;

   SDL_UpperBlit(tmpsurf, @r, Surface, @rr);

   SDL_FreeSurface(tmpsurf);

   AddRect(x1 - 8, y - 32, x2 - x1 + 16, 80);

   for k:= y to y + 15 do

       for i:= x1 to x2 do Land[k, i]:= $FFFFFF

   end else Result:= false;

AddGirder:= Result

end;

function CheckLand(rect: TSDL_Rect; dX, dY, Color: Longword): boolean;

var i: Longword;

    Result: boolean;

begin

Result:= true;

inc(rect.x, dX);

inc(rect.y, dY);

i:= 0;

{$WARNINGS OFF}

while (i <= rect.w) and Result do

      begin

      Result:= (Land[rect.y, rect.x + i] = Color) and (Land[rect.y + rect.h, rect.x + i] = Color);

      inc(i)

      end;

i:= 0;

while (i <= rect.h) and Result do

      begin

      Result:= (Land[rect.y + i, rect.x] = Color) and (Land[rect.y + i, rect.x + rect.w] = Color);

      inc(i)

      end;

{$WARNINGS ON}

CheckLand:= Result

end;

function CheckCanPlace(x, y: Longword; var Obj: TThemeObject): boolean;

var i: Longword;

    Result: boolean;

begin

with Obj do

     if CheckLand(inland, x, y, $FFFFFF) then

        begin

        Result:= true;

        i:= 1;

        while Result and (i <= rectcnt) do

              begin

              Result:= CheckLand(outland[i], x, y, 0);

              inc(i)

              end;

        if Result then

           Result:= not CheckIntersect(x, y, Width, Height)

        end else

        Result:= false;

CheckCanPlace:= Result

end;

function TryPut(var Obj: TThemeObject; Surface: PSDL_Surface): boolean; overload;

const MaxPointsIndex = 2047;

var x, y: Longword;

    ar: array[0..MaxPointsIndex] of TPoint;

    cnt, i: Longword;

    Result: boolean;

begin

cnt:= 0;

with Obj do

     begin

     if Maxcnt = 0 then

        exit(false);

     x:= 0;

     repeat

         y:= 0;

         repeat

             if CheckCanPlace(x, y, Obj) then

                begin

                ar[cnt].x:= x;

                ar[cnt].y:= y;

                inc(cnt);

                if cnt > MaxPointsIndex then // buffer is full, do not check the rest land

                   begin

                   y:= 5000;

                   x:= 5000;

                   end

                end;

             inc(y, 3);

         until y > 1023 - Height;

         inc(x, getrandom(6) + 3)

     until x > 2047 - Width;

     Result:= cnt <> 0;

     if Result then

        begin

        i:= getrandom(cnt);

        BlitImageAndGenerateCollisionInfo(ar[i].x, ar[i].y, Obj.Surf, Surface);

        AddRect(ar[i].x, ar[i].y, Width, Height);

        dec(Maxcnt)

        end else Maxcnt:= 0

     end;

TryPut:= Result

end;

function TryPut(var Obj: TSprayObject; Surface: PSDL_Surface): boolean; overload;

const MaxPointsIndex = 8095;

var x, y: Longword;

    ar: array[0..MaxPointsIndex] of TPoint;

    cnt, i: Longword;

    r: TSDL_Rect;

    Result: boolean;

begin

cnt:= 0;

with Obj do

     begin

     if Maxcnt = 0 then

        exit(false);

     x:= 0;

     r.x:= 0;

     r.y:= 0;

     r.w:= Width;

     r.h:= Height + 16;

     repeat

         y:= 8;

         repeat

             if CheckLand(r, x, y - 8, $FFFFFF)

                and not CheckIntersect(x, y, Width, Height) then

                begin

                ar[cnt].x:= x;

                ar[cnt].y:= y;

                inc(cnt);

                if cnt > MaxPointsIndex then // buffer is full, do not check the rest land

                   begin

                   y:= 5000;

                   x:= 5000;

                   end

                end;

             inc(y, 12);

         until y > 1023 - Height - 8;

         inc(x, getrandom(12) + 12)

     until x > 2047 - Width;

     Result:= cnt <> 0;

     if Result then

        begin

        i:= getrandom(cnt);

        r.x:= ar[i].X;

        r.y:= ar[i].Y;

        r.w:= Width;

        r.h:= Height;

        SDL_UpperBlit(Obj.Surf, nil, Surface, @r);

        AddRect(ar[i].x - 32, ar[i].y - 32, Width + 64, Height + 64);

        dec(Maxcnt)

        end else Maxcnt:= 0

     end;

TryPut:= Result

end;

procedure ReadThemeInfo(var ThemeObjects: TThemeObjects; var SprayObjects: TSprayObjects);

var s: string;

    f: textfile;

    i, ii: LongInt;

    vobcount: Longword;

    c1, c2: TSDL_Color;

begin

s:= Pathz[ptCurrTheme] + '/' + cThemeCFGFilename;

WriteLnToConsole('Reading objects info...');

Assign(f, s);

{$I-}

Reset(f);

// read sky and explosion border colors

Readln(f, c1.r, c1.g, c1. b);

Readln(f, c2.r, c2.g, c2. b);

glClearColor(c1.r / 255, c1.g / 255, c1.b / 255, 0.99); // sky color

cExplosionBorderColor:= c2.value or $FF000000;

Readln(f, ThemeObjects.Count);

for i:= 0 to Pred(ThemeObjects.Count) do

    begin

    Readln(f, s); // filename

    with ThemeObjects.objs[i] do

         begin

         Surf:= LoadImage(Pathz[ptCurrTheme] + '/' + s, false, true, true);

         Width:= Surf^.w;

         Height:= Surf^.h;

         with inland do Read(f, x, y, w, h);

         Read(f, rectcnt);

         for ii:= 1 to rectcnt do

             with outland[ii] do Read(f, x, y, w, h);

         Maxcnt:= 3;

         ReadLn(f)

         end;

    end;

// sprays

Readln(f, SprayObjects.Count);

for i:= 0 to Pred(SprayObjects.Count) do

    begin

    Readln(f, s); // filename

    with SprayObjects.objs[i] do

         begin

         Surf:= LoadImage(Pathz[ptCurrTheme] + '/' + s, false, true, true);

         Width:= Surf^.w;

         Height:= Surf^.h;

         ReadLn(f, Maxcnt)

         end;

    end;

// snowflakes

Readln(f, vobCount);

if vobCount > 0 then

   Readln(f, vobFramesCount, vobFrameTicks, vobVelocity, vobFallSpeed);

for i:= 0 to Pred(vobCount) do

    AddVisualGear( -cScreenWidth + random(cScreenWidth * 2 + 2048), random(1200) - 100, vgtFlake);

Close(f);

{$I+}

TryDo(IOResult = 0, 'Bad data or cannot access file ' + cThemeCFGFilename, true)

end;

procedure AddThemeObjects(Surface: PSDL_Surface; var ThemeObjects: TThemeObjects; MaxCount: LongInt);

var i, ii, t: LongInt;

    b: boolean;

begin

if ThemeObjects.Count = 0 then exit;

WriteLnToConsole('Adding theme objects...');

i:= 1;

repeat

    t:= getrandom(ThemeObjects.Count);

    ii:= t;

    repeat

      inc(ii);

      if ii = ThemeObjects.Count then ii:= 0;

      b:= TryPut(ThemeObjects.objs[ii], Surface)

    until b or (ii = t);

    inc(i)

until (i > MaxCount) or not b;

end;

procedure AddSprayObjects(Surface: PSDL_Surface; var SprayObjects: TSprayObjects; MaxCount: Longword);

var i: Longword;

    ii, t: LongInt;

    b: boolean;

begin

if SprayObjects.Count = 0 then exit;

WriteLnToConsole('Adding spray objects...');

i:= 1;

repeat

    t:= getrandom(SprayObjects.Count);

    ii:= t;

    repeat

      inc(ii);

      if ii = SprayObjects.Count then ii:= 0;

      b:= TryPut(SprayObjects.objs[ii], Surface)

    until b or (ii = t);

    inc(i)

until (i > MaxCount) or not b;

end;

procedure AddObjects(InSurface, Surface: PSDL_Surface);

begin

InitRects;

AddGirder(256, Surface);

AddGirder(512, Surface);

AddGirder(768, Surface);

AddGirder(1024, Surface);

AddGirder(1280, Surface);

AddGirder(1536, Surface);

AddGirder(1792, Surface);

AddThemeObjects(Surface, ThemeObjects, 8);

AddProgress;

SDL_UpperBlit(InSurface, nil, Surface, nil);

AddSprayObjects(Surface, SprayObjects, 10);

FreeRects

end;

procedure LoadThemeConfig;

begin

ReadThemeInfo(ThemeObjects, SprayObjects)

end;

end.