/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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; either version 2
 * of the License, or (at your option) any later version.

 * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

/*
 * This code is based on the original source code of Lord Avalot d'Argent version 1.3.
 * Copyright (c) 1994-1995 Mike, Mark and Thomas Thurman.
 */

#include "graph.h"
#include "cadburys.h"

namespace Avalanche {

/*type
 flavourtype = (ch_EGA,ch_BGI);

 chunkblocktype = record
                   flavour:flavourtype;
                   x,y:integer;
                   xl,yl:integer;
                   size:longint;
                   natural:boolean;

                   memorise:boolean; { Hold it in memory? }
                  end;*/

const array<1, 44, char> chunkheader =
    string("Chunk-type AVD file, for an Avvy game.") + '\32' + '\261' + '\x30' + '\x1' + '\x75' + '\261';

/* arraysize = 12000;*/

/* offsets:array[1..30] of longint;*/
byte num_chunks/*,this_chunk*/;
integer gd, gm;
/* f:file;*/
/* aa:array[0..arraysize] of byte;*/

void load() {
	byte a0 /*absolute $A000:800*/;
	byte a1 /*absolute $A400:800*/;
	byte bit;
	untyped_file f;
	assign(f, "chunkbit.avd");
	reset(f, 1);
	seek(f, 177);
	for (bit = 0; bit <= 3; bit ++) {
		port[0x3c4] = 2;
		port[0x3ce] = 4;
		port[0x3c5] = 1 << bit;
		port[0x3cf] = bit;
		blockread(f, a0, 12080);
	}
	close(f);

	assign(f, "place21.avd");
	reset(f, 1);
	seek(f, 177);
	for (bit = 0; bit <= 3; bit ++) {
		port[0x3c4] = 2;
		port[0x3ce] = 4;
		port[0x3c5] = 1 << bit;
		port[0x3cf] = bit;
		blockread(f, a1, 12080);
	}

	close(f);
	bit = getpixel(0, 0);
}

void open_chunk() {
	assign(f, "chunk21.avd");
	rewrite(f, 1);
	blockwrite(f, chunkheader, sizeof(chunkheader));
	blockwrite(f, num_chunks, 1);
	blockwrite(f, offsets, num_chunks * 4);

	this_chunk = 0;
}

void close_chunk() {
	seek(f, 45);
	blockwrite(f, offsets, num_chunks * 4); /* make sure they're right! */
	close(f);
}
/*
procedure mgrab(x1,y1,x2,y2:integer; size:word);
var yy:integer; aapos:word; length,bit:byte;
begin;
 if size>arraysize then
 begin;
  writeln('*** SORRY! *** Increase the arraysize constant to be greater');
  writeln(' than ',size,'.');
  halt;
 end;

 aapos:=0;

 length:=x2-x1;

 for bit:=0 to 3 do
 begin;
  port[$3c4]:=2; port[$3ce]:=4; port[$3C5]:=1 shl bit; port[$3CF]:=bit;
  for yy:=y1 to y2 do
  begin;
   move(mem[$A400*yy*80+x1],aa[aapos],length);
   move(aa[aapos],mem[$A400*yy*80],length);
(*   fillchar(mem[$A400:yy*80+x1],length,#177);*)
   inc(aapos,length);
  end;
 end;
 bit:=getpixel(0,0);

end;
*/
/*procedure grab(x1,y1,x2,y2,realx,realy:integer; flav:flavourtype;
 mem,nat:boolean);
 { yes, I *do* know how to spell "really"! }
var
 s:word;
 p:pointer;
 ch:chunkblocktype;
begin;
 inc(this_chunk);
 offsets[this_chunk]:=filepos(f);


 s:=imagesize(x1,y1,x2,y2);
 getmem(p,s);
 getimage(x1,y1,x2,y2,p^);

 with ch do
 begin;
  flavour:=flav;
  x:=realx; y:=realy;

  xl:=x2-x1;
  yl:=y2-y1;
  size:=s;
  memorise:=mem;
  natural:=nat;
 end;

 setvisualpage(1);
 setactivepage(1);
 readln;
 putimage(ch.x,ch.y,p^,0);

 if flav=ch_EGA then
 begin;
  freemem(p,s);
  s:=4*((x2-x1+7) div 8)*(y2-y1+1);
  with ch do
  begin;
   size:=s;
   x:=x div 8;
   xl:=(xl+7) div 8;
   mgrab(x,y,x+xl,y+yl,s);
  end;
 end;

 readln;
 setvisualpage(0);
 setactivepage(0);

 blockwrite(f,ch,sizeof(ch));

 case flav of
  ch_EGA : if not nat then blockwrite(f,aa,s);
  ch_BGI : begin;
            if not nat then blockwrite(f,p^,s);
            freemem(p,s);
           end;
 end;
{ rectangle(x1,y1,x2,y2);}
end;*/

/*procedure grab(x1,y1,x2,y2,realx,realy:integer; flav:flavourtype;
 mem,nat:boolean);*/
/* yes, I *do* know how to spell "really"! */
/*var
 s:word;
 p:pointer;
 ch:chunkblocktype;
begin;
(* rectangle(x1,y1,x2,y2); exit;*)
 inc(this_chunk);
 offsets[this_chunk]:=filepos(f);


 s:=imagesize(x1,y1,x2,y2);
 getmem(p,s);
 getimage(x1,y1,x2,y2,p^);

 with ch do
 begin;
  flavour:=flav;
  x:=realx; y:=realy;

  xl:=x2-x1;
  yl:=y2-y1;
  size:=s;
  memorise:=mem;
  natural:=nat;
 end;

 setvisualpage(1);
 setactivepage(1);
 readln;
 putimage(ch.x,ch.y,p^,0);

 if flav=ch_EGA then
 begin;
  freemem(p,s);
  s:=4*(((x2 div 8)-(x1 div 8))+2)*(y2-y1+1);
  with ch do
  begin;
   size:=s;
   x:=x div 8;
   xl:=(xl div 8)+2;
   mgrab(x,y,x+xl,y+yl,s);
  end;
 end else
  with ch do { For BGI pictures. *//*
  begin;
   x:=x div 8;
   xl:=(xl+7) div 8;
   size:=imagesize(x*8,y,(x+xl)*8,y+yl);
  end;

 readln;
 setvisualpage(0);
 setactivepage(0);

 blockwrite(f,ch,sizeof(ch));

 case flav of
  ch_EGA : if not nat then blockwrite(f,aa,s);
  ch_BGI : begin;
            if not nat then blockwrite(f,p^,s);
            freemem(p,s);
           end;
 end;
(* rectangle(x1,y1,x2,y2);*)
end;*/

int main(int argc, const char *argv[]) {
	pio_initialize(argc, argv);
	gd = 3;
	gm = 0;
	initgraph(gd, gm, "c:\\bp\\bgi");
	load();
	setwritemode(xorput);

	num_chunks = 7;

	open_chunk();

	grab(98, 10, 181, 41, 247, 82, ch_ega, false, false); /* Drawbridge... */
	grab(223, 10, 320, 41, 233, 82, ch_ega, false, false);
	grab(361, 10, 458, 64, 233, 82, ch_ega, false, false);

	grab(11, 10, 39, 22, 172, 17, ch_bgi, true, true);
	grab(11, 38, 39, 50, 172, 17, ch_ega, true, false); /* Flag. */
	grab(11, 24, 39, 36, 172, 17, ch_ega, true, false);
	grab(11, 10, 39, 22, 172, 17, ch_ega, true, false);
	close_chunk();
	return EXIT_SUCCESS;
}

} // End of namespace Avalanche.