/* 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.
 */

#define __cadburys_implementation__


#include "cadburys.h"


#include "graph.h"

namespace Avalanche {

void mgrab(integer x1, integer y1, integer x2, integer y2, word size) {
	integer yy;
	word aapos;
	byte length, bit;
	if (size > arraysize) {
		output << "*** SORRY! *** Increase the arraysize constant to be greater" << NL;
		output << " than " << size << '.' << NL;
		exit(0);
	}

	aapos = 0;

	length = x2 - x1;

	for (bit = 0; bit <= 3; bit ++) {
		port[0x3c4] = 2;
		port[0x3ce] = 4;
		port[0x3c5] = 1 << bit;
		port[0x3cf] = bit;
		for (yy = y1; yy <= y2; yy ++) {
			move(mem[0xa400 * yy * 80 + x1], aa[aapos], length);
			aapos += length;
		}
	}
	bit = getpixel(0, 0);

}

void grab(integer x1, integer y1, integer x2, integer y2, integer realx, integer realy, flavourtype flav,
          boolean mem, boolean nat)
/* yes, I *do* know how to spell "really"! */
{
	word s;
	pointer p;
	chunkblocktype ch;
	/* rectangle(x1,y1,x2,y2); exit;*/
	this_chunk += 1;
	offsets[this_chunk] = filepos(f);


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

	{
		ch.flavour = flav;
		ch.x = realx;
		ch.y = realy;

		ch.xl = x2 - x1;
		ch.yl = y2 - y1;
		ch.size = s;
		ch.memorise = mem;
		ch.natural = nat;
	}

	setvisualpage(1);
	setactivepage(1);
	input >> NL;
	putimage(ch.x, ch.y, p, 0);

	if (flav == ch_ega) {
		freemem(p, s);
		s = 4 * (((x2 / 8) - (x1 / 8)) + 2) * (y2 - y1 + 1);
		{
			ch.size = s;
			ch.x = ch.x / 8;
			ch.xl = ((realx - ch.x * 8) + (x2 - x1) + 7) / 8;
			mgrab(ch.x, ch.y, ch.x + ch.xl, ch.y + ch.yl, s);
		}
	} else
		/* For BGI pictures. */
	{
		ch.x = ch.x / 8;
		ch.xl = (ch.xl + 7) / 8;
		ch.size = imagesize(ch.x * 8, ch.y, (ch.x + ch.xl) * 8, ch.y + ch.yl);
	}

	input >> NL;
	setvisualpage(0);
	setactivepage(0);

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

	switch (flav) {
	case ch_ega :
		if (! nat)  blockwrite(f, aa, s);
		break;
	case ch_bgi : {
		if (! nat)  blockwrite(f, p, s);
		freemem(p, s);
	}
	break;
	}
	/* rectangle(x1,y1,x2,y2);*/
}

} // End of namespace Avalanche.