/* 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 file is based on WME Lite.
 * http://dead-code.org/redir.php?target=wmelite
 * Copyright (c) 2011 Jan Nedoma
 */

#include "engines/wintermute/dcgf.h"
#include "engines/wintermute/Base/BActiveRect.h"
#include "engines/wintermute/Base/BGame.h"
#include "engines/wintermute/Base/BRegion.h"
#include "engines/wintermute/PlatformSDL.h"

namespace WinterMute {

//////////////////////////////////////////////////////////////////////
CBActiveRect::CBActiveRect(CBGame *inGame): CBBase(inGame) {
	CBPlatform::setRectEmpty(&_rect);
	_owner = NULL;
	_frame = NULL;
	_region = NULL;
	_zoomX = 100;
	_zoomY = 100;
	_offsetX = _offsetY = 0;
	clipRect();
}


//////////////////////////////////////////////////////////////////////
CBActiveRect::CBActiveRect(CBGame *inGame, CBObject *owner, CBSubFrame *frame, int x, int y, int width, int height, float zoomX, float zoomY, bool precise): CBBase(inGame) {
	_owner = owner;
	_frame = frame;
	CBPlatform::setRect(&_rect, x, y, x + width, y + height);
	_zoomX = zoomX;
	_zoomY = zoomY;
	_precise = precise;
	_region = NULL;
	_offsetX = _offsetY = 0;
	clipRect();
}

//////////////////////////////////////////////////////////////////////
CBActiveRect::CBActiveRect(CBGame *inGame, CBObject *owner, CBRegion *region, int offsetX, int offsetY): CBBase(inGame) {
	_owner = owner;
	_region = region;
	CBPlatform::copyRect(&_rect, &region->_rect);
	CBPlatform::offsetRect(&_rect, -offsetX, -offsetY);
	_zoomX = 100;
	_zoomY = 100;
	_precise = true;
	_frame = NULL;
	clipRect();
	_offsetX = offsetX;
	_offsetY = offsetY;
}


//////////////////////////////////////////////////////////////////////
CBActiveRect::~CBActiveRect() {
	_owner = NULL;
	_frame = NULL;
	_region = NULL;
}


//////////////////////////////////////////////////////////////////////////
void CBActiveRect::clipRect() {
	Rect32 rc;
	bool customViewport;
	_gameRef->getCurrentViewportRect(&rc, &customViewport);
	CBRenderer *Rend = _gameRef->_renderer;

	if (!customViewport) {
		rc.left -= Rend->_drawOffsetX;
		rc.right -= Rend->_drawOffsetX;
		rc.top -= Rend->_drawOffsetY;
		rc.bottom -= Rend->_drawOffsetY;
	}

	if (rc.left > _rect.left) _offsetX = rc.left - _rect.left;
	if (rc.top  > _rect.top)  _offsetY = rc.top  - _rect.top;

	CBPlatform::intersectRect(&_rect, &_rect, &rc);
}

} // end of namespace WinterMute