/* 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.
 *
 * $URL$
 * $Id$
 *
 */

#include "kyra/screen_v3.h"

#include "kyra/kyra_v3.h"

namespace Kyra {

Screen_v3::Screen_v3(KyraEngine_v3 *vm, OSystem *system) : ScreenEx(vm, system) {
}

Screen_v3::~Screen_v3() {
}

void Screen_v3::setScreenDim(int dim) {
	debugC(9, kDebugLevelScreen, "Screen_v3::setScreenDim(%d)", dim);
	assert(dim < _screenDimTableCount);
	_curDim = &_screenDimTable[dim];
}

const ScreenDim *Screen_v3::getScreenDim(int dim) {
	debugC(9, kDebugLevelScreen, "Screen_v3::getScreenDim(%d)", dim);
	assert(dim < _screenDimTableCount);
	return &_screenDimTable[dim];
}

int Screen_v3::getLayer(int x, int y) {
	debugC(9, kDebugLevelScreen, "Screen_v3::getLayer(%d, %d)", x, y);
	if (x < 0)
		x = 0;
	else if (x >= 320)
		x = 319;
	if (y < 0)
		y = 0;
	else if (y >= 188)
		y = 187;

	if (y < _maskMinY || y > _maskMaxY)
		return 15;

	uint8 pixel = *(getCPagePtr(5) + y * 320 + x);
	pixel &= 0x7F;
	pixel >>= 3;

	if (pixel < 1)
		pixel = 1;
	else if (pixel > 15)
		pixel = 15;
	return pixel;
}

} // end of namespace Kyra