/* 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#include "common/archive.h"
#include "common/stream.h"

#include "prince/pscr.h"
#include "prince/resource.h"

namespace Prince {

PScr::PScr() : _x(0), _y(0), _step(0), _surface(nullptr)
{
}

PScr::~PScr() {
	if (_surface != nullptr) {
		_surface->free();
		delete _surface;
		_surface = nullptr;
	}
}

void PScr::loadSurface(Common::SeekableReadStream &stream) {
	stream.skip(4);
	int width = stream.readUint16LE();
	int height = stream.readUint16LE();
	_surface = new Graphics::Surface();
	_surface->create(width, height, Graphics::PixelFormat::createFormatCLUT8());

	for (int h = 0; h < _surface->h; h++) {
		stream.read(_surface->getBasePtr(0, h), _surface->w);
	}
}

bool PScr::loadFromStream(Common::SeekableReadStream &stream) {
	int32 pos = stream.pos();
	uint16 file = stream.readUint16LE();
	if (file == 0xFFFF) {
		return false;
	}
	_x = stream.readUint16LE();
	_y = stream.readUint16LE();
	_step = stream.readUint16LE();

	const Common::Path pscrStreamName(Common::String::format("PS%02d", file));
	Common::SeekableReadStream *pscrStream = SearchMan.createReadStreamForMember(pscrStreamName);
	if (pscrStream != nullptr) {
		pscrStream = Resource::getDecompressedStream(pscrStream);

		loadSurface(*pscrStream);
	}
	delete pscrStream;
	stream.seek(pos + 12); // size of PScrList struct

	return true;
}

} // End of namespace Prince