/*******************************************************************************
  This file is part of LayoutStudio (http://github.com/Treeki/LayoutStudio)
  Copyright (c) 2010 Treeki (treeki@gmail.com)

  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, version 2.0.

  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 2.0 for more details.

  You should have received a copy of the GNU General Public License 2.0
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*******************************************************************************/

#ifndef LYTCOMMON_H
#define LYTCOMMON_H

#include <QtGlobal>
#include <QtCore/QByteArray>
#include <QtGui/QColor>
#include <QtCore/QPointF>
#include <QtCore/QDataStream>
#include <QtCore/QStringList>
#include <QtCore/QDebug>
#include <QtCore/QVector>

union Magic {
	char str[4];
	quint32 value;
};

union Version {
	char str[2];
	quint16 value;
};



inline quint32 BitExtract(quint32 value, int count, int start) {
	// this function relies on heavy compiler optimisation to be efficient :p
	quint32 mask = 0;
	for (int i = start; i < start+count; i++) {
		mask |= (0x80000000 >> i);
	}

	return (value & mask) >> (32 - (start + count));
}

inline quint32 BitInsert(quint32 value, int newValue, int count, int start) {
	quint32 mask = 0;
	for (int i = start; i < start+count; i++) {
		mask |= (0x80000000 >> i);
	}

	value &= ~mask;
	value |= (newValue << (32 - (start + count))) & mask;
	return value;
}





QByteArray PadByteArray(QByteArray original, int newLength, char padWith='\0');

inline quint32 ColorToRGBA(QColor col) {
	return (col.red() << 24) | (col.green() << 16) | (col.blue() << 8) | (col.alpha());
}

inline QColor RGBAToColor(quint32 col) {
	return QColor(col >> 24, (col >> 16) & 0xFF, (col >> 8) & 0xFF, col & 0xFF);
}

inline void ReadRGBA8Color(QColor &out, QDataStream &in) {
	quint32 col;
	in >> (quint32&)col;
	out = RGBAToColor(col);
}

inline void WriteRGBA8Color(QColor &in, QDataStream &out) {
	out << (quint32)ColorToRGBA(in);
}

inline void ReadS10Color(QColor &out, QDataStream &in) {
	quint16 r, g, b, a;
	in >> (quint16&)r;
	in >> (quint16&)g;
	in >> (quint16&)b;
	in >> (quint16&)a;
	out.setRgb(r, g, b, a);
}

inline void WriteS10Color(QColor &in, QDataStream &out) {
	out << (quint16)in.red();
	out << (quint16)in.green();
	out << (quint16)in.blue();
	out << (quint16)in.alpha();
}




struct LYTTexCoords {
	QPointF coord[4];
};

inline void ReadPointF(QDataStream &stream, QPointF &point) {
	float x, y;
	stream >> x;
	stream >> y;
	point.setX(x);
	point.setY(y);
}

inline void WritePointF(QDataStream &stream, const QPointF &point) {
	stream << (float)point.x();
	stream << (float)point.y();
}

inline void InitDataStream(QDataStream &stream) {
	stream.setByteOrder(QDataStream::BigEndian);
	stream.setVersion(QDataStream::Qt_4_5);
}

QStringList ReadStringList(QDataStream &in);

QString ReadFixedLengthASCII(QDataStream &in, int length);
void WriteFixedLengthASCII(QDataStream &out, QString str, int length);



#endif // LYTCOMMON_H