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/***************************************************************************
 *   Copyright (C) 2009 by Erik Ölsar                                      *
 *   erlk.ozlr@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; 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.         *
 ***************************************************************************/

#include <QCursor>
#include <QString>
#include <QPixmap>
#include <QImage>
#include <QByteArray>
#include <QFile>
#include <QBitmap>
#include <QtDebug>
#include "cursorimage.h"

QCursor createCursor(QString path)
{
	if (path.isEmpty())
        return QCursor();
	
	// read file headers
	QFile curFile(path);
	curFile.open(QIODevice::ReadOnly);
	QDataStream curStream(&curFile);
	curStream.setByteOrder(QDataStream::LittleEndian);
	
	struct {
		quint16 zero;
		quint16 type;
		quint16 icons;
	} header2;
	curStream >> header2.zero >> header2.type >> header2.icons;

	struct {
		quint8 width;
		quint8 height;
		quint8 ncolours;
		quint8 zero;
		quint16 xhot;
		quint16 yhot;
		quint32 bytes;
		quint32 dibOffset;
	} directory2;
	curStream >> directory2.width >> directory2.height >> directory2.ncolours >> directory2.zero >> directory2.xhot >> directory2.yhot >> directory2.bytes >> directory2.dibOffset;
	
	curFile.seek(directory2.dibOffset);
	
	// prepare a .bmp for delegating decoding to qt
	struct {
		unsigned char magic[2];
		quint32 size;
		quint32 zero;
		quint32 rdataOffset;
	} bmpHeader;
	int bmpHeaderSize = (2+4+4+4);
	struct {
		quint32 hdrSize;
		quint32 width;
		quint32 height;
		quint16 planes;
		quint16 bpp;
		quint32 compression;
		quint32 dataSize;
		quint32 unused1;
		quint32 unused2;
		quint32 unused3;
		quint32 unused4;
	} dibHeader;
	int dibHeaderSize = (4+4+4+2+2+4+4+4+4+4+4);
	
	bmpHeader.magic[0] = 'B'; bmpHeader.magic[1] = 'M';
	bmpHeader.zero = 0;
	bmpHeader.size = bmpHeaderSize + directory2.bytes;
	bmpHeader.rdataOffset = bmpHeaderSize + dibHeaderSize + directory2.ncolours * 4;