TileLoaderHelper.cpp

/*
    SPDX-FileCopyrightText: 2005-2007 Torsten Rahn <tackat@kde.org>
    SPDX-FileCopyrightText: 2007 Inge Wallin <ingwa@kde.org>
    SPDX-FileCopyrightText: 2008 Patrick Spendrin <ps_ml@gmx.de>
    SPDX-FileCopyrightText: 2008 Jens-Michael Hoffmann <jensmh@gmx.de>
 
    SPDX-License-Identifier: LGPL-2.0-or-later
*/
 
#include "TileLoaderHelper.h"
 
#include <cmath>
 
#include "MarbleDebug.h"
 
#include "MarbleGlobal.h"
 
namespace Marble
{
 
int TileLoaderHelper::levelToRow( int levelZeroRows, int level )
{
    if ( level < 0 ) {
        mDebug() << QString( "TileLoaderHelper::levelToRow(): Invalid level: %1" )
            .arg( level );
        return 0;
    }
    return levelZeroRows << level;
}
 
int TileLoaderHelper::levelToColumn( int levelZeroColumns, int level )
{
    if ( level < 0 ) {
        mDebug() << QString( "TileLoaderHelper::levelToColumn(): Invalid level: %1" )
            .arg( level );
        return 0;
    }
    return levelZeroColumns << level;
}
 
int TileLoaderHelper::rowToLevel( int levelZeroRows, int row )
{
    if ( row < levelZeroRows ) {
        mDebug() << QString( "TileLoaderHelper::rowToLevel(): Invalid number of rows: %1" )
            .arg( row );
        return 0;
    }
    return (int)( std::log( (qreal)(row / levelZeroRows) ) / std::log( (qreal)2.0 ) );
}
 
int TileLoaderHelper::columnToLevel( int levelZeroColumns, int column )
{
    if ( column < levelZeroColumns ) {
        mDebug() << QString( "TileLoaderHelper::columnToLevel(): Invalid number of columns: %1" )
        .arg( column );
        return 0;
    }
    return (int)( std::log( (qreal)(column / levelZeroColumns) ) / std::log( (qreal)2.0 ) );
}
 
}