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/*
Copyright 2010 Christian Vetter veaac.fdirct@gmail.com
This file is part of MoNav.
MoNav 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.
MoNav 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 MoNav. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mapnikrendererclient.h"
#include "utils/qthelpers.h"
#include <QtDebug>
MapnikRendererClient::MapnikRendererClient()
{
m_fileZoom = -1;
m_indexFile = NULL;
m_tileFile = NULL;
}
MapnikRendererClient::~MapnikRendererClient()
{
}
void MapnikRendererClient::unload()
{
m_boxes.clear();
if ( m_indexFile != NULL )
delete m_indexFile;
if ( m_tileFile != NULL )
delete m_tileFile;
m_indexFile = NULL;
m_tileFile = NULL;
}
QString MapnikRendererClient::GetName()
{
return "Mapnik Renderer";
}
bool MapnikRendererClient::IsCompatible( int fileFormatVersion )
{
if ( fileFormatVersion == 1 )
return true;
return false;
}
bool MapnikRendererClient::load()
{
QString filename = fileInDirectory( m_directory, "Mapnik Renderer" );
FileStream configData( filename );
if ( !configData.open( QIODevice::ReadOnly ) )
return false;
quint32 zoomLevels, size;
configData >> size >> zoomLevels;
m_tileSize = size;
for ( int i = 0; i < ( int ) zoomLevels; i++ )
{
quint32 zoom, minX, maxX, minY, maxY;
configData >> zoom >> minX >> maxX >> minY >> maxY;
if ( configData.status() == QDataStream::ReadPastEnd )
return false;
Box box;
box.minX = minX;
box.maxX = maxX;
box.minY = minY;
box.maxY = maxY;
m_boxes.resize( zoom + 1 );
m_boxes[zoom] = box;
m_zoomLevels.push_back( zoom );
}
m_fileZoom = -1;
m_indexFile = new QFile( this );
m_tileFile = new QFile( this );
return true;
}
bool MapnikRendererClient::loadTile( int x, int y, int zoom, int /*magnification*/, QPixmap** tile )
{
const Box& box = m_boxes[zoom];
if ( x < box.minX || x >= box.maxX )
return false;
if ( y < box.minY || y >= box.maxY )
return false;
if ( m_fileZoom != zoom ) {
m_indexFile->close();
m_tileFile->close();
QString filename = fileInDirectory( m_directory, "Mapnik Renderer" );
m_indexFile->setFileName( filename + QString( "_%1_index" ).arg( zoom ) );
if ( !openQFile( m_indexFile, QIODevice::ReadOnly ) )
return false;
m_tileFile->setFileName( filename + QString( "_%1_tiles" ).arg( zoom ) );
if ( !openQFile( m_tileFile, QIODevice::ReadOnly ) )
return false;
m_fileZoom = zoom;
}
qint64 indexPosition = qint64( y - box.minY ) * ( box.maxX - box.minX ) + ( x - box.minX );
m_indexFile->seek( indexPosition * ( sizeof( qint64 ) + sizeof( int ) ) );
qint64 start;
int size;
m_indexFile->read( ( char* ) &start, sizeof( start ) );
m_indexFile->read( ( char* ) &size, sizeof( size ) );
if ( size == 0 )
return false;
m_tileFile->seek( start );
QByteArray data = m_tileFile->read( size );
*tile = new QPixmap( m_tileSize, m_tileSize );
if ( !( *tile )->loadFromData( data, "PNG" ) ) {
qDebug() << "Failed to load picture:" << x << y << zoom << " data: (" << start << "-" << start + size << ")";
delete *tile;
return false;
}
return true;
}
Q_EXPORT_PLUGIN2( mapnikrendererclient, MapnikRendererClient )
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