public override tiles_output getTile(int zoomLevel, int column, int row)
{
tiles_output result = null;
int currentZoomLevel = zoomLevel;
try
{
maxzoom_output value = getMaxZoom();
int maxZoom = value.value;
if (zoomLevel > maxZoom)
{
currentZoomLevel = maxZoom;
}
}
catch (Exception)
{
}
tiles til = db.Query <tiles>("SELECT * FROM tiles WHERE zoom_level = ? AND tile_column = ? AND tile_row = ?", currentZoomLevel, column, row).FirstOrDefault();
if (til != null)
{
string data = ConstantMbTilePlugin.Base64EncodeByte(til.tile_data);
result = new tiles_output(data);
}
return(result);
}
public override maxzoom_output getMaxZoom()
{
maxzoom_output result = null;
tiles zoom_max = db.Query <tiles>("SELECT * FROM tiles ORDER BY zoom_level DESC LIMIT 1").FirstOrDefault();
if (zoom_max != null)
{
result = new maxzoom_output(zoom_max.zoom_level);
}
return(result);
}
public override minzoom_output getMinZoom()
{
minzoom_output result = null;
tiles zoom_min = db.Query <tiles>("SELECT * FROM tiles ORDER BY zoom_level ASC LIMIT 1").FirstOrDefault();
if (zoom_min != null)
{
result = new minzoom_output(zoom_min.zoom_level);
}
return(result);
}