/// <summary>
/// This will update the address templates and remove empty addresses
/// </summary>
/// <param name="context"></param>
private void UpdateAddressesTemplates(ImageCreationContext context)
{
var address = IsValidAddress(context.DataContainer.BaseLayer.Address)
? context.DataContainer.BaseLayer.Address
: GetBaseAddressFromInvalidString(context.DataContainer.BaseLayer.Address);
var addressTemplates = new List <AddressAndOpacity>
{
new AddressAndOpacity {
Address = FixAdrressTemplate(address), Opacity = context.DataContainer.BaseLayer.Opacity ?? 1.0
}
};
foreach (var layerData in context.DataContainer.Overlays ?? new List <LayerData>())
{
if (IsValidAddress(layerData.Address) == false)
{
continue;
}
var addressAndOpacity = new AddressAndOpacity
{
Address = FixAdrressTemplate(layerData.Address),
Opacity = layerData.Opacity ?? 1.0
};
addressTemplates.Add(addressAndOpacity);
}
context.AddressesTemplates = addressTemplates.ToArray();
}
private static AddressAndOpacity[] GetAddressTemplates(DataContainer dataContainer)
{
var address = string.IsNullOrWhiteSpace(dataContainer.BaseLayer.Address)
? "https://israelhiking.osm.org.il/Hebrew/tiles/{z}/{x}/{y}.png"
: dataContainer.BaseLayer.Address;
var addressTemplates = new List <AddressAndOpacity>
{
new AddressAndOpacity {
Address = FixAdrressTemplate(address), Opacity = dataContainer.BaseLayer.Opacity ?? 1.0
}
};
foreach (var layerData in dataContainer.Overlays ?? new List <LayerData>())
{
if (string.IsNullOrWhiteSpace(layerData.Address))
{
continue;
}
var addressAndOpacity = new AddressAndOpacity
{
Address = FixAdrressTemplate(layerData.Address),
Opacity = layerData.Opacity ?? 1.0
};
addressTemplates.Add(addressAndOpacity);
}
return(addressTemplates.ToArray());
}
/// <summary>
/// This will update the address templates and remove empty addresses
/// </summary>
/// <param name="context"></param>
private void UpdateAddressesTemplates(ImageCreationContext context)
{
var address = IsValidAddress(context.DataContainer.BaseLayer.Address) == false
? "https://israelhiking.osm.org.il/Hebrew/tiles/{z}/{x}/{y}.png"
: context.DataContainer.BaseLayer.Address;
var addressTemplates = new List <AddressAndOpacity>
{
new AddressAndOpacity {
Address = FixAdrressTemplate(address), Opacity = context.DataContainer.BaseLayer.Opacity ?? 1.0
}
};
foreach (var layerData in context.DataContainer.Overlays ?? new List <LayerData>())
{
if (IsValidAddress(layerData.Address) == false)
{
continue;
}
var addressAndOpacity = new AddressAndOpacity
{
Address = FixAdrressTemplate(layerData.Address),
Opacity = layerData.Opacity ?? 1.0
};
addressTemplates.Add(addressAndOpacity);
}
context.AddressesTemplates = addressTemplates.ToArray();
}
/// <summary>
/// This method will fetch the relevant image
/// If the required zoom is too big it will fetch and image from a lower zoom and split the relevant part of it
/// This allow the other parts of the algorithm to be ignorat to the max zoom .
/// </summary>
/// <param name="topLeft">Top left corner</param>
/// <param name="offset">Offset from corner</param>
/// <param name="zoom">required zoom level</param>
/// <param name="addressTemplate">The address template to fetch the file from</param>
/// <returns></returns>
private async Task <ImageWithOffset> GetTileImage(Point topLeft, Point offset, int zoom, AddressAndOpacity addressTemplate)
{
var xY = new Point(topLeft.X + offset.X, topLeft.Y + offset.Y);
var translatedXy = xY;
var zoomDifference = Math.Pow(2, zoom - MAX_ZOOM);
if (zoomDifference > 1)
{
// zoom is above max native zoom
zoom = MAX_ZOOM;
translatedXy = new Point
{
X = (int)(xY.X / zoomDifference),
Y = (int)(xY.Y / zoomDifference),
};
}
var file = addressTemplate.Address.Replace("{z}", "{zoom}")
.Replace("{zoom}", zoom.ToString())
.Replace("{x}", translatedXy.X.ToString())
.Replace("{y}", translatedXy.Y.ToString());
var fileResponse = await _remoteFileFetcherGateway.GetFileContent(file);
if (!fileResponse.Content.Any())
{
return(new ImageWithOffset
{
Image = new Image <Rgba32>(TILE_SIZE, TILE_SIZE),
Offset = offset
});
}
var image = Image.Load(fileResponse.Content);
if (addressTemplate.Opacity < 1.0)
{
image.Mutate(x => x.Opacity((float)addressTemplate.Opacity));
}
if (zoomDifference > 1)
{
MagnifyImagePart(image, zoomDifference, xY, translatedXy);
}
return(new ImageWithOffset
{
Image = image,
Offset = offset
});
}
private async Task <ImageWithOffset> GetTileImage(Point topLeft, Point offset, int zoom, AddressAndOpacity addressTemplate)
{
var file = addressTemplate.Address.Replace("{z}", zoom.ToString())
.Replace("{zoom}", zoom.ToString())
.Replace("{x}", (topLeft.X + offset.X).ToString())
.Replace("{y}", (topLeft.Y + offset.Y).ToString());
var fileResponse = await _remoteFileFetcherGateway.GetFileContent(file);
if (!fileResponse.Content.Any())
{
return(new ImageWithOffset
{
Image = new Bitmap(TILE_SIZE, TILE_SIZE),
Offset = offset
});
}
var image = Image.FromStream(new MemoryStream(fileResponse.Content), true);
if (addressTemplate.Opacity < 1.0)
{
image = ChangeOpacity(image, addressTemplate.Opacity);
}
return(new ImageWithOffset
{
Image = image,
Offset = offset
});
}
