internal static int FindWrappingLayer(DeepZoomLayer[] layers, int size)
{
if (layers is null)
{
throw new ArgumentNullException(nameof(layers));
}
if (size <= 0)
{
throw new ArgumentOutOfRangeException(nameof(size));
}
int index = 0;
int length = layers.Length;
while (index < layers.Length)
{
DeepZoomLayer layer = layers[index];
if (layer.Width > size || layer.Height > size)
{
return(index);
}
index++;
}
return(length - 1);
}
internal static DeepZoomLayer[] CalculateDeepZoomLayers(int width, int height)
{
if (width <= 0)
{
throw new ArgumentOutOfRangeException(nameof(width));
}
if (height <= 0)
{
throw new ArgumentOutOfRangeException(nameof(height));
}
var layers = new List <DeepZoomLayer>(20);
DeepZoomLayer currentLayer = new DeepZoomLayer(width, height);
layers.Add(currentLayer);
while (currentLayer.Width != 1 || currentLayer.Height != 1)
{
currentLayer = new DeepZoomLayer((currentLayer.Width + 1) / 2, (currentLayer.Height + 1) / 2);
layers.Add(currentLayer);
}
DeepZoomLayer[] layersArray = layers.ToArray();
Array.Reverse(layersArray);
return(layersArray);
}