bool find(_Key key, out Image image)
{
D.assert(this.validate);
var entry = this._head;
while (entry != null)
{
if (entry.key == key)
{
image = entry.image;
// move to the head of our list, so we purge it last
this.release(entry);
this.attachToHead(entry);
D.assert(this.validate);
return(true);
}
entry = entry.next;
}
D.assert(this.validate);
image = null;
return(false);
}
public Image getGradient(List <Color> colors, List <float> positions)
{
var key = new _Key(colors, positions);
if (!this.find(key, out var image))
{
image = this.fillGradient(colors, positions);
this.add(key, image);
}
return(image);
}
void add(_Key key, Image image)
{
if (this._entryCount == this.maxEntries)
{
D.assert(this._tail != null);
this.release(this._tail);
this._entryCount--;
}
var entry = new _Entry {
key = key, image = image
};
this.attachToHead(entry);
this._entryCount++;
}
get => _Key; set => SetProperty(ref _Key, value);
/// <summary>
///
/// </summary>
/// <param name="key"></param>
/// <param name="c"></param>
/// <param name="d"></param>
public SipHash(_Key key, ushort c = DefaultC, ushort d = DefaultD)
{
_key = key;
_c = c;
_d = d;
}
