/// <summary>
/// Sets the <see cref="IComposableLut"/> field and sets up the LutChanged event handler.
/// </summary>
private void SetLutField <T>(ref T field, T value)
where T : class, IComposableLut
{
if (Equals(field, value))
{
return;
}
if (field != null)
{
field.LutChanged -= OnLutValuesChanged;
}
field = value;
if (field != null)
{
field.LutChanged += OnLutValuesChanged;
}
// clear the LUT pipeline so that it will be reassembled
if (_lutCollection != null)
{
_lutCollection.Clear();
_lutCollection = null;
}
OnLutChanged();
}
public IComposedLut GetLut(LutCollection sourceLuts)
{
IComposedLut lut = _realComposedLut;
if (lut != null)
{
return(lut);
}
lock (_syncLock)
{
if (_realComposedLut != null)
{
return(_realComposedLut);
}
//Trace.WriteLine(String.Format("Creating Composed Lut '{0}'", Key), "LUT");
_realComposedLut = new ComposedLut(sourceLuts.ToArray(), _bufferCache);
//just use the creation time as the "last access time", otherwise it can get expensive when called in a tight loop.
_largeObjectData.UpdateLastAccessTime();
_largeObjectData.BytesHeldCount = _realComposedLut.Data.Length * sizeof(int);
_largeObjectData.LargeObjectCount = 1;
MemoryManager.Add(this);
Diagnostics.OnLargeObjectAllocated(_largeObjectData.BytesHeldCount);
return(_realComposedLut);
}
}
/// <summary>
/// Gets the output LUT of the pipeline,
/// </summary>
public IComposedLut GetOutputLut(int minOutputValue, int maxOutputValue)
{
MinOutputValue = PresentationLut.MinOutputValue = minOutputValue;
MaxOutputValue = PresentationLut.MaxOutputValue = maxOutputValue;
LutCollection.SyncMinMaxValues();
LutCollection.Validate();
return(_cachedLut ?? (_cachedLut = ComposedLutCache.GetLut(LutCollection)));
}
private void SyncMinMaxValues()
{
if (LutCollection.Count > 0)
{
IComposableLut firstLut = LutCollection[0];
firstLut.MinInputValue = _minInputValue;
firstLut.MaxInputValue = _maxInputValue;
}
LutCollection.SyncMinMaxValues();
}
private void OnLutChanged()
{
// clear the LUT pipeline so that it will be reassembled
if (_lutCollection != null)
{
_lutCollection.Clear();
_lutCollection = null;
}
SyncMinMaxValues();
_recalculate = true;
}
private void SyncMinMaxValues()
{
if (LutCollection.Count == 0)
{
return;
}
IComposableLut firstLut = LutCollection[0];
firstLut.MinInputValue = _minInputValue;
firstLut.MaxInputValue = _maxInputValue;
LutCollection.SyncMinMaxValues();
PresentationLut.MinOutputValue = _minOutputValue;
PresentationLut.MaxOutputValue = _maxOutputValue;
}
public ComposedLut(LutCollection luts, BufferCache <int> cache)
{
//luts.Validate();
int lutCount;
IComposableLut firstLut, lastLut;
GetFirstAndLastLut(luts, out firstLut, out lastLut, out lutCount);
_minInputValue = (int)Math.Round(firstLut.MinInputValue);
_maxInputValue = (int)Math.Round(firstLut.MaxInputValue);
_length = _maxInputValue - _minInputValue + 1;
_data = cache != null?cache.Allocate(_length) : MemoryManager.Allocate <int>(_length);
//copy to array because accessing ObservableList's indexer in a tight loop is very expensive
IComposableLut[] lutArray = new IComposableLut[lutCount];
luts.CopyTo(lutArray, 0);
unsafe
{
fixed(int *composedLutData = _data)
{
int *pLutData = composedLutData;
int min = _minInputValue;
int max = _maxInputValue + 1;
for (int i = min; i < max; ++i)
{
double val = i;
for (int j = 0; j < lutCount; ++j)
{
val = lutArray[j][val];
}
*pLutData = (int)Math.Round(val);
++pLutData;
}
}
}
}
internal CachedLutProxy(LutCollection sourceLuts)
{
_sourceLuts = sourceLuts;
}
public static ICachedLut GetLut(LutCollection sourceLuts)
{
Platform.CheckForNullReference(sourceLuts, "sourceLuts");
return(new CachedLutProxy(sourceLuts));
}
public IComposedLut GetLut(LutCollection sourceLuts)
{
return(_cacheItem.GetLut(sourceLuts));
}
public ComposedLut(LutCollection luts) : this(luts, null)
{
}