public CachedColorMap(ColorRamp ramp, StretchBase stretch, int desiredDestinationBins)
{
if (stretch == null)
{
throw new ArgumentNullException("stretch");
}
m_ramp = ramp;
m_map = new IntervalMap(stretch, desiredDestinationBins, false);
// allow overflow
m_bins = new int[m_map.Count + 1];
foreach (var interval in m_map.GetIntervals())
{
m_bins[interval.Index] = m_ramp.GetColor(interval.StretchRatio).ToArgb();
}
// overflow
m_bins[m_bins.Length - 1] = m_bins[m_bins.Length - 2];
}
public IntervalMap(StretchBase stretch, int desiredDestinationBins, bool scaleDesiredBinsToStretchRange)
{
m_scaleDesiredBinsToStretchRange = scaleDesiredBinsToStretchRange;
m_stretch = stretch;
m_binCountDesired = desiredDestinationBins;
m_binCountEstimated = m_binCountDesired;
// determine how many total bins are required if the
// desired bin count is used for the stretch range
if (m_scaleDesiredBinsToStretchRange)
{
m_binCountEstimated = (int)(m_binCountEstimated / m_stretch.StretchRatio);
}
m_actualRangePow = (int)Math.Ceiling(Math.Log(m_stretch.ActualRange, 2));
//m_actualRange = (uint)Math.Pow(2, m_actualRangePow);
//// handle max range overflow (unlikely)
//if (m_actualRangePow == 32)
// m_actualRange = uint.MaxValue;
m_binCountPow = (int)Math.Ceiling(Math.Log(m_binCountEstimated, 2));
// make sure that there are not more bins than discrete values
if (m_binCountPow > m_actualRangePow)
{
m_binCountPow = m_actualRangePow;
}
m_binCount = (int)Math.Pow(2, m_binCountPow);
m_rightShift = (m_actualRangePow - m_binCountPow);
m_actualMinShifted = m_stretch.ActualMin >> m_rightShift;
m_actualMaxShifted = m_stretch.ActualMax >> m_rightShift;
m_stretchMinShifted = m_stretch.StretchMin >> m_rightShift;
m_stretchMaxShifted = m_stretch.StretchMax >> m_rightShift;
}
public IntervalMap(StretchBase stretch, int desiredDestinationBins, bool scaleDesiredBinsToStretchRange)
{
m_scaleDesiredBinsToStretchRange = scaleDesiredBinsToStretchRange;
m_stretch = stretch;
m_binCountDesired = desiredDestinationBins;
m_binCountEstimated = m_binCountDesired;
// determine how many total bins are required if the
// desired bin count is used for the stretch range
if (m_scaleDesiredBinsToStretchRange)
m_binCountEstimated = (int)(m_binCountEstimated / m_stretch.StretchRatio);
m_actualRangePow = (int)Math.Ceiling(Math.Log(m_stretch.ActualRange, 2));
//m_actualRange = (uint)Math.Pow(2, m_actualRangePow);
//// handle max range overflow (unlikely)
//if (m_actualRangePow == 32)
// m_actualRange = uint.MaxValue;
m_binCountPow = (int)Math.Ceiling(Math.Log(m_binCountEstimated, 2));
// make sure that there are not more bins than discrete values
if (m_binCountPow > m_actualRangePow)
m_binCountPow = m_actualRangePow;
m_binCount = (int)Math.Pow(2, m_binCountPow);
m_rightShift = (m_actualRangePow - m_binCountPow);
m_actualMinShifted = m_stretch.ActualMin >> m_rightShift;
m_actualMaxShifted = m_stretch.ActualMax >> m_rightShift;
m_stretchMinShifted = m_stretch.StretchMin >> m_rightShift;
m_stretchMaxShifted = m_stretch.StretchMax >> m_rightShift;
}
public CachedColorMap CreateCachedRamp(StretchBase stretch, int desiredDestinationBins)
{
var cachedRamp = new CachedColorMap(this, stretch, desiredDestinationBins);
return(cachedRamp);
}