/* -*- tab-width: 4 -*-
*
* Electric(tm) VLSI Design System
*
* File: DerivedSignal.java
*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
*
* Electric(tm) is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Electric(tm) is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Electric(tm); see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, Mass 02111-1307, USA.
*/
package com.sun.electric.tool.simulation;
import com.sun.electric.database.geometry.PolyBase;
import com.sun.electric.tool.user.waveform.Panel;
import com.sun.electric.tool.user.waveform.WaveSignal;
import com.sun.electric.tool.user.waveform.Panel.WaveSelection;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.geom.Rectangle2D;
import java.util.List;
/**
* A Signal which is derived in a *pointwise* fashion from other
* signals. This means that the min/max estimate for the signal over
* the time period [t0:t1] must depend only on the min/max estimate
* for the source signals over that same range. So, for example, a
* convolution cannot be represented using this class.
*/
public abstract class DerivedSignal<SNew extends Sample, SOld extends Sample> extends Signal<SNew>
{
private final Signal<SOld>[] sources;
public DerivedSignal(SignalCollection sc, Stimuli sd, String signalName, String signalContext,
boolean digital, Signal<SOld>[] sources)
{
super(sc, sd, signalName, signalContext, digital);
this.sources = sources;
}
public Signal.View<RangeSample<SNew>> getRasterView(double t0, double t1, int numPixels)
{
View<RangeSample<SOld>>[] views = new View[sources.length];
for(int i=0; i<views.length; i++)
views[i] = sources[i].getRasterView(t0, t1, numPixels);
return new DerivedSignalRasterView(views);
}
private class DerivedSignalRasterView implements View<RangeSample<SNew>>
{
private View<RangeSample<SOld>>[] views;
private RangeSample<SOld>[] scratch;
public DerivedSignalRasterView(View<RangeSample<SOld>>[] views)
{
this.views = views;
scratch = new RangeSample[views.length];
}
public int getNumEvents() { return views[0].getNumEvents(); }
public double getTime(int event) { return views[0].getTime(event); }
public RangeSample<SNew> getSample(int event)
{
for(int i=0; i<scratch.length; i++)
scratch[i] = views[i].getSample(event);
RangeSample<SNew> ret = getDerivedRange(scratch);
for(int i=0; i<scratch.length; i++) scratch[i] = null;
return ret;
}
}
public double getMinTime()
{
double min = -Double.MAX_VALUE;
for(int i=0; i<sources.length; i++)
min = Math.max(min, sources[i].getMinTime());
return min;
}
public double getMaxTime()
{
double max = Double.MAX_VALUE;
for(int i=0; i<sources.length; i++)
max = Math.min(max, sources[i].getMaxTime());
return max;
}
public Signal.View<SNew> getExactView()
{
if (sources.length==1)
return new DerivedSignalExactView(sources[0].getExactView());
throw new RuntimeException("Exact views of DerivedSignal's with >1 source are not supported");
}
private class DerivedSignalExactView implements View<SNew>
{
private View<SOld> view;
public DerivedSignalExactView(View<SOld> view) { this.view = view; }
public int getNumEvents() { return view.getNumEvents(); }
public double getTime(int event) { return view.getTime(event); }
public SNew getSample(int event)
{
SOld old = view.getSample(event);
return getDerivedRange(new RangeSample[] { new RangeSample<SOld>(old, old) }).getMin() /* FIXME: arbitrary */;
}
}
protected abstract RangeSample<SNew> getDerivedRange(RangeSample<SOld>[] sourceRanges);
public void plot(Panel panel, Graphics g, WaveSignal ws, Color light, List<PolyBase> forPs,
Rectangle2D bounds, List<WaveSelection> selectedObjects, Signal<?> xAxisSignal)
{
throw new RuntimeException("not implemented");
}
}