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/*
* Copyright (c) 2004 Boudewijn Rempt
* (c) 2005 Bart Coppens <kde@bartcoppens.be>
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <kdebug.h>
#include <qdatetime.h> // ### Debug
#include "kis_types.h"
#include "kis_histogram.h"
#include "kis_paint_layer.h"
#include "kis_iterators_pixel.h"
#include "kis_colorspace.h"
#include "kis_debug_areas.h"
KisHistogram::KisHistogram(KisPaintLayerSP layer,
KisHistogramProducerSP producer,
const enumHistogramType type)
{
m_dev = layer->paintDevice();
m_type = type;
m_producer = producer;
m_selection = false;
m_channel = 0;
updateHistogram();
}
KisHistogram::KisHistogram(KisPaintDeviceSP paintdev,
KisHistogramProducerSP producer,
const enumHistogramType type)
{
m_dev = paintdev;
m_type = type;
m_producer = producer;
m_selection = false;
m_channel = 0;
updateHistogram();
}
KisHistogram::~KisHistogram()
{
}
void KisHistogram::updateHistogram()
{
Q_INT32 x,y,w,h;
m_dev->exactBounds(x,y,w,h);
KisRectIteratorPixel srcIt = m_dev->createRectIterator(x,y,w,h, false);
KisColorSpace* cs = m_dev->colorSpace();
QTime t;
t.start();
// Let the producer do it's work
m_producer->clear();
int i;
// Handle degenerate case (this happens with the accumulating histogram,
// which has an empty device)
if (srcIt.isDone()) {
m_producer->addRegionToBin(0, 0, 0, cs);
} else {
while ( !srcIt.isDone() ) {
i = srcIt.nConseqPixels();
m_producer->addRegionToBin(srcIt.rawData(), srcIt.selectionMask(), i, cs);
srcIt += i;
}
}
computeHistogram();
}
void KisHistogram::computeHistogram()
{
m_completeCalculations = calculateForRange(m_producer->viewFrom(),
m_producer->viewFrom() + m_producer->viewWidth());
if (m_selection) {
m_selectionCalculations = calculateForRange(m_selFrom, m_selTo);
} else {
m_selectionCalculations.clear();
}
#if 1
dump();
#endif
}
KisHistogram::Calculations KisHistogram::calculations() {
return m_completeCalculations.at(m_channel);
}
KisHistogram::Calculations KisHistogram::selectionCalculations() {
return m_selectionCalculations.at(m_channel);
}
QValueVector<KisHistogram::Calculations> KisHistogram::calculateForRange(double from, double to) {
QValueVector<Calculations> calculations;
uint count = m_producer->channels().count();
for (uint i = 0; i < count; i++) {
calculations.append(calculateSingleRange(i, from, to));
}
return calculations;
}
KisHistogram::Calculations KisHistogram::calculateSingleRange(int channel, double from, double to) {
Calculations c;
// XXX If from == to, we only want a specific bin, handle that properly!
double max = from, min = to, total = 0.0, mean = 0.0; //, median = 0.0, stddev = 0.0;
Q_UINT32 high = 0, low = (Q_UINT32) -1, count = 0;
if (m_producer->count() == 0) {
// We won't get anything, even if a range is specified
// XXX make sure all initial '0' values are correct here!
return c;
}
Q_INT32 totbins = m_producer->numberOfBins();
Q_UINT32 current;
// convert the double range into actual bins:
double factor = static_cast<double>(totbins) / m_producer->viewWidth();
Q_INT32 fromBin = static_cast<Q_INT32>((from - m_producer->viewFrom()) * factor);
Q_INT32 toBin = fromBin + static_cast<Q_INT32>((to - from) * factor);
// Min, max, count, low, high
for (Q_INT32 i = fromBin; i < toBin; i++) {
current = m_producer->getBinAt(channel, i);
double pos = static_cast<double>(i) / factor + from;
if (current > high)
high = current;
if (current < low)
low = current;
if (current > 0) {
if (pos < min)
min = pos;
if (pos > max)
max = pos;
}
// We do the count here as well.
// we can't use m_producer->count() for this, because of the range
count += current;
total += current * pos;
}
if (count > 0)
mean = total / count;
c.m_high = high;
c.m_low = low;
c.m_count = count;
c.m_min = min;
c.m_max = max;
c.m_mean = mean;
c.m_total = total;
return c;
}
void KisHistogram::dump() {
kdDebug(DBG_AREA_MATH) << "Histogram\n";
switch (m_type) {
case LINEAR:
kdDebug(DBG_AREA_MATH) << "Linear histogram\n";
break;
case LOGARITHMIC:
kdDebug(DBG_AREA_MATH) << "Logarithmic histogram\n";
}
kdDebug(DBG_AREA_MATH) << "Dumping channel " << m_channel << endl;
Calculations c = calculations();
/* for( int i = 0; i <256; ++i ) {
kdDebug(DBG_AREA_MATH) << "Value "
<< QString().setNum(i)
<< ": "
<< QString().setNum(m_values[i])
<< "\n";
}*/
kdDebug(DBG_AREA_MATH) << "\n";
kdDebug(DBG_AREA_MATH) << "Max: " << QString().setNum(c.getMax()) << "\n";
kdDebug(DBG_AREA_MATH) << "Min: " << QString().setNum(c.getMin()) << "\n";
kdDebug(DBG_AREA_MATH) << "High: " << QString().setNum(c.getHighest()) << "\n";
kdDebug(DBG_AREA_MATH) << "Low: " << QString().setNum(c.getLowest()) << "\n";
kdDebug(DBG_AREA_MATH) << "Mean: " << m_producer->positionToString(c.getMean()) << "\n";
kdDebug(DBG_AREA_MATH) << "Total: " << QString().setNum(c.getTotal()) << "\n";
// kdDebug(DBG_AREA_MATH) << "Median: " << QString().setNum(m_median) << "\n";
// kdDebug(DBG_AREA_MATH) << "Stddev: " << QString().setNum(m_stddev) << "\n";
// kdDebug(DBG_AREA_MATH) << "percentile: " << QString().setNum(m_percentile) << "\n";
kdDebug(DBG_AREA_MATH) << "\n";
}
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