1 files changed, 215 insertions, 0 deletions
diff --git a/krita/core/kis_histogram.cc b/krita/core/kis_histogram.cc
new file mode 100644
index 00000000..97fdeac4
--- /dev/null
+++ b/krita/core/kis_histogram.cc
@@ -0,0 +1,215 @@
+/*
+ *  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";
+}