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/*
* This file is part of Chalk
*
* Copyright (c) 2006 Frederic Coiffier <fcoiffie@gmail.com>
*
* 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 <math.h>
#include <tdelocale.h>
#include <tqlayout.h>
#include <tqpixmap.h>
#include <tqpainter.h>
#include <tqlabel.h>
#include <tqspinbox.h>
#include "kis_filter_config_widget.h"
#include "kis_level_filter.h"
#include "wdg_level.h"
#include "kis_colorspace.h"
#include "kis_paint_device.h"
#include "kis_iterators_pixel.h"
#include "kis_iterator.h"
#include "kis_histogram.h"
#include "kis_basic_histogram_producers.h"
#include "kis_painter.h"
#include "kgradientslider.h"
KisLevelFilterConfiguration::KisLevelFilterConfiguration()
: KisFilterConfiguration( "levels", 1 )
{
whitevalue = 255;
blackvalue = 0;
gammavalue = 1.0;
outwhitevalue = 0xFFFF;
outblackvalue = 0;
m_adjustment = 0;
}
KisLevelFilterConfiguration::~KisLevelFilterConfiguration()
{
delete m_adjustment;
}
void KisLevelFilterConfiguration::fromXML( const TQString& s )
{
KisFilterConfiguration::fromXML(s);
blackvalue = getInt( "blackvalue" );
whitevalue = getInt( "whitevalue" );
gammavalue = getDouble( "gammavalue" );
outblackvalue = getInt( "outblackvalue" );
outwhitevalue = getInt( "outwhitevalue" );
}
TQString KisLevelFilterConfiguration::toString()
{
m_properties.clear();
setProperty("blackvalue", blackvalue);
setProperty("whitevalue", whitevalue);
setProperty("gammavalue", gammavalue);
setProperty("outblackvalue", outblackvalue);
setProperty("outwhitevalue", outwhitevalue);
return KisFilterConfiguration::toString();
}
KisLevelFilter::KisLevelFilter()
: KisFilter( id(), "adjust", i18n("&Levels"))
{
}
KisFilterConfigWidget * KisLevelFilter::createConfigurationWidget(TQWidget *parent, KisPaintDeviceSP dev)
{
return new KisLevelConfigWidget(parent, dev);
}
KisFilterConfiguration* KisLevelFilter::configuration(TQWidget *nwidget)
{
KisLevelConfigWidget* widget = (KisLevelConfigWidget*)nwidget;
if ( widget == 0 )
{
return new KisLevelFilterConfiguration();
} else {
return widget->config();
}
}
std::list<KisFilterConfiguration*> KisLevelFilter::listOfExamplesConfiguration(KisPaintDeviceSP /*dev*/)
{
//XXX should really come up with a list of configurations
std::list<KisFilterConfiguration*> list;
list.insert(list.begin(), new KisLevelFilterConfiguration( ));
return list;
}
bool KisLevelFilter::workWith(KisColorSpace* cs)
{
return (cs->getProfile() != 0);
}
void KisLevelFilter::process(KisPaintDeviceSP src, KisPaintDeviceSP dst, KisFilterConfiguration* config, const TQRect& rect)
{
if (!config) {
kdWarning() << "No configuration object for level filter\n";
return;
}
KisLevelFilterConfiguration* configBC = (KisLevelFilterConfiguration*) config;
Q_ASSERT(config);
if (src!=dst) {
KisPainter gc(dst);
gc.bitBlt(rect.x(), rect.y(), COMPOSITE_COPY, src, rect.x(), rect.y(), rect.width(), rect.height());
gc.end();
}
if (configBC->m_adjustment == 0) {
TQ_UINT16 transfer[256];
for (int i = 0; i < 256; i++) {
if (i <= configBC->blackvalue)
transfer[i] = configBC->outblackvalue;
else if (i < configBC->whitevalue)
{
double a = (double)(i - configBC->blackvalue) / (double)(configBC->whitevalue - configBC->blackvalue);
a = (double)(configBC->outwhitevalue - configBC->outblackvalue) * pow (a, (1.0 / configBC->gammavalue));
transfer[i] = int(configBC->outblackvalue + a);
}
else
transfer[i] = configBC->outwhitevalue;
}
configBC->m_adjustment = src->colorSpace()->createBrightnessContrastAdjustment(transfer);
}
KisRectIteratorPixel iter = dst->createRectIterator(rect.x(), rect.y(), rect.width(), rect.height(), true );
setProgressTotalSteps(rect.width() * rect.height());
TQ_INT32 pixelsProcessed = 0;
while( ! iter.isDone() && !cancelRequested())
{
TQ_UINT32 npix=0, maxpix = iter.nConseqPixels();
TQ_UINT8 selectedness = iter.selectedness();
// The idea here is to handle stretches of completely selected and completely unselected pixels.
// Partially selected pixels are handled one pixel at a time.
switch(selectedness)
{
case MIN_SELECTED:
while(iter.selectedness()==MIN_SELECTED && maxpix)
{
--maxpix;
++iter;
++npix;
}
pixelsProcessed += npix;
break;
case MAX_SELECTED:
{
TQ_UINT8 *firstPixel = iter.rawData();
while(iter.selectedness()==MAX_SELECTED && maxpix)
{
--maxpix;
if (maxpix != 0)
++iter;
++npix;
}
// adjust
src->colorSpace()->applyAdjustment(firstPixel, firstPixel, configBC->m_adjustment, npix);
pixelsProcessed += npix;
++iter;
break;
}
default:
// adjust, but since it's partially selected we also only partially adjust
src->colorSpace()->applyAdjustment(iter.oldRawData(), iter.rawData(), configBC->m_adjustment, 1);
const TQ_UINT8 *pixels[2] = {iter.oldRawData(), iter.rawData()};
TQ_UINT8 weights[2] = {MAX_SELECTED - selectedness, selectedness};
src->colorSpace()->mixColors(pixels, weights, 2, iter.rawData());
++iter;
pixelsProcessed++;
break;
}
setProgress(pixelsProcessed);
}
setProgressDone();
}
KisLevelConfigWidget::KisLevelConfigWidget(TQWidget * parent, KisPaintDeviceSP dev, const char * name, WFlags f)
: KisFilterConfigWidget(parent, name, f)
{
m_page = new WdgLevel(this);
histogram = NULL;
m_page->ingradient->enableGamma(true);
m_page->blackspin->setValue(0);
m_page->whitespin->setValue(255);
m_page->gammaspin->setNum(1.0);
m_page->ingradient->modifyGamma(1.0);
m_page->outblackspin->setValue(0);
m_page->outwhitespin->setValue(255);
TQHBoxLayout * l = new TQHBoxLayout(this);
TQ_CHECK_PTR(l);
l->addWidget(m_page, 0, TQt::AlignTop);
connect( m_page->blackspin, TQT_SIGNAL(valueChanged(int)), TQT_SIGNAL(sigPleaseUpdatePreview()));
connect( m_page->whitespin, TQT_SIGNAL(valueChanged(int)), TQT_SIGNAL(sigPleaseUpdatePreview()));
connect( m_page->ingradient, TQT_SIGNAL(modifiedGamma(double)), TQT_SIGNAL(sigPleaseUpdatePreview()));
connect( m_page->blackspin, TQT_SIGNAL(valueChanged(int)), m_page->ingradient, TQT_SLOT(modifyBlack(int)));
connect( m_page->whitespin, TQT_SIGNAL(valueChanged(int)), m_page->ingradient, TQT_SLOT(modifyWhite(int)));
//connect( m_page->whitespin, TQT_SIGNAL(valueChanged(int)), m_page->ingradient, TQT_SLOT(modifyGamma()));
connect( m_page->ingradient, TQT_SIGNAL(modifiedBlack(int)), m_page->blackspin, TQT_SLOT(setValue(int)));
connect( m_page->ingradient, TQT_SIGNAL(modifiedWhite(int)), m_page->whitespin, TQT_SLOT(setValue(int)));
connect( m_page->ingradient, TQT_SIGNAL(modifiedGamma(double)), m_page->gammaspin, TQT_SLOT(setNum(double)));
connect( m_page->outblackspin, TQT_SIGNAL(valueChanged(int)), TQT_SIGNAL(sigPleaseUpdatePreview()));
connect( m_page->outwhitespin, TQT_SIGNAL(valueChanged(int)), TQT_SIGNAL(sigPleaseUpdatePreview()));
connect( m_page->outblackspin, TQT_SIGNAL(valueChanged(int)), m_page->outgradient, TQT_SLOT(modifyBlack(int)));
connect( m_page->outwhitespin, TQT_SIGNAL(valueChanged(int)), m_page->outgradient, TQT_SLOT(modifyWhite(int)));
connect( m_page->outgradient, TQT_SIGNAL(modifiedBlack(int)), m_page->outblackspin, TQT_SLOT(setValue(int)));
connect( m_page->outgradient, TQT_SIGNAL(modifiedWhite(int)), m_page->outwhitespin, TQT_SLOT(setValue(int)));
connect( (TQObject*)(m_page->chkLogarithmic), TQT_SIGNAL(toggled(bool)), this, TQT_SLOT(drawHistogram(bool)));
KisHistogramProducerSP producer = new KisGenericLabHistogramProducer();
histogram = new KisHistogram(dev, producer, LINEAR);
m_histlog = false;
drawHistogram();
}
KisLevelConfigWidget::~KisLevelConfigWidget()
{
delete histogram;
}
void KisLevelConfigWidget::drawHistogram(bool logarithmic)
{
int height = 256;
if (m_histlog != logarithmic) {
// Update the histogram
if (logarithmic)
histogram->setHistogramType(LOGARITHMIC);
else
histogram->setHistogramType(LINEAR);
m_histlog = logarithmic;
}
TQPixmap pix(256, height);
pix.fill();
TQPainter p(&pix);
p.setPen(TQPen(TQt::gray,1, TQt::SolidLine));
double highest = (double)histogram->calculations().getHighest();
TQ_INT32 bins = histogram->producer()->numberOfBins();
if (histogram->getHistogramType() == LINEAR) {
double factor = (double)height / highest;
for( int i=0; i<bins; ++i ) {
p.drawLine(i, height, i, height - int(histogram->getValue(i) * factor));
}
} else {
double factor = (double)height / (double)log(highest);
for( int i = 0; i < bins; ++i ) {
p.drawLine(i, height, i, height - int(log((double)histogram->getValue(i)) * factor));
}
}
m_page->histview->setPixmap(pix);
}
KisLevelFilterConfiguration * KisLevelConfigWidget::config()
{
KisLevelFilterConfiguration * cfg = new KisLevelFilterConfiguration();
cfg->blackvalue = m_page->blackspin->value();
cfg->whitevalue = m_page->whitespin->value();
cfg->gammavalue = m_page->ingradient->getGamma();
cfg->outblackvalue = m_page->outblackspin->value() * 255;
cfg->outwhitevalue = m_page->outwhitespin->value() * 255;
return cfg;
}
void KisLevelConfigWidget::setConfiguration( KisFilterConfiguration * config )
{
KisLevelFilterConfiguration * cfg = dynamic_cast<KisLevelFilterConfiguration *>(config);
m_page->blackspin->setValue(cfg->blackvalue);
m_page->whitespin->setValue(cfg->whitevalue);
m_page->ingradient->modifyGamma(cfg->gammavalue);
m_page->outblackspin->setValue(cfg->outblackvalue / 255);
m_page->outwhitespin->setValue(cfg->outwhitevalue / 255);
}