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digikam/digikam/imageplugins/coreplugin/hsl/imageeffect_hsl.cpp

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/* ============================================================
*
* This file is a part of digiKam project
* http://www.digikam.org
*
* Date : 2004-07-16
* Description : digiKam image editor to adjust Hue, Saturation,
* and Lightness of picture.
*
* Copyright (C) 2004-2007 by Gilles Caulier <caulier dot gilles at gmail dot 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, 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.
*
* ============================================================ */
// TQt includes.
#include <tqcolor.h>
#include <tqgroupbox.h>
#include <tqhgroupbox.h>
#include <tqvgroupbox.h>
#include <tqvbox.h>
#include <tqhbuttongroup.h>
#include <tqlabel.h>
#include <tqlayout.h>
#include <tqframe.h>
#include <tqlabel.h>
#include <tqpushbutton.h>
#include <tqcombobox.h>
#include <tqwhatsthis.h>
#include <tqtooltip.h>
#include <tqtimer.h>
// KDE includes.
#include <knuminput.h>
#include <klocale.h>
#include <kapplication.h>
#include <tdeconfig.h>
#include <kcursor.h>
#include <kstandarddirs.h>
#include <kcolordialog.h>
// Digikam includes.
#include "imageiface.h"
#include "imagewidget.h"
#include "histogramwidget.h"
#include "colorgradientwidget.h"
#include "hslmodifier.h"
#include "dimg.h"
// Local includes.
#include "hspreviewwidget.h"
#include "imageeffect_hsl.h"
#include "imageeffect_hsl.moc"
namespace DigikamImagesPluginCore
{
ImageEffect_HSL::ImageEffect_HSL(TQWidget* parent)
: Digikam::ImageDlgBase(parent, i18n("Hue/Saturation/Lightness"), "hsladjust", false)
{
m_destinationPreviewData = 0L;
setHelp("hsladjusttool.anchor", "digikam");
m_previewWidget = new Digikam::ImageWidget("hsladjust Tool Dialog", plainPage(),
i18n("<p>Here you can see the image "
"Hue/Saturation/Lightness adjustments preview. "
"You can pick color on image "
"to see the color level corresponding on histogram."));
setPreviewAreaWidget(m_previewWidget);
// -------------------------------------------------------------
TQWidget *gboxSettings = new TQWidget(plainPage());
TQGridLayout* gridSettings = new TQGridLayout(gboxSettings, 11, 4, spacingHint());
TQLabel *label1 = new TQLabel(i18n("Channel:"), gboxSettings);
label1->setAlignment ( TQt::AlignRight | TQt::AlignVCenter );
m_channelCB = new TQComboBox( false, gboxSettings );
m_channelCB->insertItem( i18n("Luminosity") );
m_channelCB->insertItem( i18n("Red") );
m_channelCB->insertItem( i18n("Green") );
m_channelCB->insertItem( i18n("Blue") );
TQWhatsThis::add( m_channelCB, i18n("<p>Select the histogram channel to display here:<p>"
"<b>Luminosity</b>: display the image's luminosity values.<p>"
"<b>Red</b>: display the red image-channel values.<p>"
"<b>Green</b>: display the green image-channel values.<p>"
"<b>Blue</b>: display the blue image-channel values.<p>"));
m_scaleBG = new TQHButtonGroup(gboxSettings);
m_scaleBG->setExclusive(true);
m_scaleBG->setFrameShape(TQFrame::NoFrame);
m_scaleBG->setInsideMargin( 0 );
TQWhatsThis::add( m_scaleBG, i18n("<p>Select the histogram scale here.<p>"
"If the image's maximal counts are small, you can use the linear scale.<p>"
"Logarithmic scale can be used when the maximal counts are big; "
"if it is used, all values (small and large) will be visible on the graph."));
TQPushButton *linHistoButton = new TQPushButton( m_scaleBG );
TQToolTip::add( linHistoButton, i18n( "<p>Linear" ) );
m_scaleBG->insert(linHistoButton, Digikam::HistogramWidget::LinScaleHistogram);
TDEGlobal::dirs()->addResourceType("histogram-lin", TDEGlobal::dirs()->kde_default("data") + "digikam/data");
TQString directory = TDEGlobal::dirs()->findResourceDir("histogram-lin", "histogram-lin.png");
linHistoButton->setPixmap( TQPixmap( directory + "histogram-lin.png" ) );
linHistoButton->setToggleButton(true);
TQPushButton *logHistoButton = new TQPushButton( m_scaleBG );
TQToolTip::add( logHistoButton, i18n( "<p>Logarithmic" ) );
m_scaleBG->insert(logHistoButton, Digikam::HistogramWidget::LogScaleHistogram);
TDEGlobal::dirs()->addResourceType("histogram-log", TDEGlobal::dirs()->kde_default("data") + "digikam/data");
directory = TDEGlobal::dirs()->findResourceDir("histogram-log", "histogram-log.png");
logHistoButton->setPixmap( TQPixmap( directory + "histogram-log.png" ) );
logHistoButton->setToggleButton(true);
TQHBoxLayout* l1 = new TQHBoxLayout();
l1->addWidget(label1);
l1->addWidget(m_channelCB);
l1->addStretch(10);
l1->addWidget(m_scaleBG);
gridSettings->addMultiCellLayout(l1, 0, 0, 0, 4);
// -------------------------------------------------------------
TQVBox *histoBox = new TQVBox(gboxSettings);
m_histogramWidget = new Digikam::HistogramWidget(256, 140, histoBox, false, true, true);
TQWhatsThis::add( m_histogramWidget, i18n("<p>Here you can see the target preview image histogram drawing "
"of the selected image channel. This one is re-computed at any "
"settings changes."));
TQLabel *space = new TQLabel(histoBox);
space->setFixedHeight(1);
m_hGradient = new Digikam::ColorGradientWidget( Digikam::ColorGradientWidget::Horizontal, 10, histoBox );
m_hGradient->setColors( TQColor( "black" ), TQColor( "white" ) );
gridSettings->addMultiCellWidget(histoBox, 1, 2, 0, 4);
// -------------------------------------------------------------
m_HSSelector = new KHSSelector(gboxSettings);
TQWhatsThis::add( m_HSSelector, i18n("<p>Select the hue and saturation adjustments of the image here."));
m_HSSelector->setMinimumSize(256, 142);
gridSettings->addMultiCellWidget(m_HSSelector, 3, 3, 0, 4);
m_HSPreview = new HSPreviewWidget(gboxSettings, spacingHint());
TQWhatsThis::add( m_HSPreview, i18n("<p>You can see here a color preview of the hue and "
"saturation adjustments."));
m_HSPreview->setMinimumSize(256, 15);
gridSettings->addMultiCellWidget(m_HSPreview, 4, 4, 0, 4);
TQLabel *label2 = new TQLabel(i18n("Hue:"), gboxSettings);
m_hInput = new KDoubleNumInput(gboxSettings);
m_hInput->setPrecision(0);
m_hInput->setRange(-180.0, 180.0, 1.0, true);
m_hInput->setValue(0.0);
TQWhatsThis::add( m_hInput, i18n("<p>Set here the hue adjustment of the image."));
gridSettings->addMultiCellWidget(label2, 5, 5, 0, 4);
gridSettings->addMultiCellWidget(m_hInput, 6, 6, 0, 4);
TQLabel *label3 = new TQLabel(i18n("Saturation:"), gboxSettings);
m_sInput = new KDoubleNumInput(gboxSettings);
m_sInput->setPrecision(2);
m_sInput->setRange(-100.0, 100.0, 0.01, true);
m_sInput->setValue(0.0);
TQWhatsThis::add( m_sInput, i18n("<p>Set here the saturation adjustment of the image."));
gridSettings->addMultiCellWidget(label3, 7, 7, 0, 4);
gridSettings->addMultiCellWidget(m_sInput, 8, 8, 0, 4);
TQLabel *label4 = new TQLabel(i18n("Lightness:"), gboxSettings);
m_lInput = new KDoubleNumInput(gboxSettings);
m_lInput->setPrecision(2);
m_lInput->setRange(-100.0, 100.0, 0.01, true);
m_lInput->setValue(0.0);
TQWhatsThis::add( m_lInput, i18n("<p>Set here the lightness adjustment of the image."));
gridSettings->addMultiCellWidget(label4, 9, 9, 0, 4);
gridSettings->addMultiCellWidget(m_lInput, 10, 10, 0, 4);
gridSettings->setRowStretch(11, 10);
setUserAreaWidget(gboxSettings);
// -------------------------------------------------------------
connect(m_HSSelector, TQT_SIGNAL(valueChanged(int, int)),
this, TQT_SLOT(slotHSChanged(int, int)));
connect(m_channelCB, TQT_SIGNAL(activated(int)),
this, TQT_SLOT(slotChannelChanged(int)));
connect(m_scaleBG, TQT_SIGNAL(released(int)),
this, TQT_SLOT(slotScaleChanged(int)));
connect(m_previewWidget, TQT_SIGNAL(spotPositionChangedFromTarget( const Digikam::DColor &, const TQPoint & )),
this, TQT_SLOT(slotColorSelectedFromTarget( const Digikam::DColor & )));
connect(m_hInput, TQT_SIGNAL(valueChanged (double)),
this, TQT_SLOT(slotTimer()));
connect(m_hInput, TQT_SIGNAL(valueChanged (double)),
this, TQT_SLOT(slotHChanged(double)));
connect(m_sInput, TQT_SIGNAL(valueChanged (double)),
this, TQT_SLOT(slotTimer()));
connect(m_sInput, TQT_SIGNAL(valueChanged (double)),
this, TQT_SLOT(slotSChanged(double)));
connect(m_lInput, TQT_SIGNAL(valueChanged (double)),
this, TQT_SLOT(slotTimer()));
connect(m_previewWidget, TQT_SIGNAL(signalResized()),
this, TQT_SLOT(slotEffect()));
// -------------------------------------------------------------
enableButtonOK( false );
}
ImageEffect_HSL::~ImageEffect_HSL()
{
m_histogramWidget->stopHistogramComputation();
if (m_destinationPreviewData)
delete [] m_destinationPreviewData;
delete m_histogramWidget;
delete m_previewWidget;
}
void ImageEffect_HSL::slotChannelChanged(int channel)
{
switch(channel)
{
case LuminosityChannel:
m_histogramWidget->m_channelType = Digikam::HistogramWidget::ValueHistogram;
m_hGradient->setColors( TQColor( "black" ), TQColor( "white" ) );
break;
case RedChannel:
m_histogramWidget->m_channelType = Digikam::HistogramWidget::RedChannelHistogram;
m_hGradient->setColors( TQColor( "black" ), TQColor( "red" ) );
break;
case GreenChannel:
m_histogramWidget->m_channelType = Digikam::HistogramWidget::GreenChannelHistogram;
m_hGradient->setColors( TQColor( "black" ), TQColor( "green" ) );
break;
case BlueChannel:
m_histogramWidget->m_channelType = Digikam::HistogramWidget::BlueChannelHistogram;
m_hGradient->setColors( TQColor( "black" ), TQColor( "blue" ) );
break;
}
m_histogramWidget->repaint(false);
}
void ImageEffect_HSL::slotScaleChanged(int scale)
{
m_histogramWidget->m_scaleType = scale;
m_histogramWidget->repaint(false);
}
void ImageEffect_HSL::slotColorSelectedFromTarget( const Digikam::DColor &color )
{
m_histogramWidget->setHistogramGuideByColor(color);
}
void ImageEffect_HSL::slotHSChanged(int h, int s)
{
double hue = double(h);
if (h >= 180 && h <= 359)
hue = double(h) - 359.0;
double sat = ((double)s * (200.0/255.0)) - 100.0;
m_hInput->blockSignals(true);
m_sInput->blockSignals(true);
m_hInput->setValue(hue);
m_sInput->setValue(sat);
m_hInput->blockSignals(false);
m_sInput->blockSignals(false);
slotTimer();
}
void ImageEffect_HSL::slotHChanged(double h)
{
int hue = int(h);
if (h >= -180 && h < 0)
hue = int(h) + 359;
m_HSSelector->blockSignals(true);
m_HSSelector->setXValue(hue);
m_HSSelector->blockSignals(false);
}
void ImageEffect_HSL::slotSChanged(double s)
{
int sat = (int)((s + 100.0) * (255.0/200.0));
m_HSSelector->blockSignals(true);
m_HSSelector->setYValue(sat);
m_HSSelector->blockSignals(false);
}
void ImageEffect_HSL::readUserSettings()
{
TDEConfig* config = kapp->config();
config->setGroup("hsladjust Tool Dialog");
m_channelCB->setCurrentItem(config->readNumEntry("Histogram Channel", 0)); // Luminosity.
m_scaleBG->setButton(config->readNumEntry("Histogram Scale", Digikam::HistogramWidget::LogScaleHistogram));
m_hInput->setValue(config->readDoubleNumEntry("HueAjustment", 0.0));
m_sInput->setValue(config->readDoubleNumEntry("SaturationAjustment", 0.0));
m_lInput->setValue(config->readDoubleNumEntry("LighnessAjustment", 0.0));
slotHChanged(m_hInput->value());
slotSChanged(m_sInput->value());
slotChannelChanged(m_channelCB->currentItem());
slotScaleChanged(m_scaleBG->selectedId());
}
void ImageEffect_HSL::writeUserSettings()
{
TDEConfig* config = kapp->config();
config->setGroup("hsladjust Tool Dialog");
config->writeEntry("Histogram Channel", m_channelCB->currentItem());
config->writeEntry("Histogram Scale", m_scaleBG->selectedId());
config->writeEntry("HueAjustment", m_hInput->value());
config->writeEntry("SaturationAjustment", m_sInput->value());
config->writeEntry("LighnessAjustment", m_lInput->value());
config->sync();
}
void ImageEffect_HSL::resetValues()
{
m_hInput->blockSignals(true);
m_sInput->blockSignals(true);
m_lInput->blockSignals(true);
m_hInput->setValue(0.0);
m_sInput->setValue(0.0);
m_lInput->setValue(0.0);
slotHChanged(0.0);
slotSChanged(0.0);
m_hInput->blockSignals(false);
m_sInput->blockSignals(false);
m_lInput->blockSignals(false);
}
void ImageEffect_HSL::slotEffect()
{
kapp->setOverrideCursor( KCursor::waitCursor() );
double hu = m_hInput->value();
double sa = m_sInput->value();
double lu = m_lInput->value();
enableButtonOK( hu != 0.0 || sa != 0.0 || lu != 0.0);
m_HSPreview->setHS(hu, sa);
m_histogramWidget->stopHistogramComputation();
if (m_destinationPreviewData)
delete [] m_destinationPreviewData;
Digikam::ImageIface* iface = m_previewWidget->imageIface();
m_destinationPreviewData = iface->getPreviewImage();
int w = iface->previewWidth();
int h = iface->previewHeight();
bool a = iface->previewHasAlpha();
bool sb = iface->previewSixteenBit();
Digikam::DImg preview(w, h, sb, a, m_destinationPreviewData);
Digikam::HSLModifier cmod;
cmod.setHue(hu);
cmod.setSaturation(sa);
cmod.setLightness(lu);
cmod.applyHSL(preview);
iface->putPreviewImage(preview.bits());
m_previewWidget->updatePreview();
// Update histogram.
memcpy(m_destinationPreviewData, preview.bits(), preview.numBytes());
m_histogramWidget->updateData(m_destinationPreviewData, w, h, sb, 0, 0, 0, false);
kapp->restoreOverrideCursor();
}
void ImageEffect_HSL::finalRendering()
{
kapp->setOverrideCursor( KCursor::waitCursor() );
double hu = m_hInput->value();
double sa = m_sInput->value();
double lu = m_lInput->value();
Digikam::ImageIface* iface = m_previewWidget->imageIface();
uchar *data = iface->getOriginalImage();
int w = iface->originalWidth();
int h = iface->originalHeight();
bool a = iface->originalHasAlpha();
bool sb = iface->originalSixteenBit();
Digikam::DImg original(w, h, sb, a, data);
delete [] data;
Digikam::HSLModifier cmod;
cmod.setHue(hu);
cmod.setSaturation(sa);
cmod.setLightness(lu);
cmod.applyHSL(original);
iface->putOriginalImage(i18n("HSL Adjustments"), original.bits());
kapp->restoreOverrideCursor();
accept();
}
} // NameSpace DigikamImagesPluginCore
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