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351 lines
13 KiB
351 lines
13 KiB
/* ============================================================
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*
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* This file is a part of digiKam project
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* http://www.digikam.org
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*
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* Date : 2004-06-05
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* Description : digiKam image editor to adjust Brightness,
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Contrast, and Gamma of picture.
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*
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* Copyright (C) 2004 by Renchi Raju <renchi@pooh.tam.uiuc.edu>
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* Copyright (C) 2005-2007 by Gilles Caulier <caulier dot gilles at gmail dot com>
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*
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* This program is free software; you can redistribute it
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* and/or modify it under the terms of the GNU General
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* Public License as published by the Free Software Foundation;
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* either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* ============================================================ */
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// TQt includes.
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#include <tqcolor.h>
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#include <tqgroupbox.h>
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#include <tqhgroupbox.h>
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#include <tqvgroupbox.h>
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#include <tqhbuttongroup.h>
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#include <tqlabel.h>
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#include <tqvbox.h>
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#include <tqlayout.h>
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#include <tqframe.h>
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#include <tqlabel.h>
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#include <tqpushbutton.h>
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#include <tqcheckbox.h>
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#include <tqcombobox.h>
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#include <tqwhatsthis.h>
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#include <tqtooltip.h>
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// KDE includes.
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#include <knuminput.h>
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#include <klocale.h>
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#include <kapplication.h>
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#include <tdeconfig.h>
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#include <kcursor.h>
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#include <kstandarddirs.h>
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// Digikam includes.
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#include "imageiface.h"
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#include "imagewidget.h"
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#include "histogramwidget.h"
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#include "colorgradientwidget.h"
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#include "bcgmodifier.h"
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#include "dimg.h"
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// Local includes.
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#include "imageeffect_bcg.h"
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#include "imageeffect_bcg.moc"
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namespace DigikamImagesPluginCore
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{
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ImageEffect_BCG::ImageEffect_BCG(TQWidget* parent)
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: Digikam::ImageDlgBase(parent, i18n("Brightness Contrast Gamma Adjustments"),
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"bcgadjust", false)
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{
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m_destinationPreviewData = 0L;
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setHelp("bcgadjusttool.anchor", "digikam");
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m_previewWidget = new Digikam::ImageWidget("bcgadjust Tool Dialog", plainPage(),
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i18n("<p>Here you can see the image "
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"brightness-contrast-gamma adjustments preview. "
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"You can pick color on image "
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"to see the color level corresponding on histogram."));
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setPreviewAreaWidget(m_previewWidget);
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// -------------------------------------------------------------
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TQWidget *gboxSettings = new TQWidget(plainPage());
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TQGridLayout* gridSettings = new TQGridLayout( gboxSettings, 9, 4, spacingHint());
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TQLabel *label1 = new TQLabel(i18n("Channel:"), gboxSettings);
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label1->setAlignment ( TQt::AlignRight | TQt::AlignVCenter );
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m_channelCB = new TQComboBox( false, gboxSettings );
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m_channelCB->insertItem( i18n("Luminosity") );
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m_channelCB->insertItem( i18n("Red") );
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m_channelCB->insertItem( i18n("Green") );
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m_channelCB->insertItem( i18n("Blue") );
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TQWhatsThis::add( m_channelCB, i18n("<p>Select the histogram channel to display here:<p>"
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"<b>Luminosity</b>: display the image's luminosity values.<p>"
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"<b>Red</b>: display the red image-channel values.<p>"
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"<b>Green</b>: display the green image-channel values.<p>"
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"<b>Blue</b>: display the blue image-channel values.<p>"));
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m_scaleBG = new TQHButtonGroup(gboxSettings);
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m_scaleBG->setExclusive(true);
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m_scaleBG->setFrameShape(TQFrame::NoFrame);
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m_scaleBG->setInsideMargin( 0 );
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TQWhatsThis::add( m_scaleBG, i18n("<p>Select the histogram scale here.<p>"
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"If the image's maximal counts are small, you can use the linear scale.<p>"
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"Logarithmic scale can be used when the maximal counts are big; "
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"if it is used, all values (small and large) will be visible on the graph."));
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TQPushButton *linHistoButton = new TQPushButton( m_scaleBG );
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TQToolTip::add( linHistoButton, i18n( "<p>Linear" ) );
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m_scaleBG->insert(linHistoButton, Digikam::HistogramWidget::LinScaleHistogram);
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TDEGlobal::dirs()->addResourceType("histogram-lin", TDEGlobal::dirs()->kde_default("data") + "digikam/data");
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TQString directory = TDEGlobal::dirs()->findResourceDir("histogram-lin", "histogram-lin.png");
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linHistoButton->setPixmap( TQPixmap( directory + "histogram-lin.png" ) );
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linHistoButton->setToggleButton(true);
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TQPushButton *logHistoButton = new TQPushButton( m_scaleBG );
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TQToolTip::add( logHistoButton, i18n( "<p>Logarithmic" ) );
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m_scaleBG->insert(logHistoButton, Digikam::HistogramWidget::LogScaleHistogram);
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TDEGlobal::dirs()->addResourceType("histogram-log", TDEGlobal::dirs()->kde_default("data") + "digikam/data");
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directory = TDEGlobal::dirs()->findResourceDir("histogram-log", "histogram-log.png");
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logHistoButton->setPixmap( TQPixmap( directory + "histogram-log.png" ) );
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logHistoButton->setToggleButton(true);
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TQHBoxLayout* l1 = new TQHBoxLayout();
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l1->addWidget(label1);
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l1->addWidget(m_channelCB);
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l1->addStretch(10);
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l1->addWidget(m_scaleBG);
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gridSettings->addMultiCellLayout(l1, 0, 0, 0, 4);
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// -------------------------------------------------------------
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TQVBox *histoBox = new TQVBox(gboxSettings);
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m_histogramWidget = new Digikam::HistogramWidget(256, 140, histoBox, false, true, true);
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TQWhatsThis::add( m_histogramWidget, i18n("<p>Here you can see the target preview image histogram drawing "
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"of the selected image channel. This one is re-computed at any "
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"settings changes."));
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TQLabel *space = new TQLabel(histoBox);
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space->setFixedHeight(1);
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m_hGradient = new Digikam::ColorGradientWidget( Digikam::ColorGradientWidget::Horizontal, 10, histoBox );
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m_hGradient->setColors( TQColor( "black" ), TQColor( "white" ) );
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gridSettings->addMultiCellWidget(histoBox, 1, 2, 0, 4);
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// -------------------------------------------------------------
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TQLabel *label2 = new TQLabel(i18n("Brightness:"), gboxSettings);
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m_bInput = new KIntNumInput(gboxSettings);
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m_bInput->setRange(-100, 100, 1, true);
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m_bInput->setValue(0);
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TQWhatsThis::add( m_bInput, i18n("<p>Set here the brightness adjustment of the image."));
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gridSettings->addMultiCellWidget(label2, 3, 3, 0, 4);
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gridSettings->addMultiCellWidget(m_bInput, 4, 4, 0, 4);
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TQLabel *label3 = new TQLabel(i18n("Contrast:"), gboxSettings);
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m_cInput = new KIntNumInput(gboxSettings);
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m_cInput->setRange(-100, 100, 1, true);
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m_cInput->setValue(0);
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TQWhatsThis::add( m_cInput, i18n("<p>Set here the contrast adjustment of the image."));
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gridSettings->addMultiCellWidget(label3, 5, 5, 0, 4);
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gridSettings->addMultiCellWidget(m_cInput, 6, 6, 0, 4);
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TQLabel *label4 = new TQLabel(i18n("Gamma:"), gboxSettings);
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m_gInput = new KDoubleNumInput(gboxSettings);
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m_gInput->setPrecision(2);
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m_gInput->setRange(0.1, 3.0, 0.01, true);
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m_gInput->setValue(1.0);
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TQWhatsThis::add( m_gInput, i18n("<p>Set here the gamma adjustment of the image."));
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gridSettings->addMultiCellWidget(label4, 7, 7, 0, 4);
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gridSettings->addMultiCellWidget(m_gInput, 8, 8, 0, 4);
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gridSettings->setRowStretch(9, 10);
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setUserAreaWidget(gboxSettings);
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// -------------------------------------------------------------
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connect(m_channelCB, TQT_SIGNAL(activated(int)),
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this, TQT_SLOT(slotChannelChanged(int)));
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connect(m_scaleBG, TQT_SIGNAL(released(int)),
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this, TQT_SLOT(slotScaleChanged(int)));
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connect(m_previewWidget, TQT_SIGNAL(spotPositionChangedFromTarget( const Digikam::DColor &, const TQPoint & )),
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this, TQT_SLOT(slotColorSelectedFromTarget( const Digikam::DColor & )));
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connect(m_bInput, TQT_SIGNAL(valueChanged(int)),
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this, TQT_SLOT(slotTimer()));
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connect(m_cInput, TQT_SIGNAL(valueChanged(int)),
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this, TQT_SLOT(slotTimer()));
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connect(m_gInput, TQT_SIGNAL(valueChanged(double)),
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this, TQT_SLOT(slotTimer()));
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connect(m_previewWidget, TQT_SIGNAL(signalResized()),
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this, TQT_SLOT(slotEffect()));
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// -------------------------------------------------------------
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enableButtonOK( false );
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}
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ImageEffect_BCG::~ImageEffect_BCG()
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{
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m_histogramWidget->stopHistogramComputation();
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if (m_destinationPreviewData)
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delete [] m_destinationPreviewData;
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delete m_histogramWidget;
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delete m_previewWidget;
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}
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void ImageEffect_BCG::slotChannelChanged(int channel)
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{
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switch(channel)
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{
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case LuminosityChannel:
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m_histogramWidget->m_channelType = Digikam::HistogramWidget::ValueHistogram;
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m_hGradient->setColors( TQColor( "black" ), TQColor( "white" ) );
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break;
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case RedChannel:
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m_histogramWidget->m_channelType = Digikam::HistogramWidget::RedChannelHistogram;
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m_hGradient->setColors( TQColor( "black" ), TQColor( "red" ) );
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break;
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case GreenChannel:
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m_histogramWidget->m_channelType = Digikam::HistogramWidget::GreenChannelHistogram;
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m_hGradient->setColors( TQColor( "black" ), TQColor( "green" ) );
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break;
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case BlueChannel:
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m_histogramWidget->m_channelType = Digikam::HistogramWidget::BlueChannelHistogram;
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m_hGradient->setColors( TQColor( "black" ), TQColor( "blue" ) );
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break;
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}
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m_histogramWidget->repaint(false);
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}
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void ImageEffect_BCG::slotScaleChanged(int scale)
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{
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m_histogramWidget->m_scaleType = scale;
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m_histogramWidget->repaint(false);
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}
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void ImageEffect_BCG::slotColorSelectedFromTarget( const Digikam::DColor &color )
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{
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m_histogramWidget->setHistogramGuideByColor(color);
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}
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void ImageEffect_BCG::readUserSettings()
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{
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TDEConfig* config = kapp->config();
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config->setGroup("bcgadjust Tool Dialog");
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m_channelCB->setCurrentItem(config->readNumEntry("Histogram Channel", 0)); // Luminosity.
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m_scaleBG->setButton(config->readNumEntry("Histogram Scale", Digikam::HistogramWidget::LogScaleHistogram));
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m_bInput->setValue(config->readNumEntry("BrightnessAjustment", 0));
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m_cInput->setValue(config->readNumEntry("ContrastAjustment", 0));
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m_gInput->setValue(config->readDoubleNumEntry("GammaAjustment", 1.0));
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slotChannelChanged(m_channelCB->currentItem());
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slotScaleChanged(m_scaleBG->selectedId());
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}
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void ImageEffect_BCG::writeUserSettings()
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{
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TDEConfig* config = kapp->config();
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config->setGroup("bcgadjust Tool Dialog");
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config->writeEntry("Histogram Channel", m_channelCB->currentItem());
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config->writeEntry("Histogram Scale", m_scaleBG->selectedId());
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config->writeEntry("BrightnessAjustment", m_bInput->value());
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config->writeEntry("ContrastAjustment", m_cInput->value());
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config->writeEntry("GammaAjustment", m_gInput->value());
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config->sync();
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}
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void ImageEffect_BCG::resetValues()
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{
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m_bInput->blockSignals(true);
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m_cInput->blockSignals(true);
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m_gInput->blockSignals(true);
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m_bInput->setValue(0);
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m_cInput->setValue(0);
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m_gInput->setValue(1.0);
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m_bInput->blockSignals(false);
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m_cInput->blockSignals(false);
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m_gInput->blockSignals(false);
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}
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void ImageEffect_BCG::slotEffect()
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{
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kapp->setOverrideCursor( KCursor::waitCursor() );
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double b = (double)m_bInput->value()/250.0;
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double c = (double)(m_cInput->value()/100.0) + 1.00;
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double g = m_gInput->value();
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enableButtonOK( b != 0.0 || c != 1.0 || g != 1.0 );
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m_histogramWidget->stopHistogramComputation();
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if (m_destinationPreviewData)
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delete [] m_destinationPreviewData;
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Digikam::ImageIface* iface = m_previewWidget->imageIface();
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m_destinationPreviewData = iface->getPreviewImage();
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int w = iface->previewWidth();
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int h = iface->previewHeight();
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bool a = iface->previewHasAlpha();
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bool sb = iface->previewSixteenBit();
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Digikam::DImg preview(w, h, sb, a, m_destinationPreviewData);
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Digikam::BCGModifier cmod;
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cmod.setGamma(g);
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cmod.setBrightness(b);
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cmod.setContrast(c);
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cmod.applyBCG(preview);
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iface->putPreviewImage(preview.bits());
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m_previewWidget->updatePreview();
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// Update histogram.
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memcpy(m_destinationPreviewData, preview.bits(), preview.numBytes());
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m_histogramWidget->updateData(m_destinationPreviewData, w, h, sb, 0, 0, 0, false);
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kapp->restoreOverrideCursor();
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}
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void ImageEffect_BCG::finalRendering()
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{
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kapp->setOverrideCursor( KCursor::waitCursor() );
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Digikam::ImageIface* iface = m_previewWidget->imageIface();
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double b = (double)m_bInput->value()/250.0;
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double c = (double)(m_cInput->value()/100.0) + 1.00;
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double g = m_gInput->value();
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iface->setOriginalBCG(b, c, g);
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kapp->restoreOverrideCursor();
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accept();
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}
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} // NameSpace DigikamImagesPluginCore
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