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432 lines
17 KiB
432 lines
17 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 : 2005-05-31
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* Description : Auto-Color correction tool.
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*
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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 <tqradiobutton.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 <tqlayout.h>
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#include <tqframe.h>
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#include <tqtimer.h>
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#include <tqvbox.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 <tqlistbox.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 <kcursor.h>
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#include <kstandarddirs.h>
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#include <tdeconfig.h>
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#include <klocale.h>
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#include <kapplication.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 "dimgimagefilters.h"
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#include "whitebalance.h"
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#include "dimg.h"
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#include "listboxpreviewitem.h"
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// Local includes.
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#include "imageeffect_autocorrection.h"
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#include "imageeffect_autocorrection.moc"
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namespace DigikamImagesPluginCore
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{
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ImageEffect_AutoCorrection::ImageEffect_AutoCorrection(TQWidget* parent)
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: Digikam::ImageDlgBase(parent, i18n("Auto Color Correction"),
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"autocorrection", false), m_destinationPreviewData(0L)
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{
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setHelp("autocolorcorrectiontool.anchor", "digikam");
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// -------------------------------------------------------------
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m_previewWidget = new Digikam::ImageWidget("autocorrection Tool Dialog", plainPage(),
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i18n("<p>Here you can see the auto-color correction tool "
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"preview. 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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Digikam::ImageIface iface(0, 0);
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m_thumbnailImage = iface.getOriginalImg()->smoothScale(128, 128, TQSize::ScaleMin);
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TQWidget *gboxSettings = new TQWidget(plainPage());
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TQGridLayout* gridSettings = new TQGridLayout( gboxSettings, 4, 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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m_correctionTools = new TQListBox(gboxSettings);
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m_correctionTools->setColumnMode(1);
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m_correctionTools->setVariableWidth(false);
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m_correctionTools->setVariableHeight(false);
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Digikam::ListBoxWhatsThis* whatsThis = new Digikam::ListBoxWhatsThis(m_correctionTools);
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TQPixmap pix = getThumbnailForEffect(AutoLevelsCorrection);
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Digikam::ListBoxPreviewItem *item = new Digikam::ListBoxPreviewItem(pix, i18n("Auto Levels"));
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whatsThis->add( item, i18n("<b>Auto Levels</b>:"
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"<p>This option maximizes the tonal range in the Red, "
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"Green, and Blue channels. It searches the image shadow and highlight "
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"limit values and adjusts the Red, Green, and Blue channels "
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"to a full histogram range.</p>"));
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m_correctionTools->insertItem(item, AutoLevelsCorrection);
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pix = getThumbnailForEffect(NormalizeCorrection);
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item = new Digikam::ListBoxPreviewItem(pix, i18n("Normalize"));
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whatsThis->add( item, i18n("<b>Normalize</b>:"
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"<p>This option scales brightness values across the active "
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"image so that the darkest point becomes black, and the "
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"brightest point becomes as bright as possible without "
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"altering its hue. This is often a \"magic fix\" for "
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"images that are dim or washed out.</p>"));
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m_correctionTools->insertItem(item, NormalizeCorrection);
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pix = getThumbnailForEffect(EqualizeCorrection);
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item = new Digikam::ListBoxPreviewItem(pix, i18n("Equalize"));
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whatsThis->add( item, i18n("<b>Equalize</b>:"
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"<p>This option adjusts the brightness of colors across the "
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"active image so that the histogram for the value channel "
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"is as nearly as possible flat, that is, so that each possible "
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"brightness value appears at about the same number of pixels "
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"as each other value. Sometimes Equalize works wonderfully at "
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"enhancing the contrasts in an image. Other times it gives "
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"garbage. It is a very powerful operation, which can either work "
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"miracles on an image or destroy it.</p>"));
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m_correctionTools->insertItem(item, EqualizeCorrection);
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pix = getThumbnailForEffect(StretchContrastCorrection);
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item = new Digikam::ListBoxPreviewItem(pix, i18n("Stretch Contrast"));
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whatsThis->add( item, i18n("<b>Stretch Contrast</b>:"
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"<p>This option enhances the contrast and brightness "
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"of the RGB values of an image by stretching the lowest "
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"and highest values to their fullest range, adjusting "
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"everything in between.</p>"));
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m_correctionTools->insertItem(item, StretchContrastCorrection);
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pix = getThumbnailForEffect(AutoExposureCorrection);
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item = new Digikam::ListBoxPreviewItem(pix, i18n("Auto Exposure"));
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whatsThis->add( item, i18n("<b>Auto Exposure</b>:"
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"<p>This option enhances the contrast and brightness "
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"of the RGB values of an image to calculate optimal "
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"exposition and black level using image histogram "
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"properties.</p>"));
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m_correctionTools->insertItem(item, AutoExposureCorrection);
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// -------------------------------------------------------------
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m_correctionTools->setFocus();
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gridSettings->addMultiCellWidget(m_correctionTools, 3, 3, 0, 4);
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gridSettings->setRowStretch(3, 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_correctionTools, TQT_SIGNAL(highlighted(int)),
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this, TQT_SLOT(slotEffect()));
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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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ImageEffect_AutoCorrection::~ImageEffect_AutoCorrection()
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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_AutoCorrection::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_AutoCorrection::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_AutoCorrection::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_AutoCorrection::readUserSettings()
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{
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TDEConfig* config = kapp->config();
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config->setGroup("autocorrection 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_correctionTools->setCurrentItem(config->readNumEntry("Auto Correction Filter", AutoLevelsCorrection));
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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_AutoCorrection::writeUserSettings()
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{
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TDEConfig* config = kapp->config();
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config->setGroup("autocorrection 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("Auto Correction Filter", m_correctionTools->currentItem());
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config->sync();
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}
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void ImageEffect_AutoCorrection::resetValues()
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{
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m_correctionTools->blockSignals(true);
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m_correctionTools->setCurrentItem(AutoLevelsCorrection);
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m_correctionTools->blockSignals(false);
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}
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void ImageEffect_AutoCorrection::slotEffect()
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{
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kapp->setOverrideCursor( KCursor::waitCursor() );
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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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uchar *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 sb = iface->previewSixteenBit();
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autoCorrection(m_destinationPreviewData, w, h, sb, m_correctionTools->currentItem());
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iface->putPreviewImage(m_destinationPreviewData);
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m_previewWidget->updatePreview();
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// Update histogram.
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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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TQPixmap ImageEffect_AutoCorrection::getThumbnailForEffect(AutoCorrectionType type)
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{
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Digikam::DImg thumb = m_thumbnailImage.copy();
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autoCorrection(thumb.bits(), thumb.width(), thumb.height(), thumb.sixteenBit(), type);
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return (thumb.convertToPixmap());
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}
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void ImageEffect_AutoCorrection::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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uchar *data = iface->getOriginalImage();
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int w = iface->originalWidth();
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int h = iface->originalHeight();
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bool sb = iface->originalSixteenBit();
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if (data)
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{
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int type = m_correctionTools->currentItem();
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autoCorrection(data, w, h, sb, type);
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TQString name;
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switch (type)
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{
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case AutoLevelsCorrection:
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name = i18n("Auto Levels");
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break;
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case NormalizeCorrection:
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name = i18n("Normalize");
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break;
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case EqualizeCorrection:
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name = i18n("Equalize");
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break;
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case StretchContrastCorrection:
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name = i18n("Stretch Contrast");
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break;
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case AutoExposureCorrection:
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name = i18n("Auto Exposure");
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break;
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}
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iface->putOriginalImage(name, data);
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delete [] data;
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}
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kapp->restoreOverrideCursor();
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accept();
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}
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void ImageEffect_AutoCorrection::autoCorrection(uchar *data, int w, int h, bool sb, int type)
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{
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Digikam::DImgImageFilters filter;
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switch (type)
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{
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case AutoLevelsCorrection:
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filter.autoLevelsCorrectionImage(data, w, h, sb);
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break;
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case NormalizeCorrection:
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filter.normalizeImage(data, w, h, sb);
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break;
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case EqualizeCorrection:
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filter.equalizeImage(data, w, h, sb);
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break;
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case StretchContrastCorrection:
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filter.stretchContrastImage(data, w, h, sb);
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break;
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case AutoExposureCorrection:
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Digikam::WhiteBalance wbFilter(sb);
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double blackLevel;
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double exposureLevel;
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wbFilter.autoExposureAdjustement(data, w, h, sb, blackLevel, exposureLevel);
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wbFilter.whiteBalance(data, w, h, sb, blackLevel, exposureLevel);
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break;
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}
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}
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} // NameSpace DigikamImagesPluginCore
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