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Diffstat (limited to 'src/imageplugins/coreplugin/autocorrectiontool.cpp')
| -rw-r--r-- | src/imageplugins/coreplugin/autocorrectiontool.cpp | 438 |
1 files changed, 438 insertions, 0 deletions
diff --git a/src/imageplugins/coreplugin/autocorrectiontool.cpp b/src/imageplugins/coreplugin/autocorrectiontool.cpp new file mode 100644 index 00000000..32f00b44 --- /dev/null +++ b/src/imageplugins/coreplugin/autocorrectiontool.cpp @@ -0,0 +1,438 @@ +/* ============================================================ + * + * This file is a part of digiKam project + * http://www.digikam.org + * + * Date : 2005-05-31 + * Description : Auto-Color correction tool. + * + * Copyright (C) 2005-2008 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 <tqcheckbox.h> +#include <tqcolor.h> +#include <tqcombobox.h> +#include <tqframe.h> +#include <tqgroupbox.h> +#include <tqhbuttongroup.h> +#include <tqhgroupbox.h> +#include <tqlabel.h> +#include <tqlayout.h> +#include <tqlistbox.h> +#include <tqpushbutton.h> +#include <tqradiobutton.h> +#include <tqtimer.h> +#include <tqtooltip.h> +#include <tqvbox.h> +#include <tqvgroupbox.h> +#include <tqwhatsthis.h> + +// KDE includes. + +#include <tdeapplication.h> +#include <tdeconfig.h> +#include <kcursor.h> +#include <kiconloader.h> +#include <tdelocale.h> +#include <kstandarddirs.h> + +// Digikam includes. + +#include "colorgradientwidget.h" +#include "dimg.h" +#include "dimgimagefilters.h" +#include "editortoolsettings.h" +#include "histogramwidget.h" +#include "imageiface.h" +#include "imagewidget.h" +#include "listboxpreviewitem.h" +#include "whitebalance.h" + +// Local includes. + +#include "autocorrectiontool.h" +#include "autocorrectiontool.moc" + +using namespace Digikam; + +namespace DigikamImagesPluginCore +{ + +AutoCorrectionTool::AutoCorrectionTool(TQObject* parent) + : EditorTool(parent) +{ + setName("autocorrection"); + setToolName(i18n("Auto-Correction")); + setToolIcon(SmallIcon("autocorrection")); + setToolHelp("autocolorcorrectiontool.anchor"); + + // ------------------------------------------------------------- + + m_previewWidget = new ImageWidget("autocorrection Tool", 0, + i18n("<p>Here you can see the auto-color correction tool " + "preview. You can pick color on image " + "to see the color level corresponding on histogram.")); + setToolView(m_previewWidget); + + // ------------------------------------------------------------- + + ImageIface iface(0, 0); + m_thumbnailImage = iface.getOriginalImg()->smoothScale(128, 128, TQSize::ScaleMin); + m_destinationPreviewData = 0; + + EditorToolSettings *gboxSettings = new EditorToolSettings(EditorToolSettings::Default| + EditorToolSettings::Ok| + EditorToolSettings::Cancel); + + TQGridLayout* gridSettings = new TQGridLayout(gboxSettings->plainPage(), 2, 4); + + TQLabel *label1 = new TQLabel(i18n("Channel:"), gboxSettings->plainPage()); + label1->setAlignment ( TQt::AlignRight | TQt::AlignVCenter ); + m_channelCB = new TQComboBox( false, gboxSettings->plainPage() ); + 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->plainPage()); + 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, 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, 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); + + // ------------------------------------------------------------- + + TQVBox *histoBox = new TQVBox(gboxSettings->plainPage()); + m_histogramWidget = new 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 ColorGradientWidget(ColorGradientWidget::Horizontal, 10, histoBox); + m_hGradient->setColors(TQColor("black"), TQColor("white")); + + // ------------------------------------------------------------- + + m_correctionTools = new TQListBox(gboxSettings->plainPage()); + m_correctionTools->setColumnMode(1); + m_correctionTools->setVariableWidth(false); + m_correctionTools->setVariableHeight(false); + ListBoxWhatsThis* whatsThis = new ListBoxWhatsThis(m_correctionTools); + + TQPixmap pix = getThumbnailForEffect(AutoLevelsCorrection); + ListBoxPreviewItem *item = new ListBoxPreviewItem(pix, i18n("Auto Levels")); + whatsThis->add( item, i18n("<b>Auto Levels</b>:" + "<p>This option maximizes the tonal range in the Red, " + "Green, and Blue channels. It searches the image shadow and highlight " + "limit values and adjusts the Red, Green, and Blue channels " + "to a full histogram range.</p>")); + m_correctionTools->insertItem(item, AutoLevelsCorrection); + + pix = getThumbnailForEffect(NormalizeCorrection); + item = new ListBoxPreviewItem(pix, i18n("Normalize")); + whatsThis->add( item, i18n("<b>Normalize</b>:" + "<p>This option scales brightness values across the active " + "image so that the darkest point becomes black, and the " + "brightest point becomes as bright as possible without " + "altering its hue. This is often a \"magic fix\" for " + "images that are dim or washed out.</p>")); + m_correctionTools->insertItem(item, NormalizeCorrection); + + pix = getThumbnailForEffect(EqualizeCorrection); + item = new ListBoxPreviewItem(pix, i18n("Equalize")); + whatsThis->add( item, i18n("<b>Equalize</b>:" + "<p>This option adjusts the brightness of colors across the " + "active image so that the histogram for the value channel " + "is as nearly as possible flat, that is, so that each possible " + "brightness value appears at about the same number of pixels " + "as each other value. Sometimes Equalize works wonderfully at " + "enhancing the contrasts in an image. Other times it gives " + "garbage. It is a very powerful operation, which can either work " + "miracles on an image or destroy it.</p>")); + m_correctionTools->insertItem(item, EqualizeCorrection); + + pix = getThumbnailForEffect(StretchContrastCorrection); + item = new ListBoxPreviewItem(pix, i18n("Stretch Contrast")); + whatsThis->add( item, i18n("<b>Stretch Contrast</b>:" + "<p>This option enhances the contrast and brightness " + "of the RGB values of an image by stretching the lowest " + "and highest values to their fullest range, adjusting " + "everything in between.</p>")); + m_correctionTools->insertItem(item, StretchContrastCorrection); + + pix = getThumbnailForEffect(AutoExposureCorrection); + item = new ListBoxPreviewItem(pix, i18n("Auto Exposure")); + whatsThis->add( item, i18n("<b>Auto Exposure</b>:" + "<p>This option enhances the contrast and brightness " + "of the RGB values of an image to calculate optimal " + "exposition and black level using image histogram " + "properties.</p>")); + m_correctionTools->insertItem(item, AutoExposureCorrection); + + // ------------------------------------------------------------- + + m_correctionTools->setFocus(); + gridSettings->addMultiCellLayout(l1, 0, 0, 0, 4); + gridSettings->addMultiCellWidget(histoBox, 1, 1, 0, 4); + gridSettings->addMultiCellWidget(m_correctionTools, 2, 2, 0, 4); + gridSettings->setRowStretch(2, 10); + gridSettings->setSpacing(gboxSettings->spacingHint()); + gridSettings->setMargin(gboxSettings->spacingHint()); + + setToolSettings(gboxSettings); + init(); + + // ------------------------------------------------------------- + + connect(m_channelCB, TQ_SIGNAL(activated(int)), + this, TQ_SLOT(slotChannelChanged(int))); + + connect(m_scaleBG, TQ_SIGNAL(released(int)), + this, TQ_SLOT(slotScaleChanged(int))); + + connect(m_previewWidget, TQ_SIGNAL(spotPositionChangedFromTarget(const DColor&, const TQPoint&)), + this, TQ_SLOT(slotColorSelectedFromTarget(const DColor&))); + + connect(m_correctionTools, TQ_SIGNAL(highlighted(int)), + this, TQ_SLOT(slotEffect())); + + connect(m_previewWidget, TQ_SIGNAL(signalResized()), + this, TQ_SLOT(slotEffect())); +} + +AutoCorrectionTool::~AutoCorrectionTool() +{ + if (m_destinationPreviewData) + delete [] m_destinationPreviewData; +} + +void AutoCorrectionTool::slotChannelChanged(int channel) +{ + switch(channel) + { + case LuminosityChannel: + m_histogramWidget->m_channelType = HistogramWidget::ValueHistogram; + m_hGradient->setColors( TQColor( "black" ), TQColor( "white" ) ); + break; + + case RedChannel: + m_histogramWidget->m_channelType = HistogramWidget::RedChannelHistogram; + m_hGradient->setColors( TQColor( "black" ), TQColor( "red" ) ); + break; + + case GreenChannel: + m_histogramWidget->m_channelType = HistogramWidget::GreenChannelHistogram; + m_hGradient->setColors( TQColor( "black" ), TQColor( "green" ) ); + break; + + case BlueChannel: + m_histogramWidget->m_channelType = HistogramWidget::BlueChannelHistogram; + m_hGradient->setColors( TQColor( "black" ), TQColor( "blue" ) ); + break; + } + + m_histogramWidget->repaint(false); +} + +void AutoCorrectionTool::slotScaleChanged(int scale) +{ + m_histogramWidget->m_scaleType = scale; + m_histogramWidget->repaint(false); +} + +void AutoCorrectionTool::slotColorSelectedFromTarget(const DColor& color) +{ + m_histogramWidget->setHistogramGuideByColor(color); +} + +void AutoCorrectionTool::readSettings() +{ + TDEConfig* config = kapp->config(); + config->setGroup("autocorrection Tool"); + m_channelCB->setCurrentItem(config->readNumEntry("Histogram Channel", 0)); // Luminosity. + m_scaleBG->setButton(config->readNumEntry("Histogram Scale", HistogramWidget::LogScaleHistogram)); + m_correctionTools->setCurrentItem(config->readNumEntry("Auto Correction Filter", AutoLevelsCorrection)); + m_histogramWidget->reset(); + slotChannelChanged(m_channelCB->currentItem()); + slotScaleChanged(m_scaleBG->selectedId()); +} + +void AutoCorrectionTool::writeSettings() +{ + TDEConfig* config = kapp->config(); + config->setGroup("autocorrection Tool"); + config->writeEntry("Histogram Channel", m_channelCB->currentItem()); + config->writeEntry("Histogram Scale", m_scaleBG->selectedId()); + config->writeEntry("Auto Correction Filter", m_correctionTools->currentItem()); + m_previewWidget->writeSettings(); + config->sync(); +} + +void AutoCorrectionTool::slotResetSettings() +{ + m_correctionTools->blockSignals(true); + m_correctionTools->setCurrentItem(AutoLevelsCorrection); + m_correctionTools->blockSignals(false); + + slotEffect(); +} + +void AutoCorrectionTool::slotEffect() +{ + kapp->setOverrideCursor(KCursor::waitCursor()); + + m_histogramWidget->stopHistogramComputation(); + + if (m_destinationPreviewData) + delete [] m_destinationPreviewData; + + ImageIface* iface = m_previewWidget->imageIface(); + m_destinationPreviewData = iface->getPreviewImage(); + int w = iface->previewWidth(); + int h = iface->previewHeight(); + bool sb = iface->previewSixteenBit(); + + autoCorrection(m_destinationPreviewData, w, h, sb, m_correctionTools->currentItem()); + + iface->putPreviewImage(m_destinationPreviewData); + m_previewWidget->updatePreview(); + + // Update histogram. + + m_histogramWidget->updateData(m_destinationPreviewData, w, h, sb, 0, 0, 0, false); + + kapp->restoreOverrideCursor(); +} + +TQPixmap AutoCorrectionTool::getThumbnailForEffect(AutoCorrectionType type) +{ + DImg thumb = m_thumbnailImage.copy(); + autoCorrection(thumb.bits(), thumb.width(), thumb.height(), thumb.sixteenBit(), type); + return (thumb.convertToPixmap()); +} + + +void AutoCorrectionTool::finalRendering() +{ + kapp->setOverrideCursor( KCursor::waitCursor() ); + ImageIface* iface = m_previewWidget->imageIface(); + uchar *data = iface->getOriginalImage(); + int w = iface->originalWidth(); + int h = iface->originalHeight(); + bool sb = iface->originalSixteenBit(); + + if (data) + { + int type = m_correctionTools->currentItem(); + autoCorrection(data, w, h, sb, type); + TQString name; + + switch (type) + { + case AutoLevelsCorrection: + name = i18n("Auto Levels"); + break; + + case NormalizeCorrection: + name = i18n("Normalize"); + break; + + case EqualizeCorrection: + name = i18n("Equalize"); + break; + + case StretchContrastCorrection: + name = i18n("Stretch Contrast"); + break; + + case AutoExposureCorrection: + name = i18n("Auto Exposure"); + break; + } + + iface->putOriginalImage(name, data); + delete [] data; + } + + kapp->restoreOverrideCursor(); +} + +void AutoCorrectionTool::autoCorrection(uchar *data, int w, int h, bool sb, int type) +{ + DImgImageFilters filter; + + switch (type) + { + case AutoLevelsCorrection: + filter.autoLevelsCorrectionImage(data, w, h, sb); + break; + + case NormalizeCorrection: + filter.normalizeImage(data, w, h, sb); + break; + + case EqualizeCorrection: + filter.equalizeImage(data, w, h, sb); + break; + + case StretchContrastCorrection: + filter.stretchContrastImage(data, w, h, sb); + break; + + case AutoExposureCorrection: + WhiteBalance wbFilter(sb); + double blackLevel; + double exposureLevel; + wbFilter.autoExposureAdjustement(data, w, h, sb, blackLevel, exposureLevel); + wbFilter.whiteBalance(data, w, h, sb, blackLevel, exposureLevel); + break; + } +} + +} // NameSpace DigikamImagesPluginCore + |