/* ============================================================
 *
 * This file is a part of digiKam project
 * http://www.digikam.org
 *
 * Date        : 2004-12-25
 * Description : a digiKam image plugin to reduce
 *               vignetting on an image.
 *
 * Copyright (C) 2004-2008 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 <tqlabel.h>
#include <tqwhatsthis.h>
#include <tqlayout.h>
#include <tqimage.h>
#include <tqpixmap.h>
#include <tqpainter.h>
#include <tqpen.h>
#include <tqtabwidget.h>

// KDE includes.

#include <tdeconfig.h>
#include <klocale.h>
#include <kaboutdata.h>
#include <kiconloader.h>
#include <kapplication.h>
#include <kstandarddirs.h>
#include <kseparator.h>

// LibKDcraw includes.

#include <libkdcraw/rnuminput.h>

// Local includes.

#include "daboutdata.h"
#include "ddebug.h"
#include "bcgmodifier.h"
#include "imageiface.h"
#include "imagewidget.h"
#include "editortoolsettings.h"
#include "dimgimagefilters.h"
#include "antivignetting.h"
#include "antivignettingtool.h"
#include "antivignettingtool.moc"

using namespace KDcrawIface;
using namespace Digikam;

namespace DigikamAntiVignettingImagesPlugin
{

AntiVignettingTool::AntiVignettingTool(TQObject* parent)
                  : EditorToolThreaded(parent)
{
    setName("antivignettings");
    setToolName(i18n("Vignetting Correction"));
    setToolIcon(SmallIcon("antivignetting"));

    m_previewWidget = new ImageWidget("antivignetting Tool", 0, TQString(),
                                      false, ImageGuideWidget::HVGuideMode, false);

    setToolView(m_previewWidget);

    // -------------------------------------------------------------

    m_gboxSettings = new EditorToolSettings(EditorToolSettings::Default|
                                            EditorToolSettings::Ok|
                                            EditorToolSettings::Cancel);
    TQGridLayout* grid = new TQGridLayout(m_gboxSettings->plainPage(), 14, 2);

    m_maskPreviewLabel = new TQLabel( m_gboxSettings->plainPage() );
    m_maskPreviewLabel->setAlignment ( TQt::AlignHCenter | TQt::AlignVCenter );
    TQWhatsThis::add( m_maskPreviewLabel, i18n("<p>You can see here a thumbnail preview of the anti-vignetting "
                                              "mask applied to the image.") );

    // -------------------------------------------------------------

    TQLabel *label1 = new TQLabel(i18n("Density:"), m_gboxSettings->plainPage());

    m_densityInput = new RDoubleNumInput(m_gboxSettings->plainPage());
    m_densityInput->setPrecision(1);
    m_densityInput->setRange(1.0, 20.0, 0.1);
    m_densityInput->setDefaultValue(2.0);
    TQWhatsThis::add( m_densityInput, i18n("<p>This value controls the degree of intensity attenuation by the filter "
                                          "at its point of maximum density."));

    // -------------------------------------------------------------

    TQLabel *label2 = new TQLabel(i18n("Power:"), m_gboxSettings->plainPage());

    m_powerInput = new RDoubleNumInput(m_gboxSettings->plainPage());
    m_powerInput->setPrecision(1);
    m_powerInput->setRange(0.1, 2.0, 0.1);
    m_powerInput->setDefaultValue(1.0);
    TQWhatsThis::add( m_powerInput, i18n("<p>This value is used as the exponent controlling the fall-off in density "
                                        "from the center of the filter to the periphery."));

    // -------------------------------------------------------------

    TQLabel *label3 = new TQLabel(i18n("Radius:"), m_gboxSettings->plainPage());

    m_radiusInput = new RDoubleNumInput(m_gboxSettings->plainPage());
    m_radiusInput->setPrecision(1);
    m_radiusInput->setRange(-100.0, 100.0, 0.1);
    m_radiusInput->setDefaultValue(1.0);
    TQWhatsThis::add( m_radiusInput, i18n("<p>This value is the radius of the center filter. It is a multiple of the "
                                          "half-diagonal measure of the image, at which the density of the filter falls "
                                          "to zero."));

    KSeparator *line = new KSeparator(Horizontal, m_gboxSettings->plainPage());

    // -------------------------------------------------------------

    TQLabel *label4 = new TQLabel(i18n("Brightness:"), m_gboxSettings->plainPage());

    m_brightnessInput = new RIntNumInput(m_gboxSettings->plainPage());
    m_brightnessInput->setRange(0, 100, 1);
    m_brightnessInput->setDefaultValue(0);
    TQWhatsThis::add( m_brightnessInput, i18n("<p>Set here the brightness re-adjustment of the target image."));

    // -------------------------------------------------------------

    TQLabel *label5 = new TQLabel(i18n("Contrast:"), m_gboxSettings->plainPage());

    m_contrastInput = new RIntNumInput(m_gboxSettings->plainPage());
    m_contrastInput->setRange(0, 100, 1);
    m_contrastInput->setDefaultValue(0);
    TQWhatsThis::add( m_contrastInput, i18n("<p>Set here the contrast re-adjustment of the target image."));

    // -------------------------------------------------------------

    TQLabel *label6 = new TQLabel(i18n("Gamma:"), m_gboxSettings->plainPage());

    m_gammaInput = new RDoubleNumInput(m_gboxSettings->plainPage());
    m_gammaInput->setPrecision(2);
    m_gammaInput->setRange(0.1, 3.0, 0.01);
    m_gammaInput->setDefaultValue(1.0);
    TQWhatsThis::add( m_gammaInput, i18n("<p>Set here the gamma re-adjustment of the target image."));

    grid->addMultiCellWidget(m_maskPreviewLabel, 0, 0, 0, 2);
    grid->addMultiCellWidget(label1,             1, 1, 0, 2);
    grid->addMultiCellWidget(m_densityInput,     2, 2, 0, 2);
    grid->addMultiCellWidget(label2,             3, 3, 0, 2);
    grid->addMultiCellWidget(m_powerInput,       4, 4, 0, 2);
    grid->addMultiCellWidget(label3,             5, 5, 0, 2);
    grid->addMultiCellWidget(m_radiusInput,      6, 6, 0, 2);
    grid->addMultiCellWidget(line,               7, 7, 0, 2);
    grid->addMultiCellWidget(label4,             8, 8, 0, 2);
    grid->addMultiCellWidget(m_brightnessInput,  9, 9, 0, 2);
    grid->addMultiCellWidget(label5,             10, 10, 0, 2);
    grid->addMultiCellWidget(m_contrastInput,    11, 11, 0, 2);
    grid->addMultiCellWidget(label6,             12, 12, 0, 2);
    grid->addMultiCellWidget(m_gammaInput,       13, 13, 0, 2);
    grid->setRowStretch(14, 10);
    grid->setMargin(m_gboxSettings->spacingHint());
    grid->setSpacing(m_gboxSettings->spacingHint());

    setToolSettings(m_gboxSettings);
    init();

    // -------------------------------------------------------------

    connect(m_densityInput, TQT_SIGNAL(valueChanged(double)),
            this, TQT_SLOT(slotTimer()));

    connect(m_powerInput, TQT_SIGNAL(valueChanged(double)),
            this, TQT_SLOT(slotTimer()));

    connect(m_radiusInput, TQT_SIGNAL(valueChanged(double)),
            this, TQT_SLOT(slotTimer()));

    connect(m_brightnessInput, TQT_SIGNAL(valueChanged(int)),
            this, TQT_SLOT(slotTimer()));

    connect(m_contrastInput, TQT_SIGNAL(valueChanged(int)),
            this, TQT_SLOT(slotTimer()));

    connect(m_gammaInput, TQT_SIGNAL(valueChanged(double)),
            this, TQT_SLOT(slotTimer()));
}

AntiVignettingTool::~AntiVignettingTool()
{
}

void AntiVignettingTool::renderingFinished()
{
    m_densityInput->setEnabled(true);
    m_powerInput->setEnabled(true);
    m_radiusInput->setEnabled(true);
    m_brightnessInput->setEnabled(true);
    m_contrastInput->setEnabled(true);
    m_gammaInput->setEnabled(true);
}

void AntiVignettingTool::readSettings()
{
    TDEConfig* config = kapp->config();
    config->setGroup("antivignettings Tool");

    m_densityInput->blockSignals(true);
    m_powerInput->blockSignals(true);
    m_radiusInput->blockSignals(true);
    m_brightnessInput->blockSignals(true);
    m_contrastInput->blockSignals(true);
    m_gammaInput->blockSignals(true);

    m_densityInput->setValue(config->readDoubleNumEntry("DensityAjustment", m_densityInput->defaultValue()));
    m_powerInput->setValue(config->readDoubleNumEntry("PowerAjustment", m_powerInput->defaultValue()));
    m_radiusInput->setValue(config->readDoubleNumEntry("RadiusAjustment", m_radiusInput->defaultValue()));
    m_brightnessInput->setValue(config->readNumEntry("BrightnessAjustment", m_brightnessInput->defaultValue()));
    m_contrastInput->setValue(config->readNumEntry("ContrastAjustment", m_contrastInput->defaultValue()));
    m_gammaInput->setValue(config->readDoubleNumEntry("GammaAjustment", m_gammaInput->defaultValue()));

    m_densityInput->blockSignals(false);
    m_powerInput->blockSignals(false);
    m_radiusInput->blockSignals(false);
    m_brightnessInput->blockSignals(false);
    m_contrastInput->blockSignals(false);
    m_gammaInput->blockSignals(false);

    slotEffect();
}

void AntiVignettingTool::writeSettings()
{
    TDEConfig* config = kapp->config();
    config->setGroup("antivignettings Tool");
    config->writeEntry("DensityAjustment", m_densityInput->value());
    config->writeEntry("PowerAjustment", m_powerInput->value());
    config->writeEntry("RadiusAjustment", m_radiusInput->value());
    config->writeEntry("BrightnessAjustment", m_brightnessInput->value());
    config->writeEntry("ContrastAjustment", m_contrastInput->value());
    config->writeEntry("GammaAjustment", m_gammaInput->value());
    m_previewWidget->writeSettings();
    config->sync();
}

void AntiVignettingTool::slotResetSettings()
{
    m_densityInput->blockSignals(true);
    m_powerInput->blockSignals(true);
    m_radiusInput->blockSignals(true);
    m_brightnessInput->blockSignals(true);
    m_contrastInput->blockSignals(true);
    m_gammaInput->blockSignals(true);

    m_densityInput->slotReset();
    m_powerInput->slotReset();
    m_radiusInput->slotReset();
    m_brightnessInput->slotReset();
    m_contrastInput->slotReset();
    m_gammaInput->slotReset();

    m_densityInput->blockSignals(false);
    m_powerInput->blockSignals(false);
    m_radiusInput->blockSignals(false);
    m_brightnessInput->blockSignals(false);
    m_contrastInput->blockSignals(false);
    m_gammaInput->blockSignals(false);
}

void AntiVignettingTool::prepareEffect()
{
    m_densityInput->setEnabled(false);
    m_powerInput->setEnabled(false);
    m_radiusInput->setEnabled(false);
    m_brightnessInput->setEnabled(false);
    m_contrastInput->setEnabled(false);
    m_gammaInput->setEnabled(false);

    double d = m_densityInput->value();
    double p = m_powerInput->value();
    double r = m_radiusInput->value();

    ImageIface* iface = m_previewWidget->imageIface();
    uchar *data       = iface->getOriginalImage();
    int orgWidth      = iface->originalWidth();
    int orgHeight     = iface->originalHeight();
    TQSize ps(orgWidth, orgHeight);
    ps.scale( TQSize(120, 120), TQSize::ScaleMin );

    // Calc mask preview.
    DImg preview(ps.width(), ps.height(), false);
    memset(preview.bits(), 255, preview.numBytes());
    AntiVignetting maskPreview(&preview, 0L, d, p, r, 0, 0, false);
    TQPixmap pix = maskPreview.getTargetImage().convertToPixmap();
    TQPainter pt(&pix);
    pt.setPen( TQPen(TQt::black, 1) );
    pt.drawRect( 0, 0, pix.width(), pix.height() );
    pt.end();
    m_maskPreviewLabel->setPixmap( pix );

    DImg orgImage(orgWidth, orgHeight, iface->originalSixteenBit(),
                           iface->originalHasAlpha(), data);
    delete [] data;

    setFilter(dynamic_cast<DImgThreadedFilter*>(new AntiVignetting(&orgImage, this, d, p, r, 0, 0, true)));
}

void AntiVignettingTool::prepareFinal()
{
    m_densityInput->setEnabled(false);
    m_powerInput->setEnabled(false);
    m_radiusInput->setEnabled(false);
    m_brightnessInput->setEnabled(false);
    m_contrastInput->setEnabled(false);
    m_gammaInput->setEnabled(false);

    double d = m_densityInput->value();
    double p = m_powerInput->value();
    double r = m_radiusInput->value();

    ImageIface iface(0, 0);

    uchar *data = iface.getOriginalImage();
    DImg orgImage(iface.originalWidth(), iface.originalHeight(), iface.originalSixteenBit(),
                           iface.originalHasAlpha(), data);
    delete [] data;

    setFilter(dynamic_cast<DImgThreadedFilter*>(new AntiVignetting(&orgImage, this, d, p, r, 0, 0, true)));
}

void AntiVignettingTool::putPreviewData(void)
{
    ImageIface* iface = m_previewWidget->imageIface();
    DImg imDest       = filter()->getTargetImage();

    // Adjust Image BCG.

    double b = (double)(m_brightnessInput->value() / 100.0);
    double c = (double)(m_contrastInput->value()   / 100.0) + (double)(1.00);
    double g = m_gammaInput->value();

    BCGModifier cmod;
    cmod.setGamma(g);
    cmod.setBrightness(b);
    cmod.setContrast(c);
    cmod.applyBCG(imDest);

    iface->putPreviewImage((imDest.smoothScale(iface->previewWidth(),
                                               iface->previewHeight())).bits());
    m_previewWidget->updatePreview();
}

void AntiVignettingTool::putFinalData(void)
{
    ImageIface iface(0, 0);

    iface.putOriginalImage(i18n("Vignetting Correction"),
                           filter()->getTargetImage().bits());

    double b = (double)(m_brightnessInput->value() / 100.0);
    double c = (double)(m_contrastInput->value()   / 100.0) + (double)(1.00);
    double g = m_gammaInput->value();

    // Adjust Image BCG.
    iface.setOriginalBCG(b, c, g);
}

}  // NameSpace DigikamAntiVignettingImagesPlugin