/* ============================================================
 *
 * This file is a part of digiKam project
 * http://www.digikam.org
 *
 * Date        : 2006-01-10
 * Description : a widget to display CIE tongue from an ICC profile.
 *
 * Copyright (C) 2006-2016 by Gilles Caulier <caulier dot gilles at gmail dot com>
 *
 * Any source code are inspired from lprof project and
 * Copyright (C) 1998-2001 Marti Maria
 *
 * 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.
 *
 * ============================================================ */

#include "cietonguewidget.h"

// C++ includes

#include <cmath>

// Qt includes

#include <QImage>
#include <QPainter>
#include <QPixmap>
#include <QFile>
#include <QTimer>
#include <QPaintEvent>

// KDE includes

#include <klocalizedstring.h>

// LibDRawDecoder includes

#include "dwidgetutils.h"

// Local includes

#include "digikam_config.h"
#include "digikam_debug.h"
#include "iccprofile.h"

namespace Digikam
{

/**
The following table gives the CIE  color matching functions
\f$\bar{x}(\lambda)\f$, \f$\bar{y}(\lambda)\f$, and
\f$\bar{z}(\lambda)\f$, for wavelengths \f$\lambda\f$ at 5 nanometer
increments from 380 nm through 780 nm. This table is used in conjunction
with Planck's law for the energy spectrum of a black body at a given
temperature to plot the black body curve on the CIE chart.

The following table gives the spectral chromaticity co-ordinates
\f$x(\lambda)\f$ and \f$y(\lambda)\f$ for wavelengths in 5 nanometer
increments from 380 nm through 780 nm. These coordinates represent the
position in the CIE x-y space of pure spectral colors of the given
wavelength, and thus define the outline of the CIE "tongue" diagram.
*/
static const double spectral_chromaticity[81][3] =
{
    { 0.1741, 0.0050 },               // 380 nm
    { 0.1740, 0.0050 },
    { 0.1738, 0.0049 },
    { 0.1736, 0.0049 },
    { 0.1733, 0.0048 },
    { 0.1730, 0.0048 },
    { 0.1726, 0.0048 },
    { 0.1721, 0.0048 },
    { 0.1714, 0.0051 },
    { 0.1703, 0.0058 },
    { 0.1689, 0.0069 },
    { 0.1669, 0.0086 },
    { 0.1644, 0.0109 },
    { 0.1611, 0.0138 },
    { 0.1566, 0.0177 },
    { 0.1510, 0.0227 },
    { 0.1440, 0.0297 },
    { 0.1355, 0.0399 },
    { 0.1241, 0.0578 },
    { 0.1096, 0.0868 },
    { 0.0913, 0.1327 },
    { 0.0687, 0.2007 },
    { 0.0454, 0.2950 },
    { 0.0235, 0.4127 },
    { 0.0082, 0.5384 },
    { 0.0039, 0.6548 },
    { 0.0139, 0.7502 },
    { 0.0389, 0.8120 },
    { 0.0743, 0.8338 },
    { 0.1142, 0.8262 },
    { 0.1547, 0.8059 },
    { 0.1929, 0.7816 },
    { 0.2296, 0.7543 },
    { 0.2658, 0.7243 },
    { 0.3016, 0.6923 },
    { 0.3373, 0.6589 },
    { 0.3731, 0.6245 },
    { 0.4087, 0.5896 },
    { 0.4441, 0.5547 },
    { 0.4788, 0.5202 },
    { 0.5125, 0.4866 },
    { 0.5448, 0.4544 },
    { 0.5752, 0.4242 },
    { 0.6029, 0.3965 },
    { 0.6270, 0.3725 },
    { 0.6482, 0.3514 },
    { 0.6658, 0.3340 },
    { 0.6801, 0.3197 },
    { 0.6915, 0.3083 },
    { 0.7006, 0.2993 },
    { 0.7079, 0.2920 },
    { 0.7140, 0.2859 },
    { 0.7190, 0.2809 },
    { 0.7230, 0.2770 },
    { 0.7260, 0.2740 },
    { 0.7283, 0.2717 },
    { 0.7300, 0.2700 },
    { 0.7311, 0.2689 },
    { 0.7320, 0.2680 },
    { 0.7327, 0.2673 },
    { 0.7334, 0.2666 },
    { 0.7340, 0.2660 },
    { 0.7344, 0.2656 },
    { 0.7346, 0.2654 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 },
    { 0.7347, 0.2653 }  // 780 nm
};

class CIETongueWidget::Private
{
public:

    Private() :
        profileDataAvailable(true),
        loadingImageMode(false),
        loadingImageSucess(false),
        needUpdatePixmap(false),
        uncalibratedColor(false),
        xBias(0),
        yBias(0),
        pxcols(0),
        pxrows(0),
        progressCount(0),
        gridside(0),
        progressTimer(0),
        hMonitorProfile(0),
        hXFORM(0)
    {
        progressPix = DWorkingPixmap();
    }

    bool                         profileDataAvailable;
    bool                         loadingImageMode;
    bool                         loadingImageSucess;
    bool                         needUpdatePixmap;
    bool                         uncalibratedColor;

    int                          xBias;
    int                          yBias;
    int                          pxcols;
    int                          pxrows;
    int                          progressCount;           // Position of animation during loading/calculation.

    double                       gridside;

    QPainter                     painter;

    QTimer*                      progressTimer;

    QPixmap                      pixmap;
    DWorkingPixmap   progressPix;

    cmsHPROFILE                  hMonitorProfile;
    cmsHTRANSFORM                hXFORM;
    cmsCIExyYTRIPLE              Primaries;
    cmsCIEXYZ                    MediaWhite;
};

CIETongueWidget::CIETongueWidget(int w, int h, QWidget* const parent, cmsHPROFILE hMonitor)
    : QWidget(parent), d(new Private)
{
    cmsHPROFILE hXYZProfile;
    d->progressTimer = new QTimer(this);
    setMinimumSize(w, h);
    setAttribute(Qt::WA_DeleteOnClose);
    dkCmsErrorAction(LCMS_ERROR_SHOW);

    if (hMonitor)
    {
        d->hMonitorProfile = hMonitor;
    }
    else
    {
        d->hMonitorProfile = dkCmsCreate_sRGBProfile();
    }

    hXYZProfile = dkCmsCreateXYZProfile();

    if (hXYZProfile == NULL)
        return;


    d->hXFORM = dkCmsCreateTransform(hXYZProfile, TYPE_XYZ_16,
                                     d->hMonitorProfile, TYPE_RGB_8,
                                     INTENT_PERCEPTUAL, 0);

    dkCmsCloseProfile(hXYZProfile);

    if (d->hXFORM == NULL)
        qCDebug(DIGIKAM_WIDGETS_LOG) << "Wrong d->hXFORM" ;

    connect(d->progressTimer, SIGNAL(timeout()),
            this, SLOT(slotProgressTimerDone()));
}

CIETongueWidget::~CIETongueWidget()
{
    dkCmsDeleteTransform(d->hXFORM);
    dkCmsCloseProfile(d->hMonitorProfile);
    delete d;
}

int CIETongueWidget::grids(double val) const
{
    return (int) floor(val * d->gridside + 0.5);
}

bool CIETongueWidget::setProfileData(const QByteArray& profileData)
{
    if (!profileData.isEmpty())
    {
        LcmsLock lock;
        cmsHPROFILE hProfile = dkCmsOpenProfileFromMem((void*)profileData.data(), (DWORD)profileData.size());

        if (!hProfile)
        {
            d->profileDataAvailable = false;
            d->loadingImageSucess   = false;
        }
        else
        {
            setProfile(hProfile);
            dkCmsCloseProfile(hProfile);
            d->profileDataAvailable = true;
            d->loadingImageSucess   = true;
        }
    }
    else
    {
        d->profileDataAvailable = false;
        d->loadingImageSucess   = false;
    }

    d->loadingImageMode = false;
    d->uncalibratedColor = false;

    d->progressTimer->stop();
    d->needUpdatePixmap = true;
    update();
    return (d->profileDataAvailable);
}

bool CIETongueWidget::setProfileFromFile(const QUrl& file)
{
    if (!file.isEmpty() && file.isValid())
    {
        LcmsLock lock;
        cmsHPROFILE hProfile = dkCmsOpenProfileFromFile(QFile::encodeName(file.toLocalFile()).constData(), "r");

        if (!hProfile)
        {
            d->profileDataAvailable = false;
            d->loadingImageSucess   = false;
        }
        else
        {
            setProfile(hProfile);
            dkCmsCloseProfile(hProfile);
            d->profileDataAvailable = true;
            d->loadingImageSucess   = true;
        }
    }
    else
    {
        d->profileDataAvailable = false;
        d->loadingImageSucess   = false;
    }

    d->loadingImageMode  = false;
    d->uncalibratedColor = false;

    d->progressTimer->stop();
    d->needUpdatePixmap = true;
    update();
    return (d->profileDataAvailable);
}

void CIETongueWidget::setProfile(cmsHPROFILE hProfile)
{
    // Get the white point.

    dkCmsTakeMediaWhitePoint(&(d->MediaWhite), hProfile);
    cmsCIExyY White;
    dkCmsXYZ2xyY(&White, &(d->MediaWhite));
    qCDebug(DIGIKAM_WIDGETS_LOG) << "Profile white point : x=" << White.x << " y=" << White.y << " Y=" << White.Y;

    // Get the colorant matrix.

    memset(&(d->Primaries),0,sizeof(cmsCIExyYTRIPLE));

    if (dkCmsIsTag(hProfile, icSigRedColorantTag)   &&
        dkCmsIsTag(hProfile, icSigGreenColorantTag) &&
        dkCmsIsTag(hProfile, icSigBlueColorantTag))
    {
        MAT3 Mat;

        if (dkCmsReadICCMatrixRGB2XYZ(&Mat, hProfile))
        {
#if defined(USE_LCMS_VERSION_1000)
            qCDebug(DIGIKAM_WIDGETS_LOG) << "dkCmsReadICCMatrixRGB2XYZ(1): " \
            << "[" << Mat.v[0].n[0] << ", " << Mat.v[0].n[1] << ", " << Mat.v[0].n[2] << "]" \
            << "[" << Mat.v[1].n[0] << ", " << Mat.v[1].n[1] << ", " << Mat.v[1].n[2] << "]" \
            << "[" << Mat.v[2].n[0] << ", " << Mat.v[2].n[1] << ", " << Mat.v[2].n[2] << "]" ;
#else
            qCDebug(DIGIKAM_WIDGETS_LOG) << "dkCmsReadICCMatrixRGB2XYZ(2): " \
            << "[" << Mat.Red.X << ", " << Mat.Red.Y << ", " << Mat.Red.Z << "]" \
            << "[" << Mat.Green.X << ", " << Mat.Green.Y << ", " << Mat.Green.Z << "]" \
            << "[" << Mat.Blue.X << ", " << Mat.Blue.Y << ", " << Mat.Blue.Z << "]" ;
#endif
            // Undo chromatic adaptation
            if (dkCmsAdaptMatrixFromD50(&Mat, &White))
            {
#if defined(USE_LCMS_VERSION_1000)
                cmsCIEXYZ tmp;

                tmp.X = Mat.v[0].n[0];
                tmp.Y = Mat.v[1].n[0];
                tmp.Z = Mat.v[2].n[0];
                qCDebug(DIGIKAM_WIDGETS_LOG) << "d->Primaries.Red   : X=" << tmp.X << " Y=" << tmp.Y << " Z=" << tmp.Z;
                // ScaleToWhite(&MediaWhite, &tmp);
                dkCmsXYZ2xyY(&(d->Primaries.Red), &tmp);

                tmp.X = Mat.v[0].n[1];
                tmp.Y = Mat.v[1].n[1];
                tmp.Z = Mat.v[2].n[1];
                qCDebug(DIGIKAM_WIDGETS_LOG) << "d->Primaries.Green : X=" << tmp.X << " Y=" << tmp.Y << " Z=" << tmp.Z;
                // ScaleToWhite(&MediaWhite, &tmp);
                dkCmsXYZ2xyY(&(d->Primaries.Green), &tmp);

                tmp.X = Mat.v[0].n[2];
                tmp.Y = Mat.v[1].n[2];
                tmp.Z = Mat.v[2].n[2];
                qCDebug(DIGIKAM_WIDGETS_LOG) << "d->Primaries.Blue  : X=" << tmp.X << " Y=" << tmp.Y << " Z=" << tmp.Z;
                // ScaleToWhite(&MediaWhite, &tmp);
                dkCmsXYZ2xyY(&(d->Primaries.Blue), &tmp);
#else
                cmsCIEXYZ tmp;

                tmp.X = Mat.Red.X;
                tmp.Y = Mat.Green.X;
                tmp.Z = Mat.Blue.X;
                qCDebug(DIGIKAM_WIDGETS_LOG) << "d->Primaries.Red   : X=" << tmp.X << " Y=" << tmp.Y << " Z=" << tmp.Z;
                // ScaleToWhite(&MediaWhite, &tmp);
                dkCmsXYZ2xyY(&(d->Primaries.Red), &tmp);

                tmp.X = Mat.Red.Y;
                tmp.Y = Mat.Green.Y;
                tmp.Z = Mat.Blue.Y;
                qCDebug(DIGIKAM_WIDGETS_LOG) << "d->Primaries.Green : X=" << tmp.X << " Y=" << tmp.Y << " Z=" << tmp.Z;
                // ScaleToWhite(&MediaWhite, &tmp);
                dkCmsXYZ2xyY(&(d->Primaries.Green), &tmp);

                tmp.X = Mat.Red.Z;
                tmp.Y = Mat.Green.Z;
                tmp.Z = Mat.Blue.Z;
                qCDebug(DIGIKAM_WIDGETS_LOG) << "d->Primaries.Blue  : X=" << tmp.X << " Y=" << tmp.Y << " Z=" << tmp.Z;
                // ScaleToWhite(&MediaWhite, &tmp);
                dkCmsXYZ2xyY(&(d->Primaries.Blue), &tmp);
#endif
            }
        }
    }
}

void CIETongueWidget::mapPoint(int& icx, int& icy, LPcmsCIExyY xyY)
{
    icx = (int) floor((xyY->x * (d->pxcols - 1)) + .5);
    icy = (int) floor(((d->pxrows - 1) - xyY->y * (d->pxrows - 1)) + .5);
}

void CIETongueWidget::biasedLine(int x1, int y1, int x2, int y2)
{
    d->painter.drawLine(x1 + d->xBias, y1, x2 + d->xBias, y2);
}

void CIETongueWidget::biasedText(int x, int y, const QString& txt)
{
    d->painter.drawText(QPoint(d->xBias + x, y), txt);
}

QRgb CIETongueWidget::colorByCoord(double x, double y)
{
    // Get xyz components scaled from coordinates

    double cx =       ((double) x) / (d->pxcols - 1);
    double cy = 1.0 - ((double) y) / (d->pxrows - 1);
    double cz = 1.0 - cx - cy;

    // Project xyz to XYZ space. Note that in this
    // particular case we are substituting XYZ with xyz

    cmsCIEXYZ XYZ = { cx , cy , cz };

    WORD XYZW[3];
    BYTE RGB[3];

    dkCmsFloat2XYZEncoded(XYZW, &XYZ);
    dkCmsDoTransform(d->hXFORM, XYZW, RGB, 1);

    return qRgb(RGB[0], RGB[1], RGB[2]);
}

void CIETongueWidget::outlineTongue()
{
    int lx=0, ly=0;
    int fx=0, fy=0;

    for (int x = 380; x <= 700; x += 5)
    {
        int ix = (x - 380) / 5;

        cmsCIExyY p = {spectral_chromaticity[ix][0],
                       spectral_chromaticity[ix][1], 1
                      };

        int icx, icy;
        mapPoint(icx, icy, &p);

        if (x > 380)
        {
            biasedLine(lx, ly, icx, icy);
        }
        else
        {
            fx = icx;
            fy = icy;
        }

        lx = icx;
        ly = icy;
    }

    biasedLine(lx, ly, fx, fy);
}

void CIETongueWidget::fillTongue()
{
    QImage Img = d->pixmap.toImage();

    int x;

    for (int y = 0; y < d->pxrows; ++y)
    {
        int xe = 0;

        // Find horizontal extents of tongue on this line.

        for (x = 0; x < d->pxcols; ++x)
        {
            if (QColor(Img.pixel(x + d->xBias, y)) != QColor(Qt::black))
            {
                for (xe = d->pxcols - 1; xe >= x; --xe)
                {
                    if (QColor(Img.pixel(xe + d->xBias, y)) != QColor(Qt::black))
                    {
                        break;
                    }
                }

                break;
            }
        }

        if (x < d->pxcols)
        {
            for ( ; x <= xe; ++x)
            {
                QRgb Color = colorByCoord(x, y);
                Img.setPixel(x + d->xBias, y, Color);
            }
        }
    }

    d->pixmap = QPixmap::fromImage(Img, Qt::AvoidDither);
}

void CIETongueWidget::drawTongueAxis()
{
    QFont font;
    font.setPointSize(6);
    d->painter.setFont(font);

    d->painter.setPen(qRgb(255, 255, 255));

    biasedLine(0, 0,           0,           d->pxrows - 1);
    biasedLine(0, d->pxrows-1, d->pxcols-1, d->pxrows - 1);

    for (int y = 1; y <= 9; y += 1)
    {
        QString s;
        int xstart = (y * (d->pxcols - 1)) / 10;
        int ystart = (y * (d->pxrows - 1)) / 10;

        s.sprintf("0.%d", y);
        biasedLine(xstart, d->pxrows - grids(1), xstart,   d->pxrows - grids(4));
        biasedText(xstart - grids(11), d->pxrows + grids(15), s);

        s.sprintf("0.%d", 10 - y);
        biasedLine(0, ystart, grids(3), ystart);
        biasedText(grids(-25), ystart + grids(5), s);
    }
}

void CIETongueWidget::drawTongueGrid()
{
    d->painter.setPen(qRgb(80, 80, 80));

    for (int y = 1; y <= 9; y += 1)
    {
        int xstart =  (y * (d->pxcols - 1)) / 10;
        int ystart =  (y * (d->pxrows - 1)) / 10;

        biasedLine(xstart, grids(4), xstart,   d->pxrows - grids(4) - 1);
        biasedLine(grids(7), ystart, d->pxcols-1-grids(7), ystart);
    }
}

void CIETongueWidget::drawLabels()
{
    QFont font;
    font.setPointSize(5);
    d->painter.setFont(font);

    for (int x = 450; x <= 650; x += (x > 470 && x < 600) ? 5 : 10)
    {
        QString wl;
        int bx = 0, by = 0, tx, ty;

        if (x < 520)
        {
            bx = grids(-22);
            by = grids(2);
        }
        else if (x < 535)
        {
            bx = grids(-8);
            by = grids(-6);
        }
        else
        {
            bx = grids(4);
        }

        int ix = (x - 380) / 5;

        cmsCIExyY p = {spectral_chromaticity[ix][0],
                       spectral_chromaticity[ix][1], 1
                      };

        int icx, icy;
        mapPoint(icx, icy, &p);

        tx = icx + ((x < 520) ? grids(-2) : ((x >= 535) ? grids(2) : 0));
        ty = icy + ((x < 520) ? 0 : ((x >= 535) ? grids(-1) : grids(-2)));

        d->painter.setPen(qRgb(255, 255, 255));
        biasedLine(icx, icy, tx, ty);

        QRgb Color = colorByCoord(icx, icy);
        d->painter.setPen(Color);

        wl.sprintf("%d", x);
        biasedText(icx+bx, icy+by, wl);
    }
}

void CIETongueWidget::drawSmallElipse(LPcmsCIExyY xyY, BYTE r, BYTE g, BYTE b, int sz)
{
    int icx, icy;

    mapPoint(icx, icy, xyY);
    d->painter.setPen(qRgb(r, g, b));
    d->painter.drawEllipse(icx + d->xBias- sz/2, icy-sz/2, sz, sz);
}

void CIETongueWidget::drawColorantTriangle()
{
    drawSmallElipse(&(d->Primaries.Red),   255, 128, 128, 6);
    drawSmallElipse(&(d->Primaries.Green), 128, 255, 128, 6);
    drawSmallElipse(&(d->Primaries.Blue),  128, 128, 255, 6);

    int x1, y1, x2, y2, x3, y3;

    mapPoint(x1, y1, &(d->Primaries.Red));
    mapPoint(x2, y2, &(d->Primaries.Green));
    mapPoint(x3, y3, &(d->Primaries.Blue));

    d->painter.setPen(qRgb(255, 255, 255));

    biasedLine(x1, y1, x2, y2);
    biasedLine(x2, y2, x3, y3);
    biasedLine(x3, y3, x1, y1);
}

void CIETongueWidget::drawWhitePoint()
{
    cmsCIExyY Whitem_pntxyY;
    dkCmsXYZ2xyY(&Whitem_pntxyY, &(d->MediaWhite));
    drawSmallElipse(&Whitem_pntxyY,  255, 255, 255, 8);
}

void CIETongueWidget::loadingStarted()
{
    d->progressCount      = 0;
    d->loadingImageMode   = true;
    d->loadingImageSucess = false;
    update();
    d->progressTimer->start(200);
}

void CIETongueWidget::loadingFailed()
{
    d->progressTimer->stop();
    d->progressCount      = 0;
    d->loadingImageMode   = false;
    d->loadingImageSucess = false;
    update();
}

void CIETongueWidget::uncalibratedColor()
{
    d->progressTimer->stop();
    d->progressCount      = 0;
    d->loadingImageMode   = false;
    d->loadingImageSucess = false;
    d->uncalibratedColor  = true;
    update();
}

void CIETongueWidget::updatePixmap()
{
    d->needUpdatePixmap = false;
    d->pixmap = QPixmap(size());

    // Draw the CIE tongue curve.

    d->pixmap.fill(Qt::black);
    d->painter.begin(&d->pixmap);

    int pixcols = d->pixmap.width();
    int pixrows = d->pixmap.height();

    d->gridside = (qMin(pixcols, pixrows)) / 512.0;
    d->xBias    = grids(32);
    d->yBias    = grids(20);
    d->pxcols   = pixcols - d->xBias;
    d->pxrows   = pixrows - d->yBias;

    d->painter.setBackground(QBrush(qRgb(0, 0, 0)));
    d->painter.setPen(qRgb(255, 255, 255));

    outlineTongue();
    d->painter.end();

    fillTongue();

    d->painter.begin(&d->pixmap);
    drawTongueAxis();
    drawLabels();
    drawTongueGrid();

    if (d->MediaWhite.Y > 0.0)
    {
        drawWhitePoint();
    }

    if (d->Primaries.Red.Y != 0.0)
    {
        drawColorantTriangle();
    }

    d->painter.end();
}

void CIETongueWidget::paintEvent(QPaintEvent*)
{
    QPainter p(this);

    // Widget is disable : drawing grayed frame.

    if ( !isEnabled() )
    {
        p.fillRect(0, 0, width(), height(),
                   palette().color(QPalette::Disabled, QPalette::Background));

        QPen pen(palette().color(QPalette::Disabled, QPalette::Foreground));
        pen.setStyle(Qt::SolidLine);
        pen.setWidth(1);

        p.setPen(pen);
        p.drawRect(0, 0, width(), height());

        return;
    }

    // Loading image mode.

    if (d->loadingImageMode && !d->loadingImageSucess)
    {
        // In first, we draw an animation.

        QPixmap anim(d->progressPix.frameAt(d->progressCount));
        d->progressCount++;

        if (d->progressCount >= d->progressPix.frameCount())
        {
            d->progressCount = 0;
        }

        // ... and we render busy text.

        p.fillRect(0, 0, width(), height(), palette().color(QPalette::Active, QPalette::Background));
        p.drawPixmap(width()/2 - anim.width() /2, anim.height(), anim);
        QPen pen(palette().color(QPalette::Active, QPalette::Text));
        pen.setStyle(Qt::SolidLine);
        pen.setWidth(1);

        p.setPen(pen);
        p.drawRect(0, 0, width(), height());
        p.drawText(0, 0, width(), height(), Qt::AlignCenter,
                   i18n("Loading image..."));

        return;
    }

    // No profile data to show, or RAW file

    if (!d->profileDataAvailable || (!d->loadingImageMode && !d->loadingImageSucess))
    {
        p.fillRect(0, 0, width(), height(), palette().color(QPalette::Active, QPalette::Background));
        QPen pen(palette().color(QPalette::Active, QPalette::Text));
        pen.setStyle(Qt::SolidLine);
        pen.setWidth(1);

        p.setPen(pen);
        p.drawRect(0, 0, width(), height());

        if (d->uncalibratedColor)
        {
            p.drawText(0, 0, width(), height(), Qt::AlignCenter,
                       i18n("Uncalibrated color space"));
        }
        else
        {
            p.setPen(Qt::red);
            p.drawText(0, 0, width(), height(), Qt::AlignCenter,
                       i18n("No profile available..."));
        }

        return;
    }

    // Create CIE tongue if needed
    if (d->needUpdatePixmap)
    {
        updatePixmap();
    }

    // draw prerendered tongue
    p.drawPixmap(0, 0, d->pixmap);
}

void CIETongueWidget::resizeEvent(QResizeEvent* event)
{
    Q_UNUSED(event);
    setMinimumHeight(width());
    d->needUpdatePixmap = true;
}

void CIETongueWidget::slotProgressTimerDone()
{
    update();
    d->progressTimer->start(200);
}

}  // namespace Digikam
